JP2549632Y2 - Nail magazine unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight-sheath type nail magazine unit in which a plurality of nails are arranged side by side and loaded with connecting nails connected in parallel.

[0002]

2. Description of the Related Art Conventionally, a nailing machine has a straight sheath type in which a large number of nails (particularly, finishing nails having a small head diameter) are arranged side by side and sheet-like connecting nails connected by an adhesive are loaded from the side. A magazine unit, which can be loaded with various types of sheet-like connecting nails divided into a plurality of types according to the length of the nail, is fixed to a wear plate of a nose unit of a nailing machine, and feeds the nail into the nose unit at a front end. A magazine body having a plurality of nail head guide grooves formed in parallel between the upper and lower sides in the width direction, and a magazine body attached to the magazine body movably in the front-rear axis direction of the magazine body. A slider for automatically opening and closing the side opening of the slider, the slider being automatically latched to the magazine body when the slider reaches the foremost position, and being movable integrally with the slider. A plurality of nail head holding bars, each mounted on the slider and extending between the magazine body and the slider and arranged at substantially the same height as the lower surface of the upper side wall of each nail head guide groove, the magazine body and the slider And a pusher that is disposed between the slider and pushes the connecting nail toward the front end opening of the magazine body, and a pusher spring attached to the slider. In the conventional nail magazine unit, the feet of the finished nail are guided by the lower wall of the magazine main body and the opposing inner surfaces of the magazine main body and the slider, and the nail is held down by the nail head holding bar. After the unlatched slider is pulled rearward with respect to the magazine main body to open the side surface of the magazine main body, a nail driver loads a sheet-like connecting nail into the magazine main body in a transverse manner, and slides the slider in the magazine main body. When pushing forward, in order to prevent the tip of the nail head holding bar from being caught on the last nail of the sheet-like connecting nail, the part that continues from the front end of the nail head holding bar to the front end of the side face facing the magazine body is , Are formed in an arc shape. For this reason, there is a disadvantage that the head of the second nail located at the position next to the leading nail arranged in the driver guide path of the nose unit cannot be sufficiently pressed, so that the second nail is also rod-shaped at the same time as the leading nail. Sometimes hit by a driver and jammed in the driver guideway of the nose unit.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a tip of a nail head holding bar from being caught by a connecting nail when a connecting nail is loaded and to prevent the tip of a bar from being caught by the connecting nail in a driver guideway in a nose unit. An object of the present invention is to provide a nail magazine unit having a nail head holding bar for preventing clogging of nails.

[0004]

SUMMARY OF THE INVENTION The present invention is a straight-sheath type nail magazine unit in which a large number of nails are arranged side by side and a connecting nail in which a plurality of nails are connected in parallel is provided. A main body provided with the slider, a slider attached to the magazine main body so as to be movable in the front-rear axis direction of the magazine main body, and a side face extending from the front end in the front-rear axis direction of the slider and extending halfway from the front end of the slider attached to the slider. A nail magazine unit having a nail head holding bar facing the
A leaf spring fixed to the slider and biasing the nail head holding bar toward the magazine body; and a cam member fixed to the magazine body and detachable from the nail head holding bar, wherein the slider is at the forefront with respect to the magazine body. When the slider is in the position, the front end of the cam member is located behind the rear end of the nail head holding bar, and with the advancement of the slider from the rearmost position with respect to the magazine body, the nail head holding bar moves with the cam member. After moving forward from the connecting nail loaded in the magazine body to the slider side while making contact with a gap, it is separated from the cam member and allowed to advance toward the magazine body by the force of the leaf spring, and the forefront to the magazine body is allowed. A nail member which engages with the nail head holding bar as the slider is retracted from the position and which acts to retract from the magazine body by the sum of the thickness of the connecting nail and the gap. That.

