JPH054677Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a structure for preventing the access of birds and animals in exposed type switches, and more specifically, to a support member that supports a movable contact in a pull-up type or push-up type exposed type switch. The present invention relates to a structure for preventing access to birds and animals.

Prior Art Conventionally, for example, a pull-up type exposed switch has a pair of movable contacts 1 at each end of a conductive support member 2, which are arranged so as to be able to come into contact with and separate from a fixed electrode (not shown), as shown in FIG. An insulating coating 3 was applied to the outer surface of the implanted supporting member 2, and a movable insulator 4 was fixed to the upper surface of the central portion of the supporting member 2 by cementing 5 so as to stand up.

However, as shown in Fig. 1, the upper part of the cementing section 5 is exposed, and since the cementing section 5 is not insulating and becomes a live part when the switch is in the closed state, it cannot be opened or closed by a snake or the like. If it were to hang down from the upper frame (not shown) of the device and touch this live part, there was a risk of inducing a ground fault.

Purpose of the invention This invention was made to solve the above-mentioned problems, and its purpose is to prevent ground faults caused by snakes, etc., touching live parts by blocking exposed live parts. The object of the present invention is to provide a structure for preventing the approach of birds and animals.

Structure of the invention In order to achieve the above object, this invention has a conductive support member fixed by cementing to one end of a movable insulator that is driven to open and close, and a movable contact that can connect to and separate from a fixed electrode. In an exposed type switch which is provided with an insulating coating on the outer surface of the supporting member, an exposure prevention cover part is formed in a circumferential manner from the insulating coating so as to surround the cemented part between the movable insulator and the supporting member. The gist is that the distance between the exposed exposure prevention cover part and the insulating folds of the movable insulator that the cover part faces is set to be narrow enough to prevent birds, snakes, and other animals from entering. be.

Embodiment An embodiment embodying this invention will be described below with reference to FIGS. 2 to 5.

First, to explain the exposed type switch, the machine frame 11 of the switch includes an upper frame 14 on which a mounting bracket 13 that is suspended and fixed to an armrest 12 is attached, and four supports hanging from the four corners of the upper frame 14. 15, and a lower frame 16 fixed to the lower end of the support 15. A pair of main body insulators 17 are disposed on the lower surface of the upper frame 14 for each phase, and a fixed electrode 1 is provided on the inner top of each main body insulator 17.
8 is fixedly installed, and an arc extinguishing member 19 made of an insulating material is fixed at a lower position thereof.

As shown in FIG. 4, the arc extinguishing member 19 includes an enclosing part 20 in the shape of a rectangular cylinder with a bottom, and a slit 19 extending downward from the bottom of the enclosing part 20 for arc extinguishing.
a, and a narrowed part 21 in which the opening at the lower end of the narrow gap 19a is widened in a tapered shape, and an overhanging part 22 extending laterally from the lower end of the narrowed part 21.
are integrally formed. Then, the slit 19
On the lower surface of the overhanging part 22 at the periphery of the lower end opening of a, as shown in FIG. is formed protrudingly in a U-shape.

Guide rods 24 (the one on the right in FIG. 3 is not shown) are fixed upright on both sides between the upper frame 14 and the lower frame 16 of the machine frame 11. (see Figure 2) is supported at both ends to be vertically slidable.

A movable insulator 2 is provided for each phase on the lower surface of the support frame 25.
6 is fixed, and a conductive support member 27 is fixed to the lower end of each movable insulator 26. That is, the support member 27 is provided with a mounting protrusion 28 that projects upward at the upper part of its central portion, and the base end of the movable insulator 26 is inserted into a mounting recess 29 recessed in the upper surface of the mounting protrusion 28. It is attached by inserting and cementing 29a.

Each supporting member 27 has an insulating coating 30 applied to its outer peripheral surface, and blade-shaped movable contacts 31 are provided at both ends thereof to protrude upward in correspondence with the fixed electrodes 18.

Exposure prevention plates 30a are formed protruding from the top surface of both ends of the insulating coating 30 to cover the exposed base end portion of the movable insulator 26 side of the movable contactor 31. The entire proximal end portion of the movable contact 31 is covered.
Further, an exposure prevention cover portion 30b is formed on the upper surface of the central mounting projection 28 of the insulating coating 30 so as to protrude upward in a circumferential manner so as to surround the cementing portion 29a. The cover portion 30b provides a gap between the lower insulating folds 26a of the movable insulator 26 and the exposed portion. Reference numeral 30c is a filler made of epoxy resin filled inside the prevention cover portion 30b to prevent the cementing 29a from being exposed.

