JPH074755Y2 - On-site locking device for switch operating devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a field locking device for locking a switch operating device provided in a gas insulated switchgear or the like on site.

[Prior Art] An operating device for a switch, which uses an electric motor as a drive source, includes a main shaft that is rotatably supported and that is connected to the operating part of the switch so as to apply an operating force to the operating part of the switch. An operating mechanism for transmitting the rotation of the manually operated shaft and the rotation of the electric motor to the main shaft via a clutch mechanism to drive the main shaft. In this type of operating device, when the operating mechanism is housed in a case dedicated to the operating device, one surface of the case is used as an operating surface and a manual operating shaft is provided on the operating surface side, and the main shaft is opposite to the operating surface side of the case. Often derived from the outside.

FIG. 6 schematically shows the structure of an operating device of this type used for operating a switch such as a disconnector. In this operating device, an electric motor 1 drives a worm wheel 3 via a worm gear 2. To do. A connecting shaft 4 is provided rotatably passing through the worm wheel, and the connecting shaft 4 is connected to the worm wheel 3 via a clutch mechanism including a driving projection 5 and a driven projection 6. When the worm wheel 3 is driven, the drive projection 5 provided on the worm wheel contacts the driven projection 6 provided on the connecting shaft 4 to drive the connecting shaft 4. When the connecting shaft 4 rotates, the lever 7 attached to the connecting shaft rotates and stores the operating spring 8. When the lever 7 crosses the dead point, the stored force of the operating spring is released. At this time, the driven protrusion 6 is separated from the drive protrusion 5 to release the connection between the connecting shaft 4 and the worm wheel, and the connecting shaft 4 is rapidly rotated by the stored force of the operating spring. At this time, the clutch pawl 10 attached to the connecting shaft 4 engages with the clutch pawl 11 provided on the drive shaft 12 side to connect the connecting shaft 4 to the drive shaft 12, and the drive shaft 12 together with the connecting shaft 4 is rapidly connected. Rotate. The rotation of the drive shaft 12 is transmitted to the main shaft 16 via the lever 13, the link 14 and the lever 15. The main shaft 16 is instructed to rotate, and is directly connected to an operating portion of a switch (not shown). The rotation of the main shaft 16 opens and closes the switch when an operating force is applied to the switch. The rotation range of the drive shaft 12 is regulated by contact between the rotary plate 17 attached to the drive shaft and the stoppers 18 and 19. A shock absorber via a link to lever 15
20 is connected, and an auxiliary switch 21 is connected to the rotating plate 17 via a link mechanism.

A manual operation shaft 23 is also connected to the shaft of the worm gear 2 via a gear transmission mechanism 22, and the manual operation shaft 23 is led out to the front side (operation surface side) of the case accommodating the operation mechanism.

A locking lever 24 is attached to the rotary shaft of the electric motor 1 in order to lock the operating device on site, and in the vicinity of the locking lever 24,
An interlock lever 26 is provided that rotates about a pin 25 between a locking position that engages with the locking lever 22 and an unlocking position that is disengaged from the locking lever. The interlock lever 26 is connected to a lever 28 attached to a rotating rod 27 via a link 30. The rod 27 is led out to the operation surface side, and the operation lever 31 is attached to the end portion of the rod on the operation surface side.

[Problems to be Solved by the Invention] In the above operating device, the operation lever 31 is rotated clockwise in the drawing to rotate the interlock lever 26 to the locking position, thereby rotating the rotation shaft of the electric motor 1. It is possible to lock the operating device by blocking. By rotating the interlock lever 26 to the unlocked position by operating the operation lever 31 in the counterclockwise direction, the rotation of the rotary shaft of the electric motor 1 can be prevented and the operating device can be locked. Further, by rotating the interlock lever 26 to the unlocked position by operating the operation lever 31 in the counterclockwise direction, the electric motor 1 can be rotated and the lock of the operating device can be unlocked.

In the above-mentioned locking device, between the rotary shaft of the electric motor 1 to which the locking lever 24 is attached and the main shaft 16 of the operating device, a clutch mechanism including a driving projection 5 and a driven projection 6, a clutch pawl 10 and Two clutch mechanisms including a clutch mechanism consisting of 11 are provided.

As described above, in the conventional locking device shown in FIG. 6, since the shaft of the electric motor in which the clutch mechanism is interposed between the main shaft 16 of the operating device and the main shaft 16 is locked, compared to the case where the main shaft is directly locked. Some people heard that there was concern about reliability.

