JP3169863U - Waterproof cap - Google Patents

Abstract

Provided is a waterproof cap that can be easily attached to various cables having different outer diameter sizes and can ensure high waterproofness. A waterproof cap 11 that covers an end portion of a cable 12 and waterproofs the end portion of the cable 12 is formed of an elastic material having elasticity, and a sealing recess 21 into which the end portion of the cable 12 is fitted. And the side surface 22 that continues from the sealing recess 21, the side surface 22 is folded back, the folding position 23 is the opening end of the sealing recess 21, and the folding position 23 is the length of the waterproof cap 11. Can change direction. [Selection] Figure 1

Description

  The present invention relates to a waterproof cap that is attached to an end of a cable and waterproofs the end of the cable.

  A cap that is attached to the end of a cable such as a covered wire, and that is made of elastic rubber or plastic as a cap to prevent the ingress of water and deterioration of the wire due to moisture. What forms a some ring-shaped projection part at intervals is known (for example, refer patent documents 1 and 2). Moreover, the protective device which carries out the insulation protection of the terminal part of an electric wire is also known (for example, refer patent document 3).

Japanese Patent No. 3098444 Japanese Utility Model Publication No. 48-15322 Japanese Utility Model Publication No. 49-15760

  Since the caps of Patent Documents 1 and 2 have a structure that ensures waterproofness by tightly attaching the cap ring to the outer peripheral surface of the cable, if the inner diameter of the cap ring is too small, it is difficult to attach the cap ring to the cable. Moreover, if the inner diameter of the cap ring is too large, waterproofness cannot be ensured. Therefore, for cables with different outer diameters, various caps with different cap ring inner diameters must be prepared, and caps having cap rings with slightly smaller inner diameters than the cable outer diameter must be selected and used. did not become. In addition, it is difficult to obtain sufficient waterproofness in a structure in which a ring-shaped cap ring is brought into contact with the outer peripheral surface of the cable to ensure waterproofness.

  Further, the cap of Patent Document 3 has a structure in which the inner wall provided radially inside is in close contact with the outer peripheral surface of the cable and is attached to the end of the cable by friction with the outer peripheral surface of the cable. In such a radially formed inner wall, it is difficult to ensure waterproofness with the cable.

  Therefore, an object of the present invention is to provide a waterproof cap that can be easily attached to various cables having different outer diameter sizes and can ensure high waterproofness.

The waterproof cap according to the present invention that can solve the above-mentioned problem is a waterproof cap that covers the end of the cable and waterproofs the end of the cable,
Formed from elastic material with elasticity,
A sealing recess into which an end of the cable is fitted, and a side surface continuing from the sealing recess,
The side surface is folded, the folded position is the opening end of the sealing recess, and the folded position can be changed in the length direction of the waterproof cap.

  The waterproof cap of the present invention is preferably formed from an elastic material having a phthalate content of less than 0.1% by weight.

  In the waterproof cap of the present invention, it is preferable that the folded side surface is wound.

  The waterproof cap of the present invention covers the end portion of the cable while applying the opening end of the concave portion to the end portion of the cable having an outer diameter larger than the inner diameter of the cap, and returning the side surface of the cap. The cap is made of an elastic material having elasticity, and the inner surface of the cap and the outer peripheral surface of the cable are in close contact with each other by the elastic force, so that the cap can be reliably waterproofed. Since the cap folding position can be changed, it is possible to smoothly return the cap side. Since the waterproof cap of the present invention has elasticity, it has a single size and can be attached to the ends of cables having a plurality of outer diameters.

It is sectional drawing before the example of embodiment of the waterproof cap which concerns on this invention is shown, and the attachment to a cable edge part. It is sectional drawing of the waterproof cap with which the cable end part was mounted | worn. It is sectional drawing in the middle of attachment to the cable edge part of the waterproof cap which concerns on a modification.

Hereinafter, an example of an embodiment of a waterproof cap according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the waterproof cap 11 according to this embodiment is attached to the end of a cable 12. The cable 12 to which the waterproof cap 11 is attached is an insulated cable in which a conductor made of, for example, copper or copper alloy is covered with a jacket made of resin.

  The waterproof cap 11 has a sealing recess 21 at the center thereof, and the end of the cable 12 is fitted into the sealing recess 21. The waterproof cap 11 includes a side surface 22 that continues from the sealing recess 21. The side surface 22 is folded at a folding position 23. The folding position 23 is the opening end of the sealing recess 21.

