JP6581407B2 - Band member connection structure - Google Patents

Description

  The present invention relates to a connection structure for belt-shaped members that connects belt-shaped members for rehabilitating existing pipes in the longitudinal direction.

  Conventionally, a spiral belt (rehabilitated pipe) is manufactured in an existing pipe by connecting the connecting parts of the side edges that are close to each other while spirally winding a long band-shaped member having connecting parts formed on both side edges. By doing so, it is widely practiced to rehabilitate old pipes.

  As described above, when a rehabilitated pipe is manufactured using a belt-shaped member, it is ideal to construct the rehabilitated pipe with a single belt-shaped member, but when the extension of the existing pipe to be rehabilitated is long. In some cases, the belt-like member is insufficient during the production of the rehabilitation pipe. In such a case, it is possible to connect the end of the new band-shaped member to the end of the band-shaped member that is already being manufactured, in other words, to connect the band-shaped members to each other in the longitudinal direction in the course of pipe manufacturing. Necessary.

  For example, Patent Document 1 discloses a profile in which a reinforcing portion in which a metal reinforcing material is embedded is formed in a synthetic resin band plate-like substrate body portion so that a hollow section having a triangular cross section is formed. When connecting (band-like members) to each other, with the metal joint inserted in the hollow portion, after fusing the end faces of the substrate body, the reinforcing portion is shaved so that the reinforcing material is exposed. A method for connecting a profile for spot welding a metal joint is disclosed.

Japanese Patent Laid-Open No. 10-16051

  By the way, since the thing of the said patent document 1 is applied to the strip | belt-shaped member for rehabilitating a box culvert, it assumes connecting straight strip | belt-shaped members in a longitudinal direction. Moreover, since the thing of patent document 1 carries out the spot welding of a reinforcing material and a metal joint, since it is necessary for the reinforcing material and the metal joint to be crimped | bonded, a metal joint fits in a hollow part without gap. Can be said to be the premise.

  On the other hand, recently, when rehabilitating an existing pipe with a circular cross section using a belt-like member to which a metal reinforcing member is attached, the belt-like member including the reinforcing member is dedicated at the construction site so as to bend with a predetermined curvature. It is widely practiced to forcibly wind the band-shaped member and the reinforcing member using this device (hereinafter also referred to as a winding device). As described above, the advantage of forcing the band-shaped member and the reinforcing member to curl is that the undesirable curl generated by being wound on the drum at the time of carrying in the construction site is corrected, and is close to the curvature after pipe making. It is easy to produce ideal rehabilitation pipes by giving a curvature, and by adjusting the curvature, it is possible to carry a belt-like member into an existing human hole through a narrow human hole opening of about φ600 mm, for example. It becomes possible.

  However, when the band-shaped members curved with a predetermined curvature are connected in the longitudinal direction using the connection method described in Patent Document 1, the following problems occur. That is, when the metal joint is curved corresponding to the curved band-shaped member, it is difficult to fit the curved metal joint without a gap in the space defined by the band-shaped member and the reinforcing member. There is. Therefore, it is conceivable to use a relatively small metal joint that can be smoothly inserted into the space defined by the belt-shaped member and the reinforcing member. However, since the reinforcing material and the metal joint are not pressure-bonded, the reinforcing material is used. It becomes difficult to spot weld the metal joint. Therefore, it is conceivable that the reinforcing material and the metal joint are not spot-welded, but if the metal joint is simply inserted into the space defined by the belt-like member and the reinforcing member, the metal joint may be displaced from the connection portion. Furthermore, it is difficult to fuse the curved strip members, and when the fusion is insufficient, when the connection portion passes a roller or the like for sending the strip member in the pipe making machine, There is a possibility that the band-shaped member may be twisted.

  The present invention has been made in view of such points, and the object of the present invention is to provide a belt-like member connection structure for rehabilitating an existing pipe, even when the belt-like member is curved with a predetermined curvature. The object is to provide a technique for reliably connecting members in the longitudinal direction.

  As a result of intensive studies to solve the above problems, the present inventors have obtained the following knowledge.

