WO2013041227A2

WO2013041227A2 - Paper dispenser

Info

Publication number: WO2013041227A2
Application number: PCT/EP2012/003929
Authority: WO
Inventors: Jürgen Metzger
Original assignee: Glessdox Gmbh & Co. Kg
Priority date: 2011-09-20
Filing date: 2012-09-20
Publication date: 2013-03-28
Also published as: EP2757928A2; EP2757928B1; DE102011113693A1; WO2013041227A3

Abstract

The invention relates to a paper dispenser, in particular a paper towel dispenser, for delivering a paper web of a predetermined length to a user, with a housing (1), a paper roll support (24, 25a, 25b) arranged in the housing (1), paper guiding elements (27, 28), a transport roller (26), a button (21) arranged on the housing (1) for initiating the transport of paper via the transport roller (26) and a cutting function (80), wherein the button (21) is connected via a lever (22b) to a drive (33, 34) for the transport roller (26), said drive effecting the advancement of the predetermined length of paper when the lever (22b) is actuated, wherein the lever (22b) acts on the drive element (33, 34) via a slip clutch (43, 44, 45).

Description

The invention relates to a paper dispenser for delivering a paper web of defined length to a user, comprising a housing, a paper roll storage disposed in the housing, paper guide elements, a transport roller, a button arranged on the housing for triggering the transport via the transport roller and a cutting function. The paper dispenser is particularly a towel dispenser, as used for example in inns or companies in kitchens and lavatories.

Paper dispensers of the type described above are widely in use and described many times. They contain a paper supply on a paper roll from which a defined length can be unwound when a lever is actuated. The unwound paper length is separated from the paper web either completely or partially (perforation) by means of a cutting knife and can be removed by the user or is torn off by the user along a cutting edge.

A common problem with such more or less automatic paper dispensers is the relatively low robustness of the deployment and transport mechanism. Especially in the public sector, but also in companies suffer such devices under excessive force by the user, often trouble about an insufficient function (slow paper transport, paper out, clamping feed) plays a role. Even when operated by drunk or rampaging users, it often causes damage.

BESTÄTIGUNGSKOP1E In such misuse, the damage caused by a broken lever is often the lesser evil. Above all, damage to the transport mechanism, which leads to a replacement of the usually more complicated transmission or parts thereof, is feared. Although the susceptibility of paper dispensers has often led to the installation of hot air dryers, but have the disadvantage that with the hot air, an aerosol is distributed, which may contain germs. Hot air dryers are therefore less desirable in many places, especially in hygienically problematic zones (kitchens, hospitals). The object of the invention is to provide a paper dispenser that has a secure paper feed that can be mechanically triggered by the user, but at the same time has a security mechanism that avoids too "robust" handling that damage to the paper feed occur be shapely, be equipped only with paper rolls from the manufacturer, have a reserve function for paper and a lock in the absence of paper and be easy to repair.

This object is achieved with a paper dispenser of the type mentioned, in which the key is connected via a lever to a drive for the transport roller, which causes the feed of the predetermined paper length when the key is pressed, wherein the lever acts on the drive via a slip clutch ,

The paper dispenser according to the invention has a paper roll storage in a housing, from which a paper roll is fed via paper guide elements of a transport roller, which is activated via a button arranged on the housing. Furthermore, the paper dispenser has a cutting function with which the paper web is preferably either severed or perforated so that the cut piece can be easily removed. A separation over a cutting edge / spoiler edge is also possible. Preferably, the elements of the paper roll storage, the paper transport and the cutting device are arranged as a unit removably in the housing.

The button for triggering the paper transport on the transport roller is suitably arranged below the housing and connected via a lever to the drive, which acts on the transport roller. The actuator causes the actuation of a defined paper length when the lever is actuated. The lever itself is connected to the drive via a friction clutch.

The drive is in particular a toothed gear in question, which consists of a toothed lever and arranged on the transport roller gear. The toothed lever is connected via the slip clutch with the lever of the button.

The slip clutch causes that when lever is pressed too fast or too hard, the lever no longer acts on the transmission but runs idle. The slip clutch expediently consists of a clamping ring, a driving ring and a cam ring with rounded cams, wherein the cam ring engage in corresponding recesses of the driving ring. The clamping ring is made of a suitable resilient material, such as a spring steel or a plastic elastic element, such as POM (polyoxymethylene).

It is understood that the key or the lever of the key has a return mechanism, such as a spring element, which is in communication with the housing. In order to prevent a reverse rotation of the transport roller, this is provided on the opposite side of the toothed gear expediently with a backstop, for example via a lever engaging in a gear, which prevents the return of the gear, but releases the paper transport in the transport direction.

In the paper dispenser according to the invention, the paper roll is mounted on bearing elements in the housing, such that a paper web can be conveyed and discharged via the transport roller. At the same time, the paper roll is in a position via a guide element, which is arranged in the region of its longitudinal axis Guided shaft, which allows in particular an accurate positioning. It is sufficient that such a guide shaft is present on only one side of the paper roll; but two guide shafts, one on each side of the roll of paper, are quite possible. The guide element is expediently round and is fixed on its one side in the axis of the paper roll, while being held and guided with a wheel rim on the opposite side in the guide shaft.

To ensure that the paper dispenser according to the invention is equipped only with paper rolls provided for this purpose, the guide element can be equipped with a locking pin, which initially releases a locking lever when properly inserted in the guide shaft and thus opens the access to the other guide slot. The locking pin is then sheared off in a constriction reuse of the guide element is thus excluded.

The guide shaft may further comprise a safety lever, which is taken along with the introduction of the paper roll from the guide element and thereby releases a lock acting on a bearing roller of the paper roll. Without entrainment of the safety lever, the bearing roller remains blocked, so that unwinding of the paper roll is not possible. The bearing roller has for this purpose on the side facing away from the paper roll side locking elements, in which engages the free end of the safety lever or a detent entrained by the locking lever in the rest position.

For this purpose, the safety lever is pivotally mounted in the region of the guide and is taken from the guide element of a paper roll. The lock is thereby pivoted, so that the paper bed roll is released. The safety lever is released again when the paper roll is unwound so far that the guide element with the remaining roll falls out of the guide shaft. The safety lever returns to its original position and blocks the bearing roller again.

The guide element of the paper rolls fulfills a dual function. On the one hand it serves the correct guidance of the paper rolls within the donor, for Others, it ensures that the paper dispenser according to the invention is equipped only with the appropriate and suitable paper rolls. When introducing the guide element in the guide shaft, the guide element with the locking pin first moves the locking lever such that the guide element penetrates to the locking lever. After releasing the locking lever, the guide element with its wheel rim actuates the safety lever, which it carries on its further way through the guide shaft. In the shaft of the locking pin is sheared off at a designated rib, which is accomplished for example by the weight of the paper roll. Only after shearing the locking pin, the guide element can reach with the safety lever in the working position on the bearing rollers. Without a locking pin, the guide element is not reusable because the locking lever can not be overcome. To operate the safety lever, the locking pin is not required.

In the region of the guide shaft, the locking lever may further serve as a retaining element with which a spare paper roll is retained in the guide, which is only released when the safety lever is in its initial position. This is usually the case when the activated paper roll is completely or almost completely consumed, so that it falls out of the paper roll storage and thus releases the space for the reserve roll. The safety lever then returns to its original position. The safety lever and the locking lever are arranged for this purpose and act together so that the locking lever is released only when the safety lever has returned to its original position.

The paper roll is stored in the housing on a paper roll storage, such that a paper web can be guided into the transport roller. For this purpose, at least two bearing rollers are required, on which the paper roll is movable, ie unrolled, held. Conveniently located on the back of the paper dispenser is a continuous bearing roller, while on the front side in the region of the transport roller, two small bearing rollers are provided, each supporting only the ends of the paper roll. These bearing rollers are movable, which is located on the side of the guide shaft is thereby through the Locking locked when the safety lever is in the starting position. The surface of the bearing rollers may be corrugated to prevent the paper roll from being unwound when gripped.

The actual transport mechanism consists of a transport roller which is driven via the drive element described above, expediently a toothed gear, as well as various support elements, in particular a pressure roller. The paper web is passed from the paper roll over the pressure roller and around to the transport roller, which advances the paper web by pressing the key function by a defined length. The paper web then exits the lower end of the paper dispenser and can be removed by the user.

