JP3385406B2 - Shutter switch control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical shutter opening / closing control device that does not use electricity.

[0002]

2. Description of the Related Art In many cases, a shutter is attached to shield a frontage, and when a fire occurs, the shutter can detect smoke and descend by itself so that the frontage can be closed. There is. For example, if the brake is released in response to an electric signal from a smoke detector, the take-up shaft rotates due to the weight of the shutter, the shutter can descend, and when the floor surface is reached (bottom dead center). The limit switch detects the movement of the seat plate at the bottom edge of the shutter and resets the brake.

By the way, when a fire occurs, all the shutters must be lowered, and in a large building, many shutters must be lowered at the same time, and the brakes must be restored almost at the same time to stop. . Therefore, the electric capacity becomes insufficient, which causes a situation in which the shutter does not descend and the descended shutter cannot be stopped at the bottom dead center. In addition, even if the brake is released at the same time as the fire occurs and the shutter falls by its own weight, there are cases where it cannot stop at bottom dead center due to a trouble during the descent.

[0004]

As described above, the conventional shutter opening / closing control device has the above-mentioned problems. The problem to be solved by the present invention is this problem, and it provides a reliable control device for a shutter opening / closing device that is mechanically configured, rather than electrically controlled.

[0005]

A control device for a shutter opening and closing device according to the present invention operates a solenoid in response to a signal from a smoke detector, and if a closing cam is opened, a brake lever is pushed and a brake is opened. To be done. Therefore, the shutter descends due to its own weight, the disk rotates due to the rotation of the winding shaft accompanying the shutter descending, and the pin attached to the outer periphery of the disk hits the stop trigger lever to press one end.

The stop trigger lever is locked to the return lever, but if the pin hits the stop trigger lever and releases the return lever, the pin slides by the spring force, and as a result, the closing cam is returned to its original position. Return to position. Then, the brake lever returns and the brake operates, the rotation of the winding shaft stops, and the descent of the shutter stops. Therefore, when the shutter reaches the floor surface, the rotation angle of the pin attached to the outer peripheral portion of the disk is determined so that the brake lever returns.

When the shutter is raised by the normal operation, the disk rotates in conjunction with the winding shaft, and the return-to-origin claws attached to the outer circumference of the disk move the return lever backward. , The disengaged trigger lever is locked to the return lever. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment showing a shutter equipped with a switch control device according to the present invention. The shutter 1 can be moved up and down by being wound or unwound on a winding shaft 2 attached to the upper part of the frontage, and guide rails 3 and 3 for guiding the shutter 1 are provided on both sides of the frontage. It is set up.

FIG. 2 is an external view showing the shutter opening / closing control device 10 of the present invention. The motor 4 is provided with a speed reducer 5, and the shutter opening / closing control device 10 is attached to this opening / closing device. . A sprocket 6 and a gear 7 are attached to the main shaft of the speed reducer 5, the gear 7 meshes with an intermediate gear 8, and the intermediate gear 8 meshes with a transmission gear 11 serving as a drive source of the shutter opening / closing controller 10. The sprocket 6 can rotate the sprocket of the winding shaft 2 via the chain 9.

The gear 7 rotates a transmission gear 11 with an intermediate gear 8 interposed therebetween, and the transmission gear 11 serves as a drive source of the shutter opening / closing machine control device 10. Therefore, the transmission gear 11 rotates with the rotation of the winding shaft 2 and can drive the shutter opening / closing device control apparatus 10. Figure 3,
FIG. 4 is a specific example showing the structure of the shutter opening / closing device control device 10, which will be described based on the operation.

Lead wire 1 extending from a smoke detector (not shown)
2 is connected to the solenoid 13 and supplied with DC 24V. The plunger 14 projects from the solenoid 13,
The plunger 14 can move in the direction of arrow A, and a trigger lever 15 is connected to the plunger 14. When the solenoid 13 is energized and the plunger 14 moves (reverses) in the direction A, the trigger lever 1
5 swings around a shaft 16.

The roller 17 attached to the tip of the trigger lever is disengaged from the groove formed in the closing cam 18,
The closing cam 18 is moved by an arrow B by the spring force of the coil spring 19.
Direction and release the brake of the switch. That is, the closing cam 18 projects in the direction of arrow B to push the brake lever 20 to release the brake.

When the closing cam 18 is actuated, the switch cam 21 also moves in the direction of arrow B, the self-shielding microswitch 22 becomes free, the voltage DC24V supplied to the solenoid 13 is cut off, and the operation confirmation signal is sent. Is returned to the interlocking controller. When the brake is released, the shutter 1 descends due to its own weight, and as a result, the transmission gear 11 rotates and the disc 24 passes through the worm gear 23.
Rotates in the direction of arrow C.

