JPS63231804A - Multiplex transmission cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a power supply and signal line integrated cable used in a multiplex transmission system for transmitting many signals through a pair of communication lines. It is.

(Conventional technology) FIG. 2 shows an example of a single-carry multiplex transmission system.

That is, in Fig. 2, (5) and (6) are the multiple terminals, (7), (8), (9), and (10) are the loads and switches connected to the multiple terminals, and (1 ′)
, (2') a power line for supplying power to the ld multiplex terminal, and (3'), (4') a signal line to the ld multiplex terminal.

Conventionally, as shown in Fig. 5, power lines (1), (2) and signal lines (3), (4) were wired with normal electric wires or twisted pairs.
d pair ) wires connect connectors (21), (22)
Either connect them sequentially through a wire, or take a joint with an electric wire and wire it to each terminal.

In FIG. 5, arrow (A) indicates coming from the previous terminal, arrow (B) indicates coming from the previous terminal, and the same reference numerals as in FIG. 2 indicate the same parts.

(Problems to be Solved by the Invention) However, in the conventional means as described above, ■ Because the power line and signal line are connected to the terminal via a connector, a cable with a connector with a wire length depending on the system is required. It is necessary to create

■ Since the power line and signal line are separated, it is necessary to consider the position of the wiring so that the signal line is not affected by noise from the power line.

In view of the above, the present invention was developed to solve these problems.

(Means for solving the problem) That is, the present invention holds two tape-shaped conductor plates parallel to each other at a constant interval, and the two parallel conductor plates are
A multilayer structure characterized in that two conductor wires are arranged parallel to the parallel conductor plates on a plane passing through the center between the conductor plates, and each conductor plate and the conductor wires, including the gaps, are covered with an insulator. It is a transmission cable.

(Function) As will be understood from the explanation below, in the above case, the conductor plates serving as the two power supply lines are placed close to each other, so that the main power supply immunity can be lowered.

Further, due to the above-mentioned arrangement relationship between the two conductive wires serving as signal lines and the conductive plate serving as two power supply lines, the Talostalk can be reduced.

Moreover, these conductive plates and conductive wires can be connected by contacting with pressure contact terminals from above the covered insulator.

The invention will be explained in more detail below with reference to the drawings.

FIG. 1 shows a cross-sectional shape of a multiplex transmission cable according to the present invention. The power supply conductor is composed of two opposing ribbon-shaped plates (there is no problem even if some of the plates are bent) as shown in (1) and (2). By making the distance between the drawing boards close enough to withstand voltage, the capacitance between the lines increases and a low impedance power supply line can be constructed.

In addition, as shown in (3) and (4), the signal wires are placed in parallel with the two conductors for the power supply and close to each other at equal distances, so they are most susceptible to electrostatic induction from the power supply wires. The arrangement is such that it is difficult to be guided.

These conductors (1), (2), (3), and (4) are all covered with an insulator (11), but as shown in Figure 4, the power lines (1), (2) , signal lines (3), (4) and iron insulation displacement terminals (15), (16), (17), (18), as shown in FIG. Multiple terminals can also make direct contact.

3 and 4 will be explained in detail this evening.

In Figure 3, (5) is the main body of the multiplex terminal, (1
Due to the hinge part 9), when it is not attached to a cable, it is in an open state as shown in Figure (b). The inner notch (14) that matches the outer shape of the cable has insulation displacement terminals (15) and (1) for contacting the power line and signal line.
6), (17), and (18) are shown.

By simply inserting this into the cable according to the present invention as shown in FIG. 4(a), the pressure contact terminal contacts each conductor as shown in FIG. 4, and the connection is completed.

(20) is a locking mechanism. Figure 4 shows a cross-sectional view of the multiplex terminal with the external hatch removed.
22) is a circuit section.

It should be noted that the multiplex transmission group according to the present invention shown in FIG.
The grooves shown in 12) and (16) are effective for positioning the pressure contact terminals (17) and (18) to correctly connect them to the signal lines (6) and (4) when installing the multiplex terminal (5) to this cable. It is.

(Effects of the Invention) The multiplex transmission cable of the present invention as described above has the following effects.

■ Multiple terminals can be easily attached to the cable according to the present invention at any position without cutting the cable or processing the terminals (such as stripping or attaching terminals).

■ Since the two power supply lines are placed close to each other, the power supply impedance can be kept low regardless of the length of the cable.

■ The structure has low mutual talostalk due to the arrangement of power supply lines and signal lines, and the signal lines are less susceptible to the effects of power supply noise.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the multiplex transmission cable of the present invention, Fig. 2 is a configuration and connection side view of a general multiplex transmission system, and Fig. 3 is a state diagram of the multiplex transmission cable of the present invention with a multiplex terminal attached. Figure (a)) and the state diagram of the multiplex terminal before it is attached to the transmission group of the present invention (Figure (b)), the fourth
The figures each illustrate perspective cross-sectional shapes when multiple terminals are attached to the cable of the present invention. (1), (2)...Power supply conductor (conductor plate), (1')
, (2')...Power line, (3), (4)...Signal conductor (conductor wire), (3'), (4')...Signal line, (5
), (6)...multiple terminal, (7), (8], (
9 people (10)...Loads connected like multiple terminals,
Switch (11)... Cable insulation coating (e.g.
etc.), (12), (13)...grooves in the cable sheath,
(15), (16), (17), (18)...Multiple terminal pressure contact terminal procedure amendment June 24, 1988 Patent application No. 63559 of 1988 Z Do not misrepresent the name of the invention Vε11-, File 3, Relationship with the case of the person making the amendment Patent applicant address: 5-15 Kitahama, Higashi-ku, Osaka (213) Sumitomo Electric Industries, Ltd. Name: Representative President, Tetsube Yojo 4, Agent 5・Date of the amendment order: May 6, 1930 (Shipping date: May 26, 1982) 1) In the fourth line from the top of page 7 of the specification, "each is exemplified" was corrected as follows: do. ``, Figure 5 illustrates a perspective external view of a conventional multiplex transmission cable with a multiplex terminal attached to it.''

Claims (2)

[Claims] (1) Hold two tape-shaped conductor plates parallel to each other at a constant interval, and place two conductor wires on a plane that is parallel to the conductor plates of the two parallel conductor plates and passes through the center between the two conductor plates. A multiplex transmission cable characterized in that parallel conductor plates are arranged parallel to each other, and each of these conductor plates and conductors, including the gaps, are covered with an insulator. (2) Two tape-shaped conductor plates and two
The multiplex transmission cable according to claim (1), wherein grooves are provided in the portions corresponding to between the conductors of the main conductor and the portions corresponding to the portions corresponding to the respective conductors of the two conductors.