JPH0133379Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mooring device for a long insulated trolley.

The long insulated trolley was developed as a contact moving electric wire that eliminates the risk of electric shock that has been a problem with the conventionally used bare trolley wire, and has the advantage of being able to be installed in a long length with a single wire. .

FIG. 1 shows a long insulating trolley proposed by the present applicant, in which a metal strip 2 such as copper tape is placed over the circumference of a tension member 1 made of stranded steel wire, etc.
An insulating cover 3 having a substantially U-shaped cross section is placed on top of the insulating cover 3 so that a large tension is applied by the tensile strength of the tension member 1, and a current collector is brought into contact with the metal strip through the opening of the insulating cover. It is used for current collection.

Since this long insulated trolley is installed in a single long strip with relatively long support intervals, the slackness of the trolley between support points must be kept within a certain limit, which will hinder the contact running of the collector. Therefore, the trolley is tightened at one or both ends, thereby applying a predetermined tension to the entire length of the long insulating trolley.

Conventionally, a restraining device using a coil spring has been proposed to apply tension to a long insulated trolley. FIG. 2 shows a long insulated trolley retaining device previously proposed by the present applicant, in which a retaining metal fitting 40 is attached to the exposed end of the tension member by cutting off the insulating cover and metal strip at the end of the insulating trolley. A retaining bolt 70 connected to this metal fitting 40 via an insulator 50 is passed through the retaining bracket 60, a coil spring 80 is inserted through the bolt 70, and the coil spring 80 is connected to the retaining bracket 60. It is interposed between a nut 90 screwed into the bolt 70 and the retaining bracket 60, and the amount of compression applied to the coil spring 80 is adjusted by the degree of screw insertion of the nut 90, and a predetermined amount of compression is applied to the long insulated trolley wire A. I try to give it a certain amount of tension.

If thermal expansion and contraction occurs in the long insulating trolley, the expansion and contraction of the coil spring 80 absorbs the thermal expansion and contraction.

However, in this device, the distance from the end treatment part of the insulating trolley to the tip of the retaining bolt 70 is large, and that part becomes a so-called dead space where current cannot be collected, narrowing the effective current collecting area. Such problems are caused by 20~
This problem became noticeable on routes around 30m long, and a solution was desired.

Conventionally, in order to solve such problems, a device has been proposed in which a restraining component is not provided on an extension of the terminal of an insulated trolley, but is simply restrained.

Figure 3 shows a simple anchoring device proposed by the applicant, in which 100 is an anchor clamp 1 attached to the back of the insulating trolley on the opposite side from the opening of the insulating cover.
00 is attached and fixed with a rigid pin, while a fixing metal fitting 110 is attached to the retaining bracket 60 with a bolt/nut, a nut 130 is welded to the metal fitting 110 at the portion where a through hole is formed, and an adjustment bolt is attached to the nut 130. 120 is screwed in. The tip of the screwed adjustment bolt 120 is in contact with the anchor clamp 100.

Note that the fixing fitting 110 is the anchor clamp 10.
0 with bolts and nuts, etc., so that it is prevented from rotating about the bolt and nut attachment portion of the retaining bracket 60.

Further, the fixing fitting 110 is the anchor clamp 10
The through hole of the bolt that is passed through for attachment to the anchor clamp 100 is made into an elongated hole so that it can be slid with respect to the anchor clamp 100.

In this case, by threading the adjustment bolt 120 and moving it forward, the anchor clamp 100 can be adjusted.
The insulating trolley is moved by pushing the trolley to apply tension to it.

According to this device, insulated trolleys can be laid along the entire length of the route, and the dead space required is only a small amount for installing the terminal protection cap, and the device itself has a simple structure and can be significantly downsized.

However, adjusting the movement of the anchor clamp by screwing in bolts can only be done while visually checking the degree of slack in the insulating trolley, which poses the problem of applying excessive tension to the insulating trolley, making adjustment work difficult. . Furthermore, since the insulated trolley does not have a function to absorb thermal expansion and contraction, there are restrictions on the length of the insulated trolley that can be installed.

In view of the various problems of the prior art described above, the present invention aims to provide a long insulated trolley retaining device of this type that can set an appropriate tension without forming a large dead space and also contributes to miniaturization. It is something.

To achieve this purpose, the long insulated trolley retaining device of the present invention has a fixing fitting 11 attached to a retaining bracket 6, as shown in FIG.
, an anchor clamp 9 which is attached and fixed to the insulating trolley and is slidable on the fixing metal fitting 11 by inserting its own bolt into the elongated hole of the fixing metal fitting 11; The adjustment bolt 12 is in contact with the anchor clamp 9, the adjustment nut 14 is screwed into the adjustment bolt 12, and the adjustment nut 14 is inserted into the adjustment bolt 12 so that the adjacent adjustment bolts 12 overlap in opposite directions. A plurality of Belleville washers 15 are provided in series between the nut 14 and the fixing metal fitting 11.

