JP2796525B2 - Rolling wire car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the recent extension work of overhead power transmission lines, a construction method (prefab extension) in which a rigid body such as an end clamp or a straight clamp is attached in advance and extended is adopted. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire drawing wheel in which a rigid portion such as an electric wire and a clamp is placed on a shoe chain on a roller rotatably supported in a vertical direction in an overhead transmission line extension work and the electric wire and the rigid portion are sent out. .

[0002]

2. Description of the Related Art In the construction of overhead power transmission lines, when a cable is laid, a wire drawing wheel is conventionally used to change the sending direction of the cable to be laid and to support the cable to be sent in the air. Have been. In the case where the cable is extended by applying tension to the cable, it is desirable that the wire be passed smoothly without giving any distortion to the cable. Heretofore, a single wheeled wheel car, a half moon wheeled wheel, and the like have been known as this wire drawn wheel car.

[0003] The single wheel wheel generally supports a single pulley having a U-shaped groove on its outer periphery in a rotatable manner, and pulls out a cable along the groove. Determined by the diameter of In addition, the half moon wheel has a plurality of small rollers arranged in a single arc between two half moon-shaped side plates, so that the cable has a relatively large radius of curvature and is relatively small as compared with a single wheel wheel. Can be passed. However, since the cable passes over the small roller,
When a high tension is applied, the cable passes through the small-diameter roller, so that the contact surface between the roller and the roller is brought into a point contact state, which has an adverse effect such as crush of the cable.

[0004] In order to solve the above-mentioned problem, a wire drawn wheel train disclosed in Japanese Patent Publication No. 47535/1992 has been developed. In this method, a plurality of small rollers are arranged along an arc of an arc-shaped side plate, and an endless shoe chain that moves in the longitudinal direction by contacting the plurality of small rollers is provided. ) And the problems such as crushing are improved. By arranging the small rollers in a circular arc of about 1/3 through which the electric wire passes, there is an advantage that a smaller radius wheel than a wheel wheel and a larger radius of curvature than a wheel wheel can be obtained.

However, by adopting the prefabricated wire drawing method,
A straight rigid body, such as a clamp attached to a cable, must be passed through the wire drawing wheel. One wheel car, 4-4
In the case of the wire drawing wheel disclosed in Japanese Patent No. 7535, when a straight rigid portion passes through any of the wire drawing wheels, the contact surface to the wheel becomes a support state close to point contact, and There is a problem that a component force in the direction of bending is applied and the rigid portion and the cables at both ends of the rigid portion are damaged. In order to solve this, the rigid part is covered with a steel protector to protect the rigid part and the cables at both ends of the rigid part, but the outer diameter of the protector is large,
In addition, the weight is heavy, which increases the work load and obstructs the passage of the gold wheel.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art.
An object of the present invention is to provide a wire drawing wheel that allows a cable to be drawn and a rigid body to pass through without causing deformation or breakage, facilitates wire drawing work, and has a smooth shoe chain movement. is there.

It is a second object of the present invention to provide a wire drawing wheel in which the support arm rotates smoothly even when the wire drawing wheel is inclined and suspended. A third object is to provide a wire drawing wheel in which the shoe chain can be prevented from running laterally and the shoe chain runs smoothly.

[0008]

[0009]

The present invention achieves the above object.
In order to do so, claim 1 is a pair of side plates spaced apart, and a plurality of small rollers arranged in an arc between these side plates with a rotation axis orthogonal to the side plates,
An endless shoe chain that contacts the plurality of small rollers and moves in the longitudinal direction on the small rollers;
A tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain and the small roller have a concave portion and a convex portion which are fitted to each other in a direction of movement of the shoe chain at a contact portion thereof. And
Each shoe constituting the shoe chain has a groove for accommodating a cable on a side opposite to a surface facing the small roller, and the concave groove is in a range where the shoe chain is in contact with the small roller. In a wire drawing wheel in which the small rollers are arranged to form an arc shape, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks. And a plurality of the small blocks are connected to each other by a middle connecting arm to form a middle block, and the middle blocks are connected to each other by a large connecting arm to form a large block. Both sides of the shoe chain are pivotally supported so as to be vertically rotatable individually between the side plates around a connection portion. A portion facing with the travel of the shoe chain, characterized in that a rolling guide rollers.

