JP2012250415A - Member for pipe manufacturing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new member for pipe manufacturing which prevents detachment of reinforcement metal fittings even when torsion stress is applied during the pipe manufacturing.SOLUTION: The member 1 for pipe manufacturing includes: a long band-shaped base plate 2; a plurality of ribs 3 installed along the lengthwise direction of a surface 20 of the base plate 2; and the reinforcement metal fittings 4 each fitted and fixed between opposing inner walls 301 of two reinforced ribs 30 selected from the plurality of ribs 3. Each of the reinforced ribs 30 is supported by a stay 6 installed on an outer wall 302 side of the reinforced rib 30.

Description

  The present invention relates to a tube-forming member that is wound in a spiral shape and is formed into a tubular shape by sequentially joining adjacent side edges.

  Conventionally, as a method to rehabilitate existing pipes such as sewage pipes, water pipes, agricultural water pipes, gas pipes, etc. 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. 9, when forming the rehabilitation pipe 130 in the existing pipe 200, the winding drum 91 around which the pipe-making member 1 is wound is arranged on the ground and the pipe making apparatus 100 is arranged in the existing pipe 200. To do. The pipe making member 1 fed from the winding drum 91 is supplied to the pipe making apparatus 100 via the start side shaft 210. The pipe manufacturing apparatus 100 spirally winds the continuously supplied pipe manufacturing member 1, and the one side edge of the preceding pipe manufacturing member 1 and the other side edge of the pipe manufacturing member 1 that follows with a delay in circulation. By sequentially joining the one side edge and the other side edge while adjoining each other, the remanufactured pipe 130 additionally formed in a spiral shape is sequentially left to move toward the arrival side shaft 220 To do. The pipe making apparatus 100 is driven by pressure oil supplied from a hydraulic unit 93 disposed in front of the pipe making apparatus 100 in the moving direction. The hydraulic unit 93 is driven by electric power supplied from a generator 92 arranged on the ground.

  As the tube-forming member 1 used in this method, as shown in FIG. 10A, a long strip-shaped substrate 2 and a plurality of ribs provided along the length direction of the surface 20 of the substrate 2 3 and a reinforcing metal fitting 4 fitted and fixed between opposing inner side walls 301 of two ribs to be reinforced 30 selected from the plurality of ribs 3 have been developed (for example, the following patent document) 1).

JP 11-235757 A

  In this type of pipe making member 1, the rib 3 is provided to increase the strength of the rehabilitating pipe 130 when the pipe making member 1 is made into the rehabilitation pipe. And the said reinforcement metal fitting 4 bears the role which reinforces the said rib 3 (especially to-be-reinforced rib 30), and further improves the intensity | strength of the rehabilitation pipe | tube 130. FIG.

  However, when the rehabilitated pipe 130 is manufactured, a twisting stress is always applied to the pipe-forming member 1 supplied while being spirally wound in the existing pipe 200, and when receiving the torsional stress, In some cases, the two reinforcing ribs 30 are inclined in the direction of opening to each other, and the reinforcing metal fitting 4 is detached (see FIG. 10B).

  The present invention has been developed to solve the above technical problem, and an object of the present invention is to provide a new pipe-making member in which a reinforcing metal fitting is difficult to come off even when a torsional stress is applied during pipe making. .

  The tube-making member of the present invention is a tube-making member that is wound in a spiral shape and is formed into a tubular shape by sequentially joining adjacent side edges. A plurality of ribs provided along the length direction of the surface of the substrate, and a reinforcing metal fitting fitted and fixed between opposing inner side walls of two ribs to be reinforced selected from the plurality of ribs. The ribs to be reinforced are respectively supported by stays provided on the respective outer wall sides, and the position of the rib to be reinforced supported by the stays is a position that is half the height of the ribs to be reinforced. It is characterized in that it is set closer to the free end side.

  In the member for pipe making of the present invention, the rib to be reinforced and another rib adjacent on the outer wall side of the rib to be reinforced are connected via a bridge member, and the bridge member in the rib to be reinforced It is a preferable aspect that the position supported by is set to the free end side from the half of the height of the rib to be reinforced.

