JP2022025969A - Joint structure, and manufacturing method of joint structure member - Google Patents

Abstract

To achieve simple construction, a shortened construction period, improved reliability of a water proof function, and improved design property.SOLUTION: A joint structure comprises: first to fourth members solidified by a hydration reaction; a joint space among the first to fourth members; a first sheet member having a first embedded portion embedded in the first member and a first extension portion extending from the first member to the joint space; a second sheet member having a second embedded portion embedded in the second member and a second extension portion extending from the second member to the joint space; a third sheet member having a third embedded portion embedded in the third member and a third extension portion extending from the third member to the joint space; and a fourth sheet member having a fourth embedded portion embedded in the fourth member and a fourth extension portion extending from the fourth member to the joint space. The first extension portion is in contact with the second extension portion and the third extension portion. The fourth extension portion is in contact with the second extension portion and the third extension portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joint structure and a method for manufacturing a member for the joint structure.

For example, when the joint portion of the outer wall material or the interior material needs to have waterproof performance, the joint portion is filled with an amorphous sealing material to make it watertight. However, the sealing material needs to be applied after a predetermined curing period until the concrete or the like of the base material dries, and the waterproof function is not completely exhibited until the sealing material is hardened. Furthermore, a curing period was required when painting the sealing material. In addition, external scaffolding may be required for sealing work. As described above, it was difficult to shorten the construction period as well as the labor required for the construction.

Therefore, there has been proposed a joint structure in which a synthetic resin or synthetic rubber-based film or sheet is provided on a concrete member as a joint waterproof material so that portions extending from the concrete member are brought into contact with each other in the joint space (for example, Patent Document 1). reference). This simplifies construction, shortens the construction period, and improves the reliability of waterproofing.

Japanese Unexamined Patent Publication No. 2019-190126

However, even in the above-mentioned joint structure, in the joints having intersections (for example, T-shaped joints and cross-shaped joints), there is a possibility that the designability may deteriorate at the intersections. Further, due to the occurrence of a gap, it becomes necessary to construct a sealing material, which may increase the process and the construction period.

The present invention has been made in view of such circumstances, and an object thereof is to simplify the construction, shorten the construction period, improve the reliability of the waterproof function, and improve the design at the joint where the intersection is located. It is to improve.

In order to achieve such an object, the joint structure of the present invention has a first member consolidated by the hydration reaction, a second member consolidated by the hydration reaction, and a third member consolidated by the hydration reaction. A joint structure including a member, a fourth member consolidated by a hydration reaction, and a joint space between the first member, the second member, the third member, and the fourth member. A first sheet member having a first embedded portion fixed to the first member by the hydration reaction and embedded, and a first extending portion extending from the first member to the joint space. A second sheet member having a second embedded portion fixed to the second member by the hydration reaction and embedded, and a second extending portion extending from the second member to the joint space, and the said. A third sheet member having a third embedded portion fixed to and embedded in the third member by the hydration reaction, and a third extending portion extending from the third member to the joint space, and the first. A fourth sheet member having a fourth embedded portion fixed and embedded in the four members by the hydration reaction and a fourth extending portion extending from the fourth member to the joint space is provided. The first extension portion of the first sheet member comes into contact with the second extension portion of the second sheet member and the third extension portion of the third sheet member, and the fourth sheet member said. The fourth extension portion is in contact with the second extension portion of the second sheet member and the third extension portion of the third sheet member.

According to such a joint structure, it is possible to improve the reliability of the design and the waterproof function in the cross-shaped joint. In addition, the construction can be simplified and the construction period can be shortened.

In such a joint structure, it is desirable that the first extending portion of the first sheet member and the fourth extending portion of the fourth sheet member are also in contact with each other.

According to such a joint structure, the reliability of the waterproof function can be further enhanced.

In such a joint structure, it is desirable that there is a portion in the joint space where the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion overlap. ..

According to such a joint structure, water stopping property can be enhanced.

In such a joint structure, each sheet member has a surface layer sheet and a back layer sheet provided on the back surface side of the surface layer sheet, and the corner portions of the back layer sheet are cut out. It is desirable that the surface layer sheet and the back layer sheet of each extension portion are bent so that the surface layer sheets are in contact with each other.

According to such a joint structure, construction can be simplified.

In such a joint structure, each sheet member has a surface layer sheet and a back layer sheet provided on the back surface side of the surface layer sheet, respectively, and the positions of the surface layer sheet and the back layer sheet are displaced from each other. It is desirable that the surface sheets of each sheet member are in contact with each other and the back layer sheets are in contact with each other.

According to such a joint structure, the intersection of the joints can be formed smoothly, and the design can be enhanced. Moreover, the water stopping property can be enhanced.

In such a joint structure, the sheet members lined up in a predetermined direction have their respective extension portions overlapped and in contact with each other, and the sheet members lined up in a direction intersecting the predetermined direction have their respective extension portions bent. It is desirable that they are in contact with each other.

