JP2022063958A - Joint side face formation member, joint structure, and extension method - Google Patents

Abstract

To provide a joint side face formation member that can sufficiently hold a joint material and keep a joint watertight even when the joint has one exterior material formed thin, a joint structure, and an extension method utilizing the joint structure.SOLUTION: A joint side face formation member forms a side face of a vertical joint 3 formed between a first outer wall panel 6 which has a first exterior surface material 10 forming an outer wall of a building and a first frame body 11 provided on the reverse side of the first exterior surface material 10, and a second outer wall panel 7 which has a second exterior surface material 12 thicker than the first exterior surface material 10, and a second frame body 13 provided on the reverse side of the second exterior surface material 12, and arranged adjacently to the first outer wall panel 6, and a side face part 21 supported by a fixed base part 20 fixed to the first frame body 11 extends up to a position where its indoor side end edge is equal to an indoor side end edge of a face facing the vertical joint 3 of the second exterior surface material 12.SELECTED DRAWING: Figure 3

Description

In the present invention, a joint side surface forming member that forms a side surface of a joint in which exterior materials having different thicknesses are arranged adjacent to each other, a joint structure using the joint side surface forming member, and an existing building and an extension using the joint structure. Regarding the extension method to keep the waterproofness between the parts.

Conventionally, joints have been formed between exterior materials adjacent to each other to absorb the displacement of the outer wall. Such joints are filled with wet or dry joint materials, and the watertightness of the joints is mainly maintained. In order to maintain the watertightness of the joint by the joint material, the length of the side surface of the joint to which the joint material adheres is required in the indoor and outdoor directions.

The outer wall is usually formed of an exterior material having the same thickness, but for example, Patent Document 1 proposes using exterior materials having different thicknesses to change the texture in the exterior of a building. Further, in Patent Document 2, when the exterior material becomes thin and the joint material is not sufficiently held, a notch groove is provided in the wooden base material of the outer wall, and the dry joint material is fitted into the notch groove. The invention which holds the joint material and keeps the watertightness of the joint is described.

Japanese Unexamined Patent Publication No. 2000-257239 Japanese Unexamined Patent Publication No. 2001-336228

However, in the case of a joint structure as in Patent Document 1, one is thick and the other is a relatively thin exterior material, and the joint is formed. As it is required, sufficient watertightness cannot be maintained when the joint is formed with a thinner exterior material. Further, the joint structure as in Patent Document 2 cannot be used on the outer wall in which the wooden base material is not arranged in the back of the joint.

Therefore, the present invention utilizes a joint side surface forming member, a joint structure, and a joint structure capable of sufficiently holding the joint material and maintaining the watertightness of the joint even in the joint where one of the exterior materials is thinly formed. The purpose is to provide an extension method.

The first joint side surface forming member of the present invention includes a first outer wall panel having a first exterior surface material forming an outer wall of a building and a first frame body provided on the back surface of the first exterior surface material. A second exterior surface material thicker than the first exterior surface material and a second frame body provided on the back surface of the second exterior surface material, which are arranged adjacent to the first outer wall panel. (Ii) A joint side surface forming member that forms a side surface of the vertical joint formed between the outer wall panel and the first outer wall panel side, and is attached to a fixed base portion fixed to the first frame body and the fixed base portion. A side surface portion that is supported and extends in the indoor direction from the indoor side edge of the surface of the first exterior face material facing the vertical joint is provided, and the side surface portion has the indoor side edge thereof. It is characterized in that it extends to a position equal to the indoor / outdoor direction of the indoor side edge of the surface of the exterior surface material facing the vertical joint.

The second joint side surface forming member of the present invention further includes a connecting portion connecting the fixed base portion and the side surface portion, and the first frame body is formed in a groove shape that opens toward the vertical joint portion. The fixed base portion is flat and fixed to the bottom surface of the first frame body, and the connecting portion is formed by bending from the fixed base portion and has an angle with respect to the first exterior surface material. Attached, the first exterior surface material is formed so as to extend toward the indoor end edge of the surface facing the vertical joint, and the side surface portion is bent from the tip of the connecting portion and extends in the indoor direction. It is characterized by being formed.

