JP2015034591A - Reinforcement method of resin pipe, reinforcement structure of resin pipe, and fiber reinforcement tape used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement method for a resin pipe and the like, capable of easily wrapping reinforcement tape around the pipe at a predetermined wrapping length.SOLUTION: A strip of fiber reinforcement tape 9 includes, on at least one surface thereof, marks 11a and 11b along the longitudinal direction of the tape. The marks 11a and 11b may be formed, for example, by weaving colored strings into the tape. When spirally wrapping the fiber reinforcement tape 9 around the outer periphery of a pipe body 3, first, a width end of the fiber reinforcement tape 9 on the outer peripheral side is aligned with the mark 11a of the fiber reinforcement tape 9 on the inner peripheral side. In this state, the fiber reinforcement tape 9 is wrapped around the pipe at constant tension while aligning the width end of the fiber reinforcement tape 9 on the outer peripheral side with the mark 11a of the fiber reinforcement tape 9 on the inner peripheral side. By this, the fiber reinforcement tape 9 can be wrapped around the pipe with a wrapping width of a half of the tape width.

Description

  The present invention relates to a branched structure of resin piping used for fire extinguishing piping such as tunnels and factory piping, for example.

  Conventionally, metal pipes such as ductile cast iron pipes have been used for water supply pipes such as fire extinguishing pipes used for fire extinguishing. Such a metal tube has sufficient internal pressure resistance (for example, Patent Documents 1 and 2).

JP 2001-571 A JP 2008-55024 A

  Such a water supply pipe is installed by connecting a metal pipe having a predetermined length. However, the metal pipe is heavy, and the work of installing the water supply pipe requires many man-hours for the connection and requires cost and work time.

  On the other hand, there is a method in which the water supply pipe is made of a resin that is light and long. By using the water supply piping made of resin, it is possible to greatly reduce the length of the connection points in the longitudinal direction, so that the connection work is reduced, and members such as joints can be reduced. Moreover, since it is lightweight, it is excellent in handleability, and even when a force is applied to the water supply pipe due to a ground change after installation, it can be absorbed by the deformability of the pipe itself within a certain range.

  However, since the resin water supply pipe does not have the internal pressure resistance characteristics as the metal pipe, the water supply pipe may be broken by the internal pressure. For this reason, a fiber reinforcement tape is spirally wound around the outer periphery of the resin water supply pipe to form a reinforcing layer for enhancing the internal pressure resistance. Such a fiber reinforced tape can be wound at an equal pitch in a factory, for example.

  However, depending on the construction situation, an operator may wrap a fiber reinforced tape spirally around the outer periphery of the resin pipe at the construction site. Wrapping is to wind one part over another. In this case, the operator needs to perform the winding operation of the fiber reinforced tape so that the predetermined wrap length is visually observed.

  However, it is difficult to wind the fiber reinforced tape with a certain wrap length at the site of execution, and the wrap length may vary. When the wrap length is shortened, there is a portion where the fiber reinforced tape is not sufficiently laminated, so that sufficient internal pressure resistance characteristics may not be obtained. If the winding pitch is not constant, the winding tension of the fiber reinforced tape may also vary. If the winding tension varies as described above, sufficient internal pressure resistance characteristics may not be obtained. Insufficient internal pressure resistance is particularly problematic in the case of high pressure piping.

  Moreover, since the usage-amount of a fiber reinforcement tape will increase if a fiber reinforcement tape is wrapped too much, a cost increase and an operation man-hour will increase. In addition, since the fiber reinforced tape is excessively laminated, the outer diameter of the pipe is increased.

  This invention is made | formed in view of such a problem, and it aims at providing the reinforcement method etc. of resin piping which can wind a fiber reinforcement tape easily by predetermined wrap length.

  In order to achieve the above-mentioned object, the first invention is a method for reinforcing a resin pipe, wherein a fiber reinforcing tape having marks provided in a longitudinal direction at predetermined positions in the width direction is used, and the fibers on the inner peripheral side are used. A method of reinforcing a resin pipe, wherein the fiber reinforcing tape is wrapped around the outer periphery of the resin pipe by wrapping the mark on the reinforcing tape so that an end portion in the width direction of the fiber reinforcing tape on the outer peripheral side is along. It is.

