JP5714292B2 - Locking device and joinery - Google Patents

Description

  The present invention relates to a locking device that can prevent a locking piece that locks a shoji or the like from coming off in the event of a fire, and a fitting including the locking device.

  Some doors installed at entrances and entrances have built-in windows for ventilation. In such doors, a simple locking device that locks the shoji of the window is provided indoors. In this locking device, a locking button and an unlocking button are provided on a resin case, and when the locking button is pressed, a plate-shaped locking piece protrudes from the back of the case, and the locking piece engages between the shoji and frame. Was locked, and the locking piece retracted when the unlock button was pressed. In such a locking device, when a fire breaks out, parts are melted by the heat of the fire, or external force is applied to the locking piece due to severe vibration or deformation of the wall caused by collapse of furniture etc. There was a risk of the occurrence of fire and the spread of fire spread.

Patent Documents 1 and 2 describe a joinery including a locking mechanism that engages an engagement member between a frame body and a door in the event of a fire to prevent the door from being deformed or dropped off. The engaging member is urged by a spring in the protruding direction, and is normally held in a retracted state by a regulating member formed of thermoplastic resin. When a fire breaks out and the regulating member melts, the engaging member is It protrudes with the force of a spring and engages with a hole provided in the frame.
In the above conventional structure, the door can be locked by automatically projecting the engagement member due to heat in the event of a fire, but in the event of a fire, intense air current due to heat, vibration due to collapse of furniture etc., deformation of the wall surface, etc. Accordingly, when an external force larger than the biasing force of the spring is applied to the engaging member in the direction opposite to the protruding direction, the engaging member is retracted, and then the engagement of the engaging member is released and the door falls off, and the spread of fire spreads at once. There is a fear.

Japanese Patent No. 2901898 Japanese Patent No. 4494349

  In view of the actual situation described above, an object of the present invention is to provide a locking device and a fitting capable of preventing a locking piece from being detached when a fire occurs.

In order to achieve the above object, the locking device according to the first aspect of the present invention includes a locking piece made of a refractory metal movable between a locking position and an unlocking position, and a fireproof component for fixing the locking piece at the locking position. The fireproof component is operated at high temperature only in the event of a fire, and the locking piece functions as a locking device in normal times . A “refractory metal” is a metal that does not melt easily by the heat of a fire, specifically, steel, stainless steel, brass, or a metal having a melting point equal to or higher than these.

A locking device according to a second aspect of the present invention includes a locking piece made of a refractory metal that is movable between a locking position and an unlocking position, and a fire prevention component that fixes the locking piece in the locking position. The fire prevention parts are only operated at high temperatures, and the fire prevention parts are made of a fire-resistant metal control bracket that can be moved between a fixed position where the locking piece is fixed and a non-fixed position where the locking piece is not fixed. It has a spring made of a refractory metal that urges toward the, and a regulation fitting holding member that holds the regulation fitting in an unfixed position except during a fire.

  The locking device according to the invention of claim 3 has a metal plate made of a refractory metal in addition to the structure of the invention of claim 1 or 2, and the locking piece can be moved forward and backward from a hole provided in the metal plate. It is characterized by.

  According to a fourth aspect of the present invention, in addition to the structure of the third aspect of the present invention, the fire-proof component includes a restriction metal fitting made of a refractory metal provided on a metal plate so as to be movable toward the lock piece, and a restriction metal fitting. It consists of a spring made of refractory metal that urges the locking piece toward the locking piece and a restriction fitting holding member that holds the restriction fitting at a position away from the locking piece. When the holding of the restriction metal by the restriction metal holding member is released, the restriction metal moves toward the lock piece and engages with the lock piece at the lock position.

  In addition to the configuration of the invention of claim 2 or 4, the locking device holding member according to the invention of claim 5 is made of resin, and is regulated by melting of the restriction fitting holding member by heat of fire. The holding of the metal fitting is released.

  In addition to the configuration of the invention according to claim 5, the locking device holding member has a thin portion inserted inside the hole of the metal plate, and the restriction fitting is a thin portion. And is held at a position away from the locking piece.

  The locking device according to the seventh aspect of the invention has a hollow hole in the metal plate and the regulating bracket in addition to the configuration of the invention according to the fourth, fifth or sixth aspect, and the spring is disposed in the hollow hole. It is characterized by being.

