JPH0648324B2 - Method for manufacturing signal line connector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a signal line connector for connecting signal lines such as electric wires and optical fibers.

(Prior art) To connect various signal lines such as electric wires and optical fibers,
Conventionally, various connecting tools and tools have been specified. In particular, as the technology has developed rapidly as in recent years, the connection points such as electric machinery and communication equipment become fine and complicated, and precise connection is required.

Therefore, a connecting tool that meets these requirements has also been demanded. In particular, in the case of a connector for connecting optical fibers, if the optical fibers are connected without making their axes coincide with each other, signal light will leak and signal transmission through the optical fibers will not be possible.

Conventionally, there have been connectors proposed for the purpose of connecting such optical fibers, which are disclosed in Japanese Utility Model Publication No. 54-31002 and Japanese Patent Publication No. 54-32342, and these are shown in FIG. Show.

The conventional connector (30) shown in FIG. 8 is a board (31) and this board (3).
The fixed plate (32) is arranged and fixed to the left and right of (1), and the support plate (33) is arranged and fixed between these fixed plates (32). As shown in FIGS. 9 and 10, the substrate (31) has a V-groove (31) corresponding to the core wire (21) of the optical fiber (20) and the covering material.
a) is formed, and similarly, each fixing plate (32) is also formed with a groove (32a) as shown in FIGS. 9 and 10.

Then, in this connector (30), as shown in FIG. 9, a pair of optical fibers (20) are fitted in the V-groove (31a) with the ends of their respective cores (21) butted against each other. Then, after arranging each fixing plate (32) and supporting plate (33) on it, by fixing them with screws, a pair of optical fibers (2
0) is connected.

However, when manufacturing this connector (30), each V groove (31
A) and the groove (32a) are required to have a considerable accuracy.

When the accuracy of each V-groove (31a) and groove (32a) corresponds to that of the optical fiber (20), each optical fiber (20) is at a predetermined position as shown in FIGS. 11 and 12. Although it is held and has a small connection loss, if the accuracy of each V groove and groove is not good, as shown in Fig. 13, the position of the core wire (21) of the optical fiber (20) deviates from the normal position of the virtual line, and the connection is made. It will cause a loss. To avoid this, each V groove (31a) and groove (32
Since a) must be finished with a fairly high precision, it takes time and effort to manufacture the connector (30) itself, which increases its price. Further, not only is there a problem in the manufacture of the connector (30) itself, but also attention must be paid in the connection work in accordance with the required accuracy, which is considerably difficult.

(Problems to be Solved by the Invention) The present invention has been made in view of the above problems, and the problems to be solved are associated with the accuracy in manufacturing and connecting work in a conventional connector. There is difficulty.

An object of the present invention is to provide a method for manufacturing a signal line connector which can be easily manufactured, is easy to connect, and has high accuracy.

(Means for Solving the Problems) That is, according to the present invention, at least two U-shaped plates, which are made of resin and have different coefficients of thermal expansion, are joined to each other so that they are not separated from each other. A method for manufacturing a signal line connector, in which a signal wire housing groove is formed by forming a signal wire into a plate made of a resin by press-fitting the wire material so as to be intimately contacted with each other by utilizing a difference in thermal expansion.

(Operation) Therefore, in the method of manufacturing a signal line connector according to the present invention, at least the inner plate is made of resin and two U-shaped plates having different coefficients of thermal expansion are joined so as not to be separated from each other,
This is heated and thermally expanded to bring the inner side into close contact, and at the same time, sandwich a wire having the same shape as the signal line to be connected to the inner side, press it into a plate made of resin, and accurately form the signal line storage groove. be able to.

(Example) Next, this invention is demonstrated according to drawing.

FIG. 1 is a perspective view of a signal line connector manufactured by the manufacturing method according to the present invention. This signal line connector (1
0) is a plate made of two U-shaped resins having different coefficients of thermal expansion
(11) and (12) are joined together.

Further, in the signal line connector (10) in this embodiment, as shown in FIG. 2, the outer plate (12) and the inner plate (12) of the upper tip portion (10a) of the two plates joined together are connected. The plate (11) and the insertion hole (16
The a) and the screw hole (16b) are formed with their axes aligned. The screw portion of the expanding member (15) inserted through the insertion hole (16a) is screwed into the screw hole (16b). Of course, the head of the expansion member (15) can freely move up and down in the insertion hole (16a).

Further, a signal line storage groove (14) in which signal lines such as electric wires and optical fibers are arranged inside the tip part of the signal line connector (10), that is, inside the upper end part (10a) and the lower end part (10b), respectively. ) Is formed.

The signal line receiving groove (14) is formed in a state corresponding to the base portion and the core wire (21) of the signal line (20) as shown in FIGS. 4 and 5.

The signal line connector (10) configured as described above is used as follows. The tip portion of the signal line connector (10), that is, the upper tip portion (10a) and the lower tip portion (10b) are usually
Although they are in close contact with each other as shown in FIGS. 1 and 2, if the upper tip portion (10a) and the lower tip portion (10b) are expanded by using the expansion member (15), As shown in FIG. 3, the signal line (20) is housed in the signal line housing groove (14) using the space formed thereby.

After that, set the position of each signal line (20) and then expand
When the signal line (20) is returned to its original state, the signal line (20) is pressed and held because the inner surface of the signal line connector is closely attached.

Next, a method of manufacturing the signal line connector according to the present invention will be described with reference to FIGS. 1, 6, and 7. First,
As materials for the two U-shaped plates (11) and (12) having different thermal expansion coefficients, the plates shown in the following examples were used.

(A) When a synthetic resin made of the same material is used and one of them is added with an additive such as glass fiber or calcium carbonate to change the coefficient of thermal expansion.