According to such a joint structure, the sheet members can be arranged without gaps at the intersections of the joints.

In such a joint structure, it is desirable that each sheet member is a resin sheet, and the portions where the extending portions are in contact with each other are welded by a welding agent.

According to such a joint structure, the sheet members can be easily and surely joined.

Further, in order to achieve such an object, the joint structure of the present invention is consolidated by the hydration reaction with the first member consolidated by the hydration reaction and the second member consolidated by the hydration reaction. It is a joint structure including a third member, a joint space between the first member, the second member, and the third member, and is fixed and embedded in the first member by the hydration reaction. A first sheet member having a first embedded portion and a first extending portion extending from the first member to the joint space was fixed and embedded in the second member by the hydration reaction. A second sheet member having a second embedded portion and a second extending portion extending from the second member to the joint space, and a second embedded portion fixed to the third member by the hydration reaction. A third sheet member having the three buried portions, the third extending portion extending from the third member to the joint space, and the first extending portion and the first extending portion of the first sheet member. The second extension portion of the two-seat member is in contact with the second extension portion, and the third extension portion of the third sheet member is the first extension portion of the first sheet member and the second extension portion of the second sheet member. It is characterized in that it is in contact with the extension portion.

According to such a joint structure, it is possible to simplify the construction, shorten the construction period, improve the reliability of the waterproof function, and improve the design of the T-shaped joint.

Further, in order to achieve such an object, the method for manufacturing the joint structure member of the present invention is to fix the cement-based composition member solidified by the hydration reaction to the cement-based composition member by the hydration reaction. A method for manufacturing a joint structure member comprising a buried portion buried in a cement-based composition and an extending portion extending from the cement-based composition member, wherein the inner side surface of the formwork is provided. A sheet member arranging step of providing an edge cutting material on the other surface of the extension portion while facing one surface of the extension portion, and the formwork while maintaining the embedded portion inside the formwork. A casting step of driving the cement-based composition into the cement, a demolding step of removing the mold after the cement-based composition is solidified, and removing the edge cutting material to form the extending portion with the cement. It is characterized by having an extension step of extending from a system composition member.

According to such a joint structure, it is possible to manufacture a joint structure member capable of simplifying construction, shortening the construction period, improving the reliability of the waterproof function, and improving the design.

A method for manufacturing such a joint structure member, further comprising a reinforcing bar arranging step of arranging reinforcing bars inside the formwork before the sheet member arranging step, and in the sheet member arranging step, the sheet member. It is desirable to fix the buried portion of the above to the reinforcing bar.

According to such a method for manufacturing a joint structure member, a sheet member (embedded portion) can be maintained inside the formwork.

In such a method for manufacturing a joint structure member, a vinyl chloride steel plate is welded to the embedded portion of the sheet member, and the reinforcing bar and the embedded portion are fixed by connecting the reinforcing bar and the vinyl chloride steel plate. It is desirable to do this by welding.

According to such a method for manufacturing a joint structure member, the sheet member (buried portion) can be reliably fixed to the reinforcing bar.

According to the present invention, it is possible to simplify the construction, shorten the construction period, improve the reliability of the waterproof function, and improve the design.

It is a front view of the joint structure of 1st Embodiment. 2A to 2D are schematic explanatory views showing a method of manufacturing the first concrete member 10. FIG. 3A is a schematic perspective view showing a method of fixing the first sheet member 12 to the formwork 60. FIG. 3B is a cross-sectional view of a fixed portion between the first sheet member 12 and the formwork 60. 4A to 4C are explanatory views showing an example of installation of the first sheet member 12 on a corner portion (corner portion) of the first concrete member 10. 5A to 5C are explanatory views of a construction method of the joint structure of the first embodiment. 6A to 6C are explanatory views of a construction method of the joint structure of the second embodiment. 7A and 7B are explanatory views of a construction method of the joint structure of the third embodiment. 8A to 8D are explanatory views of the construction method of the joint structure of the fourth embodiment. It is a figure which shows an example of the case where the joint space 50 is T-shaped. 10A and 10B are schematic explanatory views in the case of contact with an aluminum sash. It is a schematic explanatory drawing in the case of contacting with a vinyl chloride resin sash. It is sectional drawing which shows the example of joining (welding) of a vinyl chloride resin sash 80 and a 1st sheet member 12.

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

=== First Embodiment ===
<< About joint structure >>
FIG. 1 is a front view of the joint structure of the first embodiment.
The joint structure shown in FIG. 1 includes a first concrete member 10 (corresponding to the first member), a second concrete member 20 (corresponding to the second member), a third concrete member 30 (corresponding to the third member), and a fourth concrete. It includes a member 40 (corresponding to a fourth member) and a joint space 50. In the present embodiment, each of these concrete members is used for a wall (outer wall) of a building, and is provided between indoors and outdoors. In FIG. 1, a vertical direction and a horizontal direction intersecting the vertical direction are defined. The vertical direction is, for example, the vertical direction, and the horizontal direction is, for example, the horizontal direction. In addition, the direction that intersects the vertical and horizontal directions (direction perpendicular to the paper surface) is the thickness direction, one side of the thickness direction (for example, the outdoor side) is the front side, and the opposite side (for example, the indoor side) is the back side. do.