  In addition to the structure of the invention of claim 4, 5, 6 or 7, the locking device according to the invention of claim 8 is arranged on one side of the hole through which the locking piece on the metal plate is inserted. In the event of a fire, a restricting bracket is engaged with one side of the locking piece, and an edge of the other side of the hole of the metal plate is engaged with the other side of the locking piece so as to sandwich the locking piece.

  According to a ninth aspect of the present invention, in addition to the structure of the fourth, fifth, sixth, seventh or eighth aspect of the invention, the restricting bracket restricts rattling of the locking piece when engaged with the locking piece. It has the control part to perform.

  A fitting according to a tenth aspect of the present invention includes a frame, a door supported by the frame, and the locking device according to any one of the first to ninth aspects for locking the door.

  In the locking device according to the first aspect of the present invention, when a fire occurs, the fire-proof component operates due to the high temperature of the fire and fixes the locking piece in the locking position, so that the locking piece does not come off even when an external force is applied to the locking piece. The doors such as shoji screens can be kept locked to prevent the doors from dropping and deforming, and the spread of fire spread can be suppressed. In addition, since the fire-proof component operates only in the event of a fire, the locking piece is not fixed by the fire-proof component in normal times, and functions as a normal locking device.

  In the locking device according to the second aspect of the invention, since the regulating bracket is held by the regulating bracket holding member in the non-fixed position where the locking piece is not fixed except during a fire, the locking piece is moved and the unlocking operation is normally performed. When a fire occurs, the holding by the restriction metal holding member is released, and the restriction metal moves to a fixing position where the lock piece is fixed by the force of the spring, so that the locked state can be stably maintained.

  The locking device according to the invention of claim 3 has a metal plate made of a refractory metal, and the locking piece can be moved forward and backward from the hole provided in the metal plate, so that the locking piece is stably held by the hole of the metal plate. In addition, since the metal plate does not deform or melt in the event of a fire, the function of locking the locking piece by the fireproof component can be stably operated.

  According to a fourth aspect of the present invention, there is provided the locking device according to the first aspect of the present invention, in which the fire prevention part is made of a fire-resistant metal provided on the metal plate so as to be movable toward the lock piece, and fire resistance is applied to bias the restriction metal fitting toward the lock piece. It consists of a spring made of metal and a regulating bracket holding member that holds the regulating bracket at a position away from the locking piece.When the temperature rises in the event of a fire, the holding of the regulating bracket by the regulating bracket holding member is released, and the regulating bracket becomes a locking piece. Since it moves toward and engages with the locking piece in the locking position, the locking piece can be securely fixed by the restricting bracket in the event of a fire.

  In the locking device according to the fifth aspect of the present invention, since the restriction metal holding member is made of resin, in the event of a fire, the restriction metal holding member is melted by the heat of the fire and the holding of the restriction metal is released. With this, you can work the function to lock the locking piece stably.

  According to a sixth aspect of the present invention, there is provided a locking device having a thin portion inserted inside the hole of the metal plate in the restricting metal holding member, and the restricting metal being held in contact with the thin portion and away from the locking piece. As a result, the thin-walled part melts in a short time in the event of a fire, and the restriction of movement of the restriction bracket is released, and the stroke when the restriction bracket is engaged can be made as small as possible. The lock function can be quickly and stably operated. Further, during daily use, the locking portion can smoothly move forward and backward with the thin portion serving as a guide.

  In the locking device according to the seventh aspect of the present invention, the metal plate and the regulation fitting have a hollow hole, and the spring is arranged in the hollow hole, so that the regulation fitting and the spring can be arranged compactly in a narrow space.

  In the locking device according to the eighth aspect of the present invention, the restriction fitting is arranged on one side of the hole through which the locking piece on the metal plate is inserted, and in the event of a fire, the restriction fitting is arranged on one side of the locking piece and the other of the locking piece. Since the edge of the other side of the hole of the metal plate is engaged with the side so as to sandwich the locking piece, the locking piece can be more reliably fixed.

  The locking device according to the ninth aspect of the present invention has a restricting portion that restricts rattling of the locking piece when the locking member is engaged with the locking piece, so that the locking piece is prevented from rattling. It can be made even more reliable.

