JP4957372B2 - Power driven nailer - Google Patents

Description

  The present invention can apply a shock to a nail head of a nail by using a driver that is driven to impact by using compressed air or the like and can drive a nail into a material to be driven such as wood or concrete. The present invention relates to a power driven nailer.

  As a power-driven nailer, by introducing compressed air into the cylinder, the piston housed in the cylinder and the driver coupled to the piston are driven to project impactfully, and the nail is placed on the material to be driven such as wood. Compressed air driven nailers are known. In addition, a high-pressure combustion gas is generated by burning a combustible gas in a combustion chamber formed in the housing, and the piston and the driver are driven to project impactfully by this combustion gas, and a nail is driven into the driven material. Combustion gas driven nailers are known.

  Such a power-driven nailing machine includes an impact mechanism that is roughly constituted by a cylinder provided in a housing, a piston slidably accommodated in the cylinder, a driver connected to the piston, and the like. A housing main body is provided. In addition, a nose portion having an injection space for guiding a nail to be driven out toward the material to be driven is provided at the tip of the housing main body. When the piston is slid in the cylinder and the driver is driven to protrude, the driver is guided into the injection space and hits the nail set in the injection space, and the nail is driven out from the tip of the nose part It has become.

  A magazine for continuously supplying nails to the injection space is connected to the nose portion of the power driven nailer. The magazine can be filled with connecting nails in which a plurality of nails are connected by aligning the shaft portions of adjacent nails in parallel. The magazine has a magazine main body that has a rectangular cylindrical shape. The front end of the magazine is connected to the nose to form a communication space that communicates from the inside of the cylinder to the injection space. An introduction opening for introducing the connecting nail into the space is formed.

  Further, the magazine is provided with a pusher device for pushing the introduced connecting nail into the injection space of the nose portion. The pusher device can be slid in a state where the upper surface is exposed from an opening formed on one side surface of the magazine main body (this surface is the upper surface). As described above, a power-driven nailing machine in which an introduction opening is formed at the rear end of the magazine main body is generally referred to as a rear-loading type (rear insertion type) power-driven nailing machine (for example, Patent Document 1). And Non-Patent Document 1).

  As shown in FIGS. 2 (a), 6 (a) and 6 (b), a pusher guide groove 17 that allows the pusher device 13a to slide and a movement of the connecting nail 20 are formed on the inner side of the magazine body 12. The nail guide groove 19 is formed on the lower surface side of the pusher guide groove 17 so as to be parallel to the pusher guide groove 17.

  The pusher device 13a includes a pusher holder 18c that slides along the pusher guide groove 17, and a swinging pusher 21b that is swingably supported by the pusher holder 18c. The swinging pusher 21 b is biased by a biasing member such as a coil spring 22, and normally the tip end (the end portion on the nose portion 8 a side, the contact end portion) 26 c is lowered to the lower surface 31 side of the magazine main body portion 12. The state that was made to remain is maintained. In a state where the swinging pusher 21b is swung and the tip end portion 26c is lifted upward, the bottom end of the swinging pusher 21b is located above the groove forming position of the nail guide groove 19, so that the swinging pusher 21b is swung. The pusher 21b and the connecting nail 20 are not engaged. However, in the state where the tip end portion 26c is lowered to the lower surface 31 side without swinging the swinging pusher 21b, the lower end portion of the swinging pusher 21b is the nail guide groove 19 as shown in FIG. The swinging pusher 21 b is engaged with the connecting nail 20.

  For this reason, in the rear-loading type power-driven nail driver, the connecting nail 20 introduced from the introduction opening 14 is caused to swing the leading end portion 26c of the swinging pusher 21b upward so that the introduction opening of the pusher device 13a. It can be moved from the side to the nose portion 8a side. Thereafter, by lowering the distal end portion 26c of the swinging pusher 21b, the pusher device 13a can be slid while the coupling nail 20 is engaged with the distal end portion 26c, so that the coupling nail 20 is ejected from the nose portion 8a. It becomes possible to supply to Sa.

  As shown in FIGS. 6A and 6B, the injection space Sa of the nose portion 8a is configured by a cylindrical body (cylindrical member) 9a having a substantially C-shaped cross section, and the nose portion 8a and the magazine main body portion. By connecting the front end portions of 12, the open portion 11 a having a C-shaped cross section communicates with the inside of the magazine main body portion 12. The connecting nail 20 conveyed to the injection space Sa by the pusher device 13a has a structure in which the pusher device 13a pushes the nail into the injection space Sa one by one, and is the last to come into contact with the distal end portion 26c of the swinging pusher 21b. When the nail is guided to the injection space Sa, the distal end portion 26c of the swinging pusher 21b is structured to enter the opening portion 11a of the injection space Sa. As described above, the tip 26c of the swinging pusher 21b enters the opening 11a of the injection space Sa, so that the last nail can be reliably guided to the injection space Sa, and the guided nail It is possible to prevent the nail that has been driven out from being buckled or the nail head from being turned up because it is installed in the injection space Sa in an inclined state due to the presence of the opening portion 11a.

