JPH01138070A - Manufacture of reinforcing bar - Google Patents

Abstract

PURPOSE:To automatically perform resistance welding of set reinforcing bars by guiding a slide electrode base freely slidably between parallel slide guides of a pedestal and fitting a guide for a main reinforcing bar and a lower electrode at a proper interval on the slide electrode. CONSTITUTION:After setting of the reinforcing bars is completed, a hydraulic cylinder 24 of a feed driving part C is actuated and the slide electrode 3 is drawn in the direction of a weld zone B and when an attached reinforcing bar F' of the forefront comes to the position of the weld zone B, a limit switch 26 is operated to stop a feed action of the slide electrode 3. When the attached reinforcing bar F' is sent to the weld zone B, a hydraulic cylinder 19 is operated to lower an upper electrode 18 and the attached reinforcing bar F' is pressed from above. The attached reinforcing bar F', the lower electrode 4 and the slide electrode 3 are then pressed down at the same time and the attached reinforcing bar F' is firmly held between the upper electrode 18 and the lower electrode 5. A first pressing electrode 20 is advanced and the main reinforcing bar F is pressed from the outside and a welding current is carried to between both electrodes 5 and 20 and the main rein forcing bar F and the attached reinforcing bar F' are subjected to butt welding.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention Industrial Field of Application The present invention is directed to reinforcing reinforcing bars such as reinforcing diagonal bars arranged diagonally at the corner of an opening in a concrete wall of reinforced concrete construction or steel-framed reinforced concrete construction. The present invention relates to manufacturing equipment.

Conventional technology Conventionally, two main reinforcing bars, as shown in Figure 14, have been used as reinforcing reinforcing bars that have a good grip around concrete, have strong adhesion, are easy to arrange, and can improve work efficiency. A so-called ladder-shaped reinforcing reinforcing bar has been developed in which a plurality of attached reinforcing bars F' are integrally arranged at appropriate intervals within the same plane between the bars F.

The reinforcing reinforcing bars were manufactured by integrating the abutting portions of both ends of the attached reinforcing bars F' by arc welding G, as shown in FIG.

Problems to be Solved by the Invention However, the above-mentioned conventional manufacturing method using arc welding not only takes time and effort, but also has problems such as spatter and pinholes are likely to occur.

The present invention has been made to solve the above conventional problems, and its purpose is to automatically resistance weld set reinforcing bars and improve welding accuracy and efficiency. An object of the present invention is to provide a manufacturing device for reinforcing reinforcing bars.

Means for Solving the Constituent Problems of the Invention The reinforcing reinforcing bar manufacturing apparatus of the present invention includes slide guides extending from the reinforcing bar set part to the welding part on the base, and A slide electrode stand is slidably guided, two main reinforcing bars are set in parallel in the longitudinal direction on the slide electrode stand, and a plurality of attached reinforcing bars are placed in the same plane between the main reinforcing bars. a setting means for setting the butt state at appropriate intervals; an upper electrode for pressing and gripping the attachment reinforcing bars; a first pressurizing electrode for pressurizing one of the two main reinforcing bars from the outside; and the other main reinforcing bar. A second pressure electrode that presses the reinforcing bar from the outside, a power source that flows a current between the upper electrode and each pressure electrode, and a drive means that intermittently sends the slide electrode stand to the welding part at predetermined intervals. It is characterized by being configured.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 6 In FIG. 1, 1 is a base, on which a reinforcing bar set part A, a welding part B, and a feed drive part C are arranged. ing.

As shown in the enlarged view of FIG. 2, the reinforcing bar set part A is
Mainly, a slide electrode stand 3 is slidably guided in the longitudinal direction between two parallel slide guides 2 attached to the base 1, and a main reinforcing movement guide 4 is attached to the slide electrode stand 3. It is constructed by attaching lower electrodes 5 at appropriate intervals.

Hereinafter, the configuration of the reinforcing bar setting section A will be explained in more detail.

As is clear from FIGS. 2 and 4, the slide guide 2 is attached to the base 1 via a stroke bearing 6, an idle pin 7, and the like. The stroke bearing 6 is configured to be able to slide up and down along the id pin 7, and supports the slide guide 2 so that it can move up and down.

Moreover, as is clear from FIG. 5, the slide guide 2
A spring holder 8 is disposed on the outside of the holder. A hole 8a is bored in the spring receiver 8, and a support shaft 9 is inserted through the hole 8a. The support shaft 9 is fixed to the base 1. 1
A compression spring 0 elastically presses the compression spring receiver 8 against a nut 8 screwed onto the upper end of the support shaft 9. Therefore, the slide guide 2 can be elastically pushed downward against the compression spring 10.

