JP2594154Y2 - Air switch for pole - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pole air switch in which an insulating plate can be easily incorporated.

[0002]

2. Description of the Related Art The internal insulation structure of a conventional on-pole air switch is constructed as shown in FIGS. That is,
A lower insulating plate 3 is fixed by bolts 4 to mounting seats 2 arranged at four corners on the inner bottom surface of the switch box 1. Similarly, four mounting seats 6 are provided on the back surface of the switch cover 5,
An upper insulating plate 7 is fixed to the mounting seat 6 with bolts 8. Inside the front surface of the switch box 1, side insulating plates 12, 13 for separating the operation mechanism section 9 from the movable contact 11 inside are mounted. The movable contact 11 is operated by an external operation handle 10. The side insulating plates 12 and 13
Bolt insertion holes 12a to 12c, 13a to 1 respectively
3c are formed, and the respective cutouts are installed in the switch box 1 before mounting.
The side insulating plates 12 and 13 are overlapped with each other so as to surround.

[0003] Next, after matching the holes 12a, 12b with the holes 13a, 13b, bolts 16 and 17 are inserted, and nuts 21 and 22 are inserted through flat washers 18 and 19.
To fix and integrate the side insulating plates 12 and 13 together. At the same time, the hole 12c formed in the upper left corner of the side insulating plate 12 is aligned from the inside with the screw hole 23a of the mounting seat 23 which is previously provided on the inner surface of the switch box 1 by welding. The side insulating plate 12 is fixed to the switch box 1 by tightening the bolt 25 from the side via the flat washer 24.

Similarly, a hole 13c formed in the lower right corner of the side insulating plate 13 is aligned with a screw hole 26a of a mounting seat 26 protruding from the inner surface of the switch box 1 from the inside. The side insulating plate 13 is fixed to the switch box 1 by tightening bolts 28 from the side 13 via the flat washers 27. Similarly, on the inside of the rear surface of the switch box 1, side insulating plates 14, 15 for separating the rear surface of the switch box 1 from the inside movable contact 11 are attached. These side insulating plates 14 and 15 are also integrated in the same manner by bolts 31 and 32 and nuts 33 and 34, and then fixed to mounting seats 35 and 36 protruding from the switch box 1 by nuts 37 and 38. You. With these structures, it is possible to obtain required insulation properties.

[0005]

However, as described above, the mounting of the side insulating plate in the conventional switch box has to be performed by assembling the switch box divided into two parts using bolts and nuts. In addition, work performed using both hands in a narrow space has a problem that the work efficiency is extremely poor and the number of assembly steps is increased. The present invention has been made to solve the above problems, and an object thereof is to improve the workability of assembling in a switch box and reduce the number of assembling steps. A switch is provided.

[0006]

In order to achieve the above-mentioned object, the present invention provides a pole-mounted air switch in which insulating plates are disposed on upper and lower surfaces and front and rear surfaces in a switch box, respectively. The required minimum width for passing the open / close shaft from the round hole to the lower end is formed in the round hole required for the rotation of the open / close shaft
To form a notch consisting of a side insulating plate forming the step between the at least one side of the switching devoid other side of the upper end, is installed in the front and rear portions of the upper surface of the lower insulating plate, the side insulating plate An engaging projection formed with a discontinuous groove in the width direction to engage the left and right corners of the lower notch, and a step formed in the width direction of the front and rear portions of the upper insulating plate, An engaging groove that engages the protruding side portion and a horizontal female screw hole are formed in the upper part inside the switch box in the horizontal direction and a vertical female screw hole is formed, so that the upper insulating plate placed from above can be fixed with bolts And an upper insulating plate fixing seat.

