KR101895156B1 - Fire door latching device - Google Patents

Abstract

The present invention achieves structural simplification, facilitates production and assembly, reduces wear, damage and power consumption, prevents heat generation, enhances durability, is capable of reducing noise and impact during operation, is capable of ensuring competitiveness based on high quality, continuously maintains a fire door opening state, and ensures safety by not hindering the closing operation of the fire door when necessary or in the event of a fire. The present invention includes a case installed on a door frame; latch means connected to a door closure installed in the fire door in the case to keep the fire door in an open state; and release means for usually keeping the latch means in a locked state so as to keep the fire door in an open state and releasing the latch means in the event of a fire to quickly close the fire door.

Description

FIRE DOOR LATCHING DEVICE

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fire door locking device, and more particularly, to an fire door locking device capable of maintaining an open state of a fire door and automatically closing a fire door when a fire occurs, To a hooking device.

Fire doors that are installed on the entrance or exit stairs of various buildings such as houses and commercial buildings, and fire doors that are installed in the reburn area automatically close the open door even if the user does not directly apply force, thereby eliminating the need to close the door manually It is common to install a door closer.

Especially, in case of the fire door installed in the evacuation staircase or the reconstruction area, it is necessary to close the fire door in order to prevent the spread of flame or smoke when a fire occurs and to keep the closed state stable. Respectively.

1, a body case of the door closure 10 is installed on an upper portion of a door 20, and a spring and an oil damper provided inside the body case rotate to rotate at a constant rotational force And an end of the main arm 12 is provided at the upper end of the operating shaft after the upper end of the operating shaft 11 is protruded to the upper portion of the body case. The other end of the link 13 is rotatably mounted on the door frame 30 by using the fixing bracket 14 so that the door 13 can be pivotally connected to the inside of the door closure The combination of the spring and the oil damper automatically closes the door by turning the operating shaft automatically.

Meanwhile, since the conventional door closure can adjust the final position of the door by adjusting the length of the link and the closing speed of the door through the adjustment of the oil damper, in order to maintain the door open to the user's needs, Door stopper is installed at the bottom of the door so that the door can be opened continuously in a place, time, or situation where the door need not be individually closed.

However, when a fire occurs inside the building in a state where the door is continuously opened using the door stopper as described above, the fire or smoke is spread by the opened door, and the damage due to the fire is greatly increased. A door closing device for controlling the door closure to automatically close the door when a fire has occurred has been developed, while maintaining the door open state by the user's intention in place of the door stopper for forcibly closing the door.

That is, the fire door locking device is installed in the door frame, and when the door is opened to the maximum by connecting the main arm of the door closure installed on the door and the connecting plates of the fire door locking device installed on the visiting frame, The main arm installed on the door closure is inhibited and the door is maintained in an open state. When a fire occurs in the building, a fire detection sensor that senses the fire or various sensing means that detects fire occurrence The closing device is automatically controlled so that the main arm of the door closure is moved so that the door is automatically closed by the door closure.

The applicant of the present application has filed a patent application for various kinds of fire door fastening devices as described above, and the contents of the most recent filed and registered fire door fastening devices will be described below.

Japanese Patent Application Laid-Open No. 10-1273056 discloses a device body 101 having a rectangular shape as shown in Figs. 2 to 3; A barrel 110 installed at the center of the apparatus body 101 so as to be able to be connected regardless of the open position of the door 102 and the door closer 103 mounted on the door 102; An open and hold means 130 for limiting the movement of the bar 110 in the apparatus body 101 at the position of the bar 110 so as to maintain the open state of the door 102; And a releasing means 150 provided at one side of the apparatus body 101 for releasing the opening and closing means 130 so that the bar 110 receives the force of the door closer 103 and closes the door 102, Constituting an automatic closing device; The bar 110 includes a connecting plate 111 protruding so as to be connected to the door closure 103; A connection wheel 112 integrally formed inside the connection plate 111; An operating wheel 115 rotatably coupled to the apparatus body 101 and coupled to the connecting wheel 112 by a securing means 116; A wheel receiving space 117 for accommodating the connecting wheel 112 below the operating wheel 115; The inner wall 119 of the wheel accommodation space 117 is provided with a fixing means 116 for preventing the flow of the connecting wheel 112 during the interlocking of the connecting wheel 112 to determine the opening position of the door 102 A toothed protrusion 122 forming an opening; And a positioning groove (125) formed in one direction of the outer surface of the operating wheel (115).

