Nail setting device and kit for attaching to a nail setting device

Abstract

The invention relates to a nail-setting device, in particular a pneumatic nailer, with a base body (2) comprising a guide tube (3) for guiding a nail to be driven into a workpiece and a striking pin driving it, wherein the guide tube (3) extends between a front free end (4), through which the nail exits when driven into a workpiece, and a drive-side rear end, wherein the barrel (3) forms an internal firing channel (5) along a firing channel axis (X) and has an open front end section (6) in which it surrounds the firing channel (5) only over a partial circumferential section, wherein furthermore a guide element (17) is provided which is pivotable between a radially inner guide position with respect to the firing channel axis (X), in which it partially closes the open front end section (6) of the barrel (3) and guides a nail to be driven in and the firing pin driving it along the firing channel axis (X), and a radially outer deflection position, in which radial deflection of a nail to be driven in is possible.

Description

[0001] The present invention relates to a nail-setting device, in particular a pneumatic nailer, with a base body comprising a guide tube for guiding a nail to be driven into a workpiece and a firing pin driving the nail, wherein the guide tube extends between a front free end, through which the nail exits when driven into a workpiece, and a drive-side rear end, wherein the guide tube forms a firing channel on the inside along a firing channel axis.

[0002] Furthermore, the invention relates to a kit for attaching to such a nail-setting device, as well as a nail-setting device with such a kit.

[0003] Nails are among the oldest known fasteners in construction, used in building, shipbuilding, and defense, among other applications, primarily in connection with wood. A distinction is made between metal nails, usually iron or steel, and wooden nails, which have been increasingly used in recent years to join one or more wooden components. Traditionally, nails are driven into the material with hammers. This usually requires several hammer blows, and there is a risk of bending the nail if the head is not struck in line with the shank.

[0004] With increasing industrialization, production speed becomes ever more important for economic reasons. For this reason, tools have been developed that can drive nails into the components to be joined faster than with a hand-held hammer. These include, above all, nail-driving tools, which can be equipped with various drive concepts. Pneumatic nailers, which are typically operated at pressures of 5 to 6 bar, are of particular importance. Driving speeds of approximately 25 meters per second can be achieved with such pneumatic nailers.

[0005] Conventional pneumatic nailers have a main body that includes a guide tube for driving a nail into a workpiece and a firing pin that drives the nail. Particularly in modular pneumatic nailers, the main body can form a nose or be part of a nose, to which a compressed air supply is attached at the rear. The guide tube extends between a front free end, which is placed against the workpiece to drive the nail, and a rear drive end, which is fluidly connected to the compressed air supply, and forms a firing channel on its inner side.To drive in a nail, the firing pin is pressurized with compressed air by manual actuation of a trigger or by automated actuation, so that it moves at high speed in the firing channel towards the free end of the barrel and drives a nail into a workpiece.

[0006] A nail-setting device is known from US patent 8,123,096 B2. This device comprises a base body containing a barrel for guiding a nail to be driven into a workpiece and a firing pin that drives the nail. The barrel extends between a front free end, through which the nail exits when driven into the workpiece, and a drive-side rear end. On its inner side, the barrel forms a firing channel along a firing channel axis. A front end section of the barrel is open, meaning it surrounds the firing channel only over a partial circumferential portion. A guide element is provided for the flexible guidance of the nail being driven in; this guide element is pivotable between a radially inner guide position and a radially outer deflection position.

[0007] Other nail-setting devices are known from US 6 739 490 B1, US 10 350 741 B2 and EP 1 741 519 A1.

[0008] Pneumatic nailers of this type are particularly widespread for driving metal nails. In recent years, pneumatic nailers have also been increasingly used to drive wooden nails directly into components to be joined, without pre-drilling. To increase processing speeds, nails are connected to form rigid or flexible nail strips, allowing the nails to be fed into the firing channel automatically, one after the other.

[0009] When a metal nail strikes a hard spot in the workpiece being joined, the nail is compressed and deformed. To allow for radial deformation of the nail relative to the firing channel, the barrels of standard pneumatic nailers have an open front section, in which the barrel only partially surrounds the firing channel. Since wooden nails lack the ductility of metal nails, impact with a hard spot causes the material structure to break down. As a result, the wood fibers within the nail, under axial pressure from the firing pin, exert radial pressure on the barrel of the nailer due to their now misaligned structure. It has been found that this pressure can exceed the strength of the nailer's components, particularly the barrel and the firing pin.

[0010] Furthermore, when feeding the wooden nails from a nail strip, the problem arises that they slip relative to each other in the nail strip due to vibrations of the setting device, which can cause disturbances in the nail feed.

[0011] The object of the present invention is therefore to provide a nail-setting device and a kit for attaching it to a nail-setting device, which are characterized by particular reliability and ease of use and, in particular, avoid the aforementioned disadvantages.

[0012] The object underlying the invention, in a nail-setting device of the type mentioned above, wherein the barrel has an open front end section in which it surrounds the firing channel only over a partial circumferential section, wherein a guide element is provided which is pivotable about a pivot axis relative to the base body between a radially inner guide position with respect to the firing channel axis, in which it partially closes the open front end section of the barrel and guides a nail to be driven and the firing pin driving it along the firing channel axis, and a radially outer deflection position, in which radial deflection of the nail to be driven is possible, wherein the guide element has a linearly extending guide groove in an inner end face facing the firing channel axis for guiding a nail to be driven and a firing pin, is solved bythat the rear end of the guide groove opens into a central recess which completely penetrates the guide element radially to the shot channel axis and separates two rearwardly projecting, opposing webs.

