KR20100004361A

KR20100004361A - Automatic closing apparatus for fire door

Info

Publication number: KR20100004361A
Application number: KR1020080064485A
Authority: KR
Inventors: 신양섭
Original assignee: 삼화금속 주식회사
Priority date: 2008-07-03
Filing date: 2008-07-03
Publication date: 2010-01-13

Abstract

The present invention discloses a fire door automatic closing device. The present invention has one end connected to the door frame frame through a connecting link has a rotating shaft that is rotated forward and backward by opening and closing the fire door, and the door closer to close the fire door by hydraulic pressure, and electrically connected to the other end of the rotary shaft of the door closer The sliding hook unit reciprocates horizontally in accordance with the opening and closing of the fire door, and is supported to be movable on one side in the moving direction of the sliding hook unit. When the door is opened, the sliding hook unit is locked to move together with the sliding hook unit and act on the smoke detection signal. Sliding door release for releasing the locking hook unit by the lock, and the door release fixing means for fixing the sliding door release moving in accordance with the opening of the fire door to the completed position of the fire door and the entire link except the link With casing attached to fire door .

According to the present invention, all components including the door closer are built in one casing, and the appearance is beautiful, as well as being made of a single body. Will be.

Description

Automatic closing apparatus for fire door

The present invention relates to a fire door that is installed in the entrance or passage of various building structures to prevent the spread of flames and smoke to an adjacent area in the event of a fire, more specifically, consisting of a single body, as well as new, (旣) Installation The fire door automatic closing device is designed to be easily mounted on the fire door to keep the fire door open in normal (non-fire), and to close the fire door quickly in the event of a fire.

In general, various building structures have passages for entry and exit, especially in large buildings such as buildings or apartments where many people reside in the building, and several passageways such as elevators and emergency stairs and / or corridors are provided together. have.

Therefore, in the event of a fire, the flame spreads rapidly through these passages and there is a high possibility of spreading to a large fire disaster, and in fact, many fire accidents occurring in apartments, etc., are leading to a large fire by spreading the flames rapidly through these passages.

As a result, mandatory installation of fire doors that block spaces in order to suppress or delay the spread of fire in case of emergency in the case of large group residential buildings such as buildings and apartments, in particular, the entrance and the boundary of each passage, etc. have.

Such a fire door is fixed to an open state for the convenience of users and is made to close automatically only in the event of a fire. To this end, the fire door is provided with a device for automatically closing the door, and a fixing release means such as a door release operated by a signal of the fire detection means is provided on the wall.

On the other hand, door closer and auto hinge device are mainly used to close the door automatically.They need to install a door release on the wall to fix the fire door in the open state and release it in case of fire. There is a troublesome problem.

In addition, in the case of auto hinge, it has an external advantage because it is built in the door, but it is difficult to install in the pre-installed door, whereas in the case of the door closer, it is easy to install on the new door and the installed door instead of the external disadvantage. Has

Accordingly, in recent years, there are a number of devices that can be easily installed by directly mounting the door to the door closer without installing a fixing release means for fixing the fire door in the open state and releasing it in case of fire.

For example, Korean Patent Registration No. 10-0567769 and Utility Model Registration Nos. 20-0432692 and 20-0410354 can be found, and these technologies are simply the top or door of a door closer that is commonly used. It is installed in the door frame frame separately from the connection link or door closer connecting the closure to the door frame, and still has a disadvantage in that the installation is not only complicated and weak in appearance.

The present invention was devised in view of the above-mentioned conventional problems, and consists of a single body, as well as a new installation, and is easily installed on a pre-installed fire door to keep the fire door stable in an open state (non-fire). The purpose of the present invention is to provide an automatic fire door closing device that can close the fire door quickly in case of fire.

Fire door automatic closing device according to the present invention in order to achieve the above objects, the one end is connected to the door frame frame through a connecting link has a rotating shaft which is rotated forward and backward by the opening and closing of the fire door, closing the fire door by hydraulic Giving door closers; A sliding hook unit which is electrically connected to the other end of the rotating shaft of the door closer and reciprocates horizontally according to opening and closing of the fire door; A sliding door release movably supported on one side of the sliding hook unit in a moving direction and locking the sliding hook unit when the fire door is opened to move together with the sliding hook unit, and releasing the locking of the sliding hook unit by a smoke detection signal; Door release fixing means for fixing the sliding door release moving in accordance with the opening of the fire door to the open completion position of the fire door; And a casing attached to the fire door by embedding the entire component except the connection link.

