JP7573982B2 - Fire door - Google Patents

Description

The present invention relates to a fire door.

Fire doors are known that are installed in buildings such as commercial facilities and hospitals. For example, the fire door described in Patent Document 1 includes a door that moves across the width of the building, a drive unit that drives the door, a control unit that controls the drive unit, and a horizontal frame that houses the drive unit and the control unit.

In the fire door of Patent Document 1, the drive unit and the control unit are individually enclosed in a housing made of steel plate and sealed. The housing is wrapped with a thermally expandable non-flammable sealing material.

Japanese Patent Application Publication No. 6-26265

However, in the fire door described in the above-mentioned Patent Document 1, there is a risk that flames will erupt from the horizontal frame when the control unit ignites due to heat during a fire.
The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a fire door that extends the time until flames erupt when a control unit ignites due to heating.

A fire door that solves the above problem includes a drive unit that drives the door, a control unit that controls the drive unit, and a case that houses the drive unit and the control unit and has an opening, and the control unit is positioned farther away than the drive unit when the position of the opening is used as a reference.

According to the above configuration, the control unit, which is expected to ignite when heated, is located above the drive unit in the case, and the drive unit is located below the control unit in the case. This makes it possible to increase the distance from the bottom of the case, where the opening is provided, to the control unit, thereby lengthening the time until flames erupt from the opening in the case when the control unit ignites when heated.

In the above fire door, it is preferable that a heat insulating material is disposed between the control unit and the drive unit.
In the above fire door, it is preferable that a heat insulating material is disposed between the control unit and a side wall of the case along the opening and closing direction of the door.

In the above fire door, it is preferable that a part of the control unit is covered with a heat insulating material.
In the above-mentioned fire door, it is preferable that the control unit and the drive unit are connected by wiring, the control unit is housed in a storage member having a hole through which the wiring passes, and a foaming material that expands when exposed to heat is installed around the hole.

In the above fire door, it is preferable that the storage member has a tubular portion through which the wiring passes, a base end of the tubular portion being connected to the hole of the storage member, and a tip end of the tubular portion being located lower than the drive portion.
It is preferable that the above fire door further comprises a battery that supplies power to the drive unit, the battery being housed in the case and positioned farther away from the drive unit when the position of the opening is taken as a reference.

The present invention makes it possible to extend the time until a flame erupts when the control unit ignites due to heating.

FIG. 2 is a front view showing the schematic configuration of a fire door. 2 is a cross-sectional view of FIG. 1 taken along line 2-2, showing the internal structure of the fire door case. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, showing a modified example of the internal structure of the fire door case.

Below, one embodiment of a fire door will be described with reference to Figures 1 and 2. In Figure 2, the foam material is shown by shading for convenience. As shown in Figure 1, the fire door 1 is a sliding fire door.

As shown in FIG. 1, the fire door 1 is provided in a rectangular frontage 200 formed in a building. The fire door 1 has a pair of vertical frames 3 spaced apart in the longitudinal direction of the frontage 200. The fire door 1 has a case 40 that is disposed above the pair of vertical frames 3 and supported by the pair of vertical frames 3. The vertical frames 3 are hollow and extend in the height direction of the fire door 1. An accommodation space 41 is formed inside the case 40. The fire door 1 is made of stainless steel. For this reason, the fire door 1 is resistant to rust.

Between the pair of vertical frames 3, two fixed parts 10 are provided, which are connected to the respective vertical frames 3. The two fixed parts 10 are arranged apart from each other to form an entrance between the two fixed parts 10. Between the two fixed parts 10, a first sliding door 20A and a second sliding door 20B are provided, which move along the direction in which the two fixed parts 10 are arranged. As shown in FIG. 2, the first sliding door 20A and the second sliding door 20B are arranged closer to the front than the fixed part 10 in the front-rear direction of the fire door 1. The first sliding door 20A and the second sliding door 20B move to open and close the entrance between the two fixed parts 10. Note that sliding doors such as the first sliding door 20A and the second sliding door 20B are an example of a door, and the fire door 1 may be provided with a hinged door or a folding door instead of a sliding door.

The fixed part 10 comprises a hollow mullion 11 extending in the height direction, a baseboard 12, and heat-resistant glass 13. The baseboard 12 is disposed between the mullion 11 and the vertical frame 3, and extends in the opening and closing direction of the first sliding door 20A and the second sliding door 20B. The heat-resistant glass 13 is supported by the baseboard 12, the vertical frame 3, the mullion 11, and the baseboard 12.

