KR101273056B1 - Automatic closer for a fire door - Google Patents

Abstract

The present invention provides a compact, easy production, assembly and installation, and can be applied regardless of the opening direction of the door as a single device, the fire door automatic closing device to make the appearance beautiful because the exposure is not severe during installation As for
A device body provided in a rectangular shape, a door rack mounted on the door and a arm bar installed at the center of the device body so as to be connected regardless of the open position of the door, and the movement of the arm bar inside the device body at the arm bar position is restricted. It is characterized in that it comprises an opening and holding means for installing to maintain the open state of the door, and a release means for releasing the opening and holding means so that the arm is closed on the door receiving the force of the door closer is installed on any one side of the device body to be.

Description

Fire door automatic closing device {AUTOMATIC CLOSER FOR A FIRE DOOR}

The present invention relates to an automatic fire door closing device, and more particularly, to reducing the number of parts, the fire door door automatic closing is improved to provide ease of assembly and installation while allowing the door to be fully opened in a compact size, in particular, in a thin thickness. Relates to the provision of a device.

The fire door automatic closing device is to automatically close the fire door in the open state to prevent the fall of smoke flames in the event of a fire, and the fire door automatic opening and closing device has already been applied for several patents (567771, 567772, 567774, 567775, 567769, 574416, and 656890).

Looking at the representative configuration of a pre-registered patent of the applicant of the present application as described above with reference to FIG.

The fire door automatic closing device 1 of the prior art has a motor 5 which is operated by the control unit 4 which receives the signal of the sensing means 3 at the center of the main body 2 provided in a rectangular shape.

One side of the motor 5 is fixed to the arm 6 connected to the fire door with the main body 2, the bolt 8 and the nut (9) via the operating plate (7), the fixing of the arm (6) A tooth 10 is formed at the position to engage the tooth 11 formed in the operation plate 7.

Positioning grooves (12) are formed in the operating plate (7) of the operating balls (15, 15 ') located on both sides via a spring (14) in the operating hole (13) formed below the motor (5). Engage with any one to keep it open.

The other operation ball 15 ′ is connected to a ball groove 18 formed on the inner side of the operation gear 17 engaged with the drive gear 16 fixed to the shaft of the motor 5 by the opening range of the fire door. It is configured as possible.

In the case of opening the door in the above state to maintain the open state, the ball in contact with the operating gear engaged with the drive gear fixed to the shaft of the motor is operated without being inserted into the ball groove formed in the operating gear By being in contact with the surface of the gear, the ball in the opposite position is inserted into the positioning groove formed in the operation plate, so that the armband connected to the normal door closer cannot be moved, thereby keeping the door open.

And, in the door closed state in which the open door can be closed by the door closer, the motor is operated by receiving a signal from the fire detection means, the operating gear is rotated by the motor to position the ball in the ball groove of the opposite position Since the ball and the spring is retracted, it is switched to the locating groove of the operation plate, so the arm can be easily moved by the door closer and can be closed.

In the prior art as described above, the operation plate and the ball are large enough to generate the force required to push the ball and compress the spring to keep the door closed by holding the arm with a force greater than the force to close the door. The use of a motor adds to the overall volume.

As the volume increases as described above, even when installed in the door frame, it protrudes a lot downward to harm the aesthetics, and the position for connecting the fire door automatic closing device and the door closer is not located at the top of the door but fixed at a lower position than the top. Since additional measures such as requiring a separate fixing plate must be taken, there is a problem in that mounting is not easy.

Since the power of the motor is transmitted to the ball, the spring and the ball through the driving gear and the operating gear, power loss occurs, which does not guarantee operability in the actual field, and is maintained only by the force of the spring when the door is opened. Therefore, when the user inverts the door with only a little force, the door is opened easily, which is inconvenient to use.

In order to adjust the opening position (opening angle) of the door, open the door to the position to be opened and then connect the disc and operating plate of the arm so that the teeth formed at the connecting position are engaged. It can be fixed firmly.

However, if you want to open the door completely (maximum open position), the door should be in close contact with the wall, and then the disc and the operating plate will be combined to secure the teeth after they engage each other, but the teeth are formed at an angle of 5 °. 5 ° at the door hinge is fine, but 5 ° at the door end has a significant gap, which in turn leads to considerable inconvenience for the user because the door is held in the maximum open position without being completely pressed against the wall. Will be.

