JP5688329B2 - Construction method using a jig for constructing a band-shaped member bundle - Google Patents

Description

  The present invention relates to a construction method using a construction jig for a band-shaped member bundle.

  In an existing pipe that has deteriorated, a strip-shaped member is wound in a spiral shape to form a rehabilitation pipe, and the inner peripheral surface of the existing pipe is lined with the regenerated pipe that has been piped. In such an existing pipe lining method, it is necessary to transport a long band member to the construction site in order to continuously feed the band member into the existing pipe.

  Conventionally, a belt-like member for producing a rehabilitation pipe has been wound around a transport drum and transported to the site. However, a large number of transport drums must be prepared for the construction of the rehabilitation pipe. For this reason, the applicant must store and transport a hollow cylindrical belt-shaped member formed by winding the belt-shaped member into a hollow cylindrical shape without using a transport drum while reliably preventing the belt-shaped member from being unwound. In addition to proposing a band-shaped member bundle that can be formed, a construction jig is proposed at the construction site to release the band-shaped member bundle and pull the band-shaped member from the inner peripheral side of the hollow cylindrical band-shaped member and supply it to the existing pipe (For example, refer to Patent Document 1).

JP 2009-107723 A

  By the way, in order to manufacture the above-described band-shaped member bundle, it is necessary to form a hollow cylindrical band-shaped member by sequentially winding an extruded linear band-shaped member on a winding drum or the like while elastically deforming in an arc shape. As a result, manufacturing errors occur in the outer diameter. On the other hand, when the band-shaped member bundle is accommodated in the construction jig and a plurality of connecting members are arranged at intervals in the circumferential direction along the outer peripheral surface thereof, the band-shaped member bundle is supported when the band-shaped member bundle is supported. It is difficult to make the rotation center of the jig coincide with the center of the band-shaped member bundle. Further, in order to accommodate the band-shaped member bundle in the construction jig, a certain gap is required between the outer peripheral surface of the band-shaped member bundle and the connecting material. Even if the connecting material is pressed and connected along the outer peripheral surface of the band-shaped member bundle, the connecting material is located on the same circumference around the rotation center of the construction jig. Not exclusively.

  In such a state, when the binding of the band-shaped member bundle is released, the construction jig is rotated, and the drawing of the band-shaped member from the inner peripheral side of the hollow cylindrical band-shaped member is started, the center of the hollow cylindrical band-shaped member is When the center of rotation of the construction jig is separated from the center of rotation of the hollow cylindrical strip member, the construction jig cannot be rotated smoothly, or the rotation of the construction jig is accelerated. It becomes. Here, since the weight of the hollow cylindrical belt-shaped member formed by winding the belt-shaped member from 500 to 2000 m is 100 to 1000 kg, the construction jig containing the hollow cylindrical belt-shaped member is temporarily accelerated. If you deviate from the turntable, an unintended situation may occur. In addition, if there is a gap between the outer peripheral surface of the hollow cylindrical belt-shaped member and the connecting material, a so-called rampage phenomenon occurs in which the hollow cylindrical belt-shaped member rolls in the construction jig, and the belt-shaped member There is a possibility that the restoring force acts so as to eliminate the elastic deformation and the belt member is pulled in to affect an operator who is engaged in the work of pulling out the belt member.

  The present invention has been made in view of such problems, and the construction jig can be stabilized by accommodating the hollow cylindrical belt-like members in the construction jig so that their centers of rotation coincide with each other. It is possible to provide a construction method using a construction tool for a strip-shaped member bundle that can be rotated and can be reliably pulled out from the inner peripheral side of the hollow cylindrical strip-shaped member.

The present invention was wound at intervals strips hollow cylindrical shape and is elastically deformed left and right side surfaces of the hollow cylindrical belt member wound up sequentially, the inner and outer peripheral surfaces in the circumferential direction of the long Left and right side frames in which a plurality of reinforcing bars are radially connected between the outer peripheral ring and the inner peripheral ring at intervals in the circumferential direction, and the left and right side frames in accommodating the construction jig comprising a coupling member plurality of the opposing reinforcing桟間Ru coupled circumferentially apart, the connecting member, on the basis of the outer diameter of the belt-shaped member bundling body, the Connected so as to be located on the same circumference with an inner diameter of 102 to 143% with respect to the outer diameter, and the left and right side frames of the construction jig and a space formed by a plurality of connecting members in the left-right direction After the tape is housed, the band-shaped member bundle is released and elasticized. The shape is loosened in the unwinding direction by the restoring force of the shape, and the outer diameter of the hollow cylindrical belt-shaped member is expanded and its outer peripheral surface is pressed against a plurality of connecting members, and then the construction jig is rotated to form a hollow cylindrical shape. The belt-like member is drawn out from the inner peripheral side of the belt-like member through the inner peripheral ring.

