JP2001139234A - Steel stranded wire drawing-out device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress swelling of a steel stranded wire to the outside of a drum to its rigidity without relying on a worker to facilitate handling of the steel stranded wire in the steel stranded wire stretching work. SOLUTION: This steel stranded wire drawing-out device is provided with a support roller 20 supporting rotatably a part which is below a drum 30 around which a steel stranded wire 34 is wound and a plurality of regulation rollers 46 arranged along the peripheral direction of an outer peripheral part in the outer peripheral part of a part which is above the drum 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for feeding a stranded steel wire used for laying a stranded steel wire wound around a drum as a support wire for a cable.

[0002]

2. Description of the Related Art In order to negotiate the above-mentioned steel stranded wire by pulling it out of the drum by pulling, a pair of support stands having a jack function are used to freely rotate both ends of a shaft passed through the axis of the drum. We take a method to support. By the way, a stranded steel wire is formed by twisting a plurality of steel wires into a bundle, and is very strong.

[0003]

If the drum is turned too much when the stranded wire is fed from the drum, the stranded wire expands toward the outside of the drum due to its rigidity, and the stranded wire is wound around the drum. The state is disturbed, resulting in a turbulent state. As a countermeasure, workers are placed near the drum to apply appropriate braking to the rotation of the drum, and to hold down the bulge of the stranded steel wire by hand. The present invention is intended to solve this problem, and its purpose is to prevent the steel stranded wire from expanding outward due to its rigidity without relying on an operator,
The purpose is to make it easier to handle stranded steel wires in the erection work.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to claim 1 rotatably supports a lower portion of a drum on which a stranded steel wire is wound. And a plurality of regulating rollers arranged along the circumferential direction at the outer peripheral portion of the upper portion of the drum. As a result, when the steel stranded wire wound around the drum is fed out and negotiated, it is possible to suppress the steel stranded wire from being greatly expanded to the outside of the drum by the respective regulating rollers and to prevent the steel stranded wire from being turbulently wound. The handling in the wire laying work becomes easy.

According to a second aspect of the present invention, there is provided the steel wire feeding device according to the first aspect, wherein both ends of each regulating roller are
Each holding plate disposed on both sides of the drum is supported so as to be adjustable in position in the radial direction of the drum. By adjusting the position of each regulating roller with respect to both holding plates in this way, even for various types of drums having different outer diameters, the outward swelling and irregular winding when the steel stranded wire wound therearound is fed out is adjusted. It can be suppressed appropriately.

According to a third aspect of the present invention, there is provided the stranded wire feeder according to the second aspect, wherein each regulating roller is brought into contact with the outer periphery of both flanges of the drum between each regulating roller and the holding plate. Is provided.
Therefore, a rotational load is applied to both flanges of the drum by the contact force of the respective regulating rollers by the spring, and it is possible to prevent the drum from rotating too much due to the traction force applied to the steel stranded wire.

According to a fourth aspect of the present invention, there is provided the twisted steel wire feeding device according to the third aspect, wherein the elastic force of each spring acting on each regulating roller can be adjusted.
In this way, the elastic force of each spring can be adjusted, and the rotation of each regulating roller according to the second aspect of the present invention can be appropriately adjusted for drums having different outer diameters. Can be loaded.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a steel wire feeding device, and FIG.
FIG. 2 is a side view of FIG. 1. The base 10 of the steel stranded wire feeding device can be freely moved at four locations by casters 14 individually attached via caster brackets 12. Note that all or a part of the casters 14 have a rotation lock function. Further, fixing portions 16 are integrally provided at the four corners of the base 10, and these can be fixed together with bolts and hooks so as not to move the base 10 to the bed of the vehicle. Further, the base 10 is provided with each caster 14
Are provided with bolt retainers 22 protruding laterally at four places near the bolts, and these bolt retainers 22 can respectively connect bolts 24 upward.

On the upper surface of the base 10, a pair of support rollers 20 are arranged so as to be rotatable on axes parallel to each other. Both ends of these two support rollers 20 are respectively supported by roller brackets 18 fixed to the base 10, and the two support rollers 20 use the steel stranded wires 34.
Can be supported on the drum 30 (total weight of 125 to 201 kg) on which is wound. Note that the lower outer periphery of the flange 32 on both sides of the drum 30 is supported by the two support rollers 20. The steel stranded wire 34 wound around the drum 30 is used as a support wire for a cable as described above, and has a high rigidity, and when it is unwound from the drum 30, it swells outward greatly, and a turbulent winding state occurs. Easy to occur. Therefore, the regulation device 40 is used to suppress such a phenomenon.

The structure of the regulating device 40 is roughly divided into a holding plate 42 arranged on both sides of the drum 30 and a plurality (five) of regulating rollers 46 extended between the holding plates 42. Is done. Both holding plates 42 are plates having a size larger than a semicircle having a hole 43 at the center, and have a linear shape below the center of each. A pair of left and right connection brackets 54 are fixed to the outer side surfaces of both holding plates 42, so that the bolts 24 can be individually connected thereto. By connecting the bolt retainer 22 of the base 10 and the connection bracket 54 of the holding plate 42 with these bolts 24, the regulating device 40 is mounted on the side of the base 10 and is held in that state.

FIG. 3 is an enlarged side view of a part of FIG. As is apparent from this drawing, support holes 44 for passing the ends of the respective regulating rollers 46 are formed along the circumferential direction near the outer periphery of both holding plates 42. These support holes 44 are long in the radial direction of the holding plate 42, and the regulating rollers 46 can be individually moved (position adjustment) in the radial direction within this length range. Note that the length of each support hole 44 is not uniform, and the hole located directly above is the shortest, and is set longer toward both sides. The reason is that when the position of each regulating roller 46 is adjusted in accordance with the outer diameter of the drum 30 as will be described later, the greater the distance between these regulating rollers 46 on both sides of the holding plate 42, the larger the moving amount. Is required.