Acrylic nitrile / styrene resin with 20% glass fiber added as the inner plate (11) (coefficient of thermal expansion 2.8 × 10 cm / cm
/ ° C) Acrylonitrile-styrene resin (coefficient of thermal expansion 6 to 7 x 10 cm / cm / ° C) as the outer plate (12) (b) When different kinds of synthetic resins such as thermosetting and thermoplastic resins are used.

Phenolic resin (coefficient of thermal expansion 4 ~ 6 ×) as the inner plate (11)
10 cm / cm / ° C) When an acrylonitrile-butadiene-styrene resin (coefficient of thermal expansion) 7 to 12 × 10 cm / cm / ° C) is used as the outer plate (12).

(C) Both are thermoplastic resins, but the types are different.

Polyethylene (coefficient of thermal expansion 6 to 8 x 10 as the inner plate (11)
cm / cm / ℃) Nylon 66 (coefficient of thermal expansion 10 to 15 x 10 cm) as the outer plate (12)
/ Cm / ° C) The U-shaped inner plate (11) and the outer plate (12) are formed of materials having different coefficients of thermal expansion as described above, and these U-shaped plates (11) and (12) are bonded with an adhesive. Bonding is performed so that they are not separated from each other.

The materials of the two plates having different thermal expansion coefficients may be at least the inner plate is a resin plate, and the outer plate may be any material such as metal.

The two flat plates may be joined together and then formed into a U-shape. Of course, the joining of the inner plate (11) and the outer plate (12) does not have to be performed by bonding with an adhesive agent, but may be joined by, for example, bolts, screws, rivets, etc., Further, the two plates (11) and (12) may be welded and joined together.

Then, the inner plate (11) and the outer plate joined in this way
Heat the plate of (12). In this case, the heating temperature is
The temperature is set so that the (11) and the outer plate (12) do not melt and the joint between them does not melt. When heated in this way, the outer plate has a higher coefficient of thermal expansion than the inner plate (11), and the difference in the coefficient of thermal expansion between the two causes the outer plate (12) having a higher coefficient of thermal expansion to expand. Due to the force, the insides of the signal line connector (10) come into contact with each other and adhere to each other. At this time, as shown in FIGS. 1 and 7, by sandwiching the signal wire (20) to be connected or a wire rod having the same shape as the resin wire of the signal wire connector, the outer plate ( Due to the expanding force of 12), the wire rod is pressed into the inner resin plate (11), and the inner plate (11) and the outer plate (12) are cooled and solidified to form the wire rod shape. The plate (1) inside the signal line storage groove (14)
It can be formed in 1) at the same time. Since the present invention utilizes the difference in thermal expansion, when the inner plate has a larger coefficient of thermal expansion than the outer plate, the inner plate can be brought into close contact with the housed force.

(Effect of the Invention) As described in detail above, according to the present invention, at least the inner plates are made of resin and are joined together so as not to be separated from each other. This is a method of manufacturing a signal line connector in which the inside is closely contacted by utilizing the difference in thermal expansion and the signal wire housing groove is simultaneously formed by press-fitting a wire into a resin plate.

Therefore, a highly accurate signal line connector can be easily manufactured.

By using the signal line connector manufactured in this way, the signal line connection work can be performed easily and reliably at the site.

[Brief description of drawings]

FIG. 1 is an inclined view of a signal line connector manufactured by the manufacturing method according to the present invention, FIG. 2 is an enlarged vertical sectional view taken along line II-II of FIG. 1, and FIG. Sectional drawing which shows the state which expanded the signal line connection tool shown in the figure by the expansion member,
FIG. 4 is an enlarged vertical sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is similarly cut along line IV-IV in FIG.
Further, enlarged vertical sectional views showing a state in which a signal line is fitted therein, FIGS. 6 and 7 show specific examples of the manufacturing method according to the present invention, and FIG. 6 shows an inner plate and an outer side before joining. Fig. 7 is a longitudinal sectional view of the plate of Fig. 7, Fig. 7 is a longitudinal sectional view of the joined inner and outer sides, and Figs. 8 to 13 are views showing a conventional connector, and Fig. 8 is an exploded perspective view thereof. 9 is a plan view of the support plate, FIG. 10 is an enlarged bottom view of the fixing plate, FIG. 11 is a side view with the optical fiber fixed, and FIG. 12 is a view taken along the line I-I of FIG. FIG. 13 is an enlarged vertical sectional view of an essential part, and FIG. 13 is an enlarged sectional view showing another state of FIG. Explanation of symbols 10 …… Signal line connector, 10a …… Upper tip part 10b …… Lower tip part, 11 …… Inner plate 12 …… Outer plate, 14 …… Signal line storage groove 15 …… Expand Member, 16a ... Insertion hole 16b ... Screw hole, 20 ... Signal line

Claims (4)

[Claims] 1. At least two U-shaped plates, which are made of resin and are bonded to each other so as not to separate from each other and have different coefficients of thermal expansion, are heated to thermally expand, and the difference in thermal expansion is used to A method of manufacturing a signal line connector, which is formed so as to be in close contact with each other, and a wire material is press-fitted into a resin plate to simultaneously form a signal line storage groove. 2. The two plates are synthetic resins made of the same material, and one of them is added with an additive such as glass fiber or calcium carbonate to change the coefficient of thermal expansion. A method of manufacturing a signal line connector according to claim 1. 3. A signal line connector according to claim 1 or 2, wherein one of the two plates is made of a thermosetting resin and the other is made of a thermoplastic resin. Production method. 4. The signal line connector according to claim 1, 2, or 3, wherein both of the two plates are made of a thermoplastic resin and the types thereof are different. Production method.