JPS6118048B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spring type clamp used for connecting and branching busbars in power generation and substations. This clamp uses a spring force to hold the wire between the main body and the wire holder, but its assembly is a rather difficult process, as will be described later. In addition, since this assembly is performed at high places such as on top of steel towers, there has been a strong desire for improvements from workers for some time. The present invention aims to meet this demand.

Examples will be described with reference to the drawings. In Fig. 1, the main body 1 consists of an electric wire support part 1a and a branch part 1b, the support part 1a has an arcuate part corresponding to the electric wire W, and the branch part 1b allows a branch wire B to be inserted and crimped. ing. The housing 2 has a U-shaped cross section and can be inserted into and engaged with the supporting portion 1a of the main body at both leg ends like the lid of a chopstick box. A spring 3 and a spring retainer 4 are housed in the housing 2. The bolt 5 freely passes through a hole formed in the spring holder 4 and the bottom of the housing, and the spring holder 4 can be lowered by an attached nut 6. A screw hole is bored in the head of the bolt 5, and a screw 7 is screwed into the hole. The wire holder 8 has a lower surface in contact with the spring holder 4, and an upper surface corresponding to the support portion 1a, which is formed into an arc shape so as to be able to hold the wire. Further, the wire holder 8 is inserted into the screw 7 with an appropriate gap, and is locked by the head of the screw 7 so that it can be moved freely, that is, swingable. FIG. 2 is a side view of the present invention.
A case is illustrated in which three sets of a spring 3, a spring holder 4, a wire holder 8, and a bolt 5 are housed in a common housing.

The present invention is configured as described above. First, the spring and spring holder are stored in the housing, and the bolt 5 is passed through from above. Next, the wire holder is placed on the spring holder, and the screw 7 locks the wire holder in a movable manner to the bolt head. Then, tighten the nut 6 and pull the wire holder into the housing to a predetermined position.
The above will be done on the ground. The worker carries this and the main body to a high place, and first crimps the branch line B to the branch part. Next, the wire support portion 1a is applied to the wire W, and the housing is inserted. As mentioned above, since the wire holder is in a floating state without receiving spring pressure,
Even if the electric wire W has some bends, it adapts well to the bends and can be easily inserted. When the nut 6 is loosened, the spring holder is integrated with the wire holder and presses the wire, and the screw 7 is free. FIG. 1 shows the situation at this time. Since the lower end of the bolt 5 may cause a corona phenomenon, the nut 6 is removed and replaced with an anti-corrosion nut 9 (FIG. 2) that has no corners, and the construction is completed.
As can be seen from the above, the screw 7 is merely used to prevent the wire holder 8 from falling off, and does not need to be strong.

There is a known clamp whose main body consists of only a wire support part and which simultaneously presses the wires W and branch wires B arranged in parallel through the core 12. However, as shown in FIG. This structure can also be used as is.

As having the same purpose as the present invention,
No. 23334 is publicly known. Then, the spring holder and wire holder of the present invention are integrated into a saddle, and the housing is divided into a plurality of units in the longitudinal direction. However, having to insert the unit multiple times is not desirable due to the nature of work at heights. Furthermore, it cannot be said that each insertion is necessarily easy. In contrast, in the present invention, the wire holder is a single unit and can be swung.
Not only can it be easily inserted into a long housing, but it also presses into contact with the wire in a comfortable position that is familiar to the wire. Second
In the above-mentioned known example, the saddle must be made of steel in order to withstand the strong spring pressure, but steel saddles cause dissimilar metal electrolytic corrosion when they come into contact with aluminum electric wires.
Damaged in a short period of time. In contrast, in the present invention, the saddle is separated into the wire holder and the spring holder, so
Electrolytic corrosion can be prevented by using aluminum for the former and copper for the latter. Thirdly, in the present invention, the number of parts increases due to the separation of the wire holder and the spring holder, but since they are all integrated in a factory, they do not interfere with high-place field work. The above are the features of the present invention.

FIG. 4 shows another embodiment. The bolt 10 freely passes upward through the housing bottom and the spring holder 4, and is threaded into a nut 6 fixed to the spring holder. The upper end of the bolt 10 is formed into a bifurcated portion 10a, which is bent after being inserted into the wire holder 11 so that the wire holder can be swingably locked. The effect is the same as in the previous example.

[Brief explanation of the drawing]

FIG. 1 is a front view of the present invention, FIG. 2 is a side view of the same,
3 and 4 are front views of other embodiments. 1-main body, 1a-wire support section, 1b-branch section,
2-Housing, 3-Spring, 4-Spring holder, 5-
Bolt, 6-nut, 7-screw, 8-wire holder,
9 - Anti-corrosion nut, 10 - Volt, 10a - Bifurcated part, 11 - Wire holder, 12 - Core, W - Electric wire, B
- Branch line.

Claims (1)

[Scope of Claims] 1. A main body having a wire support part, a housing that can be locked to the main body, a spring stored in the housing, a spring holder that is also stored in the housing and that can press the spring, and a spring holder that can press the spring via the spring. A spring-type clamp consisting of a bolt that freely passes through both the housing bottom and the housing bottom so that they can be tightened, and an electric wire holder that is movably secured to the top of the bolt. 2. A bolt inserted downward into the spring holder and the bottom of the housing, a nut that screws onto the bolt so that both can be tightened, and a screw that is inserted into the bolt head and locks the wire holder in a swingable manner. A spring-type clamp according to claim 1 using. 3. A bolt inserted upward into the spring holder and the bottom of the housing, a nut fixed to the spring holder and screwed into this bolt, and a bifurcated part provided at the upper end of the bolt that locks the wire holder in a swingable manner by bending. A spring-type clamp according to claim 1, which uses a spring-type clamp.