According to one preferred feature of the present invention, the sliding hook unit has a pinion mounted on the other end of the rotating shaft of the door closer, and a sliding rack disposed parallel to the door closer with the rack gear engaged with the pinion and supported by the guide; At one end of the sliding rack, the hook is provided to protrude so as to face the sliding door release.

According to another preferred feature of the invention, the sliding door release, and the case is guided to the guide means having a hook insertion hole into which the sliding hook is inserted; A hook-type hook holder which is hinge-assembled in the case to lock the sliding hook, and has a hooking jaw at one end and is elastically biased in a direction of releasing the locking of the sliding hook; A holder locker which is hinge-assembled in the case with a catching protrusion elastically caught on the catching jaw of the hook holder and elastically biased so that the catching protrusion contacts the outer circumference of the hook holder; It is provided in the case, and provided with the solenoid which rotates a holder locker in the elastic opposite direction according to the smoke detection signal from the exterior.

According to another preferred feature of the present invention, the door release fixing means is installed in the casing side by side in the moving direction of the sliding door release, a ratchet bed having a plurality of toothed teeth at regular intervals, and movable to the sliding door release And a ratchet which is elastically biased toward the ratchet bed and one end is elastically sandwiched between the teeth of the ratchet bed.

According to the present invention, all the components including the door closer is built in one casing, the appearance is beautiful, as well as made of a single body, as well as new installation as well as a conventional door closer is very easy to install fire doors I can attach it.

In addition, it keeps the fire door open and stable in normal (non-fire), but can close the fire door quickly in case of fire, which can greatly reduce the damage caused by the fire. If necessary, the fire door can be opened and closed easily.

Therefore, the present invention has the effect of greatly contributing to the improvement of the constructability and reliability of the fire door and the ease of use.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

1 to 6, the automatic fire door closing device according to the present invention, the door closer 20 to automatically close the fire door (D) in the open state, and the door closer 20 in accordance with the opening and closing of the fire door (D) Sliding hook unit 30 reciprocating horizontally in conjunction with the rotating shaft 23 of the fire door (D), and in the same direction along the sliding hook unit 30 at the time of opening the fire door (D) after the maximum of the fire door (D) A sliding door release unit which is fixed in a state in which the sliding hook unit 30 is locked in the open position and releases the sliding hook unit 30 by the signal of a smoke detector (not shown) installed in the building. 40 and a casing (10) fixed to the fire door (D) incorporating the above-described components.

The casing 10 is composed of a rectangular base 11 made of a metal plate on which other components are installed, and a cover 12 detachably assembled to the base 11 to cover the components installed on the base 11. do.

The door closer 20 is a conventional one widely used for the automatic closing of the swing door. However, only the configuration of the rotating shaft 23 has a configuration in which the sliding hook unit 30 reciprocates horizontally according to the opening and closing of the fire door D.

As is well known, the door closer 20 has an oil chamber 21 having an oil chamber 21a therein and a rack gear 22a around its outer circumference with an oil chamber 21 of the body cylinder 21. The body cylinder has a piston rack 22 accommodated in 21a and a pinion 23a engaged with the rack gear 22a of the piston rack 22 so as to be orthogonal to the moving direction (vertical direction) of the piston rack 22. The rotating shaft 23 penetrates 21, and the one end is fixed to this rotating shaft 23, and the other end is the connection link | route 24 of the one-piece structure which is pivotally supported by the door frame frame.

The body cylinder 21 is provided with a flow passage 21b for communicating the two zones of the oil chamber 21a partitioned by the piston rack 22 to induce the movement of oil, and the flow passage 21b is the body cylinder 21. It can be adjusted by the hydraulic control valve 25 provided in).

The piston rack 22 is elastically biased in the closing direction of the door by the compression coil spring 26, and has a check valve 27 for reducing the closing speed of the door at one end thereof.

The sliding hook unit 30 has a pinion 23b mounted on the other end of the rotation shaft 23 of the door closer 20 and a rack gear 31a engaged with the second pinion 23b on the upper surface of the door closer 20. Sliding rack (31) installed side by side and reciprocating horizontally installed side by side, and protruding to one end of the sliding rack 31, the hook 32 is locked to the door release 41 to be described later And a guide 33 supporting the sliding rack 31 on the base 11 of the casing 10 to be movable.

