WO1984000280A1

WO1984000280A1 - Apparatus for sucking isolated objects, for example insects, flies, wasps, etc

Info

Publication number: WO1984000280A1
Application number: PCT/EP1983/000113
Authority: WO
Inventors: Jochen R Zoz
Original assignee: Jochen R Zoz
Priority date: 1982-07-07
Filing date: 1983-04-26
Publication date: 1984-02-02
Also published as: DE3225330A1; EP0113355A1

Abstract

A tubular casing (1) carries at the front a catching unit (2) and a stopping and releasing element (3) for a piston (4) which is pushed by a spring (5) against an end cap (6) bearing on the casing. A return spring (7) is arranged between the piston and the end cap, which end cap is provided with air inlet slots (36) for the pressure chamber (17). A cage (47) screwed in a connection sleeve (15) and provided with slots (53) on its contour extends in the suction chamber (16). The suction nozzle (48) provided with a unidirectional valve (56) is screwed at the end of the cage. When not in operation, the pressure cap (9) is positioned on the nozzle and acts, in the engagement position with the end cap (6), as a tension member for the piston (4) of which the tube (25) is engaged in the retainer ring (22) and is locked by a slight return motion. If the sucking nozzle (55) is sealingly applied to an object and the retainer ring (22) swings by pressure on the triggering lever (21), the piston (4) moves suddenly backwardly under the action of the spring (5). Thus the object is sucked by the nozzle (55) along the valve (56) until it enters the collector housing.

Description

Device for vacuuming individual objects, for example insects, flies, wasps and the like.

The invention relates to a device for suctioning off individual objects, for example insects, flies, wasps and the like, with a pulse suction device which has a pump element which can be moved by an energy store and triggered by a trigger, and a suction chamber which has a disposable Locking device is connected to a suction nozzle.

The use of normal vacuum cleaners is known for vacuuming small objects, such as flies, but this is time-consuming, cumbersome and often borrowed because of the large suction flow, since various substances can be carried away from the surroundings of the object. Because of the mostly long suction line, it often takes too long until the necessary vacuum is built up, so that the device must first be started and then moved towards the object. This also requires a lot of skill, since the pressure is only slowly built up locally, so a fly can easily escape.

It is known from US Pat. No. 4,074,458 that a suction tube which can be pivoted away on the housing and a built-in sieve cage which is closed on the inlet side by two deflectable valve flaps. Despite the low suction power to be applied, the flow again leads through a longer suction pipe, which further delays the build-up of the vacuum and thus the catching of insects and the like. difficult In a first known pulse suction device, a suction pulse is to be triggered in accordance with US Pat. No. 4,292,770, but the force required for the pulse must be applied directly by hand against a return spring. Therefore, despite the complex construction, there cannot be a sufficiently strong suction impulse.

Finally, DE-PS 270 634 shows a piston which can be moved in a cylindrical housing by means of a tension spring designed as a tension spring, the piston rod of which is designed as a suction pipe and can be connected to the lower suction chamber by a weight-loaded closing flap. This also serves as a collecting space and contains an insecticide. The device is tensioned by pushing in the suction pipe and held by a spring-loaded cross slide that engages in a circumferential groove of the suction pipe.

Due to the design of the lock, the device can only be used in a nearly vertical position with the suction pipe at the top. Since, during the triggering process, the negative pressure which arises in the suction space first has to propagate through the relatively long suction tube, the negative pressure can only slowly build up there. In addition, pushing the nozzle pipe presents considerable risk of injury.

Because of the limited suction power, it is also difficult to bring the suction nozzle sufficiently close to the object when it is extended. Finally, the suction pipe is extended by the entire piston stroke after the triggering process. With the intake manifold retracted, one must therefore estimate not only the direction but also the distance to the object very precisely. For this reason, the catch quota is extremely low there. In addition, the use of the suction space as a collecting space leads to constant pollution and to a reduction in operational safety.

OMH The invention is based on the suction device defined at the outset and pursues the task of making this device as compact and handy as possible in such a way that, with a reduced risk of danger, handling and the target process are facilitated in such a way that the object is abruptly as close as possible greater negative pressure is built up before the object can escape.

To achieve this object, according to the invention the suction nozzle, the suction space and an intermediate, separately emptied collecting space are assigned to a device housing enclosing the range of motion of the pump element in a tightly fitting manner.

