JP2013167127A - Fire protection device for door - Google Patents

Abstract

A fire prevention device for a door having a simple structure and high sensitivity to heat is provided at low cost.
An operating device provided with a low-melting sensor pin that normally fits an outer tube and an inner tube that is pivotably fitted to the inner tube and restricts the rotation of the inner tube. A lock 3 having a biased lock rod 7 and a hub 8 interlocked with the rotation of the lock rod 7 is provided, and the engagement portion 53 of the inner cylinder 5 is engaged with the engagement hole 83 of the hub 8. In combination, the actuating device 2 and the lock 3 are connected to each other, so that the lock pin 7 is always kept in the unlocked state, and in the event of a fire, the sensor pin 4 of the actuating device 2 is melted or thermally deformed. By allowing the inner cylinder 5 to rotate, the lock rod 7 automatically protrudes and is locked.
[Selection] Figure 5

Description

  The present invention relates to a door fire prevention device.

  When a fire breaks out in a condominium or a detached house, the entrance door expands and deforms due to heat, and flames and smoke may diffuse to the outside and spread to adjacent houses. In particular, in the case of a metal door such as a sash that has been frequently used in recent years, there is a strong possibility of fire spreading due to large deformation. In order to prevent such a situation, a fire prevention device as shown in Patent Document 1 may be attached to an entrance door or the like.

  In the case of the device described in Patent Document 1, when a flame is generated and the temperature rises, the sensor pin of the (indoor side) seat is melted and the engagement between the connecting rod and the seat is released. Thereby, the lock rod protrudes and is locked to the receiving member on the frame side, thereby preventing the door from being deformed and preventing fire spread.

JP-A-8-232520

  However, in the case of the apparatus described in Patent Document 1, the structure of the seat on which the sensor pin is provided is complicated and is composed of dedicated parts, and the apparatus is expensive.

  The present invention has been made in view of the above circumstances, and its main purpose is a simple configuration, and an off-the-shelf member can be used, and a fire prevention device for a door that is highly sensitive to heat is provided at a very low cost. There is to do.

The present invention has been made to solve the above problems, and the door fire prevention device according to claim 1 is configured to rotatably hold the inner cylinder in the outer cylinder, An actuating device provided with a sensor pin made of a low-melting material that crosses the rotation boundary with the outer cylinder and regulates the rotation of the inner cylinder;
A lock that is pivotally supported in a case attached in the door and is always urged in a protruding direction, and a lock having a hub that is interlocked with the rotation of the lock,
By unlocking the lock lever through the hub at all times by engaging the engaging portion of the inner cylinder of the operating device from the indoor side of the door and connecting the operating device and the lock to the hub of the lock. In the event of a fire, the sensor pin of the actuator is melted or thermally deformed, allowing the inner cylinder to rotate, allowing the lock hub to rotate and the lock rod to protrude and lock. It is made to be made to be done.

According to the fire prevention device for a door of the present invention, a door fire prevention device that is compact with a simple structure, can use an off-the-shelf member, and has high sensitivity to heat can be provided at a very low cost.
Moreover, since it is compact and has a good appearance, even if it is used by being attached to one or two places at the upper end or the lower end of the door, the appearance of the entire door is not impaired.

It is the front view of the door seen from the room inner side which shows the use condition of the fire prevention apparatus for doors of this invention. It is a principal part enlarged front view of FIG. It is a principal part enlarged side view of FIG. It is a principal part enlarged rear view of FIG. 1 (front view seen from the outdoor side). It is a disassembled perspective view of the fire prevention apparatus for doors of this invention. It is AA sectional drawing of FIG. It is a principal part enlarged view of the actuator of FIG. 6 (however, the state before screw 21 insertion). It is BB sectional drawing of FIG. It is a front view which shows the inside of the lock | rock of the state (unlocked state) which the lock came back. It is sectional drawing which shows the state which the operating device act | operated from the state of FIG. It is CC sectional drawing of FIG. It is a front view which shows the inside of the lock | rock of the state (locking state) in which the lock rod protruded. It shows a state (unlocked holding state) in which the lock basket is held back.

