JP2002266572A - Motor-driven shutter drive unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor-driven shutter drive unit relieving load to a speed reducer by providing a spring coupler between a winding shaft and the speed reducer. SOLUTION: The drive unit is composed of an electric motor 8 being a power source, the speed reducer 10 for decelerating power from the electric motor 8, the winding shaft 7 for winding slats by receiving the power from the speed reducer 10, and a spring coupler 37 provided between the speed reducer 10 and the winding shaft 7, transmitting the power from the speed reducer 10 to the winding shaft 7 and preventing the transmission of the power from the winding shaft 7 to the speed reducer 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter driving device.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Sho 60-1381 discloses a prior art in which a spring coupler is used in a drive device for a winding shaft of an electric shutter to suppress the rotation of the winding shaft.
There is a screen winding device disclosed in Japanese Patent Publication No. 96-96.

In the above-mentioned screen winding device, a locking spring is arranged in a gap between a fixed tube integrated with a winding shaft and a carrier of a planetary gear in the middle of the speed reduction device to constitute a spring coupler. When the operation of the electric motor is stopped, the carriers of the planetary gears are automatically fixed to each other to prevent transmission of power from the winding shaft of the screen to the reduction gear.

[0004]

When a spring coupler is arranged between a fixed tube integrated with a winding shaft and a carrier of a planetary gear in the middle of the reduction gear, the load of the screen is fixed while the winding shaft of the screen is fixed. Etc. are always applied to the planetary gears. Further, when the material to be wound is heavier than the screen, such as a shutter slat, creep caused by the rotation torque caused by the load being constantly applied to the planetary gears may cause the resin-made planetary gears to creep. There is. The present invention solves the above problems.

[0005]

Means for Solving the Problems A first technical means taken to solve the above-mentioned technical problem is as described in claim 1, "an electric motor which is a power source, and A reduction gear for reducing the power, a winding shaft for winding the slats by receiving the power from the reduction gear, and a winding shaft disposed between the reduction gear and the winding shaft; And a spring coupler for transmitting power to the winding shaft and preventing transmission of power from the winding shaft to the speed reduction device. "

In the above configuration, the power from the electric motor is transmitted to the winding shaft, but the power from the winding shaft is not transmitted to the reduction gear by the spring coupler. For this reason, it is possible to prevent creep destruction of the speed reducer caused by the load being continuously applied to the speed reducer.

A second technical means taken to solve the above-mentioned technical problem is that, as set forth in claim 2, "a winding spring device is provided, and the winding spring is engaged with the winding shaft. A characteristic electric shutter driving device. "

In the above configuration, in the configuration in which the winding spring is provided to engage with the winding shaft, a balance shutter can be formed by balancing the load of the slat and the urging force of the winding spring, and the spring coupler is disengaged. This allows the slats to be released quickly in an emergency.

Further, in a shutter or the like in which a lighting part for ventilation and lighting is provided on the slat, when the slat lands on the ground, the balance between the slat of the balance shutter and the urging force of the winding spring is lost. At this time, the urging force of the hoisting spring is absorbed by the frictional force of the spring coupler, so that the hoisting of the slats can be stopped, and a load can be prevented from being applied to the speed reducer.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an electric shutter driving device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall view of an electric shutter according to the present invention. The electric shutter includes a slat 1, a guide rail 2, an opening 3, and a driving device 4 that moves up and down the slat 1. The shutter driving device 4 is disposed above the slat 1, and the slat 1 moves up and down along the guide rail 2 to open and close the opening 3 of the building.

FIG. 2 is a longitudinal sectional view of the shutter driving section 4 of FIG. The brackets 5 and 6 are fixed to the periphery of the opening of the building, and the electric motor 8 is fixed to the building via the bracket 5. The bracket 6 fixes the shaft member 30 to the building.

The shaft member 30 is arranged coaxially with the output shaft of the electric motor 8, and the cylindrical winding shaft 7 for winding the slat 1 of FIG. 1 is a central shaft of the shaft member 30 and the electric motor 8. The shaft member 30 and the electric motor 8 are rotatably supported while the shaft member 30 and the electric motor 8 are housed about the rotation center.

