Formwork forming auxiliary tool, formwork forming device, and formwork installation structure

Abstract

To provide a formwork forming auxiliary tool, a formwork forming device, and a formwork installation structure that enable formwork to be easily installed.SOLUTION: A formwork forming auxiliary tool 30 includes a spacing determination member 31 and a formwork plate connecting member 41. The spacing determination member 31 has a pair of opposing straight portions 32 spaced apart by a distance wider than an outer diameter of a protective tube, and a connecting portion 33 connecting ends of the pair of straight portions 32. The formwork plate connecting member 41 has a plate-shaped base 43 and a pair of grooves 47 that open in opposite directions across the base 43, extend parallel to each other, and can fit edge portions of formwork plates, and further has an attachment portion 49 that attaches the straight portions 32 to the base 43. By attaching each of the pair of straight portions 32 to the base 43 using the attachment portion 49, the spacing determination member 31 enables determination of spacing between the pair of formwork plate connecting members 41.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a formwork forming auxiliary tool, a formwork forming device, and a formwork installation structure. [Background technology]

[0002] For example, on roads, pipes are laid below the asphalt pavement surface that forms the road surface (see, for example, Patent Document 1). Wiring such as power transmission cables and communication cables is inserted into the pipes, and the pipes protect the wiring. The pipes are embedded in protective concrete formed below the asphalt pavement surface. The protective concrete prevents the pipes from being crushed by the weight of vehicles traveling on the road. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-37240 Summary of the Invention [Problem to be solved by the invention]

[0004] Protective concrete is formed by setting up formwork and then pouring concrete between the formwork, but setting up the formwork is a tedious process. [Means for solving the problem]

[0005] The formwork forming auxiliary tool for solving the above problems is a formwork forming auxiliary tool used to assist in the installation of a form for the protective concrete when forming protective concrete that protects buried pipe material, and is used to install formwork plates that are arranged facing each other across the diameter of the pipe material to form the formwork, and has a U-shaped spacing determining member that has a pair of straight sections that face each other with a gap wider than the outer diameter of the pipe material and has a connecting portion that connects the ends of the pair of straight sections, and a formwork plate connecting member that has a plate-like base and opens in opposite directions across the base, has a pair of grooves that extend parallel to each other and can fit the edge portions of the formwork plates, and has an attaching portion that attaches the straight sections to the base, and the gist of the formwork forming auxiliary tool is that by attaching each of the pair of straight sections to the base using the attaching portion, it is possible to determine the spacing between the pair of formwork plate connecting members by the spacing determining member.

[0006] In the formwork forming auxiliary tool, the spacing determining member is formed by bending a rod-shaped body into the U-shape, and the mounting portion is a separate member from the formwork plate connecting member and is composed of a retaining member that holds the straight portion and a mounting hole provided in the base for mounting the retaining member, and the mounting holes may be formed in multiple numbers so that the retaining member can be moved and mounted in different positions, or so that multiple retaining members can be mounted.

[0007] The formwork forming device for solving the above problems is a formwork forming device used to form a form for protective concrete when forming protective concrete that protects buried pipe material, and comprises formwork plates that form the formwork and are arranged to face each other with the pipe material sandwiched in the radial direction, and a formwork forming auxiliary tool used to assist in the installation of the formwork, wherein the formwork forming auxiliary tool has a pair of straight parts that face each other with a gap wider than the outer diameter of the pipe material and has a U-shaped spacing determining member that has a connecting part that connects the ends of the pair of straight parts, and a plate-like base that opens in opposite directions on either side of the base and is flat against each other and form plate connecting members each having a pair of grooves extending in a row and into which the edge portions of the form plate can be fitted, and having an attachment portion for attaching the straight portion to the base, wherein a plurality of form supports formed by assembling a pair of the form plate connecting members and the spacing determining member are arranged spaced apart in the laying direction of the pipe material, and the edge portions of the form plate are fitted into the grooves that are adjacent to each other in the laying direction and open facing each other, the form plates are arranged in opposing directions perpendicular to the laying direction with the pipe material between them, and form walls opposing in the opposing directions are formed by the plurality of form plates extending in the laying direction.

[0008] In the formwork forming apparatus, the formwork plate connecting members of the formwork supports adjacent in the laying direction may be connected in the laying direction by a connecting device. Regarding the formwork forming device, the connection device may have a rod-shaped connecting rod extending linearly in the laying direction, a holding portion that holds the connecting rod, and a holding member for the connection device that is integral with the holding portion and has an assembly portion that is assembled to the base, and the holding member for the connection device may be capable of holding the connecting rod in a state aligned with the plate surface of the formwork plate.

[0009] With regard to the formwork forming device, the base has an erection section to which an erection member that is erected on a pair of formwork plate connecting members facing each other in the opposing direction and buried in the protective concrete can be attached, and the erection section may be located at a position above the pipe material that allows the erection member to be attached.

[0010] With regard to the formwork forming device, the base has an erection section to which an erection member that is erected on a pair of formwork plate connecting members facing each other in the opposing direction and that is embedded in the protective concrete can be attached, and the erection section may be located above the pipe material and in a position that allows the erection member to be attached at multiple locations.

[0011] The form installation structure for solving the above problems is a form installation structure for installing a form for forming protective concrete that protects buried pipe material, and includes form plates that form the form and are arranged so as to face each other across the pipe material in the radial direction, and a form formation auxiliary tool used to assist in the installation of the form, wherein the form formation auxiliary tool has a U-shaped spacing determining member having a pair of linear portions that face each other at a distance wider than the outer diameter of the pipe material and having a connecting portion that connects the ends of the pair of linear portions, and a pair of grooves that have a plate-like base and open in opposite directions across the base, extend parallel to each other, and can fit the edge portions of the form plates. and a form plate connecting member having an attachment portion for attaching the straight portion to the base, wherein a plurality of form supports formed by assembling a pair of the form plate connecting members and the spacing determining member are arranged spaced apart in the laying direction of the pipe material, the pipe material is arranged above a plurality of the connecting portions, the edge portions of the form plate are fitted into the groove portions that are adjacent to each other in the laying direction and open facing each other, the form plates are arranged on either side of the pipe material in opposing directions perpendicular to the laying direction, and a pair of form walls extending in the laying direction are formed by the plurality of form plates extending in the laying direction.

[0012] The formwork installation structure may have an erection member that is erected on a pair of formwork plate connecting members that face each other in the opposing direction, and that is above the pipe material laid above the connecting portion and crosses the opposing direction.

