JP2977178B2 - Rebar binding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rebar tying device for mechanically tying rebars after arranging them in a reinforced construction using tying wires.

[0002]

2. Description of the Related Art The manual bundling of reinforcing bars requires a great deal of labor and time, and also requires skilled and specialized workers. In addition, especially for a large-diameter rebar, the binding wire also has a large diameter, and the binding by manual labor becomes heavy work, and the work efficiency is poor.

On the other hand, as a mechanical binding device, for example, the devices disclosed in Japanese Utility Model Publication No. 4-48282 and Japanese Patent Publication No. 4-77103 are used to process a binding material into a predetermined length and shape in advance. It is time-consuming, and if the diameter of the reinforcing bars to be tied is different, use a tying material with a length and shape corresponding to the reinforcing bar diameter each time, or use a tie longer than necessary for small-diameter reinforcing bars. There was a problem such as using a material.

[0004] Further, the above-described apparatus and Japanese Utility Model Laid-Open Publication No. 1-1770.
Also in the device disclosed in Japanese Patent Publication No. 33, there are problems such as that the ends of the binding wires are twisted too much to cause breakage, and that a sufficient rebar tightening force cannot be obtained.

Japanese Patent Laid-Open Publication No. Hei 6-115509 discloses a technique for twisting two U-shaped binding wires. However, in the known technique, since the binding wire is fed to form a U-shape, the feeding is not performed smoothly when the binding wire is thick.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been made to free a worker from heavy work.
In addition to improving work efficiency, a U-shaped binding wire can be easily created, and the same binding wire can be used for rebars with different diameters. It is intended to provide.

[0007]

According to the present invention, a binding wire drum for storing a binding wire and a binding wire from the binding wire drum are bent into a U-shape to hold an end portion and cut the middle. Wire gripping / cutting device, a guide arm pivotally attached to an elevating cylinder, pulling a U-shaped binding wire around a rebar and pulling it up, and hooking the looped U-shaped binding wire loop And a binding lever for twisting and binding.

[0008]

In the rebar tying device constructed as described above, the U-shaped portion of the binding wire is wrapped around the guide arm, wrapped around the rebar and pulled up, and the loop portion of the pulled-up U-shaped tying wire is bound by the binding lever. It is hooked and twisted to bind the rebar, and the binding wire is released and cut by the binding wire gripping / cutting device.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the apparatus of the present invention includes a binding wire 2
, A binding / cutting device 10 that bends a binding wire 2 from the drum 1 into a U-shape to hold an end and cut the middle, and a reinforcing wire 3 for the U-shaped binding wire 2. The guide arm 30 is lifted around the guide arm 30, the lifting cylinder 32 having the guide arm 30 pivotally connected thereto, and the binding arm 40 for hooking and twisting and binding the raised binding wire 2. , Mounted on a frame (not shown).

The drum 1 is a known one and has a binding wire 2 stored therein.

Referring also to FIGS. 2 and 3, the gripping / cutting device 10 includes a fixed disk cam 11 and a cam 1.
The yoke 13 is constituted by a yoke 13 rotated by a motor 12, and a gripping portion 14 and a cutting portion 19 provided at both ends of the yoke 13.

The grip portion 14 is provided with a locking portion 15 formed on the yoke 13 side and a movable portion 16 provided to face the locking portion 15.
7 and urged toward the cam 11 via a spring 18. Reference numerals 15a and 16a in the figure denote teeth for securely holding and fixing the binding wire 2.

The cutting section 19 is provided with a fixed blade 20 and a movable blade 21 similarly to the holding section 14. When the movable portion 16 and the movable blade 21 are lifted by the cam portion 11a of the disk cam 11, the movable portion 16 and the movable blade 21 respectively clamp and fix the binding wire 2 and cut the binding wire 2.
a is formed in a substantially semicircular portion of the disc cam 11.

The elevating cylinder 32 is composed of, for example, an air cylinder.
A guide arm 30 is pivotally mounted.

Referring also to FIG. 4, the guide arm 30 is formed in a horizontal U-shape, and is rotated by means (not shown). A hook portion 31 having a yoke shape and a notched lower corner is formed at the distal end portion.

