Nail driving tool, movable guide element, stationary guide element, kit, base for such kit, system, and retrofitting system

Abstract

The present invention relates to a nail driving tool, in particular a compressed air nailer, with a main body (2), which comprises a running tube (3) for guiding a nail to be driven into a workpiece and a firing pin driving the nail, the running tube (3) extending between a front free end (4), where the nail exits as it is driven into a workpiece, and a drive-side rear end. The invention also relates to a movable guide element (17) and to a stationary guide element (42), which can be mounted selectively to the nail driving tool.

Claims

1. A movable guide element configured to be attached to a nail setting device, the nail setting device having a base body comprising a barrel for guiding a nail to be driven into a work piece and a firing pin driving the nail, the barrel extending between a front free end, via which the nail emerges when being driven into a workpiece, and a rear end on a drive side, wherein the barrel internally has a firing channel along a firing channel axis and has an open front end section in which the open front end section surrounds the firing channel over only a partial circumferential portion, or to a basic body for a kit for retrofitting a guide element to the nail setting device, in such a way that the movable guide element is moveable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, and a radially outer deflection position, in which radial deflection of the nail to be driven in is possible, about a pivot axis relative to the base body, wherein a linearly extending guide groove for guiding the nail to be driven in and the firing pin is in an inner end face facing the firing channel axis in an installed state, and wherein a rear end of the linearly extending guide groove opens into a central recess which completely penetrates the movable guide element from an inside to an outside and separates two rearwardly projecting, mutually opposite webs, wherein inlet contours are provided on both sides of the linearly extending guide groove in transition to the two webs, wherein on one side of the linearly extending guide groove the inlet contour is formed in a single step as an inlet chamfer and is inclined by an angle of at least 10 and at most 20 to the inner end face.

2. An arrangement, comprising: a nail setting device including a base body comprising a barrel for guiding a nail to be driven into a work piece and a firing pin driving the nail, the barrel extending between a front free end, via which a nail emerges when being driven into a work piece, and a rear end of a drive side, the barrel internally has a firing channel axis and has an open front end section in which the open front end section surrounds the firing channel over only in partial circumferential portion; and a movable guide element according to claim 1 attached thereto, such that the movable guide element is movable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the front end section of the barrel and guides a firing pin driving a nail along the firing channel axis, and a radially outer deflection position in which radial deflection of a nail to be driven in is possible, about a pivot axis relative to the base body.

3. A kit for retrofitting a guide element to a nail setting tool, the kit comprising a basic body and a movable guide element according to claim 1 attached thereto, such that the movable guide element can be pivoted about a pivot axis relative to the basic body between a guide position and a deflection position so as to be adapted to partially close the open front end portion of the barrel of a nail setting device and to allow radial deflection of a nail to be driven.

4. A nail setting device including a base body, the base body comprising a barrel for guiding a nail to be driven into a workpiece and a firing pin driving the nail, the barrel extending between a front free end, via which a nail emerges when being driven into a workpiece, and a rear end on a drive side, wherein the barrel internally forms a firing channel along a firing channel axis and has an open front end section, in which the open front end section surrounds the firing channel over only a partial circumferential portion, with a kit according to claim 3 attached thereto.

5. A system, comprising: a nail setting device having a base body, which comprises a barrel for guiding a nail to be driven into a work piece and a firing pin driving the nail, the barrel extending between a front free end, via which the nail emerges when being driven into a workpiece, and a rear end on a drive side, wherein the barrel internally forms a firing channel along a firing channel axis and has an open front end section in which the open front end section surrounds a firing channel over only a partial circumferential portion, a movable guide element according to claim 1, attachable to the nail setting device in such a way that the nail setting device is movable between a radially inner guide position relative to the firing channel axis, in which the nail setting device partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, and a radially outer deflection position, in which radial deflection of a nail to be driven in is possible, about a pivot axis relative to the base body of the nail setting device, and a stationary guide element, which is immovably attachable to the nail setting device in such a way that the stationary guide element at least partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving along the firing channel axis, such that a user may selectively detachably attach the movable guide element or the stationary guide element to the nail setting device.

