JPH0440369Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a locking device for an outer box of a ground-mounted aerial multi-circuit switch, a high-voltage lead-in switch, etc.

(Prior art) In FIGS. 9 to 11, this type of switch has a plurality of air switches inside a metal outer box 41, and is installed on the road side in a public place such as a street. It is installed with its back to a wall such as a wall or fence, with its front facing toward the sidewalk. For example, a pair of left and right opening/closing doors 42, 43 are provided on the front surface of the outer box 41 so as to be able to open double doors.
Since the switch is installed internally, in order to maintain airtightness inside the outer box 41, a connecting part is provided at the open end of the opening/closing door 43 via a gasket 44, and the outer box 41 and the opening/closing doors 42, 43 are connected to each other. A gasket 45 is also arranged at the contact portion with the inner surface, and one of the opening/closing doors is closed sequentially, and the outer box 41 is locked in the closed state by locking devices 46 to 49 provided on each opening/closing door 42, 43. ing. This locking device 46-4
9, as shown in FIG. 11, by operating and rotating an operating member 50 rotatably provided with respect to the opening/closing door in the locking direction, a locking member 51 provided at the inner end of the operating member 50 is locked in the same direction. The outer box 41
The upper and lower peripheral edges of the opening are locked on the back side 41a (see FIG. 10).

(Problem to be Solved by the Invention) However, in this type of double door opening/closing door, when closing the opening/closing door, the opening/closing door 43 that is following the opening/closing door 42 is closed via the gasket 45 in front of the opening/closing door 42. By locking the locking devices 48 and 49, the preceding opening/closing door 42 is further pressed against the outer box 41 side (in the direction of the arrow in FIG. 10), so that the locking member 51 of the preceding opening/closing door 42 is moved toward the outer box. In particular, in the locking device 46 provided at the top, the locking force with the rear surface 41a of the upper peripheral edge of the opening of the outer box 1 becomes weaker, and the locking member 51 is rotated against its own weight and then locked. Since it is in a locked state, if vibration etc. are applied while this locking force is weakened, the locking member 51 will rotate in the anti-locking direction due to its own weight and the locking will be released, causing both doors to open and close. The upper locks of 42 and 43 are behind the opening/closing door 43
There is a risk that the device may be left with only the lock. In such a state, if a short circuit or the like occurs in the switch, the locking device 46 provided at the top of the outer box 41 becomes a weak part against the pressure increase inside the outer box 41.
Since this part would be destroyed and the pressure would be released to the front of the outer box 41, which could lead to a public disaster, it is necessary to ensure that the locking devices of the respective opening/closing doors 42, 43 are locked.

Structure of the invention (means for solving the problem) This invention was made to solve the above problem, and is a locking device installed at the top and bottom of the opening/closing door that opens and closes the opening of the outer box. an operating member rotatably attached to the opening/closing door by external operation using a key; a lid rotatably attached to the front surface of the opening/closing door and covering a front end surface of the operating member; and the outer box. A reinforcing plate arranged on the back side of the front side wall of the operating member is screwed into a screw carved on the outer periphery of the inner end of the operating member, and rotates as the operating member rotates to engage with the reinforcing plate. a locking member which can be locked in a predetermined position and whose side edges and upper edges in the locking direction are chamfered; a spring washer and a tightening nut which maintain the locking member in a predetermined position in a threaded state with respect to the operating member; A mounting hole is transparently provided in the locking member and has a locking step portion having a smaller diameter on the locking surface side that engages with the reinforcing plate, and a semicircular spherical tip portion is provided inside the mounting hole on the locking surface side. It protrudes, the other end is a flange part that engages with the locking step, and the biased state is maintained by a spring interposed between the cover piece that covers the opening on the opposite side of the mounting hole. The gist is that it consists of a contact member.

(Function) With the above configuration, in the present invention, the operating member cannot be rotated except by external operation using a key.
Since it cannot be opened or closed by a third party, it is possible to prevent danger, and since the locking member engages with a reinforcing plate placed on the back of the front wall, the outer box can be opened without sacrificing its strength. To prevent an outer box from being deformed even when pressure inside the box increases and pressing force acts on an opening/closing door. Furthermore, since the locking member is elastically engaged with the reinforcing plate by the abutting member having the above-mentioned structure, it will not come off from the reinforcing plate even if a pressing force is applied to the opening/closing door toward the outer box side. Since the lock member is chamfered on the one hand, the lock member can be engaged smoothly.

In addition, the lock member is held in a predetermined position on the operating member by a spring washer and a tightening nut, so that dimensional errors during manufacturing can be easily absorbed despite the extremely simple structure. In addition, the engagement pressure of the locking member can also be adjusted in conjunction with the action of the abutting member.

