JP2577851Y2 - Door locking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door locking device.

[0002]

2. Description of the Related Art As a lock device of this type, for example,
BACKGROUND ART A fire door used as a kind of door is known. Such a lock device is used by being fixed to a wall portion of a building or the like, has a hook-shaped claw plate (latch), and in a normal state, a fire door is hooked on the claw plate ( In the event of a fire or the like, the fire door is released (unlocked), and the fire door is opened to close the passage. In this type of device, normally, the above unlocking operation is performed electrically using a solenoid or the like, and a fire door is opened and a passage is closed in conjunction with a fire alarm or the like.

[0003] By the way, in the above device,
A mechanism has been provided that allows the fire door to be forcibly released manually in preparation for failure of the release means by the electric system, such as disconnection of the electric cable in the event of a fire. 15 to 17 are known. The devices shown in these figures are housed inside a casing 1, and an opening 1a for inserting an engaging member 2 attached to a fire door is formed at an upper portion of the casing. Further, inside the casing 1, a claw plate 3 and a hook plate 4 are rotatably provided so as to be overlapped by the same rotation shaft 5. Nail plate 3
Is a substantially J-shaped plate-like member having a hook 3c formed at the tip thereof, and a cam 3d is cut out at the root of the hook 3c. The engaging plate 3 is provided at the base end of the claw plate 3.
e is set upright at right angles to the claw plate 3.

The latching plate 4 is a plate-like member formed in a substantially L-shape, and its leading end has an engaging step 4b facing the opposite side of the hook 3c. Is formed. On the other hand, at the base end of the latch plate 4, an engagement plate portion 4d is provided upright at a right angle to the latch plate 4, and can be overlapped with the engagement plate portion 3e. In the engagement plate portion 4d of the latch plate 4,
An adjusting screw 6 is screwed through the engaging plate 3 e of the claw plate 3. A coil spring 7 is mounted on the adjusting screw 6, one end of which is in contact with the engaging plate 3 e, and the other end is locked to the head 6 a of the adjusting screw 6. Therefore, the engaging plate 3e of the claw plate 3 is always urged toward the engaging plate 4d by the coil spring 7.

The hook 3c is urged counterclockwise by a spring (not shown) while the claw plate 3 and the latch plate 4 are rotatably supported by a rotation shaft 5. A rotating shaft 8 is provided inside the casing 1, and an L-shaped plate-shaped stopper 9 is rotatably supported on the rotating shaft 8,
It is always urged clockwise by a spring (not shown). The distal end of the stopper 9 can be engaged with the engaging step portion 4b of the latch plate 4 and comes into contact with the cam portion 3d of the claw plate 4. On the other hand, the base end of the stopper 9 is engaged with an unlocking mechanism (not shown), and the operation of the solenoid or the like of the unlocking mechanism causes the stopper 9 to release the engagement with the engaging step 4b ( (Counterclockwise in the figure)
It is adapted to be rotated.

In the device having the above configuration, as shown in FIG. 15, the stopper 9 is engaged with the engagement step 4d to regulate the counterclockwise rotation of the latch plate 4. Further, a counterclockwise force is applied from the engaging member 2 to the hook 3c from the engaging member 2 to the claw plate 3, but the coil spring 7 does not respond to the force in the detaching direction of the engaging member 2 in a normal state. Sufficient repulsion is generated to prevent the claw plate 3 from rotating relative to the hooking plate 4, so that the locked state of the engagement member 2 is maintained. Also,
In an emergency such as a fire, the stopper 9 is rotated by the operation of a solenoid or the like in conjunction with a fire alarm or the like, and the engagement with the engaging step portion 4b of the latch plate 4 is released. As a result, the latch plate 4 and the claw plate 3 rotate counterclockwise, and the engaging member 2
c, the fire door is released and the passage is closed.

[0007] When a failure occurs in the electric system or the like, a force is applied to the hook 3c of the claw plate 3 in a direction in which the engaging member 2 is disengaged, and this force causes the coil spring 7 to repel. The claw plate 3 pivots relative to the latch plate 4 if it is sufficient to compress against. By the rotation of the claw plate 3,
The tip of the stopper 9 is moved along the cam portion 3d, and comes off the engaging step 4b. Thus, the claw plate 3 and the latch plate 4 can be forcibly opened from the state where the fire door is fixed to the passage wall by rotating in the direction of releasing the engagement member 2.