  According to the present invention, in a factory, a long cylindrical member is wound in order while being elastically deformed into a hollow cylindrical shape by using a winding device or the like to form a hollow cylindrical belt-shaped member, and a gap is provided in the circumferential direction. A plurality of binding materials are wound around the left and right side surfaces, the inner peripheral surface and the outer peripheral surface, and are bound to produce a band-shaped member binding body, which is transported to a construction site. On the other hand, the construction jig is assembled by the left and right side frames and a plurality of connecting members at the construction site. Specifically, a plurality of connecting members are connected between the reinforcing bars facing each other on the left and right side frames, and, for example, a construction jig having an upper half opened is assembled. In this case, each connecting member is set on the same circumference with an inner diameter larger than the outer diameter of the band-shaped member bundle, which is set based on the outer diameter of the band-shaped member bundle, with the rotation center of the construction jig as the center. Connect to position. Next, the band-shaped member bundle is suspended, or the construction jig is rolled to accommodate the band-shaped member bundle in the space defined by the left and right side frames and the plurality of connecting members. In the supported state, the remaining connecting members are connected so as to be positioned on the same circumference of the inner diameter set based on the outer diameter of the band-shaped member bundle, similarly to the connecting member previously connected.

  After that, if the binding of the band-shaped member bundle with the binding material is released, a restoring force that cancels elastic deformation acts on the band-shaped member so that the wound spiral spring returns, and the band-shaped member is wound in the winding direction. The outer diameter of the hollow cylindrical belt-shaped member is expanded and the outer peripheral surface thereof is located on the same circumference and reduced to a plurality of connecting members that are moved in the circumferential direction so as to be pulled in the opposite direction. Push by restoring force. That is, the hollow cylindrical belt-like member is pressed by a restoring force of the belt-like member on a plurality of connecting members that are connected on the circumference with the same inner diameter around the rotation center of the construction jig. Supported. Thereby, the center of the hollow cylindrical belt-shaped member having an expanded outer diameter is located on the rotation center of the construction jig.

  As a result, it is possible to stably rotate the construction jig containing the hollow cylindrical belt-shaped member without causing an unexpected situation due to a mismatch between the center of the hollow cylindrical belt-shaped member and the rotation center of the construction jig. it can. Further, the belt-like member can be reliably pulled out from the inner peripheral side of the hollow cylindrical belt-like member that rotates together with the construction jig and guided to the existing pipe.

  Here, the inner diameter for connecting the connecting member to the reinforcing bar is preferably about 102 to 143% with respect to the outer diameter of the band-shaped member bundle. If the inner diameter of the connecting member is smaller than 102% of the outer diameter of the band-shaped member bundle, the band-shaped member bundle may not be accommodated in the construction jig due to looseness or expansion during transportation or storage. On the other hand, if the inner diameter of the connecting member is larger than 143% of the outer diameter of the band-shaped member bundle, depending on the type of the band-shaped member, the outer peripheral surface of the expanded hollow cylindrical band-shaped member may be released when the band-shaped member bundle is released. May not be pressed against the connecting material.

  In the present invention, it is preferable that a plurality of mounting holes are formed in the reinforcing bars of each side frame at a set interval in the radial direction, and a connecting material can be connected to the selected mounting hole. As a result, even if the outer diameter of the band-shaped member bundle is changed, a corresponding mounting hole is selected from a plurality of mounting holes, and the set inner diameter is set on the same circumference around the rotation center of the construction jig. The connecting material can be connected at the position.

  According to the present invention, it is possible to stably rotate the construction jig by accommodating the hollow cylindrical belt-like member in the construction jig so that the center of rotation coincides with the center thereof, and the hollow cylindrical shape. The belt-like member can be reliably pulled out from the inner peripheral side of the belt-like member.

It is a perspective view which shows an example of the strip | belt-shaped member binding body used for the construction method of this invention. It is the top view and front view which show an example of the construction jig | tool of a strip | belt-shaped member binding body with the hollow cylindrical strip | belt-shaped member which canceled the binding of the strip | belt-shaped member binding body. It is process drawing explaining the process of assembling and constructing the construction jig. It is process drawing explaining the process which assembles and constructs the construction jig following FIG. It is process drawing explaining the process which assembles and constructs the construction jig following FIG. It is process drawing explaining the other point which accommodates a strip | belt-shaped member binding body in the jig | tool for construction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Prior to explaining the construction method of the present invention, the band-shaped member bundle 1 and the construction jig 10 will be explained.

