JPS5846998B2 - Shutter winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for winding up a shutter at high speed.

Conventional shutters generally roll up at a low speed, but the shutters at the entrances and exits of bank cash transport vehicles and fire engines
It is required to wind up or unwind at high speed.

For this reason, attempts have been made to increase the rotation speed of the shutter winding motor by one step so that the shutter winds up at a high speed from beginning to end. This may cause damage to the motor, or it may cause a sudden shock to the transmission mechanism of the chain, sprocket, etc., causing the chain to break or sprocket teeth to be cut off. Because of the inertia of the motor's rotation, the shutter was often damaged.

For this reason, the shutter winding speed was restricted, which was inconvenient.

In order to eliminate the above-mentioned defects, a shutter opening/closing device using a pole number conversion motor was used to wind the shutter at a low speed at the start of winding, at a high speed in the middle, and then at a low speed again at the end of winding. 49228) was proposed.

However, for the same output, this device requires the use of a pole-changing motor that is much larger and more expensive than a general-purpose motor, and is also attached to the side of the same-pole converting motor to stop the shutter. The brake system for the shutter and the regulating mechanism for controlling the descending speed when the shutter's own weight is lowered must be large and have a large capacity to match the maximum rotational torque of the motor when rotating at high speed. Therefore, there was a drawback that the entire device became large and expensive.

The purpose of the present invention is to eliminate the above-mentioned defects, and to prevent damage to the shutter opening/closing device by winding the shutter at a low speed for a certain period of time between the beginning and the end of winding, and at a high speed during the middle period, and to improve safety. Another object of the present invention is to provide a shutter winding device in which a motor, a brake device, and a speed regulating mechanism are downsized, and the entire device can be made more compact and cost-reduced.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the drawing, 1 is a shutter, 2 is a winding shaft of the shutter, and 3 is a sprocket, which is fixed to the winding shaft 2.

4 is a first motor, 5 is a second motor, and 6 is a first speed reducer, which is directly connected to the rotating shaft of the first motor 4, and has a speed reduction ratio of 1/R1.

However, R1 is more dog than 1. 7 is a second speed reducer, which is directly connected to the rotating shaft of the second motor 5, and whose speed reduction ratio is 1/1.
Let it be R2.

However, R2 is more dog than 1.

8 is a brake attached to the first motor 4, and 9 is a one-way clutch, which is located between the rotating shaft of the first reduction gear 6 and the rotating shaft of the second motor 5, and connects both shafts.

10 is a sprocket attached to the rotating shaft of the second reduction gear 7, and 11 is an endless chino, which extends between the sprocket 3 and the sprocket 10.

12 is a power switch, and when the wind-up button is pressed, current flows first to the first motor 4, then to the second motor 5, and finally to the first motor 4, stopping the motor 4. At the same time, the brake 8 is activated.

Furthermore, when the rewind button of the power switch 12 is pressed, the brake 8 is released, and then the first motor 4 rotates in the opposite direction, and this rotation is caused by the first reduction gear 6 and the one-way clutch 9.
, the shaft of the second motor 5, and the second speed reducer 7 to rewind the shutter 1.

Next, the operation of the shutter opening/closing device constructed as described above will be explained.

When winding up the closed shutter 1, press the winding button on the power switch 12. First, current flows to the first motor 4, causing it to rotate, and the first speed reducer 6 reduces the rotation speed to 1/R1. This rotation is further reduced to 1/R2 by the second reducer 7 via the one-way clutch 9 and the shaft of the second motor 5, and the rotation speed of the first motor 4 becomes a low speed of 1/R1R2.

This rotation is transmitted to sprocket 10, chino 11, and sprocket 3, and winds up shutter 1 at a low speed.

Next, when the shutter 1 is rolled up to a certain height, a control device (not shown) is activated, and current is also supplied to the second motor 5 to start rotating.

In this case, the first motor 4 is also rotating, but due to the action of the one-way clutch 9, the rotation of the first motor 4 is not transmitted, and only the rotation of the second motor 5 is transmitted to 1/2 by the second reduction gear 7.
Since the speed is decelerated to R2, the shutter 1 is wound up at a high speed.

Then, just before the shutter 1 finishes winding, a control device (not shown) is activated to cut off the current to the second motor 5, causing the first motor 4, which was rotating under no load, to start the shutter. As in the case, it is wound up at a low speed of 1/RIR2.

At the same time as the current to the first motor 4 is cut off, the brake 8 is activated and the rotation of the first motor 4 is stopped, and the shutter 1
winding ends gently.

Next, when rewinding the shutter 1 to close the entrance, when the rewind button of the power switch 12 is pressed, the brake 8 is first released, and then the first motor 4 is reversely rotated. Since the shutter 1 is decelerated to 1/RIR2 via the first speed reducer 6, the shaft of the second motor 5, and the second speed reducer 7, the shutter 1 is rewound and lowered at a low speed.