[0013] Furthermore, the problem underlying the invention is solved by a kit for attachment to a nail-setting device, in particular to a pneumatic nailer, wherein the nail-setting device has a base body which comprises a guide tube for guiding a nail to be driven into a workpiece and a firing pin driving the nail, wherein the guide tube extends to a front free end, through which the nail exits when driven into a workpiece, and to a drive-side rear end, wherein the guide tube forms a firing channel on the inside along a firing channel axis and has a front open end channel section in which it surrounds the firing channel only over a partial circumferential section, wherein the kit comprises a base body which is designed to be attached to the base body of the nail-setting device, and a guide element.which is pivotable about a pivot axis relative to the base body between a guide position and an evasive position, so that it is suitable to partially close the open front end section of the barrel and to allow radial evasion of a driven nail, wherein the guide element has in an inner end face, which in the attached state points towards the firing channel, a linearly extending guide groove for guiding a driven nail and a firing pin, solved by the fact that a rear end of the guide groove opens into a central recess, which completely penetrates the guide element perpendicular to the inner end face and separates two rearwardly projecting, opposing webs.

[0014] The invention is based on the fundamental idea of ​​designing the partially open front end section of the firing channel in such a way that the radial forces occurring when a wooden nail collapses can be absorbed by a guide element functioning like a flap. This guide element is capable of directing the wooden nail being driven in and the firing pin towards the open end section of the firing channel, while simultaneously deflecting laterally when radial forces occur due to the collapsing nail, thus absorbing these radial forces.

[0015] In principle, it is conceivable to equip a nail-setting tool directly with such a guide element, which is pivotable relative to the base body. Using the kit according to the invention, it is also possible to retrofit existing nail-setting tools with such a guide element.

[0016] The nail-setting device according to the invention can also be of a modular design. In this case, it can, for example, include a device nose, which is at least partially formed by the base body. A device for generating and applying compressed air can be provided, functionally separate from this device nose. Connecting means can be provided for this purpose, enabling the base body to be connected to a device for applying compressed air. For example, a flange can be formed at the rear end of the base body for this purpose.

[0017] According to the invention, the guide element of the nail-setting device has a linearly extending guide groove in an inner end face facing the firing channel axis for guiding a nail to be driven in and a firing pin. Similarly, the guide element of a kit according to the invention can have a linearly extending guide groove in an inner end face facing the firing channel when the kit is attached to a nail-setting device. This guide groove preferably extends in the direction of the firing channel axis when the guide element is in its guide position, enabling stable guidance of a nail to be driven in, which slides along the guide element when driven into a workpiece.

[0018] To allow a collapsing, radially deforming nail to deflect, the rear end of the guide groove opens into a central recess that completely penetrates the guide element radially to the firing channel axis and separates two rearwardly projecting, opposing ribs. In particular, the central recess can serve to channel away wood fibers released when a nail collapses, allowing a subsequent nail to be driven in immediately without prior cleaning of the free end of the firing channel and the guide element. The width of the recess can be based on the diameter of the nail, in particular larger than the diameter of the nail to be driven in and / or approximately 6 mm. A rounded edge can be provided at the transition to the two rearwardly projecting ribs.

[0019] In a further embodiment, the guide groove can have a V-shaped cross-section, wherein the opening angle is particularly at least 60° and / or at most 120°, preferably about 90°. A V-shaped basic form creates a two-point support for a nail with a circular cross-section. With an opening angle of 90°, the support points are also offset from each other by an angle of 90° along the contour of the nail.

[0020] The inwardly facing end face can have additional surface sections besides the groove. Preferably, a flat end face section adjoins the guide groove on both sides, viewed from the center of the groove, with the two end face sections lying in the same plane. Further outwards, chamfered slopes can follow in the transition to the side surfaces bounding the guide element; these slopes can be inclined, for example, at an angle of 15° to the flat end face sections.

[0021] In a further embodiment of the guide element, the two ribs can project to different rearward distances. Lead-in contours can be provided on both sides of the guide groove at the transition to the ribs; these contours are preferably designed differently on each side of the guide groove. Tests have shown that the asymmetry of the rib design and the lead-in contours prevents the firing pin from impacting the guide element when it slips off the nail head and being damaged if the nail collapses. Due to the geometric asymmetry of the guide element in the area of ​​the ribs and the lead-in chamfers, damage to the various components can be reliably prevented.

[0022] Specifically, the entry contour on one side can be stepped and comprise a front entry chamfer and a rear entry chamfer inclined outwards relative to it. The front entry chamfer is preferably inclined at an angle of at least 20° and at most 40°, preferably 30°, to the inner end face, while the rear entry chamfer is inclined at an angle of at least 50° and at most 70°, preferably 60°, to the inner end face. Such a stepped entry contour on one side of the guide groove allows for the efficient absorption of high radial forces from a collapsing wooden nail. Simultaneously, the mechanical stresses on the firing pin and the barrel are minimized, and plastic deformation of the components is prevented.

