JPH0329945Y2 - - 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.

Previously, overhead power lines had three phases strung at regular intervals, but triplex cables were introduced to address issues such as urban overcrowding, rapidly increasing demand for electricity, and complicating firefighting efforts in 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 male plug 61 compressed at the end of the cable 60 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, replacing a cable due to a change in capacity, or removing a cable, 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.

The structure of this invention is such that a rotatably supported shaft protrudes from one side of the connection body clamp base, a threaded portion is provided on the outer periphery of one side of the shaft, and the shaft protrudes from the other side of the connection body clamp base. A bevel gear is fixed to the drive shaft, and the upper surface of the board of the drive shaft, which passes through the board protruding above the bevel gear from the connection body clamp base, has a rectangular cross section;
A bevel gear that meshes with the bevel gear is fixed to a drive shaft hanging below the board, and a cable clamp whose screw hole is screwed into the threaded part of the shaft is opposed to the connection body clamp base. A guide shaft protruding from the connecting body clamp base in parallel with the shaft is loosely inserted into the hole of the cable clamp, and the cable clamp pivotally supports one end of the clamp piece having a clamping groove for clamping the outer periphery of the cable. , the other end of which can be freely fixed to the cable clamp, and one end of each of two clamp arms that can freely clamp the outer edge of the connection body is pivotally supported at one end of the connection body clamp base, and the other ends are engaged with each other. This is a connector cable attachment/detachment device that can be freely stopped.

An embodiment of this invention will be described below with reference to the drawings. 1 is a connection body clamp base; 2 is a shaft passing through the base 1; 3 is a threaded portion provided on the outer periphery of the shaft 2 protruding outward from one side of the base 1;
5 is a bevel gear fixed to the outer periphery of the shaft 2 protruding to the other side of the base 1; 5 is a bevel gear fixed on one side to the upper end of the connecting body clamp base 1 with a screw 6;
A substrate 7 whose other side protrudes above the bevel gear 4;
The bolt head is positioned on the upper surface of this board 5, and the lower part is a bolt-shaped drive shaft that passes through the board 5 and hangs down. 8 is a bevel gear fixed to the outer periphery of the drive shaft 7 below this board 5. The gear 8 meshes with the bevel gear 4. Reference numeral 9 denotes a hanging plate hanging from both sides of the lower surface of the board 5, and 10 a cover which overlaps the hanging plate 9 with its own side plates and fixes it under the board 5 with screws 11. , 8. Guide shafts 12 are projected from both sides of the connection body clamp base 1 with the shaft 2 in between, parallel to the shaft 2, and these guide shafts 12 are supported and fixed to the base 1, respectively. Reference numeral 13 designates a cable clamp, and this cable clamp 13 has a threaded hole 14 formed through itself and is screwed onto the threaded portion 3 of the shaft 2, and the guide shaft 12 is inserted into the holes 15 on both sides of this threaded hole 14, respectively. ing. 1
6 is a stopper nut provided at the tip of the shaft 2 to prevent the cable clamp 13 from falling; 13a is a clamp piece provided integrally at the bottom of the cable clamp 13; the clamp piece 13b is held by a pin 17 provided on one side; The free end of the tightening bolt 18, which is pivotally supported on the other side, can be freely attached and detached to a locking hole (not shown) of the other clamp piece 13b, and a wing nut 19 is screwed to this free end. ing. Reference numeral 20 denotes an attachment detachably provided on these clamp pieces 13a and 13b, and a semicircular hole 21 is provided in the center of these attachments 20 to form a circle when they are put together. Reference numeral 22 denotes a bent clamp plate which is rotatably suspended from both sides of the lower part of the connecting body clamp base 1, and the inner edge of each of these clamp arms 22 is formed with a cross-sectional ridge 22a. Reference numeral 23 denotes two pairs of holes drilled on both sides of the outer and middle sides of the connection body clamp base 1, and 24 passes through the upper end of each clamp arm 22 and is removably inserted into the pair of holes 23 of the connection body clamp base 1. The clamp arm 22 is rotatably supported around this bending pin 24. 2
Reference numeral 5 denotes a tightening bolt whose one end is rotatably supported at the lower end of one clamp arm 22, and the free end of this tightening bolt 25 can be freely inserted into a locking hole 26 bored at the lower end of the other clamp arm 22. be. 27 is a tightening nut screwed onto the free end of this tightening bolt 25.

