JP2013185314A - Lock release mechanism of fire door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock release mechanism of a fire door which has a simple structure and high versatility and facilitates coping with other engaging and locking mechanisms.SOLUTION: A drive shaft 110a of a solenoid 110 is pushed inside from a projected state by switching electric current application in the case of fire, whereby a slide lever 130 is moved to the right side to rotate a trigger lever 100 counterclockwise to move a release lever 91 to the right side. A stop piece 70 of an engaging and locking mechanism part is operated in a predetermined direction by the release lever 91, whereby a lock state of a fire door is released and switched to a relock prevention state. An operating lever 150 is pushed in from the relock prevention state, whereby the slide lever 130 is returned to the left side, the drive shaft 110a of the solenoid 110 is held in a state projected to one end side, and the slide lever 130 stops at the original position, and whereby the release lever 91 is also returned to the left side and engaged with the trigger lever 100 to return to a relockable initial state.

Description

  The present invention relates to a lock release mechanism for releasing a locked state in which a fire door is supported by a support mechanism in the event of a fire, etc., and has a versatility that can be applied to various support mechanisms by simplifying its structure. Concerning technology to give.

  Buildings such as buildings are provided with fire doors to ensure safety in the event of a fire. The fire door is locked in a locked state at a position along the wall or the like by a support mechanism in normal times, but in the event of a fire, the support mechanism is unlocked by remote control, etc. It becomes a movable state in which the passage can be closed.

  As a basic support mechanism for supporting such a fire door, while accepting a hook fixed to the fire door along the guide path, the hook is pushed and rotated at one end side of the support lever. When the arm enters the back, the other end of the support lever is hooked on the hook, and the return lever is restricted from moving in the return direction by the return control mechanism. This results in a locked state where the hook cannot be withdrawn.

  In the event of a fire, the force from the unlocking mechanism is applied to the return restricting mechanism to release the restricting state, and the support lever is rotated in the opposite direction to the hook entry so that the hook can be withdrawn. .

  As described above, the support device for opening and closing the fire door is roughly composed of a support mechanism portion that holds the fire door in a support state and a lock release mechanism portion that releases the support state. become. In addition, as a fire door, when the fire breaks out, the fire door, which has been unlocked once and released from the support mechanism, can be moved to the support mechanism side by mistake, is locked again (re-inserted). It is necessary to provide a re-lock prevention function to prevent a lock state).

  A specific configuration of such a support device having a support mechanism portion and a lock release mechanism portion and having a relock prevention function is disclosed in, for example, Patent Document 1.

JP 2010-133143 A

  The above-mentioned patent document 1 is made in order to realize a large release regulation capability and a re-lock prevention function with low power consumption, and a force when a fire door protrusion (hook) enters is used as a release force. Realizes a large release regulation capability by using the holding force of the magnet when not energized by a self-holding solenoid while storing it in the spring, and applying the force accumulated by energizing the solenoid to the support mechanism to release the lock It is possible to move the fire door while maintaining the re-lock prevention state, and to return to the lockable state by pushing the operation lever.

  In order to achieve this, three slide-type levers are used in addition to the self-holding solenoid and the operating lever, two of which are used for locking the locking mechanism and for preventing re-locking. Each of the restraining pieces is actuated to release the lock, and the re-lock prevention state is maintained.

  Since the lock release mechanism of Patent Document 1 employs a structure that acts on two places of the support mechanism part, the structure is complicated, and the dependency on the structure of the support mechanism part is strong and versatile. It was difficult to cope with chipping and other support mechanisms.

  An object of the present invention is to further develop the unlocking mechanism of the above-mentioned Patent Document 1, and to provide a fire door unlocking mechanism that has a simpler structure, high versatility, and can easily be applied to other supporting mechanisms. Yes.