  In the member for pipe making of the present invention, a preferred embodiment is such that the thickness of the portion existing between the two reinforced ribs of the substrate is larger than the thickness of the other portions of the substrate.

  The member for pipe making of the present invention has an effect that the reinforcing metal fitting is difficult to come off even when a twisting stress is applied during pipe making.

FIG. 1A is a cross-sectional view showing a pipe-making member according to the first embodiment of the present invention, FIG. 1B is a cross-sectional view showing a joined state of the pipe-making member, and FIG. It is sectional drawing which shows the state by which the torsional stress was loaded to the member. FIG. 2A is a cross-sectional view showing a pipe-making member according to the second embodiment of the present invention, and FIG. 2B is a cross-sectional view showing a state in which a twisting stress is applied to the pipe-making member. Fig.3 (a) is sectional drawing which shows the member for pipe making of this invention which concerns on Embodiment 3, (b) is sectional drawing which shows the state by which the torsional stress was loaded to the member for pipe manufacturing. FIG. 4A is a cross-sectional view showing a pipe-making member of the present invention according to Embodiment 4, and FIG. 4B is a cross-sectional view showing a state in which a twisting stress is applied to the pipe-making member. Fig.5 (a) is sectional drawing which shows the member for pipe manufacture concerning the reference form 1, (b) is sectional drawing which shows the state by which the torsional stress was loaded to the member for pipe manufacturing. FIG. 6A is a cross-sectional view showing a pipe-making member according to Reference Embodiment 2, and FIG. 6B is a cross-sectional view showing a state in which a twisting stress is applied to the pipe-making member. FIGS. 7A to 7D are cross-sectional views illustrating other examples of the pipe-making member of the present invention. FIG. 8A is a cross-sectional view showing a pipe-making member of the present invention joined by fitting a separate connector, and FIG. 8B is a perspective view showing a state in which the pipe-making member is joined. . FIG. 9 is an explanatory view schematically showing a state where an existing pipe is being rehabilitated. FIG. 10A is a cross-sectional view showing a conventional pipe-making member, and FIG. 10B is a cross-sectional view showing a state in which torsional stress is applied to the pipe-making member.

  Hereinafter, although the form for implementing this invention is demonstrated, this invention is not limited to these embodiment.

[Embodiment 1]
FIG. 1A shows a pipe manufacturing member 1 according to the first embodiment of the present invention. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  The substrate 2 is formed in a long band shape by extrusion molding using a synthetic resin such as polyvinyl chloride, polyethylene, polycarbonate and polyester alone or appropriately mixed. The substrate 2 may have its surface or interior reinforced with glass fiber or the like as necessary.

  The rib 3 is provided with a plurality of strips (four strips in the present embodiment) along the length direction of the surface 20 of the substrate 2, and has a cap portion 31 that extends toward both sides at each free end. In other words, the rib 3 has a T-shape when viewed in cross section. The rib 3 plays a role of increasing the strength of the rehabilitation pipe 130 when the pipe making member 1 is manufactured on the rehabilitation pipe 130. In the present embodiment, the rib 3 is integrally formed when the substrate 2 is formed.

  The two reinforcing ribs 30 are selected from the plurality of ribs 3. In the present embodiment, among the four ribs 3, the two ribs 3 adjacent to each other across the center line of the substrate 2 are used as the reinforcing ribs 30.

  The two reinforcing ribs 30 are respectively supported by stays 6 provided on the outer wall 302 side. The position supported by the stay 6 in the rib 30 to be reinforced is set to the free end side (umbrella 31 side) from the half of the height of the rib 6 to be reinforced. In the present embodiment, the stay 6 is integrally formed when the substrate 2 is formed.

  Further, a male fitting portion 21 and a female fitting portion 22 are provided on one side edge portion and the other side edge portion of the substrate 2. In the present embodiment, the male fitting portion 21 and the female fitting portion 22 are integrally formed when the substrate 2 is extruded. A seal member 5 made of a polyvinyl chloride elastomer is affixed in the vicinity of the male fitting portion 21. If the male fitting 22 is fitted into the female fitting portion 21, such a sealing member is provided. 5 is a mechanism for imparting water tightness to the joint.

