JP2018199975A - Pressure difference alleviation device - Google Patents

Abstract

To form a shiplap structure at the closure of an opening part even if an axial core of a turning body for alleviating a pressure difference is separated from an end part.SOLUTION: A second door body 3 has a first region and a second region with a turning axial core sandwiched therebetween, a slave door opening part O of a first door body 2 has a first region and a second region with a turning axial core sandwiched therebetween, the first door body 2 has a peripheral edge part 4 which adjoins the first region of the slave door opening part O and opposes an aspect face of the first region of the second door body 3 which is in a closed posture, the second door body 3 has a peripheral edge part 5 which opposes an aspect face of the first door body 2 adjoining the second region of the slave door opening part O when the second door body 3 is in the closed posture, and either an end part of the peripheral edge 4 or an end part of the peripheral edge 5 comprises an eye plate 8 which opposes an aspect face of the other end part when the second door body 3 is in the closed posture.SELECTED DRAWING: Figure 11

Description

The present invention relates to a differential pressure reducing device, and more specifically, when a pressure difference is generated between a first space and a second space partitioned by a door body in a fully closed state of an opening, the first space and the second space are provided. The present invention relates to a differential pressure reducing device that can reduce a pressure difference in a space and reduce an opening force of a door body.

There may be a pressure difference between the inside and outside of the door when the opening is fully closed due to smoke exhausting equipment (smoke exhaust system or pressurized smoke prevention system). If the body's opening force increases, it may interfere with evacuation and fire fighting activities.

As a countermeasure, the pressure difference between the first space and the second space is alleviated by opening the small area first by providing the door with a child door or dividing the door into two parts. A differential pressure relaxation mechanism that reduces the opening force of the door body has been proposed (Patent Document 1, Patent Document 2).

However, in the case where the child door is a rotating body whose rotating shaft core is separated from the door end, the rotating body rotates around the rotating shaft core, so that both end portions of the rotating body are in the first space. In this state, it protrudes into the second space, and in the closed state of the opening, it is difficult to form the phase stack structure necessary for the fire prevention equipment.
JP-A-7-259407 Patent No. 5535348

  The present invention provides a differential pressure alleviating device capable of forming a phase stacking structure when an opening is closed even when the axis of a rotating body for relaxing the differential pressure is away from the end. For the purpose.

The technical means adopted by the present invention to solve this problem are as follows:
An opening provided in a partition of the first space and the second space;
By rotating from a closed posture that closes the opening, the rotating body that communicates the first space and the second space to relieve the differential pressure,
The rotating body has a first part and a second part across a rotating shaft core,
The opening has a first part and a second part across the rotation axis, and when the rotating body is in a closed posture, the first part of the rotating body is located at the first part of the opening, The second part of the rotating body is located at the second part of the opening,
The partition has a first peripheral edge that is adjacent to the first part of the opening and that faces the finding surface of the first part of the rotating body in the closed posture,
The rotating body has a second peripheral edge that faces the finding surface of the partition adjacent to the second portion of the opening when the rotating body is in a closed posture;
Either one of the end of the first peripheral portion and the end of the second peripheral portion includes a cover portion that faces the finding surface of the other end when the rotating body is in the closed posture. Yes,
A differential pressure relief device.
In one aspect, at the time of rotation from the closed posture, one of the first part and the second part of the rotating body protrudes into the first space and the other protrudes into the second space.
In one aspect, the cover is a face plate provided on a finding surface of one of the end of the first peripheral edge and the end of the second peripheral edge.

  In one aspect, the cover covers a gap formed between the rotating body and the peripheral surface of the opening in the vicinity of the rotating shaft when the rotating body is in a closed posture.

In one aspect, the pivot axis is offset from the center of the rotating body so that the area of the first surface of the rotating body is different from the area of the second surface of the second surface.
By doing so, the rotating body in the closed posture is rotated using the pressure difference acting on the first part and the second part of the finding surface of the rotating body.
In one aspect, the rotating body is urged in the closing direction, and this urging force is smaller than an opening force using an assumed pressure difference.

In one aspect, the rotating body includes a closing posture maintaining means for restricting the rotation of the rotating body in the closed posture, and a closing posture maintenance releasing means for permitting the rotation of the rotating body from the closed posture.
In one aspect, the closed posture maintaining means is a means for maintaining the locked state, for example, a latch that is biased to maintain the locked posture.
In one aspect, the closed posture maintenance releasing means is a means for releasing the locked state, for example, a means for moving the latch in the locked posture to the retracted position (regardless of mechanical means or electrical means). ).

In one aspect, the rotation angle of the rotating body is limited by the rotation angle restricting means.
In one aspect, the rotation angle restricting means is a contact portion that contacts the rotating body when the rotating body in the closed posture rotates by a predetermined angle.
In one aspect, the rotation angle restricting means is means (for example, an arm stopper) that mechanically restricts further rotation of the rotating body when the rotating body in the closed posture rotates by a predetermined angle.

In one aspect, the partition is a main door, the opening is a child door opening formed in the main door, and the rotating body is a child door.
In one aspect, the first part of the rotating body is located on the door end side of the main door, the second part is located on the door bottom side of the main door, and the area of the finding surface of the second part is It is larger than the area of the finding surface of the first part.
In one embodiment, in the fully closed state of the opening, the maintenance of the closed position of the child door is released by the handle operation of the main door, and the difference in pressure acting on the first part and the second part of the finding surface of the child door Rotate the child door. By doing this, the main door is opened by rotating the child door with one action of opening the main door (turning the handle of the main door) to relieve the differential pressure between the first space and the second space. Can do. Moreover, you may open the child door in a closed position independently of the opening operation of the main door.

  In one mode, the 1st peripheral part is provided with the 1st airtight member closely_contact | adhered to the finding surface of the 1st part of the rotation body in a closed posture, and the rotation body is provided in the 2nd peripheral part. When in the closed posture, a second hermetic member is provided to be in close contact with the finding surface of the partition adjacent to the second part of the opening, and either the end of the first hermetic member or the end of the second hermetic member The one end portion includes an end airtight element to which the other end portion comes into close contact when the rotating body is in the closed posture, and the end airtight element is fixed to the cover portion.

  In the present invention, since the overlap structure is continuously formed over the entire circumference of the opening in a state where the rotating body closes the opening, a gap that directly passes between the first space and the second space is formed. Therefore, it is possible to provide a differential pressure alleviating device that can be used as fire prevention equipment.

It is the front view which looked at the door apparatus (opening part fully closed state) concerning this embodiment from the 1st space side. It is the front view which looked at the door device (opening part fully closed state) concerning this embodiment from the 2nd space side. It is the front view which looked at the 1st door concerning this embodiment from the 1st space side. It is a longitudinal cross-sectional view of the 1st door body which concerns on this embodiment. It is a cross-sectional view of the 1st door body which concerns on this embodiment. It is the front view which looked at the 2nd door concerning this embodiment from the 1st space side. (A) is a side view of the 2nd door body concerning this embodiment, and (B) is a longitudinal section of the 2nd door body concerning this embodiment. It is a cross-sectional view of the 2nd door concerning this embodiment. (A) is the front view and longitudinal cross-sectional view which looked at the 1st door body concerning this embodiment from the 1st space side, (B) is the front which looked at the 2nd door body concerning this embodiment from the 1st space side. It is a figure and a longitudinal cross-sectional view. It is a figure which shows the arm stopper as a rotation angle control means of a 2nd door body. It is the front view which looked at the door device (opening part fully closed state) concerning this embodiment from the 2nd space side, and has shown arrangement of airtight rubber as a peripheral part, an eyeplate part, and an airtight member. (A) is a partial perspective view of a portion provided with the upper eyeplate portion shown in FIGS. 2 and 9, and (B) is a portion provided with the lower eyeplate portion shown in FIGS. 2 and 9. FIG. (A), (B) is a perspective view of an eyeplate part. (A) is a plan view of the eyeplate portion, (B) is a front view of the eyeplate portion of (A), (C) is a rear view of the eyeplate portion of (A), and (D) is the eye of (A). It is a side view of a board part. It is a longitudinal cross-sectional view of the door bottom side part of the 1st door body of the door apparatus (opening part fully closed state) which concerns on this embodiment. It is a longitudinal cross-sectional view in the eyeplate part of the door apparatus (opening part fully closed state) which concerns on this embodiment. (A) is a longitudinal cross-sectional view in the 1st site | part (one side which pinched | interposed the rotating shaft core) of the door apparatus (opening part fully closed state) which concerns on this embodiment, (B) is the door which concerns on this embodiment. It is a longitudinal cross-sectional view in the 2nd site | part (other side which pinched | interposed the rotating shaft core) of an apparatus (opening part fully closed state). It is a cross-sectional view of the door device (opening portion fully closed state) according to the present embodiment. FIG. 19A is an enlarged cross-sectional view of the vicinity of the eyeplate portion in FIG. (B) is the upper part fragmentary figure of the front view which looked at the 2nd door body from the 2nd space. It is a figure explaining interruption | blocking of the light ray which goes straight through the 1st space and 2nd space by an eyeplate part (assuming the state which airtight rubber melt | dissolved). FIG. 3 is an enlarged longitudinal sectional view in the vicinity of the eyeplate (assuming a state in which the airtight rubber is dissolved). It is an expanded partial cross-sectional view of the door end side site | part of the door apparatus (opening part fully closed state) which concerns on this embodiment. It is a figure which shows opening operation | movement of the door apparatus which concerns on this embodiment. It is a figure similar to FIG. 12 (A), and is a partial perspective view of a part provided with the eyeplate part according to the second embodiment. It is a figure similar to FIG. 18, and is a cross-sectional view of the door device (opening portion fully closed state) according to the second embodiment. FIG. 20 is a view similar to FIG. 19A and is an enlarged cross-sectional view in the vicinity of the eyeplate portion in FIG. 24 (assuming a state in which the airtight rubber is dissolved). The upper view is a cross-sectional view of the door device (opening portion fully closed state) according to the third embodiment, and the lower view is a cross-sectional view showing a state in which the second door body is rotated from the state of the upper view. The upper figure is a transverse sectional view of a door device (opening part fully closed state) according to the fourth embodiment, and the lower figure is a transverse sectional view showing a state in which the second door body is rotated from the state of the upper figure. It is a figure similar to FIG. 2, and is the front view which looked at the door apparatus (opening part fully closed state) which concerns on 5th Embodiment from the 2nd space side. It is a figure similar to FIG. 2, and is the front view which looked at the 2nd door body (opening part fully closed state) which concerns on 6th Embodiment from the 2nd space side.

