JPH0436163Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a shutter device for a control center control unit, in particular, a control unit equipped with a protruding connector is removably housed in a casing equipped with a vertical bus bar, and the protruding connector is attached to the vertical bus bar. The present invention relates to a shutter device that prevents exposure of a vertical bus bar in a plug-in type control center.

In this type of control center, a vertical bus bar is built into a housing, and a large number of control units are housed in front of the vertical bus bar so that they can be inserted and removed. A projecting connector is mounted on the rear side of each control unit, and by inserting the control unit into its final storage position, the projecting connector connects in a plug-in manner to the vertical bus bar. When the control unit is removed from the housing,
A protective barrier is provided over the entire surface of the vertical busbar to prevent exposure of the vertical busbar when it is in a charged state. The protective barrier has an opening formed therein through which the protruding connector is inserted.

Incidentally, in recent years, in order to improve safety, shutter devices have been provided that automatically open and close the opening of the protective barrier in conjunction with the insertion and removal of the control unit.

This shutter device has a shutter plate that is slidably biased to close an opening in a protective barrier, usually by a spring. This shutter plate must always be held at a constant stop position in order to be well interlocked with the insertion and removal of the control unit and to completely close the opening of the protective barrier. however,
Conventional shutter devices have the disadvantage that warpage of the shutter plate hinders smooth sliding of the shutter plate and that it cannot be reliably stopped at a predetermined stopping position.

The present invention has been devised in view of the above-mentioned conventional problems, and its purpose is to provide a shutter device for a control center control unit that can reliably stop a shutter plate at a predetermined position with a simple configuration.

In order to achieve the above object, the present invention has a casing with a vertical bus bar inside, a control unit with a protruding connector on the back is removably housed in the casing, and the protruding connector is inserted into the casing. A protective barrier configured to be plug-in connected to the vertical bus bar and having an opening through which the protruding connector is inserted is disposed in the front face of the vertical bus bar of the housing, and the protective barrier is arranged along the protective barrier. In a control center provided with a shutter plate having an opening corresponding to the opening of the barrier and slidably biased to close the opening of the protective barrier by an elastic body, the shutter plate is connected to the protective barrier. The shutter plate is slidably held by guide claws formed at the upper and lower positions of the opening, and the sliding bias position of the shutter plate due to the elastic body is adjusted by a stopper claw protruding from the side edge of the guide claw of the shutter plate. is regulated by coming into contact with the guide claw.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

1 to 5 are diagrams showing an embodiment of the present invention.

In the figure, 10 is a control center, and generally a large number of control centers are arranged in parallel. This control center 10 includes a control unit 1 as shown in FIG.
A unit section 14, a vertical wire section 16, a horizontal busbar section 18, and a cable processing section 20 are formed in which cables 2 are stored in multiple stacks.

The casing 22 of the control center 10 has side wall plates 24 vertically installed at each of the four corners, and intermediate supports 26 are vertically installed at the boundary positions between the unit section 14 and the vertical wire section 16 on the front and rear sides. The intermediate struts 26 are connected to each other by horizontal frames 28 at their upper and lower end positions, and a vertical generatrix section 30 is formed at the center in the front-rear direction. The side wall plate 24 on the side of the vertical wire section 16 has its vertical busbar section 3
An inwardly extending support plate 32 is fixed to the 0 side, and the vertical wire section 16 and the vertical bus bar section 30 are separated by this support plate 32 .

The vertical generatrix section 30 includes a three-phase vertical generatrix having a substantially Z-shaped cross section, including an intermediate plate part 34 parallel to the support plate 32, and front legs 36 and rear legs 38 extending in opposite directions from both ends of the intermediate plate part 34. 40 is fixed to the side wall plate 24 etc. by an insulating support device (not shown) and is vertically provided.

The unit compartment 14 has partition plates 42 arranged at predetermined intervals in the vertical direction.
The vertical bus bar section 30 side of each unit room is provided with a back plate 44 as a protective barrier for the vertical bus bar section 30.

An example of the control unit 12 has a case 52, which is made up of left and right side plates 46, and a front horizontal plate 48 and a rear horizontal plate 50 bridged therebetween, as is particularly clear in FIG. The front horizontal plate 48 is used as a drawer handle, and is provided with a latch device (not shown) for positioning, if necessary. A protruding connector 54 is attached to the rear horizontal plate 50. The protruding connector 54 has three protruding housings 56 corresponding to the vertical busbars 40, each of which has a built-in U-shaped contact 58, and is connected to a molded circuit breaker 62 via a lead wire 60. The molded circuit breaker 62 and the electromagnetic switch 64 are attached to a mounting plate 66 fixed between the side plates 46 . Note that 68 is an operating handle device for operating the molded circuit breaker 62 provided on the front door 70 from the outside.

The control unit 12 is installed inside the unit room by engaging the mounting rail 72 formed on the outer surface of the side plate 46 with the J-shaped guide rails 74 formed on both ends of the partition plate 42 of the unit room. It is held in such a way that it can be inserted and removed freely.

On the other hand, the back plate 44 as the protective barrier is
As is particularly clear in FIG. 5, a recess 76 for housing a shutter plate 84, which will be described later, is formed in the upper part, and a bent part 78 that contacts the lower surface of the partition plate 42 is formed in the upper end. The concave portion 76 has a projection housing 5 of the connector 54 at a position facing the vertical bus bar 40.
An opening 80 is bored through which the hole 6 is inserted. Also,
Guide pawls 82 are cut and raised at the upper and lower positions facing the opening 80 of the recess 76, and the shutter plate 84 is held slidably left and right between this and the wall surface of the recess 76.

