Joint structure

Abstract

To provide a joint structure capable of securing waterproofness, even a relative displacement occurs between building components.SOLUTION: A joint structure comprises a first building component 11, a second building component 12, and a plate jointing the first building component 11 and the second building component 12. The plate has a fixing face 13a1 fixed to the second building component 12. Fixing strength between the fixing face 13a1 of the plate and the second building component 12 is larger than the fixing strength between the fixing face 13a1 of the plate and the first building component 11 at a position opposite thereto. The plate is fixed to the first building component 11 at a position different from the position opposite to the fixing face 13a1.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a joining structure. 【Background Art】 【0002】 Conventionally, in order to ensure waterproofness between building members, for example, between an outer wall and a window frame, a technique of providing a joint filler between building members is known as described in Non-Patent Document 1. 【Prior Art Documents】 【Non-Patent Documents】 【0003】 【Non-Patent Document 1】 Toho Leo Co., Ltd., "Eco Therm Exterior Insulation Catalog / Finished Integrated Exterior Insulation System for Wooden Buildings_Catalog View", [online], [searched on September 17, 2021], Internet <https: / / www.catalabo.org / iportal / cv.do?c=31157330000&pg=1&v=CATALABO&d=link> 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 Here, in the technique described in Non-Patent Document 1, when relative displacement occurs between building members due to an earthquake, strong wind, etc., there is a risk that the joint filler peels off from the building members and the waterproofness is impaired. 【0005】 Therefore, an object of the present invention is to provide a joining structure that can ensure waterproofness even when relative displacement occurs between building members. 【Means for Solving the Problems】 【0006】 The joining structure according to the first aspect of the present invention is (1) The joining structure comprises a first building member, a second building member, and a plate material for joining the first building member and the second building member, wherein the plate material has a fixing surface that is fixed to the second building member, the fixing strength between the fixing surface of the plate material and the second building member is greater than the fixing strength between the plate material and the first building member at a position opposite to the fixing surface, and the plate material is fixed to the first building member at a position different from the position opposite to the fixing surface. 【0007】 One embodiment of the present invention is a joining structure, (2) The first building member is a joint structure as described in (1) above, which is not fixed to the plate material at a position opposite to the fixed surface. 【0008】 One embodiment of the present invention is a joining structure, (3) The aforementioned plate material is a joint structure described in (1) or (2) above, which deforms in the out-of-plane direction. 【0009】 One embodiment of the present invention is a joining structure, (4) The aforementioned plate material is a joint structure according to any one of (1) to (3) above, which covers the end of the first building member. 【0010】 One embodiment of the present invention is a joining structure, (5) The first building component is a joint structure according to any one of (1) to (4) above, including an insulating material. [Effects of the Invention] 【0011】 According to the present invention, it is possible to provide a joint structure that can ensure waterproofing even when relative displacement occurs between building components. [Brief explanation of the drawing] 【0012】 [Figure 1] This is a horizontal cross-sectional view of a joint structure as a first embodiment of the present invention. [Figure 2] This figure shows the behavior of the joint structure shown in Figure 1 when displacement occurs in the direction that separates the first and second building members. [Figure 3] This is a horizontal cross-sectional view of a joint structure as a second embodiment of the present invention. [Figure 4] This is a horizontal cross-sectional view of a joint structure as a third embodiment of the present invention. [Figure 5] Figure 4 is a partially enlarged view of the joint structure shown. [Modes for carrying out the invention] 【0013】 Hereinafter, embodiments of the joint structure according to the present invention will be illustrated with reference to the drawings. Common components in each figure are denoted by the same reference numerals. 【0014】 Figure 1 shows a joint structure 10 as a first embodiment of the joint structure according to the present invention. The joint structure 10 comprises a first building member 11, a second building member 12, and a plate material 13 that joins the first building member 11 and the second building member 12. 