JPH0682736U - Manual switch operation mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve safety by preventing the movable contact from stopping midway when opening the switch. [Structure] The lever 23 connected to the handle 1 pivotally supports a rod 6 by a pin 4 parallel to the handle shaft 2 at one end, and a pin 25 fitted to a long hole 31 substantially parallel to the circumferential direction at the other end. So that the rod 26 is pivotally supported. The rod 6 is fitted with the spring 7 on the outer side, and the rod 26 is fitted on the outer side with the spacer 3
The springs 27 and 29 are fitted in series via 2 and both ends are slidably supported by the pins 8 and 28. A drive plate 21 for driving the main contact 9 is rotatably fitted to the other end of the handle shaft 2, and a return spring 33 is interposed between the drive plate 21 and the lever 23. A recess 21a is formed in the outer peripheral portion of the drive plate 21 and the pin 4 is engaged therein. Similarly,
A protrusion 21b for engaging the pin 25 is formed on the outer periphery of the drive plate 21 and on the counterclockwise side of the pin 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a manual operation mechanism for a switch such as an air switch for a pole.

[0002]

[Prior art]

 A conventional manual operating mechanism for a pillar-mounted air switch is configured as shown in FIGS. 8 and 9. In the figure, reference numeral 1 is a handle for operation, and when the handle 1 is manually rotated, the lever 3 is rotated via a handle shaft 2 to which the handle 1 is fixed. The lever 3 pivotally supports rods 6 and 6 by pins 4 and 5 at both ends. Springs 7, 7 are fitted on the outer sides of the rods 6, 6, and the ends thereof are slidably supported by being inserted through pins 8, 8 having sliding holes. The lever 3, the pins 4, 5, the rod 6 and the spring 7 form a toggle mechanism.

A drive plate 11 connected to a drive shaft 10 for driving a main contact (movable contact) 9 is rotatably fitted to the other end of the handle shaft 2 so as to be interposed between the drive plate 11 and the lever 3. A return spring 12 is interposed in the. A recess 11a is formed in the outer peripheral portion of the drive plate 11, and the pin 4 is engaged therein. The clockwise rotation of the drive plate 11 is stopped by the stopper 14 as shown in FIG. Further, the counterclockwise rotation of the lever 3 is stopped by the stopper 13 after being largely rotated from the position shown in FIG.

In this manual operation mechanism, when the main contact 9 is opened, it is operated as shown in FIGS. That is, when the handle 1 is manually rotated in the counterclockwise direction to open the main contact 9, the lever 3 pushes the rods 6 and 6 to the outside to open the springs 7 and 7 as shown in FIG. Rotate while compressing. At this time, the drive plate 11 is still in contact with the stopper 14. Further, when the handle 1 is rotated counterclockwise, the pin 4 comes into contact with the end of the recess 11a formed on the outer periphery of the drive plate 11, and as shown in FIG. 11, the drive plate 11 and the drive shaft 10 are rotated. Rotate clockwise. As a result, the main contact 9 is released from the fixed contact 15 and opened.

When the main contact 9 comes off from the fixed contact 15, the main contact 9 and the drive plate 11 are further rotated counterclockwise by the spring force of the return spring 12 as shown in FIG. When the handle 1 is further rotated and the rods 6 and 6 pass the straight line on the horizontal axis, the restoring force of the springs 7 and 7 facilitates counterclockwise rotation of the lever 3 as well. .

[0006]

[Problems to be solved by the device]

 However, in the above-described conventional manual operation mechanism, when the main contact 9 is pulled out from the fixed contact 15 and separated from the fixed contact 15, the rotation of the handle 1 is directly transmitted to the drive plate 11 to rotate the drive shaft 10. As a result, the main contact 9 comes out of the fixed contact 15. Therefore, if the handle operation is stopped immediately before or immediately after the main contact 9 comes out of the fixed contact 15, that position will be maintained. As a result, if there is a slight misalignment of the positions of the main contacts of the three phases, there will be both open and closed phases.

