Horizontal slit material, slit structure, method for forming a slit structure, and method for forming a horizontal slit material

Abstract

The objective is to provide a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material that can easily form a horizontal slit in a wall adjacent to an opening where a window member is installed, accurately breaking the constraint between wall bodies or between a wall body and a floor slab. [Solution] The slit material body is installed on the bottom surface of the horizontal slit in the wall, which is a horizontal slit formed in the wall from the end face of the wall facing the notch, and the slit material embrace portion is installed on the bottom surface of the horizontal slit in the embrace portion, which is a horizontal slit formed extending from the horizontal slit in the wall toward the opening relative to the embrace portion, and is integrally formed with the slit material body.

Description

Technical Field

[0001] The present invention relates to a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material. In particular, a notch for attaching a window member formed with a partial length from one side in the thickness direction of the wall body to the periphery of an opening formed in the wall body, and the notch is formed. A horizontal slit member, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material, which are disposed in a horizontal slit formed horizontally within the height range of the opening, and a holding portion formed on the other side of the periphery of the opening to serve as a mounting base for the window member.

Background Art

[0002] Conventionally, in order to prevent a building from collapsing due to stress on a wall body being applied to a column and the column buckling, a method of forming slits along the boundary positions between the wall body and the column and between the wall body and the floor slab has been known.

[0003] FIG. 10 is an elevation view showing an example of a wall body subjected to seismic reinforcement. As shown in FIG. 10, a wall body 20 formed between two columns 10 has a horizontal slit 40 with a height of about 20 mm to 40 mm formed horizontally between the wall body 20 and the floor slab 30, so that the restraint between the wall body 20 and the floor slab 30 is interrupted. A horizontal slit material 50 having a thickness of about 20 mm to 40 mm is interposed in the horizontal slit 40 in accordance with the horizontal slit 40.

[0004] Further, the wall body 20 has vertical slits 60 with a width of about 20 mm to 40 mm formed vertically between the wall body 20 and each column 10, so that the restraint between the wall body 20 and the column 10 is interrupted. A vertical slit material 70 having a thickness of about 20 mm to 40 mm is interposed in the vertical slit 60 in accordance with the vertical slit 60.

[0005] By providing horizontal slits 40 and vertical slits 60 along the boundary between the wall 20 and the floor slab 30, and the boundary between the wall 20 and the column 10, the wall 20 and the floor slab 30, and the wall 20 and the column 10 become discontinuous structures, preventing the stress on the wall from being transmitted to the column during an earthquake. This prevents the column from buckling during an earthquake.

[0006] The procedure for forming a concrete structure begins with creating a floor slab 30. Next, horizontal slit materials 50 and vertical slit materials 70, which are to be filled into the slits, are fixed to the formwork and placed at the slit formation locations between the floor slab 30 and the wall 20, and between the wall 20 and the column 10. Then, concrete is poured into the formwork. This embeds the slit materials in the poured concrete. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2013-68009 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, when forming a window in the wall 20, it is not possible to completely sever the constraint between the wall 20 and the floor slab 30 at the mounting point of the window sash, which could lead to stress concentration at the sash mounting point during an earthquake.

[0009] Figure 11 is an elevation view showing an example of a wall structure that has been seismically reinforced and fitted with a window. As shown in Figure 11, a window member 80 consisting of a sash 81 and a window pane 82 is formed in the wall 20. Furthermore, a horizontal slit material 50 is interposed horizontally between the wall 20, which is formed on both sides via the window member 80, and the floor slab 30, thereby forming a horizontal slit 40.

[0010] Figure 12 is a cross-sectional view taken along the XX arrow in Figure 11, showing the window member installed in the opening with the window set back from the exterior wall surface. As shown in Figure 12, when the window member 80 is installed in the opening A set back from the exterior wall surface, a notch K is formed on the interior side for fitting the window member 80. The notch K is formed by cutting out approximately 40 to 50 mm from the interior wall 20 around the periphery of the opening A.

[0011] As a result, on the outdoor side of the wall body 20 at the periphery of the opening A, a hugging portion D is formed, which protrudes approximately 40 to 50 mm inward from the main wall body 20M, which is formed on the width side of the wall body beyond the notch K, to serve as a base for attaching the window member 80 in a hugging shape.

[0012] The window member 80, fitted into the notch K formed on the periphery of the opening A, is fixed to the clamping portion D. The opening A is formed by first assembling a formwork to match the uneven shape formed by the notch K and the clamping portion D, and then pouring concrete into the formwork to create a wall body 20 having the opening A with the uneven shape formed by the notch K and the clamping portion D on its periphery.

[0013] Figure 13 is a cross-sectional view taken along the YY arrow in Figure 11, showing the state in which a horizontal slit material is interposed in the wall near the opening. As shown in Figure 13(1), the horizontal slit material 50 is installed so that its longitudinal end aligns with the end face of the notch K formed on the periphery of the opening A.

[0014] Specifically, the lower wall 20 is first formed in an uneven shape consisting of notches K and embracing parts D up to the height range of the opening A formed in the wall 20, and a horizontal slit material 50 is installed on the upper surface of the lower wall 20.

[0015] At this time, the periphery of the opening A formed in the lower wall 20 is formed in an uneven shape by the notch K and the clasp D. Therefore, in order for the horizontal slit material 50 to be installed not to be exposed inward toward the opening A from the end face of the wall 20 on the opening A side, which has an uneven shape, the horizontal slit material 50 must be installed on the wall 20 side, that is, on the wall body 20M side, rather than on the end face of the notch K where the wall 20 is formed.

[0016] Subsequently, with the horizontal slit material 50 installed on the upper surface of the formed lower wall 20, a formwork is assembled above the lower wall 20 to form an upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D. Concrete is then poured into the formwork to form the upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D.

[0017] Therefore, in the bracing section D, there is no horizontal slit material 50 between the lower wall 20 and the upper wall 20. In other words, the lower wall 20 and the upper wall 20 are in a continuous state. For this reason, when an earthquake occurs, an unnecessary load may be transmitted from the wall to the bracing section D.

[0018] In order to prevent the stress applied to the wall during an earthquake from being transmitted to the embracing section D, it is conceivable to form a horizontal slit in the embracing section D as well, thereby breaking the constraint between the embracing section D in the lower wall 20 and the embracing section D in the upper wall 20.

[0019] In this case, a slit is to be formed from the outdoor side of the embracing part D that connects to the horizontal slit material 50 interposed in the wall 20. However, since the horizontal slit material 50 is embedded in the wall 20, it is extremely difficult to form a slit of about 20 to 40 mm in height that connects precisely to the horizontal slit material 50.

