JP6768403B2 - Fitting unit and pipe making machine equipped with the mating unit - Google Patents

Description

The present invention has a vehicle body capable of traveling in the direction of the pipe axis inside the pipe, and a shaft that protrudes in front of the vehicle body and is rotatably provided on the vehicle body, and is supplied from at least the front of the vehicle body. A fitting unit provided in a pipe making machine for forming a pipe body from a long pipe body constituent member spirally wound around the inner surface of the pipe pipe, and a pipe making provided with the fitting unit. Regarding the machine.

In Patent Document 1, a pipe body component composed of a strip which is an example of a strip-shaped member and a joiner which is an example of a fitting member is sent from a manhole to an aged pipe, and the strip is sent to the inner surface of the pipe. While winding in a spiral shape, adjacent strips are connected via a joiner to form a continuous tube body, and a filler is filled between the tube body and the tube tube to integrate with the tube tube. A rehabilitation method for forming a composite pipe is disclosed.

As the pipe making machine 100 used in such a rehabilitation method, as shown in FIGS. 7 and 8, the vehicle body 20 capable of traveling in the direction of the pipe axis inside the substantially circular pipe shaft P, and the vehicle body 20 There is a shaft 24 provided so as to project along the traveling direction of the vehicle body 20 and a fitting unit 90 that can rotate around the shaft 24 in the circumferential direction. A swivel unit 22 composed of a drive unit 21, a transmission gear, or the like is arranged on the vehicle body 20, and a shaft 24 pivotally supported by bearings 24a and 24b is swiveled based on the power of the drive unit 21.

The pipe making machine 100 rotates the fitting unit 90 around the shaft 24 as it advances in the pipe axis direction, and causes the joiner 2 by a pair of pressing rollers 91 and 92 provided at both ends of the fitting unit 90. Pressing with a predetermined pressure, the joiner 2 is fitted to adjacent strips 1 spirally wound around the inner surface of the pipe shaft P at a predetermined interval to form a pipe body 3.

As shown in FIGS. 9 and 10, the fitting unit 90 is provided with a cylinder unit 96 including a rod 95 connected to a piston 94 that slides in the cylinder 93. The fitting unit 90 has a variable distance between the pair of pressing rollers 91 and 92 by moving the rod 95 forward and backward from the cylinder 93 by compressed air supplied from a supply unit (not shown).

As shown in FIG. 9, assuming that the shortest distance between the pair of pressing rollers 91 and 92 when the rod 95 is most retracted by the cylinder 93 is M, as shown in FIG. 10, the rod 95 is the most from the cylinder 93. When advanced, the distance between the pair of pressing rollers 91 and 92 is the longest distance T (= M + S), which is the shortest distance M plus the stroke amount S (= sa + sb) of the rod 95.

Japanese Unexamined Patent Publication No. 2013-136185

By the way, in order to fit the joiner 2 to the strip 1, the fitting unit 90 needs that the pressing rollers 91 and 92 press the joiner 2 toward the strip 1 with a predetermined pressure.

Therefore, the longest distance T of the pair of pressing rollers 91 and 92 needs to be longer than the width which is the longest distance between the opposing surfaces of the pipe P. When the longest distance T is shorter than the width of the pipe P, the pair of pressing rollers 91, 92 causes the longest distance between the opposing surfaces of the pipe P to be longer than the longest distance T. This is because the joiner 2 cannot be pressed and the joiner 2 and the strip 1 cannot be fitted. In order for the pipe making machine 100 to be arranged in the pipe P, the shortest distance M needs to be shorter than the height which is the shortest distance between the facing surfaces of the pipe P.

That is, the tube P is within the range of the locus through which the pair of pressing rollers 91 and 92 pass when the longest distance is T and the locus through which the pair of pressing rollers 91 and 92 pass when the shortest distance is M. There must be an inner surface. However, strictly speaking, it is necessary to consider the existence of strip 1 and joiner 2.

The fitting unit 90 of the conventional pipe making machine 100 can be used for a circular pipe having a relatively small difference between the longest distance and the shortest distance between the facing surfaces. In some cases, it cannot be used for non-circular tubes, for example, rectangular or horseshoe-shaped tubes, in which the difference between the distance and the shortest distance is relatively large.