Published patent application No. 10-2012-0026847 Patent Registration No. 10-1273056

In the conventional art as described above, it is possible to select the positioning and releasing of the arm band by using the thin geared motor, so that when the fire signal is detected, the fire door is automatically closed by the power of the motor, Since the volume of the automatic closing device of the fire door is minimized and the appearance of the fire door can be minimized, the total volume (in particular, the height) of the fire door can be minimized so that the position where the door closes is fitted to the door top. It is not necessary to re-install the door closure to provide ease of installation, and when installed in close contact with the door frame, it secures a necessary space for wiring and provides an easy connection with a fire detector have.

However, in the related art, when a fault occurs in a motor by using a motor as a power source for closing a fire door or when a wiring or the like for supplying electric power to the motor is damaged due to a fire, even if a fire signal is applied, Therefore, it is not possible to release the restriction of the fire door by using the power of the motor. As a result, the fire safety door may not be automatically closed when the fire occurs.

In the case of a multi-story building, a fire door is provided for each floor, so electric power must be collectively supplied to all the automatic closing devices for fire doors installed in each floor when a fire occurs. In the process of expanding and contracting the multi- In the case where the electric power sufficient to supply electric power to the fire-fighting facilities installed in the fire-fighting area is not secured in advance, it is impossible to use the automatic closing device for the fire door due to the insufficient amount of electric power. There is a disadvantage in that electric power expansion work is inevitable and cost is incurred accordingly.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art. An engaging means connected to a door closure installed in the fire door to keep the fire door in an open state; And a releasing means for keeping the engaging means in a locked state so as to keep the fire door in an open state and releasing the engaging means when a fire occurs so as to quickly close the fire door;

By simplifying the structure, it is easy to produce and assemble while reducing wear, damage and power consumption, eliminating heat generation, improving durability, reducing noise and impact that can occur during operation, and excelling in quality. It is possible to maintain the open state of the fire door as well as to prevent the closing operation of the fire door at the time of a fire or if necessary, thereby ensuring safety.

The fire door latching device of the present invention is installed in the reenactment area of the building so that the fire door can be kept in an opened state and the fire door is automatically closed when a fire occurs so that the fire door can be prevented from being opened It has the effect of simultaneously providing fire safety.

In addition, since the structure is largely simplified by reducing the number of parts, assembly convenience and productivity are greatly improved, and post-processing of the main parts manufactured by the sintering method is unnecessarily assembled to improve the durability. And the manufacturing cost can be lowered by reducing the processing cost.

The cam plate can be released and interrupted by a small force by allowing the force transmitted to the engagement roller to be positioned in the longitudinal direction of the operation lever, thereby minimizing power consumption while reducing heat generation due to power consumption, It is possible to improve the overall quality and durability by eliminating the noise and the frictional noise at the time of hooking when the engagement roller is always in a connected state, and to secure safety at the time of occurrence of fire to ensure safety.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary view showing an installation state of a general door closer. Fig.
2 is an exemplary configuration diagram showing a fire door latch device to which the prior art is applied;
3 is a cross-sectional view of a fire door locking device to which the prior art is applied.
Fig. 4 is a perspective view of an explosion-proof door locking device to which the technique of the present invention is applied. Fig.
Fig. 5 is a configuration view of a flush door locking device to which the technique of the present invention is applied, in a flat section; Fig.
6 is a schematic view showing a state of a longitudinal sectional view showing a fire door locking device to which the technique of the present invention is applied;
7 is an exemplary view showing an installation state of a fire door locking device to which the technique of the present invention is applied;
Fig. 8 is a plan view of a fire door closing state of a fire door fastening apparatus to which the technique of the present invention is applied; Fig.
Fig. 9 is a plan view of a fire door interlocking apparatus to which the technique of the present invention is applied, in an open / close state of a fire door. Fig.
10 is a plan view of the fire door open / close state of the fire door fastening apparatus to which the technique of the present invention 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.

