JPH09150457A - Strip like material delivery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To spirally wind a strip like material along the inner peripheral surface of an existing pipe without twisting the same. SOLUTION: A delivery drum 10 having a strip like material wound therearound is supported in a horizontal state in a rotatable manner by a rotary support 20 and the rotary support 20 is supported on a stand frame 30 so as to be capable of being rotated around a vertical shaft. The strip like material 41 is delivered from the delivery drum 10 by a pair of delivery rolls 16 and the number of rotations of the delivery rolls 16 is detected by an encoder 18. When it is detected that the strip like material is wound over a round on the basis of the length of the strip like material delivered by the delivery drum 10, a twist preventing motor 35 is driven and the rotary support 20 is rotationally driven so that the delivery drum 10 is allowed to make a round around the vertical shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing pipe for manufacturing a spiral pipe by supplying a strip (profile) into the existing pipe and spirally winding the strip inside the spiral pipe. The present invention relates to a device for feeding a strip-shaped body so as to sequentially supply the strip-shaped body.

[0002]

2. Description of the Related Art In order to rehabilitate an aging existing pipe, a strip (profile) is supplied into the existing pipe, and the strip is spirally wound inside the existing pipe to manufacture a spiral pipe. A method of lining the inner peripheral surface of an existing pipe with a spiral pipe has been developed. In such a method, when the strip-shaped body continuously supplied into the existing pipe is spirally wound in the existing pipe, the strip-shaped body is sequentially twisted. For this reason, it is necessary to sequentially eliminate the twist of the strip-shaped body wound in a spiral shape.

In Japanese Examined Patent Publication No. 3-11611, a coil wound so that a strip-shaped body is paid out is arranged concentrically in an existing pipe, and the strip-shaped body is spirally wound along the inner peripheral surface of the existing pipe. Disclosed is a method and an apparatus for preventing the twisting of a strip by rotating the coil once when the strip is wound in one round.

Further, in Japanese Patent Laid-Open No. 5-169539, a coil wound so that a belt-like body is paid out is disclosed.
Disclosed is a device that is arranged concentrically with an existing pipe so that it can be freely rotated in the existing pipe, and that a strip is spirally wound along the inner peripheral surface of the existing pipe. In this device, since the coil from which the strip is unwound can freely rotate, when the strip unwound from the coil is spirally wound along the inner peripheral surface of the existing pipe. Also, the coil is free to rotate, which prevents twisting of the spirally wound strip.

[0005]

[Patent Document 1] Japanese Patent Publication No. 3-11611
In the method and apparatus disclosed in the publication, when the strip is spirally wound at a constant speed, the diameter of the coil from which the strip is fed is successively reduced. For this reason, if the strip-shaped coil has a small diameter, the coil may rotate a plurality of times while the strip-shaped body makes one revolution along the inner peripheral surface of the existing pipe. As described above, when the coil is rotated a plurality of times, the band-shaped body may be twisted.

In the device disclosed in Japanese Patent Laid-Open No. 5-169539, the coil of the strip is rotated by the twisting force generated in the strip wound in a spiral shape. For this reason, if the weight of the coil changes due to the unwinding of the strip, or if the distance between the coil and the portion where the strip is spirally wound changes, the twisting force of the strip becomes accurate. Therefore, there is a possibility that the twist of the band-shaped body cannot be reliably eliminated.

Further, in the devices disclosed in both publications, since the coil for feeding the strip-shaped body is arranged in the existing pipe, the amount of the strip-shaped body brought into the existing pipe as a coil is limited, and the strip-shaped body is extended over a long distance. There is also a problem in that the coil cannot be wound in a spiral shape, and the strip-shaped coil must be frequently carried into the existing pipe.

The present invention solves such a problem, and an object of the present invention is to always and reliably eliminate twisting of a spirally wound strip, and to twist the strip. It is an object of the present invention to provide a strip feeding device that can be spirally wound over a long distance.

[0009]

According to a first aspect of the present invention, there is provided a belt-shaped body feeding device having a feeding drum around which the belt-shaped body is wound, and the belt-shaped body fed from the feeding drum is sequentially wound in a spiral shape. A belt-shaped body feeding device adapted to rotatably support the feeding drum and capable of rotating around a direction orthogonal to the axial direction of the feeding drum. And a detection means for detecting the length of the strip-shaped body that is delivered from the delivery drum, and a length equal to the length of the strip-shaped body that is spirally wound around the circumference is delivered from the delivery drum. Each time the detection means detects that the rotation support body is rotated once around the direction orthogonal to the axial direction of the feeding drum.

The belt-shaped body feeding device according to a second aspect of the present invention further includes a feeding roller for feeding the belt-shaped body from the feeding drum, and a drive means for rotating the feeding roller.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic front view showing an example of an embodiment of a strip feeding device of the present invention, and FIG. 2 is a schematic cross sectional view of the main part thereof.

The strip feeding device of the present invention comprises a strip 4
1 is a winding drum 10 wound in a coil shape, a rotation support 20 that supports the delivery drum 10 in a horizontal state so as to be rotatable about a horizontal axis, and the rotation support 20 is rotatable about a vertical axis. It has a gantry frame 30 for supporting.

