JPS6045208A - Optical rotary connector device - Google Patents

Abstract

PURPOSE:To send an optical signal to a motor device, etc. even when feeding out a cable, by constituting so that the optical signal can be fetched simultaneously and continuously from a core wire of a multicore optical fiber cable of a rotating body. CONSTITUTION:When a multicore optical fiber cable 5 is taken out and in by a rotation of a drum 1 and each fiber core wire 5a-5c rotates together with the drum 1, a rotary plate 12 also rotates in the same way, therefore, no stress is applied to the core wires 5a-5c. When the drum 1 is rotating, an output light of the wire 5a is reflected directly by a prism 18 and inputted to a connector 23, and fetched to the outside of the drum by a fiber core wire 6a of an optical signal fetching optical fiber cable 6 connected to the connector 23. An optical signal from the core wire 5b is transmitted to a core wire 6b from a transparent glass plate 16, a concave mirror 19, a photodetecting use focusing rod lens 21a, an optical fiber 21c, a rod lens 21b and the connector 23. In the same way, a light from the core wire 5c is transmitted to a core wire 6c and fetched to the outside of the drum 1.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to an optical rotary system that extracts optical signals from a multi-core optical fiber cable that is let out or taken out from a rotating body.
The present invention relates to a connector device.

(Technical Background of the Invention) In recent years, optical fiber cables have been used for image monitoring of equipment including rotating bodies, such as elevators, tunnel excavators, and submarine exploration vehicles.

That is, while repeating the operation of drawing out or pulling out the optical fiber cable from a rotating body such as a drum, the inside of the elevator is monitored using a monitor camera connected to the cable, or the inside of a tunnel or the bottom of the 11+J is searched.

(Problems in the Background Art) However, conventionally, there is only an optical rotary connector that connects the fibers of a single piece of wood to each other, and for this reason, the rotating body transmits light from both ends of the rotating shaft. It was only possible to take out the signal continuously. Therefore, the amount of information that can be sent and received is limited, and it has not always been possible to perform satisfactory image monitoring.

(Objective of Invention 1) An object of the present invention is to provide an optical rotary system capable of simultaneously and continuously extracting optical signals from each fiber core wire of a multi-core optical fiber/cable that is fed out or taken out from a rotating body. - To provide a connector device.

(Summary of the Invention) The present invention provides a method for connecting each fiber in a multi-core optical fiber cable for extracting optical signals from a rotating body to a rotating plate that rotates on its rotation axis together with the rotating body. Each parallel optical signal output from each fiber core parallel to the rotation axis is guided onto the rotation axis by a reflection member, and each optical signal guided onto the rotation axis is rotated by the optical signal guide member. It is characterized by being taken out of the body.

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

FIG. 1 shows one mode of use of the optical rotary connector device 10 of the present invention for a drum 1 used as a rotating body in an undersea probe or the like. That is, the drum 1 is rotatably supported via a bearing 4, and a multi-core optical fiber cable 5 is wound around the body 2 of the drum 1. In the optical rotary connector device 10 of the present invention, each fiber core wire 6a of the optical fiber cable 6 for taking out an optical signal connected to a monitor section, a control section, etc. is attached to one flange of the drum l. It is fixedly arranged near 3 with a support member 7 interposed therebetween. First to third fiber cores 5a to 5c of the multi-core optical fiber cable 5 are attached to a rotary plate 12, which will be described later, of this connector device IO.

As shown in FIG. 2, the optical rotary connector device 10 of the present invention includes a frame 11 fixedly supported by the support member 7 (see FIG. 1). The above-mentioned rotary plate 12 is disposed on one end side of this frame 11, and this rotary plate 12 is attached to the flange 3 of the drum 1 so as to rotate around the rotation axis of the drum 1. (See Figure 1). A thick portion 12a of the rotary plate 12 protruding into the frame 11 is rotatably supported at one end of the frame 11 via a bearing 14.
A plurality of holes 15 for passing optical signals passing through the thick portion 12a in the thickness direction are provided at intervals in the radial direction of the rotating plate 12. Each hole 15 has a connector 1
3 is fitted and attached to each connector 13, and each of the first to third fiber cores 5a to 5C described above is optically connected to each connector 13, respectively.

A plurality of transparent glass plates 16 are fixedly arranged within the frame 11. Each transparent glass plate 16 has a reflective member 17
A prism 18 is fixed to one reflecting member mounting body 17 located near the rotating plate 12 on the side facing the rotating plate 12, and one reflecting member mounting body 17 is fixed to the other reflecting member mounting body 17. Concave mirror 19 on the side facing the member number face 17
is fixed. On the other hand, several large-diameter concave mirrors 20 are arranged at the other end of the frame 11. Each concave mirror 19.2
0 is arranged so as to be focused on the rotation axis of the rotary plate 12 on the back surface of each anti-fouling member mounting body 17.

A kite member 21 (=j) is attached to each reflective member numeral body 17. This guide member 21 is positioned on the rotation axis of the rotary plate 12 on the back side of the reflective member numeral body 17. A focusing rod lens 21 as a light receiving section is fixed as a light receiving section.
a, and a focusing rod lens 21b for emission, which is fixed at the center of the reflective member bracket 17 with its axis perpendicular to the rotation axis.