  Embodiments of the door fire protection device of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a front view of a door viewed from the indoor side, showing a use state of the door fire prevention device 1 of the present invention, and the door fire prevention device 1 is attached to the upper part of the open end side of the door D. In the figure, L is a main lock, DC is a door closer, and J is a frame.

  2 to 4 are enlarged views of the main part of FIG. 1, FIG. 5 is an exploded perspective view of the door fire protection device 1 of the present invention, FIG. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 8 is a cross-sectional view taken along the line BB of FIG. 7, and FIG. 9 is a front view showing the inside of the lock 3 in an unlocked state in which the lock rod 7 is retracted.

The fire protection device 1 for a door according to the present invention includes a lock 3 having a lock 7 and an operation device 2 that is automatically activated in the event of a fire to project the lock 7 of the lock 3.
The actuating device 2 is attached to the indoor side of the door D, and has an inner cylinder 5 connected to the lock 3, an outer cylinder 6 in which the inner cylinder 5 is rotatably fitted, and the inner cylinder 5. And a sensor pin 4 that regulates the rotation.

As shown in Patent Document 1, the lock 3 is a conventionally known one and is attached to the inside of the door D.
An emergency unlocking device 20 is attached to the outdoor side of the door D, and the unlocking operation can be performed by retracting the lock bar 7 of the locked lock 3 from the outdoor side as needed.

  As shown in FIGS. 5 to 8, the operating device 2 includes an inner cylinder 5 having a large-diameter collar 52 and a small-diameter shaft 51, and the inner cylinder 5 is rotatably fitted. An outer cylinder 6 and a sensor pin 4 are provided.

  The outer cylinder 6 has a small-diameter hole 61 penetrating in the axial direction and a large-diameter hole 62 connected to the small-diameter hole 61, and the small-diameter hole 61 and the large-diameter hole 62 are connected to the shaft of the inner cylinder 5. The part 51 and the collar part 52 are fitted and held rotatably. As a holding method, a retainer 57 is fitted into a groove 56 provided in the shaft portion 51 of the inner cylinder 5, and the inner cylinder 5 is detached from the outer cylinder 6 by the retainer 57 coming into contact with a stepped portion 63 of the outer cylinder 6. Not to be held.

  The inner cylinder 5 and the outer cylinder 6 of the operating device 2 are made of the same members as the inner cylinder and the outer cylinder constituting a ready-made cylinder used for a general simple lock, and a hole for a tumbler pin of the cylinder, A member in a semi-finished product state before processing a key insertion groove or the like can be used as it is, and only the holes 55 and 65 for fitting the sensor pin 4 and the operation groove 54 need be added.

  The sensor pin 4 is made of a low melting point alloy such as a fuse or a low-melting material such as a resin, and straddles the rotation boundary S between the inner cylinder 5 and the outer cylinder 6 as shown in FIGS. Thus, the holes 55 and 65 formed in the inner cylinder 5 and the outer cylinder 6 are fitted. One end of the sensor pin 4 held in this way is provided to be exposed to the indoor side so as to be in contact with the outside air.

  By the way, the lock rod 7 of the lock 3 attached to the door D before the actuating device 2 is attached is not restricted in its urging force in the protruding direction, so that it is held in the protruding state of FIG. Is also maintained in the state of FIG.

  The inner cylinder 5 of the actuating device 2 is rotatable with respect to the outer cylinder 6 when the sensor pin 4 is not fitted, so that a coin, a tool or the like is interposed through the operation groove 54 of the inner cylinder 5. The inner cylinder 5 is rotated, the engaging portion 53 is rotated until it can be engaged with the engaging hole 83 of the hub 8 of the lock 3, and the engaging portion 53 is engaged with the engaging hole 83, The actuator 2 is attached.

  Next, the inner cylinder 5 is rotated through the operation groove 54 of the inner cylinder 5 to the state shown in FIG. Retreat. In this unlocked state, the sensor pin mounting hole 55 of the inner cylinder 5 and the sensor pin mounting hole 65 of the outer cylinder 6 coincide with each other as shown in FIG. Disguise. When the rotation force of the inner cylinder 5 is released after the sensor pin 4 is fitted, a force in the rotation direction is applied to the inner cylinder 5 through the hub 8 due to the biasing of the lock rod in the protruding direction. Since the sensor pin 4 is held in a state of being crimped to the hole 65 of the outer cylinder 6 by the hole 55 of the inner cylinder 5, it is not detached due to vibrations when the door is opened and closed.

