JP2010242370A - Sealing latch mechanism for double-opening fire door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing latch mechanism of a double-opening fire door, allowing a person to push and open the double-opening door from both directions and extending freedom of evacuation action and satisfying the criteria of a fire-preventive construction. <P>SOLUTION: In a door body 1, collision stop surfaces 9a, 12a of latch bolts 9, 12 in lock devices 5, 6 are usually made to abut on abutting faces 20a, 21a of latch receiving recessed parts 20, 21, respectively. Usually, a free end 4 of the door body 1 is in a closed state of elastically abutting on a sealing member 7 and the section between the free end 4 of the door body 1 and a frame body 2 of a building is sealed to prevent smoke or the like from being circulated indoors and outdoors. When pushing handles 8, 11 located inside and outside the door body 1 outward or inward, the latch bolts 9, 12 are retracted into lock boxes 10, 13, and the door body 1 is unlocked and can be pushed and opened in both directions. The door body 1 returns automatically, and the collision-stop-surfaces 9a, 12a of the latch bolts 9, 12 in the lock devices 5, 6 are abutted on the abutting faces 20a, 21a of the latch receiving recessed parts 20, 21 to hold it at a closing position again. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a double-opening fire door that can be opened and closed on both sides inward and outward while having airtightness for satisfying the requirements as a fireproof structure around a door body.

In order to build a door body as a fireproof structure in a building, there must be no gaps through which flames, hot air and smoke pass between the door body and the frame of the building to which it is attached. Therefore, in order to realize a fire prevention structure, it is necessary to attach a door-to-door crossing that overlaps the door main body within a certain range to the building frame. In this case, the door body is inevitably opened and opened only in one of the front and rear directions without door-to-door bars.
In normal use, while satisfying the requirements of a fire-proof door with one-way opening in the front-rear direction, the door body can be opened in the reverse direction in the front-rear direction when normal for disasters. A possible fire door device is described in US Pat. In this fire door device, a vertical frame and a horizontal frame are respectively attached to the left and right side edges and the upper edge of the building frame. A vertical door stopper and a horizontal door stopper are rotatably attached to the vertical frame and the horizontal frame, respectively, via hinge fittings. The vertical door stopper is rotatable and is locked by a latch lock mechanism. The latch lock mechanism is released by operating the horizontal door stopper to retract from the door body, and the left and right vertical door stoppers can also be rotated in the direction of retracting from the door body. It is possible to open the door body in the backward and forward direction by retracting the vertical door.

JP 2005-180125 A

In the above conventional fire door device, the vertical and horizontal door-to-door bars are configured to be retractable by rotating with hinges, and if necessary, an operation for retracting the door-to-door bars is performed so that the door doors exist. The door can be opened. Therefore, it cannot always be pushed in both directions. For this reason, in the event of an emergency, since no one can push the door from any direction, there is a problem of lack of flexibility in evacuation behavior.
Therefore, in the invention according to this application, anyone can always open the door from any direction, and therefore, it is possible to expand the freedom of evacuation action and satisfy the standard of fire prevention structure. It aims at providing the sealing latch mechanism of a fire door.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
The sealing latch mechanism 3 of the double-opening fire door of the invention according to this application for solving the above-described problems is openable and closable both inward and outward, and is rotationally biased so as to return to the closed position. It is provided on the free end 4 side of the door body 1 in the double-open fire door attached to the frame body 2. The sealing latch mechanism 3 includes a door body 1, first and second locking devices 5, 6 attached to the free end 4 of the door body 1 side by side, and the free end 4 of the door body 1 in the closed position. And a sealing member 7 attached to the building frame 2 side so as to be elastically abutted to the building. One of the first and second locking devices 5, 6 is a locking mechanism that unlocks the latch bolt 9 by retracting it into the lock box 10 by pushing the handle 8 provided inside the door body 1 outward. Have The latch bolt 9 has an outwardly facing stop surface 9 a, and the stop surface 9 a is provided so as to be arranged at the center in the thickness direction at the free end 4 of the door body 1. The other locking device 6 has a locking mechanism that retreats the latch bolt 12 into the lock box 13 and unlocks it by pushing a handle 11 provided outside the door body 1 inward. The latch bolt 12 has an inward stop surface 12 a, and is provided so that the stop surface 12 a is disposed at the center in the thickness direction at the free end of the door body 1. The sealing member 7 slidably contacts the free end 4 of the door body 1 to allow the door body 1 to open and close, and a first portion that receives the two latch bolts 9 and 12 at the closed position of the door body 1. The second two latch receiving recesses 20 and 21 are provided. The first latch receiving recess 20 has an inward contact surface 20a with which the outward stop surface 9a of the first locking device 5 contacts, and the second latch receiving recess 21 has a second locking surface. The device 6 has an outward contact surface 21a against which the inward stop surface 12a contacts.