[0023] For the same purpose, the transition between the front and rear lead-in chamfers can be rounded, preferably with a radius of approximately 4 millimeters. Such a rounding between the two lead-in chamfers prevents a sharp-edged transition and thus the risk of material jamming.

[0024] The front and rear leading edges, as well as a rounding formed between them, can also extend at least partially into the area of ​​the central recess and form a transition between the guide groove and the central recess.

[0025] In a further embodiment of the guide element, the entry contour on one side of the guide groove can be designed as a single-stage chamfer and inclined at an angle of at least 10° and at most 20°, preferably 15°, to the inner end face. Thus, one entry contour can be designed as a multi-stage chamfer, while the other is a single-stage chamfer. Such an asymmetry reliably prevents damage to the firing pin and other components if a nail collapses and forces acting radially to the firing channel axis occur.

[0026] In a further embodiment of this design, the bridge adjacent to the inlet phase can be rounded towards the rear and have the contour of a partial segment of a circular arc.

[0027] Preferably, in the nail-setting device according to the invention, the pivot axis is offset from the firing channel axis, so that the pivot axis and the firing channel axis do not intersect. Furthermore, the pivot axis can lie in a plane perpendicular to the firing channel axis. Similarly, the assembly according to the invention can be designed such that the pivot axis is offset from the firing channel axis, preferably in a plane perpendicular to the firing channel axis, when the assembly is attached to a nail-setting device.

[0028] To limit the movement of the guide element towards the guide position, stop devices can be provided. These preferably have a stop surface formed on the base body of the nail-setting device or on the base body of the kit, against which a corresponding counter surface, preferably located in a rear section of the guide element, can be brought into contact. In other words, the stop devices define the guide position, thus preventing any further movement of the guide element into the firing channel. The stop devices can be designed such that the guide element does not touch the opposite section of the barrel. Wood fibers can escape through such a gap between the guide element and the barrel in the event of a collapsing nail.

[0029] Furthermore, preloading means can be provided to preload the guide element towards its guiding position. Specifically, the preloading means can comprise a compression spring, in particular a helical compression spring, which is supported between the base body of the nail-setting tool, in particular a forward-projecting projection of the base body, or the base body of the kit, and a section of the guide element located axially in front of the pivot axis. This design is based on the consideration that the guide element should generally be in its guiding position and, after movement out of the guiding position due to a collapsing nail, should automatically return to the guiding position.Secondly, a preload in the direction of the guide position ensures that the nail being driven and the firing pin are guided, and that when radial forces occur, the guide element deflects in a defined manner against the restoring force of the compression spring. At the same time, this ensures that after the unsuccessful driving of a collapsed nail and the resulting movement of the guide element from its guide position, the guide element automatically returns to its guide position before the next nail is driven.

[0030] To prevent the compression spring from buckling, blind holes can be provided in the base of the nail setting tool, or the base of the kit and the guide element, into which the compression spring engages. Alternatively or additionally, if a helical compression spring is used, a guide pin, for example made of hard rubber, can be inserted inside it to prevent buckling.

[0031] The nail-setting device can be designed such that the barrel surrounds the firing channel in the front free end section over a circumferential angle of at least 160° and / or at most 200°, preferably over a circumferential angle of 180°.

[0032] The nail setting device can be designed in such a way that a guide rail extending parallel to and in front of the feed axis is provided to support the nails to be fed at their tip.

[0033] Similarly, the kit according to the invention can be provided with a guide rail which is designed such that, after the base body is attached to the nail setting device, it extends parallel to the feed axis and runs in front of it in order to support the nails to be fed at their tip.

[0034] These designs are based on the idea of ​​providing a rail projecting from the guide tube, against which the nails being fed can strike with their tips should they come loose from the nail strip. This prevents the nails from sliding forward out of the nail strip and blocking the feed of the nails into the guide channel.

[0035] The nail-setting device according to the invention is preferably designed such that the guide rail is formed integrally with the base body. Alternatively, it is conceivable that the guide rail is detachably attached to the base body, in particular by screws. Similarly, in a kit according to the invention, the guide rail can be formed integrally with the base body. Furthermore, it is advantageous that the guide rail is detachably attached to the base body, in particular by screws.

[0036] If the guide rail and the base body of the nail setting tool, or the guide rail and the base body of the kit, are designed as separate components, a rearward-facing contact surface can be provided at a front end of the base body for support, against which the guide rail rests. This fixes the position of the guide rail when it is screwed or otherwise attached, thus preventing it from slipping or rattling.

[0037] To improve the guidance of the nails to be fed along the feeding axis, a longitudinal groove extending in its longitudinal direction with a particularly V-shaped cross-section can be formed in the guide rail on the rearward-facing side, wherein the opening angle of the cross-section can be, for example, about 140°.

[0038] In a further embodiment, the guide rail can have a feed ramp at its end region radially outer to the firing channel axis, extending rearward to prevent the nails being fed in from jamming. In other words, a feed ramp is provided to forcefully return nails that have already slipped out of the nail strip to their correct position within the strip during feeding.

[0039] In a specific embodiment of the nail setting device according to the invention, the firing channel axis and the feed axis can form an acute angle to the rear, in particular an angle of at least 60° and / or at most 85°, preferably of about 75°.