6. A retrofit system, comprising: a basic body; a movable guide element according to claim 1, attachable to the basic body in such a way that the movable guide element is moveable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, a radially outer deflection position, in which radial reflection of the nail to be driven in is possible, about a pivot axis relative to the base body of a nail setting device; and a stationary guide element, which is immovably attachable to the basic body in such a way that the stationary guide element at least partially closes the open front end section of the barrel and guides the nail to be driven in and the firing pin driving the nail along the firing channel axis, wherein the movable guide element or the stationary guide element selectively detachably attachable to the basic body.

7. A movable guide element, configured to be attached to a nail setting device, the nail setting device having a base body, comprising a barrel for guiding a nail to be driven into a work piece and firing pin driving the nail, the barrel extending between a front free end, via which the nail emerges when being driven into a workpiece, and a rear end on a drive side, wherein the barrel internally has a firing channel along a firing channel axis and has an open front end section in which the open front end section surrounds the firing channel over only a partial circumferential portion, or to a basic body for a kit for retrofitting a guide element to the nail setting device, in such a way that the movable guide element is moveable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, and a radially outer deflection position, in which radial deflection of the nail to be driven in is possible, about a pivot axis relative to the base body, wherein a linearly extending guide groove for guiding the nail to be driven in and the firing pin is in an inner end face facing the firing channel axis in an installed state, and wherein the rear end of the linearly extending guide groove opens into a central recess which completely penetrates the movable guide element from an inside to an outside and separates two rearwardly projecting, mutually opposite webs, wherein inlet contours are provided on both sides of the linearly extending guide groove in transition to the webs, wherein on one side of the linearly extending guide groove to inlet contour is stepped and comprises a front inlet slope and a rear inlet slope inclined outwardly relative thereto, and wherein the front inlet slope is inclined by an angle of at least 20 and at most 40 to the inner end face, and the rear inlet slope is inclined by an angle of at least 50 and at most 70 to the inner end face.

8. An arrangement, comprising: a nail setting device including a base body comprising a barrel for guiding a nail to be driven into a work piece and a firing pin driving the nail, the barrel extending between a front free end, via which a nail emerges when being driven into a work piece, and a rear end of a drive side, the barrel internally has a firing channel axis and has an open front end section in which the open front end section surrounds the firing channel over only in partial circumferential portion; and a movable guide element according to claim 7 attached thereto, such that the movable guide element is movable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the front end section of the barrel and guides a firing pin driving a nail along the firing channel axis, and a radially outer deflection position in which radial deflection of a nail to be driven in is possible, about a pivot axis relative to the base body.

9. A kit for retrofitting a guide element to a nail setting tool, the kit comprising a basic body and a movable guide element according to claim 7 attached thereto, such that the movable guide element can be pivoted about a pivot axis relative to the basic body between a guide position and a deflection position so as to be adapted to partially close the open front end portion of the barrel of a nail setting device and to allow radial deflection of a nail to be driven.

10. A system, comprising: a nail setting device having a base body, which comprises a barrel for guiding a nail to be driven into a work piece and a firing pin driving the nail, the barrel extending between a front free end, via which the nail emerges when being driven into a workpiece, and a rear end on a drive side, wherein the barrel internally forms a firing channel along a firing channel axis and has an open front end section in which the open front end section surrounds a firing channel over only a partial circumferential portion, a movable guide element according to claim 7, attachable to the nail setting device in such a way that the nail setting device is movable between a radially inner guide position relative to the firing channel axis, in which the nail setting device partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, and a radially outer deflection position, in which radial deflection of a nail to be driven in is possible, about a pivot axis relative to the base body of the nail setting device, and a stationary guide element, which is immovably attachable to the nail setting device in such a way that the stationary guide element at least partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving along the firing channel axis, such that a user may selectively detachably attach the movable guide element or the stationary guide element to the nail setting device.

