JP6329768B2 - Joinery - Google Patents

Description

  The present invention relates to a joinery, and more particularly to a joinery having a high fire resistance.

  In the joinery that opens and closes by swinging the door body around the hanging side where the hinge is provided, a locking device such as a latch lock is provided in the center of the door in the height direction. Engage and disengage from the frame. However, such joinery may be warped by the heat when a fire breaks out. This warpage is likely to occur on the upper and lower sides of the door end which is not fixed to the frame, and there is a possibility that a gap is generated between the frame and the door body, so that smoke or flame is diffused and damage is increased.

On the other hand, techniques such as Patent Documents 1 and 2 are disclosed.
In the fire door lock described in Patent Literature 1, when a fire occurs, the lock pin pops out and engages the frame before the sensor pin is melted or thermally deformed and the door is largely deformed. Thereby, since no gap is generated between the frame and the joinery, it is possible to prevent diffusion of smoke and flame.
On the other hand, in the door lock described in Patent Document 2, latch locks are attached to both the upper and lower sides on the door end side, and are interlocked to function as a latch lock from the normal time. Therefore, even when a fire occurs, the latch locks are provided on both the upper and lower sides of the door, so that the latch locks prevent warping due to heat.

JP-A-8-232520 JP2013-19228A

  However, joinery as described in Patent Documents 1 and 2 is intended to enhance fire resistance, and is manufactured as a dedicated part for that purpose. Therefore, versatility is low and expensive. On the other hand, since the means for preventing such warpage is not effective after the joinery warps, the function of smoothly operating automatically in the event of a fire must be maintained.

  Therefore, in view of such problems, an object of the present invention is to provide a joinery that operates more smoothly in the event of a fire while adopting a more general-purpose structure.

  The present invention will be described below.

The invention according to claim 1 is a frame, a door disposed in a frame of the frame, and an outdoor decorative plate and an indoor decorative plate arranged at a predetermined interval, and the outdoor decorative plate and the indoor side. A latch lock disposed on at least one of the door side upper part and the door side lower part among the decorative plate, and the latch lock is provided on the case so as to project into and out of the case and swing. latch held, switches between the locked state where the swing is restricted at a position where the latch is projected with respect to the case, the unlocking state is maintained protruding and retracting freely and swingably with respect to the latch case, the mechanism And an unlocking member that is disposed between the outdoor decorative plate and the indoor decorative plate and whose mechanism is locked by heat, and has a means for deforming or melting the unlocking member. .

  The invention according to claim 2 is that, in the joinery according to claim 1, the means for deforming or melting the unlocking member is arranged in contact with the indoor decorative board side.

  According to a third aspect of the present invention, in the fitting according to the first or second aspect, the means for deforming or melting the unlocking member is such that the unlocking member is in contact with the indoor decorative plate via the heat transfer member. It is that you are.

  According to a fourth aspect of the present invention, in the fitting according to any one of the first to third aspects, the means for deforming or melting the unlocking member is located at a portion of the indoor decorative plate where the unlocking member is disposed. A hole is provided, and the hole is filled with a resin that melts by heat.

  According to the joinery of the present invention, a latch lock is used and a general-purpose structure is adopted, but the latch is automatically and smoothly locked in the event of a fire by means of deformation or melting of the unlocking member and the unlocking member. The warping of the door can be prevented.

It is a figure explaining one form, and is a front view of joinery. FIG. 3 is an exploded perspective view of the door body 20. FIG. 3 is a front view illustrating the internal structure of the door body 20. 4A is a perspective view of the fire prevention latch lock 40, and FIG. 4B is an exploded perspective view of the fire prevention latch lock 40. FIG. 5A is a cross-sectional view of the fire prevention latch lock 40, and FIG. 5B is a cross-sectional view taken along the line Vb-Vb in FIG. 5A. 6A is a cross-sectional view of the fireproof latch lock 40 in the locked state, and FIG. 6B is a cross-sectional view taken along the line VIb-VIb in FIG. 6A. It is a figure explaining the means to make the deformation | transformation or melting of one unlocking member. It is a figure explaining the means to make a deformation | transformation or melting of another unlocking member. FIG. 9A is a perspective view illustrating a means for deforming or melting still another unlocking member, and FIG. 9B is a cross-sectional view illustrating a means for deforming or melting still another unlocking member. It is a figure explaining the unlocking member 155. FIG.

