Concrete fixing joint member

Abstract

The present invention provides a concrete jointing member for stopping concrete that allows for easy confirmation of the concrete top surface position at joints when concrete is poured into multiple areas. [Solution] A concrete-stopping joint member for preventing concrete from flowing in when concrete is poured between two adjacent areas, comprising: a frame formed by integrating an angle material having a substantially L-shaped cross-section and a flat plate material via connecting members provided at both longitudinal ends to form a gap of a predetermined width between the angle material and the flat plate material; and concrete-stopping members that constitute a fence by being inserted in a plurality of parallel rows into the gap, wherein the angle material has through holes formed at at least both ends in the longitudinal direction of the fence, and level adjustment bolts that can adjust the vertical height of the frame are inserted into the through holes.

Description

Technical Field

[0001] The present invention relates to a concrete stop joint member.

Background Art

[0002] Since the amount of slab concrete that can be placed at one time is limited, when placing a large-area concrete slab, it is common to place the concrete in multiple times while making joints. For example, when placing concrete in multiple areas, a fence-shaped concrete stop joint member is used between the area to be placed this time and the area to be placed next to prevent the unhardened concrete from flowing into the next area.

[0003] For example, Patent Document 1 discloses a concrete joint spacer configured by storing a core sandwiched between porous elastic bodies inside a bag made of synthetic resin. This concrete joint spacer is said to be installable at various sites and easy to handle.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the concrete joint spacer disclosed in Patent Document 1 has a problem that the top position of the placed concrete is unknown and the workability is poor.

[0006] In view of the above circumstances, an object of the present invention is to provide a concrete stop joint member that can easily confirm the top position of the concrete at the joint when placing the concrete in a plurality of areas. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides a concrete jointing member for preventing concrete from flowing in when concrete is poured between two adjacent regions, comprising: a frame portion formed by integrating an angle material having a substantially L-shaped cross-section and a flat plate material via connecting members provided at both longitudinal ends to form a gap of a predetermined width between the angle material and the flat plate material; and concrete jointing members that constitute a fence by being inserted in a plurality of parallel arrangements into the gap, wherein through holes are formed in at least both ends of the fence in the longitudinal direction of the angle material, and level adjustment bolts that can adjust the vertical height of the frame portion are inserted into the through holes.

[0008] The gap portion may further include one or more deflection prevention materials that are inserted between adjacent concrete stoppers to prevent deflection of the frame portion.

[0009] The deflection prevention material includes a hooking portion that is hooked onto the angle material and an insertion portion that is inserted into the gap, and the width of the insertion portion may be the same as the design width of the gap. [Effects of the Invention]

[0010] According to the present invention, the position of the top surface of concrete can be easily confirmed at the joints when concrete is poured into multiple areas. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic diagram illustrating a concrete joint construction site. [Figure 2] This is a schematic enlarged view of the vicinity of the concrete joint member used for securing the concrete. [Figure 3] This is a schematic plan view of a concrete joint member used for securing concrete. [Figure 4] This is a schematic diagram illustrating the deflection prevention material. [Figure 5] This is a schematic diagram illustrating the connection of concrete joint members used for securing concrete. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described below with reference to the drawings. In this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant explanations will be omitted.

[0013] <Concrete joint construction site> Figure 1 is a schematic diagram illustrating a concrete joint construction site using the concrete joint member for concrete retention according to this embodiment. As shown in Figure 1, the concrete joint member for concrete retention according to this embodiment is placed at the boundary (so-called joint) between one area S1, which is an area where concrete U1 has already been poured, and the other area S2, which is adjacent to area S1 and where concrete will be poured in the future, in the ground G which is the construction site.

[0014] A structural element 10, which will be a reinforced concrete structure embedded inside the ground G after concrete is poured, is placed within the ground. The configuration of this structural element 10 is arbitrary; for example, it may include multiple main reinforcing bars 11 and multiple distribution reinforcing bars 13 perpendicular to them. Alternatively, as shown in Figure 1, the structural element 10 may have flow-preventing reinforcing bars 15 fixed by welding.

[0015] The concrete-stopping joint member 1 is constructed by integrating an angle member 20 having a substantially L-shaped cross-section and a flat plate member 30 so as to form a gap 40 of a predetermined width L1 between the angle member 20 and the flat plate member 30. These angle member 20 and flat plate member 30 are connected by a connecting member 90, which will be described later, and are integrated so that the upper ends of both coincide to form a frame portion 60. Here, it is preferable that the flat plate member 30 of the frame portion 60 faces region S1 and the angle member 20 faces region S2.

