Concrete block formwork

Abstract

To provide a mold for concrete blocks that eliminates the need for large facilities such as cranes in the assembly and disassembly of the mold, and that enables a significant reduction in the time required for assembling and disassembling the mold.SOLUTION: A mold 100 for a concrete block for manufacturing a concrete block 200, comprises: a bottom plate 10; side walls 20 rotatably connected to inner positions of an outer peripheral edge of the bottom plate 10 via hinge portions 30; demolding stoppers 40 that restrict a rotation angle of the side walls 20 during demolding; and engaging portions 70 for connection tools 80 that connect a first side wall 21 and a third side wall 23, the first and third side walls 21 and 23 being among the side walls 20 and having at least a pair of opposing flat positions.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to forms for concrete blocks. [Background technology]

[0002] The structure of a concrete block formwork for manufacturing concrete blocks is known. For example, a configuration such as that disclosed in Patent Document 1 (JP-A-10-249831) is known as a concrete block formwork.

[0003] The concrete block formwork disclosed in Patent Document 1 is constructed by combining a pair of side frames and a partition frame, so by adjusting the placement distance of the side frames and partition frames according to the size of the concrete block, it is possible to produce multiple types of concrete blocks using a single concrete block formwork. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 10-249831 A (Claim 1, paragraphs 0014-0018, Figures 1-7, etc.) Summary of the Invention [Problem to be solved by the invention]

[0005] The concrete block formwork disclosed in Patent Document 1 has a configuration in which the side frames and partition frames are simply arranged upright on the bottom plate, so the side frames and partition frames are completely separated when assembling or dismantling the formwork. This requires large equipment such as a crane to assemble or dismantle the formwork, which poses the problem of long assembly and dismantling times. [Means for solving the problem]

[0006] The present invention is intended to solve the above problems, and its purpose is to provide a formwork for concrete blocks that eliminates the need for large equipment such as cranes when assembling and dismantling the formwork, and that can significantly reduce the time required for assembling and dismantling the formwork.

[0007] As a result of intensive research by the inventors to solve the above problems, the inventors have come up with the following configuration: That is, the present invention is a formwork for concrete blocks for manufacturing concrete blocks, comprising a bottom plate, side walls rotatably connected to the bottom plate via hinges along the outer periphery of the bottom plate at positions inside the outer periphery, a demolding stopper that restricts the rotation angle of the side walls when demolded, and a connector locking portion for locking a connector that connects at least a pair of side walls that face each other in plan view. the connector locking portion is an inverted U-shaped member provided at a widthwise intermediate position of the upper end of the outer wall surface of each of the side walls, at least one pair of which has a planar position facing each other; the connector includes a connector body and a chain; a first hook provided on one end of the chain and a second hook provided on the front connector body are each locked to the inverted U-shaped connector locking portion; and a hanging material to be embedded in a concrete block is hung from the longitudinal intermediate portion of the chain so that only a portion of the hanging material protrudes from the top surface of the concrete block. This is a formwork for concrete blocks.

[0008] This eliminates the need for large equipment such as cranes when assembling and dismantling formwork, and makes it possible to significantly reduce the time required for assembling and dismantling formwork.

[0009] It is also preferable that the demolding stopper includes a first demolding stopper that connects adjacent side walls in the circumferential direction among the side walls, and a second demolding stopper that is arranged on the upper surface of the bottom plate.

[0010] This allows the rotation angle of the side wall to be adjusted to an appropriate angle when removing from the mold.

[0011] It is also preferable that a forming stopper be provided to prevent the side walls from shifting outward during concrete pouring.

