JP2002239942A - Connected nail feed mechanism in nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connected nail feed mechanism for a nailing machine that can stably form a shape of wire cutoffs 12a and can effectively prevent scatter of the wire cutoffs 12a. SOLUTION: The nail feed mechanism successively feeds connected nails to an ejecting opening 2 by engaging a nail feed claw 10 in reciprocation with nail shanks located in a nail feed passage 7. The nail feed claw has a turnably disposed movable jaw part 19 capable of advance under a connecting wire 12 when wire-connected nails A are loaded, at a place opposed to edges of holding tongues 17a and 17b of a connecting sheet when plastic-sheet-connected nails B are loaded. The movable jaw part 19 is engaged with the connecting sheet 17 and retracted from the nail feed passage independently of the nail feed claw 10 when the plastic-sheet-connected nails B are loaded, and is projected into the nail feed passage and advanced under the connecting wire 12 to support the connecting wire 12 from below when the wire-connected nails A are loaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to two types of nails, a wire connecting nail connected to each other by a metal wire, and a plastic sheet connecting nail which holds and connects a nail shaft to holding pieces formed by bending both sides of a plastic connecting sheet. The present invention relates to a nailing machine which sequentially supplies the connecting nails to the injection port of the nose section and breaks the connection state of the nails supplied to the injection port using the power of compressed air or the like to drive the nails.

[0002]

2. Description of the Related Art As a connecting nail used in a nailing machine driven by compressed air pressure or the like, a wire connecting nail formed by welding a metal wire to a nail shaft and a longitudinal plastic connecting sheet are provided at both longitudinal sides. A plastic sheet connecting nail is known in which a pair of flap-like holding pieces that can be bent are integrally formed, and a nail shaft is inserted through the holding pieces and connected. Both types of connecting nails are properly used depending on the construction site, and a nailing machine that can use both types of connecting nails has already been developed.

FIGS. 4 and 5 (a) and 5 (b) show a nail injection section of a conventionally known nailing machine in which both types of connecting nails can be used. An injection port 32 for slidingly guiding a driver 31 driven by a cylinder / piston mechanism arranged inside the body is formed in a nose portion 30 attached below the nailing machine body. An opening for introducing the foremost nail of the connecting nail into the injection port 32 is formed, and a fixed guide wall 33 for guiding the connecting nail to the injection port 32 is formed integrally with one side edge of the opening. Have been.
A door member 33a is provided facing the fixed guide wall 33 so as to be openable and closable with respect to the nose portion 30, and a gap formed between the fixed guide wall 33 and the door member 33a guides the connecting nail. It is configured as a nail supply path.
On the door member, a pressing plate 35 elastically biased in a direction toward the fixed guide wall 33 is disposed,
The pressing plate 35 maintains the supply path interval for the wire connecting nail A, and presses the plastic sheet connecting nail B against the fixed guide wall 33. The nail supply path is arranged on a line extending from the center line of the injection port 32 in order to arrange each nail of the connecting nail at the center of the injection port 32.

In the case of using the wire connecting nail A, when the leading nail 36a is hit by the driver 31, the connecting wire 37 is connected between the leading nail 36a and the second nail 36b.
Hits the nail feed nail 38, the connecting wire 37 is cut, the connected state is dissociated, and the leading nail is driven out from the injection port 32. At this time, a cutting piece 37a of the connecting wire is formed on the front side of the nail shaft of the second nail 36b, and as shown in FIG. When it becomes 36a, the cut piece 37a is usually formed in the direction of the tip of the nail (downward), so that it is difficult for the cut piece 37a to enter the material to be driven along the nail axis to be driven. In this case, when the nail is driven, the end of the cut piece 37a comes into contact with the surface of the material to be driven, curves, and separates from the nail shaft from the welded portion with the nail shaft and scatters around. Occurs rarely. A concave portion 39 for accommodating a front portion of the wire cutting piece 37a is formed in the injection port 32 of the nose so that the cutting piece 37a attached to the nail shaft to be driven is formed upward so as to prevent scattering of the cutting piece 37a. Have been. Then, in order to easily accommodate the end of the wire cutting piece 37a in the concave portion 39, the connecting wire is supported from below by the nail feeding claw 38 behind the nail shaft to be driven, so that the wire cutting piece 37a is positioned in front of the nail shaft. And is formed in a shape that is easily protruded into the recess 39.

[0005]

Generally, a nailing machine uses several kinds of nails having different dimensions. Depending on the size of these nails, the interval of wire connection differs, or a plastic sheet connection nail is used. In some cases, the width of the sheet may be different. In the above-mentioned conventional art, the supply of the plastic sheet connecting nail is often performed by the nail feeding nail 38 that supports and cuts the connecting wire 37 of the wire connecting nail A,
Since the nail feeding claw 38 cannot be formed in a portion corresponding to the sheet width of the connecting sheet 40 of the plastic sheet connecting nail B, the connecting wire 37 is used when the wire connecting nail A is used.
The nail feed claw 38 cannot be arranged directly below the space, and the gap between the wire 37 and the nail feed claw 38 must be increased as in the case of the nail feed claw 38 in the lower part of FIG.

