KR101396240B1 - Electric dual-locking devices for fireproofing door - Google Patents

Abstract

The present invention relates to an electric dual locking device for a fireproof door which includes a case installed in the fireproof door; a first locking unit installed in the inner upper part of the case; and a second locking unit installed in the inner lower part of the case. The first locking unit includes a sliding shaft; a locking head installed at the front end of the sliding shaft; first and second springs installed on the outer front and outer rear parts of the sliding shaft; a fixing piece; a stopper; and an operation cam. The second locking unit includes a rotary cam; a locking cam; a locking head installed on one side of the locking cam; a driving motor fixed to a case; and a control board on which a control circuit controlling the operation of the driving motor is mounted.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric double-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double locking device for a fire door, and more particularly, to an electric double locking device using electricity as a first locking means and a second locking means inside a case, improving bonding force of a fire door, To automatically lock each locking means in the locked state.

Generally, a fire door is a door installed in a shelter or the like to minimize the damage of a person in the event of a fire. In general, the door maintains the function of an ordinary door capable of entering and exiting people. In case of fire, Or to prevent hot air or the like from entering the inside of the shelter.

However, since dust and air flow into the room from the outside through the gap between the frame and the door from the outside, airflow of the room is leaked to the outside, so that people can freely enter and exit the room. However, There is a need.

FIG. 6 is a perspective view of a double locking device for a fire door according to the prior art, and FIGS. 7a and 7b show an internal front view showing the operation of the double locking device for a fire door according to the prior art.

6 to 7B, a double locking device for a fire door has been conventionally provided on one side of the opening of the fixing plate 516, and a case 580 having a handle 580 rotatably fixed by a fixing shaft 582 510); A locking means 520 installed inside the case 510 to open and close the fire door from the door frame by a first locking portion 524 provided at an end of the sliding shaft 522; A first link elongated hole 536 is formed in the case 510 and connected to the link assembly 150 by a guide shaft 560 so that the link operation is performed. A double locking member 530 having a second locking part 532 inserted into the door frame so as to be closed; A first rotating link 552 rotatably inserted in the link operation hole of the case 510, a second rotating link 554 connected to the first rotating link 552 and a second rotating link 554 And a guide shaft 560 to which the double locking member 530 rotatably engages; The upper and lower parts are fixed to the fixed shaft 582 and connected to the locking unit 520 and the first rotation link 552 of the link assembly 550 respectively. And an operating plate 542 for operating the means 520 is formed on the upper portion of the operating plate 542. The operating plate 542 is disposed below the operating plate 542 and contacts the first rotating link 552 along the rotating direction of the handle 580 And operating means 540 in which a plurality of link operation portions 544 for transmitting rotational force to the link assembly 550 are formed on both sides of the lower portion. 0106168)

When the knob 580 is rotated in the clockwise direction, the operating means 540 connected to the knob 580 via the fixing shaft 582 rotates in the same direction, and the locking means 520 The lock setting of the fire door is released as the first locking portion 524 of the fire door moves to the inside of the case 510.

When the knob 580 is rotated counterclockwise, the rotational force of the actuating means 540 is transmitted to the drive shaft so that the linking operation of the stationary link 552, the rotating link 554 and the double locking member 530 are sequentially performed And when the knob 580 is completely rotated counterclockwise, the second locking portion 532 of the double locking member 530 is fully inserted into the contact groove formed in the locking panel to achieve double locking.

However, in the conventional double locking apparatus for a fire door, the double locking apparatus for the conventional fire door, in which the force of the knob 580 is transmitted to the double locking member 530 through the link assembly 550, There is a problem that the components are complicated and the number of required parts is large, so that the manufacturing is troublesome and the operation of each component is not smooth, causing malfunction in the use process, parts breakage or various other troubles.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to make it possible to improve the opening and closing operability of a fire door by double locking the fire door using electricity, Which can prevent the inflow / outflow of air through the air inlet and the air outlet, and which can withstand high temperature heat and strong wind to improve the reliability of the product.