Each concrete member (first concrete member 10 to fourth concrete member 40) shown in FIG. 1 is a panel-shaped member having a rectangular planar shape. Specifically, each concrete member of the present embodiment (FIG. 1) has a rectangular shape having a long side (vertical direction) of about 4.4 m and a short side (horizontal direction) of about 2.2 m. Is. As shown in FIGS. 1A and 1B, the first concrete member 10 and the second concrete member 20 are arranged laterally across the joint space 50. Similarly, the third concrete member 30 and the fourth concrete member 40 are arranged laterally across the joint space 50. Further, the first concrete member 10 and the third concrete member 30 are arranged in the vertical direction across the joint space 50. Similarly, the second concrete member 20 and the fourth concrete member 40 are arranged in the vertical direction across the joint space 50.

The first concrete member 10 (corresponding to the first member) is a cement-based composition member solidified by a hydration reaction between cement and water. The first concrete member 10 of the present embodiment is reinforced concrete in which reinforcing bars 14 (see FIGS. 2 and 3) are arranged inside, and is manufactured by a PC (precast concrete) method. The PC method is a method in which concrete products (members) are manufactured in advance at a factory and then transported to the site for installation. The first concrete member 10 of the present embodiment is provided with the first sheet member 12.

The first sheet member 12 is a sheet-like member having water stopping property. As the first sheet member 12, a synthetic resin-based or synthetic rubber-based film or sheet can be used. Examples of the synthetic resin type include vinyl chloride type, acrylic type, ABS type (acrylonitol / butadiene / styrene copolymer), TPE type (thermoplastic elastomer), and fluororesin (for example, PFA: ethylene tetrafluoride / perfluoroalkoxyethylene). Copolymer) and the like can be used. In the present embodiment, a vinyl chloride-based synthetic resin (hereinafter, also referred to as a vinyl chloride resin) is used as the first sheet member 12. The same applies to the seat members (second seat member 22, third seat member 32, fourth seat member 42) provided on other concrete members.

The optimum sheet thickness can be selected according to the joint width and joint installation depth. The applicable range of the sheet thickness is, for example, 0.5 to 7 mm, and in the present embodiment, a sheet having a thickness of 2 mm is used.

The first sheet member 12 includes a buried portion 12a (corresponding to the first buried portion) fixed to the first concrete member 10 by a hydration reaction and embedded, and an extended portion 12b extending from the first concrete member 10. It has (corresponding to the first extension part). The buried portion 12a and the extending portion 12b are formed so as to surround the periphery of the first concrete member 10 (that is, they are also formed at the corners of the first concrete member 10). The method for manufacturing the first concrete member 10 will be described later.

The second concrete member 20, the third concrete member 30, and the fourth concrete member 40 are also members (cement-based composition members) similar to the first concrete member 10.

The second concrete member 20 is provided with a second sheet member 22. The second sheet member 22 has a buried portion 22a (corresponding to the second buried portion) fixed to the second concrete member 20 by a hydration reaction and embedded, and an extended portion 22b extending from the second concrete member 20 (corresponding to the second buried portion). It has (corresponding to the second extension part).

Further, the third concrete member 30 is provided with a third sheet member 32. The third sheet member 32 has a buried portion 32a (corresponding to the third buried portion) fixed to and buried in the third concrete member 30 by a hydration reaction, and an extended portion 32b extending from the third concrete member 30 (corresponding to the third buried portion). It has (corresponding to the third extension part).

Further, the fourth concrete member 40 is provided with a fourth seat member 42. The fourth sheet member 42 has a buried portion 42a (corresponding to the fourth buried portion) fixed to the fourth concrete member 40 by a hydration reaction and embedded, and an extended portion 42b extending from the fourth concrete member 40 (corresponding to the fourth buried portion). It has (corresponding to the fourth extension part).

The joint space 50 is a space provided between each of the four concrete members (first concrete member 10, second concrete member 20, third concrete member 30, fourth concrete member 40). The joint space 50 of the present embodiment is a cross-shaped joint in which a portion along the vertical direction and a portion along the horizontal direction intersect in a cross shape. In the joint space 50, the extension portion 12b of the first seat member 12, the extension portion 22b of the second seat member 22, the extension portion 32b of the third seat member 32, the extension portion 42b of the fourth seat member 42, and the like. Are each extended and joined to each other by welding or the like. Welding is a joining method in which a resin or metal is melted and joined. The welding method of this embodiment will be described later.