  That is, if the connection part of the belt-like member functions alone even after being piped, the same characteristics as other parts (parts other than the connection part) are required, and therefore equivalent to other parts. It is necessary to restore (reinforce) the cross-sectional performance. However, the connecting portion of the belt-shaped member does not exist independently in the regenerated pipe that has been manufactured, but in a state where both side edges are connected to other parts, in other words, surrounded by other parts. Exists. For this reason, for example, even when some force acts on the connection portion in the rehabilitation pipe, the force is dispersed to some extent in the vicinity of the connection portion. If, for example, a relatively low-strength belt-shaped member or the like passes through a pinch roller, and a high-rigidity belt-shaped member or the like has a large bending moment during pipe production, If it has a cross-sectional performance that does not become a starting point of stress concentration after pipe making, it is not necessary to restore it to the same cross-sectional performance as other parts. Absent. In other words, when connecting the belt-shaped members in the longitudinal direction, it is not important to restore the connecting portion to be equal to other parts, but in a manner that compensates for the characteristics that are insufficient depending on the type of the belt-shaped member. It is important to connect the members. Thus, the present inventors have made the present invention based on this finding.

  Specifically, according to the present invention, the strip-shaped members curved with a predetermined curvature are formed in the longitudinal direction by forming the rehabilitating pipe in the existing pipe by connecting the side edges close to each other while being spirally wound. The connection structure of the strip-shaped member connected to is intended.

The connection structure of the belt-shaped member, in each of the above-mentioned belt-shaped member, a reinforcing member that is curved and the integral with the respective strip-like member extending in the longitudinal direction of the respective strip-like member is attached, et al is in in the respective strip A connecting member for connecting the connecting end portions is attached to a portion where the connecting end portion of the band-shaped member including the reinforcing member needs to be reinforced , and the reinforcing member includes the reinforcing member and the band-shaped member. And is attached to the outer peripheral side of the belt-like member so that a space partitioned by is formed, and the connection member is inserted into the space and is in surface contact with a portion requiring reinforcement. It has a curvature.

  According to this configuration, for example, in the case of a high-rigidity belt-shaped member, the outermost portion of the reinforcing member that generates a large bending moment, and in the case of a relatively low-rigidity belt-shaped member, a roller in a pipe making machine Since the connecting member is attached to the part that needs reinforcement, such as on the side edge of the belt-like member that is likely to be twisted when passing through the connecting end portions, the connecting end portions are compensated for while compensating for the insufficient characteristics in the connecting portion. Can be securely connected.

  In addition, since the connecting member has a curvature that makes surface contact with a portion requiring reinforcement, it can be easily attached to the portion using a fastening member such as a screw or a rivet. Since the connection member attached in this way is in surface contact instead of point contact or line contact with a portion requiring reinforcement, it is possible to effectively compensate for the insufficient characteristics in the connection portion.

  It should be noted that the “site requiring reinforcement” can be specified by CAE (Computer Aided Engineering) analysis, empirical rules, or the like. Further, the “site requiring reinforcement” is not limited to one place, and may be a plurality of places.

Further, in the connection structure of the belt-shaped member, the upper Symbol reinforcement is required site, in the reinforcing member is a portion of the outermost peripheral side for partitioning the space, the connecting member is a portion of the upper Symbol outermost peripheral side It is preferable to have such a shape that the surface is in contact with the inner surface and a gap is formed between the belt-shaped member.

  According to this configuration, the connecting member has a shape and dimension so that a gap is formed between the connecting member and the band-shaped member in a state where the connecting member is inserted into the space defined by the reinforcing member and the band-shaped member. The curved connecting member can be smoothly inserted into the space. Moreover, since the connection member is attached to the reinforcement member in a state of being in surface contact with the outermost peripheral portion of the reinforcement member, it is possible to efficiently increase the cross-sectional second moment of the reinforcement member at the connection portion. . Therefore, even when a large bending moment is generated during pipe production and after pipe production, the connection end portions can be reliably connected to each other while preventing the band-like member from being damaged from the connection portion.

  Furthermore, in the connection structure of the band-shaped member, the space is formed such that the cross-sectional shape in the direction perpendicular to the longitudinal direction of the band-shaped member is rectangular or trapezoidal, and the cross-sectional shape of the connection member is the band-shaped member. A C-shape or a rectangular shape opening to the side is preferred.

  According to this configuration, by adopting a so-called C channel shape or rectangular shape having a high rigidity as the cross-sectional shape of the connection member, the cross-section of the reinforcing member in the connection portion can be obtained even with a light connection member having a relatively small thickness. The second moment can be increased.

