JPH0345609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a connection tool used for multi-branch connection of cables.

(Prior Art) As shown in FIG. 7, at the connection part where the cable branches into three cables 1A, 1B, and 1C, for example, a sheet of heat-shrinkable plastic or a It is necessary to cover each cable 1A, 1B and 1C closely with the outer periphery of the tube sleeve 2.

To implement this, conventionally, as shown in the figure, a U-shaped clip 101 is attached to each branch cable 1A.
and 1B, and 1B and 1C to clamp and fix this portion, and then heat-shrink the sleeve 2.

(Problems to be Solved by the Invention) The heating process for shrinking the sleeve 2 will be explained with reference to FIG. 8, which is a sectional view of the state in FIG. It reciprocates like A←B from the cable 1A side at the other end to the cable 1C side at the other end, and the back side is C in the same way.
→ It reciprocates as shown in D, and both ends move appropriately as shown in arrows E and F, and in this way the necessary heating areas are heated evenly and evenly. However, as is clear from Figure 8, the torch The reciprocation of the flame of the lamp or the like results in overheating of the centrally located cable, in this case the sleeve covering the cable 1B, which causes the heat-shrinkable plastic sleeve 2 to deteriorate.
In extreme cases, scorching and cracking may occur, impairing the sealing performance and damaging the cable's insulation coating.Conversely, due to the fear of overheating, the sleeve may not be heated sufficiently, resulting in incomplete shrinkage. This has the disadvantage that the sealing performance becomes incomplete.

(Means for Solving the Problems) This invention has been made to eliminate the above-mentioned drawbacks, and provides a heat-shrinkable sleeve for covering a multi-branch connection in which a cable branches into three or more multi-branch connections. It has a pair of parallel clip legs that are used directly to perform the multi-branch connection method in which the sleeve is held in the middle of each branch cable and then heat-shrinked, and has locking grooves on both sides. A multi-cable cable having a branch clip and a flameproof plate having a curved plate shape, an opening provided on the plate surface, and a hook portion formed at the end edge to engage with the locking groove. The present invention provides a connecting tool for connecting a branch.

(Function) Overheating is prevented because the sleeve portion corresponding to the central cable, which is prone to overheating, is covered with a flameproof plate. Since the flameproof plate has openings with an appropriate area, of course it does not get heated at all, but only the necessary and sufficient amount of heat is generated.In this way, the sleeve is heated evenly and evenly over all of the branch cables. A perfect heat shrinkage is achieved and a perfect seal is ensured.

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

First, the connecting tool of the present invention will be explained with reference to FIGS. 1 to 5.

The clip legs 31A, 31B of the branched clip, generally indicated by the reference numeral 3, extend in parallel with appropriate spacing, one end of which is integrally fixed to the knob head 30, and the other end facing outward and extending in parallel. The openings form insertion guide portions 33A and 33B that expand into a character shape.

The knob head 30 has an elliptical shape, so to speak, a pea-shape, with a constricted knob 30A in the center, and the back of each clip plate 31A, 31B on the opposing surface side has a mark clearly shown in FIG. A reinforcing rib portion 32 is formed to increase bending rigidity.

The opposing surfaces of the clip legs 31A and 31B are provided with at least one, in the illustrated example two, locking portions 4 of appropriate depth.

Further, as clearly shown in FIG. 3, a locking groove 5 and a protrusion 5A are provided on both side surfaces of the base of the rib portion 32.

A flameproof plate 6 as shown in FIG. 5 is also used. The 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 evenly distributed over the entire surface of its central portion 61. Both end edges are bent to form hook portions 62.

Next, a connection method using the connection tool of the present invention will be explained.

First, attach the connection tool described above.

This includes the knob head 30 of branch clip 3.
Holding the cable, insert it from the V-shaped insertion guide parts 33A, 33B into the middle sleeve part of each branch cable up to the base, then hook the hook part 62 of the flameproof plate 6 onto the locking groove part 5 of the branch clip 3, and insert it into the sixth cable. Shield the end of the sleeve as shown.

Although not shown, if there are four branch cables, the two branch cables in the center will of course be covered by this flameproof plate 6.

After such preparation, the entire circumference of the sleeve 2 may be heated with a flame from a torch lamp or the like by moving the flame back and forth on one side at a time. At this time, since the flameproof plate 6 is already present, the central part is heated indirectly through the flameproof plate 6, so it is not overheated and is evenly heated over the entire circumference of the sleeve. This provides excellent heat shrinkage and ensures perfect sealing of the branch connections.

(Effects of the Invention) When a connection is made using the connection tool according to the present invention, overheating is prevented and necessary and sufficient heating is achieved because the sleeve part corresponding to the cable in the central part, which is prone to overheating, is covered with a flameproof plate. In this way, the sleeve is heated evenly and evenly over the entire length of each branch cable, achieving good heat shrinkage and ensuring perfect sealing.In addition, the connecting tool according to the invention is easy to bond and non-stick. It has the advantage that it can be easily handled even by an experienced person.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 4 is an end view as seen from the knob head side. 5 is a perspective view showing the flameproof plate, FIG. 6 is a cross-sectional view showing the flameproof plate attached to explain the process of connecting using the connection tool of the present invention, and FIG. 7 is a perspective view showing the flameproof plate. 8 is a perspective view showing a branch connection portion, and FIG. 8 is a sectional view showing a conventional process. 3... Branch clip, 5... Locking groove, 6...
Flameproof board.

Claims (1)

[Claims] 1 A pair of clip legs 31A, 31 extending in parallel
A branch clip 3 having a substantially U-shape as a whole and having locking grooves 5, 5 on both sides thereof.
and a flameproof plate 6 made of a heat-resistant metal plate that is bridged between the locking grooves of one of the adjacent clip legs when the branch clips are positioned parallel to each other. Tool for connecting row branches.