Screw magazine for a setting tool for the mechanical insertion of fasteners

Abstract

The invention relates to a screw magazine (10) for a setting device (1) for the mechanical screwing in of fasteners, each consisting of a screw (60) and a large-area load distribution plate (70) for the mechanical fixing of insulation materials and waterproofing membranes on flat roofs. These materials are held in their respective magazines and individually removed from them to be positioned in a common screwing axis (42). The screw magazine (10) consists of a pot-shaped container into which the screws (60), arranged on a belt (50), are inserted by receiving the belt (50) rolled up in the screw magazine (10). The invention is characterized in that the screw magazine (10) has a lowering base (14).The invention makes it possible to work on roof surfaces without disruption, as the transport of the screw belt and the removal of a screw are ensured by the precise transfer from the screw magazine to the singulation unit and into the screw-in axis. Because the magazine housing itself is statically arranged and no longer needs to be adjusted, the components between the singulation unit and the magazine housing are no longer subject to any change in position.

Description

[0001] The invention relates to a screw magazine for a setting device for the machine screwing in of fasteners according to the preamble of claim 1.

[0002] It is known from the prior art to mechanically secure insulation and sealing materials on flat roofs against wind suction forces. In contrast to securing with ballast or adhesives, mechanical fastening involves anchoring the roof structure to the load-bearing roof substrate using fastening elements.

[0003] For this purpose, mechanical setting tools are advantageously used, in which the fasteners are pre-loaded in larger quantities, separated, gathered into a screw-in shaft, and driven into the roof substrate. The mechanical fasteners each consist of a screw and a large load-distributing washer. During the setting process, the screw penetrates both the insulation material and the waterproofing membrane and anchors itself, tip first, in the load-bearing roof substrate by being set in motion by a screwdriver. This causes the screw to cut into the roof substrate, clamping the insulation and the waterproofing membrane between the roof substrate and the load-distributing washer located below the screw head. The roof structure is thus fixed to the roof substrate and secured against wind suction forces.The load-bearing roof substrate can be made of trapezoidal steel sheeting, wood or concrete material.

[0004] In order to store an appropriate quantity of screws and load distribution plates, the setting device is equipped with a screw magazine and a magazine for the load distribution plates, in addition to a screw screwdriver that can be raised and lowered.

[0005] Screw magazines are known from the prior art that are suitable for holding screws arranged on a belt. The belt holding the screws is wound into a spiral and inserted into the screw magazine. This requires that the belt be made of a sufficiently flexible material and simultaneously possess sufficient inherent rigidity to ensure that the screw is clamped securely despite the belt's elasticity.

[0006] EP 0 003 004 B1 describes a setting tool for processing fasteners, each consisting of a screw and a metallic load-distributing washer. Both components, the screw and the load-distributing washer, are pre-loaded separately. The known setting tool has a magazine for the load-distributing washer and a cup-shaped screw magazine for the screws, which are mounted on a belt.

[0007] Such a screw magazine is described in DE 10 2009 006 623 B3. Depending on its length, the filled screw belt is wound in an arc or spiral shape and inserted into the screw magazine. During the insertion process, the belt is pulled against the insertion axis, and one screw at a time is separated from the belt, while a load distribution plate is also dispensed from its magazine and advanced. The dispensing and singulation steps are triggered by the up-and-down movement of the screwdriver, which engages the screws and load distribution plates positioned one above the other along the insertion axis.

[0008] A functionally identical screw magazine is also described in DE 40 17 133 C1.

[0009] All screw magazines known from the prior art suffer from the disadvantage that the magazines must be adjusted along a height adjustment to accommodate the various screw lengths in the setting device. This adjustment also moves the outlet on the screw magazine for the screw belt relative to the singulation and feeding unit of the setting device, so that a smooth transition of the screw belt through the magazine outlet into the singulation unit is not consistently ensured.

[0010] If longer screws are used that protrude beyond the upper rim of the pot, they will tilt outwards towards the bottom of the pot. This creates the risk that the screw will not be transported smoothly from the magazine outlet and that even a slight tilt will disrupt the transition into the singulation and feeding unit.

[0011] Accordingly, it is an object of the present invention to create a screw magazine for a setting device by means of which efficient processing of the fasteners used is ensured with the highest possible screw tightness.

