Apparatus and method for manufacturing belt-like member for pipe renovation

Abstract

To provide an apparatus for manufacturing a belt-like member for pipe renovation, which can prevent loosening of a winding roll caused by bouncing of a belt portion on a winding machine side from a cutter when the belt-like member for renovating an existing pipe is cut by the cutter on a feed line after extrusion molding, even if the belt-like member has high rigidity.SOLUTION: An extrusion molding unit 20 of an apparatus 1 for manufacturing a belt-like member for renovation extrudes and molds a long-sized belt-like member 10 made of synthetic resin, which forms a spiral renovation pipe. The molded belt-like member 10 is wound by a winding machine 29. A retention mechanism 30 is disposed between a cutter 23 on a feed line 1a extending from the extrusion molding unit 20 to the winding machine 29 and the winding machine 29, and the belt portion 18 of the belt-like member 10 on the winding machine 29 side from the cutter 23 is held by the retention mechanism 30 before the belt-like member 10 is cut by the cutter 23.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for producing a long strip-shaped member made of synthetic resin to be used as a spiral rehabilitation pipe, and more particularly to an apparatus and method suitable for producing a highly rigid strip-shaped member. [Background technology]

[0002] A method for rehabilitating an existing pipe, such as an aging sewer pipe, by lining the inner wall of the existing pipe with a rehabilitation pipe is known (see Patent Document 1, etc.). The rehabilitation pipe is composed of, for example, a long strip-shaped member made of synthetic resin. The strip-shaped member integrally includes a flat main strip portion, a plurality of reinforcing ridge portions provided on the back surface of the main strip portion, and male and female mating portions formed on both edges of the main strip portion in the width direction. Generally, the reinforcing ridge portions are formed with a T-shaped cross section. Patent Document 1 discloses a reinforcing ridge portion with a hollow rectangular cross section.

[0003] This type of strip-shaped member is continuously extruded from a synthetic resin raw material using an extruder (see Patent Document 2, etc.). A winder is provided at the end of a feed line extending from the extruder. The formed strip-shaped member is wound into a roll on the drum of the winder.

[0004] The winding roll of the belt-shaped material is carried to the rehabilitation construction site, and the belt-shaped material is successively unwound from the winding roll and wound spirally along the inner wall of the existing pipe to produce a helical rehabilitated pipe. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-031110 A (0004, FIG. 17) [Patent Document 2] JP 2021-091157 A (Figure 4) Summary of the Invention [Problem to be solved by the invention]

[0006] In production sites for this type of strip-shaped material, when the amount of strip-shaped material wound onto the winding drum of a winding machine reaches a specified level, the strip is cut by a cutter installed on the feed line and the drum is replaced. In the case of a typical strip-shaped material with a reinforcing ridge having a T-shaped cross section, even after the cutter cuts it, the portion of the strip from the cutter toward the winding machine remains almost stationary. On the other hand, a strip-shaped material having a hollow reinforcing ridge with a rectangular cross section, as disclosed in Patent Document 1, for example, has higher rigidity than typical strip-shaped materials. Therefore, according to the inventor's knowledge, the moment the portion of the strip from the cutter toward the winding machine is released by cutting, it bounces back toward the outer periphery of the winding roll, causing the wound portion of the winding roll connected to the strip portion to bulge toward the outer periphery, resulting in loosening of the winding. In view of the above circumstances, the present invention aims to prevent the band portion on the winding machine side from bouncing off from the cutting machine and causing loosening of the winding roll when the band-shaped member for rehabilitating existing pipes is cut by a cutting machine on a feed line that extrudes and winds up the band-shaped member, even if the band-shaped member has high rigidity. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a rehabilitating strip-shaped member production apparatus for producing a long strip-shaped member made of synthetic resin to be used as a spiral rehabilitating pipe, the apparatus comprising: an extrusion molding unit that extrudes the strip-shaped member; a winding machine that winds up the belt-shaped member; a cutter that cuts the strip-shaped material on a feed line extending from the extrusion molding unit to the winder; a holding mechanism disposed between the cutter and the winder, for holding a strip portion of the strip-shaped material from the cutter toward the winder; The present invention is characterized by the following.

