DE2757140A1 - Operator guard for drill press - has tubular sleeve attached to drill quill to support shield hinged for access to tool - Google Patents

Abstract

The guard is for protecting a drilling machine operator from a drill bit mounted in a vertical drilling machine. The guard comprises a multi-part shield which when operative surrounds the drill bit. A tubular protecting member is attached to the quill of the drilling machine and extends downwardly beneath the quill and within the shield. The shield is connected to the protecting member and suspended from it. The shield extends upwardly to a height at least equal to the lower end of the protecting member. At least one part of the shield is movable between its operative position and an inoperative position which allows access to the drill bit. The protecting member is pref. a split ring which is clamped around the quill and the shield is pref. formed of two half-shields of transparent plastics material attached by a slide to the protecting member.

Description

Protection device as well as with this

Equipped Drill The invention relates to drills and therefor provided protective devices.

According to the invention, a protective device for shielding the Operator created against a drill of a vertical drilling machine, the is characterized in that a multi-part shield is provided which in use the drill at least substantially encloses the shield has a tubular protective element which is attached to the spindle sleeve the Drill is attachable and down below the spindle sleeve and inside of the shield, and that connecting means are provided to the shield to connect with the protective element and hang on the latter, with the Shield extends upwards to a height at least equal to the lower one End of the protective element, and wherein further at least a part of the shield between its working position and a rest position offering access to the drill is.

Preferably, the connecting means allow a vertical movement of the Shield relative to the protective element.

It should be noted that the shield is still up extends to a height which is at least equal to the lower end of the protective element, even when the shield is in its lowest position with respect to the protective element occupies. So there is no horizontal gap between the shield and the protective element.

According to a preferred embodiment, the connecting means comprise a sliding guide that allows the shield to move freely vertically with respect to the protective element between an extreme upper and extreme lower position, with the weight of the shield acts as its bracing in the direction of the lowest layer.

In this case, according to the invention, a device for holding the sign in place be provided with respect to the protective element, for example to the shield in a to fix the raised position so that the drill invites to exchange.

According to a further preferred embodiment, comprise the Connecting means at least one articulated linkage that is pivotable between the Shield and the protective element is attached, the or each linkage having two links having their adjacent ends pivotable to each other and to their other ends Ends are pivotally attached to the protective element or the shield. It is advantageous to that each pivot connection is a screw connection and interlocking means has on the adjacent surfaces of the pivotally interconnected parts, the interlocking means for relative pivotal movement of the parts in both directions around the axis of the pivot connection between a plurality of Make intervention positions difficult, but not prevent them. Furthermore, according to the invention the interlocking means of each pivot connection on each of the adjacent ones Surfaces have a ring with alternating projections and recesses, wherein the projections of one ring engage in the recesses of the other ring. Another advantageous feature is that each pivot connection a compressible disc, for example made of neoprene, which has a relative Axial movement of the parts allowed during their relative pivoting movement and together with the screw connection, the parts are clamped against each other to avoid an undesired To prevent pivoting movement.

According to a preferred feature, the protective element has a slotted one Ring that can be clamped around the spindle sleeve of the drill.

Furthermore, the invention can be characterized in that the multi-part Shield has two half-shields of semicircular cross-section, of which the first half-shield, the lies on the side of the drill remote from the operator during operation, is attached to the protective element by the connecting means, while the second half-shield, which lies between the drill and the operator during operation, on the first half shield is attached.

Another inventive feature is that the second Half shield is hinged to the first half shield to pivot about a vertical Axis to be able to run into the rest position and thus access to To allow drill, and that a lock is provided to the second half-shield to hold releasably in its closed operating position.

Preferably, the second half shield is made of a material that allows the operator to see the drill through the material. The material is advantageously a transparent or tempered plastic or reinforced glass. Alternatively, there is the advantageous possibility that the Material is a steel mesh.

According to a development of the invention, the protective device characterized by a second shield and means for securing the second Shield in an overlapping arrangement with respect to the first shield, these means allow vertical movement of the second shield relative to the first shield.

Preferably the second shield is telescopic with respect to the first Shield arranged. In this case, the second shield can according to the invention within the first Shield arranged be. The second shield is also preferred a multi-part shield with at least a portion of the second shield between its operating position and a rest position is movable.

The invention also provides a drill that is characterized is by a protective device described above.

Further features and advantages of the invention emerge from the following Description of preferred exemplary embodiments in connection with the enclosed Drawing.