[0020] In addition, when forming the slit, the concrete of the wall body 20 needs to be cut. However, the holding part D for forming the slit is a part formed to protrude about 40 to 50 mm from the periphery of the opening A, which is a very fragile part. When cutting a slit about 20 to 40 mm in height in the holding part D, there is a problem that cracks will occur in the holding part D where cutting is not necessary.

[0021] Even if a slit that can be accurately combined with the horizontal slit material 50 is formed, the slit needs to be closed. Inserting a slit material of the same shape is also considered, but it is also considered that the slit material inserted later into the formed slit has poor adhesion to the slit formed in the holding part D after cutting.

[0022] As another method of releasing the restraint between the holding part D in the lower wall body 20 and the holding part D in the upper wall body 20, a method of first forming the wall body 20 with the horizontal slit material 50 interposed and forming a notch K on the peripheral surface of the opening of the wall body 20 can be considered.

[0023] As shown in FIG. 13(2), the horizontal slit material 50 is installed so that the longitudinal end is aligned with the end face of the periphery of the opening A. Specifically, first, a wall body 20 with a flat periphery of the opening A is formed up to the height range of the opening A formed in the wall body 20, and the horizontal slit material 50 is installed on the upper surface of the lower wall body 20. At this time, since the periphery of the opening A formed in the lower wall body 20 is formed flat, the horizontal slit material 50 is installed in accordance with the flat periphery of the opening A.

[0024] After that, with the horizontal slit material 50 installed on the upper surface of the formed lower wall body 20, a formwork for forming the upper wall body 20 having an opening A with a flat periphery is assembled above the lower wall body 20, and by placing concrete in the formwork, the upper wall body 20 having an opening A with a flat periphery of the opening A is formed.

[0025] After the upper wall body 20 having the opening A with a flat periphery of the opening A is formed, the notch K is formed by cutting out the indoor-side wall body 20 at the periphery of the opening A by about 40 to 50 mm. In Fig. 13(2), the portion to be cut out to form the notch K is the portion indicated by the intersecting diagonal lines.

[0026] However, forming a notch K of about 40 to 50 mm on the indoor side of the periphery of the opening A requires a lot of time and labor.

[0027] Also, a method of forming a slit in the holding portion D by fixing a joint material of the same type as the slit formed in the holding portion D in advance to the formwork and removing the joint material together with the formwork after the cast concrete has hardened is conceivable, but it is difficult to pull out the joint material embedded 40 to 50 mm inside the hardened concrete.

[0028] The present invention has been made in view of such points, and an object thereof is to provide a horizontal slit material, a slit structure, a method of forming the slit structure, and a method of forming the horizontal slit material that can easily form a horizontal slit that accurately breaks the restraint between wall bodies or between a wall body and a floor slab with respect to a wall body adjacent to an opening to which a window member is attached.

Means for Solving the Problems

[0029] In order to solve the above problem, the present invention provides a horizontal slit material to be placed in a horizontal slit, which is a slit formed horizontally within the height range of the opening, for a concrete building comprising: a notch formed on the periphery of an opening in the wall for attaching a window member, formed from one side in the thickness direction of the wall for a certain length; and a bracing portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening, and serving as a mounting base for the window member, from the wall body formed on the width direction side of the wall than the notch, and on the other side in the thickness direction of the wall at the periphery of the opening, the horizontal slit material comprising: a slit material body installed on the bottom surface of the wall body horizontal slit, which is a horizontal slit formed in the wall body; and a slit material bracing portion installed on the bottom surface of the bracing portion horizontal slit, which is a horizontal slit formed extending from the wall body horizontal slit in the direction of the opening relative to the bracing portion, and formed integrally with the slit material body, A horizontal slit material is provided, characterized by having the following features.

[0030] As a result, the slit material body is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, and the slit material embrace portion, which is formed integrally with the slit material body, is installed on the bottom surface of the horizontal slit in the embrace portion, which is a horizontal slit formed extending from the horizontal slit in the wall body in the direction of the opening relative to the embrace portion.

[0031] Furthermore, the present invention provides a slit structure for a concrete building comprising: a notch formed on the periphery of an opening formed in a wall for attaching a window member, formed from one side in the thickness direction of the wall for a certain length; and a bracing portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, formed from a wall body formed on the width direction side of the wall than the notch, on the other side in the thickness direction of the wall at the periphery of the opening, wherein a horizontal slit is formed horizontally within the height range of the opening, and the slit structure is provided comprising a horizontal slit material comprising: a slit material body installed on the bottom surface of the wall body horizontal slit, which is a horizontal slit formed in the wall body; and a slit material bracing portion installed on the bottom surface of the bracing portion horizontal slit, which is a horizontal slit formed extending from the wall body horizontal slit in the direction of the opening relative to the bracing portion, and integrally formed with the slit material body.

[0032] As a result, a horizontal slit material is installed in a concrete building, comprising a slit material body that is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, and a slit material clamp that is installed on the bottom surface of the horizontal slit in the clamping part, which is a horizontal slit that extends from the horizontal slit in the wall body toward the opening relative to the clamping part, and is integrally formed with the slit material body.

[0033] Furthermore, the present invention provides a method for forming a slit structure in a concrete building having a wall, which includes a notch formed on the periphery of an opening in the wall for attaching a window member formed from one side in the thickness direction of the wall for a certain length, and a bracing portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, from a wall body formed on the width direction side of the wall than the notch, and which serves as a mounting base for the window member, the method for forming a slit structure in which a horizontal slit is formed horizontally within the height range of the opening, is characterized by comprising the steps of: installing a slit material body on the bottom surface of a wall body horizontal slit which is a horizontal slit formed in the wall body; and installing a slit material bracing portion, which is a horizontal slit formed extending from the wall body horizontal slit in the direction of the opening relative to the bracing portion, on the bottom surface of a bracing portion horizontal slit which is a horizontal slit formed integrally with the slit material body.

[0034] As a result, the slit material body is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, and the slit material embrace portion, which is formed integrally with the slit material body, is installed on the bottom surface of the horizontal slit in the embrace portion, which is a horizontal slit formed extending from the horizontal slit in the wall body in the direction of the opening relative to the embrace portion.

