JP6410561B2 - shutter - Google Patents

Description

  The present invention relates to a shutter in which a shutter curtain wound around a winding shaft is supported on an upper part of an aluminum casing fixing member.

  As a shutter on which the shutter curtain wound around the winding shaft is supported on the upper part of the aluminum housing fixing member, for example, a winding shaft that rotatably supports a winding wheel around which the shutter curtain is wound. A window shutter is integrally attached to the upper ends of a pair of left and right aluminum window vertical frames attached to the window opening. It is known (see, for example, Patent Document 1).

  The mounting bracket is formed by bending a steel plate material. The bracket body is provided in a stacked manner along the inner side of the upper end of the window vertical frame, and above and below the outer edge of the bracket body. It is attached to the window vertical frame with a support piece that is provided and bent so as to be approximately 90 degrees outward with respect to the bracket main body and along the outdoor side of the window vertical frame.

Japanese Patent No. 3326515

  The shutter curtain and the take-up wheel around which the shutter curtain is wound are attached via the mounting bracket, and the window vertical frame that supports the large weight of the shutter curtain and the take-up wheel is made of aluminum, so it is exposed to flames due to fire or the like. It will melt easily. If the window vertical frame starts to melt and soften, the shutter curtain and the winding wheel may not be supported, and the shutter curtain and the winding wheel may hang down in a direction away from the building or the like and fall off. For this reason, it is desirable that the mounting bracket is directly fixed to the housing. However, the housing does not necessarily exist at the fixing position of the mounting bracket. When the housing does not exist, an auxiliary column or the like must be separately provided, and there is a problem that the construction is complicated.

Further, when the shutter curtain and the take-up wheel hang down, the members surrounding the shutter curtain and the take-up wheel also hang down to form a gap between the building and the like, and the flammable member inside the outer wall, for example, is exposed from the gap. There is a problem that there is a fear.
This invention is made | formed in view of this subject, The place made into the objective is providing the shutter which was easy to construct and excellent in fire prevention property.

To achieve this object, the shutter of the present invention includes a shutter box that houses a shutter curtain wound around a winding shaft, and is fixed to the housing at both ends in the axial direction of the winding shaft, and is expected along the prospective direction. A pair of aluminum housing fixing members having an intersecting wall portion that is located on the housing side from the wall portion and the prospective wall portion and intersects the prospective direction; and an attachment member that attaches the shutter box to the housing fixing member. And the mounting member includes a shutter box fixing portion to which the shutter box is fixed, a prospecting wall fixing portion to be fixed to the expecting wall portion, and an intersecting wall fixing portion to be fixed to the intersecting wall portion. Yes, and the precursor fixing member has a hollow portion, the attachment member is disposed outside the inner member arranged inside of the hollow portion and the hollow portion And the outer member has the shutter box fixing portion and is in contact with the expectation wall portion, and the inner member has the expectation wall fixing portion and the intersecting wall fixing portion. a shutter the outer member that sandwich the expected wall portion and said Rukoto fixed to the prospective wall fixing part.

  According to such a shutter, the mounting member for fixing the shutter box to the housing fixing member is fixed not only to the expected wall portion of the housing fixing member but also to the intersecting wall portion located on the housing side from the expected surface. Even if the aluminum housing fixing member is softened by being exposed to the above, it can be prevented that the shutter box hangs down in a direction away from the housing. In addition, since the mounting member is not fixed to the housing, there is little work on site, and it is not necessary to provide an auxiliary column or the like on the building side, so that the workability is excellent. For this reason, it is providing the shutter which was easy to construct and excellent in fireproofing property.

In addition , since the shutter box is fixed by the mounting member in which the inner member and the outer member are fixed with the prospective wall portion of the housing fixing member sandwiched therebetween, it is difficult for the flame to directly contact the portion of the housing fixing member where the mounting member is fixed. It is possible to suppress melting.

In such a shutter, it is preferable that a reinforcing member is fixed to the outer side of the hollow part together with the crossing wall fixing part of the inner member.
According to such a shutter, the intersecting wall portion is reinforced not only by the inner member but also by the reinforcing member, so that the dripping of the shutter box can be further suppressed.

