JP2709441B2 - Control method of electric shutter and manual switching device of electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method of an electric shutter and a manual switching device of the electric shutter.

[0002]

2. Description of the Related Art Generally, shutters are provided at entrances of stores and warehouses, etc. Recently, shutters which can be opened and closed lightly by using a spring balance have been proposed, and electric shutters have been developed. I have.

In such an electric shutter, a driving motor is built in the winding drum, a pinion gear is provided on an output shaft of the driving motor, an internal gear is provided on a wheel on the winding drum side, and the internal gear and the pinion gear are connected to each other. And the take-up drum is rotated / reversely rotated so that the motor output shaft is braked when the drive motor stops at the upper and lower limits of the shutter. When this occurs, the motor output shaft is being braked,
The shutter cannot be opened and closed.

Therefore, in a conventional electric shutter, a pinion gear is slidably fitted in the motor output shaft in the axial direction, and a flange and a spring member are provided behind the pinion gear. In the event of a power failure or motor failure, the wire is pulled to slide the flange against the biasing force of the spring member to release the mesh between the pinion gear and the internal gear, A method that allows manual opening and closing has been proposed (for example, see Japanese Utility Model Publication No. 4-55198).

By the way, in this type of electric shutter,
The lower limit position of the shutter is detected by the limit switch, and the motor output shaft is braked. However, the upper limit position of the shutter is raised, and the shutter seat plate comes into contact with the magsa on the shutter case side to limit the rise, and the shutter is taken up. Generally, a method of braking a motor rotating shaft when a drive motor is forcibly stopped by being wound around a drum is generally adopted.

[0006]

However, in the electric shutter described in the above-mentioned conventional publication, when the drive motor is stopped at the upper limit position of the shutter, the drive motor is braked in an overload state in which the shutter is wound, and the pinion gear and the pinion gear are stopped. Since the internal gear and the internal gear are firmly meshed with each other, the pinion gear is hardly disengaged from the internal gear, and switching to manual operation may be difficult. For this reason, when switching to manual operation, switching is performed while releasing the braking of the motor output shaft. However, there is a problem that the releasing operation of the braking is heavy and operability is poor.

Further, since the pinion gear is slid and meshed with the internal gear, it is difficult to smoothly mesh the pinion gear with the internal gear when switching from manual operation to electric operation. For this reason, it is necessary to machine the tip portion of each tooth of the pinion gear into a tapered shape, and there is a problem that the machining is complicated and the cost is increased.

The present invention has been made in view of the above problems, and does not require complicated processing of gears in an electric shutter.
An object of the present invention is to make it possible to reliably and smoothly switch between electric and manual operation with a simple operation.

[0009]

Means for Achieving the Object The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, after the drive motor was forcibly stopped at the upper limit position of the shutter, the output shaft was tightened unless braking was applied. Focusing on the fact that the shutter is slightly returned, the overload of the drive motor is reduced, and the meshing between the pinion gear and the internal gear can be loosened. Focusing on the fact that a disk clutch is provided between the gear and the motor output shaft so that this can be connected and disconnected only by pulling the operation wire, the switching operability can be greatly improved, and the present invention has been completed. Was.

That is, in the control method of the electric shutter according to the present invention, the take-up drum is rotated and reversed by the drive motor to wind up the shutter, and the motor output shaft is braked when the drive motor is stopped. In the case of an electric shutter that allows manual opening and closing of the shutter by releasing the connection between the motor and the take-up drum, the control
The drive motor is controlled to rotate / reverse by the
The detection sensor detects the rotation of the drive motor,
The upper limit of the shutter on the road based on the signal of the rotation detection sensor
Stops the drive motor at the position
It is characterized in that the braking mechanism is actuated in addition .

In the manual switching device for an electric shutter according to the present invention, a pinion gear provided on an output shaft of a drive motor with a built-in winding drum meshes with an internal gear of the winding drum to rotate the winding drum. reversed out winding up the shutter, the electric shutter so as to brake the motor output shaft by the braking mechanism when it stops the drive motor, drive
A rotation detection sensor that detects the rotation of the motor, and an operation command
Rotation and reverse rotation of the drive motor in accordance with
Drive at the upper shutter position based on the signal from the rotation detection sensor.
The stop of the motor is detected, and a predetermined time delay
A control circuit for operating the braking mechanism , a disk clutch is provided between the pinion gear and the drive motor output shaft, and the disk clutch is urged in the connecting direction by a spring member, and the operating arm resists the urging force of the spring member. The operation arm is operated by pulling the operation wire, and the guide pin provided on the operation arm is guided by the cam from the connection allowable position of the disk clutch to the disconnection position and locked at the disconnection position, The lock of the guide pin by the cam is released by the pulling operation of the next operation wire, and the guide pin is guided to the connection allowable position by the urging force of the spring member.

