JPH06132155A - Wire clamping method and wire clamping device - Google Patents

Abstract

PURPOSE:To prevent the clamped wire from coming off even if it receives tension by improving the wire champing art in a winder. CONSTITUTION:A fixed clamp claw 12b and a movable clamp claw 12c are counterposed. The above movable clamp claw 12c is born rotatably as indicated by arrows L, R. This clamp claw 12c is rotated in the direction of an arrow L as shown in the figure (A) prior to inserting a wire 21 between it and the fixed clamp claw 12b, and then the movable clamp claw 12b is rotated in the direction of an arrow R as shown in the figure (B) so as to catch the wire 21. If tension is applied to this wire as indicated by arrow T, the movable clamp claw 12c catches the wire 21 strongly, with its rotation in the direction of an arrow R backed by frictional force, so the come-out of that wire 21 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire clamping method and a wire clamping apparatus for wire winding in a winding machine.

[0002]

2. Description of the Related Art A wire clamp device as a wire end processing means in a winding machine generally has a structure in which a wire is sandwiched by a pair of clamp claws, and the wire is clamped by the force of a spring, for example. ing. As a recent technique relating to this type of wire clamp device, Japanese Patent Laid-Open No. 143408/1990, "Wire Wire Terminal Processing Device for Winding Machine" is known. The purpose and effect of this known invention are mainly to prevent the terminal wire from being cut and the waste wire from scattering, but the wire holding portion is as shown in FIGS. 4 (A) and 4 (B).
The pair of clamp claws 1a shown in FIG. 1A is an integral member and has a pair of clamp surfaces 1b. The pair of clamp claws 2a is also an integral member and has a pair of clamp surfaces 2b. As shown in FIG. 4B, when the pair of clamp claws 1a is rotated clockwise (clockwise) by inserting the wire rod 42 as shown in FIG.
2 is pinched. FIG. 5 shows a known example different from the above, which is disclosed in Japanese Utility Model Application Laid-Open No. 57-100221. A pair of wire rod clamps 4 and 5 clamp the wire rod 6 ', and when the wire rod clamp slides along the shaft 7 toward and away from each other, the wire rod 6'is clamped and released. Also, when it rotates around the shaft 7, it acts as scissors, and the wire 6 '
Can also be cut.

[0003]

In the wire clamping technique in the above-mentioned known example, there is a problem that the wire comes out between the clamp claws when tension is applied to the wire. The present invention has been made in view of the above circumstances, and when a wire clamped by a clamp claw is tensioned, the clamping force automatically increases, and the wire clamp does not have a risk of coming out. It is an object to provide a method and a clamping device suitable for carrying out the above method.

[0004]

The basic principle of the present invention created to achieve the above object will be briefly described. The tension applied to the wire is converted into the clamping force of the clamp claw by the action of the wedge. is there. As a concrete method based on the above-mentioned principle, a wire clamping method according to the present invention is a method of holding a wire by clamping it with a pair of clamp claws, wherein at least one of the clamp claws is reciprocally rotatable. The wire is clamped and released by the reciprocating rotation, and when the wire receives a tension, the tension of the wire applies a turning force in the clamping direction to the clamp claw.

Further, the wire clamping device according to the present invention, which is configured to carry out the above-mentioned method of the present invention, is a device for clamping and holding a wire by a pair of clamp claws, wherein at least one of the clamp claws reciprocates. It is rotatably held, and the wire is pinched by the reciprocating rotation.
It is a structure for releasing, and a structure for giving a turning force in the clamping direction to the clamp claw by the tension of the wire when the wire receives a tension.

[0006]

When the above wire clamping method is carried out by using the above wire clamping device, there is no fear that the operation of pinching the wire between the pair of clamp claws causes extra difficulty.
After the wire is pinched, when the wire is tensioned, the force to pinch is automatically increased in proportion to the tension, and there is no risk of slipping out.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a wire clamp device 1 according to the present invention.
An example is shown, (A) is a schematic plan view and (B) is a front view of the same. A plurality of sets of clamp units 12 are arranged in a row on the support beam 11. In the above clamp unit, a fixed clamp claw 12b and a movable clamp claw 12c are arranged in an outer cylinder 12a.
The upper end of b is projected above the outer cylinder 12a. FIG. 1 is a schematic diagram for explaining the operation of the clamp claw.
The fixed clamp claw 12b is fixed to the outer cylinder 12a. The movable clamp claw 12c is a reciprocating arc arrow L-
Like R, it is supported concentrically with the outer cylinder 12a so as to be reciprocally rotatable, and can assist or drive the rotation as will be described later with reference to FIG.

As shown in FIG. 1 (A), the movable clamp claw 1
2c is rotated in the direction of the arrow L, the wire 21
Is inserted between the fixed clamp claw 12b and the movable clamp claw 12c. In this state (FIG. A), both clamp claws 12b and 12c are separated from each other, so that the wire 21 can be inserted without any particular difficulty. After gently inserting the wire 21 as described above,
(B) As shown in the figure, the movable clamp claw 12c is rotated in the direction of the arrow R to clamp the wire 21. At this time, the rotational force in the direction of the arrow R applied as an operating force from the outside requires a relatively small force as compared with the conventional example (eg, FIG. 4). When tension is applied to the wire 21 in the direction of arrow T in FIG. 1B, the frictional force between the wire 21 and the movable clamp claw 12c acts so as to apply a turning force in the direction of arrow R to the movable clamp claw 12c. As a result, the tension in the direction of the arrow T is converted into the clamping force of the wire 21, and the stronger the tension, the stronger the grip. When the tension in the arrow T direction disappears, the movable clamp claw 12c can be rotated in the arrow L direction with a relatively small force to release the wire 21.