FIG. 4 is a perspective view showing an exploded state of the fire door latching device to which the technique of the present invention is applied, FIG. 5 is a block diagram of a flat cross-sectional state of the fire door latching device to which the technique of the present invention is applied, FIG. 7 is an exemplary view showing an installation state of a fire door locking device to which the technique of the present invention is applied, FIG. 8 is a view showing a fire door locking device to which the technique of the present invention is applied, Fig. 9 is a plan view of a fire door open / close state of a fire door latch device to which the technique of the present invention is applied, and Fig. 10 is a plan view of a fire door of the fire door latch device to which the technique of the present invention is applied. A plan view of the open holding state will be described together.

The fire door latching apparatus 100 to which the technique of the present invention is applied is connected to a door closure 103 installed in the fire door 102 inside the case 101 provided in the door frame to open the fire door 102 The holding means 110 and the catching means 110 are kept in a state of being kept in a locked state and the fire-blocking door 102 can be quickly closed by releasing the locking means 110 when a fire occurs (Not shown).

Although the upper part of the case 101 of the present invention is shown in an open form, it is an example for the sake of explanation, and it will be appreciated that the inner engaging means 110 and the releasing means 130 are closed with a cover so as not to be exposed And the shape and the shape of the case 101 can be implemented in various shapes and shapes depending on the specifications of the fire door 102 and the related components of the engaging device 100 and thus are not limited to those illustrated in the drawings of the present invention.

The engaging means 110 is formed by inserting a cam block 113 through a bushing 112 so as to cancel the rotational resistance of the actuating hole 111 formed at one side of the bottom surface of the case 101, And a cam plate 115 having a latching groove 114 formed on one side thereof is coupled to the upper side of the cam plate 113.

The cam block 113 is coupled to the cam block 113 and the cam plate 115 and the head 117. The cam block 113 is coupled to the head 117 of one end of the operation arm 116, The bolt 118 and the nut 119 are firmly coupled to each other.

A serration S is formed on the bottom surface of the cam block 113 and the top surface of the head 117 to determine the opening angle of the fire door 102 by determining the connection angle of the operation arm 116 in a multi- It is preferable to prevent the slip phenomenon in the coupled state.

The engaging groove 114 formed in the cam plate 115 is engaged with the engaging roller 122 held by the hinge pin 120 in the case 101 and engaged with the actuating lever 121 installed in the vertical direction of the case 101 So that it can be switched to the locked state and the released state.

The distance L from the center point P to the outer diameter of the position of the engagement groove 114 is longer than the distance L1 from the center point P to the outer diameter of the opposite position of the engagement groove 114 The outer surface is always kept in a state of being continuously connected with the engaging roller 122 so that the noise and shock due to the separation between the cam plate 115 and the engaging roller 122 in the process of opening and closing the fire door 102 .

The operation lever 121 is set to the point of action P1 of the hinge pin 120 and the action point P1 is positioned below the center point P of the cam plate 115 The operating point P2 which is the center of the roller pin 123 that engages the engaging roller 122 is located at the same linear position as the center point P of the cam plate 115 and the operating point P2 The distance L2 between the working point P1 and the operating point P2 is preferably the distance from the center point P to the working point P2 L3, the releasing means 130 can control the operation lever 121 with a minimum force.

The operation lever 121 includes a lever wing 125 for bending both sides of a plate-shaped lever plate 124 made of a metal material so as to be able to reinforce torsion and rigidity while mounting the engaging roller 122 Respectively.

The releasing means 130 is provided in the case 101 at the lower end position of the operation lever 121 so as to pull the operation lever 121 with a magnetic force so that the engagement roller 122 can be engaged with the engagement groove 114 An electromagnet 131 and a pulling spring 132 for pulling the operation lever 121 in cooperation with the electromagnet 131.