In order to achieve the object, the fire door unlocking mechanism of the present invention comprises:
When the energizing mechanism part that receives the projection of the fire door to a predetermined position and maintains the locked state in which the movement in the return direction is restricted and releases the locked state by the movement of the specific lever in the predetermined direction, In an unlocking mechanism for releasing the locked state by applying a force to move the specific lever in the predetermined direction,
The base member (32, 120, 170, 180);
A first state supported by the base member and attracted and held in a state where the drive shaft protrudes toward one end by the magnetic force of the permanent magnet generated in a non-energized state or the magnetic force generated by the energization, and the permanent by energization A solenoid (110) that moves to the inside of the drive shaft by canceling the magnetic force of the magnet or erasing the magnetic force of the electromagnet by de-energization;
Near the one end side of the solenoid, it is supported by the base member so as to be rotatable within a plane including the length direction of the drive shaft, and the free end extends to a position where it abuts on the tip of the drive shaft of the solenoid. A pivot lever (123);
The solenoid is supported by the base member at a position near the outer periphery of the solenoid so as to be slidable in the length direction of the drive shaft of the solenoid, and is engaged with the intermediate portion of the rotating lever from a direction opposite to the drive shaft of the solenoid. A first arm portion (136) is provided, and is biased toward the other end of the solenoid by a spring (135). When the solenoid is held in the first state, the tip is applied to the drive shaft. The rotation lever that is in contact with the rotation is stopped at the first position, the solenoid is in the second state, and the drive shaft is pushed into the inside by the biasing force of the spring, so that the rotation lever A slide lever (130) that, when rotated, moves to a second position in the direction of the other end of the solenoid;
From a third position near one end of the solenoid that is supported by the base member so as to be slidable in parallel with the slide lever 130 and does not act on the specific lever of the support mechanism portion by the biasing force of the spring (92), A release lever (91) that is movable to a fourth position near the other end of the solenoid that restricts its return when the specific lever of the support mechanism is moved to the release position;
When the slide lever is in the first position and is supported by the base member so as to be rotatable within a plane including the length direction of the drive shaft of the solenoid, the release lever is engaged with the release lever. Is moved to the third position, and when the slide lever is moved to the second position, the engagement with the release lever is released in conjunction with this, and the release lever is moved to the fourth position. The trigger lever (100) to release the lock of the support mechanism and to prevent relocking;
The solenoid is slidable in a direction orthogonal to the length direction of the drive shaft and is supported by the base member in a state in which it can be pushed in from the outside. And an operation lever (150) for returning the slide lever from the second position to the first position and returning the release lever from the fourth position to the third position.

  With this configuration, in the fire door unlocking mechanism of the present invention, the solenoid is changed from the first state to the second state by the energization switching at the time of the fire occurrence, the drive shaft is pushed into the inside, and the slide lever is moved to the first state. The trigger lever is rotated by the movement from the first position to the second position, and the release lever is moved from the third position to the fourth position. By operating the specific lever of the support mechanism portion in a predetermined direction with this release lever, the fire door can be unlocked by the support mechanism portion. In this state, since the release lever at the fourth position restricts the return of the specific lever, a relock prevention state is established. Then, by pushing the operating lever, the slide lever moves from the second position to the first position side, the solenoid drive shaft is held in a state of protruding to one end side, and the slide lever stops at the first position. Further, the release lever moves from the fourth position to the third position side, engages with the trigger lever, stops at the third position, and returns to the initial state where it can be re-locked.

  Thus, the lock release mechanism of the present invention uses two slide-type levers and two rotation-type levers in addition to the solenoid and the operation lever that are energized and controls one of the slide-type levers. By acting on the specific lever, the lock is released and the re-lock prevention state is maintained, so the structure of the lock release mechanism itself can be simplified and made at low cost, and the dependency on the structure of the support mechanism part Therefore, the versatility is remarkably increased, and it is possible to cope with various kinds of support mechanisms.

The figure which looked at the support apparatus of embodiment of this invention from the front upper direction The figure which shows the structure of the support mechanism part in the lower chassis of embodiment Exploded view showing the structure of the support mechanism in the lower chassis of the embodiment The figure which shows the structure of the lock release mechanism part in the upper chassis of embodiment The figure which excluded a part of structure of the lock release mechanism part in the upper chassis of embodiment Exploded view showing the structure of the unlocking mechanism in the upper chassis of the embodiment Internal structure diagram of solenoid used in the embodiment Structure of the operating lever used in the embodiment The figure for demonstrating the operation | movement to the support state of each part in the lower chassis of embodiment The figure for demonstrating the operation | movement to the support state of each part in the lower chassis of embodiment The figure for demonstrating operation | movement of the lock release mechanism part of embodiment. The figure for demonstrating operation | movement of the lock release mechanism part of embodiment. The figure for demonstrating operation | movement of the lock release mechanism part of embodiment. The figure for demonstrating operation | movement to the cancellation | release state of each part in the lower chassis of embodiment The figure for demonstrating return operation | movement by the operation lever of embodiment The figure for demonstrating return operation | movement by the operation lever of embodiment The figure for demonstrating return operation | movement by the operation lever of embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-6 has shown the structure of the supporting device 30 including the lock release mechanism to which this invention is applied.

