JP3083008U - Photocoupler for rotation - Google Patents

Abstract

(57) [Problem] To provide a rotating photocoupler capable of transmitting and receiving a plurality of lines and bidirectionally with light between a rotating side and a fixed side by a light emitting unit and a light receiving unit in an annular dark room. . A rotating photocoupler includes a rotor frame (11) mounted on a rotor shaft (2) and a stator frame (12) mounted on the rotor frame (11) to share the axis of the rotor shaft (2) and to rotate or stop relatively. , Between the rotor frame 11 and the stator frame 12, an annular dark room 1 centered on the axis is provided.
4 are formed, and the rotor frame 11 in the dark room 14 is formed.
Alternatively, a light emitting portion that blinks in response to a signal is attached to the stator frame 12 portion, and a light receiving portion that receives blinking of the light emitting portion is attached to the stator frame 12 or the rotor frame 11 portion.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a rotating photocoupler capable of transmitting and receiving signals by two-way light between a rotating side and a fixed side through a plurality of lines.

[0002]

[Prior art]

 Conventionally, a method using a brush and a slip ring or a rotary transformer has been used to send and receive signals between the rotating side and the fixed side.However, the slip ring is used because of mechanical contact. There was a problem of wear or noise generation, maintenance was complicated, and the rotary transformer had a limit to high-speed signal transmission. On the other hand, as shown in FIG. 9, a dark room 34 is formed by a stator 32 and a rotor 33 arranged on one rotating shaft 31, and a light emitting element provided on the stator 32 on the rotating shaft 31 in the dark room 34. 35 and a light receiving element 36 provided on a rotor 32 are arranged so as to face each other, or a stator 42 and a rotor 43 arranged on one rotating shaft 41 as shown in FIG. A dark chamber 44 is formed, and one end faces of an optical fiber 45 provided on a stator 42 and an optical fiber 47 provided on a rotor 43 are opposed to each other on the rotating shaft 31 in the dark chamber 44, and light is emitted on the other end face. By the rotating photocoupler 40 in which the element 46 and the light receiving element 48 are arranged, signals can be transmitted and received at high speed without contact.

[0003]

[Problems to be solved by the invention]

 However, in the conventional rotating photocouplers 30 and 40 having the above structure, signals are transmitted and received on one rotating shaft 31 and 41, so that only one direction and one line can be realized. It was mechanically impossible to send and receive signals. Further, when the central portion such as the hollow shaft could not be used, it was not possible to transmit and receive signals by continuous light.

The present invention has been made in view of the above circumstances, and has as its object to provide a rotating photocoupler that enables transmission and reception of light between a rotating side and a fixed side in a plurality of lines and bidirectionally. .

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, according to the invention as set forth in claim 1, a rotor frame attached to a rotor shaft, and the rotor frame shares the axis of the rotor shaft and can be rotated or stopped relatively. A rotating photocoupler having a stator frame attached to the rotor frame, an annular dark room centered on the axis is formed between the rotor frame and the stator frame, and the rotor frame or the A light emitting portion that blinks in response to a signal is attached to the stator frame portion, and a light receiving portion that receives blinking of the light emitting portion is attached to the stator frame or the rotor frame portion. The transmission and reception of light between the rotating side and the fixed side can be performed in multiple lines and bidirectionally by the light emitting unit and the light receiving unit in the annular dark room.

According to a second aspect of the present invention, a plurality of the rotating photocouplers according to the first aspect are mounted on the rotor shaft. Transmission and reception of light between the rotating side and the fixed side can be performed in multiple lines and bidirectionally.

In the invention according to claim 3, the light emitting unit attached to the dark room is one light emitting element, and the light receiving unit is a circular dark room at an equal angle about an axis. It is characterized in that it is a large number of light receiving elements arranged in the device. By providing a large number of light receiving elements, blinking of the light emitting elements can be detected.

In the invention according to claim 4, the light emitting unit attached to the dark room has one light emitting element and the one light emitting element is located at a position facing one of the light receiving elements. At this time, an auxiliary light emitting element positioned between other adjacent light receiving elements is attached. The signal can be averaged and transmitted by the auxiliary light emitting element.

[0009] The invention according to claim 5 is characterized in that the plurality of light receiving elements or one light emitting element and the auxiliary light emitting element are connected and driven in parallel. By driving the light receiving element or the light emitting element and the auxiliary light emitting element connected in parallel, the fluctuation of the signal can be smoothed.

