JPH0111637Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a constant tension pulling device for a wire rod in a winding jig or the like.

Conventionally, in this type of winding jig, etc., when winding a toroidal core, for example, the toroidal core is wound with a wire a predetermined number of times, the wire is drawn in, and then the toroidal core is wound with a wire a predetermined number of times. The work of winding the wire and pulling the wire in is repeated, but this wire drawing was done manually. For this reason, workers rely on their experience and intuition to draw in the wire, which has the disadvantage of making continuous work difficult and resulting in large variations in finishing accuracy.

The present invention has been devised in view of the above points, and its purpose is to provide a conventional constant tension wire drawing device with a simple structure and at low cost.

According to the present invention, the wire rod is fixed to two rotating shafts arranged parallel to each other, and in a state in which they are in contact with each other, the wire rod inserted between the contact surfaces is moved in the insertion direction by rotation around the said rotating shafts. two rubber rollers for retraction; and two rubber rollers that also serve as bearings for the rotating shafts of each of the two rubber rollers, are arranged opposite to each other, and are substantially parallel to an imaginary plane that includes the insertion direction and the contact surface. two pieces having inner side surfaces close to each other and outer side surfaces separated from each other that are opposite to the inner side surfaces and are substantially parallel to the virtual plane; and the two pieces are provided between the inner side surfaces of the two pieces; a first spring that biases the two pieces in a direction away from each other when the rubber rollers are in contact with each other;
a holding surface that slidably holds the outer side surfaces of the two pieces and faces each other at a distance of a first distance and is substantially parallel to the virtual plane; and a holding surface that is spaced a predetermined distance from the holding surface in a direction opposite to the insertion direction. and the first
a piece moving guide having a retraction surface facing away from a second distance that is longer than the distance between the two pieces; two side links connected to each other and extending in substantially the same direction as the insertion direction, and rotatably connected between the other ends of the two side links in a direction substantially perpendicular to the insertion direction; connected by one extending bottom link;
a connecting mechanism that allows the two rubber rollers to move in a plane substantially perpendicular to the axial direction of the rotating shaft; and a second link that biases the bottom link in the insertion direction.
a spring, and when a predetermined tension is applied by the second spring to the wire inserted between the contact surfaces of the two rubber rollers and drawn in the insertion direction, the two The pieces move the predetermined distance along the holding surface, and the first spring moves the two pieces toward the outer side where the two pieces are separated from each other, so that the outer side surface meets the retraction surface. A spring type constant tension wire drawing device characterized in that the wire rod is retracted to a contact position, a gap is created between the two rubber rollers, and the drawing of the wire rod by the two rubber rollers is released. can get.

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

The spring type constant tension wire drawing device according to the present invention is
It has two stable states: before the wire is drawn and after the wire is drawn. FIG. 1 is a front view seen from the drive side showing the state before the wire is drawn in, and FIG. 2 is the same view after the wire is drawn in. Further, FIG. 3 shows a plan view taken along line A-A' in FIG. 1.

Referring to Figures 1, 2 and 3, two swingable rubber rollers 10, 1 for drawing in the wire rod are shown.
Pieces 11, 11 which also serve as bearings are provided coaxially with the roller 0. The pieces 11, 11 are held by guides 12, 12 from the direction of their outer side surfaces separated from each other, and three links 13, 13,
It is connected to the tension setting spring 14 via 13'. Furthermore, the pieces 11, 11 are connected at their inner side surfaces with an opening spring 15. Guide 12,
Arms 17, 17 for returning pieces, each having a substantially U-shape, are fixed to the outer side surface of the frame 12. Arm 17,
17 is a rotating shaft 17a, 1 fixed to the pedestal 16.
It is rotatably held around 7a. Pedestal 1
6 is provided with an opening 16a for drawing in the wire. Further, the tension setting spring 14 biases the link 13 downward as shown in FIG. 2, and the release spring 15 biases the pieces 11, 11 outward and laterally as shown in FIG. ing.

Next, the operation of the present invention when winding a toroidal core will be explained with reference to FIG.

