JPH06247623A - Wire extracting rotary table - Google Patents

Abstract

PURPOSE:To provide a wire extracting rotary table capable of smoothly rotating a drum regardless of some irregularities on the ground surface and the deformation of the flange of the drum and capable of rotatably setting the drum without causing off-centering via the safe and simple work. CONSTITUTION:When a drum 12 is to be mounted on the rotary plate 4 of a base 3, a leg member 7 floating the base 3 from the ground surface and supporting it at three points is provided on the lower face side of the base 3, and a rotary plate 4 erecting a support shaft 2 and rotatable around the support shaft 2 is provided on the upper face side of the base 3. Three rollers 9 supporting the lower face of the rotary plate 4 at three points are arranged on the upper face side of the base 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary table for drawing wire rods.

[0002]

2. Description of the Related Art For example, in the wiring work of a high-rise building or a factory, a drum having electric wires wound around its surface is brought into the field, and a round steel pipe is inserted into a through hole passing through the shaft center of the drum. Both ends of this round steel pipe were laid laterally between columns temporarily assembled on site to rotatably support the drum, and an electric wire of a required length is fed from the drum.

However, since a drum in which electric wires are wound many times normally weighs several hundred kilograms, laterally supporting the drum with the round steel pipe is a very temporary work, although it is a temporary work. It is very dangerous because the columns may fall down due to external force or vibration received from the wires. Therefore, there is a rotary table 30 as shown in FIG. 8 and FIG. 9 that rotatably supports the drum with the shaft center oriented vertically. The rotary table 30 is formed by stacking upper and lower ring members 31 and 32, which have a circular overall shape and a U-shaped cross section, via bearings 33, and which are placed on the ground 34 on the rotary table 30. By mounting the drum 35 so that its axis is oriented vertically, the drum 35 is supported rotatably around its axis.

[0004]

However, in the above-described conventional rotary table 30, when the unevenness of the ground 34 is large, the ring members 31, 3 are caused by the own weight of the drum 35.
2 may curve up and down, and smooth relative sliding may not be obtained. Further, since the lower ring member 32 is used by directly mounting it on the ground 34, when the irregularities of the ground 34 or the peripheral edge of the flange 36 of the drum 35 is deformed, the deformed portion hits the ground 34 and the drum 35 May not be able to rotate smoothly, and the deformation of the peripheral edge of the flange 36 may be more severe.

On the other hand, on the rotary table 30, the drum 35 cannot be set unless the drum 35 is floated from the ground 34 as shown in FIG.
Further, there is a drawback that it takes a lot of time to align the rotary table 30 and the drum 35, and even if the alignment is done with difficulty, the core is immediately misaligned as the drum 35 rotates.

In view of the above situation, the present invention allows the drum to rotate smoothly even if there are some irregularities on the ground or deformation of the flange of the drum, and the drum can be rotated safely and easily without misalignment. The purpose is to be able to set freely.

[0007]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, in the wire rod drawing rotary table according to the present invention, the leg member that floats the base from the ground and supports it at three points is provided on the lower surface side of the base, and the support shaft is erected on the upper surface side of the base. In addition, a rotatable plate is provided around the support shaft, and three rollers that support the lower surface of the rotatable plate at three points are arranged on the upper surface side of the base.

[0008]

The leg member provided on the lower surface of the base supports the base at three points by levitating it from the ground, so that it avoids interference between the ground and the drum, and there is some unevenness on the ground. Also supports the base in a stable state. The three rollers arranged on the upper surface of the base support the shaft end side of the rotating plate at three points from below, so even if the flange of the drum mounted on the plate is slightly deformed, it will not rattle. It rotates without causing the wire to be pulled out smoothly.

When the drum is placed on the rotary plate of the base, the support shaft erected on the upper surface of the base is inserted through the through hole provided in the shaft center of the drum. The shaft functions as a mark when the drum is aligned with the base. Also, if the support shaft is inserted into the through hole of the drum with the shaft center facing horizontally, then the drum is lifted from the ground by raising the rotary table together with the drum so that the support shaft is oriented vertically. Can be set on a rotating table without.