[0012] disc clutch may be a friction disk type, in order to switch to smoothly connect the secured and cut a secure connection has preferably the fitting method between a clutch pin and the clutch hole.

[0013]

According to the electric shutter control method of the present invention, when the drive motor is operated, the winding drum is rotated or reversed, and the shutter is wound or unwound and opened and closed. . When the shutter is tightened at the shutter upper limit position and the drive motor is forcibly stopped,
The braking of the motor output shaft is started with a predetermined time delay.

Therefore, the shutter that has been tightened returns slightly before the braking is started, and the overload of the drive motor is reduced, and the strong engagement of the drive system gear is loosened. The connection between the drums can be released lightly,
It is possible to reliably and smoothly switch from electric to manual.

According to the manual switching device for an electric shutter according to the present invention, when the operation wire is pulled, the operation arm disconnects the disk clutch, and the guide pin of the operation arm is guided to the disconnection position of the disk clutch by the cam. And locked. Next, when the operation wire is pulled, the lock of the guide pin by the cam is released,
The guide pin is guided to the connection allowable position of the cam by the urging force of the spring member, the operation arm returns to the initial position, and the disc clutch returns to the connected state.

As described above, since the disk clutch provided in the driving force transmission system is connected and disconnected, switching from manual operation to electric operation can be performed more smoothly than when the driving system gear is slid and engaged. A complicated gear taper process as in the device described in the conventional publication is not required. In addition, since a cam and a guide pin are provided and the disk clutch is connected and disconnected only by pulling the operation wire, a complicated braking release operation at the time of electric switching as described in the conventional publication is unnecessary. Operability can be greatly improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the accompanying drawings. 1 to 8 show a device for mounting a take-up drum of a shutter according to an embodiment of the present invention. In the figure, a fixed shaft 10 is attached to a shutter case, and a winding drum (not shown) meshes with an internal gear 11 and a plurality of pinion gears 12 on the fixed shaft 10 side on the outer periphery of the fixed shaft 10. It is supported so that it can rotate.

A drive motor 13 is fixed above the fixed shaft 10 by a bracket 131, a controller (control circuit) 14 is mounted on the rear side of the fixed shaft 10, and a lower limit switch is provided below the fixed shaft 10. 15 are attached. The rear end of the rotary shaft 130 of the drive motor 13 is provided with a braking mechanism 16 for braking the same, a Hall IC 23 for detecting rotation is provided, and the front end of the rotary shaft 130 is connected to the input shaft of the speed reducer 17. 170.

One of the pinion gears 12 is provided coaxially with the output shaft 171 of the speed reducer 17 above the distal end of the fixed shaft 10, and is provided between the pinion gear 12 and the output shaft 171 of the speed reducer 17. Is provided with a disk clutch 18. In this disk clutch 18, one of the disks 1
80 is formed integrally with the pinion gear 12, and the other disk 181 is spline-engaged with the outer periphery of the output shaft 171 of the speed reducer 17 so as to be slidable in the axial direction.
A clutch hole 182 is formed at every 80 ° in the circumferential direction at 80, and a clutch pin 183 that fits into the clutch hole 182 is projected at the other disk 181.

The bracket 131 of the drive motor 13
The operation arm 19 is swingably mounted on the second arm 181, and the projection 192 of the operation arm 19 is engaged with the rear annular recess of the other disk 181 so as to allow rotation, and the disk 181 is connected to the output shaft 171. A coil spring 20 for urging the disk 181 in the direction of connection with the disk 180 is compressed between them.

One end of an operation wire 220 of the wire assembly 22 is connected to the operation arm 19, and the other end of the operation wire 220 reaches the outside of the apparatus via the rotating shaft 10.

