JPH0670139U - Switch locking device - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a lock device for a switch, which does not require a large force to be applied to the lock mechanism and does not require a strong lock mechanism. [Structure] A locking handle 11 is inserted through a cylindrical fixing member 10, and a locking plate 13 is rotatable at the tip of the locking handle 11.
To connect. The cylinder lock 12 is hung in the through hole 10b of the fixing member 10 and the through hole of the lock handle 11 when unlocked. When the lock 12 is removed and the lock handle 11 is pulled, the lock plate 13 is released. The shutter 17 and the clutch levers 21 to 23 are sequentially rotated, and the clutch lever 2
2, 23 and the reduction gear 26 are disengaged, the rotation of the motor 25 is not transmitted to the gear 27 through the reduction gear 26, and the electric operation is disabled. When the locking plate 13 is rotated, the manual handle insertion portion 28a provided on the gear 28 is closed by the locking plate 13, and the manual operation becomes impossible.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking device for a switch such as a disconnector used in a substation or the like.

[0002]

[Prior art]

 FIG. 6 and FIG. 7 are front views showing an unlocked state and a locked state in a conventional locking device for a switch, in which a notch portion 2a, 2b is provided on a main shaft 1 which connects a switch and an operating device (not shown). The lever 2 having the above is fixed, and the main shaft 1 and the lever 2 are housed in the cover 3. A lock pin 4 is slidably penetrated through the cover 3, and an inner end 4a of the lock pin 4 is disengageably engaged with notches 2a and 2b of the lever 2 to restrict the rotation of the main shaft 1. Further, a display projection 5 is provided upright on the outer end 4b of the locking pin 4.

The support member 6 is fixed to the outside of the cover 3 and has an elliptical hole 6a into which the display protrusion 5 is inserted. Further, the shutter 7 having the upper end rotatably attached to the support member 6 is provided with display holes 7a and 7b for the display projection 5 to project. Reference numeral 8 is a padlock that locks the opening and closing of the shutter 7.

Next, the operation of the above conventional device will be described. In FIG. 6, a switch (not shown) is in the open state, and the switch is closed by rotating the main shaft 1 in the clockwise direction. On the other hand, the locking device is in the unlocked state, that is, the inner end 4a of the locking pin 4 is not engaged with the notch 2a of the lever 2, and the main shaft 1 is rotatable. Further, the display protruding portion 5 protrudes from the display hole 7b of the shutter 7 and indicates that it is in the unlocked state. The shutter 7 is locked to the support member 6 by the padlock 8 and the display protrusion 5 protrudes from the display hole 7b. Therefore, the lock pin 4 cannot move inward, and it cannot be accidentally locked. Absent.

Next, in order to prevent the switch from being erroneously operated at the time of maintenance and inspection, the locking device has to be changed from the unlocked state shown in FIG. 6 to the locked state shown in FIG. Therefore, first, the padlock 8 is unlocked and the shutter 7 is rotated upward. As a result, the engagement between the display protrusion 5 and the display hole 7b is released, and the locking pin 4 can be moved. Therefore, the locking pin 4 is pushed inward, the inner end 4a is engaged with the notch 2a of the lever 2, and the switch is locked.

After that, when the shutter 7 is rotated downward, the display protrusion 5 engages with the display hole 7 a, and the shutter 7 is locked by the padlock 8. As a result, the lock state is displayed and the lock pin 4 cannot be moved.

[0007]

[Problems to be solved by the device]

 However, in the conventional lock device for a switch described above, when the main shaft 1 is mistakenly rotated to close the switch in the locked state shown in FIG. 7, a large load is applied to the lock pin 4. , The locking pin 4 and its support mechanism had to be solid.

The present invention has been made to solve the above problems, and does not apply a large force to the locking mechanism, so that the locking mechanism does not need to be strong. The purpose is to get equipment.