  Moreover, in the connection structure of the said strip | belt-shaped member, it is preferable that the said connection member is attached to the said reinforcement member via the fastening member.

  As described above, since the connecting member is in surface contact with a portion requiring reinforcement, it can be easily attached to the portion using a fastening member such as a screw or a rivet. In addition, unlike welding, since heat does not enter the base material (strip member), deformation and deterioration of the strip member can be suppressed.

  As described above, according to the connection structure for strip members according to the present invention, the strip members can be reliably connected in the longitudinal direction even when the strip members are curved with a predetermined curvature.

It is a perspective view which shows typically the rehabilitation pipe | tube in the middle of pipe manufacture to which the connection structure of the strip | belt-shaped member which concerns on Embodiment 1 of this invention is applied. It is a longitudinal cross-sectional view which shows typically the connection structure of a strip-shaped member. It is an end view of the connection end part of a strip-shaped member. It is a perspective view which shows a connection member typically. It is a figure which illustrates typically the connection procedure using a connection member. 10 is an end view of a connection end portion of a belt-like member according to Modification Example 1. FIG. 10 is an end view of a connection end portion of a band-shaped member according to Modification 2. FIG. 6 is an end view of a connection end portion of a belt-like member according to Embodiment 2. FIG. It is an end view of the connection end part of the strip | belt-shaped member which concerns on other embodiment. It is an end view of the connection end part of the strip | belt-shaped member which concerns on other embodiment. It is a perspective view explaining typically the connection structure of the side edge parts of the strip shaped member concerning other embodiments.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing a rehabilitation pipe 2 in the middle of pipe making, to which the connection structure 1 of the band-like member 10 according to the present embodiment is applied. In FIG. 1, in order to make the drawing easy to see, only the pinch roller 3 for supplying the belt-like member 10 is shown in the pipe making machine for making the rehabilitated pipe 2, and a reinforcing member 50, which will be described later, The strip members 10 are simplified by omitting the reinforcing ribs 14 and 15. The rehabilitation pipe 2 is used to rehabilitate the existing pipe 4 that has deteriorated. The existing pipe 4 such as a sewer pipe, a water pipe, an agricultural water pipe, or a gas pipe has fitting portions 12 and 13 (FIG. The long belt-like member 10 on which the reference is formed is spirally wound while fitting the fitting portions 12 and 13 of the overlapping side edge portions into a tubular shape. More specifically, the rehabilitating pipe 2 is fitted into a band-shaped member 10A formed in a tubular shape in advance by the band-shaped member 10B supplied in the direction of the white arrow in FIG. By being fitted and added at 5, the hook is also formed to extend in the extending direction of the existing pipe 4.

  As described above, when the rehabilitated pipe 2 is manufactured using the belt-like member 10, it is ideal to configure the rehabilitated pipe 2 with the single belt-like member 10, but the extension of the existing pipe 4 to be rehabilitated. 1 is long, the belt-like member 10 may become insufficient during the production of the renovated pipe 2 as shown in FIG. In such a case, as shown by the black arrow in FIG. 1, it is possible to connect the end of the new band-shaped member 10C to the end of the band-shaped member 10B that has already been pipe-formed. In the middle, it is necessary to connect the belt-like members 10B and 10C in the longitudinal direction.

  In the present embodiment, the band-shaped member 10 and the reinforcing member 50 are forcibly wound using a winding device (not shown) so that the band-shaped member 10 including the reinforcing member 50 is curved with a predetermined curvature. Therefore, when the belt-like member 10 becomes insufficient during the production of the rehabilitated pipe 2, the belt-like members 10 curved with a predetermined curvature are connected in the longitudinal direction.

  By the way, when connecting the belt-shaped members 10 in the longitudinal direction, not only connecting the connection end portions 9 (see FIG. 2) of the belt-shaped members 10 but also the connecting portion 7 (see FIG. 2) is extremely deformed. It is necessary to reinforce the connection end portion 9 of the belt-like member 10 including the reinforcing member 50 so as not to break or break.

