JP5770535B2 - Method for manufacturing pipe-making member - Google Patents

Description

  The present invention relates to a method for manufacturing a tube-forming member that is formed into a tubular shape by being spirally wound.

  Conventionally, as a method of rehabilitating existing pipes such as aging sewer pipes, water pipes, agricultural water pipes, gas pipes, etc., a long strip-shaped pipe-forming member is spirally wound in the existing pipe, and the preceding belt-like member A method has been proposed in which a rehabilitated pipe is formed in a pipe line of an existing pipe by sequentially joining one side edge part and the other side edge part of a pipe-forming member that follows with a delay in circulation.

  As shown in FIG. 11, when forming the rehabilitation pipe 130 in the existing pipe 500, the winding drum 91 around which the pipe making member 1 is wound is arranged on the ground and the pipe making apparatus 110 is arranged in the existing pipe 500. To do. The pipe making member 1 fed out from the winding drum 91 is supplied to the pipe making apparatus 110 through the start side shaft 510. The pipe making apparatus 110 spirally winds the continuously supplied pipe making member 1, and the one side edge of the preceding pipe making member 1 and the other side edge of the pipe making member 1 that follows with a delay in circulation. The one side edge and the other side edge are sequentially joined while adjoining each other, so that the pipe-making member 1 moves toward the arrival side shaft 520 while sequentially leaving the rehabilitated pipe 130 additionally formed in a spiral shape. To do. The pipe making apparatus 110 is driven by pressure oil supplied from a hydraulic unit 93 disposed in front of the pipe making apparatus 110 in the moving direction. The hydraulic unit 93 is driven by electric power supplied from a generator 92 arranged on the ground.

  As the pipe-making member 1 used in this method, as shown in FIG. 12A, a long strip-shaped substrate 21 and a plurality of ribs 23 provided along the length direction of the surface 211 of the substrate 21. And a reinforcing metal fitting 3 fitted and fixed between the inner side walls 233 of the two ribs to be reinforced 230 selected from the plurality of ribs 23 have been developed (see, for example, Patent Document 1 below). ).

  The rib 23 increases the strength of the rehabilitating tube 130 when the tube-making member 1 is formed on the rehabilitating tube 130. The reinforcing metal fitting 3 serves to reinforce the ribs 23 (particularly the ribs 230 to be reinforced) and further improve the strength of the rehabilitated pipe 130. The reinforced rib 230 is provided with eaves 231 projecting toward both sides at the free end thereof, and the reinforcing metal fitting 3 has the free ends of the pair of side plate portions 31 facing each other on the lower surface of the eaves 231. In the hooked state, the two reinforcing ribs 230 are fitted and fixed.

  By the way, when the rehabilitated pipe 130 is manufactured, a torsional stress is always applied to the pipe-forming member 1 that is supplied while being spirally wound in the existing pipe 500. In some cases, the two ribs 230 to be reinforced are inclined in a direction to open each other, and the reinforcing metal fitting 3 is detached (see FIG. 12B).

  In order to prevent the reinforcing metal fitting 3 from coming off due to a torsional stress generated during pipe making, a return portion 232 protruding toward the surface 211 of the substrate 21 is provided at one end of each eave portion 231, and the return portion. A means for preventing the reinforcing metal fitting 3 from coming off by inserting the free ends of the pair of side plate portions 31 of the reinforcing metal fitting 3 between the H.232 and the inner wall 233 of the reinforcing rib 230 can be considered (see FIG. 13). .

JP 11-235757 A

  Here, as the protruding distance of the return portion 232 provided on the eave portion 231 increases, the reinforcing metal fitting 3 is more reliably prevented from coming off. However, if the protruding distance of the return portion 232 provided on the eave portion 231 is increased, the reinforcing metal fitting 3 is interposed between the return portion 232 and the inner side wall 233 of the reinforcing rib 230 at the time of manufacturing the pipe-making member 1. It becomes difficult to insert the free ends of the pair of side plate portions 31.

  The present invention was developed to solve the technical problem, and an object of the present invention is to provide a method for manufacturing a pipe-making member in which a reinforcing metal fitting is difficult to come off even when a torsional stress is applied during pipe-making. To do.