By the way, the force required for the forcible unlocking operation in the above-mentioned device is usually caused by mischief of a child or the like.
It is necessary to set it so that it cannot be unlocked unnecessarily and can be unlocked as needed in an emergency,
Since it is necessary to readjust the elastic constant of the coil spring 7 after the installation according to the change over time of the elastic constant, etc., in the above-mentioned device, the length of the coil spring 7 is adjusted by turning the adjusting screw 6. Thus, the elastic force generated by the coil spring 7 can be adjusted.

[0009]

However, in the above-mentioned conventional apparatus, the following problems have arisen when adjusting the resilience of the coil spring 7. That is, FIG.
As shown in 7, with the fire door released from the device,
A screwdriver or the like is inserted through the opening 1a of the casing 1 and the adjusting screw 6 is turned. Alternatively, the claw plate 3 and the locking plate 4 are turned to the same position as the locked state to cut out the hole formed near the opening 1a. The above adjustment is performed by inserting a driver or the like and turning the adjustment screw 6. However, in the above method, since the nail plate 3 and the like are set at the locked position,
In some cases, a switch or the like of an unlocking mechanism that is interlocked with the claw plate 3 via the stopper 9 may be set to a locked state. For this reason, when fixing the engaging member 2 again after adjustment, the fire alarm or the like is activated. In some cases, a complicated operation such as locking of the engaging member 2 may be required after resetting to the unlocked state. Also, in the above method, if the adjusting screw 6 is erroneously pushed with an excessive force, the claw plate 3 or the like may be rotated and set to the locked state in the same manner as in the above case. There was a problem that complicated operations were required.

The present invention has been made in view of the above circumstances, and has as its object to provide a door locking device that can easily and surely adjust the force (holding force) required for forcible unlocking. .

[0011]

In order to achieve the above object, a door lock device according to the present invention is provided on an engaging member provided on a door and on a wall surface in a door pocket for storing the door. An engagement holding mechanism that engages with the engagement member and holds the engaged state, the engagement holding mechanism includes a substrate,
A latch provided on the substrate so as to be rotatable in the unlocking direction in a biased state and having a claw at one end for engaging a hook of the engagement member; and a latch formed at the other end of the latch. A lock fitting for locking the latch to lock the latch in a locked state, and a holding force adjusting mechanism for adjusting a holding force of the latch in a locked state. At the middle of one end and the other end.
A holding piece connected by a switch shaft and rotatable in the same direction together with the latch, and eccentrically fixed to the substrate from a connection position between the holding piece and the latch, and rotatably supporting the holding piece. A main shaft rotatably loosely supporting the latch, an adjustment screw inserted through the substrate and extending toward the holding piece,
An adjusting piece that is screwed to the adjusting screw and that moves toward and away from the holding piece by rotating the adjusting screw; and an adjusting piece that is provided between the adjusting piece and the holding piece and that always holds the holding piece. is configured to have a spring for biasing in the locking direction, the locking fitting, the locking portion is one end
And the lock is released at the position where the lock is released .

[0012]

In the door locking device of the present invention, when a force is applied to the door in a direction for forcibly opening the door, the force acts from the engaging member to the claw at one end of the latch , and the latch is actuated by the spring. It rotates around the main shaft together with the holding piece against the resilience. Since the latch is loosely supported on the main shaft,
By rotating, the locking part at the other end moves to one end side
It moves and is released from the lock fitting to unlock the lock. When the lock is released, the latch pivots in the unlocking direction so that the door can be opened. Also, when adjusting the holding force by turning the adjusting screw, the adjusting screw is pressed against the board by the spring and is not directly in contact with the latch. There is no rotation and therefore no transition to the locked state.

[0013]

1 to 14 show an embodiment of the present invention.
This will be described with reference to FIG. The lock device of the present embodiment is an example applied as a lock device of a fire door. As shown in FIGS. 4 and 5, the fire door according to the present embodiment is normally housed in the door pocket 21 and held in the locked state by the lock device.
0 has a structure that closes the opening 23 of the passage.