[A] Door Device The door device according to the present embodiment is installed in a building opening provided in a housing that divides the first space and the second space. In the present embodiment, in the fully closed state of the opening, the pressure in the first space may be greater than the pressure in the second space by the smoke exhausting equipment, the pressurized smoke-proofing equipment, or the like, and the first space is the second space. It is assumed that the pressure will be higher than that. 1 is a front view of the door device viewed from the first space side, and FIG. 2 is a front view of the door device viewed from the second space side. The door device is formed by the door frame 1 and the door frame 1. The first door body (main door or main door) 2 provided so as to open and close the building opening and the second door body (child door) 3 provided on the first door body 2. The door frame 1 has a vertical rectangular shape from a door end side vertical frame 10, a door bottom side vertical frame 11, an upper frame 12, and a lower frame 13.

[A-1] First door 2 (parent door or main door)
The 1st door body 2 is a hinged door which opens a building opening part by rotating to the 1st space side from the opening part full-closed attitude | position centering on the rotation spindle P1 (refer FIG. 22). As shown in FIGS. 3 to 5, the first door body 2 has a vertical rectangular shape when viewed from the front, the first finding surface 20 facing the first space, and the second finding surface facing the second space. 21, a door end side end surface 22, a door bottom side end surface 23, an upper end surface 24, and a lower end portion (in the illustrated embodiment, the lower end is not a surface but an open shape) 25. A dotted line in FIG. 3 indicates a frame material (a U-shaped cross-sectional view) built in between the first finding surface 20 and the second finding surface 21. The door butt side portion of the first door body 2 is rotatably mounted on the door butt side portion of the building opening (door frame 1) around the rotation support shaft P1. Typically, the rotation support shaft P1 is an element of a hinge (bibot hinge, flag hinge, etc.).

A handle H is provided on the door end side portion of the first finding surface 20 and the second finding surface 21 so as to be located at an intermediate portion in the height direction. A pivot hinge 14 that provides a pivotal support shaft P <b> 1 is provided above and below the end portion on the door bottom side of the first door body 2, and the door frame side vertical frame 11 and the upper frame of the door frame 1 are provided by the upper and lower pivot hinges 14. The frame 12 and the lower frame 13 are rotatably supported. In the illustrated embodiment, the pivot hinge 14 is provided at the door bottom side portion of the first finding surface 20, but may be provided within the thickness of the first door body 2, in this case, the upper frame 12, the lower frame The frame 13 is rotatably supported. Moreover, when a hinge is used, it is rotatably supported by the door-end side building frame 11. A door closer 15 as a closing means for the first door 2 is provided between the upper end of the second finding surface 21 of the first door 2 and the upper frame 12 of the door frame 1, and the door closer 15 is the first door. The body 2 is urged in the closing direction. A latch L1 is incorporated in the door-end side portion of the first door body 2, and the latch L1 is between the locking posture protruding from the door-end side end surface 22 and the retracted posture retracted into the door-end side end surface 22. It is possible to move with. The latch L1 is biased so as to maintain the locking posture. When the first door body 2 is closed, the latch L1 is latched by the latch receiver 1000 formed on the expected surface 100 of the door-side vertical frame 10 of the door frame 1. By locking, the closed posture of the first door body 2 is maintained (see FIG. 21). By operating the handle H, the latch L1 in the locked posture is set to the retracted posture, so that the locked state of the first door body 2 on the door end side is released, and the first door body 2 can be opened.

The door frame 1 is provided with a door stop portion with which the first door body 2 in the closed posture abuts. In the illustrated embodiment, the three peripheral portions (on both sides in the width direction and on the upper side) of the second finding surface 21 of the first door body 2 come into contact with the door stop portion. More specifically, as shown in FIG. 18, in the door-end-side vertical frame 10, the door-side end surface 22 of the first door body 2 in the closed posture is on the second space side of the prospective surface 100 that is close to and opposed to A groove 101 that opens toward the first space is formed, and a door-end side airtight member (airtight rubber) 102 is provided in the groove 101. Similarly, in the door bottom side vertical frame 11, a groove portion that opens toward the first space is formed on the second space side of the prospective surface 110 that the door bottom side end surface 23 of the first door body 2 in the closed posture is in close proximity to. 111 is formed, and a door bottom side airtight member (airtight rubber) 112 is provided in the groove 111. As shown in FIG. 17A, in the upper frame 12, the upper end surface 24 of the first door body 2 in the closed posture is open toward the first space on the second space side of the lower surface 120 facing closely. A groove 121 is formed, and an upper airtight member (airtight rubber) 122 is provided in the groove 121. When the opening is closed, the three peripheral edges (door tip side, door butt side, upper side) of the second finding surface 21 of the first door body 2 are the door tip side airtight rubber 102, door butt side airtight rubber 112, upper side. Adheres to the airtight rubber 122. The lower part of the first door body 2 is provided with an airtight member 250 that protrudes downward beyond the lower end 25 when the first door body 2 is in the fully closed position. An airtight member 250 projecting downward from the lower end of the one door body 2 is in close contact with the upper surface 130 of the lower frame 13 (see FIG. 15).

A vertical rectangular child door opening O is formed in the surface portion of the first door 2 so as to penetrate the first finding surface 20 and the second finding surface 21, and the child door opening O is formed. Is surrounded by the first side face 26 of the first door body 2 near the door end, the second side face 27 of the first door body 2 near the door bottom side, the upper surface 28 and the lower surface 29, and the child door opening O Are formed from a first side face 26 of the first door body 2 near the door-end side, a second side face 27 of the first door body 2 near the door-end side, an upper surface 28, and a lower surface 29 (FIG. 3, 4 and 5).

[A-2] Second door 3 (child door)
The first door body 2 is provided with a second door body 3 so as to close the child door opening portion O, and the second door body 3 is rotated from the fully closed posture to open the child door opening portion O. Is to be released. The second door 3 is centered on the pivot P2 located within the door width, the first part on the one side in the width direction from the fully closed position of the opening is the first space side, and the second part on the other side is the first. It is a revolving door that opens the child door opening O by rotating to the space 2 side (see FIG. 22). As shown in FIGS. 6 to 8, the second door body 3 has a vertically rectangular shape when viewed from the front, a first finding surface 30 facing the first space, and a second finding surface facing the second space. 31, the first end surface 32 on the first side face 26 side of the child door opening O, the second end face 33 on the second side face 27 side of the child door opening O, the upper end face 34, the lower end (in the illustrated embodiment, The lower end is not a surface but an open shape) 35. A dotted line in FIG. 6 indicates a frame material (a U-shaped cross-sectional view) built in between the first finding surface 30 and the second finding surface 31. In the present embodiment, the expected size (door thickness) of the second door body 3 is smaller than the expected size (door thickness) of the first door body 2, and when the second door body 3 is in the closed position, the first door The second finding surface 21 of the body 2 and the second finding surface 31 of the second door body 3 are on the same vertical plane (is flush), and the first finding surface 30 of the second door body 3 is the first one. It exists in the position dented with respect to the 1st finding surface 20 of the 1 door body 2 (refer FIGS. 16-18).