A second aspect of the present invention provides a pair of side plates spaced apart from each other, and a plurality of small rollers arranged in an arc between the side plates with a rotation axis orthogonal to the side plates.
An endless shoe chain that contacts the plurality of small rollers and moves in the longitudinal direction on the small rollers;
A tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain and the small roller have a concave portion and a convex portion which are fitted to each other in a direction of movement of the shoe chain at a contact portion thereof. And
Each shoe constituting the shoe chain has a groove for accommodating a cable on a side opposite to a surface facing the small roller, and the concave groove is in a range where the shoe chain is in contact with the small roller. In a wire drawing wheel in which the small rollers are arranged to form an arc shape, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks. And a plurality of the small blocks are connected to each other by a middle connecting arm to form a middle block, and the middle blocks are connected to each other by a large connecting arm to form a large block. A pivot is pivotally supported in the up and down direction individually between the side plates around a coupling portion, and the middle coupling arm and the large coupling The chromatography arm rotatably supported on the side plate by the support arm, characterized in that a inner surface the rolling contact rolling roller of the side plate on the support arm.

A third aspect of the present invention provides a pair of side plates spaced apart from each other, and a plurality of small rollers arranged between the side plates in an arc with a rotation axis perpendicular to the side plates.
An endless shoe chain that contacts the plurality of small rollers and moves in the longitudinal direction on the small rollers;
A tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain and the small roller have a concave portion and a convex portion which are fitted to each other in a direction of movement of the shoe chain at a contact portion thereof. And
Each shoe constituting the shoe chain has a groove for accommodating a cable on a side opposite to a surface facing the small roller, and the concave groove is in a range where the shoe chain is in contact with the small roller. In a wire drawing wheel in which the small rollers are arranged to form an arc shape, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks. And a plurality of the small blocks are connected to each other by a middle connecting arm to form a middle block, and the middle blocks are connected to each other by a large connecting arm to form a large block. The side plates are pivotally supported so as to be individually rotatable in the vertical direction around the connecting portion, and the tension roller is There consists magnitude different tension roller, the shoe chain and redirecting the large-diameter tension roller, characterized in that the small diameter tension roller and elastically pressed against the inside of the shoe chain.

A plurality of small blocks connected to a plurality of small rollers are connected to each other by a plurality of pieces, and are formed into a middle block. The middle blocks are connected by a plurality of pieces to form a large block, and the middle block and the large block are connected. When the cable passes through the shoe chain, when the rigid part existing in the middle of the cable approaches the shoe tune, the small roller follows the rigid part when the cable passes through the shoe chain. The rigid parts are arranged in a straight line and are supported in line contact with the shoe chain.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing the internal structure of a wire drawing wheel, FIG. 2 is a side view thereof, and FIG. 3 is a front view showing the same appearance. In FIGS. The main body 1 is composed of two side plates 2 each having a fan-shaped arc portion 2a arranged at a predetermined interval. Between the two side plates 2, a plurality of, for example, three small rollers 3 are arranged at predetermined intervals along the arc portion 2a.

These small rollers 3 are rotatably fitted to a shaft 4 as shown in FIG. An annular concave portion 3a is formed at an intermediate portion of the small roller 3 in the axial direction. Further, three adjacent small rollers 3 are shafts 4.
Are connected by small connecting arms 5 that pivotally support both ends thereof, and a plurality of small blocks 6 are configured.

Further, of the three small rollers 3 constituting the small block 6, both ends of the shaft 4 rotatably supporting the intermediate small roller 3 penetrate the small connecting arm 5 and protrude outside. . In addition, two adjacent small blocks 6
Are connected by a middle connecting arm 7 to form a middle block 8. That is, the middle connecting arm 7 is substantially U-shaped, and both ends thereof are rotatably connected to the end of the shaft 4 that penetrates through the small connecting arm 5 and protrudes to the outside. A connection roller 9 is provided at an intermediate portion of the middle connection arm 7.

