JPH07290371A - Fastening tool - Google Patents

Abstract

PURPOSE:To provide a fastening tool capable of using a short bolt and easily interchanging a nose piece. CONSTITUTION:This fastening tool 10 is provided with a hollow housing 15 for shrinking and fastening a hollow collar to a bolt to fit a part to a panel erected with the bolt, a jaw 16 retractably provided inside the housing 15 and holding the tip side of the bolt, and a nose piece 18 fitted at the tip portion of the housing 15 and coupled with the collar. The jaw 16 is retracted to extract the tip of the held bolt, ruptures the rupture section of the bolt, and extracts the tip portion of the bolt. The nose piece 18 shrinks the diameter of the coupling portion of the collar inward in the radial direction. A male thread is formed at the rear section of the nose piece 18, a female thread coupled with the male thread of the nose piece 18 is formed at the tip of the housing 15, and the nose piece 18 and the housing 15 are thread-connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention To mount a component on a panel, the present invention places the component in a state where its hole penetrates a bolt erected on the panel and attaches a collar to the bolt protruding from the component. A fastening tool for fixing a collar to a bolt by reducing a diameter of a part of the inside in a radial direction.

[0002]

2. Description of the Related Art A component is placed in a state of penetrating a bolt erected on a panel, a collar is attached to the bolt protruding from the component, and a part of the collar is radially inwardly reduced to collar the bolt. Fastening tools for fixing parts and attaching parts to panels are known. Such a fastening tool is provided with an elongated hollow housing and retractable inside the housing,
Equipped with a jaw that engages and grips the tip side of the bolt, and a nose piece that is attached to the tip of the housing and that engages the outer peripheral surface of the collar, the jaw retracts so as to pull out the tip of the gripped bolt. Then, the bolt is broken at the breaking portion to pull out the portion on the tip side of the bolt, and at the time of the breaking, the nose piece reduces the engaging portion of the collar radially inward and fastens the collar to the bolt. Is configured.

[0003]

In the conventional fastening tool, since the nose piece is attached to the tip of the housing by press fitting, it is difficult to replace the nose piece. In order to strengthen the attachment by press fitting, the nose piece portion is formed long, and in the conventional fastening tool, the jaw and the jaw case are arranged behind the nose piece, and the bolt gripping portion of the jaw is It is located considerably rearward from the tip of the nosepiece. For this reason, it is uneconomical to use a bolt having a very long broken portion. Japanese Patent Application Laid-Open No. 61-144415 discloses another fastening tool. This fastening tool is configured such that the tip of the housing directly engages the collar to reduce the diameter. Therefore, the bolt gripping portion of the jaw can be shortened, and the bolt may be short. However, in the fastening tool described in such publication, since the tip of the housing performs the diameter reduction of the collar, the entire housing has to be formed of a high-strength and high wear-resistant material for the diameter reduction of the collar. The entire tool becomes extremely expensive. In addition, if the housing tip wears due to long-term use, the expensive housing must be entirely replaced.

Therefore, it is an object of the present invention to provide a fastening tool which can use a short bolt and can easily replace a nose piece.

[0005]

In order to achieve the above object, according to the present invention, in order to attach a component to a panel, the component is placed with its hole passing through a bolt erected on the panel. Then, the collar is attached to the bolt protruding from the component, and a portion of the collar is radially inwardly reduced to fix the collar to the bolt, so that it is provided with an elongated hollow housing and retractable inside the housing, Equipped with a jaw that engages and grips the tip side of the bolt, and a nose piece that is attached to the tip of the housing and that engages the outer peripheral surface of the collar, the jaw retracts so as to pull out the tip of the gripped bolt. Then, the bolt is broken at the breaking portion and the tip side portion of the bolt is pulled out, and at the time of the breaking, the nose piece reduces the engaging portion of the collar radially inward and fastens the collar to the bolt. A fastening tool configured to have a thread formed on a rear portion of a nose piece and a screw threaded to a screw of the nose piece formed on a front end of a housing. It

In the present invention, a male screw can be formed on the outer surface of the rear portion of the nose piece and a female screw can be formed on the inner surface of the tip of the housing. In this case, the outer surface of the jaw case can be formed in a stepped shape so that the outer surface thereof becomes thinner toward the tip. In addition, the rear portion of the nose piece is extended rearward so as to surround the jaw case, the rear portion is formed to have a large diameter, a female screw is formed on the inner surface of the rear portion of the nose piece, and a male screw is formed on the outer surface of the housing tip. be able to. In that case,
It can be formed in a tapered shape so that the outer surface of the jaw case is tapered toward the tip. Further, the collar engagement and the reduced diameter portion of the nose piece can be formed short, and the tip of the jaw can be disposed near the collar engagement and the reduced diameter portion.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a fastening tool 10 according to the first embodiment of the present invention. The fastening tool 10 has a housing 12 having a handle 11 that can be held by hand. The housing 12 is composed of a main body housing 14 in which the handle 11 is formed, and a nose housing 15 which forms an elongated main portion together with the main body housing, and the nose housing 15 is screwed to the main body housing 14. The elongated housing main portion is formed hollow and various members are provided therein.