The second door body 3 is rotatably attached to the child door opening O of the first door body 2 around the rotation support shaft P2. A vertical line (rotation axis) passing through the rotation support shaft P <b> 2 is biased with respect to the center of the width of the second door body 3. In the illustrated embodiment, the rotation support shaft P2 of the second door body 3 is within the thickness of the second door body 3 in plan view, and the rotation support shaft P2 includes the first door body 2 and the second door body. 3 extends vertically. Typically, the rotation support shaft P2 is an element of a hinge (bibot hinge, auto hinge, etc.). Although the structure of the rotation part of the 2nd door body 3 is not limited, in this embodiment, the auto hinge 16 is provided in the position deviated from the central part of the width direction of the 2nd door body 3 to the 1st end face 32 side, The second door body 3 rotates around the axis of the auto hinge 16 (rotation support shaft P2). As shown in FIG. 9, the upper element (the first door body side element 160 and the upper door element 160) of the auto hinge 16 extends over the upper surface 28 of the child door opening O of the first door body 2 and the upper end surface 34 of the second door body 3. (The second door body side element 161) is provided, and the lower element of the auto hinge 16 (the lower element 29 of the child door opening O of the first door body 2 and the lower end portion 35 of the second door body 3) 1st door body side element 162 and 2nd door body side element 163) are provided. The auto hinge 16 biases the second door body 3 in the closing direction, and also functions as a closing means for the second door body 3. More specifically, a spring as a biasing means is built in the cylindrical portion of the second door body side element 163 which is the lower element of the auto hinge 16, and when the second door body 3 is rotated from the closed posture. The second door body 3 is rotated in the closing direction by the urging force of the accumulated spring. In the present embodiment, the closing means of the second door body 3 is built in the auto hinge 16, but the closing means may be provided independently of the rotating portion (hinge) of the second door body 3.

The second door body 3 is provided with means for maintaining a closed posture. For example, when the second door 3 is in the closed position, the peripheral surface of the second door 3 (the first end surface 32, the second end surface 33, the upper end surface 34, the lower end 35) and the periphery of the child door opening O Surfaces (first side surface 26, second side surface 27, upper surface 28, lower surface 29) are close to each other, and one or a plurality of locking portions protruding from one peripheral surface are provided on the other peripheral surface. The second door body 3 in the closed posture is restricted from rotating by being locked to one or a plurality of locked portions.

In one aspect, the second door 3 is provided with a latch that can be projected and retracted with respect to at least one of the first end surface 32, the second end surface 33, the upper end surface 34, and the lower end surface 35. A latch receiver is provided on which a latch protruding on at least one of the first side surface 26, the second side surface 27, the upper surface 28, and the lower surface 29 of the child door opening O is engaged. The latch is urged so as to maintain a protruding posture (locking posture). When the second door body 3 is closed, the latch receiver is formed on the peripheral surface of the child door opening O of the first door body 2. The latching position of the second door body 3 is maintained by the latch being locked. Latch lock release means (including handle release, mechanical release of push buttons, etc., electrical release based on switches and radio signals), which is a closed posture maintenance release means, to make the latch in the lock position into the retracted position Thus, the locked state of the second door body 3 is released, and the second door body 3 can be opened.

In another aspect, the first door body 2 is provided with a latch that can protrude and retract with respect to at least one of the first side surface 26, the second side surface 27, the upper surface 28, and the lower surface 29 of the child door opening O, A latch receiver is provided on which a latch protruding on at least one of the first end surface 32, the second end surface 33, the upper end surface 34, and the lower end surface 35 of the two-door body 3 is engaged. The latch is biased to maintain a protruding posture (locking posture), and when the second door body 3 is closed, the latch is locked to a latch receiver formed on the peripheral surface of the second door body 3. Thus, the closed posture of the second door body 3 is maintained. By making the latch in the locked position into the retracted position by the latch lock release means (including mechanical release of the handle operation, push button, etc., and electrical release based on a switch or a radio signal), the second door body 3 Thus, the second door body 3 can be opened.

In a more specific mode example, a latch L2 is incorporated in the door-end side portion of the first door body 2, and the latch L2 is retracted into the first side surface 26 with a locking posture protruding from the first side surface 26. When the second door 3 is in the closed posture, the latch L2 is locked to the latch receiver 320 formed on the first end surface 32 of the second door 3, so that the second door 3 is closed. The closed posture of the two-door body 3 is maintained (see FIG. 21). That is, the latch L2 serves as a closing posture maintaining means for the second door body 3. By operating the handle H to bring the latch L2 in the locked posture into the retracted posture, the locked state of the second door body 3 is released, and the second door body 3 can be opened.

The rotation support shaft P <b> 2 of the second door body 3 is offset from the center portion in the width direction of the second door body 3. By carrying out like this, in the state which the pressure is acting on the 1st finding surface 30 of the 2nd door body 3 in a fully-closed attitude | position, the 1st site | part (vertical passing through the rotation spindle P2) of the 2nd door body 3 is carried out. The area of the first finding surface 30 on the first end face 32 side of the line and the second part of the second part (the part on the second end face 33 side of the vertical line passing through the rotation support shaft P2). Since the area of the first finding surface 30 is unbalanced, the second door body 3 is rotated by the pressure difference by releasing the hold of the fully closed posture of the second door body 3. The biasing force in the closing direction of the second door body 3 is smaller than the rotational force due to the assumed pressure difference, and the second door body 3 in the closing position rotates due to the pressure difference. Return to the closed position with the urging force.

In the fully closed state of the opening, the pressure in the first space may become larger than the pressure in the second space due to the smoke exhausting equipment, the pressurized smoke prevention equipment, or the like. Can be open resistance. That is, in the fully closed posture, the first finding surface 20 of the first door body 2 and the first finding surface 30 of the second door body 3 are on the pressure surface side, and the second finding surface 21 of the first door body 2 is. The second finding surface 31 of the second door body 3 is the non-pressurized surface side. As shown in FIG. 22, in the present embodiment, a predetermined large pressure difference is generated between the first space and the second space in the fully closed state of the opening, and the first door body 2 and the second door body 3 are closed. When the pressure is applied so as to maintain the posture, the second door body 3 is released from holding the closed posture, so that the second door body 3 is rotated by the pressure difference acting on the first portion and the second portion. It rotates around the moving support shaft P2. When the second door body 3 is opened at a predetermined angle from the fully closed state of the opening, the first space and the second space communicate with each other to reduce the pressure difference. As described above, in this embodiment, when the internal / external differential pressure acts in the fully closed state of the opening, the second door 3 provided in the child door opening O of the first door 2 is used by using the differential pressure. Thus, the internal / external air pressure difference is eliminated, the opening force of the first door body 2 is reduced, and the first door body 2 can be fully opened with a lighter opening force.

The second door body 3 includes a rotation angle restricting means for restricting the rotation range (angle) of the second door body 3. In the present embodiment, the second door 3 rotates so that the first part on one side in the width direction protrudes toward the first space, and the second part on the other side protrudes toward the second space. By restricting the rotation angle of the door body 3 by the rotation angle restricting means, the first door body 2 and the second door body 3 are projected to a person or object located near the second door body 3 when in the closed posture. The second door body 3 is prevented from hitting as much as possible. As a rotation restricting means, when the second door body 3 is rotated to a predetermined angle, a contact portion (a contact portion provided separately from the eyeplate portion 8 described later) on which a portion of the second door body 3 abuts, The arm stopper 17 which regulates the rotation angle of the 2nd door body 3 can be illustrated. As shown in FIG. 10, the arm stopper 17 includes a first arm 170 and a second arm 171, and the first end of the first arm 170 is located above the first finding surface 30 of the second door 3 ( The first end of the second arm 171 is rotatable to the first finding surface 20 (the portion adjacent to the upper surface 28) of the first door body 2. The second end of the first arm 170 and the second end of the second arm 171 are rotatably connected. By selecting the mounting position of the arm stopper 17, the rotation range of the second door body 3 can be set.

[A-3] Door Device Opening Operation A rotation operation of the door device according to the present embodiment will be described with reference to FIG. FIG. 22A is a plan view of the door device in the closed posture, and both the first door body 2 and the second door body 3 are in the closed posture. A latch L1 protruding from the door end side end face 22 of the first door body 2 is engaged with the latch receiver 1000 of the door end side vertical frame 10 of the door frame 1, and the child door opening O of the first door body 2. The latch L2 protruding from the first side face 26 is locked to the latch receiver 320 formed on the first end face 32 of the second door body 3, so that the closed posture of the first door body 2 and the second door body 3 is fixed. (See FIG. 21). The first space has a higher pressure than the second space, and pressure (indicated by arrows) acts on the first finding surface 20 of the first door body 2 and the first finding surface 30 of the second door body 3. And this pressure becomes resistance of the opening operation of the 1st door body 2 (it opens a building opening part by rotating to the 1st space side).

In this state, when the handle H of the first door body 2 is turned, the protruding latch L1 is retracted into the door end side end surface 22 in conjunction with the operation of the handle H, and the door end side end surface of the first door body 2 is moved. The locking state of the door frame 1 of the door frame 1 with respect to the door end side vertical frame 10 is released, the protruding latch L2 is retracted into the first side surface 26, and the first door body 2 of the first end surface 32 of the second door body 3 is retracted. The locked state with respect to the first side face 26 is released. In one aspect, in conjunction with the turning operation of the handle H, the latch L1 and the latch L2 simultaneously change from the protruding posture to the retracted posture. In another aspect, not at the same time but in conjunction with the turning operation of the handle H, the latch L2 is changed from the protruding posture to the retracted posture before the latch L1.

