JP2018075749A - Feeding unit and tube manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding unit that enables a pipe rehabilitation member to be appropriately and easily wound on a whole circumference of wall surfaces of a pipe culvert even when the longest distance and the shortest distance between opposing wall surfaces of the pipe culvert are significantly different from each other.SOLUTION: There is provided a feeding unit 30 which is included in a tube manufacturing machine that forms a tubular body 3 by pressing, onto wall surfaces of a pipe culvert P, a strip 1 supplied from ahead in an advancing direction with the use of an interlocking roller 22 that moves along the wall surfaces of the pipe culvert P. In the advancing direction ahead of an interlocking unit 20 having the interlocking roller 22, there are provided an arm 31 supported by a shaft 15 having a rotational shaft center formed along a shaft center of the pipe culvert P; a feeding mechanism 32 that is formed on the arm 31 and feeds the strip 1 in a rear obliquely outward direction with respect to a rotational direction of the arm 31; and a moving mechanism that, by expanding and contracting the arm 31, moves the feeding mechanism 32 along the wall surfaces. The strip 1 is fed onto the wall surfaces that are ahead of the advancing direction of the interlocking roller 22.SELECTED DRAWING: Figure 5

Description

  The present invention provides a feed unit provided in a pipe making machine that forms a tubular body by pressing a pipe rehabilitation member supplied from at least the front in the traveling direction against the wall surface by a fitting roller that moves along the wall surface of the pipe. About.

  Traditionally, pipe rehabilitation members made of synthetic resin such as hard vinyl chloride and joiner are fed into an aged pipe, and the strip is spirally wound around the wall of the pipe using a pipe making machine. On the other hand, a pipe manufacturing method is known in which adjacent strips are joined by a joiner to form a tubular body on the wall surface of the pipe.

  As a pipe making machine, Patent Document 1 discloses a pipe making machine in which a vehicle body is provided with an operation unit, a traveling unit, a turning unit, and the like.

  The turning unit includes a rotation shaft that rotates around a rotation axis that extends forward in the traveling direction of the vehicle body. The rotating shaft is provided with a plurality of arms, and each arm is provided with a guide unit, a feed unit, and a fitting unit in this order from the front in the traveling direction of the vehicle body.

  The guide unit guides the strip supplied from the front in the traveling direction of the vehicle body to the feed unit.

  The feeding unit includes a plurality of rollers that can be driven by a motor, draws the strip guided from the guiding unit by the rollers, and feeds it to the wall surface of the pipe. As a result, the strip is spirally wound around the wall surface of the tube.

  A cylinder is built in the arm provided with the fitting unit, and the arm is extended by the cylinder, whereby the fitting unit is biased toward the wall surface of the pipe. A roller is provided in the fitting unit, and the fitting groove of the joiner is pressed and fitted into the fitting groove provided in the strip. In this way, a tubular body is formed on the wall surface of the tube.

JP 2013-199097 A

  As described above, the strip is fed to the wall surface of the pipe by the feeding unit, but has the following problems.

  When the cross section of the tube is circular, the distance between the opposing wall surfaces is almost constant, so the distance from the feeding unit to the wall surface of the tube is kept almost constant, so the strip is almost It is pressed against the wall surface of the tube with a certain force and wound up stably. The work is also relatively easy.

  However, if the cross-sectional shape of the tube is a shape in which the longest distance and the shortest distance between the opposing wall surfaces are significantly different, such as a rectangle or horseshoe shape, the distance from the feed unit to the wall surface of the tube is the rotation of the arm. It changes according to. In particular, when the distance from the feeding unit to the wall surface of the tube is long, the pressing of the strip against the wall surface of the tube is weakened, or the fed strip is bent until it reaches the wall surface of the tube, so that the strip There was a possibility that the product could not be wound up and the quality of the finished tubular body was deteriorated.

  In addition, when the cross section of the tube is a tube having a corner, such as a rectangle or a horseshoe shape, in order to wind the strip along the wall of the tube by the feeding unit, Needs to feed more strips than non-corner parts. For this purpose, a complicated operation for finely adjusting the feed speed of the feed unit, the rotation speed of the arm, the traveling speed of the pipe making machine, and the like is necessary.