The first joint structure of the present invention is more than a first outer wall panel having a first exterior surface material, a first frame provided on the back surface of the first exterior surface material, and the first exterior surface material. A second outer wall panel having a thick second exterior surface material and a second frame provided on the back surface of the second exterior surface material, and arranged adjacent to the first outer wall panel, and a first. It is characterized by comprising a joint side surface forming member or a second joint side surface forming member, a surface of the second exterior surface material facing the vertical joint, and a joint material filled between the side surface portions. ..

The extension method of the present invention is an extension method in which a first joint structure is provided and an outer wall is newly constructed, and a step of forming a skeleton of an extension portion adjacent to the skeleton of an existing building and the first of the existing buildings. A step of newly arranging the second outer wall panel adjacent to the outer wall panel and fixing it to the frame of the extension portion, and a first joint side surface on the side of the first outer wall panel adjacent to the second outer wall panel. Includes a step of fixing the forming member or the second joint side surface forming member, and a step of filling the joint material between the surface of the second exterior surface material facing the vertical joint and the side surface portion. It is characterized by.

According to the first joint side surface forming member of the present invention, the joint side surface forming member is a member forming the side surface of the vertical joint formed between the first outer wall panel and the second outer wall panel on the first outer wall panel side. be. The first exterior surface material of the first outer wall panel and the second exterior surface material of the second outer wall panel have different thicknesses, and the first exterior surface material is formed thinner than the second exterior surface material. .. As a result, when the joint material is filled, the contact area between the joint material and the first exterior surface material is smaller than the contact area between the joint material and the second exterior surface material. Therefore, since the indoor side edge of the side surface portion of the joint side surface forming member extends to a position equal to the indoor side edge of the surface facing the vertical joint of the second exterior face material in the indoor / outdoor direction, the joint side surface forming member By filling the joint material between the side surface of the second exterior surface material and the surface facing the vertical joint of the second exterior surface material, it is possible to compensate for the thinness of the first exterior surface material and keep the vertical joint sufficiently watertight. can.

According to the second joint side surface forming member of the present invention, the joint side surface forming member includes a flat plate-shaped fixing base, a connecting portion formed by bending from the fixing base, and a side surface portion formed by bending from the tip of the connecting portion. And, it is formed by bending a single flat plate. The connecting portion of the joint side surface forming member is formed by bending from the fixed base portion, and is formed at an angle with respect to the first exterior surface material on the indoor side of the surface of the first exterior surface material facing the vertical joint. It is formed so as to extend toward the edge. Since the connecting portion is provided at an angle to the first exterior surface material, it is connected to the head of a screw or rivet used for joining one side plate of the first frame body to the back surface of the first exterior surface material. It does not interfere with the part.

According to the joint structure of the present invention, any of the above-mentioned joint side surface forming members is used to form the side surface of the vertical joint on the first outer wall panel side so as to extend in the indoor direction. Since the joint material is filled between the surface facing the vertical joint and the side surface of the joint side surface forming member, even if the first exterior surface material is thin and the side surfaces of the joint material cannot be sufficiently adhered. By compensating for the thinness of the first exterior surface material, the vertical joints can be sufficiently watertightly maintained.

According to the extension method of the present invention, the second outer wall panel is newly placed adjacent to the first outer wall panel of the existing building and fixed to the frame of the extension portion, and is adjacent to the second outer wall panel of the first outer wall panel. Since the joint side surface forming member is fixed to the side and the joint material is filled between the side surface of the second exterior surface material facing the vertical joint and the side surface portion, even if the existing first outer wall panel is thin, The waterproof performance of the vertical joints that form the boundary with the extension can be made sufficient.

The figure which shows the appearance shape of the building which was expanded. A horizontal cross-sectional view illustrating a vertical joint before arranging a joint side surface forming member. A horizontal cross-sectional view illustrating a vertical joint to which a joint side surface forming member is attached. The figure which shows the dimension of each part of a vertical joint. The perspective view which shows the shape of the joint side surface forming member. A horizontal cross-sectional view illustrating a vertical joint in a state where a dry joint material is press-fitted. A horizontal cross-sectional view illustrating a vertical joint in a state of being filled with a wet joint material.