It is based on the knowledge that z. B. can usually approach a fly with your finger up to about 1 cm before it flies away. A suction nozzle required for sucking up a fly has consistently smaller cross-sectional dimensions than the index finger, and one only needs to exert a short impulse-like suction blow in order to reliably lift the object from a soft surface even at the short distance. The volume of the surrounding medium to be suctioned off can then easily be limited in such a way that the substrate or any other adjacent soft materials are not impaired. It is thus easily possible to lift the fly from the surface of a cream cake, for example, without the cream becoming dirty or even deformed or entrained by the suction air flow. Suction energy and nozzle cross-section must somehow be related to the object to be suctioned. In the case of small objects such as insects, an inexpensive configuration is possible as a light hand-held device which can be pushed as a whole up to the object. Vibrations noticeable by the object can only occur when the suction flow has already started. Since the pump element is tightly shielded on all sides, there is no risk of injury, and there is no need to estimate larger distances during the aiming process. Contamination of the suction space is prevented by the emptying collecting space and thus the guidance of the pump element is improved. The captured or collected objects do not suffer any separate deformations and can therefore be released again later or can be used appropriately. Above all, however, the close combination of interlocking functional spaces ensures an abrupt build-up of the negative pressure at the suction nozzle.

Further features and advantages of the invention are set out in the subclaims and are explained in more detail in the subsequent explanation of an embodiment of the invention. Show it

Fig. 1 is a partially cut in the nozzle area

Side view of a suction device according to the invention,

2 is a partial view of this device in the area of the trigger seen from above in Fig. 1,

3 shows a longitudinal section through the suction device prepared for the tensioning process in the plane of FIG. 1,

4 shows a cross section along the line IV-IV in FIG. 3,

5 shows a longitudinal section corresponding to FIG. 3 through the tensioned device in two operating positions of the tensioning element, FIG. 6 shows a view of the nozzle from the left in FIG. 5, 7 shows a front view corresponding to FIG. 6 of a comparable nozzle tube with a trap closure, and FIG. 8 shows a longitudinal section through this nozzle along the line VIII-VIII in FIG. 7.

The supporting part of the suction device shown is a tubular housing 1, which carries a catch unit 2 on its front side and also a holding and triggering element 3 for a piston 4, which is pressed against an end cap 6 supported on the housing by a tension spring 5 designed as a helical compression spring becomes. Between this end cap and the piston a return spring 7, which is also designed as a compression spring, is attached. 1 in FIG. 1 denotes a nozzle cap and 9 denotes a partially conical stamp cap, which according to FIGS. 3 and 5 can optionally be attached to the end cap 6 as a pressure stamp on the outside.

The housing 1 has a rear cylinder part 11 serving as a pump cylinder for the piston 4, the free end of which is delimited by a narrow inner flange 12 which merges forwardly into a connecting piece 15 by means of an intermediate flange 13 via a cylinder extension 14 enclosing the tension spring 5 . The piston 4 divides the cylinder space into a front suction space 16 and a rear pressure space 17.

Close to the cylinder flange 13, the housing wall is penetrated by a radial shaft 18 with a rectangular cross-section, which extends outwards within a neck sleeve 19. Through this shaft, the multiply bent release lever 21 is passed through during assembly, which is connected in one piece to the retaining ring 22 of the holding and release element 3 designed as a stamped part. This element preferably also exists like the two springs 5, 7 made of spring steel, while the remaining tube parts are all made of an inexpensive and elastically deformable plastic such as PVC. The connecting piece between the release lever 21 and the retaining ring 22 is a web 23, which is sealed in the shaft 18 by the neck sleeve 19 and seals under elastic tension. increases. Starting from the radial plane of the web 23, the loaded release lever 21 is arranged so as to protrude obliquely outwards so that there is sufficient pivoting angle for the release process against the cylinder part 11,

The retaining ring 22 is also deflected toward the piston 4 by approximately 10 °. The inside diameter of its recess 24 is only slightly larger than the outside diameter of a pipe socket 25 of the piston serving as a retaining attachment. This pipe socket also has a conical insertion bevel 26 on the outside for the recess 24 of the retaining ring.

The pipe socket 25 extends from a radial central wall 27 of the piston, from which an inner cup part 28 and an outer ring flange 29 are also formed on the opposite side. While the inner part of the middle wall 27 itself forms an annular shoulder 31 for the tension spring 5, a support shoulder 32 for the return spring 7 is formed on the outside of the inner pot part 28. Two ring beads 33, 34 formed on the outside of the ring flange 29 and a resilient wedge-shaped tapered end lip 35 serve for guiding on the inside surface of the housing-cylinder part 11. The outside diameter of the parts 33 to 35 is only slightly larger than the inside diameter of the Inner flange 12 that the piston as a whole through elastic deformation through the rear opening of the cylinder

OP part 11 can be pressed.

In the same way, the end cap 6 is also used, whose ring flange 37 provided in the outer part with air outlet slots 36 also engages behind the inner flange 12 with two outer ring beads 38, 39. From the bottom 41 of the end cap 6, an annular connector 42 also projects to the bottom of the pot part 28. In this way, the end lip 35 is relieved of axial pressure forces.

