JPS6013588Y2 - Auxiliary tool for reinforcing steel gas pressure welding - Google Patents

Description

[Detailed description of the invention] This invention is used by attaching it to a blowpipe for reinforcing steel gas pressure welding, which is used when adding the next reinforcing bar to the upper end of a vertically erected lower reinforcing bar at a construction site, etc. It concerns assistive devices.

For gas pressure welding of reinforcing steel, the ends of the upper and lower reinforcing bars are abutted and fixed using a reinforcing bar supporter, and the abutment area is surrounded by multiple flames emitted from the mouth of a blowpipe for gas pressure welding, which heats the abutment area. After the upper reinforcing bars are brought into close contact with the lower reinforcing bars, the upper reinforcing bars are firmly pressed against the lower reinforcing bars using a hydraulic cylinder, etc., and the area around them is heated and pressure welded.

The biggest cause of breakage of reinforcing bar welds due to gas pressure welding as mentioned above is the formation of an oxide film on the pressure weld.
The formation of such an oxide film occurs when the flame deviates from the pressure welding part before the ends of the matched reinforcing bars are brought into close contact.

However, it is extremely difficult to maintain the mouthpiece of the blowpipe in the correct position at a constant distance from the press-contact portion of the reinforcing steel.

As a device to solve such problems,
-There is a device described in Publication No. 148640, but this device fixes a support tube to a blowpipe for reinforcing gas pressure welding, inserts a telescoping rod into this support tube, and supports this with a spring. The V-shaped reinforcing bar bracket at the tip of the rod is placed against the reinforcing steel, but the support tube and the blowpipe for pressure welding the reinforcing steel gas are fixed together, making it difficult to fix the gas expandable rod in any desired position. There is a problem with this point.

The purpose of this invention is to solve the problems of the conventional devices as described above.

That is, this invention is an auxiliary tool for reinforcing steel gas pressure welding in which a reinforcing bar fixing rod having a V-shaped reinforcing bar fixing part at the tip is inserted into a guide pipe for attaching a blowpipe for reinforcing steel gas pressure welding so that it can move forward and backward. Fixing of the blowpipe for reinforcing steel gas pressure welding consists of a tightening member that can be freely tightened with a tightening bolt against the moving member, and both members have grooves facing each other to hold the blowpipe for welding the reinforcing steel gas pressure welding. Attach a guide tube to the section with a tightening bolt so that it can be rotated freely and fixed at any angle, and a reinforcing bar fixing rod having a V-shaped reinforcing bar fixing part at the tip is fitted into the guide tube so that it can move forward and backward, By loosely inserting a tightening bolt into the axial long hole provided in the guide tube and screwing this bolt into the threaded hole provided in the reinforcing rod, the reinforcing rod can be fixed at any position relative to the guide tube. This is how it was done.

The details of this invention will be explained below based on an embodiment shown in the attached drawings.

In the figure, A is a fixing member of a blowpipe for pressure welding of reinforcing steel gas, which is composed of a rotating member 1 and a tightening member 2.

The lower end of the rotating member 1 protrudes further downward than the lower end of the tightening member 2, and the tightening bolt 3, which is rotatably inserted into the insertion hole provided in this protruding portion, is inserted into the threaded hole at the rear end of the guide tube 4. It can be fixed by screwing into it so that it can be rotated and detached freely.

In addition, semicircular grooves 6 and 7 into which the reinforcing steel gas pressure welding blowpipe 5 is fitted are provided on the opposing surfaces of the two members 1 and 2, and the grooves 6 and 7 are provided so that the blowpipe 5 for pressure welding of reinforcing steel gas is inserted into the two insertion holes provided in the rotation member 1. The freely inserted tightening bolt 8 is screwed into two screw holes provided in the tightening member 2 and tightened.

Reference numeral 9 denotes a reinforcing bar fixing rod whose rear part is fitted into the guide tube 4 so as to be able to move forward and backward, and a V-shaped reinforcing bar fixing part 10 is integrally provided at the tip thereof.

Further, a tightening bolt 12 is fitted into the elongated hole 11 provided in the guide tube 4 so as to be freely movable, and the bolt 12 is screwed into the threaded hole near the rear of the fixing rod 9 and fixed by tightening the bolt 12. The rod 9 can be arbitrarily fixed to the guide tube 4.

Further, a tension spring 13 is inserted into the guide tube 4, and both ends of the tension spring 13 are connected to the rear end of the fixing rod 9 and the inner rear end of the guide tube 4.
is pulled rearward by a spring 13.

