JPH087291B2 - Optical transmitter connection structure and connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an optical transmission body that collects sunlight or artificial light and transmits it to a facility for use. The present invention relates to a structure for connecting an optical transmission body for transmission over a distance and a connection method thereof.

[Prior Art] Conventionally, when transmitting sunlight or artificial light collected by an optical transmission medium over a long distance, it is necessary to connect the optical transmission medium for a long time because the optical transmission medium is manufactured to a standard size in advance. is there. In order not to reduce the light transmission efficiency, it is necessary to match the optical axes of the optical transmission bodies on both sides at the connection portion of the optical transmission bodies.
For this reason, a person holds one end of the optical transmission member, maintains a certain gap from the other optical transmission member that faces the optical transmission member, and uses a guide jig to match the horizontal and vertical directions for connection work. I am doing it. Then, after that, a transparent heat-shrinkable tube is covered around the vicinity of the optical transmission body connecting portion, and silicon rubber is injected into the gap between the two to join them. After curing the silicone rubber,
Cover the connection part with a half-split FEP tube and wrap it with Teflon tape to bond it, and cover the protection tube with a half-cut PVC pipe on the part longer than the vicinity of the optical transmission device connection part, and fix both ends with vinyl tape. As a result, the reinforcement of the optical transmission body and the connection portion are protected from the external environment.

[Problems to be Solved by the Invention] Conventionally, when connecting an optical transmission body, a guide jig is used to align the optical axes. However, since the optical axes are aligned and the optical transmission body is fixed at the same time, this work is required. Requires multiple personnel. In addition, the working time of the optical transmission body of the connection portion in a bare state becomes long, and therefore, there is a risk of contamination of the connection portion due to the external environment, and the transmission efficiency is likely to decrease. Furthermore, after aligning the optical axes of the optical transmitters and joining them,
Since the protection tube is covered with a half PVC pipe in a part longer than the vicinity of the optical transmitter connection part and both ends are fixed with vinyl tape etc., the holding becomes uncertain and contamination from the external environment is prevented. The protection was incomplete.

The present invention is proposed in view of the above-mentioned various problems, and a jig for aligning the optical axes is detachably arranged in the case while the connecting portion of the optical transmission body is located in the case. The purpose is to remove the jig after aligning the shafts and joining them so that the case can easily and securely fix the jig and hold the connection part, and also prevent the connection part from being contaminated externally. .

[Means for Solving the Problems] The present invention achieves the above object, and the connection structure of the optical transmission body is as follows.

Insertion tubes are provided on both sides of the case where the top opening is covered by a lid, and support rings for penetrating and holding the light transmission bodies are provided in both insertion tubes, and the position of the support rings is adjustable, and the light transmission bodies are protected in the insertion tube Screws are provided to secure the tube. The ends of the optical transmitters are inserted into both insertion tubes, the optical transmitters are aligned with the optical axis in the center of the case, and they are fitted to the heat-shrinkable tube and joined with silicone rubber. The insertion tube is held by a support ring fixed by a position adjusting screw, and the protective tube of each optical transmission body is fixed by the screw of the insertion tube.

The method of connecting the optical transmission member is as follows: first, in the central portion of the case having an opening on the upper surface and having insertion tubes on both sides, an optical axis adjusting jig for abutting the optical transmission member is arranged so that the position can be adjusted, Attach L-shaped supports that support the optical transmission body on both sides of the optical axis adjustment jig.

Next, insert the optical transmitters to be connected from both insertion tubes, pass the support ring through each end, and support both ends of the optical transmitters with the L-shaped support and apply them to the optical axis adjusting jig. Secure the protective tube of the light transmitter to the insertion tube with screws. Next, the optical axis adjusting jig is fixed to the case in a state where the optical axes of both optical transmission bodies are aligned with each other, and the support ring is fixed in both insertion tubes. After that, the optical axis adjusting jig and the two L-shaped supports are removed from the case. Next, silicone rubber is filled between the end portions of the two optical transmission members to join them, and the case opening is closed with a lid to complete the connection of the optical transmission members.

The case used for connecting the optical transmission body is a flat rectangular parallelepiped container. The optical axis adjusting jig has an adjusting member that regulates the horizontal and vertical positions of the two optical transmission members,
The adjusting member is movable and adjustable in the horizontal direction and the vertical direction with respect to the case, and is fixed in a state where the optical axes of the two optical transmission bodies are aligned. To connect both optical transmission members, after covering the connection end portion with a transparent heat-shrinkable tube, silicone rubber is filled between the end portions and cured.

[Operation] In the above-described optical transmission body connection structure, the optical transmission body is held by the insertion tube of the case through the support ring, and the protective tube of the optical transmission body is also fixed to the insertion tube by a screw. The outer periphery of the body is reinforced by the case, and the optical axes of the optical transmission body can be reliably maintained in agreement. Further, since the outer periphery of the connecting portion of the optical transmission body is kept in a sealed state by the case, it is possible to prevent contamination from the external environment.

