JP2002191493A - Drive unit for electric curtain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-noise drive unit for an electric curtain, which prevents an excessive load on a driving motor even if a curtain rail is curved. SOLUTION: This drive unit for the electric curtain is provided with a driving sprocket 1 which is fitted into the rotating shaft of a motor, an endless-track chain 2 which meshes with the toothed gear of the driving sprocket 1, and a curtain rail 3 whereon the chain 2 travels. In the chain 2, a roller 5 is incorporated rotatably into a shaft 7 continuously connecting a continuous link plate 6 in a movable manner, the roller 5 is formed with a traveling wheel 5a in a peripheral direction, and the curtain rail 3 is provided with a guide rail for guiding the travel of the wheel 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric curtain driving device which can open and close a curtain electrically.

[0002]

2. Description of the Related Art In an electric curtain apparatus for opening and closing a curtain by electric power, a belt is generally used as a drive transmitting means for transmitting a rotational force of a driving motor to drive a runner.

[0003] When the curtain rail is straight, there is no problem with the conventional belt. However, when the curtain rail is curved, the belt contacts the inside wall of the curved curtain rail to reduce the frictional resistance. And overload the motor. Since the load due to frictional resistance is much larger than the load that normally drives the runner, the opening / closing of the curtain stops, the motor overloads, the motor burns, and the belt wears out and cuts off. Failure to do so may cause a failure. Therefore, a motor having a very large output is required.

As shown in FIG. 4, it is conceivable to employ a chain as a drive transmission means in a curved curtain rail.

In FIG. 4, reference numeral 41 denotes a driving sprocket mounted on a rotating shaft of a motor, reference numeral 42 denotes a chain for meshing with the driving sprocket 51 to move a runner, and reference numeral 43 denotes a curved curtain rail. Reference numeral 44 denotes a chain running housing provided along the other end for reversing the running direction of the chain.

[0006] Curved chain running housing 43
In order to smoothly move the chain 42, an idle wheel 45 is provided in accordance with the curved surface to prevent the chain 42 from sagging or hitting the curved inner wall of the chain running housing 43. It is necessary to change the running direction of 42. However, it is difficult to secure a space for providing such an idle wheel 45 in the electric curtain device.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive device for an electric curtain in which an excessive load is not applied to a drive motor even with a curved curtain rail. It is in.

[0008]

As a result of intensive studies conducted by the present inventors, a chain is adopted as a drive transmission means, and a rotatable roller is mounted on a shaft connecting a link plate of the chain, and the roller is mounted on the roller. It has been found that the above problem is solved by providing a traveling wheel, and the present invention has been completed.

That is, the present invention relates to an electric curtain driving device comprising a sprocket fitted to a rotating shaft of a motor, a chain meshing with a sprocket gear, and a curtain rail on which the chain runs. A roller is rotatably mounted on a shaft that movably connects a continuous link plate, the roller forms a traveling wheel in a circumferential direction, and a guide rail that guides the traveling of the wheel to the curtain rail. The present invention relates to a driving device for an electric curtain, wherein

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a main part of a driving device for an electric curtain according to the present invention, FIG. 2A is a perspective view of a chain used in the present invention, and FIG. FIG. 3 is a sectional view taken along line XX of FIG.

As shown in FIG. 1, the electric curtain driving device of the present invention includes a sprocket 1 fitted to a rotating shaft of a motor, an endless track chain 2 meshing with a sprocket 1 gear, and a chain running. The curtain rail 3 is provided.

The rotation of the motor is transmitted from the rotation shaft to the sprocket 1 as a rotational motion. This rotational motion is converted into linear motion by the engagement of the gear of the sprocket 1 and the chain 2, and the chain 2 is driven.

