JP5199724B2 - Door device with smoke shielding function - Google Patents

Description

The present invention relates to a door device that opens and closes an opening by electrically raising and lowering one or more doors suspended by a suspension member, and more specifically, in the event of a fire, the one or more doors are lowered by their own weight. The present invention relates to a door device having a smoke shielding function for sealing an opening.

A so-called two-stage hanging door is known as a door device that opens and closes an opening by electrically raising and lowering one or more doors suspended by a suspension member. The two-stage hanging door is disclosed in, for example, Patent Document 1 and Patent Document 2, and as a specific configuration, two door bodies respectively positioned on the upper side and the lower side when the opening is fully closed, Guide rails that receive both ends in the width direction of the door body and guide it vertically, a suspension means that suspends each door body, and a drive means that raises and lowers the door body via the suspension means are provided. .

In order to make such a two-stage hanging door function as a fire door, it is necessary to release the brake of the switch and lower the weight of the door body in the event of a fire to close the opening. The two-stage hanging door has the following problems.

One is how to secure the smoke shielding function. In order to give a smoke barrier function to the two-stage hanging door, it is considered that the gap between the door body and the opening frame is closed with an airtight member such as a smoke shielding rubber provided in the opening frame when the opening is fully closed. However, if the door body is moved up and down while sliding in contact with the smoke-shielding rubber at the time of normal electric opening and closing, the smoke-shielding rubber will deteriorate, and there is a risk that a good smoke-shielding function cannot be secured in the event of an essential fire. In addition, if an ordinary smoke-proof shutter is installed, the apparatus will be large, resulting in an increase in cost, and the structure of the opening will be complicated, which is not desirable in terms of design, and a space for installing the smoke-proof shutter will be secured. There is a problem of having to.

The other is how to configure the hazard prevention mechanism. The door body of this type of two-stage hanging door is generally heavy, and how to reduce the compression load when an obstacle is detected becomes a problem.
Shoko Sho 59-7498 Utility Model Registration No. 31131602

An object of this invention is to provide the door apparatus provided with the harm prevention mechanism and the smoke shielding function.

The technical means adopted by the present invention are:
In a door device that opens and closes an opening by electrically lifting and lowering one or more doors suspended by a suspension member, and in the event of a fire, the one or more doors descend by their own weight to close the opening.
The door body is raised and lowered by guiding the guide members projecting on both end faces in the width direction up and down along the guide rail provided in the opening frame,
The lower end of the door body where the lower end is landed when the opening is fully closed includes a movable portion supported via a buffering means so as to be movable up and down between the upper movement position and the lower movement position.
By providing a seat plate switch that detects obstacles on the lower surface of the movable part, it is configured to stop the descent of the door body when an obstacle hits the seat plate switch when descending,
The opening frame is provided with a side airtight member that extends in the height direction and is located at a portion facing the finding surface of the fully closed door body,
In the fully closed state when the electric power is lowered, the movable part is in the downward movement position with the lower surface of the seat switch being landed, and a gap is formed between the door face and the side airtight member. Has been
The opening frame is provided with a pressing means that contacts the door body and presses the door body toward the side airtight member when the door body moves down from the fully closed state,
When the weight is lowered, the door is further lowered by a predetermined amount from the fully closed state during the electric lowering by moving the movable part to the upward movement position, and at the same time, the door is pressed toward the side airtight member by the pressing means. And a door device having a smoke-shielding function that presses the finding surface of the door body against the side airtight member.
In one aspect, the guide rail is formed with a bulging portion that is located immediately below the guide member in the fully closed state during electric lowering and bulges in the pressing direction by the pressing means. The door body is pressed toward the side airtight member by the pressing means, and the guide member is moved to the bulging portion, whereby the finding surface of the door body is pressed against the side airtight member.
Further, instead of the bulging portion (for example, when the bulging portion is located at the lower end of each guide rail of each door body, an opening for receiving the guide member is formed in the guide rail. The guide member may be moved in the pressing direction by entering the opening. When the clearance between the guide rail and the guide member is relatively large, the guide member may be moved in the pressing direction within the clearance.

