JP2011157763A - Door unlocking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door unlocking device which enables a door to be easily opened without causing intermeshing, even when a room interior is brought into a high pressure state by a jet of fire extinguishing gas and the like. <P>SOLUTION: A latch mechanism (unlocking device) 27 includes a strike 40 which is provided on one of the opposed surfaces 21a and 22a, joined to each other, of the pair of doors 21 and 22, and a latch 35 which is provided on the other one and which can protrude from/recede into the strike 40. The latch mechanism (unlocking device) 27 is also provided with a roller 50 which abuts on the latch 35 making an entry into the strike 40 and which can be rotated in the protruding/receding direction of the latch 35. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a door unlocking device that can easily unlock a door even when the interior of the chamber becomes high pressure by supplying gas.

  2. Description of the Related Art Conventionally, in a facility equipped with precision equipment such as a large computer and a server, a fire extinguishing system is known that quickly extinguishes fire in order to protect precision equipment when a fire or the like occurs in a room.

  In this fire extinguishing system, fire extinguishing gas is generally used as a fire extinguishing agent because, when extinguishing with water or a chemical fire extinguishing agent, the device may be damaged or malfunction or malfunction may occur. As an example of this fire extinguishing system, for example, Patent Document 1 discloses a gas fire extinguishing facility that injects and fills a room with a fire extinguishing gas composed of an inert gas such as nitrogen gas, carbon dioxide gas, and halogen gas or a nonflammable gas. ing.

  In such a gas fire extinguishing system, a large amount of fire extinguishing gas is filled in a room in a short time to quickly extinguish the fire. Therefore, since the room becomes a high pressure in a short time, a high pressure by the high-pressure gas is applied to the door for entering and exiting the room.

  Here, for example, a latch mechanism is provided in the fire door provided in the room in which the precision instrument is installed. The latch mechanism is configured such that a strike provided on one door engages a latch bolt provided on the other door. For example, in the door lock device described in Patent Document 2, a spring member is provided at the base of the latch bolt, and the spring member is operated by pressing the door by operating a knob or lever handle or pushing the door. The latch bolt is retracted and removed from the strike so that the door can be opened.

JP 2000-60984 A JP 2000-240341 A

  However, when a high-pressure fire extinguishing gas is injected (spouted) into the room at the time of a fire as described above, high-pressure is instantaneously applied to the fire door that divides the room where the equipment is installed and the external space such as a corridor. Is done. For this reason, there was a possibility that the fire door could not be opened due to deformation. That is, for example, as shown in FIGS. 3 and 4, when the high-pressure P is applied to the fire door 1, the doors 2 and 3 are bent and deformed, and an excessive force is applied to the latch mechanism 4, thereby The hinge 5 is deformed, the rank 5 is deformed, the order adjuster 6 is broken or caught, the door check 7 is broken, or the joinery frame (door frame) 8 is deformed. Even if the lever handle (handle 9) is operated, the fire door 1 (doors 2 and 3) may not be opened.

  If the fire door 1 is not opened in this way, an evacuation route cannot be secured or the secondary fire extinguishing activity will be hindered, so fire extinguishing gas is injected into the room R1 and high pressure P is loaded. Even in such a case, there has been a strong demand for ensuring that the fire door 1 can be opened and closed.

  In view of the above circumstances, an object of the present invention is to provide a door unlocking device capable of reliably opening and closing a fire door even when a fire extinguishing gas is injected into the room and a high pressure is applied. And

In order to solve the above problems, the present invention proposes the following means.
That is, the door unlocking device according to the present invention includes a strike provided on any one of the facing surfaces of the pair of doors that are joined to each other, and a latch provided on the other and capable of moving forward and backward with respect to the strike. The door unlocking device is characterized in that a rotating member is provided which contacts the latch that has advanced into the strike and is rotatable in the advancing and retracting direction of the latch.

  According to the door unlocking device having such a feature, even when the interior is at a high pressure and a pressure is applied to the door in the opening direction, the rotating member smoothly moves the latch forward and backward. Therefore, it is possible to avoid the bite between the latch and the strike.

In the door unlocking device according to the present invention, it is preferable that the rotating member is provided on a wall surface side facing the direction opposite to the door opening direction of the door in the strike.
As a result, the advance and retreat operation of the latch that has advanced into the strike can be facilitated, and further, the contact between the latch and the strike can be avoided, so that the engagement between the latch and the strike can be reliably prevented. it can.

Furthermore, in the door unlocking device according to the present invention, it is preferable that the rotating member is a roller that is rotatable about an axis along the height direction of the door.
Since the roller abuts on the latch and the roller rotates as the latch advances and retracts, the engagement between the latch and the strike can be more reliably prevented.