The present invention has been made in view of the above-mentioned problems, and is a fitting unit that can be used for a pipe having a shape that cannot be handled by a conventional fitting unit, and a pipe making equipped with the fitting unit. The purpose is to provide an opportunity.

The characteristic configuration of the fitting unit according to the present invention for achieving the above object is a vehicle body capable of traveling inside the cylinder in the direction of the pipe axis, and the vehicle body protruding forward and rotating in the vehicle body. A pipe making machine having a shaft provided in the cylinder, which is supplied from at least the front of the vehicle body and is spirally wound around the inner surface of the pipe cylinder to form a pipe body. A pair of cylinder units are provided in the cylinder unit, and the cylinder unit includes a double-acting cylinder, a piston that slides in the cylinder, and is connected to the piston and can move forward and backward from the cylinder. The rod is provided with a pressing roller at the tip of the rod, which presses the cylinder constituent member toward the inner surface of the pipe cylinder and fits the adjacent pipe body constituent members together. Further, the cylinder unit is provided with a support portion for supporting the cylinder unit so that the advancing / retreating directions of the rods are on the same line and in opposite directions in the front view of the vehicle body.

According to the above configuration, the stroke length of the rod provided in each of the two cylinder units having opposite advancing / retreating directions can be used. Therefore, if the cylinder unit has the same configuration as the conventional one, the stroke length is doubled. Can be obtained. Since the range between the locus of the pair of pressing rollers when the distance between the rollers is the longest and the locus of the pair of pressing rollers when the distance between the rollers is the shortest is wider than before, it is conventional. It has become possible to use it for pipes with shapes that the fitting unit could not handle.

In the present invention, each of the cylinders is composed of an air cylinder or a hydraulic cylinder operated by compressed air or pressure oil supplied from the supply unit, and at least the advancing sides of the rods of the cylinders are communicated with each other. It is preferable to have it.

If the pressure of the pair of pressing rollers pressing the tubular body constituent members is uneven, the tubular body may not be formed properly. However, since the rods of the cylinders are connected to each other on the advancing side as described above, the pressing roller provided on the cylinder first comes into contact with the tubular body constituent member, and the rod provided on the cylinder is more than that. Even when the cylinder does not advance, the other cylinder can advance the rod provided in the cylinder until the pressing roller provided in the cylinder abuts on the tubular body constituent member. Finally, the pair of pressing rollers can press the tube constituent members toward the inner surface side of the tube with the same pressure. As a result, the tube body is properly formed.

In the present invention, an advance side supply path branched and connected to the advance side of the rod of each cylinder, a retirement side supply path branched and connected to the retirement side of the rod of each cylinder, and the advance side supply path. Alternatively, it is preferable that one of the retreat side supply paths and a connection unit for connecting the supply unit are provided.

While using one supply unit, the rod advance / retreat of each cylinder unit can be operated at the same time. Since each rod is operated to advance and retreat with compressed air or pressure oil of the same pressure, the pair of pressing rollers can press the pipe body constituent members toward the inner surface side of the pipe with the same pressure.

In the present invention, it is preferable that the support portion is configured so that the position of supporting each cylinder unit can be changed along the advancing / retreating direction of the rod.

Since the conventional fitting unit is provided with a pair of pressing rollers at both ends of the cylinder unit, the longest distance and the shortest distance between the pair of pressing rollers are defined only by the stroke length of the rod.

On the other hand, in the fitting unit according to the present invention, the position where the support portion supports each cylinder can be changed along the advancing / retreating direction of the rod, so that the supporting position of the cylinder is shifted to the advancing side of the rod. Therefore, the longest distance between the pair of pressing rollers can be extended by that amount, and the shortest distance between the pair of pressing rollers can be shortened by that amount by shifting the support position of the cylinder to the retracted side of the rod. It was. As a result, it has become possible to widen the range between the locus through which the pair of pressing rollers pass at the longest distance and the locus through which the pair of pressing rollers pass at the shortest distance.

In the present invention, it is preferable that the support portion supports each of the cylinder units at a position shifted back and forth along the axial center of the shaft.

