Joining structure and joining method

Abstract

To provide a joining structure and a joining method dispensing with torque management of fastening of a tapping screw and improving design.SOLUTION: A joint structure for joining a mullion 10 of a curtain wall and a transom 20 includes a backup material 51 provided inside an end portion of the transom 20, a first sealing material 61 provided in an end portion space of the transom 20 formed by the end portion of the transom 20 and the backup material 51, and a second sealing material 62 applied so as to straddle the end portion of the transom 20 and the first sealing material 61. The second sealing material 62 is arranged around the joining part of the mullion 10 and the transom 20, and the backup material 51 is not exposed to the outside in the joining part of the mullion 10 and the transom 20, and is housed inside the joining part of the mullion 10 and the transom 20.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a joining structure and a joining method. [Background technology]

[0002] BACKGROUND ART A configuration is known in which a dry elastic sealing material is used in a curtain wall to stop water from leaking (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-155176 Summary of the Invention [Problem to be solved by the invention]

[0004] When using the above-mentioned conventional dry elastic sealant, the elastic sealant is compressed to form a tight seal and achieve a watertight effect, but this compression is achieved by tightening a tapping screw. Therefore, proper compression requires torque control when tightening the tapping screw. Furthermore, because the dry elastic sealant is exposed in a visible position, improvements in design are required.

[0005] The present disclosure aims to provide a joining structure and joining method that do not require torque management for tightening tapping screws and that have improved design. [Means for solving the problem]

[0006] The present disclosure relates to a joint structure for joining a curtain wall upright and a transom, comprising: a backup material provided inside the end of the transom; a first sealant provided in the end space of the transom formed by the end of the transom and the backup material; and a second sealant applied so as to straddle the end of the transom and the first sealant, wherein the second sealant is provided around the periphery of the joint between the upright and the transom, and the backup material is not exposed to the outside at the joint between the upright and the transom but is contained inside the joint between the upright and the transom. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an enlarged perspective view showing the joint between the mullions and the transom of an embodiment of the curtain wall. [Figure 2] FIG. 2 is an enlarged vertical cross-sectional view showing an embodiment of a curtain wall. [Figure 3] FIG. 1 is an exploded perspective view showing the state before the mullions and crosspieces of a curtain wall of one embodiment are joined together. [Figure 4] FIG. 1 is a side view showing a backup material inside the interlock of an embodiment of a curtain wall. [Figure 5] FIG. 1 is a front view showing a backup material inside the interlock of an embodiment of a curtain wall. [Figure 6] FIG. 10 is a perspective view showing a state in which a second sealing material is provided at the interlocking end of a curtain wall of one embodiment. [Figure 7] 1 is a cross-sectional schematic diagram showing a state in which a first sealant and a second sealant are provided at the interlocking end of a curtain wall of one embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In this specification, the term "visible direction" refers to the surface direction of the glass 30 in the curtain wall of a building, and the term "visible direction" refers to the thickness direction of the glass 30. The term "visible direction" also refers to the indoor-outdoor direction. The term "visible surface" refers to the surface of the glass 30 facing the outdoor side and the indoor side, respectively, and the term "visible surface" refers to the surface extending in the indoor-outdoor direction of the mullions and transoms that make up the curtain wall. In the drawings, the outdoor side of the glass 30 is referred to as the outdoor side X1, and the side of the glass 30 closer to the indoor side is referred to as the indoor side X2.

[0009] In the joining structure and joining method of this embodiment, the mullions 10 joined to the mullions 20 are metal members made of aluminum or the like that form the vertical members of the curtain wall. The mullions 20 are connected and joined to the mullions 10 that extend vertically. Glass 30 is placed in the space surrounded by the mullions 10 and the mullions 20.

[0010] As shown in Fig. 1 etc., the mullion 10 has a hollow structure (or solid structure) including a main body 101 with a hollow portion 102 and a glass holding portion 103. As shown in Fig. 3, the visible surface of the main body 101 of the mullion 10 is flat. The visible surface of the main body 101 is formed with a through-hole 112 through which a tapping screw 111 (see Fig. 6) passes for fixing the transom 20 to the mullion 10, and a through-hole 113 that connects the hollow portion 102 with the outside of the mullion 10 to allow ventilation and the flow of liquids such as rainwater. The diameter of the through-hole 113 is larger than the diameter of the through-hole 112, for example, about 14 mm.