The paper dispenser has a cutting function, which may be provided for example in the form of a tear-off edge in the lower end. However, a cutting function integrated in the transport roller is preferred which acts on the paper web via one or more slots arranged therein. When the transport roller is rotated, a toothed gear causes the knife to be extended after the processing of a certain paper length and this paper length is separated off. For this purpose, the knife has a toothed lever which interacts with teeth arranged on a central axis, these teeth, when the toothed lever passes the knife, setting up the knife for a short time and effecting the severing or perforation of the paper web. The central axis is fixed, the transport roller with the cutting function rotates about this central axis.

Furthermore, the paper dispenser according to the invention expediently on the transport roller on a groove, in or above which a slider runs, which falls in the absence of a paper web into the groove and moves a lever arranged above the transport roller. The lever in turn moves a tilting element, which cooperates with an arranged in front of the transport roller handle, which is directly adjacent to the transport roller and the pressure roller. If the sliding element falls into the groove, the lever and the tilting element release the stirrup, which releases itself from the transport roller and thus the (automatic) threading of a new paper web from a reserve roll allowed. The located in the housing of the paper dispenser core of the paper roll with the guide element falls out of the bottom of the housing.

Incidentally, the paper dispenser according to the invention has a housing with a wall part, a bottom group and a movable lid, which is connected via a hook mechanism with the housing wall part. In this case, the movable lid is mounted on the wall part via a hinge and an elastic holding element.

Preferably, the lid has a guide roller in the region of the hinge, which runs on a slide rail. The guide roller is located on an extension of the hinge arm of the lid. The radius of the slide, relative to the pivot point of the hinge, is slightly less in the central area than in the end areas, such that resistance is overcome when the lid is opened and the lid, when the guide rollers are passed beyond the resistance point, in the open position stops. The forces are absorbed by the elastic support arms that extend from the rear wall toward the lid and receive the hinge.

The locking mechanism, by means of which the cover is latched to the housing, consists of two cooperating hooks which hook into one another in the locking position and can be separated by a regulating mechanism. As a rule, the hook arranged on the lid is fixed and the housing arranged on the movable, with a spring mechanism is a reset possibility.

A paper dispenser according to the invention may have one or two locks on the housing.

The locking mechanism is usually operated via a lock, which is arranged on the bottom part of the housing. The lock acts on a release latch, which is movable in the horizontal direction, on a likewise horizontally arranged cross bar. Release latch and crossbar have correspondingly extending slopes, which cause the Cross bar is raised upon actuation of the lock and also acts via an inclined surface on one of the housing-side hook of the locking mechanism. This hook is lowered over a projection against the spring action of a spring element fixed to the housing and releases the cover.

In parallel, the release latch acts on a arranged on the bottom part of the housing release spring, which dissolves a bottom flap from its lock and causes them to fold out of the housing bottom. The deposited on shelves of this bottom element paper roll core with guide element can be removed after complete processing of the paper. The bottom flap of the bottom element is held in the locking position by means of detents, which can be released via a spring mechanism. On the opposite side of the detents is a hinge.

The invention is explained in more detail by the accompanying drawings. These show:

Figure 1 is a side sectional view of the housing of a paper dispenser according to the invention;

Figure 2, the cover storage of the housing according to

FIG. 1;

Figure 3 shows the principle of the lid lock;

Figure 4, the bottom group of the housing;

Figure 5 is an overall view of the paper holder and the transport mechanism, as they are arranged reversibly in the housing of Figure 1;

FIG. 6 shows the transport roller with its drive;

Figure 7 parts of the drive; FIG. 8 shows the guide shaft for the paper roll from the outside;

Figure 9 paper guide from the right;

FIG. 10 shows the transport roller with the sliding element and its control;

Figure 1 1 the drive of the cutting mechanism;

FIG. 12 shows a guide element; such as

13 shows the guide shaft for the paper roll from the inside. Figure 1 shows a side view of a housing 1 of a paper dispenser according to the invention. The housing has a wall part 2, a bottom group 3 and a movable cover 4, which is connected via a hook mechanism 5a / 5b with the housing wall part 2. The cover 4 is mounted on the wall part 2 via a hinge 6 and a guide roller 7 running on a rail 8. The hinge 6 is arranged on an elastic support arm 6 a, which in turn is fixed to wall parts 2.