  Here, in a state where the pusher device 13a moves to the nose portion 8a side and the distal end portion 26c of the swinging pusher 21b enters the opening portion 11a of the injection space Sa, the connecting nail 20 slid and moved from the introduction opening side is A case where the swinging pusher 21b comes into contact with the side surface of the introduction opening side will be described. Normally, the bottom surface 21c of the swinging pusher 21b is configured by a gently curved surface that is inclined toward the tip end portion 26c so that the connecting nail 20 smoothly contacts the bottom surface 21c when the tip end portion 26c is raised. Yes. For this reason, when the connecting nail 20 comes into contact with the side surface of the swinging pusher 21b on the introduction opening side in a state in which the distal end portion 26c of the swinging pusher 21b enters the opening 11a of the injection space Sa, the swinging pusher 21b In some cases, the nail enters a portion where the distance between the bottom surface 21c and the nail guide groove 19 is narrow, and the pusher device 13a is difficult to slide. In such a case, if the pusher device 13a is forcibly moved, the nail is further caught between the tips of the gaps, and there is a problem that the pusher device 13a may not be moved at all.

  Therefore, above the opening 11a of the nose 8a, as shown in FIGS. 2 (a), 6 (a) and 6 (b), the tip 26c of the swinging pusher 21b is formed in the opening 11a of the injection space Sa. A swinging movement space 40 is formed so that the tip end portion 26c of the swinging pusher 21b can be raised in the inserted state. When the connecting nail 20 enters between the bottom surface 21c of the swinging pusher 21b and the guide groove 19 for the nail, the tip 26c is guided to the swinging movement space 40 by swinging the swinging pusher 21b. Therefore, the connecting nail 20 that has entered between the bottom surface 21c of the swinging pusher 21b and the nail guide groove 19 can be released. For this reason, the pusher device 13a can be easily moved to the introduction opening side of the connecting nail 20 by sliding the pusher device 13a in this state.

In order to prevent the nail supplied to the injection space Sa from being filled in a tilted state, it is desirable that the above-described swing movement space 40 is as small as possible. Therefore, as shown in FIG. 5A, the general swinging pusher 21b has a shape in which the tip end portion 26c is cracked into two, and the swinging movement space 40 is also shown in FIG. As shown in FIG. 3, the tip end 26c of the rocking pusher 21b that is cracked is formed so as to correspond to the shape. Thus, since the swing movement space 40 is formed corresponding to the tip end portion 26c of the swing pusher 21b, the open area of the injection space Sa formed by the opening portion 11a and the swing movement space 40 is reduced. When the nail is supplied to the injection space Sa, it is possible to reduce the filling of the nail into the injection space while being inclined obliquely, and to reduce the occurrence of buckling of the nail that is launched. It is possible.
Japanese Examined Patent Publication No. 7-32988 Max Co., Ltd. Normal pressure nailer KN-510A / KB50T0 Refer to page 12-14 of the instruction manual

  As described above, the rocking movement space is formed without making the tip of the rocking pusher tip-shaped by minimizing the rocking movement space by making the tip part of the rocking pusher to be cracked. The percentage of nails in which buckling occurs can be reduced as compared with a power-driven nailer. However, in a power-driven nailer equipped with a rocking pusher with a tip cracked, the nail cannot be reliably guided in the middle portion where the tip is cracked. There was a problem that the rate at which the nail buckled was higher than when a pusher was used.

  On the other hand, when the tip portion is not tapered, it is necessary to secure a large oscillating movement space, which increases the area of the open portion of the open portion of the nose portion, resulting in the nail being seated. There was a problem that the rate of bending increased.

  Further, when the tip end portion is not formed into a tip shape and the swing movement space is not formed, as described above, the introduction opening of the swing pusher is in a state where the tip end portion of the swing pusher enters the open portion of the injection space. When the nail comes into contact with the side, there is a problem that it becomes difficult to slide the pusher device.

  The present invention has been made in view of the above problems, and is a case where a nail abuts on the introduction opening side of the swinging pusher in a state where the tip of the swinging pusher enters the open part of the injection space. However, it is an object of the present invention to provide a power driven nail driver that can smoothly slide the pusher device and that can effectively reduce the occurrence of buckling of the hammered nail. .

