JP7207351B2 - Horizontal wall material mounting bracket, horizontal wall material mounting structure, building structure with horizontal wall material mounting structure - Google Patents

Description

The present invention relates to a horizontal exterior wall material mounting bracket for a building structure, a horizontal exterior wall material mounting structure using the horizontal exterior wall material mounting bracket, and a building structure having the horizontal exterior wall material mounting structure.

Non-bearing walls of building structures include ALC, extruded cement board (hereinafter referred to as ECP), etc., which are joined to the wall base material via mounting brackets arranged at the ends in the longitudinal direction. In general, those fixed in the vertical direction are called vertical stretches, and those fixed in the horizontal direction are called horizontal stretches.

The most common mounting hardware is the Z-shaped hardware (so-called Z-clip) shown in the table on page 58 of Non-Patent Document 1. FIG. 6 and FIG. 7 show a mounting structure of the horizontal exterior wall material 15 using such a Z-shaped hardware 13. As shown in FIG. A wall base material 19 having a flange portion 19a and a web portion 19b is attached to the steel pipe column 17 via a bracket 21, and the lateral wall material 15 is attached to the wall base material 19 via a Z-shaped metal fitting 13. ing.
One flat plate portion 13a of the Z-shaped metal fitting 13 is formed with a long hole 13b extending in the length direction (long side direction of the metal fitting, perpendicular to the bending line) serving as a bolt hole for fixing the exterior wall material. Two Z-shaped metal fittings 13 are attached to each of the short sides of the horizontal outer wall material 15. In the horizontal stretching construction method, the Z-shaped metal fittings 13 are attached to the other side as shown in Fig. 4-16 on page 33 of Non-Patent Document 1. The flat plate portion 13c is fixed by welding to the flange portion 19a of the wall base material 19, and is constructed so as to follow the interlayer deformation during an earthquake by sliding the bolt 23 in the long hole portion (FIGS. 6 and 6). 7).

Further, Patent Document 1 proposes a mounting bracket used for vertically extending an ECP, which is composed of a Z hardware, a C-shaped steel, and a weight bearing plate.
In this mounting bracket, the Z metal fitting is fixed in advance to the lower end of the ECP, the weight of the ECP is borne by the weight receiving plate placed on the frame side, and the Z metal fitting is attached to the C-shaped steel fixed to the weight receiving plate. It is to fit.

The Z metal fittings of Patent Document 1 are provided with two bolt holes, one of which is a round hole and the other is an elongated hole, in order to more reliably fix it to the exterior wall material, and the extension direction of the elongated hole is Unlike the Z-shaped metal fittings, it is in the width direction of the metal fittings. The reason why one of the bolt holes is elongated is because the ECP gap interval (partition wall interval) varies depending on the manufacturer and product dimensions. This is to avoid interference with the inner partition wall.

The one disclosed in Patent Document 1 is used for the vertical tension construction method of ECP, but in order to fix the metal fittings with two bolts, instead of the so-called locking construction method, the C-shaped steel and Z metal fittings are bent into a Z-shaped bending line. It slides in the direction of the line length to absorb inter-layer deformation. In addition, since the C-shaped steel cannot bear the weight, a weight bearing plate is provided at the bottom of the ECP to bear its own weight.

Extruded Cement Board Association (ECP Association) ECP Construction Standard Specifications 2015 Edition (5th Edition)

JP 2004-308259 A

ECP is known to shrink when heated in the event of a fire. It is also known that cement, which is the main component of ECP, is thermally decomposed and its strength is reduced.
Considering heat shrinkage in the event of a fire, in the installation method shown in Non-Patent Document 1, the horizontal shrinkage in the installed state of the ECP absorbs the stress by the bolt sliding in the long hole provided in the hardware. However, since vertical contraction cannot be absorbed, stress is generated in the vertical direction of the ECP.

The wall base material 19 is generally an angle steel material, and when the temperature rises, it expands due to thermal expansion. Since the Z-shaped hardware 13 is welded and fixed to the wall base material 19, the arrangement interval of the hardware expands more than at room temperature, and the ECP tends to contract, so the ECP whose strength has been reduced by heating becomes large. will be damaged. When the working width of ECP increases, the absolute amount of contraction increases, so it becomes more conspicuous.