This invention has the above structure, and the connecting body 50 has
To insert the cable 60 with the compression plug 61 at the tip, first loosen the tightening nuts 27 at the ends of the clamp arms 22 on both sides of the detacher of this invention, and remove the tightening bolt 25 from one clamp arm 22. , remove the bending pin 24 and move and fix each clamp arm 22 into one of the two pairs of holes 23 according to the diameter of the connecting body 50, and attach the clamp arms 22 on both sides to the uneven portion 53 at the end of the connecting body 50. Fit the convex strip 22a on the inner edge of the clamp arm 22 on both sides to clamp the uneven portion 53 of the connecting body 50, and fit the tightening bolt 25 of one clamp arm 22 into the locking hole 26 of the other clamp arm 22. Then tighten the tightening nut 27 from above. As a result, the end portion of this device is supported and fixed to the connecting body 50, and the shaft 2 is extendedly supported and projected from the connecting body 50. Then, loosen the wing nut 19 of the cable clamp 13, remove the tightening bolt 18 from the clamp piece 13b, open the clamp piece 13b by turning it around the pin 17, and remove and insert the attachment 20 of each clamp piece 13a, 13b. An attachment 20 having a semicircular hole 21 that matches the diameter of the cable 60 is attached to each clamp piece 13a, 13b. Then, the cable 60 whose tip is inserted into the cavity 51 of the connection body 50 in advance is inserted into each semicircular hole 21 of each attachment 20.
the clamp pieces 13a and 13b, and the locking hole (not shown) at the end of the clamp piece 13b.
Insert the free end of the tightening bolt 18 into the
Tighten 9. As a result, the cable 60 is clamped by the cable clamp 13. Therefore, a tool 2 such as a wrench is attached to the bolt head of the drive shaft 7 on the board 5.
8 and by turning the handle of this tool 28, the shaft 2 rotates via the bevel gears 4 and 8, and the cable clamp 13 is prevented from rotating by the guide shaft 12 inserted into the hole 15 of the shaft. The cable clamp 13 screwed onto the threaded portion 3 of the shaft 2 moves and propels the shaft 2 in the longitudinal direction.
Therefore, the cable 60 held by the cable clamp 13 is also propelled and inserted into the inner part of the cavity 51 of the connecting body 50. At this time, the rotation of the tool 28 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 compared to inserting the cable 60 only by hand. Easy to insert, cable 60
The same holds true when pulling out the connector 50 from the connecting body 50.

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 force moves with the movement and is far from the connection body, so a large bending load is generated on the support frame such as a rack supported at the end of the connection body and the connection body. There is a risk of damaging the connecting body, and there is also a possibility that the cable 60 cannot be inserted straight into the cavity 51 of the connecting body 50. However, in this invention, as shown in FIG. 6, the point of force, that is, the drive shaft 7 in this case, does not move and is located above the connecting body 50, so no bending load is applied to the connecting body 50, which may damage the connecting body 50. There is no fear. Further, the cable 60 can be propelled straight along the shaft 2 and inserted straight into the cavity 51 of the connecting body 50.

Furthermore, when inserting the cable 60 into the connecting body 50 in the rack type or chain type, if the cable 60 is stopped halfway, it may be pushed back by the air in the cavity 51, and the cable 60 may be pulled out from the connecting body 50. Since the border cavity 51 is in a vacuum state, it may be pushed back in the same way as above. In this regard, in the case of the screw type of this invention, since the thread is cut approximately perpendicular to the direction of propulsion of the cable clamp 13, the cable clamp 13 does not move even under the pressure of the air, etc., and the cable 60 can be inserted.
Even if it is in the middle of being removed, it will not return. Therefore, even if the worker is working at a high place in a bad posture and it takes a long time, the work can be performed stably. Further, in the case of the screw type, a large job can be done with little effort, and if the handle of the tool 28 is made longer, the cable 60 can be attached to and detached from the connecting body 50 with even less effort.

