JPH0626447B2 - Caterpillar type wire support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an electric wire supporter generally referred to as an overhead wire car, and in particular, a segment formed with a guide groove for guiding an electric wire or other accessory. The present invention relates to a caterpillar-type electric wire supporter including an endless chain body formed by connecting a plurality of wires, and a support body having a support surface formed in an arc shape for running the chain body endlessly.

In this specification, the term "electric wire" may include not only a normal power transmission line but also a communication cable such as an optical fiber cable, or various wires or ropes used in a wire drawing operation. There is.

<Prior Art> As a conventional example of this type of caterpillar type electric wire support, for example, JP-A-64-5315 or JP-A-64-
There is one as shown in Japanese Patent No. 5317.

<Problems to be Solved by the Invention> By the way, this type of caterpillar-type electric wire support is a relatively new one that has appeared in connection with high-quality wire drawing, which has been in increasing demand in recent years. There are various problems to be solved in order to exert the effect, but one of them is the problem that the running property of the chain body, that is, smoother and more stable running is obtained.

Then, this invention aims at improvement of the running property of a tuned body.

<Means for Solving the Problems> In order to achieve the above object, according to the present invention, a plurality of segments, each having a traveling wheel attached to a segment main body in which guide grooves for electric wires and other accessory guides are formed, are connected. To form an endless chain body, and the chain body is made to run endlessly on the support surface of a support formed in an arc with the interposition of a running wheel. The wheel is attached to the side surface of the segment body, and the bottom of the guide groove of the segment body is located closer to the support than the rotation axis of the traveling wheel.

<Operation> As described above, the fact that the traveling wheel is attached to the side surface of the segment main body and the bottom of the guide groove of the segment main body is located on the support body side with respect to the rotation axis of the traveling wheel means that the horizontal direction is applied to the chain body. It means that the influence of the load is smaller.

This means that the force that hinders the traveling performance of the chain body, that is, the force that tilts the chain body on the traveling body or tries to disengage the chain body from the support body becomes smaller. Therefore, the traveling property of the chain body is further improved.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the caterpillar type electric wire support 1 is configured such that an endless chain body 3 in which a large number of segments 2, 2, ... A load measuring means 5 is provided below the chain body 3, and a suspension frame 6 for suspending the support body 4 on a steel tower or the like is attached to the support body 4.

Each segment 2 has the same structure,
As shown in detail in FIGS. 2 and 3, the guide groove 10 is formed, and the segment main body 11 and the four traveling wheels 12, 12, which are a pair of left and right and a pair of front and rear, ...
Is the main component.

The segment main body 11 is usually formed of an aluminum alloy molded product and has a substantially V-shaped cross-sectional shape according to the cross-sectional shape of the guide groove 10 described later. The surface 13 is formed.

The guide groove 10 is for receiving and guiding accessories such as an electric wire C and a retention clamp, a sleeve, and a joint protector used for the connecting portion of the electric wire C, and its cross-sectional shape is as shown in FIG. It has a V-shaped two-step structure, and the lower small-diameter portion 10s is for the electric wire C, and the upper large-diameter portion 10l is for an accessory. The guide groove 10 is usually lined with a rubber resin.

A ball bearing is used for each of the traveling wheels 12, and the traveling wheels 12 are attached to the segment body 11 in a state of being housed in traveling wheel houses 14 formed on the left and right sides of the segment body 11.

Specifically, each traveling wheel 12 is a segment main body 1
A pair of core pieces 16 and 16 supported by a bolt 15 screwed into a female screw formed in No. 1 are fitted and pinched in the traveling wheel house 14.

Here, what is characteristic is the formation position of the traveling wheel house 14, that is, the mounting position of the traveling wheel 12. That is, the center line A of the bolt 15 that serves as the rotation axis of the traveling wheel 12, that is, the rotation axis A of the traveling wheel 12 is located higher than the bottom 10b of the guide groove 10, in other words, the guide groove 10 is located. Bottom 10b is located closer to the support 4 than the rotation axis A of the traveling wheel 12. Specifically, it is arranged to be near the boundary between the small diameter portion 10s and the large diameter portion 10l.

The segments 2 are connected to each other so as to form a chain body 3, but this connection is made by pin connection by one connecting piece 18. Specifically, each end of the connecting piece 18 is pivotally supported by a bolt 17 that is screwed into a female screw formed on the bottom of each segment body 11. As described above, it is advantageous to connect the segments 2 by the single connecting piece 18 in terms of weight reduction as a whole, but this is because the traveling wheel 12 is mounted in the above-described mounting state. Has been possible for the first time.

The support 4 has an arcuate support surface, specifically, a pair of left and right rails 21, 21 formed on the arc.

A large number of guide rollers 22, 22, ... Are provided on the inner side surface of each rail 12 at regular intervals, and these guide rollers 22, 22 ,.
The lateral displacement of the segment 2 is regulated via the Nos. 3 and 13.

Reference numeral 23 in the drawing is a guard member symmetrically provided on both sides of the support body 4 for preventing derailment of the electric wire C. Reference numeral 24 is a regulation roller, which is provided at a portion where the support surface 20 disappears, and is a chain. The body 3 is restricted from separating from the support surface 20, and 25 is a guide member for guiding the play portion of the chain body 3, which is a pair of upper and lower rollers 26,
The chain body 3 is guided between 26. In addition, 27
Is a stand for standing the caterpillar-type electric wire support 1 on the ground.