[0006] When the nail of the wire connecting nail A is driven, the wire 37 is cut without bending so much that the distance between the wire 37 and the nail feeding nail 38 is as small as possible (the upper wire 37 in FIG. 6). reference).

However, when the wire connecting nail A is driven in a state in which the distance is large, the wire cutting pieces 37 as shown in FIG.
a is cut in a shape facing downward from the welded portion of the wire (see the lower wire 37 in the same figure), and the next time the nail is supplied, the wire cut piece 37a cannot be accommodated in the concave portion 39 and scatters. May be done.

The present invention is directed to a nailing machine in which the wire connecting nails A and the plastic sheet connecting nails B can be loaded and used together, and a plurality of types of connecting nails having different wire welding intervals and connecting sheet widths are used. It is an object of the present invention to provide a connecting nail supply mechanism of a nailing machine which can stably form the shape of a wire cutting piece and can effectively prevent scattering of the wire cutting piece.

[0009]

In order to solve the above-mentioned problems, a connecting nail supply mechanism in a nailing machine according to the present invention comprises a wire connecting nail formed by welding a metal wire to a nail shaft and connecting the wire connecting nail to a long plastic. A nose portion attached to the lower end of the nailing machine body, with a nail supply mechanism capable of loading both of the plastic sheet connecting nails connected by inserting and holding a nail shaft through a holding piece formed along the longitudinal direction of the connecting sheet; An ejection port formed in the nose portion, a fixed guide wall formed continuously with the nail introduction opening formed in the ejection port, and a nail rotatably supported by the nose portion and facing the fixed guide wall. An opening / closing door member that forms a supply path; and a nail feed claw that reciprocates along the nail supply path by a drive mechanism provided on the back side of the fixed guide wall. Engage with the nail shaft arranged in the road A nail supply mechanism for sequentially supplying nails in the direction of the injection port, wherein the nail feed nail has a portion where the edge of the holding piece of the connection sheet faces when the plastic sheet connection nail is loaded, When the wire connection nail is loaded, a movable claw that can enter below the connection wire is rotatably provided,
The movable claw portion engages with the connecting sheet when the plastic sheet connecting nail is loaded and is retracted from the nail supply path independently of the nail feed nail, and when the wire connecting nail is loaded, it projects into the nail supply path. It is characterized in that it enters under the connecting wire and supports the connecting wire from below.

[0010]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIGS. 1A and 1B show a nose portion of a nailing machine according to an embodiment of the present invention.

The nose portion 1 is attached to the lower end of the housing of the nailer body and forms a hollow injection port 2 for driving nails. In the injection port 2, a driver 3 integrally mounted on a piston which is driven by compressed air in a cylinder provided in a housing is slidably guided. A nail is connected to one side of the injection port 2.
A fixed guide wall 5 extending rearward continuously with one side of the opening, and a door pivotally supported on the side facing the fixed guide wall 5 so as to be openable and closable. A nail supply path 7 for guiding the connecting nail to the injection port 2 is formed between the member 6. 4 is a pressing plate.

On the rear side of the fixed guide wall 5, a nail feed mechanism 8 comprising a feed piston and a piston / cylinder mechanism accommodating the feed piston is arranged. The feed piston is slidable along the nail supply path 7, and a nail feed claw 10 is attached to the tip of the piston rod 9.
The nail feed claw 10 has advanced to the nail supply path 7 through a window hole formed in the fixed guide wall 5, and is reciprocated along the nail supply path 7. By the reciprocating operation of the nail feed claw 10, the connecting nail in the nail supply path 7 is sequentially supplied into the injection port 2 by engaging with the shaft. The fixed guide wall 5 is provided with a check nail (not shown) that can advance into the nail supply path 7 to prevent the connecting nail from moving backward when the nail feed nail 10 is moved backward. I have.

A recess 13 for accommodating a cut piece 12a of the connecting wire 12 formed in front of the leading nail shaft of the wire connecting nail A is formed in the inner wall of the nose outlet 2. The piece 12a is securely accommodated in the recess 13. A discharge port 14 for discharging the empty connecting sheet of the plastic sheet connecting nail B from the discharge port 2 is formed in the discharge port 2 in front of the discharge port 2.

Regardless of whether the plastic feeding nail B or the wire connecting nail A is loaded in the nail feed nail 10,
A claw portion 16 that engages with the nail shaft 15 of the connecting nail A disposed in the supply path 7 is formed. The claw portion 16 is the first claw supplied into the ejection port 2 when the feed claw 10 is moving forward.
A first claw 16a disposed between the shafts of the first and second nails 15a and 15b, and a second claw 16b disposed behind the shaft of the second nail 15b. , 15b are formed with inclined surfaces so that they can move over the shafts of the respective nails and move rearward when retreating. As shown in FIGS. 2 (a) and 2 (b), each claw portion 16 holds the upper and lower holding pieces of the connecting sheet 17 in order to prevent interference with the edge of the connecting sheet 16 when the plastic sheet connecting nail B is loaded. 17a,
It is not formed in the portion corresponding to 17b. And
A movable claw portion 19 for supporting a wire is formed at a position where the edge of the holding piece 17b on the lower side of the connection sheet 17 faces. The movable claw portion 19 has a feed claw 10 at its rear end.
The wire 20 is rotatably supported by a shaft 20. A wire support claw 21 having the same shape as the shape of the feed claw 10 is formed at the tip portion. Further, the movable claw portion 19 is urged by a spring 22 so as to protrude in the direction of the nail supply path 7. On the other hand, a notch groove 18 is formed to prevent interference with the connecting wire 12 when the wire connecting nail A is used.

