JPS641743Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to an attachment/detachment device for a high-voltage overhead cable to a connecting body.

Traditionally, overhead power lines had three phases strung at regular intervals, but triplex type cables have been introduced in recent years to address issues such as urban overcrowding, rapid increases in electricity demand, and hindrances to extinguishing building fires. . This triplex type cable is used for connections with electrical equipment such as switches and transformers, and for intermediate connections between other lines and cables, as shown in Figures 1 and 2.
Aluminum connection body 5 of type or T type (not shown)
Use 0. This connecting body 50 has an internal cavity 51
A female plug 52 made of a conductor is provided at the end of the cable 60, and a compressed male plug 61 is inserted into the cavity 51 of the connecting body 50 and brought into contact with the female plug 52 for electrical connection. However, in order to prevent corrosion of the high-voltage overhead cable due to the infiltration of rainwater into the connecting body, the inside of the connecting body must be kept airtight or sealed, resulting in highly precise joining. Therefore, when installing a new cable, converting a cable due to a change in capacity, removing a cable, etc., it is difficult and difficult to remove and insert the cable terminal into the connecting body. The larger the diameter of the cable, the more difficult this becomes, and it is often impossible to do this manually. That is, when inserting the cable into the connection body, the cavity 51 of the connection body 50
Air enters the cable, and when the cable is inserted, there is no escape route for this air, and it requires considerable force to insert it. On the other hand, when pulling out the cable from the connecting body 50, the inside of the cavity 51 of the connecting body 50 is close to a vacuum state.
Difficult to pull out the cable. This is because if silicone grease is applied to the area, the airtightness becomes even higher when inserting and removing the cable, making the work even more difficult. Moreover, the more time passes, the more difficult it becomes to get rid of it.

This idea was made in consideration of these points, and provides a detacher that mechanically performs insertion and removal of the cable end into the connection body, thereby saving a great deal of labor. The cable can be inserted into or pulled out from the connector extremely easily without any need for it, and the bending load on the connector etc. can be minimized and the work can be done without damaging the connector.

An embodiment of this invention will be described below with reference to the drawings. 1 is an elongated rectangular cylindrical case, 2 is an L-shaped seat plate that closes one end of this case 1, and 3 is this seat plate 2.
4 is the case 1 in the vicinity of the seat plate 2.
A case fixing bolt 6 has one end pivoted on a bolt 5 extending across both side walls of the clamp base 3, the other end protrudes from a hole in the seat plate 2, and passes through the clamp base 3. A nut is screwed onto the tip of the protruding case fixing bolt 4 and fixes the connecting body clamp base 3 to the case 1 via the seat plate 2. Nuts 7 are bent portions that are rotatably suspended from both sides of the connecting body clamp base 3. The clamp arms 7 each have a convex section 7a formed on the inner edge thereof. Reference numeral 8 denotes two pairs of holes drilled symmetrically to the case fixing bolts 4 on both outside and middle sides of the connection body clamp base 3, and 9 a pair of holes that pass through the upper end of each clamp arm 7. The arm 7 is rotatably supported around the bending pin 9 which is removably inserted into the hole 8 of the arm. Reference numeral 10 denotes a tightening bolt whose one end is rotatably supported at the lower end of one clamp arm 7, and the free end of this tightening bolt 10 can be freely inserted into a locking hole 11 bored at the lower end of the other clamp arm 7. be. 12 is a tightening nut screwed onto the free end of this tightening bolt 10; 13 is the case 1;
This drive shaft 13 has one end of the bolt head 13a left on the outer surface of one side wall of the case 1, and the other end of the drive shaft 13 left on the outer surface of one side wall of the case 1.
The nut 14 is passed through both side walls of the case 1 and screwed onto the outer surface of the other side wall of the case 1. 15 is a sprocket provided on the outer periphery of each drive shaft 13 in this case 1, 16 is an annular chain extending on both sides of these sprockets 15, and 17 is this chain 1.
6 is a slide block fixed to one of case 1, 18 is a long hole bored in the longitudinal direction on both side walls of case 1, 19 is a cable clamp, and this cable clamp 19
The two upper and lower clamp pieces 19a and 19b are pivotally supported on one side via a pin 20, and the free end of a tightening bolt 21 that is pivotally supported on one side is connected to the other clamp piece 19.
It can be freely attached to and detached from a locking hole (not shown) in b, and a wing nut 22 is screwed onto the free end thereof. Reference numeral 23 denotes an attachment provided on these clamp pieces 19a, 19b, and a semicircular hole 24 is provided in the center of these attachments 23 to form a circle when they are put together. 25 is the upper clamp piece 19a
The plate overlapped at the upper end, 26 is this plate 2
These L-shaped fittings 26 are parallel to each other. 27 are the two bolts passed over the top of the L-shaped fittings 26 on both sides, and 28 are each of these bolts 2.
These collars 28,
The case 1 is slidably inserted into a gap surrounded by the L-shaped fittings 26 and the plate 25 on both sides. 29 passes through one L-shaped fitting 26, passes through the long hole 18 of the case 1, penetrates the slide block 17, and passes through the other long hole 18 to the other L-shaped fitting 26.
Two bolts pass through the metal fitting 26, 30 is a nut screwed onto the end of the bolt 29 that protrudes outward from the other L-shaped metal fitting 26, and 31 is a cap that covers the end surface of the case opposite to the seat plate 2. be.

