JPH0447856Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to the structure of a disconnecting contact device that connects and separates a main circuit terminal of a circuit breaker or switch from a busbar.

[Technical background of the invention and its problems]

For example, in electrical equipment such as a closed switchboard, in order to facilitate maintenance and inspection, a disconnecting contact device is provided to connect and disconnect the main circuit terminal of the circuit breaker or switch from the bus bar, and the device is stored in a closed box so that it can be taken in and out. ing.

As shown in FIGS. 4 and 5, this disconnection contact device has contact pieces 1 and 2 in a one-to-one configuration, and furthermore, this pair is made to face each other to form one set, and one end is provided with an insulating support on a closed switchboard. Arc-shaped contact portions 1a and 2a are provided protrudingly in contact with the fixed-side conductor 3, and an arc-shaped contact portion 1b is provided at the other end in contact with the main circuit terminal of the circuit breaker or switch, that is, the movable-side conductor 4. ,2
b is provided in a protruding manner, and as shown in FIGS. 6 and 7, the extruded portions 1c and 2c formed facing each other are brought into contact with each other, and a predetermined distance is maintained so that the contact pieces 1 and 2 do not come too close together. I'm keeping it. Further, a hole is provided in the longitudinally intermediate portion of the contact pieces 1 and 2, into which a pin 5 is inserted, and a tension spring 6 is stretched between the opposing pins 5 and 5, and a predetermined distance is maintained by a spacing plate 7. Oval holes 1d and 2d are provided at the longitudinal ends of the contact pieces 1 and 2, and pins 8 are inserted therein. Further, a plurality of pairs of contact pieces 1 and 2 according to the current carrying capacity are maintained at a predetermined distance by inserting a spacing piece 9, and a support plate 10 shown in FIG. 8 is applied to the outer surface and fixed with bolts 11. Note that the hole 10a shown in FIG.
1 passes through the hole 10b, a small diameter portion provided at the end of the pin 8 is inserted into the hole 10b, and a protruding portion (not shown) provided on both end surfaces of the spacing plate 7 is inserted into the hole 10c.

With the above structure, when the movable conductor 4 is inserted between the opposing contact parts 1b and 2b of the contact pieces 1 and 2 in FIG. 4, the contact parts 1a and 2a of the contact pieces 1 and 2 are Since the contact parts 1b and 2b are in contact with the fixed conductor 3, they are pressed by the movable conductor 4, and the contact pieces 1 and 2 are separated from the spacing plate 7, and the tension spring 6 causes the contact parts 1a, 2a and 1b to be moved away from the spacer plate 7. ,2b
is pressed with sufficient contact pressure to contact the fixed side conductor 3 and the movable side conductor 4. When the movable conductor 4 is also removed, the contact pieces 1 and 2 are pulled by the tension spring 6, and contact the spacer plate 7, causing the opposing contact parts 1b,
2b are kept open.

The disconnection contact device shown in FIGS. 9 and 10 has the same structure as the above-described disconnection contact device except for the structure for attaching the contact pieces 1 and 2 to the fixed conductor 3. That is, the support plate 12 for attaching the contact pieces 1 and 2 to the fixed conductor 3 has a hole 12a at its longitudinal end into which the small diameter part of the end of the pin 8 is inserted, as shown in FIG. Bend the end to form the tongue part 12b.
This tongue portion 12b is provided with a hole 12c through which the bolt 11 passes. Note that this disconnection contact device also contacts or opens in the same manner as described above when the movable conductor 4 is inserted or removed.

However, since the disconnection contact device configured as described above is fixed to the fixed conductor 3 with the bolts 11, the external dimensions of the circuit breaker or switch are increased. That is, in the case shown in FIGS. 4 and 5, since the bolts 11 protrude from the side surface of the support plate 10, an insulating distance from the surroundings must be secured from the top of the protruding bolts 11. 9 and 10, the head of the bolt 11 does not protrude from the side surface of the support plate 12, but the tongue portion 12b for fixing to the fixed conductor 3 by the bolt 11 is This is because it is longer than those shown in FIGS. 4 and 5.

Therefore, when the installation space for the circuit breaker or switch is increased or when the circuit breaker or switch is housed in a housing, there is a drawback that the housing must be large.

[Purpose of invention]

The present invention was made in view of the above-mentioned circumstances, and aims to provide a disconnecting contact device for a circuit breaker or switch that is easy to attach to a fixed conductor and has a small external size. .