First, on the tip side of the nose housing 15, a pair of jaws 16 and 16 for holding the tips of bolts erected on the panel, and on the tip side of the jaws, the outer peripheral surface of the collar is attached. And a cylindrical nosepiece 18 which is engaged with the collar to reduce the diameter of the collar inward in the radial direction and to fasten the collar. The jaw 16 is surrounded by a jaw case 19 on the outside thereof, the rear end of the jaw case 19 is connected to a hollow connecting rod 20 extending rearward, and the rear end of the connecting rod 20 is a hollow piston extending further rearward. It is connected to the rod 22. The piston rod 22 extends to the cylinder 23 of the main body housing 14, and the piston 24 is connected to the cylinder portion. When the tool is operated, pressure oil is supplied to the front chamber 26 of the cylinder 23 through the pipe 27, and the piston 24 is moved rearward. On the outer peripheral surface of the connecting rod 20 connected to the jaw case 19, a coil spring 28 is provided between the tip portion of the connecting rod 20 and the tip side of the main body housing 14 to push the jaw case 19 forward and the piston 24.
Is biased to the front side. A portion of the front chamber 26 of the cylinder 23 is formed to have a smaller diameter than other portions, and serves as a stopper on the front side of the piston 24. When pressure oil is supplied to the front chamber 26, the movement of the piston 24 to the rear side is stopped at a fixed position by the supply amount of pressure oil. A hollow extension rod 30 is formed on the rear side of the piston 24, and a stopper 31 is provided adjacent to the rear end thereof.

A hollow cylindrical jaw pusher 32, which abuts the rear end of the jaw 16, is arranged at the inner tip of the connecting rod 20 connected to the jaw case 19, and is connected to the rear end of the jaw pusher 32. A coil spring 35 having a weak force is provided between the rod 20 and the small diameter portion 34 on the inner side, and pushes the pair of jaws 16 and 16 forward to bring them into contact with the inner surface of the jaw case 19. Since the coil spring 35 pushes the jaw 16 forward, the jaws 16, 16
When the tip of the bolt is inserted in between, the tooth surface of the jaw engages with the threaded portion of the bolt to securely grasp the tip of the bolt, and it is possible to prevent the grasped bolt portion from being pulled out forward. An elongated hollow tube 36 is provided at the center of the nose housing 15 and at the center of the cylinder 23 of the main body housing 14, and the tip end of the bolt whose inside is broken can be discharged backward from the front of the tool.

A screw is formed in the rear portion of the nose piece 18, and a screw which is screwed into the screw of the nose piece is formed at the tip of the nose housing 15.
It is screwed to the nose housing 15 (and thus the housing 12). This point will be described with reference to FIG. In FIG. 2, the nose piece 18 is formed of a hollow short tubular body, and is formed of a high-strength and high wear-resistant material due to the diameter reduction of the collar. On the tip side of the nose piece 18, the swage portion 3 which becomes a collar engagement and a reduced diameter portion.
8 is formed, and by pushing into the collar, the engaging portion of the collar is radially inwardly reduced to fasten the collar to the bolt. The outer surface side of the swage portion 38 is formed radially outward to have a large diameter to form a flange 39.
Also, on the outer surface of the rear portion of the nose piece 18, the male screw 4
0 is formed. A female screw 4 is attached to the inner surface of the tip of the nose housing 15 so as to be screwed into the male screw 40.
2 is formed. This allows the nosepiece 18
Is screwed to the nose housing 15 so that the nosepiece 18 can be easily attached and replaced. In this screw connection, the nosepiece 18 is screwed in until the flange 39 of the nosepiece 18 abuts on the tip surface of the nose housing 15.

The nose piece 18 is a nose housing 15
Since the nosepiece 18 is formed with a short length, it is possible to prevent the accidental disconnection from the nose housing 15. Therefore, the nosepiece 18 is formed short. Further, the outer surface 43 of the jaw case 19 is formed in a stepped shape so as to become thinner toward the tip. Due to the step-like formation, not only the jaw case 19 can be tapered, but also the tip portion 44 of the nose housing 15 can be formed to have a small diameter, whereby the tip portion of the fastening tool 10 can be formed thin and even in a narrow space. Can work. Further, the step portion 46 of the jaw case 19 has a shoulder portion 47 formed by the small-diameter tip portion of the nose housing 15.
The shoulder 47 serves as a stopper for the forward movement of the jaw case 19. Since the jaw case 19 is formed in a taper shape and the tip portion thereof extends to the position adjacent to the swage portion 38 of the nose piece 18, the jaw case 1
The 6, 16 can be located near the swage portion 38 of the nosepiece 18. As a result, the jaw 16 is fastened to the fastening tool 10
Since it is located near the tip of the jaws 16, the jaws 16, 16 are able to engage their threaded surface 48 on the threaded portion of the bolt, even with the use of a short bolt, to securely grip the bolt tip.