  In this way, the operator easily secures a predetermined wrap length by wrapping and wrapping the mark on the inner peripheral side fiber reinforcing tape so that the widthwise end of the outer peripheral side fiber reinforcing tape follows. be able to. For this reason, the dispersion | variation in wrap length and the dispersion | variation in the winding tension | tensile_strength of the fiber reinforcement tape accompanying this can be suppressed. Here, if an adhesive layer is provided on one side of the fiber reinforced tape, the tape can be wound while adhering with the adhesive layer at the time of winding, so that the tape can be wound efficiently because it does not loosen. Thus, after winding, the edge part of a tape can be fixed with a metal band (sheet-like fixing member), for example. If the metal band is fixed with bolts in this way, the wound tape will not loosen.

  The mark is provided at least at a position of 1/3 in the width direction of the fiber reinforced tape, and the fiber reinforced tape on the outer peripheral side of the fiber reinforced tape on the inner peripheral side is set to the width of the fiber reinforced tape. You may wind so that the said fiber reinforced tape may become 3 layers by winding so that 2/3 may wrap. Thus, the dispersion | variation in the winding tension when it winds in triple with predetermined intensity | strength can be suppressed.

  By doing in this way, a fiber reinforcement tape can be easily wound so that a fiber reinforcement tape may become a triple structure over the whole outer periphery of resin piping.

  The mark is provided at least at a position that is 1/2 of the width direction of the fiber reinforced tape, and the fiber reinforced tape on the outer peripheral side of the fiber reinforced tape on the inner peripheral side is connected to the width of the fiber reinforced tape. You may wind so that the said fiber reinforcement tape may become double by winding so that 1/2 may wrap. Thus, the dispersion | variation in the winding tension at the time of winding twice with predetermined intensity | strength can be suppressed.

By doing in this way, a fiber reinforcement tape can be easily wound so that a fiber reinforcement tape may become a double structure over the whole outer periphery of resin piping.
Moreover, although the example of the position of the said mark of the position of 1/3 of the width direction of the said fiber reinforcement tape and the position of 1/2 was shown, it does not restrict to this, For example, 1/4 may be sufficient.

  The resin pipe is a resin-made branch pipe formed by joining the branch part at a predetermined angle to at least a part of the pipe part, and is a plate-like member having a hole through which the branch part can be inserted. A reinforcing member in which a bulging portion corresponding to the outer surface shape of the joint portion between the branch portion and the pipe portion is formed in advance at the opposite edge portion of the hole, and the branch portion is inserted into the hole, The reinforcing member is wound around the outer periphery of the tube portion, the bulging portion is brought into close contact with the outer surface of the lower end portion of the branch portion, and the shape corresponding to the outer surface shape in the vicinity of the joint portion between the tube portion and the branch portion. The reinforcing member that covers the entire outer surface of the joint portion along the outer periphery may be provided, and the fiber reinforcing tape may be wound around the outer periphery of the reinforcing member.

  Here, the vicinity of the junction between the pipe part and the branch part is the outer surface shape of the branch pipe body in the region where the branch part is extended with respect to the pipe part in the front surface of the branch pipe, And the outer shape of the lower end of the tube part are three-dimensionally continuous.

  Usually, a branch pipe is formed by joining a pipe part and a branch part in a T-shape. In this case, it is difficult to wind a fiber reinforced tape near the joint part between the pipe part and the branch part. It is. However, according to the above configuration, since a reinforcing member having a shape corresponding to the outer shape of the part is separately used for a part where it is difficult to wind the conventional fiber reinforced tape, the reinforcing layer is formed over the entire circumference of the branch pipe body. Can be formed. For this reason, damage etc. of a branch pipe can be prevented.

  Moreover, a reinforcement member can be hold | maintained and fixed to the outer surface of a branch pipe body by winding a fiber reinforcement tape around the outer periphery of a reinforcement member. For this reason, the holding member for hold | maintaining a reinforcement member separately is unnecessary.

  The fiber reinforced tape may include an adhesive layer on at least one surface.

  Alternatively, an adhesive may be applied to the resin pipe or a double-sided tape may be wound to form an adhesive layer, and the fiber reinforced tape may be spirally wound from above.

