JP5824504B2 - Spiral-winding free cross-section pipe making apparatus provided with auxiliary roller mechanism, and method for making a lining pipe using the pipe making apparatus - Google Patents

Description

The present invention relates to a pipe making apparatus and a pipe making method for making a lining pipe by forming a tubular body by spirally winding a long plate-like band-shaped member and making a lining pipe by self-propelling (self-propelled) movement. More specifically, a belt-like member provided with plastic deformability is used, moves along a rigid restricting frame via a guide element, and has a bending mechanism having a joining mechanism portion composed of an inner roller and an outer roller. The present invention relates to a lining pipe making apparatus and a lining pipe making method, comprising a flexible forming frame, and winding a belt-like member in a spiral shape to produce a lining pipe having a free cross-sectional shape.
In particular, the present invention relates to a pipe lining construction apparatus and a lining in the pipe for inserting a tubular body into the inner surface of an existing pipe such as a sewer pipe, a water pipe and a gas pipe, and constructing a lining layer. It relates to the construction method.

According to Japanese Patent Laid-Open Nos. Hei 8-261363 and 2001-138398, the present applicant previously arranged a restricting frame that holds a rigid shape and a guide roller on the outer periphery thereof, and the restricting frame is interposed via a guide element. We proposed a self-propelled spiral-fired lining construction method that uses a lining pipe-making device consisting of a movable molding frame that is arranged around. According to this self-propelled spiral-fired lining construction method, any pipe rod targeted for lining can be provided with a lining having a free cross-sectional shape, which is epoch-making.
In this self-propelled spiral-fired lining construction method, the regulating frame and the forming frame take a specific phase relationship, and the forming frame forms the lining pipe and moves in the circumferential direction of the pipe and the axis of the pipe. The restricting frame also obtains thrust in the forward direction from the forming frame via the guide and moves in the axial direction of the pipe rod together with the forming frame. However, at this time, the restricting frame obtains a thrust force due to contact with the guide, so the guide has problems such as rubbing against the restricting frame, pulling and rubbing, or one-sided contact. This causes a phenomenon in which the roller is caught in the restriction frame, causing a problem in the lining construction operation.
Therefore, the present applicant has proposed Japanese Patent Application No. 2007-319653 (Japanese Patent Laid-Open No. 2009-144744) (hereinafter referred to as the prior invention) and has attempted to solve the above problems.
However, in the prior invention, the posture retention of the restriction frame is based on a structure that relies on the molding frame. Therefore, the operation of the molding frame is directly transmitted to the restriction frame, which causes a rotating operation on both frames. Yes. Furthermore, when the joining mechanism portion consisting of the inner surface roller and the outer surface roller moves on the bottom side of the pipe rod, the outer surface roller (or feed roller) of the joining mechanism portion becomes a support point and becomes unstable, and the molding frame and the regulation are restricted. The relationship (relative) position with the frame collapses and becomes a cause of rattling.

JP 2009-144744 A

The present invention is a further development of the prior invention, and in a self-propelled spiral-fired lining pipe manufacturing apparatus having this type of restriction frame, harmful interference between the forming frame and the restriction frame (backlash, rotation). An object of the present invention is to obtain a lining pipe making apparatus that can smoothly perform the pipe making operation of the lining pipe by smoothly moving the restriction frame following the forward movement of the pipe making apparatus.
It is another object of the present invention to obtain a pipe making method using the lining pipe making apparatus.
It is another object of the present invention to obtain a lining construction apparatus in construction in a pipe tub and a lining construction method in the pipe rim made using the lining construction apparatus.
For this reason, the present invention pays attention to the positional (or shape) relationship between the regulating frame and the lining pipe to be formed, and it is possible to achieve this purpose by holding the regulating frame independently using the positional relationship. It was made based on knowledge.

Specifically, the spirally wound free-section pipe-forming apparatus provided with the auxiliary roller mechanism of the present invention and the lining pipe forming method using the pipe-making apparatus have the following configurations.
(First invention)
A first aspect of the present invention relates to a lining pipe making apparatus, and as described in claim 1,
A tubular lining pipe formed by spirally winding a long belt-like member with plastic deformation that is continuously supplied and formed with joints on both side edges, and joining the joints that are in contact with each other. The additional lining pipe is additionally formed with a band-shaped member newly supplied to the front of the already formed lining pipe.
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that contacts the inner surface of the additional lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to be freely rotatable.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
Comprising an auxiliary roller mechanism,
It is characterized by that.
The first invention is an inventive concept that is more specifically shown in the following embodiment and extracted from the embodiment.
In the above,
B) The “predetermined shape” adopted by the restriction frame is represented by a quadrangle (including a square, a rectangle, and even an unequal shape), and includes a triangle, a polygon (pentagon, hexagon), and the like, and includes a horseshoe shape. The horseshoe shape can be regarded as a triangle or a pentagon. Therefore, these shapes have corners.
B) “Pipe axis direction” and “outward” indicating the positional relationship are for the lining pipe to be molded, and “front part” and “rear part” are for the traveling direction of the apparatus.

