JPH0532904Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a mounting structure for a pointer provided on a switch to indicate "on" and "off".

(Prior art) Conventionally, for example, in a sealed switch, a mechanism case is provided for the switch case, and the mechanism case is linked to an opening/closing drive shaft that drives the opening/closing device in the switch case. An operating mechanism section is provided, and the operating mechanism section is connected to a pointer shaft supported coaxially with the opening/closing drive shaft to the mechanism section case, and the outer end of the pointer shaft is turned on and off.
A guideline was installed to display the following.

(Problem to be solved by the invention) However, with the configuration in which the pointer shaft is linked to the operating mechanism as described above, even if the operating mechanism is closed or opened due to a failure of the operating mechanism, the switch case There is a possibility that the opening/closing device inside the unit is not actually closing/opening. Particularly in closed type switches, the closing/opening state of the switching device cannot be visually confirmed from the outside and must be checked only by the indicator display, which poses an important problem in the event of the above-mentioned failure.

In addition, as mentioned above, the operating mechanism linked to the opening/closing drive shaft generally has a complicated structure with link mechanisms, etc., so its adjustment and assembly are not easy. is generally supported coaxially with the opening/closing drive shaft, so the pointer for on/off display provided at the outer end of the pointer shaft is often provided on the side of the switch case. When the switch is installed on a pillar, etc., there is a problem in that it is difficult to confirm the on/off display from the ground.

Structure of the invention (means for solving the problem) This invention was made to solve the above-mentioned problem, and includes a switching drive for inserting and opening a switching device into a switching device storage space in a switch case. In a switch in which a shaft is rotatably supported close to one side of a switch case, a pointer shaft provided with a pointer indicating on/off at the outer end is arranged to penetrate inside and outside of the switch case. and rotatably supported so that the axis is orthogonal to the axis of the opening/closing drive shaft,
On the other hand, the opening/closing drive shaft is provided with a drive lever protruding toward the pointer shaft, and the inner end of the pointer shaft is provided with a driven lever that is directly linked to the drive lever. It is.

(Function) With the above configuration, when the opening/closing drive shaft is rotated by the closing/opening operation, the opening/closing drive shaft drives the opening/closing device to close/open. At this time, the drive lever of the opening/closing drive shaft rotates in the same direction as the opening/closing drive shaft, and the pointer shaft is rotated for display via the driven lever. Then, the pointer indicates on/off according to the display rotation of the pointer shaft.

(Example) An example in which this invention is embodied in a gas switch will be described below with reference to FIGS. 1 to 5.

Power supply side and load side bushings 2 and 3 are hermetically inserted and fixed to both side walls of a switch case 1 forming a switchgear storage space for each phase. A fixed electrode 4 connected to a conductive member (not shown) inside the bushing 2 is provided protruding from the inner end of the bushing 2 on the power source side.

At the inner end of the bushing 3 on the load side, there is a fixed electrode (not shown) similar to the fixed electrode 4 on the power source side.
is provided protrudingly, and a movable electrode (not shown) is slidably disposed on the outer periphery thereof. The movable electrode (not shown) is arranged so as to be able to approach and separate from the fixed electrode 4 on the power source side. A cylindrical supporting member 5 made of insulating synthetic resin is connected to the outer periphery of the movable electrode, and one end of a bellows 6 made of synthetic rubber that is resistant to arc-extinguishing decomposition gas is attached to the base end thereof. is attached. Same bellows 6
The other end is attached to the inner end of the load-side bushing 3. Further, an orifice cone 7 is attached to the tip of the support member 5.

The support member 5 moves from the position indicated by the chain line (closed state) to the position indicated by the solid line (opened state) in FIG.
When the bellows 6 is moved up to this point, the gas in the bellows 6 is blown through the support member 5 and the orifice cone 7 to the fixed electrode 4 of the power supply side bushing 2.

A switching device 8 is constituted by the fixed electrode 4 on the power source side, the fixed electrode (not shown) on the load side, the movable electrode (not shown), the support member 5, and the like.

An opening/closing drive shaft 9 is rotatably bridged between both end walls of the switch case 1 in close proximity to the bottom wall of the switch case 1 so as to span each phase. The opening/closing drive shaft 9 is provided with a drive lever 9a projecting downward, and an insulating swinging arm 10 made of synthetic resin is provided corresponding to each phase. Swing arm 1
0 is installed by inserting the opening/closing drive shaft 9 into the mounting recess 10a provided in the shape of a horizontal channel at the base end, and screwing the bolt 11 inserted from one side of the base end into the opening/closing drive shaft 9. has been done.