The electric motor 8 is connected to an output unit 20 via a speed reducer 10. The first fixed tube 24 is a second fixed tube 29
And is rotationally fixed to the electric motor 8 via the.

A spring torque transmitting portion 32 is rotatably supported at an end of the shaft member 30 on the opposite side of the bracket 6, and one end of the spring torque transmitting portion 32 is provided on the outer peripheral surface of the shaft member 30.
The spring force is urged by a winding spring 31 having the other end fixed to the spring.

When the electric shutter driving device is operated, the electric motor 8 outputs a rotational torque, and the output of the electric motor 8 is transmitted to the output section 20 by the rotational torque decelerated (boosted) by the speed reducer 10. . The output unit 20 includes the winding shaft 7
To rotate the winding shaft 7.

The spring torque transmitting portion 32 is rotatably engaged with the winding shaft 7 and applies torque to the winding shaft 7 in the slat winding direction. Sometimes the slat 1 can be quickly opened.

FIG. 3 is a longitudinal sectional view of the periphery of the take-up shaft 7, the electric motor 8, the reduction gear 10, the output section 20, the first fixed pipe 24 and the second fixed pipe 29 according to a specific example of the present invention. The reduction gear transmission 10 of this specific example boosts the rotation torque of the electric motor 8 and transmits the torque to the output unit 20. Reduction gear 10
It is composed of planetary gears (sun gears, planetary gears, and internal gears) including three-stage resin gears.

In the first stage, the sun gear is the electric motor 8
Receiving the rotational torque from the output shaft 9, the planetary gears 11 (three planetary gears 11 including two not shown in FIG. 3) supported by the carrier 12 Rotate. The planetary gear 11
The gear is also in mesh with the inner peripheral surface of the internal gear 16, and the rotation is regulated by the internal gear 16. Therefore, the carrier 12 is rotated in the same rotational direction as the rotational torque output from the output shaft 9, and 9 to output a reduced (increased) rotational torque.

In the second stage, the sun gear is the carrier 12. The planetary gear 1 supported by the carrier 14 receives the rotation torque output from the carrier 12.
3 (three planetary gears 13 including two not shown in FIG. 3) rotate. The planetary gear 13 is also in mesh with the inner peripheral surface of the internal gear 16,
Since the rotation is regulated by the internal gear 16, the carrier 14 outputs a rotation torque in the same rotation direction as the rotation torque output by the carrier 12 and reduced (boosted) by the carrier 12.

In the third stage, the sun gear is the carrier 14, and receives a rotation torque output from the carrier 14, and is planetary gear 15 (shown in FIG. 3) fixed to the case portion of the electric motor 8 so as to be able to rotate. Not 2
, Three planetary gears 15) rotate. Since the position of the planetary gear 15 itself is fixed,
The third stage is in the same state that the carrier is fixed, and the planetary gears 15 rotate the internal gear 16 in the rotation direction opposite to the rotation torque output by the carrier 14,
Further, the rotation torque output from the carrier 14 is reduced (boosted).

The structure of the spring coupler 37 according to the present invention will be described with reference to FIGS.

The internal gear 16 has an engaging portion 17 as shown in FIGS.

The output section 20 shown in FIG. 3 is an annular member having a sectional shape shown in FIG. 4, and is meshed with the winding shaft 7 so as to be integrally rotatable. The output section 20 has an engaging section 21 as shown in FIGS. The first fixed tube 24 in FIG. 3 is an annular member having a sectional shape shown in FIG. 5 and has an engaging portion 25 as shown in FIGS. I have.

The coil spring 26 shown in FIG. 3 has engaging projections 27, 2 projecting radially inward at both ends of the spring.
8 is fitted into the inner peripheral surface of the first fixed pipe 24,
It is located between the inner peripheral surface of the fixed tube 24 and the outer peripheral surface of the engaging portion 17 of the internal gear.

The second fixed tube 29 in FIG. 3 is an annular member having a sectional shape shown in FIG. 7, and is engaged with the first fixed tube 24 as shown in FIGS.