  The second invention is a reinforcing structure for resin piping, comprising a resin piping and a fiber reinforced tape having a mark provided in a longitudinal direction at a predetermined position in the width direction, on the outer periphery of the resin piping, It is a reinforcing structure of a resin pipe, wherein the fiber reinforcing tape is spirally wound by wrapping the fiber reinforcing tape so that the end in the width direction is along the mark. By winding in this way, it is possible to obtain a reinforcing structure in which the reinforcing tape is shifted by a predetermined pitch and uniformly wound with a predetermined wrap length. Thus, after winding, the edge part of a tape can be fixed with a metal band (sheet-like fixing member), for example. If the metal fixing member is bolted and fixed in this manner, the wound tape will not loosen.

  According to the second invention, since the fiber reinforced tape is wound with a substantially uniform wrap length, a piping structure having excellent internal pressure resistance can be obtained.

  The third invention is a fiber reinforced tape for reinforcing resin pipes, and marks are formed by weaving yarns of different colors in the longitudinal direction at 1/2 position and 1/3 position in the width direction. The fiber reinforced tape is characterized by having an adhesive layer on one surface.

  According to the third invention, it is possible to obtain a fiber reinforced tape that allows an operator to perform a winding operation with a substantially uniform wrap length. Moreover, the structure which wound the tape uniformly can be obtained using this.

  ADVANTAGE OF THE INVENTION According to this invention, the reinforcement method of resin piping etc. which can wind a fiber reinforcement tape easily by predetermined | prescribed wrap length can be provided.

It is a figure which shows the piping 1, (a) is a perspective view, (b) is sectional drawing. It is the longitudinal direction fragmentary sectional view of the piping 1 (the AA line sectional view of FIG.1 (b)), (a) is a figure which shows the state which wound the fiber reinforcement tape 9 1/2 wrap, (b) is a fiber The figure which shows the state which wound the reinforcing tape 9 2/3 wrap. It is a figure which shows the fiber reinforcement tape 9, (a) is a perspective view, (b) is a top view. It is a figure which shows the winding process of the fiber reinforcement tape 9, (a) is a figure which shows the state which wound the fiber reinforcement tape 9 by 1/2 wrap, (b) is the state which wound the fiber reinforcement tape 9 by 2/3 wrap. FIG. The figure which shows a branch pipe body. The perspective view which shows the reinforcement member 15. FIG. It is a figure which shows the reinforcement member 15, (a) is a top view, (b) is the BB sectional drawing of (a). (A), (b) is a figure which shows the process of attaching the reinforcement member 15 to the branch pipe body 13. FIG. It is a figure which shows the state in which the reinforcement member 15 was attached to the branch pipe body 13, (a) is a front view, (b) is the EE sectional view taken on the line (a), (c) is F of (a). -F sectional view. (A) is a front view which shows the state which wound the fiber reinforcement tape 9 around the outer periphery of the reinforcement member 15, (b) is a front view which shows the state which attached the reinforcement member 15 to the outer periphery of the fiber reinforcement tape 9. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A and 1B are diagrams showing a pipe 1, in which FIG. 1A is a perspective view and FIG. 1B is a cross-sectional view. The pipe 1 is mainly composed of a pipe body 3, a reinforcing layer 5, a protective layer 7, and the like.

  The tubular body 3 is a resin tubular body, for example, a polyethylene tubular body. A reinforcing layer 5 is formed on the outer peripheral side of the tube body 3. In addition, the outer peripheral side of the tube body 3 means the outside of the tube body 3 and includes having another layer structure between the tube body 3 and the reinforcing layer 5. In the following description, in the positional relationship of each layer, it is simply referred to as “periphery”, but it is needless to say that similarly, those having other layer structures between the respective layers are included.

  The reinforcing layer 5 is formed of a fiber reinforced tape. FIG. 2A is a cross-sectional view taken along line AA in FIG. The reinforcing layer 5 is formed by the fiber reinforcing tape 9 being spirally wrapped around the outer periphery of the tube body 3. In the example shown in FIG. 2A, the inner and outer fiber reinforcing tapes 9 are spirally wound so as to wrap around 1/2 the width of the fiber reinforcing tape 9. By doing in this way, the fiber reinforced tape 9 is wound twice substantially on the whole outer peripheral surface of the tubular body 3.

  Moreover, as shown in FIG.2 (b), you may spirally wind so that 2/3 of the width | variety of the fiber reinforcement tape 9 may wrap. In this case, the fiber reinforcing tape 9 is wound around the entire outer peripheral surface of the tube body 3 in a triple manner.

