JPS6231137B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforcing bar cage used for humid pipes, etc., and a method for manufacturing the same.

In large-diameter hume pipes, double cages are generally used to increase the strength of the pipe.

The conventional manufacturing method for this double cage is to manufacture a small-diameter reinforcing bar cage and a large-diameter reinforcing bar cage separately using the usual method, and then combine the two reinforcing bar cages and fix the inner and outer reinforcing bar cages with binding bars or the like. It was used as a double cage.

Therefore, it takes a long time to manufacture each reinforcing bar cage, and furthermore, the work of combining each reinforcing bar cage is a manual process, which causes problems such as requiring a large number of workers.

This invention was made to solve the problem of double cages as described above, and provides a reinforcing bar cage that can be manufactured with one reinforcing bar knitting machine by using vertical bars that are bent in a wave-like manner. The purpose is to provide a method for producing the same.

The reinforcing bar cage of the present invention includes a plurality of vertical reinforcements bent in a wavy manner, an inner spiral reinforcement welded in contact with the outside of the troughs of the plurality of vertical reinforcement groups, and an inner spiral reinforcement welded to the outside of the peaks of the vertical reinforcement group. The present invention is characterized by a reinforcing bar cage consisting of external spiral bars welded together, and a method for manufacturing the same.

An embodiment of the present invention will be described below based on the accompanying drawings.

As shown in FIG. 1, the vertical stripes 1 are bent in a wave-like manner, and although there are four longitudinal strips 1 in the figure, in reality, a larger number of longitudinal strips 1 are arranged in a cylindrical shape.

An inner spiral reinforcement 3 is spirally wound around the outside of the valley part 2 of the plurality of longitudinal reinforcement groups arranged as described above and welded to the valley part 2.

Further, an outer spiral muscle 5 is spirally wound around the outside of the peak portion 4 and welded to the peak portion 4 to form a cage-like structure.

In addition, as for the manufacturing method, while bending the straight vertical reinforcement 1, the inner and outer spiral reinforcements 4 and 5 are simultaneously wound around the troughs 2 and peaks 4 of the vertical reinforcement 1, and a welding machine for the inner spiral reinforcement 2 is used. Welding can be performed efficiently by simultaneously welding with a welding machine for the outer spiral reinforcement 5.

The present invention has the following effects due to the above configuration and method.

(1) By bending the longitudinal bars in a wave pattern, each single longitudinal bar can be welded to both the inner spiral muscle and the outer spiral muscle,
A reinforced steel cage with greater strength can be obtained using less material than the conventional double cage.

(2) Since it is possible to bend a plurality of vertical bars in a wave-like manner and simultaneously wrap and weld the inner spiral bars and outer spiral bars at the same time, it has the advantage of being able to be manufactured efficiently at the same speed as conventional single-layer cages.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway vertical sectional side view of the reinforcing bar cage of the present invention, and FIG. 2 is a cross sectional view of the same. 1... Longitudinal muscle, 2... Valley, 3... Medial spiral muscle,
4... Mountain part, 5... Lateral spiral muscle.

Claims (1)

[Claims] 1. A plurality of vertical reinforcements bent in a wavy manner, an inner spiral reinforcement welded to the outside of the troughs of the plurality of vertical reinforcement groups, and an inner spiral reinforcement welded to the outside of the crests of the vertical reinforcement groups. A reinforcing bar cage consisting of external spiral bars welded in contact. 2. Bending multiple longitudinal muscles arranged in a cylindrical shape in a wave pattern, wrapping the inner spiral muscles and outer spiral muscles around the troughs and crests of these multiple longitudinal muscle groups, and bending the intersection points of each spiral muscle and longitudinal muscle. A method for manufacturing reinforcing bar cages, which is characterized by welding.