JP7132864B2 - Fireproof cover, fireproof device, wiring device installation structure and wiring device installation method - Google Patents

Description

The present invention relates to a fireproof cover for a wiring device installed in a through hole formed in a wall material, a fireproof device, a wiring device installation structure, and a wiring device installation method.

In general, when a wiring device such as an outlet or a switch is installed in the wall material of a building, a through hole is formed in the wall material, and the wiring device is arranged so as to face the wall surface through the wall material. Wiring is arranged in the space behind the wall. In addition, in order to prevent toxic gases, flames, smoke, etc. from flowing into or out of the space through the wall materials through the through holes in the event of a fire, it is necessary to take fireproof measures to close the through holes with refractory materials without gaps. becomes.

For example, Patent Literature 1 discloses a fireproof cover installed behind a wall so as to cover a through hole formed in the wall material. In the following paragraphs, the reference numerals of Patent Document 1 are shown in parentheses. Patent Document 1 discloses a fireproof wiring box ( 1) is disclosed. The fireproof cover (30) has a cover body (31) made of a metal material and formed in the shape of a bottomed square box having an opening (31a) on the front surface (one side). The cover body (31) has a housing space (33) surrounded by a bottom wall (32) and side walls (32a-32d) and capable of housing the wiring box (10). A square ring-shaped flange (41) is integrally formed around the entire periphery of the opening (31a) of the cover body (31). The flange (41) is formed so as to extend outward from the cover body (31) from the entire periphery of the opening (31a). To install the wiring box (10), first, the outer surface (321d) of the left side wall (32d) of the cover body (31) is brought into contact with the side surface of the pillar (H), and the left rear surface of the flange (41) is A fireproof wiring box (1) is placed so as to abut on the front face of the pillar (H). Subsequently, the fixing screw (B) is inserted through the insertion hole (16) of the wiring box (10) and the through hole (38) of the cover body (31), and the fixing screw (B) is forced onto the column (H). screw in. The fireproof wiring box (10) is then fixed to the pillar (H). Subsequently, the cable (C) is pulled into the wiring box (10) through the cable insertion hole (14). Then, the wall material (W1) is erected on the front side of the pillar (H). Thus, the installation structure of the fireproof wiring box (10) is formed. At this time, since the entire front surface of the flange (41) is in surface contact with the rear surface of the wall material (W1), flames, smoke, toxic gases, etc. that have flowed into the fireproof cover (30) are less likely to flow into the back of the wall W. It's becoming

JP 2012-239367 A

In the conventional installation method for wiring devices such as that disclosed in Patent Document 1, the fireproof cover can be installed behind the wall by erecting the wall material after being fixed to the stud (lightweight shaped steel material). Therefore, it has been difficult to newly install a fireproof cover in a building in which wall materials have already been erected. Moreover, in the fireproof cover of Patent Document 1, the through hole is closed by pressing the wall material against the flange when erecting the wall material. However, a slight deviation in construction tends to create a gap between the flange and the back surface of the wall. Poisonous gas, smoke, flames, etc. may flow in or out of the gap, so in order to ensure that the entire flange surface is pressed against the back surface of the wall, it is necessary to eliminate the positional deviation of the wall material and through-holes during construction. is essential, and in order to ensure accuracy in construction, close attention is required for construction work, and construction takes time and effort, which is also a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to install a wall material having a through hole, and to more reliably block the through hole. To provide a fireproof cover, a fireproof device, a wiring device installation structure, and a wiring device installation method.

In the fireproof cover according to claim 1, a wiring device fixture for fixing a wiring device through a through hole formed in a wall material is accommodated in the wall behind the wall, and the wall behind the wall is closed so as to block the through hole. A fireproof cover installed in
A cover body formed of a refractory material in the shape of a bottomed box having a bottom wall and side walls,
The cover body is
an opening that opens at a front surface facing the bottom wall; an accommodating portion for accommodating the wiring device fixture;
a contact portion extending along the outer periphery of the opening and contacting the back surface of the wall at the front surface;
and a clamped portion clamped together with the wall material by the wiring device and the wiring device fixture when the wiring device is fixed to the wiring device fixture.

According to a second aspect of the present invention, there is provided the fire resistant cover according to the first aspect, wherein the abutting portion comprises a sticking portion that sticks to the rear side of the wall.

According to claim 3, in the fireproof cover according to claim 1 or 2, the cover main body is formed so as to be compressively deformable so as to pass through the through hole.

