JPH0639370U - Fastener magazine unit - Google Patents

Abstract

(57) [Summary] [Purpose] When the latch is released, the slider does not become free with respect to the magazine body, thereby preventing the slider from colliding with the magazine body. [Structure] The magazine main body of the straight sheath type fastener magazine unit in which the sheet-like connecting fastener is loaded from the side, and the magazine main body is movably attached in the front-rear axial direction, and when the front end position is reached with respect to the magazine main body, It is a slider to be latched, a pusher arranged between the magazine body and the slider, a pusher spring attached to the magazine body, and each engagement part provided on the pusher and the slider. And a hooking portion that hooks with each other when retracted with respect to the magazine body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a straight sheath type fastener magazine unit for laterally loading a connecting fastener in which a large number of fasteners are connected in parallel.

[0002]

[Prior art and its problems]

 Conventionally, a straight-sheath type nail magazine unit of a nailing machine for laterally loading a sheet-like connected nail in which a large number of nails (particularly, finishing nails having a small head diameter) are arranged in parallel and connected by an adhesive is a nailing machine. The magazine body is fixed to the wear plate of the nose unit and has a front end opening for feeding nails into the nose unit, and the side opening of the magazine body is attached to the magazine body so as to be movable in the longitudinal axis direction of the magazine body. The slider that opens and closes the slider, which is automatically latched in the magazine body when it reaches the front end position, and the connecting nail that is placed between the magazine body and the slider and is connected to the front end opening of the magazine body. It has a pusher that pushes inward and a pusher spring attached to the slider. Therefore, when the slider is not latched in the magazine body, the slider is free with respect to the magazine body. Therefore, when the operator releases the slider latch and points the rear of the nailer downward without pressing the slider by hand, the slider will collide with the slider stopper at the rear end of the magazine body. , Free fall, deformation and eventually damage. As a result, the nail magazine unit may fail to feed the nail.

[0003]

[Problems to be solved by the device]

 An object of the present invention is a fastener magazine unit used for a fastening tool, in which the slider does not become free with respect to the magazine body when the latch is released, thereby causing a collision between the slider and the magazine body. It is to provide a fastener unit that prevents

[0004]

[Means for Solving the Problems] The present invention is a straight-sheath type fastener magazine unit for laterally loading a connecting fastener in which a large number of fasteners are connected in parallel, and is a magazine body and a longitudinal axial direction of the magazine body. Mounted on the magazine body so that the slider is latched when it reaches the front end position with respect to the magazine body and the pusher that pushes the connecting fastener, which is arranged between the magazine body and the slider, to the front end opening of the magazine body. A pusher spring that has one end supported by the magazine body and the other end engaged with the pusher to urge the pusher forward, and the engagement parts provided on the pusher and the slider. It is characterized in that it includes a hooking portion which is hooked to each other when retracted with respect to the main body of the magazine.

[0005]

[Operation and effect of the device]

 When the fastener is exhausted and the pusher is at the front end position of the magazine unit and the slider is unlatched from the magazine body, the slider-side engaging portion immediately engages with the pusher-side engaging portion. Also, if the slider is unlatched when the fastener remains inside the magazine unit, the slider-side engaging part engages with the pusher-side engaging part at the part where the slider retracts slightly with respect to the magazine body. . As a result, the slider is constantly pushed toward the front end of the magazine body by the pusher spring, and does not become free with respect to the magazine body even if the latch is released.