At this time, the area of the second portion (the portion on the second end surface 33 side across the vertical line passing through the rotation support shaft P2) of the first finding surface 30 of the second door 3 is the first portion (the rotation support). Because the area is larger than the area of the first end face 32 side across the vertical line passing through the axis P2, the pressure difference acting on the first part and the second part of the first finding surface 30 of the second door 3 The second door body 3 is rotated so that the second part moves to the second space side and the first part moves to the first space side, and the child door opening O of the first door body 2 is partially When the air flows from the first space to the second space, the pressure difference between the first space and the second space is reduced, and the pressure acting on the first finding surface 20 of the first door body 2 is reduced. (FIG. 22B). When the second door body 3 is rotated by a predetermined angle due to the pressure difference, further rotation is restricted by the rotation restricting means. In the 2nd door body 3, the area of the site | part (2nd site | part) which protrudes to the space (2nd space) with small pressure is large. And in the aspect of illustration, the 2nd site | part with a large area is located in the door bottom side of the 1st door body 2, and the area (small width dimension is small) on the door-end side of the 1st door body 2 is small. Since one site | part is located, in the door-end side of the 1st door body 2, the protrusion amount to 1st space can be made small and safety | security can be ensured more. In the present embodiment, as shown in FIGS. 1 and 2, the second door body 3 is provided at the center in the width direction of the first door body 2, but the second door body 3 is provided as the first door. The second door body 3 that protrudes toward the first space may be prevented from hitting the operator during the opening operation of the first door body 2 by being biased and provided on the door 2 side in the width direction of the body 2.

By reducing the pressure difference between the first space and the second space, the first door body 2 can be easily rotated toward the first space, and the pressure difference between the first space and the second space is reduced. By becoming small, the 2nd door body 3 rotates to the direction which closes the opening part O for child doors of the 1st door body 2 by the urging | biasing force of a closing direction (FIG.22 (C)). When the pressure difference between the first space and the second space is substantially eliminated, the second door body 3 is closed by the biasing force in the closing direction, and the first door body 2 and the second door body 3 are integrated. (FIG. 22D). When the handle H of the opened first door body 2 is released and freed, the first door body 2 rotates integrally with the second door body 3 in the closing direction by the closing force of the door closer 15 and is closed. It becomes. When the opening is fully closed, the second door body 3 is maintained in the closed posture by the urging force in the closing direction at normal times (when there is substantially no pressure difference between the first space and the second space). Therefore, the 1st door body 2 and the 2nd door body 3 are open | released as integral.

[B] Airtight structure and fireproof structure [B-1] Peripheral part (first peripheral part) of first door body
The child door opening O includes a first part and a second part across a vertical line (rotation axis) passing through the rotation support shaft P2. In the present embodiment, the first part is a part on the first side face 26 side in the width direction, and the second part is a part on the second side face 27 side in the width direction. As shown in FIGS. 2 and 3, the first door body 2 is provided with a peripheral edge 4 along the peripheral edge of the first portion of the child door opening O. The peripheral portion 4 extends horizontally along the first portion of the lower surface 29, the vertical portion 40 extending vertically along the first side surface 26, the upper horizontal portion 41 extending horizontally along the first portion of the upper surface 28, and the first portion. The lower horizontal portion 42 is formed in a U shape in plan view. The peripheral edge 4 is fixed to the second finding surface 21 of the first door body 2 in the first portion (outer portion) in the width direction, and the second portion (inner portion) in the width direction is the child door opening. It protrudes into O. In FIG. 2, the finding surfaces 401, 411, and 421 of the peripheral edge 4 are shown, and in FIG. 3, only the second portion of the peripheral edge 4 is shown. As shown in FIGS. 4 and 5, the peripheral edge portion 4 (vertical portion 40, upper horizontal portion 41, lower horizontal portion 42) is projected on the second finding surface 21 of the first door body 2.

The peripheral edge portion 4 supports an airtight rubber 6 as an airtight member in the second portion (inner portion). The vertical part 40 of the peripheral part 4, the upper horizontal part 41, and the second part (inner part) of the lower horizontal part 42 are groove-shaped as an airtight rubber mounting part in which the airtight rubber 6 is mounted along the length direction. Pockets 400, 410, and 420 are formed. The pockets 400, 410, and 420 extend in a U-shape when viewed from the front, and the groove opens toward the first space. The airtight rubber 6 is formed in a U-shape in front view from the vertical portion 60, the upper horizontal portion 61, and the lower horizontal portion 62, and on the periphery of the first portion of the child door opening O of the first door body 2. It is provided along. The vertical portion 60 of the airtight rubber 6 is attached to the pocket 400, the upper horizontal portion 61 is attached to the pocket 410, and the lower horizontal portion 62 is attached to the pocket 420.

As shown in FIG. 5, the first portion (outer portion) of the vertical portion 40 of the peripheral edge portion 4 is fixed to the second finding surface 21 (the portion adjacent to the first side surface 26) of the first door body 2. The second portion (inner portion) is a groove-like pocket 400 facing the child door opening O. Therefore, the pocket 400 faces the one end portion in the width direction of the second finding surface 31 (the portion adjacent to the first end surface 32) of the first portion of the second door 3 in the closed posture, and is attached to the pocket 400. The vertical portion 60 of the airtight rubber 6 is in close contact with a portion adjacent to the first end surface 32 of the second finding surface 31 of the first portion of the second door 3 in the closed posture (see FIG. 18).

As shown in FIG. 4, the upper horizontal portion 41 has a first portion (outer portion) fixed to the second finding surface 21 (a portion adjacent to the upper surface 28) of the first door body 2, and the second portion ( The inner portion is a groove-like pocket 410 facing the child door opening O. Therefore, the pocket 410 is opposed to the upper end portion (the portion adjacent to the upper end surface 34) of the second finding surface 31 of the first portion of the second door 3 in the closed posture, and the airtight rubber attached to the pocket 410. The upper horizontal portion 61 of the 6 is in close contact with a portion adjacent to the upper end surface 34 of the second finding surface 31 of the first portion of the second door 3 in the closed posture (see FIG. 17A).

As shown in FIG. 4, the lower horizontal portion 42 has a first portion (outer portion) fixed to the second finding surface 21 (a portion adjacent to the lower surface 29) of the first door body 2, and the second portion. The (inner part) is a groove-like pocket 420 facing the child door opening O. That is, the pocket 420 is opposed to the lower end portion (the portion adjacent to the lower end portion 35) of the second finding surface 31 of the first portion of the second door 3 in the closed posture, and the airtight rubber attached to the pocket 420. 6 is in close contact with a portion adjacent to the lower end portion 35 of the second finding surface 31 of the first portion of the second door 3 in the closed posture (see FIG. 17A).

[B-2] Perimeter of second door (second perimeter)
The 2nd door body 3 consists of a 1st site | part and a 2nd site | part on both sides of the perpendicular line (rotation shaft core) which passes along the rotation spindle P2. In the present embodiment, the first portion is a portion on the first end face 32 side in the width direction (closes the first portion of the child door opening O when the second door body 3 is in the closed posture), and the second The part is a part on the second end face 33 side in the width direction (closes the second part of the child door opening O when the second door body 3 is in the closed posture). As shown in FIGS. 2 and 6, the second door body 3 is provided with a peripheral edge portion 5 along the peripheral edge of the second portion of the second door body 3. The peripheral portion 5 includes a vertical portion 50 extending vertically along the second end surface 32, an upper horizontal portion 51 extending horizontally along the upper end surface 34, and a lower horizontal portion 52 extending horizontally along the lower end portion 35. , And a U-shape in plan view. The peripheral portion 5 is fixed to the second finding surface 31 of the second door body 3 at the first portion (inner portion) in the width direction, and the second portion (outer portion) in the width direction is the second door body 3. Protrudes from the periphery. In FIG. 2, the finding surfaces 501, 511, and 521 of the peripheral portion 5 are shown, and in FIG. 6, only the second portion of the peripheral portion 5 is shown. As shown in FIG. 7 and FIG. 8, the peripheral edge portion 5 is projected on the second finding surface 31 of the second door body 3.

The peripheral portion 5 supports an airtight rubber 7 as an airtight member in the second portion (outer portion). A pocket 500 as an airtight rubber mounting portion in which the airtight rubber 7 is mounted along the length direction on the vertical portion 50 of the peripheral portion 5, the upper horizontal portion 51, and the second portion (outer portion) of the lower horizontal portion 52, 510, 520 are formed. The pockets 500, 510, and 520 extend in a U-shape when viewed from the front. The airtight rubber 7 is formed in a U-shape in front view from the vertical portion 70, the upper horizontal portion 71, and the lower horizontal portion 72, and is provided along the periphery of the second portion of the second door body 3. The vertical portion 70 of the airtight rubber 7 is attached to the pocket 500, the upper horizontal portion 71 is attached to the pocket 510, and the lower horizontal portion 72 is attached to the pocket 520.

