JPH0715314Y2 - Cable connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cable connection structure for connecting a cable connected to an underwater transducer used underwater.

[Conventional technology]

FIG. 4 is an overall view showing a conventional cable connection structure,
In the figure, 1 is a wave transmitter / receiver used to measure noise in water, and 2 is a cable connected to the wave transmitter / receiver 1. The other end of the cable 2 has a terminal portion. 3 is provided, and a water pressure resistant container 5 having an electronic circuit 4 accommodated therein is attached via the terminal portion 3.

Reference numeral 6 is a submarine cable connected from the water pressure resistant container 5 to the land.

7 is a cable 2 between the transducer 1 and the water pressure resistant container 5.
The preamplifier 7 is provided in the middle of, and the preamplifier 7 electrically amplifies the sound coming into the transducer 1 when the transducer 1 performs noise measurement in water. is there.

When it is electrically amplified by the preamplifier 7, it is sent to the water pressure resistant container 5 via the cable 2 and is processed by the electronic circuit 4 in the water pressure resistant container 5, and the submarine cable 6 It has a structure to send to land.

By the way, the transducer 1 has depths from the water surface of 50m, 100m, 150m.
They are provided at the respective positions of m, and thus, in order to install the plurality of transducers 1 at equal intervals, the connection portion 8 is used. This connecting portion 8 is set by connecting the cables 2 to each other between the preamplifier 7 and the terminal portion 3 and adjusting the length of the cable 2 so that each transducer 1 has its respective depth. There is.

The connecting portion 8 is also used when the transmitter / receiver 1, the preamplifier 7 and the terminal portion 3 are inspected or replaced.

Next, the detailed structure of the connecting portion 8 will be described with reference to FIG.

FIG. 5 is a sectional side view of a main portion showing the structure of the connecting portion of the cable connecting structure.

In FIG. 5, reference numeral 2 is a cable facing each other, and the cable 2 is composed of a plurality of core wires 9 and a jacket 2a covering the core wires 9.

Then, the core wires 9 are exposed from the opposite ends of the respective cables 2, and the tips of the core wires 9 are crimped by the crimp terminals 10, so that the transducer 1 side and the terminal portion 3 side Both cables 2 and are electrically connected.

Reference numeral 11 is an insulating sleeve provided so as to cover the portion connected by the crimp terminal 10 and the exposed portion of the core wire 9. The insulating sleeve 11 prevents contact with other core wires 9. It is designed to prevent short circuits.

Reference numeral 12 is a self-fusion tape 12 as a protective material for waterproofing the thus connected portion. First, after taping the periphery of the crimp terminal 10, the entire tape including the end portion of the cable 2 is taped. To do.

Reference numeral 13 denotes a protective tape, which is pressed and wound to protect the outer circumference of the self-bonding tape 12, and is further wound around the outer circumference of the self-bonding tape 12.

Thus, as shown in the figure, the core wire 9 of the cable 2 is
First, after being covered with an insulating sleeve 11, the periphery of the insulating sleeve 11 is taped with a self-sealing tape 12, and the other self-sealing tape 11 is also taped with another insulating sleeve 11 that is also taped.
The entire tape including the end portion of the cable 2 is taped by 12. Finally, the outer circumference is taped with a protective tape 13.

In this way, the core wire 9 of the cable 2 is protected in multiple layers to maintain waterproofness and water pressure resistance.

The shape and dimensions of the connecting portion 8 are different from those of the outer jacket of the cable 2.
Sufficient length and diameter to maintain watertightness with 2a.

[Problems to be solved by the device]

However, the above-mentioned transducers, etc. on the water of the sea or lake,
During the laying work, or after the laying work is completed and the product is installed in water, some external force may be applied to the outer jacket of the cable, which may scratch or break the cable. Then, water is infiltrated from the scratch or the broken portion, the infiltrated water reaches the core wire of the cable, and reaches the connecting portion along the cable.

Here, the waterproofing of the protective material and the cable jacket in the connection part is completely sealed by taping,
If the cable core is flooded, it runs between the crimp terminal, the insulating sleeve and the self-bonding tape, and reaches the preamplifier and the transducer. According to this, the preamplifier and the transmitter / receiver have a poor insulation and cannot be used.

Then, not only this water, but also the other end portion and the water pressure resistant container are similarly flooded, and the insulation is similarly unusable, which makes it unusable.

In addition, taping the connection part to a completely sealed state is a very difficult task, and if an inexperienced person does not do this work, it may not be completely sealed or the finished size and shape may not be adjusted. There is a problem that variations occur.

Therefore, the present invention has been made to solve the above-mentioned problems, and by completely protecting the connection portion in a watertight state, even if water is flooded into the cable due to a scratch or disconnection, the connection portion is To prevent the preamplifier and the transmitter / receiver after the connection part, the terminal part and the water pressure resistant container from being flooded.

