JP3391137B2 - Control center unit locking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control center for storing a plurality of units each having a unit such as a starting circuit of a low-voltage motor as a unit and storing the unit. The present invention relates to a locking device for fixing the position of a unit stored in a control center, and more particularly to an interlock mechanism with a unit door covering the front surface of the unit of the locking device. 2. Description of the Related Art FIG. 7 is a two side view of a control center.
(A) is a front view, (a) is a side view. In this figure, a horizontal bus bar 13 common to the row is provided inside a bus room door 11 provided above the control center, and is electrically connected to a vertical bus 14 provided substantially at the center of the control center. It is connected to the. The horizontal bus is electrically connected to a plurality of other control centers arranged side by side in the illustrated one control center. On the front side of the control center, a busbar room and its door 11 are provided at the uppermost part, and a storage room and unit doors 12 for units, which are vertically stacked, are provided below the busbar room. Are housed therein so as to be freely taken in and out, and the unit door 12 is closed and covered. A unit table 1 is provided below each storage space to facilitate the loading and unloading of the unit 2.
The unit 2 is stored on the unit table 15. The unit door 12 is provided with two rectangular windows so that the breaker 21 and the display panel 22 of the housed unit can be operated or visually recognized from outside. As described above, the unit tables 15 are provided in the storage rooms in the unit doors 12 so that the units can be easily taken in and out and the positions thereof can be fixed. FIG. 8 is a plan view of the unit, and FIG. 9 is a front view. The unit 2 includes a power plug 23 for electrically connecting to the vertical bus 14, a load plug 24 for connecting to a load terminal (not shown in FIGS. 7 and 8), and a guide for facilitating insertion and removal of the unit 2. It comprises a rail frame 26, a mounting plate 25 for mounting equipment, and a position locking device 3 for determining and fixing the installation position of the unit 2. A breaker 21 and a display panel 22 such as an indicating ammeter and a lamp are provided on the front side, and the unit door 12 is closed to exit to the outside even after closing the unit door 12 as described above. . [0005] As shown in a plan view of FIG.
It is provided at the center lower part, and is operated by inserting a flathead screwdriver from an operation hole 31 provided in the guide rail frame 26 shown in FIG. As described later, the lock device 3 fixes the unit 2 to the unit table 15 by the above-described operation, and can select a state in which the unit 2 can be moved in and out as necessary. FIG. 10 is a plan view of the position locking device of FIG. 8, and FIG. 11 is a side view thereof. In these figures, the left side of the figure of the U-shaped locking device frame 30 is fixed to the guide rail frame 26 with a rivet (not shown). A lock plate 33 and a leaf spring 32 are provided between the lock device frames 30, and a lock shaft 34 made of a square bar penetrates the lock plate 33 and the plate spring 32. It is attached to the device frame 30. The stop plate 35 is fixed to the lock plate 33 by rivets indicated by dashed lines. FIG. 12 is an exploded view of the lock device 3 shown in FIGS. In this figure, a rivet is inserted into and fixed to two small holes, which are not denoted by reference numerals, on the inner surface of the right vertical portion of the lock device frame 30 in the figure. The outer surface of the left vertical portion is fixed to the guide rail frame 26 with rivets (not shown) as described above. The lock shaft 34 penetrates through the square through holes 334 on both sides of the lock plate 33, and the right end thereof is inserted into the through hole 351 of the stopper plate 35. The left end of the lock shaft 34 passes through the through hole 321 of the spring 32 and
0 through hole 304. Through holes 304, 32
1, 351 is a circle in which the corners of the lock shaft 34 come into contact with each other, so that the lock shaft 34 can be rotated. Since the two through holes 334 of the lock plate 33 are square, the lock plate 33 rotates together with the lock shaft 34. The right end of the lock shaft 34 is positioned by hitting the right vertical portion of the lock device frame 30, and the left end is positioned by hitting the guide rail frame 26 to limit axial movement. Since the diameter of the through hole 31 provided in the guide rail frame 26 is smaller than the diameter of the through hole 304, the lock shaft 34 does not protrude to the left from the through hole 31. At the left end of the lock shaft 34, an operation groove 341 having an arrow shape as shown in the figure.