This invention has the above structure, and the connecting body 50 has
To insert the cable 60 having a compression plug 61 at its tip, first loosen the tightening nuts 12 at the ends of the clamp arms 7 on both sides of the detacher of this invention, and remove the tightening bolt 10 from one clamp arm 7.
Remove the bending pin 9 and attach each clamp arm 7 to one of the two sets of holes 8 according to the diameter of the connecting body 50.
is moved and fixed, and the convex strips 7a on the inner edges of the clamp arms 7 on both sides are attached to the concave and convex portions 53 at the ends of the connecting body 50.
and connect the connecting body 50 with the clamp arms 7 on both sides.
While holding the uneven portion 53 of the clamp arm 7, the tightening bolt 10 of one clamp arm 7 is inserted into the locking hole 11 of the other clamp arm 7, and the tightening nut 12 is tightened from above. This allows the end of this device to connect to the connecting body 5.
0, and the case 1 is supported and projected on an extension of the connecting body 50. Then, loosen the wing nut 22 of the cable clamp 19, remove the tightening bolt 21 from the clamp piece 19b, open the clamp piece 19b by turning it around the pin 20, and open each clamp piece 1.
Remove the attachments 23 of the clamp pieces 19a, 19b, and insert the attachments 23 having semicircular holes 24 that match the diameter of the cable 60 to be inserted into the respective clamp pieces 19a, 1.
Attach to 9b.

Then, insert the cable 60 into the cavity 51 of the connection body 50 by hand into each attachment 23.
Insert the clamp pieces 19a, 19 into each semicircular hole 24 of
The free end of the tightening bolt 21 is inserted into the locking hole (not shown) at the end of the clamp piece 19b, and the wing nut 22 is tightened. As a result, the cable 60 is clamped by the cable clamp 19.
Therefore, a tool 32 such as a wrench is hung on the bolt head 13a of the drive shaft 13 near the connection body 50 of the case 1, and by turning the handle of this tool 32, the chain 16 is moved, and the slide block 17 is thereby moved into the elongated hole. The L-shaped fitting 26 and the cable clamp 19, which are integral with the slide block 17, also slide along the case 1. The cable 60 clamped by the cable clamp 19 in this manner is inserted into the inner part of the cavity 51 of the connecting body 50. At this time, the rotation of the tool 32 is changed to a linear motion to propel the end of the cable 60 and insert it into the connecting body 50, which is extremely easy, reliable and simple compared to inserting the cable 60 only by hand. The same applies when the cable 60 is pulled out.

When considering mechanical insertion and removal of the cable 60 into and out of the connecting body 50, rotational motion can be replaced with linear motion by various methods, such as a rack type, chain type, screw type, etc. However, especially in the case of the rack type, the point of effort moves with the movement and is away from the connection body, so bending loads are applied to the support frame such as a rack supported at the end of the connection body 50 and the connection body 50. There is a possibility that the cable 60 may not be inserted straight into the cavity 51 of the connection body 50.

