JP3622198B2 - Nail supply mechanism for nail nailing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nail supply mechanism in a nail driver for a connection nail that sequentially supplies a plurality of connection nails connected linearly from a magazine that can be accommodated in parallel toward a nose portion.
[0002]
[Prior art and its problems]
There are two types of power nailers that are driven by compressed air: a type that uses a connection nail in which the connection nail is wound in a coil shape, and a type that uses a connection nail (also called a stick nail) that is connected in a straight line. In particular, many large nails are connected in a straight line because the weight in the connected state increases. In order to facilitate handling of the nail, the series of connection numbers are connected to about 20 to 30. Therefore, there is a limit to the number of nails that can be loaded into the nailing machine at one time with a nailing machine that uses linear connecting nails, and the work of loading nails is often required in successive nailing operations. In some nailing machines, since a large amount of nails is stored in a magazine, a long magazine is installed so that a plurality of connecting nails can be loaded and stored in tandem. However, the rear part of the long magazine protruded long behind the nailing machine, resulting in an injury of the nailing operation.
[0003]
Japanese Patent Publication No. 06-61706 discloses a nailing machine that accommodates a plurality of connecting nails connected in a straight line in a magazine in a parallel state and sequentially supplies these connecting nails to the nose portion of the nailing machine. It is shown. With this mechanism, the length of the magazine can be reduced, and there is no injury to nailing in a narrow place. The nail supply mechanism of the above prior art has one nail engaging member installed in a separator that reciprocates along a nail supply path formed between a magazine and a nose portion for driving out a nail, and this enters into the magazine. Engaging the nail to feed the nail toward the nose. Therefore, the nail transferred forward from the separator is not directly fed out of the engagement member. For this reason, there is a problem that the remaining several of the last connecting nails remain on the nail feed passage.
[0004]
[Problems to be solved by the invention]
The present invention solves the above problems, and supplies a plurality of connecting nails connected in a straight line sequentially from a magazine that can be accommodated in a parallel manner toward the nose portion, and reliably drives up to the last one. It is an object of the present invention to provide a nail supply mechanism that can be used.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a nail supply mechanism in a nail nailing machine for a connecting nail according to the present invention includes a nose portion that continuously connects the connecting nails from a magazine that can accommodate a plurality of linearly connected connecting nails in parallel. In the nail nailing machine for connecting nail, the fixed guide wall constituting one wall of the nail supply path for guiding the connecting nail between the magazine and the nose portion, and a predetermined distance from the fixed guide wall. An openable and closable door member that opposes and forms the other wall of the nail supply path, and a feed piston that reciprocates along the nail supply direction is disposed outside the fixed guide wall. The piston rod of the piston is provided with a first feeding means which can reciprocate to a position close to and away from the nose portion of the nail supply path through the fixed guide wall, and the door member enters the magazine. Position A separator is provided that can slide between a position where the magazine is completely retracted from the magazine, and the separator can be advanced into the nail supply path and can be engaged with the nail shaft in the magazine and the nail supply path. A second feeding means having a claw is carried, the first feeding means and the separator are reciprocated by a predetermined distance along the nail supply direction by the feed piston, and the first feeding means is always moved to the nose portion side. The spring is biased so as to move, and the first feed means is loosely connected to the elongated hole formed in the longitudinal direction of the piston rod so as to operate with a stroke smaller than the stroke of the second feed means, The feeding claw provided in the first feeding means engages with the rear part of the leading nail on the nail supply path and feeds it into the nose part.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a part of a nailing machine in which a nail feeding mechanism according to the present invention is implemented, and a door member constituting one guide wall of a nail supply path 3 formed between a nose portion 1 and a magazine 2. 4 shows an open state. The fixed guide wall 5 constituting the other guide wall of the nail supply path 3 is provided with a first feeding means 6 penetrating from the back side of the wall into the passage.
[0007]
The first feed means 6 is provided in a feed piston / cylinder mechanism 7 (drive means) arranged along the nail supply path 3 and the back side of the magazine 2 shown in FIGS. A feed piston 8a is arranged on the feed piston / cylinder mechanism 7 so as to reciprocate along the nail supply direction. A piston rod 8 is coupled to the feed piston 8a, and the first feed means 6 is carried on the piston rod 8. Has been. The first feeding means 6 is reciprocally movable within a predetermined range between a position close to the nose portion 1 of the nail supply path 3 and a position away from it in conjunction with the piston rod 8. The first feed means 6 is formed with a plurality of feed claws 9 projecting into the nail supply path 3 along the length direction of the nail shaft.