[0013] In the formwork installation structure, the two formwork plate connecting members sandwiching one of the formwork plates are connected in the laying direction of the pipe material by a straight-extending rod-shaped connecting rod, and the end of the connecting rod may be connected to the end of another connecting rod adjacent to the pipe material in the laying direction. [Effects of the Invention]

[0014] The present invention allows for easy installation of formwork. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a cross-sectional view showing the protective concrete, the protective pipe, and the ground. [Figure 2] FIG. 2 is a perspective view showing a form forming device and a form installation structure. [Figure 3] FIG. 3 is an exploded perspective view showing the form plate connecting members and the holding members. [Figure 4] FIG. 4 is a plan view showing the formwork plate connecting member. [Figure 5] FIG. 5 is a perspective view showing a form forming auxiliary tool and a form support tool. [Figure 6] FIG. 6 is a side view showing a form forming auxiliary tool and a form support tool. [Figure 7] FIG. 7 is a perspective view showing the holding member. [Figure 8] FIG. 8 is a perspective view of the formwork supports installed at a distance in the laying direction. [Figure 9] FIG. 9 is a perspective view of the form plates connected by the form plate connecting members. [Figure 10] FIG. 10 is a perspective view of the form plate connecting members connected to each other by the connecting device. [Figure 11] FIG. 11 is a perspective view of the state in which the supporting reinforcing bars are installed. [Figure 12] FIG. 12 is a perspective view of the pipe lift-up prevention reinforcing bar in an installed state. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, one embodiment of a form forming auxiliary tool, a form forming device, and a form installation structure will be described with reference to Figs. <road> As shown in FIG. 1, protective concrete 13 is buried in ground 12 paved with asphalt 11. The road surface is formed by an asphalt pavement surface 11a. Protective pipes 14 serving as piping materials are buried in protective concrete 13. Therefore, protective concrete 13 protects the buried protective pipes 14. Wiring 15, such as a power transmission cable or a communication cable, is inserted into protective pipe 14. In addition to protective pipes 14, examples of piping materials include water pipes and gas pipes. Furthermore, a protective plate 16 is installed between protective concrete 13 and asphalt 11. The protective concrete 13 is then formed using formwork.

[0017] <Formwork forming device> As shown in FIG. 2 , the formwork 20 is formed by a pair of formwork walls W extending in the laying direction H of the protective pipe 14. The pair of formwork walls W are formed using a formwork forming device 21. Therefore, the formwork forming device 21 is used to form the formwork 20 for the protective concrete 13 when forming the protective concrete 13 that protects the buried protective pipe 14. The formwork forming device 21 has a plurality of formwork plates 23 and a plurality of formwork forming auxiliary tools 30. The plurality of formwork plates 23 form the formwork 20 and are arranged so as to face each other across the radial direction of the laid protective pipe 14. The plurality of formwork forming auxiliary tools 30 are used to install the formwork plates 23. The formwork forming device 21 is also formed using a plurality of formwork supports 70 formed using the formwork forming auxiliary tools 30.

[0018] <Formwork forming aids> The formwork formation auxiliary tool 30 has a U-shaped spacing determining member 31 and a substantially plate-shaped formwork plate connecting member 41. The formwork plate connecting member 41 also has an attachment portion 49.

[0019] <Spacing determining member> As shown in FIGS. 5 and 6 , the spacing determining member 31 is formed by bending a rod-shaped body into a U-shape. The spacing determining member 31 is made of rebar having a required thickness. Specifically, the spacing determining member 31 is made of 3 / 4" rebar. The spacing determining member 31 has a pair of straight portions 32 and a connecting portion 33 connecting the ends of the pair of straight portions 32. In the spacing determining member 31, the portion connecting the straight portions 32 and the connecting portion 33 may be at a right angle or curved. Even if the portion connecting the straight portions 32 and the connecting portion 33 is not at a right angle, the spacing determining member 31 is still U-shaped. The pair of straight portions 32 have the same length. The connecting portion 33 connects one end of the pair of straight portions 32 to each other. When the connecting portion 33 is placed on a horizontal surface, the other ends of the pair of straight portions 32 are located at the same height. The pair of straight portions 32 are spaced apart by the length of the connecting portion 33. The length of connecting portion 33 is at least three times but less than four times the outer diameter of protective tube 14. Therefore, the pair of straight portions 32 face each other in the length direction of connecting portion 33 at a distance wider than the outer diameter of protective tube 14. Therefore, spacing determining member 31 has a pair of straight portions 32 facing each other at a distance wider than the outer diameter of protective tube 14, and is U-shaped having connecting portion 33 connecting the ends of the pair of straight portions 32.

[0020] <Formwork plate connecting member> As shown in Fig. 3, formwork plate connecting member 41 is formed by shaping rectangular metal plate 42. The metal plate 42 before shaping is shown by the two-dot chain line in Fig. 3. The longitudinal direction of metal plate 42 is defined as a first direction X of formwork plate connecting member 41, and the lateral direction of metal plate 42 is defined as a second direction Y. The dimension of formwork plate connecting member 41 in first direction X is the same as or approximately the same as the dimension of formwork plate 23 in the lateral direction.

[0021] 3 and 4, the formwork plate connecting member 41 has a base 43, first groove forming portions 44 divided in the first direction X, and second groove forming portions 45 located between the first groove forming portions 44. The formwork plate connecting member 41 also has a plurality of erection portions 43a, and an attachment portion 49 provided on the base 43. The formwork plate connecting member 41 has a first plate surface 41a and a second plate surface 41b that are opposite surfaces in the plate thickness direction. Each of the first plate surface 41a and the second plate surface 41b is flat.

[0022] The base 43 is an elongated rectangular plate extending over the entire formwork plate connecting member 41 in the first direction X. The first groove forming portions 44 are provided at both ends of the base 43 in the first direction X. The first groove forming portions 44 are spaced apart in the first direction X of the formwork plate connecting member 41. Each first groove forming portion 44 extends further on both sides in the second direction Y than the base 43. Specifically, each first groove forming portion 44 protrudes in the second direction Y in the shape of an elongated rectangular plate. The base 43 and the first groove forming portions 44 are located on the same plane on each of the first plate surface 41a and the second plate surface 41b.

[0023] The second groove forming portions 45 are provided between the first groove forming portions 44 divided in the first direction X, and extend on both sides of the base 43 in the second direction Y. Each second groove forming portion 45 extending in the second direction Y has an extending wall 45a extending perpendicular to the base 43 and a retaining wall 45b extending perpendicular to the extending wall 45a. Each extending wall 45a extends from the first plate surface 41a of the formwork plate connecting member 41. The two extending walls 45a are parallel to each other. Each second groove forming portion 45 is formed by cutting and raising an L-shaped portion of the metal plate 42 between the first groove forming portions 44 divided in the first direction X. Therefore, a gap is defined between the first groove forming portions 44 divided in the first direction X. The two second groove forming portions 45 extend parallel to each other in the first direction X.

[0024] When viewing the formwork plate connecting member 41 in the first direction X, the shortest distance L between the first plate surface 41a at the first groove forming portion 44 and the second plate surface 41b at the retaining wall 45b is slightly longer than the plate thickness D of the formwork plate 23.

[0025] The extension length of the retaining wall 45b from the extending wall 45a in the second direction Y is slightly shorter than the extension length of the first groove forming portion 44 from the base 43 in the second direction Y. Therefore, when the formwork plate connecting member 41 is viewed in the plate thickness direction from the second groove forming portion 45 side, the first groove forming portion 44 protrudes in the second direction Y further than the retaining wall 45b. In other words, when the formwork plate connecting member 41 is viewed in the plate thickness direction from the second groove forming portion 45 side, the retaining wall 45b is positioned more recessed in the second direction Y than the first groove forming portion 44.

