JPH08174237A - Reinforcing bar clamping device of pressure welding machine - Google Patents

Abstract

PURPOSE: To easily demount a pressure welding machine by providing a crown body free to turn in the moving direction of reinforcing bar to tip of a support screw for reinforcing bar. CONSTITUTION: A support screw 512 for reinforcing bar is mounted to a slider 103 fitted into a pressure welding machine free to slide. By abutting a reinforcing bar 119b to the positioning groove 514 of slider 103 and by screwing in the support screw 512 for reinforcing bar, the reinforcing bar 119 is held. By moving the slider 103 by a hydraulic device, the reinforcing bar 119b is pressure- welded. Joined part of both reinforcing bars is heated and pressure welded/fixed. At pressure welding, the reinforcing bar 119b is bent, the crown body 525 at tip of support screw 512 is moved free to turn and follows the movement. At completing pressure welding/fixing, pressing action is released. Bending of the reinforcing bar 119b is relaxed and the the crown body 525 is returned to the original position, screwing of the support screw 512 is released, the pressure welding machine is easily demounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rebar material gripping device for a pressure welding machine used for joining a bar-shaped metal such as a rebar used in a concrete structure.

[0002]

2. Description of the Related Art Conventionally, a pressure welding machine for connecting a plurality of rod-shaped metals such as reinforcing bars used for a concrete structure and connecting their end faces to each other has been well known (July 2).
-8627).

In FIGS. 6 to 9, reference numeral 101 denotes a conventional pressure welding machine. The crimping machine 101 is a crimping machine main body 1 including a bottomed cylindrical body having a guide slit 102a at one end.
02, a slider 103 slidably inserted into the press body 102, a fixed chuck member 104 fixed to the other end of the press body 102, and having a fixed chuck 104c at the tip. , The base 105a is fixed to one end of the slider 103, and the intermediate portion 105b is connected to the guide slit 102a.
, A movable chuck member 105 having a movable chuck 105c at the tip, a connecting portion 107 connected to a hydraulic device 106, and a slider 103 provided inside the press-contacting machine main body 102. It is composed of an extensible spring 109 for returning to the initial position.

[0004] The fixed chuck member 104 includes a base 104a.
Is fixed to the lower portion of the cylindrical body 102, and the tip portion 104b is
A fixed chuck 104c is provided. The fixed chuck 104c has a contact portion 41 forming a U-shaped concave portion 110.
1 and a chuck portion 413 to which a first reinforcing member supporting screw 412 is screwed. On the inner surface of the contact portion 411, a positioning groove 4 for positioning the reinforcing member is provided.
14 is formed.

The movable chuck member 105 has an intermediate portion 1
05b is fitted in the guide slit 102a of the press-fitting machine main body 102, the base portion 105a thereof is fixed to the slider 103, and a movable chuck 105c is provided at the outer end portion thereof. The movable chuck 105 c includes a contact portion 111 forming a U-shaped concave portion 110 and an opposing portion 113 in which a screw 112 for supporting a second reinforcing bar is screwed. Is formed with a positioning groove 114 for positioning the rebar material. The movable chuck member 105 is configured to move in the axial direction of the crimping machine main body 102 with the intermediate portion 105b fitted in the guide slit 102a.

The press-contacting machine having the above-mentioned structure is used for press-fitting and fixing of vertically extending reinforcing bars called column reinforcing bars, and for horizontal reinforcing bars called beam reinforcing bars.

FIG. 8 shows a state in which the pillars are pressed and fixed, and FIG. 9 shows a state in which the pillars are clamped and the pressure welding machine is operated to press the pillars.
The fixed states are shown. First, the side portion of one rebar material 118b is brought into contact with the contact portion 411 of the fixed chuck 104c, and the screw 412 for supporting the first rebar material is screwed, so that one rebar material 118b is fixed to the fixed chuck member 104.
To be clamped. Next, the side portion of another reinforcing member 119b is brought into contact with the contact portion 111 of the movable chuck 105c,
By screwing the second reinforcing bar supporting screw 112, the other reinforcing bar material 119b is moved to the movable chuck member 10
5 Then, the slider 103 is attached to the pressure welding machine main body 1.
In the axial direction of 02, the end surface of the second reinforcing bar material 119b is brought into contact with the end surface of the first reinforcing bar material 118b. In this state, the hydraulic device 106 is operated while the joint A of the both reinforcing members is heated by the burner device 120, and the slider 103 is pushed to press the reinforcing member 119b against the reinforcing member 118b, thereby pressing the reinforcing member 119b. It is press-fitted and fixed to the reinforcing bar 118b. In FIG. 8, reference numeral 121 indicates a reinforcing bar material 119a
Bulges formed by pressing against each other, commonly known as bumps, 118
Reference numerals c and 119c denote non-welded reinforcing bars, respectively.

