JP3797255B2 - Roll screen rotation position detector structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotational position detection unit structure of a roll screen device.
[0002]
[Prior art]
As shown in FIG. 6, in a roll screen device 54 conventionally used as a heat shielding / light shielding (light control) means for a lighting window, the position of the screen 42 is controlled by rotating a disk slit 44 integrated with a rotary pulley 43, for example. In the case where the number is detected by the photo interrupter 45, when the photo interrupter 45 is generally used, in order to avoid saturation of the light receiving surface 46, disturbance light (in this case, mainly sunlight) is prevented from entering, And in order to ensure the reliability of a connection part, it is necessary to protect a connection part from the sunlight 55 or the wind and rain 56. FIG.
[0003]
Further, as shown in FIG. 7, in the above configuration, when the winding shaft of the pulley is greatly shaken at the time of winding, the position of the slit 44 is shifted, so that the signal from the photo interrupter 45 cannot be detected accurately. When the rotation shaft 48 is detached due to the position shift of 19 or sudden external force and the slit 44 is completely detached from the photo interrupter 45, the detection becomes impossible and there is a possibility of causing an abnormal stop of the screen.
[0004]
Therefore, in order to avoid the above-described misalignment and abnormal stop, for example, as shown in FIG. 8, when a round hole portion 58 is formed in a structure 49 that supports the pulley rotation shaft 48 and inserted therein, this time, There is a problem that it becomes difficult to attach and remove parts during maintenance.
[0005]
[Problems to be solved by the invention]
In the present invention, it is required to solve the problems and demands of such a conventional roll screen rotational position detection unit structure. Therefore, the problem to be solved by the present invention is that the photo interrupter can be fixed, the invasion of sunlight and wind and rain is prevented, the long-term reliability of the photo interrupter is ensured, and the rotating shaft is not rattled or detached during driving. And a position detection cover that can be fixed to the outer frame of the unit without interfering with the pulley rotating shaft support.
[0006]
[Means for Solving the Problems]
In order to solve this problem, the present invention is a roll screen device used as a light shielding / dimming means for a daylighting window, and detects the number of rotations of a pulley disk slit portion integrated with a rotating pulley by a photo interrupter, When performing position control, the position detection cover that protects the rotational position detection section by the photo interrupter and pulley disk slit section is composed of a position detection cover main body , a tilt stop section, and a connector protection cover section. the cover body, the pulley rotary shaft support member are separate members, and the pulley rotary shaft support member pulley rotational axis when mounting the position detecting cover in a state of placing the receiving U-shaped, Ya said pulley rotary shaft support member the interference between the rotating pulley and having an avoid Keru opening, an outer frame portion of the roll screen apparatus Yoo Position detecting cover fixing part for fixing the Tsu preparative outer frame portion and has a photointerrupter fixing portion for fixing the photointerrupter, the tilt preventing portion is a tilt stop for lifting and preventing detachment of the pulley rotary shaft with a pulley disc slit And the connector protecting cover portion has a cover for protecting the photo interrupter connecting portion.
[0007]
This makes it possible to fix the photo interrupter to the position detection cover.The position detection cover prevents the intrusion of sunlight and wind and rain, ensures the long-term reliability of the photo interrupter, and prevents the rotating shaft from rattling or coming off during driving. It can be prevented and can be fixed to the unit outer frame portion without interfering with the pulley rotation shaft support portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
[0009]
As shown in FIG. 1 to FIG. 3, in a roll screen device 1 used as a light shielding / dimming means for a daylighting window, the number of rotations of a pulley disk slit portion 4 integrated with a rotating pulley 3 is detected by a photo interrupter 5. When the position control of the screen 19 is performed, the position detection cover 6 that protects the rotational position detection unit 2 is composed of the position detection cover main body 7, the tilt stopper 8, and the connector protection cover unit 20, and the position detection cover The main body 7 is a separate member from the pulley rotation shaft support member 10, and the pulley rotation shaft support member 10 interferes with the pulley rotation shaft support member 10 and the rotation pulley 3 with the pulley rotation shaft 9 placed on the U-shaped receiver. The position detection cover fixing part 23 and the photo interrupter 5 that are fixed to the unit outer frame part 11 are fixed. A photo interrupter fixing portion 28, the tilt stop portion 8 has a tilt stop for preventing the pulley rotating shaft 9 with the pulley disk slit portion 4 from floating and coming off, and the connector protecting cover portion 20 is connected to the photo interrupter. A cover for protecting the portion 26 is provided.
[0010]
In the above, the pulley rotation shaft 9 is supported by a separate member, the photo interrupter 5 is fixed to the photo interrupter fixing portion 28 of the position detection cover 6, and the position detection cover main body 7 is attached to the unit outer frame portion 11. The position detection cover fixing hole 24 is used for fixing. A pulley rotation shaft support member 10 may be provided on the position detection cover 6, but in that case, an opening is required on the upper surface for assembly, so that sunlight or wind and rain enter from there and from the viewpoint of long-term reliability. It is not preferable. Therefore, the position detection cover 6 and the pulley rotation shaft support member 10 need to be provided separately.
[0011]
Although the position detection cover 6 has two openings, the first opening 21 avoids interference with the pulley rotation shaft support member 10 when the position detection cover 6 is attached. The second opening 22 avoids interference with the pulley rotation shaft 9 when the position detection cover 6 is attached.
[0012]
