JP3231936B2 - Nail driving magazine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magazine for supplying nails to a nailer body.

[0002]

2. Description of the Related Art Conventionally, a magazine attached to a nailing machine for finishing, in particular, has a shape of a shallow box having a substantially rectangular shape with a long end, and a tip is connected to a nose portion of the nailing machine body. A plate-shaped connecting nail (hereinafter, simply referred to as a "nail") mainly composed of a magazine body and a sliding door as a lid for closing the magazine body, and having a number of nails connected in parallel in the magazine body.
By operating the nailing machine main body with the slide door closed and nails being driven one by one from the tip of the nose. On the bottom surface of the magazine body, grooves along the feeding direction of the nails are formed at intervals corresponding to various lengths of the nails to be accommodated, while on the inner surface side of the slide door, the axial direction of the accommodated nails is formed. Nail guides in the form of elongated strips for regulating the positional deviation of the nails were arranged at intervals according to the various lengths of the nails, and were spring-biased to push the accommodated nails toward the nose portion. A pusher plate is provided.

In the above-described nailing machine, each of the nail guides is spring-biased toward the inside of the magazine body.
When the slide door is closed, the nail guide located within the length of the nail is returned to the slide door side by a distance corresponding to the thickness of the nail against the bias of the spring, while the nail located above the nail The guide is protruded into the magazine body by the bias of the spring, and thus protrudes toward the upper surface of the nail head. The nail guide protruding toward the upper surface restricts the axial displacement of the nail. This constitutes an automatic nail length adjusting mechanism in the magazine.

[0004]

In such an automatic nail length adjusting mechanism, a conventional nail guide has elastic members at both ends thereof as disclosed in, for example, Japanese Patent Application Laid-Open No. 62-218077. Thus, the spring is biased uniformly in the longitudinal direction. Here, as described above, the nail guide located within the length of the nail is returned to the slide door side against the urging of the spring. In other words, the nail guide is moved by the urging of the nail. , Which resists the movement of the nail by the pusher plate. When the number of stored nails is large, the pushing force of the pusher plate is large enough so that the resistance due to the nail guide is hardly a problem.However, when nailing progresses and the number of nails in the magazine decreases, the pusher plate becomes smaller. The pushing force of the pusher plate gradually decreases, and the resistance of the nail guide cannot be ignored. That is, in a state where the nails in the conventional magazine are reduced, the nail guide resistance may exceed the pushing force of the pusher plate, and the nail feeding may not be performed smoothly.

The present invention has been made to solve this problem, and it is an object of the present invention to provide a magazine for a nailing machine in which a nail can be smoothly fed to the last one regardless of the amount (remaining amount) of nails. Aim.

[0006]

According to a first aspect of the present invention, there is provided a magazine provided with a nail guide on an inner surface side of a slide door for holding a nail housed in a magazine body. The magazine is supported so as to be tiltable inward of the magazine with the rear end of the nail feeding direction as a fulcrum, and that only the front end is urged inward of the magazine by an elastic member. .

[0007]

According to the first aspect of the present invention, the nail guide is pressed against the nail by receiving the urging force in the forward tilting direction with the rear end as a fulcrum, and a reaction force is generated against the pressing force. The reaction force acts on the nail as movement resistance. Since the reaction force acts on the center of the nail, this point of action moves away from the fulcrum of the nail guide as the remaining amount decreases, and therefore,
The smaller the remaining amount of nails, the lower the above reaction force, that is, the movement resistance. As described above, when the remaining amount of nails decreases, the nail feeding force by the pusher plate decreases, but the movement resistance of the nail also decreases as described above. It is done smoothly.

[0008]

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the entire nailing machine provided with the magazine 1 of the present embodiment. The nailing machine main body 2 does not need to be changed in particular, and therefore will not be described in detail. ) And a contact lever 4 whose trigger 5 is not effective unless it is retracted upward in the figure. Reference numeral 7 denotes a handle portion provided orthogonally to the main body 2 in a T-shape, and compressed air is supplied to the main body 2 via an air hose (not shown) connected to a rear end (right end in the drawing) of the handle portion 7. Is supplied.

As shown in the figure, the magazine 1 has a front end (left end in the figure) fixed to the right side of the nose portion 6 and a rear end (right end in the drawing) fixed to the rear end of the handle portion 7. And are arranged substantially in parallel. As shown in FIGS. 2 to 4, the magazine 1 is roughly divided into a magazine body 10 having a substantially box shape with a long and shallow bottom, and a slide door 20 as a lid for closing the magazine body. The front end is fixed to the nose portion 6 and the rear end is fixed to the handle portion 7 so that the magazine 1 can be used as described above.
Mounted on On the other hand, the sliding door 20
Are, as shown in FIG. 4, both end edges 20b, 20b in the width direction.
Are slidably fitted and supported at both ends in the width direction of the magazine main body 10, whereby the magazine main body 10 is slid in the longitudinal direction thereof and is supported so that the magazine main body 10 can be opened and closed. A space is formed between the magazine body 10 and the slide door 20 for accommodating a thin plate-shaped connecting nail (hereinafter, simply referred to as a "nail") in which a number of nails N to N are connected in parallel. Is done.