However, in the case of this invention, the tool 3 is attached to the bolt head 13a of the case 1 near the connection body 50 as described above.
Since this is multiplied by 2 and rotated, the point of effort does not move and is close to the connecting body 50. Therefore, only a slight bending load is applied to the connecting body 50, so that the connecting body 50 is not damaged. Further, the cable 60 can be pushed straight along the case 1 and inserted straight into the cavity 51 of the connecting body 50.

Furthermore, compared to the screw type, this invention has the advantage of speeding up the work because the cable 60 is propelled by a small amount of rotation of the drive shaft 13.
Also, if the length of the handle of the tool 32 is increased,
Of course, a large force can be obtained with a small amount of effort, and a great deal of effort is not required to insert and pull out the cable 60 into the connecting body 50. In addition, in this invention, as mentioned above, the point of force is provided at a place separate from the point of action, so the frame between these points should be as strong as possible, but in the above embodiment, the case 1 is shaped like a rectangular tube. High strength.

Further, in the above embodiment, the cable 60 is held by the cable clamp 19 by the inner periphery of the semicircular hole 24 of the two upper and lower attachments 23.
Since the entire circumference of the cable 60 is clamped, the cable 60 is not damaged. Furthermore, the connecting body clamp consisting of the connecting body clamp base 3 and two clamp arms 7 of the above embodiment has a convex strip 7 on the inner peripheral edge of the clamp arm 7.
a into the uneven portion 53 of the end of the connecting body 50, and clamp the end of the connecting body 50 with the clamp arms 7 on both sides, and as shown by the dashed line in FIG. Since the outer periphery of the connector 53 is supported at at least four points, the device can be firmly and securely supported on the connecting body 50 without wobbling. Therefore, this idea should be placed in the correct position.
That is, it can be mounted parallel to the extension of the cavity 51 of the connecting body 50, and therefore the cable 60 can be inserted straight.

In the above embodiment, the two drive shafts 13 are supported longitudinally in the front and rear sides of the case 1, but the case 1 is a type of frame that supports these drive shafts 13, and therefore this invention does not support other drive shafts. It may be a frame of an appropriate shape. Furthermore, the chain 16 in the above embodiment is not limited to this, and may be any suitable drive transmission band such as a belt or wire. Further, in the above embodiment, a tool such as a wrench is hung on the bolt head 13a of the drive shaft 13, but in this invention, the bolt head 13 is not provided, and a square cross section is provided on at least one side of the drive shaft 13. Tools may be locked to the square cross section.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the location of use of a connecting body using this invention, Fig. 2 is a partial cross-sectional view of the connecting body, Fig. 3 is a partially cross-sectional side view of this invention, and Fig. 4 is a
5 is a sectional view taken along line BB in FIG. 3, FIG. 6 is a rear view of this device, and FIG. 7 is a partially sectional side view showing the device in use. It is. In the figure, 1 is the case, 3 is the connection body clamp base, 7 is the clamp arm, 10 is the tightening bolt, 1
3 is a drive shaft, 15 is a sprocket, 16 is a chain, 17 is a slide block, 18 is a long hole,
19 is a cable clamp, 26 is an L-shaped fitting, 27
29 is a bolt, 32 is a tool, 50 is a connecting body, 51 is a cavity, and 60 is a cable.

Claims (1)

[Scope of utility model registration request] Two drive shafts are supported parallel to each other on both sides in the longitudinal direction of the elongated frame, and a drive transmission band that is linked to the rotation of these drive shafts is hooked to each drive shaft, and one or more of these drive shafts is A rectangular cross section for locking tools is formed on at least one side of both, one side of the cable clamp is fixed to the drive transmission band, and a rectangular cross section is formed at the longitudinal end of the frame opposite to the cable clamp. A cable attachment/detachment device for a connection body, characterized in that it is provided with a connection body clamp that faces the connection body.