Belleville washer 15 used as above
A relatively large deformation pressure can be obtained with a small volume, and stable force transmission is possible by stacking adjacent pieces in opposite directions.

A more detailed explanation will be given below with reference to FIGS. 4 and 5.

The fixing fitting 11 is attached to the retaining bracket 6 with a bolt/nut or the like, and one end thereof is bent into a substantially L-shape and a through hole is bored therein. The adjustment bolt 12 is provided so that its tip abuts on the anchor clamp 9 fixedly attached to the insulating trolley through its through hole.

The fixing metal fitting 11 extends above the anchor clamp 9, and by inserting a bolt protruding from the anchor clamp 9 and tightening the nut, the adjustment bolt 2 is adjusted to maintain a predetermined positional relationship with the anchor clamp 9.
The anchor clamp 9 of No. 1 is securely brought into contact with the anchor clamp 9. The insertion hole for the bolt protruding from the anchor clamp 9 of the fixture 11 is an elongated hole, so that the two can slide against each other to adjust their positional relationship.

Adjustment nut 14 screwed into adjustment bolt 12
As shown in Figure 5, weld a square washer and
By locking the washer to the surface of the fixture 11, the washer moves about the adjustment bolt 12 without rotating itself.

A plurality of Belleville washers 15 are inserted into the adjustment bolt 12 by stacking them in opposite directions so that adjacent ones are top and bottom, and one end of each of these washers is attached to the adjustment nut 14 (washer). and the other end is the fixing metal fitting 1.
1 , the nut 14 and the fixing metal fitting 11 are arranged in a continuous manner.

According to the detention device configured in this way,
By simply screwing in and rotating the adjustment bolt 12, the anchor clamp 9 is pressed and a predetermined tension is applied to the insulating trolley. It is possible to deform and compress the Belleville washers 15 that are continuously installed by moving backward, and to confirm that an appropriate tension is applied due to the deformation and compression.

If the insulating trolley expands or contracts due to ambient temperature changes or electrical heat, the Belleville washers 15 can deform in the overlapping direction to absorb the expansion and contraction and maintain appropriate tension on the insulated trolley. can.

As explained above, according to the long insulated trolley mooring device of the present invention, the area where current cannot be collected, that is, the dead space, is almost eliminated, and the deformation and compression of a plurality of Belleville washers, in which adjacent comrades are stacked in opposite directions, is Therefore, an appropriately set tension can be applied to the insulating trolley.

In addition, according to the anchorage device of the present invention, although the attachment point is located behind the insulated trolley, that is, on the side close to the construction materials, the bolt inserted through the fixing fitting attached to the bracket is brought into contact with the anchor clamp. By configuring it like this, it can be made very compact, and while maintaining its compact structure, a plurality of small-volume Belleville washers can be connected between the nut screwed into the bolt and the fixing metal fitting. Because it is installed in a fixed position, the length can be reduced to less than half compared to the long length of conventionally used coil springs. It can be easily installed at a desired location without having to install it, and can be advantageously used in modern power supply areas where installation space is increasingly limited, and its practical benefits are enormous.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view showing an example of a long insulated trolley, FIGS. 2 and 3 are explanatory views showing two embodiments of a conventional long insulated trolley retaining device, and FIG. FIG. 5 is an explanatory diagram showing one embodiment of the long insulated trolley retaining device of the present invention, and is an explanatory diagram of the parts used in the device. A...Insulated trolley, 9...Anchor clamp, 11...Fixing metal fittings, 12...Adjustment bolt, 1
4...Adjustment nut, 15...Belleville washers.

Claims (1)

[Scope of utility model registration request] A fixing metal fitting 11 attached to the anchoring bracket 6, and an anchor clamp 9 which is attached and fixed to the insulating trolley and is slidable into the fixing metal fitting by inserting its own bolt into the elongated hole of the fixing metal fitting 11. , an adjustment bolt 12 that is inserted through the fixing fitting 11 and has its tip abutted against the anchor clamp 9, an adjustment nut 14 that is screwed into this adjustment bolt 12, and the adjustment bolt 12 that is adjacent to the adjustment bolt 12 is opposite. A long insulated trolley retaining device comprising a plurality of Belleville washers 15 which are arranged in series between the adjustment nut 14 and the fixing metal fittings 11 in a state of being inserted so as to overlap in the direction.