Hereinafter, embodiments of the joint side surface forming member 1, the joint structure 2, and the extension method according to the present invention will be described with reference to the respective drawings. As shown in FIG. 1, the joint structure 2 of the present embodiment has the joint structure 2 of the outer wall joint formed at the boundary between the existing building 4 and the extension portion 5 when the extension portion 5 is added to the existing building 4. And the joint side surface forming member 1 used for the joint structure 2. As shown in FIG. 2, the existing building 4 is, for example, a lightweight steel structure in which a rectangular frame-shaped framework 9 is spelled to form a structural skeleton 8, and the first outer wall panel 6 is fixed to the structural skeleton 8. It forms an outer wall surface. Further, the extension portion 5 forms an outer wall surface by fixing the second outer wall panel 7 to the newly installed structural skeleton 8 formed by joining to the structural skeleton 8 of the existing building 4.

As shown in FIGS. 6 and 7, the joint structure 2 includes a first outer wall panel 6 having a first exterior surface material 10 and a first frame 11 provided on the back surface of the first exterior surface material 10. It has a second exterior surface material 12 that is thicker than the first exterior surface material 10 and a second frame 13 provided on the back surface of the second exterior surface material 12, and is arranged adjacent to the first outer wall panel 6. The joint side surface forming member 1 that supplements the side surfaces of the second outer wall panel 7 and the vertical joint 3 on the first exterior surface material 10 side to form the side surface of the first outer wall panel 6, and the vertical joint surface material 12. It is a structure including joint members 14a and 14b filled between a surface facing the joint 3 and a side surface formed by the joint side surface forming member 1.

As shown in FIGS. 2 and 3, the first outer wall panel 6 is an old specification outer wall panel used for the existing building 4. The first outer wall panel 6 includes a first exterior surface material 10 that forms an outer wall surface of a building, a rectangular first frame 11 provided on the back surface of the first exterior surface material 10, and an indoor side of the first outer wall panel 6. It has a back plate 15 forming the surface of the surface, and a polystyrene heat insulating material 16 is housed inside. The first exterior surface material 10 is, for example, a thin plate material having a surface having a designable pattern and coating, for example, having a thickness of about 4 mm. The first frame body 11 and the heat insulating material 16 are formed so that the thickness of the first outer wall panel 6 in the out-of-plane direction is about 30 mm, and the back plate 15 is formed so as to have a thickness of about 4 mm. The first frame 11 is formed in a groove shape along the peripheral edge of the first outer wall panel 6, and is formed by opening outward in the in-plane direction of the first outer wall panel 6. The first frame body 11 has a bottom plate 11a that abuts on the heat insulating material 24, an outdoor side plate 11b that abuts and fixes the first exterior surface material 10, and an indoor side plate 11c that abuts and fixes the back surface plate 15. are doing. The first frame body 11 is fixed by driving rivets into the first exterior surface material 10 from the outdoor side plate 11b of the first exterior surface material 10, and the rivet head 16 is exposed inside the first frame body 11. ..

Further, as shown in FIGS. 2 to 4, the second outer wall panel 7 is an outer wall panel having the current specifications used for a newly expanded building. The second outer wall panel 7 has a second exterior surface material 12 that is thicker than the first exterior surface material 10, and a rectangular second frame body 13 provided on the back surface of the second exterior surface material 12. The second exterior surface material 12 is formed by, for example, having an uneven pattern and a coating on the surface thereof, and is a surface material having a thickness of at least 10 mm or more. The second exterior surface material 12 needs to have a thickness α of the side surface forming the joint of at least 10 mm or more, and for example, a chamfered portion 17 having a thickness direction of about 2 mm is formed on the outer peripheral edge on the outdoor side. If so, the thickness of the second exterior surface material 12 is at least 12 mm or more. The second frame body 13 is formed so that the thickness of the second outer wall panel 7 in the out-of-plane direction is, for example, the same as the thickness of the second exterior surface material 12. The thickness of the entire second outer wall panel 7 including the second exterior surface material 12 and the second frame body 13 may be equal to the thickness of the first outer wall panel 6 including the first exterior surface material 10 and the first frame body 11. preferable. The second frame 13 is formed in a groove shape along the peripheral edge of the second outer wall panel 7, and is formed by opening outward in the in-plane direction of the second outer wall panel 7.