  According to the present invention, since the rotating member that contacts the latch and rotates in the forward / backward direction of the latch is provided, it is possible to avoid the engagement between the latch and the strike at the time of indoor high pressure. It is possible to easily open the door without locking the forward and backward movement.

It is a principal part fracture perspective view which shows the unlocking device of the fire door which concerns on embodiment of this invention. It is a horizontal sectional view which shows the unlocking apparatus shown in FIG. It is a front view which shows the conventional fire door. It is a top view which shows the conventional fire door.

  Hereinafter, with reference to FIG.1 and FIG.2, the fire door structure which concerns on embodiment of this invention is demonstrated.

  First, as shown in FIGS. 1 and 2, the fire door 20 of the present embodiment includes a room R1 such as a room in which a precision device such as a large computer or a server is installed, a clean room in which a semiconductor manufacturing apparatus is installed, and the room R1. It is installed to be openable and closable so as to communicate / partition with an external space R2 such as a corridor connected through a door opening formed in the wall. Further, the chamber R1 is provided with a gas fire extinguishing system that injects an inert gas such as nitrogen gas, carbon dioxide gas, and halogen gas or a nonflammable gas (fire extinguishing gas) at a high pressure when a fire occurs.

  And the fire door 20 of this embodiment is provided so that chamber R1 and external space R2 may be divided. The fire door 20 is a double door with a pair of doors 21 and 22, and the doors 21 and 22 can be opened and closed by hinges 23, respectively. The opening direction F of the fire door 20 is a direction from the chamber R1 toward the external space R2.

  Further, flange portions 21b and 22b that extend to and come into contact with the surfaces of the doors 21 and 22 that are paired with each other are provided on the opposing surfaces 21a and 22a that are the joints of the closed states of the doors 21 and 22, respectively. By facing these flange portions 21b and 22b, the facing surfaces 21a and 22a of the doors 21 and 22 are covered. In the state where the doors 21 and 22 shown in FIGS. 1 and 2 are closed, a small space 33 is formed between the facing surfaces 21a and 22a of the doors 21 and 22.

  A recess 34 is formed in the facing surface 22a of the other door 22, and a latch 35 is provided in the recess 34 so as to be able to advance and retract. The latch 35 is disposed on the base side of the latch bolt 36 so as to be able to advance and retract so as to protrude from the facing surface 22a of the door 22, and urges the latch bolt 36 in the advance direction. It comprises a coil spring (not shown) as an elastic member.

  The latch bolt 36 in the latch 35 has a tapered surface 36a facing the side opposite to the door opening direction F, that is, the chamber R1 side at the tip thereof. Further, an outer surface 36b extending in the advancing / retreating direction of the latch 35 is connected to an end portion of the tapered surface 36a on the outer space R2 side, and an end portion on the chamber R1 side of the tapered surface 36a is also extended in parallel to the inclined axis L1. The inner side surface 36c is connected.

  Note that the latch 35 may be provided with an elastic member such as a sponge, rubber, or spring having high strength and durability, and a high elastic compression force and restoring force, instead of the coil spring.

  Further, a strike 40 is formed on the facing surface 21a of the one door 21. The strike 40 has a concave shape that allows the latch bolt 36 to advance and lock. The strike 40 has a substantially U-shape that opens to the opposing surface 21a, and is configured to have a dimension that can receive the advancing latch bolt 36. A wall surface 40a facing the opening direction F of the strike 40, that is, the chamber R1 side is opposed to an outer surface 36b of the latch bolt 36 with a slight gap.

  Further, on the base side of the latch 35, there is provided a well-known coupling mechanism (not shown) as shown in the prior art connected to the above-described lever handle, door knob or the like. Therefore, the latch 35 can be retracted from the strike 40 by rotating the lever handle or the door knob, whereby the latch mechanism 27 can be unlocked and the fire door 20 can be opened.

  In the present embodiment, one door 21 is formed with a roller storage recess 51 that opens in the wall surface 40 a of the strike 40, and a roller (rotary body) 50 is provided in the roller storage recess 51. .

  The roller 50 is supported so as to be rotatable around the rotation axis O along the height direction of the doors 21 and 22, and a part of the outer peripheral surface of the roller 50 protrudes to the outside of the roller storage recess 51. That is, it is installed so as to protrude from the wall surface 40 a of the strike 40. The protrusion amount of the outer peripheral surface of the roller 50 from the wall surface 40 a is set to be approximately the same as the facing distance between the outer surface 36 b of the latch 35 that has advanced into the strike 40 and the wall surface 40 a of the strike 40. As a result, the latch 35 that has advanced into the strike 40 has its outer surface 36b in contact with the outer peripheral surface of the roller 50, and the roller 50 rotates as the latch 35 advances and retreats.