The rack gear 31a of the sliding rack 31 is formed to have a length corresponding to the opening angle of the fire door D. In general, a swing door such as the fire door D has an opening degree of 90 ° to 180 °. It is formed to a length corresponding to the angle. By the way, depending on the building, sometimes it may have an opening degree of 90 degrees or less, Preferably it is set to correspond to the opening degree of about 70 degrees-180 degrees.

This sliding rack 31 is preferably provided with a plurality of bearings, for example roller bearings 34, as shown in FIG. 10, as shown in FIG. 10 for smooth movement.

The guide 33 may be configured in various forms. In this embodiment, the sliding rack 31 is spaced apart as shown, for example, so as to stably support the movement of the sliding rack 31. It consists of two guide blocks 35 and 36 which wrap and support.

On the other hand, when the fire door (D) is closed due to the fire, it should not be opened easily even by the wind pressure of the fire zone, preferably, at least one of the two guide blocks (35, 36) to close the fire door (D) The closing and holding means 37 may be further provided to keep it firmly in a closed state.

As shown in FIG. 10, the closing and holding means 37 of the present invention forms a ball seat 31b on a surface in sliding contact with the sliding rack 31 of the guide block 35, and the guide block. It is comprised by attaching the locking ball 38 which is elastically matched with the ball seat 31b of the sliding rack 31 in 35. As shown in FIG.

The locking ball 38 is inserted into the guide block 35 to form a receiving hole 35a so as to be orthogonal to the sliding rack 31, and is supported by the compression coil spring 38a and a screw 39 at the rear thereof. A part of the body protrudes out of the sliding contact surface of the guide block 35.

At this time, the ball seat 31b of the sliding rack 31 is formed at a position where the locking ball 38 can be correctly seated (a position where the opening degree of the fire door is o °) in the closed state of the fire door (D).

Accordingly, in the state in which the fire door D is opened, the protrusion of the locking ball 38 enters the receiving hole 35a of the guide block 35 while compressing the compression coil spring 38a, and the fire door D is closed. Only by protruding elasticity of the compression coil spring 38a to elastically match the ball seat 31b of the sliding rack 31 to prevent the opening of the fire door (D) by the wind pressure.

The sliding door release unit 40 includes a door release 41 for locking and locating the hook 32 of the sliding hook unit 30 and a sliding hook unit 30 when the fire door D is opened. A door release guide means 56 for guiding the door release 41 to move together and a door release fixing means 59 for fixing the door release 41 at the maximum open position of the fire door D. FIG.

As shown in Figs. 6 to 7C, the door release 41 has upper and lower cases 41a and 41b having hook insertion holes 42a and 42b on one side facing the hook 32, and the upper and lower cases ( 41a and 41b, respectively, are hinged to the hook holder 43 for hanging the hook 32, and the holder locker 49 for locking the hook holder 43 in a fixed state of the hook 32; A solenoid 52 is provided to release the holder locker 49 in response to the smoke detection signal.

The guide case 41c is formed in the upper case 41b so that the release pin 50 of the holder locker 49 described later can penetrate and rotate.

The hook holder 43 has a hook-shaped first holder 44 having a hook catching groove 44c on which one hook 32 is fitted and a hooking jaw 45b at one end thereof. 44 and the L-shaped second holder 45 connected to the lower portion so as to be relatively rotatable and coupled to the first hinge 43a coaxially together.

The first and second holders 44 and 45 are provided with lugs 44a and 45a corresponding to the other ends so as to protrude upwards, and the adjusting screw 47 provides the compression coil spring 46. It penetrates through the lug 44a of the first holder 44 and is screwed to the lug 45a of the second holder 45 so as to be integrally connected to each other and rotate together.

That is, the compression coil spring 46 is positioned between the lug 44a of the first holder 44 and the head of the adjusting screw 47 so that the first and second holders 44 and 45 are integrated by the elastic force. Will be connected so as to overlap, by adjusting the tightening and loosening of the adjusting screw 47 will be able to adjust the coupling force.

In addition, the head 44b of the first holder 44 is a selective sole rotation of the first holder 44, and thus the locking protrusion 49a of the holder locker 49 described later is the locking jaw 45b of the second holder 45. The outer circumferential surface is convexly bent at approximately the middle portion to release it so as to escape from the side), and only the tip side portion thereof contacts with the locking protrusion 49a of the holder locker 49 during rotation.