<< About the construction method of joint structure >>
<Manufacturing of concrete members>
Before the explanation of the construction method of the joint structure, the manufacturing method of the concrete member (corresponding to the member for the joint structure) of the present embodiment will be described. Here, a method for manufacturing the first concrete member 10 will be described, but the second concrete member 20, the third concrete member 30, and the fourth concrete member 40 can also be manufactured in the same manner.

2A to 2D are schematic explanatory views showing an example of a method for manufacturing the first concrete member 10. Further, FIG. 3A is a schematic perspective view showing an example of a method of fixing the first sheet member 12 to the formwork 60, and FIG. 3B is a cross-sectional view of a fixed portion between the first sheet member 12 and the formwork 60. be.

First, as shown in FIGS. 2A and 3A, the reinforcing bar 14 is arranged inside the formwork 60, and the first sheet member 12 is fixed to the inner side surface of the formwork 60. In the present embodiment, as shown in FIGS. 3A and 3B, a vinyl chloride steel plate 13 (hereinafter, also referred to as a vinyl chloride steel plate 13) is provided on one side of a portion of the first sheet member 12 to be a buried portion 12a. The vinyl chloride steel sheet 13 is a resin decorative steel sheet in which a core material (steel plate) is coated with a polyvinyl chloride resin. The first sheet member 12 (vinyl chloride resin) and the vinyl chloride steel plate 13 are previously integrated by welding. The surface of the vinyl chloride steel sheet 13 on the side not welded to the first sheet member 12 (the surface on the side facing the reinforcing bar 14) may not be provided with the polyvinyl chloride resin.

As shown in FIGS. 3A and 3B, the first sheet member 12 is bent into an L shape, and the vinyl chloride steel plate 13 is welded to the reinforcing bar 14. It is sufficient that the first sheet member 12 is fixed to the reinforcing bar 14, and it is not necessary to weld all the reinforcing bars 14 and the vinyl chloride steel plate 13 at positions overlapping with the vinyl chloride steel plate 13. For example, it may be welded every other plurality, or it may be bonded or fixed with tape or wire instead of welding.

Further, the L-shaped other side portion (the portion that becomes the extending portion 12b) is fixed to the inner side surface of the mold 60 with the double-sided tape 16. Further, on the surface opposite to the double-sided tape 16 (the surface of the first sheet member 12), a release paper 18 (corresponding to the edge cutting material) for cutting the edge so as not to adhere to the concrete is provided.

Next, as shown in FIG. 2B, concrete (cement-based composition) is placed (drived) in the formwork 60. Then, after the concrete is solidified by the hydration reaction between the cement and water, the mold 60 is removed from the mold as shown in FIG. 2C. The first sheet member 12 is integrated with concrete.

Then, as shown in FIG. 2D, the double-sided tape 16 and the release paper 18 are removed from the first sheet member 12, and the L-shaped bent portion of the first sheet member 12 is linearly extended.

In this way, the first concrete member 10 provided with the first sheet member 12 can be manufactured. Further, in the first sheet member 12, an embedded portion 12a (a portion fixed to the reinforcing bar 14) fixed and embedded in the first concrete member 10 by a hydration reaction, and an extension extending from the first concrete member 10 The protrusion 12b is formed.

In the present embodiment, the vinyl chloride steel plate 13 is provided at the portion of the first sheet member 12 that becomes the buried portion 12a, and the vinyl chloride steel plate 13 is welded to the reinforcing bar 14. However, the method of fixing the first sheet member 12 Is not limited to this. For example, a hole may be provided at an appropriate position of the first sheet member 12 (a portion to be the buried portion 12a), and the first sheet member 12 may be tightly connected to the reinforcing bar 14 with a wire or the like. Further, in the present embodiment, the first sheet member 12 (the portion serving as the extending portion 12b) and the inner side surface of the formwork 60 are fixed by the double-sided tape 16, but the double-sided tape 16 may not be used.

4A to 4C are explanatory views showing an installation example of the first sheet member 12 at the corner portion (corner portion) of the first concrete member 10.

In FIG. 4A, a first sheet member 12 and a first sheet member 12'are provided along the side of the first concrete member 10, and a part of the two sheet members is overlapped at a corner portion ( Welded).

In FIG. 4B, the first sheet member 12 and the first sheet member 12'are provided as in FIG. 4A, and all the two sheets are overlapped at the corner portion.

In FIG. 4C, a sheet member (first sheet member 12 ″ having a shape corresponding to the shape of the corner portion is provided at the corner portion, and two linear sheet members (first sheet member 12, first sheet member 12) are provided. ´) and the seat member at the corner (first seat member 12 ″) are overlapped with each other.

The method of installing the sheet member on the concrete member is not limited to the above. For example, using a sheet member having a shape (L-shaped) corresponding to two sides (short side and long side) sandwiching a corner of the concrete member, two L-shaped sheet members are arranged around the concrete member. You may do so. Alternatively, one square-shaped sheet member may be arranged around the concrete member. Further, the method for manufacturing the concrete member is not limited to the above, and may be manufactured by another method. For example, even if the side portion of the formwork 60 is configured to be divisible at a predetermined position in the height direction, a sheet member is sandwiched between them (a part of the sheet member is arranged in the formwork), and concrete is poured inside. good.