  As shown in FIG. 1, the support device 30 has a rectangular box-shaped lower chassis 31 and upper chassis 32 that are stacked one above the other, a front plate 170, and a back plate 180. doing.

  Here, the lower chassis 31 holds a locked state in which the projection of the fire door is received up to a predetermined position and the movement in the return direction is restricted, and the locked state is released by the movement of the specific lever in the predetermined direction. The unlocking mechanism unit 300 is formed to apply a force to the upper chassis 32 to move the specific lever in a predetermined direction when energized to release the locked state. Is formed.

  As shown in FIGS. 2 and 3, the lower chassis 31 serving as a base portion of the support mechanism 200 is formed by a bottom plate 31a, a front plate 31b, a rear plate 31c, a left side plate 31d, and a right side plate 31e. The center of the front plate 31b is notched so as to form an opening for receiving the projection P of the fire door, and the U-shaped projection P of the fire door is connected to the center of the bottom plate 31a. A guide groove 33 that forms a guide path that linearly guides the guide is formed.

  A first shaft 34 is erected near the back end of the guide groove 33 and near the left side plate 31 d, and a second shaft 35 is erected on the left side near the entrance of the guide groove 33. .

  On the first shaft 34, a support piece 41 and a capture piece 46 constituting the support lever 201 of the support mechanism section 200 are overlapped and integrated, and are attached rotatably.

  The support piece 41 includes a base portion 41a provided with a hole 42 through which the first shaft 34 is inserted, and a first portion extending from the base portion 41a to the right side plate 31e side of the lower chassis 31 intersecting the guide groove 33 with a substantially constant width. The first arm portion 41b and the second arm portion 41c extending from the base portion 41a in a direction orthogonal to the first arm portion 41b are formed in a substantially L shape.

  A rising piece 43 is formed on the side edge of the first arm portion 41b near the rear plate 31c, and a hole 44 having a screw groove is provided in the center of the rising piece 43. Further, a stepped portion 45 is formed on the distal end surface of the second arm portion 41c.

  On the other hand, the capture piece 46 includes a base portion 46a provided with a hole 47 through which the first shaft 34 is inserted, and a first arm extending from the base portion 46a to the right side plate 31e with a substantially constant width and intersecting the guide groove 33. And a second arm portion 46c extending from the base portion 46a in a direction orthogonal to the first arm portion 46b and extending in a direction facing the first arm portion 46b in parallel.

  Rising pieces 48 and 50 are formed at the center and the tip of the first arm portion 46a of the capture piece 46, respectively, and a hole 51 for inserting a screw is provided at the center of the rising piece 50. .

  The engagement piece 41 and the capture piece 46 are attached to the first shaft 34 in a state where the first arm portions and the second arm portions overlap each other, and are inserted into the holes 44 of the rising piece 43 of the engagement piece 41. The screw 53 passing through the hole 51 of the rising piece 50 of the catching piece 46 is screwed, and a coil spring 54 is sandwiched between the head of the screw 53 and the rising piece 50 of the catching piece 46. Yes.

  The engaging piece 41 and the catching piece 46 can be rotated together in a state where they overlap each other due to the repulsive force of the coil spring 54, and a strong force is applied in the direction of opening the fire door in an emergency or the like. When the force stronger than the repulsive force of the coil spring 54 is applied to the catching piece 46 in the clockwise direction, the catching piece 46 is rotated clockwise and can be forcibly released.

  A spring 65 is attached to the upper portion of the first shaft 34. One end of the spring 65 is hung on the outer side of the first arm portion 46b of the catch piece 46, and the other end is hung on the rear plate 31c of the lower chassis 31. The support piece 41 and the catch piece 46 are The spring 65 is urged to rotate clockwise (in FIG. 2), that is, in a direction in which the second arm portion of the capture piece 46 is retracted from the guide groove 33.

  On the other hand, a stop piece 70 that constitutes a specific lever for locking / releasing the locking mechanism 200 is rotatably attached to the second shaft 35.