[0012] This prevents the concrete formwork from collapsing due to the weight of the concrete when pouring or curing the concrete. [Effects of the Invention]

[0013] By adopting the concrete block formwork configuration of the present invention, it is possible to restrict the rotation angle of the side walls that can rotate relative to the bottom plate when removing the formwork, which eliminates the need for large equipment such as cranes when assembling and dismantling the formwork, and significantly reduces the time required for assembling and dismantling the formwork. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of the concrete block formwork of this embodiment when being removed from the formwork. FIG. [Figure 2] FIG. 2 is a perspective view showing the state of the concrete block form shown in FIG. 1 during concrete pouring. [Figure 3] FIG. 1 is a perspective view showing a state in which a hanger is hung from a concrete block formwork during concrete pouring. [Figure 4] FIG. 4 is a perspective view showing a state in which concrete has been poured into the concrete block form of FIG. 3. [Figure 5] 1 is a perspective view showing a state in which a concrete block is being removed from a concrete block formwork. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of a concrete block formwork 100 (hereinafter referred to as formwork 100) according to the present invention will be specifically described below with reference to the drawings. In this embodiment, formwork 100 for manufacturing a rectangular parallelepiped concrete block 200 is illustrated, but formwork 100 according to the present invention can also be used to manufacture polygonal columnar concrete blocks 200, such as triangular columns. As shown in FIG. 1, formwork 100 in this embodiment includes a bottom plate 10, a plurality of side walls 20, a hinge portion 30, a first demolding stopper 40, a second demolding stopper 50, a molding stopper 60, a connector locking portion 70, and a connector 80, such as a lever block (registered trademark) or a lever hoist.

[0016] The bottom plate 10 in this embodiment is formed as a rectangular plate larger than the bottom surface of the concrete block 200 to be molded. A plurality of side walls 20 (a first side wall 21, a second side wall 22, a third side wall 23, and a fourth side wall 24) are erected along the outer periphery of the bottom plate 10. In this embodiment, the first side wall 21, the third side wall 23, and the second side wall 22, the fourth side wall 24, which face each other, are formed to have the same width and height, respectively, and the width dimensions of the second side wall 22 and the fourth side wall 24 are formed to be larger than the width dimensions of the first side wall 21 and the third side wall 23. The top surfaces of the first side wall 21 to the fourth side wall 24 at positions inside the outer periphery of the bottom plate 10 are rotatably connected to the outer surfaces of the lower ends of the first side wall 21 to the fourth side wall 24 by hinge portions 30. Two hinge portions 30 are provided on each of the first side wall 21 to the fourth side wall 24. In this embodiment, a scaffolding member 25 formed in an inverted U-shape is provided in the middle of the height direction of the second side wall 22. Furthermore, facing wood 26 is attached to the inner surfaces of the lower and upper edges of the first side wall 21 to the fourth side wall 24.

[0017] Stays 42 are attached to both sides of the first side wall 21 to the fourth side wall 24 in the width direction. The stays 42 attached to the first side wall 21 and the second side wall 22, the second side wall 22 and the third side wall 23, the third side wall 23 and the fourth side wall 24, and the fourth side wall 24 and the first side wall 21, which are adjacent in the circumferential direction of the outer periphery when the bottom plate 10 is viewed from above, are connected by a restraining body 44. These stays 42 and the restraining body 44 constitute a first demolding stopper 40 that restricts the rotation angle of the side wall 20 (first side wall 21 to the fourth side wall 24) during demolding. The first demolding stopper 40 can appropriately adjust the rotation angle of the first side wall 21 to the fourth side wall 24 during demolding, etc., by adjusting the connection length of the restraining body 44 relative to the stay 42.

[0018] In addition, a second demolding stopper 50 formed in a right-angled triangular plate is attached to the upper surface of the bottom plate 10 corresponding to the first side wall 21, the fourth side wall 24, and the third side wall 23 in this embodiment. The second demolding stopper 50 is fixed in an upright position between the two hinge portions 30 with the hypotenuse of the right-angled triangular plate facing the first side wall 21, the fourth side wall 24, and the third side wall 23. When the hypotenuse of the right-angled triangular plate abuts against the first side wall 21, the fourth side wall 24, and the third side wall 23 during demolding, the rotation angle of the right-angled triangular plate relative to the upper surface of the bottom plate 10 can be directly restricted by the first demolding stopper 40 attached to the first side wall 21 and the third side wall 23. The rotation angle of the second side wall 22 is restricted by the first demolding stopper 40 attached to the first side wall 21 and the third side wall 23.

