Building device

Abstract

To provide a building device improved in water-tightness.SOLUTION: A building device includes a hollow member 1 having a hollow portion 3 and an end member 2. The end member 2 is attached to a longitudinal end portion of the hollow member 1, one of the hollow member 1 and the end member 2 is tucked into the other, and a water-absorbing layer 4 that absorbs water and swells is provided on at least one surface between an inner peripheral side of the tucking member and an outer peripheral side of the tucked member.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to architectural devices, such as sashes and lattices, which are used in construction and are constructed using hollow members. [Background technology]

[0002] 2. Description of the Related Art Architectural devices, such as sliding sashes, installed in openings of buildings are required to have improved watertightness. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE PRESENT EMBODIMENT In view of the above-mentioned circumstances, an object of the present invention is to provide a construction device having improved watertightness. [Means for solving the problem]

[0004] In order to achieve the above object, the construction device according to the invention described in claim 1 comprises a hollow member having a hollow portion and an end member, the end member being attached to the longitudinal end of the hollow member, one of the hollow member and the end member being encompassed by the other, and at least one surface between the inner peripheral side of the one encompassed and the outer peripheral side of the one encompassed has a water-absorbing layer that absorbs water and swells. Effect of the Invention

[0005] The building device according to the invention described in claim 1 comprises a hollow member having a hollow portion and an end member, the end member being attached to the longitudinal end of the hollow member, one of the hollow member and the end member being enveloped in the other, and at least one surface between the inner periphery of what is enveloped and the outer periphery of what is enveloped has a water-absorbing layer that absorbs water and swells, so that when the water-absorbing layer gets wet, it swells and closes the gap between the inner periphery of what is enveloped and the outer periphery of what is enveloped, thereby preventing water from entering through the gap and improving watertightness. [Brief description of the drawings]

[0006] [Figure 1] 1 is a cross-sectional view showing one embodiment of a construction device of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] (a) is a plan view of the airtight piece attached to the lower end of the inner screen door joint frame, (b) is a front view from the inside of the room, and (c) is a side view. [Diagram 5] These are cross-sectional views of the part where the airtight piece is embedded in the joint frame of an inner screen, (a) showing the normal state and (b) showing the state when the water-absorbing layer is swelled. [Figure 6] This is an enlarged front view of the lower part of the inner shoji screen on the side of the joint frame, showing the state in which the flow of water is blocked by the swollen waterproof tape. [Figure 7] As a comparative example, this is an enlarged front view of the lower part of the joint frame side of a conventional inner sash that does not have waterproof tape, showing the state in which water has passed over the airtight piece and entered the room. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 to 3 show an example of an architectural device according to the present invention, which is applied to a sliding sash installed in a window opening of a building. This sash has a frame 5 attached to the opening in the building frame, and an outer sash 6 and an inner sash 7 housed in the frame 5 in a sliding manner so that they can be opened and closed freely.

[0008] As shown in Fig. 3, the frame 5 is composed of an upper frame 8, a lower frame 9, and left and right vertical frames 10, 10, which are made of extruded aluminum alloy. As shown in Figs. 1 and 2, the upper frame 8 and the lower frame 9 have rails 11, 11 that protrude inward and guide the outer screen 6 and the inner screen 7, respectively.

[0009] As shown in FIG. 3, the outer screen 6 and the inner screen 7 are constructed by setting up an upper frame 12, a lower frame 13, a door end frame 14, and a door joint frame 1, all of which are made of extruded aluminum alloy, with glass 15 placed within the frame.

[0010] The inner screen 7 has a hollow section 3 with a substantially rectangular cross section as shown in Fig. 1. An airtight piece (end member) 2 is attached to the lower end of the inner screen 7. The airtight piece 2 is molded as a single piece from hard resin, and as shown in Figures 1, 2, and 4, has a columnar portion 16 that is inserted into the hollow portion 3 of the joint frame 1, a small-edge sealing portion 17 that abuts the small edge of the lower end of the joint frame 1 to seal the hollow portion 3, and a number of fin pieces 18 that prevent wind and rainwater from entering the room through the gap between the bottom frame 9 and the joint frame 1 of the outer screen 6. The airtight piece 2 is attached by fitting the columnar portion 16 into the hollow portion 3 of the joint frame 1 from below, and by making the columnar portion 16 swallow up into the lower end portion of the joint frame 1.