  In addition, as a method for attaching the lock 3 and the actuator 2 and a method for fitting the sensor pin 4, the hub 8 of the lock 3 is rotated to the unlocked holding state shown in FIG. After attaching the lock 3 held in the unlocked state and attaching the engaging portion 53 of the inner cylinder 5 of the actuating device 2 according to the angle, the inner cylinder 5 is rotated to the unlocked state of FIG. The sensor pin 4 may be fitted in the same manner as described above.

  An operation groove 54 that can be rotated by a coin or a screwdriver is formed at the front end of the inner cylinder 5 of the actuator 2, and the rear end is engaged with the engagement hole 83 of the hub 8 of the lock 3. An engaging portion 53 that is engaged and connected to the lock 3 is formed.

  As shown in FIGS. 3, 5, and 6, the actuating device 2 is inserted from an indoor side through a mounting hole (not shown) formed in the door D, and its rear end is attached to the inside of the door D. The lock 3 is brought into contact with the case 31. Next, from the outdoor side, the screw mounting hole of the outer cylinder 6 of the operating device 2 from the indoor side is inserted into the screw hole 66 of the outer cylinder 60 of the emergency unlocking device 20 inserted into the door D in the same manner as described above. The screw 21 inserted from 64 is screwed in and attached. At this time, it is preferable to provide the spacer 22 between the case 31 and the cover 32 as shown in FIG. 6 so that the case 31 and the cover 32 of the lock 3 are not distorted by tightening the screws 21.

  The emergency unlocking device 20 attached to the outdoor side of the door D is for unlocking the lock 3 on which the lock rod 7 protrudes and is locked as necessary, and is similar to the operation device 2 described above. It has the composition of. That is, the emergency unlocking device 20 also includes an inner cylinder 50 and an outer cylinder 60 that are the same as those of the operating device 2. The inner cylinder 50 has a small-diameter shaft portion 51 and a large-diameter collar portion 52, and a coin or the like at the tip portion. An operation groove 54 that can be operated in the above manner is formed, and an engagement portion 53 that engages with the engagement hole 83 of the hub 8 of the lock 3 is formed at the rear end portion. The outer cylinder 60 has a small-diameter hole 61 and a large-diameter hole 62, and the inner cylinder 50 is fitted into the outer cylinder 60 and held rotatably. As a holding method, a retainer 57 is fitted into a groove 56 provided in the inner cylinder 50 so that the inner cylinder 50 is not detached from the outer cylinder 60.

  The difference in configuration between the actuating device 2 and the emergency unlocking device 20 is that holes 55 and 65 for fitting the sensor pin 4 are formed in the inner cylinder 5 and the outer cylinder 6 of the actuating device 2, and the sensor pin 4 is fitted. On the other hand, the emergency unlocking device 20 is not provided with the sensor pin 4 and the outer cylinder 6 of the operating device 2 is formed with a screw mounting hole 64 for inserting the screw 21. On the other hand, the screw hole 66 is only formed in the outer cylinder 60 of the emergency unlocking device 20.

In the emergency unlocking device 20, unlike the operation device 2, since the sensor pin 4 is not fitted, the inner cylinder 50 is always rotatable with respect to the outer cylinder 60.
An engagement portion 53 is also formed at the rear end portion of the inner cylinder 50 and is engaged with the engagement hole 83 of the hub 8 of the lock 3 to be connected to the lock 3. The inner cylinder 50 rotates in conjunction with the rotation of the interlocking hub 8.