Further, in the embodiment described above, the cable 60 is not damaged when the cable 60 is held by the cable clamp 13 because the entire circumference of the cable 60 is held by the inner circumferential edges of the semicircular holes 21 of the two upper and lower attachments 20. Furthermore, the connecting body clamp consisting of the connecting body clamp base 1 and the two clamp arms 22 of the above embodiment has the convex strip 22a on the inner peripheral edge of the clamp arm 22 fitted into the concave and convex portion 53 at the end of the connecting body 50, and the clamp arms on both sides 22 clamp the end of the connecting body 50, and these clamp arms 22 grip the uneven portion 53 of the connecting body 50 as shown by the dashed line in FIG.
Since the outer periphery is supported at at least four points, the device can be supported on the connecting body 50 reliably and firmly without wobbling. The device can therefore be installed in the correct position, ie parallel to the extension of the cavity 51 of the connecting body 50, and the cable 60 can therefore be inserted directly.

Although two guide shafts 12 are provided in the above embodiment, the purpose of these guide shafts is to prevent the cable clamp 13 from rotating and to reinforce the shaft 2, and only one guide shaft may be used.

As described above, when connecting a cable to a connecting body or removing a cable from a connecting body, this device fixes the cable attaching device of this invention to the connecting body and allows the cable clamp to grip the cable. can be mechanically attached to and detached from the connecting body. In this way, when a cable is attached to or removed from a connecting body, this invention wraps the two clamp arms pivoted on the cable clamp base around the outer edge of the connecting body on the column, and connects the free ends of these clamp arms to each other. The detachable device of this invention can be easily fixed to the connecting body.

Further, the outer periphery of the cable can be easily fixed to the cable clamp of this detachable device by holding the outer periphery of the cable with the clamp piece. Therefore, the cable attachment/detachment device of this invention is a simple one that has a threaded shaft and a guide shaft between the connection body clamp base and the cable clamp, and is small enough to be attached to the connection body on a pole. can do.

Moreover, since the cable clamp is propelled by the screw, the propulsion force is extremely strong. Further, in order to rotate this screw, if the tip of a tool such as a wrench is engaged with the rectangular cross section of the drive shaft and the tool such as a wrench is turned, the screw can be easily rotated by the force of the lever.

In addition, with this design, the drive shaft, which is the point of effort, does not move and this point of effort is located above the connection body, so when connecting or disconnecting the cable to or from the connection body, no bending load is applied to the connection body or cable, resulting in stable operation. is possible.

Also, when inserting the cable into the connection body, if you stop inserting the cable midway through, the cable may be pushed back due to the pressure of the air inside the connection body.
In this device, the thread is cut approximately perpendicular to the direction of propulsion of the cable clamp, so it will not be pushed back.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the location where the connecting body using this invention is used, Fig. 2 is a partial sectional view of the same connecting body, Fig. 3 is a partially sectional side view of this invention, and Fig. 4 is a front view of the same. 5 is a rear view of the same, and FIG. 6 is a partially sectional side view showing the device in use. In the figure, 1 is the connection body clamp base, 2 is the shaft, 3 is the screw part, 4 and 8 are bevel gears, 5 is the board,
7 is a drive shaft, 12 is a guide shaft, 13
is a cable clamp, 14 is a screw hole, 18 is a tightening bolt, 22 is a clamp arm, 25 is a tightening bolt, 28 is a tool, 50 is a connecting body, 51 is a hollow part,
60 is a cable.

Claims (1)

[Scope of utility model registration request] A rotatably supported shaft protrudes from one side of the connection body clamp base, a threaded portion is provided on the outer periphery of one side of the shaft, and a bevel gear is fixed to the shaft protruding from the other side of the connection body clamp base. The upper surface of the board of the drive shaft passing through the board protruding above the bevel gear from the connection body clamp base is square in cross section, and the bevel gear meshing with the bevel gear is fixed to the drive shaft hanging below the board. A cable clamp having its own screw hole screwed into the threaded part of the shaft is provided opposite to the connection body clamp base, and a guide shaft protruding from the connection body clamp base in parallel with the shaft is attached to the cable clamp. The cable clamp pivotally supports one end of the clamp piece having a clamping groove for clamping the outer periphery of the cable;
The other end can be fixed to the cable clamp, and one end of each of two clamp arms that can freely clamp the outer edge of the connection body is supported on one end of the connection body clamp base, and the other ends are locked together. A cable attachment/detachment device for connecting bodies that is characterized by its flexibility.