KR20100138217A

KR20100138217A - Fixing device for openning state of the door

Info

Publication number: KR20100138217A
Application number: KR1020090056641A
Authority: KR
Inventors: 신만우
Original assignee: 주식회사 씨큐넥스
Priority date: 2009-06-24
Filing date: 2009-06-24
Publication date: 2010-12-31

Abstract

The present invention relates to a fire door opening fixing device, and more particularly, the operation of the rotation means connected to the fire door by the locking device is usually limited, it is possible to maintain a fixed state with the fire door open without any auxiliary device , When the emergency switch is pressed in the event of a fire, the locking device is released so that the fire door can be automatically closed as the rotation means rotates.

The present invention provides a case connected to the door closer by a link member, and a rotation means installed inside the case to limit the opening and closing operation of the fire door, and connected to the rotation means to fix the rotation means. It characterized in that it comprises a fixing means, a locking device for controlling the movement of the fixing means and a driving means for operating the locking device.

Description

Fixing device for openning state of the door}

In general, when a fire breaks out in a building and spreads to another floor, the first thing to do is smoke, which makes it difficult for people to breathe and interferes with visibility, and is embarrassed by the smoke. There are many problems in evacuating the fire.

In the case of a fire door installed in a building, a horseshoe-shaped fastener installed in the lower part of the fire door is lifted to fix the fire door in order to block the smoke when the smoke moves upstairs, and then manually open the door. Closed to prevent smoke from entering. However, when the fire door is closed to block the smoke after the fire has occurred, a large amount of smoke has already flowed in. This is because it is determined based on the smoke to determine whether the fire has occurred. . Therefore, there was a problem that the smoke is not properly blocked by the fire door during the actual fire.

In order to solve such a problem, a number of devices for automatically closing fire doors in recent years have been applied. Among them, Korean Utility Model Publication No. 20-0410354 discloses a fire door keeping and closing device.

The main structure of the fire door opening and closing device is a base panel, a cover formed with a through hole, a smoke detector installed to detect smoke on one side of the base panel, and a door installed in the fire door by a signal applied from the smoke detector. An operating part installed on the base panel to control the closer, a rotating part installed between the length adjusting arm of the door closer and the operating part to open and close the fire door, a power detector supplying power required by the smoke detector and the operating part, It is characterized by consisting of a smoke detector connected to the smoke detector.

However, the above-described configuration can only open and close the fire door by the smoke, so the fire door can not be closed in the event of an emergency other than a fire occurrence, and in the case of a heat insulating material such as glass fiber, which has recently been developed, there is almost no smoke at the time of fire. Smoke detector does not work because it does not occur, there was a problem that the fire door can not be closed in time.

In addition, since the conventional configuration as described above requires a separate smoke detector, the configuration is complicated, often cause malfunctions, and once the fire door is open, it is difficult for the user to close and open the fire door as needed. There was also a problem.

The present invention has been made to solve the above problems, the object of the present invention is to control the operation of the fire door automatically in the event of a fire and at the same time can be fixed in the open state without the usual auxiliary devices. It is to provide an automatic opening and closing device for fire doors that can prevent the occurrence of large accidents in the event of a fire and improve the convenience of fire door operation.

In addition, the present invention can not only accurately and effectively control the fixed and closed operation of the fire door with a simple configuration, but also to release the fixed open state of the fire door when a certain force is applied by the user's selection even when the fire door is open and fixed. It is another object to provide an automatic opening and closing device for a fire door.

The present invention for achieving the above objects,

A case connected to the door closer by the link member, a rotation means installed inside the case to limit the opening and closing operation of the fire door, and a fixing means connected to the rotation means to fix the rotation means; It characterized in that it comprises a locking device for controlling the movement of the fixing means and a driving means for operating the locking device.

At this time, the rotating means is configured to include a rotating cam connected to the fixing means, a rotating shaft connected to the lower portion of the rotating cam and the first and second gears coupled between the rotating cam and the rotating shaft. It features.