The storage on the guide roller 7 and slide 8 in conjunction with the hinge 6 - all these elements are arranged near the side walls of the wall part 2 - has the advantage that a tight guidance of the lid is given when opening and at the same time, on the elasticity of the support arms 6a, a possibility of locking the lid 4 is given in the open state.

The locking mechanism consists of the two hooks 5a and 5b, which cooperate with the hook 5a fixed to the cover 4 and the hook 5b movable on the wall part 2. The hook 5b further comprises a spring element 5c, which abuts against a projection 5e the side wall of the housing 1 acts and a lever 5d, which can be triggered via an externally triggered Mechanism moves the hook 5b such that a release is effected.

Figure 2 shows details of the mounting of the lid 4 on the wall portion of the housing 1 with the hinge 6 (hidden) and the roller / sliding mechanism, wherein the roller 7 is arranged on an extension of the support arm 6a and acts against the slide rail 8. When opening the lid 4, the roller 7 moves on the slide rail 8 downwards, wherein the radius of the slide rail 8, based on the pivot point of the hinge 6, in the upper and in the lower region is slightly larger than in the central region, so that when opening the Cover a resistance is overcome and the lid, when the roller 7 has overcome over the resistance point, remains in the open position. The holding arm 6 a, on which the hinge 6 is mounted, is elastically formed and fixed to the wall part 2.

Figure 3 shows the locking mechanism for the hooks 5a and 5b in detail. The hook 5 b, which is arranged on the wall part 2 of the housing, has the spring element 5 c and the lever 5 d, which has an inclined surface in the end region, which cooperates with a trigger element 9 of a cross bar 10. The cross bar 10 with its trigger element 9 is vertically displaceable, such that upon an upward movement of the trigger element 9 of the hook 5b is moved downward and the locking with the hook 5a is free. The spring element 5c causes the return as soon as the trigger element 9 has returned to its original position.

The crossbar 10 has below the triggering element 9 on a sloping edge, which cooperates with a correspondingly extending slope of a locking bolt 1 1. The locking bolt 1 1 is displaceable in the horizontal direction, wherein in its initial / rest position of the hook 5 b remains in the closed position and 10 raised in the release position of the crossbar so that the trigger element 9 disengages the hook 5 b from the closed position. On the opposite side of the housing is a corresponding locking mechanism which is actuated via a second trigger element 9 of the cross bar 10 and the locking bolt 11.

Figure 4 shows the bottom group 3 of the paper dispenser according to the invention with the locking mechanism for the hook 5b. The cross bar 10 can be seen in the openings of the wall part 2, as well as the upwardly projecting trigger element 9, which acts on the lever 5d of the hook 5b. Below the trigger element 9 of the cross bar 10 of the oblique and cooperating with the slope of the cross bar 10 part of the locking bolt 11 can be seen, via a lock cylinder 13; a connected pin 13a on the tab 1 1 a can be moved in the horizontal direction. The horizontal movement of the locking bar 1 1 causes the raising of the cross bar 10 via the inclined element 12th

The spring latch 16 acts on the one hand, the provision of the locking bolt 1 in the rest position after making unlocking of the lid 4, on the other hand, but also the unlocking of a Bottom flap 17 via two locking elements 18 which are withdrawn upon actuation of the lever 15 from the locking position. A lying on the shelves 19 paper roll core can be removed with the bottom flap 17 open. The shelves 19 are part of the bottom flap 17 and fold with this down from the bottom group 3 out. On the opposite side of the locking elements 18 is located to a hinge.

Figure 5 shows an insert 20 of the paper dispenser according to the invention with guide and storage for the paper rolls and the transport mechanism for the paper web.