[0026] A pair of groove portions 47 are defined in the formwork plate connecting member 41. Specifically, in the formwork plate connecting member 41, the first groove forming portion 44 sandwiches the second groove forming portion 45 in the first direction X on both sides in the second direction Y, thereby providing groove portions 47 on both sides in the second direction Y that are formed by the first groove forming portion 44 and the second groove forming portion 45 working together.

[0027] Therefore, the pair of grooves 47 are defined further outward in the second direction Y than the base 43. Each groove 47 is formed by a first groove-forming portion 44 divided in the first direction X and a second groove-forming portion 45 between the first groove-forming portions 44. When the formwork plate connecting member 41 is viewed in the plate thickness direction from the second groove-forming portion 45 side, the first groove-forming portion 44 and the second groove-forming portion 45 are aligned in the first direction X. Therefore, the first groove-forming portion 44 and the second groove-forming portion 45 do not face each other in the plate thickness direction of the base 43. Therefore, when the formwork plate connecting member 41 is viewed in the first direction X, each groove 47 is formed in a groove shape by the first groove-forming portion 44 and the second groove-forming portion 45. Therefore, when the formwork plate connecting member 41 is viewed in the first direction X, each of the pair of grooves 47 is U-shaped and defined further outward in the second direction Y than the base 43. The pair of groove portions 47 open in opposite directions across the base portion 43 in the second direction Y. Furthermore, since the two second groove forming portions 45 extend parallel to each other in the first direction X, the pair of groove portions 47 formed using the second groove forming portions 45 also extend parallel to each other in the first direction X.

[0028] As described above, the shortest distance between the first plate surface 41a at the first groove forming portion 44 and the second plate surface 41b at the retaining wall 45b is also L. The shortest distance L is slightly greater than the plate thickness D of the formwork plate 23. Therefore, the edge portions 23a located at the longitudinal ends of the formwork plate 23 can be fitted into each groove 47. Therefore, the grooves 47 open in opposite directions across the base 43, extend parallel to each other, and can fit the edge portions 23a of the formwork plate 23.

[0029] As shown in FIGS. 3 and 5 , a plurality of erection sections 43a are provided in the first direction X of the base 43. The erection sections 43a are arranged at equal intervals in the first direction X. Each erection section 43a is shaped like an elongated hole extending longitudinally in the second direction Y of the formwork plate connecting member 41. The longitudinal dimension of the erection section 43a is slightly larger than twice the diameter of the straight section 32. Of the plurality of erection sections 43a, the erection sections 43a located at both ends in the first direction X are defined as outermost erection sections 431. The formwork plate connecting member 41 has two outermost erection sections 431. An erection member 90 (described later) can be attached to each erection section 43a. That is, the erection section 43a can be attached to the erection member 90, which is erected on a pair of formwork plate connecting members 41 facing each other and buried in the protective concrete 13. Furthermore, the bridging portion 43a is provided at a position on the base 43 where the bridging member 90 can be attached at a plurality of locations. Specifically, the bridging portion 43a is provided at a position on the base 43 where the bridging member 90 can be attached at a plurality of different locations in the up-down direction.

[0030] The base 43 is provided with first mounting holes 43b located more inward in the first direction X than the outermost mounting portions 431. Therefore, the base 43 is provided with first mounting holes 43b in two locations. The two first mounting holes 43b are provided at the same position on the base 43 in the second direction Y. Therefore, the two first mounting holes 43b are provided next to each other in the first direction X.

[0031] Each first mounting hole 43b is formed by two holes spaced apart from each other in the second direction Y. One of the two first mounting holes 43b is square, and the other is round. The base 43 is also provided with second mounting holes 43c that are positioned adjacent to each outermost mounting portion 431 in the second direction Y. Therefore, the base 43 is provided with second mounting holes 43c in two locations. Each second mounting hole 43c is formed by two holes spaced apart from each other in the first direction X. One of the two second mounting holes 43c is square, and the other is round.

[0032] <Mounting part> The mounting portion 49 is provided for mounting the straight portion 32 of the spacing determination member 31 to the base portion 43. The mounting portion 49 is composed of a holding member 50 that holds the straight portion 32, and a first mounting hole 43b provided in the base portion 43 for mounting the holding member 50. The holding member 50 is a separate member from the formwork plate connecting member 41.

[0033] As shown in FIG. 7, the holding member 50 has an assembly portion 51 and a holding portion 56 that face each other, and a biasing portion 60 that connects the assembly portion 51 and the holding portion 56 and biases them in a direction that brings them closer to each other.

[0034] The assembly part 51 has an elongated plate-shaped assembly base plate 52, a pair of positioning plates 53 protruding from a pair of long edges of the assembly base plate 52 (only one of which is shown in Figure 7), a protrusion 54 protruding from one longitudinal end of the assembly base plate 52, and a first insertion hole 55 provided on the other longitudinal end side of the assembly base plate 52.

[0035] In the longitudinal direction of the mounting board 52, the distance between the protrusion 54 and the first insertion hole 55 is approximately the same as the distance between the two first mounting holes 43b and the distance between the two second mounting holes 43c. Therefore, when the protrusion 54 is inserted into the square-shaped first mounting hole 43b, the first insertion hole 55 can be made to face the round hole. Similarly, when the protrusion 54 is inserted into the square-shaped second mounting hole 43c, the first insertion hole 55 can be made to face the round hole.

[0036] The pair of positioning plates 53 are elongated plates extending in the longitudinal direction of the mounting board 52. The pair of positioning plates 53 are provided closer to the first insertion holes 55 in the longitudinal direction of the mounting board 52. Therefore, no positioning plate 53 is provided on a portion of the mounting board 52 on the side of the protruding pieces 54. Each of the pair of positioning plates 53 has a positioning edge 52a on the edge closer to the protruding pieces 54 in the longitudinal direction. The positioning edge 52a is formed so as to rise in an arc shape from the mounting board 52 as it moves from the protruding pieces 54 side toward the first insertion holes 55 side in the longitudinal direction of the mounting board 52.

[0037] The holding portion 56 has a holding base 57 in the shape of an elongated plate, a pair of holding plate portions 58 protruding from a pair of long edges of the holding base 57, and a second insertion hole 59 provided in the holding base 57 at a position facing the first insertion hole 55. The pair of holding plate portions 58 are long plate-shaped and extend the entire length of the holding base 57. Each of the pair of holding plate portions 58 has a holding recess 58a on the side opposite the second insertion hole 59. The holding recess 58a is recessed in a semicircular shape from the edge of the holding plate portion 58 on the side opposite the holding base 57 side toward the holding base 57. The positioning edge 52a and the holding recess 58a face each other.