  The restraining piece 70 includes a base portion 70a provided with a hole 71 through which the second shaft 35 is inserted, and a first arm portion 70b extending from the base portion 70a in a direction in contact with the outer periphery of the second arm portion 41c of the engaging piece 41. And a second arm portion 70d extending upward to come into contact with a slide lever 130 of an unlocking mechanism portion 300, which will be described later, and is urged to rotate counterclockwise by a spring 72.

  The tip of the first arm portion 70b is in contact with the outer periphery of the support piece 41, and the protrusion P of the fire door enters and the support piece 41 and the capture piece 46 rotate counterclockwise. When the second arm portion 46c reaches the position intersecting the guide groove 33, the second arm portion 46c engages with the stepped portion 45 on the outer periphery of the engaging piece 41 to rotate the engaging piece 41 and the capturing piece 46 clockwise (FIG. 2). ) Is restricted.

  In addition, stoppers 77 and 78 are provided at the right front end and rear end of the bottom plate 31a of the lower chassis 31 so as to come into contact with the second arm portion side of the support piece 41 and the capture piece 46 to define the rotation range thereof. Is provided. A U-shaped notch 79 is provided on the right side of the front plate 31b for passing a screwdriver (not shown) for turning a screw 53 for adjusting the elastic restoring force of the coil spring 54. As shown in FIG. 1, the front plate 170 is provided with a hole 170 a at a position overlapping the notch 79.

  The engagement mechanism 200 configured as described above is pushed by the projection P of the fire door that has entered the guide groove 33 and the support lever 201 rotates counterclockwise, so that the second arm of the capture piece 46 is rotated. When the portion 46c reaches a position where it intersects the guide groove 33, the first arm portion 70b of the stop piece 70 engages with the step 45 on the outer periphery of the support piece 41, and the support lever 201 rotates clockwise ( 2), the locked state in which the projection P of the fire door does not come out of the guide groove 33 is maintained. This locked state can be released by pushing the second arm portion 70d of the restraining piece 70 to the right (in FIG. 2) and rotating it clockwise. An unlocking mechanism 300 for performing this release is formed on the upper chassis 32 fixed so as to overlap the lower chassis 31.

  The upper chassis 32, together with the front plate 170 and the rear plate 180, constitutes the base portion of the lock release mechanism unit 300. As shown in FIGS. 4 to 6, the bottom plate 32a is similar to the lower chassis 31. The front plate 32b, the rear plate 32c, the left side plate 32d, and the right side plate 32e are formed into a shallow rectangular box shape, and the center of the front plate 32b receives the projection of the fire door together with the opening of the front plate 31b of the lower chassis 31. A notch is formed to form an opening, and a guide groove 80 that forms a guide path for guiding the projection of the fire door together with the guide groove 33 of the lower chassis 31 is formed on the bottom surface of the bottom plate 32a. ing.

  Further, a release lever guide groove 82 is formed along the rear plate 32c at the rear portion of the bottom plate 32a. In addition, a hole 83 formed in an arc shape is provided in the left portion of the bottom plate 32a so as to allow the second arm portion 70d of the restraining piece 70 to pass therethrough and not restrict its movement.

  The interval between the left end portion 82a and the right end portion 82b of the release lever guide groove 82 is set slightly wider than the thickness of a base portion 91a of the release lever 91 described later, and the interval of the intermediate portion 82c is on the outer periphery of the base portion 91a of the release lever 91. The width of the coil spring 95 is set to be slightly wider in order to bias the release lever 91 in the direction of the right side plate 32e.

  A cylindrical boss 84 is erected on the left side of the release lever guide groove 82, and an operation lever guide hole 85 is formed on the right side for receiving a distal end portion of an operation lever 150 described later and guiding it in the front-rear direction. Has been. A spring hook 86 is erected on the right front corner of the upper chassis 32.

  The release lever 91 is housed in the release lever guide groove 82 and supported in a slidable state in the lateral direction, and an arm portion 91b extending forward from the left end of the base portion 91a to a position intersecting the hole 83. The base portion 91a and the arm portion 91b have a stopper portion 91c protruding forward and having a step at the tip thereof, and a coil spring 92 is attached to the middle portion of the base portion 91a. The pin 93 for restricting the rightward movement of the coil spring 92 passes therethrough.

  The base 91a of the release lever 91 is sandwiched between the left end portion 82a and the right end portion 82b of the release lever guide groove 82, and is urged to the right by a coil spring 92 mounted therebetween. The upward movement is restricted by a presser plate 95 screwed onto the right end portion 82 b and a trigger lever 100 rotatably attached to the boss 84.

  The trigger lever 100 includes a base portion 100a provided with a hole 101 for screwing the boss 84 in a freely rotatable state, a first arm portion 100b that extends a predetermined distance to the left of the base portion 100a and bends downward, A second arm portion 100c extending a predetermined distance forward of the base portion 100a, and a third arm portion 100d extending rearward of the base portion 100a and passing above the release lever 91 to prevent its lifting, The coil spring 103 is urged clockwise between the arm portion 100d and the left end portion 82a of the release lever groove 82.

  Here, when the release lever 91 is in a predetermined position on the left side (a separated third position that does not act on the second arm portion 70d of the stop piece 70 as the specific lever), the rear portion of the first arm portion 100b of the trigger lever 100 The corner portion on the side becomes an angular position that engages with the step portion of the stopper portion 91c of the release lever 91, and the rightward movement of the release lever 91 is restricted and held at the third position. Further, from this restricted state, when the tip of the second arm portion 100c is pushed rightward and rotated, the engagement of the first arm portion 100b with the stopper portion 91c of the release lever 91 is released, and the release lever 91 is released. While moving to the fourth position on the right side, the tip of the arm portion 91b abuts on the second arm portion 70d of the stop piece 70 and moves to the right, and the stop piece 70 is rotated clockwise. As a result, the support mechanism 200 is unlocked.

  Here, the arm portion 91b of the release lever 91 that has moved to the fourth position is located in the vicinity of the left side of the second arm portion 70d of the stop piece 70 that is in the release state, and the counterpiece 70 rotates counterclockwise. Since the movement is restricted, relocking is prevented.

  On the other hand, a self-holding solenoid (also referred to as a plunger) 110 is disposed above the release lever 91 and the trigger lever 100. In this example, the solenoid is not energized during a calm period, but is always energized for a short time (for example, 1 second) in the event of a fire. However, as will be described later, the solenoid is continuously energized during a calm period. In the case of a continuous energization method that is in a non-energized state in the event of a fire, the drive shaft is held in a protruding state by the magnetic force of the energized electromagnet, not the self-holding type. A general solenoid having a structure of retracting into the base may be used.

  The solenoid 110 is fixed laterally with respect to the back plate 104 connecting the back sides of the lower chassis 31 and the upper chassis 32 and with the tip of the drive shaft 110a facing left.

  The solenoid 110 is held in the first state in which the drive shaft 110a is protruded by the magnetic force of the permanent magnet when not energized. It will be in the 2nd state which can be retracted inside by force.

  As shown in FIG. 7, the solenoid 110 applies the magnetic force of the permanent magnet 110b provided at the far end to the iron bearing 110d at the front end via the outer iron frame (yoke) 110c. The front end of the internal movable iron core 110e is strongly adsorbed and held in the first state in which the non-ferrous drive shaft 110a press-fitted into the movable iron core 110d is projected. When the magnetic force of the permanent magnet 110b is canceled by energization of the coil 110f, the adsorption between the bearing 110d and the movable iron core 110e is released, and the movable iron core 110e is moved to the back side by a weak force applied to the distal end side of the drive shaft 110a. In this state, the drive shaft 110a can be pushed into the second state, and the coil 110f can be moved into the drive shaft 110a with a small supply current. The coil spring 110g is for moving and attracting the movable iron core 110e toward the bearing 110d after the energization of the coil 110f is stopped.

  A lever support plate 120 is screwed to the side of the solenoid 110. The lever support plate 120 has a horizontally long rectangular shape, a base portion 120 a that is fixed by screws so as to be in close contact with the side surface of the solenoid 110, and a lever support portion 120 b that extends forward from the left end of the base portion 120. A rotation lever 123 is rotatably attached to the upper surface of the lever support portion 120b. The base 123a on one end side of the rotating lever 123 is screwed and supported by the lever supporting portion 120b in a rotatable state, and the tip (free end) 123b reaches a position where it can come into contact with the tip of the drive shaft 110a of the solenoid 110. A notch 123c that receives the tip of a first arm portion of a slide lever 130, which will be described later, is formed in the middle left portion.

