Device for deploying bait in a shaft structure, operating tool and a system comprising the device and the operating tool

Abstract

Device for dispensing bait in a shaft structure (9), comprising a housing (3) with a bait chamber (5) and an opening (43) through which a pest can enter the bait chamber (5), characterized in that a U-shaped recess (11) for receiving a climbing iron (15) is formed in the housing (3) and the U-shaped recess (11) comprises a support (35) for the climbing iron (15), further comprising a fixing device (17) adjustable by means of an adjusting device (19) accessible from outside the housing (3), with which the climbing iron (15) is pressed against the support (35) in the mounted state.

Description

[0001] The invention relates to a device for dispensing bait in a shaft structure, comprising a housing with a bait chamber and an opening through which a pest can enter the bait chamber. The invention further relates to an actuating tool for installing the device and to a system comprising the bait dispensing device and the actuating tool.

[0002] To control pests, especially rodents like rats, in shafts, particularly sewage shafts, inspection shafts, or utility shafts, bait stations are used, which are positioned in the vertical shafts. Separate adapters, tension rings, or telescopic poles are typically used to position the bait stations.

[0003] A disadvantage of the currently used systems is that the installation, inspection, and restocking of the bait stations generally require significant financial and operational effort. For example, when using adapters, shaft-specific adapters are necessary, such as those for different shaft diameters. Furthermore, installation and inspection usually require entering the shaft, which should be avoided for occupational safety reasons, particularly due to potential gas hazards or the risk of falling, or, if unavoidable, involves the use of complex safety equipment. Existing systems that are attached to climbing irons tend to be unstable or to detach during backflow events, especially surges of water.

[0004] The object of the present invention was therefore to provide a device for dispensing bait that can be installed without entering the shaft and without additional attachments, while simultaneously ensuring high resistance to penetrating surge water.

[0005] The problem is solved by a device for dispensing bait in a shaft structure, comprising a housing with a bait chamber and an opening through which a pest can enter the bait chamber, wherein a U-shaped recess for receiving a climbing iron is formed in the housing and the recess includes a support for the climbing iron, further comprising a fixing device adjustable by means of an adjusting device accessible from outside the housing, with which the climbing iron is pressed against the support in the mounted state.

[0006] In the context of the present invention, a "shaft structure" is understood to be a shaft running at an angle of 60 to 90° to the horizontal, typically at an angle of 90°, particularly access shafts to supply or disposal channels, such as sewage pipes. These shaft structures generally contain rungs that serve as ladders for entering the respective channel. The design of the housing, with its U-shaped recess for receiving a rung, makes it possible to install the bait dispensing device within the shaft structure without additional components.

[0007] Especially when installed in sewage channels, installation in an access shaft has the advantage that the bait chamber remains dry even with fluctuating water levels in the actual channel.

[0008] The fixing device attaches the housing to the climbing iron, while the adjusting device serves to install the housing with an operating tool without the need to enter the shaft structure.

[0009] The fixing device is designed so that the housing can be securely attached to the crampon and will not detach from the crampon even under external force, for example from splashing water.

[0010] The fixing device can be any fixing device known to those skilled in the art that allows the housing to be fixed to the crampon by friction. Preferably, the fixing device comprises a plate that acts on the crampon from above, so that the crampon is clamped between the plate and the support on the housing when the device is mounted. In addition to friction-based fixing, positive-locking fixing is also possible. In this case, the plate and / or the support on the housing are shaped such that a recess in the shape of the crampon is formed, and the crampon is positively locked into the recess when the device is mounted.

[0011] The fixing device preferably comprises a plate pivotable about an axis, the axis being mounted on the housing. When the device is mounted on the climbing iron, the pivotable plate is pressed down onto the iron from above, so that the iron is clamped between the support and the pivotable plate. It is further advantageous if the pivotable plate is mounted such that an edge of the pivotable plate opposite the axis faces the opening of the recess for receiving the climbing iron. Such an orientation of the pivotable plate has the advantage that when the pivotable plate is pressed against the climbing iron, not only is a first force component exerted in the direction of the support, but also a second force component acts transversely to it. This second force component pulls the housing towards the shaft wall, thus stabilizing the position of the device in the shaft structure.