[0038] The biasing portion 60 connects the ends of the mounting substrate 52 and the holding substrate 57 on the first insertion hole 55 and second insertion hole 59 side in the longitudinal direction of each of them. The biasing portion 60 also biases the mounting portion 51 and the holding portion 56 in a direction narrowing the gap between them. The direction narrowing the gap between the mounting portion 51 and the holding portion 56 coincides with the direction narrowing the gap between the mounting substrate 52 and the holding substrate 57. The mounting portion 51 and the holding portion 56 are elastically deformable in a direction widening the gap between them against the biasing force of the biasing portion 60.

[0039] 3, the holding member 50 has a first insertion hole 55 and a second insertion hole 59 through which a screw 62 can be inserted. The holding member 50 is attached to the base 43 by inserting the screw 62 into the first mounting hole 43b or the second mounting hole 43c and threading it into the holding member 50.

[0040] As described above, the first mounting holes 43b are provided in two locations on the base 43. Therefore, a plurality of first mounting holes 43b are formed so that the holding member 50 can be attached at different positions or so that two holding members 50 can be attached to the base 43.

[0041] <Formwork support> The form support 70 is formed by assembling a pair of form plate connecting members 41 and one spacing determining member 31.

[0042] A method for manufacturing the form support tool 70 will be described together with the function of the form formation auxiliary tool 30. A pair of formwork plate connecting members 41, one spacing determining member 31, four holding members 50 and four screws 62 are prepared.

[0043] First, two holding members 50 are attached to each formwork plate connecting member 41. The worker places each holding member 50 on the first plate surface 41a side of the base 43 and inserts the protruding pieces 54 into the square holes of each first mounting hole 43b. Next, as shown in FIG. 3, the worker inserts the screws 62 inserted into the round holes of each first mounting hole 43b from the second plate surface 41b side of the base 43 into the first insertion holes 55 and the second insertion holes 59 and forcibly screws the screws 62 into the holding portions 56 in the second insertion holes 59. This attaches each of the two holding members 50 to the base 43. The two holding members 50 are attached to the formwork plate connecting member 41 in positions aligned in the first direction X and with the protruding pieces 54 facing the same direction.

[0044] Next, the straight portion 32 of the spacing determining member 31 is held by the two holding members 50. The worker presses one straight portion 32 of the spacing determining member 31 against the two holding members 50 from the protruding piece 54 side. This causes the gap between the assembly portion 51 and the holding portion 56 of each holding member 50 to widen against the biasing force of the biasing portion 60, widening the gap between the assembly board 52 and the holding board 57. When the worker further presses the straight portion 32 toward the holding member 50, a portion of the straight portion 32 is inserted into the holding recess 58a. Then, due to the restoring force of the widened biasing portion 60, the gap between the assembly portion 51 and the holding portion 56 returns to its original state. This narrows the gap between the assembly portion 51 and the holding portion 56, and the straight portion 32 is held inside the holding recess 58a. At this time, the positioning edge 52a comes into contact with the straight portion 32 from the opening side of the holding recess 58a, and the assembly board 52 is pressed against the straight portion 32. As a result, the straight portions 32 are clamped by the retaining members 50, and the spacing determining members 31 are attached to the formwork plate connecting members 41 by the two retaining members 50. Note that the work of widening the gap between the assembly portion 51 and the retaining portion 56 of each retaining member 50 may be performed manually by an operator, instead of by pressing the straight portions 32 against the retaining members 50.

[0045] Therefore, the mounting portion 49 is a separate member from the formwork plate connecting member 41, and is composed of a holding member 50 that holds the straight portion 32, and a first mounting hole 43b provided in the base 43 for mounting the holding member 50. Two first mounting holes 43b are formed in the base 43 so that two holding members 50 can be mounted. Therefore, the straight portion 32 is mounted to the formwork plate connecting member 41 by the two holding members 50. The formwork plate connecting member 41 also has mounting portions 49 that mount the straight portion 32 to the base 43.

[0046] In the same manner as above, the worker also attaches the straight section 32 to the other form plate connecting member 41 using the retaining members 50. Then, the pair of form plate connecting members 41 and one spacing determining member 31 are assembled together using four retaining members 50 and four screws 62. Then, the pair of form plate connecting members 41 and one spacing determining member 31 are assembled together to form a set of form supports 70.

[0047] As shown in FIG. 5 , the formwork support 70 has a constant distance between the first plate surfaces 41a of the formwork plate connecting members 41 determined by the spacing determining members 31. The distance between the pair of formwork plate connecting members 41 is determined by the length of the connecting portions 33 of the spacing determining members 31. As described above, the length of the connecting portions 33 is at least three times but less than four times the outer diameter of the protective tube 14. Therefore, the distance between the pair of formwork plate connecting members 41 is determined to be at least three times but less than four times the outer diameter of the protective tube 14. Therefore, the formwork formation auxiliary tool 30 has a pair of straight portions 32 attached to the base 43 using the mounting portions 49, which enables the spacing between the pair of formwork plate connecting members 41 to be determined by the spacing determining members 31.

[0048] In the form support 70, the lower edge of the connecting portion 33 of the spacing member 31 is arranged on the same plane as the lower edges of the pair of form plate connecting members 41, and the upper ends of the straight portions 32 of the spacing member 31 are arranged on the same plane as the upper edges of the pair of form plate connecting members 41. In the form support 70, the groove portions 47 of each form plate connecting member 41 open on both sides in the second direction Y with the straight portion 32 as the center.

[0049] <Formwork forming device> Next, the formwork forming device 21 will be described. 2, the formwork forming device 21 has a plurality of formwork plates 23 and a plurality of formwork supports 70. The formwork forming device 21 also has a connecting device 80 that connects the formwork plate connecting members 41 of adjacent formwork supports 70 in the laying direction H. The formwork forming device 21 also has an erection member 90 that is attached to the base 43 by an erection portion 43a.

[0050] <Connection device> The connection device 80 has a long, rod-shaped connecting rod 81 that extends linearly in the laying direction H, and the above-mentioned holding member 50. The holding member 50 used in the connection device 80 will be referred to as a connection device holding member 501. The holding member 50 and the connection device holding member 501 have the same configuration.

[0051] The connecting rod 81 is a reinforcing bar that extends linearly in the laying direction H of the protective pipe 14. Specifically, the connecting rod 81 is made of 3 / 4 reinforcement bar. The connecting device holding member 501 is capable of holding the connecting rod 81 inside the holding recess 58a of the holding part 56. Therefore, the connecting device holding member 501 has the holding part 56 that holds the connecting rod 81, and the assembly part 51 that is integral with the holding part 56 and is assembled to the base 43.

[0052] <Installation members> The erection member 90 includes a support rebar 91 and a pipe-floating prevention rebar 92. The support rebar 91 and the pipe-floating prevention rebar 92 are each made of rod-shaped rebar. Specifically, the support rebar 91 and the pipe-floating prevention rebar 92 are each made of 3 / 4" rebar. The diameters of the support rebar 91 and the pipe-floating prevention rebar 92 are the same as or approximately the same as the diameter of the spacing determination member 31, but may be different. The lengths of the support rebar 91 and the pipe-floating prevention rebar 92 are longer than the length of the connecting portion 33. In other words, the lengths of the support rebar 91 and the pipe-floating prevention rebar 92 are three times or more the outer diameter of the protective pipe 14. The support rebar 91 and the pipe-floating prevention rebar 92 can each be inserted into the erection portion 43a of the formwork plate connecting member 41. That is, both the dimension of the erection portion 43a in the first direction X and the dimension of the erection portion 43a in the second direction Y are larger than the diameters of the support reinforcing bars 91 and the pipe lift-up prevention reinforcing bars 92.