In such a shutter, it is desirable that the inner member has a facing portion that faces the upper end edge of the hollow portion in the vertical direction.
According to such a shutter, since the inner member to which the shutter box is attached via the outer member has the upper end edge of the pair of hollow portions and the opposing portion in the vertical direction, the attachment member and the housing are fixed. Even if the fixing portion with the member is damaged, the shutter box can be supported by placing the facing portion on the upper edge of the hollow portion.

  In such a shutter, a lower member that is located under the shutter box and connects between the pair of housing fixing members, an upper member that connects between upper ends of the housing fixing members, and the pair of housing fixing members, A back plate that covers an opening surrounded by the lower member and the upper member, and the reinforcing member has a protruding portion that protrudes toward the center between the pair of housing fixing members from the intersecting wall portion. The back plate is preferably fixed to the protrusion.

  According to such a shutter, the back plate that covers the opening surrounded by the pair of housing fixing members, the lower member, and the upper member is the reinforcing member that is fixed to the intersecting wall portion together with the inner member of the pair of housing fixing members. Since it fixes to the protrusion part which protrudes in the center side, it can fix integrally with a shutter box, a housing fixing member, etc. previously by a factory etc. For this reason, since it is not necessary to attach a backplate in the field, construction is easy. In addition, since the back plate is attached in advance, it is possible to prevent the attachment from being forgotten on site.

In this shutter, it is preferable that the mounting member is made of iron or a metal having a fire resistance higher than that of aluminum.
According to such a shutter, since the mounting member is made of iron or a metal that is more excellent in fire resistance than aluminum, a shutter that is more excellent in fire resistance can be provided.

  According to the present invention, it is possible to provide a shutter that is easy to construct and excellent in fire resistance.

It is a longitudinal cross-sectional view of the shutter which concerns on this embodiment. It is a perspective view which shows the structure of the shutter which concerns on this embodiment. It is a perspective view which shows the structure of an attachment member. It is a cross-sectional view of the right portion of the shutter according to the present embodiment. It is a transverse cross section showing the 1st modification of an attachment member. It is a cross-sectional view which shows the 2nd modification of an attachment member.

Hereinafter, a shutter according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the shutter 1 of this embodiment is attached to a housing 5 of a building.

  As shown in FIG. 2, the shutter 1 of the present embodiment includes an aluminum shutter frame 10, a shutter box 20 accommodated in the upper part of the shutter frame 10, and an outdoor side of the shutter box 20 accommodated in the shutter frame 10. A side cap 25 that covers the side portion of the part that protrudes into the shutter frame, a body cover 28 that covers the outdoor side of the shutter box 20 accommodated in the shutter frame 10 and is fixed to the side cap 25, and a shutter vertical frame 11 that the shutter frame 10 has. And a guide rail 27 that guides the shutter curtain 21 that is fixed below the shutter box 20 and moves up and down.

  In the following description, when the state in which the shutter 1 is attached to a building or the like is viewed from outside the room, the vertical direction is the vertical direction, the horizontal direction is the horizontal direction, and the depth direction is the indoor / outdoor direction. Shown as direction. Even if each part of the shutter 1 and each member constituting the shutter 1 are in a single state, the shutter 1 is attached in a direction such as a vertical direction, a horizontal direction, a prospective direction, or the like. The direction is specified and explained.

  The shutter box 20 includes a shutter curtain 21 formed of a plurality of slats made of iron partitioning the inside and outside of the room, a winding shaft 22 (FIG. 1) around which the shutter curtain 21 is wound, and a winding shaft 22 that is rotatable. And a case 23 for supporting and accommodating. At this time, the axial direction of the winding shaft 22 is arranged along the left-right direction.

  An upper fixing piece fixed to both ends of the case 23 positioned on the shutter curtain 21 accommodated in the case 23 in contact with an upper mounting portion 35d and a lower mounting portion 35e of the mounting member 30 described later. 23a and a lower fixing piece 23b (FIG. 1) are provided.

  The shutter frame 10 includes a pair of left and right shutter vertical frames 11 as a housing fixing member, a shutter upper frame 12 as a lower member that is spanned between the pair of shutter vertical frames 11 and is positioned below the shutter box 20, and a pair of shutter frames 10 A shutter lower frame 13 spanned between the shutter vertical frames 11, a roof plate 14 as an upper member spanned between the upper ends of the pair of shutter vertical frames 11, and left and right for fixing the shutter box 20 to the shutter vertical frame 11. A pair of mounting members 30, a left and right shutter vertical frame 11, a shutter upper frame 12, a closing plate 15 as a back plate for closing the indoor opening 10 a in the space formed by the roof plate 14, And an iron backing plate 16 as a reinforcing member for fixing to the shutter vertical frame 11.