Further, it is an object of the present invention to provide a reliable cable connection structure in which there is no variation and there is no fear of water leakage, etc.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention is to connect a plurality of core wires exposed from the ends of the cables to be connected to each other through metal terminals, and to connect the connected portions to be waterproof and water resistant. In the cable connection structure covered with a pressure-sensitive protective material, the terminal is made of a solid rod-shaped member,
Each end is provided with a bottomed hole into which the ends of the plurality of core wires can be inserted with a predetermined length, and the ends of the core wires of the respective cables are inserted into the holes of this terminal from both ends. To secure the connection, and to provide a rubber part by baking in the center of the periphery of this terminal to interpose between each terminal, around this rubber part, and around the terminals protruding from the rubber part on both sides. In addition, the entire connecting portion including the periphery of each core wire exposed between this terminal and each other's cable and the periphery of the end portions of both cables are integrally covered with a protective material by a rubber mold. .

[Action]

With the above-described configuration, the rubber portion is baked on the terminal so as to be integrated so as to prevent the terminals from contacting each other, and then the core wires of the cables to be connected are inserted into the holes at both ends of the terminal.
Then, this is caulked and connected by soldering, crimping or the like to electrically connect both cables.

After this, use a simple mold that can be easily performed on-site work, etc. by heating and pressurizing work as in the case of the above-mentioned connector, heating with a heater etc. and pressing determines the tightening force. Then, it is baked and molded with a rubber molding material so as to cover the entire connection point and the entire ends of the cables.

As a result, a connection portion is formed that can reliably maintain water tightness and water pressure resistance.

The connections are arranged between the preamplifier and the terminal, respectively near the preamplifier and the terminal. If a scratch or a wire breakage occurs between the two, water enters the cable and travels through the cable to reach the respective preamplifier-side and terminal-side connecting portions.

However, the tip of the core wire is fixed to the bottomed hole of the terminal, and the outer periphery of the core wire is covered and molded with a rubber molding material, so that water cannot be further submerged and is stopped there. Water will be prevented both on the preamplifier and on the opposite end.

〔Example〕

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

FIG. 1 is a side sectional view of an essential part showing an embodiment of the cable connecting structure of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is an overall view of the cable connecting structure.

First, in FIG. 3, 1 is a transmitter / receiver, 2 is a cable,
3 is a terminal portion, 4 is an electronic circuit, 5 is a water pressure resistant container, 6 is a submarine cable, and 7 is a preamplifier, which are almost the same as the conventional ones and are similarly connected and arranged by the cable 2.

14 has the transmitter / receiver 1 at each predetermined depth,
The connecting portion 14 connects the cables 2 to each other. The connecting portions 14 are provided between the preamplifier 7 and the terminal unit 3 at two positions, respectively on the preamplifier 7 side and the terminal unit 3 side. Has been.

Next, the internal structure of the connecting portion 14 will be described with reference to FIGS. 1 and 2.

Reference numeral 15 is a rod-shaped terminal made of a metal having good electric and thermal conductivity, such as oxygen-free copper. The terminals 15 are for connecting a plurality of core wires 9 exposed from the respective ends of the cables 2 to be connected to each other, and have a diameter at which the core wires 9 can be inserted at both ends thereof. A bottomed hole 15a is formed.

16 is, for example, a rubber portion formed of a material such as neoprene rubber having excellent weather resistance and water pressure resistance, and having good electric insulation and baking property to a metal, and the rubber portion 16 has the terminals 15 respectively. In addition to holding it so that it does not come into contact with it, it also serves as a reinforcement when performing a molding operation to be described later.

A connector 17 for connecting and connecting the cables 2 to be connected to each other by the terminal 15 and the rubber portion 16.
Are configured.

Reference numeral 18 denotes a rubber molding material made of neoprene rubber or the like as a protective material, and covers and protects the outer periphery of the connection portion including the connector 17 and the end portion of the cable 2.

A procedure for connecting the cable with the above-described configuration will be described.

First, the rubber portion 16 is baked on the terminal 15 to form the connector 17. At this time, since the rubber is heated at 150 ° C and is molded by applying pressure, it is firmly baked on the terminal 15, whereby the terminal 15 and the rubber portion 16 are integrated, and the watertightness and water pressure resistance are improved. The connector 17 is excellent.

Next, the holes at both ends of the terminal 15 of the connector 17 thus formed
The cores 9 of the cables 2 to be connected are inserted into 15a. Then, when this is caulked and fixed by soldering or crimping, the cables 2 are electrically connected to each other.

After that, the entire connecting portion is baked and molded by the rubber molding material 18.

At this time, as a pre-molding treatment, in order to improve the baking property of the surfaces of the terminals 15 and the rubber portion 16 of the connector 17, in order to further remove the release agent adhering to the surface of the rubber portion 16, Roughening is performed about 3 times with sandpaper or the like.

Further, the outer cover of the cable 2 is similarly roughened to remove the paraffin and the like to leave the base material, and finally the primer is used to connect the connector 17, the core wire 9, and the outer periphery of the cable 2, that is, the portion to be rubber-molded. Apply to. It should be noted that the primer is a neoprene rubber type, and Chemilock or the like is preferable.