The hook holder 43 has a head 44b of the first holder 44 which opens the hook insertion holes 42a and 42b of the upper and lower cases 41a and 41b by the first torsion spring 48. Elastic bias toward the

On the other hand, the hook holder 43 is composed of the first and second holders 44 and 45 which are connected to each other so as to overlap each other as described above, even when the fire door D, which is always open, is required even in the case of non-fire. In order to be able to close manually by applying a constant force according to this, the required external force required for manual opening is an adjustment screw for integrally connecting the first and second holders 44, 45 of the hook holder 43 ( 47) by adjusting the elasticity of the compression coil spring 46.

The holder locker 49 has a locking protrusion 49a fitted to the hooking jaw 45b of the hook holder 43 and the second holder 45 at one side of the body, and the solenoid 52 is caught at the other side according to the smoke detection signal. And a release pin 50 for releasing the locking device 49a from the locking step 45b of the second holder 45. The holder locker 49 is coupled to the second hinge 49b to be elastically biased in a direction opposite to that of the hook holder 43 by the second torsion spring 51 to fix the hook holder 43 in position. do.

Although the locking protrusion 49a may have a configuration that protrudes separately from the body of the holder locker 49, the locking protrusion 49a may be inserted into and removed from the locking jaw 45b of the second holder 45 by the rotation of the holder locker 49. It can only be released by the head 44b of the first holder 44 that rotates during manual closing, as shown in the figure corresponding to the locking jaw 45b on one side of the body of the holder locker 49 It is enough to construct the corners.

The release pin 50 has an arm 49c positioned on the upper portion of the hook holder 43 so as not to interfere with the rotation of the hook holder 43, and is installed vertically upwardly at the distal end of the arm 49c. It passes through the guide hole 41c of the upper case 41b.

The solenoid 52 is mounted on the upper case 41b, and has a pin hole 53a at the distal end of the shaft 53 to be coupled to the release pin 50 of the holder locker 49.

Meanwhile, brackets 55a and 55b for attaching the door release 41 to the guide means 56 to be movable are attached to the front and rear surfaces of the door release 41, among which the front side (the entrance side of the hook) is attached. The slot (55a) attached to the surface) is formed with a slot (55c) for the entrance and exit of the hook (32).

The door release guide means 56 may be configured in various forms. For example, as shown, two support brackets 57a and 57b are disposed to face each other on the base 11 of the casing 10. ) And a plurality of guide rods 58 each of which is fixed to the support brackets 57a and 57b through the brackets 56a and 56b attached to the front and rear surfaces of the door release 41. have.

Meanwhile, as shown in FIGS. 8 and 9, the door release fixing means 59 includes a ratchet bed 60 installed side by side on the movement path of the door release 41 of the base 11, and a door release ( 41 is composed of a ratchet 62 attached to the rear side in the direction of travel and elastically hung at an arbitrary position of the ratchet bed 60.

Ratchet bed 60 has a plurality of teeth (60a) at the same interval, each tooth (60a) in front of the inclined surface (60b) to allow the progression in only one direction (movement direction of the door release when opening the fire door) The back has a sawtooth shape consisting of a vertical surface (60a).

The ratchet 62 is movably coupled to the operation hole 61a of the housing 61 attached to the rear bracket 56b of the door release 41 to be orthogonal to the ratchet bed 60 at the top of the ratchet bed 60. Is positioned to. The ratchet 62 is elastically biased downwardly (at the ratchet bed side) by the compression coil spring 63 supported by the cap 64 by being inserted into the operation hole 61a of the housing 61 so as to surround the lower end thereof. Protrudes downward of the 61 is elastically coupled to the teeth (60a) of the ratchet bed (60).

The lower end of the ratchet 62 is composed of an inclined surface 62a so as to correspond to the teeth 60a of the ratchet bed 60, and moves over the teeth 60a of the ratchet bed 60 as the door release 41 moves. Can be.

Accordingly, the door release 41 may be pushed back according to the opening of the fire door D. However, once the fire door D is completely opened, the door release 41 cannot be returned to its initial position by the door release fixing means 59. It is firmly fixed to the.

By the way, for example, if the fire door (D) installed in a specific place is moved to another place or the inevitable opening angle is changed, the door release 41 must be moved to the initial position before opening the fire door (D), Preferably, the ratchet 62 of the door release fixing means 59 of the present invention protrudes to the upper part of the housing 61 through the cap 64 supporting the compression coil spring 63, and protrudes from the upper end thereof. The handle 65 is configured to lift the ratchet 62 manually from the ratchet bed 60 if necessary.

Next, the operation of the automatic fire door closing device according to the present invention configured as described above will be described.

