JP2020117970A - Fixture - Google Patents

Abstract

To provide an inexpensive fixture that has excellent fire-protection and smokeproof performance and a simple structure.SOLUTION: A fixture (a door) for opening and closing an opening positioned between one space and another space comprises an entry 5 provided in one face plate (a front-face plate 11) of the door, an exit 6 provided in another face plate (a rear-face plate 12) of the door, and a passage constituting body 7 for connecting the entry 5 and the exit 6. The passage constituting body 7 comprises a passage member 40 that forms a passage 45 for connecting the entry 5 and the exit 6, a rotary central shaft 38, and an opening/closing door 31 for rotating with the rotary central shaft 38 as the center of rotation to open and close the entry 5. The passage constituting body 7 is provided with a thermal expansion material 10 for expanding when receiving heat.SELECTED DRAWING: Figure 7

Description

The present invention relates to a fitting with a fire and smoke prevention function.

A door having a hollow structure (entrance door), for example, a post port (postal port) as an entrance provided on the plate surface outside the room, an exit provided on the plate surface inside the room, and an entrance and an exit. A fitting that includes a passage that connects the two, a door plate (opening lid) that opens and closes the entrance, and a fire damper that is urged by a spring to keep the door plate closed when the temperature fuse melts during a fire. Doors are known (see Patent Document 1, etc.).

JP-A-6-319826

However, like the door disclosed in Patent Document 1, in a fitting with a fire prevention function that keeps the opening and closing plate that opens and closes the entrance when the temperature fuse is blown during a fire, the temperature fuse, the spring, the fire damper Since there is a need for an apparatus configuration in which a large number of parts such as the above are associated with each other, the structure becomes complicated, and the parts cost and the manufacturing cost increase.
Further, according to the door disclosed in Patent Document 1, even when the fire damper for maintaining the opening/closing plate in a closed state is urged by the spring in the event of a fire, the opening/closing plate and the fire preventing damper are deformed by heat. Then, a gap is created between the inlet and the opening/closing plate, and there is a possibility that flame or smoke may pass through the gap, so there is a problem that there is room for improvement in the fire and smoke prevention function.

In order to solve the above problems, the present invention provides a fitting which has an excellent fire and smoke prevention function, a simple structure, and a low cost.

The fitting according to the present invention is a fitting that opens and closes an opening located between one space and the other space, and an inlet provided on one face plate of the door and an outlet provided on the other face plate of the door. , A passage member that connects the inlet and the outlet, the passage member forming a passage that connects the inlet and the outlet, a rotation center axis, and an inlet that rotates about the rotation center axis. And a door for opening and closing, and a thermal expansion material that expands when receiving heat is provided in the passage structure.
Further, the thermal expansion material is provided around the rotation center axis.
Further, the passage member is provided with a plate forming the passage, a through hole is formed in the plate forming the passage, and the thermal expansion material is attached to a back surface of the passage so as to close the through hole.
According to the present invention, since the thermal expansion material that receives heat and expands in the event of a fire is provided in the passage structure, the thermal expansion material expands due to the heat in the event of a fire. You will be able to close the gap between them. Further, since the thermal expansion material is simply provided in the passage structure, the fitting has a simple structure and is inexpensive.
That is, according to the present invention, it is possible to provide a fitting which has an excellent fire and smoke prevention function and has a simple structure and is inexpensive.

The perspective view which looked at the door from the outdoor side. The perspective view which looked at the door from the indoor side. The cross-sectional view of a door. FIG. The disassembled perspective view which shows a passage structure. The perspective view which looked at the entrance opening and closing mechanism from the back side. The longitudinal cross-sectional view which expands and shows the part of the passage structure of a door. FIG. 4 is a perspective view showing a passage member provided with a thermal expansion material so as to close a plurality of through holes. The longitudinal cross-sectional view which expands and shows the part of the passage structure of a door.