  Since the fitting according to the invention of claim 10 includes the frame, the door supported by the frame, and the locking device according to any one of claims 1 to 9 for locking the door, a fire has occurred. Since the locking piece is sometimes fixed at the locking position, it is possible to surely prevent the door from falling off and suppress the spread of fire.

It is the longitudinal cross-sectional view which shows operation | movement of a fire prevention part, (a) is a normal state, (b) is the state when the resin member is burned down by fire, (c) is the resin member and the housing burned down by fire The state of time is shown. It is a front view which shows operation | movement of a fire prevention component, (a) is a normal state, (b) is a state when the resin member is burned down by fire, (c) is when the resin member and the housing are burned down by fire Shows the state. It is a disassembled perspective view of a fire prevention component. (A) is a rear view of a locking device, (b) is AA sectional drawing, (c) is a front view of a locking device. It is the perspective view which looked at the locking device from the back side, (a) shows the state at the time of locking, and (b) shows the state at the time of unlocking. It is a room inner side front view of the door with a raising / lowering window provided with the locking device of this invention. It is a cross-sectional view of the door. (A) is the figure which looked at the state which the locking piece engaged with the lock receptacle from the outdoor side, (b) is the same side view. It is an example at the time of applying to the crescent which locks a sliding shoji, (a) is the figure which looked at the crescent at the time of unlocking from the back, (b) is a normal locked state, (c) is a fire Indicates the locked state at the time. It is another example at the time of applying to the crescent which locks a sliding shoji, (a) is the figure which looked at the crescent of the normal locked state from the front, (b) is an indoor side view at this time And (c) is an indoor side view showing a locked state at the time of a fire. It is an example at the time of applying to the sublock which locks a sliding shoji, (a) is the figure which looked at the sublock of the normal locked state from the top, (b) is an indoor side view at this time And (c) is an indoor side view showing a locked state at the time of a fire.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 6 and 7 show an embodiment of the joinery of the present invention, and show a door 18 with a raising / lowering window provided at an entrance or a doorway. The door 18 has a rectangular casing 15 formed by assembling an upper rod 19, a lower rod 20, a hanging rod 21, and a door rod 22 made of an aluminum alloy extruded shape. The door toe 22 has two rows of indoor and outdoor grooves 23a and 23b that are open on the inner peripheral side, and the inner and outer nails 16a and 16b are respectively held in the grooves 23a and 23b so as to be vertically movable. The inner child 16a and the outer child 16b move up and down in conjunction with each other by an interlocking mechanism using a gear or the like (not shown). A locking device 17 is attached to the interior side surface of the suspension arm 21, and the locking piece 2 protruding from the back surface of the locking device 17 is engaged with a lock receiver 24 provided on the inner shroud 16a. The shoji 16b is locked.

As shown in FIGS. 4 and 5, the locking device 17 includes a resin housing 25 whose back side is open and a stainless steel metal plate 4 that closes the back surface of the housing 25. A screw insertion hole 26 having an elongated hole shape in the vertical direction is provided at two locations, and a screw 27 inserted through the screw insertion hole 26 is screwed into a back plate 37 disposed in the groove 23a of the suspension hook 21 to be suspended. It is attached to 21 indoor side surfaces. Covers 28 that slide up and down are attached to the upper and lower portions of the housing 25 so that the screws 27 can be hidden by the cover 28.
The housing 25 is provided with a locking button 13 and an unlocking button 14 that can be projected and retracted on the front side, and the locking button 13 and the unlocking button 14 have a seesaw-shaped part 29 as shown in FIG. When the locking button 13 is pushed by this component 29, the unlocking button 14 protrudes, and when the unlocking button 14 is pushed, the locking button 13 protrudes. Inside the locking button 13, a metal locking piece holding member 30 is provided. The locking piece 2 is held by the locking piece holding member 30 so as to be slidable in the front-rear direction, and locked by a built-in spring 31. The piece 2 is biased in the protruding direction. As shown in FIG. 3, the locking piece 2 is formed in a plate shape with a stainless steel plate, and engagement grooves 32a and 32b are formed in an upper edge portion and a lower edge portion. As shown in FIG. 5, when the locking button 13 is pushed in, the locking piece 2 protrudes from the back side of the case 1 (locking position). When the unlocking button 14 is pushed in and the locking button 13 protrudes, the locking piece 13 enters the case 1. Retract (unlocked position).