(Function)
In assembling the pipe manufacturing apparatus for the lining, an auxiliary roller mechanism is attached to the restriction frame, and the pushing bolt of the auxiliary roller mechanism is retracted inward.
The initial lining pipe is formed by driving the joining mechanism portion of the lining pipe making apparatus. That is, by driving the joining mechanism portion of the present apparatus, the forming frame is restrained by the restriction frame, moves in the circumferential direction along the shape of the restriction frame, and moves forward in the axial direction. At the same time, the belt-like member is wound spirally, and the lining pipe is formed into the shape of the restriction frame. One turn of the molding frame is one turn of the belt-like member.
Along with this, the abutting roller of this auxiliary roller mechanism is pushed outward by the screwing advance of the pushing bolt, and the corresponding contacting roller is moved to the initial lining pipe (the lining pipe immediately after being wound around the forming frame). It is pressed against the inner surface, and the cross section of the lining pipe is held in the cross section of the molding frame at this position. Thus, the pressing force transmitted through the contact roller of each auxiliary roller mechanism having a symmetrical arrangement is canceled in the restriction frame, and the restriction frame is held independently in the lining pipe.
Further, the lining pipe is manufactured by driving the joining mechanism portion of the apparatus, but the lining pipe behind the contact roller of the auxiliary roller mechanism receives an elastic return action and takes its original cross section.
Further, the auxiliary roller mechanism of the present pipe making apparatus is installed at the corner of the lining pipe having a square cross section, and the contact roller is wide, so that the lining pipe does not slip in the circumferential direction.
Therefore, the pressing force acting on the restriction frame is balanced, and there is no movement of the restriction frame in the pipe circumferential direction. Since the restriction frame is held by itself, this lining does not cause rotation with the molding frame. The pipe making apparatus advances smoothly.

(Second invention)
A second aspect of the present invention relates to a method for producing a lining pipe, and as described in claim 4,
A tubular lining pipe formed by spirally winding a long belt-like member with plastic deformation that is continuously supplied and formed with joints on both side edges, and joining the joints that are in contact with each other. The additional lining pipe is additionally formed with a band-shaped member newly supplied to the front of the already formed lining pipe.
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that is in contact with the inner surface of the lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to freely rotate.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
It is carried out using a pipe making apparatus provided with an auxiliary roller mechanism,
Along with the molding of the additional lining pipe, the contact roller is pressed against the inner surface of the additional lining pipe that is separated from the molding frame, and the initial cross section of the additional lining pipe by the molding frame is maintained.
It is characterized by that.
The second invention is an invention concept that is more specifically shown in the following embodiment and extracted from the embodiment.
In the above,
B) The “predetermined shape” adopted by the restriction frame is represented by a quadrangle (including a square, a rectangle, and even an unequal shape), and includes a triangle, a polygon (pentagon, hexagon), and the like, and includes a horseshoe shape. The horseshoe shape can be regarded as a triangle or a pentagon. Therefore, these shapes have corners.
B) “Pipe axis direction” and “outward” indicating the positional relationship are for the lining pipe to be molded, and “front part” and “rear part” are for the traveling direction of the apparatus.

(Third invention)
3rd of this invention is related with the lining construction apparatus for pipes, As described in Claim 5,
In a pipe rod, a long strip-shaped member provided with plastic deformability that is continuously supplied and formed on both side edges is spirally wound, and the adjacent joints are joined together. The tubular lining pipe is left, and an additional lining pipe is additionally formed with a belt-like member newly supplied in front of the already formed lining pipe,
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In the construction apparatus which arranges a flexible forming frame and forms the additional lining pipe by the sandwiching and joining function between the inner roller and the outer roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that contacts the inner surface of the additional lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to be freely rotatable.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
Comprising an auxiliary roller mechanism,
It is characterized by that.
The third invention is an invention concept that is more specifically shown in the following embodiment and extracted from the embodiment.
In the above,
B) The “predetermined shape” adopted by the restriction frame is represented by a quadrangle (including a square, a rectangle, and even an unequal shape), and includes a triangle, a polygon (pentagon, hexagon), and the like, and includes a horseshoe shape. The horseshoe shape can be regarded as a triangle or a pentagon. Therefore, these shapes have corners.
B) “Pipe axis direction” and “outward” indicating the positional relationship are for the lining pipe to be molded, and “front part” and “rear part” are for the traveling direction of the apparatus.

(Fourth invention)
4th of this invention is related with the lining construction method in a pipe cage, As described in Claim 6,
In a pipe rod, a long strip-shaped member provided with plastic deformability that is continuously supplied and formed on both side edges is spirally wound, and the adjacent joints are joined together. The tubular lining pipe is left, and an additional lining pipe is additionally formed with a belt-like member newly supplied in front of the already formed lining pipe,
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that is in contact with the inner surface of the lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to freely rotate.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
It is carried out using a pipe making apparatus provided with an auxiliary roller mechanism,
Along with the molding of the additional lining pipe, the contact roller is pressed against the inner surface of the additional lining pipe that is separated from the molding frame, and the initial cross section of the additional lining pipe by the molding frame is maintained.
It is characterized by that.
The fourth invention is an inventive concept that is more specifically shown in the following embodiment and extracted from the embodiment.
In the above,
B) The “predetermined shape” adopted by the restriction frame is represented by a quadrangle (including a square, a rectangle, and even an unequal shape), and includes a triangle, a polygon (pentagon, hexagon), and the like, and includes a horseshoe shape. The horseshoe shape can be regarded as a triangle or a pentagon. Therefore, these shapes have corners.
B) “Pipe axis direction” and “outward” indicating the positional relationship are for the lining pipe to be molded, and “front part” and “rear part” are for the traveling direction of the apparatus.