As shown in FIG. 8, the vertical portion 50 has a first portion (inner portion) fixed to the second finding surface 31 (a portion adjacent to the second end surface 33) of the second door body 3, and the second portion. The (outer portion) is a groove-like pocket 500 protruding from the second end surface 33. That is, when the second door body 3 is in the closed posture, the pocket 500 faces a portion adjacent to the second side surface 27 of the second finding surface 21 of the second portion of the first door body 2, The vertical portion 70 of the attached airtight rubber 7 is in close contact with a portion adjacent to the second side surface 27 of the second finding surface 21 of the second portion of the first door body 2 (see FIG. 18).

As shown in FIG. 7, the upper horizontal portion 51 has a first portion (inner portion) fixed to the second finding surface 31 (a portion adjacent to the upper end surface 34) of the second door 3, and the second portion. The (outer part) is a groove-like pocket 510 protruding upward from the upper end surface 34. That is, when the second door body 3 is in the closed position, the pocket 510 faces the portion adjacent to the upper surface 28 of the second finding surface 21 of the second portion of the first door body 2 and is attached to the pocket 510. The upper horizontal portion 71 of the airtight rubber 7 is in close contact with a portion adjacent to the upper surface 28 of the second finding surface 21 of the second portion of the first door body 2 (see FIG. 17B).

As shown in FIG. 7, the lower horizontal portion 52 has a first portion (inner portion) fixed to the second finding surface 31 (a portion adjacent to the lower end portion 35) of the first door body 2. The portion (outer portion) is a groove-like pocket 520 that protrudes downward from the lower end portion 35. That is, when the second door body 3 is in the closed posture, the pocket 520 faces the portion adjacent to the lower surface 29 of the second finding surface 21 of the second portion of the first door body 2 and is attached to the pocket 520. The lower horizontal portion 72 of the airtight rubber 7 is in close contact with a portion adjacent to the lower surface 29 of the second finding surface 21 of the second portion of the first door body 2 (see FIG. 17B).

[B-3] Eyeplate Part Here, the upper horizontal part 41 (peripheral part 4) is arranged so that the peripheral parts 4 and 5 do not hinder the rotation of the second door 3 about the rotational support shaft P2. The end of the pocket 410) and the end of the upper horizontal portion 51 (pocket 510) of the peripheral edge 5 are separated from each other, and the end of the upper horizontal portion 61 of the airtight rubber 6 and the upper horizontal portion 71 of the airtight rubber 7 are separated from each other. Similarly, the end portion of the lower horizontal portion 42 (pocket 420) of the peripheral edge portion 4 and the end portion of the lower horizontal portion 52 (pocket 520) of the peripheral edge portion 5 are separated, and the lower horizontal portion of the airtight rubber 6 is separated. The end portion 62 is separated from the lower horizontal portion 72 of the airtight rubber 7. This separated portion is covered by the eyeplate portion 8.

When the second door body 3 is in the closed posture, the upper eye plate portion 8 is provided so as to straddle the tip of the upper horizontal portion 41 of the peripheral portion 4 and the tip of the upper horizontal portion 51 of the peripheral portion 5. The lower eyeplate portion 8 is provided so as to straddle the tip of the lower horizontal portion 42 and the tip of the lower horizontal portion 52 of the peripheral edge portion 5. In the present embodiment, the upper eye plate portion 8 is provided at the tip of the upper horizontal portion 41 of the peripheral edge portion 4, and the lower eye plate portion 8 is provided at the tip of the lower horizontal portion 42. In this embodiment, the structure of the upper eyeplate part 8 and the lower eyeplate part 8 is the same.

As shown in FIGS. 12 to 14, an airtight rubber 9 as an airtight member is provided at an intermediate portion in the width direction of the eyeplate portion 8, with the airtight rubber 9 being sandwiched, one being the first portion 8 </ b> A and the other being the first. There are two parts 8B. The first portion 8A is a fixed portion fixed to the tip of the upper horizontal portion 41 and the tip of the lower horizontal portion 42 of the peripheral edge portion 4, and the second portion 8B is when the second door body 3 is in the closed posture. The overlap portion covers the tip of the upper horizontal portion 51 and the tip of the lower horizontal portion 52 of the peripheral edge portion 5. The gap between the end of the upper horizontal portion 61 of the airtight rubber 6 and the end of the upper horizontal portion 71 of the airtight rubber 7, and the end of the lower horizontal portion 62 of the airtight rubber 6 and the lower horizontal portion of the airtight rubber 7 The gap between the ends of 72 is closed by the airtight rubber 9.

The airtight rubber 9 includes a front surface 90, left and right side surfaces 91 and 92, and a rear surface 93. The end portion of the upper horizontal portion 41 of the peripheral edge portion 4 and the end portion of the upper horizontal portion 61 of the airtight rubber 6 are in contact with the side surface 91 of the airtight rubber 9 of the upper eyeplate portion 8. The end portion of the portion 71 is in contact with the side surface 92 of the airtight rubber 9 of the upper eyeplate portion 8, and the end portion of the upper horizontal portion 51 of the peripheral edge portion 5 is the end of the airtight rubber 9 of the upper eyeplate portion 8. It is separated from the side surface 92. Note that the end portion of the upper horizontal portion 41 of the peripheral edge portion 4 may be separated from the side surface 91 of the airtight rubber 9. The end of the lower horizontal portion 42 of the peripheral edge 4 and the end of the upper horizontal portion 62 of the airtight rubber 6 are in contact with the side surface 91 of the airtight rubber 9 of the lower eyeplate portion 8. The end portion of the lower horizontal portion 72 is in contact with the side surface 92 of the airtight rubber 9 of the lower eye plate portion 8, and the end portion of the lower horizontal portion 52 of the peripheral edge portion 5 is the lower eye plate portion. It is separated from the side surface 92 of the eight airtight rubbers 9. Note that the end portion of the lower horizontal portion 42 of the peripheral edge portion 4 may be separated from the side surface 91 of the airtight rubber 9.

In the present embodiment, the eye plate portion 8 includes a first member 80 and a second member 81. The first member 80 includes a rectangular plate-like portion 800, and one end in the width direction of the plate-like portion 800 is bent vertically to form a side piece 801, and the other end 802 in the width direction is folded back in close contact. ing. The second member 81 includes a front portion 810, a first side piece 811 formed by bending one end of the front portion 810 in the width direction, and a second side piece 812 formed by vertically bending the other end of the front portion 810 in the width direction. And a bottom piece 813 extending in the width direction in a direction away from the first side piece 811 from the tip of the second side piece 812. The first side piece 811 of the second member 81 is brought into contact with the side piece 801 of the first member 80, and the bottom piece 813 of the second member 81 is brought into contact with the plate-like portion 800 of the first member 80 to be connected. A face plate portion 8 is formed.

The hermetic rubber 9 is fixed to the eye plate portion 8 so that the rear part (the rear part of the side surface 91 and the rear surface 93) of the hermetic rubber 9 is brought into contact with the bottom piece 813 and the second side piece 812. The height dimension of the eyeplate part 8 and the airtight rubber 9 is larger than the width dimension of the peripheral part 4 and the peripheral part 5.
The depth dimension of the airtight rubber 9 (the dimension between the front surface 90 and the rear surface 93) is larger than the thickness dimensions of the upper horizontal portions 61 and 71 and the lower horizontal portions 62 and 72 of the airtight rubbers 6 and 7. As described above, in the eyeplate portion 8, a portion located on the side surface 91 side of the airtight rubber 9 is the first portion 8A, and a portion located on the side surface 92 side is the second portion 8B. More specifically, a portion formed by one end side portion of the plate-like portion 800, the front portion 810, the first side piece 811 and the second side piece 812 is the first portion (fixed portion) 8A, and the plate A portion including the other end portion 802 of the shape portion 800 is a second portion (overlap portion) 8B. A screw hole 800a through which a screw S for fixing the eye plate portion 8 to the upper horizontal portion 41 and the lower horizontal portion 42 of the peripheral edge portion 4 is inserted into one end side portion of the plate-like portion 800 and the front portion 810, respectively. 810a is formed. The eye plate portion 8 is fixed with screws S by bringing the first portion (fixed portion) 8A (front portion 810) into contact with the finding surface 411 of the upper horizontal portion 41 and the finding surface 421 of the lower horizontal portion 42. (See FIG. 12B, FIG. 16, and FIG. 19A). When the second door body 3 is in the closed posture, the second portion (overlap portion) 8B of the eyeplate portion 8 is the tip of the finding surface 511 of the upper horizontal portion 51 of the peripheral edge portion 5 and the lower horizontal portion 52. It faces the tip of the finding surface 521. In the present embodiment, as shown in FIG. 19A, the airtight rubber 9 of the eye plate portion 8 is located closer to the first part than the rotation axis (rotation support shaft P2). The tip end of the second portion (overlap portion) 8B is positioned closer to the second part than the pivot axis (rotation support shaft P2). These positional relationships are only one embodiment, and the present invention is not limited to these positional relationships.