  According to the device of the invention relating to this application, the door main body 1 normally has the first and second locking surfaces 9a and 12a of the latch bolts 9 and 12 in the first and second locking devices 5 and 6, respectively. The two latch receiving recesses 20 and 21 are in contact with the contact surfaces 20a and 21a, and the free end 4 is in elastic contact with the sealing member 7 in a closed state. In this state, the space between the free end 4 of the door body 1 and the frame 2 of the building is sealed, so that smoke or the like does not circulate inside or outside. When the handles 8 and 11 provided on the inner side and the outer side of the door body 1 are pushed outward or inward, the latch bolts 9 and 12 are retracted into the lock boxes 10 and 13 to unlock the door body 1 and the door. The main body 1 can be pushed open both inward and outward. The opened door body 1 automatically returns in the closing direction, and the locking surfaces 9a, 12a of the latch bolts 9, 12 in any of the locking devices 5, 6 are the contact surfaces 20a, 21a of the latch receiving recesses 20, 21. To the closed position again.

It is a schematic explanatory drawing of the sealing latch mechanism of the double door fire door which concerns on this invention. It is a front view of the principal part of the sealing latch mechanism of FIG. (A) is the IIIa-IIIa sectional view in FIG. 2, (b) is the IIIb-IIIb sectional view in FIG. (A) is a partially enlarged view of FIG. 3 (a), (b) is a partially enlarged view of FIG. 3 (b). It is a side view of a door body. It is a side view of a sealing member.

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the door body 1 attached to the building frame 2 can be opened and closed in both the inner direction (front side of the paper surface) and the outer side (depth direction of the paper surface) with the left end side as a suspension, and returns to the closed position. It is urged to rotate. The sealing latch mechanism 3 is provided on the free end 4 side of the door body 1.

  The sealing latch mechanism 3 includes first and second locking devices 5 and 6 and a sealing member 7. The locking devices 5 and 6 are attached to the free end 4 of the door body 1 side by side. The sealing member 7 is urged so as to elastically contact the free end 4 of the door body 1 in the closed position, and is attached to the building frame 2 side.

  As shown in FIGS. 2, 3 (a), and 4 (a), the first locking device 5 is not shown as a lever 8 a by pushing the handle 8 provided inside the door body 1 outward. It has a lock mechanism for reversing the latch bolt 9 into the lock box 10 via the internal mechanism. The latch bolt 9 has an outwardly facing stop surface 9a, and is arranged so that the stop surface 9a is located at the center in the thickness direction at the free end of the door body. As a locking device having such a locking mechanism, a push-pull lock manufactured by Miwa Lock Co., Ltd. can be used (for example, JP-A-2003-74245). Description of the detailed structure of the locking device 5 is omitted. The other locking device 6 is the same, and as shown in FIG. 3 (b), by pushing the handle 11 provided outside the door body 1 inward, the latch bolt 12 is moved via the lever 11a. It has a lock mechanism that is retracted into the lock box 13 and unlocked. As shown in FIG. 4B, the latch bolt 12 has an inward stop surface 12a, and the stop surface 12a is arranged at the center in the thickness direction at the free end 4 of the door body. Is provided.

  The free end 4 of the door body 1 has a pair of ridges 14 projecting from the inner edge and the outer edge toward the frame 2 of the building and extending in the vertical direction, and a vertical line formed between the two ridges 14, 14. A groove 15 is provided.

  The sealing member 7 is provided along the free end 4 of the door body 1 in the closed position so as to extend in the vertical direction on the frame body 2 of the building. The sealing member 7 has a plurality of push bars 16 extending horizontally to the frame body 2 side. The push bar 16 is supported by a guide member 17 provided on the frame 2 so as to be movable in the axial direction. On the outer periphery of the push bar 16, a spring 18 is fitted between the sealing member 7 and the guide member 17 and urged so as to press the sealing member 7 against the free end 4 of the door body 1. As shown in FIGS. 3, 4, and 6, the sealing member 7 has a bulging portion 19 and first and second latch receiving recesses 20 and 21. The bulging portion 19 is pressed against the free end 4 when the door body 1 is closed, and is slidably contacted with the free end 4 during the opening / closing operation to allow the operation. The first and second latch receiving recesses 20 and 21 receive the two latch bolts 9 and 12 in the closed position of the door body 1.

  The bulging portion 19 of the sealing member 7 has an arc shape in cross section and elastically slides on the protrusion 14 of the door body 1 to allow the door body 1 to open and close. Abutting against the bottom surface of the groove 15, the space between the door body 1 and the frame body 2 is sealed.

  As shown in FIGS. 4 (a), 4 (b), and 6, the first latch receiving recess 20 has an inward contact surface 20a with which the outward stop surface 9a of the first lock device 5 contacts. The second latch receiving recess 21 has an outward contact surface 21a with which the inward contact surface 12a of the second locking device 6 contacts. The latch receiving recesses 20, 21 allow a part of the bulging part 19 to be inward so as to allow the latch bolts 9, 12 to enter until the latch bolts 9, 12 are in contact with the contact surfaces 20 a, 21 a at the closed position of the door body 1 Or it cuts outward and is formed.

