JPS59204403A - Closure inhibiting mechanism of switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a mechanism for inhibiting closing of a switch.

Switches installed in distribution towers such as those installed on the road can be opened and closed automatically or manually, but during construction work, for example, even if the power is turned off at the location, when the power is restored, the switch is automatically turned on. There was a risk of electric shock if construction workers came into contact with live parts. It is also extremely dangerous if the switch is turned off manually during construction, but another worker accidentally turns it on. For this reason, in the past, prohibition of closing the switch during construction work was done by, for example, fixing the operating handle with a lock pin, simply displaying the prohibition of closing by an appropriate means, or covering the fixed contact with a closing prohibition cover. Measures such as these were taken, but all of these measures were complicated to operate and their effects were incomplete.

This invention was created in view of these points, and includes a disconnection function that locks the open state of the switch both automatically and manually;
In other words, the purpose is to provide a switch equipped with a shut-off mechanism, thereby ensuring safety in electrical work.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 5 show examples of air switches, where 1 is a distribution tower, 2 is a switch supported and fixed within the distribution tower 1, and this switch 2 is provided with a fixed electrode inside. The fixed electrode tube is loaded and opened by attaching and detaching the movable lid 2a containing the movable electrode to and from the fixed electrode tube. Reference numeral 3 denotes a link mechanism section of this switch 2, which rotates the open/close shirt 1-4 by means of a handle receiver 5 fixed to the open/close shaft 4.
The links of the link mechanism section 3 interlock to move the movable lid 2a of the two-phase switch 2 up and down, thereby closing and opening the switch 2 as described above. Further, this switch 2 can be electrically opened and closed automatically, and at this time, the opening/closing shaft 4 and the handle receiver 5 do not rotate.

In FIG. 3, reference numeral 6 denotes two bearings of the opening/closing shaft 4, and these bearings 6 are fixed within the distribution tower with appropriate members. 7 is a substantially box-shaped fixed image fixed to the opening/closing shaft 4 between the bearings 6, and 8 is a U-shaped cross-section that is rotatable in a direction perpendicular to the shaft 4, sandwiching the upper and lower surfaces of the fixed image 7. The handle receiver 5 is fixed to the outer surface of the side plate of the movable frame 8. Reference numeral 9 indicates pins for locking the operating handle protruding from both sides of the handle receiver 5;
0 is a pin passing through the upper and lower plates of this movable frame 8 and the upper and lower sides of the fixed image 7, lla and llb are a central roller groove and a corner roller groove respectively bored at the tips of the upper and lower plates of this movable frame 8; roller grooves 11a and 11
As shown in FIG. 5, b is provided at the center and corner of the top and bottom ends of the movable frame 8.

12 is a fixed shaft protruding from the opposite side of the fixed image 7 from the movable frame 8; 13 is a substantially plate-shaped roller having its own hole 13a slidably inserted into the fixed shaft 12; There are roller receiving grooves 13b on the upper and lower inner sides of 13a.
is provided. 14 is each upper and lower roller receiving groove 13b
and upper and lower roller grooves 11 on one side of the movable frame 8
a or 11. A roller rotatably supported by b and
Each of these rollers 14 has a large diameter portion in the middle of a cylindrical shape, each of the roller receiving grooves 13b corresponds to this shape, and each of the roller grooves 11 of the movable frame 8 corresponds to this shape.
This corresponds to the shape of the large diameter portion of No. 4. Reference numeral 15 denotes a plurality of screws that are mounted on the outer periphery of the fixed shaft 12 that protrudes from the outer surface of each roller 13.

The counter spring 16 is an annular counter spring holder which is also mounted on the fixed shaft 12, and 17 is a spring pin for fixing the counter spring holder 16 to the fixed shaft 12.

3-18 is a limit switch supported and fixed on the side of the movable frame 8. When the limit switch 18 rotates around the pin 10 of the movable frame 8, the lever 18a of the limit switch 18 moves and the switch is turned on. This is a so-called B contact that opens the automatic switching circuit of the switch. 19 is the switch 2 in the distribution tower 1.
and a shielding plate that shields the link mechanism part 3; 20 is an inverted-shaped through hole bored in this shielding plate 19;
The tip of the handle receiver 5 protrudes from the front surface of the shielding plate 19.

In this embodiment, the states shown in FIGS. 4 and 6(A) show the automatic opening/closing and manual opening states of the switch 2, and in order to manually close the switch 2 from this state, the operation handle 21 is used as in the conventional case.
When the tip is inserted and locked into the handle receiver 5, the operating handle 21 is rotated clockwise in FIG. The movable part 2a of the switch 2 is pulled down via the link mechanism 3, and the switch 2 is closed.

4- Roller 1 in roller receiving groove 13b of one roller 13 pushed by flat spring 15 when operating this handle receiver 5
4 is pressed into the center roller groove 1a at the tip of the movable frame 8, and the movable frame 8 does not rotate about the pin 10 as a fulcrum. Therefore, the switch 2 is reliably closed. The same applies to the manual opening operation. In addition, in order to change the switch 2 from the automatic opening/closing and manual opening states to the closing prohibited state, the operating handle 2
1 is tilted (approximately horizontally) as shown in Figure 6 (B),
The handle receiver 5 and the movable frame 8 integrated therewith are connected to the pin 1
0, and the handle receiver 5 is located at the lateral corner of the through hole 20. In this state, the handle receiver 5 is blocked by the lower lateral edge of the through hole 20 and cannot be rotated downward. Further, as the movable frame 8 rotates about the pin 10, the lever 18a of the limit switch 18 is pushed by the movable frame 8, the limit switch 18 is turned on, and the automatic opening/closing circuit of the switch 2 is opened. This state is the input prohibited state. In this operation, since the roller 14 is press-fitted into the roller groove 11 in the center of the movable frame 8, it does not move easily and must be rotated with a force above a certain level. When the movable frame 8 is moved against the force of the spring, the movable frame 8
The roller 14 is removed from the central roller groove 11a, and the roller 14 is press-fitted into the corner roller groove 11a. As a result, the movable frame 8 is locked in this state again.
Do not rotate unnecessarily. Therefore, the switch 2 is neither automatically closed nor manually closed.

Furthermore, Fig. 7 to Fig. 11 show the case of opening/closing a gas-filled type, and as in the above embodiment, during manual operation, when the open/close shaft is rotated, the movable lid of the switch is connected to the fixed electrode tube. It can be attached and detached and opened and closed. In Figure 9, 2
2 is a spline shirt 1 fixed to the outer circumference of the opening/closing shaft.
23 are two bearings 24 that support the opening and closing shafts on both sides of this spline shirt toy 22.
is a fitting hole 24a that fits into this spline shaft 22.
25 is this spline boss 2.
4, 26 is a protrusion protruding from the side of the spline boss 24, and 27a and 27b are central longitudinal grooves vertically bored in the center and corner of the tip of the protrusion 26, respectively. and corner vertical grooves, 28 is a movable frame with a U-shaped cross section that is pivotally supported on this projecting body 26 by sandwiching the upper and lower surfaces of this projecting body 26 between its upper and lower arms, and the side outer surface of this movable frame 28 The handle receiver 5 protrudes from the handle holder 5. 29 is a pin that passes through the upper and lower arms of this movable frame 28 and the upper and lower parts of the projecting body 26; 30 is a notch groove provided on the inner surface of the side portion of this movable frame 28; and 31 is a pin that passes through this movable frame 28 and the handle receiver 5'. One end of this hole 31 communicates with the notched groove 31. 32 is a substantially T-shaped notch with one end inserted into the hole 31 and its tip protruding from the notch groove 30; 33 is a plurality of springs inserted into the hole 31; 34 is the spring 33 inside the hole 31. This is a screw that prevents it from flying out. Due to the force of these springs 33, the notch 3
2 has its tip projected from the notched groove 30 and is fitted into the central longitudinal groove 27a or the corner longitudinal groove 27b of the projecting body 26 of the spline boss 24. Reference numeral 35 denotes an airtight body that covers the spline boss 24 and the spline shaft 22, and the flange 35a of this airtight body 35 is fixed in contact with the side surface of the gas-filled switch housing 36 via a packing.

7- As in the second embodiment, the tip of the handle receiver 5' projects from an inverted-shaped through hole 20 in the shielding plate 19, as shown in FIG.

In the case of this embodiment as well, FIGS. 10 and 6(A)
The state shown in FIG. 2 shows the automatic opening/closing and manual opening state of the switch 2, and in order to manually close the switch 2 from this state, press the operating handle 21.
Insert the tip into the handle receiver 5, lock it, and open/close shaft 4'
When the operating handle 21 is rotated clockwise in FIG. 10 around , and the handle receiver 5' is pushed down below the through hole 20, the switch 2 is closed in the same manner as in the above embodiment. When the handle receiver 5' is operated, the notch 32 pressed by the counter spring 33 is inserted into the central longitudinal groove 26 of the protrusion 26 of the spline boss 24.
Since the alC is press-fitted, the movable frame 28 is attached to pin 2.
Cannot rotate around 9. Therefore, the switch 2 is reliably closed. The same applies to the manual opening operation.