[0035] Furthermore, the present invention provides a method for forming a horizontal slit material to be placed in a horizontal slit, which is a slit formed horizontally within the height range of an opening in a concrete building, the concrete building comprising: a notch formed on the periphery of an opening in the wall for attaching a window member, formed from one side in the thickness direction of the wall for a certain length on the periphery of the opening; and a bracing portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, from a wall body formed on the width direction side of the wall than the notch, the method comprising the step of integrally forming a slit material body that is installed on the bottom surface of the wall body horizontal slit, which is a horizontal slit formed on the wall body for periphery of an opening in the wall body for a window member, and a slit material bracing portion that is installed on the bottom surface of the bracing portion horizontal slit, which is a horizontal slit formed extending from the wall body horizontal slit in the direction of the opening relative to the bracing portion.

[0036] As a result, the slit material body is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, and the slit material embrace portion, which is formed integrally with the slit material body, is installed on the bottom surface of the horizontal slit in the embrace portion, which is a horizontal slit formed extending from the horizontal slit in the wall body in the direction of the opening relative to the embrace portion. [Effects of the Invention]

[0037] According to the present invention, the horizontal slit material, slit structure, method for forming the slit structure, and method for forming the horizontal slit material, the slit material body is installed on the bottom surface of the wall body horizontal slit, which is a horizontal slit formed in the wall body, and the slit material hugging portion, which is formed integrally with the slit material body, is installed on the bottom surface of the hugging portion horizontal slit, which is a horizontal slit formed extending from the wall body horizontal slit in the direction of the opening relative to the hugging portion. In the portion where the slit material body is embedded, a wall body horizontal slit is formed that breaks the constraint between the lower wall body or floor slab and the upper wall body, and in the portion where the slit material hugging portion is embedded, a hugging portion horizontal slit is formed that breaks the constraint between the lower hugging portion and the upper hugging portion. At this time, since the slit material body and the slit material hugging portion are formed integrally, both the wall body horizontal slit and the hugging portion horizontal slit become continuous horizontal slits.

[0038] Therefore, a horizontal slit can be easily formed in the wall adjacent to the opening where the window member is installed, precisely severing the constraint between the wall and the wall, or between the wall and the floor slab. [Brief explanation of the drawing]

[0039] [Figure 1] This is a perspective view showing the entire horizontal slit material according to the first embodiment. [Figure 2] These are a front view, rear view, left side view, right side view, top view, and bottom view showing the entire horizontal slit material according to the first embodiment. [Figure 3] This is a perspective view showing the process of forming a slit structure comprising a horizontal slit material according to the first embodiment. [Figure 4] This is a cross-sectional view in the wall thickness direction of the portion where the horizontal slit material is placed, showing a slit structure in which the horizontal slit material according to the first embodiment is installed. [Figure 5] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the second embodiment installed on the upper surface of the lower wall body which has a step. [Figure 6]This is a perspective view showing the entire stepped horizontal slit material according to the second embodiment. [Figure 7] These are a front view, rear view, left side view, right side view, top view, and bottom view showing the entire symmetrically formed side of the stepped horizontal slit material according to the second embodiment. [Figure 8] This is a perspective view showing the process of forming a slit structure comprising a stepped horizontal slit material according to the second embodiment. [Figure 9] This is an elevation drawing showing an example of a wall that has undergone seismic reinforcement. [Figure 10] This is an elevation drawing showing an example of a wall that has undergone seismic reinforcement. [Figure 11] This is an elevation drawing showing an example of a wall structure that has been seismically reinforced and fitted with a window. [Figure 12] This is a cross-sectional view taken along the arrow XX in Figure 11, showing the window member installed in the opening with the window set back from the exterior wall surface. [Figure 13] This is a cross-sectional view taken along the YY arrow in Figure 11, showing the state in which a horizontal slit material is interposed in the wall near the opening. [Modes for carrying out the invention]

[0040] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [First Embodiment] Figure 1 is a perspective view showing the entire horizontal slit material according to the first embodiment. The horizontal slit material of this embodiment is arranged in a horizontal slit 40 formed in a wall body 20 that is formed around an opening in which a window member is installed set back from the outer wall surface.

[0041] Specifically, in a concrete building having a notch formed on the periphery of an opening formed in the wall 20 for attaching a window member, formed from one side in the thickness direction of the wall 20 for a certain length, and a bracing portion formed on the other side of the periphery of the opening by forming the notch, which serves as a mounting base for the window member, the horizontal slit 40 is arranged in the horizontal direction within the height range of the opening.

[0042] Furthermore, the notches and clasps formed on both sides of the opening are symmetrical with respect to the opening, and the horizontal slit material of this embodiment, which is arranged around the opening, is also symmetrical with respect to the opening.

[0043] Therefore, for symmetrical components, the same reference numerals are used, and their explanations are omitted as appropriate. Similarly, for components that are substantially the same as those shown in prior art documents, the same reference numerals are used, and their explanations are omitted as appropriate.

[0044] Furthermore, if the notches and overlapping portions formed around the periphery of the opening are not symmetrical, the shape of the horizontally positioned slit material can be appropriately changed to match the shape of the notches and overlapping portions.

[0045] As shown in Figure 1, the horizontal slit material 100 is a plate-like body in which the dimension in the direction of the symmetry axis Z is equal to the thickness of the wall 20 that is formed later, and the dimension in the direction of symmetry with respect to the symmetry axis Z is the dimension from the opening A to the column 10 that is formed later.

[0046] Furthermore, as will be described later, if a joint is provided in the horizontal slit 40, the dimension in the symmetry axis Z direction of the horizontal slit material 100 can be made shorter than the thickness of the wall 20, and the dimension in the symmetry direction can be made shorter than the dimension from the opening A to the column 10 that is formed later.

[0047] Furthermore, when arranging multiple divided horizontal slit members to cover the distance from the opening A to the column 10 that is formed afterward, the horizontal slit member 100 of this embodiment can be placed at the end of the wall 20 on the wall 20 side, and the conventional horizontal slit member 50 can be continuously placed on the side of the horizontal slit member 100 facing the opening A. Accordingly, the symmetrical dimensions of the horizontal slit member 100 of this embodiment can be formed to any appropriate dimensions.

[0048] The horizontal slit material 100 comprises a slit material body portion 110 and a slit material holding portion 120. The horizontal slit material 100 is installed in the lower wall 20 or the upper surface of the floor slab 30, facing the notch portion K, to the bottom surface of the horizontal slit in the wall 20, which is the horizontal slit 40 formed in the wall 20, with an uneven shape consisting of a notch portion K and a holding portion D, up to the height range of the opening A that is formed in the wall 20 in advance.

[0049] The slit material body portion 110 is formed at the same height (approximately 25 mm to 35 mm) as the horizontal slits that are formed later, and is formed as a rectangular plate-like body in which the dimension in the symmetry axis Z direction is equal to the thickness of the wall 20 and the dimension in the symmetry direction is equal to the dimension from the opening A to the column 10 that is formed later.