The operation groove 341 can be viewed from the through-hole 31 and can be operated by inserting a minus screwdriver and rotating it from the through hole 31 as described later. When the operation groove 341 rotates, the position of the spring 32 is fixed every time the operation groove 341 is rotated by 90 °, so that the spring 32 is stabilized. The lock device frame 30 is provided with a slit 301. The locking claws 331 and 332 provided at the right end of the locking plate 33 in the drawing
It goes in and out according to the rotation angle of 4. FIG. 13 is a partial plan view of the unit table 15, and related members are indicated by two-dot chain lines. In this figure, the unit table 15 is provided with a U-shaped notch 151, and narrow locking slits 152 and 153 projecting from both ends of the unit table 15 below the figure. Lock Slit 15
2 and the right end of the notch 151 correspond to the slit 301 in FIG.
Matches. [0010] Locking claws 331, 3 are common to Figs.
The position of 32 is the same in the drawing, and the lock claw 331 faces down and is inserted into the lock slit 152 via the slit 301, and the lock claw 332 faces sideways and is inserted into the notch 151. There is no state. Since the lock claw 331 is inserted into the lock slit 152, the unit 2 is fixed at this position, and the “LOCK” in the operation position described later is performed.
It is a state of. FIG. 14 is a partial front view mainly showing the shape of the lock plate 33 at the right end in FIG. 12, and a member long in front is shown in a sectional view. In this figure, overlapping with the above,
At the end of the locking plate 33 opposite to the side where the unit door 12 is located, two projections are provided, which are the above-described locking claws 331 and 332, and the slits provided in the locking device frame 30. It is in a state of being inserted into the lock slit 301 and the lock slit 152. FIG. 15 shows an operation hole 31 of the guide rail frame 26.
FIG. 4 is a partial front view of a portion provided with. Operation hole 31
The arrow-shaped operation groove 34 provided on the lock shaft 34
1 is visible. When the arrow of the operation groove 341 faces the direction of “LOCK” as shown in the drawing, the unit 2 is in the position of the lock claws 331 and 332 in FIG. 14, that is, the unit 2 is in a fixed state. Represents time. The position where the locking claw 331 is inserted into the locking slit 152 is the position of the operating state as described above, and the position where the locking claw 331 is inserted into the locking slit 153 is that the unit 2 is pulled out and the power plug 23 and the load plug 24 are connected. This is a state where the unit 2 is fixed away from the bus and the load terminal so that the unit 2 can be tested. [0012] The arrow of the operation groove 341 points upward and “TEST”
, The lock claws 331 and 332 are
Is in a position rotated 90 ° counterclockwise from the state of FIG.
And the position where the lock nail 332 comes out of the slit 301 is at the position where it is inserted into the notch 151 so as to face downward. Lock Claw 3
32 is not fitted in the lock slits 152 and 153, so that the unit 2 can be moved by the left and right dimensions of the notch 151 in FIG. Accordingly, when the lock tab 331 is inserted into the lock slit 152 at the time of “LOCK” and the arrow is set to “TEST”, the lock pawl 331 can be pulled out until it reaches the position of the lock slit 153. Thereafter, when the arrow is returned to the “LOCK” position again, the lock claw 331 is fitted into the lock slit 152, and the unit 2 is fixed at the test position. When the arrow points to "D.OUT", the lock pawls 331 and 332 are at a position rotated 180 degrees counterclockwise from the state of FIG. Since the lock claw 332 faces right and comes out of the notch 151 and the lock slits 152 and 153, the movement of the unit 2 is not restricted at all.
Can be put in and out. It is impossible to rotate the lock shaft 34 clockwise from the state shown in FIG. 14 because the hatched portion of the lock plate 33 becomes an obstacle. In addition, there is no necessity for practical use. In the above-described lock device, the direction of the arrow is changed to "LOC" by operating the operation groove 341.
