JPS5845414Y2 - Emergency lock device - Google Patents

Description

[Detailed description of the invention] This invention is designed to close the fire door or open the smoke exhaust vent by unlocking the fire door or smoke exhaust vent that is locked during normal times using an electric signal or a pull cord in an emergency. The present invention relates to a device that does this.

Generally, this type of locking device locks the fire door to hold it in the open position during normal times, and locks the lid of the smoke exhaust port to the closed position. It must be possible to prevent the lock from coming off even if a certain amount of weak force is applied or the lock is applied.
On the other hand, in an emergency, the lock must be released with a light force by actuating the lunoid using an electric signal or by pulling the cord.

Moreover, when installed, it is often embedded in a wall or the like, and miniaturization is desired.

The present invention was developed with a focus on this point, and uses a simple link mechanism to securely hold the lock in normal times, and in an emergency, to release the lock by applying a light force. The purpose of the present invention is to provide a compact emergency locking device.

That is, according to the present invention, under normal conditions, when the latch plate is rotated with the U-type provided on the door etc. fitted, the latch plate engages with the retaining portion formed on the latch plate and rotates. A locking mechanism that prevents the movement of the latch plate and releases the lock with the latch plate by actuation by an electric signal or a pull cord in an emergency is provided by a lever member equipped with a locking pawl that locks the latch plate, and this lever. A toggle link consisting of a pair of arm members connected to a floating fulcrum of a lever member, and an urging member that urges the central fulcrum of the toggle link to move beyond the link dead center to a position opposite to the lever lever member. A biasing member is provided, and the latch plate is arranged between the fixed side fulcrum and the floating side fulcrum of the lever lever member.
An emergency locking device is provided, characterized in that a locking pawl is engaged with a retaining portion of a latch plate formed on a side substantially opposite to the side where the locking mechanism is fitted.

Next, the configuration of the emergency lock device of the present invention will be explained.
The main body has a box shape made up of a substrate 1 and a frame plate 2, and a U-shaped groove 3 is opened at the center and side surfaces.

The substrate 1 shown in FIGS. 1 and 2 has a U-shaped groove 3 in the center part.
A shaft 4 is pivotally mounted through the shaft at a position slightly below the main body, and a windmill-shaped blade plate 5 is fixed to the outside of the main body at one end thereof, and the blade plate 5 and the substrate 1
A helical spring 6 is wound around the shaft 4 between.

At the other end of the shaft 4, a lock-shaped arm plate 8 with an arm 7 protruding in one direction of the disc and a large diameter washer 9 are fixed with screws, and a helical spring 6 is attached to this arm plate 8. A counterclockwise rotational force is constantly applied.

A push plate 10 made of a sheet metal slightly thinner than the arm plate 8
A hole 11 is bored in the center of the hole, and the shape of the hole is, as shown in FIG.
The top and bottom of the holes are large enough to easily fit the arm plate.

An arm 13 protrudes to the right of the push plate 10, and its tip is bent at a right angle to form a claw 14. Rotation of the vane plate 5, and therefore clockwise rotation of the arm plate, causes the arm 7 to move into an arc 12.
In order to press , the push plate and therefore the pawl 14 move to the left.

As shown in FIG. 3, on the frame plate 2, a latch plate 16 is pivotally attached to a shaft 15 that protrudes slightly to the left in the center part, and a tension spring 17 is attached to the frame plate 2.
A clockwise rotational force is always applied.

A locking arm 18 and a latch arm 19 are arranged in one direction around the latch plate 16.
The latch portion is formed by protruding in parallel to form a groove 20, which intersects the U-shaped groove 3 at right angles when locked, as shown in FIG.

A notch 2 serving as an engagement receiving portion is provided around the latch plate 16 in the other direction.
1, and its score line 22 is slightly inclined by α length with respect to the radiation from the center of the shaft 15.

The upper end of an upper arm 24, which is one arm member of the toggle link, is pivotally connected to a shaft 23 (fixed fulcrum) protruding from the upper right side of the frame plate 2, and its lower end is pivotally connected to a lower arm 25, which is the other arm member. The spring 26 acting as a biasing member constantly exerts a force on the toggle link to bend it into a dogleg shape, that is, to move the toggle link beyond its dead center to the right position.

The right end (floating fulcrum) of a lever lever 27 as a member of the lever lever is pivotally attached to the lower end of the lower arm 25 of the toggle link, and the pin 28 (fixed side fulcrum) is fixed to the left end thereof in a state protruding from both sides. It fits into long holes 29 and 30 formed in the frame plate 2 and the substrate 1.

A notch 31 is formed at a position considerably to the left of the center of the lever lever 27.

On the left side of the frame plate 2, there is a strip plate 32 running vertically, and its lower end is bent to form a hole 33, and an adjustment screw 35 is inserted through the hole 34 of the frame plate, and a compression spring 36 is inserted.
A square nut 37 of a size that cannot be rotated is screwed into the band plate 32 by sandwiching the band plate 32, and a pin 28 of a lever lever 27 is pivotally mounted above the band plate 32.

