JPH0644276Y2 - Temporary oil stop device for OF cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a temporary oil stop device for an OF cable.

[Technical background of the invention] Conventionally, as a temporary oil stop device for a connection box for a single-core OF cable, a small diameter portion and a large diameter portion are provided at the connection end portion of the OF cable where the cable core and the corrugated cable are exposed by exposing the cable core. Fit the stepped lead tube consisting of the diameter part so that the small diameter part is located on the cable core and the large diameter part is located at the end of the corrugated cable sheath, and between the stepped lead tube ends and the cable core and the corrugated cable sheath. It is known that an oil-tight seal is made by inserting packing or the like into.

In order to maintain sufficient oil-tightness and to improve hydraulic resistance, such a conventional temporary oil stop device is tightly bound to the packing and the like from the stepped lead tube so that the cable core and corrugated cable sheath are completely fixed in place. The structure is fixed to.

[Problems of the background art] However, in the conventional OF oil temporary oil stop device fixed to the connecting end portion of such an OF cable, the packing interposed between the corrugated cable sheath and the stepped lead tube is an integral part. Since it is formed by the above-mentioned method, there is a problem that the packing must be individually formed each time according to the size and shape of the corrugated cable sheath, and consequently, a large number of molds for forming the packing must be prepared. was there.

[Object of the Invention] The present invention has been made in order to solve such a conventional problem, and an object of the present invention is to provide a temporary oil stop device for an OF cable capable of reducing the types of annular packing and mold. .

[Summary of the Invention] That is, in the temporary oil stop device for an OF cable of the present invention, the packing interposed between the corrugated cable sheath and the metal pipe has the trough of the corrugated cable sheath on the outer circumference of the corrugated cable sheath. The ring-shaped packing and the ring-shaped packing made of a rubber string or a plastic string attached along the portion, and the ring-shaped packing for covering the outer circumference of the corrugated cable sheath filled with the valley-filled packing. This makes it possible to reduce the number of molds.

[Embodiment of the Invention] The embodiment of the present invention will be described below in detail with reference to the drawings.

The drawing is a partially cutaway side view showing an embodiment of the present invention.

In the figure, the connecting end portion 3 of the single-core OF cable in which the cable core 1 and the corrugated cable sheath 2 such as an aluminum cover are exposed by stripping off is connected to the small diameter portion 4a from the cable core 1 to the corrugated cable sheath 2. A metal tube 4 including a large diameter portion 4b and a large diameter portion 4b is fitted so that the small diameter portion 4a is arranged on the cable core 1 and the large diameter portion 4b is arranged on the outer circumference of the corrugated cable sheath end portion.

A single annular packing 5 is interposed between the small-diameter portion 4a of the metal tube 4 and the cable core 1. The packing 5 is formed by pressing the metal tube 4 from the outside. It is oil-tightly fixed on the core 1.

A packing 9 composed of a valley filling packing 7 and an annular packing 8 is interposed between the large diameter portion 4b of the metal tube 4 and the corrugated cable sheath 2.
Is fixed on the corrugated cable sheath 2 in an oil-tight manner by pressing the metal tube 4 from the outside.

In addition, as a method of pressing the metal pipe 4 described above, a method of utilizing the winding force of the bind wires 6 and 10 wound around the outer periphery of the metal pipe 4 or a hose band, or a compression device (not shown) is used. A method of compressing itself from the outside is known.

The valley filling packing 7 is formed by attaching a round or semi-cylindrical rubber cord to the outer circumference of the valley portion of the corrugated cable sheath 2 along the valley portion of the corrugated cable sheath 2. Thereby, the outer surface of the corrugated cable sheath 2 is formed substantially smoothly.

When using a semi-cylindrical rubber cord, it is desirable to attach the circular cord surface of the rubber cord toward the trough side of the corrugated cable sheath.

The annular packing 8 is composed of a cylindrical rubber packing or the like having an inner diameter substantially the same as or slightly smaller than the outer diameter of the corrugated cable sheath 2, and the corrugated cable sheath filled with the above-mentioned valley filling packing. It is fitted around the outer circumference of 2.

By the way, as described above, in the case of filling the valley with the rubber cord, the outer surface of the corrugated cable sheath 2 is formed in a state of being somewhat uneven. Therefore, when the annular packing 8 made of rubber packing is arranged on the outer circumference of the corrugated cable sheath 2 having such irregularities, and the binding wire 10 provided on the outer circumference of the metal tube 4 is tightly bound to the inner circumference of the annular packing 8. The corrugated cable sheath 2 is deformed in a biting state corresponding to the uneven state of the outer surface. As a result, the annular packing 8 is oil-tightly fixed to the outer circumference of the corrugated cable sheath 2, so that oil leakage can be effectively prevented.

In addition, in the above-mentioned embodiment, the case where a rubber cord is used as the valley filling packing 7 is described, but the present invention is not limited to this, and a plastic cord such as a vinyl cord may be used.

[Effects of the Invention] As described above, according to the present invention, if one kind of rubber cord or the like is prepared in advance and this is attached along the valley portion of the corrugated cable sheath, the wave after the attachment is Since the outer surface of the attached cable sheath can be finished to be substantially smooth, an annular packing can be used as the packing to be wrapped around this outer circumference. Therefore, in the present invention, since it is sufficient to have a mold for forming an annular packing, it is not necessary to prepare many kinds of molds, and there is an advantage that the annular packing can be manufactured at a short delivery time and at a low cost. is there.

[Brief description of drawings]

1 is a partially cutaway side view showing an embodiment of a temporary oil stop device for an OF cable according to the present invention. 1 ... Cable core 2 ... Waved cable sheath 3 ... OF cable connection end 4 ... Metal tube 5, 9 ... Packing 7 ... Valley filling packing

Claims (1)

[Scope of utility model registration request] 1. A metal pipe is fitted over the connecting end portion of an OF cable in which the cable core and the corrugated cable sheath are exposed by stripping off, and the metal pipe is fitted over the cable core and the corrugated cable sheath. The packing is interposed between the cable core and the corrugated cable sheath, and the metal pipe is pressed from the outside to fix the packing on the cable core and the corrugated cable sheath, respectively.
In a cable temporary oil stopper, a rubber string in which a packing interposed between the corrugated cable sheath and the metal tube is attached to the outer circumference of the trough of the corrugated cable sheath along the trough of the corrugated cable sheath. Alternatively, the provisional oil stop device for an OF cable is configured by a valley filling packing made of a plastic cord and an annular packing enclosing the outer circumference of the corrugated cable sheath filled with the valley filling packing.