The insert 20 has on the left side an angled guide shaft 23 into which a guide element of a paper roll can be inserted and the paper roll can be brought into position for the settlement. Such a paper roll then comes to lie on the bearing rollers 24, 25a and 25b, which ensure the settlement. A paper web is around the pinch roller 27 around Transport roller 26 passed, which passes the paper web on the back to be issued down. The transport roller itself is actuated via the key 21 and the associated levers 22a / 22b. The pressure roller 27 is held on both sides via spring elements 29 in position relative to the transport roller. A bracket 28 serves as a paper guide and is folded over a folding mechanism (not shown) when the paper roll is unwound. A protective cover 31 has at its ends two elastic tongues 31 b, which can jump up the housing cover 4 when unlocked elastic. At the back of the insert are hooks 30, with which the insert 20 can be inserted into corresponding recesses on the rear wall 2 of the housing. A protective element 31 a prevents a largely unwound roll of paper in the transport mechanism device; as soon as a paper roll is unwound so that it is no longer held by the bearing rollers 24, 25a and 25b, it falls downwards, but is collected so that it can be unwound to the end of the paper web. With the paper roll and the guide element falls out of the guide shaft 23 and releases the safety lever, which returns to its original position. The guide shaft 23 can now accommodate a new roll of paper.

Figure 6 shows details of the drive of the transport roller 26. The transport roller has on the left side a ring gear 33 which cooperates with a toothed lever 34. This toothed lever 34 is actuated via the arm or lever 22b, which in turn is connected to the key 21 (FIG. 5).

The transport roller 26 has a slot 32 for a cutting device and a circumferential groove 35, above which a sliding member 36 is arranged, which responds to the presence or absence of paper to be transported. Above the transport roller 26 is the housing of the bearing roller 25a for a paper roll.

Details of the transmission and the transmission for actuating the transport roller 26 are shown in FIG. The lever or arm 22b has in its end region a recess 41 which serves as a receptacle for the driver element 40. At the driver element 40 arranged webs 42 fit into corresponding extensions 42a of the recesses 41 of the arm 22b as well as the drive plate 44. In the assembled state, the driver element 40 extends through the recess 41 of the arm 22b in the recess of the drive plate 44, wherein between lever arm 22b and drive plate 44, an elastic clamping ring 43 is fitted.

To the drive plate 44, which has on the side facing away from the lever arm 22b side rounded recesses 47, a cam plate 45 connects to the rounded cam 46 has on the drive plate 44 facing side. The rounded cams 46 fit into the rounded recesses 47 of the drive plate 44. Upon actuation of the button 21 is transmitted via the lever arm 22b force on the cam plate 45 which moves with the lever arm 42, unless the force is so great that they too a separation of cam plate 45 and drive plate 44 leads. The clamping ring 43 leads to a bias that is sufficiently dimensioned so that upon appropriate operation of the button 21, the key movement is transmitted to the tooth gear on the transport roller 26. Too much actuation of the button 21, the clamping ring 43 acts in conjunction with the rounded cam 46 of the cam ring 45 and the drive plate 44 as a slip clutch, whereby damage to the transport roller 26 and the holding mechanism of the paper dispenser can be avoided.

The gear consists of the toothed lever 34, which cooperates with the gear 33 of the transport roller 26. The toothed lever 34 has a rounded indentation 51 into which an annular projection 49 of the cam ring 45 engages. Upon actuation of the toothed gear 33, 34, the annular projection 49 moves within the recess 51. The projection 50 of the toothed lever 34 engages in a recess 48 of the cam plate 45, another round projection 53 of the cam plate 45 rests on a rounded end portion 54 of the toothed lever 34 such that upon actuation of the button 21 a downward movement of the boss 53 presses on the end portion 54 of the gear lever 34 and forces it to a downward movement, which is transmitted to the gear 33 of the transport roller 26. A spring hook 52 on the spring arm 22b is connected via a spring element to the housing 1 of the paper dispenser according to the invention and serves to return the lever arm 22b to the starting position.

FIG. 8 shows the guiding and transport mechanism of the paper dispenser according to the invention with the angled guide shaft 23 with the guide element 60 inserted.