  The above-described operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to the embodiment.

FIG. 1 is a front view of a joinery 1 according to one embodiment.
As can be seen from FIG. 1, the joinery 1 has a frame body 10 and a door body 20, and the suspension side of the door body 20 (the right side in FIG. 1) is the same as the suspension side vertical frame 14 of the frame body 10. No. 2 is connected so as to be swingable.

  The frame 10 includes an upper horizontal frame 11, a lower horizontal frame 12, a door-end side vertical frame 13, and a suspension base side vertical frame 14 that are framed in a rectangular shape. Its basic structure is the same as a known frame. However, in the frame 10, in addition to the dead bolt 34 of the locking device 30, the hole 13a and the hole 13b into which the latch 33 is inserted, the hole 13c into which the latch 45 of the fire prevention latch lock 40 is inserted into the door end side vertical frame 13. (See also FIG. 7).

The door body 20 is disposed within the frame of the frame body 10, and its hanging end side end is connected to the hanging side vertical frame 14 with a hinge 2 and swings around the hinge 2 to open and close. FIG. 2 is an exploded perspective view of the door body 20, and FIG. 3 is a front view illustrating the internal structure of the door body 20.
As can be seen from FIGS. 1 to 3, the door 20 includes an outdoor decorative plate 21, core members 22, 23, 24, 25, a locking device 30, a fireproof latch lock 40, a core material 70, and an indoor decorative plate 71. It has. In addition, members such as the handle 72 shown in FIG. 1 are provided.

  The outdoor decorative plate 21 and the indoor decorative plate 71 are subjected to end processing in which ends of four sides of a metal plate such as steel or aluminum are bent into an L shape, and upper end bent portions 21a and 71a, It has lower end bent parts 21b and 71b, left end bent parts 21c and 71c, and right end bent parts 21d and 71d. In this way, a shallow box is formed by raising the four sides of the plate material so as to be orthogonal to the plane portions 21e and 71e. As will be described later, each member is disposed between the outdoor decorative plate 21 and the indoor decorative plate 71. Further, the portions of the left end bent portions 21c and 71c where the locking device 30 and the fire prevention latch lock 40 are provided are cut so that the latches 33 and 45 and the dead bolt 34 of the locking device 30 and the fire prevention latch lock 40 can protrude and retract. The flat portions 21e and 71e are provided with holes 21f and 71f in portions where the operating portions such as the thumb turn and cylinder lock of the locking device 30 are arranged.

  The core members 22, 23, 24, and 25 are rod-shaped members having a U-shaped cross section and are disposed along the end portions of the four sides of the door body 20. At this time, the opening in the U-shaped cross section is set to the posture toward the inside of the steel plate door 30. The core member 24 to which the locking device 30 and the fire prevention latch lock 40 are attached is provided with holes 24a and 24b so that the latches 33 and 45 and the dead bolt 34 of the locking device 30 and the fire prevention latch lock 40 can protrude and retract. It is done.

The locking device 30 includes a box 31 containing a locking mechanism, and a pair of operation units 32 arranged so as to protrude from the box in the indoor and outdoor directions (only one is shown in FIG. 2 because of a blind spot). It comprises. The operation unit 32 is provided with a cylinder lock on the outdoor operation unit 32 and a thumb turn on the indoor operation unit 32. Since the operation unit 32 is disposed so as to be exposed to the outside of the room, the user can operate the operation unit 32, and the dead bolt 34 (see FIGS. 1 and 2) is protruded from the locking device 30 to the door. Locking / unlocking is possible by entering and retracting into the hole 13a (see FIG. 1) of the front vertical frame 13.
The locking device 30 includes a mechanism for operating a latch 33 (see FIGS. 1 and 2) inside the box body 31. This mechanism is interlocked with the handle 72 as known, and the latch 33 that has entered the hole 13b (see FIG. 1) of the door-end side vertical frame 13 by the operation of the handle can be locked and unlocked.

