JP2000246664A - Connected nail guide mechanism in magazine for nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drive even stick nail type connected nails to the last nail. SOLUTION: A nail feed passage 6 for guiding and feeding connected nails 4 connected in the mutually overlapped state of the heads is connected to a rear wall of a cylindrical nose part 1 connected to an impact mechanism. A feed claw 10 reciprocated along a nail feed direction is disposed detachably from the nail shanks of the connected nails 4, at an aperture 9 formed at one side wall of the nail feed passage 6, and a pressing piece 16 movably disposed and engaged with the rear face of the head of the last connected nail to push it out to the nose part 1 side is provided near the nose part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a magazine loaded with a so-called stick nail in which a plurality of nail heads are connected in a state of being overlapped with each other, and the above-mentioned connecting nail is provided in a nailing machine up to the last one. The present invention relates to a guide mechanism capable of supplying and driving a nail into a given nose portion.

[0002]

2. Description of the Related Art A pusher is generally used as a feed mechanism for a magazine for a connecting nail of this type. In this method, a pusher is arranged in a nail feed passage of a magazine, and a connecting output nail is pressed by a constant output spring from behind the connecting nail loaded in the nail feed passage to supply the connecting nail to a cylindrical nose portion of the nailing machine. It is. The stick nail is tilted forward and the head is tilted backward to prevent the nail tip from leaning back and jumping out of the opening connecting the nose and magazine at the moment of driving with a screwdriver. As supplied.

By the way, in order to supply the last one nail to the nose portion with the stick nail, the pusher needs to have a pusher as shown in FIG.
Must be moved to the position shown in. However, in this case, the tip 30a of the pusher 30 enters the nose portion 31. Therefore, when the driver 32 is driven in this state, the driver 32 hits and breaks the tip 30a of the pusher 30 that has entered the nose portion 31. I will. For this reason, the pusher 30 has to stop moving before the nose portion 31, and it is necessary to load a new connecting nail while leaving some of the push nails in the nail feed passage 33. Such a phenomenon similarly occurs even when the feeding is performed by a feeding claw having a conventional structure instead of the pusher.

It is an object of the present invention to provide a multiple-load magazine mechanism which can solve the above-mentioned disadvantages and can drive the last nail even with a stick nail type connecting nail.

[0005]

In order to solve the above problems, a guide mechanism for a connecting nail in a magazine for a nailing machine according to the present invention comprises a head mounted on a rear wall of a cylindrical nose portion connected to a hitting mechanism. A nail feed path for guiding and supplying a connecting nail connected in a state where the parts are superimposed on each other, and an opening window formed on one side wall of the nail feed path, a nail feeding nail reciprocating in a nail feeding direction. Is disposed so as to be disengageable from the nail shaft of the connecting nail, and is movably disposed near the nose so as to engage with the rear surface of the last head of the connecting nail and push the nose toward the nose. Characterized in that a pressed piece is provided.

[0006] The pressing piece is rotatably arranged near the nose portion and normally engages with the side surface of the head of the connecting nail, and when the last nail of the connecting nail passes, this last pressing piece is moved. Preferably, a spring is biased to push the rear surface of the nail head toward the nose.

Further, it is preferable that the movement of the pressing piece is restricted so as not to enter the nose portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes a nose portion formed on a nailing machine main body. This nose portion 1 is connected to a hitting mechanism, and includes a driver 2 driven by a hitting mechanism. It is slidably housed, and is formed in a cylindrical shape so as to receive the leading nail of the connecting nail (stick nail) 4 supplied from the magazine 3. In addition, as before,
The connection nail 4 is formed such that the nail shaft is fed in a state where the nail axis is inclined backward from the axis of the nose portion 1.