【0015】 The first building component 11 may be, for example, an exterior cladding material for an exterior wall that separates the indoor space from the outdoor space of a building. The cladding material may be made of autoclaved lightweight concrete (ALC). The cladding material may be metal or ceramic siding, extruded cement board, wood-based panel, etc. However, the first building component 11 is not limited to cladding material. The first building component 11 is not particularly limited and may be another building component, for example, a foamed resin-based insulation material such as phenolic foam. 【0016】 The second building member 12 may be, for example, an exterior finishing material for an outer wall that partitions an indoor space and an outdoor space of a building. The exterior finishing material may be made of lightweight autoclaved aerated concrete (ALC). The exterior finishing material may be a metal-based or ceramic siding, an extruded cement board, a wood-based panel, or the like. The second building member 12 is not particularly limited and may be another building member such as a sash frame, a sealing material, or the like. The sash frame may be, for example, a resin or aluminum frame. The sealing material may be, for example, a wet joint filler made of resin such as silicone-based, urethane-based, or acrylic-based. 【0017】 The plate member 13 includes a fixing surface 13a1 that is fixed to the second building member 12. Further, the fixing strength between the fixing surface 13a1 of the plate member 13 and the second building member 12 is greater than the fixing strength between the first building member 11 at a position on the opposite side of the fixing surface 13a1 of the plate member 13. Hereinafter, for convenience of explanation, the position on the opposite side of the fixing surface 13a1 of the plate member 13 will be described as the "weak fixing surface 13a2". The plate member 13 is fixed to the first building member 11 at a position different from the weak fixing surface 13a2. 【0018】 More specifically, in the present embodiment, the plate member 13 includes an intervening plate portion 13a interposed between the first building member 11 and the second building member 12, and an extending plate portion 13b extending from the intervening plate portion 13a. The plate member 13 may be made of resin such as polyvinyl chloride. The intervening plate portion 13a is interposed between the first building member 11 and the second building member 12. The extending plate portion 13b is perpendicular to the intervening plate portion 13a in the cross-sectional view shown in FIG. 1 and may extend along a portion of the first building member 11 that does not face the second building member 12. 【0019】 The intervening plate portion 13a has the above-described fixing surface 13a1 on the surface facing the second building member 12. 【0020】 Further, the intervening plate portion 13a has the above-described weak fixing surface 13a2 in a region on the surface facing the first building member 11 that is opposite to the fixing surface 13a1. 【0021】 Here, the statement that the fixing strength of the weak fixing surface 13a2 is less than the fixing strength of the fixing surface 13a1 means, for example, that when the first building member 11 and the second building member 12 are pulled apart in a direction perpendicular to the fixing surface 13a1 and the weak fixing surface 13a2, such that the distance between them increases at a constant speed, for example, at a speed of 5 mm per minute, a gap occurs between the first building member 11 and the weak fixing surface 13a2 before a gap occurs between the second building member 12 and the fixing surface 13a1. For example, if the first building member 11 and the weak fixing surface 13a2 are fixed, and the second building member 12 and the fixing surface 13a1 are fixed, then the fixing between the first building member 11 and the weak fixing surface 13a2 breaks before the fixing between the second building member 12 and the fixing surface 13a1. The same applies to the fixing of the fixed surface 23a1 or the weakly fixed surface 23a2 in Figure 3, which will be described later. Furthermore, the same applies to the fixing of the fixed surface 33a1 or the weakly fixed surface 33a2 in Figure 4. 【0022】 The fixing surface 13a1 to the second building member 12, and the fixing of the weakly fixing surface 13a2 to the first building member 11 can be done by bonding using, for example, an adhesive 14. However, the weakly fixing surface 13a2 of the intervening plate portion 13a is not limited to being fixed to the first building member 11. In that region, the weakly fixing surface 13a2 of the intervening plate portion 13a does not need to be fixed to the first building member 11. 