  In order to solve the above-described problems, a power-driven nailer according to the present invention has a cylindrical member that forms a driving track of a driver that is driven to project in an impact, and the driving track is formed on a side wall of the cylindrical member. A nail having a nose portion on which an opening for guiding a nail is formed and a guide portion for a nail that allows sliding movement of the nail, and introduced from an introduction opening formed at one end, A magazine main body portion that is guided along the nail guide portion to the other end portion that is connected to the nose portion and communicates with the open portion, and a magazine main body portion that corresponds to the nail guide portion. A pusher holder that can slide along the formed pusher guide portion, and a contact end that is swingably supported by the pusher holder and abuts against the nail from the introduction opening side A swinging pusher having a portion The abutting end portion of the swinging pusher is formed by a single plate that can enter the opening portion, and the nail guide portion is slid to a position near the swinging base axis of the swinging pusher. A nail support portion that comes into contact with the nail from the nose portion side is provided.

  Here, the nail is not limited to a single nail, but includes, for example, a connecting nail in which a plurality of nails are connected in parallel with each other by a connecting member formed of a resin material or the like. It also includes a bundle of nails.

  In the power driven nail driver according to the present invention, a nail support portion that comes into contact with the nail introduced from the introduction opening from the nose portion side is provided in the vicinity of the rocking base axis of the rocking pusher. It is possible to prevent the nail from entering a portion between the bottom surface of the swinging pusher and the nail guide portion where the interval becomes narrow like a wedge. For this reason, even when the contact end portion of the swinging pusher enters the open portion of the nose portion, the pusher device can be easily slid.

  In particular, since the nail support portion is provided in the vicinity of the swing base axis of the swing pusher, the swing pusher is easily driven to swing even if a force toward the nose portion is applied to the nail support portion. Never happen. For this reason, even if the pusher device is slid in a state where the nail support portion is engaged with the nail, the swinging pusher does not easily swing during the sliding movement, and the pusher device slides. The nail can be slid to the introduction opening side.

  Further, since the pusher device can be slid without oscillating the oscillating pusher, it is not necessary to form an oscillating movement space above the opening of the nose part. For this reason, it is possible to suppress the opening portion of the injection space from being expanded due to the formation of the swing movement space, and when the nail is supplied to the injection space, the nail is filled in the injection space in an oblique state. It is possible to reduce the occurrence of buckling and the like of the nail to be driven out.

  Furthermore, it is not necessary to form a swinging injection space, and it is not necessary to form the contact end of the swinging pusher in a cracked shape, so the contact end is formed by a single plate that can enter the open part. By doing so, the nail supplied to the drive track is positioned in the injection track by the wall surface and the contact end of the cylindrical member. For this reason, it is possible to prevent the nail set on the ejection track from being inclined, and it is possible to prevent the nail that is ejected by driving the driver from buckling or the like. .

  In particular, the contact end portion is formed by a single plate that can enter the opening portion, so that it is possible to effectively close the opening portion with the contact end portion that has entered the opening portion. It is possible to effectively suppress the occurrence of inclination and the like.

  Further, even when the nail to be supplied is a connecting nail, the nail adjacent to the nail set on the driving locus is arranged so as to block the open portion, so that the nail is buckled in the same manner. Can be prevented.

  Moreover, the contact surface with the said nail in the said nail support part of the said power drive nailing machine may be comprised by the inclined surface which inclines toward the said introduction opening side from the said nose part side.

  Thus, when the contact surface of the nail support portion with the nail is constituted by an inclined surface inclined from the nose portion side toward the introduction opening side, a pressing force is applied in the nose portion direction with respect to the inclined surface. By adding, it becomes easy to swing the contact end portion of the swinging pusher. Therefore, when the pusher member with the nail engaged with the nail support is slid and the nail stopper provided on the rear-loading type power-driven nailer is restricted, the nail is restricted by this restriction. A pressing force is applied to the inclined surface of the support portion to swing the swinging pusher, and the pusher device can be moved to the introduction opening side of the nail.

  In the power-driven nail driver according to the present invention, a nail support portion that comes into contact with the nail introduced from the introduction opening from the nose portion side is provided in the vicinity of the rocking base shaft of the rocking pusher. Even when the nail is in contact with the introduction opening side of the swinging pusher with the tip of the swinging pusher in the open part, the nail support part is located between the bottom surface of the swinging pusher and the bottom surface of the body part. It is possible to prevent the pusher device from entering, and to ensure smooth sliding movement of the pusher device.

  In addition, the presence of the nail support portion can prevent the nail from entering between the bottom surface of the swinging pusher and the nail guide portion, so that the contact end of the swinging pusher is moved upward. Therefore, it is not necessary to form an oscillating movement space. For this reason, the tip of the swinging pusher can be formed into a single plate shape without making the tip cracked, so that the nail supplied to the injection track is brought into contact with the inner wall of the cylindrical member and the single plate shape. Positioning can be performed by the end portion, and occurrence of buckling of a nail hit by a driver can be effectively reduced.

  Hereinafter, a power-driven nailer according to the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol shall be attached | subjected about the component same as the conventional power drive nailer demonstrated in [background art].

  FIG. 1 is a side view showing a nailer as a power-driven nailer according to an embodiment.