[0006]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a pneumatic nailer equipped with a nail magazine unit according to an embodiment of the present invention mainly includes a nailer housing 1 having a substantially L-shape as a whole and a nailer housing. A striking cylinder / piston mechanism 3 arranged coaxially with and fixed to the main housing part 2 in the main housing part 2 formed as a front part of the housing 1, and a striking cylinder / piston mechanism fixed to the lower end of the main housing part 2. 3, a nose unit 4 that extends coaxially and ejects a nail, a driver 6 that extends as a piston rod of a striking piston 5 and reciprocates in the nose unit 4, and a striking cylinder / piston mechanism 3 that is disposed at the upper end of the striking cylinder. The head valve 7 for controlling the inflow of compressed air into the piston mechanism 3 and the exhaust from the striking cylinder / piston mechanism 3 and the upper end of the main housing part 2 are closed. A housing cap 8 forming a part of the head valve 7, a trigger valve 10 provided below the boundary between the grip portion 9 of the nailer housing 1 and the main housing portion 2 for controlling the opening / closing of the head valve 7, The trigger 11 is pivotally supported on the outer wall surface of the housing portion 2 for the operator to manually operate the trigger valve 10. The contact plate mechanically relates to the trigger 11 and reciprocates in the nose unit 4 in the axial direction of the nose unit 4. The movable contact arm unit 12 and a large number of nails fixed to the rear side wall surface of the nose unit 4 and extending rearward substantially parallel to the grip portion 9 (especially, the diameter of the head is slightly smaller than that of the shank portion). Magazine unit 13 for loading sheet-shaped connecting nails in which large-sized finishing nails are juxtaposed in parallel and joined together without a gap. Hereinafter, each part will be described in detail.

Nailer Housing: The nailer housing 1 comprises a main housing part 2 and a grip part 9. The inside of the grip portion 9 is integrated with a part of the inside of the main housing portion 2 and the inside of the housing cap 8 to form a compressed air storage chamber 14 surrounding the upper portion of the striking cylinder / piston mechanism 3. A vertical partition wall 15 extending in the longitudinal direction of the main housing portion 2 is provided at the boundary between the main housing portion 2 and the grip portion 9 in the lower portion inside the main housing portion 2. An oval shoulder 16 is formed in the axially intermediate portion of the inner wall surface of the main housing portion 2 including the vertical partition wall 15. The cylinder ring 17 is laterally fixed while being placed on the shoulder portion 16, and laterally positions the striking cylinder 18.

On the cylinder ring 17, a rubber-made oval horizontal partition wall / check valve unit 19 is mounted. The horizontal partition / check valve unit 19 is fixed in the longitudinal direction of the main housing portion 2 by a spacer 20 and a cylinder ring 17 which are fitted onto the striking cylinder 18. The horizontal partition / check valve unit 19 includes a relatively thick horizontal partition 19a and a check valve 19b that is thinner than the horizontal partition 19a and is provided on the inner circumference of the horizontal partition 19a. Become. The horizontal partition wall 19a closes and seals between the compressed air storage chamber 14 and the blowback compressed air storage chamber 21 formed inside the vertical partition 15 around the lower portion of the striking cylinder 18.

A grip cap 22 is fixed to the rear end of the grip portion 9 with a bolt (not shown). The grip cap 22 is provided with an air plug 23 for connecting via a hose (not shown) to an air compressor (not shown) existing outside the nailing machine. An annular shoulder portion 24, which is partially open toward the rear of the grip portion 9, is provided on the lower end side near the rear end of the inner wall surface of the grip portion 9. An annular shoulder portion 27 formed on the front end surface of the valve casing 26 of the relief valve 25 inserted from the rear of the grip portion 9 is in contact with the shoulder portion 24. The valve casing 26 is a stepped open-ended cylinder. The rear end surface of the valve casing 26 projects slightly rearward of the rear end surface 9a of the grip portion 9 and abuts on an annular shoulder portion 28 formed near the lower end of the inner wall surface of the grip cap 22. An outer flange 29 is formed near the rear end of the valve casing 26, and an O for sealing the compressed air storage chamber 14 is provided between the shoulder portion 28 on the grip cap 22 side and the rear end surface of the outer flange 29. The ring 30 is fitted. In the grip cap 22, a through hole 31 with a seat 34 is formed on the inner peripheral side of the shoulder portion 28. A stem-shaped relief valve element 32 is arranged in the valve casing 26. One end of the relief valve body 32 abuts on the seat 34 of the grip cap 22 and is constantly urged to close the inner end opening of the valve casing 26 by a compression coil spring 33 that sets a relief pressure.