As shown in FIG. 1, the strip feeding device has a strip 41 (profile) 41 made of synthetic resin wound in a coil shape, for example, an existing pipe 42 buried in the ground.
Used to supply. A forming roll 43 that moves in the axial direction of the existing pipe 42 while circling along the inner peripheral surface of the existing pipe 42 is disposed in the existing pipe 42, and the band-shaped body 41 supplied into the existing pipe 42 is disposed. Is the forming roll 4
3, the spiral winding is performed along the inner peripheral surface of the existing pipe 42. As a result, the inner peripheral surface of the existing pipe 42 is lined with the strip-shaped body 41 that is spirally wound.

As shown in FIG. 2, the feeding drum 10 is rotatably fitted to the inner cylinder 12 by an inner cylinder 12 fitted and fixed to a support shaft 11 and a bearing 13. And the outer cylinder 14 that has been formed. And
A side plate 15 is abutted on each end surface of the inner cylinder 12 and the outer cylinder 14. Each side plate 15 is formed of a disk having an outer diameter larger than that of the outer cylinder 14, and each side plate 15 is arranged concentrically with the outer cylinder 14. Support shaft 1 passing through the axial center of the feeding drum 10.
1 is in a state of penetrating each side plate 15 and extending outward. A band 41 made of synthetic resin is wound around the outer cylinder 14 in a coil shape between the side plates 15. Band 41
Has one end fixed to the outer cylinder 14,
It is in a state of being wound in a coil shape along the axial direction of.

A pair of feeding rolls 16 are rotatably installed between the outer peripheral edges of the side plates 15 in a horizontal state parallel to the support shaft 11. The respective feeding rolls 16 are arranged in parallel in the radial direction of the outer cylinder 14 with an appropriate gap allowing the band-shaped body 41 to pass therethrough. One of the feeding rolls 16 is configured to be rotationally driven by a feeding motor 17 having a variable rotation speed attached to the outer surface of one side plate 15, and the strip-shaped body 41 wound around the outer cylinder 14 is When the feeding roll 16 is driven to rotate, the feeding roll 16 is sandwiched between the feeding rolls 16 and is forcedly fed from the outer cylinder 14. When the strip-shaped body 41 is forcibly delivered from the outer cylinder 14 by the two delivery rolls 16, the outer cylinder 14 is rotated by the delivery of the strip-shaped body 41.

The delivery motor 17 is provided with an encoder 18 for detecting the number of rotations of the delivery motor 17. The output of the encoder 18 is the counter 38
Is provided to the feeding roll 16 based on the number of rotations of the feeding motor 17 by the counter 38.
The number of rotations of is counted. Then, based on the rotation speed of the feeding roll 16, the feeding roll 1
The feeding length of the strip-shaped body 41 fed from 6 is obtained.

The rotary support 20 for supporting the feeding drum 10 is rotatably supported by a gantry frame 30 placed on the ground. The rotary support 20 includes a horizontal disc-shaped support plate 21 provided at the upper end portion, and a pair of hanger members 22 having the upper end portion attached to the support plate 21 and suspended vertically. There is. A sprocket 24 is horizontally provided at the center of the upper surface of the support plate 21.

The pair of hanger members 22 are attached to the outer peripheral edge of the support plate 21 so as to face each other along the radial direction of the support plate 21. At the lower end of each hanger member 22, each end of the support shaft 11 of the feeding drum 10 extending from the side plate 15 is supported.

A frame 3 for supporting the rotary support 20.
0 is placed on the ground and is appropriately fixed to the ground by anchor bolts or the like. The gantry frame 30 is provided with a plurality of columns 31 in a vertical state, and each column 31 constitutes a rectangular parallelepiped frame. A ring-shaped guide portion 3 is provided at the upper end of each of the columns 31.
2 is fixed in a horizontal state, and in this guide portion 32,
Through the bearing 33, the horizontal support plate 21 of the rotary support 20 that supports the feeding drum 10 is rotatably supported about the vertical axis. Each hanger member 22 attached to the support plate 21 in a suspended state is inserted through the ring-shaped guide portion 32.

A top plate 34 is horizontally supported by the ring-shaped guide portion 32 so as to cover the rotary support 20.
A twist prevention motor 35 that rotationally drives the rotary support 20 is attached to the top plate 34 at an eccentric position with respect to the center of the top plate 34 with the output shaft facing downward.
The output shaft of the twisting prevention motor 35 is in a state of penetrating the top plate 34, and a sprocket 36 is attached to a lower end portion extending below the top plate 34. And
A chain 25 is wound between the sprocket 36 and a sprocket 24 provided in the central portion of the upper surface of the support plate 21, so that the rotation of the anti-twist motor 35 is transmitted to the support plate 21 by the chain 25. It has become.