  But the connection part 7 does not exist independently in the renovated pipe 2 manufactured, but the both-sides edge part exists in the state connected with the other site | part. For this reason, even when a force is applied to the connection portion 7 in the rehabilitation pipe 2, the force is dispersed to some extent in the vicinity of the connection portion 7. Therefore, the connecting portion 7 is not extremely deformed or damaged when passing through the pinch roller 3 or when a large bending moment is generated at the time of pipe production, and stress concentration after the pipe production, for example. If the cross-sectional performance is such that it does not become the starting point, it is not always necessary to restore (reinforce) the cross-sectional performance to the same level as other parts.

  Therefore, in the connection structure 1 of the band-shaped member 10 according to the present embodiment, a curvature that makes surface contact with a portion that requires reinforcement at a portion that requires reinforcement at the connection end portion 9 of the band-shaped member 10 including the reinforcement member 50. By attaching the connection member 70 having the connection end portions 9, the connection end portions 9 are connected to each other. It should be noted that the “site requiring reinforcement” can be specified by CAE (Computer Aided Engineering) analysis, empirical rules, or the like. Specifically, as shown in FIG. 2, an inner surface of the main reinforcing portion 51 is connected to a main reinforcing portion (the outermost peripheral portion) 51 in the reinforcing member 50 in which a large bending moment is generated during and after pipe making. The connection end portions 9 of the belt-like member 10 are connected to each other by attaching the connection member 70 having a curvature that makes surface contact. Hereinafter, the connection structure 1 of such a strip-shaped member 10 will be described in detail.

  FIG. 3 is an end view of the connection end 9 of the belt-like member 10. In addition, in FIG. 3, the strip | belt-shaped member 10 is shown so that the side (outer peripheral side) which becomes a radial direction outer side when it pipes to the rehabilitation pipe | tube 2 may become an upper side. The belt-like member 10 is formed in a long shape from a synthetic resin material such as hard vinyl chloride, polyethylene, or polypropylene. As shown in FIG. 3, the belt-like member 10 includes a belt-like substrate 11, mating portions 12 and 13 that are formed on both side edges of the substrate 11, and reinforcing ribs 14 and 15. And an engaging rib 16. Reference numeral 17 denotes a seal that is adhered to the substrate 11 and formed of an elastic material such as rubber or elastomer.

  The fitting protrusion 12 as the fitting portion is provided on the outer peripheral side surface of the side edge portion on one side in the width direction of the substrate 11 (the right side in FIG. 3). The front end 12a of the fitting protrusion 12 swells in a substantially circular cross section, and a step surface 12b is formed. A step portion 11 a corresponding to the thickness of the substrate 11 is formed at an end portion on the other side in the width direction of the substrate 11 (left side in FIG. 3). The fitting groove part 13 as a fitting part which makes a pair with the fitting protrusion part 12 is formed in the side edge part of the width direction other side of the board | substrate 11 which rose up via the step part 11a. The fitting groove 13 is open on the inner peripheral side (lower side in FIG. 3), and the entrance is narrowed. A step surface 13 a corresponding to the step surface 12 b of the fitting protrusion 12 is formed in the fitting groove portion 13.

  The reinforcing rib 14 is for increasing the rigidity of the belt-like member 10, and protrudes toward the one side in the width direction on the outer peripheral side surface of the substrate 11. The reinforcing rib 14 has a flange 14a at the tip and is formed in a T-shaped cross section. Further, the reinforcing rib 15 protrudes from a portion that swells to the outer peripheral side corresponding to the fitting groove portion 13, and is formed in a T-shaped cross section having a flange 15a at the tip end portion. The engagement rib 16 extends so as to be inclined toward the outer peripheral side from the side edge on the other side in the width direction toward the other side in the width direction.

  A metal reinforcing member 50 is attached to the belt-like member 10 between the reinforcing rib 14 and the reinforcing rib 15. The reinforcing member 50 is formed by bending a long strip-shaped steel plate, and extends toward the substrate 11 from the main reinforcing portion 51 facing away from the substrate 11 and both ends of the main reinforcing portion 51 in the width direction. Two leg portions 52, two base portions 53 extending outward in the width direction from the end portion on the substrate 11 side in each leg portion 52 and overlapping the substrate 11, and from the end portions on the outer side in the width direction of the respective base portions 53 outward in the width direction. And two inclined portions 54 extending inclined toward the outer peripheral side so as to move away from the substrate 11 as they go.