A fireproof cover according to claim 4 is characterized in that, in the fireproof cover according to any one of claims 1 to 3, the cover main body is made of a thermally expandable elastic material.

The fireproof cover according to claim 5 is the fireproof cover according to claim 3 or 4, characterized in that the side wall of the cover body has a bellows shape in which peaks and valleys are alternately continuous. do.

The fireproof cover according to claim 6 is characterized in that, in the fireproof cover according to any one of claims 1 to 5, the bottom wall of the cover body is thicker than the side walls.

The fireproof cover according to claim 7 is the fireproof cover according to any one of claims 1 to 6, wherein the contact part and/or the pinched part has an opening into which the wiring device can be inserted. It is characterized by being made of a frame member made of a hard material.

The fireproof cover according to claim 8 is the fireproof cover according to any one of claims 1 to 7, further comprising a sound-absorbing filling member made of a foam material arranged in the cover body. Characterized by

The fire-resistant device according to claim 9 is a fire-resistant device that is installed behind the wall so as to block the through-hole while fixing the wiring device to the wall surface through the through-hole formed in the wall material. ,
A fireproof cover according to any one of claims 1 to 8;
and a wiring device fixture that includes a fixing portion for fixing the wiring device and is arranged from the wall surface to the wall rear side through the through hole.

The wiring device installation structure according to claim 10, wherein a wall material having a wall surface and a wall rear surface in which a through hole is formed;
a fireproof cover according to any one of claims 1 to 8 installed behind a wall;
a wiring device fixture that is housed in the housing portion of the fireproof cover and installed so that the fixing portion faces the wall surface via the through hole;
and a wiring device fixed to the wiring device fixture,
With the abutting portion of the front surface of the cover main body of the fireproof cover in contact with the peripheral edge of the through hole on the rear surface of the wall, the wiring device and the wiring device fixing device sandwich the sandwiched portion of the fireproof cover together with the wall material. It is characterized by

The method according to claim 11 is a method of installing a wiring device through a through hole formed in a wall material,
a step of disposing a fireproof cover having a cover body which is open to the front and is formed in the shape of a bottomed box made of a fireproof material and has a bottom wall and side walls from the wall surface to the wall rear surface through the through hole;
a step of housing a wiring device fixture for fixing the wiring device in a housing portion of the cover body;
With the abutting portion surrounding the opening of the front surface of the cover main body in contact with the periphery of the through hole on the rear surface of the wall, the part to be held of the cover main body is held together with the wall material by the wiring device and the wiring device fixing device. and fixing the wiring device to the wiring device fixture so as to sandwich the wiring device.

According to the fireproof cover of claim 1, the cover body includes the abutting portion extending along the outer periphery of the opening portion and abutting against the back surface of the wall at the front surface of the cover body, and the wiring device and the wiring device fixture. A clamped portion that is clamped together with the wall material is provided. That is, the cover main body is arranged behind the wall through a through hole formed in the wall material, the wiring device fixture is accommodated in the housing portion of the cover main body, and the abutting portion is brought into contact with the wall rear surface and sandwiched. By sandwiching the portion together with the wall material between the wiring device and the wiring device fixture, the fireproof cover can be more easily installed behind the wall while the through hole is more securely closed. Therefore, the fireproof cover of the present invention makes it possible to more easily and reliably form a fireproof structure on the pre-installed wall material.

According to the fireproof cover of claim 2, in addition to the effect of the invention of claim 1, the fireproof cover can be temporarily held behind the wall by sticking the abutment portion to the wall backside by the sticking portion. can. This improves the ease of construction in the installation work of the fireproof cover.

According to the fireproof cover of claim 3, in addition to the effect of the invention of claim 1 or 2, by compressing the cover main body in the front-rear direction (the depth direction of the through-hole at the time of installation), the fireproof cover can be It is possible to easily arrange it behind the wall through the through hole.

According to the fireproof cover of claim 4, in addition to the effects of the invention of claim 3, since the cover body is made of an elastic material, even if the through hole is relatively small with respect to the size of the fireproof cover, , the cover body can be forcibly deformed to pass through the through hole. In addition, by making the cover main body of a thermally expandable material, the volume of the cover main body thermally expands in the event of a fire, enabling the through hole to be effectively blocked.

According to the fireproof cover of claim 5, in addition to the effect of the invention of claim 3 or 4, the side wall of the cover body can be freely expanded and deformed in the height direction by the bellows shape. With a simple structure, the cover body can be easily stretched and deformed in the front-rear direction.

