JP2003307084A - Opening and shutting drive of sheet shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a sheet shutter drive saving a space with a high efficiency and a low cost. <P>SOLUTION: As a drive of a pivot winding up the sheet shutter, a large number of small spur gears or worm wheels are arranged on a large-sized spur wheel or the circumference of a worm wheel to drive them with a large number of low cost small motors, and reduction of a driving cost, enhancement of mechanical reliability and promotion of space-saving efficiency can be realized. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a drive for opening and closing a seat shutter which is provided in a frozen warehouse, a clean room or the like to prevent outside air from entering when people or things come in and out, and requires the shutter to be opened and closed at a relatively high speed. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, in these opening and closing drive devices for sheet shutters, a single large reduction gear and a large motor have been used to drive the rotary shafts. Therefore, the reduction gear and the motor are used in a small amount, and it is difficult to reduce the cost particularly in a small-volume production, and the cost of the entire device is high. Further, since the drive unit itself becomes large, a space-saving and lightweight drive device has not been realized.

[0003]

SUMMARY OF THE INVENTION The present invention significantly reduces the cost of the motor and the speed reducer for driving the spindle to occupy a large part of the manufacturing cost in the sheet shutter device, and also reduces the cost of each motor and the speed reducer of the drive unit. The present invention provides a low-cost and highly-reliable sheet shutter drive device that improves durability, reliability, and safety by dispersing and reducing the shared spindle torque. In addition, the motor and the speed reducer, which have required a large space up to now, are greatly downsized to reduce the cost of the entire apparatus and improve its appearance and aesthetics.

[0004]

According to the present invention, a plurality of small spur gears or worm gears are arranged so as to mesh with each other on the circumference of a large spur gear or a worm wheel provided on a sheet winding shaft of a sheet shutter device body. However, by driving them with an inexpensive and highly reliable small DC motor, the torque burden per gear is reduced and distributed to ensure the prescribed torque and prescribed reliability, and the cost of parts and storage space are greatly reduced. To do.

The spur gear power transmission means and the worm power transmission means are used together as the main shaft rotation power, and the spur gear power transmission means with high mechanical efficiency is used as an ordinary power source, and the worm power is used when high torque is required at the time of starting or decelerating. By using the transmission means, a high speed and highly reliable sheet shutter winding mechanism is realized. In that case, in normal rotation, the main shaft rotation speed of the spur gear is made slightly higher than the main shaft rotation speed of the worm, and the load torque applied to the worm gear is reduced, so that smooth rotation power of the main shaft can be obtained.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment corresponding to claim 1 of the present invention will be described with reference to FIGS.

Both ends of the winding pipe 9 of the sheet shutter 1 are supported by bearings 8 provided on a support plate 7 and are rotatable, and a large spur gear 6 is attached to an end of the winding pipe 9. The sheet shutter 1 is wound around the outer circumference of the take-up pipe 9 by the rotation of the take-up pipe, and conversely, when the take-up is unwound, the sheet shutter 1 is opened and closed.

A plurality of small spur gears 5 are attached to the rotary shaft of a small motor 4, the small motors 4 are fixed to a support plate 7, and the small spur gears 5 are arranged so as to mesh with the circumference of the large spur gear 6. Has been done.

A large amount of power is generated by simultaneously rotating a plurality of small motors 4 in the same direction, and a large torque is transmitted to the winding pipe 9 via the small spur gears 5 and the large spur gears 6, and the sheet shutter 1 is wound up. The metal member 2 at the end of the pipe 9 is wound up by the pipe 9 and ascends along the guide 3.

An embodiment corresponding to claim 2 will be described with reference to FIG.

Large spur gears 6 are attached to two positions on both ends of the winding pipe 9, and a plurality of small motors 4 corresponding thereto are attached.
By arranging the small spur gear 5, a winding torque twice as high as usual is generated, and a wide and heavy sheet shutter can be opened and closed.

An embodiment corresponding to claim 3 will be described with reference to FIG.

A large-scale spur gear 6 is attached to the front side of the support plate 13 provided in the opening / closing drive of the seat shutter, and a worm wheel 10 is attached to the winding pipe 9 on the opposite side. The take-up pipe 9 passes through a bearing fixed to the support plate 13 and can rotate.

A plurality of small motors 4 are attached to the opposite side of the support plate 13, and a small spur gear 5 is arranged on the circumference of the rotary shaft at a position where the small spur gear 5 meshes with the large spur gear 6. Similarly, a worm wheel 10 fixed to the winding pipe 9 is provided on the opposite side of the support plate 13, and a plurality of worm gears 11 rotatable by a small motor 12 are provided on the circumference thereof. The worm gear 11 is supported by the bracket 20, and the bracket 2
0 is fixed to the back side of the support plate 13.