(Example) Hereinafter, an example in which this invention is embodied in a multi-circuit switch will be described with reference to FIGS. 1 to 8.

The outer box 1 of the switch has a square opening 2 in its front wall 1a, and draining ridges 3 having an L-shaped cross section are protruded forward on the four peripheries of the opening 2, forming a square opening. It is formed in a ring shape. In FIG. 2, the front surface of the draining ridge 3 forms a square annular contact portion 3a. Further, a pair of receiving metal fittings 4 each having a semicircular arc cross section are fixed to the lower surface of the center of the upper draining ridge 3 and the upper surface of the center portion of the lower draining ridge 3.

Further, a plurality of hinges 5 are fixedly provided on both sides of the front surface of the outer box 1 in the vertical direction, and a pair of left and right opening/closing lids 6A and 6B covering the opening 2 are pivotally supported on the hinges 5 so as to be rotatable in opening and closing. There is.

The opening/closing door 6A is formed in the shape of a rectangular box with a lid, and a reinforcing frame 7 facing into the opening 2 is fixed to the inner surface of the rectangular box by welding (see FIG. 6), and the outer periphery of the reinforcing frame 7 is A gasket 8 is adhesively fixed to the inner surface of the opening/closing door 6A so as to surround the opening/closing door 6A. It is now possible to touch it. In addition, on the inner surface of the opening/closing door 6A, on the outside of the gasket 8, a plurality of regulating pieces 9 having an L-shaped cross section and abutting against the sides of the gasket 8 are appropriately fixed by welding (see FIG. 6).

In FIG. 4, a side piece 10 protruding toward the outer box 1 at the mating side of the opening/closing door 6A is partially cut out and provided with a U-shaped engagement groove 11 to close the opening/closing door 6A. The draining protrusion 3 on the upper part can be inserted when the pipe is opened. Further, as shown in FIGS. 3 and 5, a matching member 12 having an inverted J-shaped cross section is fixed to the inner surface of the matching side of the opening/closing door 6A so as to bypass the side piece 10. It extends to the upper and lower ends of the opening/closing door 6A.
When closed, it is possible to make contact with the inner surfaces of the recesses of the pair of upper and lower receiving fittings 4. Note that both upper and lower ends of the matching member 12 are formed in an arc shape, and the parts other than both ends are formed in a channel shape. A draining gasket 13 having a V-shaped cross section is fixed to the outer peripheral surface of the matching member 12 on the side of the opening/closing door 6B, which will be described later, so as to extend in the vertical direction.

Since the opening/closing door 6B is provided substantially symmetrically with the opening/closing door 6A, corresponding structures will be given the same reference numerals and only the different parts will be explained.

In the opening/closing door 6B, a matching cover member 1 having an L-shaped cross section is provided on the outer surface of the side piece 14 on the matching side.
5 is fixed and extends in the vertical direction,
An upper piece 15a is integrally formed at the upper end of the combination cover 15, and when combined with the opening/closing door 6A, as shown in FIGS. 3 and 5, the front side edge of the opening/closing door 6A and covers the top surface.

Further, in FIG. 5, the gasket 8 extending vertically along the side piece 14 of the connecting side portion is the abutting end 12a of the connecting member 12 on the opening/closing door 6A.
It is coming into contact with the Further, a packing plate 16 is fixedly fixed between the packing 8 and the side piece 14, and the tip thereof comes into contact with the inner circumferential surface of the matching member 12 when the opening/closing door 6B is closed. We are starting to come into contact with each other.

Therefore, if the internal pressure inside the outer box 1 increases while the opening/closing doors 6A and 6B are brought together and locked by the locking devices L1 to L4 described later, the pressure relief mechanism (not shown) will not operate properly. Since the matching cover 15 is arranged to cover the front and upper surfaces of the matching side edges of the opening/closing door 6A, internal pressure is released laterally from between the matching cover 15 and the opening/closing door 6A. Next, the locking devices L1 to L4 for locking the opening/closing doors 6A, 6B in the closed state will be explained.

First, the locking devices L1 and L3 provided at the top of the opening/closing doors 6A and 6B will be explained with reference to FIGS. 7 and 8.

The locking device L1 is provided at the upper front surface of the opening/closing door 6A, closer to the matching side. The bearing 18 of this locking device L1 is connected to the front panel 17 of the opening/closing door 6A.
and the reinforcing frame 7. The bearing 18
The rotating rod 19 as an operating member is connected to the key 40.
is externally operable and rotatably supported.

