JP2003328528A - Outer wall panel installing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outer wall panel installing structure easily constructible so that an inorganic outer wall face material does not warp, and causing no warp and crack in the inorganic outer wall face material by a change in heat and humidity. <P>SOLUTION: An outer wall panel 3 is composed of the inorganic outer wall face material 31 and an installing metal fitting 32. This structure installs this inorganic outer wall face material 31 on a building structure 2 via the installing metal fitting 32 in a state of being movable in the in-plane direction of an installing wall surface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall panel mounting structure in which an outer wall panel in which a mounting bracket is mounted on an inorganic outer wall material is mounted on a building structure.

[0002]

2. Description of the Related Art Conventionally, an outer wall panel in which a mounting bracket for attaching to a building structure is attached to an inorganic outer wall material such as a hard wood chip cement board, a concrete board, a lightweight cellular concrete board, an ALC board, and a foam glass board. Is well known,
Many are used. These outer wall panels are used by being attached to building structures such as building columns, beams, and studs. Various structures are known as a structure for attaching the outer wall panel to the building structure.

For example, in Japanese Patent Laid-Open No. 60-23540, an outer wall panel is one in which a nut as a fitting is embedded in an inorganic outer wall material, and the inorganic outer wall material is applied to a building structure. The mounting structure of the outer wall panel in which the bolts that have been brought into contact with each other and penetrated through the through holes provided in the building structure are screwed into the nuts embedded in the inorganic outer wall surface material to attach the nuts to the building structure is described. Has been done.

Further, in Japanese Unexamined Patent Publication No. 61-106848, an outer wall panel is provided with a metal square tubular elongated metal fitting on the back surface of a hard wood chip cement plate which is an inorganic outer wall material. , A mounting structure for an outer wall panel in which this mounting bracket is mounted on a building structure with rivets.

The mounting structure of the outer wall panel will be described in more detail. The rivet is composed of a flange portion, an expandable portion serving as an expansion deformable portion, and a web connecting the flange portion and the expandable portion. Pass the rivet web through the through hole of the building structure and the through hole of the mounting bracket,
An inorganic wall panel is fixed to a building structure by a rivet that presses a building structure and a mounting plate with an expanding and deforming part obtained by expanding an expandable part.

The construction method for this wall panel mounting structure is such that through holes are provided in the building structure and the mounting bracket in advance, and the mounting bracket is brought into contact with the building structure to form the through hole of the building structure. Insert the expandable part of the rivet and the web into the through hole of the mounting bracket from the indoor side (building structure side) until the flange contacts the building structure, and project the expandable part to the opposite side. The expandable part projecting to the side is crushed from the indoor side and expanded to form an expanded deformable part, and the expandable deformable part and the flange part pinch the building structure and the mounting bracket, and the outer wall panel becomes the building structure. Attach it.

[0007]

However, JP-A-60-
In the outer wall panel mounting structure described in Japanese Patent No. 23540, if the positions of the bolt and the nut deviate from each other, the bolt cannot be screwed into the nut, and as a result, the outer wall panel is mounted to the building structure. Can't do it.
Therefore, extremely precise accuracy is required and it is difficult to carry out construction.
Further, JP-A-60-23540 and JP-A-61-10.
The mounting structure for the outer wall panel described in Japanese Patent No. 6848 is
There are the following problems.

That is, the inorganic outer wall material used for the inorganic outer wall panel is excellent in weather resistance and fire resistance and has a large mechanical strength, so that it is extremely excellent, but the inorganic outer wall material is hard to be deformed and fragile. It has the disadvantage of having the property.
Then, while the inorganic outer wall panel is attached to the building structure and the inorganic outer wall material or the building structure expands or contracts due to temperature and humidity changes during a long period of time, at this time, the building structure Since there is a difference in expansion and contraction between the inorganic outer wall material and the inorganic outer wall material, stress is generated inside the inorganic outer wall material fixed to the building structure, and this stress causes warpage or cracks in the inorganic outer wall material. Can occur.

Further, the mounting metal fitting is a long body, and the plurality of screws or rivets are screwed into the inorganic outer wall surface material until the mounting metal fitting cuts into the inorganic outer wall material. There are times when the expandable part is crushed and it is firmly attached, but at that time, there is a difference in the length of the inorganic outer wall material between the adjacent screws and rivets and the length between the mounting brackets. The inorganic outer wall material may warp.

Therefore, an object of the present invention is to mount an outer wall panel that can be easily installed so that the inorganic outer wall material does not warp and that the inorganic outer wall material does not warp or crack due to changes in heat or humidity. Is to provide the structure.

[0011]

The present invention is made to achieve the above object, and the invention according to claim 1 is such that the outer wall panel comprises an inorganic outer wall material and a mounting metal fitting. Has a through hole through which the fastening member passes,
The portion of the fastening member that is inside the through hole of the mounting bracket has a diameter smaller than the through hole and a height approximately equal to or slightly smaller than the thickness of the mounting bracket to form a stepped portion. The wall surface material is attached to the building structure through a mounting metal fitting so that the inorganic outer wall surface material can move in the plane direction of the inorganic outer wall material.

According to a second aspect of the invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped screw has a head portion, a screw portion, and a step provided between the head portion and the screw portion. The stepped portion has a diameter smaller than the diameter of the head portion and larger than the diameter of the threaded portion, and the height thereof is substantially equal to or slightly larger than the thickness of the mounting metal fitting. A through hole with a diameter smaller than the diameter of the head of the stepped screw and larger than the diameter of the stepped portion is provided, and this mounting bracket is brought into contact with the back surface of the inorganic outer wall surface material, and the stepped screw passes through the through hole of the mounting bracket. The mounting metal fitting is attached to the inorganic outer wall material by screwing the stepped portion into the inorganic outer wall material until the step reaches the inorganic outer wall material, and the mounting metal fitting is attached to the building structure.

According to a third aspect of the present invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped screw has a head portion, a screw portion, and a step provided between the head portion and the screw portion. The stepped portion has a diameter smaller than the diameter of the head portion and larger than the diameter of the threaded portion, and the height thereof is substantially equal to or slightly larger than the thickness of the mounting metal fitting. A laterally extended part is provided, and a through hole whose diameter is smaller than the diameter of the head of the stepped screw and larger than the diameter of the step is provided in this extended part. The rear surface is attached with the extension portion protruding from the side edge portion of the inorganic outer wall material, the extension portion of this mounting bracket is abutted against the building structure, and the stepped screw is passed through the through hole of the extension portion to construct the building structure. The mounting bracket is screwed into the body until the step reaches the building structure. Those attached to the structure.

According to a fourth aspect of the invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped rivet comprises:
It consists of a flange part, an expandable part that is an expanded deformation part, and a step part provided between the flange part and the expandable part. The step part has a diameter smaller than that of the flange part and a diameter of the expandable part. It is larger and has a height substantially equal to or slightly larger than the thickness of the mounting bracket, and the mounting bracket is provided with an extension portion extending in the lateral direction, and the extension portion has a stepped rivet with a diameter. Through holes that are smaller than the diameter of the flange portion of the stepped rivet and that are larger than the diameter of the stepped portion of the stepped rivet are provided in the building structure. The metal fitting is attached to the back surface of the inorganic outer wall surface material, with the extension portion protruding from the side edge portion of the inorganic outer wall material, and the extension portion of the mounting metal fitting is brought into contact with the building structure to form the step of the stepped rivet. Part is inserted into the through hole of the extension part, With the stepped rivet sandwiching the building structure and the mounting bracket with the flange and the expandable deformation part that expands the expandable part, with the mounting bracket attached to the building structure. is there.

According to a fifth aspect of the invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped rivet comprises:
It consists of a flange part, an expandable part that is an expanded deformation part, and a step part provided between the flange part and the expandable part. The step part has a diameter smaller than that of the flange part and a diameter of the expandable part. A through hole whose diameter is smaller than that of the stepped rivet and is larger than that of the expandable portion. The building structure is provided with a through hole that is smaller than the diameter of the flange portion of the stepped rivet and larger than the diameter of the step portion, and a mounting metal fitting is attached to the back surface of the inorganic outer wall surface material. Abutting the building structure, the step of the stepped rivet is inserted into the through hole of the building structure,
A stepped rivet that sandwiches the building structure and the mounting bracket with the flange and the expandable deformation part that expands the expandable part, with the mounting bracket attached to the building structure. Is.

The building structure in the present invention refers to a building member having a high mechanical strength to which an inorganic wall panel is attached, and examples of such building structure include a ceiling beam, a floor beam, a pillar, a stud, and a lintel.

The inorganic outer wall surface material in the present invention is a plate-shaped material of cement-based, glass-based or rock-based inorganic material. Examples of the inorganic outer wall surface material include a hard wood chip cement board, Concrete plate, fiber reinforced concrete plate, lightweight cellular concrete plate, fiber reinforced lightweight cellular concrete plate, ALC plate, foam glass plate, cured plate of inorganic water-containing molding material or fiber-reinforced water-containing molding for inorganic molding There are plates of material. In particular, actual public Sho 59-2
No. 2817, a lightweight aerated concrete (ALC) cured at high temperature and high pressure and Japanese Patent Publication No. 4-45471.
A plate-shaped body obtained by curing the water-containing molding material for molding described in JP-A No. 1993-242242 is preferable.

The fitting in the present invention is attached to an inorganic outer wall material so that the inorganic outer wall material can be easily attached to a building structure. That is, since the inorganic outer wall material is fragile, it is difficult to directly attach it to the building structure, but by attaching this mounting bracket to the inorganic outer wall material to form the outer wall panel, the outer wall panel can be firmly attached to the building structure. Will be able to. A metal plate, a nail plate, a metal frame having a rectangular tube shape, or the like is suitable as the mounting bracket.

It is also preferable to provide a waterproof material such as a butyl caulking material at the boundary when mounting the metal fitting on the inorganic outer wall surface material because the waterproof property during this period is improved.
Further, it is preferable that a sheet having both cushioning property and waterproof property such as a polyethylene foam sheet is sandwiched between the boundaries when mounting the mounting bracket to the building structure, because the waterproof property is improved and the metal is not scratched. . In particular, if the mounting bracket and the building structure have been subjected to anticorrosion treatment such as plating, when scratched, the anticorrosion treatment of this scratched part may be destroyed and rust may occur from this part. Therefore, it is preferable to prevent the mounting bracket and the building structure from being damaged by sandwiching the sheet.

According to the first aspect of the present invention, the inorganic outer wall surface material is attached to the building structure through the mounting metal fitting so that the inorganic outer wall surface material is movable in the plane direction of the inorganic outer wall surface material. However, there are two methods for attaching the inorganic outer wall surface material to the building structure in such a state.

That is, since the mounting metal fitting is provided between the inorganic outer wall surface material and the building structure, for example, the mounting metal fitting is attached to the inorganic outer wall surface material in the plane direction of the inorganic outer wall material. And a method of movably attaching the same to the third method.
As in the invention described in No. 5, there is a method of attaching the mounting bracket of the outer wall panel to the building structure so as to be movable in the surface direction of the inorganic outer wall material. Then, the outer wall panel may be attached to the building structure by only one of these methods, or both methods may be used together to attach the outer wall panel to the building structure.

Stepped screws used in the invention of claim 2 and the invention of claim 3 and the invention of claim 4 and claim 5
The stepped rivet used in the described invention is provided with a step portion, but this step portion may be provided integrally or may be formed by inserting a tubular body. Also, the diameter of the stepped portion is made larger than the threaded portion and the expandable portion. This is because the stepped screw is screwed into the inorganic outer wall material,
This is because when the stepped rivet is inserted from the mounting metal fitting or the extension part or the through hole provided in the building structure, it hits the building structure body or the mounting metal part or the extension part so that it cannot be screwed in or inserted any more. is there.

The height of the stepped portion is approximately equal to or slightly larger than the thickness of the mounting bracket or the thickness of the building structure.
This is because, as described above, when the stepped screw is screwed in or the stepped rivet is inserted, the head of the stepped screw or the flange part of the stepped rivet and the inorganic outer wall material or the mounting bracket are attached. This is because a gap is formed just enough for the mounting bracket or the building structure to enter, and the mounting bracket or the building structure is mounted in this gap. However, the step may sometimes penetrate the inorganic outer wall material or the building structure,
When a waterproof sheet or the like is provided between the inorganic outer wall material and the mounting bracket, it is necessary to slightly increase the height of the step.

Further, the diameter of the fitting, the extension or the through hole of the building structure is made larger than the diameter of the step portion. This is to allow the step to move to the left and right when the section enters.
At this time, if the difference between the diameter of the through hole and the diameter of the stepped portion is too small, when the position of the stepped screw or the stepped rivet shifts, the stepped portion will be caught by the mounting bracket and it will be difficult to enter. Since the mounting metal fitting between the inorganic outer wall material and the head part is loose, an appropriate size is preferable. Specifically, the difference between the two is preferably 1 to 3 mm.