Another object of the present invention is to maximize the binding force by allowing the fire door to be completely close to the door frame so as to minimize the clearance between the fire door and the door frame by the first locking means and the second locking means using electricity, Which can prevent intrusion of flames, toxic gas, and strong wind accompanied with heat at high temperatures into the inside of the shelter.

It is a further object of the present invention to provide a locking device that automatically locks the first locking means and the second locking means when the fire door is closed and allows the locked state of the first locking means and the second locking means to be locked And an object of the present invention is to provide an electric double locking device for a fire door which can be easily released to improve the convenience of the user and the merchantability of the product.

According to an aspect of the present invention, there is provided a double locking apparatus for a fire door, comprising: a case installed inside a fire door; A first locking means provided on the upper portion of the inside of the case; And a second locking means provided in an inner lower portion of the case.

In the double locking apparatus for a fire door according to the present invention, the first locking means provided in the upper portion of the case may include a sliding shaft installed to the case so as to be movable in the lateral direction; A locking head installed at the tip of the sliding shaft; A first spring and a second spring installed at a circumferential front portion and a circumferential rear portion of the sliding shaft to elastically support the sliding shaft in a lateral direction; A fixed piece installed at the center of the outer periphery of the sliding shaft; A stopper fixed to the case and restricting the movement of the fixed piece and the sliding shaft; And an operation cam provided on the case so as to be freely rotatable and having an operation protrusion which is in contact with the fixing piece at an upper portion thereof and connected to the handle of the front face of the fire door.

In the double locking apparatus for a fire door according to the present invention, the second locking means provided on the inner lower portion of the case includes a rotation cam provided on the case so as to be freely rotatable and having an operating gear formed on its outer periphery; A locking cam provided on the case so as to be freely rotatable and having a connection gear formed on an outer periphery thereof for engaging with an operating gear of the rotating cam; A locking head installed on one side of the locking cam; A driving motor fixed to the case and provided with a worm shaft for engaging with an operating gear of the rotating cam; And a control board fixedly mounted on the case, on which a control circuit for controlling the operation of the drive motor is mounted.

The second locking means includes a rotation link body rotatably installed in the case and connected to the unlocking key assembly, and having a release lever on an outer periphery thereof; An unlocking key operation switch fixed to the case and operated by a release lever of the rotary connector; A lock release switch fixed to the case and operated by a detent projection provided on the rear surface of the rotation cam to stop the rotation of the drive motor and the rotation cam at the lock release position; And a lock stop switch fixed to the case and operated by a detent projection provided on the rear surface of the rotation cam to stop the rotation of the drive motor and the rotation cam at the lock position.

And the second locking means is provided to the case so as to be movable in the right and left direction and has a protruding and retracting protrusion at a tip end thereof; And a door closing confirmation switch installed in the case and operated by the door closing sensor.

The double locking device for a fire door according to the present invention not only improves opening and closing operability of a fire door but also prevents dust from entering the room and prevents deterioration of indoor air-cooling efficiency, It can contribute greatly to profit creation.

In addition, the double locking device for a fire door of the present invention can minimize the clearance between the fire door and the door frame by means of the first locking means and the second locking means using electricity, so that the fire door can be closed completely close to the door frame It is possible to maximize the binding force of the fire door and to prevent the intrusion of flames, toxic gas, and strong wind accompanied with heat at high temperature from the outside of the shelter during the fire, into the inside of the shelter, thereby minimizing personal injury.

In addition, in the double locking device for a fire door of the present invention, a second locking means is constituted by a driving motor, a rotation cam, a locking cam and the like so that the first locking means and the second locking means are automatically locked when the fire door is closed, It is possible to easily release the locking state of the first locking means and the second locking means through the driving motor even when the fire door is opened so that the convenience and the merchantability of the product can be greatly improved.

