JPH05295855A - Manufacture of x-shaped built-up reinforcement - Google Patents

Abstract

PURPOSE:To easily manufacture an X-shaped built-up reinforcement which is made up by fixing the reinforcements to the inside and the outside of ring plates. CONSTITUTION:In manufacture of an X-shaped built-up reinforcement, of which X-shaped bar arrangement is made up of internal reinforcements 2 that are fixed at their both ends to the inside of a pair of ring plates 1 and 1 and external reinforcements 3 that are fixed at their both ends to the outside of the ring plates 1 and 1, auxiliary rings 7 and 7 are supported with a pair of rotators 8 and 8 that are installed coaxially with the rotational axis P and are capable of making relative movement in the direction of the rotational axis P. Then, the internal reinforcements 2 are fixed at their both ends to the outside of the auxiliary rings 7 and 7 and after that, the ring plates 1 and 1 are fixed to the outside of a batch of the internal reinforcements 2, and then the external reinforcements 3 are fixed at their both ends to the outside of the ring plates 1 and 1.

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 assembled rebar.

[0002]

2. Description of the Related Art An X-shaped assembled rebar having an X-shaped rebar composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate is a ring plate. Compared with the X-shaped assembly rebars that fix the rebars only on the outside of the, there is an advantage that the rebars can be prevented from abutting (interfering) even when the number of rebars is increased to form a multi-directional X-shaped rebar. On the other hand, since the reinforcing bars are fixed inside and outside the ring plate, the manufacturing is very troublesome, and the manufacturing is forced to be done manually. That is, a predetermined number of inner reinforcing bars are inserted into a pair of ring plates, and both ends of the reinforcing bars are fixed to the inside of the ring plates by welding or the like.
After that, it becomes a complicated manufacturing procedure such as 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 the manufacturing.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to easily form an X-shaped assembly rebar in which rebars are fixed inside and outside a ring plate. It is to provide a manufacturing method that can be manufactured.

[0004]

[Means for Solving the Problems] The technical means taken by the present invention to solve the above problems are as follows.
That is, in the method for manufacturing an X-shaped assembled rebar according to the present invention, an X-shaped rebar is composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate. In manufacturing the X-shaped assembled rebar, a pair of rotating bodies having the same rotating shaft center and configured to be relatively movable in the rotating shaft core direction respectively support the auxiliary rings, and the inner reinforcing bars are provided outside the auxiliary rings. It is characterized in that both ends are temporarily fixed, then the ring plates are fixed to the outside of the inner reinforcing bar group, and both ends of the outer reinforcing bars are fixed to the outside of the ring plate.

[0005]

According to the above construction, the inner rebar is temporarily fixed to the outer side of the auxiliary ring, the ring plate is fitted and fixed to the outer side of the auxiliary ring, and the outer rebar is fixed to the outer side of the ring plate. Since the work is performed from the outside and there is no troublesome step 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.

[0006]

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

Reinforcing Bar Cutting Step A linear reinforcing bar is cut into a predetermined length. Reinforcing bar bending process The reinforcing bar obtained in the previous process is bent into a state in which both ends are parallel to each other and the middle part is an oblique bar inclined at a predetermined angle with respect to both ends, and the required number of inner reinforcing bars 2 and The outer rebar 3 is manufactured.

Step of temporarily fixing inner rebars: Cylindrical auxiliary rings 7 and 7 are respectively provided on a pair of rotating bodies (not shown) having the same rotating shaft core P and being relatively movable in the rotating shaft core direction P. The inner reinforcing bars 2 are supported and supplied to the auxiliary rings 7 and 7, and both ends thereof are temporarily fixed to the outside of the auxiliary rings 7 and 7. Then, 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 made of steel plate or 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 or adhesion with an adhesive.

Ring Plate Winding Step The ring plates 1, 1 are fitted on the outer side of the inner reinforcing bar 2 group temporarily fixed on the outer sides of the auxiliary rings 7, 7. The ring plates 1 and 1 may be steel plates formed in a ring shape in advance, but steel plates partially cut in the circumferential direction (substantially C-shaped) are used so that the inner diameter can be enlarged or reduced. Then, it is fitted onto the outside of the inner rebar 2 group in a state of being expanded and deformed against the elastic restoring force, or a flat strip-shaped steel plate is wrapped around the outer side of the inner rebar 2 and plastically deformed into a ring shape. This is desirable for facilitating the fitting operation.

Welding process for inner reinforcing bars The inner reinforcing bars 2 and the contact portions of the ring plates 1, 1 are welded by manual welding or a welding robot. Step of Welding Outer Reinforcing Bars Outer reinforcing bars 3 are supplied to the ring plates 1, 1 and both ends thereof are welded to the outside of the ring plates 1, 1 by manual welding or by a welding robot. The ring plates 1 and 1 are welded each time one outer reinforcing bar 3 is welded, as in the case where the inner reinforcing bar 2 is temporarily fixed to the auxiliary rings 7 and 7.
The rotating body is rotated through a predetermined angle in the same direction.