[0050] The material constituting the slit material body 110 consists of a foam that possesses elasticity and fire resistance properties that can follow the load during concrete placement and deformation during drying shrinkage. Examples of materials for the foam constituting the slit material body 110 include calcium carbonate foam, rock wool, ceramic fiber, and calcium silicate.

[0051] Furthermore, in order to absorb unevenness on the surface of the lower wall 20 or floor slab 30, an unevenness absorbing section made of a synthetic resin material such as polyethylene or polypropylene, which has higher elasticity than the slit material main body 110 or the slit material holding portion 120, can be interposed between the slit material main body 110 and the lower wall 20 or floor slab 30.

[0052] Furthermore, by constructing the slit material body 110 from a non-water-absorbing or low-water-absorbing phenolic foam, it can follow the load during concrete placement and deformation during drying shrinkage, and possess elasticity and fire resistance that can absorb unevenness on the surface of the lower wall 20 or floor slab 30 (hereinafter referred to as the side wall 20, but also including the floor slab 30).

[0053] Furthermore, if elasticity and fire resistance are required to adequately follow the load during concrete placement and deformation during drying shrinkage, and to adequately absorb unevenness on the surface of the lower wall 20, the density of the slit material body 110 is preferably 20 kg / m³ to 50 kg / m³, and even better, the density of the slit material body 110 is 29 kg / m³.

[0054] To give a more specific example of materials, the slit material body 110 should be made of phenolic foam insulation material type 1, no. 2 CII as specified by JIS (Japanese Industrial Standards).

[0055] The slit material body 110 is formed from phenol foam insulation with a density of 29 kg / m3, which allows it to adequately follow the load during concrete placement and deformation during drying shrinkage, and also to adequately absorb unevenness on the surface of the lower wall 20.

[0056] The slit material holding portion 120 is made of the same material as the slit material main body portion 110 and is formed integrally with the slit material main body portion 110. Furthermore, the slit material holding portion 120 is installed on the bottom surface of the horizontal slit of the holding portion, which is a horizontal slit formed by extending from the horizontal slit of the wall body in the direction of the opening A relative to the holding portion D. The horizontal slit material 100 consists of a slit material body portion 110 and a slit material holding portion 120, and is formed as a continuous plate-like body with the same height as the horizontal slits that are formed.

[0057] When installing the horizontal slit material 100, the lower wall 20 is first formed so that the periphery of the opening is uneven, consisting of a notched portion K and a hugging portion D, up to the height range of the opening A formed in the wall 20.

[0058] Next, the horizontal slit material 100 is positioned such that the end face of the lower wall 20 facing the notch K is flush with the end face of the slit material body 110 on the symmetry axis Z side, and the end face of the holding portion D of the lower wall 20 on the symmetry axis Z side is flush with the end face of the slit material holding portion 120 on the symmetry axis Z side.

[0059] As a result, the slit material body portion 110 is installed from the end face of the wall body 20 facing the opening side of the notch portion K, aligned with the upper surface of the wall body portion 20M of the lower wall body 20, and the slit material holding portion 120, which is formed integrally with the slit material body portion 110, is installed aligned with the upper surface of the holding portion D of the lower wall body 20.

[0060] To fix the horizontal slit material 100 to the upper surface of the lower wall 20, the upper surface of the lower wall 20 and the horizontal slit material 100 may be bonded together with an adhesive, or the horizontal slit material 100 may be fixed by passing through the through-holes formed in the plane of the horizontal slit material 100 through the vertical reinforcement bars arranged inside the wall 20.

[0061] Next, with the horizontal slit material 100 installed on the upper surface of the formed lower wall 20, a formwork is assembled above the lower wall 20 to form an upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D, and concrete is poured into the formwork. This forms an upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D.

[0062] After the poured concrete has hardened, the formwork is removed, completing the wall 20 with the horizontal slit material 100 embedded between the lower wall 20 and the upper wall 20. At this time, the slit material main body portion 110 is embedded in the wall 20 from the end face facing the notch portion K, and the slit material holding portion 120 is embedded from the end face on the axis of symmetry Z side of the holding portion D so as to be continuous with the slit material main body portion 110 embedded in the wall 20.

[0063] Therefore, in the portion where the slit material body portion 110 is embedded, a horizontal wall slit is formed that breaks the constraint between the lower wall 20 and the upper wall 20, and in the portion where the slit material holding portion 120 is embedded, a horizontal holding portion slit is formed that breaks the constraint between the lower holding portion D and the upper holding portion D. Since the slit material body portion 110 and the slit material holding portion 120 are formed integrally, both the horizontal wall slit and the horizontal holding portion slit become continuous horizontal slits.

[0064] As described above, by arranging the horizontal slit material 100 of this embodiment on the wall body 20 at the periphery of the opening, a horizontal slit continuous with the wall body's horizontal slit can be formed in the embracing portion D.

[0065] This eliminates the need to cut and form horizontal slits after the wall 20 has been formed. Therefore, no load is placed on the clamping portion D during cutting, and gaps that may occur when inserting slit material into poorly adhering slits formed by cutting are avoided, thus improving waterproofing.

[0066] Furthermore, by interposing a conventional horizontal slit material 50 between the lower wall 20, which has a flat periphery opening, and the upper wall 20, the effort of forming a notch K after the concrete has hardened is eliminated.

[0067] Therefore, by placing the horizontal slit material 100 of this embodiment on the wall 20 at the periphery of the opening, a horizontal slit can be easily formed in the wall 20 adjacent to the opening A to which the window member 80 is attached, which accurately breaks the constraint between the wall 20 and the wall 20, or between the wall 20 and the floor slab 30.

[0068] Figure 2 shows the overall front view, rear view, left side view, right side view, top view, and bottom view of the horizontal slit material according to the first embodiment. As shown in Figure 2, the horizontal slit material 100 consists of a slit material body portion 110 and a slit material holding portion 120, and is a continuous plate-like body in which the slit material body portion 110 and the slit material holding portion 120 are integrally formed. Note that the term "integrally formed continuous plate-like body" here also includes cases where the slit material body portion 110 and the slit material holding portion 120 are formed separately and then bonded together to form a single unit.

[0069] Figure 3 is a perspective view showing the process of forming a slit structure equipped with a horizontal slit material according to the first embodiment. Since the notches K and the embracing portions D formed on both sides with respect to the opening A are symmetrical with respect to the opening A, the process of forming a slit structure equipped with a horizontal slit material in one side of the wall 20 will be explained here as an example.