[0008]
The feed piston / cylinder mechanism 7 is retracted when the compressed air is introduced to the front end portion of the feed cylinder 18 near the end of the driving operation for nailing, and is built into the cylinder 18 during the return stroke. It moves forward by the action of the compressed spring (not shown).
[0009]
A separator 10 is slidably provided along the nail supply path 3 on the door member 4 side. The separator 10 is integrally formed with a connecting piece 11 (see FIG. 4) protruding upward, and includes a connecting rod 12 and a door member 4 extending from the piston rod 8 so as to straddle the fixed guide wall 5. It is engaged when closed, and is driven simultaneously with the first feeding means 6 by the operation of the piston rod 8. The separator 10 is set to be slidable between a position where the separator 10 enters the magazine 2 and a position where the separator 10 is completely retracted from the magazine 2 (a central portion of the nail supply path 3).
[0010]
Second separator 14 is carried on separator 10. The second feed means 14 includes a feed claw 13 that can be advanced into the nail supply path 3 and can be engaged with the nail shaft in the magazine 2 and the nail supply path 3.
[0011]
By the way, when the feed piston / cylinder mechanism 7 is operated, the first feed means 6 and the separator 10 reciprocate a predetermined distance along the nail supply direction by the feed piston 8a. Since it is engaged with the piston rod 8, it moves integrally with the operating stroke of the piston rod 8 until it enters the magazine 2. However, as shown in FIG. 2, the first feeding means 6 is rotatably supported by a pin 16 that is loosely fitted in a long hole 15 formed in the piston rod 8, and is inserted into the piston rod 8. The spring 17 is urged so as to always move toward the nose portion 1 side. For this reason, as shown in FIGS. 5A and 5B, the stroke of the first feeding means 6 is limited by the long hole 15 and is smaller than the stroke of the second feeding means 14, that is, the connecting pitch of the connecting nails. Operates in a slightly larger range. Then, the feed claw 9 of the first feed means 6 operates to engage with the rear part of the leading nail on the nail supply path 3 and push it into the nose part.
[0012]
Although not shown, contrary to the above example, an elongated hole (through hole) is formed in the first feeding means along the feeding direction, and a piston rod (pin provided in the elongated hole) is loosely fitted in the elongated hole, In addition, the first feed means may be constantly biased forward, and the first feed means may be operated in conjunction with the reciprocation of the piston rod. Therefore, what is necessary is just to comprise a 1st feed means so that it may be loosely connected with respect to a piston rod.
[0013]
In the magazine 2, a plurality of connecting nails 20 connected in a straight line are accommodated in a parallel state. A check claw 21 of the connecting nail 20 is disposed in the nail supply path 3.
[0014]
Next, the nail supply mode will be described with reference to FIGS.
[0015]
FIG. 6 shows a state in which three connecting nails 20A, 20B, and 20C are loaded in the magazine 2, and the piston rod 8 is disposed at the front end position, and the first feeding means 6 and the separator 10 (second feeding means 14). Both have been moved to the front end position.
[0016]
Here, as shown in FIG. 7, when the nail driving machine is idle driven, the feed piston 8a is driven backward, whereby the separator 10 enters the magazine 2 and separates the series of connecting nails 20A and connecting nails 20B. . At this time, there can be a relationship in which the claw 13 of the second feeding means 14 is engaged with the leading nail 20a of the connecting nail 20A. Since the first feeding means 6 is urged forward in the elongated hole 15 by a spring 17 (see FIG. 2), it engages with the front end portion of the elongated hole 15 at the end of the stroke of the piston rod 8 so as to perform the second feeding. The reverse operation is performed with a stroke smaller than the stroke of the means 14.
[0017]
The piston rod 8 moves forward as shown in FIG. 8 by the end of the idle driving operation, and the separator 10 and the first feeding means 6 are moved to the front end position close to the nose portion 1. The connecting nail 20 </ b> A is moved forward by the second feeding means 14 carried on the separator 10. The connecting nail 20 </ b> A engages with a check claw 21 disposed on the fixed guide wall 5.
[0018]
Further, the separator 10 and the first feeding means 6 are retracted again as shown in FIG. 9 by the second blanking operation. The connecting nail 20A engages with the check claw 21 and stays at the same position, and the feed claw 13 of the second feeding means 14 engages with any nail of the connecting nail 20A.