[0010]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. As shown in the figure, the rotary table 1 for drawing out the wire rod employed in this embodiment is rotatably supported on a base 3 on which a support shaft 2 is erected in the center of the upper surface. The rotary plate 4 is made of a steel disk, and a circular hole 4a having a diameter slightly larger than that of the support shaft 2 is provided at the center of the rotary plate 4.

The base 3 has a pair of upper and lower connecting plates 5 arranged in the center thereof, and three arm members 6 having a hollow rectangular cross section, and each arm member 6 has a longitudinal direction. The connecting plates 5 are radially extended outward from the center of the connecting plate 5 so that the angle formed therebetween is 120 degrees in the same plane. The connecting plate 5 is in the shape of a disc made of steel, and a pair of upper and lower plates is welded to the upper and lower surfaces of the connecting portion of each arm member 6 to strengthen the connection between the arm members 6.

The support shaft 2 is made of a steel solid round bar, and is erected on the upper surface of the central portion of the upper connecting plate 5, that is, on the center of an equilateral triangle whose apex is the grounding position of each roller 8 described later. Has been done. Leg members 7 projecting vertically downward from the outer ends of the respective arm members 6 are integrally formed with each other. Therefore, the base 3 mainly composed of the arm members 6 is supported by the leg members 7 at three points in a state of being levitated from the ground 8. A cushioning member such as a rubber plate may be provided on the ground surface of the leg member 7.

On the upper surface side of each arm member 6 and at a distance from the support shaft 2 by a certain distance, rollers 9 are provided which contact the lower surface of the rotary plate 4 and support it, respectively. In the embodiment, a radial ball bearing in which balls are interposed between an outer race and an inner race having a short tubular shape is adopted. That is, on the upper surface of the middle portion in the longitudinal direction of the arm member 6, brackets 10 having an L shape in side view are erected so as to face each other, and by inserting the bolts 11 into the inner races of the rollers 9 arranged between the brackets 10,
The roller 9 is rotatably attached to the bracket 10. The axial direction of the roller 9 (bolt 11) is set to the longitudinal direction of the arm member 6.

The rotating plate 4 is mounted on each roller 9 of the base 3 so that the supporting shaft 2 is passed through the round hole 4a, and is supported rotatably around the supporting shaft 2 through the rolling of each roller. To be done. A machine screw 4b is provided at the base of the support shaft 2, and the rotary plate 4 is attached by the machine screw 4b.
I'm holding out. The machine screw 4b is not always necessary, and the rotation plate 4 and the base 3 may be easily attached and detached without providing the machine screw 4b.

On the other hand, the drum 12 which is rotatably supported by the rotary table 1 is formed by fixing disk-shaped flanges 14 to both ends of a cylindrical winding portion 13, and a wire material 15 such as an electric wire.
Is wound around the wrapping portion 13 in multiple layers. A through hole 16 through which the support shaft 2 can be inserted is provided at the axial center of the drum 12. Therefore, as shown in FIG. 2, when the drum 12 is placed on the rotary plate 4 so that the support shaft 2 is inserted into the through hole 16, the drum 12 has three axial rollers whose end face in the axial direction passes through the rotary plate 4. It is supported at three points by 9 and is rotatably supported around the support shaft 2 as the roller 9 rolls.

It should be noted that the roller 9 may have a spherical rolling element which can freely rotate. In this case, the rolling element makes point contact with the rotating plate 4 and the same plate 4 is used.
Since it is easily damaged and lacks in stability, it is preferable to adopt a tubular shape as in this embodiment as much as possible. A rubber ring may be fitted over the contact portion of the roller 9.

Next, with reference to FIG. 3, an example of a work procedure for setting the drum 12 on the rotary table 1 will be described. First, as shown in FIG. 3 (a), the support shaft 2 of the rotary table 1 is inserted from the side of the drum 11 into the through hole 16 of the horizontally oriented drum 12 which has been rolled in and carried in the ground 8.
The rotary plate 4 of the rotary table 1 is brought into contact with the flange 14 of the drum 11.