The first sliding door 20A comprises a heat-resistant glass 21, a leading edge vertical frame 22 supporting one side of the heat-resistant glass 21, a trailing edge vertical frame 23 supporting the other side of the heat-resistant glass 21, an upper frame 24 supporting the upper part of the heat-resistant glass 21, and a lower frame 25 supporting the lower part of the heat-resistant glass 21. The first sliding door 20A is hung from a running rail 100 (see FIG. 2) arranged in the storage space 41 of the case 40 via a first door hanger 110 having a door wheel, and is supported by the first door hanger 110 so as to be slidable in the driving direction. The second sliding door 20B has a similar configuration. The door hanger from which the second sliding door 20B is hung is called the second door hanger 120.

In the storage space 41 of the case 40, a drive unit 30 that drives the first sliding door 20A and the second sliding door 20B, and a control unit 35 that controls the drive unit 30 are arranged. The drive unit 30 moves the first sliding door 20A and the second sliding door 20B in the drive direction, and the first sliding door 20A and the second sliding door 20B approach and move away from each other to open and close the entrance between the two fixed parts 10. The case 40 corresponds to a case that houses the drive unit 30.

The storage space 41 of the case 40 contains a sensor controller 36 that controls the various sensors installed in the fire door 1, a touch switch receiver 37 that receives signals from a touch switch (not shown) that performs the opening operation, and a battery 38 that supplies power.

The drive unit 30 includes an electric motor 31, a drive sprocket 32 connected to the output shaft of the electric motor 31 via a reducer (not shown), and a driven sprocket 33 spaced apart from the drive sprocket 32 in the driving direction. The drive unit 30 includes a chain 34 wound around the drive sprocket 32 and the driven sprocket 33. The control unit 35 controls the electric motor 31.

The chain 34 has a first part 34A and a second part 34B that move in different directions. The first part 34A and the upper frame 24 of the first sliding door 20A are connected via a first door hanger 110. The second part 34B and the upper frame 24 of the second sliding door 20B are connected via a second door hanger 120. The driving force of the electric motor 31 is transmitted to the first door hanger 110 and the second door hanger 120 via the chain 34, thereby opening and closing the first sliding door 20A and the second sliding door 20B. In addition to the drive unit 30, an automatic closing device (not shown) is arranged inside the case 40 to move the first sliding door 20A and the second sliding door 20B in the closing direction when a fire is detected in the building in which the fire door 1 is installed.

The internal structure of the case 40 will be described with reference to FIG.
As shown in FIG. 2, the case 40 is formed in a box shape with an opening on the front side. In detail, the case 40 has a rear wall 42 constituting the rear side of the case 40, a bottom wall 43 constituting the lower surface of the case 40, an upper wall 44 constituting the upper surface of the case 40, and a side wall 45 constituting the longitudinal end surface of the case 40. The bottom wall 43 and the rear wall 42 are continuous, and the rear wall 42 and the upper wall 44 are continuous. The bottom wall 43 extends to the second sliding door 20B (first sliding door 20A). The front end of the bottom wall 43 is bent upward. The upper wall 44 extends to the front side beyond the second sliding door 20B. An upper fixed wall 44A extending downward is formed at the front end of the upper wall 44. The upper wall 44 is in contact with a ceiling (not shown). The rear wall 42 corresponds to a side wall along the opening and closing direction of the door. Between the upper fixed wall 44A and the inspection cover 48, a portion where there is no hinge 47 forms a second space S2. Therefore, the portion between the upper fixed wall 44A and the inspection cover 48 corresponds to a communication portion between the inside and the outside of the case 40.

An inspection cover 48 is attached to the upper fixed wall 44A of the case 40 via a hinge 47 so that the opening 40A of the case 40 can be opened and closed. The inspection cover 48 corresponds to the front wall and corresponds to a side wall along the opening and closing direction of the door. Furthermore, between the front end of the bottom wall 43 and the inspection cover 48, a lower opening 40B is formed where the upper ends of the first sliding door 20A and the second sliding door 20B are located.

A flat bar 60 for mounting the drive unit 30 and control unit 35 is provided on the rear side of the storage space 41 of the case 40. The flat bar 60 is fixed between the top wall 44 and the bottom wall 43 by welding. A plurality of flat bars 60 are arranged in the storage space 41 at predetermined intervals when viewed from the front side. A first mounting base 49 for mounting the drive unit 30 and a second mounting base 61 for mounting the control unit 35 are fixed to the flat bar 60 from the front side by mounting bolts.