[0053] <Method of manufacturing a formwork forming device> As shown in Fig. 8, a plurality of formwork supports 70 are arranged at intervals in the laying direction H of the protective pipe 14. The laying direction H of the protective pipe 14 is the direction in which the protective pipe 14 extends. Although the protective pipe 14 may meander slightly, the laying direction H of the protective pipe 14 extends in a straight line.

[0054] The multiple form supports 70 are arranged with their connecting portions 33 perpendicular to the laying direction H. Therefore, when the protective pipe 14 is laid, the pair of form plate connecting members 41 of each form support 70 face each other, sandwiching the protective pipe 14 in the radial direction. Furthermore, between form supports 70 adjacent to each other in the laying direction H, the grooves 47 of the form plate connecting members 41 adjacent to each other in the laying direction H are open and face each other.

[0055] As shown in FIG. 9 , one longitudinal edge 23a of each formwork plate 23 is fitted into one groove 47 of an adjacent formwork plate connecting member 41 in the laying direction H, and the other longitudinal edge 23a of each formwork plate 23 is fitted into the other groove 47 of an adjacent formwork plate connecting member 41 in the laying direction H. As a result, each formwork plate 23 is supported by a pair of formwork supports 70. The formwork plate 23 is installed with its short side aligned with the up-down direction and its long side aligned with the laying direction H. In other words, the formwork plate 23 is installed with its short side aligned with the first direction X of the formwork plate connecting members 41 and its long side aligned with the second direction Y of the formwork plate connecting members 41. The pair of formwork plates 23 are installed by a pair of formwork supports 70 adjacent to each other in the laying direction H. The form plates 23 installed by a pair of form supports 70 face each other in an opposing direction perpendicular to the laying direction H. The form plates 23 are installed between the multiple form supports 70 adjacent to each other in the laying direction H.

[0056] As a result, in the formwork forming device 21, the multiple formwork plates 23 are supported by the formwork supports 70, and therefore the multiple formwork plates 23 are installed in a state extending in the laying direction H of the protective pipe 14. Therefore, in the formwork forming device 21, a formwork wall W is formed by the multiple formwork plates 23 extending in the laying direction H of the protective pipe 14. The formwork walls W are formed in pairs so as to face each other in a direction perpendicular to the laying direction H.

[0057] Next, the form plate connecting members 41 of the form supports 70 adjacent to each other in the laying direction H are connected by the connecting device 80. First, the connection device holding member 501 is attached to each form plate connecting member 41. The connection device holding member 501 is attached to the upper one of the two second mounting holes 43c.

[0058] The worker places the connection device holding member 501 on the second plate surface 41b side of the base 43 and inserts the protrusion 54 into the square hole of the second mounting hole 43c. Next, as shown in FIG. 3, the worker inserts the screw 62 inserted into the round hole of the second mounting hole 43c from the first plate surface 41a side of the base 43 into the first insertion hole 55 and the second insertion hole 59 and forcibly screws the screw 62 into the holding portion 56 in the second insertion hole 59. This attaches the connection device holding member 501 to the base 43.

[0059] Next, the connecting rod 81 is held by the connecting device holding member 501. The worker presses the connecting rod 81 against the connecting device holding member 501 from the protruding piece 54 side. This widens the gap between the assembly portion 51 and the holding portion 56 of the connecting device holding member 501 against the biasing force of the biasing portion 60, widening the gap between the assembly board 52 and the holding board 57. When the worker further presses the connecting rod 81 toward the connecting device holding member 501, a portion of the connecting rod 81 is inserted into the holding recess 58a. Thereafter, the force of the widened biasing portion 60 returning the gap between the assembly portion 51 and the holding portion 56 to its original state. This narrows the gap between the assembly portion 51 and the holding portion 56, and the connecting rod 81 is held inside the holding recess 58a. At this time, the positioning edge 52 a comes into contact with the connecting rod 81 from the opening side of the holding recess 58 a, and the mounting board 52 is pressed against the connecting rod 81 .

[0060] 10, the connecting rod 81 is clamped by the connecting device holding member 501, and the connecting rod 81 is attached to the upper part of the form plate connecting member 41 by the connecting device holding member 501. The work of widening the gap between the assembly portion 51 and the holding portion 56 of the connecting device holding member 501 may be performed manually by an operator, instead of pressing the connecting rod 81 against the connecting device holding member 501. Alternatively, the connecting device holding member 501 may be attached to the lower second mounting hole 43c, and the connecting rod 81 may be attached to the lower part of the form plate connecting member 41.

[0061] As a result, the form plate connecting members 41 of the form supports 70 adjacent to each other in the laying direction H are connected to each other by the connecting device 80. The ends of adjacent connecting rods 81 in the laying direction H are overlapped with each other, and both ends are joined using a binding wire B. As a result, the form plate connecting members 41 of adjacent formwork supports 70 in the laying direction H are connected in the laying direction H by the connecting rods 81. Therefore, the connecting device holding member 501 can hold the connecting rods 81 in a state where they are aligned with the second plate surface 41b, which is the plate thickness surface of the formwork plate 23. The state where the connecting rods 81 are aligned with the second plate surface 41b of the formwork plate 23 means that the axis of the connecting rods 81 extends in parallel with the second plate surface 41b. In this case, the connecting rods 81 are separated from the second plate surface 41b by being held by the connecting device holding member 501; however, depending on the type of connecting device holding member 501, the connecting rods 81 may be in contact with the second plate surface 41b.

[0062] Next, as shown in Fig. 11, the worker inserts the support rebar 91 into one of the multiple erection sections 43a that is located one level above the lower holding member 50. The support rebar 91 is inserted into the erection sections 43a that face each other in the opposing direction. Then, both ends of the support rebar 91 are supported by the formplate connecting members 41 via the erection sections 43a. In other words, the support rebar 91 is supported by the pair of formplate connecting members 41 that form the form support 70.

[0063] At this time, the straight portion 32 and the support rebar 91 are arranged side by side in the second direction Y of the erection portion 43a through which the support rebar 91 is inserted. The dimension of the erection portion 43a in the second direction Y is slightly larger than the sum of the diameter of the straight portion 32 and the diameter of the support rebar 91. Therefore, even if the straight portion 32 overlaps the erection portion 43a, the support rebar 91 can be inserted into the erection portion 43a. Furthermore, because the straight portion 32 and the support rebar 91 can be arranged adjacent to each other in the laying direction H, the straight portion 32 and the support rebar 91 can be fastened together with a binding wire (not shown). This fastening can prevent the support rebar 91 from moving in the axial direction.