[0011] As shown in Figures 4 and 5(a), waterproof tape 21 is attached to the outer peripheral surfaces 19a, 19b, 19c, and 19d of the columnar portion 16 of the airtight piece 2 to form a water-absorbing layer 4 that absorbs water and swells between the inner peripheral surface 20 of the hollow portion 3 of the joint frame 1 (the hatched areas in the figure are the areas where the waterproof tape 21 is attached). Between the surface of the waterproof tape 21 and the inner peripheral surface 20 of the hollow portion 3 of the joint frame 1, there is a gap 22 of about 0.2 mm. The waterproof tape 21 is a very thin sheet with a thickness of about 0.3 mm, and has a water-absorbing layer 4 formed by coating the surface of a substrate made of olefin or the like with an absorbent polymer (SAP), and an adhesive on the back side of the substrate. When the waterproof tape 21 gets wet, the water-absorbing layer 4 absorbs water and swells into a gel, expanding in volume. As a result, the gaps 22 between the inner peripheral surface 20 of the hollow portion 3 of the joint frame 1 and the outer peripheral surfaces 19a, 19b, 19c, and 19d of the columnar portion 16 of the airtight piece 2 are blocked by the swollen water-absorbing layer 4, as shown in Fig. 5(b). The swollen water-absorbing layer 4 dries up and returns to its normal state when the rain stops and time passes.

[0012] Generally, in sliding sashes, as shown in Figure 7, in bad weather rainwater flows along the rail 11 of the bottom frame 9 toward the joint frame 1 (arrows 23 in the figure indicate the flow of water), and there is a risk that the rainwater will leak into the room by going around through the gap between the inner surface of the hollow portion 3 of the joint frame 1 and the outer surface of the columnar portion 16 of the airtight piece 2. As described above, in the sliding sash of this embodiment, the waterproof tape 21 is affixed to the outer surfaces 19a, 19b, 19c, and 19d of the columnar portions 16 of the airtight piece 2, so that the water absorbent layer 4 of the waterproof tape 21 swells to seal the gaps 22 between the inner surface 20 of the hollow portion 3 of the joint frame 1 and the outer surfaces 19a, 19b, 19c, and 19d of the columnar portions 16 of the airtight piece 2 (see Figure 5(b)).As a result, as shown in Figure 6, the flow of water 23 is blocked by the swollen water absorbent layer 4, preventing rainwater from entering the room.

[0013] In the above embodiment, the waterproof tape 21 is applied to the outer peripheral surfaces 19a, 19b, 19c, and 19d of the columnar portion 16 of the airtight piece 2, but the waterproof tape 21 may be applied only to the inner peripheral side surface 19a and the room side surface 19b of the columnar portion 16. The waterproof tape 21 may also be applied to the inner peripheral surface 20 of the hollow portion 3 of the joint frame 1.

[0014] As described above, this building device comprises a hollow member (joint frame) 1 having a hollow portion 3, and an end member (airtight piece) 2. The end member 2 is attached to the longitudinal end of the hollow member 1. One of the hollow member 1 and the end member 2 is enveloped in the other. At least one surface between the inner periphery of the one that envelopes it (hollow member 1) and the outer periphery of the one that it envelopes (end member 2) has a water-absorbing layer 4 that absorbs water and swells (see Figure 5). When the water-absorbing layer 4 gets wet, it swells and blocks the gap 22 between the inner periphery of the one that envelopes it (hollow member 1) and the outer periphery of the one that it envelopes (end member 2) (see Figure 5(b)). This makes it possible to prevent water from entering through the gap 22, thereby improving watertightness. In this building device, the hollow member is the vertical frame (joint frame) 1 of the shoji screen (inner shoji screen) 7, so that it is possible to prevent water from entering the room by going around the longitudinal end of the vertical frame 1 and passing through the gap 22 between the vertical frame 1 and the end member 2, thereby improving the watertightness of the building materials.

[0015] The present invention is not limited to the above-described embodiment. The cross-sectional shape and material of the hollow member and the shape and material of the end member can be changed as appropriate. The water absorption layer may be any material that absorbs water and swells, and the specific material is not important. The present invention can be widely applied to building devices using hollow members in general, in addition to fittings such as sliding sashes. For example, when attaching a resin end cap to the longitudinal end of a vertical or horizontal lattice made of a hollow shaped material, a waterproof tape having a water-absorbing layer is attached to the fitting portion, thereby preventing rainwater from penetrating into the vertical or horizontal lattice. Also, when attaching a resin end cap to the end of a column or beam made of a hollow shaped material of a simple building such as a carport, a waterproof tape having a water-absorbing layer is attached to the fitting portion, thereby preventing rainwater from penetrating into the column or beam. [Explanation of symbols]

[0016] 1 Joint frame (hollow member) 2 Airtight piece (end member) 3 Hollow part 4 Water absorption layer

Claims

[Claim 1] This construction device comprises a hollow member having a hollow portion and an end member, the end member being attached to the longitudinal end of the hollow member, one of the hollow member and the end member being encased in the other, and a water-absorbing layer that absorbs water and swells is provided on at least one surface between the inner peripheral side of the one encased and the outer peripheral side of the one being encased.

Images