  The roof plate 14, the shutter upper frame 12, and the shutter lower frame 13 are disposed between a pair of shutter vertical frames 11 and are fixed by screws that enter inwardly facing each other from the outside of each shutter vertical frame 11. .

  The pair of shutter vertical frame 11, shutter upper frame 12, shutter lower frame 13, and roof plate 14 are aluminum extrusion-molded members, and the attachment member 30 and the closing plate 15 are a metal having a melting point higher than aluminum and are incombustible. For example, it is made of iron. In the following description, the space side surrounded by the pair of shutter vertical frames 11, the shutter lower frame 13, and the roof plate 14 will be described as the inner peripheral side, and the opposite side will be described as the outer peripheral side.

  Each of the pair of shutter vertical frame 11, shutter lower frame 13, and roof plate 14 has fin portions 11 a, 13 a, and 14 a that protrude from the outer peripheral side of the shutter frame 10 and face the casing 5 at the indoor edge. The fins 11a, 13a, and 14a are fixed to the housing 5 with screws that penetrate in the expected direction. Further, the shutter upper frame 12 is provided with an upper frame extending piece 12a extending to the space S side above the shutter upper frame 12 on the indoor side, and the roof plate 14 has an upper side of the shutter upper frame 12 on the indoor side. A roof extension piece (not shown) extending toward the space S is provided.

  The left and right shutter vertical frames 11 and the attachment members 30 provided on the shutter vertical frames 11 have symmetrical shapes in which left and right are reversed. Therefore, the shutter vertical frame 11 and the attachment member 30 will be described by taking the right shutter vertical frame 11 side as an example, and the description on the left shutter vertical frame 11 side will be omitted.

  As shown in FIGS. 3 and 4, the right shutter vertical frame 11 is provided with an inner prospective wall portion 111 and an outer prospective wall portion that have prospective surfaces 111 a and 112 a that face each other in the left-right direction with a space therebetween and extend in the prospective direction. 112, the outdoor connecting portion 113 and the indoor connecting portion 114 that connect the outside edges of the inner prospective wall portion 111 and the outer prospective wall portion 112 and the indoor side edges, respectively, and the outer prospective wall portion 112 on the indoor side. The above-described fin portion 11a that protrudes from the slightly extended edge to the outer peripheral side and faces the housing 5 and the outer appearance wall portion 112 protrudes from the edge extended to the outdoor side to the inner peripheral side, and the guide rail 27 is provided at the tip. The engaging piece 112a is engaged, and the outdoor connecting portion 113 is extended to the inner peripheral side and is provided at the tip thereof, and has a rail fixing portion 113a to which the guide rail 27 is fixed. And the space enclosed by the inner prospective wall part 111, the outer prospective wall part 112, the outdoor connection part 113, and the indoor connection part 114 comprises the hollow part 11b penetrated along an up-down direction. Here, the inner prospective wall portion 111, the outer prospective wall portion 112, the outdoor connecting portion 113, and the indoor connecting portion 114 that form the hollow portion 11b are substantially orthogonal and have a rectangular shape whose cross-sectional shape is long in the prospective direction. The connecting portion 113 and the indoor connecting portion 114 correspond to an intersecting wall portion having an intersecting surface 114a that intersects the prospective surface 111a.

  The attachment member 30 includes an inner member 31 disposed inside the hollow portion 11b of the shutter vertical frame 11, and an outer member 35 provided outside the hollow portion 11b.

  The inner member 31 includes a prospective facing portion 31a, an outdoor facing portion 31b, and an indoor facing portion 31c that face the inner prospective wall portion 111, the outdoor connecting portion 113, and the inner surface of the indoor connecting portion 114 that form the hollow portion 11b. The horizontal cross-sectional shape is U-shaped with the outer peripheral side open. The upper edge of the prospective facing portion 31a is extended to the inner peripheral side to be provided with an upper edge extending portion 31d, and the shutter vertical frame 11 has a hollow when the inner member 31 is disposed in the hollow portion 11b. The upper edge 111b and the upper edge extending portion 31d of the inner prospective wall portion 111, which form a small edge of the portion 11b, are provided so as to face each other in the vertical direction.