[0064] As described above, the form forming device 21 is formed by a plurality of form supports 70, a connection device 80, and support reinforcing bars 91 provided on each form support 70. When the pair of form walls W are formed by the form forming device 21, a form 20 consisting of the pair of form walls W is formed.

[0065] Next, as shown in Figure 12, workers lay the protective pipe 14 between a pair of formwork walls W. The protective pipe 14 is laid above the support rebars 91 installed on the formwork plate connecting members 41 of each formwork support 70. The protective pipe 14 is then supported from below by the support rebars 91 installed at equal intervals in the laying direction H. This completes the formation of a formwork installation structure. Therefore, the formwork installation structure has support rebars 91 installed on a pair of formwork plate connecting members 41 facing each other, below the protective pipe 14 installed above the joints 33 and crossing them in the opposing direction.

[0066] The formwork installation structure includes formwork plates 23 arranged facing each other across the protective pipe 14 in the radial direction, and multiple formwork formation auxiliary tools 30. The formwork installation structure also includes multiple formwork supports 70, each formed by assembling a pair of formwork plate connecting members 41 and one spacing member 31, spaced apart in the laying direction H of the protective pipe 14, with the protective pipe 14 positioned above the connecting portion 33 of the spacing member 31. In the formwork installation structure, the edge portions 23a of the formwork plates 23 are fitted into grooves 47 of the formwork plate connecting members 41 that are adjacent in the laying direction H and open facing each other. The formwork plates 23 are arranged facing each other across the protective pipe 14 in opposing directions perpendicular to the laying direction H, and multiple formwork plates 23 extending in the laying direction H form form walls W that face each other in the radial direction.

[0067] Next, the worker inserts the pipe floating prevention rebar 92 into one of the erection sections 43a located directly above the protective pipe 14, out of the multiple erection sections 43a located above the protective pipe 14, in each formwork support 70. Therefore, the erection section 43a is provided above the protective pipe 14 and in a position where the pipe floating prevention rebar 92 can be attached at multiple locations.

[0068] The pipe-floating prevention rebars 92 are inserted into the erection parts 43a that face each other in the facing direction. Both ends of the pipe-floating prevention rebars 92 are supported by the form plate connecting members 41 via the erection parts 43a and are attached to the form plate connecting members 41. Therefore, the form installation structure has the pipe-floating prevention rebars 92 that are erected on a pair of form plate connecting members 41 that face each other in the facing direction, and that cross over and in the facing direction above the protective pipes 14 that are laid above the connecting parts 33.

[0069] The pipe-floating prevention rebar 92 is supported by a pair of form plate connecting members 41 that form the form support 70. The straight section 32 and the pipe-floating prevention rebar 92 are arranged side by side in the second direction Y of the installation section 43a through which the pipe-floating prevention rebar 92 is inserted. The dimension of the installation section 43a in the second direction Y is slightly larger than the sum of the diameters of the straight section 32 and the pipe-floating prevention rebar 92. Therefore, even if the straight section 32 overlaps the installation section 43a, the pipe-floating prevention rebar 92 can be inserted into the installation section 43a. Furthermore, because the straight section 32 and the pipe-floating prevention rebar 92 can be arranged adjacent to each other in the laying direction H, the straight section 32 and the pipe-floating prevention rebar 92 can be fastened together with a binding wire (not shown). This fastening prevents the pipe-floating prevention rebar 92 from moving in the axial direction.

[0070] The protective pipe 14 is prevented from floating upward by a plurality of anti-pipe floating rebars 92 installed at equal intervals in the laying direction H. The erection section 43a through which the anti-pipe floating rebars 92 are inserted is changed as appropriate depending on the diameter of the protective pipe 14. In other words, the erection section 43a is provided in the formwork plate connecting member 41 above the protective pipe 14 and at a position where the anti-pipe floating rebars 92 can be attached at a plurality of locations.

[0071] Therefore, the formwork installation structure is installed on a pair of opposing formwork plate connecting members 41, and has anti-pipe floating rebars 92 that cross in opposing directions the protective pipes 14 laid above the connecting parts 33. With the above, the formwork installation structure is completed.

[0072] <Protective concrete manufacturing> With the formwork installation structure formed, workers pour concrete between the pair of formwork walls W, i.e., into the formwork 20. When pouring the concrete, the multiple pipe floating prevention rebars 92 prevent the protective pipes 14 from floating up due to the concrete pouring pressure. The spacing determining members 31, support rebars 91, pipe floating prevention rebars 92, and four retaining members 50 are embedded in the concrete. The protective pipes 14 sandwiched between the support rebars 91 and the pipe floating prevention rebars 92 are also embedded in the concrete. When the concrete hardens, protective concrete 13 is formed, and the protective pipes 14 are embedded in the protective concrete 13.

[0073] [Effects of the embodiment] According to the above embodiment, the following effects can be obtained. (1) The formwork formation auxiliary tool 30 has a spacing determination member 31 and a formwork plate connecting member 41. When each straight portion 32 of the spacing determination member 31 is attached to the formwork plate connecting member 41 by the mounting portion 49, the spacing determination member 31 can determine the spacing between a pair of opposing formwork plate connecting members 41. When the formwork plates 23 are fitted into the grooves 47 of each formwork plate connecting member 41 and assembled to the formwork plate connecting member 41, the spacing between the formwork plates 23 in the opposing direction can be determined by the formwork formation auxiliary tool 30. For example, compared to installing the formwork 20 while measuring the spacing between the formwork plates 23 in the opposing direction, the formwork formation auxiliary tool 30 makes it easier to install the formwork 20 using the formwork plates 23.

[0074] (2) The formwork plate connecting member 41 has grooves 47 on both sides of the base 43 in the second direction Y. Therefore, the formwork plate connecting member 41 can hold the formwork plates 23 on both sides of the formwork plate connecting member 41 in the second direction Y. Therefore, compared to, for example, a case where the formwork plate connecting member 41 holds the formwork plates 23 on only one side in the second direction Y, the installation efficiency of the formwork plates 23 using the formwork formation auxiliary tool 30 is improved.

[0075] (3) The formwork plate connecting members 41 are provided with first mounting holes 43b. The holding members 50 can be attached to the bases 43 using the first mounting holes 43b. The spacing determining members 31 can be attached to the formwork plate connecting members 41 by holding the straight portions 32 with the holding members 50. In other words, the spacing determining members 31 can be easily attached to the formwork plate connecting members 41 by means of the holding members 50, which are the mounting portions 49, and the first mounting holes 43b.

[0076] (4) The formwork plate connecting member 41 has two first mounting holes 43b arranged side by side in the first direction X. Therefore, two holding members 50 can be attached to the formwork plate connecting member 41. Therefore, the two holding members 50 can stably attach the straight portions 32 to the formwork plate connecting member 41, and can attach the straight portions 32 to the formwork plate connecting member 41 with their axes extending in the first direction X.

[0077] (5) The spacing determining members 31 are formed by bending reinforcing bars and shaping them into a U-shape. By using the spacing determining members 31, the pair of formwork plate connecting members 41 can be spaced apart to the length of the connecting portions 33. Therefore, the spacing between the pair of formwork plate connecting members 41 can be easily determined simply by using the spacing determining members 31, which can be easily formed from reinforcing bars.