  The reinforcing member 50 formed in such a cross-sectional shape is pushed between the reinforcing rib 14 and the reinforcing rib 15, and the tips of both inclined portions 54 are engaged with the flanges 14 a and 15 a, respectively. It is attached to the outer peripheral side. Then, in a state where the reinforcing member 50 is attached to the belt-like member 10, as shown in FIG. 3, the base portion 53 and the substrate 11 overlap each other, and the main reinforcing portion 51, the two leg portions 52, and the substrate 11 A rectangular space S to be partitioned is formed.

  Prior to being introduced into the existing pipe 4, the belt-like member 10 and the reinforcing member 50 formed in this way are integrally bent with a predetermined curvature by the winding device. Thereafter, the belt-like member 10 with the curl is sent out by the pinch roller 3, and the fitting protrusion 12 has an inner circumference with respect to the fitting groove 13 of the belt-like member 10 </ b> A formed in a tubular shape in advance. The rehabilitating pipe 2 is configured by being fitted from the side and engaging with the flanges 14a of the reinforcing ribs 14 by engaging the engaging ribs 16 of the strip-shaped member 10A formed in a tubular shape in advance. Note that once the fitting protrusion 12 is fitted in the fitting groove 13, the stepped surface 12b and the stepped surface 13a mesh with each other so that the fitting protruding portion 12 does not easily come off.

  FIG. 4 is a perspective view schematically showing the connection member 70. As shown in FIG. 4, the connecting member 70 is curved as a whole. The connecting member 70 is in a state of being in a state of being in surface contact with the main reinforcing portion 51 of the reinforcing member 50 while being inserted into the space S and having a gap formed between the connecting member 70 and the belt-like member 10. Yes. Specifically, the connection member 70 includes a curved plate-shaped reinforcing portion 71 and two leg portions 72 extending from both ends in the width direction of the reinforcing portion 71 toward the center of curvature. As shown in FIG. 3, it is formed in a substantially C-shaped cross section. The reinforcing portion 71 has a curvature that makes surface contact with the main reinforcing portion 51 of the reinforcing member 50, and the leg portion 72 is formed shorter than the leg portion 52 of the reinforcing member 50. With such a shape and dimension, the connecting member 70 can be easily inserted into the space S defined by the main reinforcing portion 51, the two leg portions 52, and the substrate 11 without resistance.

  Then, the connecting member 70 is reinforced by the reinforcing portion 71 being fixed to the main reinforcing portion 51 via a screw (fastening member) 8 as shown in FIG. It is attached to the member 50. The leg portion 72 is also attached to the leg portion 52 of the reinforcing member 50 via the screw 8. As a result, almost the entire outer peripheral surface of the connecting member 70 comes into surface contact with the reinforcing member 50. Therefore, the connection member 7 has insufficient characteristics, specifically, a large bending moment generated during and after pipe making. It is possible to sufficiently compensate for the second moment of section.

  FIG. 5 is a diagram schematically illustrating a connection procedure using the connection member 70. When using the connecting member 70 to connect the connecting end 9B of the band-shaped member 10B that has already been piped and the connecting end 9C of the new band-shaped member 10C, first, the new band-shaped member 10C is wound. After attaching the curl with a predetermined curvature by the device, on the ground (before inserting into the existing manhole (not shown)), as shown in FIG. 5 (a), the reinforcing member 50 and the belt-like member 10C The connecting member 70 is inserted into the space S formed by the above.

  Next, as shown in FIG. 5B, the reinforcing part 71 is fixed to the main reinforcing part 51 via the screws 8 in a state where the reinforcing part 71 is in surface contact with the main reinforcing part 51 of the reinforcing member 50. At this time, the leg portion 72 is also fixed to the leg portion 52 of the reinforcing member 50 via the screw 8. In order to prevent the connection part 7 from interfering with the pinch roller 3 or the like, the screw 8 is set so that the outer surface of the main reinforcing part 51 or the leg part 52 and the head of the screw 8 are flush with each other. It is preferable to screw into the reinforcing member 50.

  Next, a new belt-like member 10C having the connecting member 70 attached to the tip (connecting end 9C) is introduced into the existing pipe 4 through the existing manhole. Then, after inserting the connection member 70 attached to the connection end portion 9C of the new band-shaped member 10C into the space S in the connection end portion 9B of the band-shaped member 10B, the connection member 9C is connected to the connection end portion 9C of the new band-shaped member 10C. Just as the connection member 70 is attached, as shown in FIG. 5C, the connection member 70 is attached to the connection end portion 9B of the belt-like member 10B.

