Mold retainer

Abstract

To provide a mold frame holding tool capable of improving workability.SOLUTION: A mold frame holding tool 1 includes: a bottom plate 10; a first projection 15, a second projection 20, and a shaft-like member 26 extending toward a first side Z1 in a thickness direction Z of the bottom plate, respectively, from the bottom plate; and a projection 27 arranged on an end part on the first side in a thickness direction of the shaft-like member, wherein the first projection and the second projection are arranged side by side on the bottom plate with a space therebetween in a first creepage surface direction X, and the second projection and the shaft-like member are arranged side by side on the bottom plate with a space therebetween in a second creepage surface direction Y when directions along the bottom plate and intersectional to each other are designated as the first creepage surface direction and the second creepage surface direction, respectively.The projection projects in the direction of the first projection along the first creepage surface direction from the shaft-like member.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a formwork retainer.

Background Art

[0002] Conventionally, formwork retainers have been used to hold formwork (see, for example, Patent Documents 1 to 3). The formwork has a weir plate portion, an extension portion, and ribs. The formwork retainer has a main body piece (bottom plate), an inner locking piece (first protrusion), and an outer locking piece. The outer locking piece has an outer main body portion (second protrusion) and a guide portion (protrusion). The formwork is disposed on the main body piece between the inner locking piece and the outer locking piece. By engaging the locking end face of the guide portion with the outer edge of the rib of the formwork, the rib is prevented from coming off.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional formwork retainer, positioning in the direction along the main body piece (first surface direction) is performed by the outer main body portion, and positioning in the thickness direction of the main body piece is performed by the guide portion. When attaching and detaching the formwork to and from the formwork retainer, it is necessary to form the outer main body portion, which is the portion where the guide portion is supported, relatively soft so that the guide portion can easily move in the direction along the main body piece with respect to the rib. On the other hand, if the outer main body portion is relatively soft, it becomes difficult to position the formwork in the direction along the main body piece. From the viewpoints exemplified above, there is room for improvement in terms of workability in conventional formwork holders.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a formwork holder with high workability.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention proposes the following means. The formwork holder of the present invention includes a bottom plate, a first protrusion, a second protrusion, and a shaft member that respectively extend from the bottom plate toward the first side in the thickness direction of the bottom plate, and a protrusion provided at an end of the shaft member on the first side in the thickness direction. When a direction along the bottom plate and intersecting with each other is defined as a first surface direction and a second surface direction, the first protrusion and the second protrusion are arranged side by side on the bottom plate with a space therebetween in the first surface direction, the second protrusion and the shaft member are arranged side by side on the bottom plate with a space therebetween in the second surface direction, and the protrusion protrudes from the shaft member along the first surface direction and toward the first protrusion.

[0007] Generally, a formwork held by a formwork holder has a first plate piece extending in the thickness direction, a second plate piece extending from an end of the first plate piece on the second side in the thickness direction toward the first side in the first surface direction from the first protrusion to the second protrusion, and a third plate piece extending from the tip of the second plate piece toward the first side in the thickness direction. In the present invention, when the first protrusion and the second protrusion sandwich the first plate piece and the third plate piece of the formwork in the first surface direction, the first plate piece and the third plate piece can be positioned in the first surface direction. Then, the second plate piece of the formwork is supported by the bottom plate from the second side in the thickness direction with respect to the second plate piece, and the protrusion is locked to the third plate piece of the formwork from the first side in the thickness direction of the third plate piece, so that the second plate piece and the third plate piece of the formwork can be positioned in the thickness direction. In addition, since the second protrusion and the shaft-like member are arranged side by side with a space therebetween in the second surface direction, deformation of the shaft-like member is suppressed from being restricted by the second protrusion. Therefore, the protrusion provided on the shaft-like member can be easily moved in the first surface direction. From the above, the workability during construction using this formwork retainer can be improved.

[0008] Further, in the formwork retainer, the length of the second protrusion in the thickness direction may be shorter than the length of the first protrusion in the thickness direction. Generally, when removing the formwork from the foundation formed by the formwork, the formwork is removed while tilting the formwork so that the end portion on the first side in the thickness direction of the formwork is separated from the first protrusion in the first surface direction. In the present invention, the length of the second protrusion in the thickness direction, which is likely to cause an obstacle when removing the formwork from the foundation and the formwork retainer, is shorter than the length of the first protrusion in the thickness direction, and the first plate piece and the third plate piece of the formwork are positioned in the first surface direction mainly by the first protrusion, which is longer in the thickness direction among the first protrusion and the second protrusion. Thereby, while maintaining the positioning performance in the first surface direction, it is possible to easily remove the formwork from the foundation and the formwork retainer.