[0078] (6) The formwork forming device 21 is formed by arranging a plurality of formwork supports 70 at intervals in the laying direction H and fitting formwork plates 23 into the grooves 47 of the formwork plate connecting members 41 that are adjacent in the laying direction H. As a result, the formwork plates 23 are arranged facing each other with the protective pipe 14 sandwiched therebetween, and the formwork walls W are formed by these formwork plates 23. Therefore, the formwork walls W, and ultimately the formwork 20, can be easily installed using the plurality of formwork supports 70 and the plurality of formwork plates 23.

[0079] (7) In the formwork forming device 21, the formwork plate connecting members 41 adjacent to each other in the laying direction H are connected in the laying direction H by the connecting device 80. Therefore, the formwork plate connecting members 41 of each formwork support 70 are prevented from being relatively displaced in the laying direction H by the connecting device 80. As a result, longitudinal displacement of the formwork plates 23 is prevented, and deformation of the formwork wall W can be prevented.

[0080] (8) The connection device 80 has a connecting rod 81 extending linearly and a connecting device holding member 501. When the connecting device holding member 501 is attached to the second plate surface 41b of the formwork plate connecting member 41, the connecting rod 81 can be assembled to the base 43 by the connecting device holding member 501 holding the connecting rod 81. As a result, the connecting rod 81 can be easily assembled to the base 43.

[0081] (9) Because the connecting device holding member 501 is attached to the second plate surface 41b of the formwork plate connecting member 41, the connecting rod 81 can be arranged on the outer surface side of the formwork plate 23. This prevents the connecting device 80 from causing a reduction in the amount of concrete poured into the formwork 20.

[0082] (10) Each form plate connecting member 41 of the form support 70 is provided with a plurality of erection portions 43a. The pipe-floating prevention rebars 92 can be inserted into the erection portions 43a located above the protective pipe 14 and erected on the form plate connecting members 41. These pipe-floating prevention rebars 92 can prevent the protective pipe 14 from floating up due to the concrete pouring pressure. As a result, the protective pipe 14 can be buried in the protective concrete 13 with a concrete layer of a predetermined thickness secured above the protective pipe 14.

[0083] (11) Furthermore, each form plate connecting member 41 of the form support 70 is provided with a plurality of erection portions 43a. The support rebars 91 can be inserted into the erection portions 43a located below the protective pipe 14, and erected on the form plate connecting members 41. By having the support rebars 91 support the protective pipe 14, protective concrete 13 can also be formed below the protective pipe 14, and therefore the entire circumferential direction of the protective pipe 14 can be buried in protective concrete 13.

[0084] (12) In the formwork installation structure, formwork plate connecting members 41 adjacent to each other in the laying direction H are connected to each other in the laying direction H by connecting rods 81. In addition, the ends of the connecting rods 81 adjacent to each other in the laying direction H are joined to each other by binding wires B. This allows multiple formwork plate connecting members 41 to be connected by the connecting rods 81.

[0085] (13) The formwork plate connecting member 41 is provided with a first mounting hole 43b and a second mounting hole 43c. When the holding member 50 is attached to the base 43 using the first mounting hole 43b, the spacing determining member 31 can be attached to the formwork plate connecting member 41 so that the straight portion 32 extends in the vertical direction. On the other hand, when the connection device holding member 501 is attached to the base 43 using the second mounting hole 43c, the connecting rod 81 can be attached to the formwork plate connecting member 41 so that it extends in the laying direction H. In other words, by selectively using the first mounting hole 43b and the second mounting hole 43c, the extending directions of the rod-shaped members can be changed when they are attached to the base 43.

[0086] (14) The form plate connecting member 41 is formed by shaping a single metal plate 42. For example, unlike when the second groove forming portion 45, which is separate from the base 43, is joined to the base 43 by welding or fastening to form the groove portion 47 together with the first groove forming portion 44, the form plate connecting member 41 having the groove portion 47 can be easily manufactured. Furthermore, since the strength of the second groove forming portion 45 can be increased, deformation of the second groove forming portion 45 can be suppressed when the form plate 23 is fitted into the groove portion 47.

[0087] (15) The erection sections 43a are elongated holes extending longitudinally in the laying direction H. Therefore, even if the positions of the form plate connecting members 41 in the formwork support 70 are shifted relative to each other in the opposing direction, the erection members 90 can be inserted into both erection sections 43a by utilizing the elongated holes of the erection sections 43a. Furthermore, the support rebars 91 or the pipe-floating prevention rebars 92 inserted into the erection sections 43a can be positioned adjacent to the straight sections 32 in the second direction Y of the erection sections 43a. The support rebars 91 and the straight sections 32 can be fastened together with a binding wire, and the pipe-floating prevention rebars 92 and the straight sections 32 can be fastened together with a binding wire. As a result, the support rebars 91 and the pipe-floating prevention rebars 92 can be prevented from moving in the axial direction.

[0088] (16) Each form plate connecting member 41 of the form support 70 is provided with a plurality of erection sections 43a. The erection section 43a through which the support rebars 91 and the pipe lift prevention rebars 92 are inserted can be selected depending on the outer diameter of the protective pipe 14 supported by the support rebars 91. Furthermore, the erection sections 43a are provided above the protective pipe 14 and at positions that allow the pipe lift prevention rebars 92 to be attached at a plurality of locations. Therefore, the insertion position of the pipe lift prevention rebars 92 can be adjusted depending on the outer diameter of the protective pipe 14, so that the pipe lift prevention rebars 92 can be suitably prevented from floating up. Furthermore, the height of the protective pipe 14 in the protective concrete 13 can also be adjusted.

[0089] [Example of change] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0090] The length of the connecting rod 81 can be changed as needed. In this case, the number of points where the ends of the connecting rod 81 are joined by the bind wire B may be zero or may be increased or decreased. The formwork forming device 21 does not have to have the connection device 80. In this case, the base 43 does not have to be provided with the second mounting hole 43c.

[0091] In the form installation structure and the form forming device 21, the pipe floating prevention rebar 92 may be omitted. In the form installation structure and the form forming device 21, the support reinforcing bars 91 may be omitted. Only one erection section 43a may be provided on the base 43 in order to erect only the support rebar 91 on the form support 70. Alternatively, only one erection section 43a may be provided on the base 43 in order to erect only the pipe floating prevention rebar 92 on the form support 70.

[0092] The spacing determining member 31 may be a rectangular frame having a pair of straight portions 32, one connecting portion 33 connecting one end of the pair of straight portions 32, and another connecting portion 33 connecting the other end of the pair of straight portions 32.

[0093] The length of the connecting portion 33 of the spacing determining member 31 can be changed as needed. By preparing multiple types of spacing determining members 31 with different lengths of the connecting portion 33, it is possible to set multiple types of spacing between the pair of formwork plate connecting members 41.