Embodiment 1
As shown in FIGS. 1 and 2, a door 1 according to the first embodiment is a door 1 for opening and closing an opening 4 located between an outdoor space 2 as one space and an indoor space 3 as another space. In addition, an inlet 5 provided on a surface plate (one face plate of the door 1) 11 on the outdoor side 2 and an outlet 6 provided on a back plate (the other face plate of the door 1) on the indoor side 3 side, It is, for example, an entrance door provided with a passage forming body 7 that connects the inlet 5 and the outlet 6 and a thermal expansion material 10 that is provided in the passage forming body 7 and expands when receiving heat.
In this specification, the top, bottom, left, right, front (front), and back (rear) of the door 1 are defined as the directions shown in FIGS.

As shown in FIGS. 1 and 2, the door 1 includes, for example, a surface plate 11 and an indoor 3 side, which are surface plates on the outdoor 2 side and are arranged so that the plate surfaces face each other in parallel at a predetermined interval. A back plate 12 serving as a face plate; an upper end face plate 13 provided so as to close a space between an upper edge of the front plate 11 and an upper edge of the back plate 12, a left edge of the front plate 11 and a left edge of the back plate 12. A left end face plate 14 provided so as to close the space between the left end face plate 14 and a right end face plate 15 provided so as to close a space between the right end edge of the front face plate 11 and the right end edge of the back face plate 12, and the lower end edge of the front face plate 11 and the back side. A rectangular door having a hollow structure, which is configured to include a lower end face plate 16 provided so as to close the lower end edge of the face plate 12.
The front plate 11 and the back plate 12 are formed of a metal plate such as a steel plate.
In addition, the upper end face plate 13, the left end face plate 14, the right end face plate 15, and the lower end face plate 16 are made of elongate members (power bones) formed in a concave shape in cross section by a metal plate such as a steel plate.
Further, in the vicinity of the portion where the door handle 17 is installed, between the front surface plate 11 and the rear surface plate 12, for example, a reinforcing long member 18 formed of a metal plate such as a steel plate in a concave shape in cross section, It is provided so as to extend in the vertical direction.
In FIG. 2, 17a is a main lock cylinder and 17b is an auxiliary lock cylinder.
Further, as shown in FIG. 3, the door frame 4A is installed in the opening 8A provided in the wall 8 of the building, and the right side edge or the left side edge of the door 1 that opens and closes the opening 4 inside the door frame 4A is By being attached to the door frame 4A via the hinge 4B, the door 1 is attached to the door frame 4A so that the opening 4 can be opened and closed.
Further, for example, a smoke return 19 (see FIGS. 1 and 3) is attached to the left end face plate 14 which is the door end.

As shown in FIG. 5, the front surface plate 11 is formed with an inlet side opening 11A and boss through holes 11B and 11B.
The inlet-side opening 11A is formed of a rectangular through hole that is long in the left-right direction and is formed slightly below the center position between the top and bottom of the surface plate 11 and at the center position between the left and right sides.
The boss through hole 11B is a through hole that penetrates a cylindrical boss 23 described later, and is located at a position near the left opening edge of the inlet side opening 11A in the surface plate 11 and the right opening edge of the inlet side opening 11A in the surface plate 11. It is formed in the vicinity position.

As shown in FIG. 5, the back plate 12 is formed with an outlet side opening 12A and a screw through hole (not shown) through which a fixing screw 55 described later is passed. The screw through holes are formed at positions near the left opening edge of the outlet side opening 12A and at positions near the right opening edge of the outlet side opening 12A, respectively.
The outlet-side opening 12A is formed by a rectangular through hole that is long in the left-right direction and is formed slightly below the center position between the upper and lower sides of the back plate 12 and at the center position between the left and right sides.
The outlet side opening 12A has an upper opening edge provided at the same height position as the upper opening edge of the inlet side opening 11A, and a lower opening edge provided below the lower edge of the inlet side opening 11A.
That is, the outlet opening 12A is formed such that the opening width dimension in the left-right direction is substantially the same as the opening width dimension in the left-right direction of the inlet opening 11A, and the opening width dimension in the vertical direction is the vertical direction of the inlet opening 11A. The opening width is larger than the opening width dimension of.