1 is an exploded perspective view of an embodiment of the present invention;
2 is a perspective view of the embodiment
3 is an internal perspective view
Fig. 4 is an internal front view of the locked state of the embodiment
Fig. 5 is a front view of the recessed portion in the second locking means unlocked state of this embodiment
6 is a perspective view of a double locking device for a fire door according to the prior art;
7A and 7B are internal front views showing the operation of the double locking device for a fire door according to the prior art.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is an exploded perspective view of one embodiment of the present invention. Fig. 2 is a perspective view of the same embodiment. Fig. 3 is an internal perspective view of the same embodiment. Fig. An inner front view is shown in Fig. 5, and Fig. 5 is a front view of the recessed portion in the second locking means unlocked state of this embodiment.

1 to 5, the double locking apparatus for a fire door according to the present invention includes a case 100 installed inside a fire door; A first locking means 200 provided on the upper portion of the interior of the case 100; And a second locking unit 300 provided under the inside of the case 100.

In the double locking device for a fire door according to the present invention, the case 100 has a front surface and a side surface respectively opened, a sealing cover 110 is installed on the opened front, and a sealing plate 120 is installed on one side do.

The sealing plate 120 is provided with a first locking head access hole 121 and a door opening and closing miter projection access hole 173 at an upper portion thereof and a second locking head access hole 122 at a lower portion thereof.

The first locking unit 200 provided in the upper portion of the case 100 includes a sliding shaft 210 installed to be movable in the lateral direction of the case 100; A locking head 220 installed at the tip of the sliding shaft 210; A first spring 231 and a second spring 232 installed at a circumferential front portion and a circumferential rear portion of the sliding shaft 210 to elastically support the sliding shaft 210 in the left and right directions; A fixing member 240 installed at the center of the outer periphery of the sliding shaft 210; A stopper (250) fixed to the case (100) and restricting the movement of the fixing piece (240) and the sliding shaft (210); And an operation cam 260 provided at an upper portion of the case 100 so as to be rotatable and provided with an operation protrusion 261 for contacting the fixing piece 240. The operation cam 260 is connected to the handle of the front face of the fire door.

The second locking means 300 provided in the lower portion of the case 100 includes a rotation cam 310 rotatably installed in the case 100 and having an operating gear 311 formed on the outer circumference thereof; A locking cam 320 provided on the case 100 so as to be freely rotatable and having a connecting gear 321 formed on the outer periphery thereof for engaging with the operating gear 311 of the rotating cam 310; A locking head 330 installed on one side of the locking cam 320; A driving motor 340 fixed to the case 100 and having a worm shaft 341 engaged with the operating gear 311 of the rotating cam 310; And a control board 350 fixedly mounted on the case 100, on which a control circuit for controlling the operation of the drive motor 340 is mounted.

The second locking unit 300 includes a rotation connection body 360 rotatably installed in the case 100 and connected to the unlocking key assembly and having a release lever 361 on the outer periphery thereof; An unlocking key operation switch 410 fixed to the case 100 and operated by a release lever 361 of the rotary connector 360; A lock that is fixed to the case 100 and is actuated by a detent projection 312 provided on the rear surface of the rotation cam 310 to stop rotation of the drive motor 340 and the rotation cam 310 at the unlock position A release switch 420; A lock stopper 312 fixed to the case 100 and operated by a detent protrusion 312 provided on the rear surface of the rotation cam 310 to stop the rotation of the drive motor 340 and the rotation cam 310 at the lock position, Switch 430;

In addition, the second locking means 300 includes a door closing detection rod 370 which is installed in the case 100 so as to be movable in the left and right direction and has a protruding / retreating protrusion 371 at the front end thereof; And a door closing confirmation switch (440) installed in the case (100) and operated by the door closing detection rod (370).

In the double locking apparatus for a fire door according to the present invention, the driving motor 340, the unlocking key operation switch 410, the unlocking stop switch 420, the lock stopping switch 430 and the door closing confirmation switch 440 are controlled It goes without saying that it is connected to the control circuit of the substrate 350.