  The lever support plate 120 is fixed to the solenoid 110 by guide screws 125 and 126, and a slide lever 130 is supported on the front side thereof so as to be slidable in the left-right direction.

  On one end side of the slide lever 130, a horizontally long notch 131 for receiving the shaft portion of the guide screw 125 is formed, and on the other end side, a horizontally long notch 132 for receiving the shaft portion of the guide screw 126 is formed. The guide screws 125 and 126 are used as guides and are slidably supported.

  A spring hook hook 133 is formed at the center of the slide lever 130, and a coil spring 135 is stretched between the hook 133 and the guide screw 126.

  Further, the first arm portion 136 extends rearward from the upper left end of the slide lever 130, and the lower portion enters the notch 123 c in the intermediate portion of the rotation lever 123 from the left. Here, the urging force of the coil spring 135 is transmitted in the direction of pushing the drive shaft 110a of the solenoid 110 through the slide lever 130 and the rotation lever 123. However, the drive shaft 110a is held by the permanent magnet of the solenoid 110. The slide lever 130 is held in a protruding state (first state) and stopped at a predetermined position (first position) near one end (near the drive shaft) of the solenoid 110.

  Note that the rotating lever 123 that is pressed against the drive shaft 110a while being in contact with the distal end receives the force of the coil spring 135 that urges the slide lever 130 between the distal end and the rotational fulcrum, The force applied to the drive shaft 110a from the part can be weakened. Therefore, the attracting force by the permanent magnet 110b can be small, and the current required to release this attracting can be reduced. In the actually used solenoid 110, the adsorption can be released by a current of about 30 mA, and the lock can be released by about 1/10 of the current required by a mechanism using a conventional solenoid.

  The second arm portion 137 protruding downward from the lower left portion of the slide lever 130 extends to the left of the second arm portion 100c of the trigger lever 100, and the slide lever 130 in the first position is connected to the solenoid 110. The force when moving to the second position on the right side by the energization driving is transmitted to the trigger lever 100, and the engagement between the trigger lever 100 and the release lever 91 is released.

  Further, the third arm portion 138 extending forward from the upper right portion of the slide lever 130 is pushed to the first taper portion 152 when the operation lever 150 (to be described later) is pushed for a predetermined stroke in a state where the third arm portion 138 is moved to the second position. Then, the slide lever 130 is returned from the second position to the first position.

  The operation lever 150 is for returning to the initial lockable state after the lock on the projection P of the fire door is released and the lock is prevented from being re-locked. As shown in FIG. 151, a first taper portion 152 formed at the left rear edge of the upper plate 151 at an angle of 45 degrees and wider toward the front, and extends forward from the center of the front end of the upper plate 151 with a predetermined width. The protruding piece 153, the operation piece 154 extending upward with the same width from the tip of the protruding piece 153, the side plate 155 extending downward from the right edge of the upper plate 151, and the connecting portion 156 extending inward from the lower portion of the side plate 155 inward. The second tapered portion 157 extends a predetermined distance outward from the connecting portion 156 at an angle of 45 degrees, and the tip 158 extends a predetermined distance rearward from the second tapered portion 157. Further, the outer shape of the side plate 155 is an inverted L shape with the front and lower parts cut out, and a coil spring 159 is hung between the vertical part and the spring hook 86 of the upper chassis 32.

  The projecting piece 153 and the operating piece 154 of the operating lever 150 project outside through a hole (not shown) provided in the front plate 103, the lower edge of the side plate 155 contacts the bottom plate of the upper chassis 32, and the tip portion 158 is supported in a state of entering the operation lever guide hole 85 and is urged forward by a coil spring 159. By pushing the operation piece 154, the first taper portion 152 and the second taper portion 157 are moved rearward. be able to.

  When the operation lever 150 is pushed backward by a predetermined stroke, the operation lever 150 moves the slide lever 130 in the second position to the left by the first taper portion 152 to return the drive shaft 110a of the solenoid 110 to the protruding state. The release lever 91 in the fourth position is moved to the left by the second tapered portion 157 and returned to the third position by returning to the engaged state with the trigger lever 100, thereby returning to the third position. When the projection of the fire door re-enters, it is returned to a state where it can be engaged.

