JP7378316B2 - Electric opening/closing curtain rail protection device - Google Patents

Description

The present invention prevents the leading runner from moving in the direction of gravity due to the weight of the curtain fabric in an electric curtain rail installed at an inclined angle, and furthermore prevents the leading runner from moving due to the repulsive force caused by the folding of the curtain fabric when the curtain is fully opened. The present invention relates to an electric opening/closing curtain protection device that prevents such problems and protects the electronic circuit of the device from back electromotive force generated by a motor.

There is an electric opening/closing curtain rail that opens and closes the curtain electrically by installing a curtain runner that runs via a belt with an electric motor on the curtain rail and attaching the upper starting end of the curtain to the curtain runner. , the curtain runner is configured to be stopped by providing limit switches at the fully closed and fully open positions of the curtain, or an electromagnetic clutch is attached to the motor rotating shaft as in the invention of Patent No. 5553995 of the present applicant. However, the control circuit is configured to detect the rebound position after folding the curtain fabric at the initial setting and specify the fully open position of the curtain, or the leading runner is manually moved to the fully open position of the curtain. A method is used in which this position is stored in the control circuit as a fully open position.

The present invention relates to a protection device for an electric opening/closing curtain installed at an incline, in which the leading runner is affected by the load due to the curtain fabric's own weight at the fully open position of the curtain, or by the repulsive force load due to the folding of the curtain fabric when the curtain is fully opened, after the electric motor is stopped. In addition to preventing the position of the curtain from shifting, it also prevents the electric motor rotating shaft from rotating due to the load mentioned above, and at the determined fully open position, it is possible to provide a wider lighting area. In buildings with slanted windows of the same size made of curtains made of the same fabric and the same dimensions as the curtain rail, the fully open position will be the same for all windows without having to fine-tune the fully open position of the curtains individually. The purpose is to provide an electric curtain rail that can be opened and closed.

In other words, in an electric curtain rail installed at an angle, if the electromagnetic brake is not used after the motor stops, the weight of the curtain fabric or the repulsive force due to folding the curtain will be applied to the leading runner, and the leading runner will move after the motor stops. However, if the motor rotation shaft is rotated through a belt and a motor incorporates a gear, overload on the gear may cause damage to the gear, and if the motor rotates due to stress on the rotation shaft, the motor A back electromotive force is applied to the electronic circuit due to the rotation, which may cause damage to the electronic circuit.

In addition, when the curtain is moved to the fully open position by the force of the electric motor, the folded curtain fabric is loaded with stress due to the repulsive force and the curtain fabric's own weight, and after the electric motor stops, the leading runner is moved in the direction of the load. Force is added. Therefore, the position of the leading runner shifts every time the opening operation is performed, causing inconvenience and damage to devices such as electronic circuits, and potentially reducing durability.

Furthermore, in the case of a building where multiple slanted windows of the same shape are arranged adjacent to each other, from a design point of view it is necessary to adjust the fully open position of the curtains to the same position by using mechanical stoppers etc. on each curtain rail. There was a lot of complexity involved.

The present invention was made in view of the above-mentioned situation, and when there is no motor rotation command from the control circuit, the weight pressure of the curtain fabric installed on the inclined curtain rail and the repulsive force of the folded curtain fabric can be reduced. An electromagnetic brake is installed to prevent the motor shaft from rotating due to stress, and when the motor is stopped, the stress prevents the motor shaft from rotating and a back electromotive force from the motor is applied to the control circuit. In addition, as an initial setting function, the control device has a fully open position setting function that assumes the repulsion return movement distance of the curtain, that is, the first runner is moved from the curtain fully closed position by motor drive to the motor rotation stop detection or the motor is activated. The curtain rail is moved until the flowing overload current is detected, and the effective length of the curtain rail that the leading runner can move is measured from the position of the leading runner where the motor is stopped by a control circuit command. The fully open position is the value obtained by multiplying the rail effective length value by a constant in the range of 0.005 to 0.02 and subtracted in the closed direction from the value at the fully open position, so that the influence of the repulsive force of folding the curtain fabric when fully opened is smaller. An object of the present invention is to provide an electric opening/closing curtain rail protection device that can set the fully closed position as the fully closed position and set the fully open curtain position as close to the fully open side end of the curtain rail as possible.