  In this way, the number of laminated fiber reinforcing tapes 9 is adjusted by the wrap length of the fiber reinforcing tape 9 (the length in the width direction in which the inner fiber reinforcing tape 9 and the outer fiber reinforcing tape 9 overlap). Can do. For example, for low pressure use (with an internal pressure of less than 1 MPa), the fiber reinforced tape 9 may not be completely doubled (for example, it is not wrap winding but butt winding with butted ends of the width, etc.). In the case of use (for example, the internal pressure is 1 MPa to 2 MPa), it is necessary to wind the fiber reinforced tape 9 in a double or triple manner. Details of the fiber reinforced tape 9 will be described later.

  The protective layer 7 is made of resin, and for example, flame retardant polyolefin is used. The protective layer 7 is used for preventing external damage during the laying operation of the pipe 1. Further, when the pipe 1 is an exposed pipe, the pipe 1 is required to have weather resistance. For this reason, the protective layer 7 may contain 1% or more of carbon black.

  As such a reinforcing pipe, for example, a reinforcing tape having a thickness of 0.2 mm and a width of 50 mm is wound around the outer periphery of the tubular body 3 having an outer diameter of 90 mm with a wrap length of 25 mm, and a protective layer having a thickness of 2 mm is further wound around the outer periphery. May be formed.

  Next, the fiber reinforced tape 9 will be described. 3A and 3B are diagrams showing the fiber reinforced tape 9, FIG. 3A is a perspective view, and FIG. 3B is a plan view. The fiber reinforced tape 9 is a tape made of polyarylate fiber or aramid fiber, for example. For example, a tape using Vectran (registered trademark) manufactured by Kuraray, which is a super fiber, can be used.

  On at least one surface of the fiber reinforced tape 9, marks 11a and 11b are formed in the longitudinal direction. The marks 11a and 11b can be formed, for example, by folding colored threads. The marks 11a and 11b are preferably formed in different colors. In the illustrated example, the mark 11a is formed at a position (X in the figure) that is ½ of the width W of the fiber reinforced tape 9. Further, the mark 11b is formed at a position (Y in the drawing) of the width W of the fiber reinforcement tape 9 from the end of the fiber reinforcement tape 9.

  The positions and the number of arrangement of the marks 11a and 11b are not limited to the illustrated example. For example, only one of the marks 11a and 11b may be used, and the mark 11b may be only one place. Further, the mark may be colored instead of being formed by the colored thread. Moreover, you may color-code the whole surface of the fiber reinforcement tape 9 with a thread | yarn or coloring.

  Next, a method for winding the fiber reinforced tape 9 will be described. FIG. 4A corresponds to FIG. 2A and shows a method of winding the fiber reinforcement tape 9 around the outer periphery of the tubular body 3 so that the wrap length is ½ of the width of the fiber reinforcement tape 9. FIG.

  When the fiber reinforcing tape 9 is spirally wound around the outer periphery of the tubular body 3, first, the widthwise end of the outer peripheral fiber reinforcing tape 9 is aligned with the mark 11 a of the inner peripheral fiber reinforcing tape 9. In this state, the fiber reinforcing tape 9 is wound with a constant tension so that the end in the width direction of the fiber reinforcing tape 9 on the outer peripheral side is along the mark 11a of the fiber reinforcing tape 9 on the inner peripheral side. By doing in this way, it can wind so that a wrap length may become just 1/2 of the width | variety of the fiber reinforcement tape 9. FIG. That is, the fiber reinforcement tape 9 can be wound around the outer periphery of the tubular body 3 so as to be substantially double.

  Similarly, FIG. 4B corresponds to FIG. 2B, and the fiber reinforcement tape 9 is wound around the outer periphery of the tube body 3 so that the wrap length is 2/3 of the width of the fiber reinforcement tape 9. It is a figure which shows a method.

  In this case, when the fiber reinforcement tape 9 is spirally wound around the outer periphery of the tube 3, first, the end in the width direction of the fiber reinforcement tape 9 on the outer periphery side is marked with the mark 11 b ( Align with the mark 11b) on the opposite side to the winding direction. In this state, the fiber reinforcement tape 9 is wound with a constant tension so that the widthwise end of the fiber reinforcement tape 9 on the outer circumference side is along the mark 11b of the fiber reinforcement tape 9 on the inner circumference side. By doing in this way, it can wind so that a wrap length may become just 2/3 of the width | variety of the fiber reinforcement tape 9. FIG. That is, the fiber reinforced tape 9 can be wound around the outer periphery of the tubular body 3 so as to be substantially triple.