According to the present invention, the restriction frame does not move in the pipe circumferential direction by the auxiliary roller mechanism and is held independently, so that the positional relationship between the restriction frame and the molding frame is always kept constant. Thereby, there is no rotation of a control frame and a shaping | molding frame, and lining construction operation is performed smoothly.
Furthermore, since the molding frame is supported by the regulation frame that is held by itself, wobbling of the molding frame accompanying the winding of the belt-like member is prevented, and the forward movement of the lining construction apparatus is performed smoothly. .
This auxiliary roller mechanism can adjust the amount of pressing with respect to the contact roller by the pressing bolt, and can cope with a change in the inclination angle of the inner surface of the lining pipe.
The auxiliary roller mechanism has a simple mechanism (structure), and therefore the manufacturing cost is low, and the cost of the pipe making apparatus can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows one Embodiment of the shaping | molding method of the lining pipe | tube by the spiral winding free cross-section pipe manufacturing apparatus provided with the auxiliary roller mechanism of this invention, and this pipe manufacturing apparatus. The rear view of this lining construction apparatus. FIG. 3 is a side sectional view of the lining construction apparatus (sectional view taken along line 3-3 in FIG. 1). The top view of this lining construction apparatus. The correspondence figure of the control frame and molding frame in this lining construction apparatus. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 9 is a detailed configuration diagram of the molding frame (viewed in the direction of arrow 7 in FIG. 8). FIG. 8 is a side view of the molding frame (viewed in the direction of arrow 8 in FIG. 7). The attachment figure of the shaping | molding frame of a joining mechanism part. The front view of a joining mechanism part. Sectional cross-section block diagram of a joining mechanism part (11-11 sectional view taken on the line of FIG. 10). The side view of this auxiliary roller mechanism (T) (12 direction arrow line view of FIG. 13). FIG. 13 is a front view of the auxiliary roller mechanism (viewed in the direction of arrow 13 in FIG. 12). The top view of this auxiliary roller mechanism (14 direction arrow view of FIG. 13). The side view of a forming frame and a control frame. Partial view of the guide. Action | operation explanatory drawing (1) of this auxiliary roller mechanism. Action | operation explanatory drawing (2) of this auxiliary roller mechanism. (a) A figure is a cross-sectional view of a lining pipe, (b) A figure is the longitudinal cross-sectional view of the AA line of the figure (a). The other mode figure of this auxiliary roller mechanism. (a) The figure is sectional drawing which shows the one aspect | mode of the strip | belt-shaped member used for this invention, (b) The figure is sectional drawing which shows the joining relationship of this strip | belt-shaped member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a spirally wound free cross-section pipe manufacturing apparatus provided with an auxiliary roller mechanism of the present invention and a lining pipe forming method using the pipe manufacturing apparatus will be described with reference to the drawings.
1 to 16 show a spirally wound pipe type lining construction apparatus provided with an auxiliary roller mechanism in a pipe rod according to an embodiment of the present invention.
That is, FIGS. 1 to 4 show an overall schematic configuration of the lining construction apparatus S, FIGS. 5 to 11, 15, and 16 show more detailed partial configurations of the construction apparatus S, and FIGS. Reference numeral 14 denotes an auxiliary roller mechanism which is a characteristic component of the present invention. 17 and 18 are explanatory views of the operation of the auxiliary roller mechanism. FIG. 20 shows an embodiment of a belt-like member used in the present invention.
In these figures, P is a pipe rod having a rectangular cross section, and R is a lining pipe produced by the lining construction apparatus S. In addition, let the advancing direction (arrow B) of the lining pipe R manufactured by this construction apparatus S be a front part and a rear part.

Strip member 100 (see FIG. 20)
Prior to the description of the configuration of the construction apparatus S, a belt-like member applied to the construction apparatus S will be described.
FIG. 20 shows an example of a belt-like member applied to the lining construction apparatus S of this embodiment.
The band-shaped member 100 has a flat plate shape with a constant thickness, and an appropriate number (5 in the illustrated example, usually 3) of protrusions 102 are continuously provided vertically in the longitudinal direction of the outer surface. A flange 102 a is formed at the tip of the protrusion 102. A groove 104 or a groove space is formed between the protrusions 102. The inner surface 106 is formed to be substantially smooth.
On both sides of the belt-like member 100, joint portions 100A and 100B are formed that are overlapped with each other inside and outside. That is, in the front edge side joint portion 100A, the base portion of the protrusion 102A at the front end is expanded, the concave groove 110 is provided vertically from the inner surface side, and the overhang portion 112 is further provided continuously from the protrusion 102A. The rear edge side joint portion 100B is provided with an overhang portion 114 extending from the protrusion 102B at the rear end portion, and a protrusion 116 that engages with the groove 110 of the front edge side joint portion 100A is vertically disposed near the end portion of the overhang portion 114. Established.
In the belt-like member 100, a plastic deformation material 120 as a plastic deformation functional material having a W-shaped cross section made of metal (usually steel) is mounted between intermediate protrusions 102. The plastic deformable material 120 is not limited to the position shown in the figure, and may be at other positions or at a plurality of locations, and a V shape, a U shape, or the like is adopted as the shape.
At the time of joining, the front edge portion and the rear edge portion of the adjacent belt-like members 100 overlap each other, and the outer surface roller and the inner surface roller of the joining roller portion described later by the rear edge side joint portion 100B overlap the front edge side joint portion 100A. In response, the ridge 116 is fitted into the groove 110, and the end of the protruding portion 112 is fitted into the flange 102a of the ridge 102B, and joined. In this case, the main engagement is made by the concave groove 110 and the convex stripe 116, and the overhanging portion 112 and the protrusion 102B make a secondary engagement. Therefore, in some cases, the secondary engagement can be omitted. .
Furthermore, in this embodiment, the sealing material 118 is interposed in the contact part of the overhang | projection parts 112 and 114, and bondability is improved. Note that the sealing material 118 can be omitted if the fitting engagement at the joints 100A and 100B is sufficient. The belt-shaped member is made of a synthetic resin material, and in particular, from the viewpoint of moldability, a vinyl chloride (PVC) resin that can be continuously formed by extrusion is suitable. However, it does not prevent metal molding.