[0012] Particularly with climbing irons in the form of a U-shaped bar mounted in the shaft wall, it is further advantageous if the pivoting plate is mounted such that the edge of the pivoting axis opposite the main axis engages in the opening formed by the climbing iron and the shaft wall during installation. The pivoting plate can either be pivoted towards the support until it can no longer be pivoted due to contact with the climbing iron, or until the edge of the pivoting plate opposite the main axis touches the support and is pressed against it. In this way, an opening is created by the support, the U-shaped recess, and the pivoting plate, through which the climbing iron is guided when the bait delivery device is installed in the shaft structure.

[0013] According to the invention, the adjusting device is designed such that it can be actuated from outside the housing, in particular from above. For this purpose, the adjusting device preferably comprises a pressure element that acts from above onto the plate of the fixing device, in particular onto the pivotable plate. The pressure element can, for example, be a pin, a plate, or a sleeve. The adjustment can be effected, for example, by a lever with which the pin, plate, or sleeve is pressed onto the plate of the fixing device.

[0014] Alternatively, the adjusting device can comprise a threaded rod and a threaded sleeve as well as an adjusting head, wherein the adjusting head is connected to the threaded rod in such a way that when the adjusting head is turned in one direction, the combination of threaded rod and threaded sleeve lengthens and can thus press the plate of the fixing device, in particular the pivoting plate, against the crampon, and when the adjusting head is turned in the opposite direction, the combination of threaded rod and threaded sleeve shortens, so that the force acting on the plate of the fixing device and with which the fixing device is pressed against the crampon is reduced.To exert sufficient force on the plate of the fixing device, when using the threaded rod and threaded sleeve, it is necessary that the threaded rod, to which the adjusting head is connected, is attached to the housing in such a way that rotational movement is possible, but axial movement is prevented. For example, the threaded rod with the adjusting head can be guided through an opening in the housing and secured from the inside with a washer that is firmly attached to the threaded rod, for example by soldering or welding. To prevent the threaded sleeve from rotating when the adjusting head is turned, it has an outer profile that is guided in an opening in the housing by a corresponding inner profile.

[0015] It is particularly preferred, however, if the adjusting device comprises an adjusting head with a profiled rod and a sleeve, wherein the profiled rod has an outer profile that engages in an inner profile of the sleeve, and the sleeve further has an external thread that is rotatably received in an internal thread formed on the housing. By rotating the adjusting head and thus the profiled rod engaging in the sleeve, the sleeve is also set into rotation. Due to its engagement in the internal thread, the sleeve moves either towards or away from the plate of the fixing device when rotated, so that a force can be exerted on the plate of the fixing device in this way. The outer profile of the profiled rod and the inner profile of the sleeve can be any non-circular profile, so that when the profiled rod is rotated, the sleeve is also rotated.The profile bar can, for example, have a polygonal cross-section, such as with three, four, five, six, or more sides, or it can be oval. Preferably, the profile bar has a polygonal cross-section, in particular a square or hexagonal cross-section. Accordingly, the sleeve has an internal cross-section that corresponds to the cross-section of the profile bar, so that the sleeve can slide axially on the profile bar and rotate with it when the profile bar is rotated. The profile is preferably selected such that the profile bar and the sleeve do not tilt when rotational force is applied, but rather the sleeve is also rotated by the rotation of the profile bar and, due to the rotation, is moved upwards or downwards by the external thread running in the thread on the housing.

[0016] Regardless of whether the fixing device presses against the climbing iron or engages in the opening formed by the climbing iron and the shaft wall, it is particularly advantageous if the support has a non-slip surface. If the plate presses down on the climbing iron from above, it is also preferably designed with a non-slip surface.

[0017] “Anti-slip” within the meaning of the present invention means that the coefficient of friction is increased compared to the smooth surface of the U-shaped recess formed in the housing, thus making it more difficult for the device to slip and dispense bait.

[0018] To make the support and / or plate of the fixing device slip-resistant, the slip-resistant surface can be created using a profile, a slip-resistant coating, or a slip-resistant plate. If the slip-resistant surface is created using a profile, this can be integrated directly into the wall of the U-shaped recess in the housing that forms the support. Alternatively, a plate with a profile can be attached to the support for the crampon to serve as the slip-resistant plate.

[0019] If the profile is formed in the wall of the U-shaped recess in the housing that forms the bearing surface, it can be produced either by machining or pressing. Preferably, the profile is already formed during the manufacturing of the housing, for example in injection molding, if the housing is made of a plastic.