[0005]

When the slider is at the foremost position with respect to the magazine body and completely closes the side opening of the magazine body, the nail head holding bar is disengaged from the cam member. Therefore, the nail head holding bar is urged toward the magazine main body by the leaf spring until the side surface contacts the inner wall surface of the magazine main body. As a result, the nail head holding bar contacts the upper surface of the head of the connecting nail to prevent the nail from floating.
When the nailing operator loads the connecting nail into the magazine body and advances the slider while the slider is at the rearmost position with respect to the magazine body, the slider first moves from the connecting nail to the slider side while contacting the cam member. Move forward with a gap. For this reason, the nail head holding bar smoothly advances integrally with the slider without being caught by the connecting nail (especially the last nail). When the slider advances a predetermined distance in the front-rear axial direction of the magazine main body, the nail head holding bar is disengaged from the cam member, and is pressed against the connecting nail loaded in the magazine main body by a leaf spring.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 2, a pneumatic nailer having a nail magazine unit according to an embodiment of the present invention mainly includes a nailer housing 1 having a substantially L-shaped overall profile and a nailer. The main housing part 2 is formed in a main housing part 2 formed as a front part of the machine housing 1.
And a nose unit 4 fixed to the lower end of the main housing portion 2 and extending coaxially with the impact cylinder / piston mechanism 3 to eject a nail, and a piston rod of an impact piston 5 And a driver 6 which extends and reciprocates in the nose unit 4 and controls the inflow of compressed air into the striking cylinder / piston mechanism 3 and the exhaust from the striking cylinder / piston mechanism 3 which is arranged at the upper end of the striking cylinder / piston mechanism 3. A head valve 7 which is closed, a housing cap 8 which closes the upper end of the main housing part 2 and forms a part of the head valve 7, and is provided below the boundary between the grip part 9 of the nail driving machine housing 1 and the main housing part 2. A trigger valve 10 for controlling the opening and closing of the head valve 7, and an A trigger 11 for manually operating the valve 10, a contact arm unit 12 mechanically associated with the trigger 11, a contact plate 12 in which a contact plate reciprocates in the nose unit 4 in the axial direction of the nose unit 4, and a rear side of the nose unit 4 A sheet in which a large number of nails (particularly finishing nails whose head diameter is slightly larger than the shank diameter) are fixed to the wall surface and extend rearward substantially parallel to the grip portion 9 and are joined in parallel without gaps. And a magazine unit 13 for loading the connection nails. Hereinafter, each part and its related parts will be described in detail.

Nailer housing: Nailer housing 1
Consists of 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, and is a striking cylinder / piston mechanism including the striking piston 5 having an oblong cross section and the striking cylinder 18 having an oblong cross section. A compressed air storage chamber 14 surrounding the upper part of 3 is formed. A vertical partition 15 extending in the longitudinal axis direction of the main housing part 2 is provided at a boundary between the main housing part 2 and the grip part 9 at a lower portion inside the main housing part 2. An oblong shoulder 16 is formed at an axially middle portion of the inner wall surface of the main housing portion 2 including the vertical partition wall 15. Cylinder ring 17 is shoulder 16
The impact cylinder 1 is fixed laterally while being mounted on the
8 is performed in the horizontal direction.

On the cylinder ring 17, an oblong horizontal partition wall / check valve unit 19 made of rubber is mounted. The horizontal bulkhead / 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 externally inserted into the impact cylinder 18. The horizontal bulkhead / check valve unit 19 is a relatively thick horizontal bulkhead 1.
9a and the horizontal partition 1 are thinner than the horizontal partition 19a.
9a, and a check valve portion 19b provided on the inner periphery of 9a. The horizontal partition wall 19a closes and seals the space between the compressed air storage chamber 14 and the compressed air storage chamber 21 for blowback formed around the lower part of the impact cylinder 18 and inside the vertical partition wall 15.

A grip cap 22 is fixed to the rear end of the grip portion 9 by bolts (not shown).
The grip cap 22 is provided with an air plug 23 for connection via a hose (not shown) to an air compressor (not shown) existing outside the nailing machine. At the lower end near the rear end of the inner wall surface of the grip portion 9, a grip portion 9 is provided.
A rearwardly open annular shoulder 24 is provided. An annular shoulder 27 formed on the front end surface of the valve casing 26 of the relief valve 25 inserted from behind the grip 9 is in contact with the shoulder 24. The valve casing 26 is a stepped open-end cylinder. The rear end surface of the valve casing 26 is larger than the rear end surface 9a of the grip portion 9.
It protrudes slightly rearward, and is in contact with an annular shoulder 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-ring for sealing the compressed air storage chamber 14 is provided between the shoulder 28 on the grip cap 22 side and the rear end surface of the outer flange 29. 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 28. In the valve casing 26, a stem-shaped relief valve body 32 is arranged. One end of the relief valve body 32 abuts against the seat 34 of the grip cap 22 and is constantly urged by a compression coil spring 33 that sets the relief pressure so as to close the inner end opening of the valve casing 26.

