JPH09324590A - Manual operation device for releasing brake in shutter for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify construction and achieve a compact construction by reducing the number of parts of a manual operation device for releasing a brake. SOLUTION: In the manual operation device for releasing a brake, a brake device is released or actuated based on the movement of a wire 15 interconnecting a brake releasing device and the manual operation device. In this case, a bent part 22c of the lower end of an inner lever 22 of the manual operation device, to which the wire 15 is connected, is received so as to be pressed against an inner frame bottom surface 20a opposed to the bottom surface of an operation box, when a brake is applied, and when the wire moves upward to the side of releasing a brake, the part 22c is slidably guided by the inner frame bottom surface 20a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a manual operation device for releasing a brake in a building shutter installed in an opening or the like of a building.

[0002]

2. Description of the Related Art In general, among building shutters, there are self-weighting type shutters such as fireproof and smokeproof shutters installed in buildings and the like. The solenoid of the brake release device (automatic closing device) is operated to automatically release the brake to close the shutter curtain by its own weight. In such a device, there is a device which is provided with a manual operation device linked to the brake release device so that the brake can be manually released. For example, it is disclosed in Japanese Utility Model Publication No. 8-10160. ,
The wire urged to release the braking means is connected to the lower end of the locking lever that constitutes the manual operation device, and the lower end of the locking lever is moved upward to loosen the wire.
The brake is thereby released.

[0003]

[Problems to be Solved by the Invention]
The upward movement of the lower end of the locking lever is performed by providing a locking roller in the intermediate portion of the locking lever, and the locking roller is moved and guided by a guide elongated hole formed in the inner frame. The lock of the stop lever in the brake braking posture is achieved by engaging the locking portion formed at the lower end of the guide elongated hole in the state of resisting the biasing force of the wire that is biased to release the locking roller. Has been done. Then, in order to release the locking lever in order to release the brake from the locked state, an operating plate whose tip contacts the locking roller is provided, and the operating plate is swung to swing the locking roller. Therefore, there is a problem that the number of parts is inevitably increased and the structure is complicated, assembly is inferior, and initial adjustment is troublesome. However, there is a problem that the operation box for this purpose becomes large. Further, in this device, the lower end of the locking lever to which the wire is connected is guided by the guide elongated hole, so that the wire connecting operation and the length adjustment are practically impossible in the guide state. In addition, the return lever is positioned by a pin so as to be flush with the front surface of the operation box, and there is a problem that the number of parts is further increased. Therefore, there is a problem to be solved by the present invention. there were.

[0004]

The present invention has been made in view of the above circumstances in order to solve these problems, and is a self-weighted shutter curtain for opening and closing a skeleton opening. A manual operating device for manually releasing the braking means for closing the brake of the operating box, the operating device being provided in the operating box so that the operating box can be rocked and transformed between a braking posture and a releasing posture. An operation lever whose one end side is pivotally supported, a locking means which can be engaged with and disengaged from the operation lever to lock the operation lever in a braking posture, and one end which is pivotally movable to an intermediate portion of the operation lever. When the connecting wire pivotally supported and urged to release the braking means is provided with the inner lever connected to the other end side, the operation box side bottom surface is operated by the operating lever by the locking means. In the locked state, the other end of the inner lever, which receives the urging force from the connecting wire and tries to move to the brake release side, is received and supported, and to the brake release side of the inner lever linked to the unlocking of the operation lever. It is configured as a member that serves as a sliding guide.
As a result, the present invention can reduce the number of parts of the manual operation device, simplify the structure, and improve the assembling property.

[0005]

FIG. 1 shows an embodiment of the present invention.
~ It demonstrates based on the drawing of FIG. In the drawings, reference numeral 1 is a shutter curtain of a fireproof shutter provided in a building or the like, and the shutter curtain 1 is normally moved up and down based on forward and reverse rotations of a winding drum 3 accompanied by driving of an opening / closing machine 2. The opening and closing of the opening is performed by the brake releasing device 4 which will be described later to release a brake device (not shown) installed in the opening and closing device 2 to close the opening by its own weight. All of the configurations are conventional.

The brake release device 4 is integrally attached to the lower surface of the switchgear 2, and a brake release lever 6 projecting from the switchgear 2 side is inserted into the casing 5 so as to be movable left and right. A first support shaft 7 is laterally provided in the casing 5, and a first slide piece 8 connected to the brake release lever 6 is slidably fitted on the support shaft 7. The slide piece 8 moves between a release position where the brake release lever 6 is located on the side where the brake release operation is performed and a braking position where the brake release lever 6 is located on the side where the brake braking operation is performed. It is urged toward the release position side by the first bullet 9 wound around the support shaft 7. Further, a second support shaft 10 is laterally provided in the casing 5 in parallel with the first support shaft 7, and a second slide piece 11 is externally fitted therein,
It is urged by the second bullet 12 in the same direction as the first slide piece 8. Furthermore, the second slide piece 11
A locking plate 13 is swingably supported on the upper end of the
A lock portion 13a that engages with the engagement portion 8a of the first slide piece 8 is formed on the upper surface thereof.