The first mounting base 49 and the second mounting base 61 are long objects extending in the direction in which the first sliding door 20A and the second sliding door 20B move. The first mounting base 49 and the second mounting base 61 are formed of, for example, extruded aluminum material to facilitate the installation and removal of parts. The first mounting base 49 includes a support portion 49A to which the drive unit 30 is attached, a rail portion 49C on which the running rail 100 is formed, and a connecting portion 49B that connects the support portion 49A and the rail portion 49C. The second mounting base 61 includes a support portion 61A to which the control unit 35 is attached. The control unit 35 is located farther away than the drive unit 30 when the position of the bottom opening 40B is used as a reference.

The electric motor 31 of the drive unit 30 is attached to the support portion 49A of the first mounting base 49. The electric motor 31 is connected to a drive sprocket 32 via a reduction gear (not shown). That is, a running rail 100 that suspends the second door hanger 120 of the second sliding door 20B is provided in the storage space 41 of the case 40, and the drive unit 30 is located above the running rail 100.

In addition, a first insulating plate 62 is arranged on the back of the second mounting base 61 as an insulating material and is sandwiched between the flat bar 60 and the second mounting base 61. For example, a calcium silicate board is used as the first insulating plate 62. Therefore, the first insulating plate 62 can block the heat transmitted from the back wall 42 from being transmitted to the second mounting base 61, and suppress the heat from being transmitted to the control unit 35. For example, when the second mounting base 61 is formed of an aluminum extrusion material, the heat transfer efficiency is high, but the first insulating plate 62 delays the transfer of heat to the second mounting base, so that the transfer of heat to the control unit 35 can be suppressed. In addition, the control unit 35 is covered by the cover 64 including the second mounting base 61 and the first insulating plate 62. A lid portion 64A is screwed to the inspection cover 48 side, which is the front side of the cover 64. Note that the cover 64 corresponds to a housing member that houses the control unit 35.

The drive unit 30 is located below the cover 64. In other words, the control unit 35 is located above the drive unit 30. In other words, the control unit 35 is located farther away than the drive unit 30 when the position of the bottom opening 40B is used as a reference.

The sensor controller 36, touch switch receiver 37, and battery 38 shown in FIG. 1 are attached to the second mounting base 61 together with the control unit 35, and these devices that are expected to ignite when heated are housed in the cover 64. In other words, the control unit 35, sensor controller 36, touch switch receiver 37, and battery 38, which contain a large amount of resin such as circuit boards and electronic components, are located farther away than the drive unit 30 when the position of the bottom opening 40B is used as the reference point.

Between the control unit 35 and the drive unit 30, a second insulating plate 65 is provided as a heat insulating material. For example, a calcium silicate board is used as the second insulating plate 65. The second insulating plate 65 is provided on the lower inner wall of the cover 64. Therefore, when the drive unit 30 ignites, the heat from the drive unit 30 is blocked, and the heat transfer to the control unit 35 is suppressed. The second insulating plate 65 is arranged along the longitudinal direction of the cover 64 below the sensor controller 36, the touch switch receiver 37, and the battery 38, and simultaneously suppresses the transfer of heat from the storage space 41 to each device.

The lower wall 64B of the cover 64 has a hole 66A through which the wiring 35A passes. The hole 66A penetrates the lower wall 64B of the cover 64 and the second insulating plate 65. The control unit 35 and the drive unit 30 are connected by the wiring 35A. The wiring 35A includes a power supply line and a signal line. The lower wall 64B of the cover 64 has a tube 66 through which the wiring 35A passes. The base end of the tube 66 is connected to the hole 66A of the cover 64. The tip of the tube 66 is located below the bottom surface of the drive unit 30. This prevents flames extending upward from the drive unit 30 from penetrating the tube 66.

A fifth foaming material 55 that foams when heated is placed around the hole 66A. A graphite-based foaming material is used for the fifth foaming material 55. In other words, the fifth foaming material 55 is attached to the inner wall of the lower wall 64B of the cover 64 around the hole 66A.

The fifth foaming material 55 foams when the rear wall 42 is heated by the flame and the heat is transmitted to the inside of the cover 64. When the fifth foaming material 55 foams, it fills the periphery of the hole 66A and the hole 66A. This makes it possible to prevent flames from penetrating into the inside of the cover 64 through the hole 66A. This makes it possible to extend the time until the control unit 35 housed in the cover 64 ignites.