It can be arbitrarily set at three positions, "K", "TEST", and "D.OUT". Therefore, during normal operation, the position may be other than the “LOCK” position. If the unit 2 is not locked at the "LOCK" position by mistake during operation, the unit 2 may move in the front-rear direction. At that time, the contact of the power plug 23, the load plug 24, etc. becomes unstable and the contact Problems arise, such as the danger of increase and local overheating. An object of the present invention is to solve such a problem, and to prevent the unit door from closing unless it is in the "LOCK" position, so that the control center unit does not operate in a position other than the "LOCK" position. To provide a locking device. According to the present invention, in order to solve the above-mentioned problems, each unit of a control center in which units are stored in a plurality of unit tables and unit doors are closed is provided with a lock shaft. Fixed at the operation or test position (“LOCK”), movable between the operation position and the test position (“TEST”), and can be freely inserted and removed (“D.OUT”) according to the predetermined angular position different by 90 ° ) is three states, a locking device of the control center unit which is selected by operating the external operation member for rotating the locking shaft on the operation side end portion of the locking shaft is fixed to provided, in the operating piece is in the interlock mechanism capable of closing the unit door is provided only when it is in the "lOCK" position also of the interlocking mechanism
The knob only when the control is in the "LOCK" position.
The unit door is provided with a through hole that penetrates and protrudes
And the operation piece is “LOCK”
From the through hole in the knob on the knob when in the position
The protruding part shall be provided with a lock hole. [0017] [action] In the configuration of the present invention, provided to secure the operation member rotating the locking shaft on the operation side end portion of the locking shaft, when in the operating piece to the position of "LOCK" By providing an interlock mechanism that can only close the unit door, the unit door cannot be closed at the “TEST” position or the “D.OUT” position. In the interlock mechanism, one of the plate-like knobs of the operation piece is formed so as to be larger with respect to the rotation axis of the lock shaft, and is disposed at a position which is horizontal when "LOCK". By forming a folded part in which the part in contact with the unit is folded upward and providing a cutout part in which the knob part is cut off at the `` LOCK '' position of this folded part, the position of `` TEST '' and `` At the position of "D.OUT", the notch is different from the position of "LOCK", so that the unit door cannot be closed by hitting the folded part. Or, as described above, the interlock mechanism is formed such that one of the plate-like knobs of the operation piece is formed to be larger than the rotation axis of the lock shaft, and the interlock mechanism is tilted 45 ° upward when “LOCK” is set. Placed in
At the "TEST" and "D.OUT" positions, place the knob at a 45 ° downward position so that the lower part of the unit door hits the knob when "TEST" or "D.OUT" Even with this configuration, the knob cannot hit the unit door and cannot be closed in "TEST" and "D.OUT" as described above. Alternatively, the interlock mechanism is provided with a through hole in the unit door through which the knob portion penetrates and protrudes only when the operation piece is at the “LOCK” position. The unit door cannot be closed because it does not pass through.
Further, if a lock hole is provided in a portion of the knob protruding from the through hole, the lock can be performed using the lock hole after the unit door is closed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
FIG. 1 is a plan view of a lock device according to a first embodiment of the present invention, and FIG. 2 is a side view of the lock device. The same members as those in FIGS. A is added to the description to avoid duplication. In these figures, the lock shaft 3
An operation piece 4A is attached to the left end of the figure, which is the operation side of 4, and is fixed by a screw 42 so as not to be pulled out. The drawing shows the state of the “LOCK” position as in FIGS. 10 to 15. The left end of the operation piece 4A is a knob 4A1 for pinching and rotating the operation piece 4A. The knob 4A1 is asymmetric with respect to the lock shaft 34A and the rotation axis 340 of the operation piece 4A, and It is provided unevenly. Guide rail frame 26 of unit door 12A
The portion in contact with is provided with a folded portion 121 folded upward, and the knob 4 of the operation piece 4A at the position of “LOCK” is provided.
A portion having A1 is cut out to form a cutout portion 122. FIG. 3 is a partial front view in a state where the unit 2A provided with the lock device 3A of FIGS. 1 and 2 is stored in the control center, and the unit door 12A omits a front plate and a peripheral plate portion. In addition, the above-described folded portion 121 is shown so as to be seen. In this figure, the notch 122 provided in the turn-back portion 121 is provided with the knob 4 at the “LOCK” position.