In one aspect,
The one or more door bodies include a first door body located on the upper side in the fully closed state and a second door body located on the lower side, and the movable portion is provided at a lower end portion of the second door body. The first door body and the second door body are configured to move up and down in conjunction with each other,
The guide rail includes a first guide rail that guides both widthwise ends of the first door body, and a second guide rail that guides the widthwise both ends of the second door body,
The side airtight member includes a first side airtight member that faces the finding surface of the fully closed first door body, and a second side airtight member that faces the finding surface of the fully closed second door body. And consists of members,
In the fully closed state, the lower end portion of the first door body and the upper end portion of the second door body are opposed to each other, and the gap between the opposed portions is the lower end portion of the first door body and / or the second door body. It is blocked by a blocking member provided at the upper end.

In one aspect,
A contact portion is formed on the upper end portion of the door body whose upper end portion is located above the upper frame of the opening frame when the opening portion is fully closed,
An upper airtight member extending in the width direction of the opening is extended to the upper frame,
In the fully closed state at the time of electric lowering, the contact portion is located above the upper airtight member,
When the dead weight is lowered, the abutting portion comes into pressure contact with the upper airtight member by lowering the door body by a predetermined amount from the fully closed state during the electric lowering.

In the present invention, the airtight member of the opening frame and the door body are pressed against each other only at the time of a fire to exert a smoke shielding function, and in the normal lifting and closing state, the airtight member and the door body have a gap. Therefore, the airtight member is prevented from rubbing and deteriorating during elevation. Therefore, since the smoke-proof section can be formed only by the door device according to the present invention, the problems relating to cost increase, design, and space that can occur when a smoke-proof shutter is provided are solved.

In the present invention, since the seat plate switch is connected to the movable part supported so as to be movable up and down via the buffer member, when an obstacle hits the seat plate switch on the lower surface of the door body when descending, The movable part works as a cushion, and by selecting an appropriate cushioning member according to the weight of the door body and the descending speed, the compression load at the time of obstacle detection can be reduced to a predetermined load or less.

Embodiments of the present invention will be described in detail with reference to the drawings. 1 is an overall front view of the door device, FIG. 2 is a side view of the door device when the opening is fully closed, FIG. 3 is a side view of the door device when the opening is fully open, and FIG. 4A is a crossing of the door device. FIG. 4B is a partial enlarged view of FIG. 4A, and the door device is configured to open and close the opening when the two door bodies 1 and 2 are moved up and down. Both end portions in the width direction of the door bodies 1 and 2 are received and guided in guide rails 3 and 4 extending in the vertical direction along the movement path of the door bodies 1 and 2.

The door bodies 1 and 2 are panel bodies having dimensions corresponding to the full width of the opening, and are formed in a horizontal rectangular shape from the upper frames 1A and 2A, the lower frames 1B and 2B, and the left and right vertical frames 1C, 1D, 2C, and 2D. A plurality of intermediate frames 1E, 2E and plate-like members (for example, tempered glass) 1F, 2F that are assembled and extend in the weft direction are mounted therein.

Two upper and lower guide rollers 5A and 5B protrude from both end faces in the width direction of the door body 1 (end faces of the vertical frames 1C and 1D), respectively, and both end faces in the width direction of the door body 2 (vertical frames 2C and 2D). Are provided with two upper and lower guide rollers 6A and 6B, respectively. As the guide rollers 5A, 5B, 6A, 6B slide or roll in the guide rails 3, 4, the door bodies 1, 2 move up and down. Guide rollers 5C that rotate in the direction orthogonal to the rotation direction of the guide rollers 5A, 5B, 6A, 6B and slidably contact the bottom portions of the guide rails 3, 4 on both end surfaces in the width direction of the door bodies 1, 2 6C is provided to prevent the door bodies 1 and 2 from swinging in the width direction. 4A, for the sake of convenience, only the guide rollers 5A and 6A are shown on the left end faces of the door bodies 1 and 2, and only the guide rollers 5C and 6C are shown on the right end faces.

Left and right vertical frames 8 that support the guide rails 3 and 4 are erected on the left and right ends of the opening. The opening is surrounded by a three-way frame composed of an upper frame 7 and left and right side frames. As shown in FIG. 4A, the side frames are left and right inclined walls that extend in a plan view from the left and right vertical frames 8 that are erected inward from the building wall W toward the building wall W. 80. An outer end portion of the inclined wall 80 is connected to the building wall surface W, and a prospective wall 800 is integrally formed with the inner end portion of the inclined wall 80. Thus, the opening frame is composed of the upper frame 7, the vertical frame 8, and the side frame (the inclined wall 80 provided with the prospective wall 800). As shown in FIGS. 2, 3, 5A, and 5B, the prospective wall 800 corresponding to the door body 1 when the opening is fully closed is narrow, and the prospective wall 800 corresponding to the door body 2 is formed wide. The end faces 800A and 800B of the prospective wall 800 are formed in a stepped shape.