The double locking apparatus for a fire door according to the present invention is configured such that the locking head 330 of the second locking means 300 is not protruded outside the sealing plate 120.

When the fire door is closed after power is connected to the control board 350, the protrusion 371 protruding outward from the sealing plate 120 is pushed toward the case 100 so that the entire door close sensor 370 And moves to the inside of the case 100, and the rear end of the door close detection rod 370 operates the door close confirmation switch 440.

When the viscous confirmation switch 440 is operated, the control circuit of the control board 350 operates the driving motor 340 of the second locking means 300 to rotate in one direction.

When the worm shaft 341 of the driving motor 340 rotates in one direction, the rotation cam 310 engaged with the worm shaft rotates in the counterclockwise direction in FIG. 4, and the driving gear 311 of the rotation cam 310 rotates in the counter- The locking cam 320 engaged with the locking cam 320 rotates clockwise so that the locking head 330 installed on one side of the locking cam 320 protrudes outward of the closing plate 120 to be locked.

The operation of the drive motor 340, the rotation cam 310 and the locking cam 320 is performed until the rotation cam 310 operates the lock stop switch 430 in the lock operation process.

That is, when the detent protrusion 312 provided on the rear surface of the rotation cam 310 operates the lock-off switch 430, the control circuit of the control board 350 stops the driving motor 340, The rotation of the rotation cam 310 and the rotation of the locking cam 320 is stopped.

On the other hand, when the lock door is to be opened through the first locking means 200 and the second locking means 300, the lock key is inserted into the unlocking key assembly (not shown) from the outside of the fire door, The rotation link 360 connected to the unlocking key assembly rotates in one direction and the release lever 361 provided on the outer periphery of the rotation link 360 operates the unlocking key operation switch 410 .

When the unlocking key operation switch 410 is operated, the control circuit of the control board 350 rotates the driving motor 340 of the second locking unit 300 in the direction opposite to the lock rotation direction, When the worm shaft 341 of the worm 340 rotates in the direction opposite to the lock rotation direction, the rotation cam 310 engaged with the worm shaft rotates in the clockwise direction in FIG. The engaging locking cam 320 is rotated in the counterclockwise direction so that the locking head 330 protruding outward from the sealing plate 120 is housed inside the case 100.

The operation of the drive motor 340, the rotation cam 310 and the locking cam 320 is performed until the rotation cam 310 operates the unlocking stop switch 420 in the unlocking operation.

That is, when the detent projection 312 provided on the rear surface of the rotation cam 320 operates the unlocking stop switch 430, the control circuit of the control board 350 stops the driving motor 340, 340 are stopped, the rotation of the rotation cam 310 and the rotation of the locking cam 320 is stopped.

After releasing the locking state of the second locking means 300, the knob is rotated in one direction to release the locking state of the first locking means 200 and open the fire door.

That is, when the handle is rotated in one direction after releasing the locked state of the second locking means 300, the operating cam 260 of the first locking means 200 connected to the handle is rotated in one direction, and the operating cam 260 The locking protrusion 261 of the locking protrusion 261 pushes the fixing piece 240 provided on the slide shaft 210 to one side so that the slide shaft 210 is moved to one side and the locking head 220 is moved to the inside of the case 100 And the locked state of the first locking means 200 is released.

It is possible to open the fire door after releasing all the locked states of the second locking means 300 and the first locking means 200.

When the fire door is closed in a state where the fire door is opened, the slide shaft 210 of the first locking means 200 elastically supported by the first spring 231 and the second spring 232 is moved toward the sealing plate 120 And the locking head 220 is protruded to the outside of the sealing plate 120 to lock the first locking means 200.

The protrusion 371 protruding outward from the sealing plate 120 is pushed toward the case 100 so that the door closing sensor 370 operates the door closing confirmation switch 440, The driving motor 340 of the second locking means 300 is actuated by the control circuit of the locking plate 330 and the rotating cam 310 and the locking cam 320 are operated and the locking head 330 is moved outwardly of the closing plate 120 So that the second locking means 300 is locked.