An object of the present invention is to enable a main shaft to be locked from the operation surface side in a field locking device for a switch operating device.

[Means for Solving the Problems] The present invention provides a main shaft that is rotatably supported and that is connected to an operating portion of a switch so as to apply an operating force to the operating portion of the switch; The present invention relates to a switch operating device including an operating mechanism for transmitting rotation of a manually operated shaft to the main shaft via a clutch mechanism to drive the main shaft, and a case accommodating the operating mechanism. Here, it is assumed that one surface of the case is an operation surface, a manual operation shaft is provided on the operation surface side, and the main shaft is led out from a surface opposite to the operation surface side of the case.

In the present invention, the portion of the main shaft arranged in the case is extended to the operation surface side of the case, and the lock lever is attached to the end portion of the main shaft on the operation surface side. Also, a lock pin that is displaced in a direction parallel to the axis of the main shaft between a locking position where it abuts on the locking lever and restrains the lever and an unlocking position where it departs from the lever can be operated from the operation surface side of the case. Set up.

[Operation] With the above configuration, the main shaft can be directly locked,
The reliability of the on-site lock can be increased. Further, since the lock pin can be operated from the operation surface side of the case, the operability of the locking operation can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a schematic configuration of an embodiment of the present invention. In FIG. 1, reference numeral 140 is a case accommodating an operating mechanism, 126 is a main shaft of an operating device led out from the rear side of the case 140, and the main shaft 126
Is connected to the operating portion of the switch 52.

In the case 140, the operation spring is stored by the electric motor,
An electric spring operating mechanism that drives the main shaft 126 by the stored force of the operating spring is housed. The main shaft 126 is driven by the operating mechanism so as to reciprocally rotate within a certain angle range, and the opening and closing operations of the switch are performed by rotating the main shaft 126 in one direction and in the other direction from the neutral position. Be seen.

A manual operation shaft 133 is led out to the front surface (operation surface) 140a side of the case, and by operating this manual operation shaft 133, the operation spring can be accumulated to drive the main shaft 126.

In the present invention, since the main shaft 126 is locked, the main shaft 126 is locked.
A portion of the lock lever 135 is extended to the vicinity of the operation surface 140a, the locking lever 135 is fixed to the end of the main shaft 126 on the operation surface side, and the rotation range of the locking lever 135 is divided into two parts. -A lock pin 136 extending perpendicular to A and parallel to the main shaft 126
It is provided on the 140a side. This lock pin is a locking lever 135
The lock lever 135 can be displaced between an unlocking position where the lock lever comes into contact with the lock lever 135 to prevent the main shaft 126 from rotating, and the lock lever 135 is manually operated from the operation surface 140a side. It can be operated.

As described above, the main shaft 126 is extended to the operation surface 140a side, the lock lever 135 is attached to the end of the main shaft 126 on the operation surface side, and the lock lever 136 can be locked by the lock pin 136. 126 can be directly locked. Further, since the lock pin 136 can be operated from the operation surface side, the operation of the on-site lock can be facilitated.

The configuration of this embodiment will be described in detail below with reference to FIGS. FIG. 2 is a perspective view schematically showing the overall structure of the operating mechanism housed in the case 140, FIG. 3 is a front view of the locking device portion, and FIGS. 4 and 5 are FIG. 4 is a sectional view taken along line IV-IV and a sectional view taken along line VV of FIG. 3, respectively.

In this embodiment, a worm shaft is provided on the rotary shaft 102 of the electric motor 101.
103 is connected, and a worm gear 104 is attached to the worm shaft 103. A worm wheel 105 meshes with the worm gear 104, and the rotation of the electric motor 101 is transmitted to the worm wheel 105 via the worm gear 104.

The worm wheel 105 is rotatably pierced through the connecting shaft 106.
The drive projection 107 and the driven projection 108 are provided on the worm wheel 105 and the connecting shaft 106, respectively. The drive projection 107 and the driven projection 108 form a clutch,
When the worm wheel 105 is driven, the driving protrusion 107 contacts the driven protrusion 108 to rotate the connecting shaft 106.

A lever 109 is fixed to one end of the connecting shaft 106, and a tip of the lever is connected to a spring receiving member 111 via a shaft 110. One end of an operation spring 113 guided by a spring guide 112 is fixed to the spring receiving member 111, and the other end of the operation spring 113 is fixed to a frame (not shown) via a pin 114.