[0008] In the rehabilitating strip-shaped material production apparatus, when the winding roll of the strip-shaped material on the winder reaches a specified amount, the strip-shaped material is cut on the feed line by a cutter. During cutting, the band portion from the cutter to the winder is held by a holding mechanism, which prevents the band portion from bouncing at the moment of cutting, even if the band member is highly rigid, and prevents the winding roll from becoming loose.

[0009] Preferably, the holding mechanism includes a pair of nipping rollers that nip the band portion from both sides in a direction perpendicular to the extension direction and width direction of the feed line. This reduces or prevents damage to the ribbon portion during holding. Furthermore, when winding up the cut ribbon portion, the clamping rollers are rotated, allowing the ribbon portion to be smoothly fed to the winding machine while still being held.

[0010] Preferably, the holding mechanism includes a reciprocating mechanism that moves the pair of nipping rollers toward and away from each other and applies a clamping force to the nipping rollers when they are close to each other. The pair of clamping rollers can be moved closer and farther away to clamp and hold the strip, or to release it. Furthermore, when the clamping rollers approach each other, they apply a clamping force to the strip, reliably preventing the strip from bouncing or the winding roll from loosening. By setting or adjusting the clamping force, it is possible to more reliably prevent the band portion from bouncing or the winding roll from loosening. The clamping force is preferably set or adjusted so that it is greater than the force that loosens the winding roll, but smaller than the force that the winding machine exerts on the band portion.

[0011] Preferably, the advancing and retracting mechanism includes a fluid pressure cylinder operated by a compressible working fluid. This allows the nipping rollers to be elastically pushed in the approaching direction, thereby applying an appropriate clamping force to the band portion. The fluid pressure cylinder is preferably an air cylinder with an air cushion function.

[0012] Preferably, at least one of the pinch rollers is provided with a rotation braking mechanism that applies a braking force to suppress rotation of the pinch roller. As a result, when cutting with the cutter, the rotation of the clamping rollers is suppressed by applying a braking force, so that the band portion can be reliably prevented from bouncing.

[0013] Preferably, when the operation of the winding machine is stopped, a braking force is applied by the rotation braking mechanism, When the winding machine is in operation, the braking force exerted by the rotation braking mechanism is released or weakened compared to when the operation is stopped. For example, when the cutter cuts the strip, the winder is stopped. In response, the rotation braking mechanism applies a braking force to the clamping rollers, suppressing their rotation. This reliably prevents the strip from bouncing off the winding roll during cutting, causing it to loosen. When the winding machine is subsequently operated to wind up the strip portion from the cutter to the winding machine side, the braking force of the rotation braking mechanism is released or relaxed compared to when the winding machine was stopped. This allows the clamping rollers to rotate, allowing the strip portion to be smoothly transported downstream along the feed line. By adjusting the degree of relaxation of the braking force, the strip portion can be introduced onto the winding roll while being pulled appropriately toward the upstream side of the feed line, reliably preventing slack on the winding roll when winding the strip portion.

[0014] Preferably, the rotary braking mechanism includes a powder brake. By controlling the current to the powder brake, it is possible to accurately apply and release the braking force or adjust the degree of relaxation.

[0015] Preferably, the outer circumferential surface of the pinch roller is provided with a soft covering material. This can prevent damage to the band portion. Examples of soft covering materials include foamed resins such as urethane. More preferably, the soft covering material has a high friction resistance against the strip-shaped member, which allows the strip to be held securely.