[0009] Further, in the formwork retainer, the length of the second protrusion in the thickness direction may be shorter than the length of the shaft-like member in the thickness direction. As described above, when removing the formwork from the foundation, the formwork is removed while tilting the formwork so that the end portion on the first side in the thickness direction of the formwork is separated from the first protrusion in the first surface direction. In the present invention, since the length of the second protrusion in the thickness direction, which is likely to cause an obstacle when removing the formwork from the foundation and the formwork retainer, is shorter than the length of the shaft-like member in the thickness direction, the shaft-like member and the protrusion can maintain dimensions that can correspond to a general formwork, and the formwork can be easily removed from the foundation and the formwork retainer.

[0010] Further, in the formwork retainer, two second protrusions may be provided, and the two second protrusions may be arranged so as to sandwich the shaft-like member in the second surface direction. In the present invention, two second protrusions arranged at intervals in the second surface direction can suppress the misalignment of the formwork around the axis along the thickness direction compared to the case where there is one second protrusion.

[0011] Further, in the formwork holder, two of the shaft-like members and the protrusions may be provided, and the two shaft-like members may be arranged so as to sandwich the second protrusion in the second surface direction. In the present invention, two protrusions arranged at intervals in the second surface direction can more reliably position the formwork with respect to the formwork holder in the thickness direction.

[0012] Further, in the formwork holder, the formwork holder may be made of synthetic resin, and a through hole may be formed at a position on the bottom plate where the protrusion is projected in the thickness direction. In the present invention, for example, when the formwork holder is manufactured by injection molding, the core or cavity of the mold moves through the through hole of the formwork holder manufactured in the mold. Therefore, a protrusion that becomes an undercut with respect to the moving direction of the core or cavity can be formed by injection molding.

[0013] Further, in the formwork holder, the through hole may be formed in the middle portion of the bottom plate in the second surface direction. In the present invention, it is possible to suppress a decrease in the strength of the bottom plate compared to the case where the through hole opens in the second surface direction on the bottom plate.

Advantages of the Invention

[0014] The formwork holder of the present invention can improve workability.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0016] Hereinafter, an embodiment of the formwork holder according to the present invention will be described with reference to FIGS. 1 to 12. As shown in FIG. 1, the formwork holder 1 of the present embodiment is used, for example, for constructing a solid foundation (foundation) 105 of a building 100. In FIG. 1, a state where the bottom plate portion 106 of the solid foundation 105 has been constructed is shown. The foundation may be a mat foundation. The solid foundation 105 is constructed on the disposable concrete 110. For example, in the disposable concrete 110, a plurality of reinforcing bars 112 are embedded in the concrete 111. Note that the reinforcing bars 112 may not be embedded in the disposable concrete 110.

[0017] Hereinafter, first, the configuration of the formwork holder 1 will be described. As shown in FIGS. 2 to 5, the formwork holder 1 has a bottom plate 10, a first protrusion 15, a second protrusion 20, and a holding claw 25. Note that FIG. 2 also shows a formwork 115 and the like, which will be described later. As shown in FIG. 3, the bottom plate 10 is formed in a plate shape that exhibits a rectangular shape that is long in a predetermined direction when viewed in the thickness direction Z of the bottom plate 10. The thickness of the bottom plate 10 (the length in the thickness direction Z) is preferably 3 mm or more and 5 mm or less. Hereinafter, a direction along the bottom plate 10 and orthogonal (intersecting) to each other is defined as a first surface direction X and a second surface direction Y. It is assumed that the first surface direction X is the predetermined direction. As shown in FIGS. 2 to 5, a first through hole (through hole) 10a, a second through hole 10b, and a protrusion 11 are formed in the bottom plate 10.