  As shown in FIG. 8, the lock receiver 24 is formed in a plate shape with a stainless steel plate, and is provided with notches 38 a and 38 b that engage with the locking piece 2 at two locations, the inner and outer doors 16 a, When 16b is closed and the locking button 13 of the locking device 17 is pushed in, the locking piece 2 engages with the upper notch 38a of the lock receiver 24. The notch 38 a has a clearance 39 in the vertical direction with respect to the locking piece 2, but the insertion hole 26 of the screw 27 for attaching the locking device 17 is a long hole in the vertical direction. By adjusting the mounting position of the locking device 17 so that the clearance 39 between the edge and the notch 38a is as small as possible, rattling during locking of the inner / outer shoji 16a, 16b is prevented. The notch 38b on the lower side of the lock receiver 24 is to be engaged with the locking piece 2 when locking with the inner and outer shoji 16a and 16b being opened a little.

The locking device 17 includes a fire prevention component 3 on the metal plate 4 that fixes the locking piece 2 at the locking position when a fire occurs in a state where the inner and outer obstacles 16a and 16b are locked. As shown in FIGS. 1 to 3, the fire prevention component 3 includes a restriction metal 6, a coil spring 7, and a resin member 8. The restriction metal 6 and the coil spring 7 are made of stainless steel.
As shown in FIG. 3, the metal plate 4 has a hole 5 through which the locking piece 2 is inserted formed in a vertically long rectangle. The hole 5 is formed wider than the thickness of the locking piece 2. The reason why the two holes 5 are formed side by side is to be able to cope with the difference between the left and right sides. In this embodiment, the locking piece 2 is inserted into the right hole 5 when viewed from the front. Yes. Further, the metal plate 4 has a hollow hole 11 formed below the hole 5 through which the locking piece 2 is inserted. At the left and right edge portions of the hollow hole 11, there are provided restriction metal holding pieces 33 formed by bending and raising so as to be bent in an L shape toward the front side. A spring hook 36 is provided at the top of the hollow hole 11. The upper and lower ends of the metal plate 4 are provided with locking portions 34 that are locked to the housing 25.

As shown in FIGS. 2 and 3, the restriction fitting 6 has a substantially rectangular ring shape with a hollow hole 12. The upper part of the restricting metal fitting 6 extends in the left-right direction, and a recess 35 is formed at the upper edge. As shown in FIG. 2, both sides of the restricting metal fitting 6 are held by the restricting metal holding pieces 33 provided on both sides of the hollow hole 11 of the metal plate 4 and are mounted on the metal plate 4 so as to be movable in the vertical direction. . The coil spring 7 is disposed in the hollow holes 11 and 12 of the metal plate and the regulation metal fitting, and is locked to the spring hooking portion 36 of the metal plate 4 and the lower part of the regulation metal fitting 6. It is biased upward.
The resin member 8 is formed of a thermoplastic resin. As shown in FIG. 3, the thin portion 9 inserted into the hole 5 through which the locking piece 2 of the metal plate 4 is inserted projects to the back surface side. Is formed. Further, the resin member 8 is formed with a claw portion 10 that is inserted into the restriction metal 6 and the hollow holes 11 and 12 of the metal plate 4 so as to protrude to the back surface side.

  After attaching the restricting bracket 6 and the coil spring 7 to the metal plate 4 and then assembling the resin member 8 on the metal plate 4, as shown in FIGS. 1 (a) and 2 (a), the thin portion 9 of the resin member 8 is obtained. Are arranged along the inner sides of the left and right edges of the hole 5 of the metal plate 4. The restricting metal fitting 6 is held at a position where the upper edge is in contact with the lower end of the thin portion 9 of the resin member 8 and slightly spaced downward from the locking piece 2. Further, the left and right sides of the locking piece 2 are guided by the thin portion 9 of the resin member 8, and the locking piece 2 smoothly moves forward and backward from the hole 5 of the metal plate 4 according to the operation of the locking / unlocking buttons 13 and 14. The claw portion 10 of the resin member 8 is inserted into the hollow holes 11 and 12 of the restriction metal 6 and the metal plate 4 and is locked to the back side of the restriction metal 6. Accordingly, the resin member 8 is held so as not to be separated from the metal plate 4, and the fire prevention component 3 is integrated into the metal plate 4 in a compact manner.