The case 40 of the fire door 1 is provided with a foaming material that expands when heated to expel air from the storage space 41 of the case 40 to the outside of the case 40, so that the drive unit 30 does not ignite within the specified time required for certification of fire resistance in the event of a fire.

The bottom wall 43 is fitted with a protrusion 43A that protrudes from the bottom wall 43 toward the storage space 41. The protrusion 43A extends in the direction in which the first sliding door 20A and the second sliding door 20B move. The protrusion 43A of the bottom wall 43 is provided with a first foaming material 51 that foams when heated. A graphite-based foaming material is used as the first foaming material 51. That is, the first foaming material 51 is attached to the surface of the protrusion 43A of the bottom wall 43 that faces the second sliding door 20B (first sliding door 20A). The first foaming material 51 is attached over the range in which the drive unit 30 including the control unit 35 is located in the direction in which the first sliding door 20A and the second sliding door 20B move.

When the rear wall 42 or the bottom wall 43 is heated by a flame, the first foaming material 51 foams due to heat transfer from the rear wall 42 to the bottom wall 43 or through the bottom wall 43. When the first foaming material 51 foams, it fills the first space S1 between the protrusion 43A and the second sliding door 20B (first sliding door 20A). This prevents heat from entering the inside of the storage space 41 of the case 40 from the rear side, and prevents each device of the drive unit 30 from igniting. In addition, if a fire breaks out on the front side, the inside of the storage space 41 of the case 40 is heated, and the first foaming material 51 foams due to the heat of the internal space, filling the first space S1 and preventing the flames of each device of the ignited drive unit 30 from erupting from the first space S1 to the rear side.

The upper fixed wall 44A of the case 40 is provided with a second foaming material 52 that foams when heated. A graphite-based foaming material is used for the second foaming material 52. That is, the second foaming material 52 is attached over the entire range in the direction in which the first sliding door 20A and the second sliding door 20B move, in other words, over the range in which the inspection cover 48 is located. The second foaming material 52 is provided in the case 40 except for the bottom opening 40B inside the case 40.

The second foaming material 52 foams as the rear wall 42 or bottom wall 43 continues to be heated by the flame and the heat within the storage space 41 is transferred to it. When the second foaming material 52 foams, it fills the second space S2 between the upper fixed wall 44A and the inspection cover 48. This prevents heat from entering the storage space 41 of the case 40, and prevents the devices in the drive unit 30 from catching fire. It also prevents flames from devices that ignite within the storage space 41 of the case 40 from escaping from the second space S2 into the space on the front side.

The third foaming material 53, which foams when heated, is provided on the connecting portion 49B of the first mounting base 49. A graphite-based foaming material is used for the third foaming material 53. That is, the third foaming material 53 is attached to the surface of the connecting portion 49B of the first mounting base 49 opposite the surface that contacts the rear wall 42. The third foaming material 53 is attached over an area in which the drive unit 30 including the control unit 35 is located in the direction in which the first sliding door 20A and the second sliding door 20B move. The third foaming material 53 is provided in an area other than the bottom opening 40B inside the case 40.

When the rear wall 42 is heated by the flame, the third foaming material 53 foams as heat is transferred through the rear wall 42 and the connecting portion 49B. When the third foaming material 53 foams, it fills the third space S3 below the drive unit 30 in the storage space 41 of the case 40 and covers the wiring. This prevents the wiring from catching fire, and ultimately the devices in the drive unit 30 from catching fire.

A fourth foaming material 54 that foams when heated is provided on the inner surface of the inspection cover 48. A graphite-based foaming material is used for the fourth foaming material 54. That is, the fourth foaming material 54 is attached over the entire range in the direction in which the first sliding door 20A and the second sliding door 20B move, in other words, over the range in which the inspection cover 48 is located. The fourth foaming material 54 is provided in the case 40 except for the bottom opening 40B inside the case 40.

When the inspection cover 48, which is the front wall, is heated by a flame, the heat is transferred through the inspection cover 48, which is the front wall, and the fourth foaming material 54 foams. When the fourth foaming material 54 foams, it fills at least the fourth space S4 between the cover 64 of the control unit 35 and the inspection cover 48, and the fifth space S5 between the drive unit 30 and the inspection cover 48, and also fills up to the sixth space S6 between the first door hanger 110 and the second door hanger 120 and the inspection cover 48. This suppresses the temperature rise in the storage space 41 of the case 40, and suppresses the ignition of each device of the drive unit 30. In addition, the amount of air (oxygen) in the storage space 41 of the case 40 is reduced, suppressing the ignition of each device of the drive unit 30.

