JPH043522Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides partitions in multiple stages through partition plates arranged horizontally within the box frame, and inside these partitions,
In a so-called control center that houses units that are equipped with unit devices that are designed to control, protect, and monitor the opening/closing of electrical equipment such as a large number of motors and resistive loads, each circuit is assembled into a unit. The unit can be entered and exited smoothly, easily and stably, and as the unit enters and exits, the power supply to the unit equipment can be connected smoothly and reliably, and leakage current to the unit can be automatically reduced. This invention relates to a device for moving a unit into and out of a control center box frame, which can be grounded through the control center box frame.

[Conventional technology]

Generally, the control center has the structure shown in FIG. Reference numeral 1 denotes a box frame of a control center, and inside this box frame, a large number of partition chambers 3 are provided between partition plates 2 arranged vertically in multiple stages at appropriate intervals. A vertical busbar 4 is disposed in the vertical direction behind the partition 3, and a horizontal busbar 5 is connected to the vertical busbar 4. Each partition room 3
Inside, a unit 7 having a power supply disconnector 6 on the rear surface of the frame and mounting unit devices for controlling electrical equipment inside the frame is housed. This unit 7 is arranged so as to be able to go in and out of the partition 3 in the front and rear directions (horizontal to the plane of the drawing).
When the unit 7 is pushed into the back of the partition 3 and stored, the disconnector 6 on the rear surface of the unit is connected to the vertical bus bar 4 via the contact portion 6a.

[Problem that the invention attempts to solve]

However, in such a conventional control center, as mentioned above, the unit 7 is simply arranged to be able to go in and out of the partition 3, and the operation of the unit 7 in and out of the partition 3 is smoothly, easily and stably. It did not have the appropriate structure to do so. Therefore, when the unit 7 moves in and out, there is a risk that the unit 7 will oscillate laterally or vertically, and as a result, the connection between the disconnector and the bus bar will not always be secure and the control operation of the unit device may lack stability. At the same time, there was a risk that the connection between the disconnector and the bus bar would be made in an awkward position, and there was also a risk that a large impact would be applied to the contact portion during the connection. When such a disconnector is connected to the bus bar, a large impact is applied to the contact area or the unit shakes, which can cause damage or wear to the contact area, resulting in an abnormal temperature rise at the contact area. This could also lead to burnout accidents. Furthermore, since the unit did not have an appropriate structure to automatically ground the leakage current flowing through the unit, there was a risk of unexpected accidents such as electric shock caused by touching the unit.

The present invention was devised in view of the above circumstances, and aims to solve the problems of the above-mentioned prior art.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is designed to improve the arrangement structure of the unit in the partition of the control center. Specifically, it is a unit that controls electrical equipment, etc. inside the frame, with a partition plate horizontally arranged within the box frame of the control center, and a disconnector for connection with the bus bar on the rear surface of the frame. A unit equipped with a device and arranged so as to be able to move in and out of the partition plate, and a guide means that is arranged in the partition plate and the unit and guides the movement of the unit in and out parallel to the partition plate, As this guide means, on the partition plate, there is provided a guide metal fitting having a guide edge along the length direction that engages with the notched guide groove of the unit and slidably engages with the upper surface of the frame bottom plate of the unit on the upper side thereof. is arranged along the direction in which the unit comes in and out, and a rotary guide is arranged on the partition plate in front of the guide fitting on the unit side, and is rotatably in contact with the lower surface of the bottom plate of the frame of the unit. It is characterized in that a notched guide groove that engages with the guide fitting of the partition plate is bored in the bottom plate along the direction of entry and exit of the unit, and a contact fitting that comes into contact with the partition plate is attached to the frame bottom plate.

In addition, as a guide means for guiding the above-mentioned movement in and out of the unit in parallel with the partition plate, there is also an operating guide provided on the bottom plate of the frame of the unit that engages with a guide screw fixed to a guide fitting on the partition plate. A threaded rod may also be used. The rotation guide rotatably disposed on the partition plate in contact with the bottom plate of the unit includes those using ball casters, rollers, and the like.