A guide pin 191 is provided on the operation arm 19 so as to be able to protrude and retract, and is urged in a projecting direction by a spring member (not shown), and a cam 131 for guiding and locking the guide pin 191 on a bracket 131 of the drive motor 13. Are swingably mounted. This cam 21 is shown in FIGS.
As shown in FIG. 5, the leading edge is formed in an arc shape, a substantially L-shaped guide groove 210 is formed in the center, a tapered escape surface 211 is formed on the upper end side of the guide groove 210, and the cam 21 is linear. It is urged to swing by a spring 212 and positioned by a stopper 213.

FIG. 8 is a functional block diagram of the controller 14. In the figure, 30 is a push button switch for opening and closing the shutter, 31 is a start command means for receiving a signal from the push button switch 30 and issuing a motor start command, and 32 is a motor stop command for receiving a signal from the push button switch 30. Is a motor stop detection avoiding means for receiving the motor start command and avoiding detection by the motor stop detecting means 36 until the drive motor 13 reaches a predetermined rotation, and 34 is a motor start command or a motor stop command. Motor start / stop means 35 for generating a motor start start signal or a motor stop start signal of the drive motor 13
Is a motor control circuit that operates and stops the drive motor 13 with a motor start start signal or a motor stop start signal as input, and 23 is a Hall I that detects rotation of the drive motor 13.
C and 36 are motor stop detecting means for detecting the stop of the drive motor 13 from the signal of the Hall IC 23.

Reference numeral 37 denotes a lower limit stop command unit which receives a signal from the lower limit switch 15 and issues a lower limit stop command, and 38 denotes a brake return command in response to a command from the stop command unit 32 or the lower limit stop command unit 37. Brake reset means 39 which issues a brake delay return means 39 which receives a signal of the motor stop detection means 36 and issues a brake return command with a delay of a predetermined time, for example, 0.5 seconds after the motor stops, and 40 denotes a brake start which receives a brake return command Brake starting means for issuing a signal; 41, a motor stop level adjusting circuit for adjusting the stop level of the drive motor 13 to eliminate a drop of the shutter due to the mounting state, etc .; This is a brake control circuit that operates the mechanism 16.

Next, the operation will be described. To open the shutter in the fully closed state, open the push button switch 3
When 0 is turned on, a drive signal is output from the controller 14 and the drive motor 13 rotates, which is reduced by the speed reducer 17 and transmitted to the winding drum via the disk clutch 18, the pinion gear 12 and the internal gear 11, The shutter is wound on the winding drum and opened.

At this time, the rotation of the motor rotation shaft 130 is detected by the Hall IC 23, the shutter reaches the upper limit position, is wound around the winding drum, and the drive motor 13 is forcibly stopped. The output of the drive signal is stopped, and the power supply to the drive motor 13 is stopped. When the controller 14 detects the forced stop of the drive motor 13, a drive signal is output with a delay of a predetermined time, for example, 0.5 seconds after the rotation of the motor rotation shaft 130 is stopped, and the braking mechanism 16 The rotating shaft 130 is braked.

In such a state, the shutter slightly returns between the time when the drive motor 13 is forcibly stopped and the time when braking is applied, and the meshing between the pinion gear 12 and the internal gear 11 is loosened so that the gear is not firmly meshed.

To close the shutter, when the close-side push button switch 30 is turned on, a drive signal is output from the controller 14, the drive motor 13 rotates in the reverse direction, and the shutter is unwound from the winding drum and closed. When the shutter reaches the lower limit position and the stop is detected by the lower limit switch 15, the drive signal from the controller 14 is stopped, and the power supply to the drive motor 13 is stopped.
At the same time, the controller 14
Is braked.

If the shutter is closed and hits some obstacle and stops, the Hall IC 23 detects the forced stop of the drive motor 13 and the controller 14 stops energizing the drive motor 13. When the controller 14 detects that the drive motor 13 is forcibly stopped, the motor rotation shaft 130 is braked for a predetermined time, for example, 0.5 seconds after the rotation of the motor rotation shaft 130 is stopped. Therefore, even when there is an obstacle, strong engagement between the pinion gear 12 and the internal gear 11 is prevented.

By the way, in the above-mentioned electric state, as shown in FIG.
1 is urged by a coil spring 20 to swing forward, and a clutch pin 183 is fitted into a clutch hole 182 of the disc clutch 18 so that the disc clutch 18
Is connected. The guide pin 191 of the operation arm 19 is in contact with the arcuate edge of the front end of the cam 21 and protrudes outward by a spring member.

