JPS628106Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a safety latching device for a disconnector.

As is well known, disconnectors are provided with a safety latch device to maintain a generally closed state when the circuit is in a closed state. Generally, this safety latch device includes a guide plate provided with one fixed contact, a hook member provided on the movable contact side, and a guide plate fixed together so that the movable contact can be inserted smoothly. , and a latch pawl that engages the hook member. Therefore, in the case of mass production, at least the above three types of parts must be managed as a safety latching device, and during assembly work, the distance between the hook member and the latch pawl must be adjusted, that is, how the two should engage, and how they should be engaged. It is necessary to accurately adjust the fitting size (amount), which has the disadvantage that it takes a lot of time to assemble.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a safety latching device that has a small number of parts and can shorten assembly and adjustment time.

Next, it will be explained in detail using the drawings.

Figures 1 to 3 are for explaining conventional disconnectors, and 1a and 1b are supporting insulators, each of which is attached to a base 2 in a V-shape, and a movable contact 3 is attached to one of the supporting insulators. It is rotatably attached to the upper end of the support insulator 1b. 4a and 4b are fixed contacts, and a charging guide 5 and a latch pawl 6 are attached to one fixed contact 4a by bolts 7. The free end of the latch pawl 6 is bent toward the rotation fulcrum of the movable contact 3.

2 so as to sandwich the fixed contacts 4a and 4b from the outside.
A movable contact 3 made of a single conductor is provided with a hook member 8 that engages with a latch pawl 6, and is brought into sliding contact with fixed contacts 4a and 4b by contact springs 9a and 9b. Can be assembled.

To assemble this disconnector, leave the bolt 7 loosened, and then connect the guide 5 and latch pawl 6.
After setting the position so that the movable contact 3 can be operated smoothly and can be properly engaged and disengaged from the hook member 8, it is strongly tightened, but this requires a lot of effort. Ta.

Figures 4 to 7 show an embodiment of the present invention, which was made to eliminate the disadvantages of the conventional device, and in these figures, the same reference numerals as those used in Figures 1 and 2 are used. Or corresponding parts are given the same reference numerals. As is clear from these FIGS. 4 to 7, according to the present invention, the input guide 5 is bent into a fishhook shape, and the tip thereof is a latch pawl 5', and the bent portion is inclined in the width direction of the input guide. A surface 5'' is provided.Therefore, the movable contact 3 is guided by this sloping surface during insertion and can make good contact with the fixed contact.

In the process of inserting the movable contact, the tip 8' of the hook member 8 slides on the surface of the latch pawl 5' while giving flex to the latch pawl 5', and finally the tip 8' touches the latch pawl 5'. Enter the underside of the edge 5″.
The movable contact can no longer separate as easily as the fixed contact, and will not separate even when subjected to vibrations or the like.

As described above, according to the present invention, by giving the loading guide itself the role of a latch pawl, the purpose can be achieved with one part, compared to the conventional case where two parts are used. , parts management,
Assembling work and adjustment work can be greatly simplified.

Furthermore, according to the present invention, if the hook member provided on the movable contact side is omitted, it becomes a disconnector without a safety latching device, so if necessary, it can be modified as a low-cost disconnector without a safety latching device. is also easy.

[Brief explanation of the drawing]

Figures 1 to 3 are a front view, a plan view, an enlarged partial side view of the main parts, and a fourth figure of a conventional disconnect switch, respectively.
6 to 6 are a front view, a plan view, and a sectional view taken along the line A-A of FIG. 4, respectively, showing an embodiment of the present invention.
FIGS. 7A and 7B are a side view and a front view of the input guide, respectively. 3 is a movable contact, 4a, 4b are fixed contacts, 5
is the loading guide, 5' is the latch pawl, 5'' is the inclined surface, 5
8 is a hook member, and 9a and 9b are contact springs.

Claims (1)

[Scope of utility model registration request] A loading guide is provided, the tip of which is bent into a fishhook shape, and the bent portion is inclined in the width direction so that the top becomes thinner. Consisting of a pair of parallel conductors that are fixed to one fixed contact so that the top of the part projects above the fixed contact, and that are in sliding contact with the other fixed contact from both sides and supported as a fulcrum. A safety latch device for a disconnector, characterized in that a hook member that engages with the tip of the input guide is mounted on the movable contact.