[0016] A concrete stopper 50 is inserted into a gap 40 between the angle member 20 and the flat plate member 30. The concrete stopper 50 is inserted such that its upper end protrudes above the frame portion 60 and its lower end contacts the ground G. The thickness of the concrete stopper 50 (the thickness in the X direction in the figure) is designed to match the designed width L1 of the gap 40. Although not shown in FIG. 1, a plurality of concrete stoppers 50 are inserted along the longitudinal direction of the frame portion 60, and a fence body extending in the longitudinal direction of the frame portion 60 is formed by these plurality of concrete stoppers 50.

[0017] The structure and configuration of the concrete stopper 50 are arbitrary. For example, as in Patent Document 1, a square-columnar one in which a core is embedded in a porous elastic body inside a bag made of synthetic resin may be used.

[0018] A leveling bolt 70 that is inserted into an insertion hole (insertion hole 93 described later) formed on the bottom surface of the angle member 20 and supports the frame portion 60 including the angle member 20 is attached to the angle member 20. The frame portion 60 is configured to be fixed at an arbitrary height in the vertical direction (the Z direction in the figure) of the leveling bolt 70.

[0019] Also, a clamp 75 is disposed in the region S2. This clamp 75 is connected to the leveling bolt 70 via a separator to a clamp 75 attached to a structural member in order to prevent the concrete stopping joint member 1 including the leveling bolt 70 from tilting due to the lateral pressure of the concrete.

[0020] <Configuration of the concrete stopping joint member> FIG. 2 is a schematic enlarged view including the vicinity of the concrete stopping joint member 1 according to the present embodiment. FIG. 3 is a schematic plan view of the concrete stopping joint member 1. Here, components having the same functional configuration as those in FIG. 1 are denoted by the same reference numerals and may not be described.

[0021] As shown in Fig. 2, the frame portion 60 of the concrete stop joint member 1 is supported by the leveling bolt 70 so that its upper end coincides with the upper surface position of the existing concrete U1 already placed in the region S1 (the position at a vertical height L2 from the ground G in the figure). The frame portion 60 is fixed by tightening, for example, both-side nuts 73 (73a, 73b) to the leveling bolt 70 at the position of the above-described vertical height L2.

[0022] As described above, the lower end portion of the leveling bolt 70 may be welded to the welding anchor 78. The welding anchor 78 is arranged in a state where a part thereof is buried in a predetermined position of the ground G in advance.

[0023] Also, as shown in Fig. 3, the angle member 20 and the flat plate member 30 are connected and integrated via the connecting member 90 at both longitudinal ends in a state where a gap portion 40 having a predetermined width L1 is formed, and are configured as the frame portion 60. The connecting member 90 may be fixed to the angle member 20 and the flat plate member 30 by welding, for example. A plurality of concrete stop members 50 (see the broken lines in Fig. 3) are continuously inserted into the gap portion 40 along the longitudinal direction in the frame portion 60 thus configured, and a fence body is formed.

[0024] Insertion holes 93 are formed in the bottom surface (a surface parallel to the XY plane) of the angle member 20, and the leveling bolt 70 is inserted into the insertion holes 93, and in this state, the frame portion 60 is fixed so as to be at a predetermined height position (the position of the vertical height L2). The number and arrangement of the formed insertion holes 93 are arbitrary, and it is sufficient that they are formed at least at both longitudinal ends of the angle member 20, and a plurality of them may be further formed therebetween.

[0025] As described above, multiple concrete stoppers 50 are inserted into the gap 40, but deflection prevention materials 100 may be placed between adjacent concrete stoppers 50. Figure 4 is a schematic diagram of the deflection prevention material 100. The number and arrangement of the deflection prevention materials 100 are arbitrary and should be arranged in a way that is optimal for preventing deflection between the angle material 20 and the flat plate material 30. As an example, as shown in Figure 3, the deflection prevention material 100 is placed between all adjacent concrete stoppers 50 in the concrete stoppers 50 that are inserted in a series into the gap 40, so that the concrete stoppers 50 can be inserted smoothly, and since the insertion holes 93 formed in the angle material 20 are weak, it is good to place the deflection prevention material 100 in the middle of the spacing between adjacent insertion holes 93.

[0026] As shown in Figure 4, the deflection prevention material 100 consists of a hooking portion 102 that can be hooked onto the angle material 20 and an insertion portion 104 that can be inserted into the gap portion 40. The hooking portion 102 may be, for example, an L-shaped angle member, and the insertion portion 104 may be, for example, a rectangular flat plate member. As shown in the figure, one side of the L-shaped angle member may be fixed to the short side of the rectangle by welding, the angle material 20 may be placed between the other side and the plate member, and the hooking portion 102 may be hooked onto the angle material 20.

[0027] The deflection prevention material 100 is placed to prevent deflection that may occur due to pressure on the gap 40 when the angle material 20 and the flat plate material 30 are connected and integrated at both ends in the longitudinal direction via the connecting member 90. Therefore, in order to reliably fill the gap 40, it is preferable that the width L3 of the insertion part 104, which is a rectangular flat plate member, be designed to be the same as (L1=L3) or approximately equal to (L1≒L3) the width L1 of the gap 40.