According to the fireproof cover of claim 6, in addition to the effect of any one of claims 1 to 5, the bottom wall of the cover main body facing the front side of the through hole is made relatively thick. With a large amount of fireproof material, the fireproof effect can be more efficiently exerted.

According to the fireproof cover of claim 7, in addition to the effect of any one of claims 1 to 6, the contact part and/or the clamped part are made of a hard material, so that the wiring can be removed with a stronger force. It is possible to clamp by means of fixtures and wiring fixture fixtures.

According to the fireproof cover of claim 8, in addition to the effects of any one of claims 1 to 7, by providing the cover main body with a sound-absorbing filling member made of a foam material, high sound absorption can be obtained during installation. performance can be exhibited.

According to the fire-resistant device of claim 9, while exhibiting the effect of any one of claims 1 to 8 as a fire-resistant device, the wiring device is fixed to the wiring device fixture arranged behind the wall, It is possible to construct an installation structure for wiring devices on the wall material.

According to the installation structure of the wiring device according to claim 10, while exhibiting the effect of any one of claims 1 to 8, the through hole is more easily and reliably closed, and stable fire resistance is exhibited. It is possible.

According to the method for installing a wiring device according to claim 11, the cover body is arranged behind the wall through the through hole formed in the wall material, the wiring device fixture is housed in the housing portion of the cover body, By bringing the abutting portion into contact with the peripheral edge of the through hole on the back surface of the wall and holding the clamped portion together with the wall material between the wiring device and the wiring device fixture, the fireproof cover can be attached to the wall while the through hole is more securely closed. Easy to install on the back. In particular, since the wiring device can be fixed to the wiring device fixture and at the same time, the fireproof cover can be fixed behind the wall while the through hole is securely closed, the installation work of the wiring device can be expedited. Therefore, the method of the present invention makes it possible to more easily and reliably construct the installation structure of the fireproof wiring device on the preliminarily erected wall material.

1 is an exploded perspective view of a fireproof device according to one embodiment of the present invention; FIG. (a) A schematic perspective view from the front and (b) a schematic perspective view from the rear of the fire resistant cover of the fire resistant device of FIG. 1 . (a) A plan view, (b) a front view, (c) a side view and (d) a rear view of the fireproof cover of FIG. AA sectional drawing of the fireproof cover of FIG. 1. (a) The schematic perspective view seen from the front and (b) the schematic perspective view seen from the rear of the wiring fixture fixture of the fire-resistant apparatus of FIG. (a) A front view, (b) a side view, and (c) a plan view of the wiring device fixture of FIG. 6 . BB sectional view of the wiring device fixture of FIG. BRIEF DESCRIPTION OF THE DRAWINGS The schematic sectional drawing of the installation structure of the wiring accessories of one Embodiment of this invention. FIG. 9 is an exploded perspective view of the installation structure of FIG. 8; The schematic diagram which shows the process of arrange|positioning a fireproof cover to a wall back through a through-hole from a wall surface in the method of installing wiring accessories through the through-hole formed in the wall material. The schematic diagram which shows the process of accommodating a wiring-apparatus fixing tool in the accommodating part of a cover main body in the method of installing a wiring apparatus through the through-hole formed in the wall material. The schematic diagram which shows the process of fixing a wiring device to a wiring device fixing tool in the method of installing a wiring device through the through-hole formed in the wall material. The schematic sectional drawing of the installation structure of the wiring accessories of another embodiment of this invention. The schematic diagram which shows the fireproof cover of another embodiment of this invention. The schematic diagram which shows the fireproof cover of another embodiment of this invention.

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the shapes in the drawings referred to in the following description are conceptual diagrams or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios and the like do not necessarily match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratios in the drawings.

The fireproof cover 110 of the present embodiment seals the through hole 12 when the wiring device fixture 120 and the wiring device 13 are installed in the wall member 11 via the through hole 12 formed in the wall member 11 constituting the hollow wall. It is used to stop and prevent the inflow and outflow of toxic gases, smoke, flames, etc. generated in the event of a fire. Also, the fireproof device 100 of the present embodiment is composed of a fireproof cover 110 and a wiring device fixture 120, and is a device for installing the wiring device 13 on the wall member 11 through the through hole 12. FIG. Furthermore, the installation structure 10 of this embodiment is a structure in which the wiring device 10 is installed on the wall material 11 by the wiring device 100 (fireproof cover 110 and wiring device fixture 120) of this embodiment.