As shown in FIG. 5, the passage forming body 7 formed of, for example, a metal includes an inlet frame plate 20, an inlet opening/closing mechanism constituting member 30, a passage member 40, and an outlet frame plate 50.

The inlet frame plate 20 includes a flat plate formed in a rectangular shape that is long in the left-right direction and a rectangular opening 21 that is long in the left-right direction and serves as the inlet 5 formed by a through hole. And a frame portion 22 that surrounds the periphery of the opening 21.
The size of the inlet side opening 11A formed in the surface plate 11 is larger than the size of the inlet 5 and smaller than the outer size of the inlet frame plate 20. Then, in order to prevent the opening edge of the entrance side opening 11A from being visually recognized from the outside 2, the entrance frame is placed so that the opening edge of the entrance side opening 11A is positioned on the back side of the frame portion 22 of the entrance frame plate 20. The plate 20 is installed on the surface of the face plate 11.
On the left and right sides of the back surface of the frame portion 22 of the inlet frame plate 20, bosses 23, 23 each having a screw hole 56 into which a fixing screw 55 is fastened are provided.
Further, shaft fixing portions 24, 24 for fixing a rotation center shaft 38 of an opening/closing door 31, which will be described later, are provided on the left and right upper sides of the back surface of the frame portion 22 of the inlet frame plate 20.

The entrance opening/closing mechanism constituting member 30 includes an opening/closing door 31 and a rotation support structure portion 32.

The opening/closing door 31 includes a door portion 33 and a mounting portion 34 attached to the rotation center shaft 38.
The door portion 33 is formed of a rectangular plate that is long in the left-right direction and has a lateral width dimension corresponding to the lateral width dimension of the entrance 5 and a vertical width dimension larger than the vertical width dimension of the entrance 5. To be done.
The door 33 includes a closing plate 35 formed to have a size slightly smaller than the entrance 5 so as to be able to enter the inside of the entrance 5 from the back surface side of the entrance frame plate 20, and a rear end of the closing plate 35 from the lower end edge of the closing plate 35. And a restricting plate 36 that extends downward after projecting to.
When the closing plate 35 enters the inside of the entrance 5 and the entrance 5 is closed, the restriction plate 36 makes surface contact with the lower back surface of the frame portion 22 of the entrance frame plate 20, and the closing plate 35 enters the entrance plate 35. It is a plate that is regulated so as not to project to the outside 2 from 5.
The attachment portions 34 to the rotation center shaft 38 are provided on the left and right sides of the upper edge of the closing plate 35.
The mounting portion 34 is configured to include a hook portion 37 that is formed to project upward from the upper edge of the closing plate 35 and then be folded back downward.

The rotation support structure 32 includes a rotation center shaft 38, both ends of which are fixed to the shaft fixing portions 24, 24 of the inlet frame plate 20, and torsion coil springs 39, 39, which are wound around the left and right sides of the rotation center shaft 38, respectively. It is configured with.