The method for producing a pipe-making member according to the present invention includes a long strip-shaped substrate, a plurality of ribs provided along the length direction of the surface of the substrate, and two strips selected from the plurality of ribs. A pair of eaves portions protruding in opposite directions provided on the inner walls or vertices of the reinforcing ribs facing each other, and a barb protruding toward the surface of the substrate respectively provided at one end of each eave portion A reinforcing metal fitting comprising: a pair of side plate portions facing each other along between the two ribs to be reinforced in the belt-shaped member having a portion; and a bridging portion that bridges one ends of the pair of side plate portions. It is a manufacturing method of a pipe-making member that manufactures a pipe-making member by fitting and fixing, and when the reinforcing metal fitting is fitted and fixed between the two reinforcing ribs, between the two reinforcing ribs in the belt-like member In addition, By pushing the serial reinforcing bracket from one end of the pair of side plate portions, on each side of the pair of side plate portions of the reinforcing brackets, said being in contact with the return portion, said reinforcing bracket of the Nijo Temporarily fixing between the ribs to be reinforced, and then supporting two positions on the substrate facing each other across the two ribs to be reinforced from the back side of the substrate, and the reinforcing metal fittings on the surface of the substrate By pressing from the side, the substrate is curved, and an urging force toward each side plate portion with which the return portion abuts is applied to each of the eave portions, and by the urging force, the other of the pair of side plate portions is provided. wherein each free end which is the end side respectively pledged between said return part and the inner wall of the reinforcing ribs, has, along between the reinforcing ribs of the two articles in the belt-shaped member is fixed fitted to the reinforcing bracket And wherein the door.

  In the method for producing a pipe-making member of the present invention, the first pressing member including a convex roller having a taper process that increases the outer diameter from the both ends of the outer peripheral surface toward the center, and from the both ends of the outer peripheral surface to the center. And a second pressing member provided with a concave roller that is tapered to reduce the outer diameter toward the outer surface, and by bringing the outer peripheral surface of the concave roller into contact with the back surface side of the substrate, By pressing the reinforcing metal fitting from the front surface side of the substrate on the outer peripheral surface of the convex roller while supporting the two locations facing each other across the two reinforcing ribs, from the back surface side of the substrate, It is preferable that the substrate is curved.

  ADVANTAGE OF THE INVENTION According to this invention, even if twisting stress is loaded at the time of pipe manufacture, the member for pipe manufacture which a reinforcement metal fitting cannot remove easily can be manufactured.

Drawing 1 is an explanatory view explaining the manufacturing method of the member for pipe manufacture of the present invention concerning an embodiment. FIG. 2 is a cross-sectional view showing a belt-like member. FIG. 3 is a cross-sectional view showing the reinforcing metal fitting. FIG. 4A is an explanatory view for explaining a state in which the reinforcing metal fitting is temporarily fixed to the belt-like member, and FIG. 4B is a cross-sectional view showing the belt-like member to which the reinforcing metal fitting is temporarily fixed. is there. FIG. 5A is an explanatory diagram for explaining a state in which the reinforcing metal fitting is fitted and fixed to the belt-like member, and FIG. 5B is a diagram illustrating a pipe-making member in which the reinforcing metal fitting is fitted and fixed to the belt-like member. It is sectional drawing shown. FIG. 6 is an explanatory view illustrating a state in which the reinforcing metal fitting is fitted and fixed to the belt-like member using the first pressing member and the second pressing member. Fig.7 (a) is sectional drawing which shows another strip | belt-shaped member, FIG.7 (b) is sectional drawing which shows the member for pipe manufacture by which the reinforcement metal fitting was engage | inserted and fixed to this strip | belt-shaped member. FIG. 8A is a cross-sectional view showing another reinforcing metal fitting, and FIG. 8B is a cross-sectional view showing a pipe-making member in which the reinforcing metal fitting is fitted and fixed to a belt-like member. FIG. 9A is a cross-sectional view showing still another reinforcing metal fitting, and FIG. 9B is a cross-sectional view showing a pipe-making member in which the reinforcing metal fitting is fitted and fixed to a belt-like member. FIG. 10A is a cross-sectional view showing a pipe-making member joined by fitting a separate connector, and FIG. 10B is a perspective view showing a state in which the pipe-making member is joined. FIG. 11 is an explanatory diagram for explaining a state where an existing pipe is being rehabilitated. 12A is a cross-sectional view showing a conventional pipe-making member, and FIG. 12B is a cross-sectional view showing a state in which a twisting stress is applied to the pipe-making member. FIG. 13 is a cross-sectional view showing a pipe-making member developed in order to prevent the reinforcing metal fitting from being detached due to a torsional stress generated during pipe-making.

  The manufacturing method of the member 1 for pipe manufacture of this invention which concerns on FIG. 1 at embodiment is shown. In the manufacturing method of the member 1 for pipe making concerning this embodiment, the process (henceforth a band-shaped member formation process) which forms the strip | belt-shaped member 2, and the process (henceforth a reinforcement metal-fitting formation process) which forms the reinforcement metal fitting 3. And a step of fitting and fixing the reinforcing metal fitting 3 to the belt-like member 2 (hereinafter referred to as a fitting step).

In the band-shaped member forming step, for example, as shown in FIG. 2, a long band-shaped substrate 21, a plurality of ribs 23 provided along the length direction of the surface 211 of the substrate 21, and the plurality of lines A pair of eaves 231 provided at the vertices of the two reinforced ribs 230 selected from the ribs 23 and protruding in opposite directions, and the substrate 21 provided at one end of each eave 231. The belt-like member 2 having the return portion 232 protruding toward the front surface 211 is formed. Note that a male fitting portion 24 and a female fitting portion 25 are provided on one side edge and the other side edge of the substrate 21, and the pipe-making member 1 is spirally wound so that the preceding pipe-making use is made. If the male fitting portion 24 is sequentially fitted in the female fitting portion 25 in a state where the member 1 and the pipe producing member 1 that follows the lap are adjacent to each other, the pipe making member 1 is spirally added. A tubular body (rehabilitation pipe) is manufactured.

  In the present embodiment, a thermoplastic resin (polyvinyl chloride, polyethylene, polycarbonate, polyester, etc.) is first charged from the raw material equipment 10 toward the hopper of the extruder 11, and is heated and kneaded in the extruder 11 to be plasticized. The strip-shaped member 2 was formed by continuously extruding the raw material toward the mold 12 and cooling it with the cooling device 13. The formed belt-like member 2 is pulled out by the drawer 14 and sent to the fitting process described later.

  In the reinforcing bracket forming step, for example, as shown in FIG. 3, the reinforcing bracket 3 including a pair of side plate portions 31 facing each other and a bridging portion 32 that bridges one ends of the pair of side plate portions 31. Form. In the present embodiment, the long strip-shaped metal plate 30 wound around the drum 300 is supplied to the roll forming machine 15, and the metal plate 30 is subjected to bending processing (roll forming processing) so as to have a W-shaped cross-sectional view. The reinforcing metal fitting 3 was formed. That is, the bridging portion 32 in the reinforcing metal fitting 3 is bent. The formed reinforcing metal fitting 3 is sent to the fitting process described later.

  In the fitting step, the reinforcing metal fitting 3 is fitted and fixed along the space between the two reinforcing ribs 230 in the belt-like member 2. In the present embodiment, first, a step of temporarily fixing the reinforcing metal fitting 3 between the two ribs to be reinforced 230 in the belt-like member 2 (hereinafter referred to as a temporary fixing step) is performed, and then a pair of reinforcing metal fittings 3 are paired. Each free end of the side plate portion 31 is inserted between the inner wall 233 and the return portion 232 of the rib to be reinforced 230, and the reinforcing metal fitting 3 is fitted along the two ribs to be reinforced 230 of the belt-like member 2. The fitting step was performed by executing a fixing step (hereinafter referred to as a main fixing step).

In the temporary fixing step, the reinforcing metal fitting 3 is pushed between the two reinforcing ribs 230 in the belt-like member 2 by pushing the reinforcing metal fitting 3 from one end side of the pair of side plate portions 31. Fix it.

In this embodiment, as shown in FIG. 4A, the reinforcing member 3 is placed between the two ribs 230 to be reinforced in the strip member 2, and then the strip member 2 and the reinforcing member 3 are connected to the upper roller. The temporary fixing step was carried out by passing through a temporarily fixing pinch roller 4 composed of 41 and a lower roller 42. Through this temporary fixing step, the reinforcing metal fitting 3 is pushed between the two ribs to be reinforced 230 in the band-like member 2, and the respective return portions 232 are brought into contact with the respective side surfaces of the pair of side plate portions 31 in the reinforcing metal fitting 3. Temporarily fixed (see FIG. 4B).

In the main fixing step, two positions of the substrate 21 facing each other across the two reinforcing ribs 230 are supported from the back surface 212 side of the substrate 21, and the reinforcing metal fitting 3 is supported on the surface 211 side of the substrate 21. By pressing from the side, the substrate 21 is bent, and each of the eaves 231 is applied with a biasing force toward each side plate 31 where the return portion 232 contacts, and the pair of side plates is caused by the biasing force. Each free end of the portion 31 is inserted between the inner wall 233 of the rib to be reinforced 230 and the return portion 232, so that the reinforcing bracket 3 extends between the two ribs to be reinforced 230 in the strip member 2. Insert and fix.

  In the present embodiment, as shown in FIG. 5A, a pair of back surface support rollers 51 that rotate in contact with the back surface 212 of the substrate 21, and a reinforcing bracket support roller that rotates in contact with the reinforcing bracket 3. The fixing step was performed by passing the band-shaped member 2 in which the reinforcing metal fitting 3 is temporarily fixed between 52 and 52.

When the belt-like member 2 in which the reinforcing metal fitting 3 is temporarily fixed is passed between the pair of back surface supporting rollers 51 and the reinforcing metal metal support roller 52, the pair of back surface supporting rollers 51 are respectively connected to the back surface 212 of the substrate 21. From the side, the substrate 21 rotates in contact with two positions facing each other across the two ribs 230 to be reinforced. On the other hand, the reinforcing metal support roller 52 rotates in contact with the reinforcing metal fitting 3 temporarily fixed between the two reinforcing ribs 230, and the substrate 21 sandwiching the reinforcing metal fitting 3 between the two reinforcing ribs 230. pressed against the surface 211 of the. As a result, the substrate 21 is curved while passing between the pair of back surface support rollers 51 and the reinforcing bracket support roller 52.

  In the present embodiment, the back support roller 51 is disposed in a state where the rotation axis is inclined so that the back support roller 51 contacts the back surface 212 of the curved substrate 21 from the vertical direction and rotates smoothly.

  Further, when supporting two positions on the substrate 21 opposite to each other with the two ribs to be reinforced 230 sandwiched between the pair of back surface support rollers 51 arranged at intervals, two positions are supported. As the distance between the supporting positions increases, the substrate 21 can be bent with a smaller force. Therefore, it is preferable that the distance between the pair of back surface support rollers 51 be as wide as possible. More specifically, it is preferable that the contact positions of the back surface support rollers 51 with respect to the substrate 21 are positions close to the one side edge portion and the other side edge portion of the substrate 21, respectively.

  Furthermore, it is preferable to use the reinforcing metal support roller 52 that rotates only in contact with the reinforcing metal 3 during the main fixing step. Accordingly, as the reinforcing metal support roller 52, a roller whose outer peripheral surface is narrower than the width between the two ribs to be reinforced 30 or a taper process that increases the outer diameter from both ends of the outer peripheral surface toward the center. It is preferable to use one (convex roller) that has been subjected to.

When the substrate 21 is curved, the two ribs 230 to be reinforced are inclined toward each other, and the biasing force toward each side plate portion 31 with which the return portion 232 abuts against each eave portion 231 existing at the free end thereof. Is granted.

  Due to the urging force, the return portions 232 provided in each eave portion 231 get over the free ends of the side plate portions 31 in the reinforcing metal fittings 3, respectively, and the free ends of the side plate portions 31 are the inner walls 233 of the ribs 230 to be reinforced. And the return portion 232 (see FIG. 5B).

  Thereby, the reinforcing metal fitting 3 is fitted and fixed along the space between the two ribs 230 to be reinforced in the band-shaped member 2, and the pipe-making member 1 is manufactured.

  The pipe-making member 1 manufactured by the method for manufacturing the pipe-making member 1 of the present invention is wound around the winding drum 91. In the pipe-making member 1, the reinforcing metal fitting 3 is fitted and fixed in a state in which the free end of the side plate portion 31 in the reinforcing metal fitting 3 is inserted between the return portion 232 and the inner wall 233 of the rib 30 to be reinforced. Therefore, even when a twisting stress is applied to the pipe-forming member 1 during pipe making and the two ribs 230 to be reinforced are inclined in the direction of opening each other, the reinforcing metal fitting 3 is difficult to come off.

  By the way, in the present embodiment, as means for bending the substrate 21, a pair of back surface support rollers 51 rotating in contact with the back surface 212 of the substrate 21, and a reinforcing bracket support roller 52 rotating in contact with the reinforcing bracket 3. In the present invention, the means for bending the substrate 21 is not limited to such means.

