JPH0727090Y2 - Nail holding device for nailer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail holding device for a nailing machine, and more specifically, a nailing machine for holding a nail loaded in a nose at the tip of the nailing machine so that it can be ejected in the axial direction of the nose. The present invention relates to a nail holding device of a machine.

[0002]

2. Description of the Related Art Generally, a nail driving machine for driving a nail at a leading position of a plurality of T-shaped nails having a circular expanding head into a nail driving material. In
Since the inner diameter of the nose for driving the nail is set to be slightly larger than the head diameter of the nail, the tip of the nail is easily moved. Therefore, when the driver hits the head of the nail to separate the nail from the connecting material during the nail striking stroke, and after that, the hit nail loses its posture in the nose, and the nail is disengaged from the axis of the nose. It may tilt and fall into the nail-driving material while maintaining its posture. In particular, gypsum board nails having a head with a diameter larger than that of ordinary nails do not allow ordinary nails to break so that the head edges of the nails that are tilted and driven do not break the cover paper that covers the surface of the gypsum board. The above accidents are more likely to occur even though the requirements for vertical driving are stricter.

Therefore, the applicant of the present invention first guides the tip of the nail driven from the nose of the nailing machine along the extension of the axis of the nose so that the posture of the nail is perpendicular to the surface of the material to be driven. We have proposed several nail-holding devices to hold the nails.
One example is the nail guide device in the nail driver of Japanese Utility Model Publication No. 63-50679. In this nail guide device, the tip portion of the nose is expanded in diameter, a tubular body is fixed to the tip portion, and a plurality of nail holding members are provided between the tip portion of the nose and the tubular body via an elastic body. It is provided to hold the tip of the nail on the extension of the axis of the nose until the nail is driven into the nail driving material by the tip of the nail holding member.

Another example is the nail holding device of the nailing machine of Japanese Utility Model Laid-Open No. Sho 64-1871. In this nail holding device, a plurality of nail guide elements are provided on the outer peripheral portion of the tip portion of the nose, and each tip portion of these nail guide elements is made to project beyond the tip portion of the nose to enter the extension direction of the driving passage of the nose. And the guide element is rotatably pivoted to a position retracted from the extension direction of the driving passage, and these guide elements are biased in the closing direction by elastic means so that the nail in the driving passage can be held inside thereof. On the other hand, when the engaging portion of the safety device having the cylindrical engaging portion surrounding the nose engages the surface of the nail driving material and moves along the axial direction of the nose, the nail guide is provided. The element is configured to be housed therein to receive the nail guide element that has been opened and acted upon driving the nail.

The nail holding devices of the above two examples are superior to the conventional nail holding devices in that the degree of impairing the ease of aiming the nail driving position is small. However, since the nail holding devices of these two examples are still provided on the outer periphery of the tip portion of the nose, the aim of the nail driving position in the nail driving material is higher than that of the nail driving machine without the nail holding device. There is a problem that impairs ease.
Further, since the nail holding devices of the above two examples are arranged at the tip of the nose, they have a problem that they resist the kinetic energy of the nail near the time when the speed of the driver becomes maximum.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a nailing device for a nailing machine which has the same durability as a nailing machine which has no nail holding device on its nose and which is as easy to aim at a nailing position as possible. Is to provide.

[0007]

DISCLOSURE OF THE INVENTION The nail holding device of a nailing machine of the present invention is provided at least at a part of the nose retracted from the tip end surface by a distance corresponding to the nail length of a T-shaped nail. A nose having a pair of holes, at least a pair of pawls pivotally supported by the nose above the position of the holes, the tip of which goes in and out of the nose through the holes; and the tip of the pawl. A spring for biasing the pawl to be inserted into the nose and a means for stopping pivotal movement of the pawl so as to keep the tip of the pawl in the nose. By holding the head of the nail hit by the rod-shaped driver for a short time, the tip of the driver is brought into close contact with the upper surface of the head of the nail so that the axis of the nail is aligned with the axis of the nose.

[0008]

Since the nail holding device of the present invention is provided at one part of the nose retracted from the tip end surface of the nose to the body, the nail driving position is easy to aim at. It is equivalent to a hammer. Further, since the nail holding device aligns the nail with the shaft of the nose at a position where the speed of the driver does not increase so much, the nail holding device can be made compact and lightweight. In addition, the nail holding device has improved durability because the inertial force of the driver integrated with the piston and the nail is lower than in the conventional case.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. A nailing machine equipped with a nail holding device 1 includes a grip that is connected to a compressed air supply source, a body that is connected to the grip at a front portion of the grip at a substantially right angle, and a nail striking mechanism that is provided in the body. A trigger valve for an operator to manually control the nail striking mechanism, a nose 2 extending axially downward of the body, and a nail supply mechanism for supplying a nail 15 into the nose 2. The nail striking mechanism
The nose 2 is provided with a rod-shaped driver 3 that reciprocates.