Further, in the invention according to claim 2 and the invention according to claim 3, the diameter of the head of the stepped screw is smaller than the diameter of the stepped portion, and is larger than the diameter of the fitting and the through hole of the extended portion. But,
This is when the stepped screw is screwed into the inorganic outer wall material or the building structure through the mounting bracket or the through hole of the extension part, the mounting bracket or the extension part is pressed against the inorganic outer wall material or the building structure by the head. This is so that it can be done. Therefore,
When the washer is used to press the peripheral portion of the through hole with the head and the washer, since the head and the washer substantially act as the head, the head in the present invention means the head. It includes the parts and washers. Specifically, it is preferable to make the diameter of the head larger than the diameter of the fitting or the through hole of the extension by 2 mm or more.

According to the third aspect of the present invention, the stepped screw is screwed into the building structure. At this time, when the building structure is a metal plate, the tapping screw is easily screwed. Preferably. Further, the extended portion of the mounting bracket is in contact with the building structure, but at this time, the extended portion of the mounting bracket may be in contact with the indoor side surface of the building structure,
It may be in contact with the outdoor side surface.

That is, since the building structure generally does not move, a mounting bracket is usually pressed against the building structure, and a stepped screw is screwed into the building structure from the mounting bracket to attach the outer wall panel to the building structure. Install. Therefore, when you want to attach the mounting bracket to the building structure from the indoor side, it is sufficient to abut the extended portion of the mounting bracket on the indoor side surface of the building structure,
When mounting the mounting bracket from the outdoor side, the extension of the mounting bracket may be brought into contact with the outdoor side surface of the building structure.

In the invention according to claim 4 and the invention according to claim 5, the mounting bracket for the outer wall panel is mounted on the building structure by means of stepped rivets. The difference between the invention according to claim 4 and the invention according to claim 5 is that the direction in which the stepped rivet is inserted is different when the mounting bracket is mounted on the building structure.

That is, in the invention according to claim 4, the stepped rivet is inserted from the through hole provided in the mounting fitting into the through hole provided in the building structure, but in the invention according to claim 5, the opposite is true. Then, the stepped rivet is inserted from the through hole provided in the building structure into the through hole provided in the mounting member. Then, the diameter of the through hole on the front side is made larger than the diameter of the step portion, and the diameter of the through hole on the other side is made smaller than the step portion (specifically, it is preferable to make it 0.3 mm or more smaller). When the rivet is inserted, the step is brought into contact with the other side, and the expandable part is expanded to form an expanded deformed part.The expanded deformed part and the flange part sandwich the building structure and the mounting bracket for mounting. is there.

A detailed description will be given below. In the invention according to claim 4, as in the invention according to claim 3, the extended portion of the mounting bracket is brought into contact with the building structure, and the mounting bracket is mounted on the building structure. If you want to attach the metal fittings to the building structure, you just have to abut the extended part of the metal fittings on the indoor side of the building structure.If you want to attach the metal fittings from the outdoor side, extend the metal fittings to the outdoor side of the building structure. It suffices to abut the parts.

According to the invention of claim 5, the contact surfaces are opposite. That is, when it is desired to attach the outer wall panel from the outdoor side, an extension extending in the lateral direction is provided in the attachment, a through hole is provided in this extension, and the extension of the attachment is brought into contact with the indoor side surface of the building structure. If it is desired to attach the outer wall panel from the indoor side, the extended portion may be brought into contact with the outdoor side of the building structure.

Further, when it is desired to mount the outer wall panel from the indoor side without providing an extension portion protruding from the side edge portion of the inorganic outer wall surface material to the mounting bracket, a through hole is provided in the mounting bracket and the inorganic material to which the mounting bracket is mounted. A recess is provided on the back surface of the outer wall surface, the through hole of the mounting bracket and the recess of the inorganic outer wall surface material are aligned, and the mounting bracket is mounted on the back surface of the inorganic outer wall surface material, and the mounting bracket is used indoors for building structural materials. Place the expandable part and step of the stepped rivet through the through hole of the building structure and the through hole of the mounting bracket from the indoor side, and insert the expandable part at the tip into the recess. , This expandable part is expanded in the recess to form an expanded deformation part, and when the outer wall panel is attached to the building structure by sandwiching the mounting bracket and the building structure with the expanded deformation part of this stepped rivet and the flange. Good.

(Operation) In the invention according to claim 1, the outer wall panel is composed of the inorganic outer wall surface material and the mounting member, and the mounting member is provided with a through hole through which the fastening member penetrates, which is a portion of the fastening member. The diameter of the portion of the mounting bracket that is in the through hole is smaller than the diameter of the through hole, and the height is approximately equal to or slightly smaller than the thickness of the mounting bracket to form a stepped portion. Since the inorganic outer wall material is attached to the building structure such that the inorganic outer wall material can move in the plane direction of the inorganic outer wall material, the fastening member including the step of the mounting bracket is a through hole and a step. It is movably attached by the difference of.

Therefore, in the building having the mounting structure of the outer wall panel, even if the inorganic outer wall material and the building structure expand or contract due to changes in humidity or temperature, the building structure does not extend in the plane direction of the inorganic outer wall material. In a movable state, the attached inorganic outer wall material moves in the plane direction by the difference in expansion / contraction of the inorganic outer wall material and the building structure, and the inorganic outer wall material is not distorted. No warpage or cracks occur on the inorganic outer wall material.

According to the second aspect of the present invention, the mounting bracket is brought into contact with the back surface of the inorganic outer wall surface material, the stepped screw reaches the inorganic outer wall surface material through the through hole of the mounting bracket, and the step reaches the inorganic outer wall surface material. It is screwed in and the mounting bracket is attached to the inorganic outer wall material. In order to make such a structure, the stepped screw is screwed into the inorganic outer wall surface material through the through hole of the mounting member. Then, since the stepped portion of the stepped screw is larger than the threaded portion, the stepped portion cannot enter the inorganic outer wall surface material, and the screwing of the stepped screw stops when the stepped portion reaches the inorganic outer wall surface material.

The diameter of the through hole provided in the mounting member is smaller than the diameter of the head of the stepped screw and larger than the diameter of the step portion, and the height of the step portion is substantially equal to the thickness of the mounting member. Since it is made slightly larger, the step of the stepped screw screwed into the inorganic outer wall material enters the through hole of the mounting bracket, but the head can enter the through hole of the mounting bracket. At the same time as pressing the mounting bracket with this head, a gap is formed between the head and the inorganic outer wall material at the height of the step, that is, approximately equal to or slightly larger than the thickness of the mounting bracket. The mounting bracket is in the gap.

With this structure, one side of the mounting bracket is pressed by the head of the stepped screw, and the other side has the inorganic outer wall surface material, which is in a direction substantially perpendicular to the surface of the inorganic outer wall surface material. Although it is firmly attached so that it cannot move to either of the above, the mounting metal fitting is not firmly pinched by the head and the inorganic outer wall material.

As described above, the mounting bracket is not firmly pinched between the head and the inorganic outer wall surface material, and the diameter of the through hole provided in the mounting bracket is larger than the diameter of the stepped portion. The mounting metal fitting between the head of the screw and the inorganic outer wall material is movably mounted in the surface direction of the inorganic outer wall material by the difference between the diameter of the through hole of the mounting metal and the diameter of the step. . Then, this mounting bracket is attached to the building structure.

As described above, since the mounting metal fitting attached to the inorganic outer wall surface material so as to be movable in the plane direction of the inorganic outer wall surface material is mounted on the building structure, the outer wall panel mounting structure In a building, even if the inorganic outer wall material and the building structure expand and contract due to changes in humidity and temperature, only the difference in expansion and contraction between the inorganic outer wall material and the building structure
The inorganic outer wall surface material does not move in the surface direction with respect to the mounting bracket attached to the building structure, and the inorganic outer wall surface material is not distorted. Therefore, the inorganic outer wall surface material is not warped or cracked.

According to the third aspect of the present invention, the fitting is attached to the back surface of the inorganic outer wall surface material. Then, the extended portion of the mounting bracket is brought into contact with the building structure, and the stepped screw is screwed into the building structure through the through hole of the extended portion until the step reaches the building structure. Are attached to the building structure. In order to make such a structure, the stepped screw is screwed into the building structure through the through hole of the extension portion.

Then, since the stepped portion of the stepped screw is larger than the screw portion, the stepped portion cannot enter the building structure, and when the stepped portion reaches the building structure, the screwing of the stepped screw is stopped. . The diameter of the through hole provided in the extension through which the stepped screw passes is smaller than the diameter of the head of the stepped screw and larger than the diameter of the stepped portion. Since it is approximately equal to or slightly larger than the thickness of the metal fittings, the stepped part of the stepped screw screwed into the building structure can enter the through hole provided in the extension part, but the head part It cannot enter the through hole, and the mounting bracket is pressed by this head, and at the same time, a gap approximately equal to the height of the step between the head and the building structure, that is, the mounting bracket A gap is formed that is approximately equal to or slightly larger than the thickness, and the extended portion of the fitting is inserted into this gap.

Since this is the case, one of the extended portions of this mounting bracket is pressed by the head of the stepped screw,
There is a building structure on the other side, and the extension of the mounting bracket is
Although it is firmly attached so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall material, the head of the stepped screw and the inorganic outer wall material are not firmly pinched.

As described above, the extension portion of the mounting member is not firmly pinched by the head of the stepped screw and the inorganic outer wall surface material, and the diameter of the through hole provided in the extension portion of the mounting member is
Since the diameter of the stepped portion is larger than the diameter of the stepped screw, the mounting metal fitting between the head of the stepped screw and the building structure is made of inorganic outer wall In the plane direction of
It is movable.

As described above, since the fittings attached to the inorganic outer wall material are movably attached to the building structure in the plane direction of the inorganic outer wall material, the building having the outer wall panel mounting structure is constructed. Therefore, even if the inorganic outer wall material and the building structure expand and contract due to changes in humidity and temperature, the difference between the expansion and contraction of the inorganic outer wall material and the building structure causes the difference between the inorganic outer wall material and the building structure. The fittings attached to the wall material do not move in the plane direction with respect to the building structure, and the inorganic outer wall material is not distorted. Therefore, the inorganic outer wall surface material is not warped or cracked.

Further, the through hole of this mounting member is provided in the extended portion, and the mounting member is attached to the back surface of the inorganic outer wall surface material by protruding the extended portion from the side edge portion of the inorganic outer wall material. Since the extension of this mounting bracket is along the outdoor surface of the building structure, the stepped screw from the outdoor side is projected through the side edge of the inorganic outer wall material through the through hole of the mounting bracket. Exterior wall panels can be attached by screwing into the building structure. Therefore, even if it is difficult to replace the outer wall panel from the indoor side because there is a heat insulating material, an inner wall panel, etc. on the indoor side of the outer wall panel, in the building of the structure for mounting the outer wall panel of the invention of claim 3, , The outer wall panel can be removed or attached from the outdoor side at any time, the process of attaching the outer wall panel is not restricted, and it is convenient when the outer wall panel is replaced.

According to the fourth aspect of the present invention, the fitting is attached to the back surface of the inorganic outer wall surface material. Then, the extended portion of the mounting bracket is brought into contact with the building structure, the stepped portion of the stepped rivet is inserted into the through hole of the extended portion, and is abutted against the building structure. It is attached with a stepped rivet that sandwiches the building structure and the mounting bracket with the expanded deformation part that is expanded. In order to make such a structure, the stepped rivet is inserted into the through hole of the building structure from the through hole of the extension portion of the mounting member.

Then, the stepped portion of the stepped rivet has a diameter smaller than the diameter of the flange portion, larger than that of the expandable portion, and has a height approximately equal to or slightly larger than the thickness of the mounting bracket, and is extended. The part has a through hole whose diameter is smaller than the diameter of the flange part of the stepped rivet and larger than the diameter of the step part.
Since the building structure has a through hole whose diameter is smaller than that of the step of the stepped rivet and larger than that of the expandable part, the flange part cannot enter the through hole of the extension part, and the flange part Abutting on the extension part, the step part cannot enter the through hole of the building structure, hits the building structure, and a gap approximately equal to the step part between the flange part and the building structure, that is, A clearance equal to or slightly larger than the thickness of the mounting bracket is formed, and the mounting bracket is inserted into this clearance so that only the expandable portion passes through the through hole of the building structure.

As described above, when the expandable portion is expanded to form an expansion deforming portion in a state where only the expandable portion passes through the through hole of the building structure, the building structure and the mounting bracket are formed by the flange portion and the expansion deforming portion. The building structure and the mounting bracket are connected to each other with the extension part of the. Because of this, the mounting bracket sandwiched between the flange of the stepped rivet and the building structure is firmly attached to the building structure so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall material. However, the mounting bracket is not firmly clamped between the flange and the building structure.