The left and right vertical frames 8 and the guide rails 3 and 4 are positioned outward in the opening width direction from the prospective wall 800 of the inclined wall 80, and guide rollers 5 </ b> A at both ends in the width direction of the door bodies 1 and 2. In the state where 5B, 6A, 6B, 5C and 6C are received in the guide rails 3 and 4 supported by the vertical frame 8, the width direction end portion side (vertical frames 1C and 1D) of the door body 1 is found. The surface is opposed to and close to the end surface 800A of the prospective wall 800 of the inclined wall 80 (FIGS. 2, 4B, and 5A). The finding surface of the door body 2 (vertical frames 2C, 2D) is opposed to and close to the end surface 800B of the prospecting wall 800 of the inclined wall 80 (FIGS. 2 and 5A).

As shown in FIG. 5A, when the opening is fully closed by electric lowering, the end surface 800A faces the finding surface of the upper door body 1 and the end surface 800B faces the finding surface of the lower door body 2 with a gap therebetween. doing. The prospective wall 800 is provided with a rubber member 801 as an airtight member adjacent to the end surfaces 800A and 800B (only the rubber member of the end surface 800A is shown in FIG. 4B), and the rubber member 801 is in a state where no external force acts. In FIG. 5, the end faces 800A and 800B protrude toward the facing surface. The rubber member 801 opposes the entire height direction of the finding surface of the door bodies 1 and 2 in the fully closed state during electric lowering, and the door bodies 1 and 2 in the smoke-proof fully closed state during weight drop. It is formed from the elongate member extended in a height direction so that it can closely_contact | adhere over the whole height direction of this finding surface. By doing so, the smoke shielding function of the left and right sides of the three-way frame is secured.

A storage part 70 is formed above the upper frame 7 for storing the door bodies 1 and 2 when the opening part is fully opened. A rubber member 701 extending in the opening width direction is provided on the upper surface of the upper frame 7, and in the smoke-proof fully closed state when the dead weight is lowered, the upper portion of the door 1 (see the upper frame 1 </ b> A). The abutting portion 702 provided on the attachment surface) across the width direction of the opening is in close contact with the rubber member 701 to ensure the smoke shielding function on the upper side of the three-way frame.

The guide rails 3 and 4 extend vertically in parallel, and the guide rail 4 that guides both ends in the width direction of the door body 2 extends over the entire height direction of the opening. The guide rails 3 that guide both ends in the width direction 1 extend over the height of the upper half of the opening corresponding to the position of the door 1 when the opening is fully closed. The upper ends of the guide rails 3 and 4 extend into the storage unit 70 above the opening, and smoothly guide the doors 1 and 2 up and down when opening and closing the opening.

As shown in FIG. 3, when the opening is fully opened, the door bodies 1 and 2 are stored in parallel in the storage unit 70. As shown in FIG. 2, when the opening is fully closed, the door body 1 is positioned on the upper side, the door body 2 is positioned on the lower side, the lower end of the door body 2 is landed, and the door body 2 The finding surface (outside) of the upper frame 2A and the finding surface (inside) of the lower frame 1B of the door body 1 face each other with a gap. A contact portion 20A provided on the finding surface of the upper frame 2A of the door body 2 over the opening width direction, and a contact portion 10A provided on the finding surface of the lower frame 1B of the door body 1 over the opening width direction. And the airtightness is maintained by closing the gap.

The door bodies 1 and 2 move up and down by an elevating drive mechanism. The elevating drive mechanism is provided on the suspension members 92 such as the chains 90 and 91 that suspend the door bodies 1 and 2, the opening and closing device 92 for winding and unwinding the chain 90, and the door bodies 1 and 2. Are provided.

The door body 1 is suspended by a chain 90, and the door body 1 is moved up and down by winding or unwinding the chain 90 by an opening / closing device 92. More specifically, left and right sprockets 93 are provided on the upper surface in the width direction of the door body 1, and a chain 90 that suspends the door body 1 is wound around the sprocket 93. In the parallel chains 90A and 90B wound around the sprocket 93 and extending upward, the end of one chain 90A is connected to a switch 92, and the end (upper end) of the other chain 90B is It is fixed to the ceiling of the storage unit 70. Therefore, by pulling one chain 90A by the opening / closing device 92, the sprocket 93 moves upward, and by drawing out one chain 90B by the opening / closing device 92, the sprocket 93 moves downward by helping the dead weight of the door body 1. By doing so, the door body 1 moves up and down.