As shown in FIG. 4, on the bottom surface 10a of the magazine body 10, a plurality of grooves 11 to 11 along the feeding direction of the nail N (the direction toward the nose portion 6) are accommodated.
Are formed in parallel with each other at intervals corresponding to various lengths of. The groove 11 functions as a groove for releasing the head of the nail N stored therein, whereby the shaft of the nail N is stored without floating from the bottom surface 10a of the magazine body 10.
However, the groove 11a formed substantially at the center is also used as a groove for guiding the pusher plate 12. The pusher plate 12 has a plate shape slightly thinner than the nail N, and is arranged on the bottom surface 10a of the magazine body 10 in an overlapping manner. At the rear end of the pusher plate 12, a supporting edge 12a bent toward the bottom surface 10a is provided.
Is inserted into a spring accommodating hole 10b formed in the back of the magazine body 10 through the groove 11a. The spring housing hole 10b is formed over the entire length of the magazine body 10 in the longitudinal direction as shown in FIGS.

On the other hand, a support wall 21 is formed to project from the rear end of the slide door 20, and a long shaft 22 is supported on the support wall 21 so as to protrude in the nail feeding direction (leftward in the figure). A support edge 12a of the pusher plate 12 is connected to the shaft 22 such that the support edge 12a is movable along the shaft 22 and cannot be removed by a head 22a formed at the tip. A compression coil spring 13 is mounted between the support edge 12a and the support wall 21 and around the shaft 22. The compression coil spring 13 urges the pusher plate 12 in the nail feeding direction. . A long cylindrical cover 13a is attached around the compression coil spring 13 for the purpose of preventing meandering in order to ensure smooth expansion and contraction. It is fixed to the support wall 21. The compression coil spring 13 and the shaft 22 including the cover 13 are integrated to form the spring accommodation hole 1.
0b, the sliding door 20 shown in FIG.
In the closed state, these are inserted to the innermost part of the spring accommodating hole 10b, while the sliding door 20 shown in FIG.
In the open state, the tip is pulled out with the tip left.

On the other hand, the pusher plate 12
When the slide door 20 is opened, it moves integrally with the shaft 22 to the rear of the magazine body 10. When the slide door 20 is closed, the nails N to N are located ahead of the pusher plate 12 (the nose portion). 6), the pusher plate 12 cannot move forward at the position where the pusher plate 12 is in contact with the tail of the nail N (the last nail N to be driven). Further, by closing the slide door 20, the compression coil spring 13 is moved. The pusher plate 12 is retracted by the urging force generated by this and the last nail N
Pressed to. From this, the pressing force of the pusher plate 12 against the last nail N in the state where the slide door 20 is completely closed becomes the nail feeding force for pushing the nails N to N toward the nose portion 6. The feed force changes depending on the number of nails N to N. That is, the nail feeding force increases as the number of nails N stored therein increases, and gradually decreases as the driving operation proceeds and the number of nails N in the magazine 1 decreases.

Next, a plurality (seven in this example) of nail guides 23 to 23 are attached to the inner surface of the slide door 20. Each nail guide 23 has a long and narrow plate shape as in the prior art, and is attached along the nail feeding direction.
On the bottom surface 20a of the slide door 20, ribs 27 to 27 in the width direction (direction orthogonal to the nail feeding direction) are formed at two places in the center and a total of four places near the front end and the rear end. 27 are formed with grooves 27a to 27a slightly wider than the thickness of the nail guide 23 along the nail feeding direction. Grooves 27a-27 on the same line in each rib 27
The nail guides 23 are inserted into the nail guides 27a, whereby the nail guides 23 are arranged in parallel with each other at intervals corresponding to various lengths of the nails N to be accommodated.

