JP2021102309A - Pipe making machine - Google Patents

Abstract

To provide a pipe making machine capable of easily adjusting the position of a fitting roller.SOLUTION: A pipe making machine comprises: a main body part 11 capable of travelling inside a pipe ditch 1; a shaft 16 which is extended forward in an advancing direction of the pipe making machine 10 in the main body part 11, and is rotatable; a fitting arm 20 rotatably supported by the shaft 16 integrally with the shaft 16; a fitting roller 24 provided on the fitting arm 20, and pressing a strip 3 wound later toward the strip 3 wound earlier to fit with the strip 3, or pressing a joiner 4 arranged so as to straddle both of the strips 3 toward the strip 3 to fit the strip 3 and the joiner 4 together; and a position adjustment mechanism 30 capable of adjusting a position of the fitting roller 24 with respect to the fitting arm 20 back and forth along the advancing direction of the pipe making machine 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe making machine for forming a rehabilitated pipe by connecting strips spirally wound at a predetermined pitch to a wall surface of a pipe directly or indirectly via a joiner.

Patent Document 1 discloses a pipe making machine 100 that forms a tubular body 200 by spirally winding a strip 1 and a joiner 2 on an inner surface (ceiling, side wall, floor) of an existing pipe P on a vehicle body 60. Each configuration and each reference numeral in the description of the background technique are those in Patent Document 1.

The strip 1 and the joiner 2 are made of a synthetic resin such as hard vinyl chloride.

The pipe making machine 100 includes a fitting unit 30 and a feed unit 40, and the strips 1 are spirally wound around the inner surface of the existing pipe P at a predetermined pitch, and the strips 1 are indirectly connected to each other by a joiner 2. Therefore, specifically, the fitting portions 2c provided on both sides along the longitudinal direction of the joiner 2 are press-fitted into the fitting portions 1c provided on both sides along the longitudinal direction of the strip 1. The tubular body 200 is formed by connecting the strip 1 and the joiner 2.

The pipe making machine 100 is provided with wheels 65 at four corners of the vehicle body 60, and can travel in the pipe axis direction of the existing pipe P by rotating the wheels 65 by the power of the drive source 64.

By the way, in order for the fitting portion 1c of the strip 1 and the fitting portion 2c of the joiner 2 to be properly fitted, the rollers 31a and 31b of the fitting unit 30 are appropriate so that the entire joiner 2 is directed toward the strip 1. It is necessary to press the roller 31a and 31b, and it is optimal that the central portion of the rollers 31a and 31b in the width direction is located at the center of the joiner 2 to be pressed in the width direction. Conventionally, in order to press the rollers 31a and 31b toward the joiner 2 from an appropriate position, the positions of the rollers 31a and 31b are moved back and forth by moving the pipe making machine 100 itself back and forth along the traveling direction. Was there.

When the cross-sectional shape of the existing pipe P is circular, the distance from the pipe shaft to the wall surface is constant. There was little change in position. However, when the cross-sectional shape of the existing pipe P is not circular, for example, when it is rectangular, the distance from the pipe shaft to the wall surface is different between the surface portion and the corner portion. Since the relative position change before and after the traveling direction of 100 is large, it is necessary to adjust the positions of the rollers 31a and 31b appropriately with high frequency.

Further, when the inner surface of the existing pipe P for forming the tubular body 200 is not smooth, the surface of the strip 1 wound along the inner surface may be uneven. In such a case, since the position where the joiner 2 should be pressed changes, the positions of the rollers 31a and 31b need to be adjusted appropriately each time.

Due to the alignment of the rollers 31a and 31b, it is complicated to move the pipe making machine 100 together. Therefore, there has been a demand for a mechanism capable of easily adjusting the positions of the rollers 31a and 31b so that the rollers 31a and 31b can press the joiner 2 toward the strip 1 from an appropriate position without moving the pipe making machine 100. ..

Japanese Unexamined Patent Publication No. 2013-199097

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a pipe making machine in which the position of a fitting roller can be easily adjusted.

In order to achieve the above object, the characteristic configuration of the pipe making machine according to the present invention is that strips wound spirally on the wall surface of a pipe at a predetermined pitch are directly wound together or indirectly through a joiner. A pipe making machine that forms a rehabilitated pipe by connecting to a main body portion that can travel inside the pipe and extends forward in the main body portion in the traveling direction of the pipe making machine. A shaft configured to be rotatable with the shaft, a fitting arm rotatably supported on the shaft, and a strip provided on the fitting arm and wound up later. Press against the strip wound around the strip to fit it into the strip, or press the joiner arranged so as to straddle the strips against the strip and press the strip and the joiner together. At a point where a fitting roller for fitting the fitting roller and a position adjusting mechanism capable of adjusting the position of the fitting roller with respect to the fitting arm back and forth along the traveling direction of the pipe making machine are provided. is there.