[0012] This problem is solved according to the invention by a screw magazine having the features of claim 1. Further features of the invention are described in the dependent claims.

[0013] According to the invention, a screw magazine for a setting device for the machine screwing in of fastening elements is proposed, consisting of a screw and a large-area load distribution plate for the mechanical fixing of insulation materials and sealing membranes on flat roofs, which are held in their respective magazines and individually removed from them in order to be positioned in a common screwing axis, wherein the screw magazine consists of a pot-shaped container into which the screws arranged on a belt are inserted by receiving the belt rolled up in the screw magazine.

[0014] The screw magazine according to the invention is characterized by the fact that the screw magazine has a bottom that can be raised and lowered.

[0015] The invention makes it possible to work on roof surfaces without disruption, as the transport of the screw belt and the removal of a screw are ensured by the precise transfer from the screw magazine to the singulation unit and into the screw-in axis. Because the magazine housing itself is statically arranged and no longer needs to be adjusted, the components between the singulation unit and the magazine housing are no longer subject to any change in position.

[0016] An advantageous embodiment of the invention provides that the base is enclosed by the pot-shaped container and can be raised and lowered within it. This gives the base edge guidance.

[0017] In a particularly advantageous embodiment of the invention, the base is penetrated and guided by a centering pin that rises vertically in the center of the pot. Together with the edge-side guidance provided by the container wall, this ensures virtually play-free upward and downward movement of the base, while simultaneously preventing jamming, as the base cannot tilt out of its horizontal position.

[0018] The invention provides a height grid arranged on the container, preferably on the outer wall of the container. This serves to manually fix the height-adjustable base of the magazine outside the receiving space of the pot-shaped container for the screws, so that the locking means used for this purpose cannot interfere with the belt transport in the receiving space of the container.

[0019] In a preferred embodiment of the invention, the height grid is formed by a grid strip with vertically stacked and spaced-apart grid holes. Alternatively, the grid strip can also be part of the container itself. The grid accommodates the most common screw lengths. An interchangeable strip has the advantage that the base can also be adjusted to less frequently occurring intermediate lengths.

[0020] To adjust the base, an outlet opening provided on the container is used, which also serves to guide the screw belt to the singulation device and screw-in axle. A locking head located on the base protrudes from the outlet opening and extends with an arm that reaches over the container wall and over the locking strip on the outer wall of the container. This allows easy access to adjust the base from outside the screw magazine.

[0021] The screw magazine can be made of metal, light metal, especially aluminum, or plastic. The dimensional stability is weakened in the area of ​​the outlet opening. To ensure that no deformation can occur in this area, the invention, in a further preferred embodiment, provides that a strut extends above the outlet opening. This acts as a stabilizer, thus preventing deformation of this sensitive area.

[0022] There are various ways to advantageously develop and further refine the teaching of the present invention. Reference should be made, on the one hand, to the dependent claims and, on the other hand, to the following explanation of an exemplary embodiment of the invention with reference to the drawings.

[0023] The drawings show: Fig. 1 a setting device with the screw magazine according to the invention in a perspective view, Fig. 2 a side view of the screw magazine according to the invention, Fig. 3 a rear view of the screw magazine according to the invention from the in Fig. 2 indicated direction III, Fig. 4 a side view of the screw magazine according to the invention from the in Fig. 3 indicated direction IV, Fig. 5 a front view of the screw magazine according to the invention from the in Fig. 4 indicated direction V, Fig. 6. A top view of the setting device with screw magazine, Fig. 7. An enlargement of the screw magazine in a perspective view, Fig. 8 a belt filled with screws and Fig. 9 a load distribution plate.

[0024] The Fig. Figure 1 shows a setting device 1. On a chassis 2 with two rollers 3 and 4, a receiving shaft 6 for the lifting device 30 and a singulation unit 5 for the screws are arranged. Furthermore, a magazine 7 with singulation unit 8 for load distribution plates and the screw magazine 10 according to the invention for the straps 50 ( Fig. 8) with the screws included therein. The lifting device 30 has a lifting column 32, at the free end of which two T-shaped handles 34 and 35 are arranged relative to the lifting column. These are attached on both sides to a bearing head 36. At the front, in the direction of travel, a clamping claw 40 is provided on the bearing head 36. A screwdriver (not shown here) is inserted into this clamping claw, the screw rod of which runs coaxially to the screw-in axis 42.

