JPS6341776Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a safety shutter device for a drawer type or disconnector, and in particular, is capable of locking the shutter in a closed state.

[Prior art]

This type of conventional safety shutter device for drawer-shaped disconnectors and disconnectors has a shutter that covers the main circuit conductor in the drawer frame of the disconnector and opens and closes in response to insertion and removal of the disconnector and disconnector. However, since there was no function to lock the shutter in the closed state, it would be dangerous if the shutter opened due to incorrect operation during maintenance or inspection work, so the shutter must be locked in the closed state using a separate locking metal fitting. There was a drawback that required a lot of effort.

[Summary of the idea]

This invention was made in order to eliminate the drawbacks of the conventional device described above, and it locks the shutter in the closed state by providing a key device that fixes the lock plate to the drawer frame in the closed position of the shutter when the disconnector is pulled out. The purpose of the present invention is to provide a safety shutter device for a drawer type or disconnector that can ensure high workability and safety.

[Example of idea]

An embodiment of this invention will be described with reference to FIGS. 1 to 8. Figure 1 is a schematic perspective view of the entire device (however, only a portion of the insulating plate and interphase barrier are shown);
Figures 2 to 4 are cross-sectional plan views showing three different operating positions of the shutter device, Figure 5 is an enlarged view of the main parts of the shutter, and Figures 6 to 7 are two different operating positions of the lock plate. FIG. 8 is a perspective view of the lock plate fixed with a key device. In the figure, 1 is a fixed drawer frame of a branch and a disconnector 2,
It is composed of two left and right side plates 1a and two upper and lower angle members 1b that connect these side plates 1a.
3 is a main circuit conductor attached to the angle member 1b of the drawer frame 1 by a fixing member 4 (in the drawing, 4 3-phase conductors
5 is an interphase barrier disposed between each phase of the main circuit conductor 3, and is attached, for example, by the fixing member 4. Reference numeral 6 denotes two left and right drive plates which are attached to the inside of both side plates 1a of the drawer frame 1 by pins 7 so as to be slidable in the insertion/removal direction of the cutter 2, and 8 indicates the drive plate 6 to be attached to the cutter 2. The tension spring 9 biasing in the drawing direction is an upper and lower slide plate connected to both drive plates 6, and has an oblique long hole 9a and an L-shaped long hole 9b. A pin 6a of the drive plate 6 engages with this oblique elongated hole 9a, and a pin 1c of the angle member 1b engages with the L-shaped elongated hole 9b.
is engaged. 10 is a shutter consisting of two insulating plates that cover the main circuit conductor 3 for each phase of the disconnector 2, and one insulating plate 10A has a protrusion 10c that engages with a horizontally elongated hole 9c of a slide plate 9. The insulating plate 10B is supported by the slide plate 9 without moving in the interphase direction, and the other insulating plate 10B is fixed to the slide plate 9 and moves in the interphase direction. The main circuit conductor 3 is attached to the insulating plate 10A.
A hole 10a for connection between the main circuit conductor 3 and the shingle breaker side conductor 2a corresponding to each of the main circuit conductors 3 and the breaker side conductor 2a is formed, and a hole 10b that engages with the hole 10a is formed in the insulating plate 10B. Further, both side edges of each insulating plate 10A are provided adjacent to the interphase barrier 5, and a gap is provided between the insulating plate 10B and the interphase barrier 5 to allow movement of the insulating plate 10B in the interphase direction. 11 is a lock plate having a long hole 12 extending in the insertion direction of the cutter 2 and swingably attached to the drive plate 6 by a pin 13; 14 is a lock plate fixed to the side plate 1a of the drawer frame 1; a lock pin 12 that engages with the long hole 12 of 11;
Reference numeral a indicates a stepped notch provided in the elongated hole 12 of the lock plate 11 and engages with the lock pin 14 when the drive plate 6 comes to the open position of the shutter 10; This is a spring that biases the lock plate 11 so as not to engage with the lock plate 12a, and is much weaker than the tension spring 8 and is attached to the drive plate 6. 16 is a passage for the lock pin 14 provided on the drive plate 6, and 17 is the upper plate 11b of the lock plate 11.
The hole 18 provided in the drawer frame 1 is a metal fitting that is fixed to the side plate 1a of the drawer frame 1 and has a hole 18a. It is attached to the side plate 1a. Numeral 19 is a padlock that is attached to both holes 17 and 18a. This padlock 19, the metal fitting 18, and the hole 17 in the lock plate 11 constitute a key device.