Lining construction device S (See Figs. 1 to 11)
As shown in FIG. 1 to FIG. 4, the lining pipe making apparatus S includes a rectangular rigid regulation frame 10 and a guide roller 11 on the outer periphery. Mainly a flexible molding frame 13 that is movably arranged around the outer periphery. The flexure of the molding frame 13 is 180 ° and the outer folding is free, and the inner folding is limited by the middle folding preventing mechanism. The molding frame 13 is mainly composed of an inner surface roller 15 and an outer surface roller 16 that are attached at a predetermined interval, and a driving portion 17 that drives the rollers 15 and 16 and a feed roller mechanism portion that interlocks with the driving portion 17. A joining mechanism portion 19 including 18 is fixedly mounted, and the molding frame 13 receives a driving force from the driving portion 17 by the joining mechanism portion 19 and sandwiches the belt-like member 100 and propels it to rotate.

Hereinafter, the detailed configuration of the lining pipe making apparatus S will be described with reference to FIGS.
Molding frame 13 (see FIGS. 5 to 9)
The forming frame 13 is formed into an annular body with a required width, and the whole is flexible in the outer diameter direction with a link mechanism composed of a continuous link body 21 (frame portion 21a, shaft portion 21b), and laterally. It has rigidity.
The guide roller 11 is rotatably arranged on each shaft portion 21b of the link mechanism of the forming frame 13. The drive portion 17 of the joining mechanism portion 19 is attached to one attachment portion 21 </ b> A of the link body 21 of the molding frame 13.
(Anti-breaking mechanism)
The link bodies 21 can be folded outward with respect to each other at 180 °, but the middle break is prevented. For this reason, a middle break prevention mechanism is provided on the side surface of the frame portion 21 a of the link body 21. An example is shown in FIG. In the figure, 22 is a stopper.

Guide roller 11 (see FIGS. 5 to 9)
The guide roller 11 is rotatably mounted on each shaft portion 21 b of the link body 21 of the molding frame 13. The roller body is made of a hard synthetic resin body or metal body, and abuts against the inner surface of the belt-like member 100. The standard guide roller 11 (11a) has a length that is full of the inner width of the link body 21, but the required number (usually 1 to 2) of guide rollers 11 (11b) in the front portion of the joining mechanism portion 19 is usually normal. It is shifted backward by the width of the belt-like member 100 (see FIG. 13) or specially shortened (see FIG. 9).

Joining mechanism 19 (see FIGS. 10 to 11)
The joining mechanism part 19 includes a joining roller part, a drive part 17 and a feed roller mechanism part 18, and is attached to the attachment part 21 </ b> A of the molding frame 13. The joining mechanism portion 19 is mainly a joining roller portion in which an inner surface roller 15 and an outer surface roller 16 are combined, and a box body 25 that houses a gear mechanism 24 that rotates these rollers 15 and 16 synchronously. And a hydraulic motor 26 as a rotational drive source for the rollers 15 and 16 attached to the box body 25. The joining mechanism 19 is a joint of the belt-like member 100 wound spirally, that is, the belt-like member 100 is the first. It is arranged corresponding to the position that closes. The gear mechanism 24, the box body 25, and the hydraulic roller 26 constitute a drive unit 17, and the feed roller mechanism unit 18 is interlocked with the drive unit 17. The inner roller 15 is attached to the shaft portion 21 b of the link body 21 of the molding frame 13 in the same manner as the guide roller 11.

(Box 25)
As shown in FIG. 10, the box 25 is divided into an upper portion and a lower portion, the upper portion can be opened around the pin axis, and the upper portion is closed to the lower portion by the closing device 28. The box body 25 holds the shaft portion of the gear mechanism 24 by its front and rear surfaces over the upper and lower portions. Further, in the lower part of the box body 25, the front surface portion is an attachment portion of the hydraulic motor 26, and the rear surface portion is attached to the shaft portion 21 b of the link body 21 of the attachment portion 21 </ b> A of the molding frame 13.

(Gear mechanism 24)
As shown in FIG. 11, the gear mechanism 24 has three shaft portions 29, 30, 31 that are rotatably spanned sequentially from the lower side across the front and rear walls of the box body 25. , 31 are fixedly provided with gears 32, 33, 34. The inner shaft 15 of the joining roller portion is connected to the second shaft portion 30, and the outer roller 16 is connected to the third shaft portion 31. As shown in the figure, the second shaft portion 30 rotates in the opposite direction and the third shaft portion 31 rotates in the forward direction with respect to the rotation of the first shaft portion 29. As a result, the inner roller 15 and the outer roller 16 are mutually connected. Reverse rotation. Further, a spacer roller 35 for maintaining a space is rotatably attached to the third shaft portion 31.

(Feeding roller mechanism 18)
The feed roller mechanism 18 includes a drive sprocket 37 fixed to the second shaft portion 30 outside the box body 25, a sprocket-equipped feed roller 38 rotatably attached to the third shaft portion 31, and a chain 39. . The chain 39 is wound around the drive sprocket 37 and the sprocket portion of the feed roller with sprocket 38, and transmits the driving force of the drive sprocket 37 to the feed roller with sprocket 37. Thus, the rotation of the feed roller mechanism 18 comes into contact with the tube wall of the pipe rod P with the feed roller 38 with sprocket, and the rotation assists the movement of the apparatus S in the circumferential direction.

(Hydraulic motor 26)
The hydraulic motor 26 is attached to the front surface of the box 25 with its drive shaft connected to the first shaft portion 29. The hydraulic motor 26 is connected to an in-side pipe 41 a that sends oil to the hydraulic motor 26 and an out-side pipe 41 b that discharges oil from the hydraulic motor 26. Further, these pipes 41 are connected to a rotary joint 42 (see FIG. 3) attached to the box 25 or an appropriate position of the molding frame 13, and a pipe 43 connected to an external pressure source is connected to the rotary joint 42. The By passing through the rotary joint 42, the working fluid is exchanged between the piping 41 b on the hydraulic motor 26 side that rotates and the external piping 43 that does not rotate. By the gear mechanism 24 and the hydraulic motor 26, the driving force of the hydraulic motor 26 is transmitted to the first shaft portion 29 and also transmitted to the second and third shaft portions 30 and 31 via the gear mechanism 24. .