  The present invention has been made in view of the above-described problems, and even if the longest distance and the shortest distance between the opposing wall surfaces are greatly different, the pipe rehabilitation member over the entire circumference of the wall surface of the pipe. It is an object of the present invention to provide a feed unit that can wind up the pipe appropriately and easily, and a pipe making machine equipped with the feed unit.

  In order to achieve the above object, the feed unit according to the present invention is characterized in that a pipe rehabilitation member supplied at least from the front in the traveling direction is pressed against the wall surface by a fitting roller that moves along the wall surface of the pipe wall. A feed unit provided in a pipe making machine for forming a tubular body, and having a rotation axis along the axis of the tube in front of the fitting unit having the fitting roller in the traveling direction. An arm body supported by a shaft; a feed mechanism that is provided on the arm body and feeds the tube rehabilitation member in a diagonally outward direction rearward of the rotation direction of the arm body; and the feed mechanism by extending and contracting the arm body. A moving mechanism that moves along the wall surface, and is configured to send the tube rehabilitation member to the wall surface of the tube in front of the path of the fitting roller.

  According to the above configuration, even if the longest distance and the shortest distance between opposing wall surfaces are very different, such as a rectangular or horseshoe-shaped tube, the feed mechanism is always Since the pipe rehabilitation member can be sent out from a position appropriately spaced from the wall surface, and the pipe rehabilitation member can be wound up appropriately and easily over the entire circumference of the wall surface of the pipe, the quality of the tubular body can be improved. The moderately spaced position is a position determined according to the rigidity of the pipe rehabilitation member. When the rigidity of the pipe rehabilitation member is low, the position is closer to the wall surface, and when the rigidity is high, the position is farther from the wall surface.

  In the present invention, the moving mechanism travels on the wall surface or the surface of the pipe retreading member spirally wound around the wall surface, and urges the traveling mechanism toward the wall surface or the surface. It is preferable that an urging mechanism is provided.

  According to the above-described configuration, the distance from the wall surface of the feed mechanism can be maintained while the travel mechanism is simply pressed against the wall surface of the pipe or the surface of the pipe rehabilitation member by the urging mechanism.

  In the present invention, it is preferable that the traveling mechanism is provided with a front wheel and a rear wheel on the downstream side in the feeding direction of the pipe rehabilitation member by the feeding mechanism.

  According to the above-described configuration, the traveling mechanism first contacts the front wheel with respect to a certain wall surface or surface as the arm body rotates, then the rear wheel also contacts the ground, then the front wheel separates, and the rear wheel also In accordance with the separation, the feeding angle of the pipe rehabilitation member with respect to a certain wall surface or surface can be changed to an appropriate state.

  In the present invention, it is preferable that the diameter of the front wheel is larger than the diameter of the rear wheel.

  According to the above-described configuration, since the front wheel is large, the traveling mechanism can be stably grounded with respect to the wall surface or the surface.

  In order to achieve the above-mentioned object, the characteristic configuration of the pipe making machine according to the present invention is such that at least the pipe rehabilitation member supplied from the front in the traveling direction is moved to the wall surface by a fitting roller that moves along the wall surface of the pipe wall. A pipe making machine that presses to form a tubular body, which is provided with a feeding unit having the above-described characteristic configuration.

  According to the above configuration, even if the longest distance and the shortest distance between opposing wall surfaces differ greatly, such as a rectangular or horseshoe-shaped tube tube, the feed mechanism always regenerates the tube from near the wall surface. Since the member can be fed out and the tube rehabilitation member can be wound up appropriately and easily over the entire circumference of the tube, the quality of the tubular body can be improved.

It is a schematic side view of a pipe making machine. It is a front view of a feed unit. It is a principal part enlarged view of a feed unit. It is a principal part enlarged view of a feed unit. It is explanatory drawing when a feed mechanism exists in the bottom center vicinity. It is explanatory drawing when a feed mechanism exists in the bottom right side. It is explanatory drawing when a feed mechanism exists in the corner | angular part vicinity of a bottom face and a right face. It is explanatory drawing when a feed mechanism exists in the right surface center vicinity. It is explanatory drawing when a feed mechanism exists in the corner | angular part vicinity of a right surface and a top surface. It is explanatory drawing when a feeding mechanism exists in the top | upper surface right side. It is explanatory drawing when a feed mechanism exists in the top surface center vicinity.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same code | symbol is attached | subjected to the same part or the corresponding part.