At both ends of each regulating roller 46, connecting metal fittings 48 are provided outside the corresponding holding plate 42.
Is attached. The connection fitting 48 and both ends of the regulating roller 46 have a coupling structure in which the regulating roller 46 can rotate around its axis. On the other hand, the holding plate 4
A spring stopper 52 is provided on the side of 2 at a location near the center corresponding to each connecting bracket 48, and a spring 50 is individually applied between each connecting bracket 48 and the spring stopper 52. I have. By these springs 50, each regulating roller 46 is always pulled toward the center in the range of each support hole 44.

The spring stopper 52 corresponding to the one regulating roller 46 having the smallest movement amount in the range of the support hole 44 is directly fixed to the holding plate 42.
For the other spring stoppers 52, the holding plate 42
And a movable member 52B on which the spring 50 is hooked is connected with an adjustment bolt 52C. That is, for the regulating roller 46 having a large movement amount in the range of the support hole 44, the movable member 52 is operated by operating the adjustment bolt 52C of the spring stopper 52.
By changing the position of B, the elastic force of the spring 50 can be adjusted.

Next, the work of arranging the stranded steel wires 34 by the stranded steel wire feeding device having the above-described configuration will be described. First, the drum 30 around which the steel stranded wire 34 is wound is placed on the both support rollers 20.
On the upper part, the outer peripheral portions below the two flanges 32 are supported by these support rollers 20. Next, the restricting device 40 is set so as to cover the outside of the drum 30, and the connecting bracket 54 of both holding plates 42 and the bolt retainer 22 of the base 10 are connected by the bolt 24. At this time, each regulating roller 46 is in contact with the outer peripheral portion above the flange 32 between the two holding plates 42.

In this state, the base 10, the drum 30
In addition, the regulating device 40 is a single unit, and can perform a small movement due to the rolling of the caster 14 and a loading / unloading of the vehicle from / to the carrier. When a traction force is applied to the steel stranded wire 34 for bridging, the drum 30 rotates on both support rollers 20 and the steel stranded wire 34 is sequentially fed. At this time, each regulating roller 46 is connected to each spring 5
Due to the zero force, the flanges 32 are always in contact with the outer peripheral portions on the upper sides of the flanges 32 and are rotating.

Therefore, the drum 30 has a flange 32
The rotation load is applied based on the contact force of each of the regulating rollers 46 with respect to, and the protrusion and expansion of the steel stranded wire 34 with respect to the drum 30 are regulated by each of the regulating rollers 46. As a result, excessive rotation of the drum 30 is prevented, and the steel stranded wire 34 is prevented from being in a turbulent state. Note that the rotational load on the drum 30 is
It can also be adjusted by increasing or decreasing the resistance to zero rotation. Further, as described above, each of the regulating rollers 46 (including the roller located directly above) can move in the radial direction of the holding plate 42 while receiving the force of the spring 50 within the range of each of the support holes 44. As a result, rattling due to rotation of the drum 30 due to unevenness of the outer peripheral shape of the flange 32 is absorbed.

As shown in FIG. 2, the steel twisted wire 34 is fed out between the return preventing rollers 56 provided on the regulating device 40, thereby preventing the steel twisted wire 34 from returning due to its rigidity at the moment when the traction force is reduced. May be. The use of the return prevention roller 56 is more effective in preventing the stranded steel wire 34 from bulging or winding. The return prevention roller 56 is a kind of one-way mechanism, and may use a well-known one-way stopper or the like.

FIG. 4 is an explanatory view showing the position adjustment of each regulating roller 46 according to the difference in the outer diameter of the drum 30 (flange 32). As shown in this drawing, even when the outer diameter of the flange 32 is greatly different as shown by the solid line and the imaginary line, the movement of one regulating roller 46a located immediately above the center with respect to the holding plate 42 hardly occurs. On the other hand, for example, the regulating rollers 46b located on both sides move by the dimension d in the radial direction of the holding plate 42. In order to secure this amount of movement, the support hole 4
4 is set long. Regardless of such a large movement amount, the elastic force of the spring 50 is adjusted by the adjustment bolt 52C of the spring stopper 52 as described above in order to maintain the contact force of each regulating roller 46 against the outer periphery of the flange 32 uniformly. It is adjustable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a steel stranded wire feeding device.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged side view of a part of FIG. 2;

FIG. 4 is an explanatory diagram showing displacement of a regulating roller corresponding to drums having different outer diameters.

[Explanation of symbols]

 Reference Signs List 20 support roller 30 drum 34 steel stranded wire 46 regulating roller

Claims (4)

[Claims] 1. A support roller rotatably supporting a lower portion of a drum around which a steel stranded wire is wound, and a support roller arranged along the circumferential direction at an outer peripheral portion of the upper portion of the drum. A steel stranded wire feeding device including a plurality of regulating rollers. 2. The steel wire feeding device according to claim 1, wherein both ends of each of the regulating rollers are adjustable in a radial direction of the drum with respect to respective holding plates disposed on both sides of the drum. Stranded wire feeding device supported by 3. A steel stranded wire feeding device according to claim 2, wherein a spring is provided between each regulating roller and the holding plate so as to contact each regulating roller with the outer periphery of both flanges of the drum. Stranded wire feeder. 4. The steel wire feeding device according to claim 3, wherein the elastic force of each spring acting on each regulating roller is adjustable.