In addition, since the armband for connecting with the door closer is connected to only one direction of the automatic fire door closing device, it must be manufactured separately for the right opening or the left opening according to the opening position of the door, so that the difficulty of production and assembly is of course accompanied. In other words, various problems are occurring, such as the cause of rising production costs.

In the present invention, in order to solve the above problems, the device body provided in a rectangular shape, and the armrest installed in the center of the device body to be connected to the door closer mounted on the door and irrespective of the open position of the door and Opening means for restraining the movement of the arm in the device body of the arm position to maintain the open state of the door, and is installed on any one side of the device body arm is delivered to the door closer to receive the door Consists of a release means for releasing the opening holding means to be closed, providing a compact and easy to manufacture, assembly and installation, can be applied regardless of the opening direction of the door with a single device, the appearance is not severe during installation It has such a feature that it can be made beautiful.

The present invention enables the selection and positioning of the armband using a thin geared motor, thereby minimizing the volume of the automatic fire door closing device, thereby greatly reducing the cost while providing ease of production and assembly without harming the appearance during installation. Can be.

Since the total volume (especially the height) of the fire door automatic closing device becomes small, the position of the door closer connected to it is matched with the top of the door, so it is not necessary to reinstall the door closer without requiring a separate reinforcement plate. Ease can be provided.

When installed in close contact with the door frame despite the small volume, it can secure the necessary space for wiring of wires and provide the ease of electrical connection with the fire detector. The armrest is located in the center of the automatic fire door closing device. It is an invention which has various effects, such as being usable universally, without being restricted by the opening direction.

1 is a perspective view of an exploded state showing a fire door automatic closing device to which the technique of the present invention is applied.
Figure 2 is a cross-sectional view taken along the line A-A showing a fire door automatic closing device to which the technique of the present invention is applied.
3 is a cross-sectional view taken along line B-B showing the automatic fire door closing device to which the technique of the present invention is applied.
Figure 4 is a cross-sectional view taken a portion C of the automatic fire door closing device applied to the technology of the present invention.
Figure 5 is a cross-sectional view showing a closed state of the automatic fire door closing device to which the technique of the present invention is applied.
Figure 6 is an exemplary view showing a state in which the automatic fire door closing device is applied to the technology of the present invention is installed.
Figure 7 is a block diagram showing a fire door automatic closing device to which the prior art is applied.

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

1 is a perspective view of an exploded state showing a fire door automatic closing device to which the technology of the present invention is applied, FIG. 2 is a cross-sectional view taken along line A-A showing the fire door automatic closing device to which the technology of the present invention is applied, FIG. Sectional view taken along line B-B showing the automatic door closing device according to the present invention, FIG. 4 is a cross-sectional view showing a portion C of the automatic door closing device according to the present invention, and FIG. 6 is a cross-sectional view illustrating a closed state of a fire door automatic closing device to which the technology is applied, and FIG. 6 is described as an exemplary view showing a state in which the fire door automatic closing device to which the technology of the present invention is applied is installed.

The automatic fire door closing device 100 to which the technology of the present invention is applied has a device body 101 in a rectangular shape, and is a conventional door closer mounted to the door 102 in front of the center of the device body 101. The arm 110 for connecting with the 103 is provided so that the ease of connection can be provided regardless of the open position of the door 102.

An opening holding means 130 is installed inside the device body 101 at the position of the arm 110 to maintain the open state of the door 102 by limiting the movement of the arm 110. 130 is configured to control the arm to close the door 102 by receiving the force of the door closer 103 by the release means 150 is installed on any one side of the device body 101. .

The arm 110 is formed integrally with the connecting plate 111 protruding to be connected to the door closer 103 and the connecting wheel 112 inside the connecting plate 111, the connecting wheel 112 Is coupled to the operating wheel 115 and the fixing means 116 is maintained on the shaft 114 as a bearing 113 to the device body 101 is rotatably coupled.

The wheel receiving space 117 is formed below the operating wheel 115 to accommodate the connecting wheel 112, and the wheel receiving space 117 at the connection position between the connecting wheel 112 and the connecting plate 111. It is to have a bent portion 118 to exclude interference with.

