JPS6399711A - Method and tool for multibranch joint of cable - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cable multi-branch connection method and a connection tool used therefor.

(Conventional Technique tff) As shown in FIG. 7, at the connection point where the cable branches into three cables IA, in, and IC, for example,
Close-fitting of connections (in order to improve flexibility, it is necessary to cover each cable LA, IP, and IC closely with a heat-shrinkable plastic sheath 1 or a tube sleeve 2 along the outer periphery of each cable. be.

To implement this, conventionally, as shown in the same figure, a U-shaped clip 101 is connected to each branch cable 18, 1B, 1B, and 1B.
It is inserted into the sleeve 2 between B and the IC, and this part is clamped and fixed, and then the sleeve 2 is heated and shrunk.

(Problems to be Solved by the Invention) The heating process for shrinking the sleeve 2 will be explained with reference to FIG. 8, which shows a cross-sectional view of the state in FIG. 7.
The flame of Hasagawa's 1-1,000 lamps is connected to the cable IA at the end.
f! ! A from II to the other end 8 (:) on the cable IC side.
・As in -13, the back side is similar to (knee 1).
), and both ends are moved appropriately as shown by arrows E and F, and in this way, the heating area is heated evenly and evenly.4 However, it is clear from Figure 8 that the As the flame of a torch lamp etc. moves back and forth,
Cable located in the center, in this case cable l13j
(g) The covering sleeve part may be overheated, resulting in the heat-shrinkable sleeve 2 being inferior, and in extreme cases, scorching or cracking may occur, impairing the sealing performance, and There is a risk of damage to the insulating limb N of the cable, and conversely, due to the fear of overheating, the sleeve may not be heated sufficiently, resulting in incomplete contraction and therefore incomplete sealing (problem 7). This invention has been made to eliminate the above-mentioned drawbacks, and it uses a heat-shrinkable material to cover the multi-branch connection where the cable branches into three or more branches. In the multi-branch connection method, in which a sleeve is held in the middle of each branch cable and then heated and shrunk, both branches of the branch cable (
The sleeve part that covers the cables in the central part except for the +11 cable is shielded and heated by a flameproof plate with an appropriate area open on the entire surface, thereby adjusting the heating heat amount of the three 1 part. The present invention provides a cable multi-branch connection method characterized by the following.

Further, this invention has one clip leg extending in parallel that is used directly to carry out this connection method, and has a branch chest 1 with connecting holes on both sides, and a curved plate shape. , a flameproof plate having an opening ( ) on the plate surface and a draw portion (11) formed at the end edge to engage with the locking Ir4 portion. A cable multi-branch connection 111 connection tool is provided.

(fl"river) Overheat 1- Overheat 1-
Since the IUj flame plate is provided with an appropriate area of 1", it will not heat up at all, but will be heated for 1-2 minutes, and in this way the sleeve will be connected to each branch. The cable is heated evenly and evenly over the entire cable to achieve good heat shrinkage and ensure a perfect seal.

(One Practical Example) An embodiment of the present invention will be described with reference to FIGS. 1 to 6.

The connecting tool of the present invention will first be described with reference to FIGS. 1 to 5.7 The clip legs 31A, 311-3 of the branching clip, generally designated by the reference numeral 3, extend in parallel with appropriate spacing;
One end thereof is integrally fixed to the knob head 30, and the other end is an insertion guide portion 33A that expands outward in a “1” shape.
, 3] 3 and is open.

The knob head 30 has an elliptical shape, so to speak, in the shape of a pea, with a constricted knob 30A in the center. A reinforcing rib portion 32 is formed 7 to increase bending rigidity.

At least one
In the illustrated example, two locking portions 4 of appropriate depth are provided.

Further, as clearly shown in FIG. 3, a locking ledge 5 and a protrusion 5B are provided on both sides of the base of the rib portion 32.

A flameproof plate 6 as shown in FIG. 5 is also used. This flameproof plate 6 is made of a heat-resistant metal plate as a whole, and has circular, square, star-shaped, or other appropriately shaped openings 63 perforated in an even distribution over the entire surface of the central part 61, and both edges are folded. The hook is bent to form a portion 62.

Next, let me explain the connection method of this invention.

First, attach the connection tool described above.

To do this, hold the branch clip 3 by its knob g'rI part 30 and insert it from the V-shaped insertion guide parts 33A, 3313 into the sleeve part in the middle of each branch cable up to the base, and then hook the flameproof plate). The section 62 is hooked onto the locking trough section 5 of the branch chest 3 to cover the end of the sleeve as shown in FIG.

Although not shown, if there are 11 branch cables,
Of course, the branch cables covered with this flameproof plate 0 will be the two trees in the center.

It is sufficient to heat the entire circumference of the sleeve 2 with such a flame of tLI・-1,000 lans at 1- by moving the flame back and forth on one side at a time.
Because of this, the central part is heated indirectly through the flameproof plate 6, so it is not overheated and is uniformly heated over the entire circumference of the sleeve, resulting in good heat shrinkage and branch connections. Complete sealing is ensured.

<Effects of the Invention> According to the present invention, overheating is prevented and necessary and sufficient heating is performed by covering the sleeve part corresponding to the cable in the central part, which is likely to be overheated, with a flame retardant plate. is heated evenly and evenly throughout each branch cable to achieve good heat shrinkage.
It has the effect of ensuring complete sealing, and (2) the connecting tool used is easy to adhere, so even non-skilled people can easily grasp it.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is an enlarged sectional view taken along the m-rn line in FIG. 1, and FIG. 4 is a view from the knob head side. FIG. 5 is a perspective view showing the flameproof plate, FIG. 6 is a cross-sectional view showing the flameproof plate installed to explain the invention in detail, and FIG. 7 is a branch connection section. The perspective view and FIG. 8 are cross-sectional views showing the conventional process. 3... Branch clip, 5... Locking clear part, O... Fireproof board agent, patent attorney Takeuchi 1 Figure 3 Figure 4 Figure 7 Figure 6 Figure 8F! I door

Claims (1)

[Claims] 1. At a multi-branch connection where a cable branches into three or more multi-strands, a heat-shrinkable sleeve is applied to cover the connection at the end of each cable, and then this sleeve is heated. A multi-branch connection method for cables in which the cable is shrunk and the sleeve portion in the vicinity of the branch connection portion is shielded by a flameproof plate (6) and heated. 2. A pair of clip legs (31A, 31B) extending in parallel
A branch clip (3) having an approximately U-shape as a whole with locking grooves (5, 5) provided on both sides, and a branch clip (3) having a curved plate shape and having an appropriate area over the entire surface of the plate. An opening (63) is provided at the end edge of the locking groove (63).
5) on which a hook portion (62) is formed.
6) A connection tool for multi-branch connection of cables, comprising: