JPS6252651B2 - - Google Patents

Description

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

The applicant previously proposed a cross-shaped reinforcing bar binding fitting K as shown in Fig. 1 (Utility Model No. 57-50513
issue). Binding parts K1, K2, K of this binding fitting K
3. After bending K4 as shown in Fig. 2, set this binding fitting at the intersection of upper reinforcing bar S1 and lower reinforcing bar S, and press it to both reinforcing bars (3rd
figure).

An object of the present invention is to provide a reinforcing bar tying machine that can easily and efficiently bind intersections of reinforcing bars using this tying fitting.

Examples of the present invention will be described below.

4 and 5, the reinforcing bar binding machine has a first arm 1 and a second arm. On both sides of the upper part of this first arm are horizontal handles 3,
3 is provided. A bracket 4 is provided approximately in the center of the first arm 1 and faces the second arm 2, and this bracket has a second arm that rotates around an axis 5.
The base 2a of the arm is attached. A second
The arm is rotated about a shaft 5 as a hinge to keep both arms 1 and 2 open at all times, and a cylinder 6 is provided as a driving means to press the first arm and the second arm into pressure contact when binding reinforcing bars. It has been done. That is,
The upper end of the cylinder 6 is attached to the upper end of the first arm 1 via a shaft 7, and the attachment part 9 at the tip of the ram 8 of the cylinder 6 is attached to the outer end of the base 2a of the second arm 2. It is rotatably connected to the shaft 10 around the shaft 10. Therefore, by expanding and contracting the ram 8, the second arm 2 rotates about the shaft 5.

Further, as shown in FIGS. 4 and 6, holding recesses 11 and 12 are formed in the lower inner surfaces of the first and second arms 1 and 2, and a first die 13 and a second die are formed in each recess. The dice 14 are housed therein, and both dice can face each other. Both dies 13 and 14 can be removed from their respective recesses 11 and 12 by bolts 15 and 15, respectively. Binding reinforcing bars S, S1 are placed on the opposing surfaces of the dies 13 and 14.
A semicircular recess 13a larger than the diameter of (Fig. 3)
and 14a are provided, respectively, and both recessed portions are for bringing the binding parts K1 to K4 (FIG. 1) of the binding fitting K into close contact with the reinforcing bars. One side of the opening end of the recess 11 of the first die 13 (upper side in FIG. 4)
At the center, there is a support protrusion 1 horizontally in front of the opening end.
3b, and a groove 13c formed rearward from the opening end is provided at the center of the other side (lower side). The inner surface (lower surface) of the support protrusion 13b is continuous with the inner surface of the recess 13a. Further, the groove portion 13c communicates with the inside of the holding recess 11. Also, the recess 14a of the second die 14
A groove 14b into which the protrusion 13b can fit is provided on one side (upper side in FIG. 4) of the opening end, and a protrusion 14c into which the groove 13c can fit is provided on the other side (lower side). . Projection 14c, groove 14b and recess 14
Similarly to the relationship between the first die and the first die, the inner surface of the protrusion 14c forms a continuous surface with the inner surface of the recess 14a, and the groove 14b communicates with the holding recess. When the dies 13 and 14 are in the fitted state, both the recesses 13a and 14a form a circular shape.

In FIG. 6, 13d and 14d are screw holes for bolts 15, 15.

Next, the binding operation of reinforcing bars S and S1 will be explained. The binding parts K1 to K4 of the binding metal fitting K are bent in advance into a U-shape as shown in FIG.

First, the binding part K of the binding fitting K to the lower reinforcing bar S
1, the winding operation of K3 will be explained with reference to FIGS. 7A and 7B. The binding part K1 is placed on the lower reinforcing bar S, and as shown in FIG. 7A, the binding part and the reinforcing bar S are
is held down, and in this state, the ram 8 of the cylinder 6 is extended, and the second arm 2 is rotated about the shaft 5 to press into contact with each other, and the ties 13 and 14 are fitted together. As a result, the binding part K1 is deformed and wound around the reinforcing bar S as shown in FIG. 7B.