[0007]

In the present invention, when assembling the insulating plate in the switch box, the lower insulating plate provided with the engaging protrusion is attached to the bottom of the switch box, and then the engaging protrusion on the lower insulating plate is mounted. The left and right corners of the notch below the side insulating plate are engaged with the engagement grooves. Then, the upper insulating plate is placed on the upper insulating plate fixing seat while the engaging groove of the upper insulating plate is engaged with the projecting portion of the step formed at the upper end of the side insulating plate, and the upper insulating plate is raised by the bolt. It is fixed to the insulating plate fixing seat.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an assembling procedure of a pole air switch according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the same embodiment, and FIG. FIG. In the figure, a lower insulating plate 41 is fixed by bolts 4 to mounting seats 2 arranged at the four bottom corners of the switch box 1, and engagement projections 4 are provided in front of the upper surface of the lower insulating plate 41 and near the rear end.
2, 43 are provided by integral molding. Engaging projection 4
The left and right grooves 42 and 43 have an intermediate portion divided therefrom.
a, 42b and grooves 43a, 43b, respectively. The shapes and dimensions of these grooves correspond to the shapes of the lower ends of side insulating plates 44 and 45 described later.

The lower ends of the side insulating plates 44 and 45 are engaged with the grooves 42 a to 43 b from above. Side insulation plate 4
4 , 45 are provided with notch portions 44a, 45a having the minimum width necessary for passing the opening / closing shaft 20 when the opening / closing shaft 20 is already incorporated in the switch box 1.
A notch consisting of a round hole sufficient for the opening / closing shaft 20 to rotate later.
The notches 44c and 45c are formed in a keyhole shape. The widths of the lower ends of the notches 44a and 45a are the lengths of the discontinuous portions between the grooves 42a and 42b and between the grooves 43a and 43b. The upper ends of the side insulating plates 44, 45 are notched at the left and right parts except the central part, and convex parts 44b, 45b are formed at the center. On the other hand, the front and rear of the right inner surface near the opening of the switch box 1 have fixed seats 46 made of L-shaped sheet metal,
47 is attached by welding with its tip horizontal. Further, screw holes 46a, 47a are formed in the horizontal portion at the distal ends of the fixed seats 46, 47 in the vertical direction.

The front and rear ends of the upper insulating plate 48 are placed on the upper surfaces of the fixed seats 46 and 47. At the front and rear ends of the upper insulating plate 48, the screw holes 46a, 47 of the fixing seats 46, 47
In positions corresponding to a, bolt insertion holes 48a, 48
b is formed. The protrusions 44b, 4 of the side insulating plates 44, 45 are located near the front and rear ends of the upper insulating plate 48.
At the position corresponding to 5b, grooves 48c and 48d having the same width as the thickness of the side insulating plates 44 and 45 are formed in the left-right direction, that is, the width direction of the side insulating plates 44 and 45. That is, the upper insulating plate 48 is placed on the fixed seats 46 and 47, and at the same time, the convex portions 44b and 4 are formed in the grooves 48c and 48d.
5b is engaged. Next, the upper insulating plate 48 is fixed by aligning the holes 48a, 48b with the screw holes 46a, 47a, and then tightening the bolts 49, 50 via the spring washers 51, 52 and the flat washers 53, 54.

Since the upper insulating plate 48 is fixed here, the side insulating plates 44 and 45 are not
a, 45a and the engagement protrusions 42, 43 restrict the movement in the front, rear, left and right and downward directions.
The forward, backward, right and upward movements are restricted by the engagement of the projections 44b and 45b with the projections 44b and 45b and the contact between the step on the right side and the upper insulating plate 48. That is, the side insulating plates 44,
45 is also fixed to the switch box 1. In this way, when assembling each insulating plate inside the switch box,
Since it is only necessary to fix the lower insulating plate 41 with four bolts and the upper insulating plate 48 with two bolts, a troublesome bolt tightening operation is reduced. In addition, since the bolt tightening work is a work of screwing into the screw hole from the upper side to the lower side, it can be performed with one hand, and the workability is improved.