11. A retrofit system, comprising: a basic body; a movable guide element according to claim 7, attachable to the basic body in such a way that the movable guide element is moveable between a radially inner guide position relative to the firing channel axis, in which the movable guide element partially closes the open front end section of the barrel and guides a nail to be driven in and the firing pin driving the nail along the firing channel axis, a radially outer deflection position, in which radial reflection of the nail to be driven in is possible, about a pivot axis relative to the base body of a nail setting device; and a stationary guide element, which is immovably attachable to the basic body in such a way that the stationary guide element at least partially closes the open front end section of the barrel and guides the nail to be driven in and the firing pin driving the nail along the firing channel axis, wherein the movable guide element or the stationary guide element selectively detachably attachable to the basic body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) For further embodiments of the invention, reference is made to the subclaims, as well as to the accompanying drawing. In the drawings show:

(2) FIG. 1 an arrangement according to the invention with a device nose of a nail setting device in a perspective view with a mounted movable guide element;

(3) FIG. 2 a further perspective view of the device nose shown in FIG. 1;

(4) FIG. 3 a side view of the guide rail and part of the base body of the nail setting device shown in FIG. 1;

(5) FIG. 4 the guide rail and the part of the base body from FIG. 3 in a view pointing radially outward with respect to the firing channel axis;

(6) FIG. 5 a rear view of the guide rail and the part of the base body shown in FIG. 3;

(7) FIG. 6 a perspective view of the movable guide element of the arrangement shown in FIG. 1;

(8) FIG. 7 the movable guide element of FIG. 6 in a view pointing radially inward with respect to the firing channel axis;

(9) FIG. 8 a partially sectioned view of the movable guide element shown in FIG. 6;

(10) FIG. 9 the movable guide element of FIG. 6 in a view pointing radially outward with respect to the firing channel axis;

(11) FIG. 10 a further side view of the movable guide element shown in FIG. 6;

(12) FIG. 11 a kit according to the present invention for attachment to a nail setting device in a perspective view;

(13) FIG. 12 the kit of FIG. 11 in a further perspective view;

(14) FIG. 13 a perspective view of the nose of a nail setting device with a kit of FIG. 11;

(15) FIG. 14 another perspective view of the device nose shown in FIG. 13;

(16) FIG. 15 the device nose of the nail setting device of FIGS. 13 and 14 with a kit, but with a mounted stationary guide element in a perspective view;

(17) FIG. 16 another perspective view of the device nose shown in FIG. 15;

(18) FIG. 17 a perspective view of the stationary guide element of FIGS. 15 and 16; and

(19) FIG. 18 shows the stationary guide element from FIG. 17 in a further perspective view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

(20) FIGS. 1 and 2 show an arrangement according to the invention, which comprises a device nose 1 of a nail setting device for driving nails into workpieces to be joined.

(21) The device nose 1 of the nail setting device has a base body 2 in the form of a casting, which comprises a barrel 3 for guiding a nail to be driven into a workpiece and a firing pin, not shown, which drives the nail. The barrel 3 extends between a front free end 4, via which the nail emerges when driven into a workpiece, and a rear end of the base body 2 on the drive side. On the inside, the barrel 3 forms a firing channel 5 along a firing channel axis X. The barrel 3 also has an open front end section 6 in which it surrounds the firing channel 5 over only a partial circumferential section of about 180.

(22) In order to apply compressed air to the firing channel 5 for driving 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 for applying compressed air, which is not shown.