As described above, since the mounting metal fitting is not firmly clamped between the flange portion and the building structure, and the diameter of the through hole provided in the extended portion of the mounting metal fitting is larger than the diameter of the step portion, The mounting metal fitting between the flange portion of this stepped rivet and the building structure can be moved in the surface direction of the inorganic outer wall surface material by the difference between the diameter of the through hole of the mounting metal fitting and the diameter of the step portion. It is in a state.

As described above, since the mounting bracket attached to the inorganic outer wall material is movably attached to the building structure in the plane direction of the inorganic outer wall material, the building having the outer wall panel mounting structure is constructed. Therefore, even if the inorganic outer wall material and the building structure expand and contract due to changes in humidity and temperature, the difference between the expansion and contraction of the inorganic outer wall material and the building structure causes the difference between the inorganic outer wall material and the building structure. The fittings attached to the wall material do not move in the plane direction with respect to the building structure, and the inorganic outer wall material is not distorted. Therefore, the inorganic outer wall surface material is not warped or cracked.

Further, the through hole of this mounting member is provided in the extension portion, and the mounting member is attached to the back surface of the inorganic outer wall surface material by protruding the extension portion from the side edge portion of the inorganic outer wall material. Since the extension of this mounting bracket is along the outdoor surface of the building structure, the stepped screw from the outside direction is projected through the side hole of the inorganic outer wall material through the through hole of the mounting bracket. The outer wall panel can be attached from the outdoor side by inserting a rivet into the through hole of the structure.

Therefore, even if it is difficult to replace the outer wall panel from the indoor side due to the heat insulating material, the inner wall panel, etc. on the indoor side of the outer wall panel, the mounting structure for the outer wall panel according to the invention of claim 3 In the building of, the outer wall panel can be removed and installed at any time from the outdoor side, and there is no restriction on the process of installing the outer wall panel,
It is convenient when replacing the outer wall panel.

According to the fifth aspect of the present invention, the mounting bracket is attached to the back surface of the inorganic outer wall material. Then, the mounting bracket is brought into contact with the building structure, the step of the stepped rivet is inserted into the through hole of the building structure, and the mounting bracket is abutted to expand the flange and expandable part. It is attached with a stepped rivet that sandwiches the building structure and the mounting bracket with the expanded deformation part.

In order to make such a structure, the stepped rivet is inserted from the through hole of the building structure into the through hole of the fitting. Then, the stepped part of the stepped rivet has a diameter smaller than the diameter of the flange part and larger than the diameter of the expandable part, and the height is substantially equal to the thickness of the building structure, but is slightly larger. , The diameter of the stepped rivet is smaller than the diameter of the stepped rivet, and the through hole is larger than the diameter of the expandable part, and the building structure has a diameter smaller than the diameter of the stepped rivet flange and larger than the stepped diameter. Since the through hole is provided, the flange part cannot enter the through hole of the building structure, but abuts the building structure, and the step part cannot enter the through hole of the mounting bracket. At the same time as hitting the metal fitting, a gap approximately equal to the step portion, that is, a gap approximately equal to or slightly larger than the thickness of the building structure, is formed between the flange portion and the mounting metal fitting, and the building structure enters the gap. Only the expandable part has passed through the hole of the mounting bracket It made.

As described above, when the expandable portion is expanded to form an expansion deforming portion with only the expandable portion passing through the through hole of the mounting bracket, the flange and the expansion deforming portion connect the building structure and the mounting bracket. The building structure and the mounting bracket are connected with each other. Because of this, the building structure sandwiched between the flange of the stepped rivet and the mounting bracket is firmly attached to the mounting bracket so that it does not move in a direction substantially perpendicular to the surface of the inorganic outer wall material. However, the building structure is not firmly pinched by the flange and the mounting bracket.

As described above, since the inorganic outer wall surface material is not firmly pinched between the flange portion and the fitting, and the diameter of the through hole provided in the building structure is larger than the diameter of the step portion, this step is not necessary. The building structure between the flange of the rivet and the mounting bracket can be moved in the surface direction of the inorganic outer wall material by the difference between the diameter of the through hole of the building structure and the diameter of the step. ing. And, since this building structure is movable in the plane direction of the inorganic outer wall surface material, since the movement of the building structure and the mounting bracket is relative, it is possible to move the mounting bracket to the building structure. It is the same as being installed.

As described above, since the mounting bracket to which the inorganic outer wall material is attached is movably attached to the building structure in the surface direction of the inorganic outer wall material, the building having the outer wall panel mounting structure is attached. Therefore, even if the inorganic outer wall material and the building structure expand and contract due to changes in humidity and temperature, the difference between the expansion and contraction of the inorganic outer wall material and the building structure causes the difference between the inorganic outer wall material and the building structure. The fittings attached to the wall material do not move in the plane direction with respect to the building structure, and the inorganic outer wall material is not distorted. Therefore, the inorganic outer wall surface material is not warped or cracked.

[0058]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to examples. (Embodiment 1) FIGS. 1 to 7 show an embodiment in which the present invention is applied to a unit building. FIG. 1 (a) is a perspective view showing the unit building, and (b) is A- of (a). Sectional drawing in line A, FIG. 2 is a partially cutaway perspective view showing a building unit, FIG.
(A) is a perspective view showing the outer wall panel with the front surface facing upward, (B) is a perspective view showing the outer wall panel with the back surface facing upward, and (C) is a cross section taken along line BB of (B). Figure, Figure 4
Is a front view showing a stepped screw, FIG. 5 is a perspective view showing a mounting bracket, FIG. 6 is a perspective view of a rivet, FIG. 7 (a) is a front view showing the back surface of an outer wall panel used in an experiment, and (b) is It is a front view which shows the stepped screw used for experiment.

1 to 7, U is a unit building, and as shown in FIG. 1, this unit building U has nine building units 1 installed on a foundation 9 to form a first floor, Nine building units 1 are installed on the building unit 1 on the first floor to form the second floor, and a roof panel 95 is mounted on the building unit 1. As shown in FIG. 2, in the building unit 1, four steel rectangular column-shaped pillars 11 that are erected at the four corners of the rectangular shape and the lower ends of the pillars 11 are connected along rectangular sides. It has a skeleton composed of a floor beam 12 made of steel and having a U-shaped cross section, and a ceiling beam 13 made of steel and having a U-shaped cross section and having upper ends connected to each other along a rectangular side.

Then, in the building unit 1, a square steel rectangular floor beam 14 is passed over the floor beams 12 of the skeleton, and a wooden floor joist 15 is mounted on the floor beam 14. A floor board 16 of particle board is attached on the floor joist to form a floor, and a wooden ceiling edge 17 is passed over the ceiling beams 13 of the skeleton facing each other, and under this ceiling edge 17, a plaster board ceiling material. 18 is attached to form a ceiling.

In the place where the outer wall is provided, the floor beam 12 and the ceiling beam 13 are provided with a stud 2 which is a building structure having a long U-shaped section made of steel, and the stud 2 is attached to the stud 2 as shown in FIG. As shown in FIG. 3, the outer wall panel 3 and the inner wall panel 4 are attached, and the glass wool heat insulating material 45 is attached between the outer wall panel 3 and the inner wall panel 4 to form the outer wall. The outer wall panel 3 is formed by placing a water-containing molding material for molding described in JP-B-4-45471 in a molding die and curing it to form an inorganic outer wall material 31.
As shown in FIG. 3, a mounting bracket 32 is attached to the back surface of the No. 1 with stepped screws 6, and a grid-like uneven pattern is provided on the front surface.

As shown in FIG. 5, the mounting bracket 32 used at this time is provided with a plurality of through holes 321 for inserting the stepped screws 6 and a plurality of through holes 322 for inserting the rivets 7. This is a long plate-like body, and this mounting bracket 32
Is approximately equal to the length of the inorganic outer wall surface material 31. Further, the inorganic outer wall surface material 31 is provided with a recess 36 at a position facing the through hole 322 so that the rivet 7 can be easily inserted.

As shown in FIG. 4, the stepped screw 6 comprises a head portion 61, a screw portion 62, and a step portion 63 provided between the head portion 61 and the screw portion 62. The diameter α of the head portion 61 is larger than the diameter β of the step portion 63, and the diameter β of the step portion 63 is equal to the screw portion 62.
Is larger than the diameter γ of. The diameter δ of the through hole 321 of the mounting member 32 is smaller than the diameter α of the head portion 61 and larger than the diameter β of the step portion 63.

Then, as shown in FIGS. 3B and 3C, the two fittings 32 are respectively attached to the inorganic outer wall surface material 31.
The stepped screws 6 that are placed on both side edges of the back surface of the and are passed through the through holes 321 are screwed into the inorganic outer wall surface material 31, and the mounting bracket 32 is attached to the inorganic outer wall surface material 31. The fitting 32 is attached to the stud 3 with the rivet 7.

The rivet 7 used at this time is disclosed in Japanese Patent Laid-Open No.
It has substantially the same structure as that described in JP-A-1-106848. That is, as shown in FIG.
A tubular web 72 projecting substantially perpendicularly from the center of the flange portion 71, an expandable portion 73 extending at the tip of the web 72, and a pulling piece 7 provided at the tip.
4 and a shaft 75.

The shaft 75 has the center of the flange 71,
Pulling piece 74 through tubular web 72 and expandable portion 73
The expandable portion 73 is provided with a split 731. Then, the method of using the rivet 7 is such that the two plate-shaped bodies to be connected are superposed, and the pulling piece 74, the expandable part 73, and the web 72 are passed through the through holes provided in the two plate-shaped bodies, and the flange is inserted. When the portion 71 is brought into contact with the front plate-like member and the shaft 75 is pulled strongly, the pulling piece 74 connected to the shaft 75 is pulled, and as a result, the expandable portion 73 penetrating therethrough is pulled. The expansion deformed portion 59 is crushed and spreads outward while the crack 731 is opened, and the expanded deformable portion 79 expanded by the expandable portion 73 and the flange portion 71 press the two plate-like bodies to press the two plates. It connects the shaped bodies.

The stud 2 is an elongated body made of steel and having a U-shaped cross section.
The stud 2 is provided with a through hole 21 at a position facing the through hole 322 of the fitting 32. Then, as shown in FIG. 2B, the outer wall panel 3 is pressed against two adjacent studs 2 and the through hole 2 provided in the stud 2 is formed.
1 and the through hole 322 of the mounting bracket 32 of the outer wall panel 3, and the rivet 7 is attached. The inner wall panel 4 is a wooden frame 41 to which an inner wall material 42 of gypsum board is attached, as shown in FIG. It is attached to a wooden brick 28 attached to the side surface. Since the roof panel 95 is substantially the same as the conventional one, the description is omitted.

Next, a method of constructing the unit building 1 will be described. At the factory, as shown in FIG. 2, four pillars 11 are erected at the four corners of the rectangular shape, and the lower ends of the pillars 11 are connected by floor beams 12 along the sides of the rectangular shape. The parts are connected by the ceiling beams 13 along the sides of the rectangle to manufacture the skeleton of the building unit 1.

Then, the floor beam 14 is passed over the floor beams 12 of the skeleton facing each other, and the floor joist 15 is placed on the floor beam 14.
A floor surface material 16 is mounted on the floor joists 15 to form a floor, and the ceiling field edge 17 is passed to the ceiling beams 13 of the skeleton facing each other, and the ceiling surface material 1 is attached to the lower surface of the ceiling field edge 17.
Attach 8 to form the ceiling. In addition, in the place where the outer wall is provided, the stud 2 is passed over the floor beam 12 and the ceiling beam 13, and the outer wall panel 3 and the inner wall panel 4 are attached to the stud 2.
A heat insulating material 45 is attached between the outer wall panel 3 and the inner wall panel 4 to form an outer wall. In addition, the building unit 1 is completed by performing various finishings.

A method of attaching the outer wall panel 3 at this time will be described. First, the water-containing molding material for molding described in JP-B-4-45471 is placed in a molding die and cured to form a grid-like uneven pattern on the front surface, and the recess 3 on the back surface.
The inorganic outer wall surface material 31 provided with 6 is manufactured. Also, the mounting bracket 32 is manufactured. At this time, a through hole 321 and a through hole 322 are provided in the mounting bracket 32, and the diameter δ of the through hole 321 is set.
Is smaller than the diameter α of the head 61 of the stepped screw 6, and the through hole 3
The diameter of 22 is set so that the web 72 of the rivet 7 and the expandable portion 73 pass through.

