JPH0538507Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to an exposed type switch, and more specifically, to an exposed type switch that aims to increase the strength of the support structure for connection terminals such as electric wires. be.

(Prior art) Conventionally, the support structure for the connection terminal in an exposed switch has only to be able to withstand the level of wind pressure, vibration, etc. when the electric wire is attached.
A simple insert structure was adopted in the production of the switch. In this insert structure, as shown in FIG. 7, a mounting recess 40 is provided in the lower part of the side wall of the main body insulator G on the connection terminal side, and a mounting bolt 42 for supporting the connection terminal 41 is implanted in the mounting recess.

(Problems to be Solved by the Invention) However, in the insert structure as described above, the difference in expansion coefficients causes the porcelain to be subjected to stress from within, posing some problems in terms of strength.

Structure of the device (means for solving the problem) This device was made to solve the above-mentioned problem, and in this device, a mounting protrusion is provided on the side of the connection terminal of the main insulator, and a tubular support member that supports the connection terminal is fitted over the mounting protrusion and adhesively fixed thereto.

(Function) By using the above means, since porcelain has a relatively strong property against external pressure, the main insulator made of porcelain and the mounting protrusion are not destroyed in cold weather, and the connection terminal can be easily connected. The strength of the support structure is increased.

(Example) An example embodying this invention will be described below with reference to FIG.

A frame body 2 of the switch AS is attached to an arm of a utility pole (not shown) via a support metal fitting 1, and supports and fixes a main body insulator G downward for each phase. The frame body 2 includes an upper frame 2a and two support rods 3 disposed at a predetermined distance from each other with respect to the upper frame 2a.
The lower frame 2b is connected to the lower frame 2b via the support rod 3, and a pair of sliding guide rods 4 are connected between the upper and lower frames 2a and 2b between the support rods 3.

A fixed electrode 6 is fixed to the inner top of the main body insulator G via a fitting 5, and a connecting piece 7 supported by the fitting 5 is connected to the base end of the fixed electrode 6. The lower end of the connecting piece 7 extends downward and supports an arc extinguishing chamber 8 disposed below the fixed electrode 6. A cylindrical portion 10 as a mounting protrusion provided with a through hole 9 is formed protruding from the side portions of the main body insulator G on the connection terminal sides corresponding to each other. A connecting terminal 11 is fitted onto the outer periphery of the cylindrical portion 10 at a cylindrical flange portion 12 as a support member integrally formed in the center thereof, and
It is adhesively fixed by cementing.

The base end portion of the connecting terminal 11 passes through the through hole 9 of the cylindrical portion 10 and is fastened to the lower end portion of the connecting piece 7 with a bolt 7a. A base end portion of a terminal cover 13 made of insulating synthetic resin is fitted onto the outer periphery of the cylindrical portion 10, and the terminal cover 13 covers the connection portion 11a of the connection terminal 11 that connects the end of the power distribution cable. It is located in

A lifting platform 14 is fitted into the sliding guide rod 4 so as to be slidable in the vertical direction, and a movable insulator 15 corresponding to the main body insulator G rod is fixed upwardly on the upper surface thereof. A movable electrode body 16 is provided on the upper part of the movable insulator 15, and the movable electrode body 16 is formed so that both ends thereof can be inserted into the fixed electrodes 6 on the power supply side and the load side in the main body insulator 4, respectively.

An opening/closing operation mechanism 17 is linked to the lower part of the lifting table 14, and by opening and closing an operation handle 18, the lifting table 14 can be moved up and down via the opening/closing operation mechanism 17.

Now, in the switch AS configured as described above, the connection terminal 11 is fitted onto the cylindrical portion 10 as a mounting projection of the main body insulator G, and fixed by cementing. This structure makes porcelain relatively strong against external pressure.
Even if the flange portion 12 contracts due to the difference in thermal expansion coefficient between the main body insulator G made of porcelain and the flange portion 12 in cold weather, the cylindrical portion 10 will not be destroyed, and the strength of the support structure for the connection terminal 11 will be increased. .

Next, a second embodiment will be described with reference to FIGS. 2 to 5.

Note that the same reference numerals are given to the same or corresponding configurations as in the first embodiment, and the explanation thereof will be omitted (the same applies to each embodiment hereinafter).