The door body 2 is connected to the door body 1 by a chain 91 so that the door body 2 moves up and down in conjunction with the vertical movement of the door body 1. More specifically, the upper surface (upper frame 1A) in the width direction of the door body 1 is provided with left and right sprockets 94 located on the end side from the sprocket 93, and a chain for suspending the door body 2 91 is wound around the sprocket 94. In the parallel chains 91A and 91B wound around the sprocket 94 and extending downward, the end (lower end) of one chain 91A is connected to the door body 2, and the end of the other chain 91B (Lower end) is fixed to the frame member 700 of the upper frame 7. Accordingly, in conjunction with the vertical movement of the door body 1, the sprocket 94 moves up and down as a moving pulley, so that the door body 2 moves up and down at a speed twice that of the door body 1. In other words, the door body 1 is a low-speed panel and the door body 2 is a high-speed panel.

When the door is normally opened and closed, the door bodies 1 and 2 are moved up and down by the electric drive of the opening and closing device 92. On the other hand, the door device according to the present invention functions as a fire door. That is, the door device includes a smoke detector, a control unit, and an automatic closing device (not shown). When the disaster prevention signal is input to the control unit from the smoke detector when the opening is fully open, the automatic closing device is energized by the operation signal from the control unit and the brake of the switch 92 that regulates the feeding of the chain 90 is activated. After being released, the doors 1 and 2 descend while feeding the chain under their own weight, and the opening is fully closed.

At the lower end of the door body 2, a seat plate switch for preventing harm is provided. As shown in FIGS. 6A and 6B, the seat plate switch includes an upper seat plate 10 and a lower seat plate 11 provided so as to be movable up and down with respect to the upper seat plate 10. The switch 12 provided between the upper seat plate 10 and the lower seat plate 11 is input when the 11 moves upward. The signal line 13 electrically connected to the seat plate switch is wound around the cord reel 14 mounted at the upper end of the opening while holding the urging force in the winding direction. The signal line 13 is wound around the cord reel 14 or extended (see FIG. 1). The signal line 13 is electrically connected to the control unit, and the control unit that has received the detection signal from the seat plate switch restores the brake of the switch 92 and stops the lowering of the door bodies 1 and 2.

The lower end portion of the door body 2 includes a movable portion 20 supported so as to be movable up and down via an oil damper 15 exemplified as a buffering means. The seat plate switch, that is, the upper seat plate 10 is fixed to the movable portion 20. Has been. The buffer means is not limited to the oil damper, and the buffer means may be composed of other dampers or spring members.

As shown in FIGS. 6A and 6B, the movable portion 20 is suspended by a downward concave support portion 21 at the lower end portion of the door body 2. More specifically, the movable unit 20 includes a horizontal bottom piece 200 in a cross-sectional view, an opposing rising piece 201, a top piece 202 formed at the upper end of the rising piece 201, and a hanging piece depending from the top piece 202. 203, and a latching portion whose lower side is open from the rising piece 201, the top piece 202, and the hanging piece 203 is formed.

The downward concave support portion 21 includes a horizontal top piece 210 in cross-sectional view, an opposing hanging piece 211, a bottom piece 212 formed at the lower end of the hanging piece 211, and a rising piece 213 formed rising from the bottom piece 212. And a hooked portion whose upper side is open from the hanging piece 211, the bottom piece 212, and the rising piece 213 is formed.

The movable portion 20 is suspended from the support portion 21 by hooking the hook portion of the movable portion 20 to the hooked portion of the support portion 21. As shown in FIG. 6A, when the movable part 20 is suspended from the support part 21, the movable part 20 and the supported part 21 have the same height dimension. The lower end of the 20 hanging pieces 203 is in contact with the upper surface 212 of the bottom piece of the support portion 21, and the upper end of the rising piece 213 of the support portion 21 is in contact with the lower surface of the top piece 202 of the movable portion 20.