In the embodiment, the convex portions 4 of the side insulating plates 44 and 45 are provided.
Only the right ends of 4b and 45b are the grooves 48 of the upper insulating plate 48.
c and 48d, but if the upper insulating plate 48 is widened to the left and the left ends of the grooves 48c and 48d are closed and the length of the grooves is made the same as the width of the protrusions 44b and 45b, the protrusions 44b and 4
The left end of 5b also comes into contact with the grooves 48c and 48d, so that movement in both the left and right directions can be restricted. In this embodiment, the side insulating plates 44 and 45 are
Although the left and right sides of the upper end are cut out to form b and 45b, the cutout may be only the right side. In the figure, 5 is a switch cover, 9 is an operation mechanism, 10 is an operation handle, and 11 is a movable contact.

Next, a second embodiment will be described. FIG.
FIG. 4 is a longitudinal sectional view showing a second embodiment. The feature of this embodiment is that lightning proof elements 56 to 58 are incorporated inside, and a side insulating plate is also provided between the movable contacts 11 to enhance interphase insulation. That is, the engagement protrusions 63 to 66 are arranged at equal intervals on the upper surface of the lower insulating plate 41, and
Grooves (not shown) are also formed in the upper insulating plate 62 corresponding to the engagement protrusions 63 to 66, and between the side insulating plates 67 to 7 are provided.
0 are respectively engaged and fixed. In addition, the engagement protrusion 63 ~
The engagement between the grooves of 66, the side insulating plates 67 to 70 and the upper insulating plate 62 is the same as that of the first embodiment. Also,
Since the structure of the other parts is the same as that of the first embodiment, the same parts are denoted by the same reference numerals and the description is omitted.

[0014]

As described above, according to the present invention, the side insulating plate is formed as an integral structure, and is supported and fixed by the lower insulating plate and the upper insulating plate. As a result, the number of parts is reduced and the number of attachment points is reduced, so that assembly is facilitated. As a result, the number of assembly steps is reduced. Also, according to the present invention, it is formed on the side insulating plate.
Notch for passing through the open / close axis
The minimum width required for
The edge is also kept sufficiently.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an assembling procedure of a first embodiment according to the present invention.

FIG. 2 is a cross-sectional view of the first embodiment.

FIG. 3 is a longitudinal sectional view of the first embodiment.

FIG. 4 is a longitudinal sectional view showing a second embodiment.

FIG. 5 is a cross-sectional view of a conventional example.

FIG. 6 is a longitudinal sectional view of a conventional example.

FIG. 7 is an exploded perspective view showing a conventional assembling procedure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Switch box 2 Mounting seat 4 Bolt 5 Switch lid 9 Operating mechanism part 10 Operating handle 11 Movable contact 20 Opening / closing axis 41 Lower insulating plate 42, 43 Engaging projection 42a, 42b, 43a, 43b Groove 44, 45 Side insulation Plates 44a, 45a Notch portions 44b, 45b Convex portions 44c, 45c Notch portions 46, 47 Fixing seats 46a, 47a Screw holes 48 Upper insulating plates 48a, 48b holes 48c, 48d Grooves 49, 50 Bolts 63 to 66 Engagement protrusions 62 Upper insulating plate

Claims (1)

(57) [Scope of request for utility model registration] 1. An on-pole air switch in which insulating plates are respectively disposed on upper and lower surfaces and front and rear surfaces in a switch box, wherein a round hole required for a rotation operation of a switch shaft is formed in a center portion , That
The minimum required to pass the open / close shaft from the round hole to the lower end
A side insulating plate formed by forming a notch having a small width and notching at least one side of an upper end to form a step between the other side; and a side insulating plate installed on front and rear portions of an upper surface of a lower insulating plate. An engaging projection formed with a discontinuous groove in the width direction for engaging the left and right corners of the lower notch portion, and a step formed in the width direction of the front and rear portions of the upper insulating plate, An engagement groove that engages the projecting side of the switch, and a horizontal female screw hole is formed in the upper part of the inside of the switch box in the horizontal direction, and the upper insulating plate placed from above is fixed with bolts. A pole-mounted air switch, comprising: a possible upper insulating plate fixing seat;