  The fire prevention latch lock 40 is a latch lock that is unlocked during normal times and is locked when the door body 20 is heated by a fire or the like, and is disposed on at least one of an upper part and a lower part of the door. FIG. 4A is a perspective view of the fire prevention latch lock 40, and FIG. 4B is an exploded perspective view of the fire prevention latch lock 40 with the unlocking member 55 detached. 5A is a cross-sectional view of the fire lock 40 along the line indicated by Va-Va in FIG. 4A, and FIG. 5B is a line indicated by Vb-Vb in FIG. 5A. It is sectional drawing of the latch lock 40 for fire protection which followed.

  The fire prevention latch lock 40 has a case 41, and many of the members constituting the fire prevention latch lock 40 are included inside the case 41. A front plate 42 is fixed to the case 41 so as to follow the end face of the door. A portion of the front plate 42 that protrudes larger than the case 41 is fixed to the core member 24. The front plate 42 is formed with an opening hole 43 into which the latch 45 projects and sinks.

A latch frame 44 having a U-shape in a cross section in FIG. 5A is fixed to an end of the case 41 on the side where the latch 45 protrudes and retracts. A latch 45 is disposed on the inside of the latch frame 44 which is U-shaped. The form of the latch 45 is as known. That is, an inclined surface 45b and a projecting and retracting direction parallel surface 45c are formed at the end of the latch 45 on the side protruding from the case 41.
The latch 45 is held inside the latch frame 44 so as to project and retract (in the direction of arrow A in FIG. 5B) and swing (in the direction of arrow B in FIG. 5B) with respect to the case 41. It is urged by a latch spring 47 through the pressing member 46 in a direction protruding from the case 41. The pressing member 46 is engaged with a guide groove 48 provided in the latch frame 44, and smoothly guides the protrusion and depression of the latch 45.
Further, the latch 45 is formed with a separation preventing protrusion 45a to prevent the latch 45 from coming out.

  In addition to this, the latch 45 is formed with a guide surface 49 along the protruding and retracting direction. The guide surface 49 is in contact with the regulating member 50 described below so as to slide. With the guide surface 49 in contact with the restricting member 50, the latch 45 is restricted from swinging and can only move in the protruding and retracting direction.

  The restricting member 50 is held inside the case 41 so as to be able to swing around the swing shaft 51, and one end portion 50 a thereof is in contact with the guide surface 49 by a restricting spring 52 (in this embodiment, a torsion spring). Biased in the direction. As will be described later, in a posture in which one end portion 50a of the regulating member 50 is in contact with the guide surface 49, the swing is regulated by allowing the latch 45 to move in the direction in which the latch 45 projects and sinks. In this way, the regulating member 50 can take an attitude in which the latch 45 is regulated and an attitude in which the latch 45 is not regulated. And the change of the said attitude | position is performed by the interlocking member 53 and the unlocking member 55 which are demonstrated below.

  The interlocking member 53 is held inside the case 41 so as to be able to swing around an interlocking member swinging shaft 54 provided so as to be parallel to the swinging shaft 51. One end portion 53a of the interlocking member 53 is in contact with the other end portion 50b of the regulating member 50 with the interlocking member swinging shaft 54 interposed therebetween. The posture of the interlocking member 53 is determined by the regulating member 50 and the unlocking member 55 described below. This posture will be described later.