Striking Cylinder / Piston Mechanism: The striking cylinder / piston mechanism 3 comprises a striking cylinder 18 having an oval cross section, and a striking piston 5 having a cross section substantially the same as the cross section of the striking cylinder 18. On the circumferential wall of the striking cylinder 18, a large number of air holes 35 having check valves 19b mounted on the outer wall surface are arranged in the circumferential direction of the striking cylinder 18 at approximately the middle portion in the longitudinal direction of the striking cylinder 18. There is. The inside of the striking cylinder 18 communicates with the blowback compressed air storage chamber 21 through an air hole 35. A large number of rectangular cutouts 36 are arranged at the lower end of the peripheral wall of the striking cylinder 18 in the circumferential direction of the striking cylinder 18. Due to these notches 36, the interior of the impact cylinder 18 communicates with the blowback compressed air storage chamber 21. This communication is ensured even when the striking piston 5 is stationary at the lower end. The lower end of the striking cylinder 18 is in contact with the upper surface of the oblong bumper 37 arranged on the inner bottom portion of the main cylinder portion 2. The upper end of the striking cylinder 18 abuts the lower end of an elliptical head valve cylinder 40 extending downward from the ceiling wall of the housing cap 8 via the spacers 38 and 39, whereby the striking cylinder 18 is moved to the main housing. It is fixed in the longitudinal direction of the part 2. The spacer 39 is arranged between the lower end of the head valve cylinder 40 and the spacer 38, and has notches (not shown) distributed in the circumferential direction. Due to this notch, when the head valve piston 44 of the head valve 7 rises, the compressed air storage chamber 14 and the striking piston upper chamber formed above the striking piston 5 inside the striking cylinder 18 communicate with each other. The striking cylinder 18 is an aluminum alloy cylindrical body having an oval cross section, and can be formed by extrusion molding according to the conventional technique except for cutting the air holes 35 and the notches 36.

The striking piston 5 has a piston ring fitting groove 43 for fitting the piston ring 41 and the back-up ring 42 on the outer peripheral wall thereof. The piston ring 41 is an oblong annular body with a rectangular cross section, is made of a synthetic resin having lubricity (for example, polyimide), and has a slit (Fig. (Not shown). The backup ring 42 is a conventional O-ring.

Driver: The driver 6 extends as a piston rod of the striking piston 5 and is blade-shaped.

Nose unit: The nose unit 4 has an acute isosceles isosceles triangle shape as a whole, which is narrowed toward the tip (lower end) when viewed from the front, and is located at the lower end of the main housing portion 2 of the nailing machine housing 1. It is fixed. To be precise, a wear plate 59, which is a rear member of the nose unit 4, is fixed to the lower end of the main housing portion 2, and a nose front cover 60 is detachably fixed to the wear plate 59 by bolts 61. The wear plate 59 is integrally assembled with the magazine body 63 of the magazine unit 13 by bolts 62. On the central axis of the wear plate 59, a driver guide path 64 through which the blade-shaped driver 6 reciprocates is formed. In the vicinity of the upper end portion of the wear plate 59, which is continuous with the driver guide path 64, a rectangular opening 65 extending along the driver guide path 64 and penetrating the wear plate 59 back and forth is provided.

On the other hand, between the nose front cover 60 and the wear plate 59, the rectangular plate-shaped contact plate 66 of the contact arm unit 12 forms a part of the driver guide path 64 and acts as a nail guide. A connecting piece 67, which is arranged so as to be slidable with the inner surface of the front cover 60 and projects rearward at the upper end of the contact plate 66, projects rearward from the opening 65 of the wear plate 59.