A guide roller 11 is disposed inside the slide guide 2, on which the slide electrode stand 3 is placed and slidably guided in its longitudinal direction.

Furthermore, as is clear from FIG. 6, guide rollers 12 are provided on both sides of the slide electrode stand 3, so that the slide is guided along the inner surface of the id 2. .

As described above, the slide electrode stand 3 is in rolling contact with the bottom, and the idle rollers 11 and the idle rollers 12 are disposed on the left and right sides.
This allows it to move in the longitudinal direction while being restricted in the downward and left-right directions, and also allows it to be pushed down elastically. A cooling water circulation vibe 3a is built into the slide electrode stand 3 to prevent overheating due to welding.

As is clear from FIG. 7, the lower electrode 5 is integrally attached to the slide electrode stand 3, and as is clear from FIG. 3, a V-shaped groove 5a is formed on the upper surface thereof. The attachment reinforcement muscle F' can be set.

Furthermore, as is clear from FIG. 8, a main reinforcing movement guide 4 is integrally attached to the slide electrode stand 3 via a connecting rod 13, and a main reinforcing bar F is attached along the inner surface of the main reinforcing movement guide 4. It is now possible to set it up.

14 is an adjustment screw for adjusting the set height position of the main reinforcing bar F. An insulating plate 16 is interposed between the slide electrode stand 3 and the connecting rod 13 to prevent a short circuit of the welding current.

The adjustment screws 15 at both left and right ends in FIGS. 2 and 3 are adjustment screws for regulating the position of the main reinforcing bar F in the longitudinal direction.

Next, the structure of the welded portion B shown in FIG. 1 will be described in detail.

As is clear from FIGS. 1 and 9, the two slide guides 2 described in connection with the reinforcing bar setting section A extend through the welding section B to the feed drive section C side.

A lower electrode holder 17 is disposed between the slide guides 2 in the welding portion B, and upper electrodes 18 are disposed above the holder 17 facing each other.

The upper electrode 18 is lowered toward the lower electrode receiver 17 by a hydraulic cylinder 19.

Further, on both sides of the lower electrode holder 17, first and second pressurizing electrodes 20.21 are arranged facing each other, and are independently inwardly pushed by respective hydraulic cylinders 22 and 23. It is designed to be extruded.

Next, the feed drive section C shown in FIG. 1 will be explained in detail.

The feed drive section C is mainly composed of a hydraulic cylinder 24, and the tip of the cylinder rod 25 is connected to the tip of the slide electrode stand 3. This connecting portion has a locking structure that allows relative movement in the vertical direction so that the cylinder rod 25 is not affected even if the slide electrode stand 3 is pushed down.

In addition, a plurality of glue switches 26 are arranged at predetermined intervals (intervals corresponding to the spacing of the lower electrodes 5) in the hydraulic sill 24 to intermittently stop the shilling rod 25 and stop the reinforcing rod 25. The butt welded portion (lower electrode 5 portion) of the main reinforcing bars F set in the set portion A and the attached reinforcing bars F' is positioned accurately in the welded portion B.

Next, a method for manufacturing reinforcing reinforcing bars using the apparatus of the above embodiment will be explained.

First, as shown by imaginary lines in FIGS. 2, 3, and 8, two main reinforcing bars F are set in parallel along the inner surface of the main reinforcing sieve guide 4.

Next, as shown by phantom lines in FIGS. 2, 3, and 7, the adhesion reinforcing muscles F' are arranged on the lower electrode 5, and the above-mentioned 2
Set both ends to butt between the main reinforcing bars F of the book.

When the setting of the reinforcing bars is completed, the hydraulic cylinder 24 of the feed drive unit C is operated to move the slide electrode stand 3 to the welding part B.
When the adhesion reinforcing muscle F' set at the forefront reaches the position of the welding part B, the limit switch 26 is activated and the feeding operation of the slide electrode stand 3 is stopped.

When the adhesion reinforcing muscle F' is sent to the welding part B, from the state shown in FIG.
is lowered and presses the attachment reinforcing muscle F' from above. Since the slide electrode stand 3 on which the attachment reinforcement muscle F' is set is elastically supported by the compression spring 10, when the attachment reinforcement muscle F' is pressed by the upper electrode 18, as shown in FIG. , the attachment reinforcing muscle F', the lower electrode 5 and the sliding electrode stand 3 are pushed down together, the lower surface of the sliding electrode stand 3 comes into pressure contact with the lower electrode holder 17 and stops, and at the same time the adhesion reinforcing muscle F' It is firmly held between the upper electrode 18 and the lower electrode 5.