[0019]
When the second idle shot is completed, the separator 10 and the first feeding means 6 are advanced as shown in FIG. 10, and the connecting nail 20A is further advanced. Up to this point, the leading nail of the connecting nail 20A has not reached the nose portion 1.
[0020]
By the third blanking operation, the separator 10 enters the magazine 2 as shown in FIG. 11, and the second feeding means 14 engages with the nail on the rear side of the connecting nail 20A, and further shown in FIG. Thus, the separator 10 advances by the return of the idle driving operation, and the connecting nail 20A engaged with the feed claw 13 of the second feed means 14 is advanced. The first feeding means 6 abuts on the nose portion 1 and is prevented from advancing, but the second feeding means 14 carried on the separator 10 further advances, and the leading nail 20a is fed by the first feeding means 6. The nail 9 is fed into the nose portion 1.
[0021]
The leading nail 20a supplied into the nose portion 1 is driven by the striking mechanism by the next driving operation. As shown in FIG. 13, the separator 10 and the first feeding means 6 are moved backward in synchronism with the driving of the nail, and the feeding claw 9 of the first feeding means 6 enters the rear side of the nail shaft at the leading position and engages. The feed claw 13 of the second feed means 14 carried on the separator 10 is engaged with the rear nail of the connecting nail 20A.
[0022]
In the next return stroke, the first feeding means 6 and the separator 10 move forward as shown in FIG. 14, the first feeding means 6 pushes the leading nail 20b into the nose portion 1, and the second feeding means 14 is the entire connecting nail 20A. Move forward. Since the feeding is performed by a plurality of feeding claws 9 along the nail axis at a position close to the nose portion 1, the posture of the nail supplied into the nose portion 2 is stable, and the tip of the nail is rearward when hitting The risk of jumping out toward you can be prevented.
[0023]
Thereafter, the operations of FIGS. 13 and 14 are repeatedly performed, and the nail of the first connecting nail 20 </ b> A is sequentially sent out from the nail supply path 3 to the nose portion 1. During this time, since a part of the separator 10 always remains in the magazine 2, the second and subsequent connecting nails 20 </ b> B are not moved toward the fixed guide wall 5.
[0024]
Further, as shown in FIG. 15, the second connecting means 14 engaged with the last nail of the first station is consumed as the first connecting nail 20A is consumed, and the separator 10 is moved to the front position. When moved from the position 2 to the retracted position, the second connecting nail 20B is moved toward the fixed guide wall 5 by a pusher spring (not shown).
[0025]
The next driving operation causes the separator 10 to enter the magazine 2 as shown in FIG. 16 to separate the second connecting nail 20B and the third connecting nail 20C, and the second feeding means 14 connects the second connecting nail. Engage with the top nail of the nail 20B. The first feeding means 6 enters the rear side of the remaining leading nail 20n of the first connecting nail 20A (the connecting nail 20A is moved backward by a check claw 21 provided facing the first feeding means 6. Is blocked).
[0026]
Then, at the return stroke of the piston rod 8, the first feeding means 6 pushes the leading nail 20 n into the nose portion 1 as shown in FIG. 17, and the second feeding means 14 pushes the second connecting nail 20 B from inside the magazine 2. Pull out to the nail supply path 3 and contact the rear side of the final nail 20x of the first connecting nail 20A. At this time, depending on the setting of the stroke of the piston rod 8, the second connecting nail 20B and the first connecting nail 20A cannot be brought into contact with each other at a time, and a gap may be formed. If the contact is made with the number of hits within the remaining number of the connecting nail 20A, the nail can be driven continuously.
[0027]
Next, a state in which the last nail of the last connecting nail 20C is supplied into the nose portion 1 and driven will be described with reference to FIGS.
[0028]
When the remaining number of the last connecting nails 20C decreases, the second feeding means 14 does not come into contact with the connecting nails 20C at all as shown in FIG. Operates between fully retracted forward positions. The feeding claw 9 of the first feeding means 6 enters the rear of the leading nail of the remaining connecting nail 20 that is prevented from moving backward by the check claw 21 in the nail striking stroke, and is the same during the returning stroke of the striking means. The operation of sending this into the nose portion 1 is repeated as shown in FIG. Further, when the first feeding means 6 that has entered the rear side of the last nail 20z locked to the check claw 21 moves forward in the return stroke as shown in FIG. The last nail 20z is supplied into the nose portion 1 as shown in FIG. This is driven out from the nose portion 1 to finish driving all the nails.