[0011] The glass holding portion 103 extends toward the outside X1 at the end of the main body 101 of the mullion 10 on the outside X1 side. The glass holding portion 103, together with a not-shown ledge fixed to the mullion 10, forms a C-shaped horizontal glass groove that opens toward the viewing direction and holds the glass 30.

[0012] The transom 20 is a metal member made of aluminum or the like that forms a horizontal frame fixed to the visible surfaces on both the left and right sides of the mullions 10. As shown in Figures 1 and 2, the transom 20 comprises a transom main body 211 located on the indoor side X2 and a glass holding part 212 located on the outdoor side X1. At the end of the glass holding part 212 on the outdoor side X1, a hook-shaped part 2212 of a central part 2211 of a bezel 221 that is T-shaped in cross section as shown in Figure 2 engages with a hook-shaped part 2121 provided on the underside of the glass holding part 212, and an upper protrusion 2215 of the central part 2211 of the bezel 221 engages with the edge of the outdoor side X1 of the glass holding part 212, thereby fixing the bezel 221 to the glass holding part 212.

[0013] The transom main body 211, the glass holding part 212, and the upper part 2213 of the flange 221 form a space 201 that constitutes a C-shaped vertical glass groove that opens upward. The transom main body 211, the glass holding part 212, and the lower part 2214 of the flange 221 form a space 202 that constitutes a C-shaped vertical glass groove that opens upward.

[0014] The lower end of the glass 30 (30-1) is inserted into the space 201. A seal made up of a silicone sealant (structural silicone sealant) 311 and a spacer gasket 312 is disposed between the lower end of the glass 30-1 and the transom body 211. An outer glazing gasket material 315 is disposed between the lower end of the glass 30-1 and the upper part 2213 of the ledge 221.

[0015] As a result, the lower end of the glass pane 30-1 is supported between the transom main body 211 and the flange 221 via the silicone sealant 311, the spacer gasket 312, and the outer glazing gasket material 315. As shown in Figure 2, the glass pane 30-1 is a laminated glass formed by bonding together two identical rectangular glass panes 31 with an interlayer film 32 sandwiched between them.

[0016] The upper end of the glass 30 (30-2) is inserted into the space 202. A seal made up of a silicone sealant (structural silicone sealant) 311 and a spacer gasket 312 is disposed between the upper end of the glass 30-2 and the transom body 211. An outer glazing gasket material 315 is disposed between the upper end of the glass 30-2 and the lower part 2214 of the ledge 221.

[0017] As a result, the upper end of the glass 30-2 is supported between the transom main body 211 and the flange 221 via the silicone sealant 311, the spacer gasket 312, and the outer glazing gasket material 315. As shown in Figure 2, the glass 30-2 is a double-glazed glass consisting of two identical rectangular glass plates 31 joined together via a metal spacer 41 made of aluminum or the like and a sealant 42 made of butyl rubber that is provided in close contact with the spacer 41.

[0018] The eyelet-less main body 211 has a hollow structure with a hollow portion 2111. Tapping holes H11, H12, H13, H14, H15, and H16 are formed in the periphery 2114 of an opening 2110 (see FIG. 3) at the end of the eyelet-less main body 211 in the longitudinal direction.

[0019] A backup material 51 is inserted into a hollow portion 2111 at the longitudinal end of the eyelet main body 211, which has a hollow structure. The backup material 51 is made of a material that can be elastically deformed when compressed. In this embodiment, for example, Evaform (registered trademark) or the like is used as the backup material 51. The backup material 51 is in a compressed state and inserted into the hollow portion 2111 through an opening 2110 at the longitudinal end of the eyelet main body 211, and is arranged so as to close the opening 2110.

[0020] As shown in Fig. 4, the backup material 51 is formed in a shape having many corners that follow the shape of the hollow portion 2111 when viewed in the longitudinal direction of the transom main body 211. The central portion 511 of the backup material 51 shown in Fig. 4 is configured to be one step higher than the peripheral portion 512, as shown in Fig. 5. As a result, the end space formed between the central portion 511 and the opening 2110 at the end of the transom main body 211 in the longitudinal direction forms a groove 2112 (see Figs. 3 and 7) that surrounds the opening 2110 with the peripheral portion 512 as its bottom.

[0021] This allows the backup material 51 to position the wet first sealant 61 and second sealant 62 (described later) in the predetermined positions, ensuring a reliable seal. Furthermore, by filling and positioning the first sealant 61 in the groove 2112, it is possible to reduce the amount of first sealant 61 to be filled to an appropriate amount, making it easier to apply pressure to the seal. It also makes it possible to prevent the backup material 51 from slipping off. As a result, it is possible to stabilize the quality of the seal.