The drawing shows in: FIG. 1 a perspective front view a protection device for a drill, the shield of the protection device is in the lowered position while the front part of the shield is open Assumes rest position; Figure 2 is a rear perspective view of the protective device according to Figure 1. wherein the shield occupies the same position; Figure 3 is a perspective Front view of the protective device according to Figure 1, with the shield raised and the front part of the shield is in its closed operating position; FIG. 4 shows the protective device according to FIG. 1 attached to a drill, and although in a position before the start of the drilling process; Figure 5 the protective device according to Figure 1, attached to a drill, during the drilling process; figure 6 is a perspective view of a modified protective device; Figure 7 a further modified protection device, with the front part of the shield his assumes closed operating position; FIG. 8 the protective device according to FIG 7, the front part of the shield being in its open rest position; figure 9 is a side view of a further modified protective device; Figure 10 a Plan view of the protective device according to FIG. 9.

According to Figure 1 to 5, it is part of a customary industrial vertical drilling machine 10, in which a drill 11 in a chuck 12 is held above a vice 13 for receiving the workpiece. That Chuck 12 is attached to a spindle driven by an electric motor and the spindle has a spindle sleeve 14.

which is a non-rotating housing, which moves vertically with the drill when the latter is handled by a handle 15 is approached or removed from the workpiece to be drilled. The handle 15 can be rotated manually around a horizontal axis.

To shield the worker operating the drill is one Protective device 16 provided for the drill. The protection device includes a multi-part shield, which in the present exemplary embodiment consists of two shark shields 17 and 18 consists. The half shield 17, which is in operation on the by the operator far side of the drill is made of sheet metal and is on a vertical sliding guide 19 attached, which the shield 17, 18 with a protective element connects. In the present exemplary embodiment, the latter has a slotted one Ring 20, which is secured by a screw 21 around the lower area of the spindle sleeve 14 is clamped.

The other or front half shield 18, which is in operation between the Drill and the operator lies, is made of transparent plastic in order allow the operator to observe the drill while drilling, and is hinged to the half shield 17 along a vertical edge. This lets the half-shield 18 moves around a vertical axis into an open or rest position pivot to allow access to the drill bit so that the latter can be changed can be. If the front half-shield 18 takes its closed or operating position one, the two half-shields surround the drill. A resilient lock 22 is provided around the front half shield 18 in its operating position releasably to secure.

The sliding guide 19 comprises a ball bearing runner, the shield gives the opportunity to move freely up and down, between an extreme upper position according to Figure 3, an intermediate position according to Figure 5 and an extreme lower position according to Figure 1, 2 and 4. A clamping screw 23 is provided to the outer profile 19a of the sliding guide relative to the inner Define profile 19b and in this way the shield in relation to a stationary height to hold the slotted suspension ring 20, for example in the uppermost position of the shield while the drill 11 is being replaced.

The slotted suspension ring 20 extends downwardly below the spindle sleeve 14 of the drill and within the half-shields 17, 18. When The present embodiment forms the downward one section a skirt 24 which has a larger diameter than the upper one, the spindle sleeve Has adjacent section. However, in other embodiments, if this is allowed by the chuck 12, the downwardly extending portion the same diameter as the top section, or even a smaller diameter than own the upper section.

In any case, it is essential that the half-shields 17 and 18 extend up to a height that is at least equal to the slotted Ring, for all positions of the half-shields. In the present embodiment the half-shields overlap the ring.

In any case, there is no horizontal gap in this way between the upper end of the half-shields 17 and 18 and the lower end of the slotted Rings.

During a drilling process, the shield 17, 18 begins in its lowest Position. The drill 11 is then lowered until the lower end of the shield at Workpiece or, as shown in FIG. 5, on the one holding the workpiece Vise 13 engages. The shield then remains stationary during the rest of the time Downward movement of the drill and its corresponding upward movement. The operator is therefore completely shielded from the drill during the entire drilling process.

To allow the drill 11 to be replaced, the front half-shield 18 opened and, if desired, the shield by means of the clamping screw 23 in his clamped in the raised position.

FIG. 6 shows a modified protective device with a lower one Shield 25 on a ball bearing sliding guide 26 is attached, to perform telescopic sliding movements relative to the upper half-shields 17 and 18.

In the present embodiment, the lower shield forms a Transparent plastic tube attached to the inner sliding element 27 of the sliding guide is screwed, while the outer sliding element 28 with the inner surface of the Half shield 18 is spot welded. Here, too, the shield 25 is overlapping Arrangement with respect to the half-shields 17 and 18 held so that in all positions the shields there is no horizontal gap between them.

If desired, the lower shield 25 can have two half-shields similar to the have upper half-shields 17 and 18, the rear half-shield of the lower Shield is screwed to the inner sliding element 27, while the front half shield is connected to the rear half-shield via a vertical hinge in order to to be able to perform a pivoting movement into the rest position. Also will the front half shield by a resilient lock in its operating position secured.

