JP2779790B2 - Manufacturing method of X-shaped assembled rebar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an X-shaped rebar.

[0002]

2. Description of the Related Art An X-shaped assembled reinforcing bar comprising an inner reinforcing bar having both ends fixed to the inside of a pair of ring plates and an outer reinforcing bar having both ends fixed to the outside of the ring plate is a ring plate. Compared with the X-shaped rebar in which the rebar is fixed only on the outside of the steel bar, there is an advantage that the abutment (interference) between the rebars can be prevented even when the number of rebars is increased and a multi-directional X-shaped rebar is configured. On the other hand, the production was very troublesome because the reinforcing steel was fixed to the inside and outside of the ring plate, and the production by hand was forced. That is, a predetermined number of inner reinforcing bars are inserted into a pair of ring plates, and both ends thereof are fixed to the inside of the ring plate by welding or the like,
Thereafter, a complicated manufacturing procedure of fixing both ends of the outer reinforcing bar to the outside of the ring plate by welding or the like,
It was difficult to automate production. So the book
The inventor holds the small diameter part that holds the inner reinforcing bar and the outer reinforcing bar
-Shaped set using a stepped drum consisting of a large diameter part
A method for manufacturing a standing rebar has been developed and disclosed in Japanese Patent Application Laid-Open No. Hei.
As already proposed. This manufacturing method is based on
Same and relatively movable in the direction of the axis of rotation
Each of the pair of rotating bodies is separated from the small diameter part holding the inner
It is composed of a stepped drum consisting of a large diameter
Around the small diameter part of the stepped drum
The required number of recesses into which the ends fit are formed at regular intervals
However, the end of the outer reinforcing bar fits around the outer periphery of the large diameter portion.
Number of recesses are formed at regular intervals, and
Concave part (this is the concave part of the small diameter part
When fitting the end, make sure that the large diameter part does not interfere
Recess. ), With steps on both sides
At both ends of the required number of inner rebars for the small diameter part of the drum
It is held in a state fitted in the recess, and in this state,
Fix a pair of ring plates to the outside of the side reinforcing
In addition, the same number of
Hold both ends of the side reinforcing bars in the recesses.
In this state, both ends of the outer rebar are ring-played.
And then expand the drum spacing,
For removing both ends of the X-shaped assembling rebar from the stepped drum
Is the law. Therefore, according to this manufacturing method, outside the small diameter portion
To hold the inner rebar on the side, a ring plate on the outer side
Secure the outer reinforcement to the outside of the large diameter
Always from outside, like fixing outside the rate
Work, inside the pair of ring plates inside rebar
Since there is no troublesome process of inserting both ends of the
The assembled rebar can be easily manufactured. However
In this manufacturing method, the rotary member, which is a component of the manufacturing apparatus,
The number of recesses corresponding to the number of reinforcing bars is formed on the outer circumference as a body.
Using a stepped drum
X-shaped assembled rebar with 6 rebars and 6 outer rebars, and inner
Manufactures X-shaped assembled rebar with eight rebars and eight outer rebars
When changing the number of rebars to be assembled as in the case of
Replace with a stepped drum with a different number of recesses and pitch.
And cost was very high.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and an object of the present invention is to easily provide an X-shaped assembled rebar in which rebars are fixed inside and outside a ring plate. Another object of the present invention is to provide a manufacturing method which can be manufactured at low cost .

[0004]

The technical measures taken by the present invention to solve the above-mentioned problems are as follows.
That is, in the method of manufacturing an X-shaped assembled reinforcing bar according to the present invention, an X-shaped reinforcing bar is constituted by an inner reinforcing bar having both ends fixed inside a pair of ring plates and an outer reinforcing bar having both ends fixed outside the ring plate. In manufacturing the X-shaped assembled reinforcing bar, a pair of rotating bodies having the same rotation axis and being configured to be relatively movable in the direction of the rotation axis have no irregularities on the outer circumference.
Support the auxiliary ring in a form, temporarily fix both ends of the inner reinforcing bar outside the auxiliary ring, and then fix the ring plate to the outside of the inner reinforcing bar group, and fix both ends of the outer reinforcing bar outside the ring plate. It is characterized in that the side is fixed.

[0005]

According to the above construction, the inner reinforcing bar is temporarily fixed to the outside of the auxiliary ring, the ring plate is fixed to the outer side of the auxiliary ring, and the outer reinforcing bar is fixed to the outside of the ring plate. Since the operation is performed from the outside and there is no troublesome process of inserting both ends of the inner reinforcing bar inside the pair of ring plates, the X-shaped assembled reinforcing bar can be easily manufactured. The auxiliary ring is a component of the manufacturing equipment.
Rotating body (with the same rotation axis and relative to the rotation axis direction)
Manufactured separately from a pair of rotators that are configured to be movable
Is used by supporting it on a rotating body.
Also have a circular shape with no irregularities on the outer periphery. Therefore, auxiliary
The number of rings and rotating bodies depends on the number of rebars to be assembled.
It can be used easily and can be used even if the number of rebars to be assembled is changed
There is no need to replace rings and rotating bodies, and X-shaped
Can be manufactured at low cost.