[0022] When the transom 20 is joined to the mullion 10, the portion of the backup material 51 facing the through-hole 113 of the mullion 10 has a through-hole 513 (see Figure 3) that connects the hollow portion 2111 of the transom main body 211 to the outside of the transom main body 211, allowing air to pass through and allowing liquids such as rainwater to flow through. The diameter of the through-hole 513 is the same as the diameter of the through-hole 113 of the mullion 10, for example, about 14 mm.

[0023] This allows rainwater that has entered the hollow portion 2111 of the transom body 211 of the transom 20 to flow through the through-hole 513 into the hollow portion 102 of the body 101 of the mullion 10. Furthermore, because the diameter of the through-hole 513 is large, it is possible to equalize the pressure in the hollow portion 2111 of the transom body 211 of the transom 20 and the pressure in the hollow portion 102 of the body 101 of the mullion 10. In addition, because air can be circulated through the through-hole 113 of the mullion 10 to the first sealant 61 and second sealant 62 (described below) provided on the backup material 51, it is possible to dry and harden the wet first sealant 61 and second sealant 62 in a shorter time.

[0024] This makes it possible to prevent a pressure difference from occurring between the hollow portion 2111 and the hollow portion 102, and even if rainwater does infiltrate the hollow portion 2111, it is possible to eliminate the possibility of internal water leakage to the indoor side X2 due to a pressure difference. Furthermore, if rainwater does infiltrate the hollow portion 2111, it is possible to have the rainwater quickly flow through the through holes 513 and 113 into the hollow portion 102 of the mullion 10, and to drain the rainwater to the outside of the mullion 10 through the hollow portion 102. Furthermore, because the through holes 513 and 113 are located away from the lower frame to which the lower end of the mullion 10 is connected, it is possible to prevent rainwater from outside the mullion 10 from flowing back through the through holes 513 and 113.

[0025] As shown in Figure 3, etc., an arc-shaped recessed notch 2113 is formed in the end edge of the longitudinal end of the transom main body 211 (the peripheral edge 2114 of the opening 2110) toward the center of the transom 20 in the longitudinal direction.

[0026] At the joint between the mullion 10 and the transom 20, even if the first sealant 61 and second sealant 62 described below are provided, so-called metal touch occurs, in which the mullion 10 and the transom 20 come into direct contact. However, by forming the cutout 2113, it is possible to connect the first sealant 61 and the second sealant 62 to the silicone sealant 311 (see FIG. 2) by covering them at the cutout 2113. As a result, it is possible to cut the continuous metal touch at the position of the cutout 2113. Therefore, it is possible to prevent rainwater that flows from the outside side X1 along the metal touch portion by capillary action from further entering the inside side X2 at this position.

[0027] As shown in FIGS. 6 and 8, the groove 2112 is filled by applying a wet first sealant 61 made of a one-component silicone sealant. The first sealant is filled around the entire circumference of the groove 2112. A wet second sealant 62 made of the same one-component silicone sealant as the first sealant 61 is applied in a mound so as to straddle the first sealant and the edge of the longitudinal end of the transom main body 211 (the periphery 2114 of the opening 2110). The second sealant is applied along the first sealant and the periphery 2114 of the opening 2110 at the longitudinal end of the transom main body 211, covering the entire periphery of the first sealant and the opening 2110.

[0028] The second sealant 62 is applied so as to straddle the first sealant 61 and the periphery 2114 of the opening 2110 in the longitudinal direction of the transom body 211, so that when the transom 20 is joined to the mullion 10, the second sealant 62 is sandwiched between the mullion 10 and the transom 20 and protrudes from the joint, and is provided around the joint between the mullion 10 and the transom 20. As a result, the second sealant 62 provides a sufficient seal, making it unnecessary to control the torque when tightening the tapping screws 111, and making it possible to achieve a highly waterproof seal.

[0029] Furthermore, when the transom 20 is joined to the mullion 10, the backup material 51 is housed inside the hollow portion 2111 of the transom 20 joined to the mullion 10, and is not exposed to the outside of the joined portion. This makes it possible to improve the design of the joint between the mullion 10 and the transom 20.

[0030] Next, we will explain the joining method for joining the mullions 10 and the transom 20 that make up the curtain wall. In the joining method, first, at the factory where the mullions 10 and the transom 20 are manufactured, a process is carried out in which a backup material 51 is inserted and positioned inside the end of the transom 20. Specifically, the compressed backup material 51 is inserted from the opening 2110 at the end of the transom 20 into the hollow space 2111, and as shown in Figure 3, the backup material 51 is positioned in the hollow space 2111 inside the opening 2110 at the end of the transom 20.