Further, two adjacent middle blocks 8 located in the middle of the plurality of middle blocks 8 are connected by a large connecting arm 10 to form a large block 11. That is, both ends of the large connecting arm 10 are provided with long holes 12 for connecting the connecting roller 9 provided at the intermediate portion of the middle connecting arm 7 so as to rotate and move freely. The middle blocks 8 located at both ends are supported by a support arm 13 whose base end is rotatably supported by a side plate 2 by a pivot shaft 13a so as to be vertically rotatable. It is rotatably connected to an intermediate portion of the middle connecting arm 7. The large connecting arm 10 located at an intermediate portion of the side plate 2 is rotatably supported in a vertical direction by a central support arm 14 whose base end is rotatably supported by the side plate 2 by a pivot 14a. ing.

According to the present embodiment, as shown in FIG.
Twenty-four small rollers 3 are formed into eight small blocks 6, and eight small blocks 6 are further formed into four middle blocks 8. As shown in FIG. 4, an opening 15 is provided at an intermediate portion in the longitudinal direction of the support arm 13 and the center support arm 14, and a roller bracket 16 is fixed to the opening 15 by a bolt 17. . A rolling roller 19 having a roller shaft 18 oriented in the direction in which the arm extends is rotatably supported on the roller bracket 16, and the rolling roller 19 is in rolling contact with the inner surface of the side plate 2. That is, when the support arm 13 and the center support arm 14 rotate, the rolling roller 19 rolls on the inner side surface of the side plate 2 so that the support arm 13 and the center support arm 14 rotate smoothly.

An inverted V-shaped hanging bracket 20 is provided outside the two side plates 2, and a hook 21 is provided at an upper end thereof for hooking to a steel tower or the like. They are connected by a plate 22. At the lower end of the hanging member 20, there is provided a pivot shaft 23 which penetrates through the side plate 2 and protrudes between the side plates 2, and the base end portion of the hanging member 20 is pivotally supported by the pivot shaft 23. ing.

Further, two stopper pins 24 for regulating the rotation range of the central support arm 14 and two stopper pins 25 for regulating the rotation range of the support arm 13 are provided on the inner side surface of the side plate 2. I have.

As described above, the small block 6 and the middle block 8
An endless shoe chain 26 that moves in the longitudinal direction is stretched over a plurality of small rollers 3 connected by the large block 11. The shoe chain 26 is configured by connecting a number of shoes 27 by connecting links 28.

The shoes 27 constituting the shoe chain 26
On the side that contacts the small roller 3, a convex portion 27a that fits with the annular concave portion 3a is provided. On the opposite side of the surface that contacts the small roller 3, a concave groove for accommodating a cable 29 to be extended, for example, A U-shaped groove 30 is provided.

As shown in FIG. 1 and FIG. 3, shafts 31 are provided at both ends of the two side plates 2 so as to protrude upward.
A derailment prevention roller 32 for preventing the derailment from coming off is rotatably supported.

Further, as shown in FIGS. 5 and 6, openings 33 are provided at both longitudinal ends of the small connecting arm 5 of the small block 6 facing both sides of the shoe 27 of the shoe chain 26. A roller bracket 34 is fixed to the opening 33 by a bolt 35. A guide roller 37 having a roller shaft 36 oriented in the direction in which the arm extends is rotatably supported on the roller bracket 34, and the guide roller 37 is in rolling contact with both side surfaces of the shoe 27. That is, when the shoe chain 26 runs, the individual shoes 2
7 is smoothly guided by the guide rollers 37.

Further, a center tension portion 38 is provided at the center of the lower end of the side plate 2 and side tension portions 39 are provided at both sides.
Is provided. First, the center tension portion 38 will be described. Reference numeral 40 shown in FIG. 7 is a support plate fixed between the pair of side plates 2, and the support plate 40 is provided with two left and right outer cylinders 41 protruding downward. An adjusting bolt 42 is provided through the center of the outer cylinder 41.