[0040] In a further embodiment of the nail-setting device according to the invention, the guide element can be pivotably mounted directly on the guide rail. The guide rail can engage in the central recess of the guide element.

[0041] For pivotable mounting of the guide element on the guide rail, a pivot bolt can be provided in the area of ​​the central recess of the guide element, which passes through the guide element and the guide rail along the pivot axis. The pivot bolt can be secured against falling out by a locking element, for example, a retaining ring.

[0042] The central recess of the guide element and the guide rail can be designed such that the guide rail fills the central recess across its entire width, leaving virtually no gap between the guide rail and the two webs that laterally define the central recess. This prevents a gap from filling with wood fibers in the event of a collapsing nail, thus avoiding any interference with the pivoting movement of the guide element.

[0043] Similarly, in the kit according to the invention, the guide element can be pivotably mounted directly on the guide rail. As in the nail-setting device according to the invention, the guide rail can engage in the central recess of the guide element. Furthermore, a pivot bolt can be provided in the area of ​​the central recess of the guide element, which passes through the guide element and the guide rail in order to pivotally mount the guide element on the guide rail.

[0044] To attach the assembly according to the invention to a nail-setting tool, fastening means for attachment to a base body of the nail-setting tool can be provided on the base body of the assembly. Specifically, the fastening means can include threaded holes for screwing onto a nail-setting tool. To position the base body on a base body of the nail-setting tool, a contact surface can be formed on the base body, which is designed to rest against a corresponding opposing edge of the base body of the nail-setting tool.

[0045] The problem underlying the invention is further solved by a nail-setting device with a kit according to the invention.

[0046] For further details of the invention, reference is made to the dependent claims and the accompanying drawing. The drawing shows: Fig. 1 the device nose of a nail insertion device according to the present invention in a perspective view; Fig. 2 the device nose out Fig. 1 in a further perspective view; Fig. 3 the guide rail and part of the base body of the nail setting device Fig. 1 in a side view; Fig. 4 the guide rail and the part of the base body made of Fig. 3 in a view directed radially outwards with respect to the firing channel axis; Fig. 5 the guide rail and the part of the base body made of Fig. 3 in a rear view; Fig. 6. Remove the guide element of the nail setting device from the Fig. 1 in a perspective drawing; Fig. 7 the guide element from Fig. 6 in a view directed radially inwards with respect to the firing channel axis; Fig. 8 the guide element from Fig. 6 in a partially cutaway view; Fig. 9 the guide element from Fig. 6 in a view directed radially outwards with respect to the firing channel axis; Fig. 10 the guide element from Fig. 6 in another side view; Fig. 11 a kit according to the present invention for attachment to a nail-setting device in a perspective view; Fig. 12 the kit from Fig. 11 in another perspective view; Fig. 13 the device nose of a nail setting device with a kit of the Fig. 11 in a perspective view; and Fig. 14 the device nose out Fig. 13 in another perspective view.

[0047] The Fig. 1 and Fig. Figure 2 shows the device nose 1 of a nail-setting device according to the present invention for driving nails into workpieces to be joined.

[0048] The device nose 1 of the nail-setting device has a base body 2 formed as a cast part. This body comprises a guide tube 3 for guiding a nail to be driven into a workpiece and a firing pin (not shown) that drives the nail. The guide tube 3 extends between a front free end 4, through which the nail exits when driven into a workpiece, and a drive-side rear end of the base body 2. On its inner side, the guide tube 3 forms a firing channel 5 along a firing channel axis X. The guide tube 3 also has an open front end section 6, in which it surrounds the firing channel 5 only over a partial circumferential section of approximately 180°.

[0049] In order to supply the firing channel 5 with compressed air to drive the firing pin, the base body 2 is provided at its rear end with a flange 7, through which it is connected to a device (not shown) for supplying compressed air.

[0050] The device nose 1 of the nail setting device also has a feed device 8 for nails, which defines a feed axis Y. This forms an acute angle of approximately 75° with the firing channel axis X to the rear. Along the feed axis Y, nails oriented parallel to each other from a nail strip can be fed successively into the firing channel 5. Specifically, the feed device 8 comprises a door 10 pivotably connected to the base body 2 via a hinge 9. Fig. Figure 2 shows the door 10 in a closed state and securely locked by a locking element 11 that engages positively in a corresponding contour of the base body 2. If a nail strip is to be inserted into the feed device 8, the locking element 11 is removed from the area shown in the Fig. 2 in the position shown, the door 10 is moved forward against the restoring force of a tension spring 12, so that the door 10 can be opened and a strip of nails can be inserted into the feed device 8 before the door 10 is closed again.

[0051] In a front end region of the base body 2, a guide rail 14 is provided on a forward-projecting projection 13. This guide rail extends parallel to and in front of the feed axis Y to support the nails being fed into the firing channel at their tips. Specifically, the guide rail 14 is formed integrally with the base body 2.

[0052] In the Fig. Figures 3 to 5 show the guide rail 14 and the projection 13 of the base body 2 in detail. At its outer end region, radial to the firing channel axis X, the guide rail has an upwardly directed feed ramp 15 to return any nails that may have slipped in the nail strip to their intended position. On its rearward-facing side, towards the feed axis Y, a longitudinal groove 16 is formed along the length of the guide rail 14. This groove has a rectangular cross-section to support the nails being fed at their tip and to guide them along the feed axis Y.