<Construction method of joint structure>
5A to 5C are explanatory views of a construction method of the joint structure of the first embodiment. In FIGS. 5A to 5C, a reduced model having a square planar shape is used as each concrete member.

First, as shown in FIG. 5A, the third concrete member 30 and the fourth concrete member 40 are arranged in the horizontal direction, and the extending portion 32b of the third sheet member 32 of the third concrete member 30 and the fourth concrete member 40 are arranged. The extending portion 42b of the fourth sheet member 42 is overlapped. Here, the sheet members are stacked so that the back surface of the extension portion 32b is in contact with the front surface of the extension portion 42b, but the reverse may be performed. Then, the overlapped extension portion 32b and the extension portion 42b are welded together. Specifically, a welding agent is applied between the extending portion 32b and the extending portion 42b with a brush (not shown) impregnated with a special welding agent. As a result, the extension portion 32b to which the welding agent is applied and the portion of the extension portion 42b come into contact with each other in a melted state, and then are cured to be welded. By applying the welding agent in this way, the third sheet member 32 and the fourth sheet member 42 can be easily and surely joined (welded). As the welding agent for the sheet member (PVC sheet), for example, a Sanroid DN welding agent (manufactured by Sumi-Sheet Waterproof Co., Ltd.) can be used.

Next, as shown in FIG. 5B, the second concrete member 20 is arranged so as to be vertically aligned with the fourth concrete member 40. Then, the extending portion 22b of the second sheet member 22 of the second concrete member 20 is overlapped with the extending portion 42b of the fourth sheet member 42 of the fourth concrete member 40 and the extending portion 32b of the third concrete member 30. And weld.

Next, as shown in FIG. 5C, the first concrete member 10 is arranged so as to be vertically aligned with the third concrete member 30 and horizontally aligned with the second concrete member 20. Then, the extending portion 12b of the first sheet member 12 of the first concrete member 10, the extending portion 22b of the second sheet member 22 of the second concrete member 20, the extending portion 32b of the third concrete member 30, and the extending portion 32b are used. The fourth concrete member 40 is superposed on the extending portion 42b of the fourth sheet member 42 and welded.

As a result, a cross-shaped joint space 50 is formed between the first concrete member 10, the second concrete member 20, the third concrete member 30, and the fourth concrete member 40. Sheet members are arranged without gaps in the joint space 50. In particular, at the cross-shaped intersecting portion, the extending portions of the first seat member 12, the second seat member 22, the third seat member 32, and the fourth seat member 42 overlap each other in the thickness direction. Thereby, the water stopping property can be enhanced. The overlapping order of the first seat member 12, the second seat member 22, the third seat member 32, and the fourth seat member 42 is not limited to this example, and may be any order. Further, in the above-mentioned example, the extending portion 12b of the first sheet member 12 and the extending portion 42b of the fourth sheet member 42 may not come into contact with each other, but the position of the sheet is shifted (or the size of the sheet is adjusted). Then, the extending portion 12b and the extending portion 42b may be brought into contact (welding). This makes it possible to further improve the reliability of the waterproof function.

As described above, in the present embodiment, by providing the sheet members in advance in each concrete member, the waterproofness of the cross-shaped joint space 50 can be easily ensured by overlapping the extending portions of the sheet members. .. Therefore, since it is not necessary to install a sealing material to prevent a gap from being generated, it is possible to simplify the construction, shorten the construction period, improve the reliability of the waterproof function, and improve the design.

In the present embodiment, the sheet members are welded to each other while the concrete members are arranged, but the sheet members may be welded to each other after the arrangement of the concrete members is completed.

=== Second embodiment ===
6A to 6C are explanatory views of a construction method of the joint structure of the second embodiment. Also in the second embodiment, the same reduced model as in FIG. 5 is used.

In the second embodiment, as shown in FIG. 6A, the first sheet member 12 of the first concrete member 10 has a two-layer structure. Specifically, the first sheet member 12 (buried portion 12a and extending portion 12b) is configured such that the surface layer sheet 12U and the back layer sheet 12L are overlapped in the thickness direction. A notch is formed at the corner of the back layer sheet 12L. Here, the surface layer sheet 12U is formed thinner than the back layer sheet 12L, but the thickness is not limited to this, and the same thickness may be used. Further, the sheet members of other concrete members (second concrete member 20, third concrete member 30, fourth concrete member 40) have the same configuration.

Next, the sheet members (extending portions) of each of these concrete members are bent toward the back side and arranged side by side as shown in FIG. 6B. The back layer sheet of the sheet member has notches formed at the corners, and the surface layer sheet on the notches is thin, so that the corners are easily bent.