Since the tubular member is spirally wound around the inner surface of the tube, each time it goes around the inner surface of the tube, it moves back and forth in the axial direction of the tube by at least the width of the tubular component. .. That is, the fitting portions of the adjacent pipe body constituent members are displaced back and forth. At this time, the parts facing each other are moved back and forth by half a turn.

Therefore, in order for the pair of pressing rollers to appropriately press the tubular body constituent members spirally wound around the inner surface of the pipe shaft, the pair of pressing rollers are used in the fitting portion of the tubular body constituent members. It is necessary to be supported at a position shifted back and forth along the axis of the shaft according to the front-back shift. With the above configuration, each pressing roller provided at the tip of each rod is, as a result, supported at a position shifted back and forth along the axis of the shaft.

In the present invention, the cylinder unit is provided with a fixed case and a moving case, each of which has a bottomed tubular shape and is configured telescopically. The cylinder is fixed to the inner surface of the fixed case, and the cylinder unit is fixed to the inner surface of the moving case. The tip end side of the rod is fixed, and the moving case is arranged so that the gap between the outer surface of the cylinder and the inner surface of the fixed case can be moved as the rod moves forward and backward, and the moving case is attached to the fixed case. It is preferable that a guide roller sliding on the outer surface is provided and the fixed case is supported by the support portion.

Since the cylinder and rod are arranged inside the fixed case and the moving case, there is less risk of damage as compared with the case where the cylinder or rod is arranged in the support portion while being exposed. Further, since there is little possibility that foreign matter adheres to the rod, there is little possibility that the packing between the rod and the cylinder is damaged or that foreign matter is drawn into the cylinder as the rod moves forward and backward.

In order to achieve the above object, the characteristic configuration of the pipe making machine according to the present invention is a vehicle body capable of traveling inside the pipe in the direction of the pipe axis, and the vehicle body protruding in front of the vehicle body and rotating. A pipe making machine having a shaft provided in the above, which is supplied from at least the front of the vehicle body and forms a pipe body from a long pipe body constituent member spirally wound around the inner surface of the pipe. The point is that a fitting unit having any one of the above-mentioned characteristic configurations is provided.

It has become possible to use it for pipes with shapes that cannot be handled by conventional pipe making machines.

It is the schematic of the pipe making machine which concerns on this invention. It is a front view of the pipe making machine which concerns on this invention. It is a top view of the pipe making machine which concerns on this invention. It is explanatory drawing of the fitting unit which concerns on this invention. It is explanatory drawing of the fitting unit which concerns on this invention. It is an air circuit diagram between the fitting unit and the supply unit which concerns on this invention. It is a top view of the conventional pipe making machine. It is a front view of the conventional pipe making machine. It is explanatory drawing of the conventional mating unit. It is explanatory drawing of the conventional mating unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same parts or corresponding parts are designated by the same reference numerals.

As shown in FIG. 1, the pipe making machine 10 according to the present invention is arranged in a pipe helix P having a rectangular cross section, is sent from the ground through a manhole (not shown), and is an inner surface of the pipe helix P. It is used to form a tubular body 3 from a strip 1 which is an example of a long strip-shaped member spirally wound around the pipe, and a joiner 2 which is an example of a long fitting member.

The strip 1 and the joiner 2 before use are stored in a state of being wound in a circular shape on the ground around the manhole, and are pulled out by a worker at the time of use and spirally wound around the inner surface of the pipe P. Be done. In the present embodiment, the strip 1 and the joiner 2 are supplied from the front in the traveling direction of the pipe making machine 10.

The strip 1 and the joiner 2 are made of a material having sufficient strength to cope with various changes in the environment, for example, a synthetic resin such as hard vinyl chloride. The strip 1 and the joiner 2 are formed with a fitting groove over the entire length of one and a groove to be fitted with the fitting groove over the entire length of the other.

As shown in FIG. 2, spacers 4 are arranged at the four corners of the tube P, and the strip 1 is wound along the inner surface of the tube P and the surface of the spacer 4. By the pipe making machine 10, adjacent strips 1 are connected via a joiner 2, and after the pipe body 3 is formed on the inner surface of the pipe pipe P, the space on the back surface of the spacer 4 is filled with a filler, and the pipe body is filled. In No. 3, a composite tube integrated with the tube P is formed.