The passage member 40 includes a passage 45 formed by being surrounded by an upper plate 41, a lower plate 42, a left plate 43, and a right plate 44, a front flange portion 46 provided on a front end edge of the passage 45, and a passage 45. And a rear flange portion 47 provided at the rear edge.
The lower surface of the passage 45 (the upper surface of the lower plate 42) is formed as an inclined surface that inclines downward from the inlet 5 side toward the outlet 6 side.
The front brim portion 46 includes an upper brim portion 46 a extending from the front edge of the upper plate 41 in an upward direction orthogonal to the plate surface of the upper plate 41, and a lower end of the lower plate 42 orthogonal to the plate surface of the upper plate 41. Direction, a lower collar portion 46b, a left collar portion 46c extending leftward from the front edge of the left plate 43 orthogonal to the plate surface of the left plate 43, and a plate surface of the right plate 44 from the front edge of the right plate 44. And a right flange portion 46d extending in the right direction orthogonal to.
Similarly, the rear brim portion 47 includes an upper brim portion 47 a extending from the rear end edge of the upper plate 41 in an upward direction orthogonal to the plate surface of the upper plate 41, and a plate of the upper plate 41 from the rear end edge of the lower plate 42. A lower brim portion 47b extending in the downward direction orthogonal to the plane, a left brim portion 47c extending in the left direction orthogonal to the plate surface of the left plate 43 from the rear edge of the left plate 43, and a rear edge of the right plate 44. A right collar portion 47d extending in the right direction orthogonal to the plate surface of the right plate 44 is provided.
The front and rear left flange portions 46c and 47c are formed with screw through holes 49 and 49 for allowing the left fixing screw 55 to pass therethrough, and the front and rear right flange portions 46d and 47d are respectively provided with the right fixing screw 55. Threaded through holes 49, 49 are formed so as to pass therethrough.

The outlet frame plate 50 includes a flat plate that is formed in a rectangular shape that is long in the left-right direction and has a rectangular opening 51 that is long in the left-right direction and serves as the outlet 6 formed by a through hole. And a frame portion 52 that surrounds the periphery of the opening 51.
Through holes 53, 53 are formed on the left and right sides of the frame portion 52 of the outlet frame plate 50, respectively, through which the fixing screws 55 penetrate.
Further, the size of the outlet 6, the size of the outlet side opening 12A formed in the back plate 12, and the size of the outlet side opening 45A of the passage 45 are formed to be substantially the same.
Then, the opening edge of the outlet 6 of the outlet frame plate 50, the opening edge of the outlet side opening 12A formed in the back plate 12, and the opening edge of the outlet side opening 45A of the passage 45 are assembled.

As the thermal expansion material 10, for example, a material formed into a plate shape by a thermal expansion rubber or a thermal expansion sponge having fire resistance, for example, "Sekisui thermal expansion refractory material Fiblock (registered trademark)", Sekisui Chemical Co., Ltd. A product manufactured by Kogyo Co., Ltd. is used.
The thermal expansion material 10 is provided so as to be wound around the rotation center shaft 38 between the left and right torsion coil springs 39, 39 on the rotation center shaft 38.

The inlet opening/closing mechanism 60 configured to rotatably support the opening/closing door 31 about the rotation center shaft 38 and to open/close the inlet 5 is assembled as follows, for example.
After the right end side of the rotation center shaft 38 is penetrated from the left side into the through hole 25 of the left shaft fixing portion 24, the rotation center shaft 38 is passed from the right end side into the hollow portions of the left and right torsion coil springs 39:39, and thereafter. The right end side of the rotation center shaft 38 is passed through the through hole 25 of the right shaft fixing portion 24, and the rotation center shaft 38 is fixed to the left and right shaft fixing portions 24, 24 with an adhesive or the like.
Further, the left and right hook portions 37, 37 of the opening/closing door 31 are hooked on the left and right end portions of the rotation center shaft 38 that protrudes leftward and rightward from the left and right shaft fixing portions 24, 24.
Then, one ends of the left and right torsion coil springs 39, 39 are fixed to the rotation center shaft 38, respectively, and the other ends of the left and right torsion coil springs 39, 39 are backed by the elasticity of the torsion coil spring 39. The opening/closing door 31 is set in a closed state in which the inlet 5 is closed by the elastic force of the left and right torsion coil springs 39, 39.
Further, when a force stronger than the biasing force due to the elasticity of the left and right torsion coil springs 39, 39 is applied to the opening/closing door 31 from the outdoor side 2 through the inlet 5, the opening/closing door 31 causes the rotation center shaft 38 to move. It rotates about the rotation center and is set in an open state in which the inlet 5 opens.
Further, the thermal expansion material 10 that expands when receiving heat is installed around the rotation center shaft 38 between the left and right torsion coil springs 39, 39.
As described above, the inlet opening/closing mechanism 60 in which the opening/closing door 31 is rotatably attached to the back side of the inlet frame plate 20 is configured as shown in FIG.