In addition, as described above, the construction method of Patent Document 1 is for vertical installation, in which the Z hardware is fixed in advance to the lower end side of the ECP, and the weight of the ECP is borne by the weight receiving plate arranged on the frame side, and the above-mentioned The Z hardware is fitted to the C-shaped steel fixed to the weight receiving plate.
In [0026] of the same document, it is described that the upper part is bolted from the front side. Furthermore, it is also stated that this bolting does not carry the load of the ECP and is sufficient to prevent the Z hardware from coming off the C-section steel, and that it does not need to be rigidly fixed.
However, since FIGS. 1(a) and 1(b) of the document do not show the lower panel upper mounting structure, the details of the upper mounting method are unknown.
In addition, there is no concept of absorbing the displacement between the ECP, which is the outer wall material, and the Z metal fittings. Regarding the damage to the ECP due to the above-mentioned heat shrinkage, the structure of the upper part is not specifically shown, so the stress relaxation mechanism is unknown. be.

Since the object of the present invention is the horizontal construction method, a method of applying the mounting bracket of Patent Document 1, which is for the vertical construction method, to the horizontal construction method was studied.
When simply rotated 90 degrees, it is not effective to place the weight bearing plate on the wall base material that extends in the vertical direction.
In this case, since there is no part that bears the vertical load, it is necessary to fix the Z hardware to the C-beam by welding or mechanical means. In this case, the shape of the bolt holes does not allow the ECP to follow the interlaminar deformation, so the ECP will be severely damaged during an earthquake, which is not suitable.

Next, considering the case where a separate weight bearing plate is provided to bear its own weight and the Z hardware can be slid in the horizontal direction, the number of parts increases compared to the conventional method, and there is no advantage. When the C-shaped steel is omitted and one side of the Z metal fitting of Patent Document 1 is welded to the weight bearing plate in the same manner as the conventional Z-shaped metal fitting 13, one of the bolt holes in the Z metal fitting is vertically oriented. Although the holes are elongated, the other is a round hole and cannot slide in the bolt hole portion.

Further, the inventors considered making the elongated hole 13b of the conventional Z-shaped metal fitting 13 in the same direction as the elongated hole of Patent Document 1. According to this, vertical shrinkage can be absorbed in the event of a fire. However, when Z hardware is welded, it becomes impossible to follow interlayer deformation. If welding is omitted, the Z-shaped hardware 13 may open due to heat in the event of a fire, and the ECP may slip down.

The present invention was made in order to solve such problems, and it is possible to prevent the damage and slipping of the outer wall due to the contraction of the horizontal outer wall material in the event of a fire while ensuring the followability to the deformation between the layers during an earthquake. It is an object of the present invention to provide a building structure having a mounting bracket for a horizontal exterior wall material, a mounting structure for the horizontal exterior wall material, and a mounting structure for the horizontal exterior wall material.

(1) A mounting bracket for a horizontal exterior wall material according to the present invention is for attaching a horizontal exterior wall material to a wall base material extending in the vertical direction,
a base-side mounting member having a flat plate portion and a pair of rising pieces provided on both sides of the flat plate portion, and mounted to the wall base material so that the rising pieces are arranged vertically;
a first flat plate portion having a mounting hole formed by a longitudinally extending elongated hole in the mounted state and attached to the lateral wall material; It is characterized by comprising a wall material side mounting member having a second flat plate portion that can be inserted between a pair of rising pieces and having a substantially Z-shaped overall shape when viewed from the side.

(2) A mounting structure for a horizontal exterior wall material using the mounting bracket for a horizontal exterior wall material according to (1) above,
The base-side mounting member is fixed to the wall base material with the pair of rising pieces arranged vertically,
The wall material-side mounting member is mounted to the lateral wall material by a bolt inserted through the mounting hole of the first flat plate portion,
The second flat plate portion of the wall-side mounting member is slidably inserted between a pair of rising pieces of the base-side mounting member.

(3) A building structure according to the present invention is characterized by having the mounting structure of the horizontal exterior wall material according to (2) above.