When the connecting shaft 106 rotates, the lever 109 rotates, and the operation spring 113 accumulates. When the lever 109 crosses the dead center, the stored force of the operation spring 113 is released, and the driven protrusion 108 becomes the driving protrusion.
The connecting shaft 106 is rapidly rotated away from 107.

A drive shaft 115 is provided on the other end side of the connecting shaft 106, and a rotating plate 116 fixed to one end of the drive shaft 115 faces the other end of the connecting shaft 106. Clutch pawls 117 and 118 are provided on the other end of the connecting shaft 106 and on the rotary plate 116, respectively, and when the connecting shaft 106 is rapidly rotated by the lever 06 beyond the dead center, the clutch pawl 117 becomes the clutch pawl 118. Abut and connect shaft 106 and drive shaft 1
15, and the drive shaft 115 is rotated together with the connecting shaft 106 at high speed.

The rotation range of the drive shaft 115 is a stopper 12 provided so as to come into contact with the rotating plate 116 when the rotating plate 116 rotates by a predetermined angle.
It is regulated by 0 and 121.

The drive shaft 115 is rotated by the lever 122, the link 123 and the lever 124.
Is transmitted to the main shaft 126 rotatably supported by the bearing 125. The main shaft 126 is directly connected to an operating portion of a switch (not shown), and the switch is operated by the rotation of the main shaft 126.

A lever 124 attached to the main shaft 126 is connected to a shock absorber 128 via a link 127, and the shock is absorbed by the shock absorber 128.

The rotating plate 116 is connected to the movable side of the auxiliary switch 130 via the link mechanism 129, and the switch is operated by the main shaft 126 and at the same time the auxiliary switch 130 is operated. This auxiliary switch is used to obtain a signal indicating the operating state of the switch operated by the main shaft 126.

Manually operated shaft 133 via bevel gears 131, 132 on worm shaft 103
The manual operation shaft is led out to the front surface (operation surface) side of the case that houses the operation mechanism. Manual control axis 13
A prismatic operation handle attachment portion 133a is provided at the tip of 3, and the worm wheel 105 is also rotated by rotating the manual operation shaft 133 by the operation handle attached to the operation handle attachment portion 133a to connect the connection shaft 106. It can be rotated.

The spring receiving member 111 is provided with a switch display plate 134 that is displaced together with the spring receiving member to display the operating state of the switch. The open / close display plate 134 is provided on the operation surface side of the case so as to be visible from the outside. Has been.

In the present invention, in order to enable on-site locking, the spindle 12
6 is extended to the operation surface side (the front side in FIG. 2), and the locking lever 135 is attached to the end of the extension portion 126a of the main shaft. And the line A that divides the rotation range of the locking lever 135 into two equal parts
A lock pin 136 extending orthogonally to -A and parallel to the main shaft 126 is provided on the operation surface side so that the lock pin can be operated from the operation surface side.

3 to 5, the structure around the lock pin is shown in detail. In Figures 4 and 5
140a is a case accommodating the operation mechanism, and the frame 141 is arranged inside the operation surface 140. A tip of an extension 126a of the main shaft is supported by a frame 141 via a bearing 142, and a locking lever 135 is attached to the tip of the extension 126a protruding from the bearing 142.

A cylindrical guide member 143 is welded to the frame 141. The guide member is arranged so that its central axis is orthogonal to a line AA that bisects the rotation range θ (see FIG. 3) of the locking lever. Frame 1 of guide member 143
A cut groove 143a is formed at the end on the 41 side, and a guide is provided so that the tip of the lock lever 135 passes through the cut groove 143a of the guide member 143 when the lock lever 135 rotates with the main shaft 126. The position of the member 143 is defined.

A plate 144 is fixed to the guide member 143, and a plate-shaped frame 145 is arranged to face the plate 144. Stud bolts 146 and 146 are fixed to the frame 145, and collars 147 and 147 are fitted to these stud bolts. The tips of the stud bolts 146, 146 protruding from these collars are fitted into the holes provided in the plate 144, and the nuts 148, 1 are attached to the tips of the stud bolts 146, 146 protruding from the plate 144 to the locking lever 135 side.
48 is screwed. By tightening these nuts,
The frame 145 is fastened to the plate 144. The frame 145 is exposed to the outside through a window provided on the operation surface of the case 140.

The lock pin is inserted in the guide member 143 by penetrating the frame 145.
136 is slidably fitted. A stopper pin 150 is fixed to a portion of the lock pin 136 located inside the frame 145.

