Fire door

Abstract

To provide a fire door that, in addition to blocking flames, also blocks smoke in the event of a fire.SOLUTION: A fire door 1 includes a sliding door 20 mounted to an opening, and a metal leaf springs 73, 81 for closing a space between the opening and the sliding door 20. The leaf spring 73 is provided on the entire surface in the width direction of the lower portion of a case 40 to close the space between an upper frame 27 of the sliding door 20 and a lower portion 40A of the case 40. The leaf spring 81 is provided on the entire surface in the width direction of a lower frame 28 of the sliding door 20 to close a space between the lower frame 28 of the sliding door 20 and a guide rail 11.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fire door.

Background Art

[0002] Fire doors installed in buildings are known. For example, the fire door described in Patent Document 1 includes a door that moves in an opening, 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. The opening is always closed by the door and the horizontal frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the fire door described in Patent Document 1, in addition to blocking flames during a fire, it is required to block smoke.

Means for Solving the Problems

[0005] The fire door that solves the above problems includes a door attached to an opening and a metal leaf spring that closes the space between the opening and the door. According to the above configuration, the fire door includes a metal leaf spring that closes the space between the opening and the door. Therefore, when a fire occurs, it is possible to suppress the flow of smoke from the side where the fire has occurred to the opposite side by the leaf spring. In addition, deformation of the leaf spring due to the heat of the fire is suppressed, and it is possible to prevent the smoke blocking function from failing.

[0006] The fire door described above preferably has a case that houses a drive mechanism for driving the door, and into which the upper end of the door enters through an opening at the bottom, and the leaf spring is provided across the entire widthwise surface of the lower part of the case, sealing the space between the upper end of the door and the lower part of the case.

[0007] The fire door described above is preferably provided with a guide rail that extends in the direction of movement of the door and guides the door, and the leaf spring is provided across the entire widthwise surface of the lower end of the door, closing the gap between the lower end of the door and the guide rail.

[0008] With respect to the above-mentioned fire door, it is preferable that the leaf spring is provided across the entire height of the door edge and closes the gap between the contact member that contacts the door edge and the door edge itself. The fire door described above preferably comprises a fixed wall provided in the opening, wherein when fully closed, the vertical frame at the door edge of the fixed wall and the vertical frame at the door end of the door face each other; a first smoke-stopping member provided on the entire surface in the height direction of the vertical frame at the door end of the door; a second smoke-stopping member provided on the entire surface in the height direction of the vertical frame at the door edge of the fixed wall; and a leaf spring, wherein one end of the first smoke-stopping member and the second smoke-stopping member is attached to the entire surface in the height direction of the vertical frame on the surface of the vertical frame facing the other end of the first smoke-stopping member and the second smoke-stopping member, thereby sealing the space between the first smoke-stopping member and the second smoke-stopping member. [Effects of the Invention]

[0009] According to the present invention, in addition to blocking flames, smoke can also be blocked during a fire. [Brief explanation of the drawing]

[0010] [Figure 1] This is a front view showing the configuration of one embodiment of a fire door. [Figure 2] This is a longitudinal cross-sectional view showing the configuration of the fire door in the same embodiment. [Figure 3] This is an enlarged vertical cross-sectional view of the upper part of the fire door of the same embodiment. [Figure 4] This is an enlarged vertical cross-sectional view of the lower part of the fire door of the same embodiment. [Figure 5] This is a cross-sectional view showing the configuration of the fire door in the same embodiment. [Figure 6] This is a cross-sectional view showing the door edge of the fire door in the fully closed state according to the same embodiment. [Figure 7] This is a cross-sectional view showing the end of a fire door in the fully closed state according to the same embodiment. [Modes for carrying out the invention]

[0011] An embodiment of a fire door will be described below with reference to Figures 1 to 7. The fire door is a sliding type. (Fire door 1)

[0012] As shown in Figure 1, the fire door 1 is installed in a rectangular opening 5 formed in the building. The fire door 1 comprises a pair of vertical frames 10 spaced apart in the longitudinal direction of the opening 5. The fire door 1 comprises a case 40 positioned above the pair of vertical frames 10 and supported by the pair of vertical frames 10. The case 40 corresponds to a transom. The vertical frames 10 are hollow and extend in the height direction of the fire door 1. The fire door 1 is made of stainless steel. Therefore, the fire door 1 is resistant to rust.