A mounting bracket for a horizontal exterior wall material according to the present invention has a flat plate portion and a pair of rising pieces provided on both sides of the flat plate portion, and the wall base is arranged such that the rising pieces are arranged vertically. a base-side attachment member attached to the material, a first flat plate portion having an attachment hole consisting of an elongated hole extending in the vertical direction in the attached state and attached to the horizontal outer wall material, and the first flat plate portion via the bending piece portion. and a wall material side mounting member having a second flat plate portion which can be inserted between a pair of rising pieces of the base side mounting member and which has a substantially Z-shaped overall shape when viewed from the side. As a result, the structure can tolerate the displacement due to the contraction of the horizontal outer wall material in the event of a fire and the displacement in the event of an earthquake.

1 is a perspective view of a state in which a horizontal exterior wall material is attached by a horizontal exterior wall material mounting bracket according to an embodiment of the present invention; FIG. FIG. 2 is an explanatory diagram of a base-side mounting member that constitutes the mounting bracket for the horizontal exterior wall material shown in FIG. 1 ; FIG. 2 is an explanatory diagram of a wall material-side mounting member that constitutes the mounting bracket for the horizontal exterior wall material shown in FIG. 1 ; FIG. 4 is an explanatory diagram of a mounting method for mounting a horizontal exterior wall material to a wall base material using the horizontal exterior wall material mounting bracket according to the present embodiment; FIG. 4 is an explanatory diagram of a state of bolt position movement in the mounting structure of the horizontal exterior wall material according to the present embodiment at the time of fire; It is explanatory drawing of the conventional horizontal construction method. FIG. 7 is an explanatory diagram of the Z-shaped hardware used in the conventional horizontal tension construction method shown in FIG. 6 ;

As shown in FIG. 1, a mounting bracket 1 for a horizontal exterior wall material according to an embodiment of the present invention is for attaching a horizontal exterior wall material 15 to a wall base material 19 arranged so as to extend in the vertical direction. It is provided with a base-side mounting member 3 mounted on the wall base material 19 and a wall-side mounting member 5 mounted on the horizontal outer wall material 15. - 特許庁
Each configuration will be described in detail below.

<Horizontal wall material>
The lateral wall material 15 is, for example, extruded cement board (ECP). The ECP is a plate material in which a plurality of linear voids 15a are provided in parallel.
In the present embodiment, an ECP is assumed as the horizontal exterior wall material 15, and in the following description, the ECP is used in place of the word horizontal exterior wall material 15 in the description of the structure unique to the ECP.
ALC may be used as the horizontal outer wall material 15 in some cases.

<Wall backing material>
The wall base material 19 is a steel angle member having a substantially L-shaped cross section perpendicular to the axial direction. As shown in FIG. 6 , the wall base material 19 is arranged vertically on the steel pipe column 17 via the bracket 21 and serves as a supporting member for the lateral wall material 15 .
The wall base material 19 is not limited to an angle member as long as it has a flange portion 19a that contacts along the plate surface of the horizontal exterior wall material 15 to which it is attached. do.

<Mounting member on base side>
The base-side mounting member 3 is a member fixed to the wall base material 19, and as shown in FIG. It is a substantially C-shaped member.
As shown in FIG. 1, the base-side mounting member 3 is fixed to the wall base material 19 by welding or the like so that the pair of rising pieces 3b are horizontally oriented vertically.

The inner dimension d (see FIG. 2) between the pair of rising pieces 3b is set to be substantially the same as the width dimension of the second flat plate portion 5d of the wall material side mounting member 5, and the second flat plate portion 5d is separated from the pair of rising pieces. When inserted between the portions 3b, the two are fitted and slidable.
The height h of the rising piece 3b of the base side mounting member 3 is appropriately set according to the arrangement method of the base side mounting member 3, for example, the presence or absence of hard packing. It is preferable to set the height so that it is possible to prevent slippage and rotation and to guide the second flat plate portion 5d of the wall material side mounting member 5 when it slides.

Considering that the wall-side mounting member 5 may open due to heat in the event of a fire, it is desirable that the height h of the rising piece 3b be higher than the plate thickness of the wall-side mounting member 5. It is more desirable that the thickness is at least twice the plate thickness of the mounting member 5 . Furthermore, when a hard packing is interposed in this portion, it is more desirable to add the thickness of the packing to the height.