In addition, one side of the rotating cam is characterized in that the protrusion formed with a coupling groove is coupled to the fixing means is formed.

On the other hand, the fixing means is a body pin, a locking pin having a wheel coupled to the front surface of the body portion and installed to be connected to the pivot member, the locking spring is installed between the body and the locking pin and the rear of the body portion It is characterized in that it comprises a fixed plate coupled to the fixed spring spring.

At this time, the body portion is formed with a through hole through which the locking pin and the locking spring is coupled, the bottom surface of the body portion is formed with a guide groove for moving the fixing means before and after, the locking portion is provided on one side of the body portion Characterized in that the insertion groove is formed to be fitted.

In addition, the insertion groove is characterized by consisting of a guide portion for guiding the locking device, and a tapered portion formed inside the guide portion.

The locking device includes a coupling part inserted into and coupled to the insertion groove, and a support part for supporting the body of the fixing means is protruded, and a connection groove connected to the driving means is formed at the lower part of the locking device. .

In addition, the drive means is characterized in that it comprises a drive motor for operating the lock device, a drive gear installed in the drive motor and an interlocking gear connected between the drive gear and the lock device.

At this time, one side of the fixing means is characterized in that the first and second limit switches for controlling the operation of the drive motor is installed.

On the other hand, the case is characterized in that the control unit for controlling the operation of the drive means is installed inside.

In addition, the control unit is characterized in that it comprises a printed circuit board for operating the drive means by receiving a signal from the outside, and a heat sensor and a smoke sensor installed in addition to the printed circuit board.

According to the present invention, it is possible to automatically control the opening and closing operation of the fire door without any auxiliary device, and can control the opening and closing of the fire door even outside the building such as the guard room in the event of a fire, thereby preventing the occurrence of a large accident in advance. Have

In addition, the present invention can not only accurately and effectively control the fixed and closed operation of the fire door with a simple configuration, but also to release the fixed open state of the fire door when a certain force is applied by the user's selection even when the fire door is open and fixed. Has an additional effect.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the fire door opening fixing device according to the present invention.

1 is a front view showing a fire door having a fire door opening fixing device according to the present invention, FIG. 2 is a plan view showing a fire door opening fixing device according to the present invention, and FIG. 3 is an exploded view showing a rotation means of the present invention shown in FIG. Figure 4 is an exploded perspective view showing a fixing means of the present invention shown in Figure 2, Figure 5 (a), (b) is a perspective view and a bottom perspective view showing a locking device and a driving means of the present invention shown in Figure 2 And, Figure 6 (a) ~ (c) is a state diagram showing the operation of the fire door opening fixing device according to the invention.

The present invention is usually limited to the operation of the rotation means 300 is connected to the fire door 30 by the locking device 500, it is possible to maintain a fixed state while the fire door 30 is open without any auxiliary device When the fire occurs, pressing the emergency switch (not shown) when the locking device 500 is released to rotate the rotation means 300 relates to the fire door opening fixing device 100 to automatically close the fire door (30), The configuration is largely configured to include a case 200, the rotating means 300, the fixing means 400, the locking device 500 and the driving means 600.

In more detail, first, the case 200 is connected to the door closer 40 by the link member 20 that opens and closes the fire door 30 as shown in FIG. 1, and the inside of the case 200. Is divided into a plurality of spaces in which the rotation means 300, the fixing means 400, the locking device 500, and the driving means 600 are installed. That is, the case 200 is connected to the door closer 40 by the link member 20 and installed therein, which is provided with a rotational step 300, a fixing means 400, a locking device 500, and a driving means ( 600) to protect parts such as external shock.