[0018] As shown in FIGS. 2 and 5, in the present embodiment, one first through hole 10a is formed in the bottom plate 10. The first through hole 10a is formed at a position corresponding to a protrusion 27 (described later) of the holding claw 30 at an end portion of the bottom plate 10 on the first side X1 in the first surface direction X (hereinafter, also simply referred to as the first side X1). Details of the position where the first through hole 10a is formed and the shape of the first through hole 10a will be described later. In the present embodiment, two second through holes 10b are formed in the bottom plate 10. Each second through hole 10b has a circular shape when viewed in the thickness direction Z. The two second through holes 10b are arranged at intervals from each other in the first surface direction X in a portion of the bottom plate 10 on the second side X2 (hereinafter, also simply referred to as the second side X2) that is opposite to the first side X1 in the first surface direction X. The first through hole 10a and the two second through holes 10b penetrate the bottom plate 10 in the thickness direction Z.

[0019] The protrusion 11 is an index indicating a position of a predetermined portion of the bottom plate 10 in the first surface direction X. As shown in FIGS. 2 and 5, the protrusion 11 is formed on a surface 10c of the bottom plate 10 that faces the first side Z1 in the thickness direction Z of the bottom plate 10 (hereinafter, also simply referred to as the first side Z1). In the present embodiment, two protrusions 11 are formed in a portion of the bottom plate 10 on the second side X2 that is further from the two second through holes 10b. Each rib 11 protrudes from the surface 10c toward the first side Z1 while extending in the second surface direction Y. The two ribs 11 are arranged at intervals from each other in the first surface direction X. Hereinafter, among the two ribs 11, the rib 11 on the first side X1 is also referred to as rib 11A. Among the two ribs 11, the rib 11 on the second side X2 is also referred to as rib 11B.

[0020] For example, the distance between rib 11A and the surface of the protrusion main body 16 of the first protrusion 15 facing the first side X1 described later is 60 mm. The distance between rib 11B and the surface of the protrusion main body 16 facing the first side X1 is 75 mm. For example, rib 11A is for a base width of 150 mm, and rib 11B is for a base width of 180 mm. Note that instead of the second through hole 10b, a depression may be formed in the surface 10c of the bottom plate 10.

[0021] As shown in FIGS. 2 and 5, the first protrusion 15 and the second protrusion 20 each extend from the bottom plate 10 toward the first side Z1. In the present embodiment, the formwork holder 1 includes one first protrusion 15. The first protrusion 15 is located at an intermediate portion of the bottom plate 10 in the first surface direction X and on the first side X1 of the two second through holes 10b. The first protrusion 15 is arranged at the center of the bottom plate 10 in the second surface direction Y. The first protrusion 15 has a protrusion main body 16 and a holding portion 17. The protrusion main body 16 is formed in a flat plate shape whose thickness direction is the first surface direction X. The protrusion main body 16 extends from the bottom plate 10 toward the first side Z1. The holding portion 17 is formed in a plate shape presenting a triangular shape when viewed in the second surface direction Y shown in FIG. 2. The holding portion 17 connects the surface of the protrusion main body 16 facing the second side X2 and the surface 10c of the bottom plate 10. The holding portion 17 prevents the protrusion main body 16 from falling to the second side X2.

[0022] As shown in FIG. 3, in the present embodiment, the formwork holder 1 includes two second protrusions 20. The two second protrusions 20 are disposed at the end of the bottom plate 10 on the first side X1 and in the portion of the first side X1 rather than the first protrusion 15. The two second protrusions 20 are arranged at intervals in the second surface direction Y. The two second protrusions 20 are disposed at both ends of the bottom plate 10 in the second surface direction Y. The first protrusion 15 and the two second protrusions 20 are arranged side by side on the bottom plate 10 at intervals in the first surface direction X. As shown in FIGS. 2 and 5, each second protrusion 20 has a protrusion body 21 and a holding portion 22. The protrusion body 21 is formed in a flat plate shape in which its thickness direction is the first surface direction X. The protrusion body 16 extends from the bottom plate 10 toward the first side Z1. As shown in FIG. 2, the holding portion 22 is formed in a plate shape that exhibits a triangular shape when viewed in the second surface direction Y. The holding portion 22 connects the surface of the protrusion body 21 facing the first side X1 and the surface 10c of the bottom plate 10. The holding portion 22 prevents the protrusion body 21 from falling to the first side X1.