According to the above configuration, the position adjusting mechanism positions the fitting roller with respect to the fitting arm along the traveling direction of the pipe making machine without moving the pipe making machine for the alignment of the fitting roller. It can now be easily adjusted back and forth.

In the present invention, the position adjusting mechanism is configured so that the position can be changed relative to the base portion provided on the fitting arm and the base portion while supporting the fitting roller. It is preferable that the moving portion is provided with a moving portion and a moving mechanism for moving the moving portion with respect to the base portion.

The position adjusting mechanism is easily realized by a configuration in which the base portion provided on the fitting arm and the moving portion supporting the fitting roller are relatively moved by the moving mechanism.

In the present invention, the moving mechanism positions the moving portion with respect to the base portion in the traveling direction of the pipe making machine, at least before and after the traveling direction of the pipe making machine, at least in a spirally wound strip. It is preferable that the structure is movable over the width along the direction.

For alignment of the fitting roller, if the position of the fitting roller with respect to the fitting arm can be moved at least along the width of the spirally wound strip along the traveling direction of the pipe making machine. The position of the fitting roller with respect to the fitting arm can be appropriately adjusted back and forth along the traveling direction of the pipe making machine without moving the pipe making machine.

In the present invention, it is preferable that the moving mechanism is configured so that the position of the moving portion with respect to the base portion can be adjusted steplessly.

According to the above configuration, since the position of the fitting roller with respect to the fitting arm can be adjusted steplessly, the position of the fitting roller with respect to the fitting arm can be finely adjusted, so that the fitting roller can be moved from an appropriate position. For example, the joiner can be pressed against the strip.

In the present invention, the moving mechanism is provided in a guide rail provided on the base portion, a bolt screwed portion provided on the base portion, and a female screw hole formed in the bolt screwed portion. A screwable bolt-shaped member, a guide shoe provided on the moving portion and slidable on the guide rail, and a bolt-shaped member provided on the moving portion and loosely penetrated to screw the bolt-shaped member. It is preferable that the moving portion is provided with a screw-driven driven portion that follows and moves the moving portion.

According to the above configuration, when the bolt-shaped member is screwed with respect to the bolt-screwed portion provided on the base portion, the screwing driven portion follows the bolt-shaped member and thus the moving portion moves to the base portion. Move against. At that time, since the guide shoe moves in a manner of sliding on the guide rail, the moving portion moves with respect to the base portion in a stable manner.

In the present invention, it is preferable that the position adjusting mechanism includes a fixing mechanism for fixing the movement of the moving portion by the moving mechanism.

According to the above configuration, since the relative movement of the moving portion with respect to the base portion can be fixed by the fixing mechanism, it is possible to prevent the fitting roller from unintentionally moving with respect to the fitting arm after adjusting the position.

It is a side view of a pipe making machine. It is explanatory drawing of the position adjustment mechanism. It is explanatory drawing of the main part of the position adjustment mechanism. It is explanatory drawing of the main part of the position adjustment mechanism. It is explanatory drawing of the position adjustment mechanism. It is explanatory drawing of the main part of the position adjustment mechanism. It is a front view of a pipe making machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 7, the pipe making machine 10 according to the present invention forms a rehabilitation pipe 2 on the wall surface of the pipe 1 while traveling inside the pipe 1 having a rectangular cross section. ..

The rehabilitation pipe 2 is continuous by indirectly connecting the strips 3 to the wall surface of the pipe 1 with the strips 3 spirally wound at a predetermined pitch via the joiner 4 by the pipe making machine 10. Is formed in.

The strip 3 and the joiner 4 are strip-shaped members 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.

As shown in FIG. 2, the strip 3 is provided with fitting convex portions 51 on both side edges in the longitudinal direction, and the joiner 4 is fitted on both side edges in the longitudinal direction so as to be fitted to the fitting convex portions 51 of the strip 3. A joint recess 52 is provided.