By the way, in the unlocked state of the lock 3 in FIG. 9, the engaging portion 53 of the inner cylinder 5 of the operating device 2 is engaged with the engaging hole 83 of the hub 8 from the indoor side, and the inner cylinder 5 is rotated. Since it is regulated by the sensor pin 4, the rotation of the hub 8 is regulated, and the lock rod 7 interlocked with the hub 8 is also regulated against the urging force, and the unlocked state is maintained. Even if the operation groove 54 of the inner cylinder 50 of the emergency unlocking device 20 is rotated by a coin or the like from the outdoor side in this unlocked state, the rotation of the hub 8 is restricted. It cannot be locked out.
As will be described later, when the sensor pin 4 is melted or deformed in the event of a fire, the restriction on the rotation of the inner cylinder 5 is released and the lock 3 is automatically locked, and then the unlocking operation is performed, or the installation work The emergency unlocking device 20 is used in the event that it is locked by mistaken operation.

In addition, the seat 9 for concealing the attachment hole (not shown) processed into the door D is attached to the actuator 2 and the emergency unlocking device 20.
As shown in FIG. 5, the seat 9 is formed of a thin plate-like body, has a rectangular outer shape, and a sleeve portion 91 is integrally formed at the center by stamping. The inner diameter of the sleeve 91 is substantially the same as that of the outer cylinder 6 (60), and protrusions 92 are formed on the left and right sides.

  The seat 9 is attached by fitting the sleeve portion 91 to the outer cylinders 6 and 60 of the operating device 2 and the emergency unlocking device 20 from the inside of the door D and the outdoor side. At this time, since the projection 92 formed on the sleeve 91 abuts against the outer cylinders 6 and 60, it cannot be fitted with a small force, but if pushed in strongly, the sleeve 91 expands due to the elasticity of the sleeve 91 itself, The protrusion 92 is fitted while crimping the outer periphery of the outer cylinders 6 and 60, and is attached as shown in FIG. Thus, since the sleeve portion 91 of the seat 9 is held by being crimped to the outer cylinders 6 and 60 via the projections 92, the seat 9 does not come off without being screwed.

  FIG. 9 shows a conventionally known lock 3 shown in Patent Document 1 and shows an internal configuration with the cover 32 removed. The lock rod 7 formed of a plate-like body is rotated around the case 31 by the shaft 71. It is pivotally supported. A kick spring 75 is hung on the shaft portion 71 of the lock rod 7, one end is brought into contact with the lower end portion of the case 31, and the other end is brought into contact with a locking pin 74 fixed to the lock rod 7. The rod 7 is always projected and biased in the locking direction.

  As shown in FIG. 6, a shaft portion 81 of the hub 8 is pivotally supported by the case 31 and the cover 32 of the lock 3 at the rear portion of the case 31, and the engagement hole 83 is operated from the indoor side. The engaging portion 53 of the inner cylinder 5 of the device 2 is engaged with the engaging portion 53 of the inner tube 50 of the emergency unlocking device 20 from the outdoor side so that the operating device 2 and the emergency unlocking device 20 are connected to the lock 3. Has been.

An operating pin 82 is fixed to the tip of the hub 8, and the operating pin 82 engages with an engaging groove 72 formed in the lock rod 7, and the hub 8 and the lock rod 7 are interlocked. It is provided to rotate.
The engagement groove 72 is formed in a horizontally long slot shape with one end opened, and an unlocking holding engagement step 73 described later is formed at the lower end of the opening.

  Normally, the rotation of the inner cylinder 5 of the actuating device 2 is restricted by the sensor pin 4, and the hub 8 is restricted from rotating by the engaging portion 53 of the inner cylinder 5 that engages with the engagement hole 83. Yes. Accordingly, the lock rod 7 in which the engagement groove 72 engages with the operation pin 82 fixed to the hub 8 is also restricted from rotating, the protrusion by the urging force of the kick spring 75 is restricted, and the unlocked state of FIG. 9 is maintained. Is done.

  In addition, in the figure, 33 is a mounting plate formed integrally with the case 31 of the lock 3, and 36 is a front plate. A screw 39 is inserted into the mounting holes 34 and 37 formed in each, and screwed into the door. Attach lock 3 to D. Reference numerals 35 and 38 denote openings for protruding the lock 3 formed in the mounting plate 33 and the front plate 36.