  Although not shown in detail, the band-shaped member bundle 1 is manufactured using a conventionally known manufacturing drum or a winding device, and as shown in FIG. After forming into a cylindrical shape, the cushioning material 2 is spaced apart in the circumferential direction across the outer peripheral surface, inner peripheral surface, and left and right side surfaces of the hollow cylindrical belt-shaped member 1A (in the embodiment, at intervals of 90 degrees). 4 places) It is manufactured by winding and binding a binding band 3 as a binding material around each buffer material 2 and winding it.

  Thereby, the band-shaped member binding body 1 is formed by binding the band-shaped member 100 at a plurality of positions in the direction intersecting the winding direction of the hollow cylindrical band-shaped member 1A formed by winding the band-shaped member 100. 100 unraveling can be reliably prevented.

  Here, the buffer material 2 is used to prevent the band-shaped member 100 from being deformed and damaged by the binding of the binding band 3. As the cushioning material 2, a structure in which a laminated cardboard is wound once around the outer peripheral surface, inner peripheral surface, and left and right side surfaces of the hollow cylindrical belt-shaped member 1A and both ends are abutted on the inner peripheral surface side is adopted. In addition to corrugated cardboard, plastic, rubber, cloth (fiber) or the like can be used as long as it has performance.

  Further, as the binding band 3, a polyester band having a small decrease in breaking strength at the time of storage was used. However, a string, a wire, a band, a belt, a chain, or the like may be used. Can be used.

  Such a band-shaped member bundle 1 is carried out to a storage place, and stored in a storage place with a ring stopper in a vertically placed state in which the hollow portion is directed in the left-right direction (see FIG. 1).

  In storing the band-shaped member bundle 1, after wrapping a wrapping paper such as cardboard around the outer peripheral surface and the inner peripheral surface, the outer peripheral surface and the left and right side surfaces are covered with a light shielding sheet (not shown) in order to prevent UV degradation. It is preferable to do.

  Further, when the stored band-shaped member bundle 1 is transported to the construction site, after removing the light shielding sheet and the wrapping paper, the band 3 is further tightened as necessary to prevent the band-shaped member 100 from loosening. .

  On the other hand, as shown in FIG. 2, the construction jig 10 includes a pair of left and right side frames 11 and 11, and tension bars as a plurality of connecting members detachably connected between the side frames 11 and 11. 12.

  Each side frame 11 includes an inner peripheral ring 13, an outer peripheral ring 14, and a plurality of reinforcing bars 15 (in the embodiment) that are radially connected between the inner peripheral ring 13 and the outer peripheral ring 14 at intervals in the circumferential direction. Among these, every other reinforcing bar 15 has a plurality of mounting holes 15a located on the same radius from the center of the side frame 11, respectively, at a set interval in the longitudinal direction. 11 is formed in parallel with the central axis direction.

  The tension bar 12 is a cylindrical body having the same structure in which a mounting plate having female threads formed at both ends of a square pipe is fixed. The tension bar 12 passes through an arbitrary mounting hole 15a of the reinforcing bar 15 in the side frame 11 and the tension bar 12 By screwing into the internal thread, the tension bar 12 can be detachably connected to the mounting hole 15a corresponding to the selected inner diameter of the side frame 11.

  In order to assemble the construction jig 10 configured as described above, a tension bar disposed between the left and right side frames 11 by inserting bolts through the mounting holes 15a set in the opposing reinforcing bars 15 in the left and right side frames 11. A plurality of tension bars 12 are connected to the left and right side frames 11 over a half circumference (5 in the embodiment).

  In this case, each tension bar 12 is connected in turn to mounting holes 15 a that are set based on the outer diameter of the strip-shaped member bundle 1 and that are located on the same circumference with an inner diameter larger than the outer diameter. As a result, the construction jig 10 is assembled in which the left and right side frames 11 are connected by a half circumference by the plurality of tension bars 12 positioned on the same circumference at intervals in the circumferential direction.

  If the left and right side frames 11 are self-supporting and the strength to support the band-shaped member bundle 1 is ensured, it is not always necessary to connect the plurality of tension bars 12 to the left and right side frames 11 over a half circumference. A plurality of tension bars 12 may be connected at intervals in the circumferential direction over a range less than a half circumference.

  In the assembled construction jig 10, the left and right side frames 11 are rotatably supported by a pair of rotating rollers 21, and a half circumference where a tension bar 12 is connected is a lower half. (See FIG. 3).

  Next, the belt-like member bundle 1 transported to the construction site is lifted using a crane or the like with the hollow portion horizontally oriented, and the left and right side surfaces are along the inner surfaces of the left and right side frames 11. The jig 10 is dropped between the left and right side frames 11 (see FIG. 4). As a result, the band-shaped member bundle 1 is supported by the plurality of tension bars 12 at the outer peripheral surface of the lower half thereof.