The lock pin 136 can be displaced between the unlocked position shown in the drawing, which is disengaged from the locking lever 135, and the locking position where the tip of the locking pin 136 abuts the locking lever 135 to prevent the locking lever from rotating. The amount of displacement of the lock pin 136 toward the unlocking position and the amount of displacement toward the locking position are the engagement between the stopper pin 150 and the frame 145 and the stopper pin 150 and the guide member, respectively.
It is regulated by the engagement with 143.

A shallow notch groove 136a is formed in a part of the outer periphery of the lock pin 136, and the bottom surface of the notch groove 136a is formed flat. The notch groove is provided so as to be located adjacent to the end surface of the guide member 143 when the lock pin is in the unlocked position. A stopper 151 that abuts the bottom surface of the cutout groove 136a of the lock pin 136 in the unlocked position is provided, and the stopper 151 is fixed to the frame 141 or 145 by appropriate means. The stopper 151 is biased toward the bottom surface side of the cutout groove 136a by a spring (not shown), and by rotating the lock pin 136, the stopper 151 is displaced against the biasing force of the spring, and the stopper 151 and the cutout groove 136a.
It can be disengaged from a.

When the lock pin 136 is in the unlocked position, the stopper 151 is engaged in the notch groove 136a. In this state, the stopper 151 is engaged with the notch groove 136a to prevent the lock pin 136 from displacing to the locking position side, thereby preventing an erroneous operation in which the lock pin 136 is displaced to the locking position side by an external force. .

When the lock pin 136 in the unlocked position is rotated counterclockwise in FIG. 3, the notch groove 136a is disengaged from the stopper 151, and then the lock pin is pushed in to move to the lock position. Displace.

A horizontal plate portion 145a is provided at the lower end of the frame 145, and a limit switch 152 is screwed to the horizontal plate portion 145a. The limit switch 152 has a reed-like operator 152a, and when the lock pin 136 in the unlocked position is rotated about 180 degrees counterclockwise in FIG. The limit switch is operated by abutting on the operator 152a. The limit switch 152 is used to obtain a signal indicating that the lock pin 136 is in the lock position.

A tongue extending in the same direction as the lock pin is provided on the front surface of the frame 145 so that the lock pin 136 can always be operated in the correct order and the lock pin can be fixed in the unlocked position and the locked position, respectively. Lock pin fixing plates 155 and 156 are fixed. Fixed plate 155 is fixed plate 1
A plate-shaped protruding piece 15 formed longer than 56 and abutting against the fixing plates 155 and 156, respectively, at the head of the lock pin 136 when the lock pin is in the unlocked position and in the locked position.
7 is fixed. Then, with the lock pin 136 in the unlocked position and the notch groove 136a engaged with the stopper 151, the protruding piece 157 abuts the fixed plate 155, and the lock pin 13
The fixing plates 155 and 156 and the projecting piece 157 are arranged so that the projecting piece 157 abuts on the fixing plate 156 when the lock pin is pushed to the locking position by rotating the 6 about 180 degrees counterclockwise in FIG.
And are positioned.

The protruding piece 157 is provided with a hole 157a, and when the lock pin is in the unlocked position, the lock pin 160 (see FIG. 3) is attached through the hole 157a and the hole provided in the fixing plate 155 to attach the lock pin 160. Can be fixed in the unlocked position.

Further, when the lock pin 136 is in the locking position, the lock pin can be fixed in the locking position by attaching the lock through the hole 157a of the protruding piece 157 and the hole 156a provided in the fixing plate 156. ing. On the front surface of the frame 145, display plates 161 and 1 for displaying the unlocked position and the locked position.
62 is attached, and the state of the locking position can be known by checking which side of the display plate the protruding piece 157 is on.

In the above embodiment, the switch is in the open state when each part is in the state shown in FIG. In this state, the electric motor 10
When the worm shaft 103 is rotated in one direction by the manual operation shaft 133 or the worm wheel 105 is rotated in the counterclockwise direction in FIG. 2, the driving protrusion 107 pushes the driven protrusion 108 to move the connecting shaft 106 in the counterclockwise direction. Rotate. At this time, the lever 109 rotates counterclockwise and stores the operation spring 113. In the process of storing the operation spring 113 in this way, the clutch pawl 117 does not come into contact with the clutch pawl 118, so the drive shaft 11
5 does not drive the drive shaft 115. When the lever 109 exceeds the dead center, the stored force of the operation spring 113 is released, and the connecting shaft 106 is rapidly driven counterclockwise by the urging force of the operation spring. When the lever 109 crosses the dead center, the clutch pawl 117 abuts on the clutch pawl 118, so that the rotation of the connecting shaft 106 is transmitted to the drive shaft 115, and the drive shaft 115 is rotated counterclockwise at a constant angle in FIG. It is driven to rotate. This rotation is lever 12
7, the main shaft 126 is transmitted via the link 123 and the lever 124, so that the main shaft 126 is rotationally driven in the counterclockwise direction by a certain angle, whereby a switch (not shown) is closed.