[0009]

[Means for Solving the Problems]

 A lock device for a switch according to the present invention includes a manual handle insertion portion provided in a gear mechanism that transmits the output of a reduction mechanism that reduces the rotation of a motor to a drive mechanism, and two through holes that are aligned in the longitudinal direction. An installed cylindrical fixing member, a locking handle that is inserted into the fixing member and has a through hole, and that is moved during unlocking and locking, and a locking handle during unlocking and locking And the lock that is hung through the through hole of the fixing member and the through hole of the locking handle and the other through hole of the locking member, respectively, and rotatably supported and at one end of the locking handle. The lock plate is connected and has a manual handle insertion port at the same position as the manual handle insertion part when unlocked, and rotates when locking to block the manual handle insertion part, and for rotation of the locking plate when locking. A link that interlocks to cut off the connection between the motor and the gear mechanism. It is provided with a blocking means.

[0010]

[Action]

 In this invention, when the lock is released and the lock handle is pulled in the unlocked state, the lock plate is rotated, and the connection between the motor and the gear mechanism is disconnected by the connection disconnecting means interlocking with the lock plate. It becomes impossible. At the same time, the manual handle insertion part provided in the gear mechanism is blocked by the locking plate, and manual operation becomes impossible.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are perspective views showing an unlocked state and a locked state of an internal structure of a circuit breaker operating device (including a locking device) according to this embodiment, and FIGS. It is a front view showing an unlocked state and a locked state of the locking device. FIG. 5 is a front view of the operating device for the circuit breaker. In the figure, 9 is an operation box, and 10 is a fixing member attached to the outside of the operation box 9, and has a locking through hole 10a and an unlocking through hole 10b. Reference numeral 11 denotes a lock handle that is inserted through the operation box 9 and the fixing member 10 and also has a through hole. Reference numeral 12 is a cylinder lock inserted into either one of the through holes 10a and 10b and the through hole of the locking handle 11.

One end of a rectangular locking plate 13 is rotatably connected to the inner end of the locking handle 11, and the locking plate 13 rotates about a rotation shaft 14. Reference numeral 15 is a stopper of the locking plate 13, and 16 is a return spring of the locking plate 13. Reference numeral 13a denotes a manual handle insertion opening provided on the lock plate 13, which is located at the same position as the manual handle insertion portion 28a when unlocked. A shutter 17 is rotatably supported by a rotary shaft 18, and has a shutter portion 17a that covers the manual handle insertion opening 13a in the unlocked state. Reference numeral 19 is an engagement pin for engaging with the lock plate 13 provided upright on the shutter 17.

Reference numerals 21 to 23 denote first to third clutch levers each having a center portion rotatably supported, and an engagement pin 24 engaging with the shutter 17 is provided at one end of the first clutch lever 21. It is erected. Further, the clutch lever 21 is engaged with the engagement pins 22a and 23a of the clutch levers 22 and 23. Reference numeral 25 is a motor, and 26 is a speed reducer having a harmonic drive mechanism whose central portion (wave generator) is connected to the motor 25. Engagement pins 26a and 26b are erected on the outer peripheral side portion (circular spline). One end of each of the second and third clutch levers 22 and 23 is engaged with the engaging pins 26a and 26b. Reference numeral 27 is a first gear connected to an intermediate portion (flex spline) of the speed reducer 26, and 28 and 29 are second and third gears that are successively meshed with the first gear 27, respectively. A manual handle insertion portion 28 a is formed at 28. A drive screw portion 30 is attached to the third gear 29, and a screw member 33 integrated with a drive lever 32 fixed to the rotating shaft 31 is screwed to the drive screw portion 30 to attach to the rotating shaft 31. The operating lever 34 is attached to the operating lever 34, and the disconnecting portion 35 is connected to the operating lever 34.

Next, the operation of the disconnecting switch operating device will be described. First, in the unlocked state shown in FIGS. 1 and 3, the rotation of the motor 25 is reduced by the speed reducer 26, transmitted to the drive screw portion 30 via the gears 27 to 29, and caused by the rotation of the drive lever 32. The operation lever 34 is rotated via the rotation shaft 31, and the disconnecting portion 35 is opened / closed. Even in the unlocked state, the manual handle insertion opening 13a is closed by the shutter 17a, but the manual handle can be inserted into the insertion opening 13a by lifting the engagement pin 19 and rotating the shutter 17. Therefore, the manual operation of the gear 28 is also possible by inserting the manual handle into the insertion portion 28a.