The stamp cap 9 forms an outer truncated cone 43 and an inner cylinder flange 44 which, in the operating position FIG. 1, sits with an adhesive seat on the cylinder extension 14 and thereby shields the entire catching unit 2 from the outside. An inner bead 45 is formed on the free edge of the cylinder flange 44 and engages behind an annular bead 46 of the end cap 6 and thus forms an easily releasable snap-in connection.

The catching unit 2 essentially consists of a pot-shaped cage 47 with a short nozzle tube 48. The cage 47 is screwed into the connecting piece 15 until it rests against its ring flange 49. The ring flange 49 is connected to the base 51 by axial ribs 52, between which segment-shaped circumferential slots 53 are formed. The nozzle tube 48 is screwed into the ring flange 49 with a threaded shoulder 54, in which a valve flap 56 is articulated so resiliently at its suction end 55 that one end 57 is so resilient that the flap is normally so close to the narrow gap 58 opposite wall of the nozzle tube is held so that the objects to be caught can no longer escape. In contrast, the flap is pivoted to the articulation side by a suction air flow, so that objects sucked in are formed jointly by the parts 47, 48 of the catching unit 2

- ^Λ θ ____ Collection room 59 can enter. You stay in this

The collecting space is also included when the entire catch unit is removed from the connecting piece 15 by unscrewing the cage 47. Even with separate transport, the nozzle cap 8 shown in FIG. 1 can be put on for securing.

If you want to tension the device tensioned according to FIG. 3, you only need to press in the stamp cap 9 serving as a pressure stamp, which is expediently done by pressing the device captured on the housing with the stamp cap onto a table. The end cap 6 with the ring connection 42 pushes the piston 4 towards the catch unit 2, the tension spring 5 being compressed between the pipe connection 25 and the cage 47 until the tensioning end position in FIG. 5 is reached.

Shortly before reaching the end position shown in FIG. 5, the pipe socket 25, with its conical insertion bevel 26, threads into the recess 24 of the retaining ring 22, which is thereby pivoted slightly into position 221. Then the indentation force diminishes and the piston 4 is slightly moved back by the tension springs, the retaining ring 22 closes with the return movement approximately into its starting position with a constant increase in

Holding force clamping around the outer surface of the pipe socket 25. The suction space 16 has reached its smallest cross section.

When the end cap 6 is further relieved, it is moved back with the stamp cap 9 seated on it by the return spring 7 to the end position shown in broken lines in FIG. 5. The device is thus ready to be caught and can be guided slowly with one hand until the nozzle 55 is at the desired distance from the object.

O FI If one then presses the release lever 21, for example with the thumb, the retaining ring 22 is pivoted towards the radial plane until the clamping effect on the pipe socket 25 is canceled in the area of the position 221 and the piston 4 abruptly in by the tension spring 5 its initial position according to FIG. 3 is moved. The effective volume between the piston and the nozzle 55 is thereby brought to a multiple size. Since this takes place instantaneously while the suction space 16 is closed on all sides except for the nozzle 55, a strong suction pulse occurs almost immediately at the nozzle, which sucks in an air quantity corresponding to the entire displacement from the object area and deposits the object in the collecting space 59 .

With the existing volume of the collecting room more than twenty flies can be caught, which one u. U. later release again, as small animal feed or in other ways can use or eliminate. In order to dampen the impact, a wide-meshed cotton ball or the like can also be provided on the bottom of the cage 47. The flow resistance through the wall of the cage 47 and through the valve flap 56 is relatively small. The flow resistance from the pressure chamber 17 is also irrelevant, since the end cap 6 protrudes backwards from the cylinder part 11 during the suction stroke and its slots 36 establish the connection to the atmosphere. All parts that can be moved during the suction stroke, in particular the piston 4 and the tension spring 5, are permanently closed to the outside, so the risk of injury is largely avoided. Since the collection space is also sealed off from the suction space, the piston guide cannot be contaminated.

The suction resistance can be reduced even further by using a trap lock 61 according to FIGS. 7 and 8. Here, close behind the nozzle 55 on the inside side of the nozzle tube 48 individual plastic fibers 62 fastened with one end, while their free ends converge towards the nozzle axis 63. In this way, the remaining cross-section between the free ends can also be relatively small and better adapted to the objects to be caught.

The piston 4 or another pump element does not necessarily have to be moved in a straight line; a swiveling movement can also be advantageous. Instead of a metallic tension spring, a rubber, plastic or gas pressure spring can be used, and one can also store electrical energy, for example by means of a capacitor, and supply it to an electromagnet to be operated in pulsed fashion for driving the pump element. An injector or ejector can also be used to build up the aspirating blow.

