JPH017945Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a manual operating device for a switch, and particularly relates to a manual operating device having a structure that prevents the manual handle from being removed during opening/closing operations.

[Technical background and problems of the invention]

A manual operating device for a switch is used when the electric operating mechanism that opens and closes the switch loses power, and its structure generally involves inserting the manual handle into the shaft box of the mechanism and simultaneously inserting the manual handle into the manual shaft. The handle is engaged and connected to the switch main body via this shaft, and the switch main body can be turned on or off by rotating the handle.

However, since this type of manual handle can be inserted and removed freely, there is a risk that if it is accidentally removed during an opening/closing operation, the main circuit contacts may be left in an incomplete state.

[Purpose of invention]

An object of the present invention is to provide a highly safe manual operating device for a switch that prevents the manual handle from being removed during opening/closing operations.

[Summary of the idea]

The present invention is a switch equipped with a manual handle that is inserted into an axle box, engages with a manual shaft at the insertion position, and rotates the switch a predetermined amount of rotation to make and release the switch main body via the manual shaft. The manual operating device is characterized in that it is provided with a handle removal prevention mechanism that restricts the manual handle to the insertion position during the rotation operation and releases the restriction at the rotation operation start point and end point.

[Example of idea]

1 to 3, reference numeral 11 denotes a manual shaft, the lower end of which is connected to the switch main body 12, the upper end supported by an axle box 13, and a concave engaging portion 14 on the end surface. is provided. Reference numeral 15 denotes a removable manual handle that is inserted into the axle box 13 from the outside, and this manual handle 15 has a taper 1 at the insertion end.
6, and has a cylindrical hole 17 in the center and a convex engaging part 18 at the bottom, which engages with the end of the manual shaft 11 at the same time as it is inserted into the axle box. The coupling part 18 engages with the engagement part 14 of the manual shaft, and by rotating the manual handle 15 in one direction a predetermined number of times, the switch main body 12 is rotated, for example, to the closing position, and from that position in the opposite direction. They can each be operated in the cut-off operation. 21
is a manual handle removal prevention mechanism, and this handle removal prevention mechanism 21 is driven by a lever 25 attached to an auxiliary shaft 24 connected via a manual shaft 11, a pinion 22, and a sector gear 23 meshing with the manual shaft 11, and a predetermined rotational speed. The rotation angle is rotated, and the manual handle 15 is restrained at the insertion position in the middle of rotation,
The lock plate 2 forms a chevron shape with the lever 25 at the rotation start point and rotation end point to release the restraint.
It is equipped with 6. The lever 25 is interlocked with an auxiliary shaft 24 that rotates at a rotation angle reduced by a predetermined gear ratio with respect to the rotation speed of the manual shaft 11, and the lock plate 2
6 has oblong holes 27a at both ends as shown in FIG.
27b, one end of which is connected to the lever 25 via a pin 28 passing through the oblong hole 27a, and the other end is connected to the radial axis 29 connecting the centers of the manual shaft 11 and lever 25 and the outside of the axle box 13. A fixing pin 30 and an oblong hole 2 provided on vertical axes that intersect in the vicinity
7b, and the tip of the fixed pin protrudes into the through hole 31 provided in the axle box 13, and as the lever 25 rotates, one of the fixed pins shown by the solid line distributed with respect to the radial axis 29 It rotates from the mountain-shaped rotation position via a straight line to the other rotation position shown by the dotted line in the mountain shape or in the opposite direction by a predetermined rotation angle. On the other hand, an annular groove 32 is provided on the outer peripheral surface of the axle box insertion part of the manual handle 15, and the lock plate 26 is tensioned between the fixed pin 30 and a pin 33 installed on the lower surface near the lever 25. A spring 34 is tensioned and constantly receives spring force in the direction of the axle box. The structure of the switch main body 12 is connected to a shaft 39 having a bevel gear 38 via a bevel gear 37 that engages with a bevel gear 36 of the manual shaft 11. Further, a pinion 40 provided at the tip of the shaft 39 opens and closes the opening/closing portion 41 of the switch main body 12. That is, the pinion 40 engages with the rack 43 provided on the movable side electrode 42 and rotates the manual shaft 11, thereby rotating the shaft 39 via the bevel gears 36, 37, 38, and the pinion 40 and the rack 43 move the movable side. The electrode 42 is driven and operated. In FIG. 1, the switch main body 12 is shown in an open state.