  The nailer 1 is roughly configured by a housing body 2 and a magazine 3. The housing main body 2 includes a housing 4 that houses an impact mechanism (not shown) inside, and a grip 5 for the operator to grip the nailer 1 is formed below the housing 4. Has been.

  An air plug 6 for sucking compressed air used for driving the impact mechanism is provided at the lower end of the grip 5. By connecting an air hose of an air compressor (not shown) to the air plug 6, it becomes possible to secure a power source of the impact mechanism unit with compressed air.

  The housing body 2 is provided with a trigger 7 that can be operated while holding the grip 5. When the operator performs a nail driving operation, it is necessary to operate (pull) the trigger 7 in addition to the ON operation of the contact arm 10 described below.

  A nose portion 8 to which the magazine 3 is connected is formed at the front portion of the housing body portion 2, and the tip of the nose portion 8 is placed at the tip of the nose portion 8 as a target for driving a nail (a material to be driven). A contact arm 10 is formed which is turned on by being pressed onto the contact arm 10. When the operator performs the nail driving operation, the trigger 7 is pulled while the contact arm 10 is turned on by pressing the tip of the nose portion 8 to the nail driving position in the driven material. It is possible to perform driving operations. In this manner, the nail is ejected only when both the ON operation of the contact arm 10 and the trigger 7 operation are realized, thereby preventing an unintended (unintentional) nail ejection.

  As shown in FIG. 3, the nose portion 8 includes a cylindrical body (cylindrical member) 9 having a substantially C-shaped cross section. The inner space of the nose portion 8 formed by the cylindrical body 9 has a role as an injection space (driving track) S in which a projecting drive of a driver (not shown) described below is performed. Can load nails one by one. In addition, a contact end portion 26 of a swing arm 21 described later can be made to enter the opening portion 11 of the cylindrical body 9 having a substantially C-shape. The opening portion 11 having a substantially C-shaped cross section is blocked, and the filling position of the filled nail is prevented from being displaced.

  In the nailer 1 shown in the present embodiment, as shown in FIG. 2B, the swing movement space 40 provided in the conventional nailer (see FIG. 2A) is not provided. For this reason, it can suppress that the big open part 11a is formed in the cylinder 9a by formation of the rocking | swiveling movement space 40 like the nailer in which the rocking | swiveling movement space 40 was formed, The nail to be filled can be sufficiently guided by the inner wall of the cylindrical body 9. Thus, since the nail filled in the injection space S can be sufficiently guided, it is possible to reduce the rate at which the nail driven out from the tip of the nose portion 8 causes buckling or the like.

  A cylinder (not shown) is provided inside the housing body 2, and the compressed air is filled into the cylinder by simultaneous operation (injection operation) of the ON operation of the contact arm 10 and the operation of the trigger 7. Thus, the piston suddenly moves in the direction of the nose portion 8. A rod-shaped driver is connected to the center of the nose portion 8 of the piston, and the driver projects and moves in an impact manner into the injection space S formed in the nose portion 8 in accordance with the movement of the piston. ing. For this reason, it is possible to supply the nail onto the driving track of the driver that drives to project by loading the nail into the injection space S of the nose portion 8, and by hitting the nail head of the nail with the tip of the driver, It is possible to drive from the tip of the nose portion 8 toward the workpiece.

  As shown in FIG. 1, the magazine 3 is roughly constituted by a magazine body 12 and a pusher device 13. The magazine body 12 has a rectangular cylindrical shape, and an introduction opening 14 for introducing a nail into the magazine body 12 is formed at one end thereof. Further, the other end of the magazine main body 12 is connected to the nose portion 8 so that a space communicating from the inside of the magazine main body 12 to the injection space S through the opening 11 having a C-shaped cross section is secured. ing. The nail introduced from the introduction opening 14 is guided to the injection space S through this communicating space.

  An opening 16 extending in the extending direction of the magazine 3 is formed on one side surface of the magazine main body 12 (this surface is the upper surface), as shown in FIGS. Further, as shown in FIGS. 2B and 3, a pusher guide groove 17 extending in the longitudinal direction of the magazine body 12 is formed on the inner surface of the magazine body 12. ing. The pusher device 13 can slide the magazine 3 along the pusher guide groove 17, and the operator can move the pusher device 13 by grasping the pusher holder 18 exposed from the opening 16. It is possible to perform operations. The pusher guide groove 17 is provided with an urging mechanism that slides the pusher device 13 in the direction of the nose 8 by a spring member (not shown).

  Further, a nail guide groove (nail guide portion) 19 for guiding the nail to the injection space is formed on the inner side surface of the magazine main body portion 12. The nail guide groove 19 is provided on the inner surface closer to the lower surface 31 than the pusher guide groove 17 so as to be parallel to the pusher guide groove 17. Therefore, the nail guided by the nail guide groove 19 is configured to slide and move to the nose portion 8 side so as to pass under the pusher device 13. As the nail stored in the magazine main body 12, a connecting nail 20 (see FIG. 3) in which a plurality of nails are connected in parallel to each other by a connecting member formed of a resin material or the like is used.