The binding arm 40 has a horizontal arm 4
1 and a drive section 42 that bends in a U-shape from the upper end of the arm section 41. The driving section 42 is fixed to an output shaft of a turning motor 43, and the turning motor 43 is supported by a slider 44 so as to be able to move up and down. The slider 44 is slidably supported by a horizontal slider table 45.

Next, the mode of binding will be described.

The end of the binding wire 2 from the drum 1 is previously gripped by the gripper 14 of the gripping / cutting device 10. Then, while holding this end, the yoke 13 is rotated about 180 degrees in the direction of the arrow, and the binding wire 2 is
It hangs in a U-shape on the hook portion 31 of 0 and stops. Then, the middle of the binding wire 2 is inserted into the cutting portion 19 (FIG. 1).

Next, the elevating cylinder 32 is extended to lower the guide arm 30, and the guide arm 30 is rotated clockwise by 90 degrees, and the binding wire 2 is wound around the lower surfaces of the rebars 3 and 4 to hook it. The part 31 is located slightly above the tip of the binding arm 40 (FIG. 5).

Next, the binding arm 40 is slightly moved to the left, a loop portion of the binding wire 2 is put on the tip, and the motor 43 is slightly raised from the position of the chain line to lift the binding wire 2 (FIG. 4).
And FIG. 6).

Next, the binding arm 40 is pivoted while moving to the right, the binding wire 2 is twisted and bound, and the yoke 13 of the grasping / cutting device 10 is slightly pivoted about 180 degrees in the direction of the arrow so that the grasping portion is rotated. 14, the binding wire 2 is released, and the cutting unit 19 cuts the binding wire 2 on the drum 1 side. And
The turning of the binding arm 40 is stopped with a predetermined torque, and the binding is completed (FIG. 7).

[0023]

Since the present invention is configured as described above, it has the following effects. (1) Workers can be released from heavy work, and work efficiency can be improved. (2) It can be firmly bound with a U-shaped binding wire. (3) Therefore, it is possible to reduce the cross-sectional area of the binding wire, use a binding wire having low rigidity, and eliminate breakage of the binding wire. (4) Therefore, even if one binding wire breaks, the other binding wire can hold the binding. (5) It is not necessary to process a binding wire in advance by using a necessary amount of a continuous binding wire, and the waste of the binding wire can be eliminated.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the holding / cutting device of FIG. 1;

FIG. 3 is a side view of the grip unit shown in FIG. 2;

FIG. 4 is a view taken in the direction of arrows AA in FIG. 6;

FIG. 5 is a front view showing a state where a guide arm wraps a binding wire around a reinforcing bar.

FIG. 6 is a front view showing a state in which the tip of the binding arm is hooked on a binding wire looped around a guide arm.

FIG. 7 is a front view showing a state in which binding is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drum 2 ... Binding wire 3, 4 ... Rebar 10 ... Holding / cutting device 11 ... Disk cam 12 ... Motor 13 ... Yoke 14 ... Holding part 15. ··· Locking parts 15a, 16a ··· Tooth part 16 ··· Movable part 17 ··· Shaft 18 ··· Spring 19 ···································・ Guide arm 31 ・ ・ ・ Hook part 32 ・ ・ ・ Elevating cylinder 33 ・ ・ ・ Piston rod 40 ・ ・ ・ Bundling arm 41 ・ ・ ・ Arm part 42 ・ ・ ・ Drive part 43 ・ ・ ・ Turning motor 44 ・ ・ ・ Slider 45 ... Slide table

Claims (1)

(57) [Claims] 1. A binding wire drum for storing a binding wire, and a binding wire gripping / cutting device capable of bending the binding wire from the binding wire drum into a U-shape to hold an end and cut the middle. And a guide arm pivotally attached to the elevating cylinder to hang the U-shaped binding wire around the rebar and pull it up, and a binding lever for hooking and twisting the loop portion of the wrapped U-shaped binding wire for binding. A binding device for reinforcing bars.