JPH039695B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cable connection method, and more specifically, a cable connection method that does not require a dedicated cable connection box.
The present invention relates to a method for easily connecting cables in a cardboard box for packaging connection processing materials.

[Prior art] To connect power transmission cables, the conductive parts at the ends of two cables are connected, a heat-shrinkable tube is placed over the outside of the connected part, and the heat-shrinkable tube is heated. By shrinking it tightly covers the connection.

However, if this heat-shrinkable tube is not heated evenly around the tube, a shrinkage ram will form, wrinkles will form, and a tight seal will not be obtained.

Therefore, this heating is usually performed inside the box using hot air.

FIG. 4 is a diagram showing a conventional cable connection method, in which two cables 4 and 4' to be connected are inserted and connected from both sides of a dedicated heat-insulating tube 2, and then,
A heat-shrinkable tube (not shown in FIG. 4, see FIG. 3) is placed over the wire connection. The heat insulating cylinder 2 has an exhaust hole 3 formed on the circumferential surface near both ends and an upper hole a on the center circumferential surface, and a dryer 1 is inserted into the upper hole a.
Insert and blow air.

As a result, the heat shrink tube shrinks and covers the cable connection.

[Problems to be solved by the invention] As mentioned above, heat insulating tubes are used to connect cables, but since the size of the heat insulating tubes varies depending on the size of the cable, a large number of heat insulating tubes must be constantly connected. I needed it to prepare.

In addition, since heat insulating tubes are not available at outdoor construction sites, it is necessary to use an industrial dryer directly close to the heat shrink tube to heat it, but this results in significant heat dissipation, extremely inefficiency, and uneven shrinkage. This resulted in the disadvantage that the tube could not be tightly covered.

The present invention was obtained as a result of studies to find a simple method for connecting cables at such outdoor construction sites.

Therefore, an object of the present invention is to provide a cable connection method that allows cables to be easily and reliably connected at an appropriate location without having to prepare a heat insulating cylinder exclusively for cable connection.

[Means for determining the problem] In order to achieve the above object, the present invention forms through holes on both sides in the longitudinal direction of a cardboard box for packaging connection treatment materials, and provides a hole in the center of the top lid to form a connection material. 2
Insert the main cable into this cardboard box, connect it, cover the connection part with the heat-shrinkable tube, and shrink the heat-shrinkable tube by inserting a hair dryer through the hole in the top cover and blowing hot air. It is characterized by:

[Example] The present invention will be specifically described below with reference to the drawings.

1 to 3 are diagrams for explaining the method of the present invention.

First, FIG. 1 is a perspective view of the cardboard box in which the connection processing material was packed, and V-shaped cuts are made in both longitudinal sides A and A' of the cardboard box 5.
Through holes 7, 7' are formed. Next, a U-shaped cut is made in the center of the upper lid B to form a hole 8.

Figure 2 shows the two cables 4, 4 to be connected inserted into the cardboard box 5 along the through holes 7, 7', and the industrial dryer 1 inserted into the upper hole 8. .

FIG. 3 is a diagram showing the situation inside the cardboard box 5.
Hot air 9 coming out of the industrial dryer 1 is discharged from the through holes 7, 7' along the arrows.

A heat-shrinkable tube 6 is placed over the connecting portion of the cables 4, 4', and is shrunk by hot air 9 to tightly cover the connecting portion of the cables 4, 4'.

[Example] In order to connect a cable with an outer diameter of 3 cm, the cable was removed from the cardboard box in which the connection treatment material was packed, and a notch was provided in the cardboard box as shown in FIG.

Next, cut the cable, connect the conductive wire at the cut end, cover the connection with a heat-shrinkable tube with a length of 40 cm and a diameter of 8 cm, and insert it along the through hole in the cardboard, as shown in Figure 2. From the top hole as shown
A 1000W industrial dryer was inserted to blow hot air.

When the cardboard box was opened 4 minutes after the start of hot air blowing, the heat-shrinkable tube had shrunk completely and uniformly, and tightly covered the cable connection.

The shrinkage speed and uniformity of shrinkage are almost the same when a dedicated heat-insulating cylinder is used.

[Effect of the invention] The present invention exhibits the following excellent effects.

(1) Since the cardboard box in which the connection treatment material was packed can be used, cables can be easily connected even in places where a dedicated heat insulation tube is not available, such as at an outdoor construction site.

(2) Dedicated insulation tubes vary greatly depending on the cable size, and it is necessary to prepare a large number of them. However, with the present invention, by using a cardboard box containing the connection processing material, a box of the optimal size is always available. can.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams for explaining the method of the present invention, in which Figure 1 is a perspective view of a cardboard box, Figure 2 is a perspective view of a heat insulation box, and Figure 3 is a sectional view of the heat insulation box. , FIG. 4 is a perspective view of a conventional heat retaining cylinder. 1... Hair dryer, 2... Heat insulation tube, 4... Cable, 5... Cardboard box, 6... Heat shrinkable tube.

Claims (1)

[Claims] 1. A through hole is formed on both longitudinal sides of a cardboard box for packaging connection treatment materials, a hole is provided in the center of the top lid, and the two cables to be connected are inserted into this cardboard box and connected. A method for connecting a cable, comprising: covering the cable with a heat-shrinkable tube, and inserting a hair dryer through a hole in the top cover to blow hot air to shrink the heat-shrinkable tube.