  As shown in FIGS. 4A to 4C, the pusher device 13 includes a pusher holder 18 that slides along the pusher guide groove 17, and a swinging pusher 21 that is swingably provided on the pusher holder 18. And have.

  The pusher holder 18 is roughly configured by a pusher main body portion 18 a on which the swinging pusher 21 is installed and a slide leg portion 18 b that engages with the pusher guide groove 17. The slide leg portion 18 b is configured by the pusher guide groove 17. The pusher device 13 can be slid in the extending direction of the pusher guide groove 17. The pusher body 18a is configured such that the upper part is exposed from the opening 16 in a state where the pusher holder 18 is engaged with the pusher guide groove 17, and the operator holds the pusher holder 18 by grasping the exposed portion. It is possible to perform the slide movement.

  The pusher body portion 18a is formed with a swing shaft portion 23 for holding the swing pusher 21 so as to be swingable. The swing shaft portion 23 is provided in the pusher main body portion 18 a so as to be perpendicular to the extending direction of the slide leg portion 18 b of the pusher holder 18. Thus, by providing the swing shaft portion 23 perpendicular to the extending direction of the slide leg portion 18b, the swing shaft portion 23 can be provided perpendicular to the slide movement direction of the pusher device 13, and therefore the swing pusher. 21 can be swung in the sliding direction of the pusher device 13. The pusher main body 18 a is formed with a guide hole 24 for guiding the end of the swinging pusher 21 on the introduction opening 14 side to the upper surface side of the pusher holder 18.

  The swinging pusher 21 includes a contact end portion (tip portion) 26 that constitutes an end portion on the nose portion 8 side, a pressing end portion 27 that constitutes an end portion on the introduction opening 14 side, and a swinging shaft portion 23 of the pusher holder 18. And a support portion 28 that is supported by rocking motion.

  As shown in FIG. 4A, the abutting end portion 26 of the swinging pusher 21 has a single end (single plate) having a width R slightly narrower than the end portion width of the pusher holder 18. The end portion is formed with an upstanding surface 26a for ensuring contact with the connecting nail 20. When the connecting nail 20 is positioned on the nose portion 8 side with respect to the pusher device 13, the standing surface 26 a comes into contact with the connecting nail 20 and uses the biasing force of the biasing mechanism provided in the pusher guide groove 17. The connecting nail 20 is slid to the nose portion 8 side.

  The swinging pusher 21 is configured to maintain substantially the same width R from the contact end portion 26 to the support portion 28, but the width becomes narrower from the support portion 28 toward the press-down end portion 27. 27, the dimension width is defined so as to have a dimension corresponding to the hole width of the guide hole 24 of the pusher holder 18. For this reason, in the swinging pusher 21, the pressing end 27 can be exposed to the upper surface side of the pusher holder 18 through the guide hole 24. In this state, the swinging shaft portion 23 is supported by the support portion 28. By allowing the pusher holder 18 to oscillate, the oscillating pusher 21 can be oscillated and supported. In this way, by swinging the swing pusher 21 using the swing shaft portion 23 as the swing base shaft, the contact end portion 26 is moved up and down from the groove forming position of the nail guide groove 19 to the upper side of the groove forming position. It is possible to make it.

  As shown in FIG. 4B, the pusher holder 18 that swings and supports the swing pusher 21 is provided with a coil spring 22 that urges the pressing end 27 upward. By urging the end portion 27 upward, the contact end portion 26 is maintained in a state of being lowered to the groove forming position of the nail guide groove 19. Since the pressing end 27 is exposed on the upper surface of the pusher holder 18, when the operator presses the pressing end 27 in the direction of the pusher holder 18 (downward), as shown in FIG. It is possible to raise the contact end portion 26 by swinging the swing pusher 21.

  Further, the bottom surface 21 a near the abutting end portion 26 of the swing pusher 21 is formed by a gently curved surface, as shown in FIGS. 4B and 4C, and slightly with respect to the swing shaft portion 23. On the bottom surface 21a near the nose portion 8 side, a nail support portion 25 having a bottom surface (inclined surface) 25a that is gently inclined so as to draw a curve from the nose portion 8 side to the introduction opening 14 side is formed. . As shown in FIG. 4B, the angle A1 of the bottom surface 25a of the nail support portion 25 is maintained at an angle of about 45 degrees from the extending direction of the nail guide groove 19 when the contact end portion 26 is lowered. The angle A1 is wider than the angle A2 of the bottom surface 21a of the abutting end portion 26. Since the angle A1 of the bottom surface 25a of the nail support portion 25 is defined to be about 45 degrees, when the nail at the end portion on the nose portion 8 side of the connecting nail 20 contacts the bottom surface 25a of the nail support portion 25, On the other hand, it abuts from a direction of 45 degrees diagonally upward.