The suspension frame 6 is attached to the support body 4 so as to be rotatable as indicated by an arrow X, and is capable of absorbing front and rear vibrations due to passage of an electric wire or the like. The first
A part of the suspension frame 6 is cut away in the figure, and is not shown in FIG.

As shown in detail in FIGS. 3 and 4, the load measuring means 5 mainly includes a first roller 30, an arm body 31, a second roller 32, and a load cell 33 as a “load detector”. ..

The first roller 30 is axially supported by a rotary shaft 34 fixed to the support body 4 and is in a state of being pressed against the lower surface of the segment 2.

The arm body 31 is composed of a pair of left and right arm pieces 31c and 31c, and the base end portion of the arm body 31 is the rotating shaft 3 of the first roller 30.
The shaft 4 is pivotally supported and is rotatable as indicated by an arrow Y in FIG. 3, and the downwardly rotating push contact 31p is pressed against the load button 35 of the load cell 33.

The second roller 32 includes a first roller between the arm pieces 31c and 31c.
The roller 30 is rotatably supported by a rotary shaft 36 fixed at a position separated from the rotary shaft 34 of the roller 30 by a constant span S, specifically, a span S slightly shorter than the length of the segment 2. It is in a state of being pressed against the segment 2 in a state equal to 30. The illustration of the second roller 32 is omitted in FIG.

The load cell 33 is mounted on a base 37 fixed to the support body 4, and the apex of the load button 35 is located at the second position.
The roller 32 is positioned so as to be separated from the rotation shaft 36 by the span S ′.

The operating state of the load measuring means 5 is as follows.

The load W from the segment 2 is evenly borne by the first roller 30 and the second roller 32 that are pressed against the segment 2 evenly. Therefore, the first roller 30
A load of (1/2) W is applied to the second roller 32 and the second roller 32, respectively.

Then, the load (1/2) W corresponding to the load of the second roller is further reduced by the proportional distribution according to the ratio of the span S and the span S ′ by the lever principle of the arm body 31, and is transmitted to the load cell 33. .

Specifically, since S: S 'is 1: 1 in this embodiment, the load received by the load detector is (1/2) W × (1
/ 2) W = (1/4) W. Therefore, if the load W from the segment 2 is 4t at maximum, the load cell 33
Will be enough with 1t ability.

Further, in the caterpillar-type electric wire supporter 1, as described above, the traveling wheels 12 are attached to the left and right sides of the segment body 11, and the bottoms 10b of the guide grooves 10 of the segment body 11 rotate the traveling wheel 12. Although it is positioned closer to the support body 4 side than the axis A, the influence of the lateral load F applied to the chain body 3 can be further reduced in this caterpillar type electric wire supporter 1.

Specifically, the contact point P to the support 4 of the traveling wheel 12
Since the vertical distance from the bottom 10b of the guide groove 10 which is the portion where the electric wire load acts is small, the moment due to the lateral load F becomes extremely small, and the influence of the lateral load F can be reduced accordingly.

Then, this greatly contributes to the traveling property of the chain body 3. That is, the lateral load F applied to the chain body 3
Acts so as to tilt the chain body 3 on the support body 4 or to bias it on the support body 4, and these also rotate the traveling wheel 12 and the guide roller 22.
That is, it becomes a factor that hinders the running property of the chain body 3, but since the moment of the lateral load F is very small as described above, such a running property hindrance factor is reduced, and the running property of the chain body 3 is reduced. It means being kept better.

<Effects of the Invention> As described above, in the caterpillar-type electric wire support according to the present invention, the traveling wheel is attached to the side surface of the segment body, and the bottom of the guide groove of the segment body rotates the traveling wheel. By being positioned closer to the support than the axis, the influence of the lateral load on the chain body is smaller, and the force that hinders the running performance of the chain body is smaller. The chain body travels more smoothly and stably, which contributes to the realization of more stable wire drawing work.

[Brief description of drawings]

FIG. 1 is a schematic side view including a partial cross section of a caterpillar type electric wire support, FIG. 2 is a cross sectional view taken along the line II-II in FIG. 1, and FIG. 4 is a partial enlarged view including a partial cross section of FIG. 4, and FIG. 4 is a cross sectional view taken along the line IV-IV in FIG. 1 …… Caterpillar type electric wire support 2 …… Segment 3 …… Chain body 4 …… Supporting body 5 …… Load measuring means 10 …… Guide groove 11 …… Segment body 12 …… Running wheel 30 …… First roller 31 ... Arm body 32 ... Second roller 33 ... Load cell (load detector) 34 ... Rotation axis 36 ... Rotation axis A ... Rotation axis C ... Electric wire

Claims (1)

[Claims] 1. An endless chain body is formed by connecting a plurality of segments each having a traveling wheel attached to a segment body having guide grooves for guiding electric wires and other accessories, and the chain body is formed into an arc shape. In a caterpillar type electric wire support, which is made to run endlessly on the support surface of the formed support with a running wheel interposed, the running wheel is attached to the side surface of the segment main body, and the guide groove of the segment main body A caterpillar-type electric wire support characterized in that the bottom of the electric wire is located closer to the support than the rotation axis of the traveling wheel.