As shown in FIG. 19A, in this embodiment, the upper horizontal portion 41 of the peripheral edge portion 4, the end of the lower horizontal portion 42 (pockets 410 and 420), the upper horizontal portion 61 of the airtight rubber 6, and the lower side. The ends of the horizontal portion 62 are coincident with each other, and the upper horizontal portion 61 of the airtight rubber 6 and the end of the lower horizontal portion 62 are in contact with the side surface 91 of the airtight rubber 9. Note that the end portions of the upper horizontal portion 41 and the lower horizontal portion 42 of the peripheral edge portion 4 and the end portions of the upper horizontal portion 61 and the lower horizontal portion 62 of the airtight rubber 6 do not coincide with each other. You may space apart from the side surface 91 of the airtight rubber | gum 9 of the edge part of the horizontal part 42. FIG. On the other hand, the end portions of the upper horizontal portion 71 and the lower horizontal portion 72 of the airtight rubber 7 protrude from the end portions of the upper horizontal portion 51 and the lower horizontal portion 52 (pockets 510 and 520) of the peripheral edge portion 5. When the two-door body 3 is in the closed posture, the end portions of the upper horizontal portion 71 and the lower horizontal portion 72 of the airtight rubber 7 are in contact with the side surface 92 of the airtight rubber 9.

The upper half portion of the front surface 90 of the airtight rubber 9 of the upper eyeplate portion 8 is in close contact with the second finding surface 21 of the first door body 2, and the front surface 90 of the airtight rubber 9 of the lower eyeplate portion 8. The lower half is in close contact with the second finding surface 21 of the first door body 2. When the second door body 3 is in the closed position, the lower half portion of the front surface 90 of the airtight rubber 9 of the upper eyeplate portion 8 is in close contact with the second finding surface 31 of the second door body 3, and the lower side The upper half portion of the front surface 90 of the airtight rubber 9 of the eyeplate portion 8 is in close contact with the second finding surface 31 of the second door body 3 (see FIG. 16).

In the present embodiment, as shown in FIG. 19B, the ends of the upper horizontal portion 51 and the lower horizontal portion 52 (at least the pockets 510 and 520) of the peripheral edge portion 5 are inclined in plan view (second door 3). Are inclined edges 512, 522 extending from the second finding surface 31 to the airtight rubber 9 side toward the finding surfaces 511, 521 of the upper horizontal portion 51 and the lower horizontal portion 52. The inclined edges 512 and 522 are formed so that the pockets 510 and 520 of the upper horizontal portion 51 and the lower horizontal portion 52 are the second finding surface of the first door body 2 when the second door body 3 is rotated. 21 so as to prevent contact with biting. When the second door body 3 is in the closed posture, the second portion (overlapping) of the eyeplate portion 8 is located at the end of the upper horizontal portion 51 of the peripheral portion 5 and the finding surfaces 511 and 521 of the lower horizontal portion 52. Part) Plates 513 and 523 are fixed so as to face 8B (see FIG. 19B). The plates 513 and 523 are provided to narrow a gap between the upper horizontal portion 51 and the lower horizontal portion 52 of the peripheral edge portion 5 and the second portion (overlap portion) 8B of the eyeplate portion 8 as necessary.

[B-4] When the airtight second door body 3 is in the closed position, the first portion of the second finding surface 31 of the second door body 3 (the first line across the vertical line passing through the pivot shaft P2) The second part (inner part) of the peripheral part 4 is opposed to the three peripheral parts of the one end face 32 side, and the airtight rubber 6 is in close contact therewith. Specifically, as shown in FIG. 11, the second portion (inner portion) of the vertical portion 40 is opposed to the portion adjacent to the first end surface 32 of the second finding surface 31 and the vertical portion 60 is in close contact therewith. In addition, the second portion (inner portion) of the upper horizontal portion 41 is opposed to the portion adjacent to the upper end surface 34 of the second finding surface 31, and the upper horizontal portion 61 is in close contact with the second finding surface 31. The part adjacent to the lower end part 35 is opposed to the second part (inner part) of the lower horizontal part 42 and is in close contact with the lower horizontal part 62.

When the second door body 3 is in the closed position, the second portion of the second finding surface 21 of the first door body 2 (the portion on the second side surface 27 side across the vertical line passing through the rotation support shaft P2). The second portion (outer portion) of the peripheral portion 5 is opposed to the three peripheral portions, and the airtight rubber 7 is in close contact therewith. Specifically, as shown in FIG. 11, the second portion (outer portion) of the vertical portion 50 faces the portion adjacent to the second side surface 27 of the second finding surface 21 and the vertical portion 70 is in close contact therewith. The second portion (outer portion) of the upper horizontal portion 51 is opposed to the portion adjacent to the upper surface 28 of the second finding surface 21, and the upper horizontal portion 71 is in close contact with the lower portion of the second finding surface 21. 29, the second portion (outer portion) of the lower horizontal portion 52 faces and the lower horizontal portion 72 is in close contact.

The ends of the upper horizontal portion 61 and the lower horizontal portion 62 of the airtight rubber 6 provided on the peripheral edge portion 4 of the first door body 2 are respectively at the tips of the upper horizontal portion 41 and the lower horizontal portion 42 of the peripheral edge portion 4. The upper horizontal portion of the airtight rubber 7 provided on the peripheral edge portion 5 of the second door body 3 when the second door body 3 is in the closed position, in close contact with the side surface 91 of the airtight rubber 9 of the provided eyeplate portion 8. 71 and the edge part of the lower side horizontal part 72 are closely_contact | adhered to the side surface 92 of the airtight rubber | gum 9 of the eyeplate part 8 provided in the front-end | tip of the upper side horizontal part 71 and the lower side horizontal part 72 of the peripheral part 5, respectively.

The upper half of the front face 90 of the airtight rubber 9 of the upper eyeplate portion 8 is in close contact with the second finding surface 21 of the first door body 2, and when the second door body 3 is in the closed position, the upper eyeplate is closed. The lower half portion of the front surface 90 of the airtight rubber 9 of the portion 8 is in close contact with the second finding surface 31 of the second door 3, so that the end of the upper horizontal portion 61 of the airtight rubber 6 and the upper horizontal portion of the airtight rubber 7 are The front surface 90 of the airtight rubber 9 located in the gap with the end of the portion 71 blocks the gap between the upper surface 28 of the child door opening O of the first door body 2 and the upper end surface 34 of the second door body 3. In this way, the first door body 2 and the second door body 3 are in close contact with each other over the second door surface 21 and the second door 3. The lower half of the front face 90 of the airtight rubber 9 of the lower eyeplate portion 8 is in close contact with the second finding surface 21 of the first door body 2, and when the second door body 3 is in the closed position, The upper half of the front face 90 of the airtight rubber 9 of the eyeplate part 8 is in close contact with the second finding surface 31 of the second door body 3, so that the end of the lower horizontal part 62 of the airtight rubber 6 and the airtight rubber 7 The front surface 90 of the airtight rubber 9 located in the gap with the end of the lower horizontal portion 72 is between the lower surface 29 of the child door opening O of the first door 2 and the lower end 35 of the second door 3. These are closely adhered to the second finding surface 21 of the first door 2 and the second finding surface 31 of the second door 3 so as to close the gap.

In a state where the second door 3 closes the child door opening O of the first door 2, the three airtight rubbers 6 on the peripheral edge 4 of the first door 2 are the first part of the second door 3. The airtight rubber 7 on the three sides of the peripheral edge 5 of the second door body 3 is in close contact with the second finding surface 31, and is in close contact with the second finding surface 21 of the second part of the first door body 2, and the first door body. The end portions of the upper horizontal portion 61 and the lower horizontal portion 62 of the airtight rubber 6 provided on the peripheral edge portion 4 of the 2 are in close contact with the side surface 91 of the airtight rubber 9 of the eye plate portion 8, and the peripheral edge portion 5 of the second door body 3. The end portions of the upper horizontal portion 71 and the lower horizontal portion 72 of the hermetic rubber 7 provided on the side are in close contact with the side surface 92 of the hermetic rubber 9 of the eyeplate portion 8, and the hermetic rubber 9 is an opening for the child door of the first door body 2. A child door opening by closely contacting the second finding surface 21 of the first door 2 and the second finding surface 31 of the second door 3 so as to cover the gap between the portion O and the second door 3. An airtight structure is formed on the entire circumference of O.

[B-5] When the overlap structure second door body 3 is in the closed posture, the first part of the second finding surface 31 of the second door body 3 (with the vertical line passing through the rotation support shaft P2 sandwiched therebetween) The second part (inner part) of the peripheral part 4 is opposed to the three peripheral parts on the first end face 32 side. Specifically, as shown in FIG. 11, the second portion (inner portion) of the vertical portion 40 faces the portion of the second finding surface 31 adjacent to the first end surface 32, and the second finding surface. The second portion (inner portion) of the upper horizontal portion 41 is opposed to a portion adjacent to the upper end surface 34 of 31, and the lower horizontal portion 42 is disposed to a portion adjacent to the lower end portion 35 of the second finding surface 31. The 2nd part (inner part) of this is opposed.