Next, the operation of the fire door 1 will be described with reference to FIG.
As shown in FIG. 2, when a fire breaks out in a space behind a fire door 1 installed in a building, a rear wall 42 and a bottom wall 43 of the fire door 1 are heated by flames and hot air.

When the rear wall 42 is heated, the heat is transferred to the first mounting base 49 on which the drive unit 30 is attached, and the drive unit 30 is heated. The rear side of the second mounting base 61 on which the control unit 35, the sensor controller 36, the touch switch receiver 37, and the battery 38 are attached is heated, but the first insulating plate 62 prevents the heat from being transferred, so the time until each device ignites can be delayed. Note that the flat bar 60 is heated and heat is transferred from the mounting bolt to the second mounting base 61, but the contact area is small, so the amount of heat transfer is small and the heat transfer to the second mounting base 61 is suppressed. In addition, when the bottom wall 43 is heated by the flame, the first foam material 51 foams and fills the first space S1, suppressing the intrusion of heat from the rear side into the inside of the storage space 41 of the case 40.

If the rear wall 42 continues to heat further, the drive unit 30 will ignite. The heat from the drive unit 30 is blocked by the second insulating plate 65 provided on the bottom wall 64B of the cover 64, so the heat is prevented from being transmitted to the control unit 35. In addition, if a flame attempts to penetrate through the tube portion 66 through which the wiring 35A of the drive unit 30 passes, the fifth foaming material 55 foams and blocks the upper end of the tube portion 66, preventing the flame from penetrating into the cover 64. This makes it possible to delay the ignition of the control unit 35.

If the fire progresses and continues to overheat, the control unit 35 will ignite. When the position of the bottom opening 40B is used as a reference, the control unit 35 is located farther away than the drive unit 30, so the time until the flame of the control unit 35 erupts from the bottom opening 40B of the case 40 can be extended. In addition, the second foaming material 52 foams due to the heat in the storage space 41 and fills the second space S2, preventing the flame of the control unit 35 from erupting from the second space S2 to the front side.

Similar to the control unit 35, the sensor controller 36, touch switch receiver 37, and battery 38 also ignite, but because each device is located far away from the bottom opening 40B of the case 40 and the bottom opening 40B is blocked by the second sliding door 20B in the closed position, the flames of each device are prevented from escaping from the bottom opening 40B.

When the bottom wall 43 is heated, heat is transferred through the bottom wall 43 to the first foaming material 51, causing the first foaming material 51 to foam and fill the first space S1 between the protrusion 43A and the second sliding door 20B and the first sliding door 20A.

Furthermore, when heat is transferred to the second foam material 52 and the fourth foam material 54 through the storage space 41 of the case 40, the second foam material 52 and the fourth foam material 54 foam and spread into the storage space 41 of the case 40. That is, the fourth foam material 54 fills the fourth space S4 between the cover 64 and the inspection cover 48, fills the fifth space S5 between the drive unit 30 and the inspection cover 48, and fills the sixth space S6 between the first door hanger 110 and the second door hanger 120 and the inspection cover 48. The second foam material 52 also fills the second space S2 between the upper fixed wall 44A and the inspection cover 48.

Therefore, by filling the storage space 41 of the case 40 with foam material, the amount of air (oxygen) in the storage space 41 of the case 40 is reduced, and the temperature rise in the storage space 41 of the case 40 is suppressed, thereby preventing the ignition of each device of the drive unit 30.

Next, when a fire breaks out in the space in front of the fire door 1 installed in a building, the inspection cover 48 and upper fixed wall 44A, which are the front walls of the fire door 1, are heated by the flames and hot air.
When the upper fixed wall 44A is heated, the heat is transferred to the second foam material 52, causing the second foam material 52 to foam and spread into the accommodation space 41 of the case 40. That is, the second foam material 52 fills the second space S2 between the upper fixed wall 44A and the inspection cover 48.