As shown in FIG. 3, an operating lever 33 is provided on the outside of the operating mechanism section 32 provided on one side of the machine frame 11. A link mechanism (not shown) is operated, and the movable insulator 26 and the support member 2
7 and the movable contact 31 are moved up and down integrally.

In the switch, when the operating lever 33 moves the movable contact 31 and the support member 27 upward through the link mechanism, the movable contact 31 closes the gap 1 of the arc extinguishing member 19.
It is inserted into the fixed electrode 18 through 9a. When the operation of the operating lever 33 is completed, the movable contact 31 is slightly lowered due to the operation loss due to the play in the link mechanism, and the base end of the movable contact 31 protrudes outward. , an insulating exposure prevention wall 23 of the arc extinguishing member 19, and a support member 27.
An exposure prevention plate 30a provided on the insulating coating 30 covers the exposed portion to prevent the exposed portion from being exposed.

As described above, in this embodiment, the cementing portion 2 is provided on the upper surface of the central mounting protrusion 28 of the insulation coating 30.
An exposure prevention cover part 30b that covers the exposed part of 9a is formed to protrude upward in a circumferential manner, and this cover part 30b
As a result, there is a gap between the lower insulation folds 26a of the movable insulator 26 and the insulation coating 30, so there is no risk of a snake or the like touching the cementing 29a, which is a live part, and a ground fault caused by touching the cementing 29a. Accidents can be prevented.

Furthermore, since the movable contact 31 side of the insulating coating 30 is formed to protrude to cover the base end of the movable contact 31, there is no risk that a snake or the like may come into contact with the base end of the movable contact 31, as described above. Instead, it is possible to prevent a ground fault caused by touching the base end of the movable contactor 31.

Note that this invention is not limited to the above-mentioned embodiment, and may be applied to a push-up type movable electrode as shown in FIGS. 6 and 7. In this case, the movable insulator 26 is fixed to the support member 27 covered with the insulation coating 30 by cementing 29a on the lower surface of the center, and the exposure prevention cover part 30b is attached to the lower surface of the insulation coating 30 at the position of the central mounting protrusion 28 of the insulation coating 30.
is formed to protrude downward. This cover portion 30b allows a gap between the upper insulating folds 26a of the movable insulator 26 and the insulating coating 30 to be sandwiched therebetween.

Effects of the invention As detailed above, according to this invention, in particular, an exposure prevention cover part is formed circumferentially protruding from the insulation coating so as to surround the cementing part between the movable insulator and the supporting member, and By setting the gap between the prevention cover part and the insulating folds of the movable insulator that the cover part faces to be narrow enough to prevent birds, snakes, and other animals from entering, the cementing part, which becomes a live part, is It is an excellent idea for industrial use because it can avoid the risk of contact with birds and animals such as snakes, and can prevent ground faults from occurring due to contact with these birds and animals.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional mounting structure between a movable insulator and a support member, Fig. 2 is a partially cutaway side view of the switch, Fig. 3 is a partially cutaway front view of the switch, and Fig. 4 is a perspective view of an arc-extinguishing member, FIG. 5 is a diagram of the mounting structure of the movable insulator of this invention and a support member, and FIGS. 6 and 7 show another example of this invention, showing a push-up type movable insulator and a support member. FIG. 3 is a front view and a side view showing the mounting structure for the device. 11... Machine frame, 14... Upper frame, 16... Lower frame, 18... Fixed electrode, 19... Arc extinguishing member, 26
...Movable insulator, 26a...Insulating fold, 27...Supporting member, 28...Mounting protrusion, 29...Mounting recess,
29a... Cementing, 30... Insulating coating, 3
0a...Exposure prevention plate, 30b...Exposure prevention cover portion, 31...Movable contact.

Claims (1)

[Claims for Utility Model Registration] A conductive support member is cemented and fixed to one end of a movable insulator that is driven to open and close, and the support member is provided with a movable contact that can be brought into contact with and separated from the fixed electrode. In an exposed type switch whose outer surface is coated with an insulating coating, the insulating coating 3 is provided so as to surround the cementing 29a between the movable insulator 26 and the support member 27.
Insulating folds 26a of the movable insulator 26, in which an exposure prevention cover part 30b is formed to protrude in a circumferential manner from 0, and the exposure prevention cover part 30b and the cover part 30b are opposed to each other.
A structure for preventing access to birds and animals in an exposed type switch, characterized in that the distance between the two is narrow enough to prevent birds, snakes, and other animals from entering.