The guide shaft 23 is limited at its open end by the receptacle 61, in which the guide member 60 is inserted accurately. The guide member 60 has a head part anchored in and supporting the center of the paper roll, a guide part running in the guide rail 23, and a rim which is dimensioned so that the guide member can not jump out of the guide shaft 23. The guide element 60 can emerge again at an extension 65 of the guide shaft 23 at the lower end. To ensure the authenticity of a roll of paper, the guide member 60 is provided with a locking pin 60a, which is centrally located on the outside thereof. The locking pin 60 a is dimensioned so that it can move a locking lever 63 immediately behind the receptacle 61 of the guide shaft 23 and thus allows further access into the guide shaft 23. In the course of the guide shaft 23 is a constriction or rib (not shown), in which the locking pin 60a is sheared off. With its wheel rim, the guide member 60 then takes with it a safety lever 62, which moves down so far with the paper roll, that the paper roll comes to rest on the bearing rollers 24, 25a and 25b. In this downward movement of the locking lever 62 takes a detent 64, which rotates a pawl 64a of locking elements 66 of the bearing roller 25a on the outside thereof. The transport mechanism for the paper is thus released only when the locking action on the bearing roller 25a is released via the securing lever 62 and the lock 64. Lock lever 63 and locking lever 62 are coupled together so that a pin 62a of the locking lever 62, which in a hook-shaped recess 63a the locking lever 63 engages, is released by the movement of the locking lever 63 from the recess 63 a. Only after the release (by the locking pin 60a) can a paper roll enter the guide slot.

Once the paper roll is unwound so far that it is no longer held by the bearing rollers 24, 25 a and 25 b, it falls down through, but remains on the shelves 19 in the paper transport roller 26 and the pressure roller 27. In this case, although the Locking action on the bearing roller 25a again; the safety lever 62 moves back to its original position and causes the catch 64 with the pawl 64a hooks back into the locking elements 66 of the bearing roller 25a, but this has no effect on the unwinding of the residual role, which is below the paper storage rolls. A spare roll with a fresh guide element 60 with intact locking pin 60a can move up in the guide shaft 23. The paper web is then brought by the staff, possibly to automatic, in the transport position.

The remaining roll will wind in the lower part of the machine until the last paper is ejected; Subsequently, the roll core with the guide element 60 can be removed from the shelves 19 via the bottom flap 17 described above (FIG. 4). Figure 9 shows details of the storage and transport mechanism for the paper to be dispensed. To recognize on the left side of the guide shaft 23 with its extended end 65, from which the guide member 60 can emerge. The paper roll is held on the bearing rollers 24, 25a and 25b (not shown) as long as the diameter is larger than the pitch of the rollers 24 and 25a. Then it falls down through and comes to the bearing surfaces 19 in the bottom portion 3 of the housing 1 to lie. The unwinding process continues around the pinch roller 27 back to the transport roller 26 and down to the paper exit (not shown). As soon as the paper roll is largely unwound and has fallen down, the safety lever 62 (FIG. 8) swings back upwards, which causes the Lock 64a of the bearing roller 25a activated again. However, the paper roll is no longer held by the bearing rollers, so this has no influence on the paper transport at this stage.

As soon as the remaining roll has also been unwound, this is perceived by a sliding element 70 (FIG. 10) which, via a lever mechanism, moves the bar 28, which lies directly in front of the pinch roller 27, away from the pinch roller 27. This clears the way for threading a new paper web around the roller 27 into the nip between the transport roller 26 and pinch roller 27. As soon as the new paper web raises the sliding lever 70 again, the bracket 28 falls back into its normal position and supports the transport roller 26 and the pressure roller 27 in their function.

The transport roller 26 has on the right side a ring gear 77 with inclined teeth and a cooperating with the ring gear locking member 78, which together represent a backstop. As shown in detail in FIG. 10, the sliding element 70 lies above a groove 35 of the transport roller 26. An inserted paper web prevents the sliding element 70 from sinking into the groove 35. Once the paper web is finally issued, the slider 70 falls into the groove 35 and moves over the rod 72, the head member 71 upwards such that it engages with its head in a recess 74 of the lever member 73. The rear end of the lever member 73 drops down, the opposite end is pushed up and raises a projection 75 on an arm 76 of the bracket 28 so that it dissolves the transport roller 31 and the pinch roller 27. This facilitates the insertion of a new paper web. As soon as the paper web raises the sliding element 70 again, the bracket 28 falls back into its original position, whereby possibly a spring element helps.