In the magazine 3, three connecting nails 4 are accommodated, and are supplied to a nail feed passage 6 for supplying the connecting nails 4 to the nose portion 1 in order from only one connecting nail 4 by a spring 5. It is configured. A guide groove 7 that engages with the head of the connecting nail 4 and guides the nail head is formed in the upper part of the feed passage 6. Also, one guide wall 6a of the nail feed passage 6
Is formed with an opening window 9, and a feeding claw 10 reciprocating in the nail supply direction faces the opening window 9. The feeding claw 10 is an air cylinder device 11 arranged outside the nail feeding passage 6.
Rotatably attached to the tip of the rod 12 provided in the
It is always biased by a spring so as to enter the nail feed passage 6 and to be engaged with the nail shaft of the connecting nail 4. The feed claw 10 engages with the nail shaft of the third nail from the tip of the connecting nail 4 in the nail feed passage 6 when moving forward, and feeds the connecting nail 4 by one nail, and when moving backward, it feeds from the nail shaft. It is formed to perform a retreat operation.
The upper and lower two claws 13 are formed on the feed claw 10, and when the feed claw 10 is at the forward moving end,
As shown in FIG. 2, the front upper end is engaged with the shaft of the second nail of the connecting nail 4, and the front lower end is restricted to a position immediately before entering the nose part 1. .

A check claw 15 is mounted on the other guide wall 6b of the nail feed passage 6 so as to be able to protrude and retract within the nail feed passage 6, and is biased by a spring so as to always enter. The tip of the check nail 15 is inclined, and when the connecting nail 4 is fed forward, the inclined surface engages with the nail shaft and retreats from the nail feed passage 6, and when the connecting nail 4 moves backward backward. It is formed so as to engage with the nail shaft and prevent movement.

Next, a pressing piece 16 is disposed near the nose portion 1 so as to be rotatable about a support shaft 17. The pressing piece 16 faces the guide groove 7 for guiding the nail head on the same side as the feed nail 10, enters the nail feed path 6, and is spring-biased so as to engage with the head of the connecting nail 4. I have. The pressing piece 16 has an engaging surface 18 that engages with the side surface of the connecting nail 4 in the nail feed passage 6, a pressing surface 19 that engages behind the last nail in the connecting nail 4, Side slope 20 is formed. The engaging surface 18 may be formed so as to press the heads of the second and third nails behind the nose portion 1.
Is formed so as to form an obtuse angle with the front pressing surface 19 and the rear slope 20 respectively.

A part of the nose portion 1 is cut out, and the pressing piece 1
6 can enter the wall of the nose 1 through the cutout 21, but the engaging surface 18 engages with the edge 22 of the opening of the nose 1, and the pressing piece 16 It is regulated so that it cannot enter.

When the connecting nail 4 is loaded in the nail feed passage 6 of the magazine 3 having the above-described configuration, the connecting nail 4 is stored in a state in which the axis of the nail shaft is inclined backward from the axis of the nose portion 1. When the air cylinder device 11 is operated in the nail driving operation, the feed claw 10 reciprocates, and the feed claw 10 engages with the nail shaft of the connecting nail 4 at the time of forward movement to feed and operate the connecting nail 4 to nose the leading nail. After being supplied to the section 1, it returns to the original position. Thereafter, by operating a drive mechanism (not shown), the driver 2 is driven out along the nose portion 1, hits the leading nail in the nose portion 1, and drives the nailed material from the tip of the nose portion 1. After the leading nail is driven, the air cylinder device 11 operates again, and the feed pawl 10 supplies the next leading nail to the nose portion 1.

When the nail is being fed, as shown in FIG.
And cannot enter the inside of the nail feed passage 6.

In this manner, when the nails in the nose portion 1 are driven one after another and only the last two nails remain, the pressing piece 1
6 engages with the rear part of the head 24 of the penultimate nail as shown in FIG. 3 (a), and when the nail in the nose part 1 is driven in, the pressing surface 19 as shown in FIG. 3 (b). The rear surface of the head 24 of the last nail is pushed out and sent to the nose portion 1, and the pressing is maintained as it is so that the head 24 does not move backward to the feed side. Therefore, the upper part and the lower part of the nail are held in the correct posture by the pressing piece 16 and the feed nail 10, respectively. At this time, the engaging surface 18 of the pressing piece 16 is engaged with the edge 22 of the opening of the nose 1, and the pressing piece 16 cannot enter the nose 1.

