RU2704907C2 - Fire door lock with latch bolt immobiliser - Google Patents

Abstract

FIELD: fire-fighting equipment.

SUBSTANCE: present invention discloses a lock for a fire door with a latch blocking device, which comprises housing (9), characterized by central axis (14) of symmetry and presence of equidistant holes for lock cylinders (12) made above and below central axis (14) for use in doors that open from right to left or from left to right, as well as the presence of latch (5), which extends forward from front plate (10) of lock at the level of central axis. Lock includes latch bolt (6), which is connected to traction bar (7) and thrust plate (8) and which is configured to move in locking position in horizontal direction and synchronously with said elements after actuation of drive (13), located on cylinder (12) of lock, preventing contact between drive arm (2a) of pivoted lever (2) and drive lug (7a) of pull bar (7) when performing rotary movement.

EFFECT: lock of a fire-prevention door with a latch blocking device is disclosed.

1 cl, 11 dwg

Description

The present invention relates to a fire door lock with a latch lock device, which comprises a housing characterized by a central axis of symmetry and the presence of equidistant openings for the lock cylinders made above and below the central axis for use in doors that open from right to left or left to right, and the presence of a latch that extends forward from the front of the lock at the level of the central axis.

BACKGROUND OF THE INVENTION

Given the current level of technological development, it is now widespread and known to use a central latch in locks for fire doors with two pivoting levers and cylinders symmetrically relative to the central axis of the lock. There are models in which, in addition to the latch, a deadbolt is provided that moves under the action of a leash on the lock cylinder. Such models of locks for fire doors are commercially available; however, they implemented two types of technical solutions with the disadvantages listed below. Firstly, in existing fire door locks, the rotation of the pivot arm that activates the latch retraction is usually blocked. Such locking of the pivot arm can damage the internal mechanisms of the lock if excessive torque is applied to the lock. Secondly, at present, it is possible to release the latch by acting on the handle or by performing certain manipulations when trying to unauthorized opening, even if the deadbolt is in the extended position. Such an action involving the removal of the latch leads to the door moving away from the frame into which the specified latch enters, despite the bolt-bolt being extended, since such bolt-bolts are characterized by excessively large gaps with the frame; and therefore, in the event of a fire, fireproof compounds will no longer be able to perform their function properly.

For example, EP 2584124 discloses a double-sided lock comprising a housing and a latch extendable at a central axis and provided with cylinder bores on both sides of this axis. In addition, it contains constipation, which can be rotated two turns and blocked using a comb that engages with a beard.

EP 2484851 describes a mortise lock for use in doors that open from right to left or left to right, comprising at least a movable latch; at least a movable deadbolt; the first and second movable rods moving in directions transverse to the direction of movement of the bolt and latch, between the unlocking position of the door, in which the first and second rods are retracted inside the housing, and the locking position of the door in which they exit the housing.

Summary of the present invention and its advantages

In view of the foregoing, the present invention relates to a fire door lock with a latch locking device comprising a deadbolt, which is connected to the pull bar and the thrust plate, and which is configured to move to the locked position in the horizontal direction and synchronously with these elements after actuation a leash located on the lock cylinder, avoiding contact between the drive arm of the pivot arm and the drive foot of the traction bar when pivoting Niya.

It is important to note that the deadbolt has the ability to deactivate the latch retraction mechanism due to the interaction between the pivot arm and the pull bar; however, both of these elements may or may not be provided with blocking protrusions.

Due to this configuration, moving the deadbolt to the lock position causes the pivot arm to rotate in the void and is unable to release the latch, since there is no contact between the pivot arm of the pivot arm and the drive foot of the pull bar. This eliminates the possible damage to any part of the internal mechanism of the lock at the time of applying excessive torque to the handle or the release of the latch, causing it to exit from its slot in the frame and the subsequent pressure drop in fireproof joints, which ensures insulation from fire.

Another distinctive feature of the present invention is that the deadbolt is characterized by the presence of a locking end configured to connect to the locking working surface of the latch, which prevents the removal of the specified latch in the locked position.

Due to the configuration of the deadbolt, the latch cannot be pulled out of its position by any persistent manipulations, for example, using a card or other object of this kind. Due to the action on the lock cylinder, the leash moves the thrust plate and the deadbolt as a single unit in the horizontal direction, moving this unit from the idle position, in which the latch can be retracted by acting on the pivot arm, to the locked position, in which the locking end of the deadbolt enters in contact with the working surface of the latch, preventing its withdrawal.

It should be noted that different versions of the deadbolt are allowed, and that it may or may not contain locking protrusions emerging from the door frame when the locking position is activated; in this case, both configurations provide for the possibility of preventing interaction between the pivot arm and the traction bar and, accordingly, the possibility of locking the latch.

Brief Description of the Figures

For a better understanding of the essence of the present invention, the accompanying drawings illustrate an embodiment for industrial use, which is purely illustrative and non-limiting.

In FIG. 1 is an isometric view of the lock (1) of a fire door with a latch (5) and a deadbolt (6) in the idle position.

In FIG. 2 is an isometric view of the lock (1) of the fire door with the deadbolt (6) in the inoperative position and the latch (5) that is retracted after acting on the pivot arm (2) when the door is opened.

In FIG. 3 is an isometric view of the lock (1) of the fire door with a deadbolt (6) extended to the locked position and a lockable latch (5).