Next, the operation of the support device 30 configured as described above will be described.
The catch piece 46 and the engaging piece 41 are pushed by the projection P (for example, a U-shaped hook) of the fire door that has entered from the state shown in FIG. 2 (initial state) as shown in FIG. 9 and resists the urging force of the first spring 65. And turn counterclockwise.

  Then, as shown in FIG. 10, when the first arm portion 46 b of the capture piece 46 pushed by the projection P of the fire door rotates to a position substantially perpendicular to the guide path formed by the guide grooves 33 and 80, the support piece 41. The first arm portion 70b of the stop piece 70 is engaged with the step portion 45, and the return of the capture piece 46 is restricted. At this time, since the second arm portion 46c of the capture piece 46 intersects the guide path so as to be substantially orthogonal to the guide path, the projection P of the fire door is supported so as not to come out of the guide path (locked state). It will be in an open state (normal).

  In this locked state, as shown in FIG. 11, the unlocking mechanism unit 300 stops the slide lever 130 at the first position on the left end side because the drive shaft 110a of the solenoid 110 is held in a protruding state. The lever 91 is stopped at the third position on the left end side engaged with the trigger lever 100.

  From this state, when the solenoid 110 is energized due to the occurrence of a fire or the like, the force for holding the drive shaft 110a in the protruding state (first state) is lost, and the second state is reached. As described above, the coil spring 135 is pushed inward by the urging force, the turning lever 123 is turned clockwise, and the slide lever 130 is moved from the first position to the right as indicated by the arrow B.

  As the slide lever 130 moves to the right, the trigger lever 100 rotates counterclockwise as indicated by an arrow C, and the engagement with the release lever 91 is released.

  Therefore, the release lever 91 moves from the third position to the fourth position on the right as indicated by the arrow D in FIG. 13, and is pushed by the arm portion 91b, so that the second arm portion 70d of the stop piece 70 is moved to the arrow E. Move to the right as

  For this reason, as shown in FIG. 14, the stop piece 70 rotates clockwise, the engagement with the engagement piece 41 is released, the rotation restriction by the engagement piece 41 is released, and the engagement piece 41 The capture piece 46 is integrally rotated clockwise, the second arm portion 46c is retracted to the side of the guide groove 33, the projection P of the fire door is pulled out of the guide groove 33, and the fire door is predetermined. Allow the passage to be closed.

  At this time, as shown in FIG. 13, since the arm portion 91b of the release lever 91 is in the vicinity of the left side of the arm portion 70d of the stop piece 70, even if the projection P of the fire door is reinserted, the stop piece 70 The counterclockwise rotation is restricted, and the engagement piece 41 cannot be engaged, and the engagement state is not established (relock prevention state).

  Then, when the operation lever 150 is pushed inward as shown by an arrow F as shown in FIG. 15 from this state, the slide lever 130 in which the third arm 138 is brought into contact with the first tapered portion 152 as shown in FIG. Moves to the left as indicated by arrow G. As a result, there is no force to push the drive shaft 110a of the solenoid 110, the drive shaft 110a protrudes as shown by an arrow H, and the protruding state (first state) is held by the attractive force of the permanent magnet. At this time, the rotation lever 123 is pushed by the projecting drive shaft 110 a and rotates counterclockwise as indicated by an arrow I, and engages with the first arm portion 136 of the slide lever 130.

  In parallel with this, the release lever 91 whose tip is in contact with the second tapered portion 157 moves to the left as indicated by an arrow J. As shown in FIG. 17, when the operation lever 150 is pushed to the far end, the stopper portion 91 c of the release lever 91 passes through the first arm portion 100 b of the trigger lever 100, and the trigger lever 100 is moved as indicated by an arrow K. By rotating clockwise, the first arm portion 100b engages with the step portion of the stopper portion 91c. When the operation lever 150 is released from this state, the state returns to the initial state shown in FIG. 13, and the projection P of the fire door is received again to return to the lockable state.

  As described above, the lock release mechanism 300 used in the support device 30 uses the two slide-type levers and the two rotation-type levers in addition to the solenoid 110 and the operation lever 150. Since one of the levers is applied to a specific lever (restraining piece 70d) of the support mechanism 200 to release the lock and maintain the re-lock prevention state, the configuration of the lock release mechanism 300 itself is remarkably simple. Can be made at low cost. Moreover, since it is only necessary to actuate the release lever on the specific lever of the support mechanism part, the dependency on the structure of the support mechanism part itself is weak, the versatility is remarkably increased, and it can be used for various support mechanisms. It becomes possible.