Thereby, as shown in FIG. 6C, each concrete member can be arranged. In this example, as shown in FIG. 6C, the surface sheets of the sheet members are in contact with each other at the center of the intersection of the joint spaces 50. Then, a welding agent is applied between the sheet members with a brush or the like. As a result, the contacted surface sheets are joined by welding.

Also in this second embodiment, the same effect as that of the first embodiment can be obtained. In addition, the construction can be further simplified.

=== Third Embodiment ===
7A and 7B are explanatory views of a construction method of the joint structure of the third embodiment. Also in the third embodiment, the same reduced model as in FIG. 5 is used. In the side views of FIGS. 7A and 7B, the illustration of each concrete member is omitted (only the sheet member is shown).

In the third embodiment, the sheet members of each concrete member have a two-layer structure, and as shown in the figure, the two-layer sheet members are arranged in a staggered manner. For example, the first sheet member 12 (embedded portion 12a and extending portion 12b) of the first concrete member 10 is composed of two layers, a surface layer sheet 12U and a back layer sheet 12L, and the surface layer sheet 12U and the back layer sheet. 12L are overlapped so as to be offset in the vertical direction and the horizontal direction.

Similarly, the second sheet member 22 (embedded portion 22a and extending portion 22b) of the second concrete member 20 is composed of two layers, a surface layer sheet 22U and a back layer sheet 22L, and the surface layer sheet 22U and the back layer. The sheets 22L are stacked so as to be offset in the vertical direction and the horizontal direction. Further, the third sheet member 32 (embedded portion 32a and extending portion 32b) of the third concrete member 30 is composed of two layers, a surface layer sheet 32U and a back layer sheet 32L, and the surface layer sheet 32U and the back layer sheet. 32L are overlapped so as to be offset in the vertical direction and the horizontal direction. Further, the fourth sheet member 42 (embedded portion 42a and extending portion 42b) of the fourth concrete member 40 is composed of two layers, a surface layer sheet 42U and a back layer sheet 42L, and the surface layer sheet 42U and the back layer sheet. 42L are overlapped so as to be offset in the vertical direction and the horizontal direction. The direction and amount of displacement of the front layer sheet and the back layer sheet of each concrete member are the same.

First, as shown in FIG. 7A, the surface sheet 12U of the first concrete member 10, the surface sheet 22U of the second concrete member, and the back layer sheet 12L of the first concrete member 10 and the back layer sheet 22L of the second concrete member. Weld the overlapping portion of the surface layer sheet 22U and the back layer sheet 12L while abutting the concrete. The butt portion may or may not be welded.

As a result, as shown in the figure, a laminated body in which the first concrete member 10 and the second concrete member 20 are integrated is formed. The laminated body is formed in the same manner for the third concrete member 30 and the fourth concrete member 40.

Next, as shown in FIG. 7B, the laminated body of the first concrete member 10 and the second concrete member 20 and the laminated body of the third concrete member 30 and the fourth concrete member 40 are bonded together. That is, the surface layer sheet 32U of the third sheet member 32 and the surface layer sheet 42U of the fourth sheet member 42 are welded to the back layer sheet 12L of the first sheet member 12 and the back layer sheet 22L of the second sheet member 22.

As described above, each concrete member of the third embodiment is provided with the sheet members in a plurality of layers (here, two layers), and the positions of the laminated sheets are displaced in the vertical direction and the horizontal direction. Thereby, in the third embodiment, it is possible to prevent a step from being formed on the sheet surface even at the intersecting portion of the joint space 50 (it can be formed smoothly). Therefore, the design can be further enhanced. Further, since the positions of the two layers of sheets are offset from each other, the water stopping property can be improved. In the present embodiment, the sheet members of each concrete member are formed in two layers, but the present invention is not limited to this, and the number of layers may be three or more.

=== Fourth Embodiment ===
8A to 8D are explanatory views of the construction method of the joint structure of the fourth embodiment. Also in the fourth embodiment, the same reduced model as in FIG. 5 is used. In addition, in the side view of FIGS. 8A and 8B and FIG. 8C, the illustration of each concrete member is omitted. Further, in FIG. 8C, each sheet member is virtually shown in a sheet shape.

First, as shown in FIG. 8A, the first concrete member 10 and the third concrete member 30 are arranged in the vertical direction, and the extending portion 12b of the first sheet member 12 of the first concrete member 10 and the third concrete member 30 are arranged. The extending portion 32b of the third sheet member 32 is overlapped in the thickness direction. Here, as shown in the figure, the back surface of the extension portion 32b is overlapped so as to be in contact with the front surface of the extension portion 12b. Then, the overlapped extension portion 12b and the extension portion 22b are welded together.

Next, as shown in FIG. 8B, the second concrete member 20 and the fourth concrete member 40 are arranged in the vertical direction, and the extending portion 22b of the second sheet member 22 of the second concrete member 20 and the fourth concrete member 40 are arranged. The extending portion 42b of the fourth sheet member 42 is overlapped in the thickness direction. Here, as shown in the figure, the back surface of the extension portion 22b is overlapped so as to be in contact with the front surface of the extension portion 32b. Then, the overlapped extension portion 32b and the extension portion 42b are welded together.