(23) The device nose 1 of the nail setting device also has a feeding device 8 for nails, which defines a feeding axis Y. The feeding axis Y forms an acute angle of about 75 with the firing channel axis X towards the rear. Along the feeding axis Y, nails of a nail strip oriented parallel to one another can be fed one after the other to the firing channel 5. Specifically, the feeding device 8 comprises a door 10 pivotably connected to the base body 2 via a hinge 9. In FIG. 2, the door 10 is shown in a closed state and securely closed by a locking element 11 engaging positively in a corresponding contour of the base body 2. If a nail strip is to be inserted into the feeding device 8, the locking element 11 is moved forward from the position shown in FIG. 2 against the restoring force of a tension spring 12, so that the door 10 can be opened and a nail strip can be inserted into the feeding device 8 before the door 10 is closed again.

(24) In a front end region of the base body 2, a guide rail 14 is provided on a forward-projecting protrusion 13, which extends parallel to the feeding axis Y and in front of it in order to support nails to be fed to the firing channel at their tip. Specifically, the guide rail 14 is formed integrally with the base body 2.

(25) FIGS. 3 to 5 show the guide rail 14 and the protrusion 13 of the base body 2 in detail. At its radially outer end region in relation to the firing channel axis X, the guide rail has a feeding slope 15 towards the top in order to move any nails that may have slipped in the nail strip back into their intended position. A longitudinal groove 16 is formed in the longitudinal direction of the guide rail 14 on its side facing rearwards towards the feeding axis Y. This groove has a rectangular cross-section, in order to support nails to be fed at their tip and to guide them along the feeding axis Y.

(26) Fastening means are provided on an end section of the guide rail 14 located radially inward with regard to the firing channel axis X in order to mount a movable guide element 17 so that it can pivot about a pivot axis Z relative to the base body. Specifically, the fastening means comprise a fastening bore formed in the guide rail 14. The movable guide element is pivotably mounted by means of a bolt 18, which passes through a bearing bore 19 and the fastening bore along the pivot axis Z and is secured against unintentional release by a locking ring 20.

(27) The guide element 17 can be pivoted between a radially inner guide position relative to the firing channel axis X, as shown in FIGS. 1 and 2, and a radially outer deflection 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 deflection position, radial deflection of a nail to be driven in is possible.

(28) FIGS. 6 to 10 show the movable guide element as a single component in detail. In its inner end face 21 facing the firing channel axis X, the movable guide element 17 has a linearly extending guide groove 22 for guiding a nail to be driven in and the firing pin. For this purpose, the guide groove 22 has a V-shaped cross-section with an opening angle of 90.

(29) On both sides of the guide groove 22viewed from the groove centera flat end face section 23 adjoins the guide groove 22 in each case, the two end face sections 23 lying in one plane. Further outwardly, at the transition to the side faces 24 bounding the guide element 17, chamfered slopes 25 follow, which are inclined at an angle of about 15 to the end surface sections 23.

(30) The rear end of the guide groove 22 opens into a central recess 26, which completely penetrates the guide element 17 radially to the firing channel axis X and separates two rearwardly projecting, mutually opposite webs 27, 28. The central recess 26 has a width of about 6.5 mm and is rounded at the transition to the webs 27, 28, as can be seen in particular in FIG. 7. The guide rail 14 engages flush in the central recess 26 so that there is no significant gap between the guide rail 14 and the webs 27, 28.

(31) The two webs 27, 28 project backwards differently from the central recess 26, with the web 27 arranged on the left in FIG. 9 projecting less backwards than the web 28 arranged on the right.

(32) In order to prevent blocking of a nail to be driven in, inlet contours are provided on both sides of the guide groove 22 in the transition to the webs 27, 28, which inlet contour are designed differently. In the transition to the web 27, the inlet contour is stepped and comprises a front inlet slope 29, which is inclined at an angle of 30 to the inner end face, and a rear inlet slope 30, which is inclined outwards relative to the latter and is inclined at an angle of 60 to the inner end face. A rounding 31 is formed between the front inlet slope 29 and the rear inlet slope 30, which rounding 31 has a radius of 4 mm. The front inlet slope 29, the rear inlet slope 30 and the rounding 31 arranged between them also form at least in part the transition from the guide groove 22 to the central recess 26.