[0020] If a non-slip plate is applied to the wall of the U-shaped recess that forms the support for the crampon, it can be fastened in any way known to a person skilled in the art, for example, by positive locking or frictional locking. For instance, the non-slip plate can be glued, soldered, or welded to the wall of the U-shaped recess that forms the support for the crampon. Alternatively, the non-slip plate can also be screwed or riveted in place.

[0021] It is preferable to glue the non-slip plate onto the crampon support.

[0022] The profile, which is either embossed into the crampon support or embossed into or applied to the anti-slip plate, can be any profile with raised areas and depressions. Preferably, these areas run parallel to the entrance opening into the U-shaped depression. Raised areas and depressions running obliquely to the entrance opening, or raised areas or depressions that are wavy, zigzag-shaped, or circular, are also possible. It is particularly preferred if the profile has serrations.

[0023] As an alternative to a profile, the anti-slip plate can also have an elastomer coating or be made of an elastomer. Alternatively, instead of applying an elastomer coating to the anti-slip plate, it is also possible and preferred to apply the anti-slip coating directly to the support for the crampon formed on the housing. Suitable elastomers that can be applied as a coating or from which the anti-slip plate can be made include, for example, elastomers based on natural or synthetic rubber, also known as "rubber." Suitable synthetic rubbers include, for example, styrene-butadiene rubber, butadiene rubber, acrylonitrile butadiene rubber, butyl rubber, ethylene propylene diene monomer rubber, chloroprene rubber, and polyisoprene rubber.

[0024] The housing of the bait dispenser can be made from any suitable, waterproof, and corrosion-resistant material. Alternatively, a waterproof and corrosion-resistant coating can be applied. Preferably, the housing is made of metal or plastic. Suitable metals include aluminum or steel. Thermoplastics, which can be reinforced, are particularly suitable. Examples of suitable thermoplastics are polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), and polybutadiene terephthalate (PBT). If the plastic is reinforced, fibers can be used for reinforcement; these fibers can be short, long, or continuous. Suitable fibers include glass fibers, carbon fibers, aramid fibers, or natural fibers such as wool or hemp.In addition to fibers, powdered reinforcing materials, such as talc, can be added as reinforcing agents.

[0025] To prevent splashing or cascading water from entering the bait chamber, a labyrinthine passage with at least one deflection is preferably arranged between the opening through which a pest can enter the bait chamber and the bait chamber itself. The opening through which the pest, particularly a rodent such as a rat, can enter the device is preferably located on the underside or side of the housing. Especially during periods of high water flow, such as heavy rainfall, for which the existing sewer system is not designed, there is a risk that water will also enter the access shafts. To prevent water from entering the bait chamber even in this case, it is particularly preferred to position the opening through which the pest can enter the device on the underside of the housing.

[0026] Should water nevertheless penetrate through the opening, the labyrinth passage adjoining the opening is designed such that the incoming liquid, particularly the water, is prevented from advancing by at least one deflection, while still allowing passage for the pest. The deflection can be achieved, for example, by deflector plates inserted into the labyrinth passage. Alternatively, the labyrinth passage can be designed with a wave-like shape within the housing. If only one deflection is provided, it is designed, particularly when a deflector plate is used, so that the deflector plate is attached to the bottom of the labyrinth passage. With a wave-like design, however, it is advantageous if the labyrinth passage first runs downwards and then upwards again into the bait chamber.

[0027] If several deflection plates are provided, these are preferably attached alternately from above and below to the floor and ceiling of the labyrinth to create the labyrinth passage, with the distances between the deflection plates and the distance between the upper edge of a deflection plate attached to the floor and the ceiling and the distance between the lower edge of a deflection plate attached to the ceiling and the floor being chosen so that the pest can still pass through the labyrinth passage.

[0028] The ceiling of the labyrinth passage is preferably formed by the wall of the housing, which also serves as the support for the climbing iron in the U-shaped recess. If the labyrinth passage is designed to be wavy, it is advantageous to place a flat plate on top of the passage, which then forms the support for the climbing iron and thus the lower leg of the U-shaped recess.

[0029] To allow water that penetrates the labyrinth to drain away, it is further preferred that drainage openings be formed at the bottom of the labyrinth or, in the case of a wavy path, at the lowest points of the labyrinth. The diameter of the drainage openings is preferably chosen so that any liquid that penetrates can drain away without being hindered by surface tension, and at the same time be small enough that any pest that enters cannot become trapped in one of the drainage openings. Preferably, the drainage openings have a diameter of 1 to 3 mm.

