Manufacturing equipment for coated pipes

Abstract

To provide a novel coated pipe manufacturing apparatus.SOLUTION: There is provided a coated pipe manufacturing apparatus for forming a coated pipe by pulling and moving a corrugated pipe 7 to a pipe passing position by a second slider 18 and inserting an end of a pipe 8 into the straight corrugated pipe 7 arranged at the pipe passing position from an end of the corrugated pipe 7, wherein a belt conveyor 3 is provided to assist a movement of the coated pipe to the pipe passing position, and the second slider 18 lifts the end of the corrugated tube 7 to move the corrugated tube 7 in a state where the tube is lifted above the belt conveyor 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0004] , ,

[0001] The present invention relates to an apparatus for manufacturing a coated pipe.

Background Art

[0002] Coated pipes are used in building water supply and hot water supply systems. As such coated pipes, for example, those shown in Patent Document 1 are known. The coated pipe is formed by passing a pipe through a corrugated pipe. By using such a coated pipe in a water supply and hot water supply system, it is possible to suppress damage to the pipe during construction of the water supply and hot water supply system.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a novel apparatus for manufacturing a coated pipe.

Means for Solving the Problems

[0005] In order to achieve the above object, the apparatus for manufacturing a coated pipe according to claim 1 pulls and moves a corrugated pipe to a pipe-passing position by a slider, and inserts an end portion of a pipe from an end portion of the corrugated pipe with respect to the linear corrugated pipe disposed at the pipe-passing position to form a coated pipe, and a belt conveyor for assisting the movement of the corrugated pipe to the pipe-passing position is disposed, and the slider moves the corrugated pipe in a state of lifting an end portion of the corrugated pipe and floating it from the belt conveyor. 1 端部からパイプの端部を挿入することによって被覆付パイプを形成する被覆付パイプの製造装置であって、前記コルゲート管の前記通管位置への移動を補助するベルトコンベアが配置されており、前記スライダは、前記コルゲート管の 2nd 端部を持ち上げて前記ベルトコンベアから浮かせた状態で前記コルゲート管を移動させる。

Brief Description of the Drawings

[0006] [Figure 1] A schematic diagram showing a manufacturing apparatus for coated pipes. [Figure 2] A schematic diagram showing the device's elongation prevention mechanism as viewed from above. [Figure 3] Cross-sectional view showing the first and second sliders. [Figure 4] A cross-sectional view showing how the first slider moves. [Figure 5] A cross-sectional view showing how the first slider moves. [Figure 6] A cross-sectional view showing how the first slider moves. [Figure 7] A cross-sectional view showing the connection between the air supply device and the second slider. [Figure 8] A cross-sectional view showing the movement of a covered pipe when it is removed from the manufacturing equipment. [Modes for carrying out the invention]

[0007] Hereinafter, an embodiment of a manufacturing apparatus and manufacturing method for coated pipes will be described with reference to Figures 1 to 8. As shown in Figure 1, the apparatus for manufacturing coated pipes includes a first station 1, a second station 2, a belt conveyor 3, a guide rail 4, and an elongation prevention mechanism 5.

[0008] Station 1 is where the workers who operate the coated pipe manufacturing equipment are located. The workers perform the manual tasks necessary for manufacturing coated pipes using the equipment. Station 1 is equipped with an operation panel 6 for operating the coated pipe manufacturing equipment. The operation panel 6 is operated by the workers. Corrugated pipes 7 and pipes 8 necessary for manufacturing coated pipes are transported to Station 1. Station 1 is equipped with a vacuum device 9 for sucking air out of the corrugated pipes 7.

[0009] The second station 2 is located at a distance from the first station 1. The second station 2 is equipped with an air supply device 10 for supplying air into the corrugated pipe 7. The second station 2 is equipped with a drum 12. A wire 11, which is a cable-like material, is connected to the drum 12. The drum 12 is capable of winding up the wire 11 and is equipped with an encoder 13 for detecting the amount of wire 11 wound up. The wire 11 passes through the air supply device 10 and extends into the corrugated pipe 7. The second station 2 is also equipped with a proximity sensor 14. The proximity sensor 14 is for detecting when the end of the pipe 8 reaches the second station 2.