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. A plurality of air holes 35 each having a check valve 19b mounted on the outer wall surface are distributed in the circumferential direction of the striking cylinder 18 at a substantially middle portion of the striking cylinder 18 in the longitudinal direction of the striking cylinder 18. . The inside of the impact cylinder 18 communicates with the blowback compressed air storage chamber 21 through the air hole 35. At the lower end of the peripheral wall of the striking cylinder 18, a number of rectangular cutouts 36 are dispersedly arranged in the circumferential direction of the striking cylinder 18. The inside of the impact cylinder 18 communicates with the blow-back compressed air storage chamber 21 by these notches 36. This communication is ensured even when the striking piston 5 is stationary at the lower end. The lower end of the impact cylinder 18 is connected to an oval-shaped bumper 37 disposed on the inner bottom of the main cylinder 2.
Is in contact with the upper surface. The upper end of the impact cylinder 18 abuts on the lower end of an oblong head valve cylinder 40 extending downward from the ceiling wall of the housing cap 8 via spacers 38 and 39, whereby the impact cylinder 18 is connected to the main housing. The portion 2 is fixed in the vertical axis direction. The spacer 39 includes a head valve cylinder 40
It has cutouts (not shown) that are arranged between the lower end of the spacer and the spacer 38 and are 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 communicates with the upper piston chamber formed above the striking piston 5 inside the striking cylinder 18. The striking cylinder 18 is a cylindrical body made of an aluminum alloy having an oval cross section, and has an air hole 35 and a notch 3.
Except for the cutting work of No. 6, it can be made by extrusion according to the prior art.

The impact piston 5 has a piston ring fitting groove 43 for fitting a piston ring 41 and a backup ring 42 on an outer peripheral wall thereof. The piston ring 41 is an oblong body having a rectangular cross section, is made of a synthetic resin having lubricity (for example, polyimide), and has a slit (not shown) in an annular portion forming one end side in the long axis direction. ). The backup ring 42
It is a conventional O-ring.

Driver: The driver 6 extends as a piston rod of the striking piston 5 and has a blade shape.

Nose unit: The nose unit 4
The shape as viewed from the front is an acute isosceles triangular shape as a whole, which becomes narrower toward the tip (lower end).
Is fixed to the lower end of the main housing part 2 of the main body. To be more precise, a wear plate 59 serving as a rear member of the nose unit 4 is fixed to the lower end of the main housing portion 2, and the 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 main body 63 of the magazine unit 13 by bolts 62. A driver guide path 64 on which the blade-shaped driver 6 reciprocates is formed on the center axis of the wear plate 59. A rectangular opening 65 that extends along the driver guide path 64 and penetrates the wear plate 59 back and forth is provided near the upper end of the wear plate 59 so as to be continuous with the driver guide path 64.