Next, the rotation means 300 is installed inside the case 200 to serve to limit the opening and closing operation of the fire door (30). That is, the rotation means 300 is installed in connection with the link member 20 which serves to open and close the fire door 30 to prevent the rotation of the link member 20 can be fixed in the open state of the fire door (30). Or to allow the link member 20 to rotate freely so that the fire door 30 can be automatically closed by the operation of the door closer 40, and the configuration is again the rotation cam 310 and the rotation shaft ( 320 and first and second gears 330 and 340.

In more detail, the pivoting cam 310 is installed between the fixing means 400 and the link member 20 to limit the rotation of the link member 20 so that the fire door 30 is fixed or opened in an open state. It serves to adjust to enable, one side of the rotating cam 310 is formed with a projection 312 is formed with a coupling groove 314 is coupled to the fixing means (400).

As will be described later, in the state in which the fixing means 400 is accommodated in the coupling groove 314 formed in the pivoting cam 310, the pivoting of the pivoting cam 310 is limited, thereby preventing the link member 20 from rotating. Is fixed in the open state, when the fixing means 400 is separated from the coupling groove 314 formed in the rotation cam 310, the rotation cam 310 is free to rotate to the rotation of the link member 20. Opening and closing of the fire door 30 is made freely.

In addition, as shown in FIG. 3, the pivot shaft 320 is connected to the lower portion of the pivot cam 310, and the pivot shaft 320 is coupled to the shaft of the link member 20 to link the member 20. ) To transmit the rotational force of the rotating cam 310 or the fixing force of the rotating cam 310 to the link member 20.

That is, in the state in which the fixing means 400 is accommodated in the coupling groove 314 formed in the rotation cam 310, the rotation shaft 320 is also fixed, so that the link member 20 connected to the rotation shaft 320 is also fixed to the fire door ( 30 is maintained in a fixed state, and when the fixing means 400 is separated from the coupling groove 314, the fixing of the link member 20 is released and the rotational force of the link member 20 is applied to the rotation shaft 320. It is transmitted to the rotating cam 310 by the rotating cam 310 is free to rotate and the fire door 30 is free to open and close.

Next, first and second gears 330 and 340 are inserted and installed between the rotation cam 310 and the rotation shaft 320, and the first and second gears 330 and 340 are rotation cams. It serves to strengthen and at the same time transmit a fixed force and rotational force between the 310 and the rotating shaft (320). That is, the first gear 330 is inserted into the rotation cam 310 from the bottom of the rotation cam 310, the tooth is formed only on the lower surface of the first gear (330). In addition, the second gear 340 is engaged with the first gear 330 so as to be fixed to the upper portion of the rotation shaft 320, the rotation of the first gear 330 and the second gear 340 by the engagement. The cam 310 and the rotation shaft 320 serves to interlock and move together.

In addition, a washer 360 is inserted between the rotating cam 310 and the rotating shaft 320 to reduce friction by forming a predetermined gap between the rotating cam 310 and the rotating shaft 320. It may be installed.

On the other hand, the fixing means 400 is connected to the above-described rotation means 300 is installed to serve to fix the rotation means 300, the configuration of the body portion 410, the unlocking pin 420, the lock It is configured to include a spring 430 and the fixing plate 440.

In more detail, the body portion 410 serves as a case of the fixing means 400, the lower side of the body portion 410 is formed with an insertion groove 416 to which the locking device 500 is fitted. And, the bottom of the body portion 410 is formed with a guide groove 414 for allowing the fixing means 400 to move back and forth along the guide portion (not shown) protruding from the case 200, In the upper portion of the body portion 410, a through hole 412 into which the unlocking pin 420 and the unlocking spring 430 are inserted is formed.

Next, the unlocking pin 420 is inserted into the through hole 412 of the body portion 410 is installed to be connected to the rotation means 300, one end of the unlocking pin 420 of the rotation means 300 The wheel 422 accommodated in the coupling groove 314 formed in the rotation cam 310 is provided. At this time, the other end of the unlocking pin 420 is coupled to the release spring 430, the release spring 430 serves to move the fixing means 400 back and forth by elasticity.