FIGS. 4 and 5 show the locking device of this embodiment.
As shown in FIG. 3, an engaging member 30 provided on the inner surface of the free end side of the fire door 20 and a wall provided in a door pocket 21 for storing the fire door 20 are engaged with the engaging member 30 and And an engagement holding mechanism 40 for holding the engagement state. This engagement holding mechanism 40 is housed in a box 22 attached to the wall surface of the door pocket 21.

The engagement holding mechanism 40 is shown in FIGS.
As shown in FIG. 7, a latch 43 provided with a claw 43a which is rotatably supported by the board 41 and which is engaged with the hook 31 of the engagement member 30 at one end; The locking portion 44 of the latch 43 is locked to the stopper shaft 45 by the rotation of the hook 31 in the locking direction (the rotation of the hook 31 in the engaging direction (counterclockwise in the drawing)) to lock the latch 43. A metal fitting 46, a push lever 48 for pressing the lock fitting 46 in a direction to unlock the latch 43, and a latch 50 for locking the hook 50 to a hole 49 of the push lever 48.
3 and a slide plate 51 for holding the locked state,
Operating lever 52 for moving the operating lever 52 in the direction in which it is released, a solenoid 53 for operating the operating lever 52, and a latch 43
And a holding force adjusting mechanism 60 for holding the locked state.

In the engagement holding mechanism 40 having the above-described structure, each component has the following organic relationship. Hereinafter, the engagement holding mechanism 40 will be described separately for a reset operation, a locking operation, and an unlocking operation with reference to FIGS. 6 to 13 for convenience of description.

(1) Reset Operation (FIGS. 6 to 8) The reset operation is performed after the latch 43 is unlocked.
Is performed to return to the original state. After the latch 43 is unlocked, as shown in FIG. 6, when the reset button 54 is pressed, the distal end locking portion 54 a of the reset button 54 separates upward from the step 51 a of the slide plate 51 in the figure, and Stop coming off. The slide plate 51 is slid leftward in the figure by a spring 55 that constantly biases the slide plate 51 leftward in the figure.

When the slide plate 51 slides to the left in the drawing, as shown in FIG.
Moves to the step 52b side of the groove 52a of the operating lever 52, and the spring 56 pulls the operating lever 52 counterclockwise, so that the operating lever 52 returns to the original state. At the same time, as shown in FIG.
8 into the hole 49. Thus, the reset operation of the engagement holding mechanism 40 is completed.

(2) Latch Locking Operation (FIG. 9) After the above reset operation is completed, the engaging member 3 on the fire door 20 side
0 must be engaged with the engagement holding mechanism 40 on the wall surface side in the door pocket 40 to store the fire door 20 in the door pocket 40 and hold the engaged state.

When the hook 31 of the engaging member 30 is inserted into the hook storing portion 57 of the engaging and holding mechanism 40 as shown in FIG. Due to the pressing force of 31, the latch 43 rotates counterclockwise in the drawing with the latch shaft 43b as a fulcrum. The hook 31 enters the inside of the claw portion 43a of the latch 43, and the locking portion 44 of the latch 43 is locked by the spring 46a to the lock pin 45 of the lock fitting 46 which is biased clockwise in FIG. As a result, the latch 43
Is locked.

At this time, tension is generated in the spring 47 in the same direction as the rotation direction of the latch 43, and the push lever 48
Is pressed in the same direction as the rotation direction of the latch 43. Thus, the hook 50 of the slide plate 51 is urged into the hole 49 of the push lever 48. Thus, the locked state of the latch 43 is maintained.

(3) Latch Unlocking Operation (FIGS. 10 to 13) When a fire occurs, it is necessary to automatically open the fire door 20 from the inside of the door pocket 40 by an automatic hinge, close the opening of the passage, and prevent fire from spreading. is there. In this case, the latch 43 needs to be unlocked to release the engagement between the engagement member 30 and the engagement holding mechanism 40.

Based on a detection signal from a fire detector or the like,
The solenoid 53 provided at a predetermined position on the substrate 41 is energized. As shown in FIG. 10, the solenoid 53 sucks the plunger 53a by the low current, and the solenoid connecting plate 53b pushes the operating lever 52 rightward in the figure. When the operating lever 52 is pushed rightward in the drawing, as shown in FIG.
The spring 5 is disengaged from the tip step 52b of the second groove 52a.
8 moves rightward in the figure by the urging force.