[0019] The outward rotation angle of the upper edges of the first side wall 21 to the fourth side wall 24 during demolding or the like can also be restricted by changing the shape of the second demolding stopper 50. Although not shown, it is also possible to employ a configuration in which the second demolding stopper 50 is disposed on the second side wall 22. When the first demolding stopper 40 is disposed, it is sufficient that the second demolding stopper 50 is disposed on at least one pair of opposing side walls 20.

[0020] In this embodiment, molding stoppers 60 formed as L-shaped plates are attached to the upper edge portions of both widthwise ends of the second side wall 22 and the fourth side wall 24. A first surface 62 of the molding stoppers 60 is attached to the inner surfaces of the second side wall 22 and the fourth side wall 24 by welding or the like. The molding stoppers 60 are attached in a state where their second surfaces 64 are aligned with the outer surfaces of the first side wall 21 and the third side wall 23 when the first side wall 21 and the third side wall 23 stand perpendicular to the upper surface of the bottom plate 10. Such a molding stopper 60 can prevent outward positional shift due to the weight of concrete C of one side wall (first side wall 21 and third side wall 23) relative to the other side wall (second side wall 22 and fourth side wall 24) between two circumferentially adjacent side walls of the bottom plate 10 (first side wall 21 and third side wall 23 relative to second side wall 22, and third side wall 23 and first side wall 21 relative to fourth side wall 24) while concrete is being poured into the formwork space 110 (including during curing).

[0021] Furthermore, an inverted U-shaped connector locking portion 70 is provided at the middle of the width direction on the upper end of the outer surface of each of the first to fourth side walls 21 to 24. A first hook 84 provided at one end of a chain 82 of a connector 80 and a second hook 86 attached to the body of the connector 80 are locked to a pair of opposing connector locking portions 70 (here, the connector locking portions 70 of the second side wall 22 and the fourth side wall 24). When the chain 82 is tensioned by operating the connector 80, the first side wall 21 and the third side wall 23 are sandwiched between the second side wall 22 and the fourth side wall 24 in the width direction, as shown in FIG. 2 . This maintains the first side wall 21 and the third side wall 23 in an upright position perpendicular to the upper surface of the bottom plate 10, and also maintains the second side wall 22 and the fourth side wall 24 in an upright position perpendicular to the upper surface of the bottom plate 10, thereby ensuring that the formwork space 110 is properly formed and maintained.

[0022] With the appropriate form space 110 thus formed in the formwork 100, a hanger 210 for a concrete block 200 is suspended from the longitudinal midpoint of the connector 80, as shown in Figure 3. The hanger 210 and connector 80 are preferably positioned using a wire or the like (not shown). The form space 110 is then filled with concrete C, and as shown in Figure 4, the hanger 210 is embedded in the concrete C with only a portion of it protruding from the top surface of the concrete C. After the concrete C has cured appropriately, the connector 80 is operated to release the tension on the chain 82, and the concrete block 200 is demolded.

[0023] 5, the formwork 100 that has been removed from the concrete block 200 has its upper edges rotated outward around the lower edges of the first to fourth side walls 21 to 24, which act as rotation axes, so that it is separated from the side periphery of the concrete block 200, but the bottom plate 10 and the first to fourth side walls 21 to 24 remain connected by the hinge portions 30. Therefore, when the connector 80 is removed from the connector locking portion 70, the space above the concrete block 200 becomes clear, and the concrete block 200 can be immediately removed by heavy machinery such as a crane without having to move the side walls 20 of the formwork 100 to another location.