The suction power is basically determined by the cubic capacity and stroke time. The shorter the path from the suction chamber and the larger the cross-sectional relationships of the pump element and nozzle, the greater the negative pressure effective at the nozzle. Usually here you come with ratios from twenty to twenty five, ^'but it may be appropriate for different purposes well to increase the ratio to fünf¬ thirty to over one hundred. This ratio can also be changed by replacing the nozzle tube, which, moreover, has to be adapted to the size of the objects to be captured. The gap or mesh widths of the cage 47 must also be adapted to these.

The surrounding medium is usually air, but can also be another gas or liquid. Otherwise, the invention is not limited to the suction of small objects, but can be adjusted if the advised also be used for much larger objects. In this way, quite diverse application possibilities open up.

Claims

Expectations

1. Device for vacuuming individual objects, for example

Insects, flies, wasps and the like, characterized by a pulse suction device, which has a pump element that can be loaded by an energy store and triggered by a trigger, and a suction chamber that is connected to a suction nozzle via a one-way blocking element that the suction nozzle (55), the suction space (16) and an interposed, emptied collecting space, separately attached to one another, are permanently assigned to a device housing (1) enclosing the range of motion of the pump element (26).

2. Apparatus according to claim 1, characterized by a holding device (3) attached to the housing (1) with a clamping ring (22) which, with circumferential play, projects a holding projection (25) of the ^* iinearly movable toward the suction nozzle

Pump element (4) clamps around and is pivotally mounted between the clamping position and release position (221) by a lever (22) acting as a trigger. in particular

3. Apparatus according to claim 2, characterized by a one-piece holding and triggering element (3) held in the housing (1) with a triggering lever (21) extending from the annular holding part (22).

4. Apparatus according to claim 3, characterized in that the release lever (21) of the holding and triggering element (3), in particular formed as a stamped part, protrudes outward by an approximately radial guide (18) in the housing wall and is bent to such an extent, that it can be inserted from the inside through the elastically deformable guide.

5. Apparatus according to claim 3 or 4, characterized in that the retaining ring (22) relative to the direction of insertion of the pump element (4) is biased obliquely into its gripping position for the holding projection (25).

6. Apparatus according to claim 5, characterized in that the release lever (21) by its in particular by a Hals¬ cuff (19) formed sealing clamping (19) in a shaft (18) of the housing made of elastically deformable material (1) biasing is held.

7. Device according to one of claims 1 to 6, characterized by a clamping device (5, 6) with at least one along the movement path of the pump element (4) on the housing (1) guided clamping member (6) and one between the housing (1) and pump element (4) acting tension spring (5).

8. Apparatus according to claim 7, characterized by an intermediate spring element (4) and tensioning element (6) attached return spring (7).

9. Apparatus according to claim 6, 7 or 8, characterized in that the clamping device has a pressure ram (9) which is guided in the tubular housing (1) for the clamping process.

10. Apparatus according to claim 9, characterized by a first clamping member (6) supported on the housing (1), to which the pressure stamp (9) is to be releasably attached as the second clamping member.

11. Apparatus according to claim 10, characterized by the formation of the pressure ram (9) as in particular a rotationally symmetrical ram cap, which can optionally be placed in front of the suction nozzle (55) or on the first clamping member (6).

12. Device according to one of claims 7 to 11, characterized ge indicates that at least one clamping member (6) is formed as a housing cap provided with air passage openings (36), which closes the housing (1) on the rear.

13. Device according to one of claims 7 to 12, characterized ge indicates that at least the support between the or the first clamping member (6) and the housing (1) is designed as a clip connection (12, 38, 39), such that that the tensioning element (6) can be introduced through the open rear end of the housing and can be supported on it by means of radial projections (38, 39).

14. Device according to one of claims 2 to 13, characterized in that the holding projection (25) is designed as a pipe socket and encloses the tension spring (5) formed as a helical compression spring.

15. Device according to one of claims 1 to 14, character- ized in that in a front opening of the housing as a whole removable a catch unit (2) with a front, the suction nozzle and the one-way locking member (56) auf¬ receivable Nozzle tube (48) and a rear cage (47) forming the collecting space (59) and having an air-permeable wall (53) is attached.

16. Apparatus according to claim 15, characterized in that the one-way locking member has at least one valve flap (56) loaded by elastic restoring closing force.

17. Apparatus according to claim 15, characterized in that the one-way locking member is designed as a fish trap closure (61) with individual, freely sloping inward, elastically deflectable fiber elements (62).

18. Apparatus according to claim 15, characterized in that the cage (47) is formed as a cylinder pot within the tension spring (5).