In addition, the fixing plate 440 is coupled to the rear end of the body portion 410 serves to fix the release spring 430 inside the body portion 410.

That is, the fixing means 400 serves to fix or release the rotation means 300 while moving back and forth by the operation of the locking device 500 to be described later, the locking device 500 is the body portion In the state coupled to the insertion groove 416 of the 410, the fixing means 400 is positioned as forward as possible, the wheel 422 provided at one end of the release pin 420 is formed on the rotation cam 310 It is accommodated in the coupling groove 314 to fix the rotation member 300 so as not to rotate, the unlocking spring 430 coupled to the other end of the unlocking pin 420 is as compressed as possible the fire door 30 is open Will remain fixed.

In addition, when the locking device 500 is released from the insertion groove 416 of the body portion 410, the fixing means 400 is pushed backward by the elasticity of the locking spring 430 is provided on the locking pin 420 When the wheel 422 is separated from the coupling groove 314 formed in the rotation cam 310 and the rotation means 300 is free to rotate, the fire door 30 is automatically operated by the operation of the link member 20. It will be closed.

At this time, the upper and lower portions of the fixing means 400 to prevent the fixing means 400 is separated from the outside and at the same time the first and second guide members for guiding the front and rear movement of the fixing means 400 ( 450 and 460 may be additionally installed.

In addition, first and second limit switches 470 and 480 may be installed between the second guide member 460 and the case 200. The first and second limit switches 470 and 480 may be provided. ) Serves to control the operation of the driving motor 610 of the driving means 600 to be described later. In more detail, the pressing portion 418 protrudes from the opposite side of the body portion 410 on which the insertion groove 416 is formed, and the pressing portion 418 moves forward and backward of the fixing means 400. By operating the first and second limit switch 470, 480, the first limit switch 470 is installed in the front drive further in the state in which the fixing means 400 is maximally advanced The motor 610 does not operate, and the second limit switch 480 is installed at the rear to serve to prevent the driving motor 610 from operating any more in a state in which the fixing means 400 is maximally reversed. will be.

Next, the locking device 500 is to move by the operation of the driving means 600 to be described later to limit the movement of the fixing means 400, as described above the locking device 500 is fixed means ( When fitted into the insertion groove 416 formed in the body portion 410 of the 400, the movement of the fixing means 400 is limited, and when the locking device 500 is released from the insertion groove 416 fixing means ( 400) will retreat backwards.

As shown in (a) and (b) of FIG. 5, the locking device 500 includes a coupling part 510 and a support part 520 protruding toward the fixing means 400. Is fitted to the insertion groove 416 of the fixing means 400 to fix the fixing means 400, the support portion 520 of the fixing means 400 by supporting the rear side of the fixing means 400 By the elasticity of the locking spring 430 installed therein is to serve to support the push back. In addition, a coupling groove 530 is formed at the lower side of the opposite side from which the coupling part 510 and the support part 520 protrude, and the connection groove 530 connects the locking device 500 to the driving means 600. To serve to be coupled by a fastening means, such as bolts.

At this time, the coupling portion 510 to be fitted into the insertion groove 416 of the fixing means 400 is formed to protrude in a triangular shape to form a taper on both sides, the insertion groove 416 of the fixing means 400 The guide part 416a and the taper part 416b are formed to correspond to the shape of the coupling part 510, because the coupling part 510 of the locking device 500 is inserted into the fixing means 400. When the fitting means 400 is coupled to the groove 416 is to be able to move forward naturally. That is, in order to fix the fire door 30 in a state in which the locking device 500 is separated from the fixing means 400 and the fire door 30 is freely openable and closed, the driving device 600 is operated to move the locking device 500. The coupling part 510 of the locking device 500 is inserted into the insertion groove 416 formed in the fixing means 400. At this time, since the fixing means 400 is pushed backward, the coupling part 510 and The position of the insertion groove 416 is not matched. However, since the coupling part 510 has a sharp triangular front end portion, the locking device 500 moves and presses the guide part 416 a of the insertion groove 416, so that the fixing spring 400 is compressed. ) Starts to move forward, and when the movement of the fixing means 400 is completed, the coupling part 510 is brought into close contact with the insertion groove 416 formed of the guide part 416 a and the taper part 416 b. 400) can be fixed more securely.