FIG. 1 is an exploded perspective view of a fireproof device 100 of this embodiment. As shown in FIG. 1, the fireproof device 100 includes a fireproof cover 110 installed behind the wall so as to block the through hole 12, and placed inside the fireproof cover 110 behind the wall through the through hole 12 from the surface of the wall, and a wiring device fixture 120 for fixing the wiring device 13 to the wall surface.

First, the configuration of the fireproof cover 110 of the present embodiment will be described with reference to FIGS. 2 to 4. FIG. 2A and 2B are schematic perspective views of the fireproof cover 110. FIG. 3(a) to (d) are a plan view, a front view, a side view and a rear view of the fireproof cover 110. FIG. FIG. 4 is a cross-sectional view of fireproof cover 110 taken along line AA.

The fireproof cover 110 of this embodiment includes a cover body 111 formed of a fireproof material in the shape of a bottomed box with an open front surface. The cover body 111 has a substantially rectangular flat bottom wall 111a that defines the rear surface, side walls 111b that are erected from the four sides of the bottom wall 111 toward the front side, and all of the side walls 111b that extend inward from the front ends of the side walls 111b by a predetermined length. It is constructed integrally with the flange 111c. Each side wall 111b has a bellows shape in which a plurality of pairs of peaks and valleys are alternately continuous. In this embodiment, the side wall 111b is formed with two pairs of peaks and valleys. By deforming the side wall 111b of the bellows structure in the height (upright) direction, the cover body 111 can be stretched and deformed back and forth. Further, in this embodiment, the bottom wall 111a of the cover body 111 is formed thicker than the side wall 111b. As a result, the relatively thick bottom wall 111a effectively insulates the sound propagating in the front direction of the wall material 11, and the relatively thin side wall 111b ensures high stretchability of the cover body 111. As shown in FIG. In this embodiment, the thickness of the bottom wall 111a is 2 mm, and the thickness of the side wall 111b and the flange 111c is 1 mm. It is preferable that the thickness of the bottom wall is about 1.5 times or more the thickness of the side wall in order to realize the improvement in sound insulation performance against sound propagating in the front-rear direction. That is, the fireproof cover 110 may be provided with sound insulation. When wiring is performed so that the cable passes through the bottom wall 111a, the bottom wall 111a can be cut by a cutter or the like. Moreover, the thickness of the fireproof cover 110 can be arbitrarily determined according to the installation environment, and it goes without saying that the bottom wall 111a and the side wall 111b may have the same thickness.

Inside the flange 111c of the cover body 111, an opening 112 having a substantially rectangular shape is provided on the front surface facing the bottom wall 111a. In other words, the flange 111c forms a perimeter that surrounds the opening 112 all around. The size of the opening 112 is preferably larger than the through hole 12 of the wall material 11 . Further, inside the cover body 111, a housing portion 113 surrounded by a peripheral wall (all side walls 111a) is formed. The housing portion 113 is a space for housing the wiring device fixture 120 and optionally a portion of the wiring device 13 . A front surface of the flange 111 c is formed with a contact portion 114 extending annularly along the outer periphery of the opening 112 . The contact portion 114 is formed in a planar shape so that the front face contacts the periphery of the through hole 12 on the rear surface of the wall without gaps. Preferably, a double-sided tape may be arranged as a sticking portion on the front surface of the contact portion 114 (not shown). The fireproof cover 110 can be temporarily held at a predetermined position on the rear surface of the wall by sticking the adhering portion to the periphery of the through hole 12 . In addition, as will be described later, the flange 111c serves as a sandwiched portion 115 that is sandwiched between the wiring device 13 and the wiring device fixture 120 (or the back surface of the wall) when the wiring device 13 is fixed to the wiring device fixture 120. Function.

The fireproof cover 110 of this embodiment is integrally formed of a heat-expandable material that can maintain its shape as a fireproof material. More specifically, the thermally expandable material is a thermally expandable rubber, and the thermally expandable rubber is an expansive material (e.g., an expandable material that expands to twice or more its volume before being heated when exposed to high heat (eg, 300° C. or higher)). Expanded graphite) is mixed, and the rubber is formed into a predetermined shape (which has undergone a molding process) and undergoes a vulcanization process. The vulcanization process is a process in which heat is applied to the rubber that has undergone the molding process to cause a vulcanization (crosslinking) reaction or adhesion reaction to obtain a product having rubber elasticity. The refractory member 110 maintains the shape of a box with a bottom due to the heat-expandable rubber itself.