Furthermore, the lower shield, regardless of whether it consists of a pipe or two half-shields are attached to its sliding guide in such a way that it is outside, not inside, of the upper shield. In this The case, the sliding guide for the lower shield goes back to back with the sliding guide 19 arranged for the upper shield or directly on the outer surface of the rear Half shield 17 of the upper shield attached parallel to the sliding guide 19.

Figures 7 and 8 show a further modified protective device, their fundamental difference compared to the protective devices described above is that between the slotted suspension ring 33 including its one-piece apron 40 and the multi-part Shield 34, 38 is not a sliding connection, but instead a pair of articulated rods 30 is located, which allow a lowering and lifting movement of the shield relative to the drill, to allow adaptation to drills of different lengths, during the Bohrens, however, resist such a relative movement.

Each articulated linkage 30 comprises two links 31 and 32, which at their adjacent ends pivotable with one another and pivotable at their other ends connected to the slotted suspension ring 33 or to the rear half-shield 34 are. Each pivot connection comprises a screw-nut connection 35 inclusive a neoprene disc 36 (see Figure 10) and engagement means at least on the adjacent surfaces of the two interconnected elements of the protective device, namely the link 31 and the ring 33 or the link 32 and the rear half-shield 34 or the members 31 and 32 of the associated linkage.

In the present exemplary embodiment, the engagement means comprise each pivot joint has two similar rings 37 with alternating projections and Recesses which are pressed into the adjacent surfaces. The protrusions of the ring on one surface engage in the recesses of the ring on the other surface a. As can be seen from the drawings, for practical reasons it is advantageous to in the present embodiment, both surfaces at each end of each link 31 and 32 with these rings 37 with alternating projections and recesses Mistake. The arrangement of the neoprene disc 36 serves both the respective To brace rings 37 into engagement of the projections and recesses, as well the relative rotation of the rings and thus of the interconnected elements of the Protection device to allow the axis of the respective screw connection 35.

The interlocking rings 37 and the disc 36 thus act in such a way that that they resist a relative rotation of the respective elements in both directions, but this is not the case prevent the rotation being fixed in positive, predetermined steps can be carried out.

As mentioned above, the half-shields 34 and 38 also remain in theirs lowest position in an overlapping arrangement with respect to the lower end of the apron 40. The front half-shield 38 is also on a vertical hinge on the rear half-shield 34 hinged to a pivoting movement in a rest position to be able to perform. The front half shield is held by a resilient lock 39 held in its actuated position. Otherwise exist in this embodiment both half shields made of transparent plastic.

Figures 9 and 10 show a protective device in its basic construction corresponds to that of Figures 7 and 8, but an additional front half shield 41 has.

The additional shield 41 is on the upper front half-shield 38 fastened by screw-nut connections 42 which pass through holes in the half-shield 48 and through vertical slots 43 in the extension shield or additional shield 41 go through it. The extension shield or additional shield 41 can be attached to this Way can be raised and lowered with respect to the half-shield 38.

If desired, the rear half shield 38 can also be provided with an extension shield 41 are provided. The arrangement of an extension shield 41 or more such Schildef offers the protective device the option of attaching itself to long drills adapt.

Furthermore, in all of the embodiments according to FIGS to 10 the possibility of the front and rear half-shields 38 and 34 under Use of the respective articulated linkage 30 separately on the slotted ring 33 to hang up. The invention is not intended to be in the specific details the described embodiments may be limited.

For example, there is the possibility that the main shield and / or the extension shield made of tempered or reinforced glass or a mesh screen whose size allows the operator to use the drill during of drilling can be seen, however, a penetration of oil slurry with chips through the Meshes prevented.

Furthermore, the resilient locking to hold the front half shield be replaced by a magnetic lock in the operating position.

In addition, there is the possibility that the main shield, the extension shield (if present) and the slotted ring or other protective component have a cross section deviating from the circular shape, for example a square one Cross-section.

For the sliding guide of the embodiment of Figure 1 to 5 or for one or both of the sliding guides of the embodiment according to FIG a runner with rollers instead of ball bearings can be provided, or else it will be on the Runner dispensed with, the sliding guide then only has two profile parts, one of which slides within the other.

Furthermore, the drilling machine can be an embodiment in which the drill is not in a chuck, but in a conical holding recess sits. In this case the split ring or other protective ring extends Element down below the spindle sleeve and shields the operator at least against the upper part of the holding device for the drill.

The individual embodiments of the protective device according to the above Description are suitable for attachment to a drill for shielding the operator against a drill. However, the protection device can be attached to a Drill also serve to hold the operator against a tap or shield a broach or reaming tool.

Use on a machine that only has represents a thread cutting machine or a broaching or reaming machine.

A major advantage of all of the embodiments described above is that there is no horizontal gap between the top of the main shield and the lower end of the slotted hanging ring or other protective element arises, regardless of the vertical position of the shield relative to the protective element.