Finally, FIG. 11 shows the gear for the cutting function 80, which is arranged inside the transport roller 26 below a slot 32. The cutting function is shown without a knife, which typically has a serrated edge (sawtooth) to largely perforate the paper web for dispensing but not completely separate it. The cutting function 80 consists of the knife, the holder and a toothed element 83 which cooperates with a fixed axis 81 arranged teeth. As soon as the cutting function 80 reaches the teeth of the axle 81 during the rotation of the transport roller 31, the cutting function sets and perforates the paper web. After passing through the tooth elements 82 of the axis 81, the cutting function 80 falls back into its rest position, possibly supported by a spring mechanism.

FIG. 12 shows a guide element 60 with a centrally arranged securing pin 60a, the wheel rim 60b, the head part 60c and a running surface (guide part) 60d. The locking pin 60a ensures that only authentic paper material is introduced into the guide slot 23; after shearing off the pin 60a reuse of the guide member 60 is excluded.

In Figure 12a, the guide member 16 is shown in a side view. The head portion 60c with the ribs 60f is inserted into the cardboard core of a paper roll and holds the paper roll with the wedge-shaped projections 60g. The head portion 60 c is bounded by the plate 60 e, which runs along the inside of the guide shaft 23. The wheel rim 60b is located on the outside of the guide shaft 23, the running surface 60d, here in the form of two intersecting plates, runs along the edges of the guide shaft 23.

FIG. 12b shows the guide element 60 in a spatial representation, from which the ribbed structure of both the running surface 60d and the head part 60c emerges. Wedge-shaped projections 60g on the ribs 60f provide a tight fit in the paper roll. FIG. 12c shows the guide element 60 in plan view from the side of the pin 60a. The locking pin 60a is arranged centrally and has a relatively small diameter. It may be provided in the region of the wheel rim 60b with an additional groove, which facilitates shearing on a rib provided in the course of the guide shaft (see FIG. 12). The locking pin 60a is designed to operate the locking lever 63. The actuation of the locking lever 63 leads to the disengagement of the safety lever 62, which is taken from the rim 60b of the guide member 60. An interaction of the locking pin 60a with the locking lever 62 is not provided.

Figure 3 shows the guide shaft 23 for the paper roll from the inside with the receptacle 61, the locking lever 63, the locking lever 62 and the ribs 67 for shearing the locking pin 60a of the guide member 60. The receptacle 61 is designed so that the guide member 60 and easily can be properly inserted, so that the rim 60b on the outside of the guide shaft 23 and the disc 60e runs on the inside along. The running surface 60d moves on the running edge 68 of the guide shaft 23.

Once the guide member 60 is inserted into the receptacle 61, it takes with the locking pin 60 a the locking lever 63, which releases the safety lever 62 in the course of its movement. The guide member 60 takes with the rim 60b the locking lever 62 and enters the region of the ribs 67 which are arranged on the outside of the shaft 23 so that they pass the guide member 60 with the paper roll only after shearing the locking pin 60a. As a rule, the locking pin 60a already passes under the weight of the paper roll, which moves downwards on the inclined running surface 68 of the guide shaft 23. Possibly. must be helped by the operator with light pressure.

For orientation, the position of the transport roller 26 is shown. It should be noted that the locking pin 60a is arranged centrally in the illustration of Figure 12, but also a decentralized arrangement or other than a round cross section are possible. It is essential that shearing, which excludes reuse of the guide element. Incidentally, essential components of the guide element 60 are the holder 60c for the paper roll, the running surface 60d as well as on both sides of the running surface 60d of the rim 60b and the guide disk 60e.

Accordingly, the invention also relates to a paper dispenser with paper roll inserted, wherein the paper roll has a guide element with shear-off locking pin.

The paper dispenser according to the invention consists of a plurality of elements, which cooperate in each case, but which can also exercise in itself functions in other embodiments. Thus, the housing used according to the invention with the locking mechanism of the bottom unit or the lid can be used in each case with other dispenser units. The same applies to the peculiarities of the paper guide, the transmission with the slip clutch, the cutting element enclosed in the transport roller as well as the paper output and the release of the paper guide at the end of a paper web. Each of these elements may each be considered as a separate invention and may be made the subject of independent claims.

