JP2000065231A - Actuator for damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To close a valve with restoring force of a flat spiral spring in an emergency by arranging the flat spiral spring wound through a gear by rotation of the gear, and arranging a solenoid brake for controlling rotation of a rotary shaft for winding the flat spiral spring. SOLUTION: In an opening condition of a damper, when an accident such as power failure in which current-carrying to a motor 3 is not controlled is generated current-carrying to an electromagnet of a solenoid brake 9 is interrupted an attraction plate 93 is separated in a free condition. As a result, a rotary shaft 81 of a flat spiral spring 8 also becomes a free condition the rotary shaft 81 is rotated in a direction reverse to a direction wound the flat spiral spring 8 by restoring force. A plate 7 is pushed by a shaft 61 of a gear 6, and is rotated by rotation of the gear 6, an output shaft 2 formed 4. integratedly with the plate 7 is rotated in a closing direction of a damper, and a vane of the damper is automatically closed. It is thus possible to use a small and low cost motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper actuator in which a rotating shaft for controlling the opening and closing of a vane of a damper is rotated forward and backward by driving a reversible motor to open and close a blade of the damper. The present invention relates to a damper actuator incorporating a mechanism for automatically opening or closing a vane of a damper in an emergency.

[0002]

2. Description of the Related Art Conventionally, an output shaft connected to a rotating shaft for controlling the opening and closing of a vane of a damper provided at a ventilation port or the like is rotated forward and backward by driving a reversible motor to open and close the damper. Such a damper actuator is known.

[0003]

In a conventional actuator for a damper, the driving force of a motor is used not only when the damper is opened but also when the damper is closed. Or, in the event that a situation arises that must be closed, this operation must be performed manually, for example, quickly opening or closing the dampers of several ventilation openings, such as ventilation openings in subway stations. It was impossible.

Therefore, a spring is provided on an output shaft that rotates when the damper is opened or closed, and the spring is wound by the driving force of the motor when the damper is opened or closed. An actuator was designed to be closed or opened, but in this actuator, if the spring was wound around when the damper was opened, the restoring force of the spring was used to close the damper. If the spring was to be wound at times, the restoring force of the spring was used when the damper was opened. Not only shorter, but also Although a rotary motor is not required, the load for opening or closing the damper and the load for winding the mainspring are simultaneously applied to the motor, so that a large motor having a large torque is required and the motor becomes expensive. there were.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art by using a single motor in a damper actuator, the operation of rotating a rotary shaft for controlling the opening and closing of the vane of the damper and the operation of winding a mainspring spring. It is an object of the present invention to provide a damper actuator in which a mechanism that can be operated independently is built in, a spring is wound, and a valve is closed by a restoring force of the spring in an emergency.

[0006]

According to the present invention, there is provided a damper actuator which rotates an output shaft connected to a rotating shaft for controlling opening and closing of a vane of a damper forward and backward by driving a reversible rotating motor to rotate a blade of the damper. An actuator for a damper that opens and closes, wherein the output shaft pivotally supports an internal gear that rotates independently of the output shaft by rotation of a motor, and inner peripheral teeth of the internal gear; A plate that supports a gear meshing with the outer peripheral teeth of a gear pivotally supported on the output shaft so as to rotate independently of the output shaft is fixed to the output shaft, and the gear is rotated by rotation of the gear. A mainspring wound around the mainspring is provided, and an electromagnetic brake for controlling rotation of a rotating shaft for winding the mainspring is provided.

[0007]

The opening and closing of the damper is performed by driving a reversible rotary motor. The spring is wound after the opening or closing operation of the damper is completed, and the spring is unwound only when a power failure occurs.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described specifically with reference to the drawings. FIG. 1 is a front view of a damper to which the actuator of the present invention is attached, FIG. 2 is a longitudinal side view of the actuator, FIG. 3 is a perspective view showing an internal structure of the actuator, and FIG. FIG.

1 is an actuator of the present invention,
An output shaft 2 connected to a rotary shaft A2 for controlling the opening and closing of vanes A1 to A1 of a damper A is provided in a casing 11 of the actuator.

The vanes A1... A1 of the damper A are configured to be simultaneously opened or closed via a connecting plate when the rotation shaft A2 rotates. Since the damper A itself is a known technique, a detailed description thereof will be omitted.

Reference numeral 3 denotes a reversible rotating motor fixed to the rotor when no power is supplied, and the rotating force of the rotor is reduced by a gear 31 integrated with the rotor.
And a reduction gear 32 for transmission to an internal gear described later.

Reference numeral 4 denotes outer peripheral teeth 42.
Reference numeral 2 denotes an internal gear having inner peripheral teeth 41 rotating in mesh with each other, and is rotatably supported by the output shaft 2 so as to rotate independently of the output shaft.

Reference numeral 5 denotes a gear that is pivotally supported on the output shaft 2 so as to rotate independently of the output shaft and the internal gear 4. A hole at the center of the internal gear 4 is freely inserted into the outer circumference of the cylindrical portion 51 so as to freely rotate.