[0053] A guide element 17 is pivotably mounted about a pivot axis Z on an end section of the guide rail 14 that is radially inward to the firing channel axis X. Specifically, a pivot bolt 18 is provided for this purpose, which passes through the guide element 17 and the guide rail 14 along the pivot axis Z and is secured against unintentional loosening by a retaining ring 19.

[0054] The guide element 17 is located between a radially inner guide position with respect to the firing channel axis X, as shown in Fig. 1 and Fig. 2 shown, and pivotable to a radially outer evasive position. In the guide position, the guide element 17 partially closes the open front end section 6 of the barrel 3 and guides a nail to be driven in and the firing pin driving it along the firing channel axis X. In the radially outer evasive position, radial evasive movement of a nail to be driven in is possible.

[0055] In the Fig. Figures 6 to 10 show the guide element 17 as a separate component in detail. On its inner end face 20, which points towards the firing channel axis X, the guide element 17 has a linearly extending guide groove 21 for guiding a nail to be driven in and the firing pin. The guide groove 21 has a V-shaped cross-section with an opening angle of 90°.

[0056] On both sides of the guide groove 21 – viewed from the center of the groove – a flat end-surface section 22 adjoins the guide groove 21, with the two end-surface sections 22 lying in one plane. Further outwards, in the transition to the side surfaces 23 that bound the guide element 17, chamfered slopes 24 follow, which are inclined at an angle of approximately 15° to the end-surface sections 22.

[0057] The rear end of the guide groove 21 opens into a central recess 25, which completely passes through the guide element 17 radially to the shot channel axis X and separates two rearwardly projecting, opposing webs 26, 27. The central recess 25 has a width of approximately 6.5 mm and is rounded at the transition to the webs 26, 27, as can be seen in particular in Fig. 7 is recognizable. The guide rail 14 engages flush in the central recess 25, so that there is no significant gap between the guide rail 14 and the webs 26, 27.

[0058] The two webs 26, 27 project backwards differently from the central recess 25, with the one in Fig. The left-hand bridge 26 projects less far to the rear than the right-hand bridge 27.

[0059] To prevent a nail from jamming during insertion, entry contours of different designs are provided on both sides of the guide groove 21 at the transition to the webs 26, 27. At the transition to the web 26, the entry contour is stepped and comprises a front entry chamfer 28, which is inclined at an angle of 30° to the inner end face, and a rear entry chamfer 29, inclined outwards relative to the front chamfer and at an angle of 60° to the inner end face. A rounded section 30, which in this case has a radius of 4 mm, is formed between the front entry chamfer 28 and the rear entry chamfer 29. The front entry chamfer 28, the rear entry chamfer 29, and the rounded section 30 arranged between them also form, at least partially, the transition from the guide groove 21 to the central recess 25.

[0060] On the other side, the inlet contour at the transition to the web 27 is formed as a single-stage inlet chamfer 31 and is inclined at an angle of 15° to the inner end face 20. Adjacent to the inlet chamfer 31, the web 27 is rounded towards the rear and has the contour of a segment of a circular arc.

[0061] As in Fig. 1 and Fig. As can be seen in Figure 2, stop devices are provided to limit the movement of the guide element 17 in the direction of the guide position. Specifically, the stop devices have a stop surface 32 formed on the base body 2, which is located behind and radially outside the pivot axis Z. A corresponding counter surface 33 of the guide element 17 rests against this stop surface.

[0062] Furthermore, preloading means are provided to preload the guide element 17 in the direction of its guide position. In this case, the preloading means comprise a helical compression spring 34, which is supported between the projection 13 of the base body 2 and a section of the guide element 17 located axially in front of the pivot axis Z. To prevent buckling of the helical compression spring 34, blind holes 35 are provided in the projection 13 of the base body 2 and in the guide element 17, into which the helical compression spring 34 engages.

[0063] The Fig. 11 and Fig. Figure 12 shows a kit 36 ​​according to the present invention for attachment to a nail-setting device; the Fig. 13 and Fig. Figure 14 shows a device nose 1 of a nail setting device with such a kit 36. The kit 36 ​​makes it possible to retrofit an existing nail setting device with a guide rail 14 for guiding the nails to be supplied and with a guide element 17 for guiding a nail to be driven in and a firing pin.

[0064] The kit 36 ​​comprises a base body 37, which is designed to be attached to the base body 2 of a device nose 1 of the nail-setting tool. Fastening means are provided for this purpose, which in this case include threaded bores 38 formed in the base body 37 for screwing it to the base body 2 of a device nose 1 of a nail-setting tool. For positioning the base body 37 relative to the base body 2 of a nail-setting tool, a contact surface 39 is formed on the base body 37, which, as shown in the Fig. 13 and Fig. 14 is shown, which can be brought into contact with a corresponding opposite edge 40 of the base body 2 of the device nose 1 of a nail setting device.

[0065] The base body 37 is fitted with the same projection 13 as the projection 13 of the base body 2 of the device nose 1 of a nail setting device. Fig. A guide rail 14 is provided at positions 1 to 10 to support the nails being fed forward. The guide rail 14 and the base body 37 are formed as a single unit.