As shown in FIGS. 1 to 3, the pipe making machine 10 includes a vehicle body 20, a drive unit 21, a swivel unit 22, a fitting unit 23, and a supply unit 70 (which can travel inside the pipe P in the pipe axis direction). (See FIG. 6) and the like.

The vehicle body 20 is provided with wheels at four corners of a stainless steel frame body, for example, and is configured to be movable along the pipe axis of the pipe P.

The drive unit 21 is composed of, for example, a motor, and is arranged on the frame body of the vehicle body 20. The supply unit 70 is composed of, for example, a known air compressor, operates using the drive unit 21 as a power source, and is configured to supply compressed air of a predetermined pressure to the cylinder units 30 and 40, which will be described later.

The swivel unit 22 is composed of a transmission gear mechanism or the like, is arranged on the frame body of the vehicle body 20, and swivels the shaft 24 pivotally supported by the bearings 24a and 24b based on the power of the drive unit 21.

The tip of the shaft 24 extends forward from the vehicle body 20 in the traveling direction, and the fitting unit 23 is provided at the tip of the shaft 24 via a support portion 25. Therefore, as the shaft 24 rotates based on the power of the drive unit 21, the fitting unit 23 is rotated around the axis of the shaft 24.

A pair of cylinder units 30 and 40 and a pressing roller 50 that presses the joiner 2 toward the inner surface of the pipe P while rotating along the joiner 2 and connects the adjacent strips 1 to the fitting unit 23. 60 and are provided.

Since the cylinder unit 30, the cylinder unit 40, and the pressing roller 50 and the pressing roller 60 have the same configuration, the cylinder unit 30 and the pressing roller 50 will be described when it is not necessary to distinguish them in the following description. The description of the unit 40 and the pressing roller 60 will be omitted.

As shown in FIGS. 4 and 5, the cylinder unit 30 includes an air cylinder operated by the pressure of compressed air supplied from the supply unit 70, a fixed case 34 and a moving case 35 for accommodating the air cylinder. It is configured with.

The air cylinder includes a double-acting cylinder 31, a piston 32 that slides in the cylinder 31, and a rod 33 that is connected to the piston 32 and can move forward and backward from the cylinder 31.

The fixed case 34 and the moving case 35 each have a bottomed tubular shape and are telescopically configured, and are each made of stainless steel or the like.

The bottom portion of the cylinder 31 is fixed to the bottom side inner surface of the fixed case 34. The tip end side of the rod 33 is fixed to the bottom side inner surface of the moving case 35.

The moving case 35 provides a gap between the outer surface of the side portion of the cylinder 31 and the inner surface of the side portion of the fixed case 34.
It is arranged so as to be movable as the rod 33 moves forward and backward. The fixed case 34 is provided with a plurality of guide rollers 36 that slide on the outer surface of the side portion of the moving case 35, so that the moving case 35 can smoothly move forward and backward from the fixed case 34.

The fixed case 34 is provided with a contact portion 37 for contacting the outer surface of the side portion of the fixed case 44 provided in the cylinder unit 40 and maintaining a distance between the two.

A roller support portion 51 for supporting the pressing roller 50 is provided on the bottom outer surface of the moving case 35.

The roller support portion 51 includes a swing mechanism 52 capable of swinging the rotation axis C1 of the pressing roller 50 around the swing axis C2 intersecting the rotation axis C1 and a rotation axis C1 of the pressing roller 50. A rotation mechanism 53 that can rotate around a rotation axis C3 that is orthogonal to the rotation axis C1 is provided.

The swing mechanism 52 allows the pressing roller 50 to swing around the swing axis C2 that intersects the rotation axis C1. Therefore, the pressing roller 50 can appropriately press the joiner 2 even if the pipe making machine 10 travels slightly deviated from the pipe axis.