  The reinforcing metal fitting 4 is formed by bending a metal plate by roll forming, and includes a bottom plate portion 41 and a pair of opposing side wall portions 42. In addition, an eaves portion 43 extending in a direction facing each other is provided at one end of each side wall portion 42 in the reinforcing metal fitting 4.

  The interval between the bottom plate portion 41 and the eaves portion 43 in the reinforcing metal fitting 4 is set to be the same as or slightly shorter than the interval between the umbrella portion 31 and the surface 20 of the substrate 2 in the reinforcing rib 30. Accordingly, if the reinforcing metal fitting 4 is pushed from the bottom plate portion 41 side toward the two ribs to be reinforced 30 provided on the substrate 2, and the bottom plate portion 41 is brought into contact with the surface of the substrate 2, The eaves portion 43 in the reinforcing metal fitting 4 is inserted into the lower surface of the umbrella portion 31 provided on the rib 30. As a result, the pipe-making member 1 of the present invention is constructed in which the reinforcing metal fitting 4 is fitted and fixed between the opposing inner side walls 301 of the two reinforcing ribs 30. The reinforcing metal fitting 4 fitted and fixed plays a role of reinforcing the reinforcing rib 30.

  The pipe-forming member 1 is spirally wound, and the male fitting 22 is sequentially placed on the female-type fitting portion 21 in a state where the preceding pipe-forming member 1 and the subsequent pipe-making member 1 are delayed. When fitted, the rehabilitation pipe 130 is manufactured (see FIG. 1B). At the time of producing the rehabilitated tube 130, the torsional stress is always applied to the tube-forming member 1 supplied while being wound spirally.

  In the present embodiment, the two reinforcing ribs 30 in the pipe-making member 1 are respectively supported by the stays 6 provided on the respective outer walls 302 side, and the stays 6 in the reinforcing ribs 30 are supported by the stays 6. Since the supported position is set on the free end side from the half of the height of the rib 6 to be reinforced, even when a twisting stress is applied to the tube-forming member 1, It is suppressed that the to-be-reinforced ribs 30 are tilted in the direction of opening each other (see FIG. 1C). This prevents the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 from being removed during pipe making.

[Embodiment 2]
FIG. 2 (a) shows a member 1 for pipe making according to the second embodiment of the present invention. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  In the pipe-making member 1 according to this embodiment, in each of the ribs 30 to be reinforced, the free ends of the ribs 30 to be reinforced and the free ends of other ribs 3 adjacent on the outer wall 302 side of the ribs 30 to be reinforced are provided. The structure is the same as that of the first embodiment except that they are connected via the bridging member 7.

  The bridging member 7 supports the reinforced rib 30 and supports the reinforced rib 30 in the same manner as the stay 6 that supports a predetermined position provided on the outer wall 302 side of each of the two reinforced ribs 30 in the pipe forming member 1. When the torsional stress is applied, the two ribs to be reinforced 30 have an effect of preventing the two reinforcing ribs 30 from being inclined in the direction of opening each other (see FIG. 2B). As a result, it is further prevented that the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 is detached during pipe making.

  In this embodiment, the position supported by the bridging member 7 in the reinforced rib 30 is the free end of the reinforced rib 30, but the position supported by the bridging member 7 in the reinforced rib 30. May be on the free end side of the half of the height of the rib 30 to be reinforced.

[Embodiment 3]
FIG. 3A shows a pipe-making member 1 according to the third embodiment of the present invention. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  The member 1 for pipe making according to this embodiment is the same as that described above except that the thickness of the portion 2A existing between the two ribs to be reinforced 30 in the substrate 2 is larger than the thickness of the other portion 2B in the substrate 2. The configuration is the same as that of the first embodiment. In the present embodiment, the distance between the bottom plate portion 41 and the eaves portion 43 in the reinforcing metal fitting 4 is made shorter than that in the first embodiment because the thickness of the portion 2A existing between the two reinforcing ribs 30 is increased. Yes.

  In the pipe manufacturing member 1 according to this embodiment, the thickness of the portion 2 </ b> A existing between the two reinforcing ribs 30 in the substrate 2 is increased, so that a torsional stress is applied to the pipe manufacturing member 1. Even in this case, the portion 2A existing between the two reinforced ribs 30 having a large thickness is more difficult to bend than the other portion 2B. (See FIG. 3B). As a result, it is further prevented that the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 is detached during pipe making.