To give an example of the specific specifications of the base side mounting member 3, a steel plate with a thickness of 5 mm is formed by bending, and a flat plate portion 3a with a length of 50 mm is provided with rising pieces 3b with a height of 10 mm at both ends. be done. The inner dimension d of the pair of rising pieces 3b is 51 mm, which is substantially the same as the width w=50 mm of the second flat plate portion 5d of the wall material side mounting member 5 (see FIG. 3).

<Wall material side mounting member>
The wall material side mounting member 5 has a first flat plate portion 5b that is bolted to the lateral wall material 15 and has a mounting hole 5a that is an elongated hole that extends in the vertical direction in the mounted state. 5c and has a second flat plate portion 5d which is inserted between the pair of rising pieces 3b of the base side mounting member 3 and is slidable, and has a substantially Z-shaped overall shape when viewed from the side. be.
Here, the substantially Z-shape means a shape in which the first flat plate portion 5b and the second flat plate portion 5d extend in opposite directions with the bent piece portion 5c interposed therebetween for the sake of convenience. The angle formed by the first flat plate portion 5b and the second flat plate portion 5d and the bent piece portion 5c may be an obtuse angle, a right angle, or an acute angle. Alternatively, a radius (R) may be provided at a boundary portion (bent portion) between the first flat plate portion 5b and the second flat plate portion 5d and the bent piece portion 5c.

The wall-side mounting member 5 is formed by bending a steel plate, and the bending dimension b (see FIG. 3) depends on the thickness of the flange portion 19a of the wall base material 19 and the plate thickness of the base-side mounting member 3. It is set to the total dimension of t. If a hard packing (not shown) is interposed, the size of the packing should be taken into consideration.
The mounting hole 5a provided in the first flat plate portion 5b is an elongated hole extending in the short side direction of the wall material side mounting member 5, and becomes an elongated hole elongated in the vertical direction in the mounted state. The orientation of the elongated holes corresponds to that of the conventional elongated hole 13b rotated by 90 degrees.

To give an example of specific specifications of the wall material side mounting member 5, it is made of a bent steel plate with a thickness of 5 mm. Between 5b and the second flat plate portion 5d, there is a bent piece portion 5c formed by valley folds and mountain folds, and the length of the long side is 120 mm in plan view. The bending dimension b of the bent piece portion 5c is 10 mm, which is the sum of the 5 mm thickness of the wall base material 19 and the 5 mm thickness of the base side mounting member 3 .
The long holes formed in the first flat plate part are long holes each 10 mm long in the short side direction, that is, long holes having a center-to-center distance of 20 mm.

As shown in FIG. 1, in the installation structure 7 of the horizontal exterior wall material using the horizontal exterior wall material mounting bracket 1 as described above, the base-side installation member 3 is arranged in a state in which the pair of rising pieces 3b are vertically arranged. fixed to the wall base material 19,
The wall material side mounting member 5 is mounted to the lateral wall material 15 by bolts 9 inserted through the mounting holes 5a of the first flat plate portion 5b,
The second flat plate portion 5d of the wall-side mounting member 5 is slidably inserted between the pair of rising pieces 3b of the base-side mounting member 3. As shown in FIG.

An example of a method for constructing such a mounting structure 7 for horizontal exterior wall materials will be described.
As shown in FIG. 4, the flat plate portion 3a of the base-side mounting member 3 is in contact with the flange surface of the flange portion 19a of the wall base material 19 erected in the vertical direction, and the pair of rising pieces 3b are vertically aligned. fixed so that it is placed in The fixing method of the base-side mounting member 3 is to join the upper and lower sides of the flat plate portion 3a and the flange portion 19a by fillet welding. This welding does not necessarily have to extend over the entire length, but may be at least two locations of about 10 mm or more from both ends, or about 20 mm at the central portion.

The lateral wall material 15 is provided with a bolt hole 11 for fixing the wall material side mounting member 5 with a bolt. The bolt holes 11 are provided in the gaps 15a of the ECP as in the conventional example, but the gaps 15a in which the bolt holes 11 are drilled are the second from the upper and lower outermost parts of the ECP as a standard.
Further, the position of the bolt hole 11 is such that, in the mounted state, a space is provided between the tip of the second flat plate portion 5d of the wall material side mounting member 5 and the web portion 19b of the wall base material 19 in consideration of inter-layer deformation. Also between the bent piece portion 5c and the flange portion 19a of the wall base material 19, a space substantially equal to the above-mentioned space is maintained.
This is to enable the second flat plate portion 5d to slide horizontally with respect to the base-side attachment member 3. As shown in FIG.