It consists of an optical fiber 21c that optically connects these lenses.

A light receiving hole 22 penetrating in the thickness direction is provided at the position where the optical signal is reflected by the prism 18 of the frame 11 and at the position where the optical signal is emitted from each of the focusing rod lenses 21b, 21b. A connector 23 is fitted into each light receiving hole 22 and attached, and each fiber core 6 of the optical fiber cable 6 (see FIG. 1) for extracting an optical signal is inserted into each connector 23.
A to 6C are optically connected.

Next, the operation of the optical rotary connector device 10 of the present invention will be explained. When the multi-core optical fiber cable 5 is paid out or taken out from the drum 1 by the rotation of the drum 1 and each fiber core wire 5a to 5C rotates together with the drum 1, the rotating plate 1
2 rotates in the same direction and at the same speed in synchronization with the drum 1, no stress is applied to each of the fiber cores 5a to 5C. Then, while the drum l is rotating, the first
The parallel optical signal output from the fiber core vA, 5a is
Since this fiber core wire 5a is arranged on the rotation axis of the rotary plate 12, it is directly reflected by the prism 18 and inputted to the connector 23, and the optical fiber cable 6 for extracting optical signals is connected to the connector 23. fiber core 6
It is taken out of the drum l by a.

Further, while the drum 1 is rotating, the parallel light signal output from the second fiber core 5b passes through the transparent glass plate 16 near the rotating plate 12, reaches the concave mirror 19, and is reflected by the concave mirror 19. A focusing rod lens 21a for light reception
is input. As a result, this optical signal is transferred to the optical fiber 21.
c and the output focusing rod lens 21b, and is input to the connector 23, and is connected to the drum 1 by the fiber core 6b.
taken outside.

Further, the parallel light signal output from the third fiber core 5c passes through both transparent glass plates 16 and 16, reaches a large diameter concave mirror 20, is reflected by this concave mirror 20, and is focused for light reception. The light is inputted to the rod lens 21a, further inputted to the connector 23 via the optical fiber 21c and the emitting focusing rod lens 21b, and taken out of the drum 1 by the fiber core 6c.

In this way, the first to third fiber cores 5a to 5c
Each optical signal extracted from the optical fiber cable 6 is sent to a monitor device or a control unit as an information signal for each line.

In the above embodiment, the optical signal from the fiber core 6a of the optical fiber cable 6 is transmitted to the rotary plate 1 by the prism 18.
Since the fibers can be guided to the connector 13 located on the rotation axis of the fibers 5a and L□"il, bidirectional communication is also possible between these fibers.

The connector device 10 of the present invention is attached to the drum 1 by fixedly supporting the frame 11 on the flange 3 via a bearing, and by aligning the rotational axes of the rotating plates 12 with each other within the drum 1. Alternatively, the fiber cores 5a to 5C may be attached to the rotary plate 12 within the drum 1.

(Effects of the Invention) According to the present invention, each fiber core of a multi-core optical fiber cable for extracting optical signals is attached to a rotating plate that rotates in synchronization with a rotating body and with its rotational axis coinciding, Optical signals outputted from each fiber core parallel to the rotational axis are guided to the rotational axis L by a reflecting member, and the guided optical signals are taken out to the outside of the rotating body by an optical signal guide member. Thus, even while the multi-core optical fiber cable is being unwound or taken out from the rotating body, optical signals can be simultaneously and continuously sent to a monitor device or the like from each of the fiber cores. Therefore, it is possible to provide an optical rotary connector device that allows a large amount of information to be obtained while operating a device having a rotating body.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one way in which an optical rotary connector device according to the present invention is attached to a drum, and FIG. 2 is a cross-sectional view of an optical rotary connector device 6 according to the present invention. i---1---Drum, 5---1---Multi-core optical fiber cable, 5a to 5c
-m-fiber core wire, 6-----optical fiber cable for optical signal extraction, 6 a--m-fiber core wire, to----one optical rotary connector device, 11--
--m-frame body, 12-----one rotation plate, 13.23-m-connector, 16-----transparent glass plate, 17------reflective member mounting body, 18, ---m-prism, 19.20--one concave mirror, 21--m-light signal guide member, 21a, 21b-focusing rod lens.

Claims (1)

[Claims] An optical rotary connector device for extracting optical signals from a multi-core optical fiber cable that is fed out and pulled out from a rotating body, the device comprising: a fixedly disposed frame; and each two-eye fiber core of the multi-core optical fiber cable. a rotary plate which is attached along the radial direction and rotates about its rotational axis together with the rotating body on one end side of the frame; attached to the transparent plate and the other end side of the frame, and each of the fibers/<
a plurality of reflecting members that reflect each parallel optical signal output from the core wire and guide it onto the rotation axis; and the rotation axis.
and a plurality of optical signal guide members for receiving each optical signal reflected from each of the reflecting members at a light receiving section disposed in the second part and guiding the respective signals to the outside of the frame. Rotary connector device.