【0023】 The fixed surface 13a1 or the weakly fixed surface 13a2 is located between the first building member 11 and the second building member 12. 【0024】 The extended plate portion 13b is fixed to the first building member 11 by the fixing portion 13c. This fixing can be done, for example, by bonding with an adhesive. In other words, the plate material 13 is fixed to the first building member 11 at a position different from the intervening plate portion 13a which has a weak fixing surface 13a2. This fixing is configured to prevent liquids such as rainwater from entering between the plate material 13 and the first building member 11. Furthermore, the strength of this fixing is ensured so that the fixing does not come undone even if relative displacement occurs between the first building member 11 and the second building member 12. 【0025】 The behavior of the joint structure 10 when relative displacement occurs between the first building member 11 and the second building member 12 due to earthquakes, strong winds, etc. will be explained below. In particular, the behavior when displacement occurs in the direction in which the distance between the first building member 11 and the second building member 12 increases (left-right direction in Figure 1) will be explained with reference to Figure 2. Note that the behavior described below is also the same for the embodiment shown in Figure 3, which will be described later. 【0026】 When displacement occurs in the direction that increases the distance between the first building member 11 and the second building member 12 (the left-right direction in Figures 1 and 2), a tensile load is applied to the fixed surface 13a1 and the weak fixed surface 13a2 shown in Figure 1. Here, since the fixing strength of the weak fixed surface 13a2 is less than that of the fixed surface 13a1, the fixing of the weak fixed surface 13a2 is released, as shown in Figure 2, and the plate material 13 peels off from the first building member 11. On the other hand, the fixing between the plate material 13 and the second building member 12 at the fixed surface 13a1 is maintained. In order for this action to be carried out reliably, it is preferable to make the fixing strength of the weak fixed surface 13a2 sufficiently smaller than the fixing strength of the fixed surface 13a1. 【0027】 Furthermore, the plate material 13 deforms by bending in the out-of-plane direction as shown in Figure 2. In this embodiment, the intervening plate portion 13a deforms by bending such that the angle between the intervening plate portion 13a and the extended plate portion 13b becomes larger. As described above, the strength of the fixing between the extended plate portion 13b and the first building member 11 at the fixing portion 13c is such that the fixing does not come undone even if relative displacement occurs between the first building member 11 and the second building member 12. Therefore, the extended plate portion 13b remains fixed to the first building member 11. 【0028】 Thus, when displacement occurs such that the first building member 11 and the second building member 12 move apart relative to each other, the fixing at the fixing surface 13a1 is maintained, and the waterproof line of the building at the position of the fixing surface 13a1 is maintained. Furthermore, even if the fixing of the weak fixing surface 13a2 is released and a gap is formed between the weak fixing surface 13a2 and the first building member 11, the extended plate portion 13b is fixed to the first building member 11 at the fixing portion 13c, so water is prevented from entering between the extended plate portion 13b and the first building member 11. In other words, the waterproof line of the building at the position of the weak fixing surface 13a2 is also maintained. In this way, the joint structure 10 can maintain the waterproof line when displacement occurs in a direction that increases the distance between the first building member 11 and the second building member 12. 【0029】 Figure 3 shows a joint structure 20 as a second embodiment of the joint structure according to the present invention. More specifically, Figure 3 shows details of the exterior wall 101 of a building 100 including the joint structure 20. Figure 3 is a horizontal cross-sectional view of the exterior wall 101 of the building 100. As will be described in detail later, the first building member 11 in this embodiment is the exterior wall 101, and the second building member 12 is the sealing material 22a. 【0030】 First, let's describe the outline of building 100. In this embodiment, building 100 is, for example, a two-story detached house with a wooden frame. Although building 100 in this embodiment is a detached house, it may also be, for example, an apartment building with multiple dwelling units. Furthermore, there are no particular limitations on the number of floors of building 100. For example, building 100 may have three or more floors. 