Next, the effect will be explained. FIG. 2 shows a state in which the armature disconnector 2 is pulled out, the drive plate 6 is pulled back by the tension spring 8, and the hole 10a of the insulating plate 10A is closed by the insulating plate 10B. Now, when the shear cutter 2 is inserted as shown in FIG. Slide it in the direction of the middle arrow 20. At this time, the slide plate 9 is blocked from entering by the pin 1c that engages with the L-shaped elongated hole 9b. As the slide plate 9 slides, the insulating plate 10B also slides in the same direction, and as shown in FIG.
The hole 10b of 0B engages with the hole 10a of the insulating plate 10A, and the hole 10a is opened. At this time, the insulating plate 10
Among the holes 10a of A, the holes 10a located on the rear side when viewed in the sliding direction are the holes 10a of the slidable insulating plate 10B.
It comes off and is released. In this state, lock plate 1
1 also enters together with the drive plate 6, so the lock pin 14
comes to the position of the notch step 12a of the elongated hole 12,
The lock plate 11 is pushed up by the tensile force of the spring 15, so that the lock pin 14 does not engage with the stepped notch 12a (that is, it is not locked). Furthermore, when the sheath cutter 2 is inserted, the pin 6a pushes the slide plate 9 in the direction of the arrow 21 in FIG.
The shutter 10 advances in the same direction with the hole 10a open, and the sheath breaker side conductor 2a is connected to the main circuit conductor 3 protruding from the hole 10a, as shown in FIG.
In this state, the lock plate 11 also advances together with the drive plate 6, so that the lock pin 14 continues along the long hole 12 until it reaches the end point of the long hole 12. In addition, Shiya disconnector 2
When the is pulled out from the inserted state shown in Figure 4,
The driving plate 6, slide plate 9, and insulating plates 10A and 10B are each pulled back by the tensile force of the tension spring 8, and return to the state before the insertion of the sheath cutter 2 shown in FIG. At this time, the lock plate 11 is also pulled back together with the drive plate 6, returning to the state shown in FIG. 6 before the insertion of the cutter 2.

The unlocking of the shutter 10 during maintenance and inspection will be explained. In the state shown in FIGS. 2 and 6 in which the shield breaker 2 is pulled out, the upper part 11a of the lock plate 11 is pushed in the direction of the arrow 22, and the lock pin 14 is pushed against the spring 15 while the drive plate 6 is advanced. When the lock plate 11 is released at the position where it is fitted into the stepped notch 12a of the elongated hole 12, the lock plate 11 becomes a lock with the lock pin 14 engaged with the stepped notched portion 12a of the elongated hole 12, as shown in FIG. state. In this locked state, the spring 15 pushes up the lock plate 11 to remove the lock pin 14 from the notch step 12a. Stepped portion 12
Since the force pressing a against the lock pin 14 is much greater, the locked state is firmly maintained. Of course, in the locked state shown in FIG.
is in the open state shown in FIG. Then, when the upper part 11a of the lock plate 11 is pulled in the direction of the arrow 23 in FIG. is released.

Note that the shutter 10 is unlocked by the drive plate 6.
This can be done by directly pushing the disconnector 2, or by inserting the disconnector 2 to the position shown in FIG. 3 and immediately pulling it out. Similarly, it is also possible to release the lock by inserting the sheath disconnector 2.

A case in which the shutter 10 is locked in the closed state will be explained. Since the closed state of the shutter 10 is the state shown in FIGS. 1, 2, and 6 as described above, the hole 17 of the lock plate 11 matches the hole 18a of the metal fitting 18. Therefore, the 8th
As shown in the figure, insert the padlock 19 into both holes 17 and 18.
The shutter 10 can be locked in the closed state by locking the shutter a. Note that the key device for fixing the lock plate 11 to the side plate 1a of the drawer frame 1 is not limited to the above-described structure that uses the padlock 19.

[Effect of idea]

As described above, according to this invention, the shutter can be locked in the closed state by providing a key device that fixes the locking plate to the drawer frame at the closed position of the shutter when the shutter is pulled out, so that the shutter can be closed. This makes it easier to perform maintenance and inspection work by locking on the condition, and has the effect of providing a high level of safety.

[Brief explanation of drawings]

Figure 1 is a schematic perspective view of the entire device showing one embodiment of this invention (however, only a portion of the shutter and interphase barrier are shown), and Figures 2 to 4 show three different operating positions of the shutter device. Figure 5 is an enlarged view of the main parts of the shutter section, Figure 6 is a cross-sectional plan view showing the
7 to 7 are perspective views showing two different operating positions of the lock plate, and FIG. 8 is a perspective view of the lock plate fixed with a key device. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, 1 is a drawer frame, 2 is a beam and a disconnector, 3 is a main circuit conductor, 6 is a drive plate, 8 is a tension spring, 10 is a shutter, 11 is a lock plate, 12 is a long hole, and 12a is a notch step. , 14 is a lock pin, 15 is a spring, 17 is a hole, 18 is a metal fitting, 18a is a hole, and 19 is a padlock.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A safety shutter for a drawer or disconnector that has a shutter that covers the main circuit conductor in the drawer frame of the disconnector and opens and closes in response to insertion and removal of the disconnector or disconnector. In the apparatus, a drive plate is slidably attached to the drawer frame in the insertion/removal direction of the sheath disconnector and opens and closes the shutter in response to insertion/removal of the sheath disconnector;
A tension spring that biases the drive plate in the direction in which the shroud cutter is pulled out, a lock plate that has a long hole extending in the insertion direction of the shredder cutter and is swingably attached to the drive plate, and the drawer frame. a lock pin that is fixed to the lock plate and engages with the elongated hole of the lock plate; a notch step provided in the elongated hole of the lock plate that engages with the lock pin when the drive plate is in the open position of the shutter; A spring is provided for biasing the lock plate so that the lock pin does not engage with the stepped notch, and when the drive plate reaches the open position of the shutter, an external force is applied to the lock plate to resist the spring. The drawer type is configured to engage the lock pin with the stepped notch, and further includes a key device for fixing the lock plate to the drawer frame in a closed position of the shutter in which the shutter is pulled out. Safety shutter device for breaker. 2. The drawer-shaped key device according to claim 1 of the utility model registration claim, in which the key device is composed of a hole drilled in the lock plate, a metal fitting fixed to the drawer frame and having the hole, and a padlock that is attached to both the holes. Safety shutter device for disconnection.