The present invention provides an electric opening/closing curtain rail installed at an inclination, in which an electromagnetic brake and a rotation detector are installed on the rotating shaft of the electric motor, and the electric motor rotates in the forward direction (curtain release operation) or reverse direction (curtain closing operation). ) is operated by a control device to open and close the curtain, and the curtain is opened and closed by having its starting end attached to a curtain runner provided on a belt running by a pulley that is linked to the rotation of an electric motor. Fully open or close the curtains is instructed by the control device, and stop commands and operation speeds from fully open to fully closed, from fully closed to fully open, etc. are determined by the control device by receiving signals from the rotation detector. A signal is sent from the electromagnetic brake to connect and suppress the rotation of the electric motor. When the curtain is operated from a fully closed state to a fully open state, the fully open stop position is reached by the rotation detector detecting an overload stop or rotation stop of the electric motor, and the control device receives this signal and activates the electromagnetic brake. It will be done.

At this time, when the electromagnetic brake is activated, the curtain runner is folded, and the packed curtain elastically rebounds due to the thickness and mass of the fabric, applying stress to the leading runner. As a result, an overload is applied to the leading runner due to the inclination angle of the curtain rail and the weight of the curtain fabric, which may cause damage to the runner in the folded portion or slippage of the electromagnetic brake. These slips occur every time the curtain is fully opened, and their influence accelerates the deterioration of the device.
Therefore, the value of this return rotation calculated from the effective length of the curtain rail is stored in the control device as the repulsion return value, and from now on, when the curtain is fully opened, the position that takes into account the repulsion return stop position is set as the curtain full-open stop position. By doing so, it is possible to provide an electric opening/closing curtain device which is free from rebound and fluctuation and is preferable from a design point of view.

In addition, if the electromagnetic brake is activated when the electric motor is stopped, and if you forcefully pull the curtain while the electric motor is not opening or closing the curtain, the force will be applied to the electric motor's rotating shaft, overloading the electric motor. may generate a back electromotive force. If a back electromotive force is generated, there is a risk that the electronic circuit of the control device may be damaged or mechanical parts such as gears built into the electric motor may be damaged. When the motor is stopped, the electromagnetic brake is activated to prevent overload from being applied to the motor rotating shaft, which prevents failure of the control device due to back electromotive force, and prevents mechanical parts such as gears built into the electric motor. It can also prevent damage.

Furthermore, with the curtain fabric suspended, the leading runner is moved by a motor from the curtain fully closed position until the motor rotation is detected to have stopped or an overload current flowing through the motor is detected, and the leading runner is moved when the motor is stopped by a control circuit command. By multiplying the curtain rail effective length obtained by the position by a constant as the curtain fabric repulsion return value, and by subtracting the curtain fabric repulsion return value from the curtain rail effective length, the curtain rail fully open position is set. The fully open position can be determined without being affected by the weight of the curtain fabric or the installation inclination angle of the curtain rail. This means that in a building with multiple windows of the same shape, once the length of the curtain rail and the type of fabric are determined, the full opening position of the curtain can be determined from the open end of the curtain rail. That is, there is an advantage that the fully open positions of the curtains can be set in the same positional relationship without having to adjust the fully open positions of individual windows after installing the curtain rail.

In addition, for curtains installed at an angle, the ability to determine the fully open position of the curtain in a way that is not affected by the folding repulsion force of the curtain or the stress of the curtain's own weight has the advantage of providing a fully open position with a wider area of daylight from the window. There is.

Embodiments of the present invention will be described below based on the drawings.
1 to 4 show a state in which a control device 1 for an electric opening/closing curtain rail equipped with an electric opening/closing curtain rail protection device of the present invention, a curtain rail 2, and a curtain 3 are installed. The curtain 3 is suspended from the curtain rail 2 by a hanging tool 4, and a curtain runner 5 is provided at the starting end of the curtain hanging tool 4, in other words, at the starting end of the upper part of the curtain. This curtain runner 5 is connected to a belt 6 running inside the curtain rail.