【0031】 The building 100 of this embodiment comprises a reinforced concrete foundation and a superstructure supported by the foundation, which has a frame structure composed of framing members such as columns and beams. The superstructure of this embodiment has a wooden frame structure, but it may also have a steel frame structure, for example, and its structure is not particularly limited. 【0032】 More specifically, the superstructure of the building 100 in this embodiment comprises the aforementioned timber frame and the exterior wall 101. 【0033】 The exterior wall 101 is a wall that separates the indoor space from the outdoor space of the building 100. As shown in Figure 1, the exterior wall 101 of the building 100 in this embodiment comprises studs 21a, a base material 21b, a cavity insulation material 21c, a waterproof sheet 21d, and an exterior insulation material 21e as the first building member 11. 【0034】 A base material 21b is placed on the exterior side of the studs 21a and fastened to the studs 21a with fasteners such as screws. The cavity insulation material 21c is filled into the space between the studs 21a on the interior side of the base material 21b. The cavity insulation material 21c may be a fibrous insulation material such as rock wool or glass wool. 【0035】 Furthermore, as shown in Figure 3, the waterproof sheet 21d may be laminated on the outdoor side of the base material 21b. The exterior insulation material 21e is placed on the outdoor side of the waterproof sheet 21d and fastened to the studs 21a with fasteners such as screws 24. The exterior insulation material 21e is a foamed resin panel-shaped insulation material such as phenolic foam. On the outdoor side of the exterior insulation material 21e, the outer surface layer 26 of the exterior wall 101 is formed, for example, with a finishing coating material. The ends of the exterior insulation material 21e in the width direction (left-right direction in Figure 3) are covered with board material 23. Details of this will be described later. 【0036】 As shown in Figure 3, an opening 101a is formed in the exterior wall 101. Examples of openings 101a in the exterior wall 101 include windows and doorways. The opening 101a shown in Figure 3 is an example of a window, but it could also be a doorway that allows movement between the indoor space and the outdoor space. 【0037】 An opening 101a in the exterior wall 101 contains a sash frame 1 and a panel material 2 fitted into the sash frame 1. A cylindrical backup material 22b is sandwiched between the plate material 23 and the sash frame 1. Sealing material 22a is filled into the outdoor side (upper side in Figure 3) of the backup material 22b. As described above, the configuration of the second building member 12 is not particularly limited, and in this embodiment, the sealing material 22a constitutes the second building member 12. 【0038】 The sash frame 1 is installed so as to cover the inner end surface of the opening 101a in the exterior wall 101. In this embodiment, a sash, which serves as a panel material 2, is fitted into the sash frame 1. 【0039】 The shoji screen, as panel material 2, includes, but is not limited to, a triple-layered glass plate 5 and a frame portion 6 attached to the periphery of the glass plate 5. The panel material 2 may also be, for example, a flat plate without glass plates 5. Furthermore, the panel material 2 may be, for example, a fixed structure that is secured to the sash frame 1 so as not to move. 【0040】 The sash frame 1 may be made of metal such as aluminum, may be made of resin, or may be a composite sash frame containing both metal and resin. 【0041】 As shown in Figure 3, the sash frame 1 is fastened to the stud 21a by fastening members such as screws 27a and 27b. 【0042】 As described above, the exterior wall 101 of the building 100 is equipped with an exterior insulation material 21e as a first building component 11. The exterior wall 101 of the building 100 is also equipped with a sealing material 22a as a second building component 12. Furthermore, the exterior wall 101 of the building 100 is equipped with a board material 23 interposed between the exterior insulation material 21e and the sealing material 22a. 【0043】 The plate material 23 joins the exterior insulation material 21e and the sealing material 22a. More specifically, the plate material 23 comprises an intervening plate portion 23a interposed between the exterior insulation material 21e and the sealing material 22a, and an extended plate portion 23b extending from the intervening plate portion 23a. The plate material 23 may be made of a resin such as polyvinyl chloride. The intervening plate portion 23a extends along the end face of the exterior insulation material 21e, which is the first building member 11. The extended plate portion 23b, in the cross-sectional view shown in Figure 3, is perpendicular to the intervening plate portion 23a and may extend along the outer surface of the exterior insulation material 21e, which is the first building member 11. In other words, the plate material 23 covers the end portion, including the corner between the end face and the outer surface of the exterior insulation material 21e, which is the first building member 11. This prevents deformation and damage to the end portion due to contact, etc. 