[0010] The belt conveyor 3 and guide rail 4 are arranged to extend horizontally between the first station 1 and the second station 2. The belt conveyor 3 is equipped with a belt 17 wrapped around rollers 15 and 16. The belt conveyor 3 switches the rotation of the belt 17 between forward and reverse by switching the rotation direction of the rollers 15 and 16. Above the belt conveyor 3, the guide rail 4 extends parallel to the belt conveyor 3. The belt conveyor 3 and guide rail 4 are used to move corrugated pipes 7, which have been transported to the first station 1, from the first station 1 to the second station 2 during the manufacturing of coated pipes.

[0011] When the corrugated pipe 7 reaches the second station 2 due to the above movement, the corrugated pipe 7 extends in a straight line from the first station 1 to the second station 2. Hereinafter, this position of the corrugated pipe 7 will be referred to as the "pipe passage position". When the corrugated pipe 7 is positioned in the pipe passage position, the first end of the corrugated pipe 7 (the right end in Figure 1) is located at the first station 1, and the second end of the corrugated pipe 7 (the left end in Figure 1) is located at the second station 2.

[0012] When a corrugated pipe 7 is transported to the first station 1 during the manufacturing of a covered pipe, the second end of the corrugated pipe 7 is located at the first station 1. Hereinafter, this position of the corrugated pipe 7 will be referred to as the "preparation position". During the manufacturing of a covered pipe, the corrugated pipe 7 is moved from the preparation position to the pipe insertion position. The pipe 8 that has been transported to the first station 1 is inserted into the corrugated pipe 7, which is positioned at the pipe insertion position, from its first end. By passing the pipe 8 through the corrugated pipe 7, a covered pipe is formed.

[0013] The apparatus for manufacturing coated pipes includes a first slider 19 and a second slider 18. The first slider 19 is positioned inside the corrugated pipe 7. The first slider 19 is capable of moving within the corrugated pipe 7 in the longitudinal direction of the corrugated pipe 7. The first slider 19 can be connected to the end of the pipe 8.

[0014] The second slider 18 is equipped with an arm 20 for suspending it from the guide rail 4. The arm 20 is fitted with wheels 21 that roll along the guide rail 4. The guide rail 4 supports the weight of the second slider 18 via the wheels 21 and the arm 20. The second slider 18 is then able to move along the guide rail 4. This movement of the second slider 18 follows the path of movement of the first slider 19 within the corrugated pipe 7.

[0015] The second slider 18 can be connected to the second end of the corrugated pipe 7. Therefore, the second slider 18 is positioned closer to the second end than the first slider 19. The end of a wire 11 extending from the drum 12 is connected to the first slider 19. This wire 11 passes through the second slider 18. The first slider 19 and the second slider 18 can come into contact with each other and separate from each other along the movement path of the first slider 19.

[0016] Specifically, when the first slider 19 and the second slider move relative to each other in a direction approaching each other, the first slider 19 and the second slider are configured to abut against each other. When the first slider 19 and the second slider abut against each other, the relative movement between the two is prohibited. On the other hand, the first slider 19 and the second slider are configured to allow relative movement in a direction away from each other. For this reason, the first slider 19 and the second slider 18 when in contact with each other can move relative to each other in a direction away from each other.

[0017] When the second slider 18 is moved to the second station 2, the second slider 18 is connected to the air supply device 10. At this time, air can be supplied from the air supply device 10 into the corrugated tube 7 via the second slider 18. Also, at the first station 1, it is possible to connect the vacuum device 9 to the first end of the corrugated tube 7. When the air in the corrugated tube 7 is sucked out by this vacuum device 9 and air is supplied from the air supply device 10 into the corrugated tube 7 connected to the second slider 18, the first slider 19 in the corrugated tube 7 moves toward the first end by the air pressure in the corrugated tube 7.

[0018] The air supply device 10 and the vacuum device 9 serve as a first driving device that moves the first slider 19 in the corrugated tube 7 from the second end to the first end by supplying fluid pressure (in this example, air pressure) into the corrugated tube 7. The drum 12 serves as a second driving device that moves the first slider 19 in the corrugated tube 7 from the first end to the second end by winding up the wire 11, thereby pulling the pipe 8 connected to the first slider 19 and passing it through the corrugated tube 7. Further, the corrugated tube 7 connected to the second slider 18 is pulled toward the pipe passing position when the driving force of the drum 12 when winding up the wire 11 is transmitted to the second slider 18 via the wire 11 and the first slider 19 under the condition that the first slider 19 and the second slider 18 are in contact with each other.