[Effect]

Accordingly, the present invention has the following effects based on the above configuration. The movement of the unit in and out is achieved by the sliding engagement between the notch guide groove provided on the bottom plate of the unit and the guide fitting of the partition plate, the upper surface of the frame bottom plate and the lower surface of the guide edge of the guide fitting, and the bottom plate of the unit's frame. This is done by pushing or pulling the unit into or out of the compartment parallel to the partition plate in the front-rear direction through contact between the part and the rotation guide of the partition plate. Therefore, when the unit is moved in and out of the partition, the unit does not oscillate laterally or vibrate vertically, and the movement of the unit in and out is performed smoothly, easily and stably. Along with this, the connection between the disconnect switch on the rear of the unit and the bus bar is also made smoothly, reliably, and automatically. At this time, the contact fittings provided on the bottom plate of the unit's frame are automatically brought into contact with the partition plate. Therefore, any leakage current flowing into the unit via the control center box frame is automatically and reliably grounded.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the attached drawings, FIGS. 1 to 8. Reference numeral 10 denotes a box frame of the control center, inside which partition plates 11 are disposed horizontally in multiple stages in the vertical direction, and the space between them serves as a partition chamber for housing the units. The rear surface of the partition plate 11 is a vertical plate part 11a that stands vertically, and the upper center part of the partition plate 11 has a U-shaped cross section as shown in FIGS. A guide fitting 12 having a pair of guide edges 12a, 12a parallel to the partition plate 11 extending outward is fixedly disposed along the unit entrance/exit direction. The guide fitting 12 has a length necessary for moving the unit in and out, and a guide threaded portion 13 is fixed to the guide fitting 12, with a screw hole 13a facing the direction in which the unit is moved in and out. A pair of rotary guides 14 are disposed at both ends of the partition plate 11 on the front side of the guide fittings, and are rotatably in contact with the frame bottom plate of the unit. As this rotation guide 14, for example, a ball caster 14 ₁ shown in the fifth figure, a roller 14 ₂ shown in the sixth figure, etc. are used. Ball caster 14 ₁ is
It is rotatably attached to the partition plate 11 with its upper surface protruding above the partition plate 11 via a mounting bracket 14b having a cylinder 14a, and the roller ₁₄₂ is similarly mounted via a shaft pin 14c and a mounting bracket 14d. It is rotatably disposed relative to the partition plate 11 with its upper surface protruding above the partition plate 11. 15 is the partition plate 11
It is a unit that is arranged so as to be accessible in and out of a partitioned room formed within the box frame 10. Unit devices for controlling electrical equipment, etc. are mounted inside the frame. It has a vertical plate portion 15b that stands upright. A power supply disconnector 17 is fixed to the frame vertical plate portion 15b of this unit, which is connected to a vertical bus bar 16 vertically disposed behind the box frame 10 via a contact portion 17a. Unit frame bottom plate 15a
As shown in the fourth figure, both longitudinal side edges 18
a, 18a are guide edges 12a, 12 of the guide fitting 12
A cutout guide groove 18 that is slidably engaged with the lower surface of the unit 15 is formed along the direction in which the unit 15 enters and exits. A pair of electrically conductive contact fittings 19, 19 whose curved tips come into contact with the partition plate 11 are fixed to the frame bottom plate portions 15a on both sides of the rear end of the notched guide groove 18. In addition, on the frame bottom plate portion 15a on the front side of the notch guide groove 18, there is provided a mechanism for operating the unit 15 in and out.
Operation threaded rod 2 for fixing to the partition plate 11
0 are arranged along the direction in which the unit 15 enters and exits. This operating threaded rod 20 has a threaded portion 20a that fits into the threaded hole 13a of the guide screw portion 13 formed at one end thereof, and a lower portion of a flange 20b provided at the other end. is fitted into a fitting hole 15c provided in the frame bottom plate portion 15a of the unit. Further, the operating head 20c at the other end of the operating threaded rod 20 is protruded to the front side of the unit 15. Reference numeral 21 denotes a presser metal fitting for preventing the operating threaded rod 20 from escaping, which is fixed to the frame bottom plate portion 15a. The U-shaped guide fitting 12, the guide screw portion 13, the notched guide groove 18, and the operating screw rod 2
0, the movement of the unit 15 in and out is controlled by the partition plate 11.
A guide means is formed for guiding in parallel with.