Next, as shown in FIG. 8C, the laminated body formed in FIG. 8A and the laminated body formed in FIG. 8B are arranged side by side, and the ends of the opposing sheet members (extended portions) are arranged in the thickness direction. Bend towards the back of the. Then, in the vertical direction, the laminated bodies are brought into contact with each other and welded so that the end of the second sheet member 22 (extended portion 22b) and the end of the third sheet member 32 (extended portion 32b) are at the same position.

As a result, as shown in FIG. 8D, a joint structure having a cross-shaped joint space 50 is formed. Also in this embodiment, each sheet member can be arranged without a gap in the joint space 50. Therefore, the same effect as that of the above-described embodiment can be obtained.

=== About other embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. It goes without saying that the present invention can be modified and improved without departing from the spirit thereof, and the present invention includes an equivalent thereof. In particular, even the embodiments described below are included in the present invention.

<About joining sheet members>
In the above-described embodiment, the sheet members (extended portions) are welded to each other with a welding agent, but the present invention is not limited to this, and for example, they may be joined with an adhesive.

<About joint structure>
In the above-described embodiment, the joint space 50 is a cross-shaped joint, but the joint space is not limited to this, and may be, for example, a T-shaped joint.

FIG. 9 is a diagram showing an example of a case where the joint space 50 is T-shaped. In FIG. 9, the same reference numerals are given to the parts having the same configuration as those in FIG. 1, and the description thereof will be omitted.

The joint structure shown in FIG. 9 includes a first concrete member 10, a second concrete member 20, a third concrete member 30, and a joint space 50.

The first concrete member 10 and the second concrete member 20 are arranged side by side in the vertical direction. The third concrete member 30 is arranged on the lateral side of the first concrete member 10 and the second concrete member 20 so that the position in the vertical direction is between the first concrete member 10 and the second concrete member 20. As a result, a T-shaped joint space 50 is formed between the first concrete member 10, the second concrete member 20, and the third concrete member 30. In the joint space 50, the extending portion 12b of the first sheet member 12, the extending portion 22b of the second sheet member 22, and the extending portion 32b of the third sheet member 32 are respectively extended and joined to each other by welding or the like. There is. Specifically, the extended portion 12b of the first sheet member 12 and the extended portion 22b of the second sheet member 22 are joined (contacted), and the extended portion 32b of the third sheet member 32 is the first sheet member. It is joined (in contact with) the extended portion of 12 and 12b to the extended portion 22b of the second sheet member 22.

As described above, even when the joint space 50 is T-shaped, the T-shaped intersection can be formed without a gap. Therefore, it is possible to simplify the construction, shorten the construction period, improve the reliability of the waterproof function, and improve the design.

<About other application examples of joint structure>
10A and 10B are schematic explanatory views showing an example of contact with an aluminum sash. Here, a plurality of the first concrete members 10 of the third embodiment are arranged side by side as shown in FIG. 10A. Then, the aluminum sash 70 is arranged in the space formed by the plurality of first concrete members 10. The first sheet members 12 (surface layer sheet 12U, back layer sheet 12L) are welded together to form a joint up to the periphery of the aluminum sash 70.

Next, as shown in FIG. 10B, a gasket 72 is installed around the aluminum sash 70. As the gasket 72, one manufactured of EPDM, silicon, vinyl chloride resin or the like can be used. Alternatively, a sealing material may be filled instead of the gasket 72.

FIG. 11 is a schematic explanatory view showing an example in the case of contact with a vinyl chloride resin sash. In this example, a plurality of the first concrete members 10 of the third embodiment are arranged side by side as shown in FIG. 11, and the vinyl chloride resin sash 80 is arranged in the space formed by these first concrete members 10.

Then, the first sheet member 12 (here, the back layer sheet 12L) is welded to the frame of the vinyl chloride resin sash 80.

FIG. 12 is a cross-sectional view showing an example of joining (welding) the vinyl chloride resin sash 80 and the first sheet member 12. The method of joining (welding) the vinyl chloride resin sash 80 and the back layer sheet 12L may be any of those shown in FIG. Further, a method other than that shown in FIG. 12 may be used.