Then, the butyl caulking material 37 is applied to the side edge portion of the back surface of the inorganic outer wall surface material 31, and the recess 36 and the through hole 322 on the back surface of the inorganic outer wall material 31 are aligned on the butyl caulking material 37. In this state, the mounting bracket 32 is placed, and the stepped screw 6 is screwed into the inorganic outer wall surface material 31 through the through hole 321 of the mounting bracket 32. Then, since the stepped portion 63 of the stepped screw 6 is larger than the threaded portion 62, the stepped portion 63 cannot enter the inorganic outer wall surface material 31, and when the stepped portion 63 reaches the inorganic outer wall surface material 31, the stepped screw is reached. The screwing of 6 stops.

At this time, the diameter δ of the through hole 321 provided in the mounting bracket 32 is smaller than the diameter α of the head 31 of the stepped screw 6 and larger than the diameter β of the stepped portion 63, and the diameter of the stepped screw 6 is smaller. Since the height of the stepped portion is substantially equal to or slightly larger than the thickness of the mounting bracket 32, the stepped portion 63 of the stepped screw 6 screwed into the inorganic outer wall surface material 31 has the through hole 321 of the mounting bracket 32. Although it goes inside, the head portion 61 cannot enter the through hole 321 of the mounting member 32, and the mounting member 32 is pressed by the head portion 61, and at the same time, the head portion 61 and the inorganic outer wall surface material 31 are separated from each other. A gap that is approximately equal to or slightly larger than the height of the stepped portion 63, that is, the thickness of the mounting bracket 32 is formed between the mounting bracket 32 and the mounting bracket 32. It is attached to the material 31.

In this way, the outer wall panel 3 is completed by mounting the mounting brackets 32 on both side edges of the back surface of the inorganic outer wall material 31. In the outer wall panel 3 thus mounted, the mounting bracket 32 has the head 6 of the stepped screw 6 on one side.
There is an inorganic outer wall surface material 31 on the other side, which is pressed by 1, so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31, and the head 61 of the stepped screw 6 and the inorganic outer wall material 31. The mounting bracket 32 between and is the stepped screw 6
By the difference between the diameter β of the stepped portion 63 and the diameter δ of the through hole 321 of the mounting member 32, the inorganic outer wall material 31 is mounted so as to be movable in the surface direction.

Next, a polyethylene foam sheet 29 is attached to the outdoor surface of the stud 2, and the outer wall panel 3 is passed over the two adjacent studs 2 from above to form the through holes 21 provided in the stud 2. , Through holes 322 of the mounting plate 32 of the outer wall panel 3
And match. Next, the web 72 of the rivet 7, the non-flange portion 73, and the pulling piece 74 are inserted from the indoor side into the recess 36 through the through hole 31 of the stud 3 and the through hole 322 of the mounting bracket 32, and the flange portion 71 Is brought into contact with the stud 2, and the shaft 75 of the rivet 7 is strongly pulled.

Then, the pulling piece 74 at the tip is pulled, the split 731 of the expandable portion 73 spreads outward while cracking in the recess 36, and the deformed and expanded portion 79 is formed.
While the web 72 is in the through hole 21 of the stud 2 and the through hole 321 of the mounting bracket 32, the stud 2 and the mounting bracket 32 are clamped by the flange portion 71 and the deformed and expanded portion 79, as shown in FIG.
As shown in (b), the outer wall panel 3 is firmly fixed to the stud 2. Finally, the building unit 1 is completed by attaching a gasket 39 made of synthetic rubber between the outer wall panel 3 and the adjacent outer wall panel 3 and performing various finishings.

In the building unit 1 to which the outer wall panel 3 is attached in this manner, the mounting metal fitting 32 is arranged so that the mounting metal fitting 32 does not move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31. It is attached to the material 31, and in the direction of the surface of the inorganic outer wall surface material 31, a mounting bracket 32
Is movably attached to the inorganic outer wall material 31 by the difference between the diameter β of the stepped portion 63 of the stepped screw 6 and the diameter δ of the through hole 321 of the attachment 32, so that the outer wall on which the attachment 32 is attached The material 31 is movably mounted in the surface direction of the inorganic outer wall surface material 31 by the difference between the diameter of the stepped portion 63 of the stepped screw 6 and the diameter of the through hole 321 of the mounting bracket 32. Also, the roof panel 95 and the like are manufactured.

The building unit 1 and the roof panel 95 manufactured as described above are transported to a construction site, and at the construction site, nine building units 1 are installed on the foundation 9 provided in advance.
Is installed to form the first floor, and this first-floor building unit 1
9 building units 1 are installed on the above to form the second floor, a roof panel 95 is attached on the building unit 1, and other various finishings are performed to complete the unit building U.

In the unit building U completed in this way, the studs 2 and the inorganic outer wall material 31 expand and contract with changes in temperature and humidity, and the difference between the expansion and contraction of the studs 2 and the inorganic outer wall material 31 becomes the inorganic outer wall material. Although stress is generated, at this time, the inorganic outer wall surface material 31 is attached to the stud 3 through the mounting metal fitting 32 in the surface direction of the inorganic outer wall surface material 31 and the diameter β of the stepped portion 63 of the stepped screw 6 and the mounting metal fitting. Since it is movably attached by the difference of the diameter δ of the through hole 321 of 32, the inorganic outer wall surface material 31 moves in the surface direction of the inorganic outer wall surface material 31 due to this stress, and the inorganic outer wall surface material 31 is distorted. Does not occur. Therefore, the inorganic outer wall surface material 31 is not warped or cracked.

Next, the following experiments and comparative experiments were carried out in order to test that the inorganic outer wall surface material 31 was not warped or cracked. (Experimental Example 1) The width is about 450 mm and the length is about 2700 m.
As shown in FIG. 7 (a), the thickness is about 1.6 mm, the width is about 100 mm, and the length is about 100 mm on each side of the back surface of the inorganic outer wall material 31 having a specific gravity of about 1.1. Approximately 2700 mm
7B, the length a below the head portion 61 shown in FIG. 7B is about 17 mm, and the diameter d of the head portion 61 is about 10 m.
m, a stepped screw 6 having a diameter c of the stepped portion 63 of approximately 6 mm and a thickness b of approximately 2 mm, and mounting brackets 32 provided at six positions (+ positions in the figure) of the side edge portion at a pitch of 500 mm. The outer wall panel 1 was manufactured by being screwed into the inorganic outer wall surface material 31 through the through holes 321.

At this time, the through hole 3 provided in the mounting bracket 32
The diameter c of 21 is 6 mm in the longitudinal direction from the diameter c of the stepped portion 63.
The diameter is larger than the diameter of the stepped portion 63 in the width direction by 2 mm. Then, the outer wall panel 1 is pressed against the studs 2, the rivets 5 are passed through the through holes provided at the six side edge portions (positions marked with X in the figure), and the mounting bracket 32 is fixed to fix the outer wall panel 3 to the outer wall panel 3. I installed it. When the building unit 1 to which the outer wall panel 3 was attached was put in a dryer at 80 ° C. and dried for 8 hours, there was no abnormality.

(Experimental Example 2) The length a below the head portion 61 is about 17 mm, the diameter d of the head portion 61 is about 11.5 mm, the step diameter c is about 7.5 mm, and the thickness b is about 2 mm. When an experiment was performed in the same manner as in Experimental Example 1 except that a certain stepped screw 6 was used, no abnormality was found.

(Experimental Example 3) A stepped screw having a length a below the head 61 of about 17 mm, a diameter d of the head 61 of about 9 mm, a step diameter c of about 5 mm, and a thickness b of about 2 mm. An experiment was conducted in the same manner as in Experimental Example 1 except that 6 was used.
Fine cracks were generated in the inorganic outer wall material 31.

COMPARATIVE EXPERIMENTAL EXAMPLE 1 Except that a screw having no step and having a length a below the head 61 of about 17 mm and a diameter d of the head 61 of about 9 mm is used, is substantially the same as that of Experimental Example 1. As a result of the experiment, the inorganic outer wall surface material 31 was cracked. From Experimental Examples 1 to 3 and Comparative Experimental Example 1, it is understood that the stepped screw 6 is extremely effective against cracks.

(Embodiment 2) FIGS. 8 and 9 show another embodiment of the present invention. FIG. 8 (a) is a perspective view of the outer wall panel with its surface facing upward, and (b) shows the outer wall. FIG. 9 is a perspective view of the panel with the back surface facing upward, FIG. 9C is a cross-sectional view taken along line CC of FIG. 9A, and FIG. 9 is a cross-sectional view of a state in which the outer wall panel is attached to the stud.

Embodiment 2 shown in FIGS. 8 and 9 is shown in FIGS.
Compared to the first embodiment shown in FIG. 7, the structure of the outer wall panel 3a and the mounting structure of the outer wall panel 3a are different, and the others are substantially the same, and therefore the different points will be mainly described.

The main differences in the structure of the outer wall panel 3a are:
As shown in FIG. 8, the mounting member 32a has an extension portion 33a, and the extension portion 33a of the mounting member 32a is placed so as to project from the side edge portion of the inorganic outer wall surface material 31a, and the extension portion 33a is a step portion. That is, it is attached to the inorganic outer wall surface material 31a by a normal screw 6a without a screw. The main difference in the mounting structure of the outer wall panel 3a is that, as shown in FIG. 9, the stepped screw 5a is attached to the extension 33a of the mounting bracket 32a.
The outer wall panel 3a is attached to the stud 2a by being screwed into the stud 2a, which is a building structure, through the through hole 322a provided in the stud 2a.

That is, the outer wall panel 3a is used as a molding die.
The water-containing molding material for molding described in JP-B-4-45471 is placed in a molding die and cured to form an inorganic outer wall surface material 31a. On both side edges of the back surface of the inorganic outer wall surface material 31a. As shown in FIG. 8, the mounting bracket 32a is mounted with screws 6a.

The outer wall panel 3a will be described in more detail. The mounting metal fitting 32a used at this time is a long plate-like member having a length substantially equal to the length of the inorganic outer wall material 31a.
A plurality of through holes 321a for inserting the screws 6a are provided, and the stepped screws 5a are provided on the extension portion 33a of the mounting bracket 32a.
A plurality of through holes 322a for screwing in are provided. The wall panel 3a is mounted by mounting the two mounting brackets 32a on both side edges of the back surface of the inorganic outer wall surface material 31a, with the extension portion 33a protruding outward, and inserting the screw 6a into the through hole 32.
The mounting metal fitting 32a is attached to the inorganic outer wall surface material 31a by threading it through the inorganic outer wall surface material 31a.

As shown in FIG. 9, the outer wall panel 3a is pressed against the two adjacent studs 2a, and the through hole 322a is provided in the extension portion 33a of the fitting 32a.
And a through hole 21a provided in the stud 2a, and is attached by a stepped screw 5a screwed into the stud 2a.

The stepped screw 5a used at this time is substantially the same as the stepped screw used in the first embodiment. That is, the head portion 51a and the screw portion 52a, and the head portion 51a and the screw portion 52
It consists of a stepped portion 53a provided between a. Head 51
The diameter of a is larger than the diameter of the step portion 53a, and the diameter of the step portion 53a is larger than the diameter of the screw portion 52a. Further, the diameter of the through hole 322a in the extended portion 33a of the mounting member 32a is smaller than the diameter of the head portion 51a and larger than the diameter of the step portion 53a.

Next, a method of constructing this unit building will be described. Manufacture building units at the factory. At this time, in the place where the outer wall is provided, as in the first embodiment, the studs 2a are passed between the floor beams and the ceiling beams, and the outer wall panel 3a and the inner wall panel are attached to the studs 2a.
An outer wall is formed by attaching a heat insulating material between a and the inner wall panel.

A method of attaching the outer wall panel 3a at this time will be described. First, the water-containing molding material for molding described in JP-B-4-45471 is placed in a molding die and cured to manufacture an inorganic outer wall surface material 31a having a grid-like uneven pattern on the surface. . Also, the mounting bracket 32a is manufactured. At this time, a through hole 321a is formed in the fitting 32a, and
A through hole 322a is provided in the extension portion 33a. The diameter of the through hole 321a is smaller than the diameter of the head of the screw 6a, and the diameter of the through hole 322a is smaller than the diameter of the head 51a of the stepped screw 5a. It is made larger than the diameter of the portion 53b.

Then, a butyle caulking material 37a is applied to the back surface of the inorganic outer wall surface material 31a, and a fitting 32a and an extension portion 33 are provided on the butyl caulking material 37a.
When a is protruded from the side edge of the inorganic outer wall surface material 31a and placed, and the screw 6a is passed through the through hole 321a of the mounting bracket 32a and screwed into the inorganic outer wall surface material 31a, it is attached to the inorganic outer wall surface material 31a. The metal fitting 32a is firmly attached. In this way, when the mounting metal fittings 32a are attached to both side edges of the back surface of the inorganic outer wall surface material 31a, the outer wall panel 3a is completed.