Reference numerals 6 ... 6 denote gears meshing with the inner peripheral teeth 41 ... 41 of the internal gear 4 and the outer peripheral teeth 52 ... 52 of the gear 5, and a shaft 61 for pivotally supporting the gears 6 ... 6 freely. … 6
1 is fixed to a disk-shaped plate 7 fixed to the output shaft 2.

Reference numeral 8 denotes a mainspring. The inner end of the mainspring is a rotating shaft 8 having both ends supported by bearings.
1, the outer ends are fixed to the casing 11, respectively.

Reference numeral 82 denotes a gear 5 fixed to the rotating shaft 81 and protruding from the internal gear 4 integrally with the gear 5.
This is a gear that meshes with and rotates.

Reference numeral 9 denotes a rotating shaft 8 of the mainspring 8 when energized.
1 is an electromagnetic brake that prevents the rotation of the main shaft 1 and allows the rotation of the rotary shaft 81 when the power is cut off.
Is to be rewound.

Reference numeral 10 denotes a stopper which faces inward from the outside of the lower end of the casing 11, and a cam 101 fixed in the vicinity of the lower end of the output shaft 2 comes into contact with the output shaft 2 so that the output shaft 2 moves forward and backward within a range of 90 °. It is rotatable so that no further rotational force is applied to the damper A when the damper A is opened or closed.

In the figure, reference numerals 20 and 30 denote microswitches for detecting the rotation of the output shaft 2 and transmitting as an electric signal whether the damper A is open or closed, and are integrally fixed to the extension shaft of the output shaft 2. The contacts of the microswitches 20 and 30 are kicked by the cams 201 and 301 to be turned on and off.

Reference numeral 40 denotes a micro switch having a make contact and a break contact for detecting that the mainspring spring 8 is sufficiently wound and for controlling the energization of the motor 3 at the same time.
The contact is kicked by a cam 401 fixed to the rotating shaft 81 of the mainspring 8 and turned on and off. When the make contact of the micro switch 40 is on, the electromagnet 91 of the electromagnetic brake 9 is energized and the micro switch 40 is turned on. When the break contact is OFF, it acts to cut off the power supply to the motor 3.

Next, the operation of the actuator of the present invention will be described with reference to the illustrated embodiment in accordance with the above-described structure of the present invention.

When the power is first turned on to the motor 3 and the make contact of the micro switch 40 is OFF (break contact ON), it means that the mainspring 8 is not wound. Is set in advance so that the motor 3 is energized so that the motor rotates in the closing direction of the damper A.

When the damper A is closed, the motor 3
When the power is turned on for the first time, if the make contact of the micro switch 40 is OFF (break contact ON), the rotor of the motor 3 rotates in the closing direction of the damper A as described above, and the rotation of the rotor Although the force is transmitted to the internal gear 4 via the gear 31 and the reduction gear 32 integral with the rotor, the output shaft 2 is fixed by the stopper 10 so as not to rotate further in the closing direction. Only the internal gear 4 irrelevant to the rotation starts to rotate freely.

The rotation of the internal gear 4 causes the gears 6 meshing with the inner peripheral teeth 41 of the internal gear 4.
6 also rotates, but since the plate 7 on which the gears 6... 6 are pivotally supported is integral with the output shaft 2, the gears 6.

The rotation of the gears 6 rotates the central gear 5 meshing with the gears, and the gear 52 integral with the gears 5 rotates.

The rotation of the gear 52 causes the gear 82 fixed to the rotating shaft 81 of the spring 8 meshing with the gear 52 to rotate, and the spring 8 starts to be wound.

When the mainspring 8 is sufficiently wound, a cam 401 rotating via a gear fixed to the rotating shaft 81 of the mainspring 8 kicks the contact of the microswitch 40,
The break contact is turned off, the power to the motor 3 is cut off by the OFF signal, and the rotation of the motor 3 is stopped.
Is energized to suck the suction plate 93 integrated with the rotating shaft 91 to prevent the rotation of the rotating shaft 91, that is, the rotating shaft 81 of the mainspring 8 directly connected thereto. As a result, the mainspring 8 is fixed in a wound state, that is, a pressure accumulation state.

In this state, when the motor 3 is energized in the direction in which the damper A is opened, the internal gear 4 rotates in the opposite direction to the above, and the gears 6 meshing with the inner peripheral teeth 41 41
Also rotates, but since the gear 5 meshing with the gears 6... 6 is in a fixed state as described above, the gears 6.
And the plate 7 pivotally supporting the gears 6... 6 around the shafts 61... Rotates in the same direction as the internal gear 4. The output shaft 2 rotates, and the rotation shaft A of the damper A
2 rotates to open the vanes A1... A1 of the damper A.

The rotation of the output shaft 2 by 90 ° causes the damper A to rotate.
Is opened, further rotation is prevented by the action of the stopper 10, and at the same time, the contact point of the micro switch 20 is kicked and turned on, notifying the open state of the damper A, and turning off the power supply to the motor 3 at the same time. The rotation of the motor 3 stops.