Next, in order to change the unlocked state of FIGS. 1 and 3 to the unlocked state of FIGS. 2 and 4, first, the cylinder lock 12 is removed, and the locking handle 11 is pulled to pull out the through hole and the chain. The cylinder lock 12 is hung through the locking through hole 19a. At this time, the lock plate 13 rotates to push up the engaging pin 19, so that the shutter 17 also rotates, and the first clutch lever 21 rotates via the engaging pin 24, and the engaging pin 22a, Since 23a is engaged with the clutch lever 21, the second and third clutch levers 22 and 23 are also rotated to be disengaged from the engaging pins 26a and 26b. Therefore, even if the motor 25 is erroneously driven, the rotation of the motor 25 is not transmitted to the gear 27 through the reduction gear 26 and the electric operation is not performed. Further, since the manual handle insertion portion 28a of the gear 28 is closed by the locking plate 13, no manual operation is performed.

When returning to the unlocked state again, when the cylinder lock 12 is removed, it is pulled by the return spring 16 and the locking plate 13 rotates and stopped by the stopper 15, and the locking handle 11 moves inward. Be drawn into. Therefore, the cylinder lock 12 is hooked through the through hole of the lock handle 11 and the through hole 10b for unlocking. As a result, the state shown in FIGS. 1 and 3 is obtained.

In the above-described embodiment, the manual handle cannot be inserted in the locked state, and the rotation of the motor 25 is not transmitted to the drive mechanism. Therefore, a large force is not applied to the drive mechanism and the lock mechanism. , Need not be solid. Further, depending on which of the through holes 10a and 10b the cylinder lock 12 hangs on, it is possible to indicate whether it is unlocked or locked.

[0018]

[Effect of device]

 As described above, according to the present invention, since the connection between the motor and the gear mechanism is cut off during locking, electric operation cannot be performed, and the manual handle insertion portion provided on the gear is also blocked by the locking plate. Manual operation is also impossible. Moreover, the rotational force of the motor is not transmitted to the mechanism after the gear mechanism, and even the manual handle cannot be inserted, so a large force is not applied to the drive mechanism and the locking mechanism, and the strength of these can be reduced. It In addition, it can be displayed whether the lock is unlocked or locked depending on which through hole of the fixing member is hooked.

[Brief description of drawings]

FIG. 1 is a perspective view showing an unlocked state of a circuit breaker operating device according to the present invention.

FIG. 2 is a perspective view showing a locked state of the circuit breaker operating device according to the present invention.

FIG. 3 is a front view showing the unlocked state of the circuit breaker unlocking device according to the present invention.

FIG. 4 is a front view showing the unlocked state of the circuit breaker unlocking device according to the present invention.

FIG. 5 is a front view of a circuit breaker operating device according to the present invention.

FIG. 6 is a front view of the conventional locking device for a switch when unlocked.

FIG. 7 is a front view of a conventional locking device for a switch when locked.

[Explanation of symbols]

10 ... Fixing member 10a, 10b ... Through hole 11 ... Locking handle 12 ... Cylinder lock 13 ... Locking plate 13a ... Manual handle insertion port 17 ... Shutter 19, 22a, 23a, 24, 26a, 26b ... Engaging pin 21 to 21 23 ... Clutch lever 25 ... Motor 26 ... Reduction gear 27-29 ... Gear 28a ... Manual handle insertion part 32 ... Drive lever 35 ... Disconnection part

Claims (1)

[Scope of utility model registration request] 1. A switch provided with a motor, a deceleration means connected to the motor for decelerating the rotation of the motor, and a gear mechanism for transmitting an output of the deceleration means to a drive mechanism of the switch.
It has a manual handle insertion part provided in the gear mechanism, a fixing member that is formed in a tubular shape by fixing the position, and has two through holes arranged side by side in the length direction, and a through hole that is inserted through the fixing member A locking handle that is moved during unlocking and locking,
At the time of unlocking and locking, a lock that is hung through the through hole of the locking handle and one of the through holes of the fixing member and the through hole of the locking handle and the other through hole of the fixing member, respectively, and is rotatable. A locking plate that is supported and connected to one end of the lock handle, has a manual handle insertion port at the same position as the above-mentioned manual handle insertion part when unlocked, and rotates during locking to close the above-mentioned manual handle insertion part. A locking device for a switch, comprising: and a disconnecting means for disconnecting the connection between the motor and the gear mechanism in conjunction with the rotation of the locking plate during locking.