The passage structure 7 is assembled, for example, as follows.
The inlet side opening 11A of the surface plate 11 is located on the back side of the inlet opening/closing mechanism 60, the bosses 23, 23 provided on the back side of the inlet opening/closing mechanism 60 are passed through the boss through holes 11B, 11B, and the shaft fixing portion 24, 24 and the rotation center shaft 38 are set in a state of protruding to the rear of the surface plate 11 via the inlet side opening 11A.
Next, the passage member 40 is installed so that the screw through holes 49, 49 formed in the left and right flange portions 46c, 46d of the front flange portion 46 and the through holes 25, 25 of the bosses 23, 23 are aligned with each other.
Then, the outlet side opening 45A of the passage 45 surrounded by the upper, lower, left, and right collar portions 47a to 47d forming the rear flange portion 47 of the passage member 40 and the outlet side opening 12A formed in the rear plate 12 correspond to each other. The rear plate 12 is installed behind the passage member 40.
Then, the outlet frame plate 50 is installed on the front surface (the surface on the indoor side 3 side) of the back plate 12.
Then, the tip of the left fixing screw 55 is connected to the left through hole 53 of the outlet frame plate 50, the through hole (not shown) formed in the outlet side opening 12A of the rear plate 12, and the front and rear left collar portions 46c of the passage member 40. , 47c through the screw through holes 49, 49 formed in the left boss 23 and fastened to the screw hole 56 of the left boss 23.
Similarly, the tip end of the right fixing screw 55 is connected to the right through hole 53 of the outlet frame plate 50, the through hole (not shown) formed in the outlet side opening 12A of the rear plate 12, and the front and rear right flange portions of the passage member 40. It passes through the screw through holes 49, 49 formed in 46d, 47d and is fastened to the screw hole 56 of the right boss 23.
As described above, as shown in FIG. 7, the passage structure 7 is assembled to the front plate 11 and the rear plate 12.

Then, a long member 18 for reinforcement is provided near the portion where the door handle 17 is installed so as to extend in the vertical direction, and the long member 18 is fixed to the front plate 11 and the back plate 12 by welding or the like. Further, the upper end face plate 13 is attached between the upper end of the front face plate 11 and the upper end of the rear face plate 12, and the left end face plate 14 is attached between the left end of the front face plate 11 and the left end of the rear face plate 12. The right end face plate 15 is attached between the right end and the right end of the back plate 12, and the lower end face plate 16 is attached between the lower end of the front plate 11 and the lower end of the back plate 12 to form the door 1.

Further, a receiving box 70 (see FIG. 2) for receiving postal items falling inside the room via the outlet 6 may be attached to the surface of the back plate 12 (the surface on the side of the room 3).
Outlets 71, 71 are formed on the left and right side walls of the receiving box 70.

When the receiving box 70 is attached, the outlet frame plate 50 described above may not be attached.
When the outlet frame plate 50 is not attached, for example, as shown in FIG. 4, a bracket 72 is installed on the surface of the back plate 12 instead of the outlet frame plate 50, and the bracket 72 is fixed with a fixing screw 55, The left and right upper side surfaces of the receiving box 70 are screwed to the bracket 72 with screws 73, and the upper mounting piece provided so as to extend downward from the upper front end edge of the receiving box 70 and the receiving box 70. The lower mounting piece provided so as to extend upward from the lower front edge is fixed to the back plate 12 of the door 1 by using screws 74 and 75, respectively, so that the receiving box 70 is placed on the front surface of the back plate 12. It may be configured to be attached to.
In this case, postal items and the like posted through the entrance 5 pass through the passage 45, the exit-side opening 45A that serves as the exit 6, and the exit-side opening 12A, and fall into the receiving box 70. The postal matter and the like in 70 can be taken out through the outlets 71, 71.