  The above-mentioned standing surface 26a is provided on the contact end portion 26 so that the contact end portion 26 can be engaged with the connecting nail 20 from the side when the contact end portion 26 is lowered to the groove forming position of the nail guide groove 19. When the connecting nail 20 is positioned on the nose portion 8 side with respect to the pusher device 13, the rising surface 26 a abuts on the connecting nail 20 and is provided in the pusher guide groove 17. The connecting nail 20 is slid to the nose portion 8 side using the urging force.

  The connecting nail 20 introduced from the introduction opening 14 along the nail guide groove 19 is prevented from returning to the introduction opening 14 in the vicinity of the introduction opening 14 on the lower surface 31 of the magazine body 12. A nail stopper (return preventing means) 30 (see FIGS. 3B and 3C) is provided.

  The nail stopper 30 is constituted by a metal piece (elastic metal piece, elastic piece member) having elasticity. When the connecting nail 20 is introduced from the introduction opening 14, the nail stopper 30 is connected by bending the body portion 30a. The nail 20 can be guided to the nose portion 8 side. On the other hand, when the pusher device 13 is slid to the introduction opening 14 side in a state where the nail is in contact with the nail support portion 25 described above, as shown in FIG. 30b contacts the introduction opening 14 side end part of a connection nail, and the sliding movement of the connection nail 20 is restrict | limited. In such a state where the connecting nail 20 is limited, the pusher device 13 is further slid to apply a pressing force that exceeds the urging force of the coil spring 22 to the nail support portion 25. FIG. As shown, the swinging pusher 21 that abuts the connecting nail 20 raises the abutting end portion 26 according to the curve (inclination) in the bottom surface 25a of the nail support portion 25. For this reason, the pusher device 13 can be slid to the introduction opening 14 side of the connecting nail 20 through the upper side of the connecting nail 20, and the connecting nail is brought into contact with the lowered contact end portion 26 of the swinging pusher 21. 20 can be engaged.

  Next, the operation of the pusher device 13 configured as described above will be described.

  As described above, the pusher device 13 moved to the introduction opening 14 side of the connecting nail 20 using the nail stopper 30 is moved by the urging force of the urging mechanism provided in the pusher guide groove 17. It is moved to the end of the nose portion 8 side. When the pusher device 13 is moved to the nose portion 8 side, the connecting nail 20 that abuts against the abutting end portion 26 is also moved along with the pusher device 13, and as shown in FIG. The connecting nails 20 are sequentially supplied to the eight injection spaces S. The nail supplied to the injection space S is hit with a nail head by a driver in accordance with an injection operation by the trigger 7 and the contact arm 10 and is driven into a material to be driven.

  3A is a cross-sectional view showing the vicinity of the nose portion 8 of the nailer 1 according to the present embodiment, and FIG. 6A is a cross-sectional view showing the vicinity of the nose portion of the conventional nailer. FIGS. 3A and 6A show a state in which the last one of the connecting nails 20 is supplied to the injection spaces S and Sa by the pusher devices 13 and 13a. The pusher devices 13 and 13a The contact end portions 26 of the swinging pushers 21 and 21b are inserted into the open portions 11 and 11a of the cylindrical bodies 9 and 9a forming the nose portions 8 and 8a.

  As shown in FIG. 6A, the nose portion 8a of the conventional nailer is provided with a swing movement space 40 that allows the tip portion 26c of the swing pusher 21b that has entered the opening portion 11a to move upward. However, as shown in FIG. 3A, the swing movement space 40 is not provided in the nose portion 8 of the nailer 1 according to the present embodiment.

  In this state, when the connecting nail 20 is introduced into the magazine main body 12 from the introduction opening 14 side and is slid to the nose portion 8 side, as shown in FIGS. The connecting nail 20 may be in contact with the introduction opening 14 side of the moving pushers 21 and 21b. In this case, in the conventional nailer, as shown in FIG. 6A, since the inclination angle A2 of the bottom surface 21c of the swinging pusher 21b with respect to the guide groove 19 for nails is an acute angle, the leading nail of the connecting nail 20 is nail. In some cases, the pusher device 13a cannot be slid and moved between the guide groove 19 and the bottom surface 21c of the swinging pusher 21b.

  On the other hand, in the nailer 1 according to the present embodiment, the nail support portion 25 is formed on the bottom surface 21a of the swinging pusher 21, and the bottom surface 25a of the nail support portion 25 and the nail are formed as shown in FIG. Since the angle A1 formed by the guide groove 19 is a gentler angle than the inclination angle A2 of the bottom surface 21a of the swinging pusher 21, the connecting nail 20 is connected to the bottom surface of the nail guide groove 19 and the swinging pusher 21. The structure is difficult to enter between 21a.