[0006]

FIG. 1 shows an embodiment of the present invention. In this embodiment, an X-shaped reinforcing bar is constituted by an inner reinforcing bar 2 having both ends fixed inside a pair of ring plates 1, 1 and an outer reinforcing bar 3 having both ends fixed outside the ring plates 1, 1. Further, the band reinforcing bar 4, the parallel main bar 5 and the band reinforcing bar 6 of the parallel main bar 5.
The method is characterized in that the X-shaped assembled reinforcing bar A for a column having the reinforcing bar is manufactured by a method including the following steps.

[0007] Step of cutting the reinforcing bar [0007] A linear reinforcing bar is cut to a predetermined length. Step of Rebar Bending The rebar obtained in the previous step is bent into a state in which both ends are parallel to each other and the middle part is an oblique line inclined at a predetermined angle with respect to both ends, and the required number of inner rebars 2 and The outer reinforcing bar 3 is manufactured.

Step of Temporarily Fixing Inner Reinforcing Bar Each of cylindrical auxiliary rings 7, 7 is attached to a pair of rotating bodies (not shown) having the same rotation axis P and being relatively movable in the rotation axis direction P. The auxiliary ring 7 is supplied with the inner rebar 2, and both ends thereof are temporarily fixed to the outside of the auxiliary ring 7. Each time one inner reinforcing bar 2 is temporarily fixed, the auxiliary rings 7, 7 are rotated by a predetermined angle in the same direction via the rotating body. The material of the auxiliary rings 7, 7 may be a steel plate or a synthetic resin. The means for temporary fixing can be appropriately selected according to the material of the auxiliary rings 7, 7 such as spot welding and bonding with an adhesive.

Ring Plate Winding Step The ring plates 1, 1 are fitted over the outside of the group of inner reinforcing bars 2 temporarily fixed to the outside of the auxiliary rings 7, 7. As the ring plates 1 and 1, a steel plate formed in a ring shape in advance may be used, but a steel plate with a part cut in a circumferential direction (substantially C-shaped) so that the inner diameter can be enlarged or reduced is used. Then, in a state where the diameter is expanded and deformed against the elastic restoring force, the outer reinforcing member is fitted over the outer side of the inner rebar 2 group, or a flat steel plate is wound around the outer side of the inner rebar 2 and plastically deformed into a ring shape. This is desirable for facilitating the cladding operation.

Inner reinforcing bar welding step The contact portion between the inner reinforcing bar 2 and the ring plates 1 and 1 is welded by manual welding or a welding robot. Outer reinforcing bar welding step The outer reinforcing bar 3 is supplied to the ring plates 1 and 1, and both ends thereof are welded to the outside of the ring plates 1 and 1 by hand welding or a welding robot. Each time the outer reinforcing bar 3 is welded to one of the ring plates 1, 1 in the same manner as in the case where the inner reinforcing bar 2 is temporarily fixed to the auxiliary rings 7, 7,
It is rotated by a predetermined angle in the same direction via the rotator.

Step of Winding Up Reinforcing Strip Reinforcing strip 4 is spirally wound around outer group 3 of rebars and fixed. As a fixing method, in addition to the fixing by welding as in the illustrated process, there is a binding and fixing by a number line, a fixing by friction between the reinforcing bar 3 and the band reinforcing bar 4, and the like. Parallel main bar welding process The parallel main bar 5 is welded to the outside of the ring plates 1 and 1. Steps of Welding and Reinforcing Band Reinforcing band Reinforcing bar 6 is spirally wound around the group of parallel main reinforcing bars 5 and fixed by welding. Thereafter, the rotating body is moved away from each other to remove the X-shaped assembled reinforcing bar from the rotating body, and the auxiliary rings 7, 7 are removed to obtain a desired X-shaped assembled reinforcing bar A.

FIGS. 2 and 3 show another embodiment of the present invention.
This embodiment is characterized in that a ring-shaped rebar is used as the auxiliary rings 7, 7. That is, first,
As shown in FIGS. 2A and 3, a pair of rotating bodies 8 having the same rotation axis P and configured to be relatively movable in the rotation axis direction P are respectively provided with auxiliary rings 7, 7 made of reinforcing steel. To support. Specifically, each rotating body 8 is provided with a radial arm 8a which can be extended and contracted, and the arm 8a is extended so that the auxiliary rings 7, 7 are supported at the ends thereof.