The unlocking member 55 is a member for maintaining the latch 45 so that it can protrude and retract with respect to the case 41 (that is, the latch lock is maintained in the unlocked state). In this embodiment, the shape of the unlocking member 55 appears well in FIG. The unlocking member 55 is provided with a locking projection 57 and a regulating piece 58 at one end of a U-shaped main body 56 that is open on the lower side. On the other hand, as shown in FIG. 4B, the case 41 is provided with a locking projection insertion hole 41a in one side plate, and a restricting piece insertion hole 41b (FIG. 5B) in the side plate opposite to the side plate. a)) is provided. Then, the upper end portion is inserted inside the main body 56 so that the U-shaped main body 56 covers the upper end portion of the case 41, the locking protrusion insertion hole 41a has the locking protrusion 57, and the restriction piece insertion hole 41b has the restriction piece. Insert 58 and combine.
The unlocking member 55 is configured to be unable to hold the interlocking member 53 by being melted or deformed by heat at the time of a fire. At this time, as a means for deforming or melting the unlocking member for smoother melting or deformation (sometimes referred to as “accelerating means” for the sake of convenience; the same applies hereinafter), the unlocking member 55 is greatly deformed at room temperature. And it can comprise with the material which fuse | melts or deform | transforms largely at 300 degrees C or less, without fuse | melting. Examples of the material include foamed EPS.

  The disaster prevention latch lock 40 as described above can take at least two postures described below.

  The first posture is the posture shown in FIGS. 5 (a) and 5 (b). In this posture, the unlocking member 55 is attached without being melted and deformed by heat. That is, in this posture, the upper end portion is inserted inside the main body 56 so that the U-shaped main body 56 of the unlocking member 55 covers the upper end portion of the case 41, and the locking protrusion is inserted into the locking protrusion insertion hole 41a. 57, the restriction piece 58 is inserted into the restriction piece insertion hole 41b (see FIG. 4A for the external appearance). At this time, the restricting piece 58 presses the end portion 53 b on the side close to the restricting piece 58 in the interlocking member 53 in the direction separating from the latch 45. Then, the interlocking member 53 rotates around the interlocking member swinging shaft 54, and the end portion 53 a opposite to the end portion 53 b rotates in a direction approaching the latch 45. The end portion 53a thus rotated presses the end portion 50b of the regulating member 50 that is separated from the latch 45. Then, the restricting member 50 rotates around the swing shaft 51 against the urging force of the restricting spring 52, and the end portion 50 a opposite to the end portion 50 b rotates in a direction away from the latch 45. . Thus, the end portion 50a separated from the latch 45 is retracted to a position that does not restrict the swing and protrusion of the latch 45. Therefore, in the first posture, the latch 45 can freely move and rotate as shown by arrows A and B in FIG. 5B, and maintains the unlocked state of the latch lock.

On the other hand, in the second posture, the swing of the latch 45 is restricted. FIGS. 6A and 6B are diagrams for explanation. 6A is a view from the same viewpoint as FIG. 5A, and FIG. 6B is a cross-sectional view taken along the line VIb-VIb in FIG. 6A.
In this posture, the unlocking member 55 is melted or deformed by heat (FIGS. 6A and 6B show a melted state). That is, in this posture, a force that presses the end portion 53 b on the side close to the regulating piece 58 in the interlocking member 53 in the direction separating from the latch 45 is not acting. Then, the interlocking member 53 cannot restrict the rotation of the restricting member 50, and the biasing force of the restricting spring 52 of the restricting member 50 causes the end portion 50 a on the latch 45 side of the restricting member 50 to approach the latch 45. Rotate. Accordingly, the end 50b opposite to the end 50a presses the end 53a of the interlocking member 53 to rotate the interlocking member 53. Thus, according to the end portion 50a of the regulating member 50 approaching the latch 45, the swing of the latch 45 is regulated, and the protrusion and depression are not regulated. Therefore, in the second posture, the latch 45 can only move in the protrusion and depression indicated by the arrow A in FIG. 6B, and the latch lock is locked.

  The mechanism of the fire prevention latch lock 40 has been described above. However, in the fire prevention latch lock 40, an existing known latch lock mechanism can be applied except for the unlocking member 55. Therefore, the unlocking member 55 is produced, and a known latch lock may be used for the other parts. Thereby, since there may be very few exclusive members as a fire prevention latch lock, the fitting which was excellent in fire prevention property can be provided cheaply.