  In this case, the tension bar 12 is connected on the same circumference having an inner diameter larger than the outer diameter, which is set based on the outer diameter of the band-shaped member bundle 1. The center of the band-shaped member bundle 1 supported by the plurality of connected tension bars 12 is positioned below the rotation center of the construction jig 10.

Thereafter, the remaining tension bars 12 are also connected across the left and right side frames 11 through the mounting holes 15a located on the inner diameter set based on the outer diameter of the band-shaped member bundle 1. Thus, the band-shaped member bundle 1 is connected on the same circumference having an inner diameter larger than the outer diameter set based on the left and right side frames 11 of the construction jig 10 and the outer diameter of the band-shaped member bundle 1. can be accommodated without dropping the space defined by a plurality of tension bars 12 which are (see FIG. 5).

  When the band-shaped member bundle 1 is accommodated in the construction jig 10, the band 3 is cut to release the binding in the direction intersecting the winding direction of the band member 100. At this time, the belt-like member 100 is formed in a hollow cylindrical shape while moving in the circumferential direction so as to be wound in a direction opposite to the winding direction by a restoring force of elastic deformation when the belt-shaped member bundle 1 is wound. The outer diameter of the belt-like member 1A is expanded, and the outer peripheral surface thereof is pressed against a plurality of tension bars 12 connected to be connected on the same circumference by a reduced restoring force. As a result, the hollow cylindrical belt-like member 1A having an expanded outer diameter is supported by pressing its outer peripheral surface against a plurality of tension bars 12 connected on the same radius from the rotation center of the construction jig 10. Therefore, the center of the hollow cylindrical strip member 1A is also located on the rotation center of the construction jig 10 (see FIG. 2).

  In this state, the winding start end of the band-shaped member 100 is pulled out from the inner peripheral side of the hollow cylindrical band-shaped member 1 </ b> A, and is pulled out through the inner peripheral ring 14 of the side frame 11. Then, the belt-like member 100 is pulled out while rotating the construction jig 10 using the turntable 20, and one end thereof is guided into an existing pipe through a manhole (not shown).

  At this time, since the center of the hollow cylindrical belt-shaped member 1A is positioned at the rotation center of the construction jig 10, the construction jig 10 can be stably rotated, and the belt-shaped member 100 can be reliably secured. Can be pulled out.

  In the above-described embodiment, a plurality of tension bars 12 corresponding to a half circumference located on the same circumference of the set inner diameter are connected across the left and right side frames 11, and a belt-like shape is formed using a crane. Although the case where the member binding body 1 is dropped into the construction jig 10 has been described, as shown in FIG. 6, the assembled construction jig 10 is rolled toward the belt-shaped member binding body 1, and the belt-shaped member binding body is obtained. You may make it accommodate in 1 to cover. Then, the construction jig 10 that houses the band-shaped member bundle 1 may be lifted using a crane, a forklift, or the like and installed on the turntable 20.

DESCRIPTION OF SYMBOLS 1 Band-shaped member binding body 1A Hollow cylindrical band-shaped member 2 Cushioning material 3 Binding band (binding material)
10 Construction Jig 11 Side Frame 12 Tension Bar (Connecting Material)
13 Inner ring 14 Outer ring 15 Reinforcement bar 15a Mounting hole 20 Turntable 100 Strip member

Claims (2)

A plurality of strap which is wound at intervals strip-shaped elongated member is elastically deformed into a hollow cylindrical shape left and right side surfaces of the hollow cylindrical belt member wound up sequentially, the inner and outer peripheral surfaces in the circumferential direction The left and right side frames in which a plurality of reinforcing bars are radially connected between the outer peripheral ring and the inner peripheral ring with a spacing in the circumferential direction, and the reinforcements facing the left and right side frames. in accommodating the construction jig comprising a plurality of connection members of circumferentially Ru is connected at intervals to 桟間,
Based on the outer diameter of the band-shaped member bundle, the connecting material is connected so as to be located on the same circumference with an inner diameter of 102 to 143% with respect to the outer diameter,
After the hollow part is accommodated in the space formed by the left and right side frames of the construction jig and a plurality of connecting members in the left-right direction, the band-shaped member bundle is released to recover the elastic deformation of the band-shaped member. After loosening in the rewind direction by force, the outer diameter of the hollow cylindrical strip member is expanded and the outer peripheral surface is pressed against a plurality of connecting members, and then the construction jig is rotated to rotate the hollow cylindrical strip member. A construction method using a construction tool for a strip-shaped member bundle, wherein the strip-shaped member is pulled out from the inner circumferential side through an inner circumferential ring.   In the construction method using the construction jig for the band-shaped member bundle according to claim 1, a plurality of mounting holes are formed and selected at a set interval in the radial direction in the reinforcing bar of each side frame. A construction method using a jig for constructing a band-shaped member bundle, wherein a coupling material can be coupled to the mounting hole.

Images