As described above, in the embodiment of the present invention, the first motor 4 and the second motor 5 are connected by the first reducer 6 and the one-way clutch 9, the second motor 5 is connected to the second reducer 7, and the second motor 5 is connected to the second reducer 7, Since the shutter is wound by the second reducer 7, the shutter is first wound at a low speed by the first motor 4, then wound at a high speed by the second motor 5 in the middle, and then wound again at a low speed by the first motor 4 when winding is completed. Therefore, it is possible to shorten the shutter winding time, allowing cash transport vehicles and fire engines to enter and exit quickly, and to reduce the shock when starting and stopping winding, thereby preventing damage to the shutter and power transmission mechanism. The shutter can be rolled up safely.

In particular, in the embodiment of the present invention, the second reducer 7, which is necessary for decelerating the second motor 5 during high-speed operation, is used in combination with the first reducer 6 during low-speed operation. Even if a gear with a small reduction ratio is used as 6.1, a large reduction ratio can be obtained during low speed operation.

Therefore, when it is desired to obtain the same reduction ratio, the reduction ratios of both reduction gears 6 and 7 can be made smaller.

Furthermore, since the rotating shaft of the first motor 4 to which the brake 8 is connected always rotates at a higher speed than the output shaft of the first reducer 6, the rotational torque of the rotating shaft of the first motor 4 is equal to the output of the first reducer 6. It is always smaller than the rotational torque of the shaft, and the capacity and size are sufficient to brake the rotational shaft of the first motor 4, making it possible to reduce the capacity and size, and reduce costs.

Furthermore, for the same reason, the size and capacity of a speed regulating mechanism (not shown) attached to the side of the brake 8 to control the speed when the shutter's own weight falls can be reduced.

In addition, when using a pole-change motor as in the past, the size and capacity of the brake required to brake the motor's two rotational shafts during high-speed hoisting is increased, which increases the size and overall cost of the device. In the present invention, this defect can be solved.

Furthermore, in the present invention, since it is sufficient to use two ordinary motors, the device can be made more compact and inexpensive compared to the conventional device that uses an expensive and large pole number changing motor.

In the embodiment described above, the rotation of the second motor 5 is transmitted to the winding shaft 2 via the sprocket 3, the chino 11, and the sprocket 10, but this power transmission mechanism may be a gear mechanism.

Further, the drive shaft of the motor, that is, the output shaft of the second reduction gear 7 may be directly connected to the hoisting shaft 2.

Furthermore, the one-way clutch 9 may be replaced with an electromagnetic clutch.

In this case, the winding operation of the shutter 1 is the same as in the previous embodiment, but in order to stop the shutter during winding at high speed, when the power switch 12 is turned off, the electromagnetic clutch is activated and the second motor 5 is turned off. The brake 8 is applied to gently stop the shutter 1 and the winding device without damaging them.

Furthermore, when rewinding the shutter, the electromagnetic clutch is released to disconnect the first and second motors 4 and 5 and turn off the power to both motors 4 and 5, thereby reducing the rotational resistance caused by the external force of the second motor 5. The shutter can be lowered under its own weight at high speed.

As described in detail above, in the present invention, the first reduction gear 6 is connected to the rotating shaft of the first motor 4 for raising the shutter 1 at low speed, and the first reduction gear 6 is connected to the rotating shaft of the first motor 4 for raising the shutter 1 at a low speed. A brake 8 is connected to the rotating shaft of the first motor 4 so as to be located on the side of the first motor 4, and a second brake 8 is connected to the output shaft of the first reducer 6 to wind up the shutter 1 at high speed via a clutch 9. The second reducer 7 is connected to the output shaft of the second motor 5, and the winding shaft 2 of the shutter 1 is linked to the second reducer 7. It is possible to wind at a low speed for a certain period of time at the beginning and end of winding, and at a high speed in the middle to prevent damage to the shutter opening/closing device and increase safety.
The motor 4, 5° brake 8 and speed regulating mechanism have been downsized,
This has the effect of making the entire device more compact and reducing costs.

[Brief explanation of the drawing]

The figure is a front view showing an embodiment of a shutter winding device embodying the present invention.

Claims (1)

[Claims] 1. A first reduction gear 6 is connected to the rotating shaft of the first motor 4 for raising the shutter 1 at low speed, and
A brake 8 is connected to the rotating shaft of the first motor 4 so as to be located on the first motor 4 side with this first reduction gear 6 as a boundary, and a brake 8 is connected to the output shaft of the first reduction gear 6 via a clutch 9. A second motor 5 for winding up the shutter 1 at high speed is connected to the output shaft of the second motor 5, and a second reduction gear 7 is connected to the output shaft of the second motor 5.
A shutter winding device characterized in that a winding shaft 2 of a shutter 1 is linked to the second speed reducer 7. 2. The shutter winding device according to claim 1, wherein the clutch 9 is a one-way clutch or an electromagnetic clutch.