JP3220439B2 - Cable end box support bracket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable terminal box support for fixing an outdoor terminal box of a high-voltage CVT cable.

[0002]

2. Description of the Related Art When an outdoor termination box of a high-voltage CVT cable is attached to a pole of a utility pole, one cable termination box connected to one CVT cable is fixed using one set of attachment fittings. Normally, since three phases are used, the same mounting operation must be repeated three times using three sets of the same metal fittings, and the mounting operation requires time.

FIG. 3 is a view showing a conventional cable terminal box support bracket. In the figure, (4) is a U-shaped metal fixture fixed to the pole of the telephone pole. (11) is a brass plate, (12) is a brass clamp, (13) is a brass plate (11) and a brass clamp (1
This is a rubber bushing that also serves as a cushion disposed between 2).

The U-shaped metal member (4), the brass plate (11) and the brass clamp (12) have mounting holes, and are fixed by two sets of bolts and nuts.

When fixing the cable termination box, the CVT cable located immediately below the cable termination box is clamped between the brass clamp (12) and the rubber bushing (13), and the bolt is tightened and fixed. Brass plate (11) and rubber bushing
(13) may be temporarily fixed in advance with a double-sided tape or the like, but is usually inserted between the CVT cable and the brass plate (11) and fastened and fixed immediately before bolting.

In order to attach three phases of CVT cables, three sets of the above-mentioned fixing brackets are required. Therefore, three brass plates, three brass clamps, three rubber bushings, six U-shaped hardware, and six U-shaped hardware mounting bolts・ A total of 21 parts, 6 sets of nuts, are required.

When the number of parts is large, not only the cost of the parts increases, but also the work becomes complicated and the time required for the work becomes long. In particular, when an unskilled worker performs work, the work time is significantly longer than that of a skilled worker, and the work efficiency is poor.

Further, when the diameter of the CVT cable is different, a brass clamp and a rubber bushing corresponding to the size must be prepared, so that the number of types of parts increases.
The work becomes even more complicated.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cable terminal box support fitting which can mount the cable terminal box in a short time, has a small number of parts, and has a low component cost.

[0010]

According to the first aspect of the present invention, there is provided a cable terminal box support fitting, comprising two U-shaped fittings (4) attachable to an arm (21) of a utility pole (20); Metal fittings (1) that can be fixed to the U-shaped metal (4), a metal fastener (3a)
(3b) is provided with a holding member (2) that can be fixed to the receiving member (1), the holding member (2) has three curved or bent cable support portions (2a), and the receiving member (1 ) And each cable support
With the cable (22) connected to the cable termination box (23) disposed between the cable fastener (3a) and (3b), the cable (22) is tightened. ) receiving brackets (1) and the cable supporting portion (2a) and I and it is possible to configure to support collectively three cable termination box by holding (23) by a
One of the receiving bracket (1) and the holding bracket (2) is made of iron.
And the other is made of stainless steel .

According to this, the three cable termination boxes can be fixed collectively by one set of support fittings. Therefore, when three phases are mounted, the number of required components is small, and the operation can be performed easily and in a short time. It becomes possible. Also, by adjusting the degree of tightening of the metal fastener, even cables having different diameters can be fixed using the same support metal.

Further, either one of receiving brackets which constitute the cable termination support bracket (1) or retainer member (2) is made of iron,
Since the other is made of stainless steel , all parts are made of iron
Heat generation due to eddy current can be reduced compared to the case
When all parts are made of brass or stainless steel
It can be manufactured at lower cost .

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments.

[Embodiment] FIG. 1 is a plan view showing a cable terminal box supporting metal fitting of the present invention, and FIG. 2 is a diagram illustrating a use state of the cable terminal box supporting metal of the present invention.

In the figure, (20) is a utility pole, (21) is an arm of the utility pole (20), (22) is a CVT cable, and (23) is a cable termination box.

(4) is a U-shaped metal fitting attached to the arm (20), and the same one as conventionally used can be used. (1) is a stainless steel fitting.

(2) is an iron holding metal fitting. The holding bracket (2) is provided with three cable support portions (2a). The cable support portion (2a) is formed by bending or bending a predetermined portion of the holding member (2). In the present embodiment, the cable support portion (2a) is formed by a bent portion having a protruding tip angle of about 90 degrees.
a) was formed.

Here, the reason why the receiving member (1) is made of stainless steel and the holding member (2) is made of iron is that if all the parts are made of iron, heat is easily generated by eddy current, and all the parts are made of brass or If stainless steel is used, the price of the bracket is likely to be expensive. Therefore, contrary to this embodiment,
(1) may be made of iron, and the holding bracket (2) may be made of stainless steel.