  The attachment mechanism 19 is attached to the lining pipe R by opening the upper portion of the box 25 at the front end of the already formed lining pipe R and setting the pitch of the ring-shaped flange portion of the outer surface roller 16 to the protrusion of the belt-like member 100. Match the pitch of the strip 102, then close the upper part to the lower part, close the closing device 28 and tighten the nut.

Restriction frame 10 and guide 12 (see FIGS. 5 and 6)
(Regulation frame 10)
The restriction frame 10 is made of steel, has a large rigidity, and has an overall shape of a rectangle. In the present embodiment, a steel mold having a hollow groove 45 is used, and the groove 45 opens outward. The restriction frame 10 is assembled with a divided body.
(Guide 12)
The guide 12 is interposed between the molding frame 13 and the regulation frame 10 and guides the movement of the molding frame 13 along the path of the regulation frame 10. More specifically, the guide 12 has a bearing body 46 pivotally attached to the shaft portion 21b of the molding frame 13 at both ends of the bifurcated main body, and the roller holding body 47 is inward from the central portion of the main body. The roller holding body 47 rotatably holds a rotating shaft 49 having rollers 48 attached to both sides thereof. The roller 48 is mounted in the groove 45 of the restriction frame 10 and moves along the inner wall.

  All the constructions of the construction apparatus S described above are known except for the positioning mechanism T (FIG. 2) (Japanese Patent Laid-Open Nos. 8-261363 and 2001-138398). Thus, the molding frame 13 assembled with the guide roller 11 and the joining mechanism portion 19 advances in the circumferential direction along the shape of the restriction frame 10 that maintains the same phase with respect to the cross section of the tube by driving the driving portion 17. At this time, the plastically deformable belt-like member 100 is spirally wound by the joining mechanism portion 19 to form a rectangular lining pipe R, and the feed roller mechanism portion 18 contacts the pipe wall of the pipe rod P. The construction apparatus S is smoothly promoted by contact and rotation. Further, as the molding frame 13 advances, the regulation frame 10 obtains an extrusion force from the molding frame 13 through the guide 12 and advances together with the molding frame 13.

  What should be noted here is the phase relationship between the restriction frame 10 and the molding frame 13. That is, since the forming frame 13 forms a tubular body by spiral winding of the belt-like member 100, the link bodies 21 are shifted from each other, and a spiral twist is given. On the other hand, the regulation frame 10 is a flat body made of a rigid body, and as a result, the regulation frame 10 and the molding frame 13 are out of phase. The play between the frames 10 and 13 and the intervening guide 12 absorbs a slight amount of the shift phase of the restriction frame 10, but the substantial phase shift between the restriction frame 10 and the molding frame 13 is eliminated. Therefore, the one-sided contact of the guide 12 with respect to the restriction frame 10 is not eliminated. A normal mode is adopted in which the link body 21 is shifted by one width of the belt-like member 100 before and after the joining mechanism portion 19 of the molding frame 13 composed of the link body 21 having the same width (as viewed in the circumferential traveling direction A). Sometimes this trend is significant. FIG. 4 shows this aspect. In the rear part of the joining mechanism part 19 of the molding frame 13, the regulation frame 10 comes closest to the molding frame 13 and in the front part of the joining mechanism part 19 of the molding frame 13. The frame 10 is farthest away from the molding frame 13. Therefore, in this aspect, the contact of the guide 12 is inevitable.

Auxiliary roller mechanism T (see FIGS. 12 to 14 and 17)
The present invention is characterized in that an auxiliary roller mechanism is added to the restriction frame 10 in the lining construction apparatus S having the above-described configuration.
The auxiliary roller mechanism T is fixed to the rear portion of the restriction frame 10 via the fixture 2 and extends to the rear portion along the tube axis direction. The auxiliary roller mechanism T is outside the fixed substrate 1 (that is, the lining pipe). A roller holding frame 3 that is rocked and held via a front pin shaft 3a (toward the inner surface of R), a push bolt 4 that is screwed into the fixed substrate 1 and presses the bottom of the roller holding frame 3 at the rear, The abutting roller 5 is rotatably held by the roller holding frame 3 and pressed against the inner surface of the lining pipe R.

Guide 12A (See FIGS. 12, 15, and 16)
First, in this embodiment, the guide 12A will be described with reference to the configuration and arrangement of the guide different from the previous example.
In the link body 21 of the molding frame 13, a bearing body 51 is fixed to a wall body of the link frame portion 21a facing each other with the link shaft portion 21b interposed therebetween via a rib 51a, and a shaft body 52 is attached to the bearing body 51. It is inserted and held. The shaft body 52 is relatively short, allows axial movement with respect to the bearing body 51, and is provided with stoppers 52a for preventing withdrawal at both ends thereof.
The guide body 54 has a hinge shape composed of two wing portions 54A and 54B, and each wing portion 54A and 54B has an end bearing portion 54a for receiving the shaft body 52 at the end.
Further, central bearing portions 54b and 54b 'which are fitted to each other are formed on the pivot portions of the wing portions 54A and 54B, and the roller shaft 55 is inserted and held.
The roller shaft 55 is sufficiently long, allows axial movement with respect to the central bearing portions 54b and 54b ′, and rollers 56 are rotatably mounted at both ends thereof.
The restriction frame 10 has a groove 45 for restraining and holding the roller 56, which is substantially the same as the previous example. However, the opening is wide, and the axial movement of the guide 12A is performed with a margin of the opening. Forgive. An anti-blur 58 in the axial direction of the roller 56 is attached in the groove 45. The anti-blur 58 can be omitted if the restriction frame 10 itself is narrow, and therefore the opening of the groove 45 is also narrow.
According to this guide element 12A, a triangular frame is formed, and a stable moving action can be obtained as compared with the guide element 12 (46, 47, 48, 49) of the previous example.
In the guide 12A of this example, the bearing body 51 and the guide body 54 are allowed to move in the axial direction, but this corresponds to a change in the size of the construction apparatus S and is not an essential matter. If the size of the construction apparatus S is uniquely determined, it is not necessary to move them.