FIG. 5A is a diagram showing the door bodies 1 and 2 when fully closed by a normal electric drop, and FIG. 6A is an enlarged view of the lower end portion of the door body 2 when fully closed by a normal electric drop. is there. In the door bodies 1 and 2 that are electrically lowered, when the lower seat plate 11 at the lower end of the door body 2 is landed, the seat board switch is turned on and the electric lowering of the door bodies 1 and 2 is stopped and the fully closed state. Become. At the time of electric lowering, the door bodies 1 and 2 are lowered relatively slowly in consideration of safety and the like while being suspended. Therefore, the lowering distance of the door bodies 1 and 2 after the seat plate switch is input is extremely small. In a more specific mode example, during electric descent, it is detected by a limit switch that the door bodies 1 and 2 have been lowered to a predetermined height, and after the detection, the descent speed of the door bodies 1 and 2 is reduced to reduce the door bodies 1 and 2. Is lowered at a low speed. Therefore, in the normal fully closed state due to the electric lowering, as shown in FIG. 6A in particular, the seat plate switches (upper seat plate 10, lower seat plate 11, switch 12) protrude downward from the lower end surface of the door body 2. Become.

The seat plate switch is supported via a buffer member (oil damper 15) in a state of protruding downward from the lower end of the door body 2. The piston rod 150 of the oil damper 15 protrudes downward in a state where the movable portion 20 is suspended at the lower end thereof. The oil damper 15 protrudes downward while bearing the weight of the movable portion 20 and the seat plate switch (upper seat plate 10, lower seat plate 11, switch 12), and this state is caused by the oil damper 15 when no external force is applied. Maintained. When an upward force acts on the seat plate switch, the balance between the force of the oil damper 15 and the weight of the movable portion 20 and the seat plate switch (upper seat plate 10, lower seat plate 11, switch 12) is lost, and the oil damper 15 The piston rod 150 moves upward and downward.

FIG. 5A shows the positions of the guide rollers 5A, 5B, 6A, and 6B of the door bodies 1 and 2 in a normal fully closed state. Moreover, as shown to FIG. 4B, in the normal fully closed state, the clearance gap is formed between the finding surface of the door body 1 (vertical frame 1C, 1D) and the rubber member 801 by the side of an opening frame. A gap is also formed between the finding surface of the door body 2 (vertical frames 2C, 2D) and a rubber member (not shown) on the opening frame side.

As shown in FIGS. 6A and 6B, the height dimension of the hanging piece 211 of the support portion 21 is set to be larger than the dimension of the rising piece 213 of the hooked portion, and the horizontal bottom surface 200 of the movable portion 20. When an upward force is applied to the seat plate switch mounted on the lower surface of the base plate, a space is secured in which the movable portion 20 can move upward in the concave concave support portion 21. Therefore, an obstacle (including a person) hits the seat plate switch at the lower end of the door 2 during the electric lowering of the doors 1 and 2 or when the doors 1 and 2 are lowered due to the input of the disaster prevention signal. In this case, the movable portion 20 is moved up by the force of the oil damper 15, so that it functions as a cushion and can reduce an impact on a person or an object. In one aspect, the movable part 20 can move by a stroke of 30 mm. The spring force of the oil damper is set so that the compression load when an obstacle comes into contact with the lower end of the door body 2 when the weight is lowered is 150 N or less.

When the dead weight is lowered, the door bodies 1 and 2 are lowered by their own weight, and even after the seat plate switch at the lower end of the door body 2 is operated, the door bodies 1 and 2 are lowered by a predetermined amount while moving the movable portion 20 upward. It is configured. In one aspect, when the seat plate switch is landed at the time of its own weight descent, the descent of the door bodies 1 and 2 is stopped via a delay circuit (for example, 1 second), so that the fully closed state at the time of electric descent is stopped. The door bodies 1 and 2 can be lowered by a predetermined amount while moving the movable portion 20 upward.