[0019] Between the first station 1 and the second station 2 in the manufacturing apparatus for the coated pipe, a plurality of the anti-elongation mechanisms 5 are provided at predetermined intervals along the belt conveyor 3 and the guide rail 4.

[0020] FIG. 2 shows the state of the anti-elongation mechanism 5 as viewed from above in FIG. 1. The anti-elongation mechanism 5 includes a base member 22 and a clamp 23. The base member 22 can be moved in the extending direction of the belt conveyor 3 by an actuator such as an air cylinder. The clamp 23 is supported by the base member 22 and can move integrally with the base member 22. The clamp 23 is located on both sides in the width direction (the vertical direction in FIG. 2) of the belt conveyor 3.

[0021] The clamp 23 can approach and separate from the corrugated pipe 7 on the belt 17. By approaching the clamp 23 to the corrugated pipe 7, the corrugated pipe 7 is clamped by the clamp 23. By moving the base member 22 in the extending direction of the belt conveyor 3 in this state, the corrugated pipe 7 can be pulled in the extending direction of the belt conveyor 3. Also, by separating the clamp 23 from the corrugated pipe 7, the corrugated pipe 7 clamped by the clamp 23 is released.

[0022] Next, the second slider 18 and the first slider 19 will be described in detail. As shown in FIG. 3, the second slider 18 has a mounting hole 24 extending in the horizontal direction and a small-diameter portion 25 for reducing the inner diameter of the mounting hole 24. The end of the corrugated pipe 7 is inserted from one end of the mounting hole 24. The second end of the corrugated pipe 7 can be fixed inside the mounting hole 24. The end of the mounting hole 24 on the opposite side to the fixing position of the corrugated pipe 7 is an air supply port 26 that can be connected to the air supply device 10.

[0023] A first slider 19 is positioned inside the corrugated pipe 7, which is fixed to the second slider 18. In Figure 3, the first slider 19 is located at the second end of the corrugated pipe 7 and is adjacent to the small diameter section 25. A wire 11 is connected to the first slider 19. The wire 11 passes inside the air supply port 26 and also inside the small diameter section 25. On the surface of the first slider 19 opposite to the surface to which the wire 11 is connected, a threaded portion 19a with a male thread is provided.

[0024] The relative movement of the first slider 19 to the left in Figure 3 relative to the second slider 18 is prevented by the contact of the first slider 19 with respect to the small diameter portion 25. On the other hand, the relative movement of the first slider 19 to the right in Figure 3 relative to the second slider 18 is permitted by the separation of the first slider 19 from the small diameter portion 25. This movement of the first slider 19 is accomplished by passing through the inside of the corrugated pipe 7.

[0025] Figures 4-6 show how the first slider 19 moves. As shown in Figure 4, when the air supply port 26 of the second slider 18 is connected to the air supply device 10 of the second station 2, the first slider 19 moves as follows: that is, the supply of air from the air supply device 10 and the suction of air by the vacuum device 9 (Figure 5) cause the first slider 19 to move in the direction that feeds the wire 11 out of the drum 12 (Figure 1) (to the right in Figure 4).

[0026] Due to the movement of the first slider 19 caused by the air pressure inside the corrugated pipe 7, as shown in Figure 5, the first slider 19 reaches the first end of the corrugated pipe 7 located at the first station 1. The vacuum device 9 can be removed from the first end of the corrugated pipe 7. With the vacuum device 9 removed from the first end of the corrugated pipe 7 in this state, it becomes possible to remove the first slider 19 from the first end of the corrugated pipe 7.

[0027] The first slider 19 can be connected to the end of the pipe 8, as shown in Figure 6. Specifically, the first slider 19 is connected to the end of the pipe 8 by fixing a connecting jig 27 to the end of the pipe 8 and screwing the threaded portion 19a of the first slider 19 to the connecting jig 27. In this state, the first slider 19 is moved to the left in Figure 6 together with the connecting jig 27 and the pipe 8 by winding the wire 11 on the drum 12 (Figure 1).

[0028] Next, we will explain the manufacturing method for coated pipes. In this manufacturing method, a coated pipe is formed by sequentially performing each step using the coated pipe manufacturing apparatus described above, namely the first, second, third, fourth, fifth, and sixth steps. The first to sixth steps of the above manufacturing method will be described in detail below.