On the other hand, a rectangular plate-like contact plate 66 of the contact arm unit 12 forms a part of the driver guide path 64 between the nose front cover 60 and the wear plate 59, and functions as a nail guide to act as a nail guide. Cover 6
The connection piece 67 is disposed so as to be slidable with the inner surface of the contact plate 66 and protrudes rearward at the upper end of the contact plate 66.
Project 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. The head valve cylinder 40 and the head valve cylinder 40 have an inverted T-shaped vertical section. The hollow head valve piston 44 and the ceiling wall 4 around the housing cap 8
5, a head valve cylinder cap 48 fixedly disposed between an inner wall surface of a convex portion 46 formed substantially at the center and a center ceiling wall 47 of the housing cap 8, a head valve cylinder cap 48 and a head valve piston 44.
And a compression coil spring 49 disposed therebetween. 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 dispersedly 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 center ceiling wall 47 and the peripheral ceiling wall 45 of the housing cap 8. A rubber elastic 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 °. Accordingly, when the head valve piston 44 is at the lower limit position and closes the space between the upper piston chamber and the compressed air storage chamber 14, the hollow interior of the head valve piston 44 has the exhaust holes 53 and 55.
And an exhaust hole 57 of the exhaust cover 56 to communicate with the atmosphere. When the head valve piston 44 has moved up to the upper limit position, the upper end of the head valve piston 44 has a bumper 58 fixed to the center ceiling wall 47 of the housing cap 8.
To open the space between the upper piston chamber and the compressed air storage chamber 14 and close the air passage formed by the exhaust holes 53, 55 and 57. The rise and fall of the head valve piston 44 is determined by whether the compressed air in the compressed air storage chamber 14 or the atmosphere is introduced into the control chamber 50.

Trigger Valve: The trigger valve 10 is of a conventionally used type, 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. And a poppet 69. The upper end of the poppet 69 is the trigger valve cylinder 6
The lower end of the poppet 69 protrudes and retracts with respect to 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 periphery of the hole 70 and
And the downward conical portion of the poppet 69 is separated from the O-ring 71, and the control chamber 50 is connected to the compressed air storage chamber 14.
And 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 by the grip 9 in the vicinity of the outer wall surface of the main housing 2 by the pin 72 as described above. On the side of the finger hook 73 of the trigger 11, the lock body 75 of the trigger lock mechanism 74 faces the finger hook 73, and fits into the concave portion 76 of the boss 96 formed on the outer wall surface of the lower surface of the grip 9. Has been inserted.

The trigger 11 has a U-shaped cross section, has a downwardly facing spring receiving surface 78 at the pivot end, and has a left and right rising wall 79 near the pivot end for operating the trigger valve 10. A bearing hole for supporting a pin 81 pivotally supporting the pin 80 is provided, and a spring receiver 83 is provided on one of the rising walls 79 on the side closer to the finger hook 73 than the bearing hole. Between both rising walls 79 of the trigger 11,
A spring receiving boss 84 protruding upward is provided at the front end of the finger hook 73. At a substantially intermediate portion of the rising wall 79, a step 8 formed so that the side of the finger hook 73 is lowered.
5 are formed.

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 in a U-shape, and the working end member 87 of the contact arm unit 4 is provided.
And the spring receiver 83. Contact plate 66
When the tip of the contact plate 66 abuts against the nail driving material and the tip of the contact plate 66 retracts to the tip of the wear plate 59 of the nose unit 4, the operating end member 8 of the contact arm unit 4
7 pushes up the other end of the torsion coil spring 86, and
8 Thereby, 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 engage with the lower end of the poppet 69 of the trigger valve 10. Conversely, when the operator touches the contact plate 66
If the trigger 11 is pulled before the tip of the trigger is pressed against the nail driving member, the top 80 rotates counterclockwise together with the trigger 11 and rotates to a position where it cannot engage with the lower end of the poppet 69. For this reason, even if the tip of the contact plate 66 is pressed against the nailing material,
Never push up.