(3a) is a bolt, (3b) is a nut, and both constitute a fastener. Bolt (3a) is metal fitting (1)
And it can penetrate through the bolt hole provided in the holding metal fitting (2). The bolt hole of the holding member (2) is provided at a substantially central position between the cable support portions (2a).

When mounting, first, the U-shaped metal
(4) The two are locked to the arm (21), and both ends (1a) of the metal fitting (1) are fixed to each U-shaped metal piece (4) using bolts or the like. As a result, the metal fitting (1) is fixed to the U-shaped metal (4), and the U-shaped metal (4) is tightened and fixed to a predetermined position of the arm (21).

Next, a cable termination box for the CVD cable (22)
At the specified location near the connection part connected to (23),
(1) and the holding bracket (2) are arranged so as to be sandwiched between the cable support parts (2a), and the holding bracket (2) is received by two sets of bolts (3a) and nuts (3b) as fasteners. Fix to the bracket (1).

Incidentally, (2b) is an end of the holding bracket (2),
It has a shape bent toward the receiving bracket (1) so as not to interfere with bolts or the like for fixing the receiving bracket (1).

As the bolts (3a) and nuts (3b) are tightened to reduce the distance between the holding member (2) and the receiving member (1), each CVD cable (22) becomes a cable supporting portion (2a). And the bracket (1) are clamped at a total of three points, and the support is completed. At this time, since there are three cable support portions (2a) of the holding metal (2), three CVD cables (22) can be fixed at the same time.

Since the fixed interval is the interval between the cable support portions (2a), the fixed interval is always constant even if a low-skilled worker works without measuring the interval at the work site on the pole. Can be kept.

Looking at the number of parts required to fix the cable termination box for three phases, one receiving bracket, one holding bracket, one bracket fastener (bolt / nut), two sets, U-shaped metal fittings, and two U-shaped hardware There are a total of eight parts, two sets of bolts and nuts for mounting the mold hardware, and the number of parts is significantly smaller than the conventional 21 parts. As a result, the cost of parts could be reduced to half or less.

Further, since three phases can be collectively fixed with a small number of parts, the work is simpler and less troublesome than in the prior art.

Further, according to the present invention, even when the diameter of the CVT cable (22) is different, the same metal fitting can be used. That is, as shown in FIG. 1, both the thick CVT cable (22a) and the thin CVT cable (22b) can be fixed by adjusting the degree of tightening and changing the distance between the receiving bracket (1) and the holding bracket (2). Therefore, there is no need to prepare another size component as in the related art. The position indicated by the two-dot chain line in the figure is the position of the holding bracket (2) when the thin CVT cable (22b) is fixed.

Next, in order to verify the operability when the present invention was used, five workers having different levels of skill were required to perform the work of mounting the cable termination box for three phases. For comparison, work was performed on both the product of the present invention and the conventional product.

Note that the worker A is a new worker having the lowest skill level, the skill level increases in the order of B, C and D, and the worker E is the most skilled veteran worker. Table 1 shows the time required for each worker.

[0031]

[Table 1]

As is clear from the table, all the workers could use the product of the present invention in a short time on average about 1/3 compared with the case of using the conventional product. It should be noted that even the new worker A having the lowest working ability can complete the work in a shorter time by using the product of the present invention than the experienced worker E using the conventional product.

Therefore, in addition to reducing the cost of parts,
The working cost can be reduced by shortening the working time.

[0034]

As described above, according to the present invention, it is possible to provide a cable terminal box support fitting which can efficiently mount a cable terminal box in a short time, and has a small number of parts and a small part cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing a cable terminal box support fitting of the present invention.

FIG. 2 is a view for explaining a use state of a cable terminal box support bracket of the present invention.

FIG. 3 is a view showing a conventional cable terminal box support bracket.

[Explanation of symbols]

 (1) Bracket (2) Holding bracket (2a) Cable support (3a) Bolt (3b) Nut (4) U-shaped hardware (20) Utility pole (21) Arm (22) CVT cable (23) Cable termination box

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-255112 (JP, A) JP-A-9-65530 (JP, A) JP-A-9-74635 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H02G 7/00 H02B 5/02

Claims (1)

(57) [Claims] 1. A U-shaped metal fitting that can be attached to an arm of a telephone pole, a metal fitting that can fix both ends to the U-shaped metal, and a holding metal that can be fixed to the metal fitting by a metal fastener. The holding fitting has three curved or bent cable support portions, and the clamp connected to the cable termination box is arranged between the receiving fitting and each of the cable support portions. by tightening the urging member, the cable will be configured to be capable to support collectively sandwiched by three cable termination box by a pivot bracket and the cable supporting part, either receiving brackets or retainer member One is made of iron, the other is
Is a cable end box support fitting made of stainless steel .