JPH0357074Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a retractable tube-type cable holder used for waterproofing, insulating, fixing, and holding cables in and around cable connection areas.

(Prior Art) A conventional contractible tube type cable holder of this type is disclosed in Japanese Utility Model Application No. 15355/1983.

This retractable tube type cable holder is attached to the third
Shown in Figures A, B and C. In this case, a hollow plastic core 2 carrying a contractible tube 1 in an elastically expanded state and a hollow fixture 3 for connecting a cable are used.
The connection structure with the hollow fixture is such that the end portion 12 of the hollow fixture is
It is structured to abut against the end 14 of the plastic core. Furthermore, in another example (FIG. 3B), the end 12 of the hollow fixture is fitted into the inner surface of the end 14 of the plastic core. 12, the portion connected to the hollow plastic core end 14 was hollow and cylindrical.

(Problem to be Solved) When the connection structure between the hollow fixture 3 and the plastic core 2 is an abutment structure, the ends 14 of the plastic core are freely movable, so the shrinkable tube is placed around them. 1 is installed in an elastically expanded state, its inward contractile force causes deformation of the plastic core 2, causing distortion of the retractable tube 1 installed thereon, When the plastic core 2 is removed by pulling the plastic core removal grip and used for holding a cable, there is a problem in that it may fall off or cause lacerations. Further, in the case of a structure in which the hollow fixture end 12 is fitted into the inner surface of the plastic core end 14, the end 14 of the plastic core 2 held between the shrinkable tube 1 and the hollow fixture 3 is used. When removing the plastic core for actual application to a cable, there is a problem that the gap between the outer diameter of the hollow fixture end and the inner diameter of the plastic core is narrow in the gripping part 15, and it is difficult to remove the core due to the clamping force. had.
Further, since the connecting portion of the hollow fixture 3 with the plastic core 2 has a hollow cylindrical shape, the end portion 12 has high rigidity and can be narrowed depending on the contraction force of the contractible tube 1. Therefore, the cable could not be held properly.
That is, as shown in FIG. 3C, when the plastic core 2 is removed and the shrinkable tube 1 is attached to the cable 20, the diameter of the cable 20 is
Since it is usually much thinner than the inner diameter of the hollow fixture 3, the shape of the contraction tube 1 at the end 12 of the hollow fixture will be bent at a substantially right angle to hold the cable 20. For this reason, the bent portions 13 of the contractible tube 1 are partially unevenly distributed and subjected to tension, resulting in the problem that they may fall off or cracks may occur.

The present invention was developed to solve the above problems, and does not cause deformation due to changes over time due to the contraction force of the retractable tube, and does not cause the retractable tube to fall off or tear after being attached to the cable. The purpose is to obtain a tube-type cable retainer without shrinkage.

(Means for Solving the Problems) According to the present invention, as shown in FIG. 1A, an example is shown in FIG. A removable hollow plastic core 2 for supporting a shrinkable tube, a hollow fixture 3 for connecting a cable connected to one end of the core, and a shrinkable tube 1 having a cover attached thereto in an elastically expanded state.
is a contractible tube type cable holder used for tightly tightening the enclosed cable 20 from the outside to fix and hold the cable 20, and the end portion 14 of the hollow plastic core 2
are inserted or fitted into the inner surface of the end 12 of the hollow fixture 3 and connected thereto, and a plurality of notches 11 are provided in the connection portion of the hollow fixture 3 with the hollow plastic core 2. A collapsible tubular cable retainer is provided.

(Example) Hereinafter, an example of the retractable tube type cable holder according to the present invention will be described. Examples of the shapes shown in FIG. 1A and FIG. 2A and B can be given. As the hollow fixture 3, elastic general-purpose plastic can be used. Its shape is to be used by connecting it to the junction box shown in Figure 1A. Examples include those used for connection in the middle of the cable, as shown in FIG. 2A, and those used for connection at the terminals of the cable, as shown in FIG. 2B.

As the shrinkable tube and the plastic core, End Seal PST, a trade name manufactured by Sumitomo 3M Limited, can be used.

(Function) Hereinafter, the procedure and function of actually applying the retractable tube type cable holder according to the present invention to a cable will be explained using FIG. 1A. That is, FIG. 1A shows an embodiment of the retractable tube type cable holder of the present invention, and shows the state before the cable is fixed and used. The cable 20 to be held by the holder or to be held inside the holder has already been inserted.
In order to contract the elastically expanded retractable tube 1 onto the cable surface, the end 15 of the hollow plastic core 2 is pulled in the direction of the cable while going around the cable in a counterclockwise direction, so that the core is pulled at the end. Spiral cut 1 from part 14
6 and can be completely removed from the retractable tube. As a result, the hollow plastic core 2 supporting the shrinkable tube 1 is removed as shown in FIG.
will be tightly tightened from the outside. As a result of contraction of the retractable tube 1, the end of the hollow fixture 3 provided with the plurality of notches 11 bends due to the contraction force, and stops at a position where the end contacts the outer surface of the cable. The end shape of the hollow fixture 3 has a gentle slope. Therefore, there is no local concentration of tension, so there is no possibility of falling off or cracking.

(Effects of the invention) As explained above, the retractable tube type cable holder according to the invention does not deform over time, and when attached to the cable, the retractable tube does not fall off or tear. This has the effect of improving the reliability of the cable's waterproofing, insulation, fixing, and retention performance.

[Brief explanation of drawings]

FIG. 1A is a schematic diagram showing an embodiment of the retractable tube type cable holder according to the present invention, FIG. 1B is a schematic diagram showing the state when attached to a cable,
FIGS. 2A and 2B are schematic diagrams showing other embodiments,
In Fig. 3, A, B, and C are schematic diagrams showing conventional examples. DESCRIPTION OF SYMBOLS 1... Contractible tube, 2... Plastic core, 3... Hollow fixture, 11... Notch, 12
... Hollow fixture end, 13 ... Tube bent part,
14... Plastic core end, 15... Gripping portion, 20... Cable.

Claims (1)

[Scope of utility model registration request] Consisting of a hollow plastic core for supporting a retractable tube, a hollow fixture for connecting a cable connected to one end of the core, and a retractable tube covered around them in an elastically expanded state,
By removing the hollow plastic core, the shrinkable tube tightly tightens the enclosed cable from the outside, and is a shrinkable tube type cable holder used for fixing and holding the cable, The end of the hollow plastic core is inserted or fitted into the inner surface of the end of the hollow fixture, and a plurality of notches are provided in the connecting portion of the hollow fixture with the hollow plastic core. A retractable tube type cable holder.