Using the fastening tool 10 having the above structure,
An operation of attaching a component to a panel by fastening a collar to a bolt erected on the panel will be described with reference to FIGS. 3 to 5. In FIG. 3, a panel 51 is provided with a bolt 51 having a thread formed thereon by welding or the like. The bolt 51 has a small-diameter portion serving as the breakage portion 52 at the intermediate height position. A component 54 is mounted on the panel 50 with its hole 55 penetrating the bolt 51. Then, the bolt 51 protruding from the component 54
The collar 56 is pushed in. The color 56
The flange 58, the hexagonal portion 59, and the cylindrical reduced-diameter portion 60 are integrally formed so that they can be removed after being fastened to the bolt 51 and reused. The nose piece 18 of the fastening tool 10 is used for such a collared bolt.
Then, the fastening tool 10 is applied to the bolt 51 so that the tip portion 62 of the bolt 51 is received, and the panel 50 is directly held.
Press on. As a result of this pressing, as shown in FIG. 3, the tip portion 62 of the bolt 51 protruding from the collar 56 is inserted between the pair of jaws 16 and the jaws 16 and
6, the swage portion 38 of the nosepiece 18 comes into contact with the tip of the reduced diameter portion 60 of the collar 56.

In FIG. 4, a switch (not shown) provided on the handle 11 is pressed to supply pressure oil from the pipe 27 to the front chamber 26 of the cylinder 23, and the piston is biased forward by the coil spring 28. 24 is retreated with a strong force. Due to this retracting force, the piston 24 moves the piston rod 22, the connecting rod 20, and the jaw case 1.
Retract 9 with a strong force, and as the jaw case retracts,
The jaws 16 and 16 are also the tip portions 6 of the bolts 51 gripped.
Move backward to pull out 2 strongly. The nose piece 18 is pushed forward with a strong force by the reaction of the bolt pulling out of the jaw 16, and the collar 5 with which the swage portion 38 abuts.
The diameter-reducing portion 60 of 6 acts to reduce the diameter. Joe 16
The pulling-out force of the bolt 51 by the force is so strong that the bolt 51 breaks from the breaking portion 52, and the strong pulling-out force causes the nose piece 18 to match the inner surface of the reduced diameter portion 60 of the collar 56 with the threaded surface of the bolt 51. Then, the diameter is reduced, and the collar is fastened to the bolt 56. FIG. 4 shows a state in which the piston 24 is retracted and the bolt is broken.

In FIG. 4, the piston 24 is the pipe 2
Due to the amount of pressure oil supplied from 7 to the front chamber 26, the rear end of the rear extension rod 30 is retracted to a position close to the stopper 31. By retreating the piston 24,
Piston rod 22, connecting rod 20, jaw case 1
9 and the jaw 16 are retracted together with the broken bolt tip 62. After fastening the collar 56 to the bolt 51, the switch is released, and the pressure oil supplied to the cylinder 24 is returned to the reservoir (not shown) provided in the handle 11 through the pipe 27. The piston 24 is returned to the front together with the piston rod 22, the connecting rod 20, the jaw case 19, and the jaw 16 by the restoring force of the coil spring 28. By this return, the jaw case step portion 46
Comes into contact with the nose housing shoulder 47 and jaw case 1
The forward movement of 9 is stopped.

In FIG. 5, the reduced diameter portion 60 of the collar 56 is reduced in diameter and fastened to the bolt 51 standing on the panel 50, whereby the component 54 is attached to the panel 50. The fastened collar 56 then acts as a nut and can be removed and reattached by engaging the hexagonal portion 59 with the tool and rotating. In addition, the broken bolt tip portion 62 grasped by the jaw 16
The negative pressure is supplied to the outlet portion 63 at the rear end of the tool 10 to move it through the tube 36 toward the rear of the tool and is discharged from the outlet portion 63. A container (not shown) is attached to the outlet portion 63 so that the broken bolt tip portion 62 is collected in the container. Further, the engaging surface of the jaw 16 to the bolt has a tooth surface 48 (see FIG. 2) that can easily receive and hold the bolt, but cannot be pulled out.
2 can be easily discharged.