The strip 3 and the joiner 4 before use are stored in a state of being wound in a circular shape on the ground around a manhole in which the pipe making machine 10 communicates with a pipe 1 forming a rehabilitation pipe 2. At the time of use, it is drawn into the inside of the pipe 1 through the manhole. In the present embodiment, the strip 3 and the joiner 4 are supplied from the front in the traveling direction of the pipe making machine 10.

By fitting the fitting recess 52 of the joiner 4 to the fitting convex portion 51 of the strip 3 by the pipe making machine 10, the strips 3 in which the strip 3 is spirally wound around the wall surface of the pipe 1 are formed. It is indirectly connected by the joiner 4.

In the present embodiment, since the pipe 1 has a rectangular cross-sectional shape, spacers 6 are arranged in advance on the top surface and corners, and the strip 3 is actually wound along the surface of the spacer 6. Can be set up. Then, by injecting a filler into the gap between the wall surface of the pipe 1 provided by the spacer 6 and the rehabilitation pipe 2, the pipe 1 and the rehabilitation pipe 2 are integrated.

As shown in FIG. 1, the pipe making machine 10 is provided with a drive unit 12, a swivel unit 13, and the like in a main body portion 11 capable of traveling inside the pipe channel 1 in the pipe axis direction.

The main body 11 is provided with wheels 14 at four corners, and the wheels 14 enable the vehicle to travel. Further, in the main body 11, auxiliary wheels 15 are extended upward in the present embodiment toward the rehabilitation pipe 2 formed on the wall surface of the pipe 1. The smooth running of the main body 11 is assisted by the training wheels 15 coming into contact with the surface of the rehabilitation pipe 2.

The drive unit 12 includes an air motor driven by the pressure of air supplied from an air compressor installed on the ground via a tube, a transmission mechanism for shifting the output of the air motor, and the like.

The swivel unit 13 is provided with a shaft 16 extending forward in the traveling direction of the pipe making machine 10 in the main body 11. The shaft 16 is configured to be rotatable by the power output from the air motor of the drive unit 12.

On the shaft 16, in order from the front in the traveling direction of the pipe making machine 10, a feed arm 18 having a feed unit 17, a fitting arm 20 having a fitting unit 19, and an auxiliary fitting arm 22 having an auxiliary fitting unit 21 are provided. It is prepared in this order.

The feed arm 18 forms a constant angle with respect to the fitting arm 20 in front of the shaft 16 in the rotation direction when the pipe making machine 10 is viewed from the front in the traveling direction, and the feed arm 18 is arranged on the feed arm 18. The strip 3 supplied by the unit 17 from the front in the traveling direction of the pipe making machine 10 is pulled in by a pair of feed rollers 23, and the wall surface of the pipe 1 in front of the path of the fitting roller 24 included in the fitting unit 19 described later. It is provided on the shaft 16 so that it can be sent out along the shaft 16.

The pair of feed rollers 23 are driven by the pressure of air supplied from an air compressor (not shown) via a tube. The angle is appropriately adjusted according to the shape of the pipe 1 and the rigidity of the strip 3. Further, "along the wall surface of the pipe 1" means to follow the surface of the spacer 6 when the spacer 6 is provided in the pipe 1.

The feeding angle of the strip 3 by the feed unit 17 is such that the strip 3 has a predetermined pitch in consideration of the traveling speed of the pipe making machine 10, and specifically, the fitting convex portion 51 of the adjacent strips 3 and the joiner 4 are fitted. It is set so as to be spirally wound along the wall surface of the pipe 1 at a distance so that the joint recess 52 and the joint recess 52 can be appropriately fitted.

The fitting arm 20 and the auxiliary fitting arm 22 form an angle of 180 degrees when the pipe making machine 10 is viewed from the front in the traveling direction, and the fitting unit 19 arranged on the fitting arm 20 is auxiliary fitting. The auxiliary fitting unit 21 arranged on the joint arm 22 is located in front of the auxiliary fitting unit 21 in the traveling direction by a distance corresponding to half a winding of the strip 3 spirally wound around the wall surface of the pipe 1. It is provided on the shaft 16.

The fitting roller 24 included in the fitting unit 19 presses the joiners 4 arranged so as to straddle the adjacent strips 3, and the fitting recesses 52 of the joiners 4 are pressed by the fitting protrusions of the adjacent strips 3. It is fitted to 51 (see FIG. 2).

The fitting of the strip 3 and the joiner 4 is mainly performed by the fitting roller 24 arranged on the front side in the traveling direction.