[0029] [1st step] In this process, the corrugated pipes 7 and pipes 8 necessary for manufacturing the coated pipes are transported to the first station 1 (Figure 1). At this time, the corrugated pipes 7 are in the preparation position before being moved to the pipe insertion position. The worker at the first station 1 connects the second slider 18 to the second end of the corrugated pipe 7, as shown in Figure 3. More specifically, the first slider 19 is inserted into the corrugated pipe 7 from the second end. Furthermore, its second end is fixed to the mounting hole 24 of the second slider 18. In other words, the second slider 18 is connected to the second end of the corrugated pipe 7, which is in the preparation position.

[0030] [Second process] In this process, the operator drives the drum 12 and the belt conveyor 3 by operating the control panel 6 shown in Figure 1. As a result, the drum 12 winds up the wire 11, and the belt 17 of the belt conveyor 3 rotates in the forward direction (counterclockwise direction in Figure 1). The winding of the wire 11 by the drum 12 transmits the driving force of the drum 12 to the second slider 18 via the wire 11 and the first slider 19. As a result, the corrugated pipe 7 connected to the second slider 18 is pulled from the preparation position to the pipe insertion position. In this way, the corrugated pipe 7 moves together with the second slider 18 and the first slider 19 until it reaches the pipe insertion position.

[0031] The movement of the corrugated pipe 7 to the pipe passage position described above is assisted by the rotation of the belt 17 in the forward direction. The rotational speed of the belt 17 at this time may be set to be slightly faster than the movement speed of the second slider 18 and the first slider 19. However, it is not necessary to set the rotational speed of the belt 17 in this way; for example, the rotational speed of the belt 17 may be equal to the movement speed of the second slider 18 and the first slider 19. As described above, by rotating the belt 17 in the forward direction, friction between the corrugated pipe 7 and the belt 17 is reduced, thereby preventing the corrugated pipe 7 from being pulled in the opposite direction of movement due to this friction.

[0032] The positions of the second slider 18 and the first slider 19 during the movement of the corrugated pipe 7 change according to the amount of wire 11 wound on the drum 12. Therefore, the positions of the second slider 18 and the first slider 19 can be determined based on the amount of wire 11 wound on, as detected by the encoder 13. As shown in Figure 4, when the second slider 18 and the first slider 19 reach the second station 2, the air supply port 26 of the second slider 18 is connected to the air supply device 10 of the second station 2. The second slider 18 and the first slider 19 are stopped at the position where the air supply port 26 was connected to the air supply device 10. That is, the drive of the drum 12 and the drive of the belt conveyor 3 are stopped.

[0033] [3rd step] As described above, when the second slider 18 stops while connected to the air supply device 10, that is, when the corrugated pipe 7 moves to the pipe passage position, the corrugated pipe 7 extends from the first station 1 to the second station 2.

[0034] In this process, an operator at the first station 1 (Figure 1) connects a vacuum device 9 to the first end of the corrugated pipe 7 and operates the control panel 6 to drive the vacuum device 9 and the air supply device 10. As a result, the vacuum device 9 sucks out the air from inside the corrugated pipe 7, and air from the air supply device 10 is supplied into the corrugated pipe 7 connected to the second slider 18, as shown in Figure 4. Consequently, the first slider 19 moves from the second end to the first end of the corrugated pipe 7 due to the air pressure inside the corrugated pipe 7. In other words, the first slider 19 moves in the direction that feeds the wire 11 from the drum 12 (to the right in Figure 4). At this time, the first slider 19 moves relative to the second slider 18 in a direction away from it.

[0035] As shown in Figure 5, when the first slider 19 reaches the first end of the corrugated pipe 7 located at the first station 1, the operator operates the control panel 6 (Figure 1) to stop the vacuum device 9 and the air supply device 10. After that, the operator removes the vacuum device 9 from the first end of the corrugated pipe 7, exposing the first slider 19.

[0036] [4th step] In this process, the worker connects the first slider 19 to the end of the pipe 8 at the first end of the corrugated pipe 7, as shown in Figure 6. More specifically, the first slider 19 is connected to the end of the pipe 8 by fixing a connecting jig 27 to the end of the pipe 8 and screwing the threaded portion 19a of the first slider 19 to the connecting jig 27.

[0037] [5th ​​step] In this process, the operator drives the drum 12 by operating the control panel 6 (Figure 1). This causes the wire 11 to be wound onto the drum 12. As a result, the first slider 19 moves along the centerline of the corrugated pipe 7 toward the second end of the corrugated pipe 7 (second slider 18), as shown in Figure 6. The first slider 19, moving in this manner, pulls the pipe 8 and passes it through the corrugated pipe 7. The position of the first slider 19 at this time can be determined based on the amount of wire 11 wound up, which is detected by the encoder 13.