[0016] The method of the present invention is a method for producing a long strip-shaped member for rehabilitation made of synthetic resin to become a spiral rehabilitation pipe, comprising the steps of: extruding the strip-shaped member by an extrusion molding unit; a step of winding the formed belt-shaped member by a winding machine; a step of holding a strip portion of the strip-shaped material from the cutter to the winder by a holding mechanism disposed between the cutter and the winder on a feed line extending from the extrusion molding section to the winder; cutting the belt-shaped member with a cutting machine; The present invention is characterized by the following. [Effects of the Invention]

[0017] According to the present invention, when a strip-shaped member for rehabilitating an existing pipe is cut by a cutting machine on a feed line that extrudes and winds the strip-shaped member, even if the strip-shaped member has high rigidity, the strip portion on the winding machine side can be prevented from bouncing from the cutting machine, and loosening of the winding roll can be prevented. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a front view showing an apparatus for producing a strip-shaped member for rehabilitation according to an embodiment of the present invention in a state during normal production of a strip-shaped member. [Figure 2] FIG. 2 is a cross-sectional view of the belt-shaped member taken along line II-II in FIG. [Figure 3] 3 is a side cross-sectional view of the holding mechanism of the rehabilitating strip-shaped member production apparatus taken along line III-III in FIG. [Figure 4] FIG. 4 is a front view of the holding mechanism taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a front view showing a part of the belt-shaped member rehabilitating production apparatus in the stages from pre-cutting treatment to cutting of the belt-shaped member. [Figure 6] FIG. 6 is a front view showing a part of the rehabilitating strip-shaped member production apparatus at a post-cutting treatment stage. [Figure 7] FIG. 7 is an explanatory front view showing the state in which the belt-shaped member in FIG. 6 has been removed from the holding mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 shows the process of producing a long strip-shaped member 10 (profile) for rehabilitating an existing pipe. The material of the strip-shaped member 10 is a synthetic resin (raw material resin 10a) such as polyvinyl chloride.

[0020] As shown in Figure 2, the belt-shaped member 10 integrally includes a flat belt-shaped main band portion 11, a plurality of reinforcing ridges 12 provided on the back surface of the main band portion 11, and male and female mating portions 13, 14 formed on both widthwise edges of the main band portion 11. The cross-sectional shape of the reinforcing ridges 12 is formed into a hollow, approximately rectangular shape. The belt-shaped member 10 of this embodiment is thicker and more rigid than a typical belt-shaped member 10 having, for example, a reinforcing ridge with a T-shaped cross section.

[0021] Although detailed illustrations are omitted, the strip-shaped member 10 is used to rehabilitate existing pipes, such as aging sewer pipes. At this time, the strip-shaped member 10 is wound spirally so that the main band portion 11 faces the inner periphery (radially inward) and the reinforcing ridge portion 12 faces the outer periphery (radially outward), and the fitting portions 13, 14 are fitted together. In this way, the strip-shaped member 10 is manufactured into a spiral-shaped rehabilitated pipe. The rehabilitated pipe is lined against the inner wall of the existing pipe, thereby rehabilitating the existing pipe. The existing pipes to be rehabilitated are not limited to sewerage pipes, but may also be water supply pipes, agricultural water pipes, gas pipes, hydroelectric power generation water pipes, tunnels, etc.

[0022] As shown in Figure 1, a rehabilitating strip material production device 1 that produces a strip material 10 includes an extrusion molding section 20 that extrudes and molds the strip material 10, and a winder 29 that winds the molded strip material 10 onto a drum 28. An annular winding roll 19 made of the wound strip material 10 is formed on the outer periphery of a cylindrical drum body 28a of the drum 28. Preferably, the winder 29 can be remotely operated by a remote control device (not shown).

[0023] On the feed line 1a leading from the extrusion molding section 20 to the winding machine 29, there are provided, in order from the extrusion molding section 20 side, a cooling water tank 21, a take-up machine 22, a cutter 23, and a holding mechanism 30. The cutter 23 is for cutting the strip-shaped material 10 when the winding roll 19 on the outer periphery of the drum main body 28a reaches a specified amount.

[0024] A holding mechanism 30 is disposed between the cutter 23 and the winder 29. The holding mechanism 30 holds the strip portion 18 of the strip-shaped material 10 on the winder 29 side of the cutter 23 so that it can be transported downstream of the feed line 1a and be releasable.