The auxiliary fitting roller 25 included in the auxiliary fitting unit 21 supports the reaction force at the time of the fitting by the fitting roller 24, and also fits the fitting convex portion 51 and the fitting that the fitting roller 24 fails to fit. The recess 52 is fitted.

The fitting arm 20 and the auxiliary fitting arm 22 each have a built-in double-acting air cylinder mechanism. The fitting arm 20 and the auxiliary fitting arm 22 are configured to be individually expandable and contractible by the pressure of air supplied from an air compressor (not shown) to each air cylinder mechanism via a tube. When the fitting convex portion 51 and the fitting concave portion 52 are fitted, the fitting roller 24 and the auxiliary fitting roller 25 are connected to the conduit 1 due to the extension of the fitting arm 20 and the auxiliary fitting arm 22 by the air cylinder mechanism. It is urged toward the wall surface of.

The shaft 16 is configured to turn counterclockwise when viewed from the front in the traveling direction of the pipe making machine 10. Therefore, the feed unit 17, the fitting unit 19, and the auxiliary fitting unit 21 turn counterclockwise when viewed from the front in the traveling direction of the pipe making machine 10.

By turning the shaft 16 while running the pipe making machine 10 along the pipe axis direction of the pipe 1, the feed unit 17, the fitting unit 19, and the auxiliary fitting unit 21 spiral inside the pipe 1. Proceed to.

In order for the fitting protrusion 51 of the strip 3 and the fitting recess 52 of the joiner 4 to be properly fitted, the fitting roller 24 needs to press the joiner 4 toward the strip 3 from an appropriate position. is there.

Therefore, the fitting unit 19 of the pipe making machine 10 is provided with a position adjusting mechanism 30 capable of adjusting the position of the fitting roller 24 with respect to the fitting arm 20.

The position adjusting mechanism 30 is a mechanism for adjusting the position of the fitting roller 24 on the fitting arm 20 back and forth along the traveling direction of the pipe making machine 10.

As shown in FIGS. 2 to 6, the position adjusting mechanism 30 includes a base portion 31, a moving portion 32, a moving mechanism 33, and a fixing mechanism 34. These members are formed by appropriately processing a metal such as stainless steel.

The base portion 31 is a plate-shaped member provided at the tip of the fitting arm 20.

The moving portion 32 is a plate-shaped member configured so that the position can be changed relative to the base portion 31, and the fitting roller 24 is supported by the plate-shaped member.

The fitting roller 24 is attached to the moving portion 32 via a swing mechanism 26. Since the fitting roller 24 can be swung by the swing mechanism 26, if the inside of the pipe 1 for forming the rehabilitation pipe 2 is not smooth, it is formed along the wall surface or the wall surface thereof. Even if the surface of the rolled strip 3 is uneven due to the unevenness or step generated on the surface of the rehabilitation pipe 2, the joiner 4 can be appropriately pressed along the unevenness.

The moving mechanism 33 is a mechanism for arbitrarily moving the moving portion 32 with respect to the base portion 31, and is a bolt-shaped member that can be screwed into the guide rail 35, the bolt screwing portion 36, and the female screw hole 37. 38, a guide shoe 39, and a screw driven portion 40 are provided.

The guide rail 35 is a member provided on the base portion 31, and the guide shoe 39 slides along the guide rail 35.

The bolt screwing portion 36 is provided at a position of the base portion 31 sandwiched between the guide rails 35. A female screw hole 37 is formed in the bolt screwing portion 36 along the traveling direction of the pipe making machine 10.

The bolt-shaped member 38 is composed of a half-screw hexagon bolt, and is configured such that the male screw portion 381 is screwed into the female screw hole 37.

The length of the male screw portion 381 corresponds to the amount of movement of the fitting roller 24 with respect to the fitting arm 20 by the moving mechanism 33. In the present embodiment, the strip 3 is spirally wound and has the same length as the width along the traveling direction of the pipe making machine 10.

In the present embodiment, the effective width of the strip 3 is 123 mm and the effective width of the joiner 4 is 42 mm. Therefore, the effective width of one roll of the rehabilitation tube 5 is 165 mm (= 123 mm + 42 mm). The amount of movement of the fitting roller 24 by the moving mechanism 33 with respect to the fitting arm 20 is set to 165 mm, which is the effective width of one roll of the rehabilitation tube 5. In this way, the moving mechanism 33 sets the position of the fitting roller 24 on the fitting arm 20 in the traveling direction of the pipe making machine 10 of the strip 3 spirally wound before and after the traveling direction of the pipe making machine 10. The distance corresponding to one roll of the rehabilitation tube 5 can be moved along the width of the rehabilitation tube 5.

