JP3050517B2 - Guide Mechanism for Wire Binding in Reinforcement Binding Machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar binding machine for binding reinforcing bars or the like buried in concrete.
The present invention relates to a guide mechanism that guides a wire when wound around a rebar and bound.

[0002]

2. Description of the Related Art As a rebar tying machine of this kind, Japanese Utility Model No.
Japanese Patent Application Laid-Open No. 92103/92 is known. In this method, a wire reel wound with a binding wire is guided and sent out in a loop around a reinforcing bar, and then cut and separated from the wire on the wire reel side. A part of the wire wound around the wire is gripped by a torsion hook and twisted to bind the rebar. As shown in FIG. 6, when the torsion hook is twisted and rotated, the wire 20 swings right and left. Therefore, the winding state around the rebar 21 is likely to deviate from the shortest distance of the intersection.

[0003]

The torsion mechanism stops when the torsion torque of the wire reaches a predetermined value, so that the deflection of the wire is also corrected. When the rib 20 is engaged with the rib 22, the wire 20 is swung as shown in FIG. In this case, there is a problem that the binding between the wire and the rib may be disengaged when the concrete is cast or the like, so that the binding becomes unstable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and to provide a guide mechanism for binding a wire in a rebar binding machine capable of always binding a rebar stably by guiding the wire so that the wire does not swing during binding. Is the subject.

[0005]

In order to solve the above-mentioned problems, a guide mechanism for binding a wire in a rebar binding machine according to the present invention feeds a binding wire in a loop around a rebar. In a rebar tying machine having a mechanism, a cutting mechanism for cutting the wire, and a torsion mechanism for gripping and twisting a part of the wire wound in a loop, the wire sent out is guided in front of the torsion mechanism. A vertical slit-shaped guide portion is formed so that the width of the guide portion can be expanded.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral A denotes a reinforcing bar binding machine, in which a wire 4 is pulled out from a wire reel 3 and bent by a bending guide 5 into a body 2 having a grip 1 at a lower portion to bind it. A known wire feed mechanism 7 that winds around the reinforcing bar 6 to be cut, a cutting mechanism 8 that cuts the wire 4 when the winding of the wire 4 is completed, and one wire that is wound around the reinforcing bar 6 when the wire 4 is cut. And a torsion mechanism 9 for twisting the portion.

[0007] On both left and right sides of the torsion mechanism 9, abutment plates 10 for pressing against the rebar 6 are formed. And
A pair of left and right guide members 11 are arranged inside the front end of the contact plate 10 as shown in FIGS. Inside these guide members 11, there is formed a vertical slit-shaped guide portion 12 for guiding the wire 4 sent out from the curved guide 5 so as not to be swung right and left.

As shown in FIGS. 2 (a), 2 (b) and 3, the guide member 11 on each side is vertically divided, and the upper part of the upper guide member 11a and the lower part of the lower guide member 11b are separated from each other. Each is pivotally attached to the support shafts 13 and 14 of the contact plate 10, and is configured to be freely openable and closable in the vertical direction as shown in FIG. The upper and lower guide members 11a and 11b are each spring-biased in the closing direction. Guide members 1 on both sides
The width of the guide portion 12 is expanded by opening the upper and lower portions 1.

In the above construction, the contact plate 10 of the reinforcing bar binding machine is used.
When the front end of the wire 4 is pressed against the crossing of the reinforcing bar 6 as shown in FIG. 1 to operate, the wire 4 sent out by the wire feeding mechanism 7 is wound around the reinforcing bar 6 by the curving guide 5 to form a curl. You. At this time, the wire 4 is
2 and is accurately wound around the intersection of the reinforcing bars 6. When the wire is wound by a predetermined number of turns, the wire 4 is cut by the cutting mechanism, and the torsion hook 9 of the torsion mechanism 9 is further cut.
A part of the wire 4 is gripped and tightened by a.
When the hook 9a rotates, it is swung in the direction of rotation. However, as shown in FIG.
, It is prevented from swinging and held inside the guide. For this reason, the wire 4
As shown in FIG. 5, the shortest portion of the intersection can be securely bound without protruding from the intersection of the reinforcing bars 6.

Incidentally, the twisted portion 1 of the bound wire 4
3 is larger than the width of the guide portion 12, so that when the binding machine is separated after the binding, the torsion portion 13 is connected to the guide portion 12.
The upper and lower guide members 11a and 11b on the left and right sides of the guide portion 12 are pushed by the torsion portion 13 as shown in FIG.
Is opened, and the torsion portion 15 is released to the outside. Therefore, the operation can be performed smoothly without any obstacle in operation.

The guide member constituting the guide section 12 is not limited to a structure which can be opened and closed vertically. The guide portion may be expanded by opening and closing both left and right sides.

As described above, according to the guide mechanism for binding a wire according to the present invention, the wire 4 wound around the rebar 6
Is guided by the guide portion 12 so as not to be swung during torsion, so that the shortest portion of the intersection of the reinforcing bars 6 can be stably bound at all times.

[Brief description of the drawings]

FIG. 1 is an external side view of a reinforcing bar binding machine employing a guide mechanism at the time of wire binding in a reinforcing bar binding machine according to the present invention.

2 (a) and 2 (b) are enlarged views of main parts on the side and front of the guide mechanism.

FIG. 3 is a perspective view of a main part of a guide unit.

FIG. 4 is an explanatory view of an operation mode of the guide mechanism.

FIG. 5 is an explanatory diagram of a binding state in a state of being bound by the guide mechanism.

FIG. 6 is an explanatory view of a conventional binding state.

[Explanation of symbols]

 Reference Signs List 4 binding wire 7 wire feeding mechanism 6 rebar 8 wire cutting mechanism 9 wire twisting mechanism 12 guide section

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shuichi Ishii 6-6, Hakozaki-cho, Nihonbashi, Chuo-ku, Tokyo Inside Max Co., Ltd. (56) References JP-U 5-92103 (JP, U) JP-U 7 −40411 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65B 13/00-13/34 B65B 27/00-27/12

Claims (1)

(57) [Claims] 1. A mechanism for feeding a binding wire in a loop around a reinforcing bar, a cutting mechanism for cutting the wire, and a part of the wire wound in a loop to be gripped and twisted. In a reinforcing bar binding machine having a twisting mechanism, a longitudinal slit-shaped guide portion for guiding the fed wire is formed in front of the twisting mechanism, and the width of the guide portion is formed to be expandable. A guide mechanism at the time of wire binding in a reinforcing bar binding machine.