Then, as shown in FIG. 3 (b), while maintaining the above contact state, the rotary table 1 is raised together with the drum 12 so that the support shaft 2 is oriented vertically by the lever principle. The drum 12 can be rotatably set on the rotary table 1 about the vertical axis without raising the drum 12 from the ground 8. In this case, as shown in FIG. 4, if the rope 18 is tied to the hook 17 provided on the upper end of the support shaft 2 and the rotary table 1 is raised while pulling the rope 18, the table 1 is pressed from below. Since the contact state with the drum 12 can be maintained even if it is not stored, the work can be performed more safely.

Further, as shown in FIG. 5, if a retaining member 21 formed by projecting a handle 20 on the end portion of the screw shaft 19 is screwed onto the upper end of the support shaft 2, the above case can be obtained. Similarly, the contact state between the rotary table 1 and the drum 12 can be maintained without pressing the rotary table 1 from below. 6 and 7 show a second embodiment of the present invention.

The difference of this embodiment from the first embodiment is that
The cylindrical tubular body 22 into which the support shaft 2 is inserted is fixed to the upper surface side of the central portion of the rotary plate 4 in the direction normal to the rotary plate 4, and other points are almost the same as in the first embodiment. is there. The lower end of the cylindrical body 22 is welded to the rotary plate 4 at a position corresponding to the round hole 4a, and a hook 23 is integrally provided at the upper end. The inner diameter of the cylindrical body 22 is the same as that of the round hole 4a of the rotary plate 4, and the length of the cylindrical body 22 is longer than the axial length of the drum 12.

When the rotary plate 4 with the cylindrical body 22 is adopted, it is possible to install the drum 12 as shown in FIG. That is, the cylindrical body 22 is inserted into the through hole 16 of the drum 12.
After attaching the wire 24 to the hook 23, the drum 12 is lifted by a forklift or the like, and the drum 12 is lowered by inserting the support shaft 2 of the base 3 placed on the ground 8 into the cylindrical body 22. By doing so, the drum 12 can be rotatably set on the base 3.

Also in this embodiment, as shown in FIG.
Needless to say, the installation work shown in can be performed. In each of the embodiments described above, when the diameter of the through hole 16 of the drum 12 is large and there is too much play between the support shaft 2 or the cylindrical body 22,
The sleeve may be fitted into the support shaft 2.

Further, the rotary table 1 in each embodiment.
Can be applied not only to electric wires but also to drums around which metal wires such as steel wires and hoses and other wire materials are wound.

[0024]

As described above, according to the present invention,
The leg members float the base from the ground and support it at three points, and the rollers support the rotating plate from three points at the bottom, so the drum rotates smoothly even if there is some unevenness on the ground or deformation of the drum flange. It can be supported and the wire rod can be easily pulled out.

Further, according to the present invention, the support shaft functions as a mark for aligning the drum, and the drum can be set on the rotary table without floating from the ground. And simplification can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a turntable according to a first embodiment.

FIG. 2 is a front sectional view of the same.

FIG. 3 is an explanatory diagram of a work procedure.

FIG. 4 is an explanatory diagram of a work procedure.

FIG. 5 is an explanatory diagram of a work procedure.

FIG. 6 is a front sectional view of a turntable according to a second embodiment.

FIG. 7 is an explanatory diagram of a work procedure.

FIG. 8 is a cross-sectional view of a conventional rotary table.

FIG. 9 is an explanatory diagram of a conventional work procedure.

[Explanation of symbols]

 1 rotating table 2 supporting shaft 3 base 4 rotating plate 7 leg member 9 roller 12 drum

Claims (1)

[Claims] 1. A leg member (7) for supporting a base (3) above the ground and supporting it at three points is provided on the lower surface side of the base (3),
A support shaft (2) is erected on the upper surface side of the base (3) and a rotatable plate (4) rotatable around the support shaft (2) is provided, and the lower surface of the rotary plate (4) is provided with three points. A rotary table for drawing out a wire rod, wherein three supporting rollers (9) are arranged on the upper surface side of the base (3).