[0029]
The operation from when the connecting nail 20 is newly loaded into the magazine 2 to when the first nail is fed into the nose portion 1 is performed by performing the blanking operation of the nailing machine as described above. It is not limited to the example which operates the cylinder mechanism 7. In order to prevent damage due to the blanking operation of the striking mechanism, a manual operation mechanism of the feed piston 8a may be configured. For example, this can be realized by installing a manually operated valve for supplying and discharging compressed air to the front end of the feed cylinder 18.
[0030]
As described above, the second feeding means 14 is provided on the separator 10 that slides in the range where the magazine 2 enters and retreats, and the second feeding means 14 that can be engaged with the nail shaft of the nail in the magazine 2 is provided. Thus, a plurality of connecting nails can be continuously drawn out from the magazine 2 to the nail supply path 3. Further, since the first feeding means 6 capable of reciprocating movement is provided at a position close to the nose portion 1 of the nail supply path 3 and a position away from the nose portion 1, the leading of the nail in the nail supply path 3 by the operation of the first feeding means 6. Can be continuously supplied to the nose portion 1. Further, by operating the first feeding means 6 with a stroke smaller than the stroke of the second feeding means 14, the first feeding means 6 and the second feeding means 14 are separated from each other by a feed piston 8a along the nail supply direction. Since the plurality of connecting nails are continuously pulled out from the magazine 2 to the nail supply path 3, the leading nail of the nail in the nail supply path 3 is continuously supplied to the nose portion 1. be able to. Therefore, the last nail of the last connecting nail can be fed into the nose portion 1 by the feeding claw 9 of the first feeding means 6.
[0031]
Further, since the separator 10 carrying the second feeding means 14 is provided on the door member 4, the number of parts can be reduced and the door member 4 can be easily repaired or the like. it can.
[0032]
Further, since the separator 10 is provided with the second feeding means 14, the second feeding means 14 can be driven simultaneously by driving the separator 10.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a part of a nail driver implementing a nail feeding mechanism according to the present invention. FIG. 2 is a cross-sectional view of a door member of the nail driver closed. Fig. 4 is a longitudinal sectional view of the nailing machine cut by the second feeding means. Fig. 5 (a) and (b) are when the piston rod is advanced. Fig. 6 is a cross-sectional view of the feed piston when it is moving forward. Fig. 7 is a cross-sectional view of the feed piston when it is retracted. FIG. 9 is a cross-sectional view of the feed piston retracted again. FIG. 10 is a cross-sectional view of the feed piston returned and advanced again. FIG. 11 is a cross-sectional view of the feed piston retracted. Cross-sectional view of the state of return and advance [Fig. 13] Fee FIG. 14 is a cross-sectional view of the state where the feed piston is in the process of returning. FIG. 15 is a cross-sectional view of the state where the feed piston is being returned. FIG. Sectional view [FIG. 17] Cross-sectional view of the state in which the feed piston has returned and advanced again. [FIG. 18] (a) to (d) are explanatory views of the nail feeding mode of the last connecting nail in the nail supply path.
DESCRIPTION OF SYMBOLS 1 Nose part 2 Magazine 3 Nail supply path 4 Door member 5 Fixed guide wall 6 1st feed means 8a Feed piston 10 Separator 14 2nd feed means 20, 20A, 20B, 20C Connecting nail

Claims (1)

In a nailing machine for connecting nails, which is configured to continuously supply the connecting nails to the nose portion from a magazine that can accommodate a plurality of connecting nails connected in a straight line in parallel.
A fixed guide wall that constitutes one wall of a nail supply path that guides a connecting nail between the magazine and the nose part, and a second wall of the nail supply path that faces the fixed guide wall at a predetermined interval A door member that can be opened and closed,
A feed piston that reciprocates along the nail supply direction is disposed outside the fixed guide wall, and the piston rod of the feed piston has a position close to the nose portion of the nail supply path through the fixed guide wall. A first feeding means capable of reciprocating movement is provided at a position away from this,
The door member is provided with a separator that is slidable between a position that enters the magazine and a position that completely retracts from the magazine. Carrying a second feed means having a feed claw engageable with a nail shaft in the nail supply path;
Reciprocating the first feeding means and the separator by a predetermined distance along the nail supply direction by the feed piston;
The first feed means is spring-biased so as to always move toward the nose portion side, and the first feed means is loosely connected to a long hole formed in the longitudinal direction of the piston rod to make a stroke of the second feed means. For a connecting nail characterized in that the feed claw provided in the first feeding means engages with the rear part of the leading nail on the nail supply path and feeds it into the nose part. Nail supply mechanism for nailing machine.

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