Since the moving mechanism 33 is configured to move the fitting arm 20 relative to the fitting arm 20 by screwing the bolt-shaped member 38, the position of the fitting roller 24 in the fitting arm 20 Can be adjusted steplessly within the range of movable distance.

Flange 383 and 384 are provided in the lower part of the neck of the bolt-shaped member 38 directly below the head head 382 and at the boundary between the male screw portion 381 and the portion other than the male screw portion 381.

The guide shoe 39 is a member provided on the moving portion 32, and when the guide shoe 39 slides on the guide rail 35, the moving portion 32 moves with respect to the base portion 31.

The screwing driven portion 40 is provided at a position of the moving portion 32 sandwiched between the guide shoes 39. The screwing driven portion 40 is a member having a U-shaped groove portion that opens toward the base portion 31. The width of this groove is such that the lower part of the neck surrounded by the flange 383 and the flange 384 of the bolt-shaped member 38 can penetrate.

As the screwing driven portion 40 and the bolt-shaped member 38 are screwed with respect to the bolt screwing portion 36, they follow and move in a manner of being in contact with the flange 383 or the flange 384. As a result, the moving portion 32 moves relative to the base portion 31. The operation of the bolt-shaped member 38 is performed by turning the head 382 of the bolt-shaped member 38 using a tool such as a ratchet. The initial position of the fitting roller 24 with respect to the fitting arm 20 is the center of the movable range so that the fitting roller 24 can be moved forward and backward from the current position in the work of forming the rehabilitation pipe 2. Is preferable.

The fixing mechanism 34 is composed of a hand knob. The hand knob is screwed to the moving portion 32 so that the threaded portion penetrates the moving portion 32. The tip of the screw portion of the hand knob comes into contact with or separates from the flange 384, and the movement of the moving portion 32 with respect to the base portion 31 by the moving mechanism 33 is prevented or allowed.

The alignment of the fitting roller 24 by the moving mechanism 33 is performed in a state where the fitting arm 20 is contracted and the fitting roller 24 is separated from the strip 3 and the joiner 4 to be fitted.

When the fitting roller 24 is located behind the joiner 4, the fitting roller 24 can be moved forward by the position adjusting mechanism 30 (see FIG. 3). On the contrary, when the fitting roller 24 is in front of the joiner 4, the fitting roller 24 can be moved backward by the position adjusting mechanism 30 (see FIG. 4). In this way, in the work of forming the rehabilitation pipe 2, the fitting roller 24 can be easily moved to a position where the joiner 4 can be appropriately pressed.

In particular, the position of the joiner 4 to be pressed tends to move back and forth with respect to the fitting roller 24 because the longest distance and the shortest distance between the facing wall surfaces are significantly different, such as a rectangular or horseshoe-shaped cross section of the pipe 1. Even in this case, the position of the fitting roller 24 can be easily adjusted.

In the above-described embodiment, the case where the position adjusting mechanism 30 is provided only with the fitting unit 19 has been described, but the present invention is not limited to this. The position adjusting mechanism 30 may be provided in both the fitting unit 19 and the auxiliary fitting unit 21, or may be provided only in the auxiliary fitting unit 21.

In the above-described embodiment, the moving mechanism 33 has described the case where the bolt-shaped member 38 is manually operated, but the bolt-shaped member 38 may be operated by an actuator such as an air motor.

Further, the moving mechanism 33 is not limited to the configuration using the bolt-shaped member 38. For example, it may be configured by using a slider crank mechanism or a rack and pinion. For example, if the moving mechanism 33 is a rack and pinion, a rack is arranged in the moving portion 32 along the front-rear direction in the traveling direction of the pipe making machine 10, and a pinion that meshes with the rack is arranged on the side of the base portion 31. To place. When the pinion is rotated, the rack that meshes with the pinion moves, and therefore the moving portion 32 moves.

Further, the position adjusting mechanism may include, for example, a fixing mechanism in which the moving portion 32 is movable with respect to the base portion 31 and the sliding can be fixed at a predetermined position or an arbitrary position. For example, the fixing mechanism may have a configuration in which the moving portion 32 and the base portion 31 are fastened with a common bolt-shaped member and nut. At that time, a plurality of bolt holes on the moving portion 32 or the base portion 31 side are provided along the traveling direction and fastened to an arbitrary bolt hole to connect the moving portion 32 and the base portion 31. The relative position may be configured to be adjustable. Further, the bolt holes on the moving portion 32 side or the base portion 31 side may be formed of elongated holes.

