JPH0226175Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a cut-out arm arm that also serves as a pin insulator.

Purpose: By inserting and fixing a cylindrical cutout through an arm arm, this design strengthens the installation by supporting the cutout body, which also has the function of supporting the bus bar, and simplifies the installation of pillars and reduces the space required for installing pillars. The purpose is to reduce the size of the

Embodiment An embodiment embodying this invention will be described below with reference to FIGS. 1 to 3.

The cross arm 3 supported cantilevered by a tightening band 2 fixed to the outer periphery of the utility pole 1 is made of lightweight aggregate with an inverted channel or U-shaped cross section, and there are holes on the top corresponding to each phase. As shown in FIG. 2, an insertion hole 4 is provided that extends vertically.

The cylindrical cut-out body insulator 5 inserted into the insertion hole 4 from above has a flange 6 as a metal ring made of aluminum or the like fixed to the outer periphery of the body by cementing and is locked to the upper surface of the cross arm 3. and is tightened and fixed by a plurality of bolts 7 inserted through the arms 3.

A through hole 5a passing through both upper and lower ends is formed in the axial direction of the main insulator 5, and an aluminum upper flange 8 is cemented and fixed to the outer periphery of the upper end, and the upper end surface of the upper flange 8 is the upper end surface of the main insulator 5. We are all on the same page. Upper flange 8
A conductive fixed clamp member 1 made of brass or the like is attached to the upper end surface of the main insulator 5 via a zinc buffer plate 9.
0 closes the through hole 5a.
It is tightened and fixed by a bolt 11 that is screwed into.

A ring-shaped fitting groove 12 is recessed in the lower surface of the fixed clamp member 10, and the fitting groove 12 is recessed.
A rubber packing 13 fitted to the bolt 2 comes into watertight contact with the buffer plate 9 when the bolt 11 is tightened.

The fixed clamp member 10 has a locking groove 14 recessed in the center of its upper part, and a pair of bolts 15 protruding from both legs thereof. A movable clamp member 16 is inserted into and supported by the bolt 15 on both sides thereof, and a clamp groove 18 is recessed in the lower surface of a clamp protrusion 17 that projects downward from the center of the movable clamp member 16. .

Then, by tightening the nut 19 screwed onto the bolt 15, both the fixed and movable clamp members 1 are secured.
The movable clamp member 16 is strongly pressed in the direction of the fixed clamp member 10 while the bus bar 20 is clamped between the clamping grooves 14 and 18 of No. 0 and 16 so as to be electrically conductive.

The lightning horn 8a bolted to the outer periphery of the upper flange 8 faces the lightning horn 6a, which is also bolted to the outer periphery of the flange 6, at a distance,
When a large current flows due to a lightning surge or the like, the arc is blown at this portion and grounded to protect the inside of the main body insulator 5.

As shown in FIG.
A connecting bolt 22, which is housed in the through hole 5a through the buffer plate 9, is screwed into the lower surface of the center at its outer end, and a connecting member 23 is screwed into the inner end of the connecting bolt 22 from below. There is. Further, a connecting bolt 24 is screwed into the inner end of the connecting member 23 from below, and a regulating plate 25 having approximately the same diameter as the inner circumference of the through hole 5a is provided between the head of the connecting bolt 24 and the connecting member 23. A pair of upper and lower clamping members 26 are screwed together. When the regulating plate 25 comes into contact with the inner periphery of the through hole 5a, the connecting member 23 and the connecting bolt 24
is positioned at the center of the through hole 5a.

Similarly, in the connecting bolt 24, a stabilizing member 27 is screwed between its head and a lower clamping member 26, and a tulip-shaped upper portion is provided between the stabilizing member 27 and the head of the connecting bolt 24. Electrode 28
is loosely inserted and locked so that it can swing.

Note that from the head of the connecting bolt 24 to the upper electrode 28
In between, a spring 3 for suspending the arc extinguishing rod 29
The proximal end of 0 is attached. Moreover, the upper electrode 28
At the bottom, an arc extinguishing tube 31 is attached to the through hole 5a, which cooperates with the arc extinguishing rod 29 and contributes to the slit arc extinguishing action.

An enlarged diameter portion 33 is formed at the lower part of the through hole 5a of the main body insulator 5 via a locking step portion 32, and the enlarged diameter portion 3
3 Inside the lower end opening is a synthetic resin hook member 34.
is fixed with cementing. A lower electrode guide member 35 is engaged with the upper part of the hook member 34.