The pulling spring 132 may be a tension spring having one end connected to the case 101 and the other end connected to the operation lever 121. The pulling spring 132 may be disposed at a position opposite to the electromagnet 131, And the other end is a compression spring which is in close contact with the operation lever 121, and the like.

When the fire is detected, the electromagnet 131 interrupts the power supply to cut off the power to pull the operation lever 121. Normally, power is applied to the electromagnet 131 to always move the operation lever 121 to the cam plate 115, It would be natural to have them pull in the direction.

A tightening plate 135 having a high degree of flatness is inserted into a coupling hole 136 formed in the lever plate 124 so that a smooth coupling force with the electromagnet 131 can be maintained in the operating lever 121 in which the electromagnet 131 is located. The fixing bolts 137 and the nuts 138 are used to fix them.

The operating lever 121 is not horizontally connected to the horizontal ring 140 through the horizontal ring 140 of elastic material such as rubber, urethane or silicone between the lever plate 124 and the close- The tightening plate 135 is tilted in all directions so that the overseal plate 135 of the electromagnet 131 can always induce a close contact in a horizontal state.

The sum of the force by which the electromagnet 131 pulls the operation lever 121 and the force by which the pulling spring 132 pulls the operation lever 121 is greater than the force that the door closure 103 is intended to close the fire door 102 The force by which the pulling spring 132 pulls the operation lever 121 is smaller than the force to close the fire door 102 by the door locker 103. When the force of the electromagnet 131 disappears, So that the fire door 102 can be quickly closed.

The balance between the forces of the electromagnet 131, the pulling spring 132 and the door closer 103 is calculated in consideration of mathematical calculations and the size of the fire door, and thus the details of the present invention are not specifically described.

The state of use of the fire door fastening apparatus 100 to which the technique of the present invention as described above is applied will be described below.

The operation of opening and closing the fire door 102 is the same as that of opening and closing a general door. When the fire door 102 is to be opened and kept to be maintained, the user opens the fire door 102 to the maximum opening position The operation arm 116 connected to the door closure 103 is rotated and the cam block 113 and the cam plate 115 coupled to the operation arm 116 are also rotated to the open position.

The cam plate 115 is kept in the state of being continuously connected to the engagement roller 122 mounted on the operation lever 121 and the engagement roller 122 is moved to the position of the engagement groove 114 The engaging roller 122 is seated in the engaging groove 114, so that the engaging roller 122 does not move.

This is because the pulling spring 132 pulls the operating lever 121 to pull the operating point P2 about the operating point P1 in the direction of the center point P and the engaging groove 114 and the power is applied to the electromagnet 131 The lever 121 is pulled, so that the locked state can be maintained.

Of course, when the user applies a force to the fire door 102 with a force greater than the pulling force of the pulling spring 132 and the electromagnet 131 by the operating lever 121, the locking groove 114 is released from the locking roller 122 It will be appreciated that the fire door 102 is closed.

If there is no external force, the fire door 102 is kept open. When the fire is generated and the power is not applied to the electromagnet 131 to which the signal of the fire detector is applied, the operation of the electromagnet 131 Only the pulling spring 132 pulls the operating lever 121 and the door closure 103 moves to the side of the fire door 102. In this case, Since the closing force is greater, the fire door 102 is closed naturally so that the risk of a safety accident due to a fire can be excluded.

Particularly, according to the present invention, since the outer surface of the cam plate 115 and the engagement roller 122 are always kept in a connected state, noise, joints, and impact are not generated in the process of opening and closing the fire door 102.

When the cam plate 115 is transmitted to the engagement roller 122 and pushes the operation lever 121, the vertical load is transmitted from the center point P toward the operating point P2. The electromagnet 131 and the pulling spring 132 of the releasing means 130 provided at the lower position of the operating lever 121 pull the operating lever 121 because the operating lever 121 is installed in the vertical direction of the case 101 So that the force can be minimized.

