JPH04204925A - Motor-driven screen device - Google Patents

Abstract

PURPOSE:To accomplish the opening/closing of a screen without looseness by providing a control means which controls so that a motor on a main driving side which opens/closes the screen may generate larger torque than a motor on a follower driving side which adds tension force. CONSTITUTION:A 1st rotating roll 1 takes up the screen 6 and gives the torque in a direction alpha where the screen 6 is always opened by a 1st motor 3. A 2nd rotating roll 2 where a wire 7 connected with the leading edge part of the screen 6 is fixed gives the torque in a direction beta where the screen 6 is always closed by a 2nd motor 4. The 1st motor 3 achieves two kinds of torque, large torque and small torque, according to the control by the control means and generates the large torque in the case of opening the screen 6 and the small torque in the case of closing the screen 6. The 2nd motor 4 gives the tension force to the screen 6 with the small torque when the 1st motor 3 generates the large torque, and when the motor 3 generates the small torque, it generates the large torque so as to develop the screen 6.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention automatically constructs a screen installed in a horizontal direction substantially parallel to a ceiling surface or in a direction inclined to a ceiling surface using the driving force of a motor. This invention relates to an electric screen device that can be rolled up.

[Conventional technology]

Conventionally, various screens have been developed and used, for example, for indoor partitions, decorations, overhead projectors (O)TPs, and the like.

For such screens, electric screen devices have also been developed that automatically wind up the screens using the driving force of a motor. Generally, this electric screen device is configured such that the upper end of the screen is fixed to a roller having a built-in motor, and the screen is wound around the upper roller.

In addition, such an electric screen device includes, for example, a fifth
As shown in the figure, some devices are used in sunny rooms where transparent materials such as glass are attached to the side walls or ceiling to block sunlight from entering from the ceiling. That is, this type of electric screen device has a configuration in which a pair of rollers 100, 101 are arranged on the ceiling side, and a screen 102 is stretched between these rollers 100, 101. For example, as shown in FIG. As shown, the driving force of a motor 103 built into one roller 100 allows the screen 102 to be wound up against the elastic force of a torsion spring 104 attached to the other roller 101.

[Problem to be solved]

By the way, in electric screen devices with such a configuration, since the elastic force of the torsion spring is used as a means of applying tension to the screen, there is a limit to the amount that the screen can be opened and closed, so it is difficult to It is unsuitable for screens over long spans.

Furthermore, in the case of such an electric screen, after long-term use, the elastic force of the torsion spring may weaken, causing the screen to loosen, resulting in a lack of durability.

Therefore, in view of the above-mentioned conventional drawbacks, the present invention provides that even if the screen is installed horizontally or in an inclined direction,
It is an object of the present invention to provide an electric screen device that does not allow the screen to loosen over a long period of time and can set a large opening/closing amount of the screen.

[Means to solve the problem]

That is, the invention according to claim 1 is an electric screen device that winds up a screen installed in a horizontal direction substantially parallel to a ceiling surface or in a direction inclined to the ceiling surface, the electric screen device winding up a screen installed on each end side of the screen. a pair of rotating rolls arranged parallel to each other and facing each other; a pair of motors provided on each of these rotating rolls and applying tension to the screen while rotating in fixed opposite directions; Alternatively, it is equipped with a control means for controlling the driving force of these motors so that the motor on the driving side that closes the screen generates a larger torque than the motor on the driven side that applies tension to the screen. .

The electric screen device according to claim 2 also operates the driven motor of the pair of motors a predetermined time later than the main motor when starting the opening or closing operation of the screen. A delay means is provided for stopping the driven side by a predetermined time later than the driving side when the opening or closing operation is completed.

[Effect]

The electric screen device according to claim 1 of the present invention applies tension to the screen by pulling both ends of the screen in opposing directions by motors that constantly rotate in reverse, and also opens the screen by a control means. Alternatively, the torque of the motor (on the driving side) in the direction in which the screen is to be closed is controlled to be greater than the torque of the motor on the other side (the driven side), thereby allowing the screen to open or close without causing slack. Can be closed.

Further, in the electric screen device according to claim 2 of the present invention, the timing of starting and stopping the operation of each motor is slightly shifted by the delay means. For example, when the screen is opened,
By operating the driven motor for a predetermined period of time later than the main driving motor that opens the screen, it is possible to prevent the screen from becoming loose when it is opened.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an electric screen device according to the present invention. The first roller provided on the second rotating rolls 1 and 2. It is equipped with second motors 3 and 4, a control means (circuit), and a delay means (circuit), and in this embodiment, it is installed in a sunny room made of glass on the ceiling surface 5 shown in FIG. There is.

In the figure, reference numeral 6 indicates a screen, and 7 indicates a wire connected to the tip of the screen 6.

The first rotary roll is fixed to the base end of the screen 6, and torque is applied by the first motor 3 in the direction of winding up the screen 6, that is, in the direction α that keeps the screen 6 open. There is.

The second rotating roll 2 fixes a wire 7 connected to the tip of the screen 6, and fixes the wire 7 connected to the tip of the screen 6 by the second motor 4. Torque is applied in the direction β in which the screen 6 is expanded, that is, in the direction β in which the screen 6 is always closed.