[0013] The fire door 1 comprises two fixed walls 30 and two sliding doors 20. The two fixed walls 30 consist of a first fixed wall 31 and a second fixed wall 32. The first fixed wall 31 and the second fixed wall 32 are spaced apart from each other between a pair of vertical frames 10 and are connected to each vertical frame 10. The first fixed wall 31 and the second fixed wall 32 form an entrance / exit between them. The case 40 houses a drive unit 41 for moving the sliding doors 20 and a control unit 42 for controlling the drive unit 41. The two sliding doors 20 consist of a first sliding door 21 and a second sliding door 22. The drive unit 41 moves the first sliding door 21 and the second sliding door 22 along the direction in which the two fixed walls 30 are aligned. The drive unit 41 corresponds to a drive mechanism.

[0014] As shown in FIG. 5, the first sliding door 21 and the second sliding door 22 are arranged on the front side of the fixed wall 30 rather than on the rear side in the front-rear direction of the fire door 1. The first sliding door 21 and the second sliding door 22 move to open and close the entrance between the first fixed wall 31 and the second fixed wall 32.

[0015] As shown in FIG. 1, the fixed wall 30 includes a middle upright 33 having a hollow shape extending in the height direction, a sill 34, and a glass plate 35. The sill 34 is disposed between the middle upright 33 and the vertical frame 10 and extends in the opening and closing direction of the first sliding door 21 and the second sliding door 22. The glass plate 35 is supported by the vertical frame 10, the middle upright 33, and the sill 34. The glass plate 35 is made of heat-resistant glass.

[0016] The first sliding door 21 includes a glass plate 23, a first leading-side vertical frame 24, a door-bottom-side vertical frame 26, an upper frame 27, and a lower frame 28. The first leading-side vertical frame 24 includes a first support member 24A that supports one side portion of the glass plate 23. The second sliding door 22 includes a glass plate 23, a second leading-side vertical frame 25, a door-bottom-side vertical frame 26, an upper frame 27, and a lower frame 28. The second leading-side vertical frame 25 includes a second support member 25A that supports one side portion of the glass plate 23. The door-bottom-side vertical frame 26 supports the other side portion of the glass plate 23. The upper frame 27 supports the upper portion of the glass plate 23. The lower frame 28 supports the lower portion of the glass plate 23. The glass plate 23 is made of heat-resistant glass.

[0017] The first sliding door 21 is suspended from a running rail 45 (see FIG. 2) disposed inside the case 40 via a first door hanger 43 having door wheels and is supported by the first door hanger 43 so as to be slidable in the driving direction. The second sliding door 22 is suspended from the running rail 45 disposed inside the case 40 via a second door hanger 44 having door wheels and is supported by the second door hanger 4, so as to be slidable in the driving direction.

[0018] (Gap structure between the upper frame 27 of the sliding door 20 and the lower portion 40A of the case 40) Next, referring to FIG. 3, the gap structure between the upper frame 27 of the sliding door 20 and the lower portion 40A of the case 40 will be described.

[0019] As shown in FIG. 3, an opening 40B into which the upper end of the sliding door 20 enters is provided in the lower part 40A of the case 40. A smoke stop structure 70 is provided in the gap between the upper frame 27 of the sliding door 20 and the opening 40B of the case 40. The upper frame 27 of the sliding door 20 and the opening 40B of the case 40 always face each other. The smoke stop structure 70 of the sliding door 20 includes a case-side smoke stop member 71, a sliding door-side smoke stop member 72, and a leaf spring 73. The case-side smoke stop member 71 is provided on the front side and the back side of the opening 40B of the case 40 and is provided on the entire surface of the case 40 in the longitudinal direction. The sliding door-side smoke stop member 72 extends from the upper end of the upper frame 27 and is provided on the front side and the back side and is provided on the entire surface of the upper frame 27 in the longitudinal direction. The case-side smoke stop member 71 and the sliding door-side smoke stop member 72 are L-shaped members when viewed from the longitudinal section and are integrally formed with the case 40.

[0020] The leaf spring 73 is a metal plate having brush-shaped feet 73B. The leaf spring 73 is provided on the entire surface of the case 40 in the longitudinal direction. The fixing portion 73A of the leaf spring 73 is fixed to the inner wall of the case 40. The feet 73B of the leaf spring 73 contact the sliding door-side smoke stop member 72 and close the gap between the inner wall of the case 40 and the sliding door-side smoke stop member 72. Although the feet 73B of the leaf spring 73 are in contact with the sliding door-side smoke stop member 72, they have elasticity and do not interfere with the operation of the sliding door 20.

[0021] (Gap structure between the lower frame 28 of the sliding door 20 and the guide rail 11) Next, referring to FIG. 4, the gap structure between the lower frame 28 of the sliding door 20 and the guide rail 11 will be described.