Next, the operation of the latch mechanism 27 in the fire door 20 having the above configuration will be described.
When the latch mechanism 27 of the doors 21 and 22 of the fire door 20 is closed, the latch bolt 36 provided on the other door 22 protrudes from the recess 34 due to the elasticity of the coil spring, and the latch bolt 36 is in one door. It has advanced into 22 strikes 40 and closed.

  When an operator enters and exits between the chamber R1 and the external space R2, the latch 35 is moved backward via a coupling mechanism (not shown) by rotating a lever handle, for example. Thus, when the latch bolt 36 is retracted from the strike 40, the latch mechanism 27 is in an open state, and the operator can enter and exit by opening the other door 22 to the external space R2.

  Then, when the latch mechanism 27 of the fire door 20 is in the closed state, for example, a fire occurs in the chamber R1, and when high-pressure fire extinguishing gas is injected at high speed from the gas injection port provided in the chamber R1, The fire extinguishing gas fills the room R1 in a short time, and the fire is extinguished. At this time, high pressure is instantaneously applied to the fire door 20 that partitions the chamber R1 and the external space R2 toward the door opening direction F.

  Here, for example, assuming that there is no roller 50, when pressure is applied in the door opening direction F as described above, the wall surface 40a of the strike 40 and the outer surface 36b of the latch bolt 36 have a large pressing force. Because of the abutment, the wall surface 40a and the outer surface 36b may be locked by engagement so that the door cannot be easily opened.

  On the other hand, in this embodiment, since the roller 50 is arrange | positioned so that a part of outer peripheral surface may protrude from the wall surface 40a of the strike 40, it fills with fire extinguishing gas at the time of the fire outbreak in the chamber R1. Even when the pressure is applied to the fire door 20, the roller 50 abuts on the latch 35, and the roller 50 rotates as the latch 35 advances and retreats, thereby ensuring the advance / retreat operation of the latch 35. Can do.

  Further, particularly in the present embodiment, the roller 50 is provided on the side of the wall surface 40a facing the direction opposite to the door opening direction F of the doors 21 and 22 in the strike 40, so that pressure is applied to the doors 21 and 22. Therefore, the abutment between the latch 35 and the wall surface 40a can be avoided, and the smooth advance / retreat operation of the latch 35 that has advanced into the strike 40 can be ensured.

  As described above, in the present embodiment, since the roller 50 facilitates the advance and retreat operation of the latch 35 in the strike 40, it is possible to avoid the engagement and locking of the latch 35 and the strike 40, Even when the inside of the chamber R1 is in a high pressure state, the latch mechanism (unlocking device) 27 can be unlocked. Therefore, since the doors 21 and 22 can be opened easily, an evacuation route for the collector can be secured to ensure safety.

The embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, in the present embodiment, an example in which the roller 50 is employed as a rotating member that contacts the latch 35 and rotates in the forward / backward direction of the latch 35 has been described. Any other member may be adopted as long as it can rotate with the advancement and retraction of the latch 35.

For example, the latch mechanism (unlocking device) 27 is not limited to the fire door 20 and can be applied to a door that is not the fire door 20.
Further, the latch mechanism 27 in the fire door 20 may be disposed at any position in the vertical direction of the opposing surfaces 21a and 22a of the pair of doors 21 and 22, and is not limited to the shape of the door, and any style, It is also possible to apply to the aspect door.

20 Fire door 21 Door 21a Opposing surface 22 Door 22a Opposing surface 27 Latch mechanism (unlocking device)
34 Recess 35 Latch 36 Latch bolt 36b Outer side surface 36c Inner side surface 40 Strike 40a Wall surface 50 Roller 51 Roller storage recess F Door opening direction O Rotating axis R1 Chamber R2 External space

Claims (3)

In a door unlocking device comprising a strike provided on any one of opposing surfaces of a pair of doors joined to each other, and a latch provided on the other and capable of advancing and retreating to the strike,
A door unlocking device comprising a rotating member that contacts the latch that has advanced into the strike and is rotatable in the advancing and retracting direction of the latch.   2. The door unlocking device according to claim 1, wherein the rotating member is provided on a wall surface side of the strike facing a direction opposite to a door opening direction of the door. The door unlocking device according to claim 1, wherein the rotating member is a roller that is rotatable about an axis along a height direction of the door.

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