As shown in FIG. 2, the first outer wall panel 6 and the second outer wall panel 7 are attached to the framework 9 constituting the structural frame 8 of the building. The framework 9 is made of C-shaped steel that opens inward and is formed in a rectangular frame shape. In the framework 9, adjacent frameworks 9 are connected to each other by horizontal spelling bolts 18, and the first frame of the first outer wall panel 6 is provided by the outer wall mounting hardware 19 inserted between the adjacent frameworks 9. The second frame body 13 of the body 11 and the second outer wall panel 7 is locked and fixed.

As shown in FIG. 4, a gap δ of, for example, 11 mm is formed between the first outer wall panel 6 and the second outer wall panel 7 adjacent to each other, and this gap δ is the vertical joint 3. As shown in FIG. 2, since the first exterior surface material 10 is thinner than the second exterior surface material 12, the surface β facing the vertical joint 3 of the first exterior surface material 10 is the vertical joint 3 of the second exterior surface material 12. It is formed shorter in the depth direction of the joint than the surface α facing the joint. Therefore, when the vertical joints 3 are filled with the joint materials 14a and 14b, the side surfaces of the vertical joints 3 formed by the first exterior surface material 10 are short, and the joint materials 14a and 14b come into contact with the first exterior surface material 10. The area becomes short, and the joint materials 14a and 14b cannot be properly filled.

As shown in FIGS. 3 and 5, the joint side surface forming member 1 supplements the side surface of the vertical joint 3 on the first exterior surface material 10 side to form the side surface of the first outer wall panel 6. The joint side surface forming member 1 is indoors from the indoor end edge of the surface facing the vertical joint 3 of the first exterior surface material 10 supported by the fixed base portion 20 fixed to the first frame body 11 and the fixed base portion 20. A side surface portion 21 extending in the direction and a connecting portion 22 connecting the fixed base portion 20 and the side surface portion 21 are provided. The fixing base 20 has a flat plate shape, is in contact with the bottom plate 11a of the first frame body 11, and is fixed by the fixing screw 23.

As shown in FIGS. 3 and 4, the side surface portion 21 is arranged so that the end portion on the outdoor side is close to the end edge on the indoor side of the surface facing the vertical joint 3 of the first exterior surface material 10 and is located on the indoor side. An end portion is formed on the indoor side edge of the surface of the second exterior surface material 12 facing the vertical joint 3 so as to extend to a position equal to the indoor / outdoor direction. The length γ of the side surface portion 21 in the indoor / outdoor direction is 11.5 mm in the present embodiment. The length γ of the side surface portion 21 in the indoor / outdoor direction needs to be at least 10 mm or more. The length of the side surface portion 21 in the vertical direction is equal to the length of the first exterior surface material 10 and the second exterior surface material 12 in the vertical direction.

Further, the connecting portion 22 is formed by being bent from the fixed base portion 20, and is angled with respect to the first exterior surface material 10 to face the vertical joint 3 of the first exterior surface material 10 on the indoor side. It is formed to extend toward the edge. The side surface portion 21 is formed by bending from the tip of the connecting portion 22 and extending in the indoor direction. As described above, the joint side surface forming member 1 is formed of a fixed base portion 20, a connecting portion 22 formed by bending from the fixed base portion 20, and a side surface portion 21 formed by bending from the tip of the connecting portion 22. Therefore, it can be formed by bending a single metal plate. Since the connecting portion 22 of the joint side surface forming member 1 is provided at an angle with respect to the first exterior surface material 10, one side plate of the first frame 11 and the back surface of the first exterior surface material 10 are provided. It is possible to prevent the rivet head 16 used for joining with the connecting portion 22 from interfering with the connecting portion 22.

As the joint materials 14a and 14b to be filled in the vertical joint 3, for example, a dry joint material 14a is used as shown in FIG. The dry joint material 14a is a resin gasket having elasticity that is press-fitted into the vertical joint 3 to stop water in the vertical joint 3. The dry joint material 14a is formed to have a length in the joint width direction longer than the width of the vertical joint 3 before being inserted into the vertical joint 3, and is elastically deformed by being press-fitted into the vertical joint 3. Then, they are in close contact with the side surfaces of both sides of the vertical joint 3. In the present embodiment, in order to ensure the watertightness of the vertical joint 3, both side surfaces of the vertical joint 3 are flat surfaces having a length of 10 mm or more in the depth direction, and are formed on both side surfaces of the vertical joint 3. Both sides of the dry joint material 14a need to come into contact with each other.