In order to enable smooth fitting of the strip 1 and the joiner 2 by the fitting unit 23, the pressing roller 50 is determined from the traveling direction of the vehicle body 20 and the rotation direction of the fitting unit 23 around the shaft 24. It needs to roll smoothly in the direction in which it is derived. The pressing roller 50 can be appropriately tilted forward or backward by rotating the rotation axis C1 of the pressing roller 50 around the rotation axis C3 orthogonal to the rotation axis C1 by the rotation mechanism 53. As a result, the rolling direction of the pressing roller 50 can be adjusted in the direction derived from the traveling direction of the vehicle body 20 and the rotating direction of the fitting unit 23 around the shaft 24.

As shown in FIGS. 3 to 5, the support portion 25 faces the front wall portion 25a and the rear wall portion 25b facing each other at a predetermined distance, and faces the front wall portion 25a and the rear wall portion 25b at a predetermined distance. It is provided with a continuous upper wall portion 25c and a lower wall portion 25d.

The front wall portion 25a is configured to be detachably attached to and from the flanges of the upper wall portion 25c and the lower wall portion 25d by bolts 25e.

The space partitioned by the front wall portion 25a and the rear wall portion 25b and the upper wall portion 25c and the lower wall portion 25d serves as a support space for the fixed case 34 of the cylinder unit 30 and the fixed case 44 of the cylinder unit 40.

The support portion 25 positions the cylinder units 30 and 40 so that the advancing / retreating directions of the rods 33 and 43 are on the same line and in opposite directions in the front view of the vehicle body 20 and are displaced back and forth along the axis of the shaft 24. Support.

Since the cylinder units 30 and 40 are supported by the support portion 25 so as to be displaced back and forth along the axial center of the shaft 24, the pressing rollers 50 and 60 are spirally wound around the inner surface of the pipe P. It is arranged forward in the traveling direction by a distance corresponding to half a turn of the strip 1.

The cylinder 31 is provided with a ventilation plug 71a on the advancing side of the piston 32 and a ventilation plug 72a on the retreating side. The ventilation plugs 71a and 72a penetrate the fixed case 34 and are connected to the ventilation hoses 73a and 74a outside the fixed case 34, respectively.

The cylinder 41 is provided with a ventilation plug 71b on the advancing side of the piston 42 and a ventilation plug 72b on the retreating side. The ventilation plugs 71b and 72b penetrate the fixed case 44 and are connected to the ventilation hoses 73b and 74b outside the fixed case 44, respectively.

The ventilation plugs 71a and 71b are placed on the outer surface of the fixed case 34 so as to cover the ventilation plugs 71a and 71b in a plane when the fixed case 34 is moved along the advancing and retreating directions of the rod 33. The protective portions 38a and 38b are provided to prevent the rod from coming into contact with the rod.

Similarly, on the outer surface of the fixed case 44, when the fixed case 44 is moved along the advancing / retreating direction of the rod 43 at a position that covers the ventilation plugs 72a and 72b in a plane, the ventilation plugs 72a and 72b are attached to the rear wall portion. Protective units 48a and 48b are provided to prevent contact with 25b.

As shown in FIG. 6, the ventilation hoses 73a and 73b constitute an advance side supply path 73 branched and connected to the advance side of the cylinders 31 and 41.

The ventilation hoses 74a and 74b form a retirement side supply path 74 branched and connected to the retirement side of the cylinders 31 and 41.

A connection unit 75 is provided between the supply unit 70 and the advance side supply path 73 and the retirement side supply path 74.

The connection unit 75 is composed of, for example, a known four-way solenoid valve, and connects either one of the advance side supply path 73 or the retreat side supply path 74 to the supply unit 70 according to the operation of the worker, and the other. It is configured so that air can be exhausted from.

When the advance side supply path 73 and the supply unit 70 are connected by the connection unit 75, compressed air is supplied to the advance side of the cylinders 31 and 41, and the rods 33 and 43 move as the pistons 32 and 42 move. Advances. At this time, the air on the retirement side of the cylinders 31 and 41 is pushed out from the ventilation plugs 72a and 72b by the movement of the pistons 32 and 42, and is discharged through the retirement side supply path 74.

When the retreat side supply path 74 and the supply unit 70 are connected by the connection unit 75, compressed air is supplied to the retreat side of the cylinders 31 and 41, and the rods 33 and 43 move as the pistons 32 and 42 move. Retires. At this time, the air on the advance side of the cylinders 31 and 41 is pushed out from the ventilation plugs 71a and 71b by the movement of the pistons 32 and 42, and is discharged through the advance side supply path 73.