Next, the configuration of the wiring device fixture 120 of the present embodiment will be described with reference to FIGS. 5 to 7. FIG. 5A and 5B are schematic perspective views of the wiring device fixture 120. FIG. 6(a) to (c) are a front view, a side view and a plan view of the wiring device fixture 120. FIG. FIG. 7 is a BB cross-sectional view of the wiring device fixture 120. As shown in FIG.

Wiring device fixture 120 is installed behind the wall and configured to fix wiring device 13 via through hole 12 formed in wall material 11 . Specifically, the wiring device fixture 120 consists of a flat frame 121 having a rectangular opening 121a in the center. A part of the wiring device 13 can be accommodated behind the wall through the opening 121 a of the frame 121 . Further, the frame body 121 is formed larger than the outer circumference of the through hole 12 of the wall material 11 so that the front surface thereof can be arranged to face the periphery of the through hole 12 . A clamping surface 121b for clamping the flange 111c (clamped portion 115) of the fireproof cover 110 is formed on the outer peripheral portion of the front surface of the frame 121. As shown in FIG.

A fixing portion 122 for fixing the wiring device 13 through the through hole 12 is formed in the frame 121 . The fixing portion 122 is composed of a pair of screw holes drilled above and below the opening 121a at the center in the width direction. A locking portion 123 projecting forward from the frame 121 is provided on the outer side of the fixing portion 122 in the vertical direction. The locking portion 123 is an arcuate projecting piece formed along the shape of the inner peripheral surface of the through hole 12 . That is, by bringing the pair of locking portions 123 into contact with the inner peripheral surface of the through hole 12, the installation position of the wiring device fixture 120 on the wall member 11 can be determined. That is, the locking portion 123 functions as positioning means.

In this embodiment, the wiring device fixture 120 is made of hard synthetic resin, but the present invention is not limited to the above embodiment. For example, wiring device fixture 120 may be made of metal or wood.

Next, with reference to FIGS. 8 and 9, the installation structure 10 of the wiring device 13 constructed by the fireproof device 100 (or the fireproof cover 110) of this embodiment will be described. FIG. 9 is a cross-sectional view showing the installation structure 10. As shown in FIG. FIG. 10 is an exploded perspective view of the installation structure 10. FIG.

As shown in FIG. 9 , in the installation structure 10 of the present embodiment, the wiring device 13 is installed on the wall member 11 through the through hole 12 so as to face the wall surface. That is, the installation structure 10 of the present embodiment includes a wall material 11 having a wall surface and a wall rear surface in which a through hole 11 is formed, a fireproof cover 110 installed on the wall rear surface, and a housing portion 113 of the fireproof cover 110. and a wiring device fixture 120 installed so as to face a wall surface through a through hole 12, and a wiring device 13 fixed to the wiring device fixture 120. - 特許庁The wiring fixture 13 can be selected from arbitrary fixtures installed on the wall material 11, such as an outlet, a switch, and a lighting device. The wiring device 13 includes an attachment frame portion 13a fixed to the wiring device fixture 120 via a screw hole 13c, and a body portion 13b supported by the attachment frame portion 13a.

More specifically, in the installation structure 10, the fireproof cover 110 is arranged in the space behind the wall so that the opening 112 of the fireproof cover 110 communicates with the through hole 12, and the contact portion 114 on the front surface of the flange 111c of the cover main body 111 It is in close contact with the perimeter of the through hole 12 on the back surface of the wall over the entire circumference. That is, the through hole 12 is closed by the fireproof cover 110 . In other words, the fireproof cover 110 separates the wall front space and the wall back space in the sealed state at the through hole 12 . In the housing portion 113 of the fireproof cover 110, the wiring device fixture 120 and a portion of the wiring device 13 (body portion 13b) are arranged. The wiring device fixture 120 is fixed to the wall material 11 and the fireproof cover 110 , and the locking portion 123 of the wiring device fixture 120 contacts the inner peripheral surface of the through hole 12 and the opening 121 a communicates with the through hole 12 . ing. Moreover, the clamping surface 121b of the outer peripheral portion of the frame 121 of the wiring device fixture 120 is positioned so as to face the rear surface of the wall. The holding surface 121b is in pressure contact with the rear surface of the flange 111c of the fireproof cover 110 over the entire circumference of the through hole 12 . Wiring device 13 is fixed to wiring device fixture 120 . The rear surface of the mounting frame portion 13a of the wiring device 13 is in contact with the entire periphery of the through hole 12 on the wall surface. A screw 125 is screwed into the screw hole 13c and the fixing portion 122 while the screw hole 13c of the mounting frame portion 13a and the fixing portion 122 of the wiring device fixture 120 are aligned in the depth direction of the through hole 12. . In this state, the wall member 11 and the flange 111c of the fireproof cover 110 are pressed between the holding surface 121b of the frame 121 of the wiring device fixture 120 and the rear surface (holding surface) of the mounting frame portion 13a of the wiring device 13. . As a result, in the installation structure 10 , the wiring device 13 is installed on the wall material 11 through the through hole 12 in a state where the through hole 12 is closed with a fireproof material. That is, in the installation structure 10 , the fireproof cover 110 closes the through hole 12 , so that toxic gas, smoke, flame, etc. generated by the fire flow out to the space behind the wall through the through hole 12 , or To effectively prevent toxic gas, smoke, flame, etc. from flowing into the wall surface space from. In addition, even if a violent fire occurs such that the wiring device 13 is thermally melted from the front side of the wall, the fireproof cover 110 thermally expands several times and closes the through hole 12, thereby allowing toxic gas, smoke, flame, etc. to penetrate. It is possible to more reliably prevent the liquid from flowing out to another space through the hole 12 .