  An adhesive layer (such as an adhesive) may be formed on one surface of the fiber reinforced tape 9. In this case, the marks 11a and 11b may be formed on the surface opposite to the adhesive layer.

  According to this embodiment, the fiber reinforced tape 9 can be spirally wound around the outer periphery of the tubular body 3 so as to have a substantially constant wrap length (pitch). For this reason, the dispersion | variation in wrap length is suppressed and the deterioration of the internal pressure-proof characteristic by this and excessive winding of the fiber reinforcement tape 9 can be suppressed. Moreover, since the winding position of the fiber reinforced tape 9 can be easily recognized, the operation is easy, and the winding operation can be performed while maintaining a constant tension.

  That is, by keeping the wrap length constant with respect to the predetermined outer diameter of the tube 3 and the width of the fiber reinforcement tape 9, the winding angle of the fiber reinforcement tape 9 around the tube 3 can be kept constant. For this reason, compared with the case where it winds performing angle adjustment, it becomes easy to wind always making the tension | tensile_strength with respect to the longitudinal direction of the fiber reinforcement tape 9 constant.

  Further, it is possible to easily visually recognize how many wrap lengths are wound by visual inspection. For example, when one line of the mark 11b is exposed and the other line of the mark 11b is wrapped and cannot be seen, it is easy to wrap the wrap length at ½ the width. It can be visually recognized.

  Further, since the fiber reinforced tape 9 is provided with the marks 11a and 11b, the present invention can be applied to the case where the wrap length is ½ of the width of the fiber reinforced tape 9 or 2/3. Further, by providing a pair of marks 11b, the wrap length can be wound at 2/3 regardless of the direction of winding. In the present invention, if there is at least one mark, spiral winding can be easily performed with a wrap length corresponding to the position. For this reason, the number of marks may be one, or three or more types of marks may be formed.

  Next, another embodiment will be described. The present invention can be applied not only to the straight pipe as described above but also to a branch pipe or an elbow pipe. Hereinafter, an example in which the present invention is applied to the branch pipe body 13 as shown in FIG. 5 will be described.

  The branch pipe body 13 is made of, for example, polyethylene. The branch pipe 13 has a pipe portion 13a and a branch portion 13b joined in a substantially T shape. A region where the outer shape of the branch portion 13b and the outer shape of the tube portion 13a are three-dimensionally continuous is formed in a region where the branch portion 13b extends and overlaps the tube portion 13a. As described above, it is difficult to spirally wind the fiber reinforcing tape 9 in this region without a gap over the entire circumference. That is, when the fiber reinforcement tape 9 is wound around the branch pipe body 13, a portion where the fiber reinforcement tape 9 is not wound is generated.

  Therefore, in this embodiment, a reinforcing member 15 as shown in FIG. 6 is used. 7A is a plan view of the reinforcing member 15, and FIG. 7B is a cross-sectional view taken along line BB in FIG. 7A.

  The material of the reinforcing member 15 is excellent in heat resistance, for example, as long as it maintains the internal pressure resistance of the branch pipe body 13 even in a high temperature environment, and is made of a metal or a fiber similar to a fiber reinforced tape. The reinforcing member 15 has a length that can be wound over the entire circumference of the pipe portion 13a of the branch pipe body 13 (the lateral direction in FIG. 7A is the longitudinal direction). A hole 17 is formed in the approximate center of the reinforcing member 15. The hole 17 can be inserted into the branch portion 13b of the branch pipe, and has a shape corresponding to the outer diameter of the branch portion 13b in a state where the reinforcing member 15 is rolled and wound around the outer periphery of the branch pipe 13.

  A bulging portion 19 is formed at each edge portion facing the longitudinal direction of the hole 17. The bulging portion 19 is a portion that swells in one surface direction of the reinforcing member 15. In addition, the hole 17 and the bulging part 19 are collectively formed, for example with a press.

  The shape of the bulging part 19 is a shape according to the outer surface shape of the branch pipe body 13 in the vicinity of the joint part between the pipe part 13a and the branch part 13b. That is, in a state where the reinforcing member 15 is rolled up and wound around the outer periphery of the branch pipe 13 (pipe portion 13a), the outer surface shape in the vicinity of the joint portion between the pipe portion 13a and the branch portion 13b (in the front of the branch pipe body 13, The shape of the outer surface of the branch pipe body 13 in the overlapping region by extending the branch portion 13b with respect to the portion 13a, in which the outer shape of the branch portion 13b and the outer shape of the lower end portion of the pipe portion 13a are three-dimensionally continuous) And substantially the same shape.