[0030] To allow for inspection and, if necessary, replacement of the bait in an installed bait dispenser, it is preferable for the bait chamber to include a removable lid. It is particularly advantageous if the lid incorporates a bait holder. This allows the bait to be inserted into the bait chamber while suspended, preventing it from coming into contact with water that may collect at the bottom of the chamber, especially if water should enter. Furthermore, attaching the bait to a holder on the lid allows for easy bait replacement without having to reach inside the bait chamber.

[0031] In order to install the device for dispensing a bait without entering the shaft structure, an actuating tool is provided according to the invention, which includes a device for actuating the adjusting device as well as a device for holding the device for dispensing a bait.

[0032] The operating tool is used to install the bait deployment device inside the shaft without entering the shaft. Using the device holding mechanism, the device is lowered into the shaft and, at the desired position, slid over a climbing iron with its U-shaped recess. The adjusting mechanism is then actuated using the adjustment device, securely attaching the bait deployment device to the climbing iron with its fixing mechanism.

[0033] To position the device with the actuating tool within the shaft structure, suitable holding elements are attached to the device, which interact with the device's holding mechanism. For example, the device may have eyelets or hooks into which corresponding eyelets or hooks of the holding mechanism engage. An internal thread, into which the actuating tool is screwed, or an external thread, onto which the actuating tool is screwed, are also conceivable for the holding mechanism. In the case of an external thread on the device, the holding mechanism includes the corresponding internal thread, and in the case of an external thread, the holding mechanism includes the corresponding internal thread. However, for simple gripping and holding of the device, it is preferable if the holding mechanism includes at least one magnet.In this case, the holding elements on the device are either magnets themselves or a magnetizable material, such as iron, which interacts with the magnet of the holding device. Compared to a holding device with hooks and eyes or a thread, magnets have the advantage that precise positioning of the tool is generally not required, or that, with appropriate magnets in the device, the operating tool is automatically brought into the correct position by the magnetic force. This makes it particularly easy to "fish out" the device for dismantling and removal from the shaft structure.

[0034] To position the actuating tool correctly on the bait dispensing device, it is advantageous to include a positioning aid. For this purpose, at least one raised section on the housing is possible. Preferably, at least two raised sections are included, rotated at an angle of less than 180° to each other and positioned so that the actuating tool is in the correct position when it comes into contact with the at least two raised sections. If the actuating tool has a round contact surface, it is also possible to provide only one raised section that at least partially encloses the actuating tool when it is correctly positioned. Furthermore, it is also possible to provide only one closed raised section that completely encloses the actuating tool when it is positioned on the device.It is particularly advantageous if the raised section is designed in such a way that it positively encloses the actuating tool when the latter is positioned on the housing of the device.

[0035] When magnets are used, electromagnets can be employed on the actuating tool, for example. These are switched on while the device is being held and can be switched off once the device is positioned and mounted. Alternatively, permanent magnets can be used. In this case, the magnets are selected so that the magnetic force is sufficient to hold the device, but at the same time is not so great that the actuating tool can be removed again after the device has been mounted.

[0036] In order to bring the device into the correct position with the actuating tool and to hold it there, and to be able to actuate the fixing device after positioning, the actuating tool is designed in such a way that the device for actuating the adjusting device can actuate the adjusting knob while at the same time holding the device with the holding device.

[0037] If the adjusting device comprises an adjusting head, a threaded rod, and a threaded sleeve, the actuating tool is preferably designed to include a tubular shaft and a rotatable shaft guided within the shaft, the rotatable shaft comprising at its end the device for actuating the adjusting head. Depending on the position of the holding means on the device, the device for holding the device is arranged on the tubular shaft such that the device can be held with the actuating tool and the adjusting device can be operated simultaneously. It is particularly preferred if the holding means on the bait dispensing device are arranged to enclose the adjusting knob of the device. In this case, the device for holding the device is attached directly to the end of the tubular shaft.

[0038] To enable actuation of the adjusting head, it can, for example, be designed as a hexagon. Alternatively, the adjusting head can also have a slot or a Phillips head, an internal hexagon socket, or any other internal or external profile to which the actuating mechanism can engage. For example, with an external hexagon socket, the actuating mechanism has the corresponding internal hexagon socket; with an internal hexagon socket on the adjusting head, the corresponding external hexagon socket; with a slot, the corresponding blade; and with a Phillips head, the corresponding cross.