[0016] When the driver 2 hits the last nail, the nail is held in the correct position, so that the nail is reliably hit. Although the pressing piece 16 is engaged with the nail head 24, it does not enter the nose portion 1 as shown in FIGS. 2 and 3B, so that the pressing piece 16 is not hit by the driver 2. Also,
A state where the nail axis of the nail is tilted backward from the axis of the nose part 1;
That is, since the tip of the nail is surely inserted into the nose portion 1, there is no inconvenience that the tip of the nail jumps out toward the magazine 3 at the time of driving.

Thereafter, as shown by the chain line in FIG. 3B, when the front end of the new connecting nail 4 is engaged with the inclined surface 20 on the rear side of the pressing piece 16, the pressing force of the connecting nail 4 causes the pressing piece 16 to move. Since the inclined surface 20 is pushed forward and the inclined surface 20 is pushed outward, the connecting nail 4 is pushed outward and retreats from the nail feed passage 6.
For this reason, a new connecting nail 4 moves in the nail feed and is supplied to the nose portion 1. The pressing piece 16 has an engaging surface 18 as shown in FIG.
Abuts against the side surface of the head 24 of the connecting nail 4.

As described above, the connecting nail 4 is sent to the nose portion 1 with its nail axis inclined backward from the axis of the nose portion 1. Since the driver 2 is located immediately before entering the nose portion 1, it is possible to effectively prevent the driver 2 from hitting the pusher and breaking it when the driver is driven.

The last nail of the connecting nail 4 is pushed by the pressing piece 16 instead of the feed claw 10 into the nose portion 1 by engaging with the rear face of the head 24 of the nail. The pressing piece 16 is not hit by the driver 2 because the engaging piece 22 engages with the edge 22 of the opening of the portion 1 and cannot enter the nose portion 1.

In the above example, the pressing piece 16 is
In the example shown, the pressing piece 1
6 is not necessarily limited to a rotating example. It may be configured to reciprocate linearly.

Further, the above example is particularly effective in a magazine of a multiple mounting type employing a feed nail, but the nail feed is not limited to the feed nail. It may be a pusher.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a guide mechanism for a connecting nail in a magazine for a nailing machine according to the present invention.

FIG. 2 is a side view of a main part of the connecting nail guide mechanism.

FIGS. 3 (a) and 3 (b) are explanatory views of an operation mode of the guide mechanism.

FIG. 4 is an explanatory view of a case where the last one nail is supplied to a nose part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nose part 4 Connecting nail 6 Nail feeding passage 9 Opening window 10 Feeding nail 16 Pressing piece

Claims (3)

[Claims] 1. A nail feeding passage for guiding and feeding a connecting nail having a head overlapped with each other and connected to a rear wall of a cylindrical nose portion connected to a striking mechanism. A nail feed claw reciprocating in the nail supply direction is disposed in an opening window formed in one side wall of the connection nail so as to be detachable from a nail shaft of the connection nail, and near the nose portion, the nail of the connection nail is provided. A guide mechanism for connecting nails in a nail driving machine magazine, comprising a pressing piece movably disposed so as to be engaged with the rear surface of the last head and pushed out toward the nose side. 2. The pressing piece is rotatably disposed near the nose portion, and normally engages with a side surface of a head of a connecting nail.
2. The guide mechanism for connecting nails in a nail driving machine magazine according to claim 1, wherein when the last nail of the connecting nail passes, the rear surface of the head of the last nail is spring-biased so as to push the rear surface toward the nose. 3. The guide mechanism for a connecting nail in a nail driving machine magazine according to claim 1, wherein the movement of the pressing piece is restricted so as not to enter the nose portion.