The position detection cover 6 has a three-sided box shape to prevent intrusion of sunlight and wind and rain, and the other one is shielded by abutting and fixing to the inner surface 13 of the unit outer frame.
[0013]
The position detection cover 6 has a tilt stop portion 8 for the pulley rotating shaft 9, and the photo interrupter connection portion 26 is also provided with a three-sided box-shaped connector protection cover portion 20 for protection. . The surface that hinders connector connection cannot be shielded, but the other is shielded to darken the photointerrupter connection portion 26, thereby improving the reliability of the connection portion.
[0014]
4 and 5 show a pulley structure in the roll screen device that operates stably and reliably over a long period of time. A pulley structure that has a guide groove with a half circumference around the wire winding start part of the left and right pulleys that wind up the screen winding wire, and a pulley structure that prevents the wires from being stacked by providing inclined ribs at the wire winding start part of the pulley. Have. As a result, the screen winding wire can be wound in order without being stacked on the pulley, so that the stress applied to the wire can be reduced and the difference in winding length between the left and right wires can be prevented. Therefore, the screen is not disturbed and the support base does not stick to the underwater take-up rod, and a stable opening / closing operation for a long time is possible.
[0015]
【The invention's effect】
As described above, according to the present invention, intrusion of sunlight and wind and rain is prevented, long-term reliability of the photo interrupter is ensured, and it is possible to prevent rattling and disengagement of the rotating shaft during driving. Since it is possible to avoid a detection omission (position shift) and a detection impossible (abnormal stop) state, a reliable and stable screen drive can be performed for a long time. In particular, the position detection cover main body and the pulley rotation shaft support member are separated, so that intrusion of sunlight and rain can be prevented. In this case, the position detection cover is attached without interfering with the pulley rotation shaft support portion. In addition, it is possible to avoid position detection deviation due to a photo interrupter.
[Brief description of the drawings]
FIGS. 1A and 1B show a position detection cover attached state of the present invention, in which FIG. 1A is a top view of a main part when the roll screen device is viewed from above, and FIG. 1B is a main part of line AA in FIG. FIG.
FIGS. 2A and 2B show a position detection cover according to the present invention, in which FIG. 2A is a front view showing a tilt stopper and an opening, FIG. 2B is a left side view showing a mounting portion, and FIG. (D) is a bottom view showing a tilt stop position.
FIG. 3 shows a state in which a photo interrupter is fixed to the position detection cover of the present invention, (a) is a front view showing a state in which an opening and a photo interrupter are fixed, and (b) shows a state in which the photo interrupter is fixed. (C) is a bottom view showing a state in which a photo interrupter is fixed.
4A and 4B show a rotary winding rod according to the present invention, in which FIG. 4A is a front view showing a pulley portion, FIG. 4B is a cross-sectional view taken along line AA in FIG. It is a side view which shows the B arrow state of (a).
5A and 5B show a rotary winding rod according to the present invention, in which FIG. 5A is a front view showing a pulley portion around which a wire is wound, and FIG. 5B is a partially enlarged view showing an enlargement of a portion C in FIG. is there.
6A and 6B show a conventional roll screen device, wherein FIG. 6A is a top view of the main part of the roll screen device as viewed from above, and FIG. 6B is a cross-sectional view of the main part taken along line AA in FIG. It is.
7A and 7B show a position detection unit of a conventional roll screen device, in which FIG. 7A is a side view showing the effect of sunlight and wind and rain, and FIG. 7B is a side view showing the effect of rotation axis misalignment. ) Is a side view showing the influence of external force.
FIG. 8 is a side view of a position detection unit illustrating an example of preventing a backlash and a detachment of a rotation shaft of a conventional roll screen device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roll screen apparatus 2 Rotation position detection part 3 Rotation pulley 4 Pulley disk slit part 5 Photo interrupter 6 Position detection cover 7 Position detection cover main body 8 Slip stop part 9 Pulley rotation shaft 10 Pulley rotation shaft support member 11 Unit outer frame section 12 Unit Outer frame bottom surface 13 Unit outer frame inner surface 14 Drive unit drive shaft 15 Wire 16 Water-side take-up rod 17 Take-up drive unit 18 Photo interrupter signal line 19 Screen 20 Connector protection cover portion 21 First opening portion 22 Second opening portion 23 Position detection cover mounting portion 24 Position detection cover fixing hole 25 Photointerrupter fixing female screw portion 26 Photointerrupter connection portion 27 Photointerrupter mounting screw 28 Photointerrupter fixing portion

Claims (1)

In a roll screen device used as a light shielding / dimming means for a daylighting window, the number of rotations of a pulley disk slit part integrated with a rotating pulley is detected by a photo interrupter, and the position of the screen is controlled. The position detection cover that protects the rotational position detection part by the disk slit part is composed of a position detection cover main body , a tilt stop part, and a connector protection cover part, and the position detection cover main body is a pulley rotation shaft support member. a separate member, and the pulley rotary shaft support member pulley rotational axis when mounting the position detecting cover in a state of placing the receiving U-shaped, the avoidance Keru opening interference with the pulley rotary shaft support member and a rotation pulley and having a position sensing cover fixed to the outside of the unit frame portion is an outer frame part of the roll screen device Has a fixed part and the photo-interrupter fixing portion for fixing the photointerrupter, the tilt preventing portion has a tilt stop for lifting and preventing detachment of the pulley rotary shaft with a pulley disc slit, the cover portion for the connector protection, A structure for detecting a rotational position of a roll screen, comprising a cover for protecting a photo interrupter connection.

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