The trigger lock mechanism 74 includes a trigger lock body 75 and a compression coil spring 88 disposed between the trigger lock body 75 and the spring receiving boss 84 of the trigger 11.
And a concave portion 76 formed in the boss portion 96 of the grip portion 9. The trigger lock body 75 includes a handle portion 89 having a fan-shaped peripheral surface, a single-bottomed cylindrical portion 90 protruding upward from the handle portion 89, and an outer side of the single-bottomed cylindrical portion 90 on the upper surface of the handle portion 89. And a positioning key (not shown) projecting laterally from the peripheral surface. Handle part 8
Reference numeral 9 denotes a finger hook (not shown) provided with a serration at one end in the circumferential direction, a short cylindrical boss 93 coaxial with the single-bottomed cylindrical portion 90 and protruding downward, and a side extending from the short cylindrical boss 93. It has a locking block 94 projecting in the first direction in the rotational direction and two grooves (not shown) extending in parallel on both sides of the short cylindrical boss 93. One of the grooves is an unlocking groove at the first position in the rotation direction, and the other groove is a lightening groove. The outer edge shape of the handle portion 89 is as follows.
On the lower surface side of the boundary between the main housing portion 2 and the grip portion 9, the trigger has a shape substantially equal in curvature to the circular rear end shape of the boss portion 96 extending rearward from the grip portion 9 from the main housing portion 2. With the lock body 75 inserted into the concave portion 76, the outer edge of the handle portion 89 slightly protrudes from the circular rear end of the boss portion 96. Therefore,
When the operator puts the index finger on the finger hook portion 92, there is no uncomfortable feeling that the handle portion 89 protrudes from the boss portion 96 of the grip portion 9. The positioning key has left and right inclined surfaces (not shown) from the upper end to the lower end, and has a triangular flat portion (not shown) in the middle.

On the other hand, the trigger lock body 7 is
5 is provided with a cylindrical concave portion into which the single-sided cylindrical portion 90 is inserted, and a key hole portion (not shown) into which the key portion of the trigger lock body 75 is inserted. At the center of the bottom of the key hole, a ridge (not shown) having a triangular cross section is provided at the center thereof and extends radially outward from the cylindrical recess. ) Is formed. By the rotation of the trigger lock body 75, the flat portion of the key portion is inserted and positioned in any of these grooves. As a result, one of the unlocking groove of the handle portion 89 and the lock block 94 faces the trigger 11, and it is determined whether the trigger 11 is unlocked or locked.

Contact Arm Unit: The contact arm unit 12 has the rectangular contact plate 66 of the contact arm unit 12 between the nose front cover 60 and the wear plate 59 as described in the section of the nose unit 4. A connecting piece 67 which forms a part of the driver guide path 64, acts as a nail guide, is slidable with the inner surface of the nose front cover 60, and projects rearward at the upper end of the contact plate 66 is a wear plate. 59 protrudes rearward from the opening 65. The rear end of the connecting piece 67 of the contact plate 66 is simply inserted into a rectangular groove 105 formed in the joint 104 of the contact arm unit 12 and extending in the longitudinal direction of the grip 9. The joint 104 is connected to the L
It is coupled to the U-shaped operating end member 87 so as to reciprocate integrally in the vertical direction. As described above, 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 nailing machine is improved. In addition, the connecting piece 67
Since the contact plate 66 and the working end member 87 are connected only by being inserted into the rectangular groove 105 of the joining portion 104, even if 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 is easy to disassemble, and the nail is easily removed. Subsequent nose unit 4 and contact arm unit 12
Is easy to assemble.

Magazine unit: Magazine unit 1
Reference numeral 3 denotes a magazine body 63 fixed to the wear plate 59 and having a C-shaped cross section, and a front-rear direction with respect to the magazine body 63 along a groove extending in the front-rear direction of the upper wall 63a and the lower wall 63b of the magazine body 63. And a slider 110 that opens the side opening of the magazine body 63 when moved rearward. in this way,
The magazine unit 13 is of a horizontal insertion type in which nails are loaded into the magazine body 63 from the side. A plurality of types (seven types in FIG. 4) are used on the inner wall surface of the magazine body 63.
A plurality of nail head guide grooves 111 having a rectangular cross section for guiding the movement of the nail head according to the length of the nail are extended in the front-rear direction. A pusher guide groove 112 having a rectangular cross section extends in the front-rear direction below the inner wall surface of the magazine body 63. The pusher 113 is attached to the inside wall surface of the magazine body 63 so as to be able to reciprocate in the front-rear direction. The rear end of the magazine body 63 is provided with a rear wall 115 that projects toward the slider 110 integrally with the hanger 116 connected to the rear end of the grip 9. At the rear end of the pusher 113, a short cylindrical spring receiver 114 is provided. Spring receiver 1 of rear wall 115 and pusher 113 of magazine body 63
A compression coil spring 117 is disposed between the nose unit 4 and the compression coil spring 117. A pusher stopper 118 is provided integrally with the rear wall 115 of the magazine main body 63 and abuts against the rear surface of the main body 113a of the pusher 113. On the side closer to the inner wall surface of the magazine body 63 than the pusher stopper 118, a pusher lock lever 119 is pivotally supported by a member integral with the pusher stopper 118, and is urged by a torsion coil spring 120 in a counterclockwise direction in FIG. . Pusher lock lever 119
Is provided with a claw 122 which engages with a hook portion 121 having a triangular cross section provided on the upper surface of the pusher 113 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 to the front of the pusher 113. At the upper end of the pusher lock lever 119 in the middle in the front-rear direction, a rectangular claw 123 projecting upward and releasing the pusher lock projects in the horizontal axis direction of the pusher lock lever 119. The claw 123 is formed as an inclined plate that gradually decreases from the rear to the front with respect to the longitudinal axis of the pusher lock lever 119. The claw 123 has its lower surface fixed to the slider 110 side and the magazine body 6.
The lock release claw 125 protrudes toward 3 and is disengaged from the upper surface side. In the vicinity of the front end of the pusher 113, a rectangular engaging piece 126 protruding toward the inner wall surface of the slider 110 is provided. The locking piece 126 has a slider 110 on its front side.
Of the front wall (not shown).