[0039] In addition to or alongside a geometric design of the adjusting head, it is also possible to equip the adjusting head with magnets and, accordingly, to also use magnets for actuating the adjustment mechanism. In this case, the adjustment mechanism is moved by turning the adjusting knob using magnetic force.

[0040] In addition to the device for holding the bait and the device for operating the adjustment mechanism, the operating tool may include means for opening the removable cover. In this way, one operating tool is sufficient for mounting, dismounting, checking, and, if necessary, replacing the bait. Alternatively, a separate operating tool may be used for opening and closing the removable cover, since the cover is usually removed from the already installed bait or taken off when the bait is not yet installed. Therefore, it is not necessary to hold the bait while opening and closing the cover.

[0041] An embodiment of the invention is shown in the figures and is explained in more detail in the following description.

[0042] They show: Fig. 1. A sectional view of a device mounted on a crampon for deploying bait; Fig. 2. A top view of the device mounted on a crampon for deploying bait; Fig. 3 a detailed view of an adjustment device with adjacent holding means; Fig. 4 A schematic representation of an actuating tool.

[0043] In the Fig. 1 and Fig. Figure 2 shows a device according to the invention for dispensing a bait in sectional view and in top view.

[0044] A device 1 for dispensing a bait comprises a housing 3. The housing 3 encloses a bait chamber 5 in which a bait 7 is contained.

[0045] For installation in a shaft structure 9, a U-shaped recess 11 is formed in the housing 3. For installation on a shaft wall 13, the housing 3 with the U-shaped recess 11 is slid over a climbing iron 15 fixed in the shaft wall 13. A fixing device 17, adjustable by an adjusting device 19, is included for attaching the device 1 for dispensing bait to the climbing iron.

[0046] In the embodiment shown here, the fixing device 17 comprises a plate 23 which is pivotable about an axis 21. The pivotable plate 23 is either pressed onto the climbing iron 15 or engages in an opening 25 enclosed by the climbing iron 15 and the shaft wall 13 by pressure exerted on the pivotable plate 23 by the adjusting device 19.

[0047] Alternatively, the adjusting device can also have a plate that can be moved parallel to the crampon 15 and which, when the device 1 is mounted, is pressed onto the crampon 15 to dispense a bait.

[0048] By an arrangement with a pivotable plate 23 which is pivotable about the axis 21, and in which one edge 26 of the pivotable plate 23 opposite the axis 21 points to the opening 28 of the U-shaped recess 11, a stable fixation of the device 1 for dispensing a bait on the climbing iron 15 is achieved, since in addition to the force component acting on the climbing iron, a force component also acts transversely to it, whereby the device 1 for dispensing a bait is pulled in the direction of the shaft wall 13.

[0049] The adjusting device 19 can be any device known to those skilled in the art with which the pivotable plate 23 can be pressed towards the climbing iron 15. Preferably, the adjusting device 19, as shown here, comprises an adjusting head 27 with a profiled rod 29 and a sleeve 31 with an external thread. The profile of the profiled rod 29 can be any profile, provided that the shape and size of the cross-sectional area of ​​the profiled rod 29 do not change in the axial direction. Any non-circular cross-sectional shape is suitable for the profiled rod 29, as this ensures that, with a corresponding opening cross-sectional area of ​​the sleeve 31, the sleeve 31 rotates when the profiled rod 29 is rotated.

[0050] To act on the pivotable plate 23, the sleeve includes an external thread that engages with an internal thread. The internal thread can be formed, for example, by a nut 33 attached to the housing 3. Alternatively, the internal thread can be formed directly in the housing 3, which requires a sufficiently large wall thickness or the formation of a flanged edge into which the internal thread is inserted.

[0051] To minimize slippage of the device 1 for dispensing bait on the climbing iron 15, it is further preferred that a support 35 formed by the U-shaped recess 11, on which the climbing iron 15 rests in the mounted state, be designed to be slip-resistant. For this purpose, it is possible, for example, to provide the support with a profile or, as shown here, to attach a plate 37 with a profile to the support 35. The profile can be any profile that reduces slippage of the device, particularly towards and away from the shaft wall 13. A suitable profile can, for example, be corrugated or, as shown here, have serrations.

[0052] To prevent the plate 37 with the profile from slipping, it is firmly connected to the support 35. Any suitable force-fit or form-fit connection can be used for this purpose, for example gluing, soldering, welding as form-fit connections or screwing or riveting as force-fit connections.