On the other hand, the driving means 600 serves to move the locking device 500 in order to be able to fix the fixing means 400 and the rotation means 300, the configuration of the drive motor 610 and the driving large It comprises a gear 620 and the interlocking gear 630.

In more detail, the drive motor 610 is to generate power for moving the locking device 500, as will be described later, the control unit 700 may operate the drive motor 610 by detecting a fire. In addition, when a fire occurs, the drive motor 610 may be operated by sending a signal by detecting a fire in the outside, that is, a guard room or a home.

In addition, the drive gear 620 is installed in the drive motor 610 to serve to transfer the power of the drive motor 610 to the interlocking gear 630, the interlocking gear 630 is the drive gear 620. It is connected between the connecting groove 530 of the locking device 500 and serves to move the locking device 500 by using the power transmitted from the drive gear 620.

On the other hand, the inner side of the case 200 may be provided with a control unit 700 for controlling the operation of the driving means 600 by controlling the operation of the drive motor 610, the control unit 700 is a printed circuit It includes a substrate (PCB) 710, the thermal sensor 720 and the smoke detection sensor 730 is additionally installed on the printed circuit board 710. In more detail, the printed circuit board 710 is provided with a receiving unit 740 for recognizing an external signal and generates a signal in a guard room or home that detects it when a fire or emergency occurs. By receiving the signal to drive the drive motor 610 is a fire door 30 that is fixed in the open state is to be automatically closed. In addition, when the heat detection sensor 720 and the smoke detection sensor 730 is additionally installed on the printed circuit board 710, when it is not confirmed from the outside in the event of a fire, the heat detection sensor 720 or the smoke detection sensor 730. The fire door 30 may be automatically closed by detecting the heat or the smoke at) to automatically operate the driving motor 610.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation example of the fire door opening fixing device 100 according to the present invention.

In general, the fire door 30 is usually open for the purpose of ventilation and ventilation in many cases, the fire door opening fixing device 100 according to the present invention is installed on the door frame 10 of the fire door 30 fire door 30 It is configured to fix the fire door 30 without installing a separate fixing means.

In more detail, when the fire door 30 is fixed in an open state, the fire door opening fixing device 100 according to the present invention is in a state as shown in FIG. 6A, which rotates the fire door 30. By fixing the rotation means 300 is connected to the link member 20 for the purpose of restraining the rotation of the link member 20 to secure the fire door (30).

That is, the rotation cam 310 of the rotation means 300 is fixed by the wheel 422 provided on the release pin 420 of the fixing means 400, the fixing means 400 is inserted into the insertion groove 416 Locked by the locking device 500 is fitted to the fixing means 400 and the rotating means 300 is fixed, so the link member 20 is installed between the rotating means 300 and the fire door 30 also fixed state Will be the fire door 30 is fixed in the open state.

In this case, the user may close the door as necessary, so when the user pulls the fire door 30 in an open state by a predetermined force or more, the fire door 30 may be closed. Referring to FIG. This will be described in detail.

Even when the fire door 30 is fixed in an open state, the fire door 30 is in a state of being continuously closed by the operation of the door closer 40, in which the user is required to close the fire door 30 in a predetermined state. When the force is applied to the coupling means of the rotating cam 310, the wheel 422 provided on the release pin 420 of the fixing means 400 is formed to increase the force to rotate the rotating means 300 is formed in a circular shape Moving along 314, the unlocking pin 420 is pushed backward while compressing the unlocking spring 430. At this time, when the force that the user applies the fire door 30 is a predetermined force or more, the wheel 422 reaches the top end of the coupling groove 314, that is, the protrusion 312 formed with the coupling groove 314, the wheel as described above When the 422 is separated from the coupling groove 314, the force acts in the direction in which the fire door 30 is automatically closed by the operation of the door closer 40, so that the fire door 30 is closed while the rotation means 300 rotates. will be. In addition, when the fire door 30 is closed as described above, as the wheel 422 descends along the outside of the protrusion 312, the rotational force is added to the rotation means 300 so that the force of the fire door 30 is naturally strengthened.