  Next, in the event of a fire, the low-melting sensor pin 4 of the operating device 2 provided on the indoor side due to heat is exposed to the indoor side, so the sensitivity of heat is high and the temperature exceeds a certain level. It will melt or deform. When the sensor pin 4 is melted or deformed, the restriction of the rotation of the inner cylinder 5 is released, so that the hub 8 whose rotation is restricted by the engaging portion 53 of the inner cylinder 5 can be rotated. As shown in FIG. 2, the lock rod 7 interlocked with the hub 8 is rotated and protruded by the urging force of the kick spring 75, and the lock rod 7 is engaged with a receiving hole (not shown) provided in the frame J so as to be locked. Become. At this time, the protrusion 76 formed on the upper end portion of the lock rod 7 comes into contact with the peripheral edge portion of the opening portion 35 of the mounting plate 33, and further protrusion of the lock rod 7 is prevented.

  In the above-described locked state, the state of the inner cylinder 5 and the outer cylinder 6 of the operating device 2 is that the sensor pin 4 fitted in the holes 55 and 65 of the inner cylinder 5 and the outer cylinder 6 is melted or deformed. 5 is released, the engaging portion 53 that engages with the hub 8 is rotated, and the inner cylinder 5 is rotated counterclockwise as shown in FIGS.

  When the lock rod 7 protrudes and engages with a receiving hole (not shown) of the frame J and is locked, the door D tends to expand and deform due to the heat of the fire. Since the lock by the main lock L attached to the center part and the upper part of the door D are locked by the lock rod 7 of the door fire prevention device 1 of the present invention, the deformation of the door D is prevented, and the door D and the frame J There is no gap between them. Therefore, diffusion of flames and smoke to the outside can be prevented, and the spread of fire to adjacent buildings can be prevented.

FIG. 13 shows an unlocked holding state in which the lock rod 7 is retracted and held in an unlocked state. The lock that has been locked due to a malfunction in the event of a fire or construction is shown in FIG. 9 is operated by rotating the inner cylinder 50 of the emergency unlocking device 20 with a coin or the like from the outdoor side, and the hub 8 of the lock 3 is rotated to retract the lock lever 7 as shown in FIG. Locked. Further, when the hub 8 is rotated to the state shown in FIG. 13 by rotating the inner cylinder 50 in the rotation operation direction, the operation pin 82 of the hub 8 is located at the lower end of the opening of the engagement groove 72 of the lock rod 7. In this state, even if the turning operation force of the hub 8 by the inner cylinder 50 is released, the lock rod 7 does not turn in the protruding direction by the biasing force. It is held in a locked state.
(Variations, etc.)

  In the above embodiment, the case where the door fire protection device 1 is attached to one place at the upper end of the door has been shown, but in the case of a large door or the like, by attaching it to the lower portion of the door, In addition to locking with the main lock L, the upper and lower two places are locked in total, so that deformation of the door can be prevented more effectively.

  In addition, when the door fire protection device 1 of the present invention is used at one location, the mounting location is not limited to the upper end portion of the door, and 1 at the lower end portion depending on the position of the main lock L and the size of the door D. It can also be used by attaching it to a location.

  In addition, the emergency unlocking device 20 attached to the outdoor side is not essential and can be omitted.

DESCRIPTION OF SYMBOLS 1 Door fire prevention apparatus 2 Actuator 3 Lock 4 Sensor pin 5 Inner cylinder 6 Outer cylinder 7 Lock rod 8 Hub 9 Seat 20 Emergency unlocking apparatus 50 Inner cylinder 53 Engagement part 60 Outer cylinder 83 Engagement hole D Door J Frame L Main lock

Claims (1)

Actuation with a sensor pin made of a low-melting material that holds the inner cylinder in the outer cylinder so that it can rotate freely and straddles the rotation boundary between the inner cylinder and the outer cylinder and restricts the rotation of the inner cylinder Equipment,
A lock that is pivotally supported in a case attached in the door and is always urged in a protruding direction, and a lock having a hub that is interlocked with the rotation of the lock,
By unlocking the lock lever through the hub at all times by engaging the engaging portion of the inner cylinder of the operating device from the indoor side of the door and connecting the operating device and the lock to the hub of the lock. In the event of a fire, the sensor pin of the actuator is melted or thermally deformed, allowing the inner cylinder to rotate, allowing the lock hub to rotate and the lock rod to protrude and lock. A fire prevention device for doors, characterized by being made to be.

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