[0024] As described above, by using the formwork 100 of this embodiment, the time required to dismantle the formwork 100 can be significantly reduced. Furthermore, when removing the concrete block 200 from the formwork 100, the assembled state of the formwork 100 is maintained by the hinge portion 30, the first demolding stopper 40, and the second demolding stopper 50. As a result, after the concrete block 200 is removed from the formwork 100, the formwork 100 can be manually assembled back into the molding state. As described above, since the formwork 100 of this embodiment can be manually assembled into the molding state and changed into the demolding state, heavy machinery such as a crane can be conveniently used only to transport the concrete block 200.

[0025] Although the formwork 100 in this embodiment has been described above, the formwork 100 according to the present invention is not limited to the above embodiment. For example, in the above embodiment, the formwork 100 according to the present invention is exemplified in which the first demolding stopper 40 and the second demolding stopper 50 are provided as the demolding stoppers, but it is sufficient that at least one of the first demolding stopper 40 and the second demolding stopper 50 is provided as the demolding stopper.

[0026] Furthermore, in the above-described embodiment, the connector 80 is connected to the connector locking portions 70 of the second side wall 22 and the fourth side wall 24, which face each other in a plan view, as an example; however, the present invention is not limited to this example. Alternatively, the connector 80 may be connected to the connector locking portions 70 of the first side wall 21 and the third side wall 23, which face each other in a plan view, and to the connector locking portions 70 of the second side wall 22 and the fourth side wall 24. The connector locking portions 70 may be attached to either the first side wall 21 and the third side wall 23 or the second side wall 22 and the fourth side wall 24. In the above-described embodiment, a lever block (registered trademark) or a lever hoist is used as the connector 80, as an example; however, the connector 80 is not limited to this example; a turnbuckle may also be used as the connector 80. In short, the specific configuration of the connector 80 is not particularly limited as long as it can maintain the horizontal distance between the first side wall 21 and the third side wall 23, and the second side wall 22 and the fourth side wall 24, which face each other when the formwork 100 is viewed in a plane.

[0027] Furthermore, it is also possible to adopt a form in which the above-described embodiments and the modified examples described in each embodiment are appropriately combined. [Explanation of symbols]

[0028] 10: Bottom plate 20: Side wall 21: First side wall, 22: Second side wall, 23: Third side wall, 24: Fourth side wall, 25: Scaffolding material, 26: Wood 30: Hinge part 40: First demolding stopper 42: Stay, 44: Restraint 50: Second demolding stopper 60: Molding stopper 62: 1st side, 64: 2nd side 70: Locking part for coupling tool 80: Connector 82: Chain, 84: 1st hook, 86: 2nd hook 100: Formwork (formwork for concrete blocks) 200: Concrete block 210: Hanging material C: Concrete

Claims

1. A concrete block form for manufacturing concrete blocks, The bottom plate and a side wall rotatably connected to an inner position of the outer periphery of the bottom plate via a hinge portion along the outer periphery of the bottom plate; a stopper for demolding that restricts the rotation angle of the side wall when demolding; and a connector locking portion for locking a connector that connects at least a pair of the side walls that face each other in plan view, among the side walls; The connector locking portion is an inverted U-shaped member provided at a widthwise intermediate position of an upper end portion of an outer wall surface of each of the side walls, the upper end portion being located at a planar position of at least a pair of opposing outer wall surfaces, The connecting tool includes a connecting tool main body and a chain, and a first hook provided on one end side of the chain and a second hook provided on the front connecting tool main body are each engaged with the connecting tool engaging portion having an inverted U-shape, This concrete block formwork is characterized in that the hanging material to be embedded in the concrete block is hung from the middle of the chain in the longitudinal direction so that only a part of it protrudes from the top surface of the concrete block.

2. The formwork for concrete blocks as described in claim 1, characterized in that the stoppers for use during demolding include a first stopper for use during demolding that connects adjacent side walls of the side walls in the circumferential direction, and a second stopper for use during demolding arranged on the upper surface of the bottom plate.

3. 3. A formwork for concrete blocks according to claim 1, further comprising stoppers for use during forming, for restricting outward displacement of said side walls during concrete pouring.

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