First, the automatic fire door closing device 1 of the present invention, as shown in Figs. 1 and 2, is attached to the upper portion of the inner surface of the fire door (D) similar to the normal door closer, the connection link of the door closer 20 (24) The free end is fixed to the door frame frame (F) to be installed in the fire door (D).

In the state in which the fire door D is closed after the first installation, the sliding hook unit 30 and the door release 41 are located at the leftmost (initial position) in the drawing. At this time, the hook holder 43 of the door release 41 is The first torsion spring 48 is rotated in the clockwise direction in the drawing so that the hook insertion holes 42a and 42b of the upper and lower cases 41a and 41b remain open, and thus the holder locker 49 The two torsion springs 51 are rotated clockwise while deforming the torsion springs 51 so that the locking projections 49a are in close contact with the outer circumference of the first holder 44 of the hook holder 43.

In this case, the place where the door release 41 is located is a point where the opening degree of the fire door D is 70 ° as shown in FIG. 8, and the opening degree is the gear 31a of the sliding rack 31. Of course, it may vary depending on the set length of the ratchet bed (60).

In this state, when the fire door D closed as shown by the virtual line in FIG. 2 is opened, the rotating shaft 23 of the door closer 20 fixed to the one end to the connection link 24 as shown in FIG. This is rotated in the clockwise direction, whereby the piston rack 22 engaged with the first pinion 23a of the rotation shaft 23 is moved to the right in the drawing while compressing the compression coil spring 26.

At this time, the oil is in the right region of the oil chamber 21a of the body cylinder 21, the oil of the oil chamber 21a through the flow passage 21b of the body cylinder 21 and the check valve 27 of the piston rack 22. Exit to the left section.

At the same time, the sliding rack 31 engaged with the second pinion 23b mounted on the other end of the rotation shaft 23 of the door closer 20 is moved to the right in the drawing so that the hook 32 is shown in Fig. 7A. In the same manner, the door insertion slots 42a and 42b of the door release 41 are entered.

Then, the hook holder 43 of the door release 41 is pushed by the hook 32 into which the door holder 41 enters, and as shown in FIG. 7B, the first torsion spring 48 is rotated counterclockwise while deforming the first torsion spring 48. The head 44b of the 44 blocks the hook insertion holes 42a and 42b so that the hook 32 is trapped in the hook catching groove 44c.

When the hook holder 43 is rotated counterclockwise by the hook 32, the holder locker 49, which is restrained by the head 44b of the hook holder 43, is first torsion spring 51. Rotation in the counterclockwise direction by the resilient elasticity of the () is so that the locking projection (49a) is elastically fitted to the locking jaw (45b) of the hook holder 43, the second holder (45). Then, the hook holder 43 is restrained by the holder locker 49 to fix the hook 32 in a state in which the hook 32 is locked in the hook locking groove 44c.

At this time, when the hook 32 pushes the hook holder 43 of the door release 41 by the sliding rack 31, the door holder fixing means 59 can only move rearward, so the hook holder Although the 43 may be pushed out without restraining the hook 32, the door release fixing means 59 of the present invention has a ratchet structure, so that the hook holder 43 is closed before the door release 41 is pushed. The first operation is to restrain the hook 32.

That is, in the door release fixing means 59 of the present invention, the ratchet 62 is elastically tightly coupled to the ratchet bed 60, and the teeth 60a of the ratchet bed 60 are inclined on the front surface thereof ( 60b) having a sawtooth shape, in order for the door release 41 to move, the ratchet 62 has to rise while compressing the compression coil spring 63 to ride over the teeth 60a of the ratchet bed 60. Since the bar and the hook holder 43 need more force than the first torsion spring 48, the restraint of the hook holder 43 is first released before the door release 41 is pushed out to restrain the hook 32. It will be possible.

After the hook 32, which has been moved to open the fire door D, is constrained to the door release 41, the door release 41 itself is moved by the sliding force of the sliding rack 31 as shown in FIG. They are pushed together to move along the guide rods 58 of the guide means 56.

The movement of the sliding rack 31 and the door release 41 continues until the fire door D is completely opened, and when the opening of the fire door D is completed, the ratchet 62 of the door release fastening means 59 is applied. The door release 41 is fixed by being caught by the teeth 60a of the ratchet bed 60 in position.

The embodiment of the present invention is configured to accommodate the opening degree of the fire door (D) to 70 ° ~ 180 ° bar, as shown by the virtual line in Figure 8 in relation to the structure of the building within the opening range It can be fixed simply and accurately to the actual maximum opening degree of the fire door (D) without.