[0038] As the first slider 19 passes through the corrugated pipe 7, friction between the two causes the corrugated pipe 7 to be pulled in the direction of movement of the first slider 19. As a result, the position of the corrugated pipe 7 shifts towards the second station 2 (to the left in Figure 1). To return the position of the corrugated pipe 7 to its original position, the stretch prevention mechanism 5 shown in Figure 2 is activated.

[0039] More specifically, when the first slider 19 inside the corrugated pipe 7 passes the position corresponding to the clamp 23 (solid line) of the stretch prevention mechanism 5, the clamp 23 is brought closer to the corrugated pipe 7 as shown by the dashed line, so that the corrugated pipe 7 is clamped by the clamp 23. Furthermore, by moving the base member 22 toward the first station 1 (to the right in Figure 2) in this state, the corrugated pipe 7, which has shifted position due to the passage of the first slider 19, is returned to its original position.

[0040] As shown in Figure 7, when the first slider 19 moves until it contacts the small-diameter portion 25 of the second slider 18 located at the second station 2, the proximity sensor 14 (Figure 1) at the second station 2 detects the connecting jig 27 fixed to the end of the pipe 8. Based on this detection, the drive of the drum 12 is stopped. In this way, the pipe 8 is passed through the corrugated pipe 7, and a covered pipe is formed.

[0041] [6th step] In this process, an operator at the first station 1 operates the control panel 6 (Figure 1) to drive a conveying device (not shown) for removing the coated pipe from the manufacturing equipment, and also drives the belt conveyor 3. At this time, the belt 17 rotates in the reverse direction (clockwise rotation direction in Figure 1). As shown in Figure 8, the coated pipe moves from the pipe insertion position to the preparation position due to the operation of the conveying device. The movement of the coated pipe at this time is assisted by the rotation of the belt 17 in the reverse direction. This reduces friction between the corrugated pipe 7 and the belt 17, and prevents the corrugated pipe 7 from being pulled in the opposite direction to the direction of movement due to this friction.

[0042] The movement of the covered pipe from the pipe-passing position to the preparation position is performed with the first slider 19 connected to the pipe 8 and the second slider 18 connected to the second end of the corrugated pipe 7. As a result, the wire 11 is unfurled from the drum 12 and the second slider 18 moves to the first station 1. The next corrugated pipe 7 is transported to the preparation position of the first station 1. Therefore, by moving the second slider 18 to the first station 1 as described above, the second slider 18 is pre-positioned to be near the second end of the next corrugated pipe 7 that is transported to the preparation position.

[0043] As described above, when the covered pipe moves from the pipe passage position to the preparation position, the clamp 23 of the stretch prevention mechanism 5 shown in Figure 2 is separated from the corrugated pipe 7, and the corrugated pipe 7 that was being held by the clamp 23 is released. Furthermore, the base member 22 of the stretch prevention mechanism 5 moves from the position shown by the dashed line in Figure 2 to the position shown by the solid line. Then, when the second slider 18 and the first slider 19 reach the first station 1 (Figure 1), the conveying device and the drum 12 are stopped.

[0044] Subsequently, the worker at Station 1 removes the second slider 18 from the second end of the corrugated pipe 7 and the first slider 19 from the end of the pipe 8. This makes it possible to remove the formed coated pipe from the manufacturing equipment. Then, by repeating the first, second, third, fourth, fifth, and sixth steps described above, coated pipes are continuously manufactured.

[0045] Next, the operation and effects of the covering pipe manufacturing apparatus and manufacturing method in this embodiment will be described. (1) When passing a pipe through the corrugated pipe 7, the first slider 19 connected to the end of the pipe 8 moves along its centerline inside the corrugated pipe 7 as the wire 11 is wound up by the drum 12. Consequently, the end of the pipe 8 also moves along its centerline inside the corrugated pipe 7. This prevents the tip of the pipe 8 from contacting the inner wall of the corrugated pipe 7. Furthermore, this also prevents the corrugated pipe 7 from meandering due to such contact, thus preventing the pipe 8 from becoming clogged inside the corrugated pipe 7 as a result of the meandering. Therefore, when passing the pipe 8 through the corrugated pipe 7, there is no need to take the time to clear the clog, and the decrease in the manufacturing efficiency of coated pipes due to this time is suppressed.

