JPH0782975A - Rotation angle detector of roll pipe of roll screen - Google Patents

Abstract

PURPOSE:To make it possible to easily incorporate a roll pipe rotational angle detector to a roll pipe without changing the construction of an electric roll screen. CONSTITUTION:A circular light passive reflector 30 or a ferromagnetic plate is mounted to a roll pipe 10 or a sleeve 11 rotating therewith or a driving wheel 22 of a motor coaxially with the roll pipe. An optical sensor 31 or a magnetic sensor is mounted to a motor case 23 or a fixed end cap 16 fixing the motor case or a bracket 18 fixing and bearing it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a device for detecting a rotation angle of a roll which winds a screen of a roll screen.

[0002]

2. Description of the Related Art A device for detecting the rotation angle of a roll pipe of a roll screen is known from Japanese Utility Model Laid-Open No. 62-182394. The known device comprises a rotary encoder arranged on a fixed member in the roll pipe, and a gear type rotation transmission means for transmitting the rotation of the roll pipe to a rotary shaft of the rotary encoder.

[0003]

In the conventional apparatus, since the rotary encoder and the gear type rotation transmitting means for transmitting the rotation of the roll pipe to the rotary shaft thereof are incorporated inside the roll pipe, the structure of the roll screen becomes complicated. However, there is a problem that it takes extra time and effort to assemble the roll screen.

The present invention is intended to solve this problem, and an object of the present invention is to provide a roll pipe which does not complicate the structure of the roll screen and does not require special labor for assembling the roll screen. It is to provide a rotation angle detection device.

[0005]

In order to achieve the above-mentioned object, the means adopted by the present invention is such that an optical sensor or a magnetic sensor is arranged on a fixing member located inside or on the end face of a roll pipe of a roll screen, The light reflecting plate or the ferromagnetic plate is provided at a position on the roll pipe that is close to the sensor or on a sleeve that rotates integrally with the roll pipe.

[0006]

The optical sensor or the magnetic sensor is a fixing member located inside or on the end surface of the roll pipe, such as a motor case,
It can be easily attached to an end cap or the like, and its sensor cord can be wired to the control unit together with the power cord of the motor. Both the light reflection plate and the ferromagnetic plate can be easily attached to the inner peripheral surface or the end surface of the roll pipe, or the inner peripheral surface or the end surface of the sleeve that rotates integrally with the roll pipe via an adhesive or the like.

As described above, the device of the present invention can be easily incorporated in the roll screen without changing the structure of the roll screen.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiments shown in the drawings. As shown in FIG. 1, the sleeve 11 is fitted into the end surface of the roll pipe 10 on the side where the motor 20 is inserted so as to rotate integrally, and the cylindrical light reflection plate 30 is attached to the inner peripheral surface of the sleeve by an adhesive material. Impregnate. The inner peripheral surface of the light reflection plate 30 has a pattern in which reflective portions and non-reflective portions are alternately arranged in the circumferential direction while changing the intervals in sequence. An optical sensor 31 including a light emitting / receiving element is attached to the outer peripheral surface of the motor case 23 coaxial with the light reflecting plate 30. A rotary end cap (13) is fitted on the end surface of the roll pipe (10) opposite to the motor (20), and a shaft end portion (14) integral with the end cap is rotatably supported by a bracket (12).

Rotating the motor 20 or a roll pipe
Directly guide the screen 15 wound on the roll pipe 10
When 10 is rotated, the light reflection plate 30 rotates around the outer circumference of the light sensor 31, and the light sensor 31 sends a pulse signal according to the pattern of the light reflection plate 30 to the microcomputer of the control unit. From this pulse signal, the microcomputer calculates the rotation direction and rotation angle of the roll pipe, and carries out predetermined control based on the calculation result.