The control device 1 includes an electric motor 7 shown in FIGS. 6 and 7, an electromagnetic brake 8 attached to the rotating shaft of the motor 7, a rotation detector 9, and a control section 10. The rotation detector 9 consists of a slit plate 12 attached to the output rotating shaft 11 of the electromagnetic brake 8 and a light sensor 13, and captures the train of light passing through the rotating slit plate 12 as a pulse signal, and detects the traveling distance of the belt 6. , detect the speed. An end of the output-side rotating shaft 11 is connected to a pulley 14 (FIG. 5) running on the belt 6.

The control unit 10 includes a motor drive circuit 15, an electromagnetic brake drive circuit 16, a signal input circuit 17 from the rotation detector 9, an operation signal input circuit 18, and a microcomputer 19. The microcomputer 19 analyzes input signals. Drive, stop, correction, and protection operations are performed.

The actual operation will be explained below based on the drawings.
When the curtain 3 is operated from the fully closed state as shown in Fig. 1 to the fully open state as shown in Fig. 2, the curtain 3 is compressed and folded in a jammed state by the driving force of the electric motor 7 as shown in Fig. 3, and the motor is turned off. Although the motor becomes overloaded, the rotation detector detects that the rotation has stopped and the motor is stopped by a command from the control circuit. The curtain 3 folded in a compressed and packed state has a repulsive return force from the folded state as shown by the arrow in FIG. Since the motor rotation shaft is directly connected to the output rotation shaft 11, the repulsive return force is directly applied to the motor rotation shaft as stress. Furthermore, if the curtain rail is installed at an angle, the mass of the curtain fabric will be applied to the motor rotation shaft via the output rotation shaft 11. Setting this position to the fully open position is not preferable because excessive stress will be applied to the rotary output shaft 11 and the curtain runner 5.
Therefore, the length from the fully closed position to the fully open stop position (curtain rail effective length) is analyzed and measured using the rotation detector 9, the signal input circuit 17, and the microcomputer 19.
Furthermore, in the fully open position at this point, the curtain fabric is in a compressed state and the rotary output shaft receives the pressure of the curtain's own weight due to the inclination, so in order to determine the true fully open position, the measured curtain rail effective length must be The value obtained by multiplying the length by a constant in the range of .01 to 0.007 and subtracting it from the value of the fully open stop position is defined as the true fully open position. Considering the ease of processing by the microcomputer 19, the constant is 1/64 or 1/128, but a nearby value may be used.
The true full-open position determined by this method is a position where there is a repulsive return force of the curtain fabric depending on the selection of constants, and a point where the repulsive return force gently influences the output rotation axis 9. The true fully open position of the engine will be determined.
Furthermore, by activating the electromagnetic brake 8 when the electric motor 7 is stopped by a command from the control unit 10, the pressure of the curtain fabric's own weight in the case of an inclined installation can be reduced.
The curtain runner 5 can stand still at the stop position without being affected by the reduced repulsive force of the curtain fabric.

When the curtain 3 is in a stationary state, the load due to the weight of the curtain fabric caused by the inclined installation of the curtain rail 2 acts as a stress that makes it impossible to maintain the curtain runner 5 stationary. Not only does this affect the curtain runner 5 in the form of stress, but it also causes damage to the gear built into the electric motor 7 , or a back electromotive force is generated from the electric motor 7 due to forced rotation of the electric motor 7 , causing the control unit 10 to be damaged. It will cause damage. In order to prevent such a situation, when the electric motor 7 is stopped by a command from the control unit 10, the electromagnetic brake 8 is activated at the same time to prevent the movement of the curtain runner 5, and the electric motor 7 and the control unit 10 are also activated. protect from damage.

To open and close the curtain 3, the operation signal input circuit 18 receives an input signal from the remote controller input unit 20, and the motor drive circuit 15 rotates the electric motor 7 in the forward or reverse direction based on a command from the microcomputer 19. This is done by

To set the curtain 3 to the fully closed position, as shown in FIG. 9, the electromagnetic brake 8 is released, the motor 7 is energized, the electric motor 7 is driven, the curtain 3 is fully closed, and the rotation detector 9 is stopped. By registering the position, the electric motor 7 is de-energized and the electromagnetic brake 8 is activated at the same time.