The second slide piece 11 has a wire 1 whose tip is connected to a manual operating device 16 described later.
5 is integrally fixed at its base end, and the wire 15
Is held in a tensioned state in which the second slide piece 11 is pulled against the urging force of the second bullet machine 12,
3a is set to hold the first slide piece 8 at the braking position by being locked to the locking portion 8a, while the second bullet 1 is operated by operating the manual operation device 16 as described later.
When the wire 15 is moved while receiving the urging force of 2,
The first slide piece 8 is set so as to move to the release position as the second slide piece 11 moves.

Incidentally, the locking plate 13 pivotally supported by the second slide piece 11 is formed with a long hole 13b in the left-right direction, and the long hole 13b has a fire caused by a smoke detector or the like. Plunger 14 of solenoid 14 that operates upon detection
a is movably connected, and when the plunger 14a moves downward based on the operation of the solenoid 14, the locking plate 13
Is rocked downward to unlock the locking portion 8a and the locking portion 13a, whereby the first slide piece 8 is displaced to the release position and the brake release lever 6 is set to release the brake. In this way, the brake release device 4 can be released based on the abnormality detection of the fire detector or the like.

The manual operation device 16 is a device for manually releasing the brake device so that the shutter curtain 1 is closed by its own weight. The manual operation device 16 employed in the present embodiment is the shutter curtain. A push-button type operation switch 17 for controlling the opening, stopping, and closing of 1 is arranged in an operation box 18 provided on the body. That is, the operation box 18 is formed with a lockable lid 18a whose front surface can be opened and closed except for one side, and the operation switch 17 and a lock described later are provided in the box covered by the lid 18a. A push button 19 for releasing the means 23 is provided above and below. By the way, the lid 18
The part facing the push button 19 of a is a window 18 that can be crushed
It is formed in b and is configured to be able to be pushed in an emergency without opening the lid 18a.

On the other hand, on the one side of the operation box 18,
An inner frame 20 having a substantially square cross section with a bottom surface 20a is integrally provided, and the operation lever 2 is provided on the upper portion of the inner frame 20.
One end (the upper end in FIG. 3A) of 1 is the pin shaft 21.
It is pivotally supported via a. The operation lever 21 swings around the pin shaft 21a as a fulcrum, and is stored in the operation box 18 (brake braking posture).
Is set so that the lower end of the operation box is changed to a projecting position (brake releasing position) projecting from the operation box 18 to the front side. Further, one end portion (an upper end portion in FIG. 3A) of the inner lever 22 is swingably and pivotally supported at an intermediate portion of the operation lever 21 via a connecting shaft 22a, and the operation lever 21 swings. The other end (Fig.
The lower end side in (A) is set to swing. And the mounting hole 22 is provided on the other end side of the inner lever 22.
b, the tip of the wire 15 is integrally connected to the mounting hole 22b.
Is inserted into the box through an insertion hole 18c formed in the upper surface of the operation box 18.

By the way, the push button 19 has a base end portion 19
a is adapted to be projected into and retracted from the lock means 23 provided on the bottom surface of the box, and the base end portion 19a is formed with a notched guide side 19b. On the other hand, the lock means 23 biases the lock body 23a whose front end faces the operation lever 21 side, the case body 23b which stores the lock body 23a so that the lock body 23a can move forward and backward, and the front end of the lock body 23a to advance. It is composed of a bullet 23c. Further, an engaging portion 23d that engages with the guide side 19b is provided at the base end portion of the lock body 23a, and the push button 19
By the pushing operation of, the guide side 19b pushes the engaging portion 23d toward the proximal end side against the biasing force of the biasing ammunition 23c, whereby the tip end of the lock body 23a is set to retract. The tip end of the lock body 23a is set so as to engage with a locking hole 21b formed in the lower end portion of the operation lever 21 located in the storage posture in the inoperative state without the pushing operation. When the push operation of the button 19 is performed, the lock body 23a is retracted and the engagement with the operation lever 21 is released. still,
Reference numeral 20b is a through hole formed in the inner frame 20, and is set so that the tip portion of the lock body 23a penetrates.

Then, the manual operating device 16 is
That is, with the operation lever 21 locked in the stored posture, the second slide piece 11 is moved to the second bullet 12
The wire 15 is connected so as to be in a braking state in which the brake release lever 6 is braked so as to be pulled against the urging force of the inner lever 22. In this state, the other end of the inner lever 22 is pulled upward by the second bullet 12. Therefore, the load is applied in the direction of pushing out the intermediate portion of the operation lever 21,
The load is restricted by the operation lever 21 being locked by the lock body 23a, and at this time, the L-shaped bent portion 22c at the other end of the inner lever 22 is pressed against the inner frame bottom surface 20a. It is set to be received and supported in the state. Then, when the push button 19 is pressed to release the lock of the operation lever 21, the operation lever 21 is pushed out by the load in the pushing direction by the inner lever 22 and protrudes to be transformed into a positive shape. The wire 15 is designed to move upward,
As described above, the movement of the wire 15 moves the first slide piece 8 to the release position and the brake release lever 6 is released on the brake release device 4 side. At this time, the bent portion of the inner lever 22 is moved. 22c is set to slide and move upward while being guided by the inner frame bottom surface 20a.

