JPS621705Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved opening/closing holding device for holding the rod of an operating device for operating an opening/closing portion in an open or closed position.

FIG. 1 shows a conventional opening/closing holding device that operates a contact that can be connected and separated in a switching section and holds the operating mechanism when the switching section is in the open or closed state in a switching device such as a disconnector or a disconnector. Shown below. As shown in the figure, an operating device 2 and an opening/closing holding device 3 are sequentially attached to a container 1 of the opening/closing device in the axial direction. The operating device 2 consists of a cylinder 5 and a piston 6. A piston rod 7 attached to one side of the piston 6 is inserted into the container 1 through a seal 8 in an airtight and slidable manner. The operating rod 9 is connected to the movable part of the opening/closing part via the operating rod 9 and the connecting part 10. Furthermore, piston 6
A rod 11 fixed to the other side is integrally joined to the opening/closing holding device 3.

This opening/closing holding device 3 is connected to a tip 12 of a rod 11.
A protrusion is formed in a direction perpendicular to the lever 13, which is rotatable via pins 12a, 12a.
13, and these levers 13, 13 are connected to pin 1.
It is connected to arms 14, 14 via 3a, 13a. The arms 14, 14 are connected via pins 15a, 15a to fixed arms 15, 15 fixed to the lid 5a of the operating device 2, and a tension spring 16 is connected between the pins 13a, 13a. A connecting rod 17 is fixed coaxially to the tip end 12 of the rod 11, and one side of the connecting rod 17 and the other side are connected to a manual operation mechanism section or an opening/closing display device 18, which is shown in dashed lines.

FIG. 1 shows the closed operating state. In this closed state, due to the tensile force of the tension spring 16,
The tip end 12 of the rod 11 is maintained in a closed state, that is, pressed toward the left side in the figure, and the rod 11 is held so as not to move unless the operating device 2 is operated. Similarly, in the opening operation, the rod 11 is reversed to the right side in the figure and is moved by the tensile force of the tension spring 16.
is maintained in a state where it is pressed to the right side in the figure, and maintains an open operating state.

However, the conventional opening/closing holding device 3
provided adjacent to the outer axial operating device 2 of the
Also, on the same axis is a manual operation mechanism section or an opening/closing display device 1.
8, there were problems that should be improved, such as the opening/closing device becoming longer in the axial direction of the container 1 and the resistance of the opening/closing holding device 3 being large at the beginning of the opening/closing operation.

This invention was made in consideration of the above points,
The purpose is to reduce the axial length of the opening/closing device to reduce the installation space, and to provide an opening/closing holding device that does not impede the opening/closing operation force.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings in which the same parts as in FIG. 1 are denoted by the same reference numerals. Second
In the figure, an operating device 2 is provided in the outer axial direction of a container 1 of the opening/closing device. This operating device 2 is a cylinder 5
and a piston 6, and the piston rod 7 fixed to the piston 6 has a sealing part 8 inside the container 1.
The piston rod 7 is hermetically and slidably inserted through the piston rod 7, and the piston rod 7 is connected to a movable portion of an opening/closing portion (not shown) through an operating rod 9 and a connecting portion 10. Inside the container 1, an opening/closing holding device 20 is provided which cooperates with the piston rod 7.

As shown in FIGS. 2 and 3, the opening/closing holding device 20 has a shaft 22 fixed to one end of a swinging lever 21, and this shaft 22 is disposed within the container 1 in a positional relationship that is substantially orthogonal to the piston rod 7. . Then, the shaft 22 is hermetically inserted into the bearing portion 23. The swing lever 21 is attached so that it swings parallel to the piston rod 7. A rod-side metal fitting 2 is attached to the connecting portion 10 between the piston rod 7 and the operating rod 9.
5 is attached, and the rod-side metal fitting 25 and the intermediate portion of the swing lever 21 are movably connected by a connecting lever 26 via pins 26a and 26b, respectively. The swing lever 2 on the opposite side of the shaft 22 of the swing lever 21
A rotary pin 27 is provided at the tip of 1. A cam engaging portion 28 that engages with this rotating pin 27 is provided. The engaging portion 28 includes a cam lever 30 having a chevron-shaped cam portion 29 that engages with the rotating pin 27, and a support fitting 32 that movably supports the cam lever 30 via a pin 31.
and a compression spring 33 that constantly presses the cam lever 30.
The cam lever 30 is inserted into the slot of the support fitting 32 so as to be sandwiched therebetween, and the cam lever 30 is pressed by the compression spring 33 by the bottom 32a and corner part 32b of the slot, and the pin 3 is pressed by the compression spring 33.
The range of rotation around 1 is limited. In addition,
A manual operation mechanism section or an opening/closing display device 18 (see FIG. 3) shown by a dashed line can be attached to a portion of the shaft 22 that projects outside the container 1.