When the inspection cover 48 is heated and the heat is transferred to the fourth foaming material 54, the fourth foaming material 54 foams and spreads into the storage space 41 of the case 40. That is, the fourth foaming material 54 fills the fourth space S4 between the cover 64 and the inspection cover 48, fills the fifth space S5 between the drive unit 30 and the inspection cover 48, and fills the sixth space S6 between the first door hanger 110 and the second door hanger 120 and the inspection cover 48. The fourth foaming material 54 can also block the wiring hole (not shown) as a communication part that draws wiring from the start-up sensor (not shown) installed in the inspection cover 48 of the case 40 into the inside of the case 40. Therefore, it is possible to suppress the flame from entering the inside of the case 40 through the wiring hole from the outside of the case 40, and there is no need to provide a separate foaming material to block the wiring hole.

Furthermore, when heat is transferred to the first foam material 51 and the third foam material 53 through the storage space 41 of the case 40, the first foam material 51 and the third foam material 53 foam and fill the storage space 41 of the case 40. That is, the first foam material 51 fills the first space S1 between the protrusion portion 43A and the second sliding door 20B and the first sliding door 20A. The third foam material 53 fills the third space S3 below the drive unit 30 in the storage space 41 of the case 40.

Therefore, by filling the storage space 41 of the case 40 with foam material, the amount of air (oxygen) in the storage space 41 of the case 40 is reduced, and the temperature rise in the storage space 41 of the case 40 is suppressed, thereby preventing the ignition of each device of the drive unit 30.

Next, the effects of this embodiment will be described.
(1) The control unit 35, which is expected to ignite when heated, is disposed above the drive unit 30 in the case 40, and the drive unit 30 is positioned below the control unit 35 in the case 40. This makes it possible to increase the distance from the lower part of the case 40, where the bottom openings 40B of the first sliding door 20A and the second sliding door 20B are provided, to the control unit 35, thereby lengthening the time until a flame erupts from the bottom opening 40B of the case 40 when the control unit 35 ignites when heated.

(2) A second insulating plate 65 is disposed between the control unit 35 and the drive unit 30. This makes it possible to suppress the transfer of heat from the drive unit 30 to the control unit 35, thereby extending the time until the control unit 35 ignites in the event of a fire.

(3) A first insulating plate 62 is disposed between the second mounting base 61 and the flat bar 60 along the opening and closing direction of the first sliding door 20A and the second sliding door 20B. Therefore, even if the case 40 is heated, the transfer of heat to the back surface of the control unit 35 can be suppressed, and the temperature around the control unit 35 can be prevented from rising.

(4) A portion of the control unit 35 is covered with the first insulating plate 62 and the second insulating plate 65. This makes it possible to suppress the transfer of heat from the surroundings of the control unit 35 to the control unit 35, thereby extending the time until the control unit 35 ignites in the event of a fire.

(5) The control unit 35, the sensor controller 36, the touch switch receiver 37, and the battery 38, which contain a larger amount of resin than the drive unit 30, are positioned farther away from the bottom opening 40B of the case 40. This can extend the time it takes for flames to erupt from the bottom opening 40B of the case 40 when the devices ignite due to heating.

(6) By inserting the wiring 35A connected to the control unit 35 into the cover 64, it is possible to prevent heat and flames from being directly transmitted to the wiring 35A from the outside of the cover 64. In addition, when a fire breaks out around the fire door 1 and heats up, the fifth foam material 55 is heated and expands, and the expansion of the fifth foam material 55 fills the hole 66A of the cover 64, thereby preventing flames from penetrating into the cover 64 through the hole 66A. This makes it possible to extend the time until the control unit 35 housed in the case 40 ignites.

(7) By inserting the wiring 35A connected to the control unit 35 into the tubular portion 66, it is possible to prevent heat and flame from being directly transmitted to the wiring 35A from the outside of the tubular portion 66, and also to prevent flame from entering the tubular portion 66 when the drive unit 30 ignites, thereby preventing flame from penetrating from the tubular portion 66 into the inside of the cover 64. This makes it possible to extend the time until the control unit 35 housed in the case 40 ignites.

(8) The battery 38, which is expected to ignite when heated, is positioned higher inside the case 40 than the drive unit 30, and the drive unit 30 is positioned lower inside the case 40 than the battery 38. This makes it possible to lengthen the distance from the bottom of the case 40, where the bottom openings 40B of the first sliding door 20A and the second sliding door 20B are provided, to the battery 38, thereby lengthening the time until flames erupt from the bottom openings 40B of the case 40 when the battery 38 ignites when heated.