It is provided so as to avoid A1. When the knob 4A1 indicated by the broken line is at the position "TEST" or "D.OUT", the knob 4A1 hits the turn-back portion 121 as shown in the figure. Therefore, when the knob 4A1 is at the "TEST" or "D.OUT" position, the unit door 12A cannot be closed properly. Since it is practically impossible to put the control center into the operating state without closing the unit door 12A, the operating state is set when the operating piece 4A, that is, the lock device 3A is not in the "LOCK" state. Therefore, the power supply plug 2 and the load plug shown in FIG. 8 do not have poor contact. In the test state, the operation piece 4A is still in the "LOCK" position. At this time, the unit 2A is slightly pulled out and protrudes from the storage room of the control center. Since the door 12A cannot be closed, there is no need to consider the test state as to whether the unit door 12A can be closed. The same applies to the following, except for "LOC
In the case of "K", we will consider only the driving state. FIG. 4 is a partial front view showing a second embodiment of the present invention in which a unit provided with a lock device is housed in a control center, and a knob 4A shown in FIG.
FIG. 2 is a diagram showing a portion where 1 is further enlarged. In this figure, the unit door 12 has the same structure as the conventional unit door 12, and does not have the folded portion 121. Instead, the knob portion 4A1 is set at a position having an angle of 45 ° from the horizontal line at any position,
“LOCK” is a position inclined 45 ° to the upper left, “TEST” is a position inclined 45 ° to the lower left, and “D.OUT” is a position inclined 45 ° to the lower right. In "LOCK", the knob 4A1 is connected to the rotating shaft 34.
0, so that it does not hit the horizontally bent portion 123 at the lower part of the unit door 12 indicated by oblique lines, so that the unit door 12 can be closed with the unit stored. No problem. Meanwhile, "TE
In the case of "ST" and "D.OUT", the knob 4A1 is located below the rotating shaft 340, and its lower end hits the bent portion 123, so that the unit door 12 cannot be closed. In the case of this embodiment, the operation piece 4 shown in FIGS.
The operation piece 4A may be attached at a position rotated 45 ° clockwise while the attachment of A is horizontal. "LOCK",
Since the relative positions of the knobs 4A1 of "D.OUT" and "TEST" are all the same as those shown in FIG. 15, the other members may be the same as those of the prior art in both the first and second embodiments. FIG.
FIG. 6 is a plan view of a lock device according to a third embodiment of the present invention, and FIG. 6 is a side view of the lock device, in which the same members as those in FIGS. And duplicate explanations are omitted. The difference between FIGS. 1 and 2 in these figures is that the knob 4B1 of the operation piece 4B is long enough to protrude from the wall surface of the unit door 12B, and the protruding portion has a lock hole 4B.
3 and that a through hole 123 through which the knob 4B1 of the knob 4B1 at the "LOCK" position can pass is provided in the unit door 12B. The through hole 123 has a length larger than the width of the knob 4B1 as shown in FIG. 5 and a thickness larger than the thickness of the plate of the knob 4B1 as shown in FIG. 6, but the width of the knob 4B1. It has an elongated shape with a much smaller width dimension. The position of “LOCK” is of course “D.OU
The positions of "T" and "TEST" are the same as those shown in FIG.
At the position of “TEST”, the knob 4B1 is perpendicular to the through hole 123 and cannot pass through the through hole 123, and “D.
In the “OUT” position, the position of the knob 4B1 is opposite to the rotation shaft 340 from the “LOCK” position.
At this position, the grip portion 4B1 cannot penetrate the through hole 123. Therefore, when "LOCK", the unit door 12B can be closed, but "D.OUT",
In both cases of “TEST”, an interlock mechanism having the same function as described above is provided, in which the knob 4B1 obstructs the unit door 12B and cannot be closed. The lock hole 4B3 provided in the knob portion 4B1 is used to lock the lock. When the unit door 12B is closed in the “LOCK” state and in the operation state, the lock hole 4B3 is formed.
Is locked by using, the unit door 12B cannot be opened by anyone other than the person holding the lock key.