Next, the effects of the present invention configured as described above will be explained. In the illustration, the opening/closing section is shown in a closed state. Closed space 6a of cylinder 5 of operating device 2
When either side of the open side space 6b is filled with air from an air tank (not shown), the piston 6 moves to the open side or the close side, and the contacts of the opening/closing part perform opening/closing operations.

Now, when the piston 6 of the operating device 2 is operated by an opening operation, the piston 6 moves to the right in the figure.
As the piston 6 moves, the piston rod 7 moves to the right in the figure. Further, as the piston rod 7 moves, the swing lever 21 is pushed to the right in the figure via the rod-side metal fitting 25 and the connecting lever 26. When the swing lever 21 is pushed to the right, the rotation pin 27 pushes the cam lever 30 downward in the drawing via the chevron-shaped cam portion 29. The cam lever 30 is pressed upward by the compression spring 33, but when the chevron-shaped cam portion 29 is pressed by the rotation pin 27, the cam lever 30
The rotating pin 27 is attached to the left closing side inclined part 29
From a, the swing lever 21 passes over the peak of the chevron-shaped cam portion 29 and moves to the opening side slope portion 29b on the right side, and the swing lever 21 swings to the right side together with the piston rod 7.

During the closing operation, the swing lever 21 returns to the state shown in FIG. 2 in substantially the same manner as described above.

In this way, when there is no opening or closing operation, the swing lever 21 is stopped on either the left or right side of the chevron-shaped cam portion 29, and the operating force is not greater than the pressing force of the compression spring 33. , the piston rod 7 is in a held state. Since the force held by this opening/closing holding device 20 is the pressing force of the compression spring 33 that presses the chevron-shaped cam portion 29, the resistance against the piston rod 7 by the opening/closing holding device 20 at the beginning of the opening or closing operation is reduced compared to the conventional one. be done.

Further, since the opening/closing holding device 20 is housed inside the container 1, the length of the container 1 in the axial direction is shorter than that of the conventional device. Furthermore, the shaft 2 of the swing lever 21
The rotation of 2 is led out from the side of the container 1, and the manual operation mechanism section or opening/closing display device 1 is shown by a dashed dotted line.
8, the axial length of the opening/closing device can be further reduced than before.

As described above, according to the present invention, the opening/closing holding device that engages with the piston rod is housed inside the container, the shaft of the swinging lever is led out from the side of the container, and the manual operation mechanism or opening/closing display is attached to this shaft. The opening/closing holding device is connected to swing with the movement of the piston rod, and is configured to press a cam lever having a chevron-shaped cam portion that engages with a rotating pin provided at one end of the swing lever via a compression spring. By configuring the opening/closing device as shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional opening/closing holding device, FIG. 2 is a side sectional view of an opening/closing holding device according to an embodiment of the present invention, and FIG. 3 is a plan sectional view of FIG. 2. 1... Container of opening/closing device, 2... Operating device, 7...
...Piston rod, 9...Operation rod, 18...
Manual operation mechanism section or opening/closing display device, 20... Opening/closing holding device, 21... Rocking lever, 22... Shaft, 27... Rotating pin, 29... Chevron cam part, 2
9a...Close side slope part, 29b...Open side slope part, 3
0...Cam lever, 33...Compression spring.

Claims (1)

[Scope of utility model registration request] An operating device consisting of a cylinder and a piston, which is connected to a piston rod fixed to the piston and a movable side of the opening/closing section, and holds the piston rod in either the open or closed state of the opening/closing section. The piston rod is inserted into the container in an airtight and slidable manner, and one end of the piston rod is connected to the piston of the operating device disposed in the outer axial direction of the container, and one end is connected to the container wall. A swinging lever is disposed through a shaft inserted and fixed, the middle of the swinging lever and the piston rod are movably connected via a connecting lever, and a rotation pin is attached to the other end of the swinging lever, A cam lever having a chevron-shaped cam portion that engages with the rotary pin is provided, one end of the cam lever is rotatably fixed, and the chevron-shaped cam portion presses the rotary pin via a compression spring to open or close the piston rod. According to the swinging movement of the swinging lever in accordance with the movement accompanying the operation, the rotating pin is pressed and moved to either the opening or closing side of the chevron-shaped cam portion, and the piston rod is moved through the swinging lever. An opening/closing holding device, characterized in that the rotating movement of the shaft fixed to the swinging lever is guided to the outside of the container.