JPH09119277A - Transmission structure of winding pipe for screen in motorized roll blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent trouble resulting from the warpage of the support shaft of a winding pipe for a screen. SOLUTION: Bearing brackets 6, 6' for the support shafts 7, 7' of a shaft 4 for supporting a screen are received by aligning bearings 9. The aligning bearing 9 is united with the driving shaft of a motor 8 through a flexible coupling 10. Accordingly, the warpage of the support shafts 7, 7' is absorbed by the aligning bearings 9 first, and the angle variation of the front end of the support shaft is absorbed by the flexible coupling 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission structure for a screen winding pipe in an electric roller blind.

[0002]

2. Description of the Related Art In recent years, a large number of large-scale multipurpose buildings having large-scale atriums and daylighting surfaces have been planned and constructed. In these buildings, it is required not only to adjust the amount of lighting, but also to darken it by completely blocking light to enhance the performance. As such a blind capable of quick dimming and light shielding even on a non-vertical lighting surface, a pair of rollers arranged in parallel with each other and a screen stretched between these rollers are used. There is an electric roll blind that has a motor attached to each of them, and is configured to wind the screen on one of the rollers while moving the screen horizontally by the driving force of these motors. It becomes large over a long span and width.

That is, in the electric roller blind 1 shown in FIG. 5, 2 is a screen, 3 and 3'are wires, 4 is a screen take-up pipe, and 5 is a wire take-up pipe. The applicant of the present invention proposes, in Japanese Patent Application No. 6-92376, an electric roll blind in which a trapezoidal or isosceles triangular non-constant width screen 2'is wound as shown in FIG. .

The screen winding pipe 4, which is wide and supported only at both ends, must be stiffened under the condition that a constant tension capable of canceling the relaxation must be continuously introduced to the screens 2 and 2 '. Instead, the diameter increases and the weight also increases.
The screen take-up pipe 4 cannot be supported by a backup roll or the like. Normally, as shown in FIG. 7, when the support shafts 7 and 7'are provided to the bearing brackets 6 and 6'and directly connected to the drive shaft of the motor 8. To be done.

[0005]

In the embodiment shown in FIG. 7, since the screen 2 is not yet wound, the pipe 4 is straight, but the screen 2 is wound and the screen 2 is wound.
In the state of bearing the load of, it bends as shown in FIG.
It is inevitable that the support shafts 7 and 7'will warp. As a result, the bearing portions of the support shafts 7 and 7'and the direct connection between the tip of the support shaft 7'and the drive shaft of the motor 8 are overloaded, and the transmission portion is broken.
Cause damage.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to quickly absorb the warp of the unavoidable support shafts 7 and 7 '. It is intended to provide a transmission structure of a winding pipe for a screen in an electric roller blind which guarantees transmission.

[0007]

In order to achieve the above object, the power transmission structure of the present invention uses a centering bearing as a bearing bracket for the support shaft of the screen support shaft and a flexible coupling. In order to connect to the drive shaft of the motor, the warp of the support shaft is first absorbed by the alignment bearing, and the bending angle at the tip of the support shaft is absorbed by the flexible coupling.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a support shaft 7'taken out from a pipe 4 is a centering bearing mounted on a bearing bracket 6 '. In addition to being received by 9, the tip end thereof is not directly connected to the drive shaft of the motor 8 but is connected via the flexible coupling 10.

Reference numeral 11 in the figure denotes a drive shaft 11a of the motor 8.
It is a new bearing bracket for bearings. In FIGS. 3 and 4 showing the entire pipe 4 according to the present invention, the other support shaft 7 side of the pipe 4 is also shown, but its bearing is also a centering bearing 9 capable of absorbing warpage. I am trying.

[0010]

Since the present invention is configured as described above, it has the following effects. This is extremely significant because it is possible to eliminate the inconvenience in the transmission structure between the bearing portion and the motor drive shaft due to the unavoidable warpage of the support shaft of the screen take-up pipe.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a transmission structure according to the present invention.

FIG. 2 is a plan view of the main part of the transmission structure of the present invention.

FIG. 3 is an overall view of the transmission structure of the present invention when the screen is not wound.

FIG. 4 is an overall view of the transmission structure of the present invention when the screen is wound.

FIG. 5 is an explanatory diagram of an electric roll blind.

FIG. 6 is an explanatory diagram of a roll blind of a special screen.

FIG. 7 is an explanatory diagram of a power transmission structure of a screen winding pipe in a conventional electric roller blind when the screen is not wound.

FIG. 8 is an explanatory view of a transmission structure of a screen winding pipe when a screen is wound in a conventional electric roller blind.

[Explanation of symbols]

 1 Electric Roll Blind 2 Screen 2'Non-Constant Width Screen 3 Wire 3'Wire 4 Screen Winding Pipe 5 Wire Winding Pipe 6 Bearing Bracket 6'Bearing Bracket 7 Support Shaft 7'Support Shaft 8 Motor 9 Aligning Bearing 10 Flexible coupling 11 Bearing bracket 11a Drive shaft

Claims (1)

[Claims] 1. A screen for an electric roll blind, characterized in that a bearing bracket bearing of a supporting shaft of a screen supporting shaft is formed as a centering bearing and is connected to a drive shaft of a motor through a flexible coupling. Transmission structure of the winding pipe.