(9) When the case 40 housing the drive unit 30 is exposed to a fire, the heat of the fire causes the foaming material to foam, expelling the air inside the case 40 to the outside of the case 40, thereby reducing the amount of oxygen used to burn the drive unit 30. This can extend the time until the drive unit 30 ignites in the event of a fire.

Other Embodiments
The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

- In the above embodiment, as an example of locating the control unit 35 at a position farther away from the drive unit 30 with respect to the bottom opening 40B, the control unit 35 is located on the second mounting base 61 above the second sliding door 20B and the fixed unit 10 located on the right side when viewed from the front. However, a cover 64 including a first insulating plate 62 and a second insulating plate 65 may be provided on the second mounting base 61 above the first sliding door 20A and the fixed unit 10 located on the left side when viewed from the front, and the control unit 35 may be located inside the cover 64. In this way, the control unit 35 is not directly exposed to the flames of the drive unit 30, and the time until the control unit 35 ignites can be extended.

- In the above embodiment, the first mounting base 49 on which the drive unit 30 is mounted and the second mounting base 61 on which the control unit 35 is mounted are arranged in two tiers. However, a new mounting base may be installed above the second mounting base 61, and the control unit 35 may be arranged on a part of this mounting base located above the second sliding door 20B. In this way, there is no risk of the control unit 35 being directly exposed to the flames of the drive unit 30, and the time until the control unit 35 ignites can be extended.

- In the above embodiment, the wiring hole through which the wiring of the activation sensor is pulled into the inside of the case 40 is the communication part, but the wiring hole through which the wiring of a device other than the activation sensor is pulled may also be the communication part.

- In the above embodiment, the tip of the tube portion 66 is positioned below the bottom surface of the drive unit 30, but the tip of the tube portion 66 may be positioned below the top surface of the drive unit 30. In this way, it is possible to prevent flames extending upward from the top surface of the drive unit 30 from penetrating the tube portion 66.

In the above configuration, the cylindrical portion 66 may be omitted.
In the above embodiment, the battery 38 is housed in the cover 64. However, the battery 38 does not have to be housed in the cover 64.

In the above embodiment, calcium silicate boards were used for the first insulating board 62 and the second insulating board 65, but other insulating materials such as gypsum boards may also be used for the first insulating board 62 and the second insulating board 65.

In the above configuration, the first heat insulating plate 62 provided on the rear surface of the control unit 35 may be omitted.
In the above configuration, the second insulating plate 65 provided between the control unit 35 and the drive unit 30 may be omitted.

- In the above configuration, as shown in FIG. 3, a seventh foaming material 57 that foams by heat may be provided in the sixth space S6, which is the space between the rear wall 42 and the flat bar 60. A graphite-based foaming material is used for the seventh foaming material 57. That is, the seventh foaming material 57 is attached to the surface of the sixth space S6 on the rear wall 42 side. The seventh foaming material 57 is attached over the range of movement of the second sliding door 20B in the direction in which the second sliding door 20B moves. When the rear wall 42 is heated by a flame, the seventh foaming material 57 foams by heat transferred through the rear wall 42. When the seventh foaming material 57 foams, it fills the seventh space S7 and overflows from the seventh space S7 to fill the storage space 41 of the case 40. This suppresses the temperature rise of the storage space 41 of the case 40 and suppresses the ignition of each device of the drive unit 30. In addition, the amount of air (oxygen) in the storage space 41 of the case 40 is reduced to suppress the ignition of each device of the drive unit 30. The seventh foam material 57 may be attached over the entire range in the direction in which the first sliding door 20A and the second sliding door 20B move.

In the above configuration, as shown in FIG. 3, the drive unit 30 suppresses the transfer of heat from the support unit 49A to the drive unit 30 by the eighth space S8 formed between the support unit 49A of the first mounting base 49 and the drive unit 30. The seventh space S7 may be provided with an eighth foaming material 58 that foams with heat. The eighth foaming material 58 is a graphite-based foaming material. That is, the eighth foaming material 58 is attached to the surface of the support unit 49A of the first mounting base 49 opposite to the surface that contacts the rear wall 42. The eighth foaming material 58 is attached over a range in which the drive unit 30 including the control unit 35 is located in the direction in which the first sliding door 20A and the second sliding door 20B move. When the rear wall 42 is heated by a flame, the eighth foaming material 58 foams by heat transfer via the rear wall 42 and the support unit 49A. When the eighth foaming material 58 foams, it fills the eighth space S8 and overflows from the support portion 49A of the first mounting base 49, filling the area around the drive unit 30 and the storage space 41 of the case 40. This suppresses the temperature rise in the storage space 41 of the case 40 and suppresses the ignition of each device of the drive unit 30. It also reduces the amount of air (oxygen) in the storage space 41 of the case 40 and suppresses the ignition of each device of the drive unit 30.