[0023] As shown in FIGS. 2 and 5, the holding claw 25 has a shaft-like member 26 and a protrusion 27. The shaft-like member 26 is formed in a flat plate shape in which its thickness direction is the first surface direction X. The shaft-like member 26 extends from the bottom plate 10 toward the first side Z1. The shaft-like member 26 is disposed between the two second protrusions 20 and at the center of the bottom plate 10 in the second surface direction Y. That is, the two second protrusions 20 are arranged so as to sandwich the shaft-like member 26 in the second surface direction Y. The two second protrusions 20 and the shaft-like member 26 are arranged side by side on the bottom plate 10 at intervals in the second surface direction Y. As shown in FIG. 3, it is preferable that the surface 26a of the shaft-like member 26 facing the second side X2 and the surface 21a of each protrusion body 21 facing the second side X2 have the same position in the first surface direction X.

[0024] As shown in FIGS. 2 and 5, the protrusion 27 is provided at the end of the shaft-like member 26 on the first side Z1. The protrusion 27 protrudes from the shaft-like member 26 in a direction (second side X2) along the first surface direction X and toward the first protrusion 15. As shown in FIG. 2, the surface 27a of the protrusion 27 facing the second side X2 is inclined so as to gradually face the first side X1 as it faces the first side Z1. As shown in FIGS. 2 and 5, the first through hole 10a is formed at a position on the bottom plate 10 where the protrusion 27 is projected in the thickness direction Z. That is, the first through hole 10a is formed at a position overlapping the protrusion 27 on the bottom plate 10 when the protrusion 27 is viewed in the thickness direction Z. As shown in FIG. 2, the length of the second protrusion 20 in the thickness direction Z is shorter than the length of the first protrusion 15 in the thickness direction Z. The length of the second protrusion 20 in the thickness direction Z is shorter than the length of the shaft-like member 26 in the thickness direction Z.

[0025] The formwork holder 1 configured as described above is made of a synthetic resin such as polypropylene resin, polyethylene resin, or vinyl chloride resin. It is most preferable that the formwork holder 1 is formed of polypropylene resin. The formwork holder 1 is preferably formed of a recycled raw material obtained by recycling used synthetic resin through material recycling, for example. The first protrusion 15 and the second protrusion 20 are formed harder than the shaft-like member 26. For example, the formwork holder 1 is manufactured by injection molding using a mold. When manufacturing the formwork holder 1 by injection molding, for example, the line L1 shown in FIG. 2 becomes the parting line of the mold. For this reason, the protrusion 27 becomes an undercut with respect to the moving direction of the core or cavity of the mold (direction V orthogonal to the line L1 in FIG. 2). However, the formwork holder 1 can be formed by injection molding by moving the core or cavity through the first through hole 10a. Considering the draft of the core or cavity, the first through hole 10a preferably includes the shape projected in the thickness direction Z of the protrusion 27 and has a shape larger than that shape.

[0026] In this embodiment, the formwork holder 1 is arranged such that the second side Z2 faces downward. Note that the orientation in which the formwork holder 1 is arranged is not limited to this.

[0027] Next, the configuration of the formwork 115 supported by the formwork holder 1 will be described. As shown in FIG. 2, the formwork 115 has a first plate piece 116, a second plate piece 117, and a third plate piece 118. The first plate piece 116, the second plate piece 117, and the third plate piece 118 are each formed in a flat plate shape. The first plate piece 116 extends in the thickness direction Z. The second plate piece 117 extends from the end of the first plate piece 116 on the second side Z2 (hereinafter also simply referred to as the second side Z2) opposite to the first side Z1 in the thickness direction Z toward the first side X1. The third plate piece 118 extends from the tip of the second plate piece 117 toward the first side Z1.

[0028] In this embodiment, the length of the first plate piece 116 in the thickness direction Z is longer than the length of the third plate piece 118 in the thickness direction Z. For example, the first plate piece 116, the second plate piece 117, and the third plate piece 118 are integrally formed by bending a steel plate. As shown in FIG. 2, the bottom plate 10 of the formwork holder 1 supports the second plate piece 117 of the formwork 115 from the second side Z2 with respect to the second plate piece 117. The first protrusion 15 and the two second protrusions 20 of the formwork holder 1 sandwich the first plate piece 116 and the third plate piece 118 of the formwork 115 in the first along - surface direction X. At this time, the two second protrusions 20 are arranged to face the third plate piece 118. The protrusion 27 of the formwork holder 1 locks the third plate piece 118 of the formwork 115 from the first side Z1 with respect to the third plate piece 118. The protrusion 27 prevents the formwork 115 from lifting upward on the first side Z1. The formwork holder 1 is a so - called half - separator that supports one formwork 115.