  As shown in FIG. 1, a pipe making machine 10 according to the present invention includes a strip 1 that is disposed in a tube pipe P having a rectangular cross-sectional shape and fed from the ground via a manhole (not shown), It is used to form a tubular body 3 from a joiner 2 which is an example of a scale fitting member.

  The strip 1 and the joiner 2 before use are stored in a circular shape on the ground around the manhole, drawn out during use, and spirally wound around the wall surface of the pipe P. In the present embodiment, the strip 1 and the joiner 2 are supplied from the front of the pipe making machine 10 in the traveling direction.

  The strip 1 and the joiner 2 are made of a material having a sufficient strength to cope with various environmental changes, for example, a synthetic resin such as hard vinyl chloride. A fitting groove is formed over the entire length of both side edges of the strip 1, and a fitting groove that fits into the fitting groove of the adjacent strip 1 is also formed on both side edges of the joiner 2.

  By making the strip 1 spirally wound around the wall surface of the pipe pipe P by the pipe making machine 10 and fitting the fitting groove of the joiner 2 into the fitting groove of the adjacent strip 1, the adjacent strips 1 are formed. The tubular body 3 is formed by fitting with the joiner 2. In the present embodiment, the pipe P has a rectangular cross-sectional shape, and a spacer S is arranged in advance on the top surface and corners of the pipe P, and the pipe P is interposed through the spacer S. By injecting a filler into the gap between the wall surface and the tubular body 3, the pipe P and the tubular body 3 are integrated.

  The pipe making machine 10 includes a drive unit 12, a turning unit 13, and the like in a vehicle body 11 that can travel in the pipe shaft P in the pipe axis direction. The vehicle body 11 is provided with wheels on a frame body made of stainless steel, for example, and is movable along the tube axis of the tube pipe P. An auxiliary wheel 14 extends toward the upper side and the side surface of the vehicle body 11. The auxiliary wheel 14 abuts on the top and side surfaces of the tubular body 3 formed on the wall surface of the pipe P, and assists the smooth running of the vehicle body 11.

  The drive unit 12 includes a motor, a transmission, and the like. The turning unit 13 is a unit that rotates the shaft 15 extending forward from the vehicle body 11 in the traveling direction based on the power of the drive unit 12.

  The shaft 15 is provided with a feed unit 30 and fitting units 20 and 21. As shown in FIG. 2, the feed unit 30 and the fitting units 20 and 21 are rotated about the axis of the shaft 15 by the rotation of the shaft 15. In the present embodiment, as shown in FIG. 2, the feed unit 30 and the fitting units 20 and 21 are configured to turn counterclockwise when viewed from the front of the pipe making machine 10.

  The pipe making machine 10 travels along the pipe axis direction of the pipe P while turning the feed unit 30 and the fitting units 20 and 21 around the shaft 15. Therefore, the feed unit 30 and the fitting units 20 and 21 advance in a spiral manner inside the pipe P.

  The feed unit 30 is a unit that pulls the strip 1 by a feed mechanism 32 described later and feeds the strip 1 at a predetermined angle along the wall surface of the pipe P in front of the path of the fitting roller 22 provided in the fitting unit 20. The feed unit 30 forms a certain angle with respect to the fitting unit 20 in the rotational direction front of the shaft 15 when the pipe making machine 10 is viewed from the front. The angle is appropriately adjusted according to the shape of the tube pipe P and the rigidity of the strip 1. The phrase “along the wall surface of the pipe tube P” includes not only along the wall surface of the tube wall P, but also along the surface of the spacer S arranged on the tube wall P.

  The fitting unit 20 is a unit for fitting the joiner 2 to the adjacent strips 1 spirally wound around the wall surface of the pipe P in front of the fitting roller 22 by the feeding unit 30.

  The fitting roller 22 of the fitting unit 20 is provided at the tip of the arm body 24 supported by the shaft 15. A double-acting air cylinder mechanism is built in the arm body 24, and can be expanded and contracted by the pressure of air supplied from an air compressor (not shown) through a tube. The fitting roller 22 is urged toward the wall surface by the extension of the arm body 24 by the air cylinder mechanism.

  The fitting unit 21 includes a fitting roller 23, and is a unit that presses the joiner 2 fitted to the strip 1 by the fitting unit 20 again with the fitting roller 23. This ensures that the joiner 2 is fitted to the strip 1.