Next, a detailed configuration of the auxiliary roller mechanism T will be described.
Fixed substrate 1
The fixed substrate 1 is fixed to the four corners of the restriction frame 10 and to the rear part of the restriction frame 10 with the fixing tool 2 and extends rearward in the tube axis direction.
More specifically, the fixed substrate 1 has a flat plate body 60 having a predetermined width, thickness and length and stiffened by a rib as a base, and is regulated by a fixture 2 made of bolts and nuts on its front wall portion 60a. Fixed to the rear surface of the frame 10. Two bolt insertion holes 61 are opened symmetrically at the rear portion of the flat plate body 60, and a nut 62 having a screw hole 62 a at the position corresponding to the bolt insertion hole 61 on the upper surface (outer surface) of the flat plate body 60. Is fixed. Further, two mounting ribs 63 are erected on the upper surface of the front portion of the flat plate body 60 while maintaining symmetry.

Roller holding frame 3
The roller holding frame 3 is rocked and held via a pin shaft 3 a held by a mounting rib 63 erected in front of the outside of the fixed substrate 1 (that is, toward the inner surface of the lining pipe R).
More specifically, the roller holding frame 3 is mainly composed of a base body 65 composed of a bottom plate portion 65a arranged in parallel with the flat plate body 60 and bracket portions 65b rising on both sides of the bottom plate portion 65a. A bearing portion 66 for holding the pin shaft 3a is provided on the front end of the bottom plate portion 65a so as to protrude from both sides.
(Pin shaft 3a)
In the present embodiment, the mounting rib 63, the pin shaft 3a, and the roller holding frame 3 are separate from each other for the pin shaft 3a. However, it is possible to adopt a mode in which the pin shaft 3a is fixed to the mounting rib 63. In this case, the bearing portion 66 of the roller holding frame 3 is hooked and held on the pin shaft 3a.

Push-in bolt 4
The pushing bolt 4 is screwed into the screw hole 62 a of the fixed substrate 1 and pushes the bottom surface of the roller holding frame 3 at the rear.

Contact roller 5
The contact roller 5 is made of hard rubber and has an expanded cylindrical shape having a predetermined width and thickness, and the shaft of the bracket portion 65b of the roller holding frame 3 via a shaft portion 69 disposed on the central axis. The hole 67 is held rotatably.

Action (see FIGS. 17 and 18)
The operation of the auxiliary roller mechanism T of this embodiment will be described with reference to FIGS.
In the auxiliary roller mechanism T, the contact roller 5 is pressed against the inner surface of the lining pipe R by tightening the pressing bolt 4 (see FIG. 17). The lining pipe R swells at a portion away from the forming frame 13 except for a corner portion (that is, a portion where the auxiliary roller mechanism T is disposed), and is reduced in diameter at the corner portion.

18A and 18B show the state of the lining pipe R (R0) at the position of the forming frame 13 and the state of the lining pipe R at a position away from the forming frame 13. FIG. That is, in the lining pipe R (initial lining pipe R0) at the position of the forming frame 13, the belt-like member 100 is bent with a strong force by the restriction action of the restriction frame 10, and the corners are bent sharply. And as this leaves | separates from the shaping | molding flame | frame 13, a corner | angular part becomes round by the elastic return force of the strip | belt-shaped member 100, and it becomes a steady state lining pipe | tube R (it is called a steady lining pipe | tube). In the steady lining pipe R, the passing dimension of the corner portion is reduced, and the diameter is expanded at the portion other than the corner portion.
As shown in FIG. 18B, the contact roller 5 of the auxiliary roller mechanism T of the present embodiment is disposed near the rear of the forming frame 13 so as to maintain the shape of the initial lining pipe R0. Strongly pushes up the inner surface against shrinkage deformation of R.

FIG. 17 explains this analytically.
That is, the contact roller 5 is in contact with the inner surface of the lining pipe R at the contact point (action point) p on the vertical line of the shaft portion 69, and maintains the shape of the initial lining pipe R0. As a result, the lining pipe R0 on the side of the pipe making apparatus S (front side) of the contact point p is parallel to the pipe axis, and the lining pipe R on the opposite side (rear side) of the contact point p is curved.
Accordingly, the pressing force f from one contact point (action point) p acts as a vertical component force in the vertical direction and is transmitted to the bracket portion 65b (main body) of the roller holding frame 3 via the shaft portion 69. Is transmitted to the fixed substrate 1 and the restriction frame 10. The vertical component forces are canceled out by the interaction of the contact rollers 5 arranged symmetrically, and the pressing force f is balanced and does not appear on the vertical axis of the tube axis.
Further, in the pipe circumferential direction, the contact roller 5 is installed corresponding to the corner of the initial lining pipe R0, and the corresponding contact roller 5 comes into contact with the inner surface of the lining pipe R0 with a large surface. There is no slip of the pipe R (R0) in the pipe circumferential direction.
Thereby, the restriction frame 10 is held by itself, and no harmful interference operation with the molding frame 13 is caused.
The advancing force of the pipe manufacturing apparatus S for lining is obtained by spiral winding of the belt-like member 100 at the joining roller portion 19 (inner surface roller 15 and outer surface roller 16) of the joining mechanism portion 19, and the molding frame 13 is The control frame 10 advances with the spiral winding, and the regulation frame 10 advances following the advance of the molding frame 13 via the guide 12 (12A) while regulating the circumferential movement of the molding frame 13.
At this time, the pressing force f acting on the restricting frame 10 is balanced, and the restricting frame 10 does not move in the pipe circumferential direction, and the restricting frame 10 is held independently. Move forward smoothly without causing it.

