JPH0644251Y2 - Back tension device for wire drawing car - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a back tension device (hereinafter, simply referred to as "back tension device") for a wire-drawn vehicle.

[Conventional technology]

As a conventional back tension device, for example, Japanese Patent Laid-Open No.
There is something like that shown in No. 58-43116.

[Problems to be solved by the device]

By the way, in the wire-drawn wheel, not only the electric wire or the wire passes, but also a portion having a diameter many times larger than that of the electric wire such as the wire-drawing clamp or the joint protector.

However, in the conventional back tension device, sufficient consideration has not been given to the passage of such a different diameter portion.

Therefore, an object of the present invention is to provide a back tension device that can smoothly pass through different diameter portions and can reliably apply back tension to the different diameter portions.

[Means for Solving the Problems]

Specifically, for applying tension by arranging the movable second sandwiching means having the idle rotating body opposite to the fixed first sandwiching means having the rotating traveling body connected to the braking force generating means. And a second pinching means,
Provided is a back tensioning device which is capable of advancing and retracting and tilting with respect to a first holding means in a biased state in a direction of narrowing a holding path, and a back tensioning device provided with a plurality of second holding means. provide.

[Action]

In this back tension device, a sandwiching passage, that is, a sandwiching "passage" having a certain length is formed by the first and second sandwiching means each equipped with a rotating traveling body, and the sandwiching passage is formed. By doing so, the tension is applied to the electric wire or the different diameter object passing therethrough, so that the tension can be surely applied.
Further, the second clamping means is urged in the direction of narrowing the clamping passage, and the second clamping means is movable forward and backward with respect to the first clamping means to absorb the diameter change and to smoothly pass the different diameter portion. Moreover, since the second holding means is tilted with respect to the first holding means, that is, "swinging" is performed, it is possible to flexibly deal with the diameter step portion between the electric wire or wire and the different diameter object. More reliable and stable tension can be applied.

Such tension application becomes more reliable and stable by providing a plurality of second clamping means in series. In other words, when there are a plurality of second clamping means, even if one of them is caught on the diameter step portion, the other is always placed at a portion other than the diameter step portion, that is, a state where a more reliable clamping can be performed. It is always obtained, and more reliable and stable tension can be applied.

〔Example〕

An embodiment of the back tension device according to the present invention will be described below. In the following description, parts common to the respective embodiments will be denoted by the same reference numerals, and redundant description will be appropriately omitted.

This embodiment is an example of the back tension device 1 used in the protector automatic passage type extended vehicle L as shown in FIG.

This wire drawing vehicle L has a wire W and an electric wire E as shown in FIG.
It is possible to pass a series of passing objects, in which the protector P is attached to the connecting portion, and to pass the protector P through the drum D.
On the other hand, the protector P is supported by the support tool S which is automatically attached and detached by the robot mechanism.

The back tension device 1 is for applying a predetermined tension (back tension) to the electric wire E or the like entering the drum D. The back tension device 1 has a diameter several times larger than that of the electric wire E and the wire W. The protector P that it has also passes through.

This back tensioning device 1 has a first holding means 2 and a second holding means 3 as shown in FIG. 1 and FIG.
The holding passage 4 is formed by arranging and the opposite positions, and the holding passage 4 having an appropriate length L can surely apply a necessary tension to the electric wire E by holding the holding passage 4 with the holding passage 4. Is.

The first holding means 2 includes a rotating traveling body 5 having a crawler-like structure, and the rotating traveling body 5 is connected to the braking force generating means 6 and is fixed. In this example, a hydraulic pump / motor is used as the braking force generating means 6.

The second sandwiching means 3 is provided with a similar rotating traveling body 7, but this rotating traveling body 7 is for idle and is adapted to freely rotate and travel in response to passage of the electric wire E and the like.

The second holding means 3 is movable and is connected to a low-friction air cylinder 8, which is always urged by the air cylinder 8 in a direction to narrow the holding passage 4 and 1 It can be moved back and forth toward the holding means 2. That is, the width of the holding passage 4 is changed according to the change in the diameter of the passing object. Further, the second holding means 3 is configured to perform tilting as indicated by the arrow X, that is, "pivot" with respect to the first holding means 2. Specifically, the shaft member 11 provided on the U-shaped tubular support member 10 is pivotally supported, and "swing" is performed with the shaft member 11 as a fulcrum. This "pivot" is to flexibly deal with the diameter step portion M between the electric wire E or the wire W and the protector P, and the diameter step portion M is dealt with as shown in FIG. By doing so, it is possible to more reliably and stably apply tension.

FIG. 4 shows another embodiment. In this back tension device 20, two second holding means 3 similar to those described above are provided in series.

When two second clamping means 3 are continuously provided in this manner, even if one of the second clamping means 3 hangs on the diametrical step portion M, the other one is always placed on a portion other than the diametrical step portion M, that is, a more reliable clamping. You can always get a state where you can pinch what you can
Stable tension can be applied.

In addition, the above embodiment is an example in which the protector automatic passage type wire drawing vehicle is used, but the back tension device according to the present invention is not limited to this, and it is also applicable to a normal wire drawing vehicle. Not to mention.

[Effect of device]

Since the back tension device according to the present invention is as described above, it has the following effects.

(A). Since the tension is applied by the nipping in the nipping passage formed by the first and second nipping means each having the rotating traveling body, the tension can be surely applied.

(B). Since the second holding means can be moved back and forth to absorb the diameter change, the passage of the different diameter portion is smooth.

(C). Since the second holding means is tilted, it is possible to flexibly cope with the diameter step portion between the electric wire or wire and the different diameter object, and more reliable and stable tension application can be performed.

(D). By providing a plurality of second clamping means in series,
The part that can be easily clamped can always be clamped, and more reliable and stable tension can be applied.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a back tension device, FIG. 2 is a schematic side view as seen from the direction of arrow II in FIG. 1, and FIG. 3 is an explanatory view of a tilted state of a second holding means. FIG. 4 is a schematic plan view of a back tensioning device according to another embodiment, FIG. 5 is a schematic side view of a railway vehicle with a back tensioning device attached, and FIG. 6 is a view of passing through the back tensioning device. It is a schematic side view of a passing object. 1, 20 ... back tension device, 2 ... first clamping means, 3 ... second clamping means, 4 ... clamping passage, 5, 7 ...
Rotating traveling body, 6 ... Braking force generating means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Kawakami 3-27-12 Horikiri, Katsushika-ku, Tokyo Inside Yasuda Manufacturing Co., Ltd. (72) Shiroji Miyoshi 3-27-12 Horikiri, Katsushika-ku, Tokyo Stock company, Yasuda Manufacturing Co., Ltd. (72) Shinichi Yamashita, 3-12-12 Horikiri, Katsushika-ku, Tokyo Stock company, Yasuda Manufacturing Co., Ltd. (72) Osamu Ito 3-27-12 Horikiri, Katsushika-ku, Tokyo Stockholders Inside Yasuda Factory

Claims (2)

[Scope of utility model registration request] 1. Tensioning is provided by arranging a movable second pinching means having a rotating body for idle against a fixed first pinching means having a rotating body connected to a braking force generating means. Is a back tensioning device for a wire drawing vehicle that forms a holding passage, and the second holding means is movable forward and backward with respect to the first holding means and tilts in a biasing direction in a direction of narrowing the holding passage. A back tensioning device for an extended line car, which is characterized by being flexible. 2. The back tension device for a wire drawing vehicle according to claim 1, wherein a plurality of second holding means are provided.