[0029] Next, the process of constructing the monolithic foundation 105 of the building 100 using the formwork holder 1 as described above will be explained. As shown in Fig. 1, the formwork holder 1 is used not only for constructing the bottom plate portion 106 of the solid foundation 105 but also for constructing the rising portion 107 (to be described later) of the solid foundation 105. For example, when constructing the bottom plate portion 106, for example, an operator draws a line L3 by marking or the like at a position on the upper surface of the disposable concrete 110 where the reinforcing bar 112 is buried downward as shown in Figs. 1 and 3. As shown in Fig. 1, the reinforcing bar 120 is arranged within a predetermined range on the disposable concrete 110. The formwork holder 1 is arranged on the disposable concrete 110. For example, based on the specifications of the bottom plate portion 106 or the like, when viewed in the thickness direction Z, the protrusion 11B of the formwork holder 1 is overlapped with the line L3. A concrete nail 125 for concrete is driven into the disposable concrete 110 through the second through hole 10b of the formwork holder 1. In this way, a plurality of formwork holders 1 are fixed to a predetermined position of the disposable concrete 110 by the concrete nails 125.

[0030] Next, a plurality of formworks 115 are fixed to the plurality of formwork holders 1. Specifically, the first plate piece 116 and the third plate piece 118 of the formwork 115 are arranged between the first protrusion 15 and the two second protrusions 20 of the formwork holder 1. The second plate piece 117 of the formwork 115 is arranged on the bottom plate 10 of the formwork holder 1. The protrusion 27 of the formwork holder 1 is locked to the third plate piece 118 of the formwork 115 from the first side Z1 with respect to the third plate piece 118. By performing the above steps, a plurality of formworks 115 are fixed to the plurality of formwork holders 1.

[0031] At this time, as shown in Fig. 4, a gap S1 is formed in the thickness direction Z between the disposable concrete 110 and the formwork 115. The length of the gap S1 in the thickness direction Z corresponds to the thickness of the bottom plate 10. In order to prevent the concrete 121A (to be described later) from leaking outside the formwork 115 through the gap S1, it is preferable that the thickness of the bottom plate 10 is thin.

[0032] Next, as shown in FIG. 1, concrete 121A is poured between a plurality of formworks 115 to an extent that the formworks 115 are embedded. When the concrete 121A solidifies to become concrete 121, the chassis portion 106 is formed by the concrete 121 and the reinforcing bars 120.

[0033] Similarly, a line L4 is drawn at a position on the upper surface of the chassis portion 106 where the reinforcing bars 120 are embedded downward. Reinforcing bars (not shown) are arranged within a predetermined range on the chassis portion 106. A formwork holder 1A, which is another formwork holder 1, is arranged on the chassis portion 106. For example, based on the specifications of the rising portion of the mat foundation 105, etc., when viewed in the thickness direction Z, the ridge 11A of the formwork holder 1A is overlapped with the line L4. A plurality of formwork holders 1A are fixed to predetermined positions on the chassis portion 106 with concrete nails 125.

[0034] Next, the formworks 115 are fixed to the plurality of formwork holders 1A. Concrete is poured between the formwork 115 fixed to the formwork holder 1 and the formwork 115 fixed to the formwork holder 1A. When this concrete solidifies, as shown in FIG. 6, the rising portion 107 is formed. Through the above steps, the mat foundation 105 is constructed. When removing the formwork 115 from the mat foundation 105, as shown by the two-dot chain line L6 in FIG. 1, while tilting the formwork 115 so that the end portion of the formwork 115 on the first side Z1 is separated from the first protrusion 15 of the formwork holder 1 to which the formwork 115 is fixed in the first surface direction X, the formwork 115 is removed from the formwork holder 1. When the mat foundation 105 is constructed, for example, as shown in FIG. 6, the formwork holder 1 is embedded in the soil 126.