When the reinforcing member 118b and the reinforcing member 119b are pressed and pressed against each other, the two reinforcing members 118b and 119b are pressed against each other while being pressed against each other by the hydraulic device 106 as shown by a two-dot chain line in FIG. Therefore, it bends in the left-right direction about the perpendicular from the joint A.

[0009]

In the conventional crimping machine, the reinforcing bar material 118b is supported by tightening the first reinforcing bar supporting screw 412 to the fixed chuck 104c, and the reinforcing bar material 119b is supported by the movable chuck member 105. It is supported by tightening the screw 112 for supporting the reinforcing bar.

Therefore, the reinforcing member 118b and the reinforcing member 119 are provided.
b is the fixed chuck member 104 and the movable chuck 104 for fixing the reinforcing bar material 119b and the reinforcing bar material 118b unless the first reinforcing bar material supporting screw 412 and the second reinforcing bar supporting screw 112 are strongly tightened. It cannot be supported by the member 105. Then, when the pressure welding is completed and the pressure welding machine is removed, the tightening force between the first reinforcing bar supporting screw 412 and the second reinforcing bar supporting screw 112 is released with the same force as in the above tightening. If this is not done, the pressure welding machine cannot be removed from the rebar material, and there is the problem of poor work efficiency.

[0011]

According to the present invention, there is provided a press-connecting machine main body having a bottomed cylindrical body having an axial guide slit formed at one end thereof, and a press-fitting machine main body having the other end formed at the other end thereof. A fixing portion which is provided so as to protrude in the same direction as the guide slit, and which has a tip portion with which the side portion of the first reinforcing member is in contact, and a chuck portion which is located opposite to the contact portion. A fixed chuck member on which a chuck is formed, a first reinforcing bar supporting screw provided on the facing portion, a slider slidably fitted inside the press-applying machine main body, The base part is fixed to the child, the middle part fits into the guide slit, and the contact part where the side of the second reinforcing material abuts on the tip and the chuck part located opposite to this contact part The movable check member provided with the movable check configured and the chuck In a pressure welding machine having a second reinforcing bar supporting screw, the tip of the first reinforcing bar supporting screw and the second reinforcing bar supporting screw is rotated in the moving direction of the reinforcing bar. A crimping machine has a rebar material gripping device provided with a freely supported crown.

[0012]

According to the present invention, a crown body rotatably supported in the direction of movement of the rebar is provided at the tip of the first and second rebar supporting screws. When the pressing is released and the rebar material returns, the crown rotates along with it and the first and second rebar supporting screws are loosened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 to 5, FIG. 6 to FIG.
The same reference numerals are given to the same components as those of the conventional configuration described above, and the description is omitted.

In FIG. 1, the movable chuck 505c is
It is composed of a contact portion 511 and a chuck portion 513 in which a screw 512 for supporting a second reinforcing bar facing the contact portion 511 is screwed. In addition, the fixed chuck 604 has a contact portion 611.
And a chuck portion 613 to which a screw 612 for supporting the first reinforcing member is screwed.

A first screw 612 for supporting a reinforcing member,
The structure of the screw 512 for supporting the reinforcing steel is the same as that of the screw 512 for supporting the reinforcing steel, except for the respective mounting positions.

As shown in FIGS. 2 to 5, a spherical inner surface 520, which is spherically hollowed, is formed at the tip of the screw 512 for supporting the second reinforcing bar, and a shaft is formed at the center of the shaft. A hole 521 is formed in the direction. A turning crown 525 is provided at the tip of the second reinforcing-bar supporting screw 512. The rotating crown 525 has a spherical outer shape 526 that engages with the spherical inner surface 520, and a double annular tip 527.
And a through-hole 528 that is bored in the axial direction at the center and that tapers toward the spherical surface. The outer periphery 526 of the rotating crown 525 is arranged at the tip of the second reinforcing bar supporting screw 512 so as to abut the spherical inner surface 520, and the rotating crown 525 and the second reinforcing bar supporting screw 512 are arranged. Through the through hole 528 and the hole 521, insert the headed support rod 529, and tighten the bolt with the bolt 530 at the rear end of the second reinforcing steel support screw 512. The moving crown 525 is supported by the tip of the second screw 512 for supporting the reinforcing bar.