FIG. 4 shows the locking mechanism of the present invention shown in FIG. 3, and its link configuration is shown in solid lines, including a link 11 consisting of a lever lever 27 and a link 12 forming a toggle link.
, 13, and the fixed side fulcrum of link 11 (pin 28)
is loosely fitted into the elongated hole 29 and serves as a movable fulcrum, and
The central fulcrum of the toggle link (link 1 2 13) is moved by the force of the spring 26 to a position on the opposite side of the link 11 beyond the tread point of the toggle link so as to maintain the locked state. If we apply a deviation that moves this center fulcrum to the left side of arrow A, the toggle link will move in a dogleg shape and link 11
is pulled up as shown by arrow B, and the lock by the notch 31 is released.

The force required to be applied to the central fulcrum of the toggle link to release the lock is light, and the amount of displacement thereof may be small.

Next, the operation of this emergency lock will be explained. First, taking a fire door as an example, FIG. 3 shows the normally locked state.

The U half ring 38 fixed to the door is attached to the latch arm 19 in the U-shaped groove 3.
is supported by

The notch 31 of the lever 27 is caught in the notch 21 of the latch plate 16, and the lever 27 cannot move to the left because the pin 28 is inserted into the elongated hole 30. To firmly hold a door even if clockwise rotational force is applied by 38.

In this case, the toggle link is slightly bent into a reverse V-shape, and the bent portion is pressed by the claw 14 of the push plate 10, preventing it from bending any further into a V-shape, thereby preventing the right end of the lever lever 27 from shifting upward. Although the left end pin 28 is in the elongated hole 30, it does not shift upward due to the force of the compression spring 36, and the door is held firmly without the notches coming off.

In the event of an emergency such as a fire, the blade plate 5 is rotated by a manual or electric signal as shown in FIG. 10 moves to the left, and the claw 14 also moves to the left, so that the toggle link is bent into a dogleg shape.

Since the notch 21 is located far to the left of the center of the lever lever 27, the toggle link works lightly, and the right end of the lever lever 27 escapes upward, causing the notches to separate and the latch plate 16 to rotate clockwise, opening the U-shaped source 38. The door will also be opened.

Next, even in normal times, when it is opened as necessary, the cut line 22 of the notch 21 is inclined by a slight length α with respect to the radiation from the center of the shaft 15, as shown in FIG. 3, so as shown in FIG. If strong force is applied to the door, the latch plate 1 will be released through the U-shaped source 38.
6 is applied with a strong clockwise rotational force, the left side of the lever 27 is pushed up against the compression spring 36, the notches are separated, the latch plate 16 is rotated, and the door is opened.

Since this opening force changes depending on the size of the angle α and the strength of the compression spring 36, the force required to open the door can be set in advance by adjusting the adjusting screw 35.

Once opened, when resetting the door, close the door and the U-shaped source 38 will push the locking arm 18 of the latch plate 16, so the latch plate 1
6 rotates counterclockwise so that the notches engage with each other and return to the locked state shown in FIG.

As explained above, the emergency locking device according to the present invention has a locking part that locks the rotation of the latch plate, and the central fulcrum of the toggle link connected to one end of the lever lever is moved to a position on the opposite side of the lever beyond the tied point. By providing a means for urging the lock to move, it is possible to reliably release the lock with a small amount of force, and in the locked state, the lock will be released even if the knob is applied from the outside or a certain amount of pulling force is applied. This is not the case, and for this reason, the effect that there is almost no malfunction during normal times can be obtained.

In addition, in order to reduce the operating force, even if the lever member is lengthened, the latch plate having the retaining portion on the opposite side to the U-principal fitting side is engaged, and the latch plate is attached to the lever lever. Since it is placed between the fixed side fulcrum and floating fulcrum of one member,
The overall structure can be made compact without taking up too much depth, the locking device can be made smaller, and it can be easily embedded.

Of course, the locking device of the present invention can be used not only for fire doors and smoke vents, but also for
It can be used in various closed applications such as supply and exhaust ducts.

[Brief explanation of drawings]

The drawings are: Figure 1 is a cross-sectional view of the board, Figure 2 is a plan view of the board,
Fig. 3 is a plan view of the locked state in normal times, Fig. 4 is an explanatory diagram of the link mechanism in Fig. 3, Fig. 5 is a plan view of the door opened by an electric signal, etc., and Fig. 6 is a plan view of the door in the locked state. It is an operation explanatory diagram showing a state in which it is pushed and released. 5... Feather plate, 8... Arm plate, 10
...Press plate, 16...Latch plate, 27.
...Pry lever, 32...Strip plate.

Claims (1)

[Scope of Utility Model Registration Claim] When the latch plate is rotated by fitting the U-shaped panel provided on the door etc., it engages with the engagement receiving part formed on the latch plate and prevents the latch plate from rotating. However, in an emergency locking device equipped with a locking mechanism that releases the locking with the latch plate by actuation by an electric signal or a pull string, the locking mechanism supports the fixed side fulcrum on the frame plate and also locks the latch. A toggle link consisting of a lever lever member equipped with a locking pawl for locking a plate, a pair of arm members connecting the lever lever member to a floating fulcrum, and a lever that moves the central fulcrum of the toggle link beyond the link fulcrum. A biasing member is provided that biases the lever member to move to a position opposite to the lever member, and the latch plate is arranged between the fixed side fulcrum and the floating side fulcrum of the lever lever member. An emergency locking device characterized in that the locking pawl is locked by a locking receiving portion of a latch plate formed on a side substantially opposite to a fitting side.