A bolt 9 is inserted into the bolt hole 11, and the wall material side mounting member 5 is attached to the lateral wall material 15 with a plate nut (not shown) arranged in the space 15a. At this time, the bolt 9 is not completely tightened.
Next, by inserting the second flat plate portion 5d of the wall-side mounting member 5 between the rising pieces 3b of the base-side mounting member 3 and tightening the bolts 9 in this state, the horizontal wall material 15 is formed as a horizontal wall material. It is attached to the wall base material 19 via the mounting bracket 1 .

In the mounting structure 7 of the lateral wall material constructed in this way, the second flat plate portion 5d of the wall material side mounting member 5 can slide in the horizontal direction between the rising piece portions 3b of the base side mounting member 3, thereby preventing an earthquake. It can follow the inter-layer deformation of time. In addition, since the lower rising piece 3b bears the load of the horizontal outer wall material 15 and restrains the rotation of the second flat plate portion 5d with the upper and lower rising pieces 3b, the horizontal outer wall material 15 does not move in the event of a fire or an earthquake. It never slides down.

Furthermore, when the ECP shrinks during a fire, the deformation accompanying the horizontal contraction is absorbed by the horizontal sliding of the second flat plate portion 5d, and the deformation accompanying the vertical contraction is absorbed as shown in FIG. , the movement of the bolt 9 in the long hole portion enables absorption. As can be seen from the dashed line passing through the center of the bolt 9 in FIG. 5, FIG. 5(a) shows the state before contraction of the ECP, and FIG. In (b), the lower bolt 9 moves upward in the mounting hole 5a, and the upper bolt moves downward.

In this way, the deformation of the ECP during contraction during heating is not restrained, and stress does not act on the ECP, so that the ECP can be reliably prevented from being damaged.
Therefore, according to the horizontal exterior wall material mounting structure 7 of the present embodiment, it is possible to realize a horizontal external wall material mounting structure that is resistant to earthquakes and fires.

Furthermore, the building structure to which the horizontal exterior wall material 15 is attached by the mounting structure 7 of the horizontal exterior wall material of the present embodiment is prevented from being damaged by an earthquake or fire. It is a strong building structure.

1 Horizontal exterior wall material mounting bracket 3 Substrate side mounting member 3a Flat plate portion 3b Rising piece portion 5 Wall material side mounting member 5a Mounting hole 5b First flat plate portion 5c Bending piece portion 5d Second flat plate portion 7 Horizontal wall material mounting structure 9 Bolt 11 Bolt hole 13 Z-shaped hardware 13a One flat plate portion 13b Long hole 13c The other flat plate portion 15 Horizontal exterior wall material 15a Cavity portion 17 Steel pipe column 19 Wall base material 19a Flange portion 19b Web portion 21 Bracket 23 Bolt

Claims (3)

A mounting bracket for a horizontal exterior wall material for attaching a horizontal exterior wall material to a wall base material extending in the vertical direction,
A base-side mounting member having a flat plate portion and a pair of rising pieces provided on both sides of the flat plate portion, wherein the rising pieces are arranged vertically and the flat plate portions are fixed to the wall base material. When,
a first flat plate portion having a mounting hole formed by an elongated hole extending vertically in the mounted state and attached to the lateral wall material; A mounting bracket for lateral wall material, characterized by comprising a wall material side mounting member having a second flat plate portion that can be inserted between a pair of rising pieces and having a substantially Z-shaped overall shape when viewed from the side. . A mounting structure for a horizontal exterior wall material using the mounting bracket for a horizontal exterior wall material according to claim 1,
The flat plate portion of the base-side mounting member is fixed to the wall base material in a state in which a pair of rising pieces are arranged vertically,
The wall material-side mounting member is mounted to the lateral wall material by a bolt inserted through the mounting hole of the first flat plate portion,
1. A mounting structure for a horizontal exterior wall material, wherein said second flat plate portion of said wall material side mounting member is slidably inserted between a pair of rising pieces of said base side mounting member. A building structure comprising the mounting structure for the horizontal outer wall material according to claim 2 .

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