The first motor 3 is configured to exert two types of torque, large and small, under the control of the control means. In other words, when opening the screen 6 (opening mode), the first motor 3 is configured as the main drive motor (large and small). When the screen 6 is closed (closed mode) and a tension force is applied to the screen 6, a driven motor is configured to generate a small torque.

The second motor 4, like the first motor 3, is configured to generate two types of torque, large and small, under the control of the control means. For example, the first motor 3 may generate large torque as the main drive side motor. At times, that is, in the screen opening mode, the driven side motor generates a small torque to apply tension to the screen 6, and the driven side motor also generates a small torque to apply tension to the screen 6.
In the screen closing mode in which the motor 3 generates a small torque, the main drive side motor generates a large torque to unfold the screen 6. Note that this second
Since the motor 4 rotates in the opposite direction to the first motor 3, it has the same configuration and is configured to be connected to the power source in a state opposite to that of the first motor 3.

The control means appropriately controls the torque of each motor 3, 4 according to each mode of opening and closing the screen 6. For example, in the screen opening mode, a large torque is applied to the first motor 3, and in the screen closing mode, a large torque is applied to the second motor 3. The motor 4 is configured to have a large torque. For this reason, the third
As shown in the figure, the control means 7 of this embodiment is provided in a part of the circuit that connects the first motor 3 and the second motor 4 to the power source (1), and controls the torque generated in the motor due to voltage drop. It is designed to keep the torque constant and generate a small amount of torque. That is, in order to connect the control means 7 to each motor 3, 4 as appropriate depending on each mode, the second motor 4 is connected to one of the motors via the switch S2.

The delay means, at the start of the opening or closing operation of the screen 6, causes the driven motor, which is opposite to the main motor that opens or closes the screen 6, to run a predetermined time later than the main motor that opens or closes the screen 6, for example. In addition to operating with a delay of about 0.15 sec, when the opening or closing operation of the screen is completed, the driven motor is stopped a predetermined time later than the main motor, for example, with a delay of about 0.5 sec. . Therefore, as shown in FIG. 3, the delay means 8 is activated by turning on an operation button 9 consisting of an "open" button, a "close" button, and a "stop" button. When , ``closed''.

When the button is turned on, the switch S,
Each switch s, s,', s2 . The opening and closing of s2' is delayed by a predetermined time.

Further, in the screen closing mode, when the screen 6 is closed to a predetermined position and the closing operation is to be stopped, the delay means 8 is configured to first stop the second motor 4 when the "stop" button is turned on. After opening switch S2/, after a predetermined delay, switch SI is opened.
As a result, the first motor 3 is also stopped after a predetermined time delay.

In this embodiment, as shown in FIG. 2, the screen 6 is wound upward to open the ceiling, but this is not particularly limiting.
As shown in the figure, the screen 6 may be rolled up downward to open the window or ceiling 5.

〔effect〕

As explained above, according to the electric screen device according to claim 1 of the present invention, instead of applying tension to the screen using the elastic force of the conventional spring,
By constantly rotating the motors in opposite directions even when the screen is opened or closed, and by setting the torque of one of the motors to a large value, in other words, by simply changing the torque of the motor, Since a certain tension is applied to the screen and the screen can be opened and closed, no matter what direction the screen is installed, it will not loosen under its own weight for a long period of time, and the amount of opening and closing of the screen can be increased freely. Can be set.

Further, according to the electric screen device of claim 2 of the present invention, a partial overtension state to the screen that occurs due to the torque difference of each motor at the start of the screen winding, and a partial overtension state that occurs when the screen winding is stopped. Relaxation conditions are effectively prevented by delay means or by adjusting the temporal timing for each motor, thereby providing high layer reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an electric screen device according to the present invention, FIG. 2 is a sectional view showing the installed state of the electric screen device according to the present invention when it is installed indoors, and FIG. 3 is a schematic plan view showing the electric screen device according to the present invention. A wiring diagram showing the connection state between the control means and the delay means and the motor, etc., FIG. 4 is a sectional view showing another installation state of the electric screen device according to the present invention, and FIG. 5 is a sunny room etc. where the electric screen is installed. A perspective view showing
FIG. 6 is a schematic configuration diagram showing a conventional electric screen device. 6... Screen, 1.2... Rotating roll, 3.4... Motor, 7... Control means, 8... Delay means.

Claims (1)

[Scope of Claims] 1. An electric screen device for winding up a screen installed in a horizontal direction substantially parallel to a ceiling surface or in a direction inclined to the ceiling surface, comprising: fixing each end side of the screen; , a pair of rotating rolls arranged parallel to each other and facing each other, a pair of motors provided on each of these rotating rolls and applying tension to the screen while rotating in opposite directions facing each other, and opening or closing the screen. and control means for controlling the driving force of these motors so that the motor on the driving side that applies tension to the screen generates a larger torque than the motor on the driven side that applies tension to the screen. screen device. 2. When starting the opening or closing operation of the screen, the driven motor of the pair of motors is operated a predetermined time later than the main motor, and when the opening or closing operation of the screen is completed, Claim 1, further comprising a delay means for stopping the driven side by a predetermined time later than the driving side.
Electric screen device related to.