[0031] Next, at the factory, a step is carried out in which a first sealant 61 is placed in the end space of the transom 20 formed by the end of the transom 20 and the backup material 51. Specifically, the first sealant 61 is filled and placed around the entire circumference of a groove 2112 formed between the central portion 511 of the backup material 51 at the end of the transom 20 and the opening 2110 at the end in the longitudinal direction of the transom main body 211, with the peripheral portion 512 as the bottom and surrounding the opening 2110.

[0032] Next, the mullions 10 and the transom 20 filled with the first sealant 61 are transported to the construction site, where a process is carried out in which the second sealant 62 is applied so as to straddle the end of the transom 20 and the first sealant 61. Specifically, as shown in Fig. 7, the second sealant 62 is applied so as to cover both the periphery 2114 of the opening 2110 of the transom main body 211 of the transom 20 and the first sealant 61 filled in the groove 2112, thereby providing the second sealant 62.

[0033] Next, at the construction site, a process is carried out in which the transom 20 to which the second sealant 62 has been applied is joined to the mullion 10. Specifically, a tapping screw 111 is passed through the through hole 112 of the mullion 10 and screwed into the tapping holes H11, H12, H13, H14, H15, and H16 of the transom 20, thereby fixing and joining the transom 20 to which the second sealant 62 has been applied to the mullion 10.

[0034] As a result, the second sealant 62 is crushed and spread out, protruding from the joint between the mullions 10 and the transom 20, and is provided around the joint between the mullions 10 and the transom 20. As a result, the first sealant 61 and the second sealant 62 can reliably seal the joint between the mullions 10 and the transom 20.

[0035] Although a preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and can be modified as appropriate.

[0036] For example, in this embodiment, the backup material 51 has the central portion 511 configured to be one step higher than the peripheral portion 512, but this configuration is not limited to this. For example, the backup material may have a flat end surface with the peripheral portion and the central portion at the same height. In this case, the groove 2112 formed in this embodiment is not formed.

[0037] In this embodiment, the first sealant 61 and the second sealant 62 are formed of the same one-component silicone sealant and applied by coating, but this is not limiting. For example, a dry sealant may be used as the first sealant. Even in this case, since the wet second sealant 62 is applied at the construction site, torque control of the tapping screws 111 is not required, and watertightness can be improved.

[0038] In the present embodiment, the glass pane 30-1 is made of laminated glass, and the glass pane 30-2 is made of double-glazed glass, but this is not limiting. For example, the glass pane 30-1 may be replaced by double-glazed glass, or single-glazed glass, and an aluminum panel or a dry-laid stone panel. The glass pane 30-2 may be replaced by laminated glass, or single-glazed glass, and an aluminum panel or a dry-laid stone panel. [Explanation of symbols]

[0039] 10 mullion, 20 no-beam, 51 backup material, 61 first sealing material, 62 second sealing material, 113, 513 through hole, 2112 groove, 2113 notch

Claims

1. A joint structure that joins the mullions and crossbeams of a curtain wall, a backup material provided inside the interlocking end portion; a first sealing material provided in the open end space formed by the open end and the backup material; a second sealant applied across the seamless end and the first sealant; The second sealant is provided around the joint between the mullion and the crosspiece, A joint structure in which the backup material is not exposed to the outside at the joint between the upright and the transom but is contained inside the joint between the upright and the transom.

2. The joining structure according to claim 1 , wherein the end space formed by the end portion of the unmeshed joint and the backup material has a groove formed by the end portion of the unmeshed joint and the backup material.

3. The joining structure according to claim 1 , wherein the first sealant and the second sealant are made of a one-component silicone sealant.

4. 2. The joint structure according to claim 1, wherein the opposing mullions have through holes formed therein to allow air to pass through.

5. The joining structure according to claim 4 , wherein a through hole is formed in a portion of the backup material facing the through hole of the mullion.

6. 2. The joining structure according to claim 1, wherein a notch recessed toward the center of the transom in the longitudinal direction is formed at the end of the transom.

7. A joining method for joining a mullion and a crosspiece of a curtain wall, inserting and arranging a backup material inside the interlocking end portion; disposing a first sealant in the open end space formed by the open end and the backup material; applying a second sealant across the seamless end and the first sealant; and joining the blinds coated with the second sealant to the mullions.

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