Below the support plate 40, a roller support plate 43 supported by the lower end of the adjusting bolt 42 is provided. Is provided. A support plate 40 and a roller support plate 43 are provided inside the fitting of the outer cylinder 41 and the inner cylinder 44.
A coil spring 42a is interposed in a compressed state, and presses the roller support plate 43 elastically downward.

Two right and left tension rollers 45 are rotatably supported on the roller support plate 43. The tension roller 45 has an annular groove 45 at an intermediate portion in the axial direction like the small roller 3, which is fitted with the convex portion 27 a of the shoe 27.
a is provided, and urethane rubber 45b is provided on the outer peripheral surfaces of both ends.
Is coated. And the coil spring 42
A predetermined tension is applied to the shoe chain 26 by the tension roller 45 pressed downward by the elastic force a.

Further, two vertical roller shafts 46 are provided on both sides of the roller support plate 43 so as to protrude downward, and a horizontal roller shaft 48 is provided between the lower end portions of the vertical roller shafts 46 via a bracket 47. It is erected. A vertical roller 49 is rotatably fitted to the vertical roller shaft 46 and guides both sides of the shoe 47. A horizontal roller 50 is rotatably fitted to the horizontal roller shaft 48, and Guides the outer periphery.

As shown in FIG. 1, the side tension portion 39 has the same structure on the left and right sides. Therefore, one of the side tension portions 39 will be described. The support shaft 52 is pivotally supported by the side plate 2 so as to be freely rotatable. A large-diameter roller 53 is attached to the pivot 52.
Are rotatably supported, and the large diameter rollers 53 change the direction of the shoe chain 26 running endlessly with a large radius of curvature.

Further, a small-diameter roller 54 is rotatably supported at the tip of the rotating lever 51 so that the shoe chain 26 is rotatable.
Is in contact with the inner peripheral side of. A tension spring 55 is stretched between the base end of the rotating lever 51 and the side plate 2.
Is elastically pressed from the inner peripheral side to the outer peripheral side of the shoe chain 26 to apply a predetermined tension to the shoe chain 26.

FIG. 9 shows another embodiment in which the cable 29 is inserted into and removed from the wire pulling wire along the arrangement direction of the small rollers 3 on the back side plate 2 of the pair of side plates 2. The opening 55 is provided so as to be opened and closed by an opening / closing door 56. An opening / closing lock mechanism of the opening / closing door 56 is known from Japanese Utility Model Publication No. 59-2278.
A lower end portion of an opening / closing door 56 is pivotally supported on the lower edge of the door 5 by a hinge mechanism 57 so as to be rotatable outward.

A fitting hole 59 is provided at the upper edge of the door 56 to be fitted with a protruding piece 58 protruding from the upper end of the side plate 2, and a locking groove 60 is provided on the lower surface of the protruding piece 58. Have been. A knob 61 with a spring is protrudingly provided on the outer surface of the opening / closing door 56 located near the fitting hole 59.
, An intermediate portion of an opening / closing lever 62 is pivotally supported. The opening / closing lever 62 is pressed against the opening / closing door 56 by a knob 61 with a spring. A locking portion 64 locked in the locking groove 61 is provided at one end, and a handle portion 65 is provided at the other end. ing. And knob 6 with spring
1, and by rotating the rotating lever 62 with the handle 61 as a fulcrum by holding the handle portion 65, the locking portion 64 can be disengaged from the locking groove 60.
Can be opened and closed.

FIG. 8 shows an example of use of the above-described wire drawn wheel.
Reference numerals 70-1, 70-2, 70-3, 70-4, etc. denote towers for power transmission lines, which usually have a height of 50 to 100 m above the ground. Reference numerals 1-5, 1-2, 1-3 and 1-6 denote a wire drawing wheel according to the present invention, 71 denotes a drum site, and 72 denotes an engine site. Next, the cable 29 and the rigid body 29
The operation of the wire drawing wheel when a passes through the wire drawing wheel will be described. A rigid portion 29a having a length of 500 to 600 mm is provided in the middle of the cable 29 by a connecting portion.