Next, the operation of the above device will be explained. When manually operating the switch main body 12, when the manual handle 15 is inserted into the shaft box 13 as described above, the manual shaft 11 and the engaging portions 14, 18 of the manual handle 15 are engaged with each other at the insertion position. Next, manual handle 15
By rotating the switch in one direction a predetermined number of times, the switch main body 12 can be moved, for example, to the closed position, and by subsequently rotating the manual handle in the opposite direction, the switch main body 12 can be moved to the closed position.

When the manual handle 15 is only inserted into the axle box 13, that is, at the starting point of the rotation operation, the lock plate 26 is rotated along the radial axis 29 with the fixed pin 30 as the fulcrum.
The lock plate 26 is connected to the lever 25 at the position indicated by the solid line in the figure, rotated in one direction relative to the lock plate 26. Therefore, the lock plate 26 resists the spring force by the play of the oblong holes 27a and 27b and moves toward the lever 25. The tip end on the side of the fixing pin 30 is located outside the annular groove 32 of the manual handle, so that the manual handle 15 can be freely inserted into and removed from the axle box 13. For example, if this position is assumed to be the closing position and the handle is rotated in the pulling direction from this position, the lock plate 26 is moved from the position shown by the solid line to the position shown by the dotted line with respect to the radial axis 29 by the lever 25 that interlocks with the manual shaft 11. It is rotated, but in this rotation stroke, the rotation angle is at the midpoint (see Figure 3).
Oval holes 27a, 27 due to spring force
It is pulled toward the axle box by the amount of play b, and its tip enters the annular groove 32 of the manual handle, thereby restraining the handle at the insertion position. When the lock plate 26 further rotates past the intermediate point (axis 29) and continues to rotate, the lever 25 again pulls the axle box in the opposite direction against the spring force, and the lock plate is locked at the end point of rotation shown by the dotted line. The tip of the handle 26 comes off the annular groove 32 of the manual handle, and the handle 15 can be freely inserted and removed.

[Effects of the invention] As described above, the present invention is inserted into the axle box, engages with the manual shaft at the insertion position, and rotates at a predetermined number of revolutions to close or close the switch main body via the manual shaft. In a manual operating device equipped with a manual handle that can be freely inserted and removed to be moved to a disconnected position, the manual handle is restrained in an inserted position during a rotational operation, and is released from the restraint at a starting point and an end point of the rotational operation. Since the handle is provided, the handle will not be removed during the opening/closing operation, and there is no danger that the main circuit contacts will be left in an incomplete state, significantly increasing safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a manual operating device for a switch according to the present invention, and FIGS. 2 and 3 are plan views showing the operating state of the manual operating device. 11...Manual shaft, 12...Switch main body, 13...
...Axle box, 15...Manual handle, 21...Handle removal prevention mechanism, 22...Pinion, 23...
Sector gear, 24...Auxiliary shaft, 25...Lever, 2
6...Lock plate, 27a, 27b...Oval hole, 28...Pin, 30...Fixing pin, 32...
Annular groove, 33... pin, 34... tension spring.

Claims (1)

[Scope of utility model registration request] Equipped with a removable manual handle that is inserted into the axle box, engages with the manual shaft at the insertion position, and rotates the switch a predetermined number of times to close and disconnect the switch main body via the manual shaft. , an annular groove provided on the outer circumferential surface of the axle box insertion part of the manual handle, a through hole in the axle box that communicates with the annular groove, a pinion attached to the manual shaft, and a sector gear that meshes with the pinion. an auxiliary shaft, a lever attached to the auxiliary shaft, an oblong hole at both ends, one end connected to the lever via a pin passing through the oblong hole, and the other end connected to the manual shaft and lever. Connected via an oblong hole to a fixing pin provided on a vertical axis that intersects the radial axis connecting the centers near the outside of the axle box, and other than the rotation start and end points of the lever, the fixed pin side tip The portion protrudes into the annular groove through a through hole provided in the axle box, and as the lever rotates, the chevron formed together with the lever is moved in the opposite direction via a straight line with respect to the radial axis. A switch comprising: a lock plate forming a chevron shape; a pin installed on the lower surface of the lock plate; and a tension spring that engages with the pin and the fixing pin to pull the lock plate toward the axle box. manual operating device.