Next, a foamed polyethylene sheet 29a is attached to the outdoor side surface of the stud 2a. And the outer wall panel 3
a is pressed against two adjacent studs 2a, and the stepped screw 5a is screwed into the stud 2a from the outdoor side through the through hole 322a provided in the extension portion 33a of the mounting bracket 32a. Then, since the diameter of the stepped portion 53a of the stepped screw 5a is larger than the diameter of the through hole 21a of the stud 2a, the stepped portion 53a cannot enter the through hole 21a of the stud 2a, and the stepped portion 53a cannot be inserted into the stud 2a.
When it reaches, the screwing of the stepped screw 5a stops.

At this time, the extended portion 33a of the fitting 32a
The diameter of the through hole 322a provided in the
Is smaller than the diameter of the head portion 31a and larger than the diameter of the step portion 53a, and the height of the step portion 53a of the stepped screw 5a is the same as that of the extension portion 3a.
Since it is approximately equal to or slightly larger than the thickness of 3a,
Stepped screw 5 screwed into the stud 2a from the extension portion 33a
The stepped portion 53a of "a" enters the through hole 322a of the extension portion 33a, but the head portion 51a of the step portion 53a of the a portion of the extension portion 33a is through hole 322.
Since the head portion 51a cannot press the extension portion 33a, the height between the head portion 51a and the stud 2a is substantially equal to the height of the step portion 53a, that is, the thickness of the extension portion 33a. A slightly larger gap is formed, and the extension 3
3a is inserted, and the mounting bracket 32a becomes the stud 2a.
Attached to.

The outer wall panel 3a attached in this way
Then, one of the extended portions 33a of the mounting bracket 32a is pressed by the head portion 51a of the stepped screw 5a, and the other is the stud 2
a so that it does not move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31a, and the extended portion 33a of the mounting bracket 32a that is inserted between the head 51a of the stepped screw 5a and the stud 2a is The difference between the diameter of the stepped portion 63b of the stepped screw 5b and the diameter of the through hole 322a of the extension portion 33a is equal to the inorganic outer wall surface material 31.
It is movably attached in the plane direction of a. Finally, a building unit is completed by inserting a synthetic rubber gasket 39a between the outer wall panel 3a and the adjacent outer wall panel 3a and performing other finishing.

In the building unit completed in this way, the through hole 322a is provided with the extension portion 33a of the fitting 32a.
The outer wall panel 3a can be attached to the stud 2a from the outdoor side. Therefore, it can be attached even if there is an inner wall panel or attached furniture on the indoor side, and there is no restriction on the step of attaching the outer wall panel 3a, which is extremely convenient. We also manufacture roof panels.

The building units and roof panels manufactured in this way are transported to a construction site, and at the construction site, nine building units are installed in advance on the foundation provided to construct the first floor. Nine building units are installed on the building unit on the first floor to form the second floor, roof panels are mounted on this building unit, and other various finishing is performed to complete the unit building.

In the unit building completed in this way, the studs 2a and the inorganic outer wall material 31a expand and contract with changes in temperature and humidity, and stress is applied to the inorganic outer wall material due to the difference in expansion and contraction between the two. Occurs, but at this time, the mounting bracket 32 mounted on the inorganic outer wall surface material 31a
a is the stud 3a, the diameter of the stepped portion of the stepped screw 5a and the through hole 321 of the mounting bracket 32a in the surface direction of the inorganic outer wall surface material 31a.
Since the inorganic outer wall surface material 31a is attached so as to be movable by the difference in the diameter of a, the inorganic outer wall surface material 31a moves in the surface direction to relieve this stress, and the inorganic outer wall surface material 31a is not warped or cracked.

Since the long fittings 32a are attached to the both side edges of the inorganic outer wall material 31a with the plurality of screws 5a, the difference in expansion / contraction between the inorganic outer wall material 31a and the fitting 32a is caused. Although the stress is generated, the mounting bracket 32
Since the thickness of a is small, the expansion / contraction force of the mounting bracket 32a is small, and the expansion / contraction of the inorganic outer wall surface material 31a is small.
It expands and contracts just as it contracts. Therefore, this mounting bracket 3
The expansion / contraction of 2a does not cause warping or cracks in the inorganic outer wall surface material 31a.

Further, a mounting bracket 32a attached to the stud 2a
Since the through hole 322a of the outer wall panel 3a is provided in the extension portion 33a, when the outer wall panel 3a is deteriorated or the outer wall panel 3a needs to be replaced in order to change the appearance of the outer wall panel 3a, the outer wall panel 3a is stepped. By screwing out the screws 5a from the outdoor side, the outer wall panel 3a can be easily
Remove the new exterior wall panel 3 with the same structure.
It is convenient that the outer wall panel 3a can be easily replaced by attaching a to the same with the stepped screw 5a.

(Embodiment 3) FIGS. 10 and 11 show another embodiment of the present invention. FIG. 10 is a sectional view showing a state that an outer wall panel is attached to a stud, and FIG. 11 is an outer wall used for an experiment. It is a front view which shows the back surface of a panel. Comparing the third embodiment shown in FIGS. 10 and 11 with the first embodiment shown in FIGS. 1 to 7, the structure of the outer wall panel 3b and the outer wall panel 3 will be described.
Since the attachment structure of b is different and the others are substantially the same, the description will be focused on this different point.

The main difference in the structure of the outer wall panel 3b is that
This is the point that the mounting bracket 32b is mounted with the stepped screw 6b. Further, the main difference in the mounting structure of the outer wall panel 3b is that the mounting bracket 32b is provided with an extension portion 33b, and the mounting bracket 32b is attached by the stepped screw 5a passing through the through hole 322b provided in the extension portion 33b. It is attached to the stud 2b which is a building structure.

That is, the mounting metal fitting 32b is made of the inorganic outer wall surface material 3
1b, as in the first embodiment, with stepped screws 5b, and the mounting bracket 32b is attached to the studs 2b with stepped screws 6b as in the second embodiment. Next, the structure of the outer wall panel 3b and the mounting structure of the outer wall panel 3b will be described in detail. The outer wall panel 3b is 4-45
The water-containing molding material for molding described in Japanese Patent No. 471 is placed in a molding die and cured to form an inorganic outer wall material 31b. At both side edges of the back surface of the inorganic outer wall material 31b,
The mounting bracket 32b is mounted with the stepped screw 6b.

The mounting fitting 32b used at this time is a long plate-like body having a length substantially equal to the length of the inorganic outer wall surface material 31b.
A plurality of through holes 321b for inserting the stepped screws 6b are provided, and the extended portion 3 protruding from the side edge of the inorganic outer wall surface 31b.
3b is provided, and a stepped screw 5a is provided on the extension portion 33b.
There are provided a plurality of through holes 322b for inserting. Then, the two mounting brackets 32b are respectively attached to the inorganic outer wall surface material 3
The extension powder 33b is placed on both side edges of the back surface of the No. 1 with the extension powder 33b protruding outward, and the stepped screw 6b is passed through the through hole 321b and screwed into the inorganic outer wall surface material 31b to attach the mounting bracket 32.
b is attached to the inorganic outer wall surface member 31b.

The outer wall panel 3b is provided between the two adjacent studs 2b, and the through hole 21 provided in the stud 2b.
b and the through hole 322b of the mounting bracket 32b of the outer wall panel 3b
It is attached by a stepped screw 5b screwed into the stud 2b. Stepped screws 5b and 6 used at this time
b is substantially the same as the stepped screw used in Example 1.
That is, the head portions 51b and 61b and the screw portions 52b and 62b.
And the head portions 51b and 61b and the step portions 53b and 63b provided between the screw portions 52b and 62b.

The diameter of the heads 51b and 61b is 5
The diameters of the stepped portions 53b and 63b are larger than the diameters of the screw portions 52b and 62b.
Further, the diameters of the through holes 322b and 321b of the mounting bracket 32b are smaller than the diameters of the head portions 51b and 61b, and the diameters of the step portions 53b and 6b.
It is larger than 3b.

Next, a method of constructing this unit building will be described. Manufacture building units at the factory. At this time, in the place where the outer wall is provided, the studs 2b are passed between the floor beams and the ceiling beams, the outer wall panel 3b and the inner wall panel are attached to the stud 2b, and the heat insulating material is attached between the outer wall panel 3b and the inner wall panel. Form the outer wall.

A method of attaching the outer wall panel 3b in this case will be described. First, the water-containing molding material for molding described in Japanese Patent Publication No. 4-45471 is placed in a molding die and cured to manufacture an inorganic outer wall surface material 31b having a grid-like uneven pattern on its surface. . Also, the mounting bracket 32b is manufactured. At this time, a through hole 321 and a through hole 322b are provided in the attachment portion 32b and the extension portion 33b. However, the diameter of the through hole 321b is made smaller than the diameter of the head portion 61b of the stepped screw 6b, and the through hole 322b is formed. The diameter is smaller than the diameter of the head portion 51b of the stepped screw 5b and larger than the diameter of the step portion 53b.

Then, the butyl caulking material 37b is applied to the side edge portion of the back surface of the inorganic outer wall surface material 31b, the mounting bracket 32b is placed on the side, and the stepped screw 6b is mounted on the mounting bracket 3.
It is screwed into the inorganic outer wall surface material 31b through the through hole 321b of 2b. Then, similarly to the first embodiment, the stepped screw 6b
Since the diameter of the stepped portion 63b is larger than the diameter of the screw portion 62b,
The screw portion 62b is screwed into the inorganic outer wall surface material 31b, but the step portion 63b cannot be inserted into the inorganic outer wall surface material 31b.
When the stepped portion 63b reaches the inorganic outer wall surface material 31b, the screwing of the stepped screw 6b is stopped.

At this time, the diameter of the through hole 321b provided in the fitting 32b is smaller than the diameter of the head portion 61b of the stepped screw 6a and larger than the diameter of the stepped portion 63b, and the stepped portion of the stepped screw 6b. The height of 63b is substantially equal to or slightly larger than the thickness of the mounting bracket 32b.
Stepped screw 6b screwed into the inorganic outer wall material 31b from
Although the stepped portion 63b of the head fits into the through hole 321b of the fitting 32b, the head 61b cannot enter the through hole 321b of the fitting 32b, and the head 61b presses the fitting 32b. A gap, which is approximately equal to or slightly larger than the height of the stepped portion 63b, that is, the thickness of the mounting bracket 32b, is formed between 61b and the inorganic outer wall surface member 31b, and the mounting bracket 32b is placed in this gap. Then, the mounting bracket 32b is attached to the inorganic outer wall surface member 31b.

Mounting bracket 3 thus mounted
In 2b, one side is pressed by the head 63b of the stepped screw 6b and the other has an inorganic outer wall surface material 31b, so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31b.
In addition, the head 61b of the stepped screw 6b and the inorganic outer wall surface material 31
The mounting bracket 32b between the b and the stepped screw 6
Only the difference between the diameter of the stepped portion 63b of b and the diameter of the through hole 321b of the mounting bracket 32b is movably attached in the surface direction of the inorganic outer wall surface material 31b. In this way, the inorganic outer wall surface material 3
The outer wall panel 3b is completed by attaching the fittings 32b to both side edges of the back surface of the 1b.

Next, a foamed polyethylene sheet 29b is attached to the outdoor side surface of the stud 2b. And the outer wall panel 3
b is pressed against the two adjacent studs 2b, and the stepped screw 5b is passed from the outdoor side through the through hole 322b provided in the extension portion 33b of the mounting bracket 32b to the stud 2b.
Screw in b. Then, since the diameter of the step portion 53b of the stepped screw 5b is larger than the diameter of the through hole 21b of the stud 2b, the step portion 5b
3b cannot enter the through hole 21b of the stud 2b, and when the step portion 53b reaches the stud 2b, the screwing of the stepped screw 5b stops.

At this time, the extended portion 33b of the mounting member 32b
The diameter of the through hole 322b provided in the
Is smaller than the diameter of the head portion 31b and larger than the diameter of the step portion 53b, and the height of the step portion 53b of the stepped screw 5b is equal to that of the extension portion 3
Since it is made approximately equal to or slightly larger than the thickness of 3b,
Stepped screw 5 screwed into the stud 2b from the extension portion 33b
The stepped portion 53b of "a" is inserted into the through hole 322b of the extension portion 33b, but the head portion 51a of the step portion 53b is a through hole 322 of the extension portion 33b.
Since the head portion 51b cannot press the extension portion 33b, the height of the step portion 53b, that is, the thickness of the extension portion 33b is substantially equal between the head portion 51b and the stud 2b. A slightly larger gap is formed, and the extension 3
3b is inserted, and the mounting bracket 32a is attached to the stud 2b.
Attached to. Finally, a gasket 39b made of synthetic rubber is inserted between the outer wall panel 3b and the adjacent outer wall panel 3b, and other finishing is performed to complete the building unit.