As shown in FIG. 1 to FIG. 3 and FIG. 5, a pin 24 spans and is supported along the width direction at the rear portion of the slide door 20 (the portion where the rib 27 near the rear portion is formed). The pin 24 is inserted through a long slot 23 a formed in the nail feed direction and formed at the rear end of each nail guide 23. Therefore, each nail guide 23 is supported so as to be tiltable (in the vertical direction in FIGS. 2 and 3) toward the inside of the magazine 1 with the pin 24 as a fulcrum. As best shown in FIGS. 1 and 5, each nail guide 23
Behind the wall portion 25 is a bottom surface 20a of the sliding door 20.
Are integrally formed. A portion of the wall portion 25 corresponding to the rear of the first and fourth nail guides 23, 23 from above (from the bottom in FIG. 1) in FIG. Compression coil springs 26 are respectively mounted between the bottom surfaces of the concave portions 25a and the rear ends of the first and fourth nail guides 23, 23. For this reason, the first and fourth nail guides 23 are urged forward in the nail feeding direction by the compression coil spring 26, and when the slide door 20 is opened as shown in the drawing, the first and fourth nail guides 23 are located forward of the other nail guides 23. While being in a protruding state, it can be retracted within a range permitted by the long slot 23a against the compression coil spring 26, and the other nail guide 2 can be retracted at the retracted position.
3 and the tip are aligned. The nail guides 23 other than the first and fourth nail guides 23 are immovable in the longitudinal direction with their rear ends in contact with the wall 25.

Next, as shown in FIGS. 2 and 3, the distal end of each nail guide 23 has a groove formed in the longitudinal direction thereof to form a lower piece 23b and an upper piece 23c in the drawing. And is formed in a forked shape. On the other hand, holes 27b slightly longer in the vertical direction in the drawing are formed in the ribs 27 near the distal end in pairs with the respective groove portions 27a, and the upper piece 23c of the forked portion is inserted into each of the holes 27b. . For this reason, each nail guide 23 can be tilted with the pin 24 as a fulcrum within a range in which the upper piece 23c can move vertically in the hole 27b. On the other hand, each lower piece 23b is inserted into the groove 27a, and the lower piece 23b is formed longer than the upper piece 23c and protrudes forward as shown in the drawing. the pusher plate 12 a pusher plate 12 in the state not pressed the nail N
The pusher plate 12 is formed so as to protrude further forward, and has a sloped surface 23d which is inclined downward toward the tip of the pusher plate 12 at its tip. This lower piece 23
Since the illustrated lower edge of b is in contact with the accommodated nail N, the nail N is guided by the inclined surface 23d of the lower piece 23b and pressed against the bottom surface 10a of the magazine body 10 when the slide door 20 is closed. Can be Therefore, when the sliding door 20 is closed in a state where the rear portion of the nail N accommodated is warped and floated from the bottom surface 10a as shown in FIG. 23b inclined surface 2
The slide door 20 is guided by 3d and pressed against the bottom surface 10a, whereby the warp is corrected, so that the slide door 20 can be closed smoothly without any trouble. Further, as shown in FIG. 2, a partition wall 27c between the groove 27a and the hole 27b, which is inserted between the upper and lower pieces 23b and 23c of each nail guide 23,
Only the first and fourth nail guides 23 are cut off in the nail feed direction because the rear portions of the first and fourth nail guides 23 are cut off as described above.
Can be moved in the nail feed direction, but the other nail guides 23 do not have the partition wall 27c 'as shown by the dotted line in the drawing, and the rear end is the wall 2 as described above.
5 cannot be moved in the nail feed direction.

Next, a leaf spring 28 as an elastic member is interposed between the tip of each nail guide 23 and the bottom surface of the slide door 20. For this reason, the tip of each nail guide 23 is urged downward in the figure, that is, toward the nails N to N housed in the magazine body 10.
Therefore, as shown in FIG. 4, the nail N of a certain length accommodated as shown in FIG. 4 is located on the lower side in the figure located within the range of the length of the nail N among the seven nail guides 23 to 23. The two nail guides 23 'are pushed back toward the bottom surface 20a by a distance corresponding to the thickness of the nail N against the leaf spring 28, while the five nail guides 23 located outside the range of the length of the nail N Since the '' is not pushed back, it is in a state of protruding above the head of the nail N, and in particular, the third nail guide 28 from the bottom is protruding substantially along the upper surface of the head of the nail N, Thereby, the axial displacement of the nail N is regulated. Also, the two nail guides 2 pushed back
3 'is pressed against the nail N by the leaf spring 28, so that the nail 3' is lifted or warped from the bottom surface 10a of the nail N.

As shown in FIGS. 1 and 5, a lock lever 30 for locking the closed state of the magazine body 10 is provided at a rear portion of the slide door 20 at a fulcrum 30a.
When the lock lever 30 is pressed down against the compression coil spring 31, the lock on the magazine body 10 is released and the slide door 20 can be opened. The lever 30 is returned to the lock position by the compression coil spring 31, and the lock claw formed at the tip thereof is locked to the magazine body 10 side, whereby the closed state of the slide door 20 with respect to the magazine body 10 is locked. ing.