Step of winding up the reinforcing bar 4. The reinforcing bar 4 is spirally wound around and fixed to the outer reinforcing bar 3 group. As a fixing method, there are fixing by welding as in the illustrated process, binding fixing by a wire, fixing by friction between the reinforcing bars 3 and the band reinforcing bars 4, and the like. Parallel main bar welding step The parallel main bar 5 is welded to the outside of the ring plates 1 and 1. The process of winding and wrapping the reinforcing steel bar around the group of 5 parallel main bars, the reinforcing steel bar 6 is spirally wound and fixed by welding. After that, the rotating bodies are moved away from each other to remove the X-shaped assembled reinforcing bar from the rotating body, and the auxiliary rings 7 and 7 are removed to obtain a desired X-shaped assembled reinforcing bar A.

2 and 3 show another embodiment of the present invention.
This embodiment is characterized in that a ring-shaped reinforcing bar is used as the auxiliary rings 7, 7. That is, first,
As shown in (a) of FIG. 2 and FIG. 3, the auxiliary rings 7 and 7 made of rebar are respectively provided to the pair of rotating bodies 8 which have the same rotation axis P and are relatively movable in the rotation axis direction P. Support. Specifically, each rotating body 8 is provided with an expandable and contractible radial arm 8a, and the arm 8a is extended to support the auxiliary rings 7, 7 at their tips.

In this state, as shown in FIG. 2B and FIG. 3, the inner reinforcing bar 2 bent in advance into a predetermined shape is supplied to the auxiliary rings 7, 7 and the auxiliary rings 7,
Both ends of the inner reinforcing bar 2 are temporarily fixed to the outer side of 7 by means such as spot welding or adhesion. It is the same as in the previous embodiment that the auxiliary rings 7, 7 are rotated in the same direction by a predetermined angle via the rotating body 8 every time one inner reinforcing bar 2 is temporarily fixed.

Thereafter, as shown in (c) of FIG. 2 and FIG. 3, ring plates 1, 1 are fitted onto the outer side of the inner reinforcing bar 2 group temporarily fixed on the outer sides of the auxiliary rings 7, 7, and these are fitted. Fix the abutting part by manual welding or by welding with a welding robot. As the ring plates 1 and 1, steel plates having a shape in which a part in the circumferential direction is cut so that the inner diameter can be expanded or contracted (substantially C-shaped) are used, and are expanded and deformed against the elastic restoring force. In order to facilitate the fitting operation, it is preferable to fit the inside of the inner reinforcing bar 2 outside or to wrap a flat strip-shaped steel plate to the outside of the inside reinforcing bar 2 for plastic deformation. This is the same as the previous embodiment.

Next, as shown in (d) of FIG. 2 and FIG. 3, the outer rebars 3 preliminarily bent into a predetermined shape are supplied to the ring plates 1 and 1, and both end sides thereof are ring plates. Weld to the outside of 1, 1 by hand welding or by a welding robot. The ring plates 1 and 1 are rotated by a predetermined angle in the same direction every time one outer reinforcing bar 3 is welded, as in the previous embodiment.

Thereafter, as shown by the phantom line in FIG. 2D, the arm 8a is contracted, and the rotating bodies 8 and 8 are moved away from each other so that the X-shaped assembly rebar is separated from the rotating body. Then, the auxiliary rings 7 and 7 are removed and the X-shaped rebar B as shown in FIG. 3 is obtained.

According to this embodiment, since the auxiliary rings 7 and 7 for temporarily fixing the inner reinforcing bar 2 are made of rebar, even if the auxiliary rings 7 and 7 are embedded in concrete such as columns, concrete Poor filling and auxiliary rings 7,7
Concrete separation does not occur inside and outside, and the auxiliary rings 7 and 7 are members for temporarily fixing the inner reinforcing bar 2, and since they are originally unrelated to the proof stress of the structure, even if the temporary fixing strength is weak. It doesn't matter at all. Therefore, X-shaped assembly rebar B
After the manufacturing, the auxiliary rings 7 and 7 do not need to be removed, which can improve the manufacturing efficiency.

[0018]

According to the present invention, the inner reinforcing bar is temporarily fixed to the outer side of the auxiliary ring, the ring plate is fitted and fixed to the outer side of the auxiliary ring, and the outer reinforcing bar is fixed to the outer side of the ring plate. Since the work is always performed from the outside and there is no troublesome process of inserting both end sides of the inner reinforcing bar inside the pair of ring plates, the X-shaped assembly reinforcing bar can be easily manufactured, and the manufacturing is automated. It is very effective.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for manufacturing an X-shaped assembled rebar showing an embodiment of the present invention.

FIG. 2 is an explanatory view of a method of manufacturing an X-shaped assembled rebar showing 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.

Claims (1)

[Claims] 1. When manufacturing an X-shaped assembly rebar having an X-shaped rebar composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate. , A pair of rotating bodies having the same rotating shaft core and configured to be relatively movable in the rotating shaft core direction respectively support the auxiliary rings, and temporarily fix both end sides of the inner reinforcing bar to the outside of the auxiliary rings. A method for manufacturing an X-shaped assembled reinforcing bar, comprising fixing a ring plate to the outside of the inner reinforcing bar group, and fixing both ends of the outer reinforcing bar to the outside of the ring plate.