[0025] 3 and 4, the holding mechanism 30 includes three (plural) pairs of cylindrical clamping rollers 31 and 32, a guide roller 35, an advancing / retreating mechanism 40, and a rotation braking mechanism 50. The upper clamping roller 31 and the lower two clamping rollers 32 face each other across the feed line 1a. These clamping rollers 31 and 32 are rotatably supported by a frame 39 of the holding mechanism 30. The axes of the clamping rollers 31 and 32 are oriented in the width direction (left-right direction in FIG. 3) perpendicular to the extension direction of the feed line 1a. The upper and lower sandwiching rollers 31 and 32 may be the same in number.

[0026] As shown in FIG. 1, the upper clamping roller 31 is disposed at a height midway between the height of the upper end of the flange 28f of the drum 28 and the height of the upper end of the drum body 28a. As shown in FIG. 4, the two lower clamping rollers 32 are disposed parallel to each other, aligned in the extension direction of the feed line 1a (the left-right direction in FIG. 4). In a planar projection view, the clamping roller 31 is disposed at a midpoint between the two clamping rollers 32. As shown in FIG. 3, the belt-shaped member 10 is passed between these clamping rollers 31, 32. The belt-shaped member 10 can be clamped from both the top and bottom by the clamping rollers 31, 32.

[0027] As shown in Figures 3 and 4, the roller body 33 of each of the clamping rollers 31, 32 is covered with a soft covering material 34. The outer circumferential surfaces of the clamping rollers 31, 32 are formed from the soft covering material 34. The soft covering material 34 is much softer than the roller body 33, which is made of a cylindrical metal such as steel. The frictional resistance of the soft covering material 34 against the belt-shaped member 10 is much greater than the frictional resistance of a metal such as steel. Examples of materials for the soft covering material 34 include foamed resins such as foamed polyurethane.

[0028] A guide roller 35 is provided on the front surface of the frame 39 of the holding mechanism 30 facing the upstream side of the feed line 1a.

[0029] The holding mechanism 30 includes an advancing / retracting mechanism 40 that moves the clamping rollers 31, 32 toward and away from each other. The advancing / retracting mechanism 40 includes, for example, an air cylinder 41 that raises and lowers the lower (one) clamping roller 32, and its control circuit and power supply circuit (not shown). The air cylinder 41 is operated by compressed air (compressible working fluid). Although not shown in detail, the air cylinder 41 preferably has an air cushion mechanism that applies an air cushion at the end of its stroke.

[0030] The upper (other) nipping roller 31 is fixed in position relative to the frame 39 . The advancing / retracting mechanism may raise and lower the upper (other) clamping roller 31, or may raise and lower both clamping rollers 31, 32 so as to move them closer to and away from each other.

[0031] 3, a rotation braking mechanism 50 is connected to the rotation shaft of the pinch roller 31 to apply a braking force that suppresses the rotation of the pinch roller 31. The rotation braking mechanism 50 preferably includes an electromagnetic powder brake 51 and its control circuit and power supply circuit (not shown). The application, release, or adjustment of the braking force is performed by controlling the current to the powder brake 51. The rotation braking mechanism 50 may be provided on at least one of the pinch rollers 31, 32, or may be provided on the pinch roller 32 or on both of the pinch rollers 31, 32.

[0032] Preferably, a control circuit is configured so that the winding machine 29 and the rotation control mechanism 50 are operated and stopped in conjunction with each other. More specifically, when the winding machine 29 stops operating, the rotation braking mechanism 50 operates to apply a braking force to the nipping roller 31. When the winding machine 29 is operating, the braking force of the rotation braking mechanism 50 is released or is weakened compared to when the winding machine 29 is stopped operating. In other words, when the drum 28 is stopped, the braking force of the powder brake 51 is strong, and when the drum 28 is rotating, the braking force of the powder brake 51 is not applied or is weakened.

[0033] The belt-shaped member 10 is produced by the belt-shaped member production apparatus 1 as follows. <Forming process> As shown in FIG. 1, in an extrusion molding section 20, a strip-shaped member 10 is continuously extruded from a synthetic resin raw material 10a. The formed strip-shaped member 10 is extruded from the extrusion molding section 20 along the feed line 1a, cooled in a cooling water tank 21, and then sent to the downstream side of the feed line 1a (the right side in Figure 1) by a take-up machine 22.