  The fitting roller 23 of the fitting unit 21 is provided at the tip of the arm body 25 supported by the shaft 15. A double-acting air cylinder mechanism is built in the arm body 25, and can be expanded and contracted by the pressure of air supplied from an air compressor (not shown). The fitting roller 23 is urged toward the wall surface by the extension of the arm body 25 by the air cylinder mechanism.

  The arm bodies 24 and 25 are disposed at an angle of 180 degrees when the pipe making machine 10 is viewed from the front. The fitting roller 22 disposed on the arm body 24 is half the winding of the strip 1 spirally wound around the wall surface of the pipe P than the fitting roller 23 disposed on the arm body 25. It is arranged forward in the traveling direction by a corresponding distance.

  By fitting the strip 1 and the joiner 2 by the fitting units 20 and 21 as described above, the tubular body 3 composed of the strip 1 and the joiner 2 is formed in the pipe tube P.

Hereinafter, the feeding unit 30 will be described in detail.
As shown in FIGS. 3 and 4, the feed unit 30 is provided on the arm body 31 supported by the shaft 15 in front of the fitting unit 20 in the traveling direction, and a feed mechanism 32 that pulls in and feeds the strip 1; And a travel mechanism 33 that travels on the surface of the strip 1 spirally wound around the wall surface of the pipe P.

  The feed mechanism 32 has a pair of feed rollers 34 and 35 sandwiching the front and back of the strip 1, a drive motor 36 that rotates the feed roller 34, and a transmission mechanism 37 that transmits the power of the drive motor 36 to the feed roller 34 and the feed roller 35. Etc. are provided.

  The feed rollers 34 and 35 are disposed so as to have a gap of a distance for sandwiching the strip 1 in order to pull in and feed out the strip 1. Each of the feed rollers 34 and 35 has a shaft portion supported by a bearing, and the shaft portion is engaged with gears constituting the transmission mechanism 37 at one end portion. With this configuration, the feed rollers 34 and 35 rotate in opposite directions.

  In order to stabilize the drawing-in of the strip 1 with respect to the feed rollers 34 and 35 and the feeding direction of the strip 1 from the feed rollers 34 and 35, the rotation axis of the feed rollers 34 and 35 is orthogonal to the front and rear of the feed rollers 34 and 35. A plurality of guide rollers 38 having a rotation axis are provided. The strip 1 is guided by the guide roller 38 in the width direction position with respect to the feed rollers 34 and 35.

  The feeding mechanism 32 is installed so as to feed the strip 1 diagonally outward and rearward in the rotational direction of the arm body 31, and the installation angle is appropriately adjusted according to the shape of the pipe P and the rigidity of the strip 1. The

  The feeding speed of the strip 1 by the feeding unit 30 corresponds to the width of the joiner 2 with a predetermined interval between the fitting grooves of adjacent strips 1 in consideration of the traveling speed of the pipe making machine 10. It is set so that it can be spirally wound along the wall surface of the tube pipe P with an interval to be made.

  The traveling mechanism 33 is provided with a front wheel 39 and a rear wheel 40 on the downstream side in the feeding direction of the strip 1 by the feeding mechanism 32. The installation angles of the front wheel 39 and the rear wheel 40 are appropriately adjusted according to the shape of the pipe P and the rigidity of the strip 1.

  The front wheel 39 and the rear wheel 40 are composed of a stainless steel wheel and a resin tire. The front wheel 39 and the rear wheel 40 are pivotally supported by a stainless steel stay 41 attached to the side of the feed mechanism 32 on the rear side in the traveling direction of the pipe making machine 10. The diameter of the front wheel 39 is larger than the diameter of the rear wheel 40.

  The arm body 31 has a built-in double-acting air cylinder mechanism as an urging mechanism, and can be expanded and contracted by the pressure of air supplied from an air compressor (not shown). By extension of the arm body 31 by the air cylinder mechanism, the front wheel 39 and the rear wheel 40 of the traveling mechanism 33 are urged toward the surface of the strip 1 spirally wound around the wall surface of the pipe P. Note that the arm body 31 has the rod and piston of the air cylinder mechanism that are caused by the reaction force that the front wheel 39 and the rear wheel 40 receive from the surface of the strip 1 spirally wound around the wall surface of the pipe P. It is shortened in such a manner that the cylinder is retracted against the pressure of air supplied to the cylinder mechanism.