In FIG. 4 is an isometric view of a fire door lock (1) with a deadbolt (6) extended to the locked position and a lockable latch (5), but with a locked hole passing through the pivot arm (2).

In FIG. 5a shows an isometric image of a deadbolt (6) with a blocking end (6a) and blocking protrusions (6b).

In FIG. 5b shows an isometric image of a deadbolt (6) with a blocking end (6a), but without blocking protrusions (6b).

In FIG. 6 is an isometric view of a latch (5).

In FIG. 7 is an isometric view of a thrust plate (8).

In FIG. 8 is an isometric view of the traction bar (7).

In FIG. 9 is an isometric view of a lever for actuating a latch (5).

In FIG. 10 is an isometric view of the pivot arm (2).

Detailed disclosure of one preferred embodiment of the present invention

The accompanying plans illustrate one of the preferred embodiments of the subject of the present invention, described in conjunction with the drawings using the item numbers listed below, which relates to a fire door lock provided with a deadbolt (6), which is connected to the pull bar (7) and resistant plate (8), and which is made with the possibility of moving to the locked position in the horizontal direction and synchronously with the specified elements after actuating the lead (13) located on the cylinder (12) of the lock, avoiding contact between the drive arm (2a) of the pivot arm (2) and the drive foot (7a) of the traction bar (7) when making a pivotal movement.

As shown in FIG. 1 and 2, if you act on the pivot arm (2) when the lock is in the idle position, the drive arm (2a) of this lever will come into contact with the drive tab (7a) of the traction bar (7), shifting it vertically. During this movement, the drive foot (7a) of the traction bar (7) will press the drive foot (4a) of the lever to actuate the latch (5), which will cause the latch (5) to move horizontally due to the pressure of the drive arm (4b) on U-shaped recess in the latch (5).

In FIG. Figures 3 and 4 show how, due to the actuation of the cylinder (12) of the lock, the leash (13) moves the deadbolt (6) to the locked position in the horizontal direction. In this position, the traction bar (7) and the thrust plate (8) connected to the deadbolt (6) synchronously move in the horizontal direction, avoiding contact between the drive arm (2a) of the pivot arm (2) and the drive foot (7a) traction bar (7) when making a rotary motion.

As you can see, in this position, the drive arm (2a) cannot interact with the drive tab (7a) of the traction bar (7), which prevents the latch (5) from retracting. This eliminates the possibility of damage to any part of the internal mechanism of the lock at the time of application of excessive torque by the handle or the release of the latch (5), causing the specified latch (5) to exit from its slot in the frame and the subsequent pressure drop in the fireproof connection, which ensures isolation from fire.

As seen in FIG. 3 and 4, another distinctive feature of the present invention is that due to the actuation of the cylinder (12), the leash (13) moves the deadbolt (6) in the horizontal direction, and the blocking end (ba) comes into contact with the blocking working surface (5b) of the latch (5), fixing it and preventing retraction.

This locking of the latch (5) ensures that the latch (5) cannot be retracted when an unauthorized attempt is made to open when the deadbolt (6) is in the locked position.

As shown in FIG. 5a and 5b, another distinguishing feature of the present invention is that two different versions of the deadbolt (6) are allowed: with or without blocking protrusions (6b).

Item Numbers

1. - Fire door lock

2. - Swivel lever

2a. - drive shoulder

3. - Return spring of the pivot arm (2)

4. - Lever for actuating the latches (5)

4a. - Drive foot

4b. - Drive lever arm (4)

5. - Latch

5a. - U-shaped notch

5b. - Blocking work surface

6. - Deadbolt

6a. - Blocking end face

6b. - Locking tabs

6s - notch

6d. - Central groove

7. - Traction bar

7a. - Drive foot

8. - Thrust plate

8a. - The protrusion of the thrust plate (8)

9. - Lock body

10. - The front plate of the castle

11. - Latch return spring (5)

12. - The cylinder of the castle

13. - Leash

14. - The central axis.

Claims (2)

1. Fire door lock with a latch lock device, which contains a housing (9) characterized by a central axis (14) of symmetry and the presence of equidistant openings for lock cylinders (12) made above and below the central axis (14) for use in doors, which open from right to left or from left to right, as well as the presence of a latch (5), which extends forward from the front plate (10) of the lock at the level of the central axis; wherein the latch lock device comprises a deadbolt (6), which is connected to the traction bar (7) and the thrust plate (8) and which is arranged to move to the locked latch position (5) in the horizontal direction and synchronously with these elements after reduction the action of the leash (13) located on the cylinder (12) of the lock, avoiding contact between the drive arm (2a) of the pivot arm (2) and the drive foot (7a) of the traction bar (7) when the pivot arm (2) rotates wherein said crossbar-z Aces (6) is configured to deactivate the latch retraction mechanism (5) due to the interaction between the rotary mechanism (2) and the traction bar (7), characterized in that in the inoperative position of the fire door lock (1), the traction bar (7) moves vertically when the drive arm (2a) of the pivot arm (2) comes into contact with the drive tab (7a) of the traction bar (7) by acting on the pivot arm (2). 2. The fire door lock with a latch lock device according to claim 1, where the deadbolt (6) is characterized by the presence of a blocking end (6a) configured to connect to the locking working surface (5b) of the latch (5), preventing the removal of the specified latch ( 5) in the locked position.

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