[0034] In addition, the strip-shaped material 10 from extrusion molding to passing through the cutting machine 23 is oriented so that the main strip portion 11 faces upward and the reinforcing ridge portion 12 faces downward, taking into account drainage and drying after passing through the cooling water tank 21 (Figure 2). During normal operation, the cutter 23c of the cutting machine 23 and the clamping rollers 31, 32 of the holding mechanism 30 are preferably retracted. The air cylinder 41 of the advancing / retracting mechanism 40 is contracted, and the clamping roller 32 is retracted to the lower retracted position.

[0035] <Winding process> The belt-shaped member 10 is turned upside down along the feed line 1a just before the winding machine 29 (on the left side in FIG. 1), so that the main belt portion 11 faces downward and the reinforcing ridge portion 12 faces upward (FIG. 3). The turned-over belt-shaped member 10 is sent to the upper end of the winding machine 29 and taken up onto the rotating drum 28, thereby forming a circular winding roll 19.

[0036] <Pre-cutting process> As shown in FIG. 5, when the winding roll 19 reaches a specified amount, the following pre-cutting process is carried out prior to cutting the belt-shaped member 10. <Winding stop process> First, the rotation of the drum 28 is stopped, thereby stopping the winding of the strip-shaped member 10.

[0037] <Holding process> As shown in Figure 5, in parallel with or before or after the winding is stopped, the clamping rollers 32 are raised from their retracted positions by the air cylinder 41. This brings the clamping rollers 31, 32 closer to each other, and the strip portion 18 of the strip-shaped material 10 on the feed line 1a from the cutter 23 to the winder 29 is pinched and held by the clamping rollers 31, 32. At this time, the air cushion mechanism of the air cylinder 41 elastically presses the clamping roller 32 against the strip-shaped material 10, thereby preventing damage to the strip-shaped material 10. Furthermore, the soft covering material 34 comes into contact with the strip-shaped material 10, thereby reliably preventing deformation and damage to the strip-shaped material 10. The timing of the execution of the holding step is not limited to simultaneous with or after the winding stopping step, but may be before the winding stopping step, which prevents the belt-shaped member 10 of the winding roll 19 from loosening and spreading out due to the drum 28 rotating in the reverse direction after the holding step.

[0038] <Braking process> In response to the rotation of the drum 28 being stopped, the powder brake 51 is activated to apply a braking force F to the pinch roller 31. This prevents the pinch roller 31 from rotating. Furthermore, the pinch roller 32, which pinches the belt-shaped member 10, is also prevented from rotating. By controlling the drum 28 and the powder brake 51 in a coordinated manner, the powder brake 51 can be activated almost simultaneously with the stopping of the drum 28. The powder brake 51 may be activated before or after the drum 28 stops rotating.

[0039] <Cutting process> 5, the cutter 23 is operated to cut the strip-shaped member 10 on the feed line 1a at the position of the cutter 23. As a result of the cutting, the strip portion 18 on the winder 29 side from the cutter 23 becomes the end portion of the strip-shaped member 10 that forms the winding roll 19.

[0040] Since the belt-shaped member 10 has high rigidity, the belt portion 18 tends to bounce back toward the outer periphery of the winding roll 19 at the moment of cutting, as shown by imaginary lines a→b→c in FIG. In contrast to this, as shown by the thick solid line in Figure 5, by holding the strip portion 18 between the clamping rollers 31, 32, it is possible to prevent the strip portion 18 from bouncing off. Moreover, because the rotation of the clamping rollers 31, 32 is prevented by the powder brake 51, it is possible to prevent the strip portion 18 from slipping off towards the take-up roll 19. Furthermore, a large frictional resistance acts between the soft covering material 34 on the outer periphery of each clamping roller 31, 32 and the strip portion 18, which further reliably prevents the strip portion 18 from slipping off. This prevents the wound portion 19a of the winding roll 19, which is continuous with the band portion 18, from expanding outward, and prevents the winding roll 19 from becoming loose.