When the second door body 3 is in the closed position, the second portion of the second finding surface 21 of the first door body 2 (the portion on the second side surface 27 side across the vertical line passing through the rotation support shaft P2). The second part (outer part) of the peripheral part 5 is opposed to the three peripheral parts. Specifically, as shown in FIG. 11, the second portion (outer portion) of the vertical portion 50 faces a portion adjacent to the second side surface 27 of the second finding surface 21, and the second finding surface. 21 is opposed to the second portion (outer portion) of the upper horizontal portion 51, and the portion adjacent to the lower surface 29 of the second finding surface 21 is the second portion of the lower horizontal portion 52. The two parts (outer parts) face each other.

When the second door body 3 is in the closed posture, the second portion (overlap portion) of the eyeplate portion 8 provided at the tip of the upper horizontal portion 41 and the lower horizontal portion 42 of the peripheral edge portion 4 of the first door body 2. 8B opposes the front ends of the upper horizontal portion 51 and the lower horizontal portion 52 of the peripheral edge portion 5 of the second door body 3. In the fully closed state of the opening, as shown in FIGS. 19A and 20A, the second portion (overlap portion) 8B of the eyeplate portion 8 and the upper horizontal portion 51 and the lower horizontal portion 52 of the peripheral portion 5 Among the light rays that enter from the gaps between the tips (plates 513 and 523), the light rays that are incident at the maximum angle on the second finding surfaces 21 and 31 of the first door body 2 and the second door body 3 The end A of the second portion (overlap portion) 8B and the end portion of the surface of the eyeplate portion 8 facing the second portion (overlap portion) 8B (on the airtight rubber side of the finding surface of the plates 513 and 523) It is a ray α connecting the end portion B). In the illustrated embodiment, the light ray α passes through the corner portion C formed by the first finding surface 20 and the first side surface 26 of the first door body 2 in plan view. In the corner portion C, the first finding surface 20 of the first door body 2 extends over the entire height of the first door body 2, and therefore the light ray incident at an acute angle (closer to parallel) than the light ray α is The second door body 2 is not blocked by the first side face 26 and goes straight to the first space side. Further, as shown in FIG. 20B, the eye plate portion 8 has a height dimension that covers the upper and lower gaps between the first door body 2 and the second door body 3. Therefore, in the vicinity of the rotation axis (rotation support shaft P2) (even when the airtight rubber 9 is melted by heat at the time of fire), the peripheral edge of the second door body 3 and the child of the first door body 2 It is possible to prevent a gap that directly penetrates the first space and the second space from occurring between the peripheral edge of the door opening O. If the plates 513 and 523 are not provided, the light rays enter from the gaps between the second portion (overlap portion) 8B of the eyeplate portion 8 and the tips of the upper horizontal portion 51 and the lower horizontal portion 52 of the peripheral portion 5. , The light ray incident at the maximum angle on the second finding surfaces 21 and 31 of the first door body 2 and the second door body 3 is the tip A of the second portion (overlap portion) 8B of the eyeplate portion 8. And an end portion of the face (the end portion of the upper horizontal portion 51 of the peripheral edge portion 5 and the end face of the lower horizontal portion 52) B ′ facing the second portion (overlap portion) 8B of the eyeplate portion 8. The ray β to be connected. As shown in FIG. 20A, the ray β passes through the side of the finding surface 30 of the second door 3 in plan view, and is found at the upper end and the lower end of the finding surface 30 of the second door 3. Unlike the surface 31 side, there is no peripheral portion that forms an overlap portion. Therefore, the gap between the upper end surface 34 of the second door body 3 and the upper surface 28 of the first door body 2, and the lower end surface 35 of the second door body 3. And the light ray β travels straight toward the first space from the gap between the first door body 2 and the lower surface 29 of the first door body 2. The light ray γ incident at an acute angle (more nearly parallel) than the light ray β is also a gap between the upper end surface 34 of the second door body 3 and the upper surface 28 of the first door body 2, and the lower end surface of the second door body 3. It goes straight from the gap between 35 and the lower surface 29 of the first door body 2 to the first space side.

When the second door body 3 is in the closed position, the eye plate portion 8 provided at the tip of the upper horizontal portion 41 of the peripheral edge portion 4 of the first door body 2 is the opening of the child door opening O of the first door body 2. These cover the second finding surface 21 of the first door body 2 and the second finding surface 31 of the second door body 3 so as to close the gap between the upper surface 28 and the upper end surface 34 of the second door body 3. The eye plate 8 provided at the front end of the lower horizontal portion 42 of the peripheral edge 4 of the first door 2 is connected to the lower surface 29 of the child door opening O of the first door 2 and the second door. 3 across the second finding surface 21 of the first door body 2 and the second finding surface 31 of the second door body 3 so as to close the gap between the three lower end portions 35.

In a state in which the second door 3 closes the child door opening O of the first door 2, the three second portions (inner portions) of the peripheral edge 4 of the first door 2 are the second door 3. The second finding surface 21 of the second part of the first door 2 is opposite to the second finding surface 31 of the first part, and the second part (outer part) of the peripheral part 5 of the second door 3 is the second part. The eye plate portion 8 provided at the tip of the upper horizontal portion 41 and the lower horizontal portion 42 of the peripheral edge portion 4 of the first door body 2 is opposed to the upper horizontal portion 51 and the lower portion of the peripheral edge portion 5 of the second door body 3. Opposite to the tip of the side horizontal portion 52, the eye plate portion 8 is a second finding of the first door body 2 so as to cover the gap between the child door opening O of the first door body 2 and the second door body 3. By facing the surface 21 and the second finding surface 31 of the second door body 3, an overlap structure is formed on substantially the entire circumference of the child door opening O. Accordingly, it is possible to prevent a gap that directly communicates the first space and the second space between the peripheral edge of the second door body 3 and the peripheral edge of the child door opening O of the first door body 2 during a fire. . Further, in the aspect in which the peripheral edge portions 4 and 5 and the eye plate portion 8 are provided with the airtight rubbers 6, 7, and 9, even if the airtight rubbers 6 and 7 are dissolved by heat at the time of fire, the second door body It is possible to prevent a gap that directly communicates the first space and the second space between the peripheral edge of 3 and the peripheral edge of the child door opening O of the first door body 2.

[C] Other Embodiments [C-1] Second Embodiment The second embodiment will be described with reference to FIGS. The difference between the first embodiment and the second embodiment described above is mainly the position of the rotation support shaft P2 in the width direction of the second door body 3, and the shape and configuration of the eyeplate portion 8 (including the airtight rubber 9). is there. In the second embodiment, the rotation support shaft P <b> 2 of the second door body 3 is provided on the side close to the first end surface 32, and the rotation support shaft in the child door opening O and the second door body 3 is provided. The area ratio of the left and right first parts and second parts across the vertical line (rotation axis) passing through P2 is different from the above-described embodiment. The eye plate part 8 has a first part (fixed part) 8A and a second part (overlap part) 8B with the airtight rubber 9 in between. The depth dimension of the airtight rubber 9 is the airtight rubber. The thickness dimensions of the upper and lower horizontal portions 61 and 71 and the lower horizontal portions 62 and 72 are the same as those in FIGS. Moreover, the edge part of the upper side horizontal part 51 of the peripheral part 5 and the lower side horizontal part 52 has reached the side surface 92 of the airtight rubber | gum 9, and does not have an inclination edge (512,522) or a plate (513,523). For other configurations, the description according to the first embodiment can be cited. The second finding of the first door body 2 and the second door body 3 in the light beam entering from the gap between the second portion (overlap portion) 8B of the eyeplate portion 8 and the lower horizontal portion 52 of the peripheral edge portion 5. Light rays incident on the surfaces 21 and 31 at the maximum angle face the tip A of the second portion (overlap portion) 8B of the eyeplate portion 8 and the second portion (overlap portion) 8B of the eyeplate portion 8. This is a ray α that connects the end (the end of the finding surface of the lower horizontal portion 52) B of the surface to be measured. In the illustrated embodiment, the light ray α passes through the corner portion C formed by the first finding surface 20 and the first side surface 26 of the first door body 2 in plan view. In the corner portion C, the first finding surface 20 of the first door body 2 extends over the entire height of the first door body 2, and therefore the light ray incident at an acute angle (closer to parallel) than the light ray α is The second door body 2 is not blocked by the first side face 26 and goes straight to the first space side.