As shown in FIG. 2, FIG. 3, FIG. 4A, FIG. 4B, FIG. 5A, and FIG. 5B, a door body pressing roller 16 exemplified as pressing means is provided at a predetermined height portion of the vertical frame 8. The pressing roller 16 is provided so as to be rotatable with respect to the plate 160 fixed at a predetermined height position of the vertical frame 8. The pressing means is not limited to the pressing roller, and may be another member as long as it is a member that can contact the part of the descending door bodies 1 and 2 and push the door bodies 1 and 2 to the outdoor side. It may be a member having a curved surface for contact. On the other hand, as shown in FIG. 4A, FIG. 4B, FIG. 5A, and FIG. 5B, the door bodies 1 and 2 try to descend further from the normal fully closed position (FIGS. 2 and 5A). A contacted portion 17 is sometimes provided that contacts the pressing roller 16 at times. That is, the relative positional relationship between the height position where the pressing roller 16 is provided and the contacted portion 17 provided on the door bodies 1 and 2 is just below the contacted portion 17 in the normal fully closed state. The positional relationship is such that the pressing roller 16 is positioned, and the contacted portion 17 comes into contact with the pressing roller 16 as soon as the door bodies 1 and 2 are lowered while the movable portion 20 is moved upward from the normal fully closed state. It is a positional relationship.

As shown in FIG. 4B, the abutted portion 17 protrudes from the end surfaces in the width direction of the door bodies 1 and 2 (the end surfaces of the vertical frames 1C, 1D, 2C, and 2D). The guide surface 170 which consists of these inclined surfaces is provided. The guide surface 170 is located above the pressing roller 16 and is close to the outdoor side of the pressing roller 16 (on the rubber member 801 side of the opening frame) in a plan view. When the inclined surface of the lower part of the guide surface 170 of the portion 17 comes into contact with the pressing roller 16, the door bodies 1 and 2 are lowered by a predetermined amount (30 mm) while being pushed out to the outdoor side by the vertical surface of the guide surface 170.

As shown in FIGS. 5A and 5B, the guide rails 3 and 4 are positioned directly below the height at which the guide rollers 5A, 5B, 6A, and 6B are located in the normal fully closed state. There are provided bulging portions 3B, 4A, 4B that bulge in the direction in which the door bodies 1, 2 are pushed out by the pressing roller 16. In the bulging portions 3B and 4B corresponding to the guide rollers 5B and 6B on the lower side of the door bodies 1 and 2, both of the opposing side pieces forming the guide grooves of the guide rails 3 and 4 bulge in the pressing direction. Yes. As for the bulging portion 4A corresponding to the guide roller 6A on the upper side of the door body 2, only the piece located on the outdoor side of the opposed side pieces forming the guide groove of the guide rail 4 bulges in the pressing direction. . Although the bulging portion corresponding to the guide roller 5A is not shown in the drawing, the bulging portion similar to the bulging portion 4A corresponding to the guide roller 6A is formed on the guide rail 3.

Therefore, when the door bodies 1 and 2 are pushed out to the outdoor side by the guide surface 170, the guide rollers 5A, 5B, 6A, and 6B protruding from the both end surfaces in the width direction of the door bodies 1 and 2 are also guided by the guide rails 3 and 4 respectively. Since it moves to the outdoor side along the bulging portions 3B, 4A, and 4B, the displacement of the door bodies 1 and 2 to the outdoor side (the rubber member 801 side) and the lowering of a predetermined amount (in one example, 30 mm) It is done smoothly. When the door bodies 1 and 2 further descend from the normal closed position, the door bodies 1 and 2 are in a disaster prevention closed state.

In the disaster prevention closed state, the door members 1 and 2 are displaced to the outdoor side (rubber member 801 side), so that the rubber member 801 (the door member) provided with the facing surface of the door members 1 and 2 on the prospecting wall 800 of the three-sided frame. The rubber members corresponding to the two finding surfaces are pressed against each other (not shown), and the finding members of the door bodies 1 and 2 formed in a normal fully closed state and the rubber members 801 of the three-sided frame look-up wall 800, A good smoke-insulating performance can be obtained at the left and right sides of the three-way frame.

When the dead weight is lowered, the doors 1 and 2 are lowered by a predetermined amount while moving the movable part 20 from the normal fully closed state, so that the contact part 702 provided on the finding surface of the door 1 is the upper frame 7. By pressing the rubber member 701 provided on the upper side from above, good smoke shielding performance can be obtained at the upper part of the three-way frame.

When the door bodies 1 and 2 are lowered by a predetermined amount while moving the movable part 20 upward from the normal fully closed state when the dead weight is lowered, the lowered door body 2 is moved to the piston rod 150 of the oil damper 15 as shown in FIG. , So that not only the lower seat plate 11 of the seat plate switch but also the horizontal bottom piece 212 of the hooked portion of the support portion 21 is landed. At this time, the horizontal top piece 202 of the hooking portion of the movable portion 20 is in contact with the top piece 210 of the hooked portion of the support portion 21. At the disaster prevention closed position, the lower end of the door body 2 is landed at three locations, that is, the lower seat plate 11 and the bottom pieces 212 on both sides thereof, so that good smoke shielding performance can be obtained at the lower portion of the door body 2.