[0041] <Post-cutting processing> Thereafter, as shown in FIG. 6, the drum 28 resumes rotation to wind up the strip portion 18. In response to the command to resume rotation of the drum 28, the powder brake 51 is deactivated and the braking force on the clamping roller 31 is released. This allows the clamping rollers 31 and 32 to rotate. Therefore, as the strip portion 18 is fed toward the winding roll 19, the clamping rollers 31 and 32 are rotated by rolling friction with the strip portion 18. As a result, the strip portion 18 can be smoothly transported toward the winding machine 29 and wound up while still held by the holding mechanism 30. At this time, the clamping force of the clamping rollers 31 and 32 by the air cylinder 41 is applied to the strip portion 18, so that tension acts on the strip portion 18 from the winding roll 19 to the clamping rollers 31 and 32. Therefore, the strip portion 18 can be prevented from loosening during winding, and the winding roll 19 can be prevented from loosening.

[0042] Instead of completely releasing the braking force of the powder brake 51, the braking force may be reduced to a level lower than that applied during cutting. This allows the clamping rollers 31, 32 to rotate, allowing the strip portion 18 to be wound up, and by applying tension to the strip portion 18, it is possible to reliably prevent the winding of the winding roll 19 from becoming loose. The braking force can be easily adjusted by controlling the current to the powder brake 51.

[0043] 7, the end portion 18e of the strip portion 18 formed by the cutting passes between the clamping rollers 31 and 32, and the entire strip portion 18 is released from the holding mechanism 20. At this time, the clamping roller 32 is raised by the cushioning force of the air cylinder 41 and comes into substantial contact with the clamping roller 31. Thereafter, the air pressure of the air cylinder 41 is released, and the clamping roller 32 is lowered to the retracted position.

[0044] Preferably, just before the end portion 18e passes between the clamping rollers 31 and 32, the binding rope 8 is tied to the band portion 18 on the take-up roll 19 side of the clamping rollers 31 and 32. When the end portion 18e passes between the clamping rollers 31 and 32, an operator may pull the binding rope 8 to prevent the take-up roll 19 from loosening. After the entire belt portion 18 has been wound up in this manner, the binding rope 8 is fastened to the flange 28f of the drum 28 or the like, thereby securing the end portion 18e to the winding roll 19. Thereafter, the drum 28 of the winder 29 is replaced, and the strip-shaped member 10 on the extrusion molding section 20 side (left side in FIG. 7) is sent from the cutter 23 to the winder 29 and wound onto a new drum (not shown).

[0045] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the belt-shaped member 10 is not limited to being made of synthetic resin only, and may include a reinforcing belt material made of metal such as steel. The holding mechanism 30 may be configured to hold the belt portion 18 without causing it to bounce, by only setting or adjusting the clamping force X of the clamping rollers 31 and 32, without applying a rotational braking force. In this case, the clamping force X is preferably set or adjusted to be greater than the force A with which the take-up roll 19 attempts to wind or unwind, greater than the force B with which the belt portion 18 attempts to escape toward the take-up roll 19 side, and less than the winding force C of the belt portion 18 by the winder 29 (A < B < X < C). By setting X < C, the clamping rollers 31 and 32 rotate by the force of turning the drum 28, and the belt-like member 10 is sent toward the take-up roll 19 side. The rotation braking mechanism 50 is not limited to the powder brake 51 and may include a brake shoe that can be controlled by voltage or the like. When the drum 28 stops, the braking force may be increased to hold the belt portion 18, and when the drum 28 rotates, the rotational speed of the clamping rollers 31 and 32 may be controlled to synchronize with the rotational speed of the drum 28. The holding mechanism 30 may have plate-shaped clamping members instead of the cylindrical clamping rollers 31 and 32. The plate-shaped clamping members may be moved toward the winder 29 while holding the belt portion 18.