Returning to FIGS. 1 to 3, another structure of the joinery 1 will be described.
The core material 70 is arrange | positioned so that the inside of the door 20 may be satisfy | filled with a plate-shaped member. Therefore, it is cut or deformed according to other members provided inside the door body 20. As the core material 70, a plate material of a known material mainly having heat insulating properties and fireproof properties is applied.

Each element of the joinery 1 having the above configuration is assembled as follows, for example.
Regarding the door body 20, first, the locking device 30 is inserted and fixed to the core member 24 in accordance with the hole 24 a of the core member 24. Further, a fire prevention latch lock 40 is inserted in accordance with the hole 24 b of the core member 24, and is fixed to the core member 24 by the front plate 42. In the present embodiment, the fixing position has a feature from the viewpoint of a means (promoting means) for deforming or melting the unlocking member. The feature will be described later.

  Next, the core member 22 is disposed along the bent portion 21 a of the outdoor decorative plate 21. Similarly, the core member 23 is bent along the bent portion 21b of the outdoor decorative plate 21, the core member 24 is bent along the bent portion 21c of the outdoor decorative plate 21, and the core member 25 is bent along the bent portion 21d of the outdoor decorative plate 21. Arrange along each. Thereby, a frame shape is formed by the core members 22, 23, 24, and 25 along the edge of the outdoor decorative plate 21. Then, the core material 65 is disposed on the inner side surrounded by the core materials 22, 23, 24 and 25. And it mounts so that the indoor side decoration board 71 may be covered from the indoor side of each said assembled member. At this time, the operation unit 32 of the locking device 30 is disposed so as to be exposed to the indoor side through the through hole 71 f of the indoor steel plate 71. Further, during the assembly, the core material 70 and the outdoor inner decorative plate 21, and the core material 70 and the indoor side steel plate 71 are bonded together with an adhesive. The upper end bent end portions 21a, 71a, the lower end bent end portions 21b, 71b, the left end bent end portions 21c, 71c, and the right end bent end portions 21c, 71c are core materials 22, 23, 24, 25 from the outside by rivets or the like. Connected to Specifically, the upper bent end portions 21a and 71a are on the core member 22, the lower bent end portions 21b and 71b are on the core member 23, the left bent end portions 21c and 71c are on the core member 24, and the right bent end portions 21d and 71d are The core member 25 is connected to each other. Thereby, the outdoor decorative plate 21 and the indoor decorative plate 71 are connected via the core member 70 and the core members 22, 23, 24, and 25.

Here, the door body 20 includes a means (promotion means) that smoothly melts or deforms the unlocking member 55 of the fireproof latch lock 40 when the door body 20 is heated from the indoor side due to a fire or the like. Has been. FIG. 7 shows a diagram for explaining the promoting means in the present embodiment. FIG. 7 is a view focusing on the end portion on the fire prevention latch lock 40 side in the sectional view taken along the line VII-VII in FIG. In FIG. 7, the center line of the gap between the outdoor decorative plate 21 and the indoor decorative plate 71 is represented by a dotted line, and the center line of the size (thickness) of the fire prevention latch lock 40 in the indoor / outdoor direction is represented by a dashed line. Yes.
As can be seen from FIG. 7, in this embodiment, the center line of the size (thickness) of the fire prevention latch lock 40 in the indoor / outdoor direction is the gap between the outdoor decorative plate 21 and the indoor decorative plate 71. It is brought closer to the indoor decorative board 71 side than the center line. Thereby, when the door 20 is heated by a fire or the like that has occurred indoors, the unlocking member 55 of the fireproof latch lock 40 is brought close to the heating side, so that the unlocking member 55 is smoothly deformed or melted. It becomes possible.
Here, in the said acceleration | stimulation means, the unlocking member 55 may be in contact with the indoor side decorative board 71, and may have a clearance gap. From the viewpoint of earlier deformation or melting of the unlocking member 55, it is preferable that the unlocking member 55 is in contact with the indoor decorative plate 71.