Cable 2 pulled out from drum place 71
9 is laid over a U-shaped groove 30 provided in the shoe chain 26 of each wire drawing wheel, and the leading end of the cable 29 is connected to the engine field 72 to apply tension to the cable 29.
As the cable 29 travels, the shoe chain 26 is guided by the plurality of small rollers 3 and travels endlessly in the same direction as the cable 29 travels.

Then, as shown in FIG.
9, when the rigid part 29a reaches the left side of the side plate 2 of the wire drawing wheel, the rigid part 29a is inserted into the U-shaped groove 3 of the shoe 27.
In a state fitted to zero, the shoe 27 is pressed in the direction of the center of curvature of the arc portion 2a of the side plate 2. Therefore,
The support arm 13 on the left side rotates in the direction of arrow a with the pivot shaft 13a as a fulcrum, and the middle block 8 rotates in the direction of arrow b with the connection with the support arm 13 as a fulcrum.

The central support arm 14 is provided with a pivot shaft 14a.
And the large connecting arm 10 rotates in the direction of arrow d with the connecting portion of the central support arm 14 as a fulcrum. Further, the middle block 8 at the left end of the large connecting arm 10 rotates in the direction of arrow e with the connecting roller 9 as a fulcrum, and moves left and right within the range of the elongated hole 12 to form two middle blocks on the left side. The small block 8 and the small block 6 are substantially in line with the rigid portion 29a. But,
The cable 29 on the side in the running direction from the rigid portion 29a is curved following the shoe chain 26 arranged in an arc shape along the arc portion 2a of the side plate 2 for flexibility.

The traveling of the cable 29 proceeds and the cable 29
Of the side wire 2 of the wire drawing wheel is approximately at the center from the left side of the side wire 2 of the wire drawing wheel.
When the right connecting arm 10 of the large block 11 is moved to the right side over the central portion of the large block 11, the large connecting arm 10 rotates in the direction of the arrow i from the lower left inclination to the lower right inclination with the central support arm 14 as a fulcrum.
In the meantime, the middle connecting arm 7 of the middle block 8 constituting the large block 11 also rotates about the connecting roller 9 as a fulcrum, and follows the rigid body portion 29a to be substantially on a straight line.

Further, when the traveling of the cable 29 proceeds and the rigid portion 29a in the middle of the cable 29 reaches the right side of the side plate 2 of the wire drawing wheel, the rigid portion 29a fits into the U-shaped groove 30 of the shoe 27. In a state where they are combined, and the shoe 27 is attached to the side plate 2
Is pressed in the direction of the center of curvature of the circular arc portion 2a. Therefore, the support arm 13 on the right side rotates in the direction of arrow f with the pivot 13a as a fulcrum, and the middle block 8
3 is rotated in the direction of arrow g with the connecting portion with 3 as a fulcrum.

The center support arm 14 is provided with a pivot shaft 14a.
, And the large connecting arm 10 rotates in the direction of the arrow i with the connection with the central support arm 14 as a fulcrum. Further, the middle block 8 at the right end of the large connecting arm 10 rotates in the same direction with the connecting roller 9 as a fulcrum, and the two middle blocks 8 and the small blocks 6 on the right side are substantially aligned with the rigid part 29a. become. However, the cable 2 on the side opposite to the running direction from the rigid body 29a
9 is curved to follow the shoe chain 26 arranged in an arc shape along the arc portion 2a of the side plate 2 to have flexibility.

Therefore, even if the rigid portion 29a exists in the middle of the cable 29, the contact surface to the wheel is in a line contact supporting state, and no component force is applied to the rigid portion 29a in the bending direction. Rigid body 29a and rigid body 29a
The cable 29 passes smoothly without damaging the cable 29 at both ends.

The rotation range of the support arm 13 and the center support arm 14 is regulated by the stopper pins 24 and 25. Therefore, even if a large pressing force is applied from the cable 29, the small block 6, the middle block 8 and the large block No force is applied to 11. Further, since the derailment prevention rollers 32 are provided at both left and right end portions of the side plate 2, the cable 29 and the rigid portion 29 a can be prevented from coming off the U-shaped groove 30.