When the operator loads the sheet-like connecting nail into the magazine unit 13 and the slider 110 is released from the latch and is pulled rearward with respect to the magazine body 63, the front wall of the slider 110 engages with 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 toward the rear end position with respect to the magazine body 63, the slope 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 moves backward. With the 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 rear end position with respect to the magazine main body 63, the pusher 113 comes into contact with the pusher stopper 118, and the pawl 122 engages with the hook portion 12 of the pusher 113.
It engages with the front of 1. On the other hand, after the operator loads the sheet-like connecting nail from the side of the magazine body 63, the slider 11
When 0 is pushed forward with respect to the magazine main body 63, the pusher 113 remains locked at the rear end position with respect to the magazine main body 63, so that the force of the compression coil spring 117 is not applied to the sheet-like connecting nail. And slider 1
10 moves forward only by the force of the operator's hand without receiving the force of the compression coil spring 117. 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 clockwise in FIG.
When the slider 110 reaches its front end position, the pusher 1
13 is disengaged from the hook portion 121 and the claw 122, and the lock of the pusher 113 is released. As a result, the pusher 113 is pushed by the compression coil spring 117 and abuts on the last nail of the sheet-like connecting nail loaded in the magazine body 63.

Sliders: A plurality of the sliders 110 (six in FIG. 4) corresponding to each of the nail head guide grooves 111.
The groove 127 extends in the front-rear direction of the slider 110. Opposite to each groove 127, each one for holding the nail head
A nail head holding bar 128 extends from the front end of the slider 110 to an intermediate position. A rectangular leaf spring mounting recess 11 is provided at a position slightly behind the front end of the slider 110 and at a position slightly behind the middle of the front-rear axis of the slider 110.
0a and 110b are provided. As shown in FIG. 3, leaf springs 110d having six parallel left and right parallel arms 110c are fixed to the bottom walls of these leaf spring mounting recesses 110a and 110b. These arms 110c extend obliquely toward the magazine main body 63 and abut against the side surfaces of the nail head holding bar 128. At the front end of the slider, a front width direction stopper 11 is provided.
0e is formed. This front width direction stopper 110
A widthwise guide 110f having a rectangular cross-section projects toward the magazine body 63 between e and the front leaf spring mounting recess 110a. A rear widthwise stopper 11 that projects forward from the rear end of the slider 110 along the front-rear axis direction of the slider 110 at a position rearward of the rear leaf spring mounting recess 110b.
0 g is provided.

On the other hand, each nail head holding bar 128 has a rear wall surface 6 of the driver guide path 64 in the nose unit 4 at its front end.
It has a front end surface 128a that is flush with 4a. An L-shaped front hook 128b is formed on a side of the slider 110 side slightly behind the front end surface 128a of the nail head holding bar 128 and engaged with and disengaged from the front widthwise stopper 110e. The width direction guide 11 is provided on the rear side of the front hook 128b.
A rectangular recess 128c that is slidably fitted with 0f is formed. At the rear end of the nail head holding bar 128, a rear hook 128d that engages with and disengages from the rear width direction stopper 110g is formed. An arc-shaped portion 128e is formed from the front end of the rear hook 128d to the side surface on the magazine body 63 side.