Next, the operation of the fire prevention component 3 will be described. 1A and 2A, the upper edge of the restriction fitting 6 comes into contact with the lower end of the thin portion 9 of the resin member 8 so that the restriction fitting 6 is separated from the locking piece 2 as shown in FIGS. Since the restricting bracket 6 does not hinder the forward / backward movement of the locking piece 2, the locking piece 2 moves forward / backward by operating the locking / unlocking buttons 13, 14 as in the conventional locking device. To do. As described above, the locking piece 2 is provided so as to be slidable in the front-rear direction with respect to the locking button 13 and urged in the protruding direction by the spring 31. When a force is applied to push the locking piece 2, the locking piece 2 is retracted while the locking button 13 remains pressed.
When a fire occurs, the resin member 8 is melted by heat and burned out. Then, as shown in FIGS. 1 (b) and 2 (b), the restricting metal fitting 6 is not restricted by the thin portion 9, so that the coil spring 7 is attached. The concave portion 35 of the restricting metal fitting 6 engages with the engaging groove 32b on the lower side of the locking piece 2 in the protruding state, and is fixed so that the locking piece 2 is not retracted. At this time, as shown in FIG. 2 (b), the recess 35 of the restricting bracket 6 is engaged with the engaging groove 32b of the locking piece 2, so that the locking piece 2 is only restricted from moving indoors and outdoors. In addition, rattling of the locking piece 2 in the lateral direction (left-right direction) is also restricted.
Further, when the housing 25 is melted and burned by the heat of the fire, the metal plate 4 is lowered by its own weight because the insertion hole 26 of the mounting screw is an elongated hole in the vertical direction, and FIG. 1 (c) and FIG. ), The upper edge 5a of the hole 5 of the metal plate 4 is inserted into the upper engaging groove 32a of the locking piece 2, and the restricting fitting 6 is inserted into the lower engaging groove 32b of the locking piece 2 from above and below. Thus, the locking piece 2 is more firmly fixed in a protruding state.

  As described above, the locking device 17 includes the fire prevention component 3 that operates only in the event of a fire, and when the fire occurs, the regulating member 6 is in the locking position as the resin member 8 is melted by the heat of the fire. Since the locking piece 2 engages with the locking piece 2 and is fixed at the locking position, the locking piece 2 is not detached from the lock receiver 24 even when an external force is applied to the locking piece 2, and the shoji 16 a and 16 b are brought into the locked state. While maintaining it, the shoji 16a and 16b can be prevented from falling off to prevent the spread of fire. The restricting metal fitting 6 is held in a position separated from the locking piece 2 in contact with the lower end of the thin portion 9 of the resin member 8 that also serves as a guide for the locking piece 2, so that even if the entire resin member 8 does not burn out, the thin portion As long as 9 is melted, it can be engaged with the locking piece 2 and the stroke of the restricting metal fitting 6 at the time of engagement can be set small, so that it can be quickly engaged with the locking piece 2 when a fire occurs. In addition, by providing the recess 35 on the upper edge of the restricting bracket 6 and engaging the locking piece 2 with the recess 35, it is possible to restrict the rattling of the locking piece 2 in the lateral direction. Since the fire prevention component 3 is composed of a plate-shaped restriction fitting 6 and a resin member 8 disposed on the metal plate 4, it is easy to incorporate into the locking device 17, and a coil spring 7 for moving the restriction fitting 6 is provided. The thickness of the fire protection component 3 can be further reduced by arranging the inside of the hollow holes 11 and 12 formed in the restriction metal 6 and the metal plate 4. Furthermore, by inserting the claw portion 10 protruding from the resin member 8 into the metal fitting 4 and the hollow holes 11 and 12 of the metal plate 4, the fire protection component 3 can be compactly integrated and attached to the metal plate 4. Further, since the locking device 17 has the metal plate 4 on the back side of the case 1 and the locking piece 2 can be moved forward and backward from the hole 5 provided in the metal plate 4, the locking piece 2 is moved by the hole 5 of the metal plate 4. While being able to hold stably, since the metal plate 4 does not deform | transform or melt | dissolve at the time of a fire, the function which locks the locking piece 2 by the fire-proof component 3 can work stably. Furthermore, by engaging the upper edge 5a of the hole 5 of the metal plate 4 and the restricting metal fitting 6 so as to be sandwiched from above and below the locking piece 2, the protruding locking piece 2 can be more firmly fixed.