  FIG. 8 is a diagram illustrating a process of attaching the reinforcing member 15 to the branch pipe body 13. As shown in FIG. 8A, with the bulging portion 19 of the reinforcing member 15 on the upper surface side, the branch portion 13b is inserted into the hole 17 of the reinforcing member 15 (in the direction of arrow C in the figure). At this time, the branch portion 13 b is inserted into the hole 17 while bending the vicinity of the hole 17 of the reinforcing member 15 so as to correspond to the outer surface of the tube portion 13 a of the branch tube 13. After the reinforcing member 15 is inserted to the base of the branching portion 13b, the longitudinal direction of the reinforcing member 15 is wound around the outer surface of the pipe portion 13a as shown in FIG.

  FIG. 9 is a view showing a state in which the reinforcing member 15 is attached to the branch pipe body 13, FIG. 9 (a) is a front view, and FIG. 9 (b) is a cross-sectional view taken along line EE of FIG. 9 (a). FIG. 9C is a cross-sectional view taken along the line FF of FIG. A wrap portion may be formed between the ends of the reinforcing member 15.

  As shown in FIG. 9, the bulging part 19 is a lower end part of the branch part 13b, and has substantially the same shape as the outer surface in the vicinity of the joint part between the pipe part 13a and the branch part 13b. For this reason, the inner surface of the bulging portion 19 is in close contact with the outer peripheral surface of the lower end portion of the branching portion 13 b, and the portion can be completely covered with the reinforcing member 15. Further, a portion other than the bulging portion 19 can be brought into close contact with the outer peripheral surface of the tube portion 13 a, and the portion can be completely covered with the reinforcing member 15. Therefore, the reinforcing member 15 can cover the entire outer periphery in the vicinity of the connecting portion between the branch portion 13b and the tube portion 13a.

  From this state, as shown in FIG. 10A, the fiber reinforcing tape 9 is spirally wound around the outer peripheral surface of the branch tube 13 (reinforcing member 15). At this time, as described above, the fiber reinforced tape 9 is spirally wound at a predetermined pitch (wrap length). Furthermore, when the branch part 13b of the branch pipe body 13 branches from the pipe part 13a at a substantially right angle, the marks 11a and 11b of the fiber reinforced tape 9 are used and the branch part 13b is sandwiched and wound with a predetermined pitch. Thus, it can be wound almost symmetrically into a V-shape or an 8-shape. Wrapping in the shape of figure 8 means winding around a rack. For example, as shown in FIG. 10 (a), the right and left sides of the pipe portion 13a sandwiching the branch portion 13b are symmetrically arranged. Wrapping across the tape of a book. At this time, when the double-sided tape is wound around the outer periphery of the tube of the branch portion 13b or the adhesive is applied, the fiber reinforcing tape 9 is easily wound. In addition, although the site | part where it is difficult to wind the fiber reinforcement tape 9 arises in the junction part vicinity of the branch part 13b and the pipe part 13a of the branch pipe body 13, the reinforcement member 15 is provided in this site | part. Therefore, at least one of the fiber reinforced tape 9 or the reinforcing member 15 is provided on the outer peripheral surface of the branch pipe 13, and the resin portion of the branch pipe 13 is not exposed to the outer surface.

  In addition, the reinforcing member 15 wound around the outer peripheral surface of the tube portion 13 a can be held by the fiber reinforcing tape 9. Therefore, the reinforcing member 15 does not fall off, and a gap is not generated between the inner surface of the reinforcing member 15 and the outer surface of the branch pipe body 13.

  Note that the reinforcing member 15 may be formed on the outer peripheral surface of the fiber reinforced tape 9 as shown in FIG. In this case, first, the reinforcing member 15 is provided so that the fiber reinforcing tape 9 is wound around the outer peripheral surface of the branch pipe 13 and the pipe exposed portion formed in the vicinity of the connecting portion between the branch 13b and the pipe 13a is covered. That's fine.

  However, in this case, since the reinforcing member 15 is not held by the fiber reinforcing tape 9, it is necessary to hold the reinforcing member 15 by a holding member such as a band 21 in a state where the reinforcing member 15 is provided on the branch pipe body 13. is there. The band 21 is a metal band such as stainless steel. That is, a holding member is provided on the outer peripheral surface of the reinforcing member 15, and the reinforcing member 15 may be held by the holding member so that the reinforcing member 15 does not fall off from the branch pipe body 13 or a gap is generated. Further, the reinforcing member 15 may be held with an adhesive or the like instead of the holding member.