Head Valve: The head valve 7 is a three-way valve that is controlled to open and close by a differential pressure of air pressure, and has a head valve cylinder 40 and a vertical T-shaped vertical section inside the head valve cylinder 40. The head valve piston 44 is fixed between the hollow head valve piston 44, the inner wall surface of the recess 46 formed in the center of the peripheral ceiling wall 45 of the housing cap 8 and the central ceiling wall 47 of the housing cap 8. It includes a Linda cap 48 and a compression coil spring 49 arranged between the head valve cylinder cap 48 and the head valve piston 44. A control chamber 50 formed by the head valve cylinder 40, the head valve cylinder cap 48, and the head valve piston 44 communicates with an annular air passage 52 of the trigger valve 10 via an air passage 51 shown by a broken line. . At the upper end of the head valve cylinder cap 48, a plurality of exhaust holes 53 are distributed and arranged in the circumferential direction of the head valve cylinder cap 48. An exhaust hole 55 is also formed in the vertical wall 54 between the central ceiling wall 47 and the peripheral ceiling wall 45 of the housing cap 8. An annular exhaust cover 56 is attached to the outer periphery of the vertical wall 54. The exhaust cover 56 has a rectangular exhaust hole 57 at one location and can rotate 360 °. As a result, when the head valve piston 44 is at the lower limit position and the space between the striking piston upper chamber and the compressed air storage chamber 14 is closed, the hollow inside of the head valve piston 44 becomes the exhaust holes 53 and 55. It communicates with the atmosphere through the exhaust hole 57 of the exhaust cover 56. When the head valve piston 44 rises to the upper limit position, the upper end of the head valve piston 44 abuts on the bumper 58 fixed to the central ceiling wall 47 of the housing cap 8 so that the striking piston upper chamber and the compressed air storage chamber 14 are separated from each other. The air passages formed by the exhaust holes 53, 55 and 57 are closed. The ascent and descent of the head valve piston 44 are determined by whether the compressed air in the compressed air storage chamber 14 or the atmospheric pressure is introduced into the control chamber 50.

Trigger Valve: The trigger valve 10 is of a type conventionally used, and has a trigger valve cylinder 68 screwed and fixed to the grip portion 9, and an upward conical portion and a downward conical portion at the upper end. It consists of a poppet 69. The upper end of the poppet 69 is disengaged from the hole 70 at the upper end of the trigger valve cylinder 68, and the lower end of the poppet 69 projects in and out from the lower end surface of the trigger valve cylinder 68. When the poppet 69 is pushed up by the trigger 11, the upward conical portion of the poppet 69 comes into contact with the peripheral edge of the hole 70 to close the hole 70, and the downward conical portion of the poppet 69 separates from the O-ring 71, so that the control chamber 50 is closed to the compressed air storage chamber 14 and is open to the atmosphere at the same time. On the other hand, when the trigger 11 is released, the opposite positional relationship occurs.

Trigger and Trigger Lock Mechanism: The trigger 11 is pivotally supported on the grip portion 9 by the pin 72 in the vicinity of the outer wall surface of the main housing portion 2 as described above. On the side of the finger-holding portion 73 of the trigger 11, the lock body 75 of the trigger lock mechanism 74, which faces the finger-holding portion 73, is provided on the lower surface side of the grip portion 9 in the recess 76 of the boss portion 96 formed on the outer wall surface thereof. It has been inserted.

The trigger 11 has a U-shaped cross section, has a downward spring receiving surface 78 at its pivot end, and is provided near the pivot end to operate the trigger valve 10 on the right and left rising walls 79. A bearing hole for supporting a pin 81 pivotally supporting the top 80 is provided, and a spring receiver 83 protruding in the lateral direction is provided on one rising wall 79 on the side closer to the finger-holding portion 73 than the bearing hole. . A spring receiving boss 84 protruding upward is provided at the front end of the finger hook 73 between the ascending walls 79 of the trigger 11. A step 85 is formed in a substantially middle portion of the rising wall 79 so that the finger hanging portion 73 side is lowered.