As shown in FIG. 10, the fully open curtain position is set by driving the electric motor 7 by energizing the electric motor 7 while the electromagnetic brake 8 is released. This is done by stopping the curtain 3 at the fully open position, turning off the electric motor 7 when the rotation detector 9 stops, and activating the electromagnetic brake 8 at the same time. When the electromagnetic brake 8 is actuated, the curtain 3 of the curtain runner 5 is compressed and folded by the force of the electric motor 7, and the folded curtain 3 elastically rebounds back as shown in FIG. The true fully open position is determined from the effective length of the curtain rail by the initial setting operation, and then the stop position at this true fully open position is registered as the stop position when fully opened, so that the curtain 3 is compressed and folded by the force of the motor 7 when fully open. A position where the stress is weak or has no effect can be set as the fully open stop position. Therefore, the fully open position of the next curtain 3 is determined by the effective length of the curtain rail. When the length of the curtain rail and the number of runners to which the curtain fabric is attached are the same, almost the same position can be set to the fully open position even if the windows are different.

In addition, since the fully open position can be determined at a position where the curtain folding repulsion force is weak, the fully open position of the curtain can be set closer to the fully open end of the curtain rail. This reduces the area where the window is covered by the curtain fabric when the curtain is fully opened. There are features that allow it to be made smaller.

Diagram of fully closed curtain Diagram of fully open curtains An explanatory diagram of the curtain being compressed and folded by the power of an electric motor. Explanatory diagram of the state where the curtain rebounds back Interior view of curtain rail Explanatory diagram of control device Explanatory diagram of control device Control device configuration block diagram Curtain fully closed position registration mode explanatory diagram Curtain fully open position registration mode explanatory diagram Motor overload protection flowchart diagram

1: Control device 2: Curtain rail 3: Curtain 4: Hanging tool 5: Curtain runner 6: Belt 7: Electric motor 8: Electromagnetic brake 9: Rotation detector 10: Control unit 11: Output rotation axis 12: Slit plate 13 : Optical sensor 14: Pulley 15: Motor drive circuit 16: Electromagnetic brake circuit 17: Signal input circuit 18: Operation signal input circuit 19: Microcomputer 20: Remote controller input section

Claims (2)

In the electric opening/closing curtain rail, which opens and closes the curtain by running the leading runner installed at the hanging start end of the curtain via a belt using an electric motor, a rotation detector is installed to detect the rotation speed and presence/absence of rotation of the motor rotation shaft. In order to prevent the motor rotation shaft from rotating due to the weight pressure of the curtain fabric installed on the slanted curtain rail or the repulsive force of the folded curtain fabric when there is no motor rotation command from the control circuit. In addition to applying the brake, in the initial settings when installing the curtain rail, the first runner is driven by the motor with the curtain fabric suspended from the curtain fully closed position until the motor rotation is detected to have stopped or an overload current flowing to the motor is detected. The effective length of the curtain rail that the first runner can move is measured based on the position of the first runner when the motor is stopped by the control circuit command, and a constant is set to the effective length of the curtain rail by taking into account the rebound return distance of the folded curtain fabric. An electric opening/closing curtain rail protection device characterized in that the fully open position is the value obtained by subtracting the value obtained by multiplying the value by the value in the closing direction from the value at the fully open position. By stopping the electric motor in response to a command from the control circuit and activating the electromagnetic brake at the same time, the motor can absorb the load due to the weight of the curtain fabric that occurs when the curtain rail is installed at an angle, or the load due to the repulsive force caused by folding the curtain fabric when the curtain is fully open. This prevents stress from being applied to the rotating shaft and protects the electronic circuit from the back electromotive force generated when the motor rotating shaft rotates due to the weight of the curtain fabric and the stress of the folding repulsion force of the curtain fabric. 2. The electric opening/closing curtain rail protection device according to claim 1, wherein the device prevents displacement of the leading runner after it comes to a standstill due to weight or repulsive force of folding curtain fabric.