Next, with reference to FIGS. 10 to 12, a method of installing the wiring device 13 on the wall member 11 through the through hole 12 formed in the wall member 13 in order to construct the installation structure 10 will be described. For convenience of explanation, illustration of the main body portion 13b of the wiring accessory 13 is omitted in the drawings.

First, as shown in FIG. 10, the fireproof cover 110 is arranged from the wall surface to the wall back through the through hole 12 drilled in the wall member 11 . Specifically, the fireproof cover 110 is crushed in the front-rear direction (the direction in which the side walls 111b are erected), and the entire fireproof cover 110 is compressed and deformed to a size that allows it to pass through the through hole 12 or a size that allows it to easily pass through. Then, while tilting the elastically compressed fireproof cover 110 with respect to the wall material 11, the fireproof cover 110 is passed through the through hole 12 and arranged in the space behind the wall. Preferably, in the space behind the wall, the fireproof cover 110 is held at a predetermined position behind the wall by attaching the contact portion 114 of the flange 111c to the periphery of the through hole 12 on the back surface of the wall with a sticking portion (double-sided tape). can be done.

Next, as shown in FIG. 11 , the wiring device fixture 120 is inserted into the through hole 12 from the wall surface to the wall rear side, and the wiring device fixture 120 is housed in the housing portion 113 of the cover body 111 . Then, the clamping surface 121b of the frame 121 of the wiring device fixture 120 is opposed to the periphery of the through hole 12 on the back surface of the wall and the back surface of the flange 111c. At this time, the fireproof cover 110 and the wiring device fixture 120 are arranged so that the opening 112 of the fireproof cover 110 and the opening 121a of the wiring device fixture 120 face the wall through the through hole 12 .

Then, as shown in FIG. 12, with the abutting portion 114 on the front surface of the flange 111c in contact with the peripheral edge of the through hole 12 on the rear surface of the wall, the sandwiched portion 115 of the cover body 111 is attached to the wiring device 13 and the wiring device fixture. The wiring device 13 is fixed to the wiring device fixture 120 so as to be sandwiched together with the wall material 11 by the wiring device 120 . Specifically, the screw holes 13c of the wiring device 13 and the fixing portions 122 of the wiring device fixture 120 are aligned with each other, and a pair of screws 125 are screwed into the screw holes 13c and the fixing portions 122, respectively. By tightening the screw 125 strongly, the wiring device 13 and the wiring device fixing member 120 are drawn to each other, and the pinched portion 115c can be pinched by the wiring device 13 and the wiring device fixing member 120. FIG. In addition, this fastening force allows the abutting portion 114 to be more reliably press-contacted (adhered) to the back surface of the wall with a strong force, thereby sealing the space between the wall member 11 and the flange 111c without any gap. As a result, the wiring device 13 , the fireproof cover 110 and the wiring device fixture 120 can be installed on the wall member 11 while closing the through hole 12 with a fireproof material. That is, according to the method of the present embodiment, it is possible to construct a fireproof structure at the same time as installing the wiring device 13 on the wall material 11 that has been erected in advance.

In addition, as in the installation structure 10' shown in FIG. Some spaces may be additionally filled or supplemented. Alternatively, as the filling member 117, instead of urethane foam, heat-resistant putty or thermally expandable putty may be used to fill at least a part of the space of the accommodating portion 113 in order to improve fire resistance. The heat-expandable putty is a clay-like heat-expandable heat-resistant sealing material, and this heat-expandable rubber is an expansive material that expands to more than twice the volume before heating when exposed to high heat (for example, 300 ° C. or higher). expanded graphite) and the like are mixed with unvulcanized rubber.