  Although not shown, appropriate sealing measures are also taken between the end of the door body 1 on the suspending side and between the upper and lower ends and the frame 2 of the building.

  In the closed state of the door body 1 shown in the figure, the latching surfaces 9a and 12a of the latch bolts 9 and 12 of the locking devices 5 and 6 are in contact with 20a and 21a of the sealing member 7, and the free end 4 and the building frame The body 2 is sealed with a sealing member 7. Therefore, smoke or the like does not circulate inside or outside from here.

  Now, when the handle 8 of the first lock device 5 is pushed from the inside of the door body 1, the drive lever 8a rotates to drive the lock mechanism, and the latch bolt 9 is retracted into the lock box 10 to receive the latch. Since the engagement with the recess 20 is released, the door body 1 can be pushed outward while pushing the sealing member 7. When the door body 1 is pushed open and left unattended, a closer (not shown) works and the door body 1 returns to the closing direction. At this time, the restored latch bolt 9 is pushed into the lock box 10 while sliding the inclined surface 9 b against the sealing member 7, and protrudes again into the latch receiving recess 20 when the apex of the bulging portion 19 is exceeded. At substantially the same time, as shown in FIG. 4B, the stop surface 12a of the latch bolt 12 of the second locking device 5 contacts the contact surface 21a of the latch receiving recess 21, and the door body 1 is Held in the closed position.

  On the other hand, when the handle 11 of the second locking device 6 is pushed from the outside of the door main body 1, the latch bolt 12 and the latch receiving recess 21 are disengaged. It can be pushed inward while pushing. When the door body 1 is pushed open and left unattended, the door body 1 returns to the closing direction. At this time, the latch bolt 12 is pushed into the lock box 10 while sliding the inclined surface 12 b against the sealing member 7, and when it exceeds the top of the bulging portion 19, it protrudes again into the latch receiving recess 21 by the spring force. . At substantially the same time, as shown in FIG. 4A, the stop surface 9a of the latch bolt 9 of the first locking device 5 contacts the contact surface 20a of the latch receiving recess 20, and the door body 1 is Held in the closed position.

  Therefore, even if the door body 1 is pushed open in any direction, the door body 1 is automatically closed and always stopped and held in the closed position.

DESCRIPTION OF SYMBOLS 1 Door body 2 Building frame 3 Sealing latch mechanism 4 Free end 5 First locking device 6 Second locking device 7 Sealing member 8 Handle 8a Lever 9 Latch bolt 9a Slope 10b Slope 10 Lock box 11 Handle 12 Latch Bolt 12a Stopping surface 12b Slope 13 Lock box 14 ridge 15 ridge 16 push bar 17 guide member 18 spring 19 bulging portion 20 first latch receiving recess 20a abutting surface 21 second latch receiving recess 21a abutting surface

Claims (3)

It can be opened and closed in both inward and outward directions, and is provided on the free end side of the door body in the double-open fire door that is rotationally biased to return to the closed position and attached to the frame of the building,
Two first and second locking devices attached to the free end of the door body side by side;
A sealing member that is biased to elastically contact the free end of the door body in the closed position and is attached to the building frame body side;
One of the first and second locking devices has a locking mechanism that unlocks the latch bolt by retracting it into the lock box by pushing a handle provided inside the door body outward. It is provided so that the outward stop surface of the bolt is arranged at the center in the thickness direction at the free end of the door body,
The other of the first and second locking devices has a locking mechanism that unlocks the latch bolt by retracting it into the lock box by pushing a handle provided outside the door body inward. It is provided so that the inward stop surface of the bolt is arranged at the center in the thickness direction at the free end of the door body,
The sealing member slidably contacts the free end of the door body to allow the door body to open and close, and the first and second locking device latch bolts in the closed position of the door body. 1. It has a second latch receiving recess,
The first latch receiving recess of the sealing member has an inward contact surface with which an outward stop surface of the latch bolt in the one locking device contacts,
The double latch fire door sealing latch mechanism, wherein the second latch receiving recess of the sealing member has an outward contact surface with which an inward stop surface of a latch bolt in the other locking device contacts. . The door body includes a pair of protrusions extending from the inner edge and the outer edge of the free end to the building frame and extending in the vertical direction, and a vertical groove formed between the protrusions at the free end. And
When the door body is opened and closed, the bulging portion of the sealing member elastically slides on the ridge to allow the door body to open and close, and abuts against the bottom surface of the groove in the closed position of the door body. The double latch fire door sealing latch mechanism according to claim 1.   The bulging portion of the sealing member is formed in an arc shape in cross section, and the first and second latch receiving recesses enter until the latch bolt contacts the contact surface at the closed position of the door body. 2. The double latch fire door sealing latch mechanism according to claim 1, wherein a part of the bulging portion is cut out inward or outward so as to allow for this.

Images