The twisting prevention motor 35 is provided with a control section 37 for controlling the driving of the motor 35. In order to obtain the length of the strip-shaped body 41 fed from the feeding roll 16, the control section 37 is provided. The output of the counter 38 provided in the. The control unit 37 controls the drive of the twisting prevention motor 35 based on the number of rotations of the feeding roll 16 counted by the counter 38. When the strip-shaped body 41 having a length corresponding to the circumference of one round when the strip-shaped body 41 is spirally wound along the inner peripheral surface of the existing pipe 42 is delivered to the counter 38 by the delivery roll 16, The rotation speed of the payout roll 16 required for the above is set in advance as a standard length set value, and when the rotation speed of the payout roll 16 reaches the standard length set value, the controller 37 is provided with a twist prevention function. A signal for rotating the motor 36 is output.

The strip feeding device having such a structure is
It works as follows. When the feeding motor 17 is rotationally driven in synchronization with the revolving speed of the forming roll 43 arranged in the existing pipe 42, the strip 41 wound around the feeding drum 10 is fed at a predetermined speed. Then, the belt-like body 41 fed from the feeding drum 10
Is supplied into the existing pipe 42, and is formed into a spiral pipe along the inner peripheral surface of the existing pipe 42 by the forming roll 43.

When the strip-shaped body 41 is spirally wound around the inner peripheral surface of the existing pipe 42 for one round, the strip-shaped body 41 is formed.
Is fed from the belt-shaped body feeding device 10 and the existing pipe 4
In the part supplied in 2, it becomes twisted over 360 degrees.

The rotation speed of the feeding motor 17 for driving the feeding roll 43 is detected by the encoder 18 and given to the counter 38. The counter 38 counts the number of rotations of the feeding roll 16 on the basis of the number of rotations of the feeding motor 17, and when the number of rotations of the feeding roll 16 becomes equal to a preset fixed length set value, It is determined that the unwound strip 41 is spirally wound in the existing pipe 42 for one round, and the control unit 37 outputs a signal for rotationally driving the twist prevention motor 35. .
This signal drives the twist prevention motor 35 to rotate.

The output of the twisting prevention motor 35 is the sprocket 36, the chain 25, and the sprocket 24.
Is transmitted to the support plate 21 of the rotary support body 20 via the, and the twisting prevention motor 35 is rotationally driven to rotate the support plate 21 in a horizontal state about a vertical axis. The anti-twist motor 35 moves the support plate 21
The feeding drum 10 is rotated only by rotation, and is horizontally supported by the pair of hanger members 22 attached to the support plate 21, and is rotated once around the vertical axis.

In this case, the rotation of the payout drum 10 about the vertical axis is in the direction to eliminate the twist of the belt-like body 41 twisted over 360 degrees. Then, when the support plate 21 makes one rotation, the rotation driving of the twist prevention motor 35 is stopped.

Thereafter, in the same manner, the pay-out roll 16
Each time the strip-shaped body 41 that is delivered by the above-mentioned is spirally wound around the existing pipe 42 for one round, the delivery drum 10 is rotated once around the vertical axis, and the strip-shaped body 41 is rotated.
The twist of the is eliminated.

[0029]

As described above, the strip feeding device according to the present invention provides a strip-shaped body wound around the strip-shaped body each time when the strip-shaped body is spirally wound around the strip-shaped body. Since the feeding drum is rotated once around the direction orthogonal to the axial direction thereof, the belt-like body is sequentially spirally wound without being twisted.
Since the feeding drum does not need to be arranged in the existing pipe, the amount of the strip wound around the feeding drum is not limited, and the strip can be spirally wound over a long distance. Therefore, the strip can be continuously wound in a spiral shape for a long time, and the working efficiency is significantly improved.

The band-shaped body wound on the feeding drum is pulled out by the winding force when it is wound in a spiral shape.
By forcibly rotating the delivery roll that delivers the strip from the delivery drum by the drive means, the delivery of the strip becomes smooth and the twisting of the strip is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an example of an embodiment of a strip feeding device according to the present invention.

FIG. 2 is a schematic cross-sectional view of a main part thereof.

[Explanation of symbols]

 10 Feeding Drum 11 Support Shaft 12 Inner Cylinder 13 Bearing 14 Outer Cylinder 15 Side Plate 16 Feeding Roll 17 Feeding Motor 18 Encoder 20 Rotating Support 21 Support Plate 22 Hanger Member 24 Sprocket 25 Chain 30 Stand Frame 31 Strut 32 Bearing 35 Motor for Torsion Prevention 38 Counter 41 Band 42 Existing Pipe 43 Forming Roll

Claims (2)

[Claims] 1. A belt-shaped body feeding device, comprising a feeding drum around which a belt-shaped body is wound, wherein the belt-shaped body fed from the feeding drum is sequentially wound in a spiral shape. A rotating support member that rotatably supports the drum and that can rotate about a direction orthogonal to the axial direction of the feeding drum, and a detection unit that detects the length of the strip-shaped member fed from the feeding drum. Each time the detection means detects that the length equal to the length in which the belt-like body is spirally wound around the circumference is unwound from the unwinding drum, the rotation supporter is provided. However, the belt-shaped body feeding device is characterized in that it is rotated once around a direction orthogonal to the axial direction of the feeding drum. 2. The belt-shaped body feeding drum according to claim 1, further comprising a feeding roller that feeds the belt-shaped body from the feeding drum, and a drive unit that rotates the feeding roller.