  Therefore, the feed mechanism 32 is always in a state where at least either the front wheel 39 or the rear wheel 40 of the travel mechanism 33 travels along the surface of the strip 1 spirally wound around the wall surface of the pipe P. It is moved along the surface of the strip 1 spirally wound around the wall surface of the pipe P. That is, when at least the front wheel 39 or the rear wheel 40 travels on the surface of the strip 1 spirally wound around the wall surface of the pipe P, the feed mechanism 32 moves along the wall surface. The travel mechanism 33 and the air cylinder mechanism constitute a moving mechanism that moves the feed mechanism 32 along the wall surface.

  The arm body 31 is composed of a stainless steel fixed case 31a and a movable case 31b each having a bottomed cylindrical shape and telescopically configured. The cylinder of the air cylinder mechanism is fixed to the inner surface of the fixed case 31a, and the rod of the air cylinder mechanism is fixed to the inner surface of the moving case 31b. The moving case 31b is disposed so as to be movable in the gap between the outer surface of the cylinder and the inner surface of the fixed case 31a as the rod advances and retreats. The fixed case 31 a is attached to the shaft 15 via a support portion 42. The fixed case 31 a is configured such that the attachment position to the support portion 42 can be adjusted along the longitudinal direction of the arm body 31.

  The manner in which the strip 1 is wound around the wall surface of the pipe P from the bottom surface to the top surface by the feeding unit 30 configured as described above will be described with reference to FIGS. The same applies from the top surface to the bottom surface.

  As shown in FIG. 5, when the feed mechanism 32 is near the center of the bottom surface of the pipe P when the pipe making machine 10 is viewed from the front, the front wheel 39 of the travel mechanism 33 is the wall of the pipe P. It runs on the surface of the strip 1 spirally wound around the bottom wall surface. The fed strip 1 is wound around the bottom wall surface in front of the path of the fitting roller 22.

  When the shaft 15 is rotated and the feed mechanism 32 moves to the right of the bottom surface of the pipe pipe P when the pipe making machine 10 is viewed from the front, as shown in FIG. It runs on the surface of the strip 1 spirally wound around the bottom wall surface of the wall surface of the pipe P. The fed strip 1 is wound around the bottom wall surface in front of the path of the fitting roller 22.

  When the shaft 15 rotates and the feed mechanism 32 moves to the vicinity of the corners of the bottom surface and the right surface of the pipe cutter P when the pipe making machine 10 is viewed from the front, as shown in FIG. The wheel 40 travels on the surface of the strip 1 spirally wound around the corner wall surface of the wall surface of the tube pipe P. The fed strip 1 is wound around the bottom wall surface in front of the path of the fitting roller 22.

  When the shaft 15 rotates and the feed mechanism 32 moves near the center of the right side of the pipe P when the pipe making machine 10 is viewed from the front as shown in FIG. It runs on the surface of the strip 1 spirally wound around the side wall surface of the wall surface of P. The fed strip 1 is wound around a corner wall surface in front of the path of the fitting roller 22.

  When the shaft 15 rotates and the feed mechanism 32 moves near the corners of the right surface and the top surface of the tube pipe P as seen from the front as shown in FIG. The front wheel 39 travels on the surface of the strip 1 spirally wound around the corner wall surface of the wall surface of the pipe P. The fed strip 1 is wound around the side wall surface in front of the path of the fitting roller 22.

  When the shaft 15 is rotated and the feed mechanism 32 moves to the right of the top surface of the pipe plate P when the pipe making machine 10 is viewed from the front as shown in FIG. It runs on the surface of the strip 1 spirally wound around the top wall of the wall surface of the pipe P. The fed strip 1 is wound around the side wall surface in front of the path of the fitting roller 22.

  When the shaft 15 rotates and the feed mechanism 32 moves to the vicinity of the center of the top surface of the pipe plate P when the pipe making machine 10 is viewed from the front, as shown in FIG. It runs on the surface of the strip 1 spirally wound around the top wall of the wall surface of the pipe P. The fed strip 1 is wound around the top wall in front of the path of the fitting roller 22.

  With the above-described configuration, the feeding unit 30 feeds the strip 1 while sliding while maintaining a substantially constant distance with respect to the wall surface, and the fed strip 1 is firmly pressed against the wall surface of the pipe P. Therefore, the floating from the wall surface is minimized. The joiner 2 is fitted to the strip 1 in this state by the fitting roller 22. Therefore, even if the pipe P is different in the longest distance and the shortest distance between the opposing wall surfaces, the feeding mechanism 32 always feeds the strip 1 from a position close to the wall surface. 1 can be wound up appropriately and easily.