In the case of switching from the electric operation to the manual operation, when the operation wire 220 is pulled, the operation arm 19 swings rearward against the urging force of the coil spring 20, and the clutch pin 183 is pulled out from the clutch hole 182 and the disc is released. The clutch 18 is disconnected.

The guide pin 191 moves rearward due to the swinging of the operating arm 19 rearward, whereby the cam 21 swings outward against the urging force of the wire spring 212,
When the guide pin 191 reaches the opening of the guide groove 210 of the cam 21, as shown in FIGS.
The guide pin 191 is housed in the guide groove 210 of the cam 21 and locked at a corner thereof.

Accordingly, the disk clutch 18 is locked in the disengaged state, the driving force transmission path from the driving motor 13 to the pinion gear 12 is cut off, and the pinion gear 12 can rotate freely, so that the shutter can be opened and closed manually.

On the other hand, when returning to electric operation, when the operation wire 220 is further pulled, the operation arm 19 is moved to the position shown in FIG.
The guide pin 191 swings further backward from the state shown in (a), moves backward in the guide groove 210 of the cam 21, and
When the cam 21 reaches the rear end of the guide groove 210, the cam 21
12, the guide pins 1
When the operation wire 91 is moved to the side of the release surface 211 and the lock by the cam 21 is released as shown in FIG. 7B and the operation wire 220 is loosened, the operation arm 19 swings forward by the urging force of the coil spring 20. The disc clutch 18 is connected after returning to the original state, and the guide pin 191 is guided while being pushed inward by the release surface 211 of the cam 21 as shown in FIG. , Protruding outward and returning to the initial state.

When the clutch pin 183 and the clutch hole 182 are misaligned, the other disk 181 is rotated by the rotation of the drive motor 13, and when the clutch pin 183 and the clutch hole 182 match, the coil spring 20 The biasing force causes the clutch pin 183 to be fitted into the clutch hole 182, thereby reliably returning to electric power.

Therefore, when the pulling operation of the operation wire 220 is repeated, the cam 21 guides the guide pin 191 between the connection allowable position and the disconnection position and locks the disconnection position, and the disk clutch 18 is connected and disconnected. As a result of being switched between electric and manual, a complicated braking release operation at the time of electric switching as described in the conventional publication is unnecessary,
Switching operability can be greatly improved.

Further, since switching between electric and manual operation is performed by connecting and disconnecting the disk clutch 18, the switching from manual operation to electric operation can be performed more smoothly than in a case where the drive system gear is slid and engaged. This eliminates the need for complicated gear tapering as in the device described in the conventional publication.

Further, when the drive motor 13 is stopped at the upper limit position of the shutter and when there is an obstacle during the descent of the shutter, the motor rotating shaft 130 is braked with a delay, so that it is wound around the winding drum. The shutter is slightly returned, the overload of the drive motor 13 is reduced, and the engagement between the pinion gear 12 and the internal gear 11 is loosened, so that the disc clutch 18 can be lightly disengaged. Switching can be performed smoothly.

Next, the operation of the controller 14 will be described. The controller 14 is composed of a microcomputer and performs various processes according to a program. Here, for convenience, a description will be given with reference to the flow of FIG. 9 based on a functional block diagram shown in FIG. When the push button switch 30 is turned on to the closing side, a start command is issued from the start command means 31, and in response to this, a motor start start signal is output from the motor start / stop means 34, and the motor control circuit 35 13 (steps S3 to S4, S
6 to S8).

When the shutter reaches the lower limit, the lower limit of the shutter is detected by the lower limit switch 15 and the lower limit stop command means 37 to the motor start / stop means 3.
A motor stop start signal and a lower limit stop command are issued to the brake control means 4 and the brake return means 38, and a motor control circuit 35 is issued from the motor start / stop means 34 to stop the drive motor 13, and at the same time, the brake start means 4
A brake start signal is output from 0, and the brake control circuit 42 activates the braking mechanism 16 to brake the motor rotating shaft 130 (see steps S9, S18, S19).

On the other hand, the push button switch 30 is turned on to the open side.
Then, an opening start command is issued from the start command means 31, and the drive motor 13 is operated (steps S3 to S3).
5, S7, S8). When the shutter reaches the upper limit position, the shutter is wound around the winding drum and the drive motor 13 is forcibly stopped, a stop detection signal is issued from the motor stop detection means 36 in response to a signal from the Hall IC 23, and the drive motor 13 is stopped (step S
9 to S14).