Hereinafter, the effects of the fireproof device 100 and the fireproof cover 110 according to one embodiment of the present invention will be described. Compensating material

The cover main body 111 of the fireproof cover 110 of the present embodiment includes a contact portion 114 extending along the outer periphery of the opening 112 and contacting the back surface of the wall at the front surface of the cover main body 111, the wiring device 13 and the wiring device fixture. A clamped portion 115 clamped together with the wall material 11 by 120 is provided on the flange 111c. That is, through the through hole 12 formed in the wall material 11, the fireproof cover 110 is arranged behind the wall, the wiring device fixture 120 is accommodated in the accommodation portion 113 of the cover main body 111, and the contact portion 114 is placed on the back surface of the wall. , and the sandwiched portion 115 is sandwiched between the wiring device 13 and the wiring device fixture 120 together with the wall material 11, so that the fireproof cover 110 can be easily installed behind the wall while the through hole 13 is sealed. be able to. In particular, as compared with the case where the wall material is erected after installing the fireproof cover as in the past, the mounting work is directly performed on the wall material 11 that has already been erected, so that the fireproof measures can be taken more reliably. It is possible. Therefore, the fireproof device 100 and the fireproof cover 110 of the present embodiment make it possible to install the wiring fixture 13 on the wall material 11 erected in advance and to construct the fireproof structure more easily and reliably. is.

[Modification]
The present invention is not limited to the above embodiments, and can take various embodiments and modifications. A plurality of modified examples of the present invention will be described below. In each embodiment, unless otherwise specified, components having the same last two digits have the same or similar features, and the description thereof will be partially omitted.

(1) The fireproof cover of the present invention is not limited to the above embodiments. A frame member 218 made of a hard material may be attached to the flange 211c like the fireproof cover 210 in FIG. The hard material can be selected from metal materials, hard synthetic resins, and the like. Further, in the fireproof cover 210, a contact portion 214 is formed on the front surface of the frame member 218, and the frame member 218 functions as a sandwiched portion 215 that is sandwiched between the wiring device and the wiring device fixture. That is, by forming the abutting portion 214 and/or the pinched portion 215 from a frame member made of a hard material, it is possible to pinch and press the wiring device and the wiring device fixture with a stronger force. In addition, when there are many irregularities on the back surface of the wall, it is preferable to select a soft abutting portion and a portion to be clamped in consideration of close contact with the back surface of the wall.

(2) The shape and dimensions of the fireproof cover of the present invention are not limited to the above embodiments. The opening of the fireproof cover and the front shape of the cover body may not be rectangular, and may be selected from arbitrary shapes such as circular, elliptical, and other polygonal shapes. Moreover, the bellows structure of the side wall may be omitted.

(3) In the above embodiment, the abutting portion and the pinched portion are formed integrally with the flange of the fireproof cover, but the abutting portion and the pinched portion may be formed separately. For example, as in the fireproof cover 310 of FIG. 15, instead of the flange, a protruding piece extending inside the opening 312 is used as the sandwiched portion 315, and an annular flange extending outside the opening 312 is used as the contact portion. 314 may be used. The contact portion 314 may be tilted forward in order to more reliably bring the contact portion 314 into closer contact with the back surface of the wall by the clamping pressure of the pinched portion.

(4) The wiring devices and wiring device fixtures of the above embodiments are merely examples, and various shapes and applications can be adopted. For example, the wiring device fixture may be a C-shaped frame that does not come into pressure contact with the portion to be clamped over the entire perimeter of the through hole. Alternatively, the wiring fitting fixture may be in the form of a wiring box. In this case, the wiring accessory is fixed to the wiring box while the wiring box is housed in the housing portion of the fireproof cover. When fixing, the fixing portion of the wiring box faces the wall surface through the through hole, and the sandwiched portion of the fireproof cover is sandwiched together with the wall material by the opening of the wiring device and the wiring box.

