JPH08177343A - Electric blind driving method - Google Patents

Abstract

PURPOSE: To prevent any vertical shaking at the stop of a blind by forcing the stopping motion of a stepping motor, rotating and driving a latter code pulley, into deenergization after it is tuned to a state of being held or decelerated as long as the specified time. CONSTITUTION: In the case where a stepping motor 4, driving three lifting units 6, 7 and 8 having a blind 20 opened or closed, is operated and its lifting motion is stopped, excitation in this stepping motor 4 is turned to OFF after the elapse of a holding state by monophasic excitation of less than 0.5sec or a slowdown state of less than 0.5sec. In this connection, this program is built in a control circuit 3 in advance. In this case, in order to cope with this sudden excitation off, it is recommendable that large inertia is made so as not to occur and any slippage not to be produced in the motor 4, respectively. With this constitution, any vertical shaking of the blind in time of stoppage is thus preventable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving an electric blind, and more particularly to a novel improvement for preventing a vertical swing generated when the blind is stopped and obtaining a stable stop.

[0002]

2. Description of the Related Art In an electric blind drive method of this type which has been used conventionally, when a blind is stopped, a drive controller receives a signal of a stop command from a blind controller, and at the same time, the input pulse to a stepping motor is received. Was turned off and stopped.

[0003]

Since the conventional electric blind drive method is configured as described above, the following problems exist. That is, when the blind is stopped from the operating state, from the viewpoint of the motor, pulses that have been continuously input until now are suddenly cut off. At that time, the blind load must withstand the non-excitation torque of the motor by the output shaft torque through the gear head. However, in this case, a large inertia occurs, the blade of the blind sways greatly up and down, and if the motor torque is small, the inertia force causes a slip and the blade descends.

The present invention has been made in order to solve the above problems, and in particular, an electric blind drive method for preventing a vertical swing which occurs when a blind is stopped and obtaining a stable stop. The purpose is to provide.

[0005]

According to the blind driving method of the present invention, a blind is hung on a plurality of lifting units in a headbox via a ladder cord and a lifting tape, and the lifting units are driven by a stepping motor. In the electric blind drive method described above, the stepping motor is brought into a hold state or a deceleration state and then deenergized to stop the elevation of the blind.

More specifically, the hold state and deceleration state are set to 0.5 seconds or less.

[0007]

In the electric blind drive method according to the present invention, when the blind is stopped, the stepping motor is stopped after the hold state or deceleration state of 0.5 seconds or less, and then the blind is almost swayed. It is possible to obtain a stable stop state without any problem.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the electric blind driving method according to the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 15 is a head box provided on a wall (not shown) or the like, and inside the head box 15, a plurality of lifting units 6, 7, 8 are arranged at predetermined intervals. The hoisting shaft 12 provided and connected to each of the lifting units 6, 7, and 8 has a pulley 6a,
7a and 8a are provided.

A bottom rail 14 and a slat 1 are attached to each of the pulleys 6a, 7a, 8a through a lifting tape 10 and a ladder cord 11 or only the ladder cord 11.
3 is suspended.

An end 12a of the winding shaft 12 is connected to a stepping motor 4 via a coupling 5, and a power cord 1 and a controller 2 are connected to the stepping motor 4 via a control circuit 3. There is. In addition, a rotation sensor (not shown) made up of a photo interrupter having a simple structure is built in the stepping motor 4, and a rotation signal of one rotation / one pulse method from the rotation sensor is input to the control circuit 3. Stepping motor 4
Is configured to be detected as normal or abnormal.

Next, the operation will be described. First, the blind (consisting of slats 13 and bottom rails 14) 2
When stopping the lifting and lowering of 0, instead of suddenly turning off the excitation as in the conventional case, the stepping motor 4 is set to 0.5.
By turning off the excitation (by the control circuit 3) after the hold state by the one-phase excitation for less than a second or the slowdown state for less than 0.5 seconds, the upper and lower sides of the blind 20 are turned off as shown in FIG. There is minimal or almost no sway, and it can be stopped without stepping out and slipping. It should be noted that this control program is built in the control circuit 3 in advance.

[0012]

Since the electric blind drive method according to the present invention is configured as described above, the following effects can be obtained. That is, when the blind is stopped, the hold state or stop holding is performed before the stop, so the swing of the blind at the time of stop is prevented, the stable stop prevents stepping of the stepping motor, and the appearance operation is extremely aesthetic. Is to be presented.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an electric blind driving method according to the present invention.

FIG. 2 is an explanatory diagram showing a stopped state of FIG.

FIG. 3 is an explanatory diagram showing a conventional stopped state.

[Explanation of symbols] 4 stepping motor 6, 7, 8 lifting unit 10 lifting tape 11 ladder coat 20 blind

Claims (2)

[Claims] 1. A blind (20) is hung from a plurality of lifting units (6, 7, 8) in a head box (15) via a ladder cord (11) and a lifting tape (10) to provide the lifting unit. In the electric blind drive method in which (6, 7, 8) is driven by a stepping motor (4), the blind is generated by deactivating the stepping motor (4) after holding it in a hold state or decelerating state. (20) An electric blind drive method characterized by stopping the lifting and lowering of (20). 2. The hold state and deceleration state are 0.
The electric blind drive method according to claim 1, wherein the method is set to 5 seconds or less.