In the building unit to which the outer wall panel 3b is attached in this way, the extension portion 33b of the attachment fitting 32b is
One of them is pressed by the head 51b of the stepped screw 5b and the other has a stud 2b so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31b, and the head 51b of the stepped screw 5b. Mounting bracket 32b between the stud and the stud 2b
The extension portion 33a is attached movably in the surface direction of the inorganic outer wall surface material 31b by the difference between the diameter of the step portion 63b of the stepped screw 5b and the diameter of the through hole 322b of the extension portion 33b.

Further, since the through hole 322b is provided in the extended portion 33b of the fitting 32b, the outer wall panel 3b can be attached to the stud 2b from the outdoor side. Therefore, it can be attached even if there is an inner wall panel or attached furniture on the indoor side, and there is no restriction on the step of attaching the outer wall panel 3b, which is extremely convenient. We also manufacture roof panels.

The building units and roof panels manufactured in this way are transported to a construction site, and at the construction site, nine building units are installed in advance on the foundation provided to construct the first floor. The building unit is installed on the building unit on the first floor to form the second floor, and the roof panel is mounted on the building unit.

In the unit building completed in this way, the studs 2b and the inorganic outer wall material 31b expand and contract with changes in temperature and humidity, and stress is applied to the inorganic outer wall material due to the difference in expansion and contraction between the two. At this time, the mounting bracket 32b is attached to the inorganic outer wall surface material 31b by the stepped screw 6
The stud 3 is mounted so as to be movable by the difference between the diameter of the stepped portion 63b of b and the diameter of the through hole 321b of the mounting bracket 32b.
b, the stepped screw 5 in the surface direction of the inorganic outer wall surface material 31b.
Since it is movably attached by the difference between the diameter of the stepped portion of b and the diameter of the through hole 321b of the mounting bracket 32b, this inorganic outer wall surface material 31b moves in the surface direction to relieve this stress,
No warpage or cracks occur in the inorganic outer wall surface material 31b.

Further, since the outer wall panel 3b is provided in the extended portion 33b of the mounting bracket 32b, and the outer wall panel 3b needs to be replaced in order to change the appearance of the outer wall panel 3b, the outer wall panel 3b can be replaced. The outer wall panel 3b is removed by unscrewing the stepped screw 5b from the outdoor side, and a new outer wall panel 3b having substantially the same structure is attached to the outer wall panel 3b with the stepped screw 5b, and the outer wall panel 3b is easily replaced. It is possible and convenient.
In order to test that the inorganic outer wall surface material 31b was not warped or cracked, the following experiments and comparative experiments were performed.

(Experimental Example 4) An inorganic outer wall surface material 31a having a width of about 450 mm, a length of about 2700 mm, and a specific gravity of about 1.1.
As shown in FIG. 10, the side edges of the back surface of the sheet have a thickness of approximately 1.
6 mm, width 100 mm, length approximately 2700 mm, plate portion approximately 100 mm in width, and extension portion 33 b having a width of 10 mm
Mount the mounting bracket 32b that has been extended, JIS-B-11
Stepped screw 6b provided with a stepped portion under the head 61b of a pointed drilling tapping screw having a pot head conforming to 25.
(The length below the head portion 61b is about 17 mm, the diameter of the head portion 61b is about 10 mm, the diameter of the stepped portion 63b is about 6 mm, and the thickness is about 2 mm.)
The outer wall panel 1b was manufactured by screwing it into the inorganic outer wall surface material 31b through the through hole 321b of the mounting bracket 32b provided at the position (+) of 0).

At this time, the diameter of the through hole 321b provided in the mounting member 32b at this time is 6 mm larger in the longitudinal direction than the stepped portion and 2 mm in the widthwise direction than the stepped portion 33b.
Has been made big.

This outer wall panel 1b is a stud 2a having a thickness of 3 mm and a polyethylene foam sheet having an expansion ratio of 30 times attached thereto (flange length 50 mm, web length 100).
mm long section) with a nominal diameter of 3.5 m
m, the height of the step portion 33b is 3.6 mm, the diameter of the step portion 33b is 3.6 mm, and the length under the head portion 61b is 25 mm. The outer wall panel 3 was attached to the stud 2b by screwing it into the inorganic outer wall material 32b through the through hole 322b (indicated by a mark X in FIG. 10). The diameter of the through hole 322b is 0.5 mm larger than the diameter of the step portion 33b.

When the building unit to which the outer wall panel 3b was attached was put in a dryer at 80 ° C. and dried for 8 hours, there was no abnormality.

(Experimental Example 5) Nominal diameter 3.9 mm, step 33
The height of b is 3.6 mm, the diameter of the stepped portion 33b is 4.0 mm,
When an experiment was performed in substantially the same manner as in Experimental Example 4 except that the stepped screw 5b that was substantially the same as in Experimental Example 4 was used except that the length below the head portion 61b was 25 mm, there was no abnormality.

(Comparative Experimental Example 2) An experiment was carried out in substantially the same manner as in Experimental Example 4 except that a screw having no step portion 33b was used. As a result, the inorganic outer wall surface material was bent only by being attached to the stud 2b. It was When placed in a drier at 80 ° C. and dried for 8 hours, cracks occurred. From this experimental example and the comparative experimental example, it is understood that the stepped screws 5b and 6b are extremely effective against cracks.

(Embodiment 4) FIGS. 12 to 14 show still another embodiment of the present invention. FIG. 12 is a sectional view showing a state that an outer wall panel is attached to a stud, and FIG. 13 is a stepped rivet. FIG. 14 is a front view showing the back surface of the outer wall panel used in the experiment.

Embodiment 3 shown in FIGS. 12 to 14 is shown in FIG.
0 and the third embodiment shown in FIG. 11, the stepped screw is a stepped rivet 5c.
The difference will be mainly described. The stepped rivet 5c used at this time includes a flange portion 54c, a tubular expandable portion 55c which is an expansion deforming portion 59c, and a flange portion 5.
4c and the expandable portion 55c, a cylindrical step portion 5 provided between
6c, the pulling piece 5 provided at the tip of the expandable portion 55c
7c, and a shaft 58c connected to the pulling piece 57c passing through the center hole of the flange portion 54c, the center hole of the step portion 46c, and the center hole of the expandable portion 55c.

The diameter of the flange portion 54c is larger than the diameter of the step portion 57c, and the diameter of the step portion 56c is larger than the diameter of the expandable portion 55c. Also, an extension portion 33c of the mounting bracket 32c
The diameter of the through hole 322c is smaller than the diameter of the flange portion 54c and larger than the diameter of the step portion 55c. The stud 2c of the building unit 1c has a through hole 21c larger than the diameter of the expandable portion 55c of the stepped rivet 5c and smaller than the stepped portion.
Is provided.

Next, a method of constructing this unit building will be described. Manufacture building units at the factory. At this time, in the place where the outer wall is provided, the stud 2c is passed between the floor beam and the ceiling beam, the outer wall panel 3c and the inner wall panel are attached to the stud 2c, and the heat insulating material is attached between the outer wall panel 3c and the inner wall panel. Form the outer wall.

A method of attaching the outer wall panel 3c at this time will be described. First, the water-containing molding material for molding described in JP-B-4-45471 is put into a molding die and cured to manufacture an inorganic outer wall surface material 31c having a grid-like uneven pattern on its surface. . Also, the mounting bracket 32c is manufactured. At this time, a through hole 321c and a through hole 322c are provided in the extension part 33c in the mounting metal fitting 32c. The diameter of the through hole 321c is smaller than the diameter of the head portion 61c of the stepped screw 6c and larger than the step portion 63c. However, the diameter of the through hole 322c is smaller than the diameter of the flange portion 54c of the stepped rivet 5c, and the step portion 56c
Larger than the diameter of.

Then, a butyl caulking material 37c is applied to the side edge portion of the back surface of the inorganic outer wall surface material 31c, and on this,
Place the mounting bracket 32c and attach the stepped screw 6c to the mounting bracket 3
It is screwed into the inorganic outer wall surface material 31c through the through hole 321c of 2c. Then, since the diameter of the step portion 63c of the stepped screw 6c is larger than the diameter of the screw portion 62c, the screw portion 62c is screwed into the inorganic outer wall surface material 31c, but the step portion 63c can enter the inorganic outer wall surface material. Instead, when the stepped portion 63c reaches the inorganic outer wall surface material 31c, the stepped screw 6c stops screwing.

At this time, the diameter of the through hole 321c provided in the mounting bracket 32c is smaller than the diameter of the head portion 61c of the stepped screw 6c and larger than the diameter of the stepped portion 63c, and the stepped portion of the stepped screw 6c. Since the height of 63c is substantially equal to or slightly larger than the thickness of the mounting bracket 32c, the mounting bracket 32c
Screw 6c screwed into the inorganic outer wall material 31c from
Although the stepped portion 63c enters the through hole 321c of the mounting bracket 32c, the head 61c cannot enter the through hole 321c of the mounting bracket 32c, and the head 61c presses the mounting bracket 32c. Between the 61c and the inorganic outer wall surface material 31c, there is formed a gap that is approximately equal to or slightly larger than the height of the stepped portion 63c, that is, the thickness of the mounting bracket 32c, and the mounting bracket 32c is in this gap. Then, the mounting bracket 32c is attached to the inorganic outer wall surface material 31c.

Mounting bracket 3 thus mounted
In 2c, one side is pressed by the head 61c of the stepped screw 6c and the other has an inorganic outer wall surface material 31c so that it does not move in a direction substantially perpendicular to the surface of the inorganic outer wall surface material 31c. The mounting metal fitting 32c inserted between the head 61c of the stepped screw 6c and the inorganic outer wall surface material 31c has a diameter of the stepped portion 62c of the stepped screw 6c and a through hole 321 of the mounting metal fitting 32c.
The inorganic outer wall surface member 31c is attached so as to be movable in the plane direction by the difference in the diameter of c.

In this way, the outer wall panel 3c is completed by mounting the fittings 32c on both side edges of the back surface of the inorganic outer wall surface material 31c. Next, the polyethylene foam sheet 29c is attached to the outdoor surface of the stud 2c, and the adjacent 2
The outer wall panel 3c is pressed against the stud 2c of the book, and the through hole 21c provided in the stud 2c and the through hole 322c of the mounting plate 32c of the outer wall panel 3c are aligned. Next, from the indoor side, the expandable portion 55c of the stepped rivet 5c is attached to the mounting bracket 32.
Insert into the through hole 322c provided in the extended portion 33c of c and the through hole 21c provided in the stud 2c.

Then, since the diameter of the step portion 56c is larger than the through hole 21c provided in the stud 2c, and the height of the step portion 56c is substantially equal to or slightly larger than the thickness of the extension portion 33c of the mounting bracket 32c, The portion 56c cannot enter the through hole 21c of the stud 2c, and the step portion 56c abuts the stud 2c, and at the same time, the flange portion 54c abuts the mounting bracket 32c. Therefore, the height of the stepped portion 56c is formed between the flange portion 54c and the stud 2c, that is, the extension portion 33 of the mounting bracket 32c.
A gap approximately equal to or slightly larger than the thickness of c is formed, and the extension portion 33c is sandwiched in this gap.

Then, when the shaft 58c is strongly pulled, the pulling piece 57c is pulled, and the crack 551 of the expandable portion 55c is pulled.
The expandable portion 55c is opened while the c is cracked, and the expanded deformable portion 59 is opened.
Therefore, the flange portion 54c and the expansion deforming portion 59c sandwich the extended portion 33c of the mounting member 32c and the stud 2c. Finally, a building unit is completed by inserting a synthetic rubber gasket 39c between the outer wall panel 3c and the adjacent outer wall panel 3c and performing other finishing.

In the building unit to which the outer wall panel 3c is attached in this way, the extension portion 3 of the attachment fitting 32c is
3c has a flange portion 54 of the stepped rivet 5c on one side.
c and the stud 2c on the other side so as not to move in a direction perpendicular to the surface of the inorganic outer wall surface material 31c, and between the flange 54c of the stepped rivet 5c and the stud 2c. Since the extension portion 33c of the metal fitting 32c is not clamped, it is movably attached by the difference between the diameter of the step portion 56c of the stepped rivet 5c and the diameter of the through hole 322c of the extension portion 33c. We also manufacture roof panels.

The building units and roof panels manufactured in this way are transported to a construction site, and at the construction site, nine building units 1c are previously installed on the foundation provided to construct the first floor, The building unit 1c is installed on the building unit 1c on the first floor to form the second floor, and the roof panel is mounted on the building unit 1c.
A unit building is completed after various finishes.