The operation of the apparatus according to the above embodiment will now be explained. Figure 2 shows the unit 15 and the partition plate 11.
This figure shows a state in which the unit is carried into a partitioned room from the front side toward the rear side. In this state, as shown in FIG. , 18a on the upper surface of the guide edge 1 of the guide fitting 12
The notch guide groove 1 is arranged so as to come into contact with the lower surfaces of 2a and 12a.
8 and guide fitting 12, unit 1.
5 and slide it toward the rear side of the partition. At this time, in the unit 15, the lower surface of the frame bottom plate 15a is connected to the rotating guide 1 on the partition plate 11.
4, the upper surface of the frame bottom plate portion 15a is in contact with the guide edges 12a, 12a of the guide fitting 12 on the partition plate 11.
The frame bottom plate 15a of the unit, which is in contact with the lower surface, is sandwiched and supported by the guide edge 12a of the guide fitting and the rotating guide 14, and the tip of the contact fitting 19 projects downward from the frame bottom plate 15a. is in contact with the upper surface of the partition plate 11 and slides under the guide of the guide fitting 12. As the unit 15 moves a predetermined distance, the tip of the operating threaded rod 20 comes into contact with the guide threaded portion 13 of the guide fitting 12, and the threaded portion 20 of the operating threaded rod 20 comes into contact with the guide threaded portion 13 of the guide fitting 12.
When the threaded hole 13a of the guide threaded portion 13 is fitted, the operating threaded rod 20 is rotated clockwise. Then, the operating threaded rod 20 moves forward toward the rear side of the partition through engagement with the guide threaded portion 13, and along with this, the unit engaged with the operating threaded rod 20 via the flange 20b. 15
The operation threaded rod 20 also moves forward toward the rear side of the partition. As shown in the first figure, when the vertical plate portion 15b on the rear surface of the frame of the unit 15 comes into contact with the vertical plate portion 11a on the rear surface of the partition plate 11, the clockwise rotation of the operating threaded rod 20 is stopped and the unit 15 is rotated. Stop forward movement. At this time, unit 1
The disconnector 17 on the rear surface of the frame 5 is the contact part 1
7a to the vertical busbar 16 automatically and smoothly. In this state, unit 1
5 is a mutually perpendicular plate portion 15b with respect to the partition plate 11.
11b and the guide screw part 13 and the operating threaded rod 20 are firmly fixed, so that the connection between the disconnector 17 and the vertical busbar 16 is ensured, and vibrations etc. It does not easily come off, and power is stably supplied to the unit devices within the unit 15. At this time, the frame bottom plate portion 15a of the unit 15
The conductive contact fittings 19 provided on the unit 15 are in contact with the partition plate 11, and since the partition plate 11 and the box frame 10 are made of metal and have conductivity, the leakage current to the unit 15 is It will be grounded via the bottom plate portion 15a, the contact fittings 19, the partition plate 11, and the box frame 10. Further, when carrying out the unit 15 from the partitioned room for repair, inspection, etc., the operating threaded rod 20 is rotated counterclockwise. Then, as the operating threaded rod 20 moves back toward the front of the partition with respect to the guide threaded portion 13, the unit 15 also moves toward the guide fitting 12.
The disconnector 17 is disconnected from the vertical busbar 16 and the guide threaded portion 13 and the operating threaded rod 20 are also released, so that the partition of the unit 15 is removed. It is possible to draw it out to the front of the room.