  The thickness of the portion 2A existing between the two reinforcing ribs 30 in the substrate 2 is preferably at least twice (about 2 to 4 times) the thickness of the other portion 2B in the substrate 2.

[Embodiment 4]
FIG. 4 (a) shows a member 1 for pipe making according to the fourth embodiment of the present invention. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  In the pipe-making member 1 according to this embodiment, in each of the ribs 30 to be reinforced, the free ends of the ribs 30 to be reinforced and the free ends of other ribs 3 adjacent on the outer wall 302 side of the ribs 30 to be reinforced are provided. The thickness of the portion 2A existing between the two ribs to be reinforced 30 in the substrate 2 is made larger than the thickness of the other portion 2B in the substrate 2. Other than that, the configuration is the same as that of the first embodiment.

  In the pipe-making member 1 according to the present embodiment, the two ribs to be reinforced 30 in the pipe-making member 1 are respectively supported by stays 6 that support predetermined positions provided on the outer wall 302 side. In each of the reinforced ribs 30, the free end of the reinforced rib 30 and the free end of another rib 3 adjacent on the outer wall 302 side of the reinforced rib 30 are connected via the bridging member 7. In addition, since the thickness of the portion 2A existing between the two ribs to be reinforced 30 in the substrate 2 is larger than the thickness of the other portion 2B in the substrate 2, a torsional stress is applied to the tube-forming member 1. Even when the two ribs are reinforced, it is possible to more effectively suppress the two reinforcing ribs 30 from being inclined in the direction of opening each other (see FIG. 4B). This prevents the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 from being removed during pipe making.

[Reference Form 1]
FIG. 5A shows a pipe-making member 1 according to Reference Embodiment 1. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  In the member 1 for pipe making according to the reference form 1, in each of the ribs 30 to be reinforced, the free end of the rib 30 to be reinforced and the free ends of other ribs 3 adjacent on the outer wall 302 side of the rib 30 to be reinforced are provided. Are connected via a bridging member 7.

  The tube-forming member 1 according to the reference mode 1 is not provided with the stay 6 that supports the two reinforced ribs 30. However, in each of the reinforced ribs 30, the free end of the reinforced rib 30 and the reinforced member are provided. Since the free end of another rib 3 adjacent on the outer wall 302 side of the rib 30 is connected via the bridging member 7, even when a torsional stress is applied to the tube-forming member 1. It is possible to suppress the two reinforcing ribs 30 from being inclined in the direction of opening each other (see FIG. 5B). This prevents the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 from being removed during pipe making.

[Reference Form 2]
FIG. 6 (a) shows the pipe-making member 1 according to the second embodiment of the present invention. The pipe-forming member 1 includes a long strip-shaped substrate 2, a plurality of ribs 3 provided along the length direction of the surface 20 of the substrate 2, and two strips selected from the plurality of ribs 3. And a reinforcing metal fitting 4 fitted and fixed between the opposing inner side walls 301 of the rib to be reinforced 30.

  In the member 1 for pipe making according to the reference form 1, the thickness of the portion 2A existing between the two reinforcing ribs 30 in the substrate 2 is larger than the thickness of the other portion 2B in the substrate 2.

  The tube-forming member 1 according to the reference form 2 is not provided with the stay 6 that supports the two reinforcing ribs 30, but the thickness of the portion 2 </ b> A existing between the two reinforcing ribs 30 in the substrate 2 is Since the thickness of the other part 2B of the substrate 2 is larger than that of the other part 2B, even when a twisting stress is applied to the tube-forming member 1, the two reinforcing ribs 30 are inclined in the direction of opening each other. It can suppress (refer FIG.6 (b)). This prevents the reinforcing metal fitting 4 fitted and fixed between the two reinforcing ribs 30 from being removed during pipe making.