In the method of connecting the optical transmitter, the case can be easily fixed because the jig can be temporarily fixed at the time of connection because the optical axis of the optical transmitter coincides with the case. Since the protective tube is fixedly held on the case side, the optical axes can be surely kept in alignment thereafter. Further, since the outer circumference of the connecting portion of the optical transmission body is hermetically sealed by the case, it is possible to prevent contamination without newly covering with a pipe or the like.

In the above-described optical transmission body connecting method, since a jig for aligning the optical axes of the two optical transmission bodies can be fixed in the case, the optical transmission bodies can be easily and accurately aligned with the optical axes aligned. Can be fixed to the insertion tube of the case. Then, by making the optical axes coincide with each other in this way, a connection structure with good transmission efficiency is obtained. Further, the jig for aligning the optical axes can be easily taken out from the opening after fixing the optical transmission body to the case, and if the opening is sealed with a lid, contamination of the outer periphery of the connection portion can be prevented.

[Example] The connection structure of the optical transmission body of the present invention will be described with reference to Figs.

A case 1 for connecting and holding the light transmission body and covering the outer periphery of the connection portion is formed in a flat rectangular parallelepiped shape having an open upper surface, and insertion tubes 2 are provided on both sides in the longitudinal direction thereof. The ends of the light transmission body 3 are inserted from both insertion tubes 2, and the optical axes of both ends of the light transmission body are aligned and connected at the center of the case 1. In addition, as for the connection of the optical transmission body 3, the optical axes are aligned by using a jig as described in the connection method described later,
Silicon rubber is filled between the connection end faces and joined.

The optical transmission body 3 is held by holding and fixing the support ring 4 penetrating the end thereof to the insertion tube 2 by the three position adjusting screws 4a. Further, the protective tube 5 on the outer circumference of the optical transmission body 3 is fixed by being supported at three points by three fixing screws 5a provided on the insertion tube 2. The insertion length of the end portion of the protection tube 5 is regulated by the projection 6 provided in the insertion tube 2, and the ring packing 7 is provided at the end portion of the protection tube 5 to seal the gap with the optical transmission body 3. ing.

The adjusting screw 4a for the support ring 4 is fixed in a state where the optical axis of the optical transmission body 3 is aligned with a jig.

The lid 8 is screwed to the case 1 to close the upper surface opening of the case 1, and an elastic body seal 3 is interposed between the lid 8 and the case opening edge at the peripheral edge of the lid 8 so that the airtightness is maintained. It has become. The opening of the case 1 is for attaching and detaching a jig for aligning the optical axes.

Next, a connection method for forming the above-mentioned optical transmission body connection structure will be described with reference to FIGS.

First, the optical axis adjusting jig 10 of FIG. 4 used for connection will be described. This optical axis adjusting jig 10 is composed of a vertical substrate 11 that is in contact with two optical transmission members 3 in parallel for adjusting the horizontal position, a horizontal plate 12 that adjusts the vertical position, and a space plate 13 that keeps a constant space. It has an adjusting member 14, and the adjusting member 14 is held by a vertical piece of a holding member 15 having an L-shaped cross section. A screw 17 is inserted through the base of the adjusting member 14,
The holding member 15 can be moved and adjusted in the vertical elongated hole 16 of the holding member 15, and the vertical position of the adjusting member 14 can be adjusted and fixed. Further, a horizontal elongated hole 18 is also provided in a horizontal piece of the holding material 15, and a screw 18a is passed through the horizontal elongated hole 18 so that the holding material 15 can be horizontally moved and adjusted at the central portion of the case to be fixed. In order to match the optical axes of the optical transmission bodies 3 to be connected, a pair of L-shaped support members 19 shown in FIG. 6 are used outside the optical axis adjusting jig 10.

When connecting two optical transmitters 3, first, as shown in FIGS. 5 and 6, an optical axis adjusting jig 10 is temporarily fixed to the central bottom portion of the case 1 so that the position of the optical axis adjusting jig 10 can be adjusted. L-shaped supports 19 are fixed to the bottom of the case with screws on both sides of the jig 10.

Next, as shown in FIG. 7, the ends of the optical transmission body 3 are inserted into the insertion tubes 2 on both sides of the case. In this case, the ends of both the light transmission bodies 3 are penetrated through the inside of the supporting ring 4 which is not fixed in position, and the transparent heat shrinkable tubes 20 are respectively passed around the outer ends of both the light transmission bodies. Then, the end portions of both optical transmission bodies 3 are held by the L-shaped support tool 19 and the optical axis adjusting jig 10 is used.
The protective tube 5 of the optical transmission body is fixed to the insertion tube 2 with the three fixing screws 5a while being applied to the space plate 13. In this state, the optical transmission body 3 is connected to the case 1. A ring packing 7 is provided at the end of the protective tube 5, and the end of the ring packing 7 is regulated by the projection 6 in the insertion tube 2.