As shown in FIGS. 3 and 7, a second fixed pipe 29 is rotatably fixed to a motor case housing the electric motor 8 by an engagement pin 33. Since the motor case is fixed to the bracket 5, the first fixed pipe 24
Is fixedly rotated.

As shown in FIG. 3, a coil spring 26 is fitted on the inner peripheral surface of the first fixed tube 24, and the engaging projection 17 of the internal gear 16 and the engaging portion 21 of the output unit 20 are inserted therein. .

FIG. 5 shows the arrangement of the engaging projections 27 and 28 of the first fixed tube 24 and the coil spring 26, the engaging portion 17 of the internal gear, and the output portion 21 in the sectional direction.
As shown in FIG. 5, the engagement portion 17 of the internal gear
The engaging portion 21 enters between the end portions 18 and 19, the engaging protrusion 27 of the coil spring 26 between the end portion 18 and the engaging portion 21, and the coil between the end portion 19 and the engaging portion 21. The engaging projection 28 of the spring 26 is located.

When the internal gear 16 rotates, the ends 18, 19 of the engaging portion 17 of the internal gear push the engaging projections 27, 28 of the coil spring 26, and the diameter of the coil spring 26 is reduced. 1
The frictional force between the inner ring 2 and the inner peripheral surface of the first fixed tube 24 is reduced, and the ends 18 and 19 of the engagement portion 17 of the internal gear 16 are engaged with the engagement projections 27 and 28 of the engagement portion 21 of the output portion 20. It rotates while pushing the end 22 or 23.

When the output section 20 attempts to rotate by receiving an external force, the ends 22, 23 of the engagement section 21 of the output section 20 push the engagement projections 27, 28 of the coil spring 26, and the diameter of the coil spring 26 becomes Spread the coil spring and the first
The frictional force between the inner peripheral surfaces of the fixed tube 24 increases, and the output portion 20
Does not rotate.

The spring coupler 37 of the present invention functions to transmit the rotational torque of the internal gear 16 to the output unit 10 but to prevent transmission of the rotational torque of the output unit 20 to the internal gear 16.

Since the coil spring and the inner peripheral surface of the first fixed tube 24 are fixed by the frictional force of the spring coupler 37, the rotational torque of the output section 20 is made of three-stage resin in the reduction gear 10 after the internal gear 16. Of the planetary gears (sun gear, planetary gear, internal gear).

Therefore, when the slat 1 is stopped, the resin planetary gear can be prevented from being damaged by creep caused by the continuous load applied to the resin planetary gear. Further, since there is no need to consider deformation due to creep, the type of resin for the planetary gear is relatively freely selected.

The electric shutter according to this embodiment is provided with a lighting part 36 for ventilation and lighting. When the slat 1 lands on the ground and the daylighting unit 36 is in the open state, it is difficult to maintain the balance between the load on the slat 1 and the hoist spring 31, and the load on the slat 1 and the When the balance is lost, an urging force acts on the winding shaft 7 in a direction to wind up the slat 1.

In this state, the urging force of the ratchet 1 in the direction of winding up the rat 1 is absorbed by the frictional force of the spring coupler 37, so that the winding up of the slat 1 can be stopped, and the speed reduction device 10 Can be eliminated.

The brake mechanism of this embodiment is the spring coupler 37. The spring coupler 37 is used when the electric motor 8 is not driving the winding shaft 7.
Fix so that it does not rotate.

As another brake mechanism, there is an electromagnetic brake. However, if an electromagnetic brake is arranged between the speed reducer and the take-up shaft, a large braking force is required. A problem arises in that the size of the solenoid against the pressing force of the brake increases.

When the power supply to the electric motor 8 is stopped in an emergency, it is necessary to release the brake that stops the rotation of the winding shaft 7 and release the slat 1. If the brake is released from the shutter in this specific example, the slat 1 can be lifted and released with a small operation force without the assistance of the electric motor 8.

However, the brake mechanism using the spring coupler 37 requires a clutch mechanism for releasing the hindrance of the rotation of the spring coupler 37 in order to instantaneously release the brake in an emergency.