FIG. 9 shows an example in which the present invention is applied to a crescent 40 for locking a sliding shoji that slides in the left-right direction. The crescent 40 includes a case 42 that is attached to a summoning lance 41 and a locking piece 44 that is pivotally supported by a lever 43 on the outside of the case 42. As shown in FIG. If the lever 43 is unlocked when the lever 43 is downward, and the lever 43 is upward as shown in FIG. 9B, the locking piece 44 engages with the crescent receiver 46 attached to the armature summoning collar 45, so Is locked.
A cam plate 47 that rotates together with the locking piece 44 is provided inside the case 42, and the cam plate 47 is provided with a notch 48 at a position that is directly above when locked. A torsion spring 49 is disposed in a contracted state above the cam plate 47 in the case 42, and a resin plate 50 is installed between the torsion spring 49 and the cam plate 47. Reference numeral 51 in the drawing is a coil spring that assists in the turning operation of the locking piece 44. The locking piece 44, the cam plate 47, and the torsion spring 49 are made of stainless steel. In the present embodiment, the torsion spring 49 and the resin plate 50 correspond to the fireproof component 3.
As shown in FIGS. 9A and 9B, the crescent 40 is affected by the torsion spring 49 because the resin plate 50 is interposed between the cam plate 47 and the torsion spring 49 as shown in FIGS. The locking piece 44 can be rotated and unlocked without receiving. When a fire occurs, as shown in FIG. 9C, the resin plate 50 melts and disappears due to the heat of the fire, the torsion spring 49 extends, and the tip 49a is locked to the notch 48 of the cam plate 47. Thus, the locking piece 44 is fixed at the locking position.

FIG. 10 shows another example of the crescent 40. As shown in FIG. 10B, the crescent 40 of this embodiment has a restriction block 52 embedded in the tip of the lever 43 from the case 42 side. The restriction block 52 is embedded in the case 42 by a coil spring 53. Normally, the hole in which the restriction block 52 is embedded is blocked by the resin plate 50 so that the restriction block 52 does not jump out. The restriction block 52 and the coil spring 53 are made of stainless steel. In the present embodiment, the restriction block 52, the coil spring 53, and the resin plate 50 correspond to the fireproof component 3.
When a fire occurs, as shown in FIG. 10C, the resin plate 50 melts and disappears due to the heat of the fire, so that the restriction block 52 is pushed by the coil spring 53 and protrudes from the lever 43 and is provided in the case 42. When the restriction block 52 is engaged with the receiving hole 54, the locking piece 44 is fixed at the locking position.

FIG. 11 shows an example in which the present invention is applied to a sub-block 55 for locking a sliding shoji that slides in the left-right direction. As shown in FIG. 11 (a), the sub-block 55 includes a case 57 attached to the outer shoji 56 and a locking piece 58 that moves like a seesaw and moves in and out of the case 57. The inner and outer shoji are locked by colliding with the inner shoji summon 41.
As shown in FIG. 11 (b), the locking block 58 is perforated from below with a restriction block 52 embedded therein, and the restriction block 52 is biased downward by a coil spring 53. The hole in which the restriction block 52 is embedded is blocked by the resin plate 50 so that the resin does not jump out. The locking piece 58, the restriction block 52, and the coil spring 53 are made of stainless steel. In the present embodiment, the restriction block 52, the coil spring 53, and the resin plate 50 correspond to the fireproof component 3.
When a fire occurs, as shown in FIG. 11C, the resin plate 50 melts and disappears due to the heat of the fire, so that the restriction block 52 is pushed by the coil spring 53 and protrudes downward from the locking piece 58, and the restriction block The locking piece 58 is fixed to the locking position by hooking 52 on the case 57.