As shown in FIG. 2, a light reflection plate 30 of an annular disc is attached to the outer end surface of the sleeve 11 fitted to the end surface of the roll pipe 10 so as to rotate integrally with the same, and the optical sensor 31 is a motor. The motor case 23 of 20 may be attached to the inner end surface of the fixed end cap 16 to which the motor case 23 is fixed. Further, as shown in FIGS. 3 and 4, a cylindrical light reflection plate 30 is attached to the outer peripheral surface of the sleeve 11 fitted to the end surface of the roll pipe 10 and exposed from the roll pipe 10, and an optical sensor 31 is attached to the motor case 23. It may be attached to the end cap 16 to which is fixed or the bracket 12 that fixedly supports the end cap 16.

Further, as shown in FIG. 5, when the drive wheel 22 is attached to the output shaft 21 of the motor 20 via the safety clutch 24 and the roll pipe 10 is rotated by the drive wheel, the end face of the drive wheel 22 on the motor side is driven. A light reflecting plate 30 which is an annular disc is attached to the optical disk, and an optical sensor 31 is attached to the inner end surface of the motor case 23. A drive wheel 22 is fixed to the output shaft 21 of the motor 20, the drive wheel is engaged with a driven part in the roll pipe 10 to rotate the roll pipe 10, and the screen 15 is wound up on the roll pipe 10 or rolled.
Rewind from 10. A case 23 of the motor 20 is fixed to a fixed end cap 16, and a shaft end 17 of the fixed end cap is fixedly supported by a bracket 18. Optical sensor
The sensor cord 32 of 31 is pulled out together with the motor cord 19 of the motor 20 and wired to a control unit (not shown).

In each of the embodiments, the rotation of the light reflecting plate that rotates integrally with the roll pipe is detected by an optical sensor. Instead of the light reflecting plate, a ferromagnetic material and a non-magnetic material are arranged in the circumferential direction. Magnetic plates with alternating patterns with varying intervals are attached to the roll pipe or the sleeve that rotates integrally with it, or the drive wheel of the motor, and the magnetic sensor is used instead of the optical sensor to detect the rotation of the magnetic plate. May be.

[0013]

As described above, the apparatus of the present invention is different from the conventional one in which the encoder is provided in the roll pipe and the rotation of the roll pipe is transmitted to the encoder through the gear type rotation transmission means. , A roll pipe, a sleeve that rotates integrally with the roll pipe, or a drive wheel of a motor with a light reflection plate or a magnetic plate attached, and the rotation of the light reflection plate or the magnetic plate attached to a fixed end cap or bracket that fixes the motor case or the motor case. Since it is a method of detecting with a light sensor or a magnetic sensor, there is an excellent effect that the roll screen can be easily assembled without particularly changing the structure of the roll screen.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a roll screen having an embodiment of the present invention,

FIG. 2 is a view corresponding to FIG. 1 of the second embodiment,

FIG. 3 is a diagram corresponding to FIG. 1 of the third embodiment,

FIG. 4 is a view corresponding to FIG. 1 of a fourth embodiment,

FIG. 5 is a view corresponding to FIG. 1 of the fifth embodiment,

[Explanation of symbols]

10: Roll pipe, 11: Sleeve, 12: Bracket, 1
3: Rotating end cap, 14: Shaft end, 18: Bracket, 19: Motor code, 20: Motor, 21: Output shaft, 22:
Drive wheel, 23: motor case, 24: safety clutch,
30: Light reflection plate, 31: Optical sensor, 32: Sensor code

Claims (1)

[Claims] 1. A roll pipe (1) for an electric roll screen.
0) or a member (11, 13) that rotates integrally with the fixing member (16, 18) which is provided with an annular light reflection plate or an annular ferromagnetic plate coaxially with the roll pipe and which is located inside or on the end face of the roll pipe. , 23) is provided with an optical sensor (31) or a magnetic sensor for detecting the rotation of the light reflection plate (30) or the magnetic plate, and a roll pipe rotation angle detection device for a roll screen.