[0070] Figure 3(A) is a perspective view showing the lower part of a wall 20 having an opening to which a window member is attached. As shown in Figure 3(A), the lower part of the wall 20 having an opening A to which the window member 80 is attached is formed in an uneven shape consisting of a notch K and a hugging portion D.

[0071] Figure 3(B) is a perspective view showing the state in which the horizontal slit material 100 is installed on the upper surface of the pre-formed lower wall 20. The horizontal slit material 100 is positioned such that the end face of the lower wall 20 facing the notch K is flush with the end face of the slit material body 110 on the symmetry axis Z side, and the end face of the holding portion D of the lower wall 20 on the symmetry axis Z side is flush with the end face of the slit material holding portion 120 on the symmetry axis Z side.

[0072] As a result, the slit material body portion 110 is installed from the end face of the wall body 20 facing the notch portion K, aligned with the upper surface of the wall body portion 20M of the lower wall body 20, and the slit material holding portion 120, which is integrally formed with the slit material body portion 110, is installed aligned with the upper surface of the holding portion D of the lower wall body 20.

[0073] Furthermore, waterproof tape such as butyl tape can be applied to the upper and lower surfaces of the horizontal slit material 100 and horizontal slit material 50 along the longitudinal direction of the wall 20, as needed. This improves the waterproofing effect in the formed slit portions.

[0074] Figure 3(C) is a perspective view showing the state in which the upper wall 20 is formed above the horizontal slit material 100 installed on the upper surface of the lower wall 20. With the horizontal slit material 100 installed on the upper surface of the formed lower wall 20, formwork is assembled above the lower wall 20 to form an upper wall 20 having an opening A with an uneven shape consisting of a notch K and a hugging portion D around its periphery, and concrete is poured into the formwork. This forms an upper wall 20 having an opening A with an uneven shape consisting of a notch K and a hugging portion D around its periphery. After the poured concrete hardens, the formwork is removed to complete the wall 20 with the horizontal slit material 100 embedded between the lower wall 20 and the upper wall 20.

[0075] The slit material main body portion 110 is embedded in the wall 20 from the end face facing the notch portion K, and the slit material holding portion 120 is embedded in the wall 20 in a continuous manner from the end face of the holding portion D on the symmetry axis Z side.

[0076] Therefore, in the portion where the slit material body portion 110 is embedded, a horizontal wall slit is formed that breaks the constraint between the lower wall 20 and the upper wall 20, and in the portion where the slit material holding portion 120 is embedded, a horizontal holding portion slit is formed that breaks the constraint between the lower holding portion D and the upper holding portion D. Since the slit material body portion 110 and the slit material holding portion 120 are formed integrally, both the horizontal wall slit and the horizontal holding portion slit become continuous horizontal slits.

[0077] Figure 3(D) is a perspective view showing the window member 80 attached to the notch K formed on the periphery of the opening A. As shown in Figure 3(D), the window member 80 is attached to the notch K formed on the periphery of the opening A.

[0078] At this time, the wall 20 around the opening is formed by embedding a horizontal slit material 100 between the lower wall 20 and the upper wall 20, thereby releasing the constraint between the lower wall 20 and the upper wall 20.

[0079] Figure 4 is a cross-sectional view in the wall thickness direction of the portion where the horizontal slit material is placed, showing a slit structure in which the horizontal slit material according to the first embodiment is installed. As shown in Figure 4(A), the slit material main body portion 110 is embedded in the wall 20 from the end face facing the notch portion K, and the slit material holding portion 120 is embedded from the end face on the symmetry axis Z side of the holding portion D so as to be continuous with the slit material main body portion 110 embedded in the wall 20.

[0080] Next, as shown in Figure 4(B), the slit material body portion 110 and the slit material holding portion 120 can be fitted with joint members M as needed. The joint member M is, for example, a rod about 20 mm to 35 mm in diameter, and is fixed to the formwork in advance in accordance with the position where the horizontal slit material will be installed. Specifically, after the slit material body 110 is installed in accordance with the upper surface of the wall body 20M of the lower wall 20, the joint member M is fixed to the formwork for forming the upper wall 20 in accordance with the outdoor side surface of the horizontal slit material 100 to be installed.

[0081] Concrete is poured into the formwork to which the joint member M is attached, and the upper wall 20 is formed as the concrete hardens. After the formwork is removed, the joint member M is removed, and the formed joint is filled with sealant to prevent water leakage. The joint member can also be formed on the indoor side if necessary.

[0082] Furthermore, the joint member M can be fixed not only to the formwork for forming the upper wall 20, but also to the outdoor side of the horizontal slit material 100 in advance.

[0083] A horizontal slit material 100, to which a joint member M is fixed in line with the outdoor side surface, may be positioned to align with the upper surface of the lower wall 20, formwork for forming the upper wall 20 may be assembled, and concrete may be poured into the formwork.

[0084] [Second Embodiment] Next, a second embodiment of the present invention will be described. The horizontal slit material of this embodiment is substantially the same as that shown in the first embodiment, except that the horizontal slit material is equipped with a stepped member. For this reason, the same reference numerals are used for components that are substantially the same as those in the first embodiment, and their descriptions will be omitted as appropriate.

[0085] Figure 5 is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the second embodiment installed on the upper surface of the lower wall body which has a step. The stepped horizontal slit material 200 of this embodiment is placed in a stepped horizontal slit which has a step formed in the wall body 20 that is formed around an opening in which a window member is installed set back from the outer wall surface.

[0086] Specifically, in a concrete building having a notch K formed on the periphery of an opening A formed in the wall 20 for attaching a window member 80 formed from one side in the thickness direction of the wall 20 for a certain length, and a clamping portion D formed on the other side of the periphery of the opening A by forming the notch K, which serves as a mounting base for the window member 80, the device is placed in a stepped horizontal slit Y, which is a slit with a step formed horizontally within the height range of the opening A.

[0087] Furthermore, the notches K and the clasping portion D formed on both sides of the opening A are symmetrical with respect to the opening A, and the stepped horizontal slit material 200 of this embodiment, which is arranged around the opening A, is also symmetrical with respect to the opening A.

[0088] Therefore, for symmetrical components, the same reference numerals are used, and their explanations are omitted as appropriate. Similarly, for components that are substantially the same as those shown in prior art documents, the same reference numerals are used, and their explanations are omitted as appropriate.

[0089] Furthermore, if the notches K and the clamping portions D formed around the periphery of the opening are not symmetrical, the shape of the stepped horizontal slit material 200 can be appropriately changed to match the shape of the notches K and the clamping portions D.

