Exterior wall joint construction method

Abstract

To provide a construction method of an exterior wall joint that has high cut-off performance, and can use material repeatedly since a joint filler separation is easy in building dismantlement.SOLUTION: A joint filler 1 is continuously provided with a cover part 2 that has a width larger than the gap of adjacent wall panels 54 and extends in a vertical direction and an insertion part 3 that can be inserted into the gap of adjacent wall panels 54. The insertion part 3 has a bifurcated flexible insertion piece 4 with elastic buffer materials 5 attached onto outside surfaces thereof and a bag 6 that is sandwiched inside the insertion piece 4. A construction method of an exterior wall joint includes making the insertion part 3 shrinkingly close with the bag 6 empty, inserting the insertion part 3 into the gap of the adjacent wall panels 54 and laying reverse faces of both sides of the cover part 2 along surfaces of the adjacent wall panels 54 respectively, pouring a filler 7 such as sand with fluidity from a top edge to the bag 6, and closely sticking the buffer materials 5 to side end faces of the wall panels 54 by expanding the insertion piece 4 due to a lateral pressure associated with expansion of the bag 6.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a joint construction method for sealing the gaps between the outer walls of buildings.

Background Art

[0002] As a method for constructing exterior joints, as described in Patent Document 1 below, a pre-formed joint material is press-fitted into the gaps between adjacent wall panels, or as described in Patent Document 2 below, a base plate is attached to the building's framework, and the joint material is connected to the base plate through the gaps between adjacent wall panels using a drill bit or the like.

[0003] On the other hand, as described in Patent Document 3 below, the applicant has proposed a unit building in which a container-type unit 51 is fabricated by joining columns 52 and beams 53 in a box frame shape and attaching wall panels 54 to each surface, and a plurality of units 51 are stacked adjacent to each other and connected to construct a building.

[0004] In this unit building, from the top floor to the bottom floor units 51, a connecting shaft 55 made of a PC steel bar or PC steel wire with a long axis is inserted into a square steel pipe column 52, and after locking the tip of the connecting shaft 55 below the building, the nuts 56 screwed onto the connecting shaft 55 are tightened at the top of the building to connect the upper and lower units 51.

[0005] Such a unit building can stack the units 51 arranged adjacent to each other on each floor, can be stably built to a high level, can be constructed in a short construction period, and the relocation work can also be easily performed. Therefore, it is suitable for the construction of temporary buildings in reconstruction bases from large-scale disasters and long-term development projects. Although gaps occur between adjacent units 51 on each floor, Patent Document 3 below does not present a method for sealing these gaps.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Utility Model Publication No. 5-42407 [Patent Document 2] Japanese Patent Application Publication No. 6-2757235 [Patent Document 3] Patent No. 5707418 [Overview of the project] [Problems that the invention aims to solve]

[0007] In a modular building as described in Patent Document 3 above, when sealing gaps between adjacent units, simply pressing pre-formed joint material into the gap, as described in Patent Document 1, may result in the joint material deteriorating over time, potentially impairing its watertightness.

[0008] Furthermore, according to the construction method described in Patent Document 2, the joint material is fixed to the base plate on the building's framework side with self-drilling screws or the like, which presents a problem in that it becomes difficult to separate the joint material from the building when the building is dismantled and the units and joint material are to be reused.

[0009] Therefore, the objective of this invention is to provide a method for constructing exterior wall joints that offers high watertightness, facilitates the separation of joint materials during building demolition, and allows for repeated use of materials. [Means for solving the problem]

[0010] To solve the above problems, the method for constructing exterior wall joints according to this invention uses a joint material which has a cover portion that is wider than the gap between adjacent wall panels and extends vertically, and an insertion portion that can be inserted into the gap, connected together. The insertion portion of the joint material has an elastic cushioning material attached to the outer surface of a flexible, bifurcated insertion piece, and a bag is sandwiched inside the insertion piece. The insertion portion of the joint material is closed by emptying the bag, the insertion portion is inserted into the gap between the adjacent wall panels, the back surfaces on both sides of the cover portion are aligned with the surfaces of the adjacent wall panels, a fluid filler is poured into the bag from the top, and the lateral pressure caused by the expansion of the bag expands the insertion piece, causing the cushioning material to adhere tightly to the side end surface of the wall panel.