According to the first embodiment, the inlet 5 formed in the inlet frame plate 20 attached to the surface plate (one face plate) 11 of the door 1 and the outlet provided in the back plate (the other face plate) 12 of the door 1. 6 and a passage forming body 7 that connects the inlet 5 and the outlet 6, and the passage forming body 7 forms a passage 45 that connects the inlet 5 and the outlet 6 and a rear surface of the inlet frame plate 20. Between the left and right torsion coil springs 39, 39 in the rotation center shaft 38, in a configuration including a fixed rotation center shaft 38 and an opening/closing door 31 that rotates about the rotation center shaft 38 as a rotation center to open and close the inlet 5. Since the thermal expansion material 10 is provided in the above, when the thermal expansion material 10 receives heat during a fire, the thermal expansion material 10 expands in volume by about 10 times, so that the opening/closing door 31 is opened outdoors. It is possible to prevent the gap between the front surface of the regulation plate 36 of the opening/closing door 31 and the back surface of the inlet frame plate 20 from being expanded by pressing to the second side.
Further, the thermal expansion material 10 expands in volume by about 10 times, so that the gap between the upper end surface of the closing plate 35 of the opening/closing door 31 and the upper opening edge of the entrance 5 and the closing plate 35 of the opening/closing door 31. A gap between the left and right end surfaces and the left and right opening edges of the entrance 5, and a gap between the front surface of the regulation plate 36 of the opening/closing door 31 and the back surface of the entrance frame plate 20 are closed.
That is, according to the door 1 according to the first embodiment, the thermal expansion material 10 receives heat and expands during a fire, so that the gap between the inlet 5 and the opening/closing door 31 can be closed.
That is, it is possible to provide the door 1 having an excellent fire and smoke prevention function.
Further, since only the thermal expansion material 10 is provided and the device configuration associated with a large number of parts such as the door disclosed in Patent Document 1 can be dispensed with, it is possible to provide a fitting having a simple structure and inexpensive.
That is, according to the first embodiment, it is possible to provide a fitting which has an excellent fire and smoke prevention function and has a simple structure and is inexpensive.

Further, in the vicinity of the portion where the door handle 17 is installed, the reinforcing long member 18 is provided between the front plate 11 and the rear plate 12 so as to extend in the vertical direction. It becomes possible to suppress the thermal warp phenomenon of the front surface plate 11 and the rear surface plate 12 due to the heat applied to the front surface plate 11 and the rear surface plate 12, and the upper end surface plate 13, the left end surface plate 14, the right end surface plate 15 and the lower end surface plate 16 are configured. Since it becomes possible to suppress the generation of a gap that is disadvantageous in terms of fire and smoke prevention performance between the door four-sided frame structure and the front plate 11 and the back plate 12, a door excellent in fire and smoke prevention performance. 1 can be provided.

Embodiment 2
As shown in FIGS. 8 and 9, through holes 65 are formed in the lower plate 42 forming the lower surface 42 a of the passage 45, and the lower plate 42 is expanded so as to close the through holes 65 when it receives heat. The thermal expansion material 10 may be attached to the rear surface 42u of the lower surface 42a.
For example, as shown in FIG. 8, a plurality of through holes 65, 65... Are formed along the lower plate 42 of the passage member 40 along the left-right direction so as to be arranged at predetermined intervals, and expand when heat is applied. So that the plurality of through-holes 65, 65... Are closed, a long rectangular plate-shaped thermal expansion material 10 that is long in the left-right direction is attached to the surface 42u on the back side of the lower surface 42a of the lower plate 42.
Although not shown, through holes are formed in the upper plate 41 forming the upper surface of the passage 45, the left plate 43 forming the left surface of the passage 45, and the right plate 44 forming the right surface of the passage 45 to receive heat. In such a case, the thermal expansion material 10 may be attached to the surface of the upper plate 41, the left plate 43, and the right plate 44 on the back side of the passage 45 so as to expand and close the through hole.
That is, the passage member 40 includes the plates 41 to 44 forming the passage 45, the through holes are formed in at least one of the plates 41 to 44 forming the passage 45, and the thermal expansion material 10 receives heat. In such a case, the structure may be attached to the rear surface of the passage 45 so as to expand and block the through hole.
According to the door 1 according to the second embodiment, similarly to the first embodiment, the thermal expansion material 10 receives heat and expands during a fire, thereby closing the gap between the inlet 5 and the opening/closing door 31. As a result, it is possible to provide the door 1 which has an excellent fire and smoke prevention function and a simple structure and is inexpensive.