In this embodiment, the main body insulator G is provided on the power supply side and the load side, respectively, and the outer part of the main body insulator G, that is, the side part on the connection terminal side, is formed with the lower part open. A mounting protrusion 19 projecting downward is formed on the lower surface of the same side portion, and a bottomed cylindrical support member 20 is fitted onto the mounting protrusion 19 and fixed by cementing. A mounting bolt 21 extending downward is implanted in the support member 20, and the base end of the connecting terminal 11 is tightened to the mounting bolt 21 with a nut 21a.
is fixed to the main body insulator G.

A clamping piece 22 serving as a bypass terminal is riveted to one side of the connecting terminal 11, and its tip extends along the longitudinal direction outward so as to be parallel to the side of the connecting terminal 11. It has been extended.
A support plate 23 made of an insulating synthetic resin is attached to the lower part of the arc extinguishing chamber 8 so as to extend outwardly. A cover plate 25 is rotatably provided. The cover plate 25 is always arranged so as to cover the lower side of the connection terminal 11 by having its side lower surface locked with the upper surface of a locking protrusion (not shown) projected on the inner surface of the main insulator G. .
Further, when the tip of the cover plate 25 is rotated downward, the engagement portion with the engagement protrusion is bent and the engagement with the engagement protrusion is released, whereby the connection terminal 11 to expose the clamping piece 22 to the outside.

Note that 26 is a crimp terminal provided at the end of the power distribution cable that is tightened and fixed to the tip end connection portion of the connection terminal 11 with a bolt.

Bypass cable 2 connected to the clamping piece 22
A fixing fitting 28 is caulked to the end of the connecting fitting 1.
An inverted L-shaped contact 29 that can be hooked is provided in a protruding manner corresponding to the thickness of 1. The bypass cable 2
An insulating cylinder 30 is loosely inserted into the 7th end, and the upper end of the insulating cylinder 30 is screwed into the fixing fitting 28 to selectively rotate the insulating cylinder 30 in one of the circumferential directions. This makes it possible to move up and down with the upper end surface of the fixture 28 as a boundary.

When performing bypass work on a switch equipped with the clamping piece 22 as a bypass terminal configured as described above, the cover plate 25 of the main body insulator G is
From the state shown in the figure, it is disengaged from the locking protrusion (not shown) and rotated downward to open the lower part of the base end of the connection terminal 11. In this state, insert the end of the bypass cable 27 into the main insulator G from below,
The contact 29 is hooked onto the tip of the connection terminal 11. Next, the contact 29 is slid toward the base end of the connecting terminal 11, and the side portion of the contact 29 is inserted between the clamping piece 22 and the connecting terminal 11 and brought into contact. In this state, the insulating tube 30 is rotated in the circumferential direction to move it above the upper surface of the fixing metal fitting 28, and then the insulating tube 30 is brought into contact with the lower surface of the connection terminal 11, and cooperates with the contactor 19. The connecting terminal 11 is sandwiched between the upper and lower parts. In this state, as shown in FIG. 5, the end of the bypass cable 27 is held in contact with the clamping piece 22 serving as a bypass terminal.

In order to remove the bypass cable 27 from the state in which the end portion of the bypass cable 27 is connected to the clamping piece 22 serving as a bypass terminal as described above, the operation opposite to that described above may be performed. That is, the insulating cylinder 30 is rotated in the circumferential direction opposite to that at the time of attachment and moved downward, thereby releasing the contactor 29 from the connection terminal 11 . Next, the contact 29 is moved toward the tip end of the connecting terminal 11 to release the contact 29 from the connecting terminal 11, and then the bypass cable 27 is moved downward from the main body insulator G. Then, the cover plate 25 is rotated upward from the open state and is locked to a locking protrusion (not shown) of the main body insulator G.

In this embodiment, the connecting terminal 11 is fixed in a state where it is fitted onto the mounting protrusion 19 of the main body insulator G via the support member 20, so even if a load is applied to the connecting terminal 11, the internal pressure is applied to the main body insulator G. is never added. Therefore, the strength of the support structure for the connection terminal 11 can be increased. Therefore, even if a load is applied to the connecting terminal 11 when connecting the bypass cable to the clamping piece 22 serving as a bypass terminal of the connecting terminal 11, no trouble will occur.

Next, a third embodiment will be explained with reference to FIG.