A screw 19a is threaded on the outer periphery of the inner end of the rotating rod 19, and a lock plate 20 as a locking member is screwed onto the screw.
A tightening nut 22 is screwed together with a spring washer 21 in elastic contact therebetween. Since the lock plate 20 is thus tightened by the spring washer 21 and the tightening nut 22, the mounting position relative to the rotating rod 19 will not shift. Also, against dimensional errors of each component during manufacturing, for example, variations in the distance between the front panel 17 and the reinforcing plate 32,
Adjustment can be easily made by loosening the tightening nut 22 and changing the screwing state of the lock plate 20 to the rotating rod 19. This lock plate 20 is a reinforcing plate 23 arranged on the upper back surface of the front wall 1a of the outer box 1 when the opening/closing door 6A is closed.
It can be slid against and locked. Incidentally, on the side surface of the lock plate 20 on the door 6A side, a diagonal chamfer 24 is provided on the upper edge and the side edge on the lock direction side, so that when the lock plate 20 is rotated in the lock direction,
The reinforcing plate 23 guides the locking plate 20 smoothly.
It is designed to be locked in place.

A mounting hole 26 with a locking step 25 is provided on the lock surface of the lock plate 20 that engages with the reinforcing plate 23.
is transparently provided, and channel-shaped cover pieces 27 are fixed with screws 28 on both sides of the lock plate 20 so as to cover the opening of the mounting hole 26 on the side opposite to the lock.

An abutment member 29 is disposed within the attachment hole 26 , and the tip thereof is formed in a semicircular shape and is provided so as to be able to protrude and retract from the attachment hole 26 . A locking flange 30 is formed on the outer periphery of the proximal end of the contact member 29, and the locking flange 30 can be locked to the locking step portion 25. Further, a spring 29a is interposed between the locking flange 30 and the cover piece 27, so as to always urge the abutment member 29 in the side direction of the opening/closing door 6A. A lid 31 is rotatably attached to the front surface of the opening/closing door 6A so as to cover the outer end surface of the bearing 18 and the tip of the rotary rod 19.

The locking devices L2 and L4 provided at the bottom of the opening/closing doors 6A and 6B are only arranged so that the lock plate 20 is locked to the back side of the lower peripheral edge of the opening 2 in the outer box 1 when the lock plate 20 is in the locked state. is different from the locking devices L1 and L3.

The operation of the switch configured as described above will be explained.

Now, when the doors 6A and 6B are open, the lock plates 20 of the locking devices L1 to L4 are in the unlocked position. When closing from this state, close from the opening/closing door 6A located on the left side (the fourth
(see figure). At this time, as shown in FIG.
Both upper and lower ends of the matching member 12 of A are locked to the receiving metal fittings 4 provided on the outer box 1, and the packing 8 is brought into contact with the contact portion 3a of the draining ridge 3. At this time, when closing the door 6A, the locking plate 20 of the locking device L2 is held in the unlocked position so as not to interfere with the lower peripheral edge of the opening 2.

In this state, the lid 31 of the locking device L1 is opened, the key 40 is fitted into the rotating rod 19, and the key 40 is rotated in the locking direction. Then, the rotation rod 19 is rotated in the same direction, and the lock plate 20 is rotated from the unlocked position to the lock direction (upward).
It slides against the reinforcing plate 23 of the outer box 1 and is rotated to the lock position.

At this time, since the lock plate 20 has chamfers 24 on the side edges and the upper edge in the locking direction, when the lock plate 20 starts to come into contact with the reinforcing plate 23, it is smoothly guided by the chamfers 24. It rides on the reinforcing plate 23 and slides. Further, when the lock plate 20 starts to come into contact with the reinforcing plate 23 as described above,
When the abutting member 29, whose tip end is normally in a protruding state, comes into contact with the reinforcing plate 23, the tip end of the abutting member 29 moves into the mounting hole 2 against the biasing force of the spring 29a.
In addition to the fact that the reinforcing plate is buried within the locking plate 6 and its tip is spherical, the contact portion of the reinforcing plate with the plate surface is a point, so it does not affect the sliding movement of the locking plate in any way.

Even if a force is further applied to the opening/closing door 6A in the closing direction in this locked state, the abutment member 29 elastically abuts and locks against the reinforcing plate 23 due to the biasing force of the spring 29a, so that the door 6A remains locked. The plate 20 will not rotate toward the unlocked position due to its own weight.
In addition, since the locking plate 20 abuts and locks on the reinforcing plate 23 as described above, the strength of the outer box is not impaired, and even if the pressure of the outer box increases and a pressing force is applied to the opening/closing door, the locking plate 20 remains in contact with the reinforcing plate 23. Do not deform the box.

Next, when locking the locking device L2, use the key 40 to lock the rotary rod 19 in the same way as the locking device L1.
By rotating in the locking direction, it is locked onto the back side of the lower peripheral edge of the opening 2.