[0053] In addition to using the plate 27 with the profile, the profile can alternatively also be formed directly in the wall of the U-shaped recess 11 forming the support 35.

[0054] Alternatively or in addition to a profile, a coating made of a non-slip material or a plate made of a non-slip material, in particular an elastomer, can also be used.

[0055] To enable the bait 7 to be placed in the bait chamber 5 and to be inspected and, if necessary, exchanged or replaced even when the bait dispensing device 1 is installed in the shaft structure 9, the bait chamber 5 has a cover 39. In the embodiment shown here, the bait 7 is attached to the cover 39 by a retaining device 41. To prevent the cover from opening unintentionally, it can, for example, be screwed on or fitted with a bayonet fitting. With a suitable tool, the cover can then be opened even when the bait dispensing device 1 is installed in the shaft structure 9, without requiring personnel to enter the shaft structure. Furthermore, attaching the bait 7 to the cover 39 allows for simple and hygienic removal of the bait in a single operation during maintenance.

[0056] To allow a pest to enter the bait chamber 5, the device 1 for dispensing bait has an opening 43. In the embodiment shown here, this opening is located at the bottom of the housing 3, but can alternatively also be arranged on the side.

[0057] To prevent water, especially splashing or cascading water, from entering the bait chamber 5, a labyrinth passage 45 connects to the opening 43. In the embodiment shown here, the labyrinth passage 45 is formed by deflector plates 47 alternately attached to the floor and ceiling of the labyrinth passage 45. The deflector plates are dimensioned such that an opening large enough remains between the upper edge of a deflector plate 47 attached to the floor and the ceiling, and between the lower edge of a deflector plate 47 attached to the ceiling and the floor, allowing the pest, especially a rodent such as a rat, to enter the bait chamber 5 through the opening 43 and the labyrinth passage 45.

[0058] To mount the device 1 for dispensing bait without requiring operating personnel to enter the shaft, the device 1 comprises holding means 47 which interact with holding means on an actuating tool. The holding means 47 and the adjusting device 19 are shown in detail in top view in Fig. 3 shown.

[0059] The holding means 47 can, for example, be eyelets into which a hook on the actuating tool engages. However, it is preferred to provide magnets or a magnetizable material as holding means 47, which interacts with magnets on the actuating tool. In order to be able to position and subsequently fix the device 1 with only one actuating tool, it is further advantageous if, as in Fig. 3 shown, the holding means 47 enclose the adjusting head 27 of the adjusting device 19.

[0060] In order to rotate the adjusting head 27 with the actuating tool, it must be able to interact with a suitable device for actuating the adjusting mechanism. For this purpose, it is possible, for example, to provide the adjusting head 27 with an outer profile that can be enclosed by a corresponding inner profile on the actuating tool, or to provide an inner profile, for example a slot, a Phillips head, a hexagon socket or any other internal profile, into which a corresponding mating profile on the actuating tool engages.

[0061] It is also preferred here to equip the adjusting head 27 with magnets 49 which interact with corresponding magnets on the device for actuating the adjusting mechanism on the actuating tool. The use of magnets has the advantage that the adjusting head 27 can be rotated even if the actuating tool is not positioned exactly.

[0062] A suitable operating tool for holding the device for introducing a bait and for operating the adjustment mechanism is in Fig. 4 shown.

[0063] An actuating tool 51 comprises a device 53 for actuating the adjusting device and a device 55 for holding the device for dispensing a bait. In the embodiment shown here, the device 55 for holding the device comprises magnets 57 which interact with the magnets or magnetizable material introduced into the device 1 as holding means 47.

[0064] To enable easy and correct positioning of the actuating tool, it is advantageous if, as shown here, at least one projection 59 is formed on the housing 3 of the device 1 for dispensing a bait. Once the actuating tool is positioned correctly on the device 1, it rests against the projection 59 or is completely enclosed by it. If the actuating tool 51 has a polygonal bearing surface, this is preferably either completely enclosed by the projection 59 or the projection is designed such that the bearing surface rests against a projection on at least two sides or against separate projections, the projections in this case enclosing an angle other than 180° to define an exact position of the actuating tool 51.