[0066] Likewise, a guide element 17 is attached to the guide rail 14 in the same manner, as shown in the Fig. As shown in Figures 6 to 10, it is pivotably mounted between a guide position and an escape position, so that it is suitable to partially close the open front end section 6 of the running tube 3 and to allow radial escape of a nail to be driven in.

[0067] Both in the Fig. 1 and Fig. 2 device nose 1 of a nail setting device in which the guide rail 14 is attached directly to the base body 2, as well as in the nail setting device equipped with the inventive kit 36 ​​of the Fig. 13 and Fig. 14 wooden nails are successively fed from a strip of nails to the running tube 3 by the feeding device 8.

[0068] The guide rail 14 and the longitudinal groove 16 formed therein, as well as the feed ramp 15, ensure that the wooden nails contained in the nail strip cannot slip, or that slipped wooden nails return to their correct position relative to the nail strip, so that a reliable and trouble-free feeding of the nails to the firing channel 5 is achieved.

[0069] To drive a wooden nail inserted into the firing channel 5 into a workpiece, the front free end 4 of the barrel 3 is first placed onto the workpiece. Then, either manually or automatically, the firing channel 5 is pressurized with air, causing the firing pin to drive the wooden nail towards the front free end 4 of the barrel 3 along the firing channel axis X. The nail leaves the barrel 3 at a speed of approximately 25 m / s and penetrates the workpiece. During this process, the nail is guided by the guide element 17 in the area of ​​the open front end section 6 of the barrel 3.

[0070] If the nail does not encounter a hard spot in the workpiece, it penetrates the workpiece completely without any problems, without the guide element 17 being moved out of its guide position and without the nail exerting radial forces on other components of the nailing device, for example the firing pin or the guide element 17 or the guide tube 3.

[0071] If, however, the nail being driven encounters a hard spot in the workpiece, it frays due to its lack of ductility and collapses. This causes the nail cross-section to widen at its rear end, resulting in significant radial forces. In this case, the guide element 17 moves radially outwards against the preload force of the helical compression spring 34 relative to the firing channel axis X, thus enabling the nail to expand radially. Furthermore, the central recess 25 of the guide element 17 allows wood fibers from the nail to exit laterally from the firing channel 5. Additionally, the defined deflection of the guide element 17, particularly its asymmetrical design, catches the nail and the firing pin driving it without generating high mechanical stresses that could damage components of the device nose 1 of a nail-setting tool.

[0072] Even if a nail collapses upon impact with a hard spot in the workpiece, the guide element 17 automatically returns to its guide position due to the restoring force of the helical compression spring 34, allowing the next nail to be driven directly into the workpiece without any time-consuming clearing procedures. Because the guide rail 14 engages in the central recess 25 of the guide element 17 with virtually no play, wood fibers cannot become trapped and block the movement of the guide element 17 relative to the base body 2. Reference symbol list 1 device nose 2 basic shapes 3 running tube 4 front free end 5 shot channel 6 open front end section 7 flange 8 Feeding device 9 hinge 10 Door 11 Locking element 12 Tension spring 13 lead 14 Guide rail 15 Feed ramp 16 longitudinal groove 17 Guide element 18 pivot bolts 19 retaining ring 20 inner frontal surface 21 Guide groove 22 End face section 23 side surface 24 chamfered slope 25 central recess 26 Bridge 27 Bridge 28 front inlet ramp 29 rear inlet ramp 30 rounding 31 Inlet phase 32 Stop surface 33 Opposite surface 34 helical compression spring 35 blind hole 36 kit 37 Basic bodies 38 threaded holes 39 Contact area 40 opposite edge X shot channel axis Y feed axis Z-axis swivel axis