A top 80 is pivotally supported by the pin 81. A torsion coil spring 86 is attached to the top 80, one end of which is engaged with the top 80 and the other end is bent into a U shape, and an operating end member 87 of the contact arm unit 4 and a spring receiver 83 are provided. Is engaged with. When the tip of the contact plate 66 is brought into contact with the nail driving material and the tip of the contact plate 66 is retracted to the tip of the wear plate 59 of the nose unit 4, the operating end member 87 of the contact arm unit 4 is replaced with the torsion coil spring 86. The end is pushed up and brought into contact with the spring receiver 78. As a result, the spring force of the torsion coil spring 86 is strengthened, and the top 80 is urged clockwise in FIG. 1 to a position where it can be engaged with the lower end of the poppet 69 of the trigger valve 10. On the contrary, if the operator pulls the trigger 11 before pressing the tip of the contact plate 66 against the nail driving material, the top 80 rotates counterclockwise together with the trigger 11 and engages with the lower end of the poppet 69. It will rotate to a position that does not exist. Therefore, even if the tip of the contact plate 66 is pressed against the nail driving material, the comma 80 does not push up the poppet 69.

The trigger lock mechanism 74 includes a trigger lock body 75, a compression coil spring 88 disposed between the trigger lock body 75 and the spring receiving boss 84 of the trigger 11, and a boss portion 96 of the grip portion 9. And the formed concave portion 76. The trigger lock main body 75 includes a handle portion having a fan-shaped peripheral surface, a single-bottomed cylindrical portion 90 protruding upward from the handle portion, and an outer peripheral surface of the single-bottomed cylindrical portion 90 on the upper surface of the handle portion 89. And a positioning key portion (not shown) projecting laterally from. The handle portion has a finger hook portion (not shown) provided with serrations at one end in the circumferential direction, a short cylindrical spring bearing 93 that is coaxial with the cylindrical portion 90 with one bottom and projects downward, and a spring bearing 93. It has a locking block 94 that projects laterally therefrom and is in the first position in the rotational direction, and two grooves (not shown) that extend in parallel on both sides of the spring receiver 93. One of the grooves is an unlocking groove located at the first position in the rotating direction, and the other groove is a lightening groove. Further, the outer edge shape of the handle portion is substantially the same as the circular rear end portion shape of the boss portion 96 extending from the main housing portion 2 to the rear of the grip portion 9 on the lower surface side of the boundary portion between the main housing portion 2 and the grip portion 9. The outer edge of the handle portion is only slightly protruding from the circular rear end portion of the boss portion 96 when the trigger lock main body 75 is inserted into the recess 76 and has the same curvature. Therefore, when the operator puts his / her index finger on the finger rest, there is no discomfort that the handle portion projects from the boss portion 96 of the grip portion 9. The positioning key part has slopes on the left and right from the upper end to the lower end, and has a triangular flat part in the middle.

On the other hand, the recess 76 has a cylindrical recess into which the bottomed cylindrical portion 90 of the trigger lock body 75 is inserted, and a key hole (not shown) into which the key portion of the trigger lock body 75 is inserted. It is provided. At the center of the bottom of the key hole, there is provided a ridge (not shown) having a triangular cross-section extending radially outward from the cylindrical recess, and grooves (not shown) on both sides of the ridge. ) Has been formed. By the rotation of the trigger lock main body 75, the flat portion of the key portion is inserted and positioned in any of these grooves. As a result, either one of the unlock groove of the handle portion and the lock block 94 faces the trigger 11, and it is determined whether the trigger 11 is unlocked or locked. As shown in FIG. 1, the compression coil spring 88 is conventionally used as a return spring of the trigger 11, and the trigger lock main body 75 is a spring bearing of the compression coil spring 88 on the nailing machine housing 1 side. Has become. Thus, the trigger lock mechanism 74 is substantially the only component of the trigger lock body 75, and the other components can be said to be adapted from the existing ones.

As shown in FIG. 1, when the handle portion 89 is positioned so that the locking block 94 faces the trigger 11, the rising wall of the trigger 11 is the locking block 94. Since the rotation is blocked, even if the tip of the contact plate 66 is pressed against the nail driving material and retracts to the tip of the wear plate 59, the top 80 does not come into contact with the lower end of the poppet 69. On the other hand, when the handle portion 89 is positioned so that the unlock groove faces the trigger 11, the trigger 11 can enter the unlock groove and can be pulled. When the plate 66 is pressed against the nail driving material and then the trigger 11 is pulled, the top 80 contacts the lower end of the poppet 69 and pushes up the poppet 69.