Here, the wire 15 is connected to the inner lever 22.
When connecting the inner lever 20, the wire 15 is connected via a guide roller 20b provided on the side of the inner frame 20. When the push button 19 is pushed, the operating lever 21 is smoothly transformed into the protruding posture. Incidentally, 15a is an outer wire to which the wire 15 exposed to the outside is fitted.

On the other hand, in order to return from the state where the brake is released by the manual operation device 16 to the original state, the lower end portion of the operation lever 21 which is transformed into the projecting posture is pushed into the inner frame 20 to urge it. The lock body 23a protruding by the ammunition 23c automatically engages with the locking hole 21b of the operation lever 21, whereby the operation lever 2
The brake release device 4 can be returned to the brake braking state by locking 1 in the stored posture.

In the embodiment of the present invention configured as described above, when it is desired to close the shutter curtain 1 urgently, the push button 19 of the manual operation device 16 may be pressed, and as described above. On the wire 1
Based on the upward movement of 5 the brake release device 4
Second slide piece 11 moves the first slide piece 8 to the release position, which causes the brake release lever 6
Releases the brake device, and the shutter curtain 1 is closed by its own weight. And in this case, the inner lever 22 to which the upwardly moving wire 15 is connected is
In the stored posture of the operation lever 21 corresponding to the braking state, the bent portion 22c is received and supported while being pressed against the inner frame bottom surface 20a corresponding to the bottom surface of the operation box 18, and the brake release device 4 is supported. When the brake is released, the inner lever bent portion 22c, which moves upward with the upward movement of the wire 15, moves upward while being slidably guided by the inner frame bottom surface 20a. As a result, the bottom surface of the operation box 18 that constitutes the manual operation device 16 is effectively used to form a long hole for upwardly guiding the locking lever (corresponding to the inner lever 22 of the present invention) like the conventional one. Since it is not necessary to separately provide it, the number of parts can be reduced and the structure can be simplified.

Further, in this structure, the operation lever 21 is locked so that the upward movement of the inner lever 22 is restricted. Therefore, the operation lever 2 is used as a locking means.
It suffices to lock-unlock only 1, and as a result, no special means for locking the locking lever and no member for unlocking this are required, not only simplifying the structure but also manually operating the device 16. Can be made compact.

Further, in this structure, the inner lever 22
Since the lower end of the operation lever 21 is free,
The wire 15 and the inner lever 2
The connecting part with 2 can be exposed, and in this state the connecting work and the length adjusting work of the wire 15 can be performed from the outside, and the assembling property can be improved. Furthermore, the operating lever 21
Positioning of the inner frame 20 with respect to the front-rear direction is performed by the pin shaft 21a and the lock body 2 which are necessary for constructing the manual operation device 16.
3a, it is not necessary to separately provide a pin for positioning the return lever, unlike the conventional one.
The front surface of the operation lever 21 and the front surface of the operation box 18 can be set flush with each other.

[Brief description of drawings]

FIG. 1 is a schematic explanatory perspective view of a fire prevention shutter.

FIG. 2 is an inner plan view of a brake release device.

FIG. 3 is a side sectional view of a manual operation device.

FIG. 4 is a partially cutaway front view of the manual operation device.

FIG. 5 is a side view of the manual operation device.

6A and 6B are an explanatory side cross-sectional view and a plan cross-sectional view of a main part, respectively.

7A and 7B are a side sectional view and a front view of an operating lever, respectively.

8A and 8B are a side view and a front view of an inner lever, respectively.

9A and 9B are a side sectional view and a front view of an inner frame, respectively.

10 (A), (B), and (C) are a front view, a partially cutaway plan view, and a side view of a locking means, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Opener 4 Brake release device 5 Casing 6 Brake release lever 7 1st support shaft 8 1st slide piece 9 1st bullet 11 11 2nd slide piece 12 2nd bullet 13 Locking plate 14 Solenoid 15 Wire 16 Manual operation device 17 Operation switch 18 Operation box 19 Push button 20 Inner frame 21 Operation lever 22 Inner lever 23 Locking means 23a Lock body

Claims (1)

[Claims] 1. A manual operating device for manually releasing brake means for closing and braking a self-weighting shutter curtain for opening and closing a frame opening, the manual operating device comprising an operating box and a braking device. An operating lever whose one end is pivotally supported by the operating box so that it can be swung between the posture and the released posture, and the operating lever is locked in a detachable manner to lock the operating lever in the braking posture. Lock means, and an inner lever having one end pivotably supported by an intermediate portion of the operation lever and a connecting wire urged to release the brake means connected to the other end. When the operation box is locked by the locking means, the other end of the inner lever, which is about to move to the brake release side by receiving the urging force from the connecting wire. A manual operation device for releasing a brake in a building shutter configured as a member for receiving and supporting and slidingly guiding an inner lever linked to unlocking of an operation lever toward a brake release side.