On the other hand, when it is necessary to close the fire door D as necessary during non-fire, if it is closed by applying a force or more than a predetermined force to the fire door D, which is opened and fixed by the door release 41, as shown in Fig. 7C. As described above, the second holder 45 of the door release 41 hook holder 43 remains the same, and only the first holder 44 is rotated in the clockwise direction while the head 44b is pulled by the hook 32 to close it manually. It becomes possible.

That is, the hook holder 43 of the door release 41 of the present invention is elastically connected by the compression coil spring 46 by overlapping the first and second holders 44 and 45 which can be rotated relative to each other. The second holder 45 is restrained by the holder locker 49, and only the head 44b of the first holder 44 hangs the hook 32. The fire door D has a predetermined force (compression coil spring). When closed by a force greater than the elasticity of the second holder 45 is intact and only the first holder 44 is rotated by a predetermined angle clockwise while deforming the compression coil spring 46 to release the restraint of the hook 32 It is to let.

At this time, the head 44b of the hook holder 43 and the first holder 44 is convexly curved in the middle of the outer circumferential surface so that only the tip portion of the head 44b contacts the locking protrusion 49a of the holder locker 49. Rotation of the first holder 44 by manual external force causes the hook 32 to escape from the hook catching groove 44c, and at the same time, the bent portion (bend edge) of the outer circumferential surface of the head 44b of the holder locker 49 The restraint of the second holder 45 is also released at the same time by pushing the catching protrusion 49a to separate from the catching jaw 45b of the second holder 45.

Accordingly, the hook 32 is pulled out and the second holder 45 is returned to its initial state such that the first and second holders 44 and 45 are overlapped again by the restoration elasticity of the compression coil spring 46. The holder 43 itself is rotated clockwise as shown in FIG. 7A to return to the initial state before the hook 32 is caught.

Of course, at this time the door release 41 does not return, only the sliding hook unit 30 is returned to the initial position, the door release 41 is set at the maximum opening position of the fire door (D) at any time when opening The hook 32 may be constrained by the hook holder 43 of the door release 41.

11 to 13 schematically show another embodiment of the fire door automatic closing device 1 according to the present invention.

In this embodiment, in the configuration of the above-described embodiment, the hook 32 of the sliding hook unit 30 is movably coupled to the sliding rack 31, and the hook length to arbitrarily adjust the protruding length of the hook 32 The control means 70 is further provided.

Hook length adjusting means 70 is provided so as to penetrate the head of the rack gear 71 and the sliding rack 31 formed on one rod portion (32a) of the hook 32 is formed in a U-shaped hook (32) And an adjusting shaft 74 for forcibly moving and fixing in the longitudinal direction (moving direction of the sliding rack).

To this end, the head of the sliding rack 31 has a pair of spaced coupling holes 72a in which the two rod parts 32a of the hook 32 are movably coupled, and one adjustment in which the adjustment shaft 74 is assembled. The holes 72b are formed to be orthogonal to each other, and one of the pair of coupling holes 72a is formed such that a part thereof overlaps the adjusting hole 72b.

And the adjusting hole 72b has the spline hole part 73 in which the spline was formed by the fixed length at one end part.

The adjustment shaft 74 is a spline coupled to the spline hole portion 73 of the pinion 75 and the adjustment hole 72b engaged with the rack gear 71 formed on one rod portion 32a of the hook 32 on the outer circumference. The axes 76 are spaced apart. The distance between these pinions 75 and the spline shaft 76 is set to a length such that the spline shaft 76 can completely escape from the adjusting hole 72b when the adjusting shaft 74 is pulled out.

And the pinion 75 of the adjustment shaft 74 engages with the rack gear 71 of the hook 32 in relation to the stroke of the adjustment shaft 74 even when the spline shaft 76 is pulled out of the adjustment hole 72b. It has a longer length than the spline shaft 76 so that it can always bite with the rack gear 71 of the hook 32.

One end of the adjustment shaft 74 protrudes out of the adjustment hole 72b of the sliding rack 31, and the adjustment shaft 74 is formed on the upper surface of the head of the sliding rack 31 on which the adjustment shaft 74 protrudes. The support plate 77 which penetrates is spaced apart by the some pin 77a. Compression coil spring 78 for automatically returning the adjusting shaft 74 drawn out for adjusting the protruding length of the hook 32 between the support plate 77 and the spline shaft 76 of the adjusting shaft 74 to the initial position. This intervenes.