Another advantage of each embodiment is that the protective element, for example the skirt or the lower portion of the slotted ring, the operator a protection at least against the upper Section of the chuck or other holding device for the drill, regardless of whether the front half-shield is in its closed operating position or takes its open rest position. At the same time, the protective element hinders Do not gain access to the chuck rotating ring or other morse taper slot Fastening devices when the drill is to be replaced. To this Suitable slots can also be provided in the protective element, provided that the latter down to a level below the rotating ring or morse taper slot extends.

Blank page

Claims (18)

PATENT CLAIMS Protective device for shielding the operator against a drill bit of a vertical drilling machine, with a multi-part shield, which in use the drill at least substantially encloses, with at least one Part of the shield between its working position and one providing access to the drill The rest position is movable, characterized in that the shield (16) is a tubular protective element (20, 24; 33, 40) which on the spindle sleeve (14) of the drill (10) can be fastened and is located downwards below the spindle sleeve and extends within the shield (17,18; 34, 38), and that connecting means (19; 30) are provided to connect the shield to the protective element and to the latter hang with the shield extending up to a height that is at least is the same as the lower end of the protective element. 2. Protection device according to claim 1, characterized in that that the connecting means (19; 30) a vertical movement of the shield (17,18; 34,38) relative to the protective element (20,24; 33,40) allow. 3. Protection device according to claim 2, characterized in that the connecting means comprise a sliding guide, which the shield (17,18) a free Vertical movement with respect to the protective element (20,24) between an extreme upper one and an extreme lower position, with the weight of the shield as its Tension in the direction of the lowest layer acts. 4. Protection device according to claim 3, characterized by a device (23) for holding the shield (17,18) with respect to the protective element (20,24). 5. Protection device according to claim 1 or 2, characterized in that that the connecting means comprise at least one articulated rod (30) which is pivotally attached between the shield (34,38) and the protective element (33,40), the or each linkage having two links (31,32) connected to their adjacent ones Ends pivotable to one another and with their other ends pivotable to the protective element or are attached to the shield. 6. Protection device according to claim 5, characterized in that each pivot connection has a screw connection (35) and interlocking means (37) on the adjacent surfaces of the pivotally connected parts (33, 31; 31.32; 32,34), the interlocking middle a relative pivoting movement of the parts in both directions about the axis of the Withstand screw connection between a plurality of engagement positions, the However, do not prevent pivoting movement. 7. Protection device according to claim 6, characterized in that the interlocking means of each pivot connection on each of the adjacent ones Surfaces have a ring (37) with alternating projections and recesses, wherein the projections of one ring engage in the recesses of the other ring. 8. Protection device according to claim 6 or 7, characterized in that that each pivot connection has a compressible disc (36) which has a relative Axial movement of the parts (33, 31; 31,32; 32,34) during their relative pivoting movement allow and, together with the screw connection (34), clamp the parts against one another, to resist unwanted pivoting movement. 9. Protection device according to one of claims 1 to 8, characterized in that that the protective element (20,24; 33,40) has a slotted ring (20; 33) which around the spindle sleeve (14) of the drill (10) can be clamped. 10. Protection device according to one of claims 1 to 9, characterized in that that the multi-part shield has two half-shields (17,18; 34,38), of which the first half-shield (17; 34) which, during operation, is on the remote from the operator page of the drill (11) through the connecting means (19; 30) is attached to the protective element (20,24; 33,40), while the second half-shield (18; 38), which lies between the drill and the operator during operation, on the first half shield is attached. 11. Protection device according to claim 10, characterized in that the second half shield (18; 38) is hinged to the first half shield (17; 34) is to pivot about a vertical axis into the rest position to be able to perform and thus to allow access to the drill (11), and that a lock (22) is provided to releasably hold the second half-shield to hold closed operating position. 12. Protection device according to claim 10 or 11, characterized in that that at least the second half-shield (18; 38) consists of a material that the The operator allows the drill (11) to be seen through the material. 13. Protection device according to claim 12, characterized in that the material is a transparent plastic. 14. Protection device according to one of claims 1 to 13, characterized by a second shield (25; 41) and by means (26; 42,43) for fastening the second shield in an overlapping arrangement with respect to the first shield (17,18; 34,38), said means moving the second shield vertically relative to the first Allow shield. 15. Protection device according to claim 14, characterized in that the second shield (25) arranged telescopically with respect to the first shield (17,18) is. 16. Protection device according to claim 15, characterized in that the second shield (25) is arranged within the first shield (17,18). 17. Protection device according to one of claims 14 to 16, characterized characterized in that the second shield is a multi-part shield, at least part of the second shield between its operative position and a rest position is movable. 18. Drill, characterized by a protective device according to one of claims 1 to 17.