The binding portion K3 is also wrapped around the reinforcing bar S in the same manner.

Also, binding to the upper reinforcing bar S1 can be done by installing a reinforcing bar binding machine from the opposite side, but each die 13, 1
An example of inverting the reinforcing bar 4 and operating the reinforcing bar binding machine from the same direction as the lower reinforcing bar S will be described with reference to FIGS. 8A and 8B. While the binding part K2 of the binding fitting K is engaged with the reinforcing bar S1, the protrusion 13b of the first die 13 is
Then, while supporting this binding part, move the second arm 2
The dies 13 and 14 are fitted together, and the binding part K2 is connected to the reinforcing bar S1 as shown in FIG. 8B.
Wrap it around.

The binding part K4 is wound in the same manner. In this way, the protrusions 13b and 14c support the binding part and temporarily hold the position of the binding part before tying, and also deform the binding part along the outer periphery of the reinforcing bars during tying, so that the groove 13c and 14b, the binding portion is brought into close contact with the reinforcing steel. As a result, the intersecting portions of the reinforcing bars S and S1 are reliably brought into close contact and fixed by the binding parts K1 to K4 of the binding fitting K, as shown in FIG.

If the dies 13 and 14 are made replaceable, the dies can be replaced for each reinforcing bar with a different diameter,
This can be done with one tying machine.

As explained above, according to the present invention, the protrusion of the die can press the bottom of the binding part and temporarily fix the position of the binding part before binding, making it easier to perform the binding work, and also The binding part can be deformed along the outer periphery of the reinforcing bar, and since it fits into the groove, the binding part can be automatically brought into close contact with the reinforcing bar, making the work easier and making it easier to connect the upper reinforcing bar. Binding with a binding fitting at the intersection with the lower reinforcing bar can be performed reliably and efficiently with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the reinforcing bar binding fitting, Fig. 2 is a perspective view showing the state in which each binding part of the reinforcing bar binding fitting is bent, and Fig. 3 is a perspective view showing the state in which the intersection of reinforcing bars is tied with the binding fitting. Figure 4 is a partially sectional front view;
FIG. 5 is a left side view, FIG. 6 is an enlarged sectional view showing the fitted state of the die, FIGS. 7A and 7B are operation explanatory diagrams showing the operation of wrapping the binding fitting around the lower reinforcing bar,
FIGS. 8A and 8B are operation explanatory diagrams showing the operation of wrapping the binding fitting around the upper reinforcing bar. 1...First arm, 2...Second arm, 5
... shaft, 6 ... cylinder, 11, 12 ... holding recess, 13 ... first die, 13a ... recess, 1
3b...Protrusion, 13c...Groove, 14...Second die, 14a...Recess, 14b...Groove, 14
c...Protrusion, 15...Bolt, K...Reinforcement bar binding fitting, S, S1...Reinforcement bar.

Claims (1)

[Claims] 1: a first arm; a second arm rotatably attached to the axis of the first arm; a base of the second arm and the first arm; , and the second arm opens its legs around the above axis,
It is equipped with a cylinder for pressure contact, and first and second dies provided opposite to each other on the inner surface of the lower end of both of the arms, and both of the dies have a semicircular recess for tightly contacting the binding fitting and the reinforcing bar. In addition, protrusions that protrude forward from the opening ends of the recesses of the first and second dies and whose inner surfaces are continuous with the inner surfaces of the recesses are directed rearward from the opening ends of the recesses of the second and first dies, respectively. What is claimed is: 1. A reinforcing bar tying machine, characterized in that the reinforcing bar binding machine is located opposite to and can be fitted into a groove formed by a holding recess and communicating with a holding recess. 2. The reinforcing bar binding machine according to claim 1, wherein the first and second dies are removably provided on the first and second arms.