Claims

[1] Nail setting tool, in particular pneumatic nailer, with a base body (2) comprising a guide tube (3) for guiding a nail to be driven into a workpiece and a striking pin driving it, wherein the guide tube (3) extends between a front free end (4), through which the nail exits when driven into a workpiece, and a drive-side rear end, wherein the barrel (3) forms an internal firing channel (5) along a firing channel axis (X) and has an open front end section (6) in which it surrounds the firing channel (5) only over a partial circumferential section, wherein a guide element (17) is provided which is pivotable about a pivot axis (Z) relative to the base body (2) between a radially inner guide position with respect to the firing channel axis (X), in which it partially closes the open front end section (6) of the barrel (3) and guides a nail to be driven in and the firing pin driving it along the firing channel axis (X), and a radially outer deflection position, in which radial deflection of a nail to be driven in is possible, wherein the guide element (17) has a linearly extending guide groove (21) in an inner end face (20) pointing towards the firing channel axis (X) for guiding a nail to be driven in and a firing pin, characterized by, that the rear end of the guide groove (21) opens into a central recess (25) which completely penetrates the guide element (17) radially to the shot channel axis (X) and separates two rearwardly projecting, opposing webs (26, 27). [2] Nail setting device according to claim 1, characterized by , that the guide groove (21) has a V-shaped cross-section, wherein the opening angle is in particular at least 60° and / or at most 120°, preferably about 90°. [3] Nail setting device according to claim 1 or 2, characterized by , that the two bridges (26, 27) extend to the rear at different distances. [4] Nail setting device according to any one of the preceding claims, characterized by , that inlet contours are provided on both sides of the guide groove (21) in the transition to the webs (26, 27). [5] Nail setting device according to claim 4, characterized by , that the inlet contours on both sides of the guide groove (21) are formed differently. [6] Nail setting device according to claim 4 or claim 5, characterized by , that on one side the inlet contour is stepped and includes a front inlet slope (28) and a rear inlet slope (29) inclined outwards relative to this. [7] Nail setting device according to claim 6, characterized by , that the front inlet ramp (28) is inclined at an angle of at least 20° and at most 40°, preferably at 30° to the inner end face, and the rear inlet ramp (29) is inclined at an angle of at least 50° and at most 70°, preferably at 60° to the inner end face (20). [8] Nail setting device according to claim 6 or 7, characterized by , that the transition between the front and rear leading edge (28, 29) is rounded, the rounding (30) preferably having a radius of about 4 mm. [9] Nail setting device according to any one of claims 5 to 8, characterized by, that on one side of the guide groove (21) the entry contour is formed in one stage as an entry chamfer (31) and is inclined by an angle of at least 10° and at most 20°, preferably by 15° to the inner end face (20). [10] Nail setting device according to claim 9, characterized by , that the bridge (27) adjacent to the inlet chamfer (31) is rounded towards the rear and has the contour of a partial section of a circular arc. [11] Nail setting device according to any one of the preceding claims, characterized by , that the pivot axis (Z) is offset from the firing channel axis (X), wherein the pivot axis (Z) is preferably located in a plane perpendicular to the firing channel axis (X). [12] Nail setting device according to any one of the preceding claims, characterized by , that rigging devices are provided to limit the movement of the guide element (17) in the direction of the guide position. [13] Nail setting device according to claim 12, characterized by, that the lifting means have a stop surface (32) formed on the base body (2), to which a corresponding counter surface (33), which is located in particular in a rear section of the guide element (17) and is preferably formed by a web (27), can be brought into contact. [14] Nail setting device according to any one of the preceding claims, characterized by , that pretensioning means are provided to pretension the guide element (17) in the direction of its guide position. [15] Nail setting device according to claim 14, characterized by , that the preload means comprise a compression spring, in particular a helical compression spring (34), which is supported between the base body, in particular a forward-projecting projection (13) of the base body (2), and a section of the guide element (17) located axially in front of the pivot axis (Z). [16] Nail setting device according to claim 15, characterized by, that blind holes (35) are provided in the base body (2) and the guide element (17), into which the compression spring engages. [17] Nail setting device according to any one of the preceding claims, characterized by that the barrel (3) surrounds the firing channel (5) in the open front end section (6) over a circumferential angle of at least 160° and / or at most 200°, preferably over a circumferential angle of 180°. [18] Nail setting device according to one of the preceding claims, wherein the nail setting device has a feed device (8) for nails which defines a feed axis (Y) along which nails oriented parallel to each other are successively fed to the firing channel (5) in order to be driven into a workpiece, wherein the feed axis (Y) extends transversely to the firing channel axis (X), characterized by, that a guide rail (14) extending parallel to and in front of the feed axis (Y) is provided to support the nails to be fed at their tip. [19] Nail setting device according to claim 18, characterized by that the guide rail (14) is detachably attached to the base body (2), in particular screwed to it, or that the guide rail (14) is formed in one piece with the base body (2). [20] Nail setting device according to claim 18 or 19, characterized by , that in the guide rail (14) a longitudinal groove (16) extending in its longitudinal direction with a cross-section that is in particular V-shaped or rectangular is formed on the rearward-facing side. [21] Nail setting device according to one of claims 18 to 20, characterized by , that the guide rail (14) has a feed ramp (15) at its radially outer end area to the firing channel axis (X) towards the rear in order to avoid blocking of nails to be fed. [22] Nail setting device according to one of claims 18 to 21, characterized by that the firing channel axis (X) and the feed axis (Y) form an acute angle to the rear, in particular an angle of at least 60° and / or at most 85°, preferably of about 75°. [23] Nail setting device according to one of claims 18 to 22, characterized by , that the guide element (17) is pivotably mounted directly on the guide rail (14). [24] Nail setting device according to claim 23, characterized by , that the guide rail (14) engages in the central recess (25). [25] Nail setting device according to claim 24, characterized by , that in the area of ​​the recess (25) of the guide element (17) a pivot bolt (18) is provided which passes through the guide element (17) and the guide rail (14) along the pivot axis (Z) in order to pivot the guide element (17) on the guide rail (14). [26] Kit (36) for attaching to a nail-setting device, in particular to a pneumatic nailer, wherein the nail-setting device a base body (2) which includes a guide tube (3) for guiding a nail to be driven into a workpiece and a striking pin driving it, wherein the guide tube (3) extends between a front free end (4), through which the nail exits when driven into a workpiece, and a drive-side rear end, wherein the barrel (3) forms an internal firing channel (5) along a firing channel axis (X) and has an open front end section (6) in which it surrounds the firing channel (5) only over a partial circumferential section, wherein The kit (36) comprises a base body (37) designed to be attached to the base body (2) of the nail-setting device and a guide element (17) which is pivotable about a pivot axis (Z) relative to the base body (37) between a guide position and an escape position, so that it is suitable to partially close the open front end section (6) of the guide tube (3) and to allow radial escape of a nail to be driven in, wherein the guide element (17) has in an inner end face (20), which in the attached state points towards the firing channel (5), a linearly extending guide groove (21) for guiding a nail to be driven in and a firing pin, characterized by, that a rear end of the guide groove (21) opens into a central recess (25) which completely penetrates the guide element (17) perpendicular to the inner end face (20) and separates two rearwardly projecting, opposing webs (26, 27). [27] Kit (36) according to claim 26, characterized by , that the guide groove (21) has a V-shaped cross-section, wherein the opening angle is in particular at least 60° and / or at most 120°, preferably exactly 90°. [28] Kit (36) according to one of claims 26 or 27, characterized by , that the two bridges (26, 27) extend to the rear at different distances. [29] Kit (36) according to one of claims 26 to 28, characterized by , that on both sides of the guide groove (21) in the transition to the webs (26, 27) entry contours are provided to prevent a nail being driven in from becoming blocked. [30] Kit (36) according to claim 29, characterized by, that the inlet contours on both sides of the guide groove (21) are formed differently. [31] Kit (36) according to claim 29 or claim 30, characterized by , that on one side the inlet contour is stepped and includes a front inlet slope (28) and a rear inlet slope (29) inclined outwards relative to this. [32] Kit (36) according to claim 31, characterized by , that the front inlet slope (28) is inclined at an angle of at least 20° and at most 40°, preferably at 30° to the inner end face and the rear inlet slope (29) is inclined at an angle of at least 50° and at most 70°, preferably at 60° to the inner end face. [33] Kit (36) according to claim 31 or 32, characterized by , that the transition between the front and rear leading edge (28, 29) is rounded, the rounding (30) preferably having a radius of about 4 mm. [34] Kit (36) according to one of claims 30 to 33, characterized by , that on one side of the guide groove (21) the entry contour is formed in a single stage as an entry chamfer (31), which is inclined by an angle of at least 10° and at most 20°, preferably by 15° to the inner end face (20). [35] Kit (36) according to claim 34, characterized by , that the bridge (27) adjacent to the inlet chamfer (31) is rounded towards the rear and has the contour of a partial section of a circular arc. [36] Kit (36) according to one of claims 26 to 35, characterized by , that rigging devices are provided to limit the movement of the guide element (17) in the direction of the guide position. [37] Kit (36) according to claim 36, characterized by, that the lifting means have a stop surface (32) formed on the base body (37), against which a corresponding counter surface (33), which is preferably located in a rear section of the guide element (17) and is preferably formed by a web (27), can be brought into contact. [38] Kit (36) according to one of claims 26 to 37, characterized by , that pretensioning means are provided to pretension the guide element (17) in the direction of its guide position. [39] Kit (36) according to claim 38, characterized by , that the preload means comprise a compression spring, in particular a helical compression spring (34), which is supported between the base body (37) and a section of the guide element (17) located axially in front of the pivot axis (Z). [40] Kit (36) according to claim 39, characterized by , that blind holes (35) are provided in the base body (37) and the guide element (17) into which the compression spring engages. [41] Kit (36) according to any one of claims 26 to 40, characterized by , that the nail setting device has a feed device (8) for nails which defines a feed axis (Y) along which nails oriented parallel to each other are successively fed to the firing channel (5) in order to be driven into a workpiece, wherein the feed axis (Y) extends transversely to the firing channel axis (X) and the assembly (36) has a base body (37) which is designed to be attached to the base body (2) of the nail setting device (1) and a guide rail (14) is provided which is designed such that, after the base body (37) has been attached to the nail setting device, it extends parallel to the feed axis (Y) and runs in front of it to support the nails to be fed at their tip. [42] Kit (36) according to claim 41, characterized bythat the guide rail (14) is detachably attached to the base body (37), in particular screwed to it, or that the guide rail (14) is formed in one piece with the base body (37). [43] Kit (36) according to claim 41 or 42, characterized by , that in the guide rail (14) a longitudinal groove (16) extending in its longitudinal direction with a cross-section that is in particular V-shaped or rectangular is formed on the rearward-facing side. [44] Kit (36) according to one of claims 41 to 43, characterized by , that the guide rail (14) has a feed ramp (15) at its outer end area towards the rear in order to prevent blockage of nails to be fed. [45] Kit (36) according to one of claims 41 to 44, characterized by , that the guide element (17) is pivotably mounted directly on the guide rail (14). [46] Kit (36) according to claim 45, characterized by, that the guide rail (14) engages in the central recess (25). [47] Kit (36) according to claim 46, characterized by , that in the area of ​​the central recess (25) of the guide element (17) a pivot bolt (18) is provided which passes through the guide element (17) and the guide rail (14) in order to pivot the guide element (17) on the guide rail (14). [48] ​​Kit (36) according to any one of claims 26 to 47, characterized by , that fastening means for attachment to a base body (2) of a nail setting device are provided on the base body (37). [49] Kit (36) according to claim 48, characterized by , that the fasteners include threaded holes (38) for screwing onto a nail-setting device. [50] Nail setting device with a kit (36) according to any one of claims 26 to 49.

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