First, in the initial state (FIG. 4a), the two rubber rollers 10, 10 are rotated around the rotating shafts 10a, 10a in opposite directions as shown by the arrows in the figure, while in contact with each other, by a drive unit (not shown). are doing. In this state, as shown in FIG.
Insert between 0 and 10. Note that the wound toroidal core 20 is fixed above the opening 16a of the pedestal 16. At this time, the wire rod 21 is drawn under the rubber rollers 10, 10. The drawing of the wire 21 is as shown in FIG. 4c.
The process is carried out at a constant speed (peripheral speed of the rubber roller 10) until the wire 21 between the toroidal core 20 and the rubber rollers 10, 10 does not loosen. As shown in FIG. 4c, the stretched wire 21 is then
The pieces 11, 11 are pulled into the guides 12, 12 by the pulling force of the rubber rollers 10, 10 against the bias of the tension setting spring 14 (Fig. 1), as shown in Fig. 4d. rising along. Then, as shown in Figure 4d,
The pieces 11, 11 are in the grooves 12a, 1 of the guides 12, 12.
2a and a predetermined tension is applied to the wire 21 by the tension setting spring 14, the pieces 11, 11 are separated from each other by the urging force of the opening spring 15, as shown in FIG. 4e. Grooves 12a, 12
a, a gap is created between the rubber rollers 10, 10, and the drawing of the wire 21 is completed.

After the wire rod 21 is drawn in, the wire rod 21 is inserted between the rubber rollers 10 and 10 and into the opening 1 of the pedestal 16.
6a, and then move the guides 12, 12 away from each other by pushing and spreading the return arms 17, 17 (Fig. 2) as shown in Fig. 4f, and as shown in Fig. 4a. As shown, the pieces 11, 11 return to their initial positions due to gravity and the downward urging of the link 13 of the tension setting spring 14 (Fig. 1), and the rubber rollers 10, 10 are in contact with each other in opposite directions. It rotates and becomes retracted again.

The above-mentioned device can be applied to large toroidal cores that cannot be handled by toroidal winding machines, and to wire tensioning processes in the winding process of thick wires.

As is clear from the above explanation, according to the present invention,
With a simple and inexpensive device, it has become possible to pull the wire with a predetermined tension.

[Brief explanation of the drawing]

Figures 1, 2 and 3 are diagrams showing the configuration of the spring-type constant tension wire drawing device according to the present invention. FIG. 3 is a plan view taken from A-A' in FIG. 1, and FIG. 4 is a diagram for explaining the operation of the present invention. . 10... Rubber roller, 11... Piece, 12... Guide, 14... Tension setting spring.

Claims (1)

[Claims for Utility Model Registration] A wire rod is inserted between the contact surfaces by being fixed to two rotating shafts arranged parallel to each other and in contact with each other by rotation about the said rotating shafts. Two rubber rollers 10 for pulling in the direction
and inner side surfaces close to each other that serve as bearings for the rotating shafts of each of the two rubber rollers, are arranged opposite to each other, and are substantially parallel to a virtual plane including the insertion direction and the contact surface; two pieces 11 having mutually separated outer side surfaces facing the inner side surfaces and substantially parallel to the virtual plane; and a piece 11 provided between the inner side surfaces of the two pieces, with the two rubber rollers in contact with each other. a first spring 15 that urges the two pieces away from each other in the state
With the two rubber rollers in contact with each other,
a holding surface that slidably holds the outer side surfaces of the two pieces and faces each other at a distance of a first distance and is substantially parallel to the virtual plane; and a holding surface that is spaced a predetermined distance from the holding surface in a direction opposite to the insertion direction. and the first
a piece moving guide 12 having a retraction surface that faces and is spaced apart from a second space that is longer than the distance between the two pieces; two side links 13 connected to and extending in substantially the same direction as the insertion direction, and rotatably connected between the other ends of the two side links and extending substantially perpendicular to the insertion direction. a connecting mechanism connected by one bottom link 13' extending in the direction, and allowing movement of the two rubber rollers in a plane substantially perpendicular to the axial direction of the rotating shaft; a second biasing side link in the insertion direction;
a spring 14, when a predetermined tension is applied by the second spring to the wire inserted between the contact surfaces of the two rubber rollers and drawn in the insertion direction, the second spring 14 The pieces move the predetermined distance along the holding surface, and the first spring moves the two pieces toward the outer side where the pieces are separated from each other so that the outer side surface moves toward the retracting surface. a spring-type constant tension wire drawing device, characterized in that the wire is retracted to a position where it comes into contact with the rubber rollers, a gap is created between the two rubber rollers, and the drawing of the wire rod by the two rubber rollers is released. .