[0022] As shown in Figure 4, a joint structure 80 is provided in the gap between the bottom frame 28 and the guide rail 11 of the sliding door 20. Specifically, a guide member 29 fixed to the bottom frame 28 is fitted into a groove 11A provided in the guide rail 11. The guide member 29 is guided into the groove 11A of the guide rail 11, which extends in the direction of movement of the sliding door 20. A leaf spring 81 is provided at the lower end of the bottom frame 28. The leaf spring 81 is a metal plate with brush-shaped feet 81B. The leaf spring 81 is provided across the entire longitudinal surface of the bottom frame 28. The fixing part 81A of the leaf spring 81 is fixed to the lower part of the bottom frame 28. The feet 81B of the leaf spring 81 seal the gap by contacting the surface of the guide rail 11. Since the feet 81B of the leaf spring 81 are elastic, they do not hinder the operation of the sliding door 20.

[0023] (Gap structure at the door edge 20A of sliding door 20) Next, with reference to Figures 5 and 6, the gap structure at the door edge 20A of the sliding door 20 will be described. As shown in Figure 5, when fully closed, the first door edge 21A of the first sliding door 21 and the second door edge 22A of the second sliding door 22 come into contact.

[0024] As shown in Figure 6, a joint structure 50 is provided at the contact point between the first door edge 21A of the first sliding door 21 and the second door edge 22A of the second sliding door 22. Specifically, multiple barrier members 51 are provided on the first door edge side vertical frame 24, extending over the entire height of the first door edge side vertical frame 24. The barrier members 51 are provided at both ends, spaced apart in the thickness direction of the first door edge 21A. A protrusion 53 is provided on the second door edge side vertical frame 25, extending over the entire height of the second door edge side vertical frame 25. The protrusion 53 is located in the center of the thickness direction of the second door edge 22A. When the sliding door 20 is fully closed, the protrusion 53 of the second door edge 22A fits between the multiple barrier members 51 of the first door edge 21A. The second sliding door 22 corresponds to the contact member.

[0025] A leaf spring 58 is provided on the first door-side vertical frame 24. The leaf spring 58 is a metal plate having brush-shaped feet 58B. The leaf spring 58 is provided across the entire height of the first door-side vertical frame 24 between the surface 24B of the first support member 24A facing the second sliding door 22 and the protrusion 53. The fixing portion 58A of the leaf spring 58 is fixed to the surface 24B. The feet 58B of the leaf spring 58 contact the protrusion 53 when the sliding door 20 is fully closed, thus blocking the space between the first door edge 21A of the first sliding door 21 and the second door edge 22A of the second sliding door 22.

[0026] (Gap structure between the vertical frame 26 on the door end side of the sliding door 20 and the central vertical support 33 of the fixed wall 30) Next, with reference to Figures 5 and 7, the gap structure between the door-end vertical frame 26 of the sliding door 20 and the central vertical post 33 of the fixed wall 30 will be described.

[0027] As shown in Figures 5 and 7, a smoke-stopping structure 60 is provided in the gap between the central vertical 33 of the fixed wall 30 and the vertical frame 26 on the door-end side of the sliding door 20. When fully closed, the central vertical 33 of the fixed wall 30 and the vertical frame 26 on the door-end side of the sliding door 20 face each other. The smoke-stopping structure 60 of the sliding door 20 comprises a first smoke-stopping member 61, a second smoke-stopping member 62, and a leaf spring 65. The first smoke-stopping member 61 is provided on the entire height-direction of the vertical frame 26 on the door-end side of the sliding door 20. The second smoke-stopping member 62 is provided on the entire height-direction of the central vertical 33 of the fixed wall 30. The first smoke-stopping member 61 and the second smoke-stopping member 62 are L-shaped members in plan view. The first smoke-stopping member 61 is inserted between the central vertical 33 and the second smoke-stopping member 62 when fully closed. Furthermore, the second smoke-stopping member 62 is inserted between the door-end vertical frame 26 and the first smoke-stopping member 61 when the door is fully closed.

[0028] The leaf spring 65 closes the gap between the first smoke-stopping member 61 and the second smoke-stopping member 62. The leaf spring 65 is a metal plate with brush-shaped legs 65B. The fixing portion 65A of the leaf spring 65 is fixed to the surface 62A of the second smoke-stopping member 62. The legs 65B of the leaf spring 65 close the gap by contacting the first smoke-stopping member 61.

[0029] (action) Next, the function of fire door 1 will be explained with reference to Figures 3 to 7. As shown in Figure 5, when a fire occurs, the fire door 1 remains fully closed to prevent flames and smoke from passing through the opening 5.