[0090] As shown in Figure 5, the stepped horizontal slit Y on which the stepped horizontal slit material 200 is arranged is the bottom surface of the horizontal slit 40 in the first embodiment, and a step is provided on the upper surface of the lower wall 20.

[0091] Specifically, the stepped horizontal slit Y is formed in the lower wall 20 as a stepped section S consisting of two surfaces: an upper surface 21, which is higher on the indoor side than the outdoor side to prevent water intrusion when the water level rises, and a lower surface 22, which is lower on the outdoor side than the upper surface 21. For convenience, the vertical surface at the boundary between the upper surface 21 and the lower surface 22 will be referred to as the boundary surface 23 in the following explanation.

[0092] The stepped horizontal slit material 200 is installed to fill the gap in the stepped horizontal slit Y, which is a horizontally arranged gap between the lower wall 20 and the upper wall 20 and has a stepped portion S to prevent water from entering from the outside.

[0093] Furthermore, as will be described later, if a joint is provided in the stepped horizontal slit Y, the dimension in the direction of the axis of symmetry Z of the stepped horizontal slit material 200 can be made shorter than the thickness of the wall 20, and the dimension in the direction of symmetry can be made shorter than the dimension from the opening A to the column 10 that is formed later.

[0094] Furthermore, when arranging multiple divided horizontal slit members to cover the distance from the opening A to the column 10 that is formed afterward, the stepped horizontal slit member 200 of this embodiment can be placed at the wall body 20 side end of the wall body 20, and a conventional stepped horizontal slit member 90 (not shown here) can be continuously placed on the side of the stepped horizontal slit member 200 facing the opening A. In response to this, the symmetrical dimensions of the stepped horizontal slit member 200 of this embodiment can be formed to any appropriate dimension.

[0095] The stepped horizontal slit material 200 comprises a stepped slit material main body portion 210, a portion of which is installed on at least the upper surface 21; an L-shaped stepped fitting portion 220, which is installed to fit into the stepped portion S; and a stepped slit material holding portion 230.

[0096] Specifically, the stepped fitting portion 220 is formed such that its bottom surface contacts the lower surface 22, and its back surface, which is on the indoor side, contacts the boundary surface 23. The stepped slit material main body 210 and the stepped fitting portion 220 are formed as a continuous, integrated unit, with the main body 210 positioned on the upper surface 21.

[0097] The stepped slit material holding portion 230 is made of the same material as the stepped slit material main body portion 210 and the stepped fitting portion 220, and is formed integrally with the stepped slit material main body portion 210 and the stepped fitting portion 220.

[0098] Furthermore, the stepped slit material holding portion 230 is installed on the bottom surface of the horizontal slit of the holding portion, which is a horizontal slit formed by extending in the direction of the opening A from the horizontal lower slit of the wall body 20, which is a slit within the wall body 20 including the lower surface 22 of the stepped portion S, relative to the holding portion D. The height of the stepped slit material holding portion 230 can be any height as long as it is within the range of the height of the stepped horizontal slit Y to be formed.

[0099] The stepped horizontal slit material 200 is formed as a continuous plate-like body of the same height as the horizontal slits it forms, consisting of a stepped slit material main body portion 210, a stepped fitting portion 220, and a stepped slit material holding portion 230.

[0100] In this embodiment, the interface 23 is depicted as vertical, but it may also be a slope. As long as the bottom surface of the stepped fitting portion 220 contacts the lower step surface 22 and the back surface of the stepped fitting portion 220 contacts the interface 23, the shape of the stepped horizontal slit material 200 can be formed arbitrarily. The material of the stepped horizontal slit material 200 is the same as that of the horizontal slit material 100 according to the first embodiment.

[0101] Furthermore, in this embodiment, the uppermost surface of the stepped fitting portion 220 is formed at the same height as the upper surface of the stepped slit material main body portion 210, but a difference in height may be provided between the uppermost surface of the stepped fitting portion 220 and the upper surface of the stepped slit material main body portion 210.

[0102] At this time, the uppermost surface of the stepped fitting portion 220 is formed at a higher position than the upper step surface 21, Even if the water level rises above the upper surface 21, the stepped fitting portion 220 can act as a breakwater because its uppermost surface is higher than the upper surface 21. This prevents water from entering the interior of the building.

[0103] When installing the stepped horizontal slit material 200, the lower wall 20 is first formed so that the periphery of the opening A, which is formed in the wall 20, has an uneven shape consisting of a notch K and a hugging portion D, up to the height range of the opening A formed in the wall 20. The upper surface of this lower wall 20 is provided with a stepped portion S to prevent water from entering from the outside.

[0104] Next, the stepped horizontal slit material 200 is positioned such that the stepped fitting portion 220 fits into the stepped portion S, and the stepped fitting portion 230 fits into the stepped fitting portion 230, and the stepped fitting portion 230 fits into the stepped fitting portion 230, and the stepped fitting portion 200 fits into the stepped fitting portion 230, such that the stepped fitting portion 230 fits into the stepped fitting portion 220, and the stepped fitting portion 230 fits into the stepped fitting portion 220, so that the stepped fitting portion 230 fits into the stepped fitting portion 220, and the stepped fitting portion 230 is flush with the stepped fitting portion 220, so that the stepped fitting portion 230 is flush with the stepped fitting portion 230, so that the stepped fitting portion 230 is flush with the stepped fitting portion 230, such that the stepped fitting portion 230 is flush with fits into the stepped fitting portion 220, so that the stepped fitting portion 220 fits into the stepped fitting portion 210, so that the stepped fitting portion 220 fits into the stepped fitting portion S, and the stepped fitting portion 230 fits into the stepped fitting portion 230, such that the stepped fitting portion 230 fits into the stepped fitting portion 230, so that the stepped fitting portion 230 fits into the stepped fitting portion 230, so that the stepped fitting portion 230 fits into the stepped fitting portion S, and the stepped fitting portion 230 fits into the stepped fitting portion S, so that the stepped fitting portion 230 fits into the stepped fitting portion S, and the stepped fitting portion 230 fits into the stepped fitting portion S, and

[0105] As a result, the stepped slit material body portion 210 is installed from the end face of the wall body 20 facing the notch portion K, aligned with the upper surface of the wall body portion of the lower wall body 20, the stepped fitting portion 220 is installed aligned with the stepped fitting portion 220 of the lower wall body 20, and the stepped slit material holding portion 230, which is integrally formed with the stepped slit material body portion 210 and the stepped fitting portion 220, is installed aligned with the upper surface of the holding portion D of the lower wall body 20.