[0046] (2) Workers who manufacture coated pipes can manufacture coated pipes simply by operating the control panel 6 of the first station 1 to operate the manufacturing equipment while performing manual work to manufacture coated pipes at the first station 1. This reduces the number of workers required to manufacture coated pipes.

[0047] (3) When the first slider 19 passes through the corrugated pipe 7, friction between the two causes the corrugated pipe 7 to be pulled in the direction of movement of the first slider 19, and the position of the corrugated pipe 7 shifts towards the second station 2. This displacement of the corrugated pipe 7 can be corrected by the stretch prevention mechanism 5. In other words, the corrugated pipe 7, which has shifted position due to the passage of the first slider 19, can be returned to its original position by the operation of the stretch prevention mechanism 5.

[0048] The above embodiment can also be modified as follows, for example. The above embodiment and the following modifications can be combined and implemented to the extent that they do not contradict each other technically. - Of the air supply device 10 and vacuum device 9, which serve as the first drive device, the vacuum device 9 may be omitted.

[0049] • Although air pressure was used as an example of the fluid pressure used to move the first slider 19, other fluid pressures may also be used. Although an air supply device 10 and a vacuum device 9 that move the first slider 19 by air pressure have been given as an example of a first drive device, a first drive device that moves the first slider 19 by magnetic force or the like may be used instead.

[0050] • Although wire 11 was used as the cord-like material, other materials may also be used. The corrugated pipe 7, which is fed out of the corrugated pipe manufacturing equipment, may be moved directly to the pipe insertion position without using a conveying device or the like. In this case, it is conceivable that the second slider 18 of the first slider 19 and the second slider 18 may be omitted, and only the first slider 19 may be used as the slider.

[0051] In this configuration, as described above, the slider (first slider 19) is inserted from the second end of the corrugated pipe 7, which is positioned in the pipe passage location. This slider is moved from the second end to the first end of the corrugated pipe 7 by air pressure and connected to the end of the pipe 8, which is in the preparation position. Subsequently, the wire 11 is wound up by the drum 12, moving the slider from the first end to the second end inside the corrugated pipe 7, thereby pulling the pipe 8 connected to the slider and passing it through the corrugated pipe 7.

[0052] By passing the pipe 8 through the corrugated pipe 7 in this manner, a covered pipe is formed. After formation, the covered pipe is transported outside the manufacturing apparatus with the slider removed from the pipe 8. By repeating the procedure described above, covered pipes are continuously manufactured.

[0053] Next, we will describe the technical concept that can be understood from the above embodiment. In a covered pipe manufacturing apparatus, which forms a covered pipe by inserting the end of a pipe into a straight corrugated pipe positioned at the pipe passage location, A cord-like body inserted into the corrugated pipe from the second end of the corrugated pipe, A slider is disposed inside the corrugated pipe, connected to the cord-like body, and capable of being connected to the end of the pipe, and is movable within the corrugated pipe in the longitudinal direction of the corrugated pipe. A first drive device that moves the slider from the second end to the first end within the corrugated pipe by supplying fluid pressure into the corrugated pipe, A second drive device that moves the slider from the first end to the second end within the corrugated pipe by winding up the cord-like body, thereby pulling the pipe connected to the slider and passing it through the corrugated pipe, A manufacturing apparatus for coated pipes equipped with the following features.

[0054] In this configuration, when a pipe is passed through a corrugated pipe, a slider connected to the end of the pipe moves along the centerline of the corrugated pipe due to the winding of a cable-like material by a second drive device. Consequently, the end of the pipe also moves along the centerline of the corrugated pipe. Therefore, contact between the tip of the pipe and the inner wall of the corrugated pipe is suppressed. Furthermore, since this suppresses the corrugated pipe from meandering due to such contact, it also suppresses the pipe from becoming clogged inside the corrugated pipe due to such meandering. Therefore, when passing a pipe through a corrugated pipe, there is no need to take the time to clear the clog, and the decrease in the manufacturing efficiency of coated pipes due to this time is suppressed.