As described above, if it is possible to stop the operation handle at an intermediate position during the manual opening operation, an open phase accident may occur or an accident may occur during hot line construction. was there. The present invention has been made to solve the above problems, and an object thereof is to improve safety by preventing the movable contact from stopping midway when manually opening the switch. It is to provide a manual operation mechanism for a switch.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is to connect a pair of rods in a radial direction through a pin parallel to the handle shaft to both ends of a lever whose center is fixed to the handle shaft, and to connect both rods by a spring. A toggle mechanism that pushes in the pin direction, and a recess that is supported by the handle shaft in the vicinity of the lever and that engages with one pin of the lever are formed on the outer peripheral part and that is connected to the drive shaft of the movable contact. In the manual operation mechanism of the switch including the plate, a long hole that is substantially parallel to the circumferential direction is formed as the other pin hole of the lever, and the other pin is engaged with the outer peripheral portion of the drive plate. The feature is that a joint is formed.

[0009]

[Action]

 In the present invention, the other pin connecting the rod and the lever is fitted into the elongated hole formed in the lever substantially parallel to the circumferential direction, thereby rotating the handle shaft and stabilizing one of the toggle mechanisms. When the long hole tilts in the extension direction of the rod beyond the intermediate dead point when switching from the state to the other stable state, the other pin pressed by the rod starts sliding along the long hole and drives. The drive plate is momentarily rotated by contacting the engaging portion of the plate. As a result, the movable contact that is being opened is pulled out from the fixed contact without stopping in the middle.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is an explanatory view showing the construction of an embodiment of a manual operation mechanism for a switch according to the present invention, and FIG. 2 is a transverse sectional view of FIG. In both figures, 1 is a handle for operation, and when the handle 1 is manually rotated, the lever 23 is rotated via the handle shaft 2 to which the handle 1 is fixed. The lever 23 pivotally supports the rod 6 by a pin 4 parallel to the handle shaft 2 at one end, and pivotally supports the rod 26 by a pin 25 fitted in a long hole 31 formed substantially parallel to the circumferential direction at the other end. is doing.

A spring 7 is fitted on the outside of the rod 6, and an end portion of the rod 6 is inserted into a pin 8 having a sliding hole and is slidably supported. Springs 27 and 29 are fitted in series on the outside of the rod 26 via a spacer 32, and the end portion of the rod 26 is slidably supported by being inserted into a pin 28 having a sliding hole. The lever 23, the pins 4 and 25, the rods 6 and 26, the springs 7, 27 and 29, and the like form a toggle mechanism. A drive plate 21 connected to a drive shaft 10 that drives a main contact (movable contact) 9 is rotatably fitted to the other end of the handle shaft 2.

A return spring 33 is interposed between the drive plate 21 and the lever 23. A recess 21a is formed on the outer peripheral portion of the drive plate 21 and the pin 4 is engaged therein. Similarly, a protrusion 21b for engaging the pin 25 is formed on the outer peripheral portion of the drive plate 21 on the counterclockwise side of the pin 25. The clockwise and counterclockwise rotation of the drive plate 21 is restricted by the stopper 13. When the main contact 9 is opened by the manual operation mechanism of this embodiment, the operation is performed as shown in FIGS.

That is, as shown in FIG. 3, when the handle 1 is manually rotated counterclockwise to open the main contact 9, the lever 23 pushes the rods 6 and 26 to rotate the springs 7, 27, and 27. 29 is rotated while being compressed. At this time, the drive plate 21, which is connected to the lever 23 via the return spring 33, tries to rotate the main contact 9 in the counterclockwise direction in cooperation with the lever 23. However, since the sliding resistance between the main contact 9 and the fixed contact 15 is large, the drive shaft 10 and the drive plate 21 supporting the main contact 9 cannot rotate and only the return spring 33 deforms. The drive plate 21 remains in contact with the stopper 13.

Next, as shown in FIG. 4, when the handle 1 is continuously rotated in the counterclockwise direction, the pin 4 comes into contact with the end of the recess 21 a formed on the outer periphery of the drive plate 21 and directly drives the drive plate. 21 and the drive shaft 10 are rotated counterclockwise. As a result, the main contact 9 comes out partway through the fixed contact 15. Here, as shown in FIG. 5, as the lever 23 rotates, the direction of the elongated hole 31 inclines toward the extending direction of the rod 26, and the pin 25 locked at the lower end position of the elongated hole 31 is loaded into the rod 25. It is pushed by 26 and starts sliding upward in the long hole 31. While being pressed by the springs 27 and 29, the pin 25 abuts the projection 21b of the drive plate 21 while the pin 25 rapidly moves toward the upper end of the elongated hole 31.