It does not happen that the unit door 12B is intentionally opened and the unit is pulled out by a person concerned who is not carelessly or who is not a person concerned. As described above, each embodiment is provided with an operation piece directly connected to the lock shaft, and has an interlock mechanism that can close the unit door only when the knob is in the "LOCK" position. Because it was established, "D.OUT",
When in the "TEST" position, the unit door cannot be closed. The unit will not be put into the actual operation state with the unit door open, so the unit will not enter any state other than “LOCK” while current is flowing to the power plug and load plug, and therefore these plugs There is no possibility that problems such as increased contact wear and local overheating due to poor contact will occur. According to the present invention, as described above, the operating piece directly connected to the lock shaft is provided, and the unit door is opened only when the operating piece is at the "LOCK" position for fixing the position of the unit. By providing an interlock mechanism that can be closed, the operation piece is in the way and the unit door cannot be closed when it is in the “D.OUT” or “TEST” position,
In the "TEST" position or "D.OUT" position, the unit door remains open, so there is no need to put the control center into operation even if it is mistaken, and a power supply that connects the unit door and the circuit in the control center The effect of eliminating the risk of poor contact of the plug and the load plug, and eliminating the possibility of causing problems such as increased contact wear and local overheating due to the poor contact. The interlock mechanism is such that the shape of the plate-shaped knob portion of the operation piece is biased toward one side of the rotation shaft, and the "LO
CK "position so that it is horizontal,
The `` LOCK '' position is achieved by providing a folded part where the part in contact with the unit of the unit door is folded upward, and a notch where the knob at the `` LOCK '' position of this folded part is cut out. In the case of, the unit door can be closed because the folded part does not get in the way, but in the positions of "TEST" and "D.OUT", the knob part hits the folded part and the interlock mechanism can not be closed Thus, the above-described effect can be obtained. Also, when the knob of the operation piece is set to “LOCK”,
° In the position tilted upward, at the time of “TEST” and “D.OUT”, place it in the position tilted 45 ° downward, and set “TEST” or “D.OUT”.
The interlock mechanism similar to that described above is also formed by causing the knob to hit the lower part of the unit door when "". Further, the knob portion is made long enough to protrude the unit door, and a through hole is provided in the unit door through which the knob portion penetrates when in the "LOCK" position. By making it slender according to the shape, the interlock mechanism similar to that described above is formed because the knob cannot pass through the through-hole at the time of "D.OUT" or "TEST". If you lock the unit door with a lock hole at the part where the knob part protrudes through the through hole and close the unit door, only the person with this lock key can open the unit door. As a result, there is an effect that a person concerned cannot carelessly or intentionally open the unit door.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a lock device according to a first embodiment of the present invention. FIG. 2 is a side view of FIG. 1. FIG. 3 is a control center near the lock device of FIG. FIG. 4 is a partial front view of a control center showing an embodiment of the present invention different from that of FIG. 3; FIG. 5 is a plan view of a lock device showing a second embodiment of the present invention; FIG. 7 is a side view of the controller center of FIG. 5; FIG. 7A is a front view, FIG. 8B is a side view of the controller center; FIG. 8 is a plan view of the unit; FIG. 9 is a front view of the unit; FIG. 11 is a plan view of a conventional locking device. FIG. 11 is a side view of FIG. 10. FIG. 12 is an exploded view of the locking device of FIG. 10. FIG. 13 is a partial plan view of a unit table of FIG. 15 is a front view of the lock plate as viewed from the left side of FIG. 15. FIG. 15 is a partial front view of FIG. , 12A, 12B ... unit door, 2, 2A ... unit, 26 ... guide rail frame, 3, 3A, 3B ... locking device, 30, 30A, 30B
... Locking device frame, 33 ... Locking plate, 34, 34A, 34B ...
Locking shaft, 4A, 4B ... operating piece, 4A1, 4B1 ... knob, 4B3 ... lock hole, 121 ... folded part, 122 ... notch,
123 ... Through-hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/36 H02B 11/00-11/26

Claims (1)

(57) [Claim 1] Each unit of a control center in which a unit is stored in a plurality of unit tables and a unit door is closed, according to a predetermined angular position different by 90 ° of a lock shaft. To the operating or test position ("LOC
K ”) and can be moved between the operating position and the test position (“ TES
T ") and free access (" D.OUT ")
A locking device of the control center unit which is selected by operating the external operation member for rotating the locking shaft on the operation side end portion of the locking shaft is provided with fixed,
In that this operating piece is provided with a possible interlocking mechanism closing the only unit door when in the position of "LOCK", the interlock mechanism, the operation piece "LOCK" position near
Only when the knob part penetrates and protrudes
It is configured to be provided on the unit door,
When the control is in the LOCK position,
A lock device for a control center unit, wherein a lock hole is provided in a portion protruding from a through hole of a knit door .