In FIG. 8, the figure explaining the promotion means concerning a different example was shown. FIG. 8 is a view from the same viewpoint as FIG.
As can be seen from FIG. 8, in this example, a heat transfer member 80, which is a member having high thermal conductivity, is disposed between the unlocking member 55 of the fireproof latch lock 40 and the interior decoration plate 71 as a promotion means. is there. Therefore, the unlocking member 55 is in contact with the indoor decorative plate 71 via the heat transfer member 80. As a result, when the door 20 is heated by a fire or the like that has occurred indoors, the unlocking member 55 of the fireproof latch lock 40 is heated quickly, so that the unlocking member 55 can be smoothly deformed or melted. It becomes.
Here, the material constituting the heat transfer member 80 is preferably a material having high thermal conductivity, and is preferably a metal plate such as aluminum or steel.

In FIG. 9, the figure explaining the promotion means concerning another example was shown. FIG. 9A is a perspective view of a door 20 ′ to which the promotion means of this example is applied, and FIG. 9B is a view from the same viewpoint as FIG.
As can be seen from FIGS. 9 (a) and 9 (b), in this example, as an accelerating means, on the indoor side decorative plate 71 ′, on the part where the unlocking member 55 of the fireproof latch lock 40 is located, the indoor side A hole 71′g penetrating in the thickness direction of the decorative plate 71 is provided, and a melting member 80 ′ that is a resin that is easily melted by heat is disposed in the hole 71′g. According to this, when the door 20 'is heated by a fire or the like that occurs indoors, the melting member 80' that receives heat directly melts and disappears, and the hole 71'g is opened and disposed inside thereof. Heat is provided directly to the unlocking member 55. As a result, the unlocking member 55 of the fire prevention latch lock 40 is heated quickly, so that the unlocking member 55 can be smoothly deformed or melted.
Here, the material constituting the melting member 80 ′ is preferably a resin that is melted quickly by heat and excluded from the hole 71′g. For example, a resin molded product made of a polyamide-based resin can be used.

Returning to FIG. 1, the frame 10 will be described. The frame 10 has an upper horizontal frame 11, a lower horizontal frame 12, a door-end side vertical frame 13, and a suspension side vertical frame 14 that are attached to each other along the edge of the building opening.
Then, the suspension base side of the door body 20 is connected to the suspension base vertical frame 14 of the frame body 10 by the hinge 2 so as to be swingable.
Further, the door side vertical frame 13 is provided with the holes 13a, 13b, 13c as described above, and the dead bolt 34 of the locking device 30 can enter and retreat into the hole 13a, and the hole 13b is locked. A latch 33 of the device 30 can enter and retract. A latch 45 of the fire prevention latch lock 40 can enter and retract into the hole 13c. The posture in which the latch 45 enters the hole 13c is also shown in FIGS. 7, 8, and 9B.

The joinery 1 described above operates as follows.
In a normal state, the fire-preventive latch lock 40 has the posture shown in FIGS. 5A and 5B due to the arrangement of the unlocking member 55, and the latch 45 is shown in FIG. As shown by arrows A and B in FIG. Accordingly, even when the latch 45 is in the posture of entering the hole 13c of the door-end side vertical frame 13 as shown in FIGS. 1, 7, 8, and 9B, the latch 45 is opened by opening the door body 20. Evacuates quickly from the hole 13c when pressed against the wall surface of the hole 13c. Therefore, in this state, the fire prevention latch lock 40 does not hinder the opening and closing of the door 20 by the user.
Therefore, only the locking device 30 restricts the opening operation of the door body 20 in normal times. If the dead bolt 34 of the locking device 30 enters the hole 13a of the door-end side vertical frame 13, it is locked, and if it is retracted, it is unlocked. Further, the latch 33 of the locking device 30 entering the hole 13 b of the door-end side vertical frame 13 can be unlocked by operating the handle 72.