In addition, in order to change the switch 2 from the automatic opening/closing and manual opening states to the closing prohibited state, insert the tip of the operating handle 21 into the handle holder 5'.
When the operating handle 21 is tilted sideways (approximately horizontally) as shown in FIG. When rotated, the handle receiver 5' is located at the lateral corner of the through hole 20. In this state, the handle receiver 5' is blocked by the lateral lower edge of the through hole 20 and cannot be rotated downward.

Further, as in the above embodiment, the rotation of the movable frame 28 about the pin 29 causes the movable frame 28 to push the lever 8a of the limit switch 18, turning on the limit switch 18, and turning on the switch 2. The switching circuit opens. This state is the input prohibited state. In this embodiment as well, the notch 32 is moved into the central longitudinal groove 2 by the force of the counter spring 33.
7a or the corner vertical grooves 27b, the movable frame 28 will not rotate unless a force of a certain value or more is applied. Moreover, once the input is prohibited, the corner vertical groove 2
Since the notch 32 is inserted into the notch 7b and locked, the movable frame 28 will not rotate unless a force above a certain value is applied in the same manner.

In addition to these embodiments, a handle receiver 5 or let type may also be used. In this case, the key cannot be opened without a tablet such as a master key, making it even safer than the above embodiment, and preventing other workers from accidentally inserting the key manually.

Further, in the above embodiment, the automatic opening/closing circuit is opened by tilting the handle receiver 5 or 5' sideways, and manual input is blocked by the lower edge of the through hole 20, but instead of this, the handle receiver 5 Alternatively, when 5' is tilted sideways, the cam is disengaged and the state becomes neutral, making it impossible to open/close the opening/closing shaft 4, and the locking state can be locked by the sideways tilting of the handle receiver 5 or 5' itself. Of course it's a good thing.

As described above, in the present invention, in a switch that can be automatically and manually operated, when the handle receiver is tilted downward from the automatic open state and the manual open state, it is manually closed, and when it is tilted sideways, the closing prohibited state can be locked. Moreover, this operation can be performed easily and reliably at the precise point using the manual closing and opening operation handles.

Therefore, there is no risk that workers at the site will operate the switch incorrectly, and it is possible to completely prevent the switch from being turned on incorrectly when it is opened, thereby preventing accidents caused by carelessly closing the switch during construction work. can

[Brief explanation of drawings]

FIG. 4 is an exploded perspective view, FIG. 4 is a longitudinal cross-sectional view of the same essential part, FIG. 5 is a plan view of the essential part, and FIGS. Explanatory diagram showing the moving state, seventh
Fig. 8 is a partially cutaway front view and partially cutaway side view showing the case where the present invention is used in a gas-filled switch, Fig. 9 is an exploded perspective view of the same essential part, and Fig. 10 is a longitudinal cross-section of the same essential part. FIG. 11 is a plan view of the opening. In the figure, 2 is the switch, 4.4 is the opening/closing shaft, and 5.5'
is a handle holder, 8.28 is a movable frame, 10.29 is a pin, lla is a central offshore roller groove, llb is a corner roller groove, 13 is one roller, 14 is a roller, 15.33
is a spring, 18 is a limit switch, 19 is a shielding plate, 20 is a through hole, 22 is a spline shaft, and 24 is a spline shaft.
11 = prine boss, 26 is a protrusion, 27a is a central longitudinal groove, 27
b is a corner vertical groove, 31 is a hole, and 32 is a notch. =12- Figure 7 19 22- Figure 1O Figure 1I

Claims (1)

[Claims] In a switch that can be operated automatically or manually, in which a movable lid is attached and detached from a fixed electrode tube by rotation of an opening/closing shaft, a movable frame having a U-shaped cross section is pivotally supported on the opening/closing shaft, and a handle holder is attached to the side of this movable frame. The switch is opened and closed by rotating this handle holder in a vertical direction around the opening/closing shaft, and by rotating this handle holder in a substantially horizontal direction, both automatic and manual opening states can be established. A mechanism for inhibiting closing of a switch, characterized by having a mechanism for locking the switch.