(5) Although the fireproof cover of the present embodiment is made of thermally expandable rubber, it may be made of a non-thermally expandable fireproof material. For example, the fireproof cover may be made of flame-retardant rubber, flame-retardant resin, metal, or the like. Furthermore, the fireproof cover may be made of a soundproof fireproof material. For example, sound insulating materials include rubber having a high specific gravity and high hardness produced by a vulcanization molding method. Ethylene propylene diene rubber (EPDM) is used as the high hardness rubber, and rubber having a specific gravity of 2 or more and a hardness of 85 to 95 is used. The hardness of rubber is measured by a measuring method (JIS K6253) using a durometer, which is a measuring method adopted for vulcanized rubber. The refractory cover can then be made of rubber whose hardness is measured using a type D durometer for high hardness. The hardness of the fireproof cover is preferably set to a hardness of 85 or more so that when the sound generated on the front side of the wall propagates to the fireproof cover, the cover body can be prevented from vibrating due to the sound. Further, the hardness of the fireproof cover is preferably set to 85 or more in order to maintain the shape of the cover body (especially the flange). Furthermore, the hardness of the fireproof cover is preferably set to 95 or less so that the fireproof cover 110 can be easily deformed.

The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms within the technical scope of the present invention.

10 Installation structure 11 Wall material 12 Through hole 13 Wiring device 13a Mounting frame 13b Main body 13c Screw hole 100 Fireproof device 110 Fireproof cover 111 Cover main body 111a Bottom wall 111b Side wall 111c Flange 112 Opening 113 Housing 114 Abutment 115 Cover Clamping portion 117 Filling member 120 Wiring device fixture 121 Frame body 121a Opening 121b Clamping surface 122 Fixing portion 123 Locking portion 125 Screw

Claims (11)

A fireproof cover that accommodates wiring device fixtures for fixing wiring devices through through-holes formed in the wall material behind the wall, and that is installed behind the wall so as to close the through-holes,
A cover body formed of a refractory material in the shape of a bottomed box having a bottom wall and side walls,
The cover body is
an opening that opens at a front surface facing the bottom wall; an accommodating portion for accommodating the wiring device fixture;
a contact portion extending along the outer periphery of the opening and contacting the back surface of the wall at the front surface;
and a clamped portion that is clamped together with the wall material by the wiring device and the wiring device fixture when the wiring device is fixed to the wiring device fixture. 2. The fireproof cover according to claim 1, wherein said abutting portion comprises a sticking portion that sticks to the back of the wall. The fireproof cover according to claim 1 or 2, wherein the cover main body is formed so as to be compressively deformable so as to pass through the through hole. 4. The fireproof cover according to claim 3, wherein the cover body is made of a thermally expandable elastic material. 5. The fireproof cover according to claim 3, wherein the side wall of the cover body has a bellows shape in which peaks and valleys are alternately continuous. 6. The fireproof cover according to any one of claims 1 to 5, wherein the bottom wall of the cover body is thicker than the side walls. 7. The fireproof cover according to any one of claims 1 to 6, wherein the abutting portion and/or the sandwiched portion are made of a hard material frame member having an opening into which the wiring device can be inserted. . 8. The fire resistant cover of any one of claims 1-7, further comprising a sound absorbing filler member of foam material disposed within the cover body. A fireproof device that is installed behind the wall so as to block the through-hole while fixing the wiring device to the wall surface through the through-hole formed in the wall material,
A fireproof cover according to any one of claims 1 to 8;
A fire-resistant device, comprising: a wiring device fixture that has a fixing portion for fixing a wiring device, and is arranged from the wall surface to the wall rear side through the through hole. a wall material having a wall surface and a wall back surface in which through holes are formed;
a fireproof cover according to any one of claims 1 to 8 installed behind a wall;
a wiring device fixture that is housed in the housing portion of the fireproof cover and installed so that the fixing portion faces the wall surface via the through hole;
and a wiring device fixed to the wiring device fixture,
With the abutting portion of the front surface of the cover main body of the fireproof cover in contact with the peripheral edge of the through hole on the rear surface of the wall, the wiring device and the wiring device fixing device sandwich the sandwiched portion of the fireproof cover together with the wall material. An installation structure for a wiring device, characterized in that: A method for installing a wiring device through a through hole formed in a wall material,
a step of disposing a fireproof cover having a cover body which is open to the front and is formed in the shape of a bottomed box made of a fireproof material and has a bottom wall and side walls from the wall surface to the wall rear surface through the through hole;
a step of housing a wiring device fixture for fixing the wiring device in a housing portion of the cover body;
With the abutting portion surrounding the opening of the front surface of the cover main body in contact with the periphery of the through hole on the rear surface of the wall, the part to be held of the cover main body is held together with the wall material by the wiring device and the wiring device fixing device. securing the wiring device to the wiring device fixture in a clamping manner.

Images