  On the other hand, a scene in which a fire has occurred on the indoor side and the door 20 has been heated will be considered. At this time, the indoor decorative plate 71 is heated and heat is transmitted to the inside of the door body 20. The unlocking member 55 of the fire prevention latch lock 40 is deformed or melted by the transmitted heat, and the latch 45 is brought into the locked state as shown in FIGS. 6 (a) and 6 (b). According to this, the latch 45 can move only in the protruding and retracting direction indicated by the arrow A in FIG. 6B, and its swinging is restricted. Therefore, the door end side upper end part and lower end part of the door body 30 on which the fire prevention latch lock 40 is arranged cannot be retracted from the hole 13c of the door end side vertical frame 13 and are locked. Thereby, the curvature of the door end side upper-lower end part of the door 20 can be suppressed, generation | occurrence | production of the clearance gap by curvature and the spread of fire by this can be prevented.

  At this time, since the unlocking member 55 of the fire prevention latch lock 40 is provided with an accelerating means in the joinery 1 so as to be smoothly deformed or melted, the fire prevention latch lock 40 immediately enters the locked state when the door 30 is heated. Become. Therefore, before the door end side upper and lower ends of the door body 20 start to warp, it is possible to securely prevent the occurrence of gaps and the spread of fire by setting the fire prevention latch lock 40 in a locked state.

  Moreover, in the fire prevention latch lock 40, except for the unlocking member 55, the same structure as the regulation latch lock can be applied, and since the versatility is high, it is possible to provide a joinery having the above effects at a lower cost.

  The above-described unlocking member 55 is an example, and keeps the unlocked state of the fire prevention latch lock 40 in a normal state, and is deformed or melted when heated by a fire or the like to be fire prevention latch lock. Other forms may be possible as long as 40 can be locked. One example is shown in FIG.

The unlocking member 155 shown in FIG. 10 has a pair of parallel leg portions 155b extending in the same direction from both sides in the longitudinal direction of the rectangular connecting piece portion 155a, and a locking claw portion 155c is provided at the tip of each leg portion 155b. Provided. Each leg portion 155b is connected and reinforced by a reinforcing piece 155d parallel to the connecting piece portion 155a.
By inserting such an unlocking member 155 into the hole 41a of the case 41, the unlocking member 55 operates in the same manner as described above.

DESCRIPTION OF SYMBOLS 1 Joinery 10 Frame 11 Upper horizontal frame 12 Lower horizontal frame 13 Door end side vertical frame 14 Hanging origin side vertical frame 20 Door body 21 Outdoor decoration board 22-25 Core material 30 Locking device 40 Fire prevention latch lock 41 Case 45 Latch 55 Unlocking member

Claims (4)

Frame,
A door in which the outdoor decorative plate and the indoor decorative plate are arranged at a predetermined interval, arranged in the framework of the frame, and
A latch lock disposed between at least one of the door side upper part and the door side lower part among the outdoor side decorative plate and the indoor side decorative plate,
The latch lock is
Case,
A latch held by the case so as to protrude and swing relative to the case;
Mechanism for switching a locked state in which the swing is restricted at the position where the latch is protruded with respect to the case, and unlocked state in which the latch is maintained freely protrude and retract freely and swing with respect to the casing, and And an unlocking member that is disposed between the outdoor decorative plate and the indoor decorative plate, and the mechanism is in the locked state by heat,
A joinery comprising means for deforming or melting the unlocking member. Means for deforming or melting the unlocking member,
The fitting according to claim 1, wherein the fitting is arranged in contact with the indoor decorative board side. Means for deforming or melting the unlocking member,
The joinery according to any one of claims 1 to 2, wherein the unlocking member is in contact with the indoor decorative plate via a heat transfer member. Means for deforming or melting the unlocking member,
4. The interior decoration plate according to claim 1, wherein a hole is provided in a portion where the unlocking member is disposed, and the hole is filled with a resin that is melted by heat. Joinery.

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