  When the pusher device 13 is slid to the introduction opening 14 side with the connecting nail 20 in contact, the connecting nail 20 is also moved to the introduction opening 14 side in a state where the connecting nail 20 is in contact with the nail support portion 25. The slide will be moved. For this reason, the pusher device 13 can be moved to the introduction opening 14 side without providing the swing movement space 40 above the open portion 11a of the cylindrical body 9a as in the conventional nailer. Since it is not necessary to provide the swing movement space 40 in this way, the nail supplied to the injection space S is a swing pusher that closes the inner wall and the opening 11 by the inner wall of the cylindrical body 9 and the adjacent nail. 21 and the abutting end portion 26 are surely guided and aligned straight. For this reason, a driver can be made to collide reliably with respect to the nail head of a nail, and it becomes possible to reduce effectively the buckling of the nail | punch | punched out.

  FIG. 5A shows a horizontal section in the vicinity of the nose portion 8a in the conventional nailer, and FIG. 5B shows a horizontal section in the vicinity of the nose portion 8 in the nailer 1 according to the present invention. In the nailer 1 according to the present embodiment, since the swing movement space 40 is not formed in the nose portion 8 as described above, it is not necessary to form the contact end portion 26 of the swing pusher 21 in the shape of a tip. . For this reason, the abutting end portion 26 of the swinging pusher 21 can be constituted by a single tooth (single plate), so that the nail supplied to the injection space S can be used as a standing surface 26a of the abutting end portion 26. As a whole, the guide can be guided and the injection space S can be loaded straight into the injection space S.

  Further, in the conventional nailer, in order to swing the swinging pusher 21b in the opening part 11a of the nose part 8a, the installation angle of the swinging shaft part 23a formed in the pusher holder 18c is set to the cylindrical body 9a in the nose part 8a. It was necessary to make it parallel to the central axis. However, in the nailer 1 according to the present embodiment, it is not necessary to swing the swinging pusher 21 in the opening part 11 of the nose part 8, so that the installation angle of the swinging shaft part 23 formed in the pusher main body part 18a is eliminated. Is no longer required to be parallel to the central axis of the cylindrical body 9 in the nose portion 8, and can be installed perpendicular to the pusher guide groove 17. For this reason, the swinging pusher 21 can be swung in the sliding direction of the pusher device 13, and the sliding range of the pusher device 13 can be expanded to the position near the nose portion 8 as much as possible. 20 can be transported and supplied reliably.

  When the connecting nail 20 comes into contact with the nail support portion 25 of the swinging pusher 21, the operator holds the pusher holder 18 and slides the pusher device 13 toward the introduction opening 14, whereby FIG. As shown, the connecting nail 20 can be moved to the nail stopper 30. When the pusher device 13 is further slid in a state where the connecting nail 20 is engaged with the nail stopper 30, a pressing force is applied to the bottom surface 21a of the swinging pusher 21 via the nail support portion 25 as shown in FIG. Will be added. In this case, the nail support portion 25 is configured such that the bottom surface 25a is curved, and further, with respect to the extending direction of the nail guide groove 19 in a state where the contact end portion 26 of the swinging pusher 21 is lowered. Since the angle is defined as 45 degrees, the pressing force from the connecting nail 20 applied to the nail support portion 25 acts in a direction to move the contact end portion 26 of the swinging pusher 21 upward, The contact end portion 26 of the swinging pusher 21 is raised.

  Thus, when the abutting end portion 26 of the swinging pusher 21 is moved to the upper side of the connecting nail 20, the engagement between the swinging pusher 21 and the nail at the end of the connecting nail 20 on the nose portion 8 side is released. Is done. Therefore, the pusher device 13 can slide along the pusher guide groove 17 toward the introduction opening 14 of the connection nail 20 in a state where the slide movement of the connection nail 20 is restricted by the nail stopper 30. In the pusher device 13 slid to the introduction opening 14 side of the connecting nail 20, the contact end portion 26 of the swinging pusher 21 is lowered by the urging force of the coil spring 22 and engages with the introduction opening 14 side of the connecting nail 20. Accordingly, the connecting nail 20 can be slid to the nose portion 8 side and supplied to the injection space S by the urging force of the urging mechanism provided in the pusher guide groove 17.

  As described above, in the nailer 1 according to the present embodiment, since the nail support portion 25 is formed on the bottom surface 21 a of the swinging pusher 21, the connecting nail 20 is connected to the nail guide groove 19 and the swinging pusher 21. It is possible to prevent entering a wedge-shaped gap between the bottom surface 21a. For this reason, unlike the conventional nailer, it is not necessary to move the contact end of the swinging pusher upward, and the connection nail 20 is moved to the side of the introduction opening 14 with the connection nail 20 being contacted by the nail support portion 25. Can be moved to the slide.