Next, the hydraulic cylinder 22 is activated to move the first pressure electrode 20 forward as shown in FIG. A current is applied to butt weld the main reinforcing bars F and the attached reinforcing bars F'.

After the above-mentioned welding is completed, after retracting the first pressurizing electrode 20,
Subsequently, the hydraulic cylinder 23 on the opposite side is operated to advance the second pressurizing electrode 21, pressurizing the main reinforcing bar F from the outside, as shown in FIG. A welding current is applied between them to butt weld the main reinforcing bars F and the attachment reinforcing bars F', and then the second pressurizing electrode 21 is moved back and the upper electrode 18 is also moved up and back, as shown in FIG. Return to the state shown.

When the above-mentioned welding is completed, the hydraulic cylinder 24 is operated again to further advance the slide electrode stand 3, and when the next adhesion reinforcing muscle F' is sent to the position of the welding part B, the second limit switch 26 is activated. work, then stop again and repeat the above welding operation.

Effects of the invention (1) Butt welding is performed by applying welding current while applying pressure to the butt portions of the main reinforcing bars and attached reinforcing bars, so welding is performed reliably and accurately, and spatter and pinholes do not occur. It can be welded firmly without any problems.

(2) While the central adhesion reinforcing bar is firmly gripped with one electrode, the other two electrodes are sequentially pressed against the main reinforcing bars on both sides for butt welding, making it possible to make large-sized power supply equipment There is no need to do this, and it can be manufactured at low cost.

(3) Since the reinforcing bars are set on the sliding electrode stand and sent to the welding area, the setting work can be done easily and quickly.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the reinforcing reinforcing bar manufacturing apparatus of the present invention, Fig. 2 is a plan view of a reinforcing bar setting section, and Fig. 3 is a longitudinal sectional view taken along the line I[[-I]. , Figure 4 is Figure 2 IV-
Figure 5 is a cross-sectional view taken along line IV, Figure 5 is a cross-sectional view taken along line ■-■ in Figure 2, Figure 6 is a cross-sectional view taken along line Vl-VI in Figure 2, and Figure 7 is a cross-sectional view taken along line Vl-VI in Figure 2. Figure 2 is a cross-sectional view taken along line ■-■, Figure 8 is a cross-sectional view taken along line ■-■ in Figure 2, and Figure 9 is #1.
Figures 10 to 13 are explanatory diagrams sequentially explaining the welding work, Figure 14 is a front view of reinforcing bars manufactured by the apparatus of the present invention, and Figure 15 is a conventional arc welding process. It is a figure explaining a state. DESCRIPTION OF SYMBOLS 1... Base, 2... Slide guide, 3... Slide electrode stand, 3a... Cooling water circulation pipe, 4...
Main reinforcing node guide, 5... Lower electrode, 5a... V-shaped groove, 6... Stroke bearing, 7... Guide bin, 8... Spring receiver, 8a... Hole, 9...・Support shaft, 9a... Nut, 10... Compression spring, 11
．． 12...Idler, 13...Connection rod, 14.
15... Adjustment screw, 16... Insulating plate, 17... Lower electrode holder, 18... Upper electrode, 19... Hydraulic cylinder,
20...First pressure electrode, 21...Second pressure electrode, 2
2, 23, 24...Hydraulic cylinder, 25...Cylinder rod, 26...Limit switch, A...Reinforcing bar set part, B...Welding part, C...Feed drive part, F
...Main reinforcing bars, F'...Attachment reinforcing bars. Patent applicant: Tokyu Construction Co., Ltd., Nippon Catenary Construction Co., Ltd., Nippon Welding Machinery Co., Ltd.

Claims (1)

[Claims] A slide guide is installed on the base to extend from the reinforcing bar set part to the welding part, and the slide electrode stand is slidably guided along the slide guide, and two main reinforcing bars are installed on the slide electrode stand. setting means for setting the main reinforcing bars in parallel in the longitudinal direction, and setting a plurality of attached reinforcing bars in a butting state at appropriate intervals in the same plane between the main reinforcing bars; an electrode, a first pressure electrode that presses one of the two main reinforcement bars from the outside, a second pressure electrode that presses the other main reinforcement from the outside, and an upper electrode and each pressure electrode. 1. An apparatus for producing reinforcing reinforcing bars, comprising: a power supply for passing a current between them; and a driving means for intermittently sending the slide electrode stand to a welding part at predetermined intervals.