【0044】 Two extension plate portions 23b may be provided, each extending from both ends of the intervening plate portion 23a. In other words, the plate material 23 shown in Figure 3 has an L-shaped cross-section in the horizontal cross-section, but it may also have a U-shaped cross-section in the same cross-section. In this case, the intervening plate portion 23a of the plate material 23 covers the end face of the exterior insulation material 21e, which is the first building member 11. Furthermore, one extension plate portion 23b extends along the outer surface of the exterior insulation material 21e, which is the first building member 11, and the other extension plate portion 23b extends along the inner surface of the exterior insulation material 21e, which is the first building member 11. In this way, the plate material 23 may cover not only the corner between the end face and the outer surface of the exterior insulation material 21e, which is the first building member 11, but also the corner between the end face and the inner surface of the exterior insulation material 21e, which is the first building member 11. 【0045】 The intervening plate portion 23a is fixed to the sealing material 22a, which is the second building member 12, on a fixed surface 23a1 which is, for example, the entire surface facing the sealing material 22a. 【0046】 Of the surfaces of the intervening plate portion 23a facing the exterior insulation material 21e, which serves as the first building member 11, the region opposite to the fixing surface 23a1 includes a weak fixing surface 22a2 that is fixed to the exterior insulation material 21e, which serves as the first building member 11, with a fixing strength less than that of the fixing surface 23a1. 【0047】 The fixing surface 23a1 or the weak fixing surface 23a2 can be fixed by, for example, adhesive bonding. The fixing surface 23a1 is bonded to the wet sealant 22a without adhesive. In other words, the fixing surface 23a1 may be bonded to the sealant 22a by the viscosity of the sealant 22a. The weak fixing surface 23a2 of the intervening plate portion 23a is not limited to being fixed to the exterior insulation material 21e. In that region, the weak fixing surface 22a2 of the intervening plate portion 23a does not need to be fixed to the exterior insulation material 21e as the first building member 11. 【0048】 The fixed surface 22a1 or the weakly fixed surface 22a2 extends along the depth direction (the direction perpendicular to the plane of the paper in Figure 3) of the intervening plate portion 23a and the sealing material 22a. In other words, the fixed surface 23a1 or the weakly fixed surface 23a2 extends along the inner end surface of the opening 101a. 【0049】 The extended plate portion 23b is fixed to the exterior insulation material 21e, which is the first building member 11, by the fixing portion 23c. This fixing can be done, for example, by bonding with an adhesive. This fixing may prevent liquids such as rainwater from penetrating between the plate material 23 and the exterior insulation material 21e, which is the first building member 11. 【0050】 Figure 4 shows a joint structure 30 as a third embodiment of the joint structure according to the present invention. More specifically, Figure 4 is a horizontal cross-sectional view of the exterior wall 102 of a building 100 including the joint structure 30. Note that the exterior wall 102 shown in Figure 4 may be the same exterior wall as the exterior wall 101 shown in Figure 3. 【0051】 As will be described in more detail later, the first building component 11 in this embodiment is an exterior insulation material 31e, and the second building component 12 is a sealing material 32a. 【0052】 The exterior wall 102 is a wall that separates the indoor space from the outdoor space of the building 100. In this embodiment, the exterior wall 102 comprises a base material 31b, a cavity insulation material 31c, a waterproof sheet 31d, and an exterior insulation material 31e as the first building member 11. 【0053】 The cavity insulation material 31c is filled into the interior side of the substrate material 31b. The cavity insulation material 31c may be a fibrous insulation material such as rock wool or glass wool. 【0054】 Furthermore, as shown in Figure 4, the waterproof sheet 31d may be laminated on the outdoor side of the base material 31b. 