The inner wall 119 of the wheel accommodation space 117 and the outer surface 120 of the connecting wheel 112 have an inclined surface 121, and the teeth protrude in many places of the inner wall 119 of the wheel accommodation space 117. Opening of the door 102 while preventing the phenomenon in which the toothed protrusion 122 penetrates the connection wheel 112 and flows or turns when the connection wheel 112 is formed to be clamped by the fixing means 116. Make positioning easy.

The operation wheel 115, in which the wheel accommodation space 117 is formed, has a high strength by heat treatment, and the connection wheel 112 is softer than the operation wheel 115, so that the connection wheel is firmly interrupted by the fixing means 116. Since 112 112 penetrates the toothed protrusion 122, it is possible to prevent fluidity at the same time as the positioning.

One or one positioning groove 125 for actually determining the opening position of the door 102 is intermittently interposed by a positioning pin constituting the opening and holding means 130 in one direction of the outer surface of the operating wheel 115. It should be formed over.

The opening and holding means 130 is a position maintained by the guide 131 formed integrally with the device body 101 to enter and exit the positioning groove 125 formed in the operation wheel 115 to select the control and release The crystal pin 132 is provided.

One side of the rear of the positioning pin 132 is freely connected to the device body 101 and the shaft rotation and the other side of the positioning pin 132 along the guide groove 133 formed in the device body 101, The leaf spring 135 has a movable end 134 moving in the rearward direction so as to be advanced or retracted.

The release of the leaf spring 135 through the return spring 136 to assist the return to the intermittent position to the rear of the central portion of the leaf spring 135, the front and rear directions It is provided with a spring holder 137 for intermittent the leaf spring 135 moving to.

The spring retainer 137 is coupled to the device body 101 and the hinge pin 138, the upper end is provided with a plate-like retaining body 140 so as to be free to move, the hinge pin 138 has a return after release The return spring 141 is interposed therebetween.

In the middle of the retainer body 140 to engage the free end 134 of the leaf spring 135 to form a locking step 142 for maintaining the positioning pin 132 in an intermittent state.

The device body 101 at the position where the leaf spring 135 or the spring holder 137 retreats is configured through a damper 143 made of a buffer material such as rubber, urethane, or silicon so as to absorb shock and vibration. .

The release means 150 is a free end of the leaf spring 135 by pulling the lower end of the spring retainer 137 by the power of the motor 151 and the small motor 151 that is operated by receiving a fire from the fire detector And a retractor 152 for releasing the locked state of the 134.

The motor 151 preferably uses a geared motor capable of maintaining a small size of 1 cm and 1.5 cm or less in width and length, and the retractor 152 uses a cam 153 on the shaft of the motor 151. It is fixed to the cam 153 is configured by connecting a connecting rod 154 having a pull jaw 154 that can be pulled by walking the lower end of the spring retainer 137.

In the present invention, the configuration of the retractor 152 is composed of a cam and a connecting rod, but may be implemented in various forms such as a combination of a rack and a pinion, so that a simple design can be changed or replaced based on the technical contents of the present application. It will be appreciated that the phosphorus content may be included in the scope of the present application.

In the opposite position of the release means 150 is formed a terminal hole 163 having a door sensor 160 for detecting the closing of the door 102, a battery 161 and a terminal 162 for operation control. In addition, the terminal hole 163 is provided with a hole cover 165 on the bottom so as to facilitate opening and closing of the wire.

The terminal hole 163 is formed with a wiring hole 166 for wiring connection drawn out from the fire detector, the wiring hole 166 is the opening and holding means 130 and the release means stored in the device body 101 ( It is possible to provide the ease of wiring processing connected through the door frame by communicating through a space (S) formed between the upper surface of the cover 170 and the upper end of the device body 101 to prevent the exposure of the 150. Make sure

Referring to the operation of the automatic fire door closing device 100 to which the technique of the present invention is applied as described above are as follows.

The fire door automatic closing device 100 is completed by installing the door frame 103 and then connecting the door closer 103 installed on the door 102 and the connecting plate 111 constituting the armband 110.

As such, when the automatic fire door closing device 100 is installed, the opening position of the door 102 is first determined, which is a fixing means for controlling the operation wheel 115 and the connection wheel 112 constituting the arm 110. Loosen (116) so that the connecting wheel 112 can move freely.