[0028] In addition, in the concrete-stopping joint member 1 configured as described above, it is preferable that during actual construction, the frame portion 60 (angle material 20 and flat plate material 30), the deflection prevention material 100, and the concrete-stopping material 50 be removed after concrete pouring and reused at the next construction site.

[0029] <Connecting concrete jointing members> In a concrete joint construction site using the concrete joint member for concrete retention according to this embodiment (see Figure 1), it is required to actually place multiple concrete joint members 1 at the boundary between areas S1 and S2. In such cases, it is required to connect the multiple concrete joint members 1 in a straight line.

[0030] Figure 5 is a schematic diagram illustrating the connection of concrete retaining joint members 1, with (a) showing adjacent concrete retaining joint members 1, 1 before connection and (b) showing them after connection. As shown in Figure 5, connecting members 110 are used to connect concrete retaining joint members 1.

[0031] As described above, an insertion hole 93 is formed in the bottom surface (the surface parallel to the XY plane) of the angle material 20 included in the concrete fixing joint member 1. Correspondingly, a bolt hole 112 is formed in the connecting member 110.

[0032] When connecting, as shown in Figure 5(a), concrete-stopping joint members 1, 1 are positioned so that the angle members 20 are adjacent to each other, and a connecting member 110 is placed across the two adjacent angle members 20. Then, as shown in Figure 5(b), the insertion holes 93 formed on the bottom surfaces of the adjacent angle members 20 are positioned so that they overlap with the bolt holes formed in the connecting member 110, and the two are bolted together with bolts 114. In this way, the adjacent concrete-stopping joint members 1, 1 are connected linearly by the connecting member 110. By inserting a concrete-stopping material 50 (not shown in Figure 5) into the gap 40 in this state, it is possible to prevent concrete from flowing into the joint over a wide area in an actual construction site. The connecting member 110 is removable and can be reused at other sites after construction.

[0033] <Effects and Effects> According to the concrete joint member 1 for stopping concrete in this embodiment, as shown in Figure 2, the frame portion 60 is fixed in a state where its upper end is adjusted in height by a level adjustment bolt 70 so that it coincides with the upper surface position of the existing concrete U1 already poured in area S1 (position at a vertical height L2 from the ground G). This makes it easy to confirm the top surface position of the concrete even from the area S2 side where concrete is to be poured, thereby improving work efficiency.

[0034] Furthermore, in the frame section 60, in addition to multiple concrete retaining materials 50, deflection prevention materials 100 are placed between each concrete retaining material 50 in the gap section 40. The concrete retaining joint member 1 (especially the frame section 60) may deflect due to factors such as pressure from the existing concrete U1 that has already been poured. However, by arranging such deflection prevention materials 100, the occurrence of deflection is suppressed, and construction accuracy and workability are further improved.

[0035] Although an example of an embodiment of the present invention has been described above, the present invention is not limited to the illustrated form. It will be clear to those skilled in the art that various modifications or variations can be conceived within the scope of the idea described in the claims, and these will naturally also fall within the technical scope of the present invention. [Industrial applicability]

[0036] This invention can be applied to concrete joint members used for securing concrete. [Explanation of symbols]

[0037] 1. Concrete fixing joint member 10…(reinforced concrete) structure 20…Angle material 30…Flat material 40... Gap 50... Concrete stopper 60...frame section 70...Level adjustment bolt 73... Nuts on both sides 90…Connecting member 93... Insertion hole 100... Anti-sagging material 110…Connecting member S1…(one of the) domains S2…(the other) domain U1…(existing) concrete

Claims

1. A concrete joint member for preventing concrete from flowing in when concrete is placed between two adjacent areas, A frame is formed by integrating an angle material having a roughly L-shaped cross-section and a flat plate material via connecting members provided at both ends in the longitudinal direction so as to form a gap of a predetermined width between the angle material and the flat plate material, The fence is formed by inserting multiple concrete stoppers in a row into the gap, The angle material has through holes formed at at least both ends in the longitudinal direction of the fence body. A concrete fixing joint member, characterized in that a level adjustment bolt capable of adjusting the vertical height of the frame portion is inserted into the aforementioned insertion hole.

2. The concrete joint member for concrete fastening according to claim 1, further comprising one or more deflection prevention materials inserted between adjacent concrete fastening materials in the gap to prevent deflection of the frame portion.

3. The deflection prevention material includes a hooking portion that hooks onto the angle material and an insertion portion that is inserted into the gap, The concrete joint member for fixing concrete according to claim 2, characterized in that the width of the insertion portion is the same as the design width of the gap portion.

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