A pair of arm portions 10b are protruded from the distal end of the swing arm 10, and the entire structure is formed into a U-shape, and a support member 5 for supporting the movable electrode is disposed between both arm portions 10b. Interlocking protrusions 10c are provided on the inner surfaces of the arm portions 10b facing each other, and are engaged in interlocking grooves 5a formed in both side surfaces of the support member 5, respectively. That is, when the opening/closing drive shaft 9 is rotated to open/close, the opening/closing device 8 is driven to open/close via the linking protrusion 10c of the swing arm 10.

The opening/closing drive shaft 9 is connected to an automatic switch mechanism (not shown) in a mechanism case (not shown) provided at one end of the switch case 1 and a manual operation handle (not shown) provided outside the mechanism case. )
Automatic opening and closing and manual opening and closing are possible.

A bearing fitting 14 is fixed to the bottom of the switch case 1 so as to be located below the drive lever 9a of the opening/closing drive shaft 9, passing through the inside and outside. A pointer shaft 15 is rotatably supported on the coaxial bearing fitting 14 so that its axis is perpendicular to the axis of the opening/closing drive shaft 9, and a driven lever is provided at the inner end of the pointer shaft 15 in the diametrical direction. 16 are provided protrudingly. In addition, 1
Reference numerals 7 and 18 designate bearing metals fitted into both the inner and outer ends of the bearing fitting 14, and 19 designates a plurality of O-rings fitted onto the outer peripheral surface of the pointer shaft 15.

A groove 16a is cut into the end surface of the driven lever 16, and the drive lever 9 of the opening/closing drive shaft 9 is formed with a groove 16a.
a is involved. That is, the opening/closing drive shaft 9 moves in the direction of arrow Q (turning direction) as shown in FIG.
When the drive lever 9a is rotated in the same direction, the driven lever 16 linked to the drive lever 9a is rotated, so that the pointer shaft 15 moves in the direction of the P arrow shown in FIG. It is designed to rotate in the direction.

Furthermore, when the pointer shaft 15 is rotated in the direction of the arrow opposite to Q in FIG. 3 (the direction of opening rotation), the pointer shaft 15 is rotated in the direction of the arrow opposite to P in FIG. .

A pointer 20 is attached to the outer end of the pointer shaft 15 so as to be orthogonal thereto. A mounting portion 21 provided at the base end of the pointer 20 is formed into a square tube shape.
The pointer 20 has a pair of mounting holes 22 formed through the mounting surfaces of the mounting portion 21 facing each other, and is rotatably inserted into the pointer shaft 15 through the mounting holes 22 . Furthermore, the pointer 20 is attached to a bolt 24 which is screwed into the outer end surface of the pointer shaft 15 which has come out from the mounting part 21 via a washer spring 23.
This prevents the needle from coming off the pointer shaft 15.

On the outer end circumferential surface of the pointer shaft 15 in the mounting portion 21, a flat abutting portion 15a is provided on the proximal side of the pointer 20, and a contact portion 15a is provided between the abutting portion 15a and the 180-degree opposite side. has a through hole 25
is transparent. The support shaft 26 is the same as the pointer shaft 15.
It is inserted into the through hole 25 from the side 180 degrees opposite to the abutting part 15a, and a locking step 26a provided at the head thereof is locked to the opposite side, and a locking step 26a provided at the outer end. It is tightened and fixed by a nut 13 that is screwed onto the screw 26b.

At the tip of the pointer 20, the switch case 1
A latching protrusion 27 is provided on the inner surface of the side. One end of the coil spring 28 is latched to the latching protrusion 27, and the other end is attached by screwing into a threaded portion 26c carved on the outer periphery of the head of the support shaft 26. The coil spring 28 is such that its biasing force always acts in the direction of pulling the latch protrusion 27 toward the support shaft 26 along the direction in which the pointer 20 is attached to the support shaft 26 and the pointer shaft 15.

Now, the operation of the switch pointer mounting structure constructed as above will be explained.

Now, with the pointer 20 indicating "OFF" as shown in FIG. 4, the opening/closing operation mechanism moves the opening/closing drive shaft 9 in the Q arrow direction (turning direction) as shown in FIG.
When the drive lever 9a is rotated in the same direction, the drive lever 9a is also rotated in the same direction. When the drive lever 9a is rotated in the same direction, the driven lever 16 directly linked to the drive lever 9a is rotated, and the pointer shaft 15 is moved to the position P shown in FIG.
Rotate in the direction of the arrow. Then, as the pointer shaft 15 rotates, the support shaft 26 is also rotated in the same direction, and the coil spring 28 is also rotated in the same direction following the support shaft 26. At this time, when the coil spring 28 rotates, it stretches slightly against its own biasing force, but the biasing force immediately pulls the locking protrusion 27 at one end in the direction of rotation, and as a result, the pointer 20 The pointer 20 is rotated about the pointer shaft 15 and displays "on".