A joint clip material 23 is inserted into the back of the vertical joint 3. The joint clip material 23 is a positioning material that performs positioning when the joint material 14a is press-fitted and prevents the joint material 14a from falling off to the indoor side of the first exterior surface material 10. A receiving groove is formed in the center of the joint clip material 23, and the convex portion formed at the tip of the dry joint material 14a on the indoor side is fitted into the receiving groove, so that the joint material 14a is in an appropriate position. Is held in. Then, one side surface of the joint material 14a abuts on the side surface portion 21 of the joint side surface forming member 1, and the other side surface of the joint material 14a abuts on the side surface of the second exterior surface material 12 facing the vertical joint 3. Then, it is press-fitted into the vertical joint 3. At this time, the side surface portion 21 of the joint side surface forming member 1 has a length of 10 mm or more in the depth direction of the joint, and the length of the side surface of the second exterior surface material 12 facing the vertical joint 3 in the depth direction is also 10 mm or more. Therefore, both side surfaces of the joint material 14a can each come into contact with a flat surface having a length of 10 mm or more in the depth direction, and the watertightness of the vertical joint 3 can be ensured.

The joint materials 14a and 14b to be filled in the vertical joint 3 are not limited to the dry joint material 14a, and as shown in FIG. 7, a wet joint material 14b may be used. In the wet joint material 14b, the vertical joint 3 is filled with a highly viscous liquid resin and cured in the vertical joint 3 to stop water in the vertical joint 3. In order for the wet joint material 14b to ensure the watertightness of the vertical joint 3, both side surfaces of the vertical joint 3 are flat surfaces having a length of 10 mm or more in the depth direction, and both side surfaces of the vertical joint 3 It is necessary to adhere the wet joint material 14b to each of them.

A joint backup material 26 is inserted in the back of the vertical joint 3. The joint backup material 26 prevents the joint material 14b from falling off to the indoor side of the first outer wall panel 6 and the second outer wall panel 7 when the wet joint material 14b is filled, and the joint material 14b is uniformly and sufficiently provided. It is a backup material for filling a large amount. Then, the wet joint material 14b is filled in the groove formed by the joint backup material 26, the side surface portion 21 of the joint side surface forming member 1, and the side surface of the second outer wall surface material facing the vertical joint 3. Then, the vertical joint 3 is stopped. At this time, the side surface portion 21 of the joint side surface forming member 1 has a length of 10 mm or more in the depth direction of the joint, and the length of the side surface of the second exterior surface material 12 facing the vertical joint 3 in the depth direction is also 10 mm or more. Therefore, the wet joint material 14b can be filled with a thickness of 10 mm or more, and the watertightness of the vertical joint 3 can be ensured for a long period of time.

When expanding a building, first, the structural skeleton 8 of the extension portion 5 is formed adjacent to the structural skeleton 8 of the existing building 4. At this time, the first outer wall panel 6 of the existing building 4 is not removed from the structural skeleton 8 for the portion that becomes the outer wall even after the extension. Then, as shown in FIG. 2, the outer wall mounting hardware 19 is installed at a position adjacent to the framework 9 of the existing building 4 and the framework 9 of the extension portion 5, and is adjacent to the first outer wall panel 6 of the existing building 4. Then, the second outer wall panel 7 is newly arranged, the second frame 13 of the second outer wall panel 7 is locked to the outer wall mounting hardware 19, and the second outer wall panel 7 is attached to the structural frame 8 of the extension portion 5. Fix it. Then, as shown in FIG. 3, the fixing base 20 of the joint side surface forming member 1 is brought into contact with the bottom plate 11a of the first frame 11 on the side adjacent to the second outer wall panel 7 of the first outer wall panel 6 to be fixed. It is fixed with a screw 23 to form a vertical joint 3. After that, as shown in FIG. 6, in the case of the dry joint material 14a, the joint clip material 23 is passed between the surface of the second exterior surface material 12 facing the vertical joint 3 and the side surface portion 21 of the joint side surface forming member 1. Is inserted into the back of the joint, and the dry joint material 14a is press-fitted into the vertical joint 3 to complete the outer wall. In the case of the wet joint material 14b, as shown in FIG. 7, the joint backup material 26 is jointed through between the surface of the second exterior surface material 12 facing the vertical joint 3 and the side surface portion 21 of the joint side surface forming member 1. It is inserted into the back, and the vertical joint 3 is filled with the wet joint material 14b and cured to complete the outer wall.