[0094] In the form plate connecting member 41 , the groove portion 47 may be formed together with the first groove forming portion 44 by joining the second groove forming portion 45 , which is a separate member from the base portion 43 , to the base portion 43 . The connecting device holding member 501 may be attached to the first plate surface 41 a of the form plate connecting member 41 to hold the connecting rod 81 in a state aligned with the first plate surface 41 a of the form plate connecting member 41 .

[0095] The holding member 50 and the connecting device holding member 501 may be joined to the base 43 in advance and integrated with the form plate connecting member 41 . Only one holding member 50 may be attached to the formwork plate connecting member 41, and the straight section 32 may be attached to the base 43 by the single holding member 50. In this case, the first mounting hole 43b for mounting the holding member 50 is changed depending on the position at which the straight section 32 is held. Therefore, a plurality of first mounting holes 43b are formed in the base 43 so that the holding member 50 can be mounted at different positions.

[0096] At least one of the spacing determining member 31, the connecting rod 81, the supporting rebar 91, and the pipe floating prevention rebar 92 may be a round or square metal bar other than a 3 / 4 rebar or a 4 / 8 rebar. The spacing member 31 may be formed into a U-shape by welding a straight metal rod. [Explanation of symbols]

[0097] W...formwork wall, 13...protective concrete, 14...protective pipe as pipe material, 20...formwork, 21...formwork forming device, 23...formwork plate, 23a...edge portion, 30...formwork forming auxiliary tool, 31...spacing determining member, 32...straight portion, 33...connecting portion, 41...formwork plate connecting member, 41a...first plate surface, 41b...second plate surface, 43...base, 43a...erection portion, 43b...first mounting hole constituting the mounting portion, 47...groove portion, 49...mounting portion, 50...retaining member constituting the mounting portion, 51...assembly portion, 56...retaining portion, 43b...first mounting hole, 70...formwork support, 80...connecting device, 81...connecting rod material, 90...erection member, 91...supporting rebar, 92...pipe floating prevention rebar, 501...retaining member for connecting device.

Claims

1. A formwork forming auxiliary tool used to assist in the installation of a formwork for protective concrete when forming protective concrete that protects buried pipe materials, The mold is used to install formwork plates that are arranged to face each other across the pipe material in the radial direction in order to form the formwork, a U-shaped spacing determining member having a pair of straight portions facing each other at a distance wider than the outer diameter of the pipe material and having a connecting portion connecting the ends of the pair of straight portions; a form plate connecting member having a plate-like base, a pair of grooves that open in opposite directions across the base and extend parallel to each other and into which edge portions of the form plate can be fitted, and an attachment portion that attaches the linear portion to the base; A formwork forming auxiliary tool that enables the spacing between the pair of formwork plate connecting members to be determined by the spacing determining member by attaching each of the pair of straight sections to the base using the mounting portion.

2. The spacing determining member is formed by bending a rod-shaped body into the U-shape, The mounting portion is A holding member that is a separate member from the formwork plate connecting member and holds the linear portion; a mounting hole provided in the base portion for mounting the holding member; The formwork forming auxiliary tool according to claim 1, wherein the mounting holes are formed in a plurality of positions so that the holding member can be mounted at different positions or so that a plurality of the holding members can be mounted.

3. A form forming device used to form a form for protective concrete when forming protective concrete that protects buried pipe materials, Form plates that form the formwork and are arranged to face each other with the pipe material sandwiched between them in the radial direction; A formwork forming auxiliary tool used to assist in the installation of the formwork, The formwork forming auxiliary tool is a U-shaped spacing determining member having a pair of straight portions facing each other at a distance wider than the outer diameter of the pipe material and having a connecting portion connecting the ends of the pair of straight portions; a form plate connecting member having a plate-like base, a pair of grooves that open in opposite directions across the base and extend parallel to each other and into which edge portions of the form plate can be fitted, and an attachment portion that attaches the linear portion to the base; A plurality of form supports formed by assembling a pair of the form plate connecting members and the spacing determining members are arranged spaced apart in the laying direction of the pipe material, The edge portions of the formwork boards are fitted into the groove portions that are adjacent to each other in the laying direction and open facing each other, The formwork plates are arranged in opposing directions perpendicular to the laying direction, sandwiching the pipe material therebetween, A formwork forming device characterized in that formwork walls opposing each other in the opposing direction are formed by a plurality of formwork plates extending in the laying direction.

4. The formwork forming apparatus according to claim 3 , wherein the formwork plate connecting members of the formwork supports adjacent to each other in the laying direction are connected in the laying direction by a connecting device.

5. The connection device is a rod-shaped connecting rod extending linearly in the laying direction; a connecting device holding member having a holding portion that holds the connecting rod and an assembly portion that is integral with the holding portion and that is assembled to the base, 5. The formwork forming apparatus according to claim 4, wherein the connecting device holding member is capable of holding the connecting rods in a state aligned with the plate surface of the formwork plate.

6. The base has an erection portion to which an erection member that is erected on the pair of formwork plate connecting members facing each other in the facing direction and that is embedded in the protective concrete can be attached, The formwork forming device according to any one of claims 3 to 5, wherein the erection section is provided at a position above the pipe material where the erection member can be attached.

7. The base has an erection portion to which an erection member that is erected on the pair of formwork plate connecting members facing each other in the facing direction and that is embedded in the protective concrete can be attached, A formwork forming device as described in any one of claims 3 to 5, wherein the erection section is located above the pipe material and in a position that allows the erection member to be attached at multiple locations.

8. A formwork installation structure for installing a formwork for forming protective concrete that protects buried pipe materials, Form plates that form the formwork and are arranged to face each other with the pipe material sandwiched between them in the radial direction; A formwork forming auxiliary tool used to assist in the installation of the formwork, The formwork forming auxiliary tool is a U-shaped spacing determining member having a pair of straight portions facing each other at a distance wider than the outer diameter of the pipe material and having a connecting portion connecting the ends of the pair of straight portions; a form plate connecting member having a plate-like base, a pair of grooves that open in opposite directions across the base and extend parallel to each other and into which edge portions of the form plate can be fitted, and an attachment portion that attaches the linear portion to the base; A plurality of form supports formed by assembling a pair of the form plate connecting members and the spacing determining members are arranged spaced apart in the laying direction of the pipe material, The pipe material is disposed above the plurality of connecting portions, The edge portions of the formwork plates are fitted into the grooves that are adjacent to each other in the laying direction and open facing each other, and the formwork plates are arranged to sandwich the pipe material in opposing directions perpendicular to the laying direction, A form installation structure characterized in that a pair of form walls extending in the laying direction are formed by a plurality of form plates extending in the laying direction.

9. A formwork installation structure as described in claim 8, which has an erection member that is erected on a pair of formwork plate connecting members that face each other in the opposing direction, and that is above the pipe material laid above the connecting portion and crosses the opposing direction.

10. The formwork installation structure described in claim 9, wherein the two formwork plate connecting members sandwiching one of the formwork plates are connected in the laying direction of the pipe material by a straight-extending rod-shaped connecting rod, and the end of the connecting rod is connected to the end of another connecting rod adjacent to the pipe material in the laying direction.

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