Since the center tension portion 38 and the side tension portion 39 are provided at the lower end of the side plate 2, a constant tension can be applied to the shoe chain 26, and the shoe chain 26 is attached to the small roller 3. Can be close. In addition, when the shoe chain 26 runs while being guided by the small-diameter rollers 3, the shoes 27 of the shoe chain 26 are in contact with the guide rollers 37 provided on the small connecting arm 5 so that the shoes 27 of the shoe chain 26 It is guided and runs smoothly.

A rolling roller 19 is rotatably supported on the support arm 13 and the central support arm 14 at a middle portion in the longitudinal direction thereof via a roller bracket 16. It is in contact with the inner surface. Therefore, even if the wire drawing wheel is inclined and suspended, the rolling roller 19 rolls on the inner side surface of the side plate 2 when the support arm 13 and the central support arm 14 rotate, and the support arm 13 and the central support arm 14 are rotated. Rotates smoothly.

Further, a predetermined tension is applied to the shoe chain 26 by a center tension portion 38 and a side tension portion 39. In particular, the side tension portion 39 causes the shoe chain 26 running endlessly by a large diameter roller 53 to have a large radius of curvature. Since the direction is changed, the shoe chain 26 can run smoothly.

[0044]

As described above, according to the first aspect of the present invention,
According to the present invention, a plurality of small rollers provided on a wire drawing wheel are formed into a plurality of small blocks, a plurality of these small blocks are arranged, and the small blocks are formed into a plurality of middle blocks. A plurality of large blocks are provided, and the middle block and the large block are pivotally supported so as to be vertically rotatable with respect to a support arm.

Therefore, even if a rigid portion exists due to a cable joint or the like in the middle of the cable, the plurality of small rollers follow the rigid portion and become substantially straight, and the rigid portion has a linear contact surface with the shoe chain. It is in the state of contact support,
No component force in the bending direction is applied to the rigid part, and the rigid part and the cables at both ends of the rigid part can pass smoothly without damaging, and the wire drawing work can be facilitated. . Further, the shoe chain
As the shoe chain travels on the part facing both sides of the
With a guide roller that rolls
The running resistance of the chain is reduced and the vehicle runs smoothly.
effective.

[0046]

According to the second aspect , the middle connecting arm and the large connecting arm are rotatably supported on the side plate by the supporting arm, and the supporting arm is provided with a rolling contact roller for rolling contact with the inner surface of the side plate. Thus, even if the wire drawing wheel is inclined and hung, the support arm can be smoothly rotated.

According to the third aspect , by providing the large diameter tension roller and the small diameter tension roller on the tension roller, the direction of the shoe chain can be smoothly changed by the large diameter tension roller, and the desired tension can be applied to the shoe chain by the small diameter tension roller. Is provided, and there is an effect that run-out of the shoe chain can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing the internal structure of a wire drawing wheel showing an embodiment of the present invention.

FIG. 2 is a side view showing the internal structure of the wire drawing wheel of the embodiment.

FIG. 3 is an exemplary front view showing the appearance of the wire drawing wheel of the embodiment;

FIG. 4 is a front view and a vertical sectional side view of the central support arm of the embodiment.

FIG. 5 is a front view of the small connecting arm of the embodiment.

FIG. 6 is a vertical side view of the small connecting arm of the embodiment.

FIG. 7 is a front view and a vertical sectional side view of a center tension portion of the embodiment.

FIG. 8 is a view showing a use state of the wire drawn wheel of the embodiment.

FIG. 9 is a front view and a side view of an opening / closing door lock mechanism according to another embodiment of the present invention.

FIG. 10 is a front view for explaining the operation of the wire drawing wheel of the present invention.