The lining construction of the pipe making type in the pipe tub performed using the lining construction apparatus S provided with the auxiliary roller mechanism T with respect to this regulation frame is demonstrated.
The outline of the construction work in the sewer pipe is shown based on FIGS. In this construction work, an example of application to a sewer pipe P having a rectangular cross section is shown. In this construction, construction is performed from the upstream manhole side toward the downstream manhole side.
In the ground part, a feeding device (not shown) for the belt-like member 100 is installed on the upstream side, and the belt-like member 100 is continuously connected to the lining construction device S installed in the human hole from the opening of the human hole by this feeding device. Supplied. A hydraulic pressure source (not shown) is disposed on the downstream side.

The lining construction is done based on the following procedure.
(1) Preparation and initial action process
(1a) Preparatory process This lining construction device S is brought into the human hole through the opening of the upstream human hole of the rectangular cross section pipe P to be rehabilitated in the disassembled state, and the main lining work is performed in the human hole. Assemble device S. The forming frame 13 of the construction apparatus S can be disassembled and assembled, and the regulation frame 10 is also a divided body, so that it can be easily carried into the human hole. Furthermore, the joining mechanism part 19 can be attached to the molding frame 13 and can be easily attached on site. The molding frame 13 is restrained by the restriction frame 10 via the guides 12 and 12A, and is disposed in a rectangular shape around the restriction frame 10. A hydraulic piping system arranged from the downstream side is connected to the joining mechanism portion 19.
(1b) Attachment of the auxiliary roller mechanism T Furthermore, the auxiliary roller mechanism T is attached to the restriction frame 10 of the lining construction apparatus S. That is, at each corner of the restriction frame 10, the fixed substrate 1 of the auxiliary roller mechanism T is fixed to the side surface of the restriction frame 10 with the fixture 2, and the pushing bolt 4 is moved backward to retract the contact roller 5. .
(1c) Initial movement process The belt-like member 100 is drawn into the human hole, introduced into the joining mechanism portion 19 of the lining construction apparatus S, and the belt-like member 100 is wound around the rectangular forming frame 13 by driving the joining mechanism portion 19. Go. The strip member 100 is bent at a right angle at each corner of the restricting frame 10 and thus at each corner of the molding frame 13. The band-shaped member 100 that contacts the band-shaped member 100 in the second winding is joined by the joint. The belt-like member 100 is wound around the forming frame 13 several times to produce a lining pipe (initial lining pipe) Ro.
(1d) After the rear end of the initial lining tube Ro of the auxiliary roller mechanism T passes through the contact roller 5 of the auxiliary roller mechanism T, the pressing bolt 4 of the auxiliary roller mechanism T is rotated to rotate the contact roller 5. Is pressed firmly against the inner surface of the initial lining pipe Ro, and the cross-sectional shape of the initial lining pipe Ro is maintained in the initial state in the molding frame 13.

(2) Steady process By the rotational drive of the inner and outer rollers 15 and 16 of the joining mechanism 19, the inner lining 15 and the outer roller 16 are clamped, and the joint lining of the belt-like member 100 is used for the starting lining. The belt-like member 100 newly supplied continuously with the tube Ro is joined.
Furthermore, the molding frame 13 assembled with the guide roller 11 and the joining mechanism 19 by the driving of the joining mechanism 19 of the lining construction apparatus S proceeds along the shape of the regulation frame 10 via the guides 12 and 12A. To do. At the corners of the regulation frame 10, the joining roller parts 15 and 16 of the joining mechanism part 19 fold the belt-like member 100 inward. The band-shaped member 100 has plastic deformability and maintains the bent state as it is. Further, the feed roller 38 of the feed roller mechanism 18 abuts against the tube wall of the tube rod P, and the rotation of the feed roller 38 receives a reaction from the tube wall to rotate the apparatus S.
The entire construction apparatus S rotates in the pipe circumferential direction (b direction) and advances in the pipe axis direction (b direction). As a result, the belt-like member 100 is spirally wound, and a rectangular lining pipe R is produced.

(3) In the step (2), the restricting frame 10 and the forming frame 13 maintain the positional relationship (phase) independently of each other by the auxiliary roller mechanism T attached to the restricting frame 10. The guides 12 and 12A interlocked with the molding frame 13 can be smoothly moved without mutual interference. In other words, the circumferential movement of the main body of the guide elements 12 and 12A and the roller 56 in the groove 45 of the restriction frame 10 is rubbed, there is no contact, and the circumferential movement is made smoothly.

(4) When the lining pipe R reaches the downstream manhole, the driving of the lining construction device S is stopped, the lining construction device S is dismantled and removed, and the upstream and downstream manholes are disposed. The protruding lining pipe R is excised.

(5) In each human hole, the space between the tube rod P and the lining tube R is sealed, and a caulking backfill material is injected into the gap between the tube rod P and the lining tube R over the entire length of the tube rod P. The lining work is completed after the consolidation.