  The prospective facing portion 31a is provided with a screw hole 31e for fixing the outer member 35 disposed via the inner prospective wall portion 111 with a screw V1, and the indoor facing portion 31c is provided with an indoor connecting portion 114. A screw hole 31f is provided for fixing the contact plate 16 disposed through the screw V2. Here, the prospective facing portion 31a corresponds to the prospective wall fixing portion, and the indoor facing portion 31c corresponds to the intersecting wall fixing portion.

  The external member 35 extends from the contact plate portion 35a in contact with the inner expected wall portion 111 of the shutter vertical frame 11 and the upper and lower edges of the contact plate portion 35a to the inner peripheral side of the shutter frame 10 respectively. It has the upper extension part 35b and the lower extension part 35c which form a horizontal surface. Further, an upper attachment portion 35d is provided on the outer edge of the upper extension portion 35b so as to be fixed to the upper fixing piece 23a which is extended upward and which the case 23 of the shutter box 20 has. A lower mounting portion 35e is provided at the outer edge of the extending portion 35c so as to be fixed to the lower fixing piece 23b, which extends downward and which the case 23 of the shutter box 20 has. Here, the upper mounting portion 35d and the lower mounting portion 35e correspond to the shutter box fixing portion.

  The contact plate 16 has a flat plate shape and is surrounded by the pair of shutter vertical frames 11, the shutter upper frame 12, and the roof plate 14 of the shutter frame 10 while being attached to the indoor connecting portion 114 of the shutter vertical frame 11. It is formed so as to protrude to the inner peripheral side of the space S. A screw hole 16b for fixing the closing plate 15 with a screw V3 is provided in the contact plate protrusion 16a protruding from the indoor connection portion 114 of the contact plate 16.

  The abutting plate 16 is formed so as to be flush with the upper frame extending piece 12a and the roof extending piece provided on the shutter upper frame 12 and the roof plate 14 when attached. A closing plate 15 is attached from the outdoor side so as to close the indoor side opening 10a formed by the frame extending piece 12a and the roof extending piece.

  In the shutter frame 10 of the present embodiment, first, the left and right attachment members 30 are fixed to the left and right shutter vertical frames 11, respectively. At this time, the indoor facing portion 31c of the inner member 31 is brought into contact with the inner surface of the indoor connecting portion 114, and the prospective facing portion 31a is brought into contact with the inner surface of the inner prospecting wall portion 111 so that the inner member 31 is disposed in the hollow portion 11b. To do. Then, the abutting plate portion 35a is brought into contact with the inner prospective wall portion 111 from the inner peripheral side of the shutter frame 10, and the screw V1 penetrating the inner prospective wall portion 111 and the abutting plate portion 35a is opposed to the inner member 31. The outer member 35 is fixed by screwing into a screw hole 31e provided in the portion 31a.

  Next, the shutter upper frame 12, the shutter lower frame 13, and the roof plate 14 are respectively bridged between the left and right shutter vertical frames 11 to which the mounting members 30 are fixed, and enter the inner peripheral side from the outer peripheral side of the shutter vertical frame 11. Join with screws. At this time, the upper edge of the upper frame extension piece 12a of the shutter upper frame 12 and the lower edge of the roof extension piece of the roof plate 14 face each other vertically.

  Next, a screw V2 that abuts the contact plate 16 from the indoor side of the shutter frame 10 to the indoor connection portion 114 of the shutter vertical frame 11 and penetrates the contact plate 16 and the indoor connection portion 114 is connected to the indoor facing portion of the inner member 31. The contact plate 16 is fixed by screwing into a screw hole 31f provided in 31c. In a state in which the contact plate 16 is attached, the left and right contact plates 16, the upper frame extending piece 12 a of the shutter upper frame 12, and the roof extending piece of the roof plate 14 are substantially in the same plane.

  Next, the closing plate 15 that closes the indoor side opening 10a formed by the left and right contact plates 16, the upper frame extending piece 12a of the shutter upper frame 12 and the roof extending piece of the roof plate 14 is closed from the outdoor side. A screw V3 penetrating the plate 15 is screwed into the screw hole 16b of the abutting plate 16 and attached.