When opening the switch, the worm wheel 1 is rotated by rotating the electric motor 101 or the manual operation shaft 133 in the opposite direction.
Rotate 05 clockwise in Fig. 2. At this time, the connecting shaft 106 rotates clockwise, and the lever 109 rotates clockwise to store the operation spring. When the lever 109 exceeds the dead center, the stored force of the operation spring is released, and the connecting shaft 106 is driven in the clockwise direction. As a result, the drive shaft 115 is driven clockwise by a fixed angle, and the main shaft 126 is driven clockwise.

When the switch is in the closed state and is in operation, as shown in FIG. 3, the locking lever 135 is at the limit position in the counterclockwise direction, and the protruding piece 157 attached to the lock pin 136 is fixed. In the state of being in contact with the plate 155, the locking piece 160 connects the protruding piece 157 and the fixed plate 155. In this state, the lock pin 136 does not engage with the lock lever 135, so that the operation of the switch can be performed without any trouble.

To perform on-site locking, remove the lock 160 and lock pin 1
Rotate 36 in the counterclockwise direction in FIG.
The notch groove 136a of 136 is removed from the stopper 151. Next, the lock pin 136 is pushed in to be displaced to the locking position, and the protruding piece 157 of the lock pin is brought into contact with the fixing plate 156, so that the protruding piece 157
And the fixing plate 156 are connected with a lock. In this state, the lock pin 136 abuts the locking lever 135 to prevent the locking lever from rotating, so that the main shaft 126 is prevented from rotating and the operating device is locked. This locking can be performed regardless of whether the main shaft is on the open position side or the closed position side.

In the above-mentioned embodiment, the electric spring operating device for accumulating the operating spring by the electric motor to obtain the driving force for the operation is taken as an example, but the present invention can be applied regardless of the type of the operating device. .

[Advantages of the Invention] As described above, according to the present invention, the main shaft connected to the operating portion of the switch can be directly locked. Also, since the lock pin can be operated from the operation surface side of the operation unit,
The lock operation can be easily performed.

Therefore, according to the present invention, there is an advantage that the main shaft can be directly locked and the reliability can be enhanced without impairing the operability of the locking device.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a main part of an embodiment of the present invention, FIG. 2 is a perspective view schematically showing a configuration of an operating mechanism of the embodiment, and FIG. 3 is a view of the same embodiment. The front view showing the locking device portion, FIGS. 4 and 5 are sectional views taken along line IV-IV and line VV of FIG. 3, respectively, and FIG. 6 shows a conventional locking device of an operating device. It is the perspective view shown with the structure. 101 ... motor, 104 ... worm gear, 105 ... worm wheel, 106 ... connecting shaft, 107 ... driving projection, 108 ...
… Followed protrusion, 109 …… Lever, 113 …… Operating spring, 115…
… Drive shaft, 117, 118 …… Clutch pawl, 126 …… Main shaft, 126a
…… Main shaft extension, 133 …… Manual operation shaft, 135 …… Locking lever, 136 …… Lock pin, 143 …… Guide member, 151…
… A stopper.

Claims (1)

[Scope of utility model registration request] 1. A clutch mechanism for rotatably supporting a main shaft connected to an operating part of a switch for applying an operating force to the operating part of the switch, and rotating a motor and a manually operated shaft. An operation mechanism for driving the main shaft by transmitting the operation mechanism to the main shaft through a case, and a case accommodating the operation mechanism.
One side of the case is an operation surface, the manual operation shaft is provided on the operation surface side, and the main shaft is led out to the outside from a surface opposite to the operation surface side of the case. In the on-site locking device, the part of the main shaft arranged in the case is extended to the operation surface side of the case, and a lock lever is attached to an end of the main shaft on the operation surface side. A lock pin that is displaceable in a direction parallel to the axis of the main shaft between a locking position for contacting and restraining the lever and an unlocking position separated from the lever is provided so as to be operable from the operation surface side of the case. On-site locking device for the switch operating device.