[Summary of the idea]

In the present invention, adjacent protrusions facing each other are provided and brought into contact with each other, and a first
A disconnecting contact for a circuit breaker or switch configured such that a plurality of contact pieces passing through a pin are opposed to each other, and both ends of the first pin are caulked and integrated with a support plate disposed on the outermost side of the contact pieces. In the device,
By attaching the contact piece between the protrusion and the first pin by penetrating the second pin into the fixed conductor, there is no protrusion on the outer surface of the support plate, making it smaller and easier to fix. It is something.

[Example of idea]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the disconnection contact device for a circuit breaker or switch according to the present invention will be described below with reference to the drawings. Note that the same parts as in FIGS. 4 to 11 are given the same reference numerals, and redundant explanation will be omitted. 1 and 2, a disconnection contact device 20 for a circuit breaker or switch has a plurality of sets of contact pieces 1 and 2 according to the current carrying capacity arranged between spaced pieces 9. are inserted and maintained at a predetermined distance, a support plate 21 is brought into contact with both outer surfaces of the pin 8, and the small diameter portions at both ends of the pin 8 are caulked to the support plate 21. Here, the support plate 21 is formed in an E-shape as a whole as shown in FIG. 3, and a hole 21a into which the small diameter portion of the pin 8 is inserted and caulked is provided at the end.

The contact pieces 1 and 2 integrated in this way have the pin 8 and the opposing extruded parts 1c and 2c of the contact pieces 1 and 2.
The spring pin 22 inserted between the two is fixed by driving into the fixed conductor 3.

By configuring as above, the support plate 21
Since there is nothing protruding from the side of the circuit breaker or switch, the external dimensions of the circuit breaker or switch are reduced for the reasons mentioned above. In addition, it can be fixed simply by driving the spring pin 22, which not only makes it easier to fix than conventional bolt tightening, but also makes it possible to fix the fixed side conductor 3.
The hole is simply provided through the hole, eliminating the need for a screw hole and facilitating machining. Furthermore, even if the current carrying capacity increases and the number of contact pieces 1 and 2 increases, it is only necessary to increase the number of spring pins 22, and there is no need to change the support plate 21, so it is easy to respond to changes in current carrying capacity. It becomes easier.

[Effect of idea]

Since the present invention is configured as described above,
It can be easily attached to the fixed conductor, making it easy to assemble the circuit breaker or switch, and there is nothing protruding from the outside surface of the support plate, making it compact. Can be made small.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of a disconnecting contact device for a circuit breaker or switch of the present invention, Fig. 2 is a plan view of an embodiment of the invention, and Fig. 3 is a plan view of an embodiment of the invention. A front view showing the main parts, FIG. 4 is a front view of a conventional disconnecting contact device for a circuit breaker or switch, FIG. 5 is a plan view of a conventional disconnecting contact device, and FIG. 6 is a contact diagram of a conventional disconnecting contact device. A front view showing the piece; FIG. 7 is a sectional view taken along line A-A in FIG. 6 and viewed in the direction of the arrow;
FIG. 8 is a perspective view showing a support plate of a conventional disconnecting contact device, FIG. 9 is a front view showing a conventional disconnecting contact device different from FIG. 4, and FIG. 10 is a conventional disconnecting contact device different from FIG. 5. FIG. 11 is a perspective view showing a support plate of a conventional disconnecting contact device, which is different from FIG. 8. 1, 2...Contact piece, 1a, 1b, 2a, 2b...
...Contact portion, 3... Fixed side conductor, 4... Movable side conductor, 6... Tension spring, 21... Support plate.

Claims (1)

[Claims for Utility Model Registration] (1) Adjacent and mutually opposing protrusions are provided and brought into contact with each other, and a plurality of contact pieces passing through a first pin are provided at the outer ends of the protrusions and face each other, and a disconnecting contact device for a circuit breaker or a switch configured such that both ends of the first pin are respectively caulked and integrated with a support plate disposed on the outermost side of the contact piece, and the contact piece is connected to the protruding portion. A disconnecting contact device for a circuit breaker or switch, characterized in that a second pin is attached to the fixed conductor by penetrating the fixed side conductor between the first pin and the first pin. (2) A disconnecting contact device for a circuit breaker or switch according to claim 1, wherein the second pin is a spring pin. (3) The disconnection contact device for a circuit breaker or switch according to claim 1 of the utility model registration claim, in which the support plate is formed in an E-shape.