[0106] To fix the stepped horizontal slit material 200 to the upper surface of the lower wall 20, the upper surface of the lower wall 20 and the stepped horizontal slit material 200 may be bonded together with an adhesive, or the stepped horizontal slit material 200 may be fixed by passing through the through-holes formed in the plane of the stepped horizontal slit material 200 through the vertical reinforcement bars arranged inside the wall 20.

[0107] Next, with the stepped horizontal slit material 200 installed on the upper surface of the formed lower wall 20, a formwork is assembled above the lower wall 20 to form an upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D, and concrete is poured into the formwork. This forms an upper wall 20 having an opening A with an uneven shape on its periphery consisting of a notch K and a hugging portion D.

[0108] After the poured concrete has hardened, the formwork is removed, completing the wall 20 with a stepped horizontal slit material 200 embedded between the lower wall 20 and the upper wall 20. At this time, the stepped slit material main body 210 and the stepped fitting portion 220 are embedded in the wall 20 from the end face facing the notch K, and the stepped slit material holding portion 230 is embedded from the end face on the symmetry axis Z side of the holding portion D so as to be continuous with the stepped slit material main body 210 and the stepped fitting portion 220 embedded in the wall 20.

[0109] Therefore, in the portion where the stepped slit material main body 210 and the stepped fitting portion 220 are embedded, a stepped wall horizontal slit is formed that breaks the constraint between the lower wall 20 and the upper wall 20, and in the portion where the stepped slit material holding portion 230 is embedded, a holding portion horizontal slit is formed that breaks the constraint between the lower holding portion D and the upper holding portion D. Since the stepped slit material main body 210 and the stepped fitting portion 220 and the stepped slit material holding portion 230 are formed integrally, both the wall horizontal slit and the holding portion horizontal slit become continuous horizontal slits.

[0110] As described above, by arranging the stepped horizontal slit material 200 of this embodiment on the wall body 20 at the periphery of the opening, it is possible to form a horizontal slit that is continuous with the wall body horizontal slit in the embracing portion D, which could not be freed from the constraints imposed by the conventional stepped horizontal slit material 90.

[0111] Figure 6 is a perspective view showing the entire stepped horizontal slit material according to the second embodiment. As shown in Figure 6, the stepped horizontal slit material 200 is a plate-like body with a step formed in the direction of symmetry axis Z, where the dimension in the direction of symmetry axis Z is equal to the thickness of the wall body 20 that is formed later, and the dimension in the direction of symmetry with respect to the axis of symmetry Z is the dimension from the opening A to the column 10 that is formed later. It comprises a stepped slit material main body portion 210, a stepped fitting portion 220, and a stepped slit material holding portion 230.

[0112] Figure 7 shows a front view, rear view, left side view, right side view, top view, and bottom view of one side of a stepped horizontal slit material according to the second embodiment, which is symmetrically formed. As shown in Figure 7, the stepped horizontal slit material 200 consists of a stepped slit material main body 210, a stepped fitting part 220, and a stepped slit material holding part 230, and the stepped horizontal slit material 200 is a continuous stepped plate-like body in which the stepped slit material main body 210, the stepped fitting part 220, and the stepped slit material holding part 230 are integrally formed.

[0113] Furthermore, the term "integrally formed continuous stepped plate-like body" as used herein includes a product in which the stepped slit material body portion 210, the stepped fitting portion 220, and the stepped slit material holding portion 230 are formed separately, and then the stepped slit material body portion 210, the stepped fitting portion 220, and the stepped slit material holding portion 230 are bonded together to form a single unit.

[0114] Figure 8 is a perspective view showing the formation process of a slit structure comprising a stepped horizontal slit material according to the second embodiment. Since the notches K and the embracing portions D formed on both sides with respect to the opening A are symmetrical with respect to the opening A, the formation process of a slit structure comprising a stepped horizontal slit material 200 in one side of the wall 20 will be explained here as an example.

[0115] Figure 8(A) is a perspective view showing the lower part of a wall 20 having an opening to which a window member is attached. As shown in Figure 8(A), the lower side of the wall 20 having an opening A to which the window member 80 is attached is formed into an uneven shape consisting of a notch K and a hugging portion D.

[0116] Figure 8(B) is a perspective view showing the state in which the stepped horizontal slit material 200 is installed on the upper surface of the pre-formed lower wall 20. The stepped horizontal slit material 200 is positioned such that the stepped fitting portion 220 fits into the stepped portion S, and the stepped fitting portion 220 fits into the stepped portion S, such that the stepped fitting portion 220 fits into the stepped fitting portion 230, such that the stepped fitting portion 230 fits into the stepped fitting portion 230, such that the stepped fitting portion 230 fits into the stepped fitting portion 220, such that the stepped fitting portion 230 fits into the stepped fitting portion 220 fits into the stepped fitting portion 210, such that S.

[0117] As a result, the stepped slit material body portion 210 is installed from the end face of the wall body 20 facing the notch portion K, aligned with the upper surface of the wall body portion of the lower wall body 20, the stepped fitting portion 220 is installed aligned with the stepped fitting portion 220 of the lower wall body 20, and the stepped slit material holding portion 230, which is integrally formed with the stepped slit material body portion 210 and the stepped fitting portion 220, is installed aligned with the upper surface of the holding portion D of the lower wall body 20.

[0118] Furthermore, waterproof tape such as butyl tape can be applied to the upper and lower surfaces of the stepped horizontal slit material 200 or the conventional stepped horizontal slit material 90 along the longitudinal direction of the wall 20, as needed. This improves the waterproofing effect in the formed slit portions.

[0119] Figure 8(C) is a perspective view showing the state in which the upper wall 20 is formed above the stepped horizontal slit material 200 installed on the upper surface of the lower wall 20. With the stepped horizontal slit material 200 installed on the upper surface of the formed lower wall 20, a formwork is assembled above the lower wall 20 to form an upper wall 20 having an opening A with an uneven shape consisting of a notch K and a hugging portion D around its periphery, and concrete is poured into the formwork.

[0120] This creates an upper wall 20 having an opening A with an uneven shape on its periphery, consisting of a notched portion K and a cradling portion D. After the poured concrete hardens, the formwork is removed to complete a wall 20 with a stepped horizontal slit material 200 embedded between the lower wall 20 and the upper wall 20.

[0121] The stepped slit material main body 210 and the stepped fitting portion 220 are embedded in the wall 20 from the end face facing the notch K, and the stepped slit material holding portion 230 is embedded from the end face on the symmetry axis Z side of the holding portion D so as to be continuous with the stepped slit material main body 210 and the stepped fitting portion 220 embedded in the wall 20.