[0065] The device 53 for actuating the adjustment mechanism is designed to interact with the adjusting head 27. For an adjusting head 27 with an outer profile, the device 53 for actuating the adjustment mechanism has a corresponding inner profile, and for an adjusting head 27 with an inner profile, the device 53 for actuating the adjustment mechanism has a corresponding outer profile that can interact with the other profile. However, it is preferred, as shown here, that magnets 49 are arranged in the adjusting head, which interact with corresponding magnets 1 in the device 53 for actuating the adjustment mechanism.

[0066] In order to install the device 1 for introducing a bait in the shaft structure 9 without entering the shaft structure 9, the actuating tool 51 comprises a shaft 63 in which a shaft 65 is rotatably mounted. To enable the adjustment device 19 to be operated with the actuating tool, the device 53 for actuating the adjustment device is attached to the end of the rotatable shaft 65.

[0067] In the embodiment shown here, in which the holding means 47 enclose the adjusting device 19, the corresponding device 55 for holding the device is arranged at the end of the shaft 63, so that the device 55 for holding the device encloses the device 53 for actuating the adjusting device 19.

[0068] To install the device in the shaft structure 9, the device is lowered into the shaft structure 9 to the desired depth using the actuating tool 51 and then fixed in place by actuating the device 53 to actuate the adjustment mechanism. The actuating tool 51 can then be detached from the bait dispensing device 1, and the bait dispensing device 1 is securely mounted on the climbing iron 15.

[0069] Accordingly, to remove the device 1 for dispensing bait, the actuating tool is positioned on the device 1 so that it is held by the device 55. Then, by turning the shaft 65, the adjusting head 29 is rotated so that the locking device is released. Afterwards, the device 1 can be pulled off the climbing iron 15 and removed from the shaft structure 9.

Claims

[1] Device for dispensing bait into a shaft structure (9), comprising a housing (3) with a bait chamber (5) and an opening (43) through which a pest can enter the bait chamber (5), characterized by , that a U-shaped recess (11) for receiving a crampon (15) is formed in the housing (3) and the U-shaped recess (11) comprises a support (35) for the crampon (15), further comprising a fixing device (17) adjustable by means of an adjusting device (19) accessible from outside the housing (3), with which the crampon (15) is pressed against the support (35) in the mounted state. [2] Device according to claim 1, characterized by , that the fixing device (17) comprises a plate (23) which can be moved in the direction of the support. [3] Device according to claim 2, characterized by , that the plate is a plate (23) that can be pivoted about an axis (21), wherein the axis (21) is mounted on the housing (3). [4] Device according to claim 3, characterized by , that the pivoting plate (23) is mounted such that an edge (26) of the pivoting plate (23) opposite the axis (21) points towards the opening (28) of the recess (11) for receiving the crampon (15). [5] Device according to any one of claims 1 to 4, characterized by , that the adjusting device (19) comprises an adjusting head (27) with a profile rod (29) and a sleeve (21), wherein the profile rod (29) has an outer profile which engages in an inner profile of the sleeve (31), and the sleeve (31) further comprises an external thread which is rotatably received in an internal thread formed on the housing (3). [6] Device according to any one of claims 1 to 5, characterized by that the support (35) and / or the swiveling plate (23) has a non-slip surface. [7] Device according to claim 6, characterized by, that the anti-slip surface is formed by a profile, an anti-slip coating or an anti-slip plate (37). [8] Device according to any one of claims 1 to 7, characterized by , that between the opening (43) through which a pest can enter the bait chamber (5) and the bait chamber (5) a labyrinth passage (45) with at least one deflection is arranged. [9] Device according to claim 8, characterized by , that the labyrinth passage (35) has drainage openings at the bottom. [10] Device according to any one of claims 1 to 9, characterized by , that the bait chamber (5) includes a removable lid (39). [11] Actuating tool for installing a device according to any one of claims 1 to 10 comprising a device (53) for actuating the adjusting device (19) and a device (55) for holding the device (1) for dispensing a bait. [12] Actuating tool according to claim 11, characterized by , that the device (55) for holding comprises at least one magnet (57). [13] Actuating tool according to claim 11 or 12, characterized by , that the actuating tool (51) comprises a tubular shaft (63) and a rotatable shaft (65) guided in the shaft (63), wherein the rotatable shaft (65) comprises at its end the device (53) for actuating the actuating head (27). [14] Actuating tool according to any one of claims 11 to 13, characterized by , that the actuating tool (51) includes means for opening the removable cover (39). [15] Pest control system comprising a device (1) according to any one of claims 1 to 10 and an actuating tool (51) according to any one of claims 11 to 14.

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