(33) On the other side, the inlet contour at the transition to the web 28 is formed in a single step as an inlet chamfer 32 and is inclined at an angle of 15 to the inner end face. Adjacent to the inlet chamfer 32, the web 28 is rounded towards the rear and has the contour of a partial section of a circular arc.

(34) As can be seen in FIG. 1 and FIG. 2, stop means are provided to limit the movement of the guide element 17 in the direction of the guide position. Specifically, the stop means have a stop face 33 formed on the base body 2, which is located behind and radially outside of the pivot axis Z. The stop face 33 is located on the base body 2. A corresponding counter surface 34 of the guide element 17 rests against it.

(35) Furthermore, biasing means are provided to bias the guide element 17 in the direction of its guide position. The biasing means comprise a helical compression spring 35, which is supported between the protrusion 13 of the base body 2 and a section of the guide element 17 lying axially in front of the pivot axis Z. The biasing means are provided in the protrusion 13 of the base body 2 and in the guide element 17. To prevent the helical compression spring 35 from buckling, blind holes 36 are provided in the protrusion 13 of the base body 2 and in the guide element 17, in which blind holes 36 the helical compression spring 35 engages.

(36) FIGS. 11 and 12 show a kit 37 according to the present invention for attachment to a nail setting device 1; FIGS. 13 and 14 show a device nose 1 of a nail setting device having such a kit 37.

(37) The kit 37 makes it possible to retrofit an existing nail setting device with a guide rail 14 for guiding the nails to be fed and with a movable guide element 17 for guiding a nail to be driven and a firing pin.

(38) The kit 37 comprises a basic body 38, which is designed to be attached to the base body 2 of a device nose of the nail setting device. Attachment means are provided for this purpose, which in the present case comprise threaded holes 39 formed in the basic body 38 for screwing onto the base body 2 of a device nose 1 of a nail setting device. For positioning the basic body 38 relative to the base body 2 of a nail setting device 1, a contact surface 40 is formed on the basic body 38, which contact surface can be brought into contact with a corresponding mating edge 41 of the base body 2 of the device nose 1 of a nail setting device, as shown in FIGS. 13 and 14.

(39) A guide rail 14 is provided on the basic body 38 in the same way as on the protrusion 13 of the base body 2 of the device nose 1 of a nail setting device of FIGS. 1 to 10, in order to support the nails to be fed to the front. The guide rail 14 and the basic body 38 are formed in one piece.

(40) Also in the same manner, a guide element 17, as shown in FIGS. 6 to 10, is pivotably mounted on the guide rail 14 between a guide position and a deflection position so as to be suitable for partially closing the open front end portion 6 of the barrel 3 and allowing radial deflection of a nail to be driven in.

(41) Both in the device nose 1 of a nail setting device shown in FIGS. 1 and 2, in which the guide rail 14 is attached directly to the base body 2, and in the nail setting device 1 of FIGS. 13 and 14, which is provided with the kit 37 according to the invention, wooden nails are fed successively from a strip of nails to the barrel 3 by the feeding device 8.

(42) The guide rail 14 and the longitudinal groove 16 formed therein, as well as the feeding slope 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 feed of the nails towards the weft channel 5 is achieved.

(43) If a wooden nail inserted into the firing channel 5 is to be driven into a workpiece, the front free end 4 of the barrel 3 is first placed on the workpiece. Then, by manual operation or automated, the firing channel 5 is pressurized with air pressure so that the firing pin drives the wooden nail in the direction of the front free end 4 of the barrel tube 3 along the shot channel axis X. The nail is then driven into the workpiece. The nail leaves the barrel 3 at a speed of about 25 m/s and penetrates a workpiece. In the process, the nail is guided by the guide element 17 in the region of the open front end section 6 of the barrel 3.

(44) If the nail does not encounter a hard spot in the workpiece, it easily penetrates the workpiece completely without moving the guide element 17 out of the guide position and without the nail exerting radial forces on other components of the nail setting device, for example the firing pin or the guide element 17 or the barrel 3.