After one opening/closing door 6A is closed as described above, the other opening/closing door 6B is subsequently closed. At this time, the matching cover 15 of the opening/closing door 6B is arranged so as to be covered by the front surface of the matching side part of the opening/closing door 6A (see FIGS. 3 and 5). In this state, the locking device L3 provided at the top of the door 6B and the locking device L4 provided at the bottom are locked using the key 40 in the same manner as the locking devices L1 and L2 of the door 6A. When locking the locking devices L3 and L4 of the opening/closing door 6B, the opening/closing door 6B is further pressed in the closing direction so that each lock plate 20 slides smoothly against the reinforcing plate 23 at the upper part of the opening 2 and the lower peripheral edge. However, since the abutting member 29 of the locking device L1 of the opening/closing door 6A elastically abuts and locks against the reinforcing plate 23 as described above, the locking plate 2 of the locking device L1
0 will not rotate in the unlocked direction due to its own weight and become unlocked.

It should be noted that this invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of this invention.

Effects of the Invention As detailed above, this invention provides that when the locking member is locked to the reinforcing plate arranged on the back side of the front wall side of the outer box, the abutment member provided on the locking member Because it elastically abuts and locks against a reinforcing plate placed on the back side of the front wall of the box, the locking member remains in place in front of the outer box even when pressure is applied to the opening/closing door toward the outer box. It will not come off from the reinforcing plate placed on the back side of the wall, and the locked state can be maintained reliably. The locking operation to the locking member is not only carried out smoothly by the chamfered end of the locking member, the ability of the abutting member to be retracted and retractable, and the point contact made by the spherical surface, but also the mounting position is maintained reliably and the mounting Since the position can be adjusted, dimensional errors during manufacturing can be absorbed, and in conjunction with the action of the abutting member, the engagement pressure of the locking member can also be adjusted.

Furthermore, as mentioned above, the locking member can reliably maintain the locked state, so even if a short circuit occurs inside the switch and the internal pressure inside the outer box increases, this opening/closing door will remain firmly in an unopenable state. By being retained, this locking device part does not become a weak part, and the pressure is smoothly released in the specified direction by the corresponding operation of the pressure relief device installed separately on the outer box, and the locking device part located on the sidewalk side is opened and closed. Pressure release at the door is reliably avoided, and since the operating members cannot be operated with anything other than the key, there is no need for a third party to open the door, thereby preventing danger.This has the effect of preventing public disasters, and is highly effective for industrial use. This is an excellent idea for use.

[Brief explanation of drawings]

Figure 1 is a front view of a multi-circuit switch that embodies this invention, Figure 2 is a front view of the outer box with the opening/closing door omitted, and Figure 3 is a schematic view of the case with the opening/closing door combined. Figure 4 is a perspective view of one of the doors in the open state, Figure 5 is a cutaway sectional view of the main parts when the doors are combined, and Figure 6 is the door in the closed state. 7 is a sectional view of the locking device, FIG. 8 is a rear view of the locking device, FIG. 9 is a front view of a multi-circuit switch for explaining the prior art, and FIG. 10 is a partially cutaway sectional view.
The figure is a cross-sectional view of the main parts of the same opening/closing door in a state where they are combined, and FIG. 11 is a cross-sectional view of the main parts of a conventional locking device. 1... Outer box, 2... Opening, 6A, 6B... Opening/closing door, 17... Front panel, 19... Rotating rod (operating member), 20... Lock plate (lock member),
26... Attachment hole, 27... Cover piece, 29... Contact member, 29a... Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A locking device provided at the top and bottom of an opening/closing door for opening and closing the opening of an outer box, comprising an operating member attached to the opening/closing door so as to be rotatable by external operation using a key; a lid rotatably attached to the front surface of the opening/closing door and covering the front end surface of the operating member; a reinforcing plate disposed on the back side of the front wall of the outer box; and a reinforcing plate engraved on the outer periphery of the inner end of the operating member. The lock is screwed into the screw and can be rotated by the rotation of the operating member to engage and lock the reinforcing plate, and has chamfered side edges and an upper edge in the direction of the lock. a spring washer and a tightening nut that maintain the locking member in a predetermined position in a threaded state with respect to the operating member; and a locking member that is transparently provided in the locking member and has a smaller diameter on the side of the locking surface that engages with the reinforcing plate. A mounting hole having a step, a semicircular tip protruding from the locking surface side of the mounting hole, and the other end being a flange that engages with the locking step; 1. A locking device for a multi-circuit switch, etc., comprising a cover piece that covers an opening on the lock surface side, and an abutting member that is kept in a biased state by a spring interposed between the cover piece and the cover piece that covers an opening on the lock side side.