[0010]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 to 6 are views for explaining the rotating photocoupler according to the embodiment of the present invention. FIG. 1 is a sectional view of the rotating photocoupler, FIG. 2 is a sectional view of the first rotating photocoupler, and FIG. 4 is a side view of the first rotating photocoupler, FIG. 4 is a sectional view of the second rotating photocoupler, FIG. 5 is a side view of the second rotating photocoupler, and FIG. 6 is a circuit configuration of the rotating photocoupler. FIG.

In these figures, a rotating photocoupler 1 of the present embodiment includes a first rotating photocoupler 10 and a second rotating photocoupler 10 capable of transmitting and receiving signals by one line of light to a rotor shaft 2 in one direction. Rotating photocouplers 20 are arranged in parallel, sharing a shaft center 2 a, and mounted via a cover 4 of a bearing 3 provided on the rotor shaft 2. It is capable of transmitting and receiving signals using two lines of light in two directions.

The first rotating photocoupler 10 includes a rotor frame 11, a stator frame 12, a mounting frame 13 forming a part of the stator frame 12, a light emitting element 15, a light receiving element 16, and the like. It is configured. The rotor frame 11 is formed in a substantially ring shape with a predetermined thickness having a shaft hole 11a to be attached to the rotor shaft 2, and partitions 11b and 11c are formed in left and right peripheral portions, and its cross-sectional shape is generally co-shaped. It is formed in a letter-shaped groove shape. In the vicinity of the shaft hole 11a, a wiring hole 11d for passing a wiring 15a of the light emitting element 15 described later along the circumference of the rotor shaft 2 is formed. The stator frame 12 is formed in a substantially ring shape with the same thickness attached to the outer periphery of the rotor frame 11, and a flange portion 12 a attached to the cover 4 is formed on an outer peripheral edge portion on one side. A partition portion 12b is formed in the inner peripheral portion of the other side surface so as to be close to and facing the partition portion 11c of the rotor frame 11, and a wiring 16a of the light receiving element 16 to be described later is passed through a central peripheral portion. Wiring hole 12c is formed. The mounting frame 13 is formed in a substantially ring shape, is integrally mounted on the inner surface side of the stator frame 12, and has an inner peripheral portion on one side surface which is in close proximity to the partition portion 11 b of the rotor frame 11. A portion 13a is formed. That is, between the rotor frame 11 and the stator frame 12 and the mounting frame 13, an annular dark room 14 centered on the axis 2a whose right and left sides are partitioned by the partition portions 11b and 13a and the partition portions 11c and 12b, respectively. Is formed. One light emitting element 15 is attached to the rotor frame 11 with its light emitting part facing the dark room 14. The wiring 15a of the light emitting element 15 is drawn out along the periphery of the rotor shaft 2 through the wiring hole 11d. A plurality of (for example, twelve) light receiving elements 16 are provided on the mounting frame 13 forming a part of the stator frame 12 at a uniform angle about the axis 2a. It is installed facing. The light emitting element 15 is, for example, a predetermined light emitting diode (LED) that blinks by a signal, and the light receiving element 16 is a predetermined phototransistor that detects the blinking of the light emitting element 15.

The second rotating photocoupler 20 includes a rotor frame 21, a stator frame 22, a mounting frame 23 forming a part of the stator frame 22, a light emitting element 26, a light receiving element 25, and the like. It is configured. The rotor frame 21, the stator frame 22, and the mounting frame 23 each have a portion corresponding to the first rotating photocoupler 10 formed in the same shape, and the rotor frame 21 has the same shaft hole 21 a and partition portion. 21b, 21c and a wiring hole 21d are formed, the stator frame 22 is formed with a similar flange portion 22a, a partition portion 22b, and a wiring hole 22c, and the mounting frame 23 is formed with a similar partition portion 23a. An annular dark room 24 centering on the axis 2a is formed between the rotor frame 21, the stator frame 22, and the mounting frame 23. A plurality of (for example, 12) light receiving elements 25 are attached to the rotor frame 21 at an equal angle about the axis 2a with their light receiving portions facing the inside of the dark room 24. In addition, one light emitting element 26 is mounted on the mounting frame 23 constituting a part of the stator frame 22 with its light emitting part facing the dark room 24.