As shown in FIG. 1, the slider 11
0 is at the forefront position with respect to the magazine main body 63 and when the side opening of the magazine main body 63 is completely closed, each nail head holding bar 128 is pressed against the inner side surface of the side wall of the magazine main body 63 by the leaf spring 110d. Have been. At this time, the front end surface 128a of each nail head holding bar 128 is flush with the rear wall surface 64a of the driver guide path 64. On the other hand, when the side of the magazine body 63 is opened, the slider 11
When 0 moves backward with respect to the magazine body 63, the arc-shaped portion 128 e at the rear end of each nail head holding bar 128 engages with the pusher stopper 118, and as the slider 110 retreats, each nail head holding bar 128 is moved. It is retracted toward the slider 110 by a distance greater than the thickness of the sheet-like connecting nail against the leaf spring 110d. Therefore, when the slider 110 is at the rearmost position with respect to the magazine main body 63, the side surface of the nail head holding bar 128 on the magazine main body 63 side has a thickness greater than the thickness of the sheet-like connecting nail loaded in the magazine main body 63. It retreats from the inner side surface of the side wall of the main body 63. After the sheet-like connecting nail is loaded in the magazine body 63, the slider 1
In the process of pushing the front 10, each nail head holding bar 128 also advances while slidingly contacting the pusher stopper 118,
The slider 110 is shifted toward the slider 110 by a certain distance from the sheet-like connecting nail, and does not hit the sheet-like connecting nail at all. When the slider 110 moves to the forefront position with respect to the magazine body 63, each nail head holding bar 128
Is disengaged from the pusher stopper 118 and the leaf spring 110d
Abuts the sheet-like connecting nail.

A hexagonal rear wall 129 is integrally attached to the rear end of the slider 110. An L-shaped hexagon wrench (not shown) that extends from the rear wall 129 in the longitudinal direction of the slider 110 is housed. On the rear surface of the rear wall 129, an inclined portion 130 for accommodating or removing the short arm portion of the L-shaped wrench while rotating is formed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a nail magazine unit according to an embodiment of the present invention.

FIG. 2 is a partially cutaway longitudinal sectional view of a pneumatic nailer including the nail magazine unit of the present invention.

FIG. 3 is a side view of the inside of a rear portion of a slider of the nail magazine unit of FIG. 1;

FIG. 4 is a sectional view taken along line AA in FIG. 2;

[Explanation of symbols]

 13 Magazine unit 63 Magazine main body 110d Leaf spring 118 Pusher stopper (cam member) 128 Nail holding bar

Claims (1)

(57) [Scope of request for utility model registration] 1. A straight-sheath type nail magazine unit for loading a connecting nail, in which a number of nails are juxtaposed and connected, from the side,
A magazine body with a nail head guide groove in the front-rear axis direction,
A slider attached to the magazine body so as to be movable in the front-rear axis direction of the magazine body, and a nail head holding bar attached to the slider, extending from the front end in the front-rear axis direction of the slider to a halfway, and having a side face facing the nail head guide groove. A leaf spring fixed to the slider and urging the nail head holding bar toward the magazine main body, and a cam member fixed to the magazine main body and capable of engaging and disengaging with the nail head holding bar. Is located at the foremost position with respect to the magazine body, the front end of the cam member is disposed behind the rear end of the nail head holding bar, and the nail is moved with the advance of the slider from the rearmost position with respect to the magazine body. After the head holding bar is moved forward from the connecting nail loaded in the magazine body to the slider side while keeping a gap while being in contact with the cam member, the leaf spring is separated from the cam member. The force is allowed to advance toward the magazine body by force, and as the slider is retracted from the foremost position with respect to the magazine body, the nail head holding bar engages and the magazine body is the sum of the thickness of the connecting nail and the above gap. And a cam member acting to retract from the nail magazine unit.