[0030] As shown in Figure 3, the sliding door-side smoke-stopping member 72, provided on the upper frame 27 of the sliding door 20, is inserted between the inner wall of the case 40 and the case-side smoke-stopping member 71. The protrusion 53 of the second sliding door 22 is inserted between the multiple barrier members 51 of the first sliding door 21. In other words, the creepage distance between the upper frame 27 and the case 40 is increased by the case-side smoke-stopping member 71 and the sliding door-side smoke-stopping member 72. The sliding door-side smoke-stopping member 72 then comes into contact with the leaf spring 73. As a result, the gap between the inner wall of the case 40 and the sliding door-side smoke-stopping member 72 is sealed by the leaf spring 73. The time it takes for smoke to reach the leaf spring 73 is increased, and the leaf spring 73 prevents smoke from passing through the case 40 and flowing from the side where the fire is occurring to the other side.

[0031] As shown in Figure 4, the leaf spring 81 provided on the bottom frame 28 of the sliding door 20 is always in contact with the surface of the guide rail 11. As a result, the gap between the bottom frame 28 of the sliding door 20 and the guide rail 11 is sealed by the leaf spring 81. Smoke cannot flow from the side where the fire is occurring to the opposite side through the gap between the guide rail 11 and the guide member 29.

[0032] As shown in Figure 6, when the sliding door 20 is fully closed, the protrusion 53 of the second sliding door 22 is inserted between the multiple barrier members 51 of the first sliding door 21. In other words, the creepage distance between the first door-side vertical frame 24 and the second door-side vertical frame 25 is increased by the joint structure 50. Also, the protrusion 53 of the second sliding door 22 comes into contact with the leaf spring 58. As a result, the gap between the first sliding door 21 and the second sliding door 22 is sealed by the leaf spring 58. The time it takes for smoke to reach the leaf spring 58 is increased, and the leaf spring 58 prevents the smoke from flowing from the side where the fire is occurring to the opposite side.

[0033] As shown in Figure 7, when the sliding door 20 is fully closed, the door-end vertical frame 26 of the sliding door 20 faces the central vertical 33 of the fixed wall 30. The first smoke-stopping member 61 is inserted between the central vertical 33 and the second smoke-stopping member 62. The second smoke-stopping member 62 is inserted between the door-end vertical frame 26 and the first smoke-stopping member 61. In other words, the creepage distance between the door-end vertical frame 26 and the central vertical 33 is increased by the first smoke-stopping member 61 and the second smoke-stopping member 62. The first smoke-stopping member 61 then comes into contact with the leaf spring 65. As a result, the gap between the door-end vertical frame 26 and the central vertical 33 is sealed by the leaf spring 65. The time it takes for smoke to reach the leaf spring 65 is increased, and the leaf spring 65 prevents the smoke from flowing from the side where the fire is occurring to the opposite side.

[0034] Next, the effects of this embodiment will be described. (1) The fire door 1 is equipped with metal leaf springs 58, 65, 73, and 81 that seal the space between the opening 5 and the sliding door 20. Therefore, when a fire occurs, the leaf springs 58, 65, 73, and 81 can suppress the flow of smoke from the side where the fire is occurring to the opposite side. In addition, by using highly flame-retardant metal leaf springs 58, 65, 73, and 81, deformation of the leaf springs 58, 65, 73, and 81 due to the heat of the fire is suppressed, and it is possible to prevent the smoke stopper from becoming ineffective due to deformation or detachment caused by deformation.

[0035] (2) The leaf spring 73 seals the space between the upper frame 27 of the sliding door 20 and the case 40, thereby preventing smoke from flowing between the upper frame 27 of the sliding door 20 and the case 40. (3) The leaf spring 81 blocks the space between the bottom frame 28 of the sliding door 20 and the guide rail 11, thereby preventing smoke from flowing between the bottom end of the sliding door 20 and the guide rail 11.

[0036] (4) The leaf spring 58 blocks the space between the first sliding door 21 and the second sliding door 22, thereby preventing smoke from flowing between the first sliding door 21 and the second sliding door 22. (5) The leaf spring 58 closes the gap between the first smoke-stopping member 61 on the door-end vertical frame 26 of the first sliding door 21 and the second smoke-stopping member 62 on the central vertical post 33 of the fixed wall 30, thereby preventing smoke from flowing between the door-end vertical frame 26 of the sliding door 20 and the fixed wall 30.

[0037] (Other embodiments) The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0038] In the above embodiment, a leaf spring 65 is provided between the first smoke-stopping member 61 and the second smoke-stopping member 62. However, the leaf spring 65 may be provided so as to close the space between the central vertical 33 and the first smoke-stopping member 61, and a rubber member may be provided as a buffer between the first smoke-stopping member 61 and the second smoke-stopping member 62. In addition, the leaf spring 58 may be provided between the door-end vertical frame 26 and the second smoke-stopping member 62, or it may be fixed to both the first smoke-stopping member 61 and the second smoke-stopping member 62.