The thermal expansion material 10 expands when it receives heat at a position other than the lower surface, left surface, and right surface of the passage 45 where postal matter or the like entering the passage 45 through the inlet 5 may collide. Then, as long as it is a position where the gap between the entrance 5 and the opening/closing door 31 can be closed, it does not matter where the passage structure 7 is provided.
For example, the thermal expansion material 10 may be attached to the rear surface of the opening/closing door 31 or the upper surface of the passage 45 (the lower surface of the upper plate 41).

In the present invention, the thermal expansion material 10 is applied to the periphery of the rotation center axis 38, the surface of the lower side of the lower plate 42 of the passage 45 (the lower surface of the lower plate 42) and the surface of the upper side of the upper plate 41 of the passage 45 described above ( Of the upper surface of the upper plate 41), the rear surface of the left plate 43 of the passage 45, the rear surface of the right plate 44 of the passage 45, the rear surface of the opening/closing door 31, the upper surface of the passage 45 (the lower surface of the upper plate 41), It may be configured to be provided at any one location or at a plurality of locations.
That is, the thermal expansion material 10 that expands when it receives heat may be provided in the passage structure 7.

Moreover, although the entrance door 1 as a fitting has been illustrated above, the present invention is also applicable to a door that opens and closes an opening located between one space and the other space in a building.
The present invention is also applicable to sliding doors, windows, etc. as fittings. For example, the above-mentioned entrance, exit, and passage structure may be provided in a part of the sliding door or a part of the window.
That is, a fitting having an opening/closing function provided in an opening of a building, the entrance being provided on one face plate of the fitting, the exit being provided on the other face plate of the fitting, and a passage configuration connecting the entrance and the exit A body, the passage forming body includes a passage member that forms a passage that connects the inlet and the outlet, a rotation center axis, and an opening/closing door that opens and closes the entrance by rotating about the rotation center axis. It is only necessary that the thermal expansion material that expands when receiving heat is a fitting provided in the passage structure.

1 door (fixture), 2 outdoor (one space), 3 indoor (other space), 4 opening,
5 inlet, 6 outlet, 7 passage structure, 10 thermal expansion material,
11 front plate (one face plate), 12 back plate (other face plate), 31 open/close door,
38 rotation center axis, 40 passage member, 45 passage, 65 through hole.

Claims (3)

In a fitting that opens and closes an opening located between one space and the other space,
An inlet provided on one face plate of the door, an outlet provided on the other face plate of the door, and a passage structure connecting the inlet and the outlet,
The passage structure includes a passage member that forms a passage that connects the inlet and the outlet, a rotation center axis, and an opening/closing door that rotates about the rotation center axis to open and close the inlet,
A fitting, wherein a thermal expansion material that expands when receiving heat is provided in the passage structure. The fitting according to claim 1, wherein the thermal expansion material is provided around the rotation center axis. The passage member includes a plate forming a passage,
Through holes are formed in the plate forming the passage,
The fitting according to claim 1, wherein the thermal expansion material is attached to the back surface of the passage so as to close the through hole.

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