The shutter plate 84 has an opening 86 corresponding to the opening 80 of the back plate 44, and a reinforcing rib 88 extending over the entire length is formed at the lower part. Then, the shutter plate 84 connects the right end of the reinforcing rib 88 with the back plate 4.
4 is normally slid and biased to the right by a tension spring 90 as an elastic body inserted between the slider and the stopper claw 92 formed by cutting and raising the lower end edge. It is regulated by coming into contact with the guide claw 82 of the back plate 44. In this sliding biased position, the opening 86 of the shutter plate 84 and the opening 80 of the back plate 44 are in a different position, and the opening 80 is closed.

Further, a direct-acting cam 94 made of a steel plate and formed into a right triangle is attached to the left end of the shutter plate 84 by welding, screwing, etc. 96 faces the protrusion housing 56 on the left end side of the control unit 12.

Note that the shutter plate 84 is slid in advance from the left between the recess 76 of the back plate 44 and the guide pawl 82, and then the tension spring 90 is attached, so that the stopper pawl 92 and the guide pawl 82 are in contact with each other. It is securely held without coming off. In this manner, the back plate 44 is fixed to the side wall plate 24 or the support plate 32 with the screw members 98 while holding the shutter plate 84.

Next, the effect will be explained. Assuming that the shutter plate 84 is now in its normal sliding position where it is slid to the right by the tension spring 90, in this state,
As is particularly clear in FIG. 3, the opening 86 of the shutter plate 84 and the opening 80 of the back plate 44 are offset from each other, and the opening 80 of the back plate 44 is in a closed state. In this state, the control unit 12 is mounted on the housing 2 by engaging its mounting rail 72 with the guide rail 74.
When inserted into the unit chamber of 2, the control unit 1
The second protrusion housing 56 engages with the inclined surface 96 of the direct-acting cam 94. Further, when the control unit 12 is inserted, a leftward component of force acts on the linear motion cam 94, so that the shutter plate 84 slides to the left against the tension spring 90. And the protrusion housing 56
When the shutter plate 84 reaches the surface of the shutter plate 84, the opening 8
0 and 86 are in communication, and the protrusion housing 56 reaches the vertical bus bar 40 through both openings 80 and 86 for plug-in connection. At this time,
The direct-acting cam 94 is connected to the rear horizontal plate 5 as shown in FIG.
The control unit 12 is inserted into the control unit 12 through a through hole 100 that is pre-formed in the control unit 10.

Next, when the control unit 12 is pulled out from the housing 22, the shutter plate 84 is gradually moved to the right by the restoring force of the tension spring 90 according to the engagement position between the protrusion housing 56 and the inclined surface 96 of the direct drive cam 94. When the stopper pawl 92 returns to its original position where it contacts the guide pawl 82, the opening 80
is completely closed by the shutter plate 84.

As described above, according to the present invention, the shutter plate is positioned by the stopper claw protruding from the shutter plate coming into contact with the guide claw formed on the protective barrier (the back plate 44 in the above example). Therefore, even if the control unit is repeatedly inserted and removed, the correlation between the opening of the shutter plate and the opening of the protective barrier does not collapse, and a reliable shutter function can be obtained.

Furthermore, if a stopper pawl is provided on the protective barrier side to stop the shutter plate, if the shutter plate is warped, there is a risk of the shutter plate climbing over the stopper pawl. Since the stopper pawl of the shutter plate comes into contact with the guide pawl in the guided portion and is positioned, reliable positioning can be achieved.

Furthermore, since the height of the stopper pawl needs only to be projected to be approximately equal to the height of the guide pawl, the space factor of the control unit is not impaired.

Furthermore, since the shutter plate can be positioned with a simple structure without requiring special parts, it has excellent effects such as being able to be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a control center showing an embodiment of the present invention, and Fig. 2 is a -
3 is a front view showing the state in which the control unit is pulled out in FIG. 2, and FIG. 4 is a sectional view along the line.
FIG. 5 is a longitudinal sectional view of the main part of the figure, and FIG. 5 is a sectional view taken along the - line of FIG. 4. The same members in each figure are given the same reference numerals, 10 is a control center, 12 is a control unit, 22 is a housing, 40 is a vertical bus bar, 44 is a back plate (protective barrier), 54 is a protruding connector, and 56 is a protrusion. In the housing, 80 is an opening, 82 is a guide pawl, 84 is a shutter plate, 86 is an opening, 90 is a tension spring, 92 is a stopper pawl, and 94 is a direct-acting cam.

Claims (1)

[Scope of utility model registration request] The control unit is configured to have a casing with a vertical bus bar therein, to removably house a control unit having a protruding connector on the back side in the casing, and to connect the protruding connector to the vertical bus bar by plug-in. , and a protective barrier having an opening through which the protruding connector is inserted is disposed on the front surface of the vertical bus bar of the casing, and an opening corresponding to the opening of the protective barrier is provided along the protective barrier, and the protective barrier is always open. The control center is provided with a shutter plate that is slidably biased to close the opening of the protective barrier by an elastic body, and the shutter plate has guide claws formed above and below the protective barrier and the opening thereof. The shutter plate is held slidably by the elastic body, and the sliding bias position of the shutter plate by the elastic body is controlled by abutting a stopper pawl protruding from the side edge of the guide pawl of the shutter plate against the guide pawl. A shutter device for a control center control unit, characterized in that the shutter is controlled by