In this state, the door 102 is opened and stopped at a position to be opened, and then the fixing wheel 116 is used to securely connect the connection wheel 112 to the operation wheel 115. When the connection wheel 112 is interrupted by the 116, the tooth protrusions 122 formed in a plurality of inner walls 119 of the wheel accommodation space 117 formed on the bottom surface of the operation wheel 115 form the outer surface 120 of the connection wheel 112. ) Will be digging into the shape so that the phenomenon of flow after being combined can be excluded.

In particular, the wheel accommodation space 117 and the connecting wheel 112 forms an inclined surface 121, the heat treatment of the operation wheel 115 to have a higher hardness than the connecting wheel 112 by the toothed projection ( 122 can easily penetrate the connecting wheel 112 to exert a fixing force.

Since the positioning is performed as described above, not only the open position of the door 102 can be freely determined, but also the door 102 can be easily maintained at the maximum open position, thereby increasing user convenience. .

After the opening positioning of the door 102 is completed, the positioning groove 125 formed in the operation wheel 115 does not open the door 102 until the set opening position when the door is closed after the door 102 is closed. And the positioning pins 132 constituting the opening and holding means 130 are not engaged with each other, so that when the user grabs the door 102 or operates the door stopper provided at the bottom of the door 102, the opening state is maintained. When it is released, it is naturally closed by the door closer 103.

In the case where the door 102 is opened to maintain the open state, when the user opens the door to the set open position, the operating wheel 115 rotates with the opening of the door 102. When the positioning groove 125 meets the positioning pin 132 in this process, the positioning pin 132 enters the positioning groove 125 by the force pushed by the leaf spring 135 so that the door is opened. It is possible because it is prevented from closing.

At this time, one side of the leaf spring 135 is freely connected to the device body 101 and the shaft rotation, the actuation end 134 of the substitute side is formed in the spring holding 137 in the return state by the return spring (141) Since the positioning pin 132 is pushed in the direction of the positioning groove 125 by the elastic force of the leaf spring 135, the elastic force of the leaf spring 135 is set by the locking jaw 142. It will be appreciated that the closure 103 is greater than the force to close the door 102.

If there is a fire in the process of continuing the open state of the door 102 as described above, the release means 150 is applied to the signal of the fire detector is activated to switch the spring holding 137 to the open position plate Since the movable end 134 of the spring 135 is released, it is retracted by the elasticity of the leaf spring 135 so that the positioning pin 132 is also out of the positioning groove 125.

Then, since the force that resists the door closer 103 disappears, it naturally closes, thus enabling the fire door to function. When evacuation for evacuation, the user opens the door 102 naturally. Naturally, the opened door is naturally closed by the door closer 103 as well.

In particular, since the release means 150 operates by receiving a signal from the fire detector, the spring retainer 137 is always held in the release position until the fire release signal is received, thus performing a fire door function and preventing evacuation of users. It will be apparent that such a series of motion control is performed by a controller (not shown).

Looking at the operation of the release means 150 to release the spring retainer 137, the motor 151, the fire detection is applied to rotate the cam 153, the connecting rod 154 connected to the cam 153 Pulling jaw 154 integrally formed at the end of the) is in the state connected with the lower end of the spring retainer 137, the connecting rod 154 pulls the spring retainer 137, the leaf spring is placed on the latching jaw 142 This is because the movable end 134 of the 135 is released.

When the movable end 134 is released, the force that pushes the positioning pin 132 disappears by moving backward along the guide groove 133 formed in the device body 101 by the elastic force of the leaf spring 135. will be.

Since the upper plate spring 135 and the spring holder 137 is retracted at a moment, it may cause a significant impact and noise when the device body 101 is in contact with the plate leaf 135 or the spring holder 137 is moved. It is absorbed and buffered by the damper 143 further provided in the device body 101 at the position.

When the fire release signal is applied in this state, the leaf spring 135 is moved to its original position by the force pushed by the return spring 136 provided at the rear, and at the same time, the motor 151 is operated again to connect the connecting rod 154. By allowing the pull jaw 154 to be in a position outside the lower end of the spring holder 137, the spring holder 137 is moved to the original position by the return spring 141 to move the leaf spring 135. Since the end 134 is located on the locking step 142, the initial state can be switched.

The present invention, because the arm 110 is located in the center of the device body 101 can be installed regardless of the opening position of the door 102, so that only one type can be produced and applied to all the doors productivity and cost It can contribute to savings.

Free positioning of the door is possible, and in particular, it is possible to realize the user's convenience by opening the door at 90 °, in which the door is completely in contact with the outer wall when determining the maximum opening position.