The position adjusting mechanism 30 is not limited to a configuration that is manually operated by an operator, but is used in a pipe making machine such as an air motor mechanism including an air motor and a transmission mechanism composed of a plurality of gears, a double-acting air cylinder mechanism, and the like. The configuration may be driven by a mechanism driven by the pressure of air supplied from the outside.

In the above-described embodiment, the case where the strip 3 and the joiner 4 are supplied from the front in the traveling direction of the pipe making machine 10 has been described, but the present invention is not limited to this. For example, only the strip 3 may be supplied from the front in the traveling direction of the pipe making machine 10, and the joiner 4 may be supplied from the rear in the traveling direction of the pipe making machine 10. Further, the strip 3 and the joiner 4 may be manually sent to the feed unit 17 by an operator, or may be sent by a guide unit provided in front of the feed unit 17.

In the above-described embodiment, the case where the rehabilitation tube 2 is composed of the strip 3 and the joiner 4 has been described, but the rehabilitation tube 2 may be composed of only the strip 3. In this case, one end edge of the strip 3 is provided with a fitting portion, and the other end edge is provided with a fitting portion that fits with the fitting portion. The fitting roller 24 presses the strip 3 wound up later to fit the fitting portion provided on the strip 3 and the fitting portion provided on the previously wound strip 3. As a result, the rehabilitation tube 2 is formed.

In the above-described embodiment, the case where the culvert 1 has a rectangular cross-sectional shape has been described as an example, but the cross-sectional shape of the culvert 1 is not limited to a rectangular shape, and may be circular or non-circular, for example, a horseshoe shape. There may be.

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: Pipe culvert 2: Rehabilitation pipe 3: Strip 4: Joiner 5: Fitting arm 51: Fitting convex part 52: Fitting concave part 10: Pipe making machine 11: Main body part 16: Shaft 19: Fitting unit 20: Fitting Joint arm 24: Fitting roller 30: Position adjusting mechanism 31: Base portion 32: Moving portion 33: Moving mechanism 34: Fixing mechanism 35: Guide rail 36: Bolt screwing portion 37: Female screw hole 38: Bolt-shaped member 381 : Male screw part 382: Head 383: Flange 384: Flange 39: Guide shoe 40: Screw-on driven part 42: Moving part

Claims (6)

A pipe making machine that forms a rehabilitated pipe by connecting strips spirally wound at a predetermined pitch to the wall surface of a pipe directly or indirectly via a joiner.
A main body that can run inside the pipe and
A shaft extending forward in the traveling direction of the pipe making machine and being rotatable in the main body,
A fitting arm that is rotatably supported on the shaft integrally with the shaft,
The strip provided on the fitting arm and wound later is pressed toward the strip wound earlier to be fitted with the strip, or arranged so as to straddle the strips. A fitting roller that presses the formed joiner toward the strip to fit the strip and the joiner.
A pipe making machine provided with a position adjusting mechanism capable of adjusting the position of the fitting roller with respect to the fitting arm back and forth along the traveling direction of the pipe making machine. The position adjusting mechanism includes a base portion provided on the fitting arm and a moving portion configured so that the position can be changed relative to the base portion while supporting the fitting roller. The pipe making machine according to claim 1, further comprising a moving mechanism for moving the moving portion with respect to the base portion. The moving mechanism positions the moving portion with respect to the base portion in a width before and after the traveling direction of the pipe making machine, at least along the traveling direction of the spirally wound strip. The pipe making machine according to claim 2, which is configured to be movable over. The pipe making machine according to claim 2 or 3, wherein the moving mechanism is configured so that the position of the moving portion with respect to the base portion can be adjusted steplessly. The moving mechanism includes a guide rail provided on the base portion, a bolt screwing portion provided on the base portion, and a bolt capable of being screwed into a female screw hole formed in the bolt screwing portion. A member, a guide shoe provided on the moving portion and slidable on the guide rail, and a moving portion provided on the moving portion through which the bolt-shaped member is loosened and screwed by the bolt-shaped member. The pipe making machine according to any one of claims 2 to 4, further comprising a screw driven portion for following movement. The pipe making machine according to any one of claims 2 to 5, wherein the position adjusting mechanism includes a fixing mechanism for fixing the movement of the moving portion by the moving mechanism.

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