Then, the pin 25 attached to the outer peripheral portion of the disk 24 hits the stop trigger lever 26, and the stop trigger lever 26 swings about the shaft 27.
Here, when the pin 25 hits the stop trigger lever 26, the shutter 1 is adjusted in advance so that the shutter 1 approaches or hits the floor surface. The roller 28 pivotally supported at the tip of the stop trigger lever 26 is disengaged from the stop cam 29 formed on the return lever 33, and the return lever 33 is moved in the direction of arrow D by the spring force of the coil spring 30. 31
To retract the closing cam 18 returns to its pre-actuated position. Then, the brake of the opening / closing device is restored and the descent of the shutter 1 is stopped.

The controller shown in FIG. 3 is in a state of normal operation, in which the roller 17 of the trigger lever 15 fits into the groove formed in the closing cam 18, stands up from the closing cam 18, and stands up from the intermediate pin 31. Is formed on the return lever 33 to form the long groove 3
Although it is located at the right end of 4, the intermediate pin 31 is located at the left end of the long groove 34 when the closing cam 18 is moved in the B direction by the swing of the trigger lever 15 and the brake is in the open state. . Therefore, if the return lever 33 moves in the D direction by the action of the spring force of the coil spring 30, the intermediate pin 3
1 is pulled and the closing cam 18 also moves in the D direction.

FIG. 5 is a perspective view showing the relationship between the disk 24, the pin 25, the stop trigger lever 26, and the return lever 33 in an easy-to-understand manner. When the disk 24 rotates counterclockwise, the pin 25 moves to the lever 3 of the stop trigger lever 26.
Upon hitting 5, the stop trigger lever 26 swings around the shaft 27. Therefore, the tip roller 28 comes out of the stop cam 29 of the return lever 33.

FIG. 5 (b) shows the return lever 33, which is made of a plate material and is provided with a stopping cam 29 projecting in a triangular shape at one end thereof. Here, the lever 35 of the stop trigger lever 26 is pivotally supported by the pin, but one side is supported by the stopper screw 36 so that the disc 24 does not rotate even if it is pressed by the pin 25. Has become.

On the other hand, the control device of the present invention includes a solenoid 13
If the shutter does not operate, the lever 37 can be operated to push up the plunger 14 in the direction of the arrow A by hand. After that, the control device operates in the same manner as described above to operate the shutter 1
Can be lowered and stopped at the lower limit. Then, in order to return the shutter open / close controller 10 to the original state, the shutter 1 may be raised.

That is, when the shutter 1 rises, the transmission gear 11 rotates and the worm gear 23 causes the disk 24 to move.
Turns in the direction of arrow E. The origin return lever 32 attached to the outer peripheral portion of the disk hits the notch 38 of the return lever 33 and presses it in the direction of arrow B, and the tip roller 28 of the stop trigger lever 26 engages with the stop cam 29. Then it is returned to the position before operation.

As described above, the switchgear control device of the present invention is constituted by a mechanism that operates in conjunction with the movement of the shutter, and the following effects can be obtained.

[0021]

The control device for the shutter opening / closing device according to the present invention uses a mechanism, and is a highly reliable device that can surely operate and lower the shutter even if a fire occurs. Is. Then, when the shutter reaches the bottom dead center, the brake can be operated to accurately stop the shutter. If the shutter is further raised, the control device can return to the original state.

[Brief description of drawings]

FIG. 1 is an overall external view of a shutter device.

FIG. 2 is a switchgear provided with the control device of the present invention.

FIG. 3 is a structure of a control device of the present invention.

FIG. 4 is a structure of a control device according to the present invention.

5A is a relationship between a pin attached to a disc, a stop trigger lever, and a return lever, and FIG. 5B is a return lever.

[Explanation of symbols]

1 shutter 2 winding shaft 3 guide rails 4 motor 5 reducer 6 sprockets 7 gears 8 intermediate gear 9 chains 10 Shutter open / close controller 11 Transmission gear 12 lead wire 13 solenoid 14 Plunger 15 Trigger lever 16 axes 17 Roller 18 closed cam 19 coil spring 20 Brake lever 21 switch cam 22 Self-shielding micro switch 23 Worm Gear 24 discs 25 pin 26 Trigger lever for stopping 27 axes 28 Tip roller 29 Stopping cam 30 coil spring 31 Middle pin 32 Home return lever 33 Return lever 34 long groove 35 lever 36 Stopper screw 37 lever 38 notches

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Claims (2)

(57) [Claims] 1. A shutter opening / closing controller for controlling a shutter to be lowered by itself when a fire occurs and to be stopped at a bottom dead center, which is operated by receiving an electric signal from a smoke detector or the like. A solenoid, which projects in accordance with the movement of the solenoid's plunger with spring force, pushes the brake lever to release the brake, a closing cam, and a disc that rotates in conjunction with the rotation of the shutter winding shaft,
A stop trigger lever that swings when a pin attached to the outer periphery of the disk swings, and a return lever that slides with spring force to retract the closing cam in conjunction with the swing of the stop trigger lever, and the disk. A control device for a shutter opening / closing device, which is attached to the outer peripheral part of the shutter and has a home position return lever for returning the stop trigger lever to the original position by the rotation accompanying the rise of the shutter. 2. The control device for a shutter opening / closing machine according to claim 1, wherein a lever for manually projecting the closing cam is attached to the plunger of the solenoid.