10 1st concrete member 12 1st sheet member 12a Embedded part 12b Extended part 12U Surface layer sheet 12L Back layer sheet 13 Vinyl chloride steel plate 14 Reinforcing bar 16 Double-sided tape 18 Release paper 20 2nd concrete member 22 2nd sheet member 22a Embedded part 22b Extension part 20 Second concrete member 22 Second sheet member 22a Embedded part 22b Extension part 22U Surface layer sheet 22L Back layer sheet 30 Third concrete member 32 Third sheet member 32a Embedded part 32b Extension part 32U Surface sheet 32L Back layer Sheet 40 4th concrete member 42 4th sheet member 42a Embedded part 42b Extension part 42U Surface layer sheet 42L Back layer sheet 50 Joint space 60 Formwork 70 Aluminum sash 72 Gasket 80 PVC resin sash

Claims (11)

The first member consolidated by the hydration reaction and
The second member consolidated by the hydration reaction and
With the third member consolidated by the hydration reaction,
With the 4th member consolidated by the hydration reaction,
The joint space between the first member, the second member, the third member, and the fourth member.
It is a joint structure equipped with
A first sheet member having a first embedded portion fixed to the first member by the hydration reaction and embedded, and a first extending portion extending from the first member to the joint space.
A second sheet member having a second embedded portion fixed to the second member by the hydration reaction and embedded, and a second extending portion extending from the second member to the joint space.
A third sheet member having a third embedded portion fixed to the third member by the hydration reaction and embedded, and a third extending portion extending from the third member to the joint space.
A fourth sheet member having a fourth embedded portion fixed to the fourth member by the hydration reaction and embedded, and a fourth extending portion extending from the fourth member to the joint space.
Equipped with
The first extending portion of the first sheet member comes into contact with the second extending portion of the second sheet member and the third extending portion of the third sheet member, and the fourth sheet member said. The fourth extension portion is in contact with the second extension portion of the second sheet member and the third extension portion of the third sheet member.
A joint structure characterized by that. The joint structure according to claim 1.
The first extension portion of the first sheet member and the fourth extension portion of the fourth sheet member are also in contact with each other.
A joint structure characterized by that. The joint structure according to claim 1 or 2.
In the joint space, there is a portion where the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion overlap.
A joint structure characterized by that. The joint structure according to claim 1 or 2.
Each seat member is
Surface sheet and
The back layer sheet provided on the back surface side of the surface layer sheet and
Have,
The corners of the back layer sheet are notched, and
The surface sheet and the back layer sheet of each extension portion are bent so that the surface layer sheets are in contact with each other.
A joint structure characterized by that. The joint structure according to claim 1 or 2.
Each seat member is
Surface sheet and
The back layer sheet provided on the back surface side of the surface layer sheet and
Have,
The positions of the surface layer sheet and the back layer sheet are misaligned.
The surface sheets of each sheet member are in contact with each other and the back layer sheets are in contact with each other.
A joint structure characterized by that. The joint structure according to claim 1 or 2.
The sheet members lined up in a predetermined direction are in contact with each other so that their extended portions are overlapped with each other.
The sheet members lined up in the direction intersecting the predetermined direction have their respective extending portions bent and in contact with each other.
A joint structure characterized by that. The joint structure according to any one of claims 1 to 6.
Each sheet member is a resin sheet,
The parts that come into contact with each other are welded by a welding agent.
A joint structure characterized by that. The first member consolidated by the hydration reaction and
The second member consolidated by the hydration reaction and
With the third member consolidated by the hydration reaction,
The joint space between the first member, the second member, and the third member,
It is a joint structure equipped with
A first sheet member having a first embedded portion fixed to the first member by the hydration reaction and embedded, and a first extending portion extending from the first member to the joint space.
A second sheet member having a second embedded portion fixed to the second member by the hydration reaction and embedded, and a second extending portion extending from the second member to the joint space.
A third sheet member having a third embedded portion fixed to the third member by the hydration reaction and embedded, and a third extending portion extending from the third member to the joint space.
Equipped with
The first extension portion of the first sheet member and the second extension portion of the second sheet member come into contact with each other, and the third extension portion of the third sheet member is the first sheet member. The first extending portion and the second extending portion of the second sheet member are in contact with each other.
A joint structure characterized by that. Cement-based composition members consolidated by hydration reaction,
A sheet member having an embedded portion fixed to and embedded in the cement-based composition member by the hydration reaction, and an extending portion extending from the cement-based composition member.
It is a manufacturing method of a joint structure member provided with
A sheet member arranging step in which one surface of the extension portion is opposed to the inner side surface of the formwork and an edge cutting material is provided on the other surface of the extension portion.
A casting step of driving the cement-based composition into the formwork while maintaining the buried portion inside the formwork.
A demolding step of demolding the mold after the cement-based composition has solidified, and a demolding step.
An extension step of removing the edge cutting material and extending the extension portion from the cement-based composition member.
A method for manufacturing a joint structure member. The method for manufacturing a joint structure member according to claim 9.
Prior to the sheet member arranging step, the reinforcing bar arranging step of arranging the reinforcing bars inside the formwork is further provided.
In the sheet member arranging step, the embedded portion of the sheet member is fixed to the reinforcing bar.
A method for manufacturing a joint structure member. The method for manufacturing a joint structure member according to claim 10.
A vinyl chloride steel plate is welded to the embedded portion of the sheet member.
The reinforcing bar and the buried portion are fixed by welding the reinforcing bar and the vinyl chloride steel plate.
A method for manufacturing a joint structure member.

Images