In the unit building completed in this way, the studs 2c and the inorganic outer wall material 31c expand and contract with changes in temperature and humidity, and stress is applied to the inorganic outer wall material due to the difference between the expansion and contraction of the two. However, at this time, the mounting metal fitting 32c has a diameter of the stepped portion 63c of the stepped screw 6c and a through hole 321 of the mounting metal fitting 32c in the surface direction of the inorganic outer wall surface material 31.
The mounting bracket 32c is mounted so as to be movable by the difference in diameter of c, and is mounted on the inorganic outer wall surface material 31c.
Is movably attached to the stud 3c in the surface direction of the inorganic outer wall surface material 31c by the difference between the diameter of the stepped portion 56c of the stepped rivet 5c and the diameter of the through hole 322c of the mounting bracket 32c. The wall material 31c moves in the plane direction,
This stress is relaxed, and the inorganic outer wall surface material 31c is not warped or cracked.

In order to test that the inorganic outer wall surface material 31c was not warped or cracked, the following experiments and comparative experiments were conducted. (Experimental example 6) Inorganic outer wall material 31 having a width of 450 mm, a length of 2700 mm and a specific gravity of 1.1
At the side edge of the back surface of c, as shown in FIG. 14, a plate-like body having a thickness of about 1.6 mm and a width of about 100 mm has a width of about 20 m.
The mounting metal fitting 32c in which the extended portion 33c of m is extended has a length below the head portion 61c of 17 mm, and the diameter of the head portion 61c is approximately 1 mm.
A stepped screw 6c having a diameter of 0 mm, a stepped portion 63c of approximately 6 mm, and a height of approximately 2 mm is screwed into the inorganic outer wall surface material 31c through the through holes 321c at six locations (positions marked with + in FIG. 14).
An outer wall panel 3c was manufactured by attaching a mounting bracket 32c to the inorganic outer wall material 31c.

At this time, the diameter of the through hole 321c in the longitudinal direction is approximately 6 mm longer than the diameter of the stepped portion 63c, and the diameter in the width direction is
It is approximately 2 mm larger than the diameter of the stepped portion 63c. This outer wall panel 3
c is pressed against the stud 2c to which a polyethylene foam sheet having a thickness of 3 mm and an expansion ratio of 30 times is attached, and the flange portion 5
4c has a diameter of 6.4 mm, a stepped portion has a diameter of 3.6 mm, a height of 3.6 mm, an expandable portion 55c has a diameter of 3.2 mm, and a length of 4 mm has a stepped rivet 5c to extend the mounting bracket 32c. Through hole 322c provided in portion 33c and through hole 21c of stud 2c
The expandable portion 55c is expanded to form an expanded deformed portion 59c, and the extended wall portion 3c is attached to the external wall panel 3c with the expanded deformed portion 59c and the flange portion 54c sandwiching the extended portion 33c and the stud 2a.

The diameter of the through hole 322c provided in the extended portion 33c is 0.5 mm larger than the diameter of the step portion 5,
The diameter of the through hole 21c provided in the stud 2c is 3.4 mm.
And the diameter of the step is smaller than 3.6 mm. When the building unit 1a to which the outer wall panel 3c was attached was put in a dryer at 80 ° C. and dried for 8 hours, there was no abnormality.

(Comparative Experimental Example 3) About the same as Experimental Example 6 except that an outer wall panel was manufactured by using a screw without a step and the outer wall panel was attached to a stud by using a rivet without a step. A building unit was manufactured and cracked when it was similarly dried. From this experiment and comparative experiment, it is found that the stepped screw 6c and the stepped rivet 5c are extremely effective against cracks.

(Embodiment 5) FIGS. 15 and 16 show still another embodiment of the present invention. FIG. 15 (a) is a perspective view showing the outer wall panel with the back surface facing upward, (b). Is (a)
16 is a sectional view taken along the line D-D of FIG.

Comparing Example 5 shown in FIGS. 15 and 16 with Example 4 shown in FIGS. 12 and 14, the main difference of the outer wall panel 3d is that the recess 36d is provided in the inorganic outer wall material 31d. That is, since the mounting bracket 32d of the outer wall panel 3d is not provided with an extension portion, the inorganic outer wall surface material 3
A through hole 321d and a through hole 322d are provided in a portion attached to the back surface of 1d, and the mounting metal piece 32d is attached to the inorganic outer wall surface material 31d with a screw 6d screwed into the inorganic outer wall surface material 31d from the through hole 321d. The main difference of the mounting structure of the outer wall panel 3d is that the outer wall panel 3d is attached to the stud 2d by the through hole 21d of the stud 2d and the stepped rivet 5d inserted into the through hole 322d. It is a point.

Next, a detailed description will be given focusing on these different points. The outer wall panel 3d can be used as a molding die in
The water-containing molding material for molding described in Japanese Patent No. 45471 is placed in a molding die and cured to form an inorganic outer wall surface material 31.
The metal fitting 32d is attached to both side edges of the back surface of the inorganic outer wall surface material 31d with screws 6d.

The mounting bracket 32d used at this time is
It is a long plate-like body having a length substantially equal to the length of the inorganic outer wall surface material 31d, and has a plurality of through holes 321d for inserting the screws 6d and a plurality of through holes 322d for inserting the stepped rivets 5d. Then, as shown in FIG. 15, the two mounting brackets 32d are placed on both side edges of the back surface of the inorganic outer wall surface material 31d, the screws 6d penetrate through the through holes 321d, and are screwed into the inorganic outer wall surface material 31d. Then, the mounting bracket 32d is attached to the inorganic outer wall surface member 31d.

A recess 36d is provided on the back surface of the inorganic outer wall surface member 31d at a position facing the through hole 322d. This outer wall panel 3d is inserted into two adjacent studs 2d, and a through hole 21 provided in the stud 2d.
d and the through hole 322d of the mounting bracket 32d of the outer wall panel 3d
It is attached by a stepped rivet 5d screwed into the stud 2d.

The stepped rivet 5d used at this time is
Since it is almost the same as the fourth embodiment, the description thereof will be omitted. On the stud 2d of the building unit 1d, the step 5 of the stepped rivet 5d
A through hole 21d larger than the diameter of 6d is provided. or,
The mounting bracket 32d has a stepped portion 56d of the stepped rivet 5d.
A through hole 322d having a diameter smaller than the diameter is provided.

Next, a method of constructing this unit building will be described. The building unit 1d is manufactured at the factory. At this time, in the place where the outer wall is provided, the studs 2d are attached to the floor beam and the ceiling beam.
The outer wall panel 3d and the inner wall panel are attached to the stud 2d, and a heat insulating material is attached between the outer wall panel 3d and the inner wall panel to form an outer wall.

A method of attaching the outer wall panel 3d at this time will be described. First, the water-containing molding material for molding described in Japanese Patent Publication No. 4-45471 is put into a molding die and cured to form an inorganic outer wall surface material 31d having a lattice pattern on the surface.
To manufacture. Also, the mounting bracket 32d is manufactured. On this occasion,
The mounting bracket 32d has a through hole 321d and a through hole 322d.
The diameter of the through hole 321d is smaller than the diameter of the head of the screw 6d, and the diameter of the through hole 322d is equal to the stepped rivet 5d.
It is smaller than the diameter of the flange portion 54d and larger than the step portion 56d.

Then, a butyl caulking material 37d is applied to the side edge portion of the back surface of the inorganic outer wall surface material 31d, and on this,
The mounting bracket 32d is placed with the through hole 322d and the recess 36d aligned, and the screw 6d is placed in the through hole 3 of the mounting bracket 32d.
The mounting metal piece 32d is attached to the inorganic outer wall surface material 31d by screwing into the inorganic outer wall surface material 31d through 21d. In this way, by mounting the fittings 32d on both side edges of the inorganic outer wall surface material 31d, the outer wall panel 3d is completed.

Next, a polyethylene foam sheet 29d is attached to the outdoor surface of the stud 2d, and the two adjacent studs 2 are attached.
The outer wall panel 3d is pressed against d, and the through hole 21d provided in the stud 2d is aligned with the through hole 322d of the mounting plate 32d of the outer wall panel 3d. Next, the expandable portion 55d of the stepped rivet 5d is provided with the through hole 21d provided in the stud 2d and the through hole 3 provided in the mounting bracket 32d from the indoor side.
22d, and is inserted into the recess 34d.

Then, the diameter of the stepped portion 56d is equal to that of the fitting 32d.
Is larger than the through hole 322d provided in the step portion 56.
Since the height of c is substantially equal to or slightly larger than the thickness of the stud 2d, the step portion 56d cannot enter the through hole 322d of the attachment fitting 32d, and the step portion 56d abuts the attachment fitting 32d, and at the same time, the flange portion 54d abuts on the fitting 32d. Therefore, a gap is formed between the flange 54d and the fitting 32d, which is approximately equal to or slightly larger than the height of the step 56d, that is, the thickness of the stud 2d, and the stud 2d is sandwiched in this gap. become.

Then, when the shaft 58d is strongly pulled, the pulling piece 57d is pulled, the expandable portion opens and the expansion deformable portion 59c is formed while the cracks of the expandable portion are broken, and the flange portion 54c and the expansion deformable portion 59c are attached. Metal fitting 32c and stud 2
Insert c. In this way, the outer wall panel 3d is attached to the stud 2d. Finally, the building unit is completed by inserting the rubber gasket 39d between the outer wall panel 3d and the adjacent outer wall panel 3d or performing other finishing.

In the building unit to which the outer wall panel 3d is attached in this way, the stud 2d, the flange 54d of the stepped rivet 5d on one side, and the mounting metal fitting 32d on the other side, the inorganic outer wall material In order not to move in the direction perpendicular to the surface of 31d, and the stud 2d that is between the flange portion 54d of the stepped rivet 5d and the fitting 32d is not pinched, the step of the stepped rivet 5d is not clamped. It is movably attached by the difference between the diameter of the portion 56d and the diameter of the through hole 21d of the stud 2d.

Finally, a building unit is completed by inserting a gasket 59d made of synthetic rubber between the outer wall panel 3d and the adjacent outer wall panel 3d and performing other finishing.
We also manufacture roof panels. The building units and roof panels manufactured in this way are transported to a construction site, and at the construction site, nine building units 1d are installed in advance on the foundation provided to form the first floor. Nine building units 1d are installed on the building unit to construct the second floor, a roof panel is mounted on the building unit 1d, and other various finishings are performed to complete the unit building.

In the unit building completed in this way, the studs 2d and the inorganic outer wall material 31d expand and contract with changes in temperature and humidity, and stress is applied to the inorganic outer wall material due to the difference between the expansion and contraction of the two. Occurs, but at this time, the mounting bracket 32 attached to the inorganic outer wall surface material 31d
d is the stud 3d, the diameter of the stepped portion 56d of the stepped rivet 5d, and the through hole 2 of the stud 2d in the surface direction of the inorganic outer wall surface material 31d.
Since it is attached so that it can move by the difference in diameter of 1d,
The inorganic outer wall surface material 31d moves in the surface direction to relieve the stress, and the inorganic outer wall surface material 31d is not warped or cracked.

[0159]

As described in detail above, in the invention according to claim 1, the outer wall panel is composed of an inorganic outer wall material and a mounting metal fitting, and the inorganic outer wall material is attached to the building structure through the mounting metal fitting. Since the inorganic outer wall material is mounted so that it can move in the plane direction of the inorganic outer wall material, in the building with this outer wall panel mounting structure, the inorganic outer wall material and the building structure are Even if the inorganic outer wall material expands or contracts due to changes in the temperature, the inorganic outer wall material moves in the plane direction by the difference between the expansion and contraction of the inorganic outer wall material and the building structure, and the inorganic outer wall material is not distorted. No cracks or cracks occur on the outer wall material.

According to a second aspect of the invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped screw has a head, a screw part, and a step provided between the head part and the screw part. The stepped portion has a diameter smaller than the diameter of the head portion and larger than the diameter of the threaded portion, and the height thereof is substantially equal to or slightly larger than the thickness of the mounting metal fitting. A through hole having a diameter smaller than the diameter of the head of the stepped screw and larger than the diameter of the stepped portion is provided, and this mounting bracket is brought into contact with the back surface of the inorganic outer wall surface material, and the stepped screw is inserted from the through hole of the mounting bracket. The inorganic outer wall material is screwed into the inorganic outer wall material until the step reaches the inorganic outer wall material, the mounting bracket is mounted on the inorganic outer wall material, and the mounting bracket is mounted on the building structure. In a building with a mounting structure of It is firmly attached so that it does not move in a direction substantially perpendicular to the surface of the material, and the mounting bracket is installed in the direction of the surface of the inorganic outer wall surface material so that the diameter of the step of the stepped screw and the passage of the mounting bracket are It is mounted so that it can move only the difference from the holes, and even if the inorganic outer wall material and the building structure expand or contract due to changes in humidity or temperature, the inorganic outer wall material will not move between the inorganic outer wall material and the building structure. Due to the difference in expansion and contraction, the inorganic outer wall surface material is not distorted by moving in the surface direction, and the inorganic outer wall surface material is not cracked or cracked.

