JPH05372U - Nail holding device for nailer - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a nail holding device for a nailing machine which has the same ease of aiming a nailing position as a nailing machine having no nose holding device on its nose and has high durability. [Composition] 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 of the nose, and the position of the hole. At least one pair of pawls that are pivotally supported on the nose above and whose tip ends move in and out of the nose through holes, and a spring that urges the pawls to rotate so that the tip end of the pawl is inserted into the nose. And a means for stopping the pivotal movement of the nail so that the tip of the nail rests in the nose, and the tip of the nail holds the head of the nail hit by the rod-shaped driver for a short time. 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.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nail holding device for a nailing machine, and more particularly to a nail holding device for a nailing machine that holds a nail loaded in a nose at the tip of the nailing machine so that the nail can be driven in the axial direction of the nose. .

[0002]

[Prior art and its problems]

 Generally, in a nailing machine for driving a nail at a leading position of a connecting nail, which is formed by connecting a large number of T-shaped nails having circular expanding heads in parallel, into a nail driving material, a nose for driving the nail is used. Since the inner diameter of the nail is set to be slightly larger than the head diameter of the nail, the tip portion of the nail is easy to move. For this reason, when the driver cuts the nail from the connecting material by hitting the head of the nail 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 with a larger head than ordinary nails do not allow normal nails to break so that the edge of the head of the nail that is driven in at an angle does not break the cover paper that covers the surface of the gypsum board. The above accidents are more likely to occur even though the demand for vertical driving is stricter than that.

Therefore, the applicant of the present invention firstly guides the tip portion of the nail ejected from the nose of the nailing machine on the extension of the axis line of the nose to determine the posture of the nail on the surface of the material to be driven. I proposed some nail holding devices to hold vertically. An example thereof is the nail guide device in the nailing machine of Japanese Utility Model Laid-Open No. Sho 63-5 0679. In this nail guide device, the tip end of the nose is expanded in diameter, a tubular body is fixed to the tip, and a plurality of nail holding members are provided between the tip of the nose and the tubular body via an elastic body. Is provided, and the tip of the nail is held 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 a nail holding device of a 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 the respective tip portions of these nail guide elements are made to protrude beyond the tip portion of the nose to enter in the extension direction of the driving passage of the nose. Can be opened and closed in a retracted position and a position retracted from the extension direction of the driving passage, and these guide elements can be biased in the closing direction by elastic means to hold the nail in the driving passage 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 element is housed in the interior thereof to receive the nail guide element that has been opened and operated when the nail is driven.

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, the nail holding devices of these two examples are still provided on the outer periphery of the tip of the nose, so that the nail driving position of the nail driving material can be improved as compared with the nail driving machine without the nail holding device. There is a problem that impairs aimability. Further, since the nail holding devices of the above two examples are arranged at the tip portion 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]

[Problems to be solved by the device]

 An object of the present invention is to provide a nail holding device for a nailing machine which has the same ease of aiming at a nailing position as a nailing machine having no nail holding device on its nose and has high durability.

[0007]

[Means for Solving the Problems]

 The nail holding device of the nailing machine of the present invention comprises a nose provided with at least one pair of holes provided at a part of the nose retracted from the tip end surface by a distance substantially corresponding to the nail length of a T-shaped nail. , At least one pair of pawls that are pivotally supported by the nose above the position of the hole and whose tips are moved into and out of the nose through the holes, and claws so that the tips of the pawls are inserted into the nose. And a means for stopping the pivotal movement of the pawl so that the tip of the pawl is stopped in the nose, and the tip of the pawl is operated by a rod-shaped driver. By holding the head for a short time, the tip of the driver closely contacts the upper surface of the head of the nail, and the axis of the nail is aligned with the axis of the nose.

[0008]

[Effect of the device]

 Since the nail holding device of the present invention is provided at one part of the nose retracted from the nose tip surface toward the body, the nail driving position is as easy to aim as the nail driving device without the nail holding device. is there. 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]

【Example】

 A preferred embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 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 part at a right angle to a front portion of the grip, and a nail striking device that is provided in the body. It comprises a mechanism, 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 includes a rod-shaped driver 3 that reciprocates in the nose 2.

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

At the outer end of the vertical guide claw 4, the pair of brackets 6 a and 6 b project from the outer circumferential surface of the nose 2 in the horizontal axis direction to the outer side in the horizontal axis of the nose 2 and are spaced apart from each other. It is swingably supported by a bolt 7 that is inserted in the. A hole 12 extends axially downward from the position of the bracket 6a in the peripheral wall of the nose 2 between the pair of brackets 6a and 6b. As shown in FIG. 1, the upper edge portion 12a of the hole 12 forms a stop surface for the vertical guide pawl 4 which is inclined so as to gradually lower from the outer wall surface to the inner wall surface of the peripheral wall of the nose 2. Form. The holes 12 are for allowing the vertical guide claws 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. In addition, an inclined surface 13 is provided which is retracted from the inner end of the upper surface of the vertical guide claw 4 to the lower surface of the vertical guide claw 4. This is to reduce the weight of the vertical guide claw 4.

Between the expanding head 8 a of the bolt 7 and the bracket 6 a, and between the bracket 6 b and the expanding plug 8 b provided at the tip of the bolt 7, the coils of the torsion coil springs 9 a and 9 b are inserted. The parts 10a and 10b are arranged so as to be wound around the bolt 7. A rubber washer 11 is arranged between the expanded plug 8b and the coil portion 10b.

One ends 14 a of the torsion coil springs 9 a and 9 b are hooked on the lower surface of the vertical guide claw 4. On the other hand, the other ends 14b of the torsion coil springs 9a and 9b are hooked on the outer wall surface of the nose 2. As a result, the vertical guide claw 4 is always urged clockwise by the pair of torsion coil springs 9a and 9b as shown in FIG. Touching.

The vertical guide claw 5 is also in contact with the upper edge portion 12 a of the hole 12 while facing the vertical guide claw 4. As a result, as shown in FIGS. 1 and 2, the diameter of the nail 15 that is supplied into the nose 2 from the nail supply mechanism around the axis in the nose 2 and is hit by the driver 3 is expanded. The outer peripheral edge 15b of the lower surface of the circular head portion 15a is clamped for a short time with a certain amount of force generated by the torsion coil springs 9a and 9b. 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 is aligned with the axis of the nose 2.

The nail 15 further descends from the state shown in FIG. 1 and separates from the inner end of the upper surface of the vertical guide claws 4 and 5, and at the same time or immediately before, the tip 15c of the nail 15 penetrates into the nail driving material. Begin to. 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)

[Claims for utility model registration] [Claim 1] At least one pair of holes provided in a part of the nose retracted from the tip of the nose toward the body by a distance substantially corresponding to the length of the T-shaped nail. A nose provided with at least one pair of pawls pivotally supported by the nose above the position of the hole, the tip of which goes into and out of the nose through the hole, and the tip of the claw is inserted into the nose. And a means for stopping pivotal movement of the pawl so that the tip of the pawl is stopped in the nose, and the tip of the pawl is driven by a rod-shaped driver. By holding the head of the hit nail 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.