As shown in FIG. 1, the first and second rotating photocouplers 10 and 20 are respectively mounted on a rotor shaft 2 to which a cover 4 having a bearing 3 and a flange 4 a thereof is attached. The shaft holes 11a and 21a of the stator frames 11 and 21 are inserted and attached adjacently, and the flange portions 12a and 22a of the stator frames 12 and 22 are attached to the flange portions 4a of the cover 4 by inserting bolts or the like. Then, the wirings 15a and 25a of the light emitting element 15 and the light receiving element 25 are drawn out along the circumference of the rotor shaft 2 through the wiring holes 11d and 21d, and the wirings 16a and 26a of the light receiving element 16 and the light emitting element 26 are respectively connected. It is pulled out to the surroundings through the wiring holes 12c and 22c. As shown in FIG. 6, the first rotating photocoupler 10 has a light emitting element 15 connected to a rotating side signal conversion circuit 5 for converting a signal between the rotating side sequencer and a plurality of light receiving elements. The elements 16 are connected in parallel to each other and connected to a fixed-side signal conversion circuit 6 that converts signals between the fixed-side sequencer. The light-emitting element 26 of the second rotating photocoupler 20 is connected to the fixed-side signal conversion circuit 6, and the plurality of light-receiving elements 25 are connected to the rotation-side signal conversion circuit 5 in parallel with each other. . The rotation-side signal conversion circuit 5 converts a signal transmitted from the rotation-side sequencer into a drive signal for blinking the light-emitting element 15 and converts a signal received by the light-receiving element 25 into a signal to be transmitted to the rotation-side sequencer. The fixed-side signal conversion circuit 6 converts a signal received by the light-receiving element 16 into a signal to be transmitted to the fixed-side sequencer, and converts a signal transmitted from the fixed-side sequencer into a light-emitting element 26. Is a part for converting into a drive signal for blinking.

In the rotating photocoupler 1 having the above configuration, in the first rotating photocoupler 10, a signal transmitted from the rotating sequencer side is converted into a driving signal by a rotating side signal conversion circuit 5, and the signal is transmitted to the rotor. The light emitting element 15 provided on the frame 11 blinks in the dark room 14, and the blinking of the light emitting element 15 is caused by one of the plurality of light receiving elements 16 provided on the mounting frame 13 which constitutes a part of the stator frame. The light is received, and the signal is transmitted to the fixed sequencer through the fixed signal conversion circuit 6. In the second rotating photocoupler 20, the signal transmitted from the fixed-side sequencer is converted into a drive signal by the fixed-side signal conversion circuit 6, and is converted to a mounting frame 23 which forms a part of the stator frame. The provided light emitting element 26 flickers in the dark room 24, and the flickering of the light emitting element 26 is received by one of the plurality of light receiving elements 25 provided in the rotor frame 21, and the signal is transmitted to the rotation side signal conversion circuit. 5 is transmitted to the fixed sequencer side. In the dark chambers 14 and 24, the light-emitting elements 15 and 26 blink depending on the rotational position of the light-receiving elements 16 and 25. , 25 can be connected in parallel to smooth the circuit. That is, the first rotating photocoupler 10 transmits a signal from the rotating side to the fixed side by light, and the second rotating photocoupler 20 transmits a signal from the fixed side to the rotating side by light. Therefore, the rotating photocoupler 1 is capable of transmitting and receiving signals in two directions by two lines of light.

FIGS. 7 and 8 are views for explaining a rotating photocoupler according to another embodiment of the present invention. FIG. 7 is a side view of a first rotating photocoupler, and FIG. 8 is a second rotating photocoupler. FIG. 2 is a side view of a photocoupler for use. The parts and members corresponding to the rotating photocoupler of the above embodiment are denoted by the same reference numerals, and the detailed description is omitted.

In this embodiment, a first rotating photocoupler 10 ′ has a rotor frame 11, a stator frame 12, and a mounting frame 13 formed in the same manner as the first rotating photocoupler 10 of the above embodiment. A light-emitting element 15 and a plurality of light-receiving elements 16 are provided facing the interior of the dark room 14, and the rotor frame 11 further includes a light-emitting element 15 at a position facing one of the light-receiving elements 16. The auxiliary light emitting element 15 'is provided in a portion located at the center of another adjacent light receiving element 16. In the second rotating photocoupler 20 ′, the rotor frame 21, the stator frame 22, and the mounting frame 23 are formed in the same manner as the second rotating photocoupler 20 of the above-described embodiment, and face the dark room 24. The light-emitting element 26 and the plurality of light-receiving elements 25 are provided. The mounting frame 23 further includes, when the light-emitting element 26 is located at a position facing one of the light-receiving elements 25, another adjacent light-receiving element 25. An auxiliary light emitting element 26 'is provided in a portion located at the central portion of the reference numeral 25. The first and second rotating photocouplers 10 'and 20' are connected in parallel so that the light emitting element 15 and the auxiliary light emitting element 15 'and the light emitting element 26 and the auxiliary light emitting element 26' are simultaneously driven. Like the rotating photocoupler 1 of the embodiment, it is attached to the rotor shaft 2 in parallel.