Further, when the opening/closing drive shaft 9 is rotated by the opening/closing operation mechanism in the direction of the arrow Q opposite to that shown in FIG. Pointer shaft 1 via lever 16
5 is rotated in the opposite direction of the arrow P in FIG. Thereby, the driven lever 1 linked to the driving lever 9a
6 is rotated, and the pointer shaft 15 is rotated in the opposite direction of the arrow P shown in FIG. Then, as described above, as the pointer shaft 15 rotates, the support shaft 26 and the coil spring 28 are also rotated in the same direction. As a result, the pointer 20 linked to the coil spring 28 via the latch projection 27 is rotated about the pointer shaft 15, and the pointer 20 is rotated about the pointer shaft 15.
"OFF" is displayed.

In this embodiment, if an object collides with the pointer 20, the pointer 20 will move as shown in FIG.
rotates around the pointer shaft 15 against the urging force of the coil spring 28, but since the pointer 20 is loosely inserted into the pointer shaft 15, the pointer shaft 15 rotates due to the impact of this object. Never. And guideline 20
When the pressing force of the object is released, the coil spring 28 rotates and returns to the original position due to the biasing force of the coil spring 28, and the support shaft 26 is again oriented in a fixed direction along the mounting direction of the support shaft 26.

Therefore, if an object touches or collides with the pointer 20, the pointer 20 will rotate freely to avoid the pointer shaft 15 as described above, and the pointer 20 will not be bent or damaged. There is no, and the pointer shaft 15
No external force is applied to the opening/closing mechanism, and no driving force for opening/closing is applied to the opening/closing drive shaft 9 of the opening/closing mechanism.
Further, even if an object gets caught on the pointer 20 while the opening/closing operation mechanism is being opened/closed, the opening/closing operation will not be interrupted or the operation will not be possible. Note that this invention is not limited to the above-described embodiment; for example, in the configuration of the above-mentioned embodiment, the support shaft 26 may be omitted and the other end of the coil spring 28 may be directly attached to the pointer shaft 15, etc. It is also possible to make arbitrary changes without departing from the above.

Effects of the invention As detailed above, in this invention, the pointer shaft is linked directly to the opening/closing drive shaft without going through an operating mechanism such as a link mechanism, so when the opening/closing drive shaft is rotated to open/close. The pointer shaft is reliably rotated for display via the drive lever and the driven lever, and the closing/opening state of the opening/closing device can be reliably displayed by the pointer provided at the outer end of the pointer shaft. In addition, the opening/closing drive shaft and the pointer shaft have a simple structure in which they are linked only by a pair of levers, a drive lever and a driven lever, so the number of parts can be reduced and the pointer can be driven easily. Adjustment and assembly can be done easily and quickly. Furthermore, the pointer shaft is supported with respect to the switch case so that its axis is orthogonal to the axis of the opening/closing drive shaft, so in switch cases where the opening/closing drive shaft is often supported in the horizontal direction, The on/off status can be displayed using a pointer on the bottom of the switch case, and unlike the conventional display, which was displayed on the side of the switch case, it can be easily displayed from the ground even when the switch case is installed on a pole. This has the effect of allowing you to check the display status.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a switch according to an embodiment of this invention, and Fig. 2 is a cutaway sectional view of the main parts.
FIG. 3 is a side sectional view, FIG. 4 is an explanatory diagram showing the action of the pointer, and FIG. 5 is an explanatory diagram of the state in which an external force is applied to the pointer. 1... Switch case, 9... Opening/closing drive shaft, 9a
... Drive lever, 14 ... Bearing fitting, 15 ... Pointer shaft, 16 ... Driven lever, 20 ... Pointer, 21
...Mounting part, 22...Mounting hole, 25...Through hole,
26...Support shaft, 27...Latching protrusion, 28...Coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] In a switch in which the opening/closing drive shaft for driving the opening/closing device by inserting it into the switching device storage space in the switch case is rotatably supported close to one side of the switch case, A pointer shaft 15 provided with a pointer 20 for indicating on/off at the end is arranged so as to pass through the switch case 1 from the inside and outside, and so that its axis is orthogonal to the axis of the opening/closing drive shaft 9. On the other hand, the opening/closing drive shaft 9 is provided with a drive lever 9a protruding toward the pointer shaft 15, and the inner end of the pointer shaft 15 is provided with a drive lever 9a.
A pointer mounting structure for a switch, characterized in that a driven lever 16 is provided which is directly linked to a driven lever 16.