The remaining reference numeral 74a is a knob assembled to the protruding end of the adjusting shaft 74, and 79 is an end ring supporting the other end of the adjusting shaft 74 so as not to be separated.

The method of adjusting the protruding length of the hook 32 through the embodiment of such a configuration is as follows.

First, as shown in FIG. 12, the adjustment shaft 74 is pulled out and the spline shaft 76 is separated from the spline hole 73 of the adjustment hole 72b. Then, the adjustment shaft 74 is in a rotatable state, and at this time, the pinion 75 of the adjustment shaft 74 is left with the rack gear 71 of the hook 32.

In this state, when the adjusting shaft 74 is rotated to the left or the right, as shown in Fig. 13, the hook 32 is moved by the rack gear 71 engaged with the pinion 75, so that the sliding rack 31 is moved. Direction of the protrusion is adjusted.

Then, after adjusting the protruding length of the hook 32, if the external force applied to the adjusting shaft 74 is removed, the spline shaft 76 of the adjusting shaft 74 is moved by the restoring elasticity of the compression coil spring 78. It is again inserted into the adjusting hole 72b of the sliding rack 31 to engage with the spline hole 73.

Accordingly, the rotation of the adjustment shaft 74 is prevented, and the adjustment shaft 74 is prevented from rotating so that the hook 32 is fixed in the adjusted state by the pinion 75 and the rack gear 71 bite. do.

In the embodiment of such a configuration, the fire door D can be fixed in position more accurately in accordance with the opening degree of the fire door D than in the above-described embodiment.

That is, in the above-described embodiment, the opening position of the fire door (D) is determined only by the teeth (60a) of the ratchet bed (60) formed at a predetermined interval, the fixed position of the fire door (D) is the ratchet bed (60) Inevitably depends on the angle corresponding to the pitch of the teeth (60a), in the case of this embodiment, in addition to the fire door (because it is possible to precisely adjust the protruding length of the hook 32 by the spline formed at a very dense angle) Fire door (D) can be fixed in position to match the maximum opening position of D).

On the other hand, Figure 14 schematically shows another embodiment according to the invention, in which the smoke detector 80 for operating the solenoid 52 of the door release 41 by detecting the smoke in the event of a fire casing (10) ) Is integrally attached to the unit.

The smoke detector 80 may be elastically mounted to the coupling slot 12a formed in the cover 12 of the casing 10 by having a plurality of hooks 81 on the rear surface thereof.

Accordingly, preferably, the battery means 90 for supplying the necessary power to the solenoid 52 and the smoke detector 80 is preferably provided inside the casing 10 to overcome the difficulty of power supply wiring. .

1 is a perspective view schematically showing a state in which a fire door automatic closing device according to the present invention is attached to a fire door;

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;

Figure 3 is an exploded perspective view of the automatic fire door closing device according to the present invention,

4 is a plan view of the coupled state of FIG.

5 is a cross-sectional view schematically showing a door closer;

6 is an exploded perspective view showing a sliding door release unit of the present invention;

7a to 7c are plan views showing the operating state of the door release,

8 is a cross-sectional view showing a door release fixing means of the present invention;

9 is an enlarged view showing the main portion of the door release fixing means;

10 is a cross-sectional view showing a fire door closing and keeping means of the present invention;

11 is an exploded perspective view showing another embodiment of the present invention;

12 is a cross-sectional view of the coupled state of FIG.

13 is a cross-sectional view taken along the line XIII-XIII of FIG. 12;

14 is a schematic cross-sectional view showing yet another embodiment of the present invention.

10: casing 11: base

12: cover 12a: coupling slot

20: door closer 21: body cylinder

21a: oil chamber 22: piston rack

22a: rack gear 23: rotating shaft

23a, 23b: Pinion 24: Link

30: sliding hook unit 31: sliding rack

31b: ball seat 32: hook

32a: rod 35, 36: guide block

38: rocking ball 40: sliding door release unit

41: door release 41a, 41b: upper and lower cases

42a, 42b: Hook insertion hole 43: Hook holder

44c: Hook engaging grooves 44, 45: First and second holders

44b: head 45b: locking jaw

47: adjusting screw 49: holder locker

49a: engaging protrusion 50: release pin

52: solenoid 56: door release guide means

59: door release fixing means 60: ratchet bed

62: ratchet 70: hook length adjusting means

71: rack gear 72b: adjustment hole

73: spline hole 74: adjustment shaft

75: pinion 76: spline shaft

80: smoke detector 90: battery means

D: Fire door F: Door frame

Claims

It is a device to fix the fire door installed in the building in the open state and to close the fire door automatically by the smoke detection signal in case of fire.