  For example, as shown in FIG. 6, the first pressing member 6 including a convex roller 61 having a taper process that increases the outer diameter from both ends of the outer peripheral surface toward the center, and from both ends of the outer peripheral surface toward the center. A second pressing member 7 having a concave roller 71 that is tapered to reduce the outer diameter, and by bringing the outer peripheral surface of the concave roller 71 into contact with the back surface 212 side of the substrate 21, The reinforcing metal fitting 3 is attached to the substrate on the outer peripheral surface of the convex roller 61 while supporting two portions of the substrate 21 facing each other across the two reinforcing ribs 230 from the back surface 212 side of the substrate 21. The substrate 21 may be curved by pressing from the surface 211 side of the substrate 21.

  Thus, by passing the belt-shaped member 2 in which the reinforcing metal fitting 3 is temporarily fixed between the first pressing member 6 having the convex roller 61 and the second pressing member 7 having the concave roller 71, the substrate If the substrate 21 is curved, the substrate 21 is curved while being in surface contact with the outer peripheral surface of the concave roller 71 of the second pressing member 7, so that the substrate 21 is made more stable with the first pressing member 6 and the second pressing member 6. It passes between the pressing members 7. Thereby, the feeding speed of the substrate 21 can be increased, and the manufacturing speed can be improved. In addition, since the entire back surface 212 of the substrate 21 is supported by the outer peripheral surface of the concave roller 71, the pressing force of the first pressing member 6 can be efficiently transmitted to the reinforcing metal fitting 3. Furthermore, it becomes easy to increase the pressing force of the first pressing member 6, and the reinforcing metal fitting 3 can be fitted into the band-shaped member 2 more reliably.

  Moreover, in this embodiment, although the strip | belt-shaped member 2 of the shape shown in FIG. 2 was formed in the strip | belt-shaped member formation process, the strip | belt-shaped member 2 is not restricted to this shape.

  For example, as shown in FIG. 7A, as the band-shaped member 2, a long band-shaped substrate 21, a plurality of ribs 23 provided along the length direction of the surface 211 of the substrate 21, and the plurality A pair of eaves 231 provided in the inner wall 233 of each of the two reinforced ribs 230 selected from the ribs 23, respectively, projecting in opposite directions, and provided at one end of each eave 231. You may form what comprises the return part 232 which protrudes toward the surface 211 of the said board | substrate 21. As shown in FIG.

  In other words, the belt-like member 2 has the eaves 231 provided on the inner wall 233 of the ribs 230 to be reinforced. In the reinforcing metal fitting 3 in the pipe-making member 1 manufactured using the belt-like member 2, the free end of the side plate portion 31 is provided at the inner wall 233 of the rib to be reinforced 230 and one end of the eave portion 231. It is fitted and fixed in a state of being inserted between the return portions 232 (see FIG. 7B).

  The pipe-making member 1 is configured so that the free end of the side plate portion 31 in the reinforcing metal fitting 3 has the return portion in the eave portion 231 provided at a position lower than the inner wall 233 of the rib to be reinforced 230 and the apex of the rib to be reinforced 230. Since the torsional stress is applied to the pipe-forming member 1 during pipe making and the two ribs 230 to be reinforced are inclined in the direction of opening each other, the reinforcing metal fitting 3 is more difficult to come off. It has become.

  Here, the free end of the side plate portion 31 in the reinforcing metal fitting 3 is moved into the inner side of the reinforcing rib 230 by simply pushing the reinforcing metal fitting 3 from the bridge portion 32 side between the two reinforcing ribs 230 in the belt-like member 2. Although it is very difficult to manufacture the pipe-forming member 1 by inserting it between the wall 233 and the return portion 232 of the eave portion 231 provided at a position lower than the apex of the rib 230 to be reinforced, According to the manufacturing method of the pipe manufacturing member 1, even the pipe manufacturing member 1 having such a configuration can be easily manufactured.

  In the present embodiment, the reinforcing metal fitting 3 having the shape shown in FIG. 3 is formed in the reinforcing metal fitting forming step. However, the reinforcing metal fitting 3 is not limited to those having these shapes.

  For example, as shown in FIG. 8A, as the reinforcing metal fitting 3, a pair of side plate portions 31 that face each other, a bridging portion 32 that bridges one ends of the pair of side plate portions 31, and the pair of side plate portions 31. A tongue piece 33 provided in each free end and protruding in a direction opposite to each other may be formed.