[0122] Therefore, in the portion where the stepped slit material main body 210 and the stepped fitting portion 220 are embedded, a stepped wall horizontal slit is formed that breaks the constraint between the lower wall 20 and the upper wall 20, and in the portion where the stepped slit material holding portion 230 is embedded, a holding portion horizontal slit is formed that breaks the constraint between the lower holding portion D and the upper holding portion D. Since the stepped slit material main body 210 and the stepped fitting portion 220 and the stepped slit material holding portion 230 are formed integrally, both the wall horizontal slit and the holding portion horizontal slit become continuous horizontal slits.

[0123] Figure 8(D) is a perspective view showing the window member 80 attached to the notch K formed on the periphery of the opening A. As shown in Figure 8(D), the window member 80 is attached to the notch K formed on the periphery of the opening A.

[0124] At this time, the wall 20 around the opening is formed by embedding a stepped horizontal slit material 200 between the lower wall 20 and the upper wall 20, thereby creating a stepped horizontal slit Y that breaks the constraint between the lower wall 20 and the upper wall 20.

[0125] Figure 9 is a cross-sectional view in the wall thickness direction of the portion where the stepped horizontal slit material is installed, showing a slit structure in which the stepped horizontal slit material according to the second embodiment is installed. As shown in Figure 9(A), the stepped slit material main body 210 and the stepped fitting portion 220 are embedded in the wall 20 from the end face facing the notch K, and the stepped slit material holding portion 230 is embedded from the end face on the symmetry axis Z side of the holding portion D so as to be continuous with the slit material main body 110 embedded in the wall 20.

[0126] Next, as shown in Figure 4(B), the stepped fitting portion 220 and the stepped slit material holding portion 230 can be fitted with a joint member M as needed. The joint member M is, for example, a rod about 20 mm to 35 mm in diameter, and is fixed to the formwork in advance to match the position where the stepped horizontal slit material 200 will be installed. Specifically, after the stepped horizontal slit material 200 is installed in line with the upper surface of the lower wall 20, the joint member M is fixed to the formwork for forming the upper wall 20, in line with the outdoor side of the stepped horizontal slit material 200 that will be installed.

[0127] Concrete is poured into the formwork to which the joint member M is attached, and the upper wall 20 is formed as the concrete hardens. After the formwork is removed, the joint member M is removed, and the formed joint is filled with sealant to prevent water leakage. The joint member can also be formed on the indoor side if necessary.

[0128] Furthermore, the joint member M can be fixed not only to the formwork for forming the upper wall 20, but also to the outdoor side of the horizontal slit material 100 in advance.

[0129] A stepped horizontal slit material 200 with joint members M fixed to the outdoor side surface may be positioned to match the upper surface of the lower wall 20, formwork for forming the upper wall 20 may be assembled, and concrete may be poured into the formwork. [Explanation of symbols]

[0130] 100 Horizontal Slit Material 110 Slit material main body 120 Slit material holding section

Claims

1. In a concrete building comprising: a notch formed on the periphery of an opening in the wall for attaching a window member formed from one side in the thickness direction of the wall for a certain length; and a support portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, from the wall body formed on the width direction side of the wall beyond the notch, on the other side in the thickness direction of the wall at the periphery of the opening, a horizontal slit material is arranged in a horizontal slit which is a slit formed horizontally within the height range of the opening, The slit material body is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, A slit material clamping portion is installed on the bottom surface of the horizontal slit of the clamping portion, which is a horizontal slit formed extending inward from the horizontal slit of the wall body to the opening relative to the clamping portion, and is formed integrally with the slit material body portion. A horizontal slit material characterized by having the following features.

2. An elastic layer having higher elasticity than the slit material body portion or the slit material embrace portion is provided on at least one side of the bottom surface of the horizontal slit of the wall body portion or the bottom surface of the horizontal slit of the embrace portion. The horizontal slit material according to claim 1, characterized by comprising the above.

3. The aforementioned horizontal slit is A stepped portion is provided on one side in the thickness direction of the wall body at the bottom surface of the horizontal slit of the wall body, forming a stepped bottom surface which is lower than the other side. Stepped fitting portion installed by fitting into the stepped portion, The horizontal slit material according to claim 1, characterized by comprising the above.

4. The horizontal slit has a stepped bottom horizontal slit that extends inward from the stepped bottom surface to the opening, The aforementioned slit material holding portion is It is installed on the bottom surface of the stepped horizontal slit and is formed integrally with the stepped fitting portion. A horizontal slit material according to claim 3, characterized by the above.

5. In a concrete building comprising: a notch formed on the periphery of an opening in the wall for attaching a window member formed from one side in the thickness direction of the wall for a certain length; and a support portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, from the wall body formed on the width direction side of the wall relative to the notch, on the other side in the thickness direction of the wall at the periphery of the opening, a slit structure in which a horizontal slit is formed horizontally within the height range of the opening, A horizontal slit material comprising: a slit material body portion installed on the bottom surface of the horizontal slit of the wall body, which is a horizontal slit formed in the wall body portion; and a slit material holding portion installed on the bottom surface of the horizontal slit of the holding portion, which is a horizontal slit formed extending inward from the horizontal slit of the wall body to the opening relative to the holding portion, and formed integrally with the slit material body portion. A slit structure characterized by having the following features.

6. A method for forming a slit structure in a concrete building having a notch formed on the periphery of an opening in the wall for attaching a window member, formed for a certain length from one side in the thickness direction of the wall, and a support portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, wherein a horizontal slit is formed horizontally within the height range of the opening, The process involves installing the slit material body on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body, A step in which a slit material clamping portion is installed on the bottom surface of the horizontal slit of the clamping portion, which is a horizontal slit formed in the direction inward from the horizontal slit of the wall body to the opening, with respect to the clamping portion, A method for forming a slit structure, characterized by comprising the following features.

7. A method for forming a horizontal slit material to be placed in a horizontal slit, which is a slit formed horizontally within the height range of the opening, in a concrete building having a notch formed on the periphery of an opening in the wall for attaching a window member formed from one side in the thickness direction of the wall for a certain length, and a clamping portion formed on the other side in the thickness direction of the wall at the periphery of the opening so as to protrude inward into the opening and serve as a mounting base for the window member, in a concrete building having a horizontal slit formed horizontally within the height range of the opening, A step of integrally forming a slit material body portion which is installed on the bottom surface of the horizontal slit in the wall body, which is a horizontal slit formed in the wall body portion, and a slit material holding portion which is installed on the bottom surface of the horizontal slit in the holding portion, which is a horizontal slit formed extending inward from the horizontal slit in the wall body to the opening relative to the holding portion, A method for forming a horizontal slit material, characterized by comprising the following features.

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