In this way, since the joint materials 14a and 14b are filled between the surface of the second exterior surface material 12 facing the vertical joint 3 and the side surface portion 21, the existing first outer wall panel 6 is thin, and the joint material 14a, Even when the waterproof performance of 14b cannot be sufficiently exhibited, the side surface portion 21 of the joint side surface forming member 1 forms the side surface of the vertical joint 3, so that the boundary between the existing building 4 and the extension portion 5 is formed. The waterproof performance of the vertical joint 3 can be made sufficient.

It goes without saying that the embodiment of the present invention is not limited to the above-described embodiment and can be appropriately changed without departing from the scope of the idea of the present invention.

The joint side surface forming member 1, the joint structure 2, and the extension method according to the present invention are watertight of the vertical joint 3 when the thickness of the exterior surface material of the existing outer wall panel and the exterior surface material of the newly installed outer wall panel are different. It is suitable as a joint side surface forming member 1, a joint structure 2, and an extension method that can ensure the properties.

1 Joint side surface forming member 2 Joint structure 3 Vertical joint 4 Existing building 5 Extension part 6 First outer wall panel 7 Second outer wall panel 10 First exterior surface material 11 First frame body 12 Second exterior surface material 13 Second frame body 14a Joint material (dry type)
14b Joint material (wet)
20 Fixed base 21 Side surface 22 Connecting

Claims (4)

A first outer wall panel having a first exterior surface material forming an outer wall of a building and a first frame body provided on the back surface of the first exterior surface material, and a second exterior surface thicker than the first exterior surface material. A vertical joint formed between a material and a second outer wall panel having a second frame body provided on the back surface of the second exterior surface material and arranged adjacent to the first outer wall panel. A joint side surface forming member that forms a side surface on the first outer wall panel side.
A fixed base fixed to the first frame and
A side surface portion supported by the fixing base and extending in the indoor direction from the indoor end edge of the surface of the first exterior surface material facing the vertical joint.
Equipped with
The side surface portion is a joint side surface forming member whose indoor side edge extends to a position equal to the indoor side edge of the surface of the second exterior surface material facing the vertical joint in the indoor / outdoor direction. Further provided with a connecting portion for connecting the fixed base portion and the side surface portion,
The first frame is formed in a groove shape that opens toward the vertical joint, and one side plate is fixed to the back surface of the first exterior surface material.
The fixing base is flat and fixed to the bottom surface of the first frame.
The connecting portion is formed by bending from the fixing base portion, and is formed at an angle with respect to the first exterior surface material on the indoor end edge of the surface of the first exterior surface material facing the vertical joint. It is formed by extending toward
The joint side surface forming member according to claim 1, wherein the side surface portion is formed by bending from the tip end of the connecting portion and extending in the indoor direction. A first outer wall panel having a first exterior surface material and a first frame body provided on the back surface of the first exterior surface material.
A second exterior surface material thicker than the first exterior surface material and a second frame body provided on the back surface of the second exterior surface material, which are arranged adjacent to the first outer wall panel. Two outer wall panels and
The joint side surface forming member according to claim 1 or 2,
The joint material to be filled between the surface of the second exterior surface material facing the vertical joint and the side surface portion,
A joint structure characterized by being equipped with. This is an extension method in which the joint structure according to claim 3 is provided and an outer wall is newly installed.
The process of forming the skeleton of the extension part adjacent to the skeleton of the existing building,
A step of newly arranging the second outer wall panel adjacent to the first outer wall panel of the existing building and fixing it to the skeleton of the extension portion.
The step of fixing the joint side surface forming member according to claim 1 or 2 on the side of the first outer wall panel adjacent to the second outer wall panel.
A step of filling the joint material between the surface of the second exterior surface material facing the vertical joint and the side surface portion.
Extension method characterized by including.

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