In the above configuration, when the wire connecting nail A is loaded in the nailing machine, as shown in FIGS. 1A and 1B, the connecting wire 12 is accommodated in the groove 18 and the first nail 16a is provided. Is the nail 15a and the second nail 1 arranged at the injection port 2.
5b and acts to support the connecting wire 12 in front of the nail shaft of the second nail 15b from below. Similarly, the movable claw portion 19 projects into the nail supply path 7 and the second nail 15
The connection wire 12 is disposed immediately below the connection wire 12 in front of the b-axis to support the connection wire 12 from below. Thereby, when the nail 15a in the injection port 2 shown in FIG. 3 is driven out by the driver 3, the nail 15a arranged in the injection port 2 and the second nail 1
The wire portion between the 5b axis hits the first claw 16a and the movable claw portion 19, and is cut by the first claw 16a and the movable claw portion 19. The upper and lower wires 12 and the first claws 16a,
Since the distance between the movable nail portion 19 and the movable nail portion 19 is very small, the wire cutting piece 1 formed on the front portion of the nail shaft of the second nail 15b is formed.
2a is formed in a shape protruding forward from the nail shaft.

On the other hand, when the plastic sheet connecting nail B is loaded, as shown in FIG.
Is engaged with the edge of the connection sheet 17 and is retracted from the nail supply path 7 against the spring force, so that there is no obstacle to the supply of the plastic sheet connection nail B. As described above, the feed claw 10 is formed so that the plastic sheet connecting nail B can be supplied, and the rotatable movable claw portion 19 is formed at a portion where interference with the connecting sheet 17 is avoided. Connecting wire 12 at the edge
Even if the wire connecting nail A is welded with the connecting wire 12
Can be supported by the movable claw portion 19, and the shape protruding forward from the nail axis, that is, the shape of the wire cutting piece 12a of the wire connecting nail A can be cut into a shape that can be easily accommodated in the concave portion 13. Wire cut piece 12a of nail A
Can be effectively prevented from scattering.

[Brief description of the drawings]

FIG. 1 (a) is a longitudinal sectional side view showing a state in which a wire connecting nail is loaded in a nose portion according to an embodiment of the present invention, and FIG. 1 (b) is a sectional view taken along line XX in FIG. 1 (a).

2 (a) is a longitudinal sectional side view of the same example as in FIG. 1 with a plastic sheet connecting nail loaded in a nose portion, and FIG. 2 (b) is a sectional view taken along line YY in FIG. 2 (a).

FIG. 3 is a cross-sectional view showing a state at the time of driving a nail in an injection port.

FIG. 4 is a longitudinal sectional view showing a nose portion of a conventional nailing machine in a sectional view.

5 (a) and 5 (b) are cross-sectional views of the nailing machine with a wire connecting nail and a plastic sheet connecting nail loaded therein.

FIG. 6 is an enlarged sectional view showing a driving state of a wire connecting nail in a nose portion of a conventional nailing machine.

[Explanation of symbols]

 2 Injection port 7 Nail supply path 10 Nail feeding claw 12 Connection wire 17 Connection sheet 19 Movable claw

Claims (1)

[Claims] 1. A wire connecting nail in which a metal wire is welded and connected to a nail shaft, and a plastic sheet connection in which a nail shaft is inserted and held in a holding piece formed along a longitudinal direction of a long plastic connecting sheet and connected. A nail feeding mechanism that can load both nails,
A nose portion attached to the lower end of the nailing machine body, an injection port formed in the nose portion, a fixed guide wall formed continuously with the nail introduction opening formed in the injection port, and a nose portion. An opening / closing door member rotatably supported to form a nail supply path facing the fixed guide wall, and a nail feed claw reciprocating along the nail supply path by a drive mechanism provided on the back side of the fixed guide wall A nail feeding mechanism configured to engage with a nail shaft arranged in the nail feeding path during forward movement of the nail feeding nail to sequentially supply the connecting nail in the direction of the injection port; On the feed claw, a movable claw that can enter below the connecting wire when the wire connecting nail is loaded is rotatable at a position where the edge of the holding piece of the connecting sheet faces when the plastic sheet connecting nail is loaded. The movable claw portion is provided when a plastic sheet connecting nail is loaded. Engages with the connection sheet and is retracted from the nail supply path independently of the nail feed claw, and when the wire connection nail is loaded, projects into the nail supply path and enters below the connection wire to remove the connection wire. A connecting nail supply mechanism in a nailing machine characterized by being supported from below.