[C-2] Third Embodiment A third embodiment will be described with reference to FIG. The difference between the first embodiment and the third embodiment described above is that, in the first embodiment, the peripheral edge portions 4 and 5 and the eye plate portion 8 (including the airtight rubber 9) are the first door body 2 and the second door body 3. In the third embodiment, the peripheral portions 4 and 5 and the eye plate portion 8 (including the airtight rubber 9) are provided in the first finding surface 21 and the second finding surface 31 side. This is a point provided on the first finding surface 20 and the second finding surface 30 side of the door body 2 and the second door body 3. As shown in FIG. 26, the lower horizontal portion 42 ′ of the peripheral edge portion 4 is provided on the first finding surface 20 of the first door body 2, and the first finding of the second door body 3 in the closed posture. Opposed to the surface 30 (the lower horizontal portion 62 of the airtight rubber 6 is in close contact with the first finding surface 30 of the second door 3). The eyeplate part 8 is provided at the tip of the lower horizontal part 42 '. The lower horizontal portion 52 ′ of the peripheral edge portion 5 is provided on the first finding surface 30 of the second door body 3, and when the second door body 3 is in the closed posture, the first view of the first door body 2. Opposing to the attachment surface 20 (the lower horizontal portion 72 of the airtight rubber 7 is in close contact with the first attachment surface 20 of the first door body 2). The side on which the peripheral edge portions 4 and 5 are provided is changed from the second finding surface 21 and the second finding surface 31 of the first door 2 and the second door 3 to the first finding surface 20 and the first finding surface 30. By replacing, the description according to the first embodiment can be used.

[C-3] Fourth Embodiment A fourth embodiment will be described with reference to FIG. The difference between the first embodiment and the fourth embodiment described above is that, in the first embodiment, the eye plate portion 8 (including the airtight rubber 9) is the tip of the upper horizontal portion 41 of the peripheral edge portion 4 of the first door body 2, In contrast to being provided at the tip of the lower horizontal portion 42, in the fourth embodiment, the eyeplate portion 8 (including the airtight rubber 9) is the peripheral portion 5 (in FIG. 27, the lower horizontal portion). Part 52 ″). As shown in FIG. 27, the end portion of the lower horizontal portion 52 ″ of the peripheral edge portion 5 of the second door body 3 is provided with an eye plate portion 8 (including an airtight rubber 9), and the second door body 3 is When in the closed posture, the eye plate portion 8 faces the end of the lower horizontal portion 42 ″ of the peripheral edge portion 4 of the first door body 2. The description according to the first embodiment can be used by replacing the side on which the eyeplate part (including the airtight rubber 9) is provided with the peripheral part 5 of the second door 3 from the peripheral part 4 of the first door 2. it can.

[C-4] Fifth Embodiment A fifth embodiment will be described with reference to FIG. The difference between the first embodiment and the fifth embodiment described above is that, in the first embodiment, the line (rotation axis) passing through the rotation support shaft P2 of the second door body 3 is a vertical line. In the fifth embodiment, the line (rotation axis) passing through the rotation support shaft P2 of the second door 3 is a horizontal line. The rotation support shaft P <b> 2 is in a position deviated with respect to the center of the height of the second door body 3. As shown in FIG. 28, the peripheral edge portion 4 of the first door body 2 is composed of a horizontal portion 40a and left and right vertical portions 40b and 40c, and the peripheral edge portion 5 of the second door body 3 is a horizontal portion 50a and left and right vertical portions. It consists of parts 50b and 50c. A line passing through the rotation support shaft P2 (rotation axis) changes from a vertical line to a horizontal line, and the configuration according to each element can be replaced with the description according to the first embodiment.

[C-5] Sixth Embodiment The sixth embodiment will be described with reference to FIG. The difference between the first embodiment and the sixth embodiment described above is that in the first embodiment, the second door body 3 opens and closes the child door opening O formed in the first door body 2 which is a movable partition body. On the other hand, in 6th Embodiment, 2nd door body 3 'opens and closes the opening part provided in the immovable division body (a wall and a fixed panel are included) 18 which divides 1st space and 2nd space. It is a point. The second door body 3 ′ is maintained in a closed posture by a closed posture maintaining means (e.g., latching by a latch), and a closed posture maintenance releasing means, for example, a latch locking release means (mechanical release such as a handle operation or a push button, The second door body 3 ′ is rotated by the differential pressure to release the differential pressure between the first space and the second space by releasing the closed posture maintenance by using a switch or an electrical release based on a radio signal). . The description according to the first embodiment can be used by replacing the child door opening O in the first embodiment with the opening.

[C-6] Note In the above-described embodiment, the eye plate portion 8 is prepared separately from the peripheral edge portion 4 to the peripheral edge portion 5 and is fixed to the peripheral edge portion 4 to the peripheral edge portion 5. The part 8 may be formed integrally with the peripheral part 4 or the peripheral part 5. For example, the eye plate portion 8 may be integrally formed at the tip of the upper horizontal portion 41 and the tip of the lower horizontal portion 42 of the peripheral edge portion 4. In this case, the upper horizontal portion 61 and the lower horizontal portion 62 of the airtight rubber 6 and the airtight rubber 9 of the eye plate portion 8 may be integrally formed. In the above description, “the first door body 2 is provided with the peripheral portion 4 along the peripheral edge of the first portion of the child door opening O (the portion on one side across the rotation axis). Thus, the second door 3 is provided with a peripheral portion 5 along the peripheral edge of the second portion of the second door 3 (the portion on the other side across the pivot axis). However, it does not exclude that the end of the peripheral edge 4 (airtight rubber 6) extends to the second part or the end of the peripheral edge 5 (airtight rubber 7) extends to the first part. Actually, in the present embodiment, the position of the airtight rubber 9 of the eyeplate portion 8 is deviated from the rotation axis (rotation support shaft P2), and the ends of the upper horizontal portion 51 and the lower horizontal portion 52 of the peripheral edge portion 5 are. And the end portions of the upper horizontal portion 71 and the lower horizontal portion 72 of the airtight rubber 7 extend to the first portion beyond the rotation axis (rotation support shaft P2). In the above-described embodiment, the second door body 3 is described as a rotating body that communicates the first space and the second space to relieve the differential pressure, and is used as a sliding door through which a person passes during evacuation or the like. Although not intended, it does not exclude that the second door body 3 is used as a sliding door.

DESCRIPTION OF SYMBOLS 1 Door frame 2 1st door body 20 1st finding surface 21 2nd finding surface 28 Upper surface (circumferential surface of the opening part for child doors)
29 Lower surface (surrounding surface of child door opening)
3 2nd door body 30 1st finding surface 31 2nd finding surface 4 Peripheral part (1st peripheral part)
40 Vertical part 41 Upper horizontal part 42 Lower horizontal part 400, 410, 420 Pocket 401, 411, 421 Finding surface 5 Peripheral part (second peripheral part)
50 Vertical portion 51 Upper horizontal portion 52 Lower horizontal portion 500, 510, 520 Pocket 501, 511, 521 Finding surface 6 Airtight rubber (first airtight member)
60 Vertical part 61 Upper horizontal part 62 Lower horizontal part 7 Airtight rubber (second airtight member)
70 Vertical part 71 Upper horizontal part 72 Lower horizontal part 8 Eyeplate part (cover part)
8A 1st part (fixed part)
8B 2nd part (overlap part)
9 Airtight rubber (edge airtight element)
O Child door opening P1 Rotating support shaft P2 Rotating support shaft (Rotating shaft core)

Claims (8)

An opening provided in a partition of the first space and the second space;
By rotating from a closed posture that closes the opening, the rotating body that communicates the first space and the second space to relieve the differential pressure,
The rotating body has a first part and a second part across a rotating shaft core,
The opening has a first part and a second part across the rotation axis, and when the rotating body is in a closed posture, the first part of the rotating body is located at the first part of the opening, The second part of the rotating body is located at the second part of the opening,
The partition has a first peripheral edge that is adjacent to the first part of the opening and that faces the finding surface of the first part of the rotating body in the closed posture,
The rotating body has a second peripheral edge that faces the finding surface of the partition adjacent to the second portion of the opening when the rotating body is in a closed posture;
Either one of the end of the first peripheral portion and the end of the second peripheral portion includes a cover portion that faces the finding surface of the other end when the rotating body is in the closed posture. Yes,
Differential pressure relief device.   2. The difference according to claim 1, wherein, when the rotating body is in a closed posture, the covering portion covers a gap formed between the rotating body and the peripheral surface of the opening in the vicinity of the rotating shaft. Pressure relief device.   The rotating shaft core is biased from the center of the rotating body so that the area of the first surface of the rotating body and the area of the second surface of the rotating body are different. The differential pressure reducing device according to claim 1.   The said rotating body is provided with the closing attitude maintenance means which controls rotation of the rotating body in a closed attitude, and the closing attitude maintenance cancellation | release means which accept | permits rotation of the rotating body from a closed attitude. The differential pressure relaxation device according to any one of the preceding claims.   The differential pressure mitigation device according to any one of claims 1 to 4, wherein a rotation angle of the rotating body is limited by a rotation angle restricting unit.   The difference according to any one of claims 1 to 5, wherein, when rotating from the closed posture, one of the first part and the second part of the rotating body protrudes into the first space and the other protrudes into the second space. Pressure relief device.   The difference according to any one of claims 1 to 6, wherein the partition body is a main door, the opening is a child door opening formed in the main door, and the rotating body is a child door. Pressure relief device. The first part of the rotating body is located on the door end side of the main door, the second part is located on the door bottom side of the main door, and the area of the finding surface of the second part is that of the first part. The differential pressure relaxation device according to claim 7, wherein the differential pressure relaxation device is larger than an area of the finding surface.

Images