  As described above, according to the present embodiment, the reinforcing member 15 is used in a region where it is difficult to uniformly wind the fiber reinforcing tape 9 with a predetermined wrap length. Therefore, a reinforcing layer is formed on the outer periphery of the branch pipe body 13 by the fiber reinforcing tape 9 and the reinforcing member 15. For this reason, a reinforcement layer can be formed easily. In addition, a reinforcing layer is formed on either the reinforcing member 15 or the fiber reinforcing tape 9 on the entire outer periphery of the branch pipe body 13. For this reason, the internal pressure resistance characteristic of the branch pipe 13 can be ensured.

  In particular, since the bulging portion 19 corresponding to the outer surface shape of the branch pipe body 13 is formed in the reinforcing member 15 in advance, the reinforcing member 15 can be reliably brought into close contact with the outer surface of the branch pipe body 13.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ......... Pipe 3 ......... Pipe 5 ......... Reinforcement layer 7 ......... Protective layer 9 ......... Fiber reinforcement tape 11a, 11b ......... Mark 13 ......... Branch tube 13a ......... Pipe part 13b ......... Branch 15 ......... Reinforcing member 17 ......... Hole 19 ......... Bulge 21 ......... Band

Claims (8)

A method for reinforcing resin piping,
Using a fiber reinforced tape having a mark provided over the longitudinal direction at a predetermined position in the width direction,
The fiber reinforcing tape is wrapped around the outer periphery of the resin pipe, wrapped around the mark of the fiber reinforcing tape on the inner peripheral side so that the end in the width direction of the fiber reinforcing tape on the outer peripheral side is along. To reinforce resin piping.   The mark is provided at least at a position of 1/3 in the width direction of the fiber reinforced tape, and the fiber reinforced tape on the outer peripheral side of the fiber reinforced tape on the inner peripheral side is set to the width of the fiber reinforced tape. 2. The method for reinforcing a resin pipe according to claim 1, wherein the fiber reinforcing tape is wound in a three-fold manner by winding so that 2/3 wraps.   The mark is provided at least at a position that is 1/2 of the width direction of the fiber reinforced tape, and the fiber reinforced tape on the outer peripheral side of the fiber reinforced tape on the inner peripheral side is connected to the width of the fiber reinforced tape. 2. The method for reinforcing a resin pipe according to claim 1, wherein the fiber reinforcing tape is wound so that the fiber reinforcing tape is doubled by being wound so that 1/2 is wrapped. The resin pipe is a branch pipe made of resin configured by joining a branch part at a predetermined angle to at least a part of the pipe part,
The plate-shaped member is formed with a hole through which the branch portion can be inserted, and a bulging portion corresponding to the outer surface shape of the joint portion between the branch portion and the tube portion is formed in advance on the opposite edge portion of the hole. Using the formed reinforcing member,
The branch portion is inserted through the hole, the reinforcing member is wound around the outer periphery of the pipe portion, and the bulging portion is closely attached to the outer surface of the lower end portion of the branch portion,
The reinforcing member that covers the entire outer surface of the joint in the vicinity of the joint is provided along a shape corresponding to the shape of the outer surface in the vicinity of the joint between the pipe and the branch. The method for reinforcing a resin pipe according to any one of claims 1 to 3, characterized in that:   The method for reinforcing a resin pipe according to any one of claims 1 to 4, wherein the fiber reinforced tape includes an adhesive layer on at least one surface. Apply adhesive to resin piping or wrap double-sided tape to form an adhesive layer,
5. The method for reinforcing a resin pipe according to claim 1, wherein the fiber reinforcing tape is spirally wound from above. A resin pipe reinforcement structure,
A fiber reinforced tape having a mark provided in a longitudinal direction at a predetermined position in the resin pipe and the width direction;
Comprising
A reinforcing structure of a resin pipe, wherein the fiber reinforcing tape is spirally wound around an outer periphery of the resin pipe so that an end portion in the width direction of the fiber reinforcing tape follows the mark. A fiber reinforced tape for resin piping,
A fiber reinforced tape comprising a mark provided in a longitudinal direction at a predetermined position in the width direction.

Images