That is, since the distance L2 between the working point P1 and the operating point P2 is short, the width of displacement of the engaging roller 122, which is in contact with the cam plate 115, is also small, 131 and the pulling spring 132 can be pulled more easily and a force is required.

In this way, when the force to pull the operation lever 121 is small, the size and power consumption of the electromagnet can be reduced, thereby eliminating the heat that may be generated in the process of maintaining the open state, It is possible to reduce the size of the pulling spring and the number and size of other related parts, thereby providing a fastening device of a compact size.

Since the closing plate 135 further coupled to the operating lever 121 can be moved in all directions by the horizontal ring 140 so that the operating lever 121 can not maintain the flatness or the operating lever is twisted The tightening plate 135 can be brought into tight contact with the electromagnet 131 even if there is a deformation such as the deformation of the operating lever 121 and the operating lever 121, will be.

The present invention as described above simplifies the structure and provides ease of production and assembly while minimizing wear and damage, thereby enhancing durability, providing superior external competitiveness, maintaining the open state of the fire door continuously The safety of the fire door can be ensured because it does not hinder the closing operation of the fire door at the time of fire or when necessary.

100; Fire door latching device
102; Fire door
110; [0030]
113; Cam block
114; Latching groove
115; Cam plate
116; Operating arm
121; Operating lever
122; Engaging roller
130; Release means
131; Electromagnet
132; Pull spring
135; Close plate
140; Horizontal ring

Claims (6)

A case 101 installed in the door frame;
An engaging means 110 connected to a door closure 103 installed in the fire door 102 to continuously maintain the fire door 102 in an opened state inside the case 101;
The releasing means 110 is held in the engaged state so as to keep the fire door 102 in the open state and releases the engaging means 110 when the fire occurs so that the fire door 102 can be quickly closed (130);
The engaging means 110 includes a cam block 113 which is inserted through a bushing 112 into an operation hole 111 formed at one side of the bottom surface of the case 101;
A cam plate 115 coupled to the cam block 113 at one side thereof with an engaging groove 114 formed thereon;
A head 117 of an operation arm 116 connected at one end to the door closure 103 and coupled to the lower side of the cam block 113;
An operation lever 121 held by the hinge pin 120 in the case 101 and installed in a vertical direction;
And an engagement roller (122) mounted on the operation lever (121) and disassembled and engaged with the engagement groove (114) to change the engagement and disengagement states;
The releasing means 130 includes an electromagnet 131 for pulling the actuating lever 121 by a magnetic force;
A pulling spring 132 for pulling the operation lever 121 in cooperation with the electromagnet 131;
An urging plate 135 coupled to the actuating lever 121 to enable close contact with the electromagnet 131 regardless of the level and the deformation of the actuating lever 121;
And a horizontal ring (140) interposed between the close contact plate (135) and the operation lever (121) to move the close contact plate (135) in all directions. delete delete The method of claim 1, further comprising:
The operating lever 121 is set to the operating point P1 of the hinge pin 120 and the operating point P2 which is the center of the engaging roller 122 is positioned at the left side of the operating point P1;
The operating point P2 is on the same position in the vertical direction with respect to the center point P of the cam plate 115;
The distance L2 between the operating point P1 and the operating point P2 is made shorter than the distance L3 between the operating point P2 and the center point P so that the releasing means 130 can be moved 121) to be interrupted. The method of claim 1, further comprising:
Wherein the cam plate (115) has an elliptical shape and is always connected to the latching roller (122) so as to exclude noise and impact when opening and closing the fire door (102). The method of claim 1, further comprising:
The sum of the force by which the electromagnet 131 pulls the operation lever 121 and the force by which the pulling spring 132 pulls the operation lever 121 is greater than the force that the door closure 103 is intended to close the fire door 102 and;
The pulling force of the pulling spring 132 by the operating lever 121 is lower than the force by which the door closure 103 is closed by the door closure 103. When the force of the electromagnet 131 is lost, So that the door (102) can be quickly closed.

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