【0055】 The exterior insulation material 31e is placed on the exterior side of the waterproof sheet 31d and may be fastened to the studs with fasteners such as screws. The exterior insulation material 31e is a foamed resin panel-type insulation material such as phenolic foam. The exterior surface layer of the exterior wall 102 may be formed on the exterior side of the exterior insulation material 31e, for example, with a finishing coating material. The ends of the exterior insulation material 31e in the width direction (vertical direction in Figure 4) are covered with board material 33. Details of this will be described later. 【0056】 As shown in Figure 4, an opening 102a is formed in the exterior wall 102. The opening 102a may penetrate the insulation material 31c. An air conditioner sleeve, ventilation opening, etc., may pass through the opening 102a. The opening 102a shown in Figure 4 is an example of an equipment opening, but it may be a window, doorway, air conditioning duct, etc. 【0057】 The cross-section of the opening 102a (perpendicular to the plane of the paper in Figure 4) is, for example, circular. The cross-section of the opening 102a may be of other shapes, such as rectangular. 【0058】 Equipment piping 35 is placed in the opening 102a of the exterior wall 102. The equipment piping 35 may protrude from the exterior insulation material 31e. The equipment piping 35 may be cylindrical. The equipment piping 35 may be made of metal or resin. 【0059】 A backing material 32b, for example, an annular shape, is sandwiched between the plate material 33 and the equipment piping 35. The outdoor side of the backing material 32b is filled with a sealing material 32a. As described above, the configuration of the second building member 12 is not particularly limited, and in this embodiment, the sealing material 32a constitutes the second building member 12. 【0060】 An airtight seal 38 may be attached to the outer surface of the equipment piping 35. The airtight seal 38 may seal the space between the equipment piping 35 and the waterproof sheet 31d. The airtight seal 38 may be made of rubber. 【0061】 As described above, the exterior wall 102 of the building 100 is equipped with an exterior insulation material 31e as a first building component 11. The exterior wall 102 of the building 100 is also equipped with a sealing material 32a as a second building component 12. Furthermore, the exterior wall 102 of the building 100 is equipped with a board material 33 interposed between the exterior insulation material 31e and the sealing material 32a. 【0062】 The plate material 33 joins the exterior insulation material 31e and the sealing material 32a. More specifically, the plate material 33 comprises an intervening plate portion 33a that is interposed between the exterior insulation material 31e and the sealing material 32a, and an extended plate portion 33b that extends from the intervening plate portion 33a. The plate material 33 may be made of a resin such as polyvinyl chloride. 【0063】 The intervening plate portion 33a extends along the end face of the exterior insulation material 31e, which is the first building member 11. The intervening plate portion 33a may extend beyond the backup material 32b. The intervening plate portion 33a may be rectangular in shape in plan view. 【0064】 The extended plate portion 33b is perpendicular to the intervening plate portion 33a in the cross-sectional view shown in Figure 4 and may extend along the outer surface of the exterior insulation material 31e, which is the first building member 11. In other words, the plate material 33 covers the end portion, including the corner between the end face and the outer surface of the exterior insulation material 31e, which is the first building member 11. This prevents deformation and damage to the end portion due to contact, etc. The extended plate portion 33b may be rectangular in shape in plan view. 【0065】 As shown in Figure 5, multiple plate members 33 may be arranged around the opening 102a. A radially spreading gap 33s may be formed between the extended plate portion 33b of plate member 33 and the extended plate portion 332b of plate member 332 adjacent to plate member 33. There does not need to be a gap between the intervening plate portion 33a of plate member 33 and the intervening plate portion of plate member 332 adjacent to plate member 33. 【0066】 For example, if the cross-section of the opening 102a is rectangular, one plate material 33 may be placed along each side of the rectangle. 【0067】 Referring to Figure 5, through holes 33h may be formed in at least one (both in this embodiment) of the intervening plate portion 33a and the extended plate portion 33b of the plate material 33. The through holes 33h may be circular in shape. Multiple through holes 33h may be arranged in a polka-dot pattern. In particular, forming through holes 33h in the extended plate portion 33b strengthens the adhesive fixing of the extended plate portion 33b to the outer insulation material 31e (described later). 【0068】 Referring to Figure 4, the intervening plate portion 33a is fixed to the sealing material 32a, for example, on the entire fixed surface 33a1 which is the surface facing the sealing material 32a as the second building member 12. 