[0035] As described above, in the formwork retainer 1 of the present embodiment, when the first protrusion 15 and the two second protrusions 20 sandwich the first plate piece 116 and the third plate piece 118 of the formwork 115 in the first plane direction X, the first plate piece 116 and the third plate piece 118 can be positioned in the first plane direction X. Then, the second plate piece 117 of the formwork 115 is supported by the bottom plate 10 from the second side Z2 with respect to the second plate piece 117, and the protrusion 27 is locked to the third plate piece 118 of the formwork 115 from the first side Z1 of the third plate piece 118, so that the second plate piece 117 and the third plate piece 118 of the formwork 115 can be positioned in the thickness direction Z. Further, since the second protrusions 20 and the shaft-like members 26 are arranged side by side with a space therebetween in the second plane direction Y, the deformation of the shaft-like members 26 is suppressed from being restricted by the second protrusions 20. Therefore, the protrusion 27 provided on the shaft-like member 26 can be easily moved in the first plane direction X. From the above, the workability during construction using this formwork retainer 1 can be improved.

[0036] As shown by the two-dot chain line L6 in FIG. 1, while tilting the formwork 115, the formwork 115 is removed from the mass foundation 105 and the formwork retainer 1. When removing the formwork 115 from the mass foundation 105 and the formwork retainer 1, the length of the second protrusion 20 in the thickness direction Z, which is likely to be an obstacle, is shorter than the length of the first protrusion 15 in the thickness direction Z. The first plate piece 116 and the third plate piece 118 of the formwork 115 are positioned in the first plane direction X mainly by the first protrusion 15, which is longer than the second protrusion 20 in the thickness direction Z among the first protrusion 15 and the second protrusions 20. Thereby, while maintaining the positioning performance in the first plane direction X, it is possible to easily remove the formwork 115 from the mass foundation 105 and the formwork retainer 1. In addition, since the length of the second protrusion 20 in the thickness direction Z, which is likely to be an obstacle when removing the formwork 115 from the mass foundation 105 and the formwork retainer 1, is shorter than the length of the shaft-like member 26 in the thickness direction Z, the shaft-like member 26 and the protrusion 27 can maintain dimensions that can correspond to a general formwork 115 while making it easy to remove the formwork 115 from the mass foundation 105 and the formwork retainer 1.

[0037] The two second protrusions 20 are arranged so as to sandwich the shaft-shaped member 26 in the second tangential direction Y. The two second protrusions 20 arranged at intervals in the second tangential direction Y can suppress the positional deviation of the mold 115 around the axis along the thickness direction Z compared to the case where there is one second protrusion 20. The mold retainer 1 is made of synthetic resin, and a first through-hole 10a is formed at a position on the bottom plate 10 where the protrusion 27 is projected in the thickness direction Z. When the mold retainer 1 is manufactured by injection molding, the core or cavity of the mold moves through the first through-hole 10a of the mold retainer 1 manufactured in the mold. Therefore, the protrusion 27 that becomes an undercut with respect to the moving direction of the core or cavity can be formed by injection molding. Since one first through-hole 10a is formed in the bottom plate 10, it is possible to suppress a decrease in the strength of the bottom plate 10 compared to the case where two or more first through-holes 10a are formed in the bottom plate 10.

[0038] The configuration of the mold retainer 1 of the present embodiment can be variously modified as described below. As in the mold retainer 1A of the first modification shown in FIGS. 7 to 9, instead of the two second protrusions 20 and one holding claw 25 of the mold retainer 1 of the present embodiment, one second protrusion 20 and two holding claws 25 may be provided. That is, the mold retainer 1A of the first modification includes two shaft-shaped members 26 and two protrusions 27, respectively.

[0039] The two holding claws 25 are arranged at the end of the bottom plate 10 on the first side X1 and in a portion on the first side X1 rather than the first protrusion 15. The two holding claws 25 are arranged at intervals from each other in the second tangential direction Y. The two holding claws 25 are arranged at both ends of the bottom plate 10 in the second tangential direction Y. The first protrusion 15 and the two holding claws 25 are arranged side by side on the bottom plate 10 at intervals from each other in the first tangential direction X. Two first through-holes 10a are formed in the bottom plate 10 corresponding to the protrusions 27 of the two holding claws 25. Each first through-hole 10a opens in the second tangential direction Y.

[0040] The second protrusion 20 is between the two holding claws 25 and is disposed at the center of the bottom plate 10 in the second plane direction Y. That is, the two holding claws 25 (shaft-like members 26) are arranged so as to sandwich the second protrusion 20 in the second plane direction Y. The two holding claws 25 and the second protrusion 20 are arranged side by side on the bottom plate 10 with a space therebetween in the second plane direction Y.