  The closing plate 15 fixed to the contact plate 16 has, at its peripheral end, a boundary portion with the edges of the left and right contact plates 16, an upper frame extension piece 12a of the shutter upper frame 12, and a roof extension piece of the roof plate 14. A waterproof tape (not shown) is affixed over the entire area so as to straddle both at the boundary portion. The shutter frame 10 is unitized in a state where the waterproof tape is pasted, and is transported to the construction site.

  At the construction site, the unitized shutter frame 10 has left and right shutter vertical frames 11, shutter lower frames 13, and fin portions 11 a, 13 a and 14 a of the roof plate 14 fixed to the housing 5 with screws.

  Thereafter, the shutter box 20 is mounted on the upper side of the shutter upper frame 12 and screwed to the mounting member 30, and the side cap 25, the main body cover 28, and the left and right guide rails 27 are sequentially attached to complete the construction.

  According to the shutter 1 of the present embodiment, the iron attachment member 30 that fixes the shutter box 20 to the shutter vertical frame 11 is located not only on the inner expected wall portion 111 that forms the expected surface 111a but also on the housing 5 side from the expected surface 111a. Since it is also fixed to the indoor connecting portion 114 that forms the intersecting surface 114a, the shutter box 20 hangs down in the direction away from the housing 5 even if the aluminum shutter vertical frame 11 is softened by being exposed to a flame. This can be suppressed. At this time, in the case of a fire or the like where the fire source is the outdoor side, the indoor facing portion 31c fixed to the indoor connecting portion 114 of the mounting member 30 is on the side of the housing 5 from the internal prospective wall portion 111, that is, the internal prospective wall portion. Since it is fixed at a position farther from the flame than 111, it is possible to suppress the drooping of the shutter box 20 as compared with the case where it is fixed only to the inner prospective wall 111. Further, since the shutter box 20 is not fixed to the housing 5, the work at the site where the shutter 1 is attached is reduced, and it is not necessary to provide an auxiliary column or the like, so that the workability is excellent. For this reason, it is providing the shutter 1 which was easy to construct and excellent in fire resistance.

In addition, since the shutter box 20 is fixed by the mounting member 30 in which the iron inner member 31 and the outer member 35 are fixed with the inner expected wall portion 111 of the shutter vertical frame 11 sandwiched therebetween, the mounting member 30 in the shutter vertical frame 11 is fixed. It is possible to suppress the portion to be fixed from being melted by a flame or the like. Further, in the case of a fire where the fire source is the outdoor side, the inner member 31 of the attachment member 30 is fixed to the indoor connecting portion 114 with the indoor facing portion 31c coming into contact with the intersecting surface 114a from within the hollow portion 11b. And disposed between the flame and the indoor connecting portion 114. For this reason, since the indoor connection part 114 of the shutter vertical frame 11 is shielded from the flame by the indoor facing part 31c, it is difficult to melt. For this reason, it can suppress more that the shutter box 20 droops in the direction away from the housing 5.
Moreover, since the indoor connection part 114 is reinforced not only by the inner member 31 but also by the contact plate 16, the drooping of the shutter box 20 can be further suppressed.

  Further, since the inner member 31 to which the shutter box 20 is attached via the outer member 35 has the upper edge extending portion 31d that faces the upper end edge 111b of the hollow portion 11b in the vertical direction, Even if the portion fixing the shutter vertical frame 11 is damaged, the shutter box 20 can be supported by placing the upper edge extending portion 31d on the upper end edge 111b of the hollow portion 11b. Moreover, since the inner member 31 has the upper edge extension part 31d, when attaching the inner member 31 to the shutter vertical frame 11, the upper edge extension part 31d is hung on the upper end edge of the hollow part, The hand can be released from the material 31. For this reason, the inner member 31 can be easily fixed to the shutter vertical frame 11.

  The closing plate 15 that covers the indoor opening 10a surrounded by the pair of shutter vertical frame 11, shutter upper frame 12, and roof plate 14 on the housing 5 side is fixed to the indoor connecting portion 114 together with the inner member 31. Since the plate 16 is fixed to the contact plate protruding portion 16a that protrudes toward the center between the pair of shutter vertical frames 11, the unit is fixed in advance to the shutter box 20 and the shutter vertical frame 11 etc. in advance by a factory or the like. I can leave. For this reason, since it is not necessary to attach the obstruction | occlusion board 15 in the field, construction is easy. Moreover, since it attaches beforehand, it can prevent forgetting attachment of the patch plate 16 in the field.