  That is, the reinforcing metal fitting 3 is provided with tongue pieces 33 that protrude in directions facing each other by bending each free end of the pair of side plate portions 31. In the pipe-making member 1 manufactured using the reinforcing metal fitting 3, the tongue piece 33 provided at each free end of the pair of side plate portions 31 in the reinforcing metal fitting 3 includes the inner wall 233 of the rib to be reinforced 230, The reinforcing metal fitting 3 is fitted and fixed in a state of being inserted between the return portion 232 provided at one end of the eaves portion 231 (see FIG. 8B).

  In this pipe-making member 1, tongue pieces 33 that increase the bulk of each free end of the side plate portion 31 in the reinforcing metal fitting 3 are formed on the inner wall 233 of the rib to be reinforced 230 and the eaves 231 provided on the rib to be reinforced 230. Since it is inserted between the return portions 232, the torsional stress is applied to the tube-forming member 1 during pipe-making, and the reinforcing metal fitting 3 is more capable of being tilted in the direction in which the two reinforcing ribs 230 are opened to each other. It is harder to come off.

  Here, a bulky tongue piece provided at each free end of the side plate portion 31 of the reinforcing bracket 3 by simply pushing the reinforcing bracket 3 from the bridge portion 32 side between the two reinforced ribs 230 of the belt-shaped member 2. It is very difficult to manufacture the pipe-forming member 1 by inserting 33 between the inner wall 233 of the reinforced rib 230 and the return portion 232 of the eaves 231 provided on the reinforced rib 230. However, according to the manufacturing method of the pipe manufacturing member 1 of the present invention, even the pipe manufacturing member 1 having such a configuration can be easily manufactured.

  Further, as the reinforcing metal fitting 3, for example, as shown in FIG. 9A, a pair of side plate portions 31 that face each other, a bridging portion 32 that bridges one ends of the pair of side plate portions 31, and the pair of side plates You may form what comprises the return part 34 provided by bending each free end of the part 31. FIG.

  That is, the reinforcing metal fitting 3 is provided with a return portion 34 by bending each free end of the pair of side plate portions 31. The pipe-making member 1 manufactured using the reinforcing metal fitting 3 has a return portion 34 existing at each free end of the pair of side plate portions 31 in the reinforcing metal fitting 3, the inner wall 233 of the rib to be reinforced 230, and the eaves portion. The reinforcing metal fitting 3 is fitted and fixed in a state of being inserted between the return portion 232 provided at one end of 231 (see FIG. 9B).

  In this pipe-making member 1, the return portion 34 that increases the bulk of each free end of the side plate portion 31 in the reinforcing metal fitting 3 is provided in the inner wall 233 of the reinforcing rib 230 and the eave portion 231 provided on the reinforcing rib 230. Since it is inserted between the return portions 232, the torsional stress is applied to the tube-forming member 1 during pipe-making, and the reinforcing metal fitting 3 is more capable of being tilted in the direction in which the two reinforcing ribs 230 are opened to each other. It is harder to come off.

  Here, a bulky return portion provided at each free end of the side plate portion 31 in the reinforcing metal fitting 3 by simply pushing the reinforcing metal fitting 3 from the bridge portion 32 side between the two reinforced ribs 230 in the band-like member 2. 34 is inserted between the inner wall 233 of the reinforced rib 230 and the return portion 232 of the eave portion 231 provided on the reinforced rib 230, so that it is very difficult to manufacture the pipe-making member 1. However, according to the manufacturing method of the pipe manufacturing member 1 of the present invention, even the pipe manufacturing member 1 having such a configuration can be easily manufactured.

  By the way, in embodiment mentioned above, the male fitting part 24 and the female fitting part which were each provided in the one side edge part and other side edge part of the board | substrate 21 about the manufactured member 1 for pipe making. Although the thing which has a joining means by the fitting with 25 is used, as the member 1 for pipe making, it is not restricted to what has a joining means by such a fitting. The member 1 for pipe making may be joined by, for example, a joining means by adhesion or heat fusion. Moreover, it may join by the joining mechanism as shown to Fig.10 (a) and FIG.10 (b). The tube-forming member 1 shown in FIG. 10 is formed by molding a thermoplastic resin into a long shape, and the side edges are connected to each other using a long strip-shaped connector 140.