[0011] Furthermore, the joint material has an outlet with a lid at the bottom of the cover portion, and the outlet communicates with the hole in the bag. When the lid is removed from the cover portion and the outlet is opened, the filler material flows out of the bag, the bag deflates, the insertion piece shrinks and closes, and the joint material can be separated from the wall panel. [Effects of the Invention]

[0012] According to the exterior wall joint construction method of this invention, a fluid filler is poured into the bag of the insertion part of the joint material from the top, and the cushioning material on the outside of the insertion piece, which expands due to the lateral pressure caused by the expansion of the bag, is pressed tightly against the side edge surface of the wall panel, thereby preventing rainwater from entering through the joint. This provides high watertightness and suppresses damage to the wall panels and framework of the building.

[0013] Furthermore, during building demolition, the joint material can be easily removed from the wall panels by simply removing the cover and draining the filler material from the bag.

[0014] Furthermore, even if the joint material is separated from the wall panel, the wall panel and framing materials will not be damaged, and the joint material will not be damaged either. Therefore, when applied to modular construction, the units and joint materials can be reused repeatedly, and temporary buildings can be quickly moved to the required location. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing an example of exterior wall joint construction using the construction method according to this invention. [Figure 2] Cross-sectional plan view of the same construction example. [Figure 3] (a)-(c) Schematic plan view showing the same construction procedure [Figure 4] Schematic plan view showing the removal work of the same joint material [Figure 5] Schematic plan view of the joint material with the cover part and the insertion part separated as described above [Figure 6] Perspective view showing the unit building described in Patent Document 3

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

[0017] This embodiment relates to a method for treating joints for sealing the gaps between the wall panels 54 of adjacent units 51 when constructing a unit building as shown in FIG. 6.

[0018] As shown in FIG. 1, the corner columns 52 of adjacent units 51 are connected to column feet 50b rising from the base plate 50a of the foundation base 50, and a connecting shaft 55 connecting the upper and lower units 51 is inserted through the holes of the end plates 52a in the columns 52. The connecting part of the column 52 is surrounded by a joint frame material 52b.

[0019] As shown in FIG. 2, the wall panel 54 is formed by laminating a wood wool board 54b on the back surface of the wall finishing material 54a, and is fixed to a body edge 57 passed through the middle part of the column 52. When the wall panel 54 is a CLT board (cross-laminated timber), the body edge 57 is unnecessary.

[0020] As shown in FIGS. 1 and 2, the joint material 1 used in this outer wall joint construction method is provided with a plate-shaped cover part 2 that is wider than the gap between adjacent wall panels 54 and extends in the vertical direction, and an insertion part 3 that can be inserted into the gap between adjacent wall panels 54, which are connected in series.

[0021] The insertion part 3 has an elastic buffer material 5 attached to the outer surface of a bifurcated insertion piece 4 having flexibility, and a bag 6 is sandwiched inside the insertion piece 4.

[0022] In the example shown in Figure 2, the cover portion 2 and the insert piece 4 are made as a single integrated component. This component should preferably be made from an aluminum plate, iron plate, plastic, or a composite material of metal and plastic, and should have excellent fire resistance.

[0023] The cushioning material 5 is intended to be in close contact with the side edge surface of the wall panel 54 to achieve watertightness, and is made of urethane foam or hard rubber.

[0024] Bag 6 is a long, narrow container into which the fluid filler material 7, such as sand, is poured. It can be made of a tightly woven wire mesh, non-woven fabric, polyethylene, or the like. Alternatively, one to several connected hoses may be used as bag 6.

[0025] The filler material 7 increases the internal pressure of the insertion part 3 to seal the gaps in the joint, and it must have a high specific gravity, be easy to refill into the bag 6, and not lose its fluidity over time. Examples of materials that satisfy these conditions include dry sand, small-grained gravel, iron powder, and liquids with a high specific gravity.

[0026] Furthermore, as shown in Figures 1 and 4, an outlet 8 for removing the filler material 7 is formed at the bottom of the cover portion 2, communicating with a hole formed at the bottom of the bag 6, and a lid 9 that can be attached to and removed from the outlet 8 is provided. The outlet 8 is closed with the lid 9 during installation.