[0025] The screw magazine 10 has a cylindrical, pot-shaped container 12 and a height-adjustable base 14 (not shown here). The position of the base 14 is set by means of a height index 16 and fixed by the locking screw 17. The base 14 is pierced and guided by a centering pin 19 that rises vertically in the center of the container.

[0026] The Fig. Figures 2 to 8 show the screw magazine 10 according to the invention in different views, each in an enlarged representation.

[0027] The cylindrical container 12 of the screw magazine 10 has an outlet opening 20. To guide the inserted screw belt (not shown) so that it can be reliably fed to the singulation unit 5, the container 12 of the screw magazine 10 has a guide surface 21. The guide surface is formed by a deflection of the container wall at the free end of the outlet opening 20. The screw magazine 10 can be manufactured from a wide variety of materials. The dimensional stability of the container 12 is weakened in the area of ​​the outlet opening 20. To ensure that no deformation can occur in this area, a strut 15 extending over the outlet opening 20 is arranged here. This acts as a stabilizer, preventing deformation of this sensitive area.

[0028] In the Fig. 2 and Fig. Figure 7 shows the height grid 16 in detail. A grid strip 18 is arranged on the container 12 of the magazine. This can be integrated into the container wall, so that it is part of the container itself, or it can be placed on the container wall. The grid holes 22 or recesses arranged one above the other define the possible positions for the height-adjustable base 14.

[0029] The bottom section, which lies in the area of ​​the outlet opening 20 of the screw magazine 10, carries a locking head 25 with a locking screw 17. The locking head 25 protrudes from the outlet opening 20 at this point and has an arm 27 extending over the locking bar 18, which is penetrated by the locking screw 17 and engages in the locking bores 22 behind it at the desired position.

[0030] When short, coiled screws are to be processed, the base 14 is positioned further upwards. For longer screws, the base is moved further downwards. This ensures that the screw magazine 10 always remains in its fixed position, so that the transition area between the magazine and the singulation unit remains unchanged.

[0031] The Fig. Figure 8 shows a belt 50 with screws 60, as used in the screw magazine 10 according to the invention. The belt 50 has a substantially C-shaped cross-section and has an orthogonally projecting flange 52, 53 at each end of its web 51.

[0032] The belt is conventionally made of an elastic and flexible plastic, which, however, possesses sufficient inherent rigidity to clamp the screw shank 61 firmly within the notches 54 and 55 of the flanges 52, 53. The belt 50, filled with the screws 60, is inserted into the screw magazine 10 with the drill tips 62 facing forward, resting on the base 14. The end of the belt 50 is positioned at the singulation unit so that the screwing process can begin, and the belt is transported to ensure that the foremost screw is always separated from the belt.

[0033] The Fig.Figure 9 shows a load distribution plate 70 as it is used together with the screws 60. The load distribution plates 70 are stacked on top of each other in the magazine 7 provided for this purpose. A singulation device 8 separates the bottom load distribution plate 70 from the stack and transfers it to the screwing position. There, it is gripped by the also singulated and positioned screw as the lifting device moves downwards and is pressed onto the roof membrane during screwing. List of reference symbols 1 setting device 2 chassis 3 roller 4 roller 5 Singulation unit for screws 6. Receiving shaft for lifting device 7 Magazine for load distribution plates 8 singulation units for load distribution plates 10 screw magazine 12 containers of 10 14 floor out of 10 15 strut at 20 16 height grids of 10 / 14 17 Locking screw 18 grid strip 19 centering bolts 20 outlet openings of 10 / 12 21 guide surface at 10 / 12 22 grid holes 25 Grid head 27 arms out of 25 30 lifting device 32 Lifting column 34 Handle 35 Handle 36 Bearing head 40 clamping claw 42 Screw-in axle 50 belt 51 of 50 52 flange of 50 53 flange of 50 54 Cut in 52 55 Cut in 53 60 screws 61 screw shaft 62 drill bits out of 60 70 load distribution plates QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 0 003 004 B1

[0006] DE 10 2009 006 623 B3

[0007] DE 40 17 133 C1

[0008]

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