In this embodiment, the base end 11b of the connection terminal 11 is integrally formed as a support member, and a recess 31 is formed on the upper surface of the base end 11b.
1, it is externally fitted onto the mounting protrusion 19 and fixed by cementing. Further, the base end portion 11b of the connecting terminal 11 is arranged inward so as to abut against the outer lower surface of the main body insulator G. Further, a male rod-shaped bypass terminal 32 is fixed to the lower surface of the connection terminal 11 corresponding to the recess 31 by screwing, and a contact portion 33 provided at the tip thereof projects downward.

Further, the terminal cover 13 that is fitted onto the outer side of the main body insulator G has its lower part fitted into the lower part of the arc extinguishing chamber 8, and the position corresponding to the bypass terminal 32 is made of insulating synthetic resin. A protective tube 34 is fitted and bonded, and the tip of the bypass terminal 32 is inserted into the protective tube 34G. The lower end of the protection tube 34 has a guide portion 35 whose inner circumferential surface increases in diameter as it goes toward the bottom.
is formed, and is normally removably sealed with a bottomed cylindrical cap 36 made of insulating synthetic resin whose upper portion is fitted into the opening at its lower end. Note that 37 is a cut groove formed in the cap 36 from the upper end, and when the upper part of the cap 36 is inserted into the protective cylinder 34, the upper part is pressed inward by the inner peripheral surface of the protective cylinder 34. It is starting to shrink in diameter.

In this switch AS, when connecting the bypass cable to the bypass terminal 32, a bypass circuit can be formed by simply connecting the female contact provided at the end of the bypass cable with the cap 36 removed. .

When connecting the bypass cable to the bypass terminal 32, a load is applied to the connection terminal 11 as in the second embodiment, but in this embodiment, the main body insulator G
In addition to the effect that no internal pressure is generated, the base end portion 11b of the connecting terminal 11 is disposed in contact with the lower surface of the outer side of the main insulator G, so that the load is dispersed. Furthermore, since the upward moment generated at the base end 11b of the connecting terminal 11 when the bypass cable is removed from the bypass terminal 32 is received by the lower surface of the main body insulator G,
This does not cause any trouble to the support structure of the connection terminal 11.

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.

Effects of the device As detailed above, this device has a property that is resistant to pressure from outside the porcelain, so in cold weather, the mounting protrusion can It will not be destroyed, and the strength of the support structure of the connection terminal will be increased.
This is an excellent idea for industrial use because it has the excellent effect of ensuring greater safety.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an exposed type switch that embodies this invention, Figs. 2 to 5 show a second embodiment, and Fig. 2 is a side sectional view of the main part of the exposed type switch. , Fig. 3 is a plan view of the main part of the connection terminal, Fig. 4 is a front view of the main part showing the end of the bypass cable, Fig. 5 is a side view of the main part, and Fig. 6 is the exposed type opening/closing of the third embodiment. FIG. 7 is a partially cutaway front view of the device, and a cross-sectional view of a main part showing a support structure for a connecting terminal of a conventional exposed type switch. 2...Machine frame, 10...Cylinder part (mounting protrusion), 11
... Connection terminal, 11a ... Connection part, 11b ... Base end part, 12 ... Flange part, 19 ... Mounting protrusion,
20... Support member, 22... Clipping piece, 27... Bypass cable, 28... Fixing metal fitting, 29... Contact, 31... Recess, 32... Bypass terminal, 3
3...Contact part, AS...Switch, G...Main insulator.

Claims (1)

[Claims for Utility Model Registration] 1. A mounting protrusion is provided on the side of the main insulator on the connection terminal side, and a supporting member integrally connected with the connection terminal is fitted onto the mounting protrusion and fixed by adhesive. An exposed type switch characterized by: 2. The exposed type switch according to claim 1, wherein the mounting protrusion is provided in a cylindrical shape on one side of the main insulator. 3. The exposed type switch according to claim 1, wherein the mounting protrusion is provided at a lower part of one side of the main insulator. 4. A utility model registration in which a bolt is installed in the lower part of the support member to be inserted into the base end of the connection terminal, and the connection terminal is supported by tightening a nut that is screwed into the tip of the bolt. An exposed type switch according to claim 3. 5. The exposed type switch according to claim 3 or 4, wherein the support member is placed in contact with the lower surface of the main insulator.