Claims

claims

1. Paper dispenser, in particular towel dispenser, for dispensing a paper web of predetermined length to a user, comprising a housing (1), a paper roll support (24, 25a, 25b) arranged in the housing, paper guide elements (27, 28), a transport roller (26), a button (21) arranged on the housing for triggering the paper transport via the transport roller (26) and a cutting function (80), characterized in that the button (21) via a lever (22b) with a drive (33, 34) for the transport roller (26) is connected, which on actuation of the button (21) causes the advance of the predetermined paper length, wherein the lever (22 b) via a slip clutch (43, 44, 45) acts on the drive (33, 34).

2. Paper dispenser according to claim 1, characterized in that the drive (33, 34) has a on the transport roller (26) arranged gear (33) and a toothed lever (34) via the slip clutch (43, 44, 45) and the lever (22b) is in communication with the button (21).

3. Paper dispenser according to one of the preceding claims, characterized in that the slip clutch has a clamping ring (43), a driving ring (44) and a cam ring (45) with rounded cams (46) in corresponding recesses (47) of the driving ring (46). 44) intervene.

4. Paper dispenser according to one of the preceding claims with a backstop (77, 78) on the drive (33, 34) opposite side of the transport roller (26).

5. Paper dispenser according to one of the preceding claims, characterized by a guide shaft (23) for a guide element (60) of a paper roll.

6. Paper dispenser according to claim 5, characterized in that it has in the region of the guide shaft (23) a safety lever (62), which upon insertion of the guide element (60) a paper roll a catch (60, 64a) picks up on a bearing roller ( 25a) of the paper roll acts.

7. Paper dispenser according to claim 6, characterized in that the securing lever (62) is pivotally mounted in the region of the guide shaft (23) and is carried along by the guide element (60) of a paper roll, wherein it pivots the detent (64), such that the Paper bearing roller (25a) is released.

8. Paper dispenser according to one of claims 6 to 7, characterized by a locking lever (63) for retaining a reserve paper roll in the guide shaft (23), wherein the locking lever (63) releases the reserve paper roll when the safety lever (62) is returned to its original position.

9. Paper dispenser according to one of the preceding claims, characterized by at least two bearing rollers (24, 25a, 25b) for the paper roll, wherein the bearing rollers (24, 25a, 25b) allow the unwinding of a paper web in the direction of the transport roller (26).

10. Paper dispenser according to claim 9, characterized in that the transport roller side two paper storage rollers (24, 25a, 25b) are arranged, which detect the edge region of a paper roll and of which on the side of the guide shaft (23) located lockable.

11. Paper dispenser according to one of the preceding claims, characterized in that the transport roller (26) with a pinch roller (27) is in contact, which presses a led up from the bearing rollers paper web against the transport roller and keeps under tension.

12. Paper dispenser according to one of the preceding claims, characterized in that the cutting function (80) in the transport roller (27) is arranged and acts on one or more slots (32) disposed therein on a paper web.

13. A paper dispenser according to claim 12, characterized in that the cutting function (80) has a possibly offset with teeth knife, which is arranged extendable in the transport roller (26) below one or more slots and on at a central axis (81) arranged teeth (82) which act on tooth elements (83) of the cutting function (80) is extendable.

14. Paper dispenser according to one of the preceding claims, characterized in that the transport roller (26) has a groove (35), above which a sliding element (36) runs, which falls in the absence of a paper web in the groove (35) and one at the Transport roller (26) arranged bracket (28) moves in such a way that it allows the entry of a new paper web.

15. Paper dispenser according to one of the preceding claims, characterized by an inserted paper roll with a guide element (60) which has a locking pin (60 a) which can be sheared off under devaluation of the guide element (60).

16. A paper dispenser according to claim 15, characterized in that the paper roll with the guide element (60) is mounted in a guide shaft (23), wherein the guide element (60) via its locking pin (60 a) a locking lever (63) triggers the access opened to the bearing rollers (24, 25a, 25b).

17. paper roll with a guide element (60), the one

A locking pin (60a) for use in a paper dispenser according to any one of claims 1 to 14.