Meanwhile, as shown in FIG. 6A, when an emergency situation such as a fire occurs in a fixed state with the fire door 30 open, the thermal sensor 720 and the smoke sensor provided in the control unit 700 are provided. In operation 730, the driving motor 610 is detected, or when an emergency signal button (not shown) is pressed in a guard room or home that has confirmed an emergency situation such as a fire, the reception unit 740 provided in the control unit 700 does this. The driving of the driving motor 610 is detected.

Accordingly, the driving gear 620 built in the driving motor 610 and the interlocking gear 630 connected to the driving gear 620 are rotated while the locking device 500 coupled with the interlocking gear 630 is rotated. Out of the insertion groove 416 of the fixing means 400, the fixing means 400 is pushed back by the elasticity of the unlocking spring 430 installed in the body portion 410 is rotated means 300 Since the wheels 422 provided on the unlocking pins 420, which have been fixed thereto, come out of the coupling groove 314 of the rotation cam 310, the rotation means 300 is free to rotate, so that the fire door 30 ) Is to be closed by the operation of the door closer (40).

At this time, when the wheel 422 provided in the fixing means 400 is released from the coupling groove 314 provided in the rotating cam 310 and the rotating means 300 can freely rotate, the fixing means 400. The pressing part 418 protruding from the body 410 of the body 410 operates the second limit switch 480, and the operation of the driving motor 610 is stopped by the operation of the second limit switch 480.

Next, when the fire door 30 is closed, the internal configuration of the fire door opening fixing device 100 according to the present invention is positioned as shown in Fig. 6 (c), the user opens the fire door 30 is closed When the operation is reversed to the above description, the internal configuration of the fire door opening fixing device 100 is in a state as shown in FIG. 6 (a), and the fire door 30 is fixed in an open state.

That is, when the user opens the fire door 30 is closed, the rotation means 300 is rotated in the opposite direction as when the fire door 30 is closed, the drive motor 610 is operated to lock the locking device 400 It is gradually pushed into the insertion groove 416 formed in the. At this time, the coupling portion 510 of the locking device 500 is formed to form a taper to press the guide portion 416a of the insertion groove 416 forward in the process of being inserted into the insertion groove 416 fixing means The body portion 410 of the 400 is gradually moved forward while compressing the internal locking spring 430. In this process, the wheel 422 provided on the releasing pin 420 of the fixing means 400 is rotated by the pivoting means 300 and rides over the protrusion 312 formed in the pivoting cam 310. 314, the rotation of the rotation cam 310 by the wheel 422 is limited, so that both the operation of the rotation means 300 and the link member 20 is limited, so that the fire door 30 is no longer opened It is fixed in a state that does not close or close.

At this time, when the fire door 30 is fixed in the open state, as shown in Figure 6 (a), the pressing portion 418 protruding from the body portion 410 of the fixing means 400 is the first limit switch 470 The operation of the driving motor 610 is stopped by the operation of the first limit switch 470.

Therefore, the fire door opening fixing device 100 according to the present invention as described above can automatically control the opening and closing operation of the fire door 30 without any auxiliary device, the fire door 30 in the outside of the building, such as the guard room in the event of a fire Since the opening and closing can be adjusted, there are various advantages such as preventing the occurrence of a large accident in advance.

Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

The present invention relates to a fire door opening fixing device, and more particularly, the operation of the rotation means connected to the fire door by the locking device is usually limited, so that the fire door can remain fixed without any auxiliary device. And, when the fire occurs when the emergency switch is pressed, the locking device is released so that the fire door can be automatically closed as the rotation means rotates.