[Description of Signs] 1 ... Main body of wire drawing wheel 2 ... Side plate 3 ... Small roller 6 ... Small block 8 ... Middle block 11 ... Large block 13 ... Support arm 14 ... Center support arm 19 ... Rotating roller 26 ... Shoe chain 27 ... Shoe 29 ... Cable 37 ... Guide roller 38 ... Center tension roller 39 ... Side tension roller

──────────────────────────────────────────────────続 き Continuing on the front page (72) Fumio Kato, Inventor 2-2-17, Shiba, Minato-ku, Tokyo Sumitomo Electric Co., Ltd. (72) Nobuyuki Kawakami 3-27-12, Horikiri, Katsushika-ku, Tokyo Stock Company Yasuda Factory (56) References JP-A-8-289425 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 1/02

Claims (3)

(57) [Claims] 1. A pair of side plates arranged apart from each other, a plurality of small rollers arranged in an arc between the side plates with a rotation axis orthogonal to the side plates, and a plurality of small rollers arranged between the side plates. An endless shoe chain that contacts the small roller and moves on the small roller in the longitudinal direction, and a tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain, the small roller, Has a concave portion and a convex portion that fit together in the direction of movement of the shoe chain at the contact portion, and each shoe constituting the shoe chain accommodates a cable on the opposite side of the surface facing the small roller. It has a concave groove, and the concave groove has a shape that forms an arc shape in which the small rollers are arranged in a range where the shoe chain is in contact with the small rollers. In the above-described wire drawing wheel, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks, and a plurality of these small blocks are arranged. A middle block is connected by a connecting arm, and the middle blocks are connected to each other by a large connecting arm to form a large block. Each of the side plates is vertically turned around the connecting portion of the small block, the middle block, and the large block. A wire drawing wheel comprising a guide roller movably pivoted and provided at a portion opposed to both side surfaces of the shoe chain so as to roll as the shoe chain runs. 2. A pair of side plates arranged apart from each other, a plurality of small rollers arranged in an arc between the side plates with a rotation axis perpendicular to the side plates, and a plurality of small rollers arranged between the side plates. An endless shoe chain that contacts the small roller and moves on the small roller in the longitudinal direction, and a tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain, the small roller, Has a concave portion and a convex portion that fit together in the direction of movement of the shoe chain at the contact portion, and each shoe constituting the shoe chain accommodates a cable on the opposite side of the surface facing the small roller. It has a concave groove, and the concave groove has a shape that forms an arc shape in which the small rollers are arranged in a range where the shoe chain is in contact with the small rollers. In the above-described wire drawing wheel, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks, and a plurality of these small blocks are arranged. A middle block is connected by a connecting arm, and the middle blocks are connected to each other by a large connecting arm to form a large block. Each of the side plates is vertically turned around the connecting portion of the small block, the middle block, and the large block. The movable arm is pivotally supported, and the middle connecting arm and the large connecting arm are rotatably supported on the side plate by a supporting arm, and a rolling contact roller is provided on the supporting arm for rolling contact with the inner surface of the side plate. Rolling wire car. 3. A pair of side plates arranged apart from each other, a plurality of small rollers arranged between the side plates in an arc with a rotation axis orthogonal to the side plates, and a plurality of small rollers arranged between the side plates. An endless shoe chain that contacts the small roller and moves on the small roller in the longitudinal direction, and a tension roller provided on the side plate to apply tension to the shoe chain, wherein the shoe chain, the small roller, Has a concave portion and a convex portion that fit together in the direction of movement of the shoe chain at the contact portion, and each shoe constituting the shoe chain accommodates a cable on the opposite side of the surface facing the small roller. It has a concave groove, and the concave groove has a shape that forms an arc shape in which the small rollers are arranged in a range where the shoe chain is in contact with the small rollers. In the above-described wire drawing wheel, the plurality of small rollers are connected to each other by at least three small connecting arms to form small blocks, and a plurality of these small blocks are arranged. A middle block is connected by a connecting arm, and the middle blocks are connected to each other by a large connecting arm to form a large block. Each of the side plates is vertically turned around the connecting portion of the small block, the middle block, and the large block. The tension roller is movably pivoted, and the tension roller is formed of a tension roller having a different outer diameter. The direction of the shoe chain is changed by the large-diameter tension roller, and the small-diameter tension roller is elastically pressed against the inside of the shoe chain. A wire drawn wire car characterized by the following.