As shown in FIG. 2A, the chain 2
A continuous link plate 6 is movably joined with a shaft 7, and a roller 5 is rotatably incorporated in the shaft 7. The gears of the sprocket 1 mesh directly with the rollers 5, and the rotation of the motor is transmitted to the chain as linear motion. As shown in FIG. 2B, the chain used in the electric curtain driving device of the present invention is characterized in that a roller 5 is provided with a traveling wheel 5b in a circumferential direction.
As described later, the wheel 5a is mounted on a guide rail 3a provided on the curtain rail 3, and the chain 2 runs while being guided by the guide rail 3. Since the wheel 5a provided on the roller 5 rolls in the guide rail 3a, the roller 5 acts as a wheel, so that even if the curtain rail curves, no frictional resistance occurs, and an excessive load is applied to the motor. There is no such thing. Therefore, the curtain can be opened and closed with a small force. Further, when the roller 5 runs, the frictional resistance can be suppressed. The material of the roller 5 is not particularly limited, but is preferably made of a synthetic resin such as nylon or polyacetal in order to smoothly run the chain and reduce noise.

FIG. 3 is a sectional view taken along the line XX in FIG. 1 and shows the structure of a curtain rail for running the chain. The curtain rail 3 is provided with guide rails 3a and 3b for supporting a wheel 5a formed on the roller 5 and guiding the running of the chain. The curtain rail 3 having the guide rails 3a and 3b may be formed by integral molding, or may be formed by forming an outer frame of the curtain rail and fitting the guide rail into the outer frame. The wheel 5a formed on the roller 5 rolls in the guide rail 3a, so that the chain runs in the curtain rail.

In the case of a normal chain, a reversing sprocket is required at the end opposite to the driving sprocket to reverse the running direction of the chain. The other end does not need to be a sprocket because the attached roller is rotatably mounted. In the opening and closing device for an electric curtain, it is not necessary to transmit a rotating force to the end opposite to the driving sprocket 1, so it is only necessary to provide a reversing roller 4 for reversing the running direction of the chain. As shown in FIG. 1, the wheel 5a of the roller 5 comes into contact with the outer peripheral surface of the reversing roller 4, the roller 5 of the chain rotates, and the chain 2 runs. Therefore, the traveling shaft may be a columnar member having a semicircular cross section.

The method of attaching the runner to the electric curtain driving device of the present invention is not particularly limited.
A runner mounting jig may be mounted on the link plate of the chain.

[0018]

According to the first aspect of the present invention, the frictional resistance generated between the power transmission means and the rail is reduced by using a chain having rollers formed with wheels for traveling as the power transmission means, The curtain can be opened and closed with a smaller force, and the output of the driving motor can be reduced.

In addition, by using a chain having rollers formed with wheels for running, it is possible to easily detect a change in current applied to the motor when the curtain is fully opened or fully closed, so that a limit switch, an approach switch, a cam, and the like can be used. The stop control can be easily performed by an electronic circuit without using such a method. Therefore, the structure of the electric curtain driving device can be simplified, the mounting of the device can be simplified, and the manufacturing cost can be reduced.

According to the second aspect of the present invention, in addition to the above-described effects, the electric curtain only needs to be provided at the end opposite to the driving sprocket for reversing the running direction of the chain. The structure of the driving device can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view of an electric curtain driving device according to the present invention.

FIG. 2A is a partial perspective view of a chain of the electric curtain driving device according to the present invention, and FIG. 2B is a cross-sectional view of a roller incorporated in a shaft for joining plate links.

FIG. 3 is a sectional view of the curtain rail of FIG.

FIG. 4 is a plan view of a driving device for an electric curtain when a conventional chain is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sprocket 2 Chain 3 Curtain rail 3a, 3b Guide rail 4 Roller 5 Roller 5a Wheel 6 Link plate 7 axis

Claims (2)

[Claims] 1. An electric curtain driving device comprising: a driving sprocket fitted to a rotating shaft of a motor; an endless track chain meshing with a gear of the driving sprocket; and a curtain rail on which the chain runs. In the chain, a roller is rotatably incorporated on a shaft that movably connects a continuous link plate, and the roller has a traveling wheel formed in a circumferential direction, and the traveling of the wheel is performed on the curtain rail. A driving device for an electric curtain, comprising a guide rail for guiding. 2. A reversing roll for reversing the running direction of the chain is provided at an end opposite to an end where the chain of the endless track meshes with a driving sprocket. The driving device for an electric curtain according to Claim 1.