  That is, the joint recessed part 112 is formed in the both-sides edge part of this member 1 for pipe making along the longitudinal direction, respectively. In addition, the connector 140 is formed with two joint convex portions 141 that can be joined to the joint concave portion 112 of the pipe-making member 1 in parallel with each other along the longitudinal direction.

  Then, the pipe-forming member 1 having such a form is wound spirally in a state in which one of the joint convex portions 141 of the connector 140 is fitted into one side of the joint concave portion 112 at both side edge portions thereof. Form. In the winding process, as shown in FIGS. 10 (a) and 10 (b), one of the two pipe-forming members 1 adjacent to each other is joined to the joint recess 112 of one pipe-making member 1, and the other pipe-making use. By fitting the joint convex portion 141 of the connector 140 fitted into the joint concave portion 112 of the member 1, these adjacent pipe-forming members 1 can be joined to each other.

  In the embodiment described above, the manufactured pipe-making member 1 has been exemplified in which the reinforcing metal fitting 3 is fitted and fixed between the adjacent reinforcing ribs 230, but the reinforcing rib 230 is not necessarily adjacent. However, the ribs 30 may be interposed between the ribs 230 to be reinforced.

  By the way, in this embodiment, although the strip | belt-shaped member formation process, the reinforcement metal fitting formation process, and the fitting process are performed continuously, you may perform each process independently. Moreover, about the strip | belt-shaped member 2 and the reinforcement metal fitting 3, you may convey the thing manufactured in another factory, or you may purchase and use the thing manufactured by the other company.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used as a method for manufacturing a pipe-making member in which a reinforcing metal fitting is hardly detached even when a torsional stress is applied during pipe-making.

DESCRIPTION OF SYMBOLS 1 Pipe-making member 2 Band-shaped member 21 Board | substrate 211 Front surface 212 Back surface 23 Rib 230 Reinforced rib 231 Eave part 232 Return part 233 Inner side wall 3 Reinforcement metal fitting 31 Side plate part 32 Bridging part 33 Tongue piece 34 Return part 30 Metal plate 4 For temporary fixation Pinch roller 41 Upper roller 42 Lower roller 51 Back support roller 52 Reinforcing bracket support roller 6 First pressing member 61 Convex roller 7 Second pressing member 71 Concave roller

Claims (2)

A long strip-shaped substrate, a plurality of ribs provided along the length direction of the surface of the substrate, and two opposing ribs selected from the plurality of ribs, on opposite inner walls, or at the apex The two strips in the belt-shaped member each provided with a pair of eaves protruding in opposite directions and a return portion protruding toward the surface of the substrate provided at one end of each eave. A pipe-making member is manufactured by fitting and fixing a reinforcing fitting including a pair of side plate portions facing each other and a bridging portion that bridges one ends of the pair of side plate portions along the ribs to be reinforced. A method for manufacturing a pipe-making member,
In fitting and fixing the reinforcing metal fittings between the two ribs to be reinforced,
By pushing the reinforcing bracket from one end side of the pair of side plate portions between the two ribs to be reinforced in the strip-shaped member, the return portions are abutted against the side surfaces of the pair of side plate portions of the reinforcing bracket. In the state of contact, temporarily tighten the reinforcing bracket between the two ribs to be reinforced,
Next, the substrate is supported by supporting the two positions facing each other across the two reinforced ribs of the substrate from the back surface side of the substrate, and pressing the reinforcing metal fitting from the front surface side of the substrate. To each of the eaves part, and to apply a biasing force toward each side plate part against which the return part abuts, and with the biasing force, each free end that is the other end side of the pair of side plate parts, respectively. A pipe-forming member characterized by being inserted between an inner wall of the rib to be reinforced and the return portion, so that the reinforcing metal fitting is fitted and fixed along between the two ribs to be reinforced in the band-shaped member. Production method. In the manufacturing method of the member for pipe making according to claim 1,
A first pressing member provided with a convex roller subjected to taper processing that increases the outer diameter from both ends of the outer peripheral surface toward the center;
A second pressing member provided with a concave roller subjected to a taper process that reduces the outer diameter from both ends of the outer peripheral surface toward the center, and
By making the outer peripheral surface of the concave roller abut on the back side of the substrate, the two convex portions of the substrate facing each other across the ribs to be reinforced are supported from the back side of the substrate, while the convex A manufacturing method of a member for pipe making which curves the substrate by pressing the reinforcing metal fitting from the surface side of the substrate on the outer peripheral surface of the roller.

Images