[0041] In the formwork retainer 1A of the first modification configured as described above, the workability during construction using this formwork retainer 1A can be improved. Furthermore, the two protrusions 27 arranged with a space therebetween in the second plane direction Y can reliably position the formwork 115 with respect to the formwork retainer 1A in the thickness direction Z.

[0042] As in the formwork retainer 1B of the second modification shown in FIGS. 10 to 12, in the formwork retainer 1A of the first modification, the two first through holes 10a may be formed in the middle portion of the bottom plate 10 in the second plane direction Y. That is, among the two first through holes 10a arranged side by side in the second plane direction Y, for the first through hole 10a arranged on the first side in the second plane direction Y, this first through hole 10a does not open to the first side in the second plane direction Y, and there is a bottom plate 10 further on the first side in the second plane direction Y than this first through hole 10a. Similarly, for the first through hole 10a arranged on the second side opposite to the first side in the second plane direction Y among the two first through holes 10a arranged side by side in the second plane direction Y, this first through hole 10a does not open to the second side in the second plane direction Y, and there is a bottom plate 10 further on the second side in the second plane direction Y than this first through hole 10a.

[0043] In the formwork retainer 1B of the second modification configured as described above, the workability during construction using this formwork retainer 1B can be improved. Furthermore, it is possible to suppress a decrease in the strength of the bottom plate 10 compared to the case where the first through hole 10a opens in the second plane direction Y on the bottom plate 10.

[0044] As described above in detail with reference to the drawings for one embodiment of the present invention, the specific configuration is not limited to this embodiment, and includes configuration changes, combinations, deletions, etc. within the scope not departing from the gist of the present invention. For example, in the above embodiment, the length of the second protrusion 20 in the thickness direction Z may be equal to or greater than the length of the first protrusion 15 in the thickness direction Z. The length of the second protrusion 20 in the thickness direction Z may be equal to or greater than the length of the shaft-like member 26 in the thickness direction Z. The mold retainer may be a so-called separator that includes two sets of the first protrusion, the second protrusion, the shaft-like member, and the protrusion, and supports two opposing molds 115. When the mold retainer is not manufactured by injection molding, for example, when it is manufactured by cutting or the like, the first through-hole 10a may not be formed in the mold retainer. The second through-hole 10b and the protrusion 11 may not be formed in the bottom plate 10.

Description of Reference Numerals

[0045] 1, 1A, 1B Mold retainer 10 Bottom plate 10a First through-hole (through-hole) 15 First protrusion 20 Second protrusion 26 Shaft-like member 27 Protrusion X First surface direction X1 First side Y Second surface direction Z Thickness direction

Claims

1. A bottom plate, a first protrusion, a second protrusion, and a shaft member that respectively extend from the bottom plate toward a first side in the thickness direction of the bottom plate, a protrusion provided at an end of the shaft member on the first side in the thickness direction, and comprising, when a direction along the bottom plate and intersecting with each other is defined as a first surface direction and a second surface direction, the first protrusion and the second protrusion are arranged side by side on the bottom plate with a space therebetween in the first surface direction, the second protrusion and the shaft member are arranged side by side on the bottom plate with a space therebetween in the second surface direction, the protrusion protrudes from the shaft member in a direction along the first surface direction and toward the first protrusion, a formwork holder.

2. The formwork holder according to claim 1, wherein a length of the second protrusion in the thickness direction is shorter than a length of the first protrusion in the thickness direction.

3. The formwork holder according to claim 1 or 2, wherein a length of the second protrusion in the thickness direction is shorter than a length of the shaft member in the thickness direction.

4. Comprising two second protrusions, the two second protrusions are arranged so as to sandwich the shaft member in the second surface direction, the formwork holder according to any one of claims 1 to 3.

5. Comprising two shaft members and the protrusions respectively, the two shaft members are arranged so as to sandwich the second protrusion in the second surface direction, the formwork holder according to any one of claims 1 to 3.

6. The formwork holder is made of synthetic resin, a through hole is formed at a position on the bottom plate where the protrusion is projected in the thickness direction, the formwork holder according to any one of claims 1 to 5.

7. The formwork holder according to claim 6, wherein the through hole is formed at an intermediate portion of the bottom plate in the second surface direction.

Images