When the small motor 4 and the small motor 12 are driven at the same time, when a high torque is required to start to rotate, the worm system starts to rotate with a high deceleration rate, and at the time of steady rotation thereafter, a spur gear system with high mechanical efficiency is used. The winding pipe 9 rotates, and the sheet shutter is efficiently wound and opened / closed.

An embodiment corresponding to claim 4 will be described with reference to FIG.

When the rotation speed of the winding pipe 9 rises to a certain degree and becomes a steady rotation, the small worm gear driving motor 12 having a large reduction ratio has to rotate at a higher speed than the spur gear driving motor 4. The rotation torque sharply decreases. Therefore, the rotation speed of the take-up pipe 9 is made slightly higher than the rotation speed generated by the small motor 12 to reduce the rotation load of the worm side small motor 12 and smooth the rotation.

[0018]

EXAMPLE An example according to the present invention is shown in FIG. 1 (front view) and FIG. 2 (side view).

The sheet shutter 1 is a plate material having a certain degree of flexibility such as soft vinyl chloride material. A metal member 2 is added to one end of the sheet shutter 1 to increase rigidity, and the other end is attached to a winding pipe 9 to rotate the same. It is designed to be rolled up by.

Both ends of the sheet shutter 1 and the metal member 2
Fits in the groove of the guide 3 and slides only in the vertical direction.

Both ends of the take-up pipe 9 are fitted in bearings 8 attached to a support plate 7 which is an inner frame so that they can rotate freely. Winding pipe 9
A large spur gear 6 is attached to the end of the.

A plurality of small spur gears 5 are arranged on the circumference of the large spur gear 6 so as to mesh with the large spur gear 6.
The small spur gear 5 is attached to the rotary shaft of the small motor 4,
The small motor 4 is fixed to the support plate 7 with screws. The small motor 4 is, for example, a low-priced small DC motor with an encoder that is commercially available for general industry.

The small motor 4 is equipped with an encoder 14 that outputs a pulse according to the rotation, and the total number of rotations and the rotation speed of the small motor 4 are controlled by the pulse detected by the rotation.

When a driving current flows through all the small motors 4, the rotational force is transmitted from the motors to the small gear 5, the large spur gear 6, and the winding pipe 9, and the end portion of the sheet shutter 1 is wound up by the rotational power. The metal member 2, which is the other end of the sheet shutter 1, rises along the guide 3 and the shutter is opened. When the motor rotates in the reverse direction, the winding portion of the sheet shutter 1 is unwound, and the sheet shutter 1 itself and the metal portion 2 are self-weighted to lower and close the sheet shutter 1.

FIG. 3 shows another embodiment.

A support plate 13 is sandwiched between the ends of the winding pipe 9, a large spur gear 6 is mounted on the front side, and a worm wheel 10 is mounted on the rear side. A plurality of small spur gears 5 are provided on the circumference of the large spur gear 6 so as to mesh with each other. The small spur gear 5 is mounted on the rotary shaft of a small motor 12 mounted on the opposite side of the support plate 13.

The small motor 12 and the worm gear 11 are supported by the bracket 20, and the bracket 20 is fixed to the support plate 13 so that the thrust load applied to the worm gear 11 can be supported.

When the small motors 4 and 12 are driven at the same time to rotate the take-up pipe 9, the worm gear 10 having a high reduction ratio at the time of starting, which requires a torque in the initial stage of rotation,
The drive system 11 serves as the main driving force transmission means to rotate the winding pipe 9, and when it starts to rotate to some extent, the spur gears 5 and 6 having high mechanical transmission efficiency and excellent durability serve as the main power transmission means and the winding pipe 9 Each miniature motor is electronically controlled to rotate.

Since the effective winding radius of the winding pipe 9 increases in proportion to the winding amount of the sheet shutter 1,
In order to keep the opening / closing speed of the seat shutter constant, the motors 4 and 12 are electronically controlled to increase / decrease the rotation speed according to the total number of pulses output from each encoder.