FIG. 6 shows a second embodiment of the fastening tool. In this embodiment, the shapes of the nosepiece 65 and the jaw case 66 are different from those of the first embodiment shown in FIGS. 1 to 5, and the shape of the nose housing 67 is also different. The jaws 16 are formed in the same shape.
In the second embodiment, the nose piece 65 is formed so that its rear portion extends rearward so as to surround the jaw case 66 and has a large diameter. Also in this second embodiment, the nose piece is screwed to the nose housing. Therefore, a female screw 69 is formed on the inner surface of the rear portion of the nose piece 65, and a male screw 7 is formed on the outer surface of the tip of the nose housing 67.
0 is formed. The nose housing 67 is
Since the nose piece 65 is formed to be long rearward, it does not extend to the tip of the tool as in the first embodiment, but is short. Further, the jaw case 66 is the nose piece 6
Along the inner side of 5, the outer surface is tapered so that the outer surface becomes thinner toward the tip. By these, the tip portion of the fastening tool 10 can be formed thin, and it is possible to work even in a narrow space. Further, since the jaw 16 can be arranged near the swage portion 71 of the nose piece 65 and the jaw 16 is located near the tip of the fastening tool 10, the tip of the bolt can be reliably gripped even if a short bolt is used.

[0017]

According to the fastening tool of the present invention, a screw is formed in the rear portion of the nose piece, and a screw that engages with the screw of the nose piece is formed at the tip of the housing so that the nose piece is screwed to the housing. Since the nose piece can be easily replaced and the jaw can be placed near the engagement and reduced diameter portion of the nose piece, the tip of the bolt can be reliably gripped even with a short bolt. The tip part of the fastening tool can be formed thin so that fastening work can be performed even in a narrow space.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a fastening tool according to a first embodiment of the present invention in which a main portion is sectioned and a lower portion of a handle is omitted.

FIG. 2 is a cross-sectional view showing details of a tip portion of the fastening tool shown in FIG.

FIG. 3 is a partial cross-sectional view of the fastening tool showing a state in which the fastening tool of FIG. 1 is arranged on a collared bolt.

FIG. 4 is a partial cross-sectional view of the fastening tool showing an operating state of the fastening tool of FIG.

FIG. 5 is a partial cross-sectional view of the fastening tool showing a completed state of the fastening operation of the fastening tool of FIG.

FIG. 6 is a sectional view showing details of a tip portion of a fastening tool according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Fastening Tool 11 Handle 12 Housing 14 Main Body Housing 15 Nose Housing 16 Jaw 18 Nosepiece 19 Jaw Case 20 Connecting Rod 22 Piston Rod 23 Cylinder 24 Piston 26 Cylinder Front Room 27 Pipe 28 Coil Spring 31 Stopper 32 Jaw Pusher 36 Tube 38 Swage Part (engagement and reduced diameter portion) 39 Flange 40 Male screw 42 Female screw 48 Jaw tooth surface 50 Panel 51 Bolt 52 Broken portion 54 Parts 56 Color 60 Color reduced portion 65 Nose piece 66 Jaw case 67 Nose housing

Claims (6)

[Claims] 1. To attach a component to a panel, the component is placed with its hole penetrating a bolt standing on the panel, and a collar is attached to the bolt protruding from the component,
A fastening tool for fixing a collar to a bolt by reducing a diameter of a part of the collar inward in a radial direction, which is an elongated hollow housing, and is provided so as to be retractable inside the housing, and a tip of the bolt. A jaw that engages and grips the side surface on the side and a nose piece that is attached to the distal end portion of the housing and that engages with the outer peripheral surface of the collar, the jaw so as to pull out the tip of the bolt that is gripped. When retracting, the bolt is broken at the breaking portion and the tip side portion of the bolt is pulled out, and at the time of the breaking, the nose piece reduces the engaging portion of the collar inward in the radial direction to make the collar into the bolt. In a fastening tool configured to fasten,
A fastening tool, wherein a screw is formed on a rear portion of the nose piece, and a screw which is screwed with a screw of the nose piece is formed on a tip of the housing. 2. The fastening tool according to claim 1, wherein a male screw is formed on the outer surface of the rear portion of the nose piece, and a female screw is formed on the inner surface of the tip of the housing. tool. 3. The fastening tool according to claim 2, wherein the jaw case is formed in a step shape so that the outer surface of the jaw case becomes thinner toward the tip. 4. The fastening tool according to claim 1, wherein a rear portion of the nose piece extends rearward so as to surround the jaw case, and the rear portion is formed to have a large diameter. A fastening tool, wherein a female screw is formed on an inner surface of the portion, and a male screw is formed on an outer surface of the housing tip. 5. The fastening tool according to claim 4, wherein the jaw case is formed in a tapered shape so that the outer surface of the jaw case is tapered toward the tip. 6. The fastening tool according to claim 1, wherein the collar engagement and the reduced diameter portion of the nose piece are formed to be short, and the tip of the jaw is arranged close to the collar engagement and the reduced diameter portion. Fastening tool characterized by being.