Then, after performing the mold pretreatment, the above-mentioned connector 17
Although heating and pressurizing work is performed in the same manner as in, the simple type that can be easily performed even on-site work is used.
Heating is performed with a heater or the like, and pressurization is performed by determining the tightening force.

By molding with a mold in this way, the connection portion 14 that reliably retains watertightness and water pressure resistance is formed.

The connecting portion 14 thus formed is arranged between the preamplifier 7 and the terminal portion 3 in the vicinity of the preamplifier 7 and the terminal portion 3, respectively.

By arranging in this way, it is assumed that, for example, a scratch or a wire breakage occurs at a point X between the preamplifier 7 and the terminal section 3 in FIG. As a result, water enters the cable 2 and travels along the cable 2 to the preamplifier 7 side and the terminal section 3.
To the side connection 14. However, the tip of the core wire 9 is a terminal
Since it is press-fitted into the bottomed hole 15a of 15 and the outer periphery thereof is covered with the rubber molding material 18 and molded, water cannot further infiltrate and is stopped there.

For this reason, water does not enter the preamplifier 7 and the terminal section 3 on the opposite side.

The rubber molding material 18 is neoprene rubber or the like, but urethane rubber or the like does not interfere. However, in this case, the terminal 15 of the connector 17 is coated with urethane-based material such as resin, the outer covering of the rubber portion 16 and the cable 2 is only roughened, and the primer is unnecessary.

〔The invention's effect〕

As described above, according to the present invention, a plurality of core wires exposed from the ends of the cables to be connected are respectively connected through metal terminals, and the connected portions are waterproof and waterproof. In the cable connection structure covered with a protective material having a pressure property, the terminal is composed of a solid rod-shaped member, and a bottomed hole into which the end portions of the plurality of core wires can be inserted with a predetermined length at both ends thereof. Each terminal is connected by inserting and fixing the ends of the cores of the cables from both ends into the holes of this terminal, and a rubber portion is provided by baking at the center of the periphery of each terminal. Intervene between
Around this rubber part, around the terminals protruding from the rubber part on both sides, around each core wire exposed between this terminal and each other's cables, and around the end parts of both cables. It was decided to cover the entire connecting part, including the protective material, by using a rubber mold.

As a result, the cable is damaged or broken, and when it reaches the core wire by flooding the cable and reaching the connection part, the tip of the cable core wire is soldered to the bottomed hole of the terminal. Since they are fixed and connected by attaching or crimping, the infiltrated water cannot move any further.

In this way, since the water is stopped at the connection portion, the water will not invade other parts provided after the connection portion.

For this reason, this connection is provided between the preamplifier and the terminal in the vicinity of each, and if a failure occurs between the two, flooding is only allowed between these connections. Since it can be stopped, by exchanging only the cable between this, other parts after the connection part,
That is, the preamplifier, the transmitter / receiver, and the water pressure resistant container containing the terminal portion and the electronic circuit can be used as they are.

Therefore, it is possible to prevent water from scratches or disconnections from being blocked by the connection part as in the conventional case, and to allow water to reach beyond the connection part.
It is possible to prevent these from becoming unusable due to poor insulation.

As described above, by water-molding the entire connecting portion, the watertightness and the water pressure resistance are reliably maintained, and a highly reliable cable connection structure can be obtained.

Also, since this is a molding process, there is no need to be a skilled person to perform this work, and even an inexperienced person can easily perform this work, and the reliability of watertightness also decreases. Of course, there is no variation in shape.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main portion of a connecting portion showing an embodiment of the cable connecting structure of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.
FIG. 3 is a side view showing the whole of the cable connecting structure, FIG. 4 is a side view showing the whole of the conventional cable connecting structure, and FIG. 5 is a side sectional view showing the main part of the conventional cable connecting structure. 1 ... Transmitter / receiver, 2 ... Cable 3 ... Terminal part, 5 ... Water pressure resistant container 7 ... Preamplifier, 9 ... Core wire 14 ... Connecting part, 15 ... Terminal 16 ... Rubber part , 17 …… Connector 18 Rubber molding material

Claims (1)

[Scope of utility model registration request] 1. A plurality of core wires exposed from the ends of the cables to be connected are connected to each other via metal terminals, and the connected portions are made of a protective material having waterproofness and water pressure resistance. In the covered cable connection structure, the terminal is made of a solid rod-shaped member, and each end thereof is provided with a bottomed hole into which an end portion of the plurality of core wires can be inserted with a predetermined length. The ends of the cores of the respective cables are inserted into and fixed to the holes by inserting the ends from both ends, and a rubber portion is provided by baking at the center of the periphery of the terminal to interpose between the terminals. Including the circumference of the rubber part, the circumference of the terminal protruding from the rubber part on both sides, the circumference of each core exposed between this terminal and each other's cable, and the circumference of the end part of both cables. The entire connection is rubber Cable connection structure characterized in that covered integrally with a protective material by Rudo.