When the small motors 4 and 12 are rotating in a steady state, the rotation speed of the small motor 12 of the worm transmission system having a large reduction ratio must be several times faster than that of the small motor 4, which is efficient. It goes out of the normal motor operating range, and as a result, the rotating torque decreases. Therefore, it is desirable that the small motor 12 rotates in a state where the load torque of the take-up pipe 9 is not applied in the steady rotation. In the normal winding state, the rotation speed of the winding pipe 9 by the small motor 4, the spur gears 5 and 6 is set to be slightly higher than the rotation speed by the worm, and the rotation of the spur gear catches up with the rotation of the worm side and the load is applied. When it becomes, it is detected by the pulse of the encoder 14 and the small motor 4
The electronic control of the motor is performed so that the rotation speed of is reduced once, and when the load is removed again, the original speed is restored.

When the sheet shutter is rolled up and its end approaches the upper end and deceleration starts, this time the small motor 4
The rotational speed of is changed to be slightly smaller than that on the worm side, and the drive of the spur gear drive is switched to the drive of the worm gear drive again.
The worm gear drive system has a high reduction ratio, enables highly accurate positioning near the end point, and since it is also an appropriate friction drive, it effectively operates as a brake system.

An embodiment will be described with reference to FIG.

When the open / close switch 18 is pressed, the sheet shutter 1 is wound up by the winding pipe 9 provided at the upper part and its drive system, and the end portion thereof rises along the rail of the guide 3.

The lower and upper ends of the operation of the sheet shutter 1 are electrically detected by, for example, limit switches 16 and 15, and thereafter the motor of the sheet shutter 1 is controlled so as to stop braking at a constant rotation amount.

When a person or an object passes through the shutter area, it is detected by the photoelectric switch 17 or the mat switch 19, and the shutter is automatically closed after a certain period of time. At that time, for example, a method of issuing a warning sound by voice to confirm safety is also effective.

[0036]

INDUSTRIAL APPLICABILITY According to the present invention, since the motor and the speed reducing mechanism are very compact and mass-produced products can be diverted, it is significantly larger than the conventional structure in which a large AC single phase or three phase motor and a large speed reducing mechanism are used independently. It is possible to reduce various component costs and assembly costs.

Since the occupied volume of the driving portion is greatly reduced and the entire system is lightweight and miniaturized, it can be transported to the site of a factory or the like.
Construction costs and installation time for installation are greatly reduced.

Since the load can be distributed to a plurality of drive systems in the worm transmission part where wear occurs, the reliability of the entire system is improved as compared with a large drive system that is driven independently, and the number of maintenance / part replacement man-hours is also greatly reduced. To be done. Especially in the worm drive, the shutter does not fall under its own weight even if the motor stops during a power failure, which makes the system safe.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment according to the present invention.

FIG. 2 is a right side sectional view of an embodiment according to the present invention.

FIG. 3 is a diagram of an embodiment according to the present invention.

FIG. 4 is a diagram of an embodiment according to the present invention.

[Explanation of symbols]

1, sheet shutter 2. Metal member 3, guide 4, 12, small motor 5, small spur gear 6. Large spur gear 7, 13, support plate 8, bearing 9. Winding pipe 10, warm foil 11, worm gear 14, encoder 15, 16 limit switch 17, photoelectric switch 18, open / close switch 19, mat switch 20, bracket

Claims (4)

[Claims] 1. A sheet shutter device for opening and closing a shutter by winding a sheet-shaped shutter material having appropriate flexibility around a predetermined rotating shaft, wherein a large spur gear is provided on the rotating shaft. An opening / closing drive device for a seat shutter, comprising a plurality of small spur gears meshing with the spur gear and a plurality of small motors driving the spur gear arranged on the circumference. 2. A large-sized spur gear is arranged at each of two ends of the rotary shaft, and a plurality of small spur gears corresponding to the large spur gear and small motors for driving the large spur gear are arranged to further increase the sheet winding torque of the rotary shaft. Claim 1 characterized in that it has increased.
An opening / closing drive device for the sheet shutter described. 3. A plurality of small spur gears, which are arranged so as to mesh with the large spur gear and a worm wheel, are mounted on the rotary shaft, and a plurality of small spur gears for driving them. 2. A motor is arranged, and a plurality of worm gears and small motors arranged so as to mesh with the circumference of the worm wheel are arranged, and the rotary shaft is driven by two kinds of drive systems. An opening / closing drive device for a sheet shutter according to claim 2. 4. When the seat shutter is in the steady winding state, the spindle rotation speed generated by the spur gear and the motor is set to be slightly higher than the spindle rotation speed generated by the worm gear and the motor, and the load torque of the rotation shaft is worm driven. 4. The opening / closing drive device for a sheet shutter according to claim 3, wherein the opening / closing drive device is adapted not to be applied to the system.