As shown in FIG. 1, a nail holding device 1 is provided at one portion of the nose 2 which is considerably retracted from the front end surface 2a of the nose 2 toward the body. Nail holding device 1
Is provided with a pair of vertical guide claws 4 and 5 arranged on the outer peripheral surface of the cylinder of the nose 2. These vertical guide claws 4
Since and 5 have the same structure and function,
The vertical guide claw 4 will be described.

At the outer end of the vertical guide claw 4, the vertical guide claw 4 is inserted between a pair of brackets 6a and 6b which project from the outer peripheral surface of the nose 2 in the horizontal axis direction and project outward in the horizontal axis direction of the nose 2. It is swingably supported by a bolt 7. Between the pair of brackets 6a and 6b, a hole 12 extends axially downward from the position of the bracket 6a in the peripheral wall of the nose 2. As shown in FIG. 1, the upper edge portion 12a of the hole 12 forms a stop surface for the vertical guide claw 4 which is inclined in the peripheral wall of the nose 2 from the outer wall surface toward the inner wall surface. Form. The hole 12 is provided for the vertical guide claw 4 to enter into the nose 2 or to project outside the nose 2.

The vertical guide claw 4 is a substantially rectangular thick plate, and its inner end portion is curved in an arc shape. Also,
The vertical guide claw 4 is provided with an inclined surface 13 retracted from the inner end of the upper surface to the lower surface of the vertical guide claw 4. This is to reduce the weight of the vertical guide claw 4.

Expanding head 8a of bolt 7 and bracket 6a
Between the bracket 6b and the expanded plug 8b provided at the tip of the bolt 7 and the torsion coil spring 9
a and 9b coil portions 10a and 10b are bolts 7
It is arranged in a wound state. A rubber washer 11 is arranged between the expanded plug 8b and the coil portion 10b.

One end 14a of each of the torsion coil springs 9a and 9b is hooked on the lower surface of the vertical guide claw 4. On the other hand, the other end 1 of each of the torsion coil springs 9a and 9b
4b is hooked on the outer wall surface of the nose 2. As a result, the vertical guide claws 4 are
With a pair of torsion coil springs 9a and 9b,
It is biased clockwise and is in contact with the upper edge 12a of the hole 12.

The vertical guide claw 5 is also in contact with the upper edge 12a of the hole 12 while facing the vertical guide claw 4.
This results in, as shown in FIGS. 1 and 2,
Around the shaft in the nose 2, the lower surface outer peripheral edge 15b of the expanded circular head portion 15a of the nail 15 which is supplied into the nose 2 from the nail supply mechanism and hit by the driver 3 is generated from the torsion coil springs 9a and 9b. Hold it for a short time with some force. As a result, the upper surface of the head portion 15a of the nail 15 and the tip surface 3a of the driver 3 are brought into close contact with each other, whereby the nail 15
Align with the nose 2 axis.

The nail 15 further descends from the state shown in FIG. 1 and moves away from the inner end of the upper surface of the vertical guide claws 4 and 5, or at the same time immediately before, the tip 15c of the nail 15 penetrates into the nail driving material. start. As a result, the nail 15 is driven into the nail driving material in alignment with the axis of the nose 2 which is positioned perpendicularly to the preliminary nail driving material.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a nail holding device of a nailing machine according to the present invention.

2 is a plan view of the nail holding device of FIG. 1. FIG.

[Explanation of symbols]

 1 Nail Holding Device 2 Nose 2a Nose Tip Surface 3 Driver 3a Driver Tip Surface 4 Vertical Guide Claw 5 Vertical Guide Claw 9a Coil Spring 9b Coil Spring 12 Hole 12a Top Edge 15 Nail 15a Head

Claims (1)

[Scope of utility model registration request] 1. A nose provided with at least one pair of holes provided at a part of the nose retracted toward the body by a distance substantially corresponding to the nail length of the T-shaped nail from the tip surface of the nose, and said hole. Above the position, the at least one pair of pawls pivotally supported by the nose, the tip of which goes into and out of the nose through a hole, and the pawls pivoted so that the tip of the pawl is inserted into the nose. It consists of an urging spring and a means for stopping the pivotal movement of the pawl so that the tip of the pawl rests in the nose, and the tip of the pawl cuts the head of the nail hit by a rod-shaped driver. By holding for a short time,
A nail holding device for a nailing machine in which the tip of the driver is in close contact with the upper surface of the head of the nail and the axis of the nail is aligned with the axis of the nose.