When the slide plate 51 moves rightward in the drawing, as shown in FIG.
The hook 50 of the slide plate 51 comes off. Then, as a result of the push lever 48 being pressed counterclockwise by the spring 47, the locking portion 44 of the latch 43 is disengaged from the lock pin 45, and the latch 43 is unlocked.

Then, the latch 43 rotates clockwise,
The hook 31 is separated from the claw portion 43a, and the hook 31 is removed from the hook storage portion 57 by the return force of the spring 58, and the state shown in FIG. As a result, the engagement state between the engagement member 30 and the engagement holding mechanism 40 is released, and the fire door 20 rotates to close the opening of the passage.

Next, the holding force adjusting mechanism 60, which is a feature of the present invention, will be described with reference to FIGS. The holding force adjusting mechanism 60 constitutes a mechanism for adjusting the holding force of the latch 43 in the locked state after the latch 43 is locked. This holding force adjusting mechanism 60 is shown in FIGS.
As shown in FIG. 4, a base end portion of a holding piece 62 is rotatably attached to a main shaft 61 attached to the substrate 41, and a latch 43 is attached to the main shaft 61 through a groove so as to be freely fittable. The latch 43 and the retaining piece 62 are connected to a latch shaft 43b.
Are connected to each other. Therefore, latch 4
Reference numeral 3 denotes a latch shaft which is rotatable about the latch shaft 43b independently of the holding piece 62, and which is rotatable about the main shaft 61.
It is configured to rotate in conjunction with the holding piece 62 via 3b.

The holding piece 62 is attached to the free end side of the holding piece 62.
A spring 63 for urging the free end of 2 in a counterclockwise direction
Is equipped. The spring 63 is supported by an adjusting screw 64 attached to the bottom plate 41a of the substrate 41. The biasing force of the spring 63 is adjusted by adjusting the amount of compression of the spring 63 by an adjusting piece 65 interposed between the rear end of the spring 63 and the adjusting screw 64. The adjusting screw 64 and the adjusting piece 65 constitute an urging force adjusting mechanism 66.

In the holding force adjusting mechanism 60, the spring 63 presses the holding piece 62 around the main shaft 61 in the locking direction (counterclockwise) in the locked state of the latch 43, so that the latch 43 is moved via the latch shaft 43b. A force is applied in the locking direction in conjunction with the holding piece 62, and the locked state of the latch 43 is maintained.

When the latch 43 is manually forcibly unlocked, when a force is applied to the door in a direction for forcibly opening the door, the force is applied from the hook pin 31a of the hook 31 of the engagement member 30 to the latch 43. Acting, the latch 43 rotates around the main shaft 61 together with the holding piece 62 against the elasticity of the spring 63 of the holding force adjusting mechanism 60. Latch 43
Since the lock shaft 44 is loosely supported on the main shaft 61, the locking portion 44 moves downward (one end side) by pivoting, and is disengaged from the lock shaft 45 of the lock fitting 46 to unlock the lock. When the lock is released, the latch 43 rotates in the unlocking direction, so that the door can be opened.

The holding force adjusting mechanism 60 can adjust the holding force by adjusting the amount of compression of the spring 63. The compression amount of the spring 63 can be adjusted by changing the screwing amount of the adjustment screw 64 and changing the position of the adjustment piece. When adjusting the holding force, since the adjusting screw 64 is pressed against the substrate 41 by the spring 63 and does not directly contact the latch 43, even if the adjusting screw 64 is pressed by a driver or the like, the latch 4
3 does not rotate and therefore does not shift to the locked state. In addition, the locked state of the latch 43 can be held by the engaging force holding mechanism 60 with an appropriate engaging force, so that the locking operation of the latch 43 and the unlocking operation of the latch 43 can be performed smoothly and reliably.

In the above embodiment, an example of application as a lock device when the fire door 20 is stored in the door pocket 21 has been described. However, the lock device of the present invention is not limited to the above embodiment. .