The lower electrode guide member 35 has a truncated conical guide portion 36 formed on the inner periphery of the lower part, and a lower electrode 38 is screwed to an electrode support plate 37 fixed on the inner periphery of the upper part. The inner end of the load side lead wire 40 is connected to the electrode support plate 37 via the lower connection terminal 39.

Further, a stopper 42 is provided between the upper end of the lower electrode guide member 35 and the locking step portion 32.

The current limiting fuse link 43 accommodated in the through hole 5a has an upper contact 44 at the upper end connected to the upper electrode 2.
8 and the arc extinguishing rod 29 so as to be removable and releasable, and the lower contact 45 at the lower end is connected to the lower electrode guide member 35.
The lower electrode 38 is removably fitted into the lower electrode 38 of the lower electrode 38 .

A sealing stopper 47 made of transparent synthetic resin that is hermetically fitted into the lower end opening of the hook member 34 has a plurality of (three in this embodiment) locking fittings 4 arranged on the outer periphery.
6, it can be locked to the opening, and when the fuse of the current limiting fuse link 43 is blown, it can be removed from the opening by a striker 48 protruding from the lower end of the current limiting fuse link 43. Incidentally, reference numeral 49 is a connecting string whose one end is attached to the hook member 34, and the other end is attached to the sealing plug 47.

Now, in the power-on state, the electric circuit is bus bar 20 →
Fixed clamp material 10 → connecting bolt 22 → connecting member 23 → connecting bolt 24 → upper electrode 28 → upper contact 44 of current limiting fuse link 43 → lower contact 4
5→lower electrode 38→load side lead wire 40.

Now, to open this circuit, pull down the current limiting fuse link 43 with an operating rod (not shown), and the upper contact 44 will connect to the upper electrode 28 of the main body insulator 5.
The arc is extinguished by the arc extinguishing rod 29 and the arc extinguishing tube 31, and then the lower contact 45 of the current limiting fuse link 43 is detached from the lower electrode of the main body insulator 5, and the current limiting fuse link 43 is removed. Can be done.

Furthermore, when a large current flows to the load side, the current limiting fuse link 43 melts and the large current is immediately cut off, thereby protecting the transformer (not shown) connected to the load side. can.

Furthermore, in this invention, by directly attaching the bus bar 20 to the upper part of the cylindrical cutout, it can be used both as a conventional pin insulator and a cutout switch, so that the installation of the pillar can be simplified.

Effects In this way, by inserting and fixing the cylindrical cutout into the cross arm, the cutout main body, which also serves as a support for the bus bar, can be supported, making the installation strong, and the cross arm This is an excellent idea for industrial use, as it can be installed within the width of the column, and has excellent effects in simplifying the installation of pillars and reducing the space required for installation.

It should be noted that this invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of this invention.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment embodying this invention in a pillar-mounted state, Fig. 2 is a sectional view of a cut-out switch also used in this embodiment, and Fig. 3
The figure is also a side view. Bracelet 3, main body insulator 5, flange 6, bolt 7,
Fixed clamp member 10, movable clamp member 16,
Bus bar 20, upper electrode 28, and lower electrode 38.

Claims (1)

[Claims for Utility Model Registration] 1. A clamping device consisting of a fixed clamping member 10 for fixing the bus bar 20 and a movable clamping member 16 is provided in the upper part, and an upper electrode electrically connected to the clamping device is provided inside. 28 and a lower electrode 38, and between the upper and lower electrodes, a cylindrical cut-out with a cut-off section consisting of a current limiting fuse etc. and a load switching function is attached to the cross-section arm 3 having a reverse channel shape or a U-shape. An arm arm with a cutout that also serves as a pin insulator, characterized by three pieces inserted and fixed in a row. 2. The cylindrical cutout is fixed to the cross arm by a flange provided on the outer periphery of the main insulator of the cylindrical cutout, and the flange and the cross arm are further fastened with bolts. An arm arm with a cutout that can also be used as a pin insulator as set forth in claim 1 of the patent registration claim. 3. An arm arm with a cutout that also serves as a pin insulator according to claim 2 of the utility model registration claim, wherein the flange is a metal ring cemented approximately in the center of the main insulator. 4. An arm arm with a cutout that also serves as a pin insulator as set forth in claim 2 or 3 of the utility model registration claim, characterized in that the lower surface of the flange is fastened to the upper surface of the arm arm so that the lower surface of the flange comes into contact with the upper surface of the arm arm.