[0055] (1) In a covered pipe manufacturing apparatus, in which a covered pipe is formed by inserting the end of a pipe into a straight corrugated pipe positioned at the pipe passage location, A cord-like body inserted into the corrugated pipe from the second end of the corrugated pipe, A first slider is disposed inside the corrugated pipe, connected to the cord-like body, and capable of being connected to the end of the pipe, and is movable inside the corrugated pipe in the longitudinal direction of the corrugated pipe. A first drive device that moves the first slider from the second end to the first end within the corrugated pipe by supplying fluid pressure into the corrugated pipe, A second drive device that moves the first slider from the first end to the second end within the corrugated pipe by winding up the cord-like body, thereby pulling the pipe connected to the first slider and passing it through the corrugated pipe, A second slider is positioned on the second end side of the corrugated pipe, closer to the second end than the first slider, and is capable of connecting to the second end, and is capable of moving along the movement path of the first slider. Equipped with, The first slider and the second slider are capable of contacting and separating from each other along the movement path of the first slider. A covering pipe manufacturing apparatus in which, when the first slider and the second slider are in contact, the driving force of the second drive device is transmitted to the second slider via the cable-like body and the first slider, thereby enabling the corrugated pipe connected to the second slider to be pulled and moved to the pipe passage position.

[0056] (2) A method for manufacturing a covered pipe using the manufacturing apparatus described in the technical concept (1), A first step is to connect the second slider to the second end of the corrugated pipe, which is in a preparation position before moving to the aforementioned pipe passage position, A second step involves the winding of the cord-like body by the second drive device after the first step, thereby pulling and moving the corrugated pipe from the preparation position to the pipe passage position, With the corrugated pipe positioned in the passage position as a result of the second step, the third step involves using the first drive device to move the first slider away from the second slider, thereby moving only the first slider to the first end of the corrugated pipe, and simultaneously unwinding the cord-like body from the second drive device. A fourth step involves connecting the end of the pipe to the first slider, which has been moved to the first end of the corrugated pipe by the third step, The fourth step involves moving the first slider, which is connected to the end of the pipe, to the second end of the corrugated pipe by winding the cord-like body by the second drive device, thereby pulling the pipe and passing it through the corrugated pipe to form a covered pipe. A sixth step involves moving the covered pipe formed in the fifth step from the pipe passage position toward the preparation position, while the first slider is connected to the pipe and the second slider is connected to the corrugated pipe, thereby pre-positioning the second slider to be located near the second end of the next corrugated pipe that will reach the preparation position, and simultaneously unwinding the cord-like body from the second drive device. A method for manufacturing a covered pipe equipped with a cover.

[0057] (3) A covering pipe manufacturing apparatus for forming a covering pipe, wherein a corrugated pipe is pulled and moved from a first station to a second station so that the corrugated pipe is aligned in a straight line between the first station and the second station and positioned at the pipe passage position, and at the first station, the end of a pipe is inserted from the end of the corrugated pipe at the pipe passage position, and the end of the pipe is brought to the second station, A manufacturing apparatus for coated pipes, wherein a belt conveyor for assisting the movement of the corrugated pipe to the pipe passage position is arranged from the first station to the second station.

[0058] (4) A covering pipe manufacturing apparatus comprising inserting the end of a pipe into a straight corrugated pipe positioned between a first station and a second station at the first station, and bringing the end of the pipe to the second station to form a covering pipe, and pulling the covering pipe to move it from the position where it was inserted, A manufacturing apparatus for coated pipes, wherein a belt conveyor for assisting the movement of the coated pipe from the pipe passage position is arranged from the first station to the second station. [Explanation of Symbols]

[0059] 1...First station, 2...Second station, 3...Belt conveyor, 4...Guide rail 5...Anti-extension mechanism, 6...Operation panel, 7...Corrugated pipe, 8...Pipe, 9...Vacuum 10... Air supply device, 11... Wire, 12... Drum, 13... Encoder, 14... Proximity sensor, 15... Roller, 16... Roller, 17... Belt, 18... Second slider, 19... First slider, 19a...screw part, 20...arm, 21...wheel, 22...base member, 23... Clamp, 24...Mounting hole, 25...Small diameter section, 26...Air supply port, 27...Connecting jig.

Claims

[Claim 1] A covering pipe manufacturing apparatus for forming a covering pipe, wherein a corrugated pipe is pulled and moved to a pipe passage position by a slider, and the end of the pipe is inserted into the straight corrugated pipe positioned at the pipe passage position from the first end of the corrugated pipe, A covering pipe manufacturing apparatus is provided, which includes a belt conveyor to assist in moving the corrugated pipe to the pipe passage position, and the slider lifts the second end of the corrugated pipe, suspending it from the belt conveyor while moving the corrugated pipe.

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