[0027] To seal the gap between adjacent wall panels 54 of unit 51 using the joint material 1 described above, as shown in Figure 3(a), the insertion part 3 of the joint material 1 is retracted with the bag 6 empty, and in that state, as shown in Figure 3(b), the insertion part 3 is inserted into the gap between adjacent wall panels 54, and the back surfaces on both sides of the cover part 2 are aligned with the surfaces of the adjacent wall panels 54.

[0028] Subsequently, as shown in Figure 3(c), a fluid filler material 7 such as sand is poured into the bag 6 from the top, and the bifurcated insertion piece 4 is expanded by the lateral pressure caused by the expansion of the bag 6, causing the cushioning material 5 to adhere tightly to the side end surface of the wall panel 54.

[0029] In this way, by pressing the cushioning material 5 on the outside of the expanded insertion piece 4 of the insertion part 3 tightly against the side end surface of the wall panel 54, the intrusion of rainwater from the joint is prevented, resulting in high watertightness and suppressing damage to the building's wall panels and framework. In addition, the joint material 1 is firmly fixed to the wall panel 54 and will not come off the wall panel 54 over time.

[0030] Furthermore, since joint material 1 is made of inexpensive materials, the cost of procuring materials is reduced, and the jointing is easy to perform, thus lowering the cost required for the work.

[0031] On the other hand, when demolishing a building, as shown in Figure 4, by removing the lid 9 from the cover portion 2 of the joint material 1 and opening the outlet 8, the filler material 7 flows out of the bag 6, the bag 6 shrinks and the insertion piece 4 contracts, so the joint material 1 can be separated from the wall panel 54 and easily removed.

[0032] Furthermore, even if the joint material 1 is separated from the wall panel 54, the wall panel 54 and the framework material will not be damaged, and the joint material 1 will not be damaged either. Therefore, when applied to modular construction, the unit 51 and the joint material 1 can be reused repeatedly, and the modular construction as a temporary building can be quickly moved to the location where it is needed.

[0033] In the above embodiment, the joint material 1 was exemplified as a unit in which the cover portion 2 and the insertion piece 4 of the insertion portion 3 are integrated. However, as shown in Figure 5, the joint material 1 may also be configured such that the cover portion 2 and the insertion piece 4 of the insertion portion 3 are separate, and the cover portion 2 is fastened to the hinge portion of the bifurcated insertion piece 4 with screws 10 or the like. [Explanation of symbols]

[0034] 1. Joint material 2. Cover section 3. Insertion part 4 Insertion piece 5 Cushioning material 6 bags 7 Filling material 8 Outlet 9 Lid 10 screws 50 Basic leg body 50a Base Plate 50b column base 51 units 52 pillars 52a end plate 52b Joint frame material 53 Beam 54 Wall Panels 54a Wall finishing material 54b wood wool version 55 Connecting shaft 56 nuts 57. Furring strips

Claims

1. As a jointing material (1), a cover portion (2) that is wider than the gap between adjacent wall panels (54) and extends vertically, and an insertion portion (3) that can be inserted into the gap are used in conjunction. The insertion portion (3) of the joint material (1) has an elastic cushioning material (5) attached to the outer surface of a flexible, bifurcated insertion piece (4), and a bag (6) is sandwiched inside the insertion piece (4). A method for constructing exterior wall joints, wherein the insertion portion (3) of the joint material (1) is shrunk and closed with the bag (6) empty, the insertion portion (3) is inserted into the gap between the adjacent wall panels (54), the back surfaces on both sides of the cover portion (2) are aligned with the surfaces of the adjacent wall panels (54), a fluid filler (7) is poured into the bag (6) from the top, the insertion piece (4) is expanded by the lateral pressure caused by the expansion of the bag (6), and the cushioning material (5) is brought into close contact with the side end surface of the wall panel (54).

2. The joint material (1) has an outlet (8) with a lid (9) at the bottom of the cover portion (2), and the outlet (8) is in communication with the hole in the bag (6). The method for constructing an exterior wall joint according to claim 1, characterized in that when the lid (9) is removed from the cover portion (2) and the outlet (8) is opened, the filler material (7) flows out from the bag (6), the bag (6) deflates and the insertion piece (4) shrinks, and the joint material (1) is separated from the wall panel (54).

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