In the above embodiment, the first foam material 51 is provided on the protruding portion 43</b>A of the bottom wall 43 . However, a foam material may be provided on the inner side of the bottom wall 43 .
In the above configuration, a foam material may be provided on the upper wall 44. The foam material provided on the upper wall 44 foams due to heat transmitted from the rear wall 42 or the front wall, and can push air in the storage space 41 of the case 40 toward the bottom opening 40B.

In the above configuration, the fifth foaming material 55 may be omitted.
In the above configuration, the fourth foaming material 54 may be omitted.
In the above configuration, the third foam material 53 may be omitted.

In the above configuration, the second foam material 52 may be omitted.
In the above configuration, the first foaming material 51 may be omitted.
In the above configuration, the foam material is a graphite-based foam material. However, other foam materials such as an epoxy-based foam material or a butyl-based foam material may be used.

In the above embodiment, the entire upper end of the first sliding door 20A and the second sliding door 20B is located in the bottom opening 40B, but at least a portion of the upper end of the first sliding door 20A and the second sliding door 20B may be located in the bottom opening 40B.

In the above embodiment, the fire door 1 is made of stainless steel or aluminum. However, the fire door 1 may be made of other materials such as steel.
In the above embodiment, the fire door 1 is a sliding door. However, the fire door may be a single sliding door.

1...fire door, 3...vertical frame, 10...fixed wall, 11...moulder, 12...baseboard, 13...heat-resistant glass, 20A...first sliding door, 20B...second sliding door, 21...heat-resistant glass, 22...vertical frame at leading end of door, 23...vertical frame at trailing end of door, 24...upper frame, 25...lower frame, 30...drive unit, 31...electric motor, 32...drive sprocket, 33...driven sprocket, 34...chain, 34A...first part, 34B...second part, 35...control part, 35A...wiring, 36...sensor controller, 37...touch switch receiver, 38...battery, 40...case, 40A...front opening, 40B...bottom opening, 41...accommodation space, 42...rear wall, 43...bottom wall, 43A...projection portion, 44...upper wall, 44A...upper fixed wall, 45...side wall, 47...hinge, 48...inspection cover, 49...first mounting base, 49A...support portion, 49B...connecting portion, 49C...rail portion, 51...first foam material, 52...second foam material, 53...third foam material, 54...fourth foam material, 55...fifth foam material, 57...seventh foam material, 58...eighth foam material, 60...flat bar, 61...second mounting base, 62...first heat insulating board, 64...cover Bar, 64A...lid portion, 64B...bottom wall, 65...second insulation plate, 66...tubular portion, 66A...hole portion, 100...running rail, 110...first door hanger, 120...second door hanger, 200...frontage, S1...first space, S2...second space, S3...third space, S4...fourth space, S5...fifth space, S6...sixth space, S7...seventh space, S8...eighth space.

Claims (7)

A drive unit that drives the door;
A control unit that controls the drive unit;
a case that houses the drive unit and the control unit and has an opening,
The drive unit and the control unit are disposed vertically apart from each other in a height direction,
The control unit and the drive unit are connected by wiring,
The control unit is disposed at a position farther away than the drive unit when the position of the opening is taken as a reference, and is housed in a housing member having a hole portion below it through which the wiring passes.
Fire door. The fire door according to claim 1 , wherein a heat insulating material is disposed between the control unit and the drive unit. The fire door according to claim 2 , wherein a heat insulating material is disposed between the control unit and a side wall of the case along the opening and closing direction of the door. The fire door according to claim 1 , wherein a part of the control section is covered with a heat insulating material. The fire door according to claim 1, wherein a foaming material that expands when heated is provided around the hole. The fire door according to claim 5 , wherein the housing member includes a tubular portion through which the wiring passes, a base end of the tubular portion being connected to the hole of the housing member, and a tip end of the tubular portion being located lower than the drive portion. A battery is provided to supply power to the driving unit,
The fire door according to any one of claims 1 to 6, wherein the battery is housed in the case and is disposed at a position farther from the drive unit when the position of the opening is taken as a reference.