  The present invention is not limited to the embodiments described above. The fire prevention component 3 is not limited to one that operates when the resin member 8 melts in the event of a fire, and may be one that utilizes, for example, a shape memory alloy. The form of the locking piece 2 is arbitrary, and is not limited to a plate-like shape, and may be a rod-like shape or a sickle-like shape. The shape and mounting method of the resin member 8 can be changed as appropriate. The locking device of the present invention may not have the locking / unlocking operation sections 13 and 14, and the locking piece protrudes with a spring force in a fire as described in Patent Documents 1 and 2 according to the present invention. A combination of fire prevention parts 3 may also be used. The locking device of the present invention is not limited to locking the shoji of the raising / lowering window, but can also be used to lock the shoji that slides to the left and right, the shoji that rotates, and the door.

DESCRIPTION OF SYMBOLS 1 Case 2 Locking piece 3 Fire prevention parts 4 Metal plate 5 Hole 6 Restriction metal fitting 7 Coil spring (spring)
8 Resin member (regulator fitting holding member)
9 Thin-walled portion 10 Claw portion 11 Metal plate hollow 12 Restriction bracket hollow 13 Locking button (locking / unlocking operation part)
14 Unlock button (lock / unlock operation part)
15 Frame (frame)
16a Inner shoji (door)
16b Shoji (door)
17 Locking device 35 Concave part (regulator part)
40 Crescent (locking device)
44 Locking piece 49 Torsion spring (regulator bracket and spring)
50 Resin plate (regulator fitting holding member)
52 Restriction block (regulation bracket)
53 Coil spring
55 Sublock (Locking device)

Claims (10)

A locking piece between the locked position and the unlocked position consisting movable refractory metal, and a fire protection component for fixing the locking piece in the locking position, fire part only in a fire, operated by high-temperature, normal time is A locking device, wherein the locking piece functions as a locking device. It has a locking piece made of fire-resistant metal that can move between the locking position and the unlocking position, and a fire prevention part that fixes the locking piece in the locking position, and the fire prevention part operates at high temperature only in the event of a fire, The fire prevention parts are made of a fire-resistant metal made of a fire-resistant metal that can move between a fixed position for fixing the locking piece and a non-fixed position where the locking piece is not fixed, and a fire-resistant metal that biases the restriction metal toward the fixed position. A locking device comprising: a spring; and a regulating bracket holding member that holds the regulating bracket in an unfixed position except during a fire.   3. The locking device according to claim 1, further comprising a metal plate made of a refractory metal, wherein the locking piece is movable forward and backward through a hole provided in the metal plate.   The fire prevention parts are made of a fireproof metal made of fireproof metal provided on the metal plate so as to be movable toward the lock piece, a spring made of fireproof metal that urges the fire prevention metal toward the lock piece, and the lock metal piece. The restriction metal holding member is a member that releases the holding of the restriction metal when the temperature becomes high during a fire, and the holding of the restriction metal by the restriction metal holding member is released. 4. The locking device according to claim 3, wherein the restricting bracket moves toward the locking piece and engages with the locking piece at the locking position.   5. The locking device according to claim 2, wherein the restriction metal holding member is made of resin, and the holding of the restriction metal is released when the restriction metal holding member is melted by the heat of a fire.   The restriction metal holding member has a thin portion inserted inside the hole of the metal plate, and the restriction metal is held in a position apart from the locking piece in contact with the thin portion. 5. The locking device according to 5.   The locking device according to claim 4, 5 or 6, wherein the metal plate and the regulating fitting have a hollow hole, and a spring is disposed in the hollow hole.   The restricting bracket is arranged on one side of the hole through which the locking piece on the metal plate is inserted. In the event of a fire, the restricting fitting is on one side of the locking piece, and the other side of the locking piece is on the other side of the hole of the metal plate. 8. The locking device according to claim 4, 5, 6 or 7, wherein the edge is engaged so as to sandwich the locking piece.   9. The locking device according to claim 4, 5, 6, 7, or 8, wherein the restricting bracket includes a restricting portion that restricts rattling of the locking piece when engaged with the locking piece.   A joinery comprising the frame, a door supported by the frame, and the locking device according to any one of claims 1 to 9 for locking the door.

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