  Further, unlike the conventional nailer, it is not necessary to move the abutting end of the swinging pusher upward, and it is not necessary to provide the swinging movement space 40. Therefore, the nail supplied to the injection space S is the cylinder 9 The inner wall and the abutting end portion 26 of the swinging pusher 21 that enters the opening portion 11 are surely guided and aligned straight. For this reason, a driver can be made to collide reliably with respect to a nail head, and it becomes possible to reduce effectively the buckling of the nail | punch struck out.

  Further, as described above, since it is not necessary to provide the swing movement space 40 in the nose portion 8, it is not necessary to form the contact end portion 26 of the swing pusher 21 in a cracked shape, and the contact of the swing pusher 21. The end portion 26 can be constituted by a single tooth (single plate). For this reason, the nail supplied to the injection space S can be guided by the whole standing surface 26a of the contact end portion 26, and the nail can be loaded straight into the injection space S.

  The power driving nailer according to the present invention has been described in detail with reference to the drawings. However, the power driving nailer according to the present invention is not limited to the above-described embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention.

  For example, in the above-described embodiment, the case where compressed air is used as a drive source as an impact mechanism unit for driving the driver to protrude is described as an example. However, the drive source of the impact mechanism unit does not necessarily use compressed air. For example, the driving source may be ensured by burning combustible gas in the combustion chamber, or the impact mechanism unit may be driven using electricity.

It is an appearance side view showing a nailer according to an embodiment. (A) is the expansion perspective view which showed the nose part vicinity in the conventional nailer, (b) is the expansion perspective view which showed the nose part vicinity in the nailer shown in embodiment. (A) is the expanded sectional view which showed the nose part vicinity of the nailer which concerns on embodiment, (b) and (c) are the expanded sectional views which show the structure of the introduction opening vicinity in a magazine main-body part. (A) is the top view which showed the pusher apparatus which concerns on embodiment, (b) And (c) is sectional drawing which showed the pusher apparatus. (A) is the expanded horizontal sectional view which showed the nose part vicinity in the conventional nailer, (b) is the expanded horizontal sectional view which showed the nose part vicinity in the nailer shown in embodiment. It is the expanded sectional view which showed the nose part vicinity in the conventional nailer.

Explanation of symbols

1 ... Naira (power-driven nailer)
2 ... Case body 3 ... Magazine 4 ... Housing 40 ... Oscillating movement space 5 ... Holding part 6 ... Air plug 7 ... Trigger 8, 8a ... Nose part 9, 9a ... Cylinder (tubular member)
DESCRIPTION OF SYMBOLS 10 ... Contact arm 11, 11a ... Opening part 12 ... Magazine main-body part 13, 13a ... Pusher apparatus 14 ... Opening opening 16 ... Opening part 17 ... Pusher guide groove 18, 18c ... Pusher holder 18a ... Pusher main-body part 18b ... Slide leg Part 19 ... Guide groove for nail (guide part for nail)
20 ... connecting nails 21 and 21b ... swinging pushers 21a and 21c ... bottom surface 22 (swinging pusher) ... coil springs 23 and 23a ... swinging shaft part 24 ... guide hole 25 ... nail support part 25a ... bottom face 26 ... contact end Part 26a ... Standing surface 26c ... Tip part 27 ... Pressing end part 28 ... Supporting part 30 ... Nail stopper 30a ... Body part 30b (of the nail stopper) ... End part 31 (of the nail stopper) ... Lower surface A1 (of the magazine body part) ... angle A2 (of the angle formed at the bottom of the nail support) ... angle R (of angle formed at the bottom of the swinging pusher) ... width S, Sa (of the swinging pusher) ... injection space (drive track)

Claims (2)

A nose portion having a cylindrical member that forms a drive trajectory of a driver that is driven to impact and having an opening for guiding a nail on the drive trajectory formed on a side wall of the cylindrical member;
A nail guide portion that allows sliding movement of the nail, and a nail introduced from an introduction opening formed at one end portion is connected to the nose portion and communicated with the open portion. A magazine body for guiding along the nail guide,
A pusher holder capable of sliding along a pusher guide portion formed in the magazine main body so as to correspond to the nail guide portion;
A swinging pusher that is supported by the pusher holder so as to be swingable and has a contact end that contacts the nail from the introduction opening side;
The contact end portion of the swing pusher is formed by a single plate that can enter the opening portion,
A power-driven nail driver characterized in that a nail support portion that comes into contact with the nail that slides and moves the nail guide portion from the nose portion side is provided at a position in the vicinity of the swing base shaft of the swing pusher. The power driven nail driver according to claim 1, wherein a contact surface of the nail support portion with the nail is configured by an inclined surface inclined from the nose portion side toward the introduction opening side. .

Images