  In addition, the operation of returning the slide lever 130 to return the drive shaft 110a of the solenoid 110 to the protruding state is performed by operating the operation lever 150. At the same time, the release lever 91 can be returned to the initial state, which is strong. The coil spring 92 can store a strong force necessary for unlocking the support mechanism.

  The structure of the support mechanism 200 described above is an example, and the support structure of the release lever 91, the trigger lever 100, the solenoid 110, the rotation lever 123, and the slide lever 130 with respect to the base member, the shape thereof, etc. The lock release mechanism of the present invention can be applied to a support mechanism that can be deformed without departing from the gist of the present invention and is unlocked by applying a force in a certain direction to a specific lever.

  Moreover, although the said embodiment used the self-holding type solenoid in order to correspond to a constantly deenergized system, the energized system that continuously energizes the solenoid during a calm period and is deenergized when a fire occurs In this case, if a general solenoid is used that is not self-holding type, the drive shaft is held in a protruding state by the magnetic force of the energized electromagnet, and the drive shaft is pushed into the interior with a light force when deenergized. Good. In this case, for example, instead of the permanent magnet 110b of the solenoid 110 having the above-described structure, if an iron magnet core made of a soft iron material having the same shape is disposed, the drive shaft 110a is held in a protruding state by a magnetic force generated by energizing the coil. A first state and a second state in which the drive shaft 110a is pushed into the interior by de-energization can be realized.

  30... Engagement device 31... Lower chassis 32. Upper chassis 41. Locking piece 46. Capturing piece 70. Stopping piece (specific lever) 91. ... Trigger lever, 110 ... Solenoid, 123 ... Rotating lever, 130 ... Slide lever, 150 ... Operating lever

Claims (1)

When the energizing mechanism part that receives the projection of the fire door to a predetermined position and maintains the locked state in which the movement in the return direction is restricted and releases the locked state by the movement of the specific lever in the predetermined direction, In an unlocking mechanism for releasing the locked state by applying a force to move the specific lever in the predetermined direction,
The base member (32, 120, 170, 180);
A first state supported by the base member and attracted and held in a state where the drive shaft protrudes toward one end by the magnetic force of the permanent magnet generated in a non-energized state or the magnetic force generated by the energization, and the permanent by energization A solenoid (110) that moves to the inside of the drive shaft by canceling the magnetic force of the magnet or erasing the magnetic force of the electromagnet by de-energization;
Near the one end side of the solenoid, it is supported by the base member so as to be rotatable within a plane including the length direction of the drive shaft, and the free end extends to a position where it abuts on the tip of the drive shaft of the solenoid. A pivot lever (123);
The solenoid is supported by the base member at a position near the outer periphery of the solenoid so as to be slidable in the length direction of the drive shaft of the solenoid, and is engaged with the intermediate portion of the rotating lever from a direction opposite to the drive shaft of the solenoid. A first arm portion (136) is provided, and is biased toward the other end of the solenoid by a spring (135). When the solenoid is held in the first state, the tip is applied to the drive shaft. The rotation lever that is in contact with the rotation is stopped at the first position, the solenoid is in the second state, and the drive shaft is pushed into the inside by the biasing force of the spring, so that the rotation lever A slide lever (130) that, when rotated, moves to a second position in the direction of the other end of the solenoid;
From a third position near one end of the solenoid that is supported by the base member so as to be slidable in parallel with the slide lever 130 and does not act on the specific lever of the support mechanism portion by the biasing force of the spring (92), A release lever (91) that is movable to a fourth position near the other end of the solenoid that restricts its return when the specific lever of the support mechanism is moved to the release position;
When the slide lever is in the first position and is supported by the base member so as to be rotatable within a plane including the length direction of the drive shaft of the solenoid, the release lever is engaged with the release lever. Is moved to the third position, and when the slide lever is moved to the second position, the engagement with the release lever is released in conjunction with this, and the release lever is moved to the fourth position. And trigger lever (100) to release the lock of the support mechanism and to prevent re-locking,
The solenoid is slidable in a direction orthogonal to the length direction of the drive shaft and is supported by the base member in a state in which it can be pushed in from the outside. And an operation lever (150) for returning the slide lever from the second position to the first position and returning the release lever from the fourth position to the third position. Fire door unlock mechanism.

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