1 is a front view showing a fire door installed with a fire door opening fixing device according to the present invention.

Figure 2 is a plan view showing a fire door opening fixing device according to the present invention.

Figure 3 is an exploded perspective view showing a rotation means of the present invention shown in FIG.

Figure 4 is an exploded perspective view showing a fixing means of the present invention shown in FIG.

Figure 5 (a), (b) is a perspective view and a lower perspective view of the locking device and the driving means of the present invention shown in FIG.

Figure 6 (a) ~ (c) is a state diagram showing the operation of the fire door opening fixing device according to the invention.

Explanation of symbols on the main parts of the drawings

10: door frame 20: link member

30: fire door 40: door closer

100: fire door opening fixing device 200: case

300: rotation means 310: rotation cam

312: protrusion 314: coupling groove

320: rotating shaft 330: first gear

340: second gear 360: washer

400: fixing means 410: body portion

412: through hole 414: guide groove

416: insertion groove 416a: guide

416b: Taper portion 418: Pressing portion

420: anchor pin 422: wheel

430: offshore spring 440: fixed plate

450: first guide member 460: second guide member

470: first limit switch 480: second limit switch

500: locking device 510: coupling part

520: support 530: connecting groove

600: drive means 610: drive motor

620: drive gear 630: interlocking gear

700: control unit 710: printed circuit board

720: heat detection sensor 730: smoke detection sensor

740: receiver

Claims

A case connected to the door closer by a link member;

A rotation means installed inside the case to limit the opening and closing operations of the fire door;

A fixing means connected to the rotating means to fix the rotating means;

Locking device for controlling the movement of the fixing means and

Fire door opening fixing device comprising a drive means for operating the locking device.

The method of claim 1,

The rotating means includes a rotating cam connected to the fixing means, a rotating shaft connected to the lower portion of the rotating cam, and first and second gears coupled between the rotating cam and the rotating shaft. Fire door opening lock.

3. The method of claim 2,

One side of the rotating cam is a fire door opening fixing device, characterized in that the protrusion formed with the engaging groove is coupled to the fixing means is formed.

The method of claim 1,

The fixing means is coupled to the front of the body portion, the locking pin having a wheel coupled to the front of the body and installed to the rotation member, the locking spring is installed between the body and the locking pin and coupled to the rear of the body portion The fire door opening fixing device characterized in that it comprises a fixing plate for fixing the locking spring.

The method of claim 4, wherein

The body part is formed with a through hole through which the locking pin and the locking spring are coupled, and a guide groove is formed on the bottom of the body to allow the fixing means to move forward and backward, and the locking device is fitted to one side of the body. Fire door opening fixing device characterized in that the insertion groove is formed.

The method of claim 5,

The insertion groove is a fire door opening fixing device, characterized in that consisting of a guide portion for guiding the locking device, and a tapered portion formed inside the guide portion.

The method of claim 6,

The lock device includes a coupling part inserted into and coupled to the insertion groove, a support part for supporting the body part of the fixing means is formed to protrude, and a lower portion of the locking device is provided with a connection groove connected to the driving means. Fixture.

The method of claim 1,

And the driving means includes a driving motor for operating the locking device, a driving gear built in the driving motor, and an interlocking gear connected to the driving gear and the locking device.

The method of claim 8,

One side of the fixing means is a fire door opening fixing device, characterized in that the first and second limit switches for controlling the operation of the drive motor is installed.

The method according to any one of claims 1 to 9,

A fire door opening fixing device, characterized in that a control unit for controlling the operation of the drive means is installed inside the case.

The method of claim 10,

The control unit includes a printed circuit board for receiving a signal from the outside to operate the driving means, and a thermal door sensor and a smoke sensor attached to the printed circuit board, characterized in that it comprises a fire door opening fixed device.