In the first and second rotating photocouplers 10 ′ and 20 ′ of the above-described embodiment, in addition to the light emitting elements 15 and 26, the auxiliary light emitting elements 15 ′ and 26 ′ are connected to the other adjacent receiving couplers. Since it is provided at a portion located at the central portion of the optical element 16 or 25 and is connected in parallel so as to be driven simultaneously, it is possible to smooth the fluctuations occurring in the light receiving signal in a circuit.

In the above embodiment, an example in which a plurality of light receiving elements 16 and 25 are provided and connected in parallel has been described. However, at least light receiving elements capable of detecting light from the light emitting elements 15 and 26 or the auxiliary light emitting elements 15 ′ and 26 ′ are described. As long as the elements 16 and 25 are provided, a large number of light emitting elements may be provided and one or two light receiving elements may be provided. Further, the size and shape of the rotor frames 11 and 21, the stator frames 12 and 22, and the mounting frames 13 and 23 can be arbitrarily set, and the first and second rotating photocouplers 10 and 20 are attached to the rotor shaft 2. Providing a plurality of sets enables bidirectional transmission and reception of multiple lines.

[0020]

[Effects of the Invention] As described above, the rotating photocoupler of the present invention is capable of rotating or stopping relative to the rotor frame mounted on the rotor shaft and sharing the axis of the rotor shaft with the rotor frame. In a rotating photocoupler having a stator frame mounted on a rotor frame, an annular dark room centered on an axis is formed between the rotor frame and the stator frame, and the rotor frame or the stator frame portion in the dark room is formed. A light-emitting part that flashes in response to a signal is attached to the light source, and a light-receiving part that receives the light-emission of the light-emitting part is mounted on the stator frame or rotor frame. Transmission and reception of light between the rotating side and the fixed side can be performed in multiple lines and bidirectionally.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotating photocoupler according to an embodiment of the present invention.

FIG. 2 is a sectional view of the first rotating photocoupler according to the embodiment of the present invention;

FIG. 3 is a side view of the first rotating photocoupler according to the embodiment of the present invention;

FIG. 4 is a sectional view of a second rotating photocoupler according to the embodiment of the present invention;

FIG. 5 is a side view of the second rotating photocoupler according to the embodiment of the present invention;

FIG. 6 is a diagram illustrating a circuit configuration of the rotating photocoupler according to the embodiment of the present invention.

FIG. 7 is a side view of a first rotating photocoupler according to another embodiment of the present invention.

FIG. 8 is a side view of a second rotating photocoupler according to another embodiment of the present invention.

FIG. 9 is a diagram illustrating a conventional rotating photocoupler.

FIG. 10 is a diagram illustrating another conventional rotating photocoupler.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rotation photocoupler 2 Rotor shaft 2a Shaft center 3 Bearing 4 Cover 5 Rotation side signal conversion circuit 6 Fixed side signal conversion circuit 4a, 12a, 22a Flange part 10, 10 ', 20, 20' Rotation photocoupler 11, 21 Rotor frame 11a, 21a Shaft hole 11b, 11c, 12b, 13a, 21b, 21c, 2
3a Partitioning portions 11d, 12c, 21d, 22c Wiring holes 12, 22 Stator frame 13, 23 Mounting frame 14, 24 Dark chamber 15, 15 ', 26, 26' Light emitting element 15a, 16a, 25a, 26a Wiring 16, 25 Light receiving element

Claims (5)

[Utility model registration claims] 1. A rotating photocoupler comprising: a rotor frame attached to a rotor shaft; and a stator frame attached to the rotor frame so as to rotate or stop relatively while sharing the axis of the rotor shaft. Between the rotor frame and the stator frame,
An annular dark room centered on the axis is formed, and a light-emitting portion that flashes in response to a signal is attached to the rotor frame or the stator frame portion in the dark room, and the light-emitting portion is mounted on the stator frame or the rotor frame portion. A photocoupler for rotation, comprising a light receiving unit for receiving the blinking of the unit. 2. The rotating photocoupler according to claim 1,
A rotating photocoupler, wherein a plurality of sets are mounted on the rotor shaft. 3. The light-emitting unit mounted in the dark room is one light-emitting element, and the light-receiving unit is a plurality of light-receiving elements arranged in an annular dark room at an equal angle about an axis. The rotating photocoupler according to claim 1, wherein: 4. The light-emitting section mounted in the dark room includes one light-emitting element and, when the one light-emitting element is located at a position facing one of the light-receiving elements, between the other adjacent light-receiving elements. 4. The rotating photocoupler according to claim 3, wherein an auxiliary light-emitting element is mounted. 5. The rotating photocoupler according to claim 3, wherein the plurality of light receiving elements or one light emitting element and the auxiliary light emitting element are connected and driven in parallel.