  According to the connection structure 1 configured as described above, the connecting member 70 is in surface contact with the main reinforcing portion 51 of the reinforcing member 50 while being inserted into the space S, and between the band-shaped member 10. Since it has such a shape that a gap is formed, it can be easily inserted without resistance into the space S defined by the main reinforcing portion 51, the two leg portions 52, and the substrate 11. Further, since the connecting member 70 is attached so as to be in surface contact with the main reinforcing portion 51 located on the outermost peripheral side of the reinforcing member 50 where a large bending moment is generated, the sectional secondary moment of the reinforcing member 50 in the connecting portion 7 is obtained. Can be increased. As a result, even when a large bending moment is generated at the time of pipe making and after pipe making, it is possible to prevent the belt-like member 10 from being damaged with the connecting portion 7 as a base point. Moreover, since the reinforcing portion 71 of the connecting member 70 has a curvature that makes surface contact with the main reinforcing portion 51, it can be easily attached using the screws 8. Further, unlike welding, since heat does not enter the base material (band member 10), deformation and deterioration of the band member 10 can be suppressed.

-Modification of Embodiment 1-
<Modification 1>
In this modification, the shape of the reinforcing ribs 24 and 25 of the belt-like member 20 and the shape of the inclined portion 64 of the reinforcing member 60 are different from those of the first embodiment.

  FIG. 6 is an end view of the connection end portion of the belt-like member 20 according to this modification. In addition, the board | substrate 21, the step part 21a, the fitting protrusion 22, the front-end | tip part 22a, the level | step difference surface 22b, the fitting groove part 23, the level | step difference surface 23a, the engagement rib 26, the seal 27, the main reinforcement part 61, the leg part 62, The base 63 has a different reference numeral, but the substrate 11, the step 11a, the fitting ridge 12, the tip 12a, the step 12b, the fitting groove 13, the step 13a, and the engagement rib. 16, the seal 17, the main reinforcing part 51, the leg part 52, and the base part 53 have the same configuration.

  The reinforcing rib 24 protrudes toward the one side in the width direction on the outer peripheral side surface of the substrate 21. The reinforcing rib 24 has a flange 24a extending outward in the width direction at the tip, and is formed in an inverted L-shaped cross section. Further, an engaging portion 24b extending inward in the width direction is formed at the center of the reinforcing rib 24 in the projecting direction. On the other hand, the reinforcing rib 25 protrudes from a portion bulging on the outer peripheral side corresponding to the fitting groove 23, and is formed in an inverted L-shaped cross section having a flange 25a extending outward in the width direction at the tip. . In addition, an engaging portion 25b extending inward in the width direction is formed at the center of the reinforcing rib 25 in the projecting direction.

  The two inclined portions 64 of the reinforcing member 60 extend from the end portions of the base portions 63 on the outer side in the width direction so as to be separated from the substrate 21 toward the outer side. These inclined portions 64 are formed shorter than the inclined portion 54 so as to be engageable with the engaging portions 24b and 25b. The reinforcing member 60 formed in such a cross-sectional shape is pushed between the reinforcing rib 24 and the reinforcing rib 25, and the tips of both inclined portions 64 are engaged with the engaging portions 24b and 25b, respectively. It is attached to the outer peripheral side of the member 20.

  Thus, even when the attachment structure of the belt-like member 20 and the reinforcing member 60 is different, as shown in FIG. 6, the belt-like members 20 curved with a predetermined curvature are connected in the longitudinal direction using the connection member 70. can do.

<Modification 2>
This modified example is different from the modified example 1 in that the connecting member 80 is not substantially C-shaped in cross section but rectangular in cross section.