In any case, one supply unit 70 can be used to simultaneously control the advance and retreat of the rods 33 and 43 of the cylinder units 30 and 40. At that time, the rods 33 and 43 are operated to advance and retreat with the same pressure. Therefore, the pair of pressing rollers 50 and 60 can press the joiner 2 toward the inner surface side of the pipe P with the same pressure.

The fitting unit 23 is configured as described above, and when the rod 33 is retracted most to the cylinder 31, the pressing roller 50 comes closest to the axial center of the shaft 24. Similarly, when the rod 43 is retracted closest to the cylinder 41, the pressing roller 60 comes closest to the axial center of the shaft 24. At this time, the distance M between the pressing rollers 50 and 60 is the shortest (see FIG. 4).

On the contrary, when the rod 33 is most advanced from the cylinder 31, the pressing roller 50 is farthest from the axis of the shaft 24. Similarly, when the rod 43 is most advanced from the cylinder 41, the pressing roller 60 is farthest from the axial center of the shaft 24. At this time, the distance L between the pressing rollers 50 and 60 is the longest (see FIG. 5).

At this time, the longest distance L is M + 2S obtained by adding the stroke amount S of the rod 33 and the stroke amount S of the rod 43 to the shortest distance M, and the conventional pipe making machine 100 has the longest distance T between the pair of pressing rollers 91 and 92. It is longer than (= M + S) by the stroke amount S. By that amount, it has become possible to handle a pipe tube P having a shape that cannot be handled by the conventional pipe making machine 100.

In the above-described embodiment, the support portion 25 fixedly describes the positions for supporting the fixed case 34 and the fixed case 44.

However, by loosening the bolts 25e that attach the front wall portion 25a to the upper wall portion 25c and the lower wall portion 25d, a margin is created between the front wall portion 25a and the rear wall portion 25b that face each other at a predetermined distance, so that the front wall portion 25a is fixed. The case 34 and the fixed case 44 can be moved along the advancing / retreating directions of the rod 33 and the rod 43.

By tightening the bolts 25e that attach the front wall portion 25a to the upper wall portion 25c and the lower wall portion 25d, the fixed case 34 and the fixed case 44 are sandwiched between the front wall portion 25a and the rear wall portion 25b facing each other at a predetermined distance. , The positions of the fixed case 34 and the fixed case 44 are fixed.

Therefore, when the rod 33 is retracted most to the cylinder 31 and the moving case 35 is retracted most to the fixed case 34, the pressing roller 50 comes closest to the axial center of the shaft 24. Similarly, when the rod 43 is retracted most to the cylinder 41 and the moving case 45 is retracted most to the fixed case 44, the pressing roller 60 comes closest to the axial center of the shaft 24. At this time, the distance M between the pressing rollers 50 and 60 is the shortest.

On the contrary, when the rod 33 is most advanced from the cylinder 31 and the moving case 35 is most advanced from the fixed case 34, the pressing roller 50 is farthest from the axis of the shaft 24. Similarly, when the rod 43 is most advanced from the cylinder 41 and the moving case 45 is most advanced from the fixed case 44, the pressing roller 60 is farthest from the axis of the shaft 24. At this time, the distance L between the pressing rollers 50 and 60 is the longest.

Since it is configured in this way, not only the longest distance L between the pair of pressing rollers 50 and 60 is longer by the stroke amount S than the conventional pipe making machine 100, but also the stroke amount S or more. The longest distance L can be lengthened, and the shortest distance M can also be shortened.

In the above-described embodiment, the case where the cylinder units 30 and 40 are configured to be composed of air cylinders and the supply unit 70 is configured to supply compressed air has been described, but the cylinder units 30 and 40 are composed of hydraulic cylinders. , The supply unit 70 may be configured to supply compressed oil. Along with this, other configurations such as the advance side supply path 73, the retreat side supply path 74, and the connection unit 75 are also adopted to correspond to the pressure oil.

