JPS592269Y2 - Emergency lock device - Google Patents

Description

[Detailed explanation of the invention] The smoke exhaust port is normally closed, but in the event of a fire or inspection, it must be opened as easily as possible by an electric signal, a pull cord, etc.

Fire doors are normally open, but in the event of a fire, they must be reliably closed using electric signals, pull cords, etc. even with a weak force.

However, even in normal times, the smoke exhaust vent cover can be opened by pulling it with strong force, and the fire door can be closed by pulling it with strong force, and even in these cases, the smoke exhaust vent cover can be pushed and the fire prevention door closed. It is often convenient to be able to reset the door by pushing it back.

This invention was developed to achieve the above purpose, and in an emergency, it operates reliably with a weak electric signal or a pull cord, but it also operates in normal times by applying a strong force that is set appropriately in advance. It also provides an emergency locking device that can be easily reset.

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 penetratingly pivotally mounted 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 right angles 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 in an arc 1.
2, 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 protruding slightly to the left in the center, and a tension spring 1 is attached to the frame plate 2.
7 always applies clockwise rotational force.

A locking arm 1B and a latch arm 19 are arranged in one direction around the latch plate 16.
The grooves 20 are parallel to each other and protrude, intersecting the U-shaped groove 3 at right angles when the lock is locked, as shown in FIG.

There is a notch 21 on the periphery of the latch plate 16 in the other direction, and the notch line 22 of the latch plate 16 is aligned with the radiation from the center of the shaft 15.
It is slightly tilted by α length in the locking rotation direction, which is the counterclockwise direction (counterclockwise in the figure) of 6.

The upper end of the upper arm 24 of the 1~guru link is pivotally connected to a shaft 23 protruding from the upper right side of the frame plate 2, and the lower end of the upper arm 24 is pivotally connected to the lower arm 25. There is always a force at work trying to bend it into a dogleg.

The right end of a lever 27 is pivotally attached to the lower end of the lower arm 25 of the toggle link, and a pin 2B is fixed to the left end of the lever 27 with the pin 2B protruding from both sides. It fits inside 29 and 30.

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

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 between the two, and a pin 28 of the lever 27 is pivotally mounted above the band plate 32.

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 logic 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.
7 and U principle 38, the door is firmly held even if clockwise rotational force is applied.

In this case, the toggle link is slightly bent into an inverted V-shape, and the bent part is held by the claw 14 of the push plate 10, preventing it from bending any further into the V-shape, so that the right end of the lever 27 does not shift upward. , at the left end, while pin 2B is in the long hole 30,
Due to the force of the compression spring 36, the door is firmly held without shifting upward and without the notches coming off.

In the event of an emergency such as a fire, the blade plate 5 is rotated manually or by an electric signal, etc., 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 27, the toggle link works lightly, and the right end of the lever 27 escapes upward, causing the notches to separate and the latch plate 16 to rotate clockwise.
Principle 38 is opened and the door is also opened.

Next, when you want to open it as necessary even in normal times, the cut line 22 of the notch 21 is inclined slightly α length with respect to the radiation from the center of the shaft 15 as shown in FIG. 3, so as shown in FIG. When a strong force is applied to the door, a strong clockwise rotational force is applied to the latch plate 16 through the U mechanism 38, and the left end of the lever 27 is pushed up against the compression spring 36, causing the notches to separate and the latch plate 16 to rotate. The door will be 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 re-setting 1, close the door and the U mechanism 38 will push the locking arm 18 of the latch plate 16, so the latch plate 16 will rotate counterclockwise and the notches will engage, as shown in Figure 3. It returns to the locked state.

As mentioned above, the emergency lock device according to the present invention can be easily provided at a low cost because the board 1 and the frame plate 2 are assembled into a simple structure and are fastened together with screws.・Since it uses a link, it can be operated with a small amount of force, but there are fewer malfunctions during normal times, and it has the advantage of being able to be opened manually even during normal times, and the force can be adjusted freely. It can be used for various purposes such as ducts and air supply/exhaust ducts.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the board, Fig. 2 is a plan view of the board, Fig. 3 is a plan view of the frame plate showing the locked state in normal times, and Fig.
The figure is an explanatory diagram of the operation of the frame plate, showing the state in which the door is opened by an electric signal, etc., and FIG. 1... Board, 2... Frame board, 3...
...U-shaped groove, 10...Press plate, 13...
Arm, 16...Latch plate, 1B...
Lock arm, 19... Latch arm, 20...
groove, 21...notch, 22...cut line,
24... Toggle link upper arm, 25...
・Lower arm of toggle link, 27... Lever, 31
...Notch, 32... Band plate, 34...
...Front hole, 35...Adjustment screw, 29°30
...long hole, 36...compression spiral,
37...Kaku Nando.

Claims (1)

[Scope of Claim for Utility Model Registration] A latch plate is rotatably supported on a frame plate, and a latch arm for locking a U-half ring of a door, etc. is protruded from a part of the upper periphery of the latch plate, and a latch arm for locking a U-half ring of a door, etc. is provided protrudingly from the upper part of the periphery of the latch plate. One end of the toggle link is pivotally connected to one end of the lever, which has a notch in the direction, and a notch in the middle that engages with the notch of the latch plate, and the other end is pivotally connected to the frame plate, and the center of the toggle link is In a device configured such that the lever can be struck by a member actuated by an electric signal, a pull cord, etc., a pin fixed to the other end of the lever is inserted into a long hole provided in the frame plate, and is movable with respect to the frame plate. The latch plate is pivoted to one end of a strip plate, the other end of the strip plate is supported on a frame plate via a spring whose compression force is adjusted by an adjustment screw, and the cut line where the notch provided in the latch plate and the lever touch is An emergency locking device characterized in that the latch plate is slightly inclined in the direction of locking rotation relative to the radiation from the center of the latch plate axis.