  In the above embodiment, when the inner member 31 is disposed in the hollow portion 11b, the upper edge extending portion 31d is provided so as to face the upper end edge 111b of the inner prospective wall portion 111 in the vertical direction. However, the upper edge extension portion 31d is not necessarily provided.

  Moreover, in the said embodiment, although the attachment member 30 demonstrated the example provided with the inner member 31 and the outer member 35, the attachment member 30 contact | abuts to the internal prospective wall part 111, as shown in FIG. The abutting plate portion 35a to be fixed, the indoor abutting portion 35f to be abutted and fixed to the indoor side of the indoor connecting portion 114, the upper mounting portion 35d and the lower mounting portion 35e to which the shutter box 20 is attached. If it is provided, it may be composed of only one member corresponding to the outer member.

Further, when the shutter vertical frame 110 does not have a hollow portion, as shown in FIG. 6, the chamber from the portion where the contact plate portion 50 a of the mounting member 50 is fixed in the expected wall portion 110 a of the shutter vertical frame 110. On the inner side, a protrusion 110b that protrudes inwardly and inwardly is provided in the shutter vertical frame 110, and a protrusion 110b that forms an intersecting surface 110c with an abutment plate 50a on which the mounting member 50 is fixed to the prospective wall 110a. If it is provided with the indoor facing part 50b fixed to the upper part 50c and the upper attachment part 50c and the lower attachment part 50d to which the shutter box 20 is attached, it may be constituted by only one member corresponding to the outer member.
In the above-described embodiment, an example in which each member is fixed or joined with a screw has been described.

  In the said embodiment, although the attachment members 30 and 50 were made from iron, it is not restricted to this, What is necessary is just to be formed with the member excellent in fire resistance than aluminum.

  Moreover, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1 shutter, 5 housing, 10 shutter frame, 10a indoor side opening,
11 Shutter vertical frame, 11b Hollow part, 12 Upper frame, 14 Roof plate,
15 obstruction plate, 16 contact plate, 16a contact plate protrusion, 20 shutter box,
21 shutter curtain, 22 winding shaft, 30 mounting member, 31 inner member,
31d Upper edge extension part, 35 External material, 50 Mounting member, 50a Contact plate part,
110 Shutter vertical frame, 110a Expected wall part, 110b Projection part,
111 interior view wall, 111b upper edge, 114 indoor connection

Claims (5)

A shutter box that houses a shutter curtain wound around a winding shaft;
A pair of aluminum that is fixed to the housing at both ends in the axial direction of the winding shaft, and includes a prospective wall portion that extends along the prospective direction and an intersecting wall portion that is located on the housing side from the prospective wall portion and intersects the prospective direction. A housing fixing member of
An attachment member for attaching the shutter box to the housing fixing member;
Have
The mounting member includes a shutter box fixing portion to which the shutter box is fixed, a prospect wall fixing portion to be fixed to the expectation wall portion, and an intersection wall fixing portion to be fixed to the intersection wall portion,
I have a,
The housing fixing member has a hollow portion,
The mounting member has an inner member disposed inside the hollow portion and an outer member disposed outside the hollow portion,
The outer member has the shutter box fixing part and is in contact with the expected wall part,
Said member, said the expected wall fixing part and a said cross wall fixing part, a shutter in which the outer member that sandwich the expected wall portion and said Rukoto fixed to the prospective wall fixing portion . The shutter according to claim 1 ,
The shutter is characterized in that a reinforcing member is fixed to the outer side of the hollow portion together with the cross wall fixing portion of the inner member on the intersecting wall portion. The shutter according to claim 1 or 2 ,
The shutter, wherein the inner member has a facing portion that faces the upper end edge of the hollow portion in the vertical direction. The shutter according to claim 2 ,
A lower member that is located under the shutter box and connects the pair of housing fixing members;
An upper member connecting the upper end portions of the housing fixing member;
A back plate that covers the opening surrounded by the pair of housing fixing members, the lower member, and the upper member;
The reinforcing member has a protruding portion that protrudes from the intersecting wall portion to the center side between the pair of housing fixing members,
The shutter, wherein the back plate is fixed to the protrusion. The shutter according to any one of claims 1 to 4 ,
The shutter is characterized in that the mounting member is made of iron or a metal superior in fire resistance to aluminum.

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