Contact arm unit: As described in the section of the nose unit 4, the contact arm unit 12 includes a rectangular plate-shaped contact plate 66 of the contact arm unit 12 between the nose front cover 60 and the wear plate 59. Is formed so as to form a part of the driver-provided inner passage 64 and to act as a nail guide so as to be slidable with the inner surface of the nose front cover 60, and a connecting piece 67 protruding rearward is provided at the upper end of the contact plate 66. The wear plate 59 projects rearward from the opening 65. The rear end portion of the connecting piece 67 of the contact plate 66 is only fitted into the rectangular groove 105 formed in the contact portion 104 of the contact arm unit 12 and extending in the longitudinal direction of the grip portion 9. The joining portion 104 is joined to the L-shaped actuating end member 87 via the adjusting dial 106 so as to reciprocate integrally in the vertical direction. In this way, since the contact plate 66 is arranged inside the nose unit 4 and the connecting piece 67 also projects rearward from the opening 65 of the wear plate 59, there is no business trip around the nose unit 4. The cornering performance of the nail driver is improved. Further, since the connecting piece 67 connects the contact plate 66 and the operating end member 87 only by inserting the connecting piece 67 into the rectangular groove 105 of the joining portion 104, even when the nail is clogged in the driver guide path 64 of the nose unit 4, The nose unit 4 and the contact arm unit 12 can be easily disassembled and the nails can be easily removed. Subsequent assembly of the nose unit 4 and the contact arm unit 12 is easy.

Magazine Unit 13: The magazine unit 13 is fixed to the wear plate 59 and has a C-shaped cross-section main body 63, and upper and lower walls 63a and 63b of the main body 63 of the magazine. A slider 110 is attached to the magazine main body 63 so as to be reciprocally movable forward and backward, and opens a side surface of the magazine main body 63 when the magazine main body 63 is moved rearward. As described above, the magazine unit 13 is of a lateral loading type in which the nails are loaded into the magazine body 63 from the side. On the inner wall surface of the magazine body 63, a plurality of nail head guide grooves having a rectangular cross section for guiding the movement of the nail heads in accordance with the lengths of the plurality of kinds (7 kinds in FIG. 2) used. 111 is extended in the front-back direction. In the lower part of the inner wall surface of the magazine body 63, a pusher guide inner groove 112 having a rectangular cross section is provided extending in the front-rear direction. The pusher 113 is attached to the inner wall surface of the magazine body 63 so as to be reciprocally movable in the front-rear direction. At the rear end of the magazine body 63, there is provided a rear wall portion 115 which is integrally formed with a hanger 116 connected to the rear end of the grip portion 9 and projects toward the slider 110. A short cylindrical spring receiver 114 is provided at the rear end of the pusher 113. A compression coil spring 117 is arranged between the rear wall portion 115 of the magazine body 63 and the spring receiver 114 of the pusher 113, and always urges the pusher 113 toward the nose unit 4. A pusher stopper 118 is provided integrally with the rear wall portion 115 of the magazine body 63 so as to come into contact with the rear surface of the body 113a of the pusher 113. A pusher lock lever 119 is pivotally supported by a member integrated with the pusher stopper 118 on the side closer to the inner wall surface of the magazine body 63 than the pusher stopper 118, and is biased counterclockwise in FIG. 1 by a torsion coil spring 120. . At the front end of the pusher lock lever 119, a claw 122 that engages with a hook portion 121 having a triangular cross section provided on the upper surface of the pusher 113 is provided slightly forward of the spring receiver 114 of the pusher 113. The claw 122 is a rectangular plate extending in the horizontal axis direction of the pusher lock lever 119. On the other hand, the hook portion 121 has a slope 121a that gradually increases from the rear portion of the pusher 113 toward the front portion. At the upper end of the pusher lock lever 119 in the front-rear direction, a rectangular claw 123 that projects upward and releases the pusher lock projects in the lateral axis direction of the pusher lock lever 119. The claw 123 is formed as an inclined plate that gradually lowers from the rear portion to the front with respect to the vertical axis of the pusher lock lever 119. The lower surface of the claw 123 is fixed to the slider 110 side and is disengaged from the upper surface of the unlocking claw 125 protruding toward the magazine body 63. In the vicinity of the front end of the pusher 113, a rectangular hooking piece 126 protruding toward the inner wall surface of the slider 110 is provided. The locking piece 126 engages with the rear surface side of the front wall portion 127 of the slider 110 on the front surface side thereof.