(45) If, on the other hand, the nail to be driven encounters a hard spot in the workpiece, it fibers out due to the lack of ductility and collapses. This causes the nail cross-section to widen in the rear end region of the nail, so that considerable radial forces occur. In this case, the guide element 17 moves radially outward with respect to the firing channel axis X against the biasing force of the helical compression spring 35, thus allowing the nail to expand radially. In addition, the central recess 26 of the guide element 17 causes wood fibers of the nail to emerge laterally from the firing channel 5. Furthermore, the defined deflection of the guide element 17, in particular due to its asymmetrical design, intercepts the nail and the firing pin driving it without causing high mechanical stresses that could damage components of the device nose 1 of a nail setting device.

(46) Even if a nail collapses by hitting 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 35, so that the next nail can be driven directly into the workpiece without the need for time-consuming interference suppression work. The fact that the guide rail 14 engages in the central recess 26 of the guide element 17 without any appreciable play also means that no wood fibers can get stuck and block the movement of the guide element 17 relative to the base body 2.

(47) In the case of certain nails, in particular those with a short length, it has proved advantageous not to provide an option for spreading. Accordingly, FIGS. 15 and 16 show a device nose 1 of a nail setting device with a basic body 38 according to the invention, whereby, however, no movable guide element 17, but a stationary guide element 42 is attached to the basic body 38. FIGS. 17 and 18 again show the stationary guide element 42 as a separate component in detail.

(48) The stationary guide element 42 has a linearly extending guide groove 44 with a semicircular cross-section in its inner end face 43 facing the firing channel axis X in the installed state. This serves to guide a nail to be driven in and the firing pin of the nail setting device 1. Flat end face sections 45 are arranged on both sides of the guide groove 44, the end face section 45 shown on the left in FIG. 18 opening at the top into a transitional slope 46. This slope 46 is inclined at an angle of about 30 to the flat end face section 45.

(49) As can be seen in particular in FIGS. 17 and 18, the guide groove 44 also extends over a rearwardly projecting guide groove protrusion 47 which is chamfered and rounded in its rear end region. Through this guide groove protrusion 47, the guide groove 44 extends substantially over the entire axial length of the open front end section 6 of the barrel 3.

(50) The stationary guide element 42 further includes fixing means for releasably attaching the guide element 42 to the basic body 38 of the kit 37. Specifically, the fixing means comprise a retaining bore 48 that extends completely through the stationary guide element 42. In FIGS. 15 and 16, it can be seen that the stationary guide element 42 is releasably secured to the basic body 38. In this case, the bolt 18 completely penetrates the retaining bore 48 of the stationary guide element 42 and the fastening bore of the basic body 38 and is secured against unintentional loosening by means of the locking ring 20.

(51) Furthermore, the stationary guide element 42 is provided with a central recess 49 which is open towards the rear and radially outwards and in which the guide rail 14 of the basic body 38 engages, so that a space-saving attachment of the stationary guide element 42 can be realized.

(52) At its radially outer end, the stationary guide element 42 has a contact face 50 which can be brought into abutment with a corresponding second stop face 51 of the basic body 38 in order to firmly position the stationary guide element 42 on the basic body 38. In conjunction with the attachment via the retaining bore 48, the stationary guide element 42 is thus firmly positioned on the basic body 38 and thus relative to the base body 2 of the nail setting device, as can be seen in FIG. 15.

(53) A user can thus optionally, i.e. depending on the type of nails to be driven in and depending on further general conditions, either attach a stationary guide element 42 or a movable guide element 17 to the nail setting device. To do this, he simply has to remove the locking ring 20 from the bolt 18 and pull the bolt 18 out of the corresponding holes. Replacement of the guide element 17, 41 is then possible without any problems. In this way, the nail setting device shown can be used universally and is suitable for various nails to be driven in, in particular those made of lignocellulosic material.