Reference numeral 29 in the figure denotes a check bar which constitutes an anti-hitting device of the nailing machine. The check bar is movable in the axial direction and its tip is substantially orthogonal to the spring receiving hole 10b. Is inserted. When the number of nails N in the magazine 1 becomes less than a certain value, the support edge 12a of the pusher plate 12 is engaged with the check bar 29,
As a result, the check bar 29 cannot be moved in the pulling-out direction (upward in FIG. 1), so that the pull-in operation of the trigger 5 is prevented, and thus the nail N is prevented from being hit.

Further, as shown in FIG.
A part of 0 is formed of a transparent material, and the inside can be seen through, so that the remaining amount of the accommodated nails N to N can be visually checked. "20", "3" displayed in this transparent part
Numerical values of “0” and “40” indicate the length of the accommodated nails N, and numerical values of “50” and “100” indicate the number of accommodated nails N.

The magazine 1 of the present embodiment configured as described above
According to this, the following operation and effect can be obtained. In the conventional nail guide, both ends are urged toward the accommodated nails. However, each of the nail guides 23 to 23 in the magazine 1 of this example has only a leaf end at the front end near the nose portion 6. The spring 28 is urged in the pressing direction toward the nail N, and the rear end is supported by the pin 24 so as to be tiltable without being urged as in the related art. According to this configuration, as shown in FIG. 6, each nail guide 23 is pressed against the nail N by receiving an urging force in the direction of tilting forward with the pin 24 as a fulcrum,
The nail N is pressed against the bottom surface 10a of the magazine body 10 by a reaction force P to the pressing force F. This reaction force P acts as the movement resistance P of the nail N and can be considered to act on the center of the nail N. From this, the movement resistance P of the nail N is smaller when the remaining amount of the nail N is large (minute diagram (a)).
(b)) is smaller. That is, as is apparent from the drawing, F × L = P1 × D1 = P2 × D2, and since D1 <D2, P1> P2, and therefore, the movement resistance P of the nail N decreases as the number of nails decreases. Become. In this regard, when both ends are urged as in the related art, the movement resistance does not change in accordance with the remaining amount of the nail, and even when the remaining amount is reduced, it is the same as when the remaining amount is large. Movement resistance acts. As described above, according to the configuration of the present example, the nail feeding force of the pusher plate 12 decreases when the remaining amount of the nail N decreases, but as the movement resistance P decreases as described above, the nail feeding can be performed smoothly. This is done, and the problem that nail feeding is no longer performed unlike the conventional case does not occur.

Further, as the remaining amount of the nail N decreases, the movement resistance P decreases, so that the nail feeding force of the pusher plate 12, that is, the urging force of the compression coil spring 13 is smaller than that of the conventional one. Therefore, the setting of the compression coil spring 13 is facilitated.

In this embodiment, the leaf spring 28 is exemplified as an elastic member. However, the present invention is not limited to this. For example, a compression coil spring or an elastic rubber may be used for each nail guide 23.
It is also possible to adopt a configuration for urging the front part of.

[0023]

According to the first aspect of the present invention, even if the nail feeding force of the pusher plate is reduced due to a decrease in the remaining amount of nails, the movement resistance of the nails is reduced accordingly. Is made smoothly and the last one is reliably supplied to the nail driving passage.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a side view of an entire nailing machine.

FIG. 2 is a sectional view taken along line AA of FIG. 1 and is a longitudinal sectional view of the magazine in a state where a slide door is closed.

FIG. 3 is a longitudinal sectional view of the magazine in a state where the slide door is opened.

[Figure 4] is a sectional view taken along line B-B of FIG. 1 is a transverse sectional view of the magazine.

5 is a view as viewed in the direction of arrow C in FIG. 3, and is an inner view of the slide door.

FIG. 6 is a view for explaining that the movement resistance of the nail decreases as the remaining amount of nails decreases. FIG. 6 (a) shows a case where the remaining amount of nails is large, and FIG. Indicates when the remaining amount of nails is low.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magazine 2 ... Nailing machine main body 6 ... Nose part 10 ... Magazine main body 11 ... Groove part 12 ... Pusher plate 13 ... Compression coil spring 20 ... Slide door 23 ... Nail guide 24 ... Pin 28 ... Leaf spring N ... Connecting nail

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B25C 1/00

Claims (1)

(57) [Claims] 1. A magazine provided with a nail guide on an inner surface side of a slide door for holding a nail housed in a magazine body, wherein the nail guide is provided at a rear end of the nail feeding direction as a fulcrum. A magazine for a nailing machine characterized in that the magazine is supported so as to be tiltable toward the front end and only the front end is biased inward of the magazine by an elastic member.