In this specific example, since the spring coupler 37 is provided inside the take-up shaft 7, it is necessary to arrange the spring coupler 37 between the take-up shaft 7 and the speed reducer 10, and as shown in FIG. The clutch mechanism is constituted by the engagement of the first fixed pipe 24 and the second fixed pipe 29 provided between the take-up shaft 7 and the speed reducer 10.

The first fixed tube 24 and the second fixed tube 29 are engaged with the right and left engaging portions of FIG. 3 along the peripheral surface as shown in FIG.

As shown in FIG. 7, a fixing pin 33 penetrates the second fixing tube 29 and an elongated hole 35 (FIG. 3) provided on the peripheral surface of the motor case, and the second fixing tube 29 is connected to the motor case and the motor case. It is rotationally fixed via a bracket 5.

The wire 34 has one end hanging outside the electric shutter driving device 4 as shown in FIG. 1, and the fixing pin 33 is drawn inside the elongated hole 35 by the user pulling the wire 34 down in an emergency. 3, the second fixed tube 29 moves to the left in FIG. As a result, the engagement between the first fixed tube 24 and the second fixed tube 29 is released, the rotation of the first fixed tube 24 is released, and the first fixed tube 24 rotates together with the spring coupler 37.

[0045]

The spring coupler 37 of the present invention transmits the rotational torque of the reduction gear to the take-up shaft, but functions to prevent transmission of the rotational torque of the take-up shaft to the reduction gear.

Therefore, it is possible to prevent creep destruction or deformation caused by the load of the slat or the urging force of the winding spring being continuously applied to the reduction gear. In addition, since the choice of materials for the gears of the reduction gear is expanded, it is possible to use inexpensive materials and reduce the cost of the reduction gear.

Further, when the user releases the rotation fixing of the first fixed tube by pulling the wire hanging from the driving device in an emergency, the first fixed tube rotates together with the winding shaft, and the user is instructed. It is possible to lift and open the slat 1 with a small operation force.

[Brief description of the drawings]

FIG. 1 is an overall view of an electric shutter according to the present invention.

FIG. 2 is a longitudinal sectional view of the shutter driving device shown in FIG.

FIG. 3 is a longitudinal sectional view showing the periphery of a spring coupler and a fixed tube according to the present invention.

FIG. 4 is a sectional view taken along the line AA in FIG.

5 is a sectional view taken along line BB in FIG.

FIG. 6 is a sectional view taken along the line CC in FIG. 3;

FIG. 7 is a sectional view taken along the line DD in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slat 2 Guide rail 3 Opening 4 Drive device 5 Bracket 6 Bracket 7 Winding shaft 8 Electric motor 9 Motor output shaft 10 Reduction gear 11 Planetary gear 12 Carrier 13 Planetary gear 14 Carrier 15 Planetary gear 16 Internal gear 17 Internal gear engagement Part 18 End of internal gear engaging part 19 End of internal gear engaging part 20 Output part 21 Output part engaging part 22 End of output part engaging part 23 End of output part engaging part 24 First fixing Tube 25 First fixed tube engaging portion 26 Coil spring 27 Coil spring engaging protrusion 28 Coil spring engaging protrusion 29 Second fixed tube 30 Shaft member 31 Winding spring 32 Spring torque transmitting member 33 Fixing pin 34 Wire 35 Slot 36 Lighting part 37 Spring Coupler

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takeharu Honda 2-3-3 Showa-cho, Kariya-shi, Aichi F-term in Ishin Engineering Co., Ltd. (Reference) 2E042 AA01 CA01 CA07 CA11 CB01 CB02 CB08 DA01

Claims (2)

[Claims] An electric motor serving as a power source; a speed reducer for reducing the power from the electric motor; a winding shaft for receiving the power from the speed reducer to wind up the slat; Disposed between the device and the winding shaft,
An electric shutter driving device, comprising: a spring coupler that transmits power from the reduction gear to the winding shaft and prevents transmission of power from the winding shaft to the reduction gear. 2. The electric shutter driving device according to claim 1, further comprising a winding spring, wherein the winding spring is engaged with the winding shaft.