In this state, as shown in FIG. 2B and FIG. 3, the inner rebar 2 bent in advance into a predetermined shape is supplied to the auxiliary rings 7, 7, and the auxiliary rings 7, 7 are supplied.
The both ends of the inner reinforcing bar 2 are temporarily fixed to the outside of the base 7 by means such as spot welding or bonding. Every time one inner reinforcing bar 2 is temporarily fixed, the auxiliary rings 7, 7 are rotated by a predetermined angle in the same direction via the rotating body 8 in the same manner as in the previous embodiment.

Thereafter, as shown in FIG. 2 (c) and FIG. 3, the ring plates 1, 1 are fitted over the outside of the group of inner rebars 2 temporarily fixed to the outside of the auxiliary rings 7, 7 and The contact part is fixed by manual welding or welding by a welding robot. As the ring plates 1 and 1, a steel plate having a shape (substantially C-shape) partially cut in the circumferential direction is used so that the inner diameter can be enlarged or reduced. It is desirable to fit over the outer side of the inner reinforcing bar 2 group or to wind a flat belt-shaped steel plate around the outer side of the inner reinforcing bar group 2 to be plastically deformed into a ring shape in order to facilitate the closing operation. This is the same as the previous embodiment.

Next, as shown in FIG. 2D and FIG. 3, an outer reinforcing bar 3 previously bent into a predetermined shape is supplied to the ring plates 1 and 1, and both ends of the outer reinforcing bar 3 are ring plates. Welding to the outside of 1, 1 by hand welding or welding robot. Every time one outer reinforcing bar 3 is welded, the ring plates 1 and 1 are rotated by a predetermined angle in the same direction as in the previous embodiment.

Thereafter, as shown by the phantom line in FIG. 2D, the arm 8a is reduced, and the rotating bodies 8, 8 are moved away from each other so that the X-shaped assembled reinforcing bar is moved away from the rotating body. Remove and attach auxiliary rings 7, 7 as shown in FIG.
The obtained X-shaped rebar B is obtained.

According to this embodiment, since the auxiliary rings 7, 7 for temporarily fixing the inner reinforcing bar 2 are made of reinforcing steel, even if the auxiliary rings 7, 7 are embedded in concrete such as a pillar, the concrete is not damaged. Filling failure and auxiliary ring 7,7
Separation of the concrete inside and outside does not occur, and the auxiliary rings 7, 7 are members for temporarily fixing the inner reinforcing bar 2 and are originally irrelevant to the strength of the structure, so that even if the strength of the temporary fixing is weak, It doesn't matter at all. Therefore, X-shaped assembled reinforcing bar B
After the manufacture, the auxiliary rings 7, 7 do not need to be removed, thereby improving the manufacturing efficiency.

[0018]

According to the present invention, the inner reinforcing bar is temporarily fixed to the outside of the auxiliary ring, the ring plate is fixed to the outer side of the auxiliary ring, and the outer reinforcing bar is fixed to the outside of the ring plate. Since the work is always done from the outside and there is no troublesome process of inserting both ends of the inner reinforcing bar inside the pair of ring plates, the X-shaped assembled reinforcing bar can be easily manufactured, and in order to achieve automation of manufacturing. Very effective. In particular, according to the invention, the auxiliary ring is provided
A rotating body (a rotating shaft having the same rotating shaft and
A pair of rotating bodies configured to be relatively movable in the core direction) and
Is manufactured separately and used by being supported by a rotating body.
And it has a circular shape with no irregularities on the outer periphery.
You. Therefore, the auxiliary ring and the rotating body are iron
Reinforcement books that can be used and assembled regardless of the number of bars
It is not necessary to replace the auxiliary ring or rotating body even if the number is changed.
In addition, there is an effect that the X-shaped assembled rebar can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method of manufacturing an X-shaped assembled reinforcing bar according to an embodiment of the present invention.

FIG. 2 is an illustration of a method of manufacturing an X-shaped assembled reinforcing bar according to another embodiment of the present invention.

FIG. 3 is a perspective view of a main part.

[Explanation of symbols]

1 ... Ring plate, 2 ... Inner rebar, 3 ... Outer rebar, 7
... Auxiliary ring, 8 ... Rotating body.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04C 5/06

Claims (1)

(57) [Claims] In manufacturing an X-shaped assembled reinforcing bar, an X-shaped reinforcing bar is formed by an inner reinforcing bar having both ends fixed inside a pair of ring plates and an outer reinforcing bar having both ends fixed outside the ring plate. , A pair of rotating bodies having the same rotation axis and being relatively movable in the direction of the rotation axis.
An auxiliary ring having a circular shape without irregularities on the outer periphery is supported, and both ends of the inner reinforcing bar are temporarily fixed to the outside of the auxiliary ring, and thereafter, a ring plate is fixed to the outside of the inner reinforcing bar group,
A method for manufacturing an X-shaped assembled reinforcing bar, comprising fixing both ends of an outer reinforcing bar to the outside of the ring plate.