(Effect of embodiment)
According to the lining construction apparatus S provided with the auxiliary roller mechanism T for the restriction frame 10 of this embodiment, the restriction frame 10 is not moved in the pipe circumferential direction by the auxiliary roller mechanism T, and is held independently. The positional relationship (phase) between 10 and the molding frame 13 is always kept constant. Thereby, there is no rotation of both the frames 10 and 13, and furthermore, there is no friction with the guides 12 and 12A in the groove 45 of the regulation frame 10 and no contact with each other, so that the lining construction operation is performed smoothly.
Further, since the molding frame 13 is supported by the regulation frame 10 that is held by itself, the molding frame 13 is prevented from wobbling due to the winding of the belt-like member 100, and the forward movement of the lining construction apparatus S is prevented. Is done smoothly.

(Other aspects)
In the above embodiment, the construction mode with the pipe rod P having a quadrangular cross section is shown, but FIG. 19 shows an application example in a pipe rod with a horseshoe-shaped cross section.
In the lining construction apparatus of this aspect (the configuration of the entire apparatus is omitted in accordance with the previous embodiment), the restriction frame 10 has a horseshoe shape, and both corners of the apex portion and the lower base of the horseshoe shape restriction frame 10 are provided. The auxiliary roller mechanism T having the same configuration as that of the previous embodiment is arranged at three positions of the section. R is a lining pipe made by the lining construction apparatus.

The present invention is not limited to the above-described embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.
1) In the present embodiment, the lining construction apparatus and the lining method applied to the pipe rod are shown. However, the present invention is not limited to the pipe rod, and the lining pipe pipe manufacturing apparatus and the manufacturing method thereof are not limited to the pipe rod. Tube methods are also included.
2) The restriction frame is not limited to the rectangle (square) in the present embodiment, and includes a shape having at least one other corner, that is, a triangle, a polygon, and a horseshoe shape.
3) The drive source is a hydraulic type in the present embodiment, but may be driven with air pressure or electric power.

S ... Lining equipment, T ... Auxiliary roller mechanism, P ... Pipe rod, R ... Tubular body (lining pipe)
DESCRIPTION OF SYMBOLS 1 ... Fixed board | substrate, 2 ... Fixing tool, 3 ... Roller holding frame, 3a ... Pin shaft, 4 ... Push-in bolt, 5 ... Contact roller, 10 ... Restriction frame, 11 ... Guide roller, 12, 12A ... Guide element, 13 DESCRIPTION OF SYMBOLS ... Molding frame, 15 ... Inner surface roller, 16 ... Outer surface roller, 19 ... Joining mechanism part, 100 ... Band-shaped member, 100A, 100B ... Joining part (joint)

Claims (6)

A tubular lining pipe formed by spirally winding a long belt-like member with plastic deformation that is continuously supplied and formed with joints on both side edges, and joining the joints that are in contact with each other. The additional lining pipe is additionally formed with a band-shaped member newly supplied to the front of the already formed lining pipe.
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that contacts the inner surface of the additional lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to be freely rotatable.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
Comprising an auxiliary roller mechanism,
A lining pipe making apparatus.   The pipe manufacturing apparatus for lining according to claim 1, wherein the shape of the restriction frame is a quadrangle.   The pipe manufacturing apparatus for a lining according to claim 1, wherein the shape of the restriction frame is a horseshoe shape. A tubular lining pipe formed by spirally winding a long belt-like member with plastic deformation that is continuously supplied and formed with joints on both side edges, and joining the joints that are in contact with each other. The additional lining pipe is additionally formed with a band-shaped member newly supplied to the front of the already formed lining pipe.
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that is in contact with the inner surface of the lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to freely rotate.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
It is carried out using a pipe making apparatus provided with an auxiliary roller mechanism,
Along with the molding of the additional lining pipe, the contact roller is pressed against the inner surface of the additional lining pipe that is separated from the molding frame, and the initial cross section of the additional lining pipe by the molding frame is maintained.
A method for producing a lining pipe, characterized by: In a pipe rod, a long strip-shaped member provided with plastic deformability that is continuously supplied and formed on both side edges is spirally wound, and the adjacent joints are joined together. The tubular lining pipe is left, and an additional lining pipe is additionally formed with a belt-like member newly supplied in front of the already formed lining pipe,
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In the construction apparatus which arranges a flexible forming frame and forms the additional lining pipe by the sandwiching and joining function between the inner roller and the outer roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that contacts the inner surface of the additional lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to be freely rotatable.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
Comprising an auxiliary roller mechanism,
A lining construction device for pipe rods characterized by that. In a pipe rod, a long strip-shaped member provided with plastic deformability that is continuously supplied and formed on both side edges is spirally wound, and the adjacent joints are joined together. The tubular lining pipe is left, and an additional lining pipe is additionally formed with a belt-like member newly supplied in front of the already formed lining pipe,
At the front end portion of the already formed lining pipe, there is a joining mechanism portion made up of an inner surface roller and an outer surface roller, which moves while being restricted by a guide along a restricting frame having rigidity and a predetermined shape. In a pipe making apparatus for arranging a flexible forming frame and forming the additional lining pipe by a sandwiching and joining function between the inner surface roller and the outer surface roller,
At each corner of the restriction frame, a fixed substrate is rigidly connected to the rear end of the restriction frame and extends rearward in the tube axis direction.
A roller holding frame is swingably attached via a pin shaft that is fixed and held only on the outside and front part of the fixed substrate.
A contact roller that is in contact with the inner surface of the lining pipe with a wide surface is attached to the rear portion of the roller holding frame so as to freely rotate.
The roller holding frame is point-supported by a pushing bolt that is screwed forward and backward to the rear portion of the fixed substrate.
It is carried out using a pipe making apparatus provided with an auxiliary roller mechanism,
Along with the molding of the additional lining pipe, the contact roller is pressed against the inner surface of the additional lining pipe that is separated from the molding frame, and the initial cross section of the additional lining pipe by the molding frame is maintained.
The lining construction method in a pipe tub characterized by this.

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