The tip of the blowpipe 5 is bifurcated, and four inward-facing craters 14 are provided so that the flames emitted from each tube 14 are concentrated at one point.

This invention has the above-mentioned configuration, and as shown in Fig. 4, the lower reinforcing bars 15 and the upper reinforcing bars 16 are attached to a known reinforcing bar supporter 17, the ends of both reinforcing bars 15 and 16 are abutted, and each bolt is bolted. 18.

Next, when the fixing rod 9 is advanced against the spring 13 and the fixing part 10 at the tip is brought into contact with the reinforcing bar 15, as shown in FIG.
As shown in FIG. 4, each bolt 3,8.
Tighten 12.

In this state, flame is ejected from each member 14 to heat the pressure welding part a, and when the ends of both reinforcing bars 15 and 16 are in close contact with each other, the upper bolt 18 is loosened, and the upper reinforcing bar 16 is tightened using a hydraulic cylinder or the like. The lower end is crimped to the upper end of the lower reinforcing bar 15, the bolt 12 is loosened and the fixing rod 9 is moved back by the spring 13, and if necessary, the bolt 3 is loosened and the guide tube 4 is rotated downward, leaving the blowpipe 5 free. The vicinity of the press-welded part a is heated by moving the crater 14 to finish the press-welded part a, and then the reinforcing bar supporter 17 is removed.

In the auxiliary tool of this invention, the position of each crater 14 is held at a predetermined position by applying the reinforcing bar fixing part 10 at the tip of the reinforcing bar fixing rod 9 to the reinforcing bar 15 as described above.

For this reason, the flame does not shift from the pressure weld part a until the pressure weld part a is completely in contact, so there is no risk of an oxide film forming on the pressure weld part. It is removably fixed to the fixed part of the auxiliary tool by being caught in a groove provided opposite to the member and tightened with a tightening bolt, and the blowpipe is securely fixed when fixed, and when not in use, it can be removed from the auxiliary tool. It is convenient because it can be easily separated.

In addition, the reinforcing bar fixing rod can be fixed in any position relative to the guide tube with a tightening bolt loosely fitted into the long hole of the guide tube, making adjustment easy. After adjustment, fix the fixing rod to the guide tube with the tightening bolt. This makes it easy to hold the blowpipe in place.

Furthermore, the guide tube is connected to the fixed part with a tightening bolt, and when the tightening bolt is loosened, it can rotate freely.
During the initial pressure welding, the fixing rod is fixed in a fixed position by tightening the tightening bolt, and when the heating pressure welding is over and the area around the pressure welding area is heated to finish, the reinforcing bar fixing rod is tightened to the guide tube. By loosening the bolts and the tightening bolts that fixed the guide rod to the fixed part, the reinforcing bar fixing rod can be moved downward away from the reinforcing steel, so the blowpipe for reinforcing steel gas pressure welding can be moved freely to attach the desired part. It has the unique effect of being able to be finished by heating freely.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the aid of this invention, Fig. 2 is an enlarged longitudinal sectional side view showing a part of the same, Fig. 3 is a plan view showing the use of the aid of this invention, and Fig. 4 is the same as the above. FIG. 1... Rotating member, 2... Tightening bolt, 9... Reinforcement fixing rod, 2... Tightening member, 3.8. 1 4...Guide pipe, 5...Blowpipe, 10...
...Reinforcing bar fixing part, 11...Long hole, 13...
...Tension spring, 14... Crater, 15°16...
...Reinforcing bar, a...pressure welding part, A...fixing member.

Claims (1)

[Scope of utility model registration request] In an auxiliary tool for reinforcing steel gas pressure welding, in which a reinforcing bar fixing rod having a V-shaped reinforcing bar fixing part at the tip is inserted into a guide pipe for attaching a blowpipe for reinforcing steel gas pressure welding, so as to be able to move forward and backward, the rotating member and the rotating member It consists of a tightening member that can be tightened freely with a tightening bolt, and both members have grooves facing each other for clamping the blowpipe for reinforcing steel gas pressure welding.A guide pipe is attached to the fixed part of the blowpipe for reinforcing steel gas pressure welding. A reinforcing bar fixing rod having a V-shaped reinforcing bar fixing part at the tip is fitted into the guide tube so as to be able to move forward and backward, and is also provided on the guide tube. Reinforcing steel gas pressure welding in which a tightening bolt is loosely inserted into a long hole in the axial direction, and this bolt is screwed into a screw hole provided in a reinforcing bar fixing rod, so that this reinforcing bar fixing rod can be fixed at any position relative to a guide tube. aids for use.