When it is desired to close the damper A, when the motor 3 is rotated in the direction in which the damper A closes, the internal gear 4 and the gears 6... 6 rotate in the reverse direction, and the gears 6. The output shaft 2 rotates 90 ° in the reverse direction to close the vanes A1... A1 of the damper A, and at the same time the contacts of the microswitch 30 are kicked. Is turned on,
At the same time as notifying the closed state of the damper A, the power supply to the motor 3 is stopped and the rotation of the motor 3 is stopped.

Thereafter, irrespective of the pressure accumulation state of the mainspring 8, the above-described operation is repeated each time the motor 3 is energized to control the opening and closing of the damper A.

When the damper A is open, the motor 3
If an accident such as a power outage where power supply to the electromagnet cannot be controlled occurs, the power supply to the electromagnet 92 of the electromagnetic brake 9 is naturally cut off, so that the attraction plate 93 adsorbed by the electromagnet separates and becomes free. Therefore, the rotating shaft 81 of the mainspring 8 also becomes free, and the rotating shaft 81 rotates in the direction opposite to the direction in which the mainspring 8 is wound by the restoring force, ie, the unwinding force, of the mainspring 8 wound by the above-described operation.

Since the gear 5 is also rotated by the rotation of the rotating shaft 81, the gears 6 ... 6 meshing with the outer peripheral teeth 51 ... 51 are rotated. However, the motor 3 is fixed when no power is supplied, and the internal gear 4 is fixed. Is in a fixed state, so the gear 6 ...
6 rotates while meshing with the inner peripheral teeth 41... 41 of the internal gear 4.

The rolling of the gears 6 causes the plate 7 to be pushed by the shafts 61 of the gears 6 and 6 to rotate, and the output shaft 2 integral with the plate 7 to rotate in the closing direction of the damper A, thereby causing the damper A to rotate. A1 are automatically closed.

When the mainspring 8 is rewound, the make contact of the microswitch 40 is turned off and the break contact of the microswitch 40 is turned on by the rotation of the rotary shaft 81. It rotates in the closing direction and winds the mainspring 8 to prepare for the next accident such as a power failure.

In this embodiment, the case where the damper is closed in an emergency such as a power outage has been described. However, in the case of a ventilation hole in an underground shopping mall, if a fire occurs in the underground shopping mall, the power outage will be made simultaneously with the fire. In this case, it is necessary to fully open the ventilation opening, that is, all the dampers A... A, and to quickly discharge the smoke to the outside.

In this case, conversely, when the damper A is opened, the motor 3 is further rotated in the opening direction to wind the spring 8 so that the damper A is opened when the spring 8 is unwound. What is necessary is just to change the winding direction of the mainspring 8 and the mounting position of the cam 101 with which the stopper 10 contacts.

[0038]

According to the damper actuator of the present invention, the operation of winding the mainspring by the motor using the planetary gear device formed by the combination of the internal gear and the spur gear is independent of the operation of opening and closing the vane of the damper. It is sufficient that the motor has the torque necessary to wind the mainspring, and the torque for opening and closing the vane of the damper besides the torque for winding the mainspring as in the prior art. Therefore, a small and inexpensive motor can be used without the need for a large motor that requires the above, and the manufacturing cost can be reduced.

Even if the mainspring is held in a compressed state, the operation of opening and closing the damper can be performed by forward and reverse rotation of the motor as in a normal actuator. When the mainspring is wound and unwound every time, the life of the mainspring is extended and there is no need to replace the mainspring over a long period of time. Once off
It is only necessary to observe whether all the dampers operate normally by setting to (power failure state), so repair and inspection are simple and convenient, and maintenance can be performed efficiently and economically. is there.

[Brief description of the drawings]

FIG. 1 is a front view of a damper to which the actuator of the present invention is attached.

FIG. 2 is a vertical sectional side view of the actuator.

FIG. 3 is a perspective view illustrating an internal structure of the actuator.

FIG. 4 is a vertical side view showing a relationship between a mainspring and an electromagnetic clutch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Actuator 2 Output shaft 3 Motor 4 Internal gear 5 Gear 6 Gear 7 Plate 8 Spring spring 9 Electromagnetic brake

Claims (1)

[Claims] 1. A damper which opens and closes a blade of a damper A by rotating an output shaft 2 connected to a rotation shaft for controlling opening and closing of a vane of the damper A forward and backward by driving a reversible rotation motor 3. Actuator 1 which pivotally supports an internal gear 4 which rotates independently of the output shaft by the rotation of a motor 3 on the output shaft 2, and inner peripheral teeth 41... 41 of the internal gear 4, The plate 7 is fixed to the output shaft 2 by pivotally supporting the gear 6 meshing with the outer teeth 51... 51 of the gear 5 pivotally supported by the output shaft 2 independently of the output shaft. A damper actuator provided with a spring 8 wound around the gear 5 by the rotation of the gear 6 and an electromagnetic brake 9 for controlling the rotation of a rotating shaft 81 for winding the spring 8; Ta.