The brake delay return means 39 receives a stop detection signal and issues a brake return command after a predetermined time, for example, 0.5 seconds, has elapsed since the drive motor 13 was stopped. A brake start signal is output to the control circuit 42 and the motor rotation shaft 13
0 is delayed by a delay time (steps S15 to S15).
See S17).

When the push button switch 30 is turned off while the shutter is being opened and closed as described above, a motor stop start signal is issued from the motor start / stop means 34 based on a command from the stop command means 32, and at the same time, Based on a stop start command from the stop command means 32, the brake return means 3
8, a brake return command is issued and the drive motor 13
Is stopped, and the motor rotating shaft 130 is braked (see steps S10, S18, S19).

If the shutter hits an obstacle during the closing operation of the shutter, the drive motor 13 is forcibly stopped, and the Hall IC 23 detects this, and the Hall IC 23 detects it.
3, a stop detection signal is issued from the motor stop detection means 36, and the energization of the drive motor 13 is stopped.
After a predetermined time has elapsed, the motor rotating shaft 130 is braked (see steps S11 to S17).

When initializing the controller 14 in advance, necessary settings such as the shutter stop position are made (see step SLS2).

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a configuration for manually switching an electric shutter according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional side view showing a main part of the manual switching device.

FIG. 3 is an exploded perspective view showing a structure near a cam and an operation lever in the manual switching device.

FIG. 4 is an exploded perspective view showing a structure near the internal gear 11 in the manual switching device.

FIG. 5 is a plan view showing a state in which the manual switching device is electrically operated.

FIG. 6 is a plan view showing a state in which the manual switching device is switched from electric to manual.

FIG. 7 is an enlarged view for explaining a state in the middle of switching from manual to electric in the manual switching device.

FIG. 8 is a functional block diagram showing a controller in the manual switching device.

FIG. 9 is a diagram showing a processing flow of a controller in the manual switching device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Internal gear 12 Pinion gear 13 Drive motor 130 Rotating shaft 14 Controller 15 Lower limit switch 16 Braking mechanism 18 Disk clutch 180 Disk 181 Disk 182 Clutch hole 183 Clutch pin 19 Operation arm 191 Guide pin 20 Spring member 21 Cam 220 Operation wire 23 Hall IC 30 push button switch

Claims (3)

(57) [Claims] 1. A drive motor rotates and reverses a take-up drum to take up and unwind a shutter, brakes a motor output shaft when the drive motor is stopped, and releases a connection between the drive motor and the take-up drum. In a motorized shutter that allows the shutter to be opened and closed manually, the control circuit rotates the drive motor in response to an operation command.
While controlling reverse rotation, the rotation detection sensor rotates the drive motor.
Rotation is detected, and the control circuit detects the signal of the rotation detection sensor.
Detection of the stop of the drive motor at the shutter upper limit position based on the
The brake mechanism with a predetermined time delay.
A method for controlling an electric shutter, characterized in that the control is performed. 2. A drive motor, wherein a pinion gear provided on an output shaft of a drive motor with a built-in take-up drum meshes with an internal gear of the take-up drum to rotate and reverse the take-up drum to take up and unwind a shutter. A rotation detection sensor for detecting the rotation of the drive motor, and a rotation / reverse rotation control for the drive motor in response to an operation command.
The upper limit of the shutter based on the signal from the rotation detection sensor
The stop of the drive motor at the position is detected and a predetermined time delay
A control circuit for operating the braking mechanism; a disk clutch provided between the pinion gear and the motor output shaft for connecting and disconnecting the transmission of driving force; and a spring for biasing the disk clutch in a connection direction. An operation arm having a member, a guide pin, and being operated by an operation wire to disconnect the disk clutch against the urging force of a spring member; and Is guided from the connection allowable position to the cutting position and locked at the cutting position, the lock of the guide pin by the cam is released by the pulling operation of the next operation wire, and the connection of the guide pin is permitted by the urging force of the spring member. A manual switching device for an electric shutter, comprising: a cam for guiding to a position. 3. The manual switching device for an electric shutter according to claim 2, wherein the disk clutch is connected by fitting a clutch pin of one disk into a clutch hole of the other disk, and is disconnected by disengagement thereof.