  FIG. 7 is an end view of the connection end portion of the belt-like member 20 according to this modification. The connection member 80 is curved as a whole like the connection member 70, and has two curved leg-shaped outer reinforcing portions 81 and two leg portions extending from both ends in the width direction of the outer reinforcing portion 81 toward the center of curvature. 82 and an inner reinforcing portion 83 that connects the ends of the two leg portions 82 and faces the outer reinforcing portion 81, and is formed in a rectangular cross section as shown in FIG. The outer reinforcing portion 81 has a curvature that makes surface contact with the main reinforcing portion 61 of the reinforcing member 60. Further, the leg portion 82 is formed shorter than the leg portion 62 of the reinforcing member 60, whereby a gap is formed between the inner reinforcing portion 83 and the belt-like member 20. With such a shape and dimension, it is possible to easily insert the connecting member 80 into the space S defined by the main reinforcing portion 61, the two leg portions 62, and the substrate 21 without resistance.

  Thus, the connecting member 80 is attached to the reinforcing member 60 by the outer reinforcing portion 81 being fixed to the main reinforcing portion 61 via the screw 8 in a state of being inserted into the space S. Although the leg portion 82 is not attached to the leg portion 62 of the reinforcing member 60, the connecting member 80 is formed in a rectangular cross section having a rigidity higher than that of the substantially C-shaped cross section. It is possible to sufficiently compensate for the cross-sectional secondary moment with respect to the large bending moment generated later.

(Embodiment 2)
The present embodiment is different from the first embodiment in that the metal plates 90 and 91 are attached not only to the reinforcing member 50 but also to the belt-like member 10.

  According to the connection structure 1 of the first embodiment, by attaching the connection member 70 to the main reinforcement portion 51 of the reinforcement member 50, the connection portion 7 can be used as a base point even when a large bending moment occurs during pipe production and after pipe production. As a result, the belt-like member 10 can be prevented from being damaged. However, focusing on the width direction of the band-shaped member 10, only about 1/5 to about 1/4 of the entire width of the band-shaped member 10 is connected by the connection member 70. For this reason, when the connection part 7 of the strip | belt-shaped member 10 passes the pinch roller 3, a twist arises in the connection part 7, and the connection part 7 and the fitting groove part 13 of 10 A of strip | belt-shaped members previously formed in the tubular shape and The fitting protrusions 12 in the vicinity thereof are not fitted, or the engagement ribs 16 of the strip-shaped member 10A formed in the tubular shape in advance are not caught by the flanges 14a of the connection parts 7 and the reinforcing ribs 14 in the vicinity thereof. It is also assumed that

  Therefore, in the present embodiment, metal plates (connection members) 90 and 91 different from the connection member 70 are also attached to the side edge portions of the connection end portion 9 of the belt-shaped member 10. That is, in this embodiment, the side edge part in the strip | belt-shaped member 10 is also contained in the site | part which needs reinforcement.

  FIG. 8 is an end view of the connection end 9 of the belt-like member 10 according to the present embodiment. As shown in FIG. 8, a plate-shaped metal plate 90 that is curved so as to be aligned with the seal 17 is attached between the fitting protrusion 12 and the reinforcing rib 14 in the substrate 11. Since the metal plate 90 has such a curvature that it comes into surface contact with the substrate 11 of the belt-like member 10 curved with a predetermined curvature, the metal plate 90 can be easily attached to the substrate 11 with screws 8 or the like. It is designed to be integrated with the substrate 11. On the other hand, a curved plate-shaped metal plate 91 is attached to the base of the engagement rib 16. Since the metal plate 91 has a curvature that makes surface contact with the engagement rib 16 of the belt-like member 10 curved with a predetermined curvature, the metal plate 91 is easily attached to the engagement rib 16 with a screw 8 or the like. And can be integrated with the engaging rib 16.

  Thus, in the belt-like member 10 of the present embodiment, not only the connection member 70 but also the metal plates 90 and 91 are attached, so that the central portion and both ends in the width direction of the belt-like member 10 are connected to the connection member 70 and the metal plate. Since it is reinforced by 90 and 91, the twist at the time of passing through the pinch roller 3 can be suppressed.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In each of the above-described embodiments, the connection member 70 is inserted into the space S. However, the present invention is not limited to this when the twist of the connection portion 7 is mainly suppressed. For example, as shown in FIG. May be omitted, and only the metal plates (connecting members) 92, 93, 94, 95 may be attached to the belt-like member 20 and the reinforcing member 60.

  Moreover, in each said embodiment, although this invention was applied to the strip | belt-shaped members 10 and 20 to which the reinforcement members 50 and 60 are attached to an outer peripheral side, it is not restricted to this, For example, as shown in FIG. The present invention may be applied to the band-like member 30 embedded in the.