Next, as shown in FIG. 6, when the protrusion 21 b is impacted and pressed by the pin 25, the drive plate 21 rotates counterclockwise, and the main contact 9 is completely removed from the fixed contact 15. As a result, the main contact point 9 loses the sliding resistance with the fixed contact point 15 up to that point, so that the restoring force of the return spring 33 that has been deformed up to that point is released, and the rotation of the drive plate 21 and the drive shaft 10 is correspondingly increased. As the movement progresses, the main contact 9 is further separated from the fixed contact 15. Further, as shown in FIG. 7, when the lever 23 is continuously rotated in the counterclockwise direction together with the handle 1, the pin 4 descends and the rod 26 becomes horizontal, and further the lower right position is obtained.

Then, the spring force of the spring 7 which has been compressed until then is released, and the lever 23 is rotated counterclockwise until it abuts on the stopper 13. As a result, the pin 4 of the lever 23 engaged with the recess 21a of the drive plate 21 moves to the counterclockwise end of the recess 21a, and the drive plate 21 is counterclockwise by pressing the end. Is rotated in the direction. With the rotation of the drive plate 21, the drive shaft 10 is also rotated, and the main contact 9 is further rotated to the open side, and the opening operation is completed.

As described above, in the manual operation mechanism of the embodiment, the elongated hole 31 is formed in the lever 23 and the one pin 25 is locked, so that the continuous rotation operation applied to the lever 23 is The rotation output to the drive plate 21 side is discontinuous and pulsating. By matching the contact and separation positions of the main contact 9 and the fixed contact 15 within the range of the most rapidly rotating angle, the unstable intermediate stop in the opening operation of the switch is eliminated, and the phase failure occurs. It is possible to prevent and improve safety in hot line construction.

[0018]

[Effect of device]

 As described above, according to the present invention, by making one of the pin holes in which the rod that constitutes the toggle mechanism is axially supported an elongated hole, the movable contact momentarily rotates during the operation of the handle to move the movable contact. The contact is securely pulled out from the fixed contact. As a result, even if the manual opening operation is stopped midway, the movable contacts will not be stopped in the minute sections before and after opening, eliminating the open phase accident during opening and closing operations and at the same time performing live line construction work. The safety in the case is improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment according to the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is an operation explanatory diagram of the embodiment.

FIG. 4 is an operation explanatory diagram of the embodiment.

FIG. 5 is an operation explanatory diagram of the embodiment.

FIG. 6 is an operation explanatory diagram of the embodiment.

FIG. 7 is an operation explanatory diagram of the embodiment.

FIG. 8 is an explanatory diagram showing a conventional example.

FIG. 9 is an explanatory diagram showing a conventional example.

FIG. 10 is an operation explanatory diagram of a conventional example.

FIG. 11 is an operation explanatory diagram of a conventional example.

FIG. 12 is an operation explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Handle 2 Handle Shaft 4 Pin 6 Rod 7 Spring 8 Pin 9 Main Contact 10 Drive Shaft 13 Stopper 15 Fixed Contact 21 Drive Plate 21a Recess 21b Protrusion 23 Lever 25 Pin 26 Rod 27 Spring 28 Pin 29 Spring 31 Long Hole 32 Spacer 33 Return spring

Claims (1)

[Scope of utility model registration request] 1. A toggle mechanism for radially connecting a pair of rods to both ends of a lever whose center is fixed to a handle shaft through pins parallel to the handle shaft and pressing both rods in a pin direction by a spring. And a drive plate which is formed in the outer peripheral portion in the vicinity of the lever and is axially supported by the handle shaft and engages with one pin of the lever, and which is also connected to the drive shaft of the movable contact. In the manual operation mechanism, an elongated hole substantially parallel to the circumferential direction is formed as the other pin hole of the lever, and an engaging portion for engaging the other pin is formed on the outer peripheral portion of the drive plate. Manual switch mechanism for the switch.