In the above-described embodiment, the strip 1 and the joiner 2 are supplied from the front in the traveling direction of the vehicle body 20, but only the strip 1 is supplied from the front in the traveling direction of the vehicle body 20, and the joiner 2 is supplied from the traveling direction of the vehicle body 20. It may be configured to be supplied from the rear. In this case, the joiner 2 passes through the inside of the shaft 24 and is supplied from the rear of the fitting unit 23 to the inner surface of the pipe P.

In the above-described embodiment, the case where the tubular body constituent member is composed of the strip 1 and the joiner 2 has been described, but the tubular body constituent member may be composed of only the strip 1. In this case, one end edge of the strip 1 is provided with a fitting groove, and the other end edge is provided with a fitting groove for fitting with the fitting groove.

In the above-described embodiment, the case where the pipe tube P produced by the tube making machine 10 is rectangular has been described as an example, but the tube tube P is not limited to a rectangular shape and may be non-circular, for example, a horseshoe shape. .. It may also be circular.

The above-described embodiments are all examples of the present invention, and the description does not limit the present invention, and the specific configuration of each part can be appropriately modified and designed within the range in which the effects of the present invention are exhibited. is there.

1: Strip (belt-shaped member)
2: Joiner (fitting member)
3: Tube body 10: Pipe making machine 20: Body 23: Fitting unit 24: Shaft 25: Support part 30: Cylinder unit 31: Cylinder 32: Piston 33: Rod 34: Fixed case 35: Moving case 36: Guide roller 40 : Cylinder unit 41: Cylinder 42: Piston 43: Rod 44: Fixed case 45: Moving case 50: Pressing roller 60: Pressing roller 70: Supply unit 73: Advance side supply path 74: Retirement side supply path 75: Connection unit

Claims (6)

It has a vehicle body capable of traveling in the direction of the pipe axis inside the pipe, and a shaft that protrudes forward of the vehicle body and is rotatably provided on the vehicle body, and is supplied from at least the front of the vehicle body. It is a fitting unit provided in a pipe making machine that forms a pipe body from a long pipe body component spirally wound around the inner surface of the pipe.
Equipped with a pair of cylinder units
The cylinder unit is provided with a double-acting cylinder, a piston that slides in the cylinder, and a rod that is connected to the piston and can move forward and backward from the cylinder.
The tip of the rod is provided with a pressing roller that presses the pipe body constituent member toward the inner surface of the pipe rod and fits the adjacent pipe body constituent members together.
Further, the respective cylinder units, as advancing and retracting direction of the rod is collinear and opposite in the front view of the vehicle body, a support portion for supporting the shaft includes et al is,
The support portion is a fitting unit that supports each cylinder unit at a position shifted back and forth along the axis of the shaft . According to claim 1, each cylinder is composed of an air cylinder or a hydraulic cylinder operated by compressed air or pressure oil supplied from a supply unit, and at least the advancing sides of the rods of the cylinders are communicated with each other. The mating unit described. An advance side supply path branched and connected to the advance side of the rod of each cylinder,
A retirement side supply path branched and connected to the retirement side of the rod of each cylinder,
The fitting unit according to claim 2, further comprising either one of the advance side supply path or the retreat side supply path, and a connection unit for connecting the supply unit. The fitting unit according to any one of claims 1 to 3, wherein the support portion is configured so that the position of supporting each cylinder unit can be changed along the advancing / retreating direction of the rod. The cylinder unit is provided with a fixed case and a moving case, each of which has a bottomed cylinder shape and is telescopically configured.
The cylinder is fixed to the inner surface of the fixed case,
The tip end side of the rod is fixed to the inner surface of the moving case,
The moving case is arranged so that the gap between the outer surface of the cylinder and the inner surface of the fixed case can be moved as the rod advances and retreats.
The fixed case is provided with a guide roller that slides on the outer surface of the moving case.
The fitting unit according to any one of claims 1 to 4 , wherein the fixed case is supported by the support portion. It has a vehicle body capable of traveling in the direction of the pipe axis inside the pipe, and a shaft that protrudes forward of the vehicle body and is rotatably provided on the vehicle body, and is supplied from at least the front of the vehicle body. It is a pipe making machine that forms a pipe body from a long pipe body component spirally wound around the inner surface of the pipe.
A pipe making machine provided with the fitting unit according to any one of claims 1 to 5 .

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