  More specifically, as shown in FIG. 10A, a strip-shaped substrate 31, mating portions 32 and 33 that are formed on both side edges of the substrate 31, and three reinforcing ribs 34. The present invention can also be applied to the band-shaped member 30 in which the reinforcing members 40 are embedded in the three reinforcing ribs 34, respectively. In this case, as shown in FIG. 10 (b), an arc plate-shaped metal plate having a curvature that makes surface contact with the side surface of the reinforcing rib 34 (on the reinforcing rib 34 embedded with the reinforcing member 40). By attaching the connection member 96 with screws 8 or the like, the connection end portions of the band-shaped member 30 can be connected to each other.

  Further, in each of the above-described embodiments, the connection members 70 and 80 and the metal plates 90 and 91 are attached with the screws 8. However, the present invention is not limited thereto, and may be attached with, for example, rivets.

  Moreover, in each said embodiment, although the fitting protrusions 12 and 22 and the fitting groove parts 13 and 23 which mutually fit in the both-sides edge part of the strip | belt-shaped members 10 and 20 were provided, it is not restricted to this, For example, As shown in FIG. 11, a cross-section provided with a fitting groove 18 having the same shape on both side edges of the belt-like members 10, 20 and being formed in a long shape and straddling the adjacent belt-like members 10, 20. You may make it join these fitting groove parts 18 using the substantially U-shaped connector 19. FIG.

  Further, in each of the above embodiments, the rectangular space S is formed by attaching the reinforcing members 50 and 60 to the belt-like members 10 and 20, but the present invention is not limited thereto, and for example, a trapezoidal space S is formed. It may be formed.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, even when the belt-shaped member has a curvature, the belt-shaped members can be reliably connected to each other, so that the belt-shaped members curved at a predetermined curvature are connected in the longitudinal direction. It is extremely useful when applied to a connection structure.

1 Connection structure 2 Rehabilitation pipe 4 Existing pipe 8 Screw (fastening member)
DESCRIPTION OF SYMBOLS 10 Band-shaped member 20 Band-shaped member 30 Band-shaped member 40 Reinforcement member 50 Reinforcement member 51 Main reinforcement part (part which needs reinforcement)
60 Reinforcing member 70 Connecting member 80 Connecting member 90 Metal plate (connecting member)
91 Metal plate (connection member)
92 Metal plate (connection member)
93 Metal plate (connection member)
94 Metal plate (connection member)
95 Metal plate (connection member)
96 Metal plate (connection member)
S space

Claims (4)

With the connection structure of the band-shaped members that connect the band-shaped members curved with a predetermined curvature to each other in the longitudinal direction by forming the rehabilitated pipe in the existing pipe by connecting the side edges close to each other while being spirally wound. There,
The above band-shaped member, a reinforcing member which is bent such in and the integral with the respective strip-like member extending in the longitudinal direction of the respective strip-like members, are mounted, et al in the respective strip,
A connection member that connects the connection end portions is attached to a portion that needs reinforcement at the connection end portion of the band-shaped member including the reinforcement member,
The reinforcing member is attached to the outer peripheral side of the band-shaped member so that a space defined by the reinforcing member and the band-shaped member is formed,
A connection structure for a band-shaped member, wherein the connection member is inserted into the space and has a curvature that makes surface contact with a portion requiring the reinforcement. In the connection structure of the strip | belt-shaped member of Claim 1 ,
Upper Symbol reinforcement is required site, in the reinforcing member is a portion of the outermost peripheral side for partitioning the space,
The connecting member is in surface contact with the inner surface of the portion of the upper Symbol outermost peripheral side, and, of the belt-shaped member, characterized in that it has a geometry that a gap is formed between the belt-shaped member Connection structure. In the connection structure of the strip | belt-shaped member of Claim 1 or 2,
The space is formed such that the cross-sectional shape in the direction perpendicular to the longitudinal direction of the band-shaped member is rectangular or trapezoidal,
The connection structure of the strip-shaped member, wherein a cross-sectional shape of the connection member is a C-shape or a rectangular shape opening to the strip-shaped member side. In the connection structure of the strip | belt-shaped member as described in any one of Claims 1-3 ,
The connection structure of a strip-shaped member, wherein the connection member is attached to the reinforcing member via a fastening member.

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