JP2005354862A - Sealing structure of cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing structure of a cable which closes certainly the end face of the tube type sheath of a cable and which prevents liquid from beginning to leak from an opposite side through the interior of the cable. <P>SOLUTION: The cable sealing structure is constituted by inserting a plurality of bungles of electric wires 3 made of a conductor and an insulator covering the outer periphery of the conductor inserted into tube type sheathes 5. The wire 3 coming out of at least one end surface of the tube type sheath 5 is passed to a ring 12. A tube type cover 13 is mounted on the outer periphery of the tube type sheath 5 and the outer periphery of the link 12. A gap is constituted at the inside of the tube type cover 13. A resin 14 is filled in the gap. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cable sealing structure that prevents liquid from leaking from a gap between an electric wire and a tubular sheath.

Conventionally, a cable structure configured by bundling a plurality of electric wires made of a conductor and an insulator covering the outer periphery of the conductor and inserting the same into a tubular sheath is as shown in FIG.
In the figure, 1 is a conductor, 2 is an insulator, 3 is an electric wire, 4 is a tape, 5 is a tubular sheath, 6 is a cable, and 7 is a gap inside the cable. The insulator 2 covers the outer periphery of the conductor. The electric wire 3 includes a conductor 1 and an insulator 2. The tape 4 bundles a plurality of electric wires 3. A plurality of electric wires 3 bundled with a tape 4 are inserted into the tubular sheath 5. The cable 6 includes a plurality of electric wires 3 and a tubular sheath 5 that are bundled by a tape 4. The cable internal gap 7 is a gap inside the cable configured between the electric wire 3 and the tubular sheath 5.
As described above, the cable is configured by bundling a plurality of electric wires 3 made of the conductor 1 and the insulator 2 covering the outer periphery of the conductor 1 and inserting them into the tubular sheath 5.
In addition, there is a cable terminal unit that can be easily connected to an appliance or the like and can save the trouble of insulation treatment and waterproof treatment (for example, Patent Document 1).
Japanese Utility Model Publication No. 6-60248

However, in the conventional cable structure, when liquid adheres to one of the end surfaces of the tubular sheath or one of the end surfaces of the tubular sheath is immersed in the liquid, the liquid penetrates into the gap inside the cable, and the liquid leaks to the end surface on the opposite liquid side of the tubular sheath. Sometimes. As shown in FIG. 4 in which the liquid is attached to or immersed in one of the tubular sheaths, the liquid permeation path 11 penetrates the gap inside the cable so that the liquid 8 penetrates from the tubular sheath liquid side end surface 9 to the tubular sheath anti-liquid side end surface 10. Leak into.
The present invention has been made in view of such problems, and has a cable sealing structure that reliably closes the tubular sheath end surface of a cable with a resin and prevents liquid from leaking from the opposite side through the inside of the cable. The purpose is to provide.

In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is a cable sealing structure configured by inserting a plurality of electric wires made of an insulator covering a conductor and an outer periphery of the conductor into a bundle of tubular sheaths, from at least one end surface of the tubular sheath. The outgoing electric wire is passed through a ring, a tubular cover is attached to the outer periphery of the tubular sheath and the outer periphery of the ring, a gap is formed inside the tubular cover, and the gap is filled with resin.

According to the first aspect of the present invention, the electric wire coming out of at least one end face of the tubular sheath is passed through the ring, the tubular cover is attached to the outer periphery of the tubular sheath and the outer periphery of the ring, and the inner gap is filled with the resin. The tubular sheath end face of the cable can be reliably closed, and liquid can be prevented from leaking from the opposite side through the inside of the cable.
Further, since liquid does not enter the cable, it is possible to prevent the electric wire inside the cable from being deteriorated by the liquid, and to improve the reliability of the cable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1A and 1B are views showing a first embodiment of the present invention, in which FIG. 1A is a side sectional view showing a state where a resin is filled in an end surface on the side opposite to a tubular sheath, and FIG. It is a sectional side view which shows the state filled. In the figure, 8 is a liquid 9 is a tubular sheath liquid side end surface, 10 is a tubular sheath anti-liquid side end surface, 11 is a liquid permeation path, 12 is a ring, 13 is a tubular cover, and 14 is a resin. The ring 12 inserts the electric wire 3 protruding from the end face of the tubular sheath. The tubular cover 13 is held by the outer periphery of the ring 12 and the outer periphery of the tubular sheath 5, and is attached so as to cover the outer periphery of the ring 12 and the outer periphery of the tubular sheath 5. The resin 14 is filled in a gap formed on the end surface of the tubular sheath by the tubular cover 13.
Next, the operation will be described.
The ring 12 and the tubular cover 13 form a gap at one tubular sheath end surface, and the resin 14 is filled in the gap to fill the liquid permeation path 11 on the tubular sheath end surface with the resin 14, so that the liquid 8 is on the tubular sheath liquid side. Leakage from the end face 9 to the tubular sheath opposite liquid side end face 10 is prevented.
By closing the tubular sheath anti-liquid end surface 10 with the resin 14, the liquid 8 that has permeated from the tubular sheath liquid-side end surface 9 is stopped by the resin 14, and leakage of the liquid 8 from the tubular sheath anti-liquid side end surface 10 is prevented. Can do. In addition, by closing the tubular sheath liquid side end surface 9 with the resin 14, the liquid 8 does not enter the gap inside the cable from the tubular sheath liquid side end surface 9, thereby preventing leakage of the liquid 8 from the tubular sheath opposite liquid side end surface 10. be able to.

FIG. 2 is a side sectional view showing a state where both ends of a tubular sheath showing a second embodiment of the present invention are filled with resin.
Next, the operation will be described.
A gap is formed between both ends of the tubular sheath by the ring 12 and the tubular cover 13, and by filling the gap with the resin 14, the liquid permeation path 11 of the tubular sheath end face is closed by the resin 14, and the liquid 8 is on the tubular sheath liquid side. Leakage from the end surface 9 to the tubular sheath opposite liquid side end surface 10 is prevented.
By closing the tubular sheath liquid side end surface 9 and the tubular sheath anti-liquid end surface 10 with the resin 14, the liquid 8 does not enter the cable internal space from the tubular sheath liquid side end surface 9. Leakage can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Example of this invention, (a) is a sectional side view which shows the state which filled the resin in the tubular sheath anti-liquid side end surface, (b) is the state which filled the resin in the tubular sheath liquid side end surface. Side sectional view Side sectional view which shows the state which filled the resin in the both end surfaces of the tubular sheath which shows 2nd Example of this invention. Side sectional view showing a conventional cable structure FIG. 3 is a side sectional view showing a state in which liquid is attached to or immersed in one of the tubular sheaths of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conductor 2 Insulator 3 Electric wire 4 Tape 5 Tubular sheath 6 Cable 7 Cable internal gap 8 Liquid 9 Tubular sheath liquid side end surface 10 Tubular sheath anti-liquid side end surface 11 Liquid permeation path 12 Ring 13 Tubular cover 14 Resin

Claims (1)

In the seal structure of the cable configured by inserting a plurality of conductors and an electric wire made of an insulator covering the outer periphery of the conductor into a bundled tubular sheath,
Passing the electric wire coming out of at least one end face of the tubular sheath through a ring, attaching a tubular cover to the outer periphery of the tubular sheath and the outer periphery of the ring, forming a gap inside the tubular cover, and resin in the gap A sealing structure for a cable, characterized by filling.

Images