【0069】 Of the surfaces of the intervening plate portion 33a facing the exterior insulation material 31e, which serves as the first building member 11, the region opposite to the fixing surface 33a1 includes a weak fixing surface 33a2 that is fixed to the exterior insulation material 31e, which serves as the first building member 11, with a fixing strength less than that of the fixing surface 33a1. 【0070】 An example of a method for fixing the intervening plate portion 33a to the sealant 32a and the exterior insulation material 31e is as follows: The sealant 32a before hardening is poured onto the fixing surface 33a1 of the plate material 33. The sealant 32a passes through the through hole 33h of the plate material 33 and flows onto the weak fixing surface 33a2 on the opposite side of the fixing surface 33a1. Because the adhesion of the weak fixing surface 33a2 to the sealant 32a is less than the adhesion of the fixing surface 33a1 to the sealant 32a, the fixing strength of the weak fixing surface 33a2 may be less than that of the fixing surface 33a1. 【0071】 The weakly fixed surface 33a2 of the intervening plate portion 33a is not limited to being fixed to the exterior insulation material 31e. In other words, the weakly fixed surface 33a2 of the intervening plate portion 33a does not need to be fixed to the exterior insulation material 31e as the first building member 11 in that region. 【0072】 The fixed surface 33a1 or the weakly fixed surface 33a2 extends along the depth direction (the direction perpendicular to the plane of the paper in Figure 4) of the intervening plate portion 33a and the sealing material 32a. In other words, the fixed surface 33a1 or the weakly fixed surface 33a2 extends along the inner circumferential surface of the opening 102a. 【0073】 The extended plate portion 33b is fixed to the exterior insulation material 31e, which is the first building member 11, by the fixing portion 33c. This fixing can be done, for example, by bonding with an adhesive. This fixing may prevent liquids such as rainwater from penetrating between the plate material 33 and the exterior insulation material 31e, which is the first building member 11. 【0074】 The behavior of the joint structure 30 when relative displacement occurs between the first building member 11 and the second building member 12 is the same as that of the joint structures 10 or 20 shown in Figures 1 to 3. Relative displacement can be caused by earthquakes, strong winds, etc. Relative displacement can also be caused by the contraction of the sealing material 32a or backup material 32b over time. [Explanation of symbols] 【0075】 1: Window frame 2: Panel material 5: Glass plate 6: Frame 10,20,30:Joint structure 100: Building 101: Exterior wall 101a: Opening 11: First building component 12: Second building component 13: Board material 13a: Interposed plate part 13a1,13a2: Fixed surface 13b: Extension plate part 13c: Fixed part 14: Adhesive 21a: Studs 21b, 31b: Base material 21c, 31c: Filling insulation material 21d, 31b: Waterproof sheet 21e, 31e: Exterior insulation material (an example of the first building component) 22a, 32a: Sealing material (an example of a second building component) 22b, 32b: Backup material 23,33,332: Board material 23a, 33a: Interposed plate part 23a1, 23a2, 33a1, 33a2: Fixed surface 23b, 33b: Extension plate part 23c, 33c: Fixed part 24: Screws 26: Outer surface layer 27: Screw 33h: Through hole 33s: Gap 35: Equipment Piping 38: Airtight sealant

Claims

[Claim 1] The first building component and The second building component, The invention comprises a plate material for joining the first building member and the second building member, The aforementioned plate material has a fixing surface that is fixed to the second building member, The fixing strength between the fixing surface of the plate material and the second building member is greater than the fixing strength between the plate material and the first building member at the position on the back side of the fixing surface. The aforementioned plate material is fixed to the first building member at a position on the back side of the fixing surface that is different from the position on the back side of the fixing surface, in a joint structure. [Claim 2] The joint structure according to claim 1, wherein the first building member is not fixed to the plate material at a position on the back side of the fixing surface. [Claim 3] The joint structure according to claim 1 or 2, wherein the plate material deforms in the out-of-plane direction. [Claim 4] The joint structure according to claim 1 or 2, wherein the plate material covers the end of the first building member. [Claim 5] The joint structure according to claim 1 or 2, wherein the first building member includes an insulating material.

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