In the above embodiment, the headed support rod 529 is attached to the rear end portion of the screw 512 for supporting the second reinforcing bar by the bolt 530.
Although the example in which the bolt was tightened with the support rod 529 was shown, the support rod 529 is connected to the support rod 5 from the rear end of the screw 512 for supporting the second rebar material.
It is also possible to project the rear part of 29 and weld the rear part to fix it to the outer side of the rear end part of the second reinforcing member supporting screw 512.

The reinforcing bar 119b is made to abut the side portion of the reinforcing bar 119b with the positioning groove 514, and the second reinforcing bar supporting screw 512 is screwed into the positioning groove 514. The abutting portion 511 and the tip end portion 52 are made to come into contact with the side portion 527 by the side portion of the reinforcing bar 119b.
It is held between 7 and.

The reinforcing bar 119b is moved so that the end face thereof comes into contact with the end face of the reinforcing bar 118b in a state where the reinforcing bar 119b is sandwiched and supported between the contact portion 511 and the tip end portion 527. The joint A is heated by the burner device 120 while being pressed against the reinforcing member 119b.
And the rebar material 118b are pressed and fixed (see FIG. 8).

At this time, the reinforcing bar material 119b is the reinforcing bar material 118.
Since it is pressed by the hydraulic device 106 to b, it bends in the left-right direction about the perpendicular from the joint A. Along this curve,
As shown in FIG. 5, the crown 525 rotates in the direction indicated by the two-dot chain line arrow. Then, when the pressure contact / joining is completed, the hydraulic device 106
, The pressing action between the reinforcing bar 119b and the reinforcing bar 118b is released.

When the pressing action between the reinforcing bar 119b and the reinforcing bar 118b by the hydraulic device 106 is released, the reinforcing bar 1 is released.
The 19b and the reinforcing bar 118b return from the curved state to the state shown by the solid line in FIG. As a result, the tip 527 of the crown 525 also returns to the original position shown by the solid line. When the crown 525 returns, the screws 5 for supporting the second rebar material are formed.
The tightening condition of No. 12 is alleviated.

[0022]

According to the present invention, a crown is provided at the tips of the first reinforcing screw and the second reinforcing material supporting screw so as to be rotatable in the direction of movement of the reinforcing bar. The crown body rotates following the return of the two reinforcing bars, the first reinforcing-bar supporting screw and the second reinforcing-bar supporting screw are loosened, and the crimping machine can be easily removed. Work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a front view of a reinforcing bar gripping device of a pressure welding machine showing one embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the movable chuck of FIG.

FIG. 3 is an exploded perspective view of a tip portion of a first reinforcing bar supporting screw.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a cross-sectional view showing a support state of a first reinforcing screw.

FIG. 6 is a perspective view of a conventional pressure welding machine.

FIG. 7 is a partially broken front view of a conventional pressure welding machine.

FIG. 8 is a perspective view showing a state in which a column bar is pressed and fixed using a conventional pressure welding machine.

FIG. 9 is a front view showing a state in which a pillar is clamped by a conventional crimping machine, and the pillar is pressed and fixed.

[Explanation of symbols]

 102 Pressure Welding Machine Body 103 Slider 604 Fixed Chuck Member 604c Fixed Chuck 505 Movable Chuck Member 505c Movable Chuck 612 First Reinforcing Material Support Screw 512 Second Reinforcing Material Support Screw 525 Crown

Claims (1)

[Claims] 1. A crimping machine main body having a bottomed cylindrical body and having an axial guide slit formed at one end thereof, and a crimping machine main body having the other end provided in the same direction as the guide slit. A fixed chuck formed so as to protrude and formed by a contact portion where the side portion of the first reinforcing member abuts on the tip portion and a chuck portion located opposite to the contact portion. A member, a first reinforcing-bar supporting screw provided in the opposing portion, a slider slidably fitted inside the crimping machine main body, and a base fixed to the slider. A movable check is provided which includes an abutting portion in which an intermediate portion is fitted in the guide slit, and a tip of which a side portion of the second reinforcing member abuts and a chuck portion located opposite to the abutting portion. Movable check member and second reinforcing member support provided on the chuck portion And a crown body rotatably supported in the moving direction of the rebar at the tip of the first rebar supporting screw and the second rebar supporting screw. A rebar material gripping device for a pressure welding machine.