  In Embodiments 1 to 4 (and Reference Embodiments 1 and 2), the two ribs 3 adjacent to each other across the center line of the substrate 2 are selected as the reinforcing ribs 30. The reinforcing ribs 30 do not necessarily have to be adjacent to each other. For example, like the pipe-forming member 1 shown in FIGS. 7A to 7D, the two reinforcing ribs 30 selected from the ribs 3 are not adjacent to each other, and the rib 3 is interposed between the two reinforcing ribs 30. There may be a single article (or a plurality of articles).

  In this case, since the reinforcing metal fitting 4 needs to have a shape that can be fitted and fixed between the two ribs to be reinforced 30 in a state of straddling the ribs 3 existing between the two ribs to be reinforced 30, the bottom plate portion 41 is formed. A bent cross-sectional view W-shaped.

  Since the bottom plate portion 41 is bent, the reinforcing metal fitting 4 has an action of following the deformation of the pipe-making member 1 while being elastically deformed. Thereby, even when a torsional stress is applied to the tube-forming member 1, the reinforcing metal fitting 4 is further prevented from coming off.

  In Embodiments 1 to 4 (and Reference Embodiments 1 and 2), the pipe-making member 1 having the T-shaped rib 3 in cross-section is used, but the rib 3 is the pipe-making member 1. Are not limited to those having ribs of such a shape, and for example, those having ribs 3 having a cross-shaped cross section may be used.

  In Embodiments 1 to 4 (and Reference Embodiments 1 and 2), male members provided respectively on one side edge and the other side edge of the substrate 2 as a joining means for the tube-forming member 1. Although the joining means by fitting the mold fitting portion 21 and the female fitting portion 22 is used, the joining means of the pipe-making member 1 is not limited to such joining means by fitting. The member 1 for pipe making may be joined by, for example, a joining means by adhesion or heat fusion, or joined by a joining mechanism as shown in FIGS. 8 (a) and 8 (b). It may be a thing.

  The tube-forming member 1 shown in FIG. 8 is formed by molding a synthetic resin into a long shape, and a plurality of ribs 3 are formed along the longitudinal direction. The parts are connected to each other.

  That is, the joint recessed part 112 is each formed in the both-sides edge part of this pipe manufacturing member 1 along a longitudinal direction. 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 configuration is wound spirally in a state in which one of the joint convex portions 141 of the connector 140 is fitted into one of the joint concave portions 112 at both side edges thereof, and the rehabilitated pipe 130 is wound. Form. In the winding process, as shown in FIGS. 8 (a) and 8 (b), one of the two pipe-making 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 band-like members 1 can be joined to each other.

  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.

  The pipe-making member of the present invention is spirally wound and piped into a tubular shape by sequentially joining adjacent side edges, and an aged sewer pipe, an upper water pipe, It can be suitably used when rehabilitating existing pipes such as agricultural waterways and gas pipes.

DESCRIPTION OF SYMBOLS 1 Pipe manufacturing member 2 Board | substrate 20 Surface 21 Male type fitting part 22 Female type fitting part 3 Rib 30 Reinforced rib 301 Inner side wall 302 Outer side wall 31 Umbrella part 4 Reinforcing metal fitting 41 Bottom plate part 42 Side plate part 43 Eave part 5 Seal member 6 Stay 7 Bridge member 130 Rehabilitation pipe

Claims (3)

It is a member for pipe making which is wound in a spiral shape and is formed into a tubular shape by sequentially joining adjacent side edges,
A long strip of substrate,
A plurality of ribs provided along the length direction of the surface of the substrate;
Reinforcing metal fittings fitted and fixed between opposing inner side walls of the two reinforcing ribs selected from the plurality of ribs;
Comprising
Each of the ribs to be reinforced is supported by a stay provided on each outer wall side,
The pipe-making member, wherein a position of the rib to be reinforced supported by the stay is set to a free end side from a position half the height of the rib to be reinforced. In the member for pipe making according to claim 1,
The rib to be reinforced and another rib adjacent on the outer wall side of the rib to be reinforced are connected via a bridging member,
A member for pipe making, wherein a position of the reinforced rib supported by the bridging member is set closer to a free end side than a half of the height of the reinforced rib. In the member for pipe making according to claim 1 or 2,
The member for pipe making by which the thickness of the part which exists between the said 2 ribs to be reinforced in the said board | substrate was made larger than the thickness of the other part in the said board | substrate.

Images