Method of inserting wire in rubber sleeving and rubber sleeving expander

Abstract

Provided is a good cable threading method to a grommet, which can improve the threading work efficiency at the time of threading a cable into a long grommet, and to provide a grommet expander. The grommet expander 10 is equipped with three pieces of first to third flexible long members 11, 12, and 13 for diameter expansion, which are to be passed into the hole of the long grommet, drive means 21 and 31, which displace these second and third flexible long members 12 and 13 for diameter expansion with both their ends supported into far positions, a frame 18, and a controller 20. The grommet is brought up near the center while expanding it to shrink the longitudinal dimensions by displacing these first to third flexible long members 11, 12, and 13 for diameter expansion into mutually far positions and flexing the centers of the first to third flexible long members 11, 12, and 13 for diameter expansion with both their ends supported.

Description

technical field [0001] The invention relates to a method for inserting electric wires into a long rubber sleeve for inserting metal wires and other electric wires into a long rubber sleeve and a rubber sleeve diameter expanding machine. Background technique [0002] For example, when inserting wires such as metal wires into openings on panels of automobile bodies and junction boxes, etc., in order to prevent the metal wires from contacting the openings and preventing water from infiltrating through the gaps, the following methods are usually used: Install the rubber sleeve on the metal wire in advance, and install the rubber sleeve into the opening formed on the installed body. First, it can be used as a supporting member for the metal wire, and second, it can also seal the gap on the outer ring of the wire. [0003] In the past, this kind of rubber sleeve was integrally formed with soft elastic materials such as synthetic rubber. When the metal wire with the plug installed ...

AI Technical Summary

Problems solved by technology

[0008] However, when the rubber sleeve diameter expanding machine with the long rubber sleeve described in the above-mentioned patent document 2 is used to insert electric wires into the rubber sleeve G, the long rubber sleeve is only stretched in the direction of diameter expansion. In the state where the wire can be inserted, as shown in Figure 11(b), the size of the rubber sleeve G in the length direction has almost no change from that before the diameter expansion, and it is still very long.

[0009] Thereby a plug 5 is installed at the insertion end, and its own rigidity is very low simultaneously, and when the metal wire W / H that is particularly easy to bend, because the inserted head is easy to hang on the inwall of rubber sleeve, can't insert smoothly, Therefore, there is a problem that the operability of insertion is poor.

[0010] In addition, although it is conceivable for the operator to use his fingers or the like to perform the insertion operation while keeping the length in the shortened state, the rubber sleeve G is very slippery due to the release agent etc. If the shortened state is maintained, the result is that the operability is obviously low

Images