[0039] In the above embodiment, a leaf spring 58 is provided on the first door-side vertical frame 24 between the multiple barrier members 51. However, the leaf spring 58 may be provided on any of the barrier members 51, and a rubber member as a cushioning material may be provided on the first door-side vertical frame 24. Also, the leaf spring 58 may be provided on the front side, or on both the front and back sides.

[0040] In the above embodiment, the leaf spring 81 between the bottom frame 28 of the sliding door 20 and the guide rail 11 is provided on the rear side. However, the leaf spring 81 may also be provided on the front side, or on both the front and rear sides.

[0041] In the above embodiment, the leaf spring 73 is fixed to the inner wall of the case 40. However, the leaf spring 73 may also be fixed to the sliding door side smoke stopper member 72. Also, the leaf spring 73 is provided on the rear side. However, the leaf spring 73 may also be provided on the front side, or on both the front and rear sides. Furthermore, a case side smoke stopper member and a sliding door side smoke stopper member may be added, and the leaf spring 73 should be configured to block the space through which smoke flows formed by these smoke stopper members.

[0042] In the above embodiment, it is not necessary to include all of the leaf springs 58, 65, 73, and 81, and any of the leaf springs may be omitted. In the above embodiment, the leaf spring is a metal plate having brush-shaped feet. However, other shapes are also acceptable, provided that they do not interfere with the operation of the sliding door 20.

[0043] In the above embodiment, the fixing portion 73A of the leaf spring 73 may have different shapes depending on the installation location. In the above embodiment, a structure composed of multiple objects may be integrated, or conversely, a structure composed of a single object may be divided into multiple objects. Whether or not the objects are integrated, the structure should be configured in a way that achieves the objective of the invention. [Explanation of symbols]

[0044] 1… Fire door 5…Aperture 10…Vertical frame 11… Guide rail 20... Sliding door 20A... Door end 21…First sliding door 21A…first door 22...Second sliding door 22A…Second door 23…glass plate 24…First door front side vertical frame 24A...First support member 24B...side 25…Second door front vertical frame 25A...Second support member 26…Doorjiri side stile 27…Upper stile 28…Lower stile 29… Guide member 30…Fixed wall 31…First fixed wall 32…Second fixed wall 33…Middle mullion 34… Baseboard 35... Glass plate 40...cases 40A...Lower 40B…Aperture 41…Drive unit 42... Control Unit 43...First door hanger 44... Second door hanger 45… Rails 50...Actually a girdled structure 51… Barrier member 53…Convex part 58…Leaf spring 58A…Fixed part 58B…Foot part 60... Smoke-stopping structure 61...First smoke-stopping member 62...Second smoke-stopping member 62A...side 65... Leaf spring 65A…Fixed part 65B…Foot part 70... Smoke-stopping structure 71...Case-side smoke stopper 72...Sliding door side smoke stopper 73... Leaf spring 73A…Fixed part 73B…Foot part 80...Actually a gi-like structure 81... Leaf spring 81A…Fixed part 81B…Foot part

Claims

1. A door that is installed in the opening, A metal leaf spring that closes the gap between the opening and the door, The system comprises a case that houses a drive mechanism for driving the door, and in which the upper end of the door enters the interior through a lower opening, The leaf spring is provided across the entire width of the lower part of the case and closes the space between the upper end of the door and the lower part of the case. Fire door.

2. A door that is installed in the opening, A metal leaf spring that closes the gap between the opening and the door, The system includes a guide rail that extends in the direction of movement of the door and guides the door, The leaf spring is provided across the entire width of the lower end of the door and closes the gap between the lower end of the door and the guide rail. Fire door.

3. A door that is installed in the opening, A metal leaf spring that closes the gap between the opening and the door, A fixed wall provided in an opening, wherein when fully closed, the vertical frame at the door edge of the fixed wall and the vertical frame at the door end of the door face each other, A first smoke-stopping member is provided on the entire vertical frame of the door's end in the height direction, The fixed wall comprises a second smoke-stopping member provided on the entire vertical frame of the door edge in the height direction, The leaf spring is attached to the entire surface in the height direction of the vertical frame on the surface of the first smoke-stopping member and the second smoke-stopping member facing the other end of the first smoke-stopping member and the second smoke-stopping member, thereby sealing the space between the first smoke-stopping member and the second smoke-stopping member. Fire door.

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