A door closer having one end connected to the door frame frame through a connecting link and having a rotating shaft rotated forward and backward by opening and closing the fire door, and closing the fire door by hydraulic pressure;

A sliding hook unit which is electrically connected to the other end of the rotating shaft of the door closer and reciprocates horizontally according to opening and closing of the fire door;

A sliding support is supported on one side of the sliding hook unit in a moving direction, and when the fire door is opened, the sliding hook unit is locked to move together with the sliding hook unit, and the sliding hook unit releases the locking by the smoke detection signal. Door releases;

Door release fixing means for fixing the sliding door release moving in accordance with the opening of the fire door to the open completion position of the fire door; And

And a casing attached to the fire door by embedding the entirety of the component except the connection link.

The sliding hook unit of claim 1, further comprising: a pinion mounted on the other end of the rotation shaft of the door closer, a sliding rack disposed parallel to the door closer with a rack gear engaged with the pinion, and supported by a guide; And a hook installed at one end of the sliding rack to protrude to face the sliding door release.

The sliding door release of claim 1 or 2, further comprising: a case guided to a guide means with a hook insertion hole into which the sliding hook is inserted;

A hook-type hook holder which is hinge-assembled in the case to lock the sliding hook, and has an engaging jaw at one end and is elastically biased in a direction of releasing the locking of the sliding hook;

A holder locker which is hinge-assembled in the case with a locking protrusion elastically caught to the locking jaw of the hook holder, and the locking protrusion is elastically biased to contact the outer circumference of the hook holder;

And a solenoid installed on the case, the solenoid rotating the holder locker in an opposite direction of elasticity in response to a smoke detection signal from the outside.

The hook holder according to claim 3, wherein the hook holder has a hook catching groove into which the sliding hook is fitted, and the outer circumference contacts the locking protrusion of the holder locker to rotate the holder locker in the opposite direction of elasticity only when the sliding hook is unlocked. A hook-shaped first holder having a head at one end and a lug at the other end vertically;

An L-shaped second holder overlapping a lower portion of the first holder and having the locking jaw at one end thereof and vertically having a lug at the other end thereof;

Penetrated through the lug of the first holder and screwed to the lug of the second holder, integrally connecting the first and second holder via a compression coil spring between the head and the lug of the first holder. With adjustment screw,

Fire door automatic closing device, characterized in that the intermediate portion is assembled in one hinge in the state where the first and second holders overlap each other.

The ratchet bed of claim 1 or 2, wherein the door release fixing means is installed in the casing side by side in the moving direction of the sliding door release, and has a plurality of toothed teeth at regular intervals;

And a ratchet movable to the sliding door release, the ratchet being elastically biased toward the ratchet bed and having one end elastically sandwiched between the teeth of the ratchet bed.

The fire door automatic closing device of claim 2, further comprising hook length adjusting means installed on the sliding hook unit to adjust and position the protruding length of the hook with respect to the sliding rack.

According to claim 6, The hook length adjusting means, The hook is movably coupled to the sliding rack,

Rack gears formed on the engaging portion of the hook and the sliding rack,

An adjustment hole formed in the sliding rack so as to be orthogonal to the hook, a portion of which overlaps with a portion of the engaging portion of the hook, and having a spline hole at one end;

A spline shaft coupled to the spline hole of the assembly hole and a pinion to be engaged with the rack gear of the hook, wherein the rack gear has a length longer than that of the spline shaft and is coupled to the adjustment hole to move the spline shaft to the outside. An adjustable shaft which can be pulled out;

And an elastic means for elastically biasing the adjusting shaft in a direction opposite to that of the adjusting shaft.

8. The fire door closing and holding means according to any one of claims 2, 6 and 7, further comprising a fire door closing and holding means for maintaining a closed state of the fire door which is closed due to a fire in the sliding hook unit. Fire door automatic closing device.

The fire door closing and holding means includes: a receiving hole formed to be orthogonal to the sliding rack in a guide for movably supporting the sliding rack; And a locking ball elastically biased to protrude toward the ball, and a ball seat formed on a contact surface of the sliding rack to guide the locking ball.

The fire door automatic closing device of claim 1, further comprising a smoke detector configured to detect a fire occurrence on one side of the casing and transmit a signal to the solenoid of the sliding door release.

11. The fire door automatic closing device according to claim 10, wherein a battery means for supplying power to the solenoid and the smoke detector is provided inside the casing.