Since only a small force is needed to release the spring force of the leaf spring, the motor of the release means can be minimized, so that the size (thickness) of the entire device can be reduced. No change of position can provide ease of mounting.

By having a space (S) of the shape concave on the upper surface of the device body provides an easy connection of the terminal hole and the wiring of the bottom surface of the device body, and has the advantage of easy processing of the wires connected through the door frame.

100; Fire door automatic closing device 101; Device body
110; Rock band 112; Connecting wheel
115; Operating wheel 117; Wheel receiving space
122; Tooth projection 125; Positioning Home
130; Opening and holding means 132; Positioning pin
134; Movable stage 135; Leaf spring
136; Return spring 137; Spring retainer
142; Hanging jaw 143; Damper
150; Release means 151; motor
152; Tow

Claims (5)

An apparatus body 101 provided in a rectangular shape;
A armrest 110 installed at the center of the device body 101 to be connected to the door closer 103 mounted to the door 102 regardless of the open position of the door 102;
An opening and holding means (130) installed to maintain the open state of the door (102) by limiting the movement of the arm (110) inside the device body (101) at the position of the arm (110);
The fire door is installed on any one side of the device body 101 is released by means of the release means 150 to release the opening and holding means 130 to close the door 102 by receiving the force of the door closer 103 arm arm 110 Configure an automatic closing device;
The arm 110 has a connection plate 111 protruding long so as to be connected to the door closer 103;
A connection wheel 112 integrally formed inside the connection plate 111;
An operation wheel 115 rotatably coupled to the apparatus body 101 and coupled to the connection wheel 112 by fixing means 116;
A wheel accommodation space 117 formed to accommodate the connection wheel 112 below the operation wheel 115;
On the inner wall 119 of the wheel accommodation space 117, the connection wheel 112 is drilled when the connection wheel 112 is interrupted by the fixing means 116 to prevent the flow to determine the open position of the door 102 A tooth protrusion 122 for forming a dog;
Fire door automatic closing device characterized in that it comprises a positioning groove (125) formed in one direction of the outer surface of the operation wheel (115). The method of claim 1, further comprising:
The opening and holding means 130 includes a positioning pin 132 that is held by the guide 131 to enter and exit the positioning groove 125 of the operation wheel 115 constituting the arm 110;
The device body 101 and one side is freely connected to the shaft rotation and the other side has a positioning pin 132 having a movable end 134 moving in the front and rear directions along the guide groove 133 formed in the device body 101 The leaf spring 135 to control the;
A return spring 136 interposed at the rear of the leaf spring 135 to assist the return of the leaf spring 135;
A spring holding member 137 provided at a position of the movable end 134 to control the leaf spring 135 moving forward and backward;
The spring retainer 137 is a device body 101 and the upper body is coupled to the hinge pin 138, the holding body 140 is provided with a movement freely;
A return spring 141 assisting the return through the hinge pin 138;
Fire door automatic closing device characterized in that it comprises a locking jaw (142) formed in the middle of the holding body 140 to lock the free end (134). 3. The method of claim 2,
The release means 150 includes a small motor 151 that is operated by receiving a fire from the fire detector;
The cam 153 fixed to the shaft of the motor 151 and the free end 134 of the leaf spring 135 by pulling the lower end of the spring retainer 137 by connecting to the cam 153 Fire door automatic closing device, characterized in that consisting of a retractor 152 including a connecting rod 154 having a pulling jaw 154 to release. The method of claim 1, further comprising:
The terminal hole 163 is formed to include a door sensor 160 for detecting the closing of the door 102, the battery 161 and the terminal 162 for operation control in the opposite position of the release means 150. and;
A hole cover 165 provided to open and close the bottom of the terminal hole 163;
A wiring hole 166 communicating with the upper surface of the terminal hole 163 and the device body 101 to enable wiring connection;
Is connected through the door frame between the upper surface of the cover 170 and the upper end of the device body 101 closed to prevent exposure of the opening and holding means 130 and the release means 150 accommodated in the device body 101 Fire door automatic closing device characterized in that it further forms a space (S) for the wiring process. 3. The method of claim 2,
The device body 101 at the position where the leaf spring 135 or the spring retaining portion 137 constituting the opening and holding means 130 is retracted is provided with a damper 143 so as to absorb shock and vibration. Fire door automatic closing device.

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