According to a third aspect of the invention, the outer wall panel is composed of an inorganic outer wall material and a mounting member, and the stepped screw has a head portion, a screw portion, and a step provided between the head portion and the screw portion. The stepped portion has a diameter smaller than the diameter of the head portion and larger than the diameter of the threaded portion, and the height thereof is substantially equal to or slightly larger than the thickness of the mounting metal fitting. A laterally extended part is provided, and a through hole whose diameter is smaller than the diameter of the head of the stepped screw and larger than the diameter of the step is provided in this extended part. The rear surface is attached with the extension portion protruding from the side edge portion of the inorganic outer wall material, the extension portion of this mounting bracket is abutted against the building structure, and the stepped screw is passed through the through hole of the extension portion to construct the building structure. The mounting bracket is screwed into the body until the step reaches the building structure. Since it is attached to the structure, in the building with this outer wall panel mounting structure, the mounting bracket is firmly attached to the building structure so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall material. However, it is mounted so that it can move in the direction of the surface of the inorganic outer wall material by the difference between the diameter of the step of the stepped screw and the through hole of the mounting bracket, and as a result, the inorganic outer wall surface changes due to changes in humidity and temperature. Even if the material and the building structure expand or contract, the inorganic outer wall material moves in the plane direction by the difference between the expansion and contraction of the inorganic outer wall material and the building structure, causing distortion in the inorganic outer wall material. No warping or cracking occurs on the inorganic outer wall surface material.

Also, since the outer wall panel can be attached from the outdoor direction, even if it is difficult to attach the outer wall panel from the indoor side due to the heat insulating material or the inner wall panel on the indoor side of the outer wall panel, it is always possible to attach from the outdoor side. And there are no restrictions on the process of attaching the outer wall panel,
The outer wall panel can be replaced, which is extremely convenient.

According to a fourth aspect of the present invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped rivet comprises:
It consists of a flange part, an expandable part that is an expanded deformation part, and a step part provided between the flange part and the expandable part. The step part has a diameter smaller than that of the flange part and a diameter of the expandable part. It is larger and has a height substantially equal to or slightly larger than the thickness of the mounting bracket, and the mounting bracket is provided with an extension portion extending in the lateral direction, and the extension portion has a stepped rivet with a diameter. Through holes that are smaller than the diameter of the flange portion of the stepped rivet and that are larger than the diameter of the stepped portion of the stepped rivet are provided in the building structure. The metal fitting is attached to the back surface of the inorganic outer wall surface material, with the extension portion protruding from the side edge portion of the inorganic outer wall material, and the extension portion of the mounting metal fitting is brought into contact with the building structure to form the step of the stepped rivet. Part is inserted into the through hole of the extension part, With the stepped rivet sandwiching the building structure and the mounting bracket with the flange and the expandable deformation part that expands the expandable part, the mounting bracket is attached to the building structure, In the building with this outer wall panel mounting structure, the mounting bracket is firmly attached to the building structure so as not to move in a direction substantially perpendicular to the surface of the inorganic outer wall material, and the surface of the inorganic outer wall material is fixed. In the direction of, the rivet is attached so that it can move by the difference between the diameter of the step of the stepped rivet and the through hole of the extension, and as a result, the inorganic outer wall material and the building structure expand and contract due to changes in humidity and temperature. However, the inorganic outer wall surface material moves in the plane direction by the difference between the expansion and contraction of the inorganic outer wall material and the building structure, and the inorganic outer wall material is not distorted. No cracks occur.

Also, since the outer wall panel can be attached from the outdoor direction, even if it is difficult to attach the outer wall panel from the indoor side due to the heat insulating material or the inner wall panel on the indoor side of the outer wall panel, it is always possible to attach from the outdoor side. And there are no restrictions on the process of attaching the outer wall panel,
The outer wall panel can be replaced, which is extremely convenient.

According to a fifth aspect of the present invention, the outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped rivet comprises:
It consists of a flange part, an expandable part that is an expanded deformation part, and a step part provided between the flange part and the expandable part. The step part has a diameter smaller than that of the flange part and a diameter of the expandable part. A through hole whose diameter is smaller than that of the stepped rivet and is larger than that of the expandable portion. The building structure is provided with a through hole smaller than the diameter of the flange portion and larger than the diameter of the step portion, and a mounting metal fitting is attached to the back surface of the inorganic outer wall surface material. And the stepped portion of the stepped rivet is inserted into the through hole of the building structure and abutted against the mounting bracket, and the flange portion and the expandable deformable portion in which the expandable portion is expanded are constructed. Mounting with stepped rivets sandwiching the structure and mounting bracket Since the tool is attached to the building structure, in the building with this outer wall panel mounting structure, the mounting bracket is firmly attached to the building structure in a direction substantially perpendicular to the surface of the inorganic outer wall material so as not to move. However, in the direction of the surface of the inorganic outer wall material, it is attached so as to be movable by the difference between the diameter of the stepped portion of the stepped rivet and the through hole of the extension portion, and as a result, the inorganic outer wall surface is changed due to changes in humidity and temperature. Even if the material and the building structure expand or contract, the inorganic outer wall material moves in the plane direction by the difference between the expansion and contraction of the inorganic outer wall material and the building structure, causing distortion in the inorganic outer wall material. No cracks or cracks occur on the inorganic outer wall surface material.

[Brief description of drawings]

FIG. 1 shows an embodiment in which the present invention is applied to a unit building, and (a) is a perspective view showing the unit building, and (b) is a sectional view taken along the line AA of (a).

FIG. 2 is a partially cutaway perspective view showing a building unit.

FIG. 3A is a perspective view showing the outer wall panel with its front side facing up, and FIG. 3B is a perspective view showing the outer wall panel with its back side facing up.

FIG. 4 is a front view showing a stepped screw.

FIG. 5 is a perspective view showing a mounting member.

FIG. 6 is a perspective view of a rivet.

FIG. 7A is a front view showing the back surface of the outer wall panel used in the experiment, and FIG. 7B is a front view showing the stepped screw used in the experiment.

FIG. 8 shows another embodiment of the present invention, (a) a perspective view of the outer wall panel with the front surface facing upward, (b) a perspective view of the outer wall panel with the back surface facing upward, (C) is a sectional view taken along the line C-C of (a).

FIG. 9 is a cross-sectional view showing a state where an outer wall panel is attached to a stud.

FIG. 10 shows another embodiment of the present invention and is a cross-sectional view showing a state where an outer wall panel is attached to a stud.

FIG. 11 is a front view showing the back surface of the outer wall panel used in the experiment.

FIG. 12 shows still another embodiment of the present invention and is a cross-sectional view showing a state where an outer wall panel is attached to a stud.

FIG. 13 is a front view of a stepped rivet.

FIG. 14 is a front view showing the back surface of the outer wall panel used in the experiment.

FIG. 15 is a perspective view showing still another embodiment of the present invention, showing the outer wall panel with the back surface facing upward.

FIG. 16 is a cross-sectional view showing a state where an outer wall panel is attached to the stud.

[Explanation of symbols]

U unit building 1 building unit 2, 2a, 2b, 2c, 2d building structure (stud) 21, 21a, 21b, 21c, 21d through hole 3, 3a, 3b, 3c, 3d outer wall panel 31, 31a, 31b, 31c , 31d Inorganic outer wall material 32, 32a, 32b, 32c, 32d Mounting brackets 321, 321a, 321b, 321c, 321d
Through holes 322, 322a, 322b, 322c, 322d
Through holes 33a, 33b, 33c Extended portions 5a, 5b Stepped screws 51a, 51b Head portions 52a, 52b Screw portions 53a, 53b Stepped portions 5c, 5d Stepped rivets 54c, 54d Flange portions 55c, 55d Expandable portions 56c, 56d Steps 59c, 59d Expansion deforming parts 6, 6b, 6c Stepped screws 61, 61b, 61c Heads 62, 62b, 62c Screws 63, 63b, 63c Steps 6a, 6d Screws 7 Rivet

Continued front page    F term (reference) 2E002 EA01 FA02 FB05 HA03 HB02                       HB14 MA01 MA41                 2E110 AA27 AB04 AB22 BA12 BC03                       BC09 CC02 CC04 CC15 DA09                       DC12 GA33W GB11W

Claims (5)

[Claims] 1. The outer wall panel comprises an inorganic outer wall material and a mounting member, and the mounting member is provided with a through hole through which a fastening member penetrates. The part where the diameter is smaller than the through hole and the height is approximately equal to or slightly smaller than the thickness of the mounting bracket is a step part,
This inorganic outer wall material is attached to the building structure via the mounting bracket.
An outer wall panel mounting structure, characterized in that the outer wall material is mounted such that the outer wall material is movable in the surface direction of the outer wall material. 2. The outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped screw comprises a head portion, a screw portion, and a step portion provided between the head portion and the screw portion. The step is
The diameter is smaller than the diameter of the head part, larger than the diameter of the screw part, and the height is approximately equal to or slightly larger than the thickness of the mounting bracket, and the mounting bracket has a diameter of the head part of the stepped screw. A through hole smaller than the diameter of the step portion is provided, and this mounting bracket is brought into contact with the back surface of the inorganic outer wall surface material, and the stepped screw is passed through the through hole of the mounting bracket to the inorganic outer wall surface material, and the step portion is made of the inorganic material. A mounting structure for an outer wall panel, characterized in that the mounting bracket is screwed into the outer wall member, the mounting bracket is mounted on the inorganic outer wall member, and the mounting bracket is mounted on the building structure. 3. The outer wall panel comprises an inorganic outer wall material and a mounting member, and the stepped screw comprises a head portion, a screw portion, and a step portion provided between the head portion and the screw portion. The step is
The diameter is smaller than the diameter of the head portion, larger than the diameter of the screw portion, and the height is substantially equal to or slightly larger than the thickness of the mounting bracket, and the mounting bracket is provided with an extension part extending in the lateral direction. , The extension is provided with a through hole whose diameter is smaller than the diameter of the head of the stepped screw and larger than the diameter of the step. It is attached so that it projects from the side edge of the, and the extension part of this mounting bracket is brought into contact with the building structure, and the stepped screw is attached to the building structure through the through hole of the extension part, and the step part is attached to the building structure. A mounting structure for an outer wall panel, which is screwed until it reaches the mounting bracket and is mounted to a building structure. 4. The outer wall panel is composed of an inorganic outer wall material and a mounting member, and the stepped rivet is provided between the flange portion, the expandable portion serving as an expansion deformation portion, and between the flange portion and the expandable portion. The step portion has a diameter smaller than the diameter of the flange portion and larger than the diameter of the expandable portion, and the height is substantially equal to or slightly larger than the thickness of the mounting bracket,
The mounting bracket is provided with an extension part extending in the lateral direction, and the extension part is provided with a through hole having a diameter smaller than the diameter of the flange part of the stepped rivet and larger than the diameter of the step part.
The building structure is provided with a through hole whose diameter is smaller than the diameter of the stepped portion of the stepped rivet and larger than the expandable portion, the mounting metal fitting is on the back surface of the inorganic outer wall material, and the extension portion is on the inorganic outer wall material side. It was attached by projecting from the edge, the extended part of this mounting bracket was brought into contact with the building structure, and the stepped part of the stepped rivet was inserted into the through hole of the extended part and struck the building structure. In the state, the outer wall is characterized in that the mounting bracket is attached to the building structure with a stepped rivet that sandwiches the building structure and the mounting bracket with the flange and the expandable deformable part that expands the expandable part. Panel mounting structure. 5. The outer wall panel is composed of an inorganic outer wall material and a mounting member, and the stepped rivet is provided between the flange portion, an expandable portion serving as an expansion deformation portion, and between the flange portion and the expandable portion. The stepped portion has a diameter smaller than the diameter of the flange portion and larger than the diameter of the expandable portion, and a height approximately equal to or slightly larger than the thickness of the building structure. Is provided with a through hole whose diameter is smaller than the diameter of the step portion of the stepped rivet and larger than the diameter of the expandable portion, and the building structure is smaller than the diameter of the flange portion of the stepped rivet and larger than the diameter of the step portion. A through hole is provided, a mounting bracket is attached to the back surface of the inorganic outer wall material, the mounting bracket is abutted on the building structure, and the step portion of the stepped rivet is inserted into the through hole of the building structure. And place it against the mounting bracket. Mounting structure for outer wall panels, characterized in that the mounting bracket is attached to the building structure with a stepped rivet that sandwiches the building structure and the mounting bracket with the expansion part and the expansion deformable part that expands the expandable part. .