Next, the end portions of both optical transmission bodies 3 are abutted against each other with the space plate 13 of the optical axis adjusting jig 10 sandwiched therebetween, and further the vertical plate 11 and the horizontal plate 12
Are brought into contact with both optical transmission bodies so that the optical axes of both optical transmission bodies are aligned with each other, and screws 17 and 18a of the optical axis adjusting jig 10 are tightened to fix the optical transmission body to the case 1. In this state, attach the support ring 4 to the three position adjusting screws 4a.
If it is fixed to the insertion tube 2 with, the optical axis of the optical transmission body 3 can be held in a state of being aligned.

Then, the light adjusting jig 10 and the pair of L-shaped supporting members 19 which are screwed together are removed from the case 1 and taken out through the opening of the case. Then, one transparent heat-shrinkable tube 20 is moved to a central position where it covers the connection ends of both light transmission bodies to be heat-shrinked, and the space between the connection of the light transmission bodies 3 is filled with silicone rubber by an injection needle or the like. Next, another transparent heat-shrinkable tube 20 is superposed on the outer circumference of the previous transparent heat-shrinkable tube and heat-shrinked. When the work is completed, the lid 8 is attached to make the structure dustproof and waterproof. When the injected silicone rubber hardens, the lid 8 is removed, both transparent heat shrinkable tubes 20 are removed, and the opening of the case 1 is closed with the lid 8 again and screwed For example, the connection of the optical transmitter 3 is completed.

[Effect of the Invention] According to the present invention, since the connecting portion of the optical transmission body is covered with the case and the end portion of the optical transmission body is held by the case, the optical axes of the connecting portion of the optical transmission body can be surely matched. It is stable, dust-proof and moisture-proof are improved, the influence of the external environment is small, and the decrease in the efficiency of optical transmission is small even in long-distance transmission.

Also, since the jigs are fixed in the case to connect the optical transmitters, the connecting parts can be attached accurately and firmly.
One person can easily carry out the work, and maintenance can be done by opening the case lid.

As described above, sunlight and artificial light can be transmitted over a long distance to a facility extended from the conventional use range by using a light concentrator, and comfortable lighting and plant cultivation can be performed.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing a connection structure of an optical transmission body of the present invention, FIG. 2 is a side view of a case insertion tube side, FIG. 3 is a bottom view of a case lid, and FIG. FIG. 5 is a perspective view of the axis adjusting jig, FIG. 5 is a plan view of the case in which the cover is removed, FIG. 6 is a side sectional view of the case, and FIG. 7 is a sectional view showing the inside of the case while connecting the optical transmission body. Is. 1; Case, 2; Insertion tube, 3; Light transmission body, 4; Support ring, 5; Holding tube, 8; Lid, 10; Optical axis adjusting jig, 14; Adjusting member, 19; L-shaped support tool

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuichi Maruto 3-24 Kyobashi, Chuo-ku, Tokyo Within Nippon Stone English Glass Co., Ltd. (72) Inventor Fukunishi Kogyo 3-4-2, Kyobashi, Chuo-ku, Tokyo No. Nippon Ishiki Glass Co., Ltd. (56) Reference JP 62-210406 (JP, A) JP 60-53905 (JP, A) JP 63-8052 (JP, U)

Claims (5)

[Claims] 1. An insertion tube is provided on each side of a case whose top opening is covered with a lid, and two optical transmission members penetrating the both insertion tubes are passed through a heat-shrinkable tube in the center of the case. It is joined with silicon rubber, and both optical transmitters are held by a support ring fixed by position adjusting screws in each insertion tube,
A connection structure of an optical transmission body, wherein a protective tube of the optical transmission body is fixed by a screw provided on an insertion tube. 2. An optical axis adjusting jig for abutting an optical transmission member is arranged in a central part of a case having an opening on an upper surface and insertion tubes on both sides so as to be positionally adjustable, and an optical axis adjusting jig. Attach the L-shaped support tool that supports the light transmission body on both sides, insert the light transmission body from both insertion tubes, pass the support ring through each end, respectively, and then support both ends of the light transmission body in the L-shape. Support the optical transmitter with the optical axis adjustment jig and fix both optical transmitters to the optical axis adjustment jig with the screws provided on both insertion tubes to fix the optical transmitter protective tube. Fix the optical axis adjustment jig so that the axes match, and fix the support rings in both insertion tubes.
After that, remove the optical axis adjustment jig and the two L-shaped supports from the case, and then fill the two ends of the two optical transmission members with silicone rubber to join them, and then close the case opening with a lid. For connecting optical transmitters. 3. The light according to claim 2, wherein the case is a flat rectangular parallelepiped-shaped container, and an elastic packing is interposed at a contact portion between the case opening and the lid, and the lid is fixed by a screw. How to connect the transmitter. 4. The optical axis adjusting jig has an adjusting member for regulating the horizontal and vertical positions of the two optical transmission members, and the adjusting member moves and adjusts in the horizontal and vertical directions with respect to the case. The method for connecting an optical transmission body according to claim 2 or 3, which is configured to be possible. 5. The optical transmission medium according to claim 2, wherein the connecting end portions of both optical transmission mediums are covered with a transparent heat-shrinkable tube, and silicone rubber is injected between the connecting end portions so as to be joined. How to connect.