In each of the clamp units 12 shown in FIG. 2, a drive bar A13 and a drive bar B14 are integrally fixed to a movable clamp claw 12c that is rotatably fitted to an outer cylinder 12a. There is. When carrying out the present invention, these drive bars A and B may be configured as one member or may be configured separately. Through the drive bar A13, the movable clamp claw 12c is biased by the tension spring 15 in the clamping direction (clockwise in the drawing). On the other hand, in parallel with the arrangement direction of the plurality of sets of clamp units 12, the operation rod 1
6 is supported so as to be slidable in the axial direction and capable of reciprocating operation. The tip ends of the drive bars B14 are respectively engaged with the operation rods 16, and when the operation rods 16 are operated to the left in the drawing, the movable clamp claws 12c are squeezed in the clamping release direction (in the drawing, via the drive bars B14). It is turned counterclockwise). In the apparatus of the embodiment shown in FIG. 2, when the operating force of the operating rod 16 is not given to the operating rod 16, the movable clamp claw 12c moves the tension spring 15
Is rotated in the clamping direction and abuts on the fixed clamp claw 12b. Therefore, when the operation rod 16 is slid to the left in the drawing, the movable clamp claws 12c of each of the plurality of sets of the clamp units 12 arranged in a row are simultaneously rotated in the clamping release direction, as shown in FIG. ), The movable clamp claw 12c is separated from the fixed clamp claw 12b. Therefore, the wire 21 can be easily inserted into the gap. Then, when the operating force applied to the operating rod 16 is released, the movable clamp claw 12c is released.
Is rotated clockwise by the action of the tension spring 15 described above, as shown in FIG. Figure 1 above
In the state of (B), when tension is applied to the wire 21 in the direction of arrow T, the frictional force between the wire 21 and the movable clamp claw 12c causes the movable clamp claw 12c to rotate in the direction of arrow R to sandwich the wire 21. Find. As a result, the wire 21 is self-locked and does not come out. At this time, the wire 21
Is indicated by a virtual line 21 ', the movable clamp claw 12c
If you wrap it around, it will be held more securely.

Considering an application example of a concrete structure based on the operating principle in the embodiment described with reference to FIGS. 1 and 2, a pair of rotatable holding members 1 as shown in FIG. 3 (A).
By providing 7 and 18, the same action and effect can be obtained. Further, by winding the side where the wire 21 does not receive the tension T as indicated by 21 'indicated by the imaginary line, the clamping action can be more surely performed. In this application example, one of the pair of holding members 17 and 18 can be used as the fixing member. 2 and 3
As shown in FIG. 3 (B), the fixing member 19 and the eccentric cam 20 may be opposed to each other as a structure for exhibiting the self-locking function shown in the principle diagram shown in FIG. 3 (A). With this structure, the fixing member 19 functions as the fixed clamp claw 12b in the above embodiment, and the eccentric cam 20 functions as the movable clamp claw 12c in the above embodiment. in short,
It is possible to prevent the wire 21 from slipping out by providing a member that performs a wedge action of pinching the wire 21 by the tension of the wire 21.

[0011]

As described above, when the clamping method of the present invention is carried out using the clamping device of the present invention, the clamping force automatically increases when tension is applied to the wire, and the wire is reliably pulled out. It has an excellent practical effect of being prevented.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a main part for explaining a basic principle of the present invention, and an operation and an effect.

FIG. 2 shows one embodiment of a clamp device according to the present invention,
(A) is a plan view and (B) is a front view.

3A is a schematic diagram showing an application example of the present invention, FIG.
FIG. 3 is a schematic view of an embodiment different from the above.

FIG. 4A and FIG. 4B are explanatory views showing known wire clamp devices, respectively.

FIG. 5 is a perspective view showing a known example of a wire clamp device.

[Explanation of symbols]

1a ... Clamping claw in known example, 1b ... Clamping surface similarly, 2a ... Clamping claw 2b ... Clamping surface similarly, 4 ... Wire rod clamp in known example different from the above, 5
... Wire rod clamp, 6 '... Wire rod, 12 ... Clamp unit configured by applying the present invention, 12a ... Outer cylinder, 12
b ... fixed clamp claw, 12c ... movable clamp claw, 13 ...
Drive bar A, 14 ... Drive bar B, 15 ... Tension spring, 16 ... Operation rod, 17, 18 ... Rotatable holding member, 19 ... Fixing member, 20 ... Eccentric cam, 21 ... Wire, 21 '... Movable clamp Wire wrapped around the nail.

Claims (5)

[Claims] 1. A method of gripping and holding a wire by a pair of clamp claws, wherein at least one of the clamp claws is reciprocally rotatable, and the wire is clamped and released by the reciprocal rotation, and A method of clamping a wire, wherein when the wire receives a tension, the tension of the wire gives a turning force in a clamping direction to the clamp claw. 2. A device for gripping and holding a wire by a pair of clamp claws, wherein at least one of the clamp claws is reciprocally rotatable, and the wire is clamped and released by the reciprocal rotation. And a structure for applying a turning force in the clamping direction to the clamp claw by the tension of the wire when the wire receives a tension. 3. The wire clamping device according to claim 2, wherein the clamp claw that is held so as to be capable of reciprocating rotation is configured by an eccentric cam. 4. The wire according to claim 2, wherein the reciprocating clamp claw includes spring means for urging a turning force in a direction to clamp the wire. Clamp device. 5. The reciprocating clamp claw is provided with an operation mechanism for rotating the wire in a direction to release the clamp of the wire, according to any one of claims 2 to 4. The wire clamp device described in one of the above.