JPS61150724A - Reinforcing bar bender - Google Patents

Abstract

PURPOSE:To increase work efficiency without necessity of replacing a reinforcing bar in case of bending the back and forth both end parts of the reinforcing bar by arranging a reaction receiver at the upstream side and downstream side of a bending die thereagainst. CONSTITUTION:A rotary roller 13 lifts the main body 20 of a bender so as to coincide with the line of transfer conveyor 21 and regular size conveyor 22 and simultaneously pushes up selected stopper 23a. The reinforcing bar is advanced upto the stopper 23a, the main body 20 of the bender is pushed down until a bending die 12 comes into contact with the reinforcing bar 5 and the reinforcing bar 5 is supported by the head part 14a of a reaction receiver 14. The engaging lever 16a of a set cylinder 16 comes under a guide rod 15 to support. The reinforcing bar 5 is bent in L shape with rotating the bender main body 20. The bender main body 20 is again lifted by returning the bender main body 20, reaction receiver 14 and set cylinder 16 to the original state. A stopper 23f is raised and the reinforcing bar is advanced. The bender main body 20 is descended until a bending die 12 touches the reinforcing bar 5, which is supported by the head part 17a of a reaction receiver 17. the reinforcing bar 5 is bent in L shape with the rotation of the bender main body 20.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a reinforcing bar bending machine.

[Prior art]

The conventional reinforcing bar bending machine 1 has a bending die 2 as shown in FIG.
A reaction force receiver 4 is provided only on the upstream side of the reinforcing bar 5, and after pressing the reinforcing bar 5 with the reaction force receiver 4, the rotating roller 3 is rotated in the direction of arrow A around the bending die 2, so that the reinforcing bar 5 is The tip was bent into an L shape as shown by the solid line.

Therefore, when bending the front and back ends of the reinforcing bar 5 into an L shape, as described above, after bending the tip part into an L shape, the reinforcing bar 5
It was necessary to take out the reinforcing bar 5 from the reinforcing bar bending machine 1, set the rear end part of the reinforcing bar 5 again in the reinforcing bar bending machine 1, and perform the same bending process as the tip part.

Therefore, conventionally, when bending the front and rear end portions of the reinforcing bar 5 into an L shape, it required a large number of man-hours and was extremely inefficient.

[Purpose of the invention]

The object of the present invention is to improve the work efficiency when bending both the front and rear end portions of a reinforcing bar into an L shape.

[Structure of the invention]

The reinforcing bar bending machine of the present invention achieves the above objects,
It is characterized in that reaction force receivers are arranged on the upstream and downstream sides of the bending die.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

As shown in FIG. 1, the reinforcing bar bending machine 10 has a reaction force receiver 14 disposed on the upstream side of the bending die 12, and a reaction force receiver 17 also disposed on the downstream side.

The head 14a of the reaction force receiver 14 is attached to the guide rod 15a, and the guide rod 15a is attached to the guide column 15.
It has a structure that allows it to be lifted up and down on the inside surface. Further, the head 17a of the reaction force receiver 17 is attached to a guide rod 18a, and the guide rod 18a has a structure that allows it to move up and down on the inner surface of the guide column 18.

The heads 14a and 17a of these reaction force receivers are moved up and down by air cylinders (not shown), respectively.

A set cylinder 16 is arranged horizontally right next to the guide column 15, and when the head 14a of the reaction force receiver supports the reinforcing bar 5, the set cylinder 16 is placed under the guide rod 15a.
The engagement rod 16a of No. 6 is inserted therein.

Similarly, the set cylinder 19 is placed horizontally right next to the guide column 18, and the head 17a of the reaction force receiver is attached to the reinforcing bar 5.
When the set cylinder 19 is supported, the engaging rod 19a of the set cylinder 19 fits under the guide rod 18a.

The bender main body 20 includes a rotating roller 1 in addition to the bending mold 12.
3, and is raised and lowered by a lifting device (not shown).

On the other hand, a conveyor 21 is provided upstream of the reinforcing bar bending machine 10, and a sizing conveyor 22 is provided downstream of the reinforcing bar bending machine 10.
are placed. This sizing conveyor 22 is provided with a large number of stoppers 23 at regular intervals. And stopper 2
To adjust the length of fractions smaller than the interval 3, use the sizing conveyor 2.
This is done by moving 2 itself.

Next, the bending process of reinforcing bars by the above-mentioned reinforcing bar bending talO will be explained.

(Al First, as shown in Figure 2, the rotating roller 13
lifts the bender main body 20 so that it coincides with the conveyance position of the conveyor 21 and the sizing conveyor 22, and at the same time pushes up the selected stopper 23a.

(b) Next, as shown in FIG. 2, the reinforcing bar 5 is advanced until it hits the stopper 23a.

(C) Next, as shown in FIG. 3, push down the bender main body 20 until the bending die 12 contacts the reinforcing bar 5, or until the reinforcing bar 5 and the bending die 12 face each other with a minute interval, and The reinforcing bar 5 is supported by the head 14a of the force receiver 14.

When the head 14a of the reaction force receiver 14 supports the reinforcing bar 5, the engagement rod 16a of the set cylinder 16 enters under the guide rod 15a and supports the guide rod 15a.

(d) Next, as shown in FIG.
When the reinforcing bar 5 is rotated clockwise by a predetermined angle, the reinforcing bar 5 is bent into an L shape as shown by the solid line.

(el) Next, after returning the bender main body 20, reaction force receiver 14, and set cylinder 16 to their original states, the bender main body 20 is lifted again.

(f) Next, as shown in FIG.
Push up the reinforcing bar 5 until it hits this stopper 23f.
advance.

(g) Next, as shown in FIG. 5, the bender main body 20 is pushed down until the bending die 12 contacts the reinforcing bar 5, and the reinforcing bar 5 is supported by the head 17a of the reaction force receiver 17.

When the head 17a of the reaction force receiver 17 supports the reinforcing bar 5, a set cylinder 19 is placed under the guide rod 18a.
The engaging rod 19a enters and supports the guide rod 18a.

(h) When the pen body 20 is rotated counterclockwise by a predetermined angle as shown in FIG. 5, the reinforcing bar 5 is bent into an L shape as shown by the solid line.

(1) Finally, the bender body 20, reaction force receiver 17, and set cylinder 19 are returned to their original states.

The above procedure is repeated to sequentially bend the reinforcing bars 5.

[Effects of the Invention] As described above, the present invention arranges reaction force receivers on the upstream and downstream sides of a bending die, and uses the reaction force receivers on the downstream side when bending the front end portion of a reinforcing bar. 1. When bending the rear end of the reinforcing bar, the reaction force receiver on the upstream side is used. There is no need to replace the reinforcing bars, and the work efficiency when bending both the front and rear ends of the reinforcing bars into an L shape is significantly improved compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a front view of a reinforcing bar bending machine according to the present invention, and FIG.
FIG. 5 is an explanatory diagram of the operation, and FIG. 6 is a front view of a conventional reinforcing bar bending machine. 12...Bending mold, 14.17...Reaction force receiver.

Claims (1)

[Claims] A reinforcing bar bending machine characterized in that reaction force receivers are arranged on the upstream and downstream sides of the bending die.