  In the above-described embodiment, the front wheel 39 and the rear wheel 40 are spirally formed on the wall surface of the pipe pipe P by the stay 41 being attached to the side surface of the feed mechanism 32 on the rear side in the traveling direction of the pipe making machine 10. The front wheel 39 and the rear wheel 40 traveled on the surface of the strip 1 wound around, but the strip 1 still remains when the stay 41 is attached to the side of the feed mechanism 32 in the forward direction of the pipe making machine 10. You may be comprised so that it may drive | work the wall surface of the pipe P which is not wound up.

  In the above-described embodiment, the configuration in which the feed mechanism 32 is urged against the surface of the strip 1 by the air cylinder mechanism built in the arm body 31 has been described. However, the feed mechanism 32 is built in the arm body 31. It may be configured to be biased to the surface of the strip 1 by a hydraulic cylinder mechanism, or may be biased to the surface of the strip 1 by an elastic body such as a compression coil spring built in the arm body 31. Also good.

  In the above-described embodiment, the configuration in which the strip 1 and the joiner 2 are supplied from the front in the traveling direction of the vehicle body 11 has been described. However, only the strip 1 is supplied from the front in the traveling direction of the vehicle body 11. The structure supplied from back may be sufficient.

  Further, the strip 1 and the joiner 2 may be sent manually to the feeding unit 30 by an operator, or may be sent by a guide unit provided in front of the feeding unit 30.

  In the above-described embodiment, the case where the pipe rehabilitation member is configured by the strip 1 and the joiner 2 has been described. However, the pipe rehabilitation member may be configured by only the strip 1. In this case, one end edge of the strip 1 is provided with a fitting groove, and the other edge is provided with a fitting groove that fits into the fitting groove.

  In the above-described embodiment, the case where the pipe tube P has a rectangular cross-sectional shape has been described as an example. However, the cross-sectional shape of the tube tube P is not limited to a rectangular shape, and may be circular or non-circular, for example, It may be a horseshoe shape.

  Each of the above-described embodiments is an example of the present invention, and the present invention is not limited by the description. The specific configuration of each part can be appropriately changed and designed within the range where the effects of the present invention are exhibited. is there.

1: Strip (pipe rehabilitation member)
2: Joiner 3: Tubular body 10: Pipe making machine 15: Shaft 20: Fitting unit 21: Fitting unit 22: Fitting roller 23: Fitting roller 24: Arm body 25: Arm body 30: Feed unit 31: Arm Body (movement mechanism)
32: Feed mechanism 33: Traveling mechanism (moving mechanism)
34: Feed roller 35: Feed roller 39: Front wheel 40: Rear wheel

Claims (5)

A feed unit provided in a pipe making machine that forms a tubular body by pressing against a wall surface by a fitting roller that moves along a wall surface of a pipe tube at least from a tube regenerating member that is supplied from the front in the traveling direction,
An arm body supported by a shaft having a rotation axis along the axis of the tube in front of the fitting unit having the fitting roller in the traveling direction;
A feed mechanism that is provided on the arm body and feeds the pipe rehabilitation member diagonally outward in the rear direction of the rotation direction of the arm body;
A moving mechanism that moves the feeding mechanism along the wall surface by expanding and contracting the arm body,
A feed unit configured to send the pipe rehabilitation member to the wall surface in front of the path of the fitting roller. In the moving mechanism,
A traveling mechanism that travels on the surface of the pipe retreading member wound spirally around the wall surface or the wall surface;
The feeding unit according to claim 1, further comprising: an urging mechanism that urges the traveling mechanism toward the wall surface or the surface.   The feed unit according to claim 2, wherein the travel mechanism includes a front wheel and a rear wheel on a downstream side in the feed direction of the pipe rehabilitation member by the feed mechanism.   The feeding unit according to claim 3, wherein a diameter of the front wheel is larger than a diameter of the rear wheel.   5. A pipe making machine for forming a tubular body by pressing a pipe rehabilitation member supplied at least from the front in the advancing direction against the wall surface by a fitting roller that moves along the wall surface of the pipe wall. A pipe making machine provided with the feed unit according to any one of the above.

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