The double lock apparatus for a fire door according to the present invention can double lock the fire door through the first locking means 200 and the second locking means 300 so that the opening and closing operability of the fire door can be improved, It is possible to improve the reliability of the product and to maximize the binding force so that the fire door can be closed completely close to the door frame so as to minimize the clearance between the fire door and the door frame. It is possible to prevent the intrusion of flames, toxic gas, and strong wind accompanied by heat at high temperatures into the inside of the shelter, thereby minimizing the damage to persons.

In addition, in the double locking device for a fire door of the present invention, when the fire door is closed, the driving motor or the like automatically operates to lock the second locking means, and even when the fire door is opened, State can be released, and convenience and merchandise of the product can be greatly improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. .

100: Case
200: first locking means
210: Sliding shaft
220: locking head
231: first spring
232: second spring
240: Fixed piece
250: Stopper
260: Operation cam
261: Operation projection
300: second locking means
310: rotation cam
311: Working gear
312: detent projection
320: Locking cam
321: Connecting gear
330: locking head
340:
341: Wormworm motor shaft
350: Control board
360: rotating connector
361: Release lever
370: Door closing sensor
371: protruding protuberance
410: Unlocking key operation switch
420: Unlocking switch
430: Lock stop switch
440: Door Closing Confirmation Switch

Claims (3)

A case 100 installed inside the fire door; A first locking means 200 provided on the upper portion of the interior of the case 100; And a second locking means (300) provided under the inside of the case (100)
The first locking unit 200 provided in the upper portion of the case 100 includes a sliding shaft 210 installed to be movable in the lateral direction of the case 100; A locking head 220 installed at the tip of the sliding shaft 210; A first spring 231 and a second spring 232 installed at a circumferential front portion and a circumferential rear portion of the sliding shaft 210 to elastically support the sliding shaft 210 in the left and right directions; A fixing member 240 installed at the center of the outer periphery of the sliding shaft 210; A stopper (250) fixed to the case (100) and restricting the movement of the fixing piece (240) and the sliding shaft (210); And an operation cam 260 provided on the case 100 so as to be freely rotatable and having an operation protrusion 261 at an upper portion thereof to be in contact with the fixing piece 240 and connected to a handle of the front face of the fire door,
The second locking means 300 provided in the lower portion of the case 100 includes a rotation cam 310 rotatably installed in the case 100 and having an operating gear 311 formed on the outer circumference thereof; A locking cam 320 provided on the case 100 so as to be freely rotatable and having a connecting gear 321 formed on the outer periphery thereof for engaging with the operating gear 311 of the rotating cam 310; A locking head 330 installed on one side of the locking cam 320; A driving motor 340 fixed to the case 100 and having a worm shaft 341 engaged with the operating gear 311 of the rotating cam 310; And a control board (350) fixed to the case (100) and on which a control circuit for controlling the operation of the drive motor (340) is mounted.
[3] The apparatus of claim 1, wherein the second locking unit 300 comprises: a rotating connector 360 rotatably installed in the case 100 and connected to the unlocking key assembly and having a release lever 361 on the outer periphery; An unlocking key operation switch 410 fixed to the case 100 and operated by a release lever 361 of the rotary connector 360; A lock that is fixed to the case 100 and is actuated by a detent projection 312 provided on the rear surface of the rotation cam 310 to stop rotation of the drive motor 340 and the rotation cam 310 at the unlock position A release switch 420; A lock stopper 312 fixed to the case 100 and operated by a detent protrusion 312 provided on the rear surface of the rotation cam 310 to stop the rotation of the drive motor 340 and the rotation cam 310 at the lock position, Further comprising a switch (430).
[3] The apparatus of claim 2, wherein the second locking means (300) comprises: a door closing detection rod (370) mounted to the case (100) so as to be movable in the left and right direction and provided with a protrusion / And a door closing confirmation switch (440) installed in the case (100) and operated by the door closing detection rod (370).

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