[0046] The winding stop process before cutting may be omitted, or the winding speed may be decelerated. The holding process may be performed while rotating the drum 28. Further, the braking process before cutting may be omitted, or the braking force may be reduced. As pre-cutting processing, at least the holding process may be performed. The cutting process may be executed while rotating the drum 28 and slowly feeding the belt-like member 10. After the cutting process, before the end portion 18e passes between the clamping rollers 31 and 32, the braking process and the winding stop process may be performed. Moreover, the bundling rope 8 may be tied to the belt portion 18, or the belt portion 18 and the take-up roll 19 may be bundled with the bundling rope 8.

Industrial Applicability

[0047] The present invention is applicable, for example, to the production of regeneration materials for regenerating aged sewer pipes. [Explanation of symbols]

[0048] 1. Rehabilitation strip material production equipment 1a Feed line 10 Rehabilitation strip 10a Synthetic resin raw materials 11 Main belt section 12 Reinforcement ridge 13 Female mating part 14 Male mating part 18 The belt portion on the winding machine side from the cutter 18e End part 19 Winding roll 20 Extrusion molding section 21 Cooling water tank 22 Pick-up machine 23 Cutting machine 23c cutter 28 Drums 28a drum body 28f flange 29 Winder 30 Retention mechanism 31 clamping roller 32 clamping roller 33 Roller body 34 Soft coating material 35 Guide roller 39 frames 40 Advancement / retraction mechanism 41 Air Cylinder 50 Rotational braking mechanism 51 Powder Brake

Claims

1. A rehabilitating strip-shaped member production device that produces a long strip-shaped member made of synthetic resin to be used as a spiral rehabilitating pipe, comprising: an extrusion molding section that extrudes the belt-shaped member; a winding machine for winding up the belt-shaped member; a cutter that cuts the belt-shaped member on a feed line from the extrusion molding unit to the winding machine; a holding mechanism disposed between the cutter and the winder for holding a strip portion of the strip-shaped material on a side of the winder from the cutter; A rehabilitating strip-shaped member production apparatus comprising:

2. 2. The apparatus for producing a strip-shaped member for rehabilitating according to claim 1, wherein the holding mechanism includes a pair of clamping rollers for clamping the strip portion from both sides in a direction perpendicular to the extension direction and width direction of the feed line.

3. 3. The apparatus for producing a strip-shaped member for rehabilitation according to claim 2, wherein the holding mechanism includes an advancing and retreating mechanism for moving the pair of pinching rollers toward and away from each other and applying a pinching force to the pinching rollers when they approach each other.

4. 4. The apparatus for producing a strip-shaped member for rehabilitation according to claim 3, wherein the advancing and retreating mechanism includes a fluid pressure cylinder operated by a compressible working fluid.

5. 5. The apparatus for producing a strip-shaped member for rehabilitating according to claim 2, wherein at least one of the pinching rollers is provided with a rotation braking mechanism for applying a braking force to suppress rotation of the pinching roller.

6. When the operation of the winding machine is stopped, a braking force is applied by the rotation braking mechanism, 6. The apparatus for producing a strip-shaped member for rehabilitation according to claim 5, wherein the braking force exerted by the rotation braking mechanism is released or weakened when the winding machine is in operation compared to when the operation is stopped.

7. 7. The apparatus for producing a strip-shaped member for rehabilitating according to claim 6, wherein the rotational braking mechanism includes a powder brake.

8. 3. The apparatus for producing a belt-shaped member for rehabilitation according to claim 2, wherein the outer circumferential surfaces of the pinching rollers are provided with a soft covering material.

9. A method for producing a long strip-shaped member for rehabilitation, which is made of a synthetic resin and serves as a spiral rehabilitating pipe, comprising the steps of: extruding the belt-shaped member by an extrusion molding unit; A step of winding up the formed belt-shaped member by a winding machine; a step of holding a strip portion of the strip-shaped material from the cutter to the winder by a holding mechanism disposed between the cutter and the winder on a feed line from the extrusion molding section to the winder; cutting the belt-shaped member with a cutting machine; A method for producing a belt-shaped member for rehabilitation, comprising:

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