  The waterproof cap 11 is formed from an elastic material having stretchability, and is particularly preferably formed from an elastic material such as rubber having excellent stretchability. Examples of the elastic material forming the waterproof cap 11 include ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, olefin elastomer, urethane elastomer, polyamide elastomer, polyester elastomer, styrene elastomer, ethylene Examples include propylene rubber, acrylic rubber, nitrile rubber, epichlorohydrin rubber, chloroprene rubber, silicone rubber, styrene / butadiene rubber, butadiene rubber, fluorine rubber, or butyl rubber. It is desirable to use an elastic material that does not contain a phthalate ester added as a plasticizer of polyvinyl chloride (PVC) or an elastic material that contains less than 0.1% by weight. These elastic materials have elasticity even if the addition amount of the phthalate ester is as small as 0.1% by weight or not, and the adhesion to the cable 12 when used in the waterproof cap 11 is achieved. good.

  In order to attach the waterproof cap 11 to the end of the cable 12, first, the end of the cable 12 is inserted into the sealing recess 21 of the waterproof cap 11.

  Next, the cable 12 is covered with the side face 22 of the waterproof cap 11 folded back with respect to the sealing recess 21 while being folded back. As the side 22 is turned back, the turn-back position 23 changes in the length direction of the cap. Then, as shown in FIG. 2, the waterproof cap 11 is attached to the cable 12 so as to cover the end portion thereof, and the side surface 22 is in close contact with the outer peripheral surface of the cable 12. Note that when the waterproof cap 11 is attached, all the side surfaces 22 may be folded back so that the entire side surface 22 is in close contact with the outer peripheral surface of the cable 12.

  In the waterproof cap in which the side surface 22 is not folded back in advance and the inner diameter of the side surface 22 is smaller than the outer diameter of the cable 12, the end of the side surface 22 is connected to the cable 12 before the tip of the cable 12 reaches the sealing recess 21. It sticks to the outer peripheral surface of the tip of the. Due to the friction, it is difficult to put the cable 12 inside the side surface 22, and it is extremely difficult to attach the waterproof cap 11 to the end of the cable 12.

  On the other hand, according to the waterproof cap 11 according to the present embodiment, it is formed of an elastic material having elasticity, and is covered with the end of the cable 12 while the side surface 22 is folded back. Even if the diameter is larger than the inner diameter of the side surface 22, the cable 12 can be mounted on the end of the cable 12 very smoothly.

  Even if the outer diameter of the cable 12 is slightly larger than the inner diameter of the waterproof cap 11, the waterproof cap 11 can be extended and attached to the cable 12. It is possible to protect the terminal in a waterproof state by attaching it to the unit. In particular, if an elastic material such as rubber having excellent stretchability is used, high adhesion to the outer peripheral surface of the cable 12 can be obtained, and a high waterproof effect can be obtained.

  In addition, the waterproof cap 11 is formed of an elastic material having a phthalate content of less than 0.1% by weight which tends to be refrained from use due to the influence of chemical substances on the environment in recent years. The load on can be suppressed.

  The waterproof cap 11 has a shape in which the side surface 22 is folded in advance so as to extend to the side opposite to the cable 12. However, as shown in FIG. 3, the cylindrical portion 22 is opposite to the cable 12. It may be in the form of being folded while being wound in advance.

  Also in this case, since the end portion of the cable 12 is covered while the side surface 22 is folded back, the end portion of the cable 12 is very smoothly covered even when the outer diameter of the cable 12 is larger than the inner diameter of the side surface 22. Can do. The waterproof cap 11 including the folded portion shown in FIG. 3 is easier to attach to the cable 12 than the folded waterproof cap 11 shown in FIG.

11: Waterproof cap, 12: Cable, 21: Sealing recess, 22: Side, 23: Folding position

Claims (3)

A waterproof cap that covers the end of the cable and waterproofs the end of the cable,
Formed from elastic material with elasticity,
A sealing recess into which an end of the cable is fitted, and a side surface continuing from the sealing recess,
The waterproof cap, wherein the side surface is folded, the folded position is an opening end of the sealing recess, and the folded position can be changed in the length direction of the waterproof cap. The waterproof cap according to claim 1,
A waterproof cap formed of an elastic material having a phthalate content of less than 0.1% by weight. The waterproof cap according to claim 1 or 2,
A waterproof cap, wherein the folded side surface is wound.

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