The present invention can be used for a door device having a fire prevention function.

It is a whole front view of a door device. It is a side view of the door apparatus at the time of an opening part full closure. It is a side view of the door apparatus at the time of an opening part full open. It is a cross-sectional view of a door device. It is the elements on larger scale of FIG. 4A. It is a side view of the door body of a fully closed state (normal full closed state) at the time of electric descent. It is a side view of the door body of the fully closed state (disaster prevention fully closed state) at the time of gravity fall. It is a fragmentary view of the lower part of the door body in the fully closed state (normal fully closed state) during electric lowering. It is a partial figure of the lower part of a door body of a fully closed state (disaster prevention fully closed state) at the time of gravity fall.

Explanation of symbols

1 door body 10A contact part (blocking member)
2 Door body 20A contact part (blocking member)
20 Movable part 21 Support part 10 Upper seat plate 11 Lower seat plate 12 Switch 15 Oil damper (buffer means)
16 Pressing roller (pressing means)
17 Contacted portion 701 Rubber member (upper airtight member)
702 Contact portion 801 Rubber member (side airtight member)

Claims (4)

In a door device that opens and closes an opening by electrically lifting and lowering one or more doors suspended by a suspension member, and in the event of a fire, the one or more doors descend by their own weight to close the opening.
The door body is raised and lowered by guiding the guide members projecting on both end faces in the width direction up and down along the guide rail provided in the opening frame,
A movable part supported via a buffer means so that the lower end part of the door body where the lower end is landed when the opening part is fully closed can move up and down between the upper movement position and the lower movement position with respect to the door body. With
By providing a seat plate switch that detects obstacles on the lower surface of the movable part, it is configured to stop the descent of the door body when an obstacle hits the seat plate switch when descending,
The opening frame is provided with a side airtight member that extends in the height direction and is located at a portion facing the finding surface of the fully closed door body,
In the fully closed state when the electric power is lowered, the movable part is in the downward movement position with the lower surface of the seat switch being landed, and a gap is formed between the door face and the side airtight member. Has been
The opening frame is provided with a pressing means that contacts the door body and presses the door body toward the side airtight member when the door body moves down from the fully closed state,
When the weight is lowered, the door is further lowered by a predetermined amount from the fully closed state during the electric lowering by moving the movable part to the upward movement position, and at the same time, the door is pressed toward the side airtight member by the pressing means. And press the face of the door body against the side airtight member,
A door device with a smoke shielding function. The guide rail is formed with a bulging portion that is located directly below the guide member in the fully closed state during electric lowering and that bulges in the pressing direction by the pressing means. Pressing the side to the side airtight member and moving the guide member to the bulging portion to press-contact the finding surface of the door body to the side airtight member,
The door apparatus provided with the smoke shielding function according to claim 1. The one or more door bodies include a first door body located on the upper side in the fully closed state and a second door body located on the lower side, and the movable portion is provided at a lower end portion of the second door body. The first door body and the second door body are configured to move up and down in conjunction with each other,
The guide rail includes a first guide rail that guides both widthwise ends of the first door body, and a second guide rail that guides the widthwise both ends of the second door body,
The side airtight member includes a first side airtight member that faces the finding surface of the fully closed first door body, and a second side airtight member that faces the finding surface of the fully closed second door body. And consists of members,
In the fully closed state, the lower end portion of the first door body and the upper end portion of the second door body are opposed to each other, and the gap between the opposed portions is the lower end portion of the first door body and / or the second door body. It is blocked by a blocking member provided at the upper end,
A door device having the smoke shielding function according to claim 1. A contact portion is formed on the upper end portion of the door body whose upper end portion is located above the upper frame of the opening frame when the opening portion is fully closed,
An upper airtight member extending in the width direction of the opening is extended to the upper frame,
In the fully closed state at the time of electric lowering, the contact portion is located above the upper airtight member,
When the dead weight is lowered, the contact body is pressed against the upper airtight member by lowering the door body by a predetermined amount from the fully closed state at the time of electric lowering,
The door apparatus provided with the smoke shielding function in any one of Claims 1 thru | or 3.

Images