When the operator loads the connecting nail into the magazine unit 13, when the slider 110 is unlatched and pulled rearward with respect to the magazine body 63, the front wall portion of the slider 110 is locked by the pusher 113. While being compressed by the piece 126 and compressing the compression coil spring 117, it is moved backward together with the slider 110. When the slider 110 is pulled until it comes close to the rear end position with respect to the magazine body 63, the inclined surface 121a of the hook portion 121 of the pusher 113 comes into contact with the lower surface of the claw 122 of the pusher lock lever 119, and the slider 110 of the slider 110 moves. Along with the backward movement, the claw 122 is pushed up and the pusher lock lever 119 is rotated clockwise in FIG. When the slider 110 is pulled to the rearmost position with respect to the magazine body 63, the pusher 113 abuts on the pusher stopper 118 and the claw 122 engages with the front surface of the hook portion 121 of the pusher 113. On the other hand, if the slider 110 is pushed forward with respect to the magazine body 63 after the operator has loaded the connecting nails from the side surface of the magazine body 63, the pusher 113 remains locked behind the magazine body 63. The slider 110 does not receive the force of the compression coil spring 117 and moves forward only by the force of the operator's hand. When the front wall of the slider 110 approaches the wear plate 59, the lock release claw 125 engages with the claw 123 of the pusher lock lever 119 to rotate the pusher lock lever 119 in the clockwise direction in FIG. The engagement between 121 and the claw 122 is released, and the pusher 113 is unlocked. As a result, the pusher 113 is pushed by the compression coil spring 117 and comes into contact with the tailmost nail of the connecting nails loaded in the magazine body 63.

The slider 110 has a plurality of (six in FIG. 2) grooves 127 corresponding to each nail head guide groove 111 and extending in the front-rear direction of the slider 110. One nail head pressing bar 128 for pressing the nail head is arranged to extend in the front-rear direction of the slider 110 so as to face each groove 127.

A hexagonal rear wall 129 is attached to the rear end of the slider 110 by a bolt (not shown). An L-shaped hexagon wrench (not shown) extending from the rear wall 129 in the longitudinal direction of the slider 110 is housed. On the rear surface of the rear wall 129, there is formed an inclined portion 130 for storing or taking out the short arm portion of the L-shaped wrench while rotating.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a pneumatic nailer equipped with a nail magazine unit according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a vertical sectional view of the nail magazine unit of FIG.

FIG. 4 is a vertical cross-sectional view of the rear end portion of the nail magazine unit of FIG.

[Explanation of symbols]

 13 magazine unit 63 magazine body 110 slider 113 pusher 117 compression coil spring (pusher spring) 126 latching piece (engaging part)

Claims (1)

[Scope of utility model registration request] 1. A straight sheath type fastener magazine unit for laterally loading a connecting fastener in which a plurality of fasteners are connected in parallel, and is attached to the magazine body so as to be movable in a longitudinal axis direction of the magazine body. When the slider reaches the front end position with respect to the magazine body, the slider is latched, the pusher that is placed between the magazine body and the slider and pushes the connecting fastener to the front end opening of the magazine body, and one end is supported by the magazine body. When the slider is unlatched and retracts with respect to the magazine body, the pusher spring has the other end engaged with the pusher and biases the pusher forward, and the respective engaging portions provided on the pusher and the slider. , A fastener magazine unit including engaging portions that engage with each other.