[0032]

As described above, according to the fire door locking device of the present invention, the locking state of the latch can be held by the holding force of an appropriate magnitude by the holding force adjusting mechanism. And the unlocking operation of the latch can be performed smoothly and reliably. Accordingly, an appropriate holding force of the latch in the locked state can be obtained according to the size and type of the lock device, and the function of the lock device can be reliably exerted.

Also, even if the electric system is disconnected in an emergency such as a fire, if a force is applied to the door in a direction for forcibly opening the door, the force acts on the claw portion at one end of the latch from the engaging member, The latch rotates around the main shaft together with the holding piece against the elasticity of the spring. Since the latch is loosely supported on the main shaft, by rotating, the locking portion at the other end moves to one end side, disengages from the lock fitting , unlocks the lock, and opens the door. be able to.

Further, when adjusting the holding force by turning the adjusting screw, the adjusting screw is pressed against the substrate by the spring and does not directly contact the latch. Therefore, the latch does not rotate, and therefore, does not shift to the locked state. Therefore, the force (holding force) required for forcible unlocking can be easily and reliably adjusted.

[Brief description of the drawings]

FIG. 1 is a front view of a lock device for a fire door according to an embodiment of the present invention.

FIG. 2 is a plan view of the lock device.

FIG. 3 is a side view of the lock device.

FIG. 4 is a side sectional view showing an attached state of the lock device.

FIG. 5 is a perspective view showing a fire door.

FIG. 6 is an operation diagram showing a reset operation of the lock device.

FIG. 7 is an operation diagram of the lock device.

FIG. 8 is an operation diagram of the lock device.

FIG. 9 is an operation diagram showing a locking operation of a latch of the lock device.

FIG. 10 is an operation diagram showing an unlocking operation of a latch of the lock device.

FIG. 11 is an operation diagram of the lock device.

FIG. 12 is an operation diagram of the lock device.

FIG. 13 is a front view of the main part after the latch of the lock device is unlocked.

FIG. 14 is a front view of a main part showing an operation of a holding force adjusting mechanism of the lock device.

FIG. 15 is a front view showing a conventional lock device in a locked state.

FIG. 16 is a front view of the main part.

FIG. 17 is a front view of a main part of an unlocked state showing a conventional lock device.

[Explanation of symbols]

 Reference Signs List 20 fire door 21 door pocket 30 engaging member 31 hook 40 engaging and holding mechanism 41 substrate 43 latch 43a claw portion 44 locking portion 45 lock shaft 46 lock fitting 48 push lever 49 hole 50 hook portion 51 slide plate 52 operating lever 53 solenoid 60 Holding force adjusting mechanism 61 Main shaft 62 Holding piece 63 Spring 64 Adjusting screw 65 Adjusting piece

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E05B 57/00 E05B 65/00 E05B 65/06 E05B 65/10 E05C 19/00 A62C 2/06 503 A62C 2 /twenty four

Claims (1)

(57) [Scope of request for utility model registration] 1. An engagement member provided on a door, and an engagement holding mechanism provided on a wall surface in a door pocket for housing the door to engage with the engagement member and maintain the engaged state. The engaging and holding mechanism includes a substrate, and a claw portion provided on the substrate so as to be rotatable in an unlocking direction in a biased state and having one end for engaging a hook of the engaging member. Equipped with a latch,
The latch includes a lock member that locks a locking portion formed at the other end of the latch to lock the latch in a locked state, and a holding force adjustment mechanism that adjusts a holding force of the latch in a locked state. The holding force adjusting mechanism has one end and the other end of the latch .
A holding piece connected by a latch shaft at an intermediate portion and rotatable in the same direction together with the latch; and an eccentric fixed from a connecting position between the holding piece and the latch to the substrate to rotatably support the holding piece. A main shaft that rotatably and loosely supports the latch; an adjusting screw that is inserted through the substrate and extends toward the holding piece; and a holding piece that is screwed to the adjusting screw and rotates the adjusting screw. to and away movement towards and adjusting pieces, provided between the adjusting piece and the holding piece is configured to have a spring which biases the holding piece in the locking direction always said latch, said lock fitting When the locking portion moves to one end,
A lock device for a door, wherein the lock device is disposed at a position where the lock of the door is released .