FIG. 8 shows another embodiment of the present invention, in which instead of the U-shaped guide fitting 12, a guide edge 22a having an L-shaped cross section and parallel to the partition plate 11 is provided on the upper side thereof. In this case, a piece 22 provided along the width direction is used. Reference numeral 23 denotes a guide screw portion similar to the guide screw portion 13, which has a screw hole 23a and is fixed to the guide fitting 22. Reference numeral 24 indicates a guide fitting 2 formed on the frame bottom plate portion 15a of the unit.
This is a notched guide groove that engages with the groove 2. This guide fitting 2
Similarly to the case of the U-shaped guide fitting 12, the movement of the unit 15 in and out can be guided through the guide screw portion 23 and the U-shaped guide fitting 12.

[Effect of idea]

Since the present invention is configured as described above, it solves the problems of the prior art described above and has the following effects.

In other words, the movement of the unit into and out of the partition is achieved by the sliding engagement between the notch guide groove in the frame bottom plate of the unit and the guide fitting of the partition plate, and the sliding engagement between the guide edge of the guide fitting and the rotary guide with respect to the frame bottom plate of the unit. This is done by pushing or pulling the unit into the partition in the front-rear direction parallel to the partition plate using the vertically slidable support provided by the partition as a guide, making it easy to move the unit in and out. There is no risk of the unit swinging laterally or vibrating vertically when the unit is moved in and out, allowing smooth and stable movement of the unit in and out, and reducing contact friction between the bottom plate of the unit frame and the partition plate. Therefore, the operation can be performed easily. As a result, the connection position between the unit's disconnect switch and the vertical bus bar is automatically and accurately set, and as a result, the connection between the unit's disconnect switch and the vertical bus bar is automatically made smoothly and reliably. Power can be stably supplied to the unit devices within the unit, and operations such as control of electrical equipment by the unit devices can be stabilized. Furthermore, since the rotary guide supporting the lower surface of the frame bottom plate of the unit is disposed on the front end side of the partition plate, that is, in front of the guide fitting on the unit side, the rotation guide supporting the upper surface of the frame bottom plate of the unit Coupled with the presence of the guide edge of the metal fittings, the unit is always kept parallel to the partition plate, which prevents damage to the front edge of the partition plate due to contact with the bottom plate of the unit, and large force when moving in and out. This makes it possible to prevent as much as possible the forward sagging condition that causes the unit to move in and out.

In addition, since the unit can be moved in and out of the partition room smoothly and stably, the connection between the disconnect switch and the vertical bus bar of the unit is not made in an unreasonable position, so when connecting the disconnect switch and the bus bar, There is no risk of a large impact being applied to the contact part as in the conventional case, and therefore there is no risk of damage or wear to the contact part due to such a large impact or vibration of the unit, or unexpected damage such as burnout due to abnormal temperature rise of the contact part. There is no risk of an accident. Furthermore, since the unit and the partition plate are electrically connected via contact metal fittings, any leakage current flowing into the unit is automatically and reliably grounded, preventing dangers such as electric shock. I can do it.

Furthermore, if a guide means for guiding the unit in and out movement in parallel with the partition plate is used through the fitting of the guide screw part of the guide fitting on the partition plate and the operating threaded rod on the unit, the unit It is possible to make the movement in and out of the partition room smoother, easier and more reliable, and
Since the unit can be automatically and firmly fixed to the partition plate, the connection between the disconnector and the bus bar can be made smoother, more reliable, and more stable, which is preferable.

[Brief explanation of the drawing]

Figures 1 to 8 show an example of the implementation of the present invention. Figure 1 is a vertical sectional view of the device according to the present invention with the unit housed in a partition, and Figure 2 is a cross-sectional view of the unit of the same device. Fig. 3(a) is a plan view of the partition plate showing the guide fittings and rotating guide, Fig. 3(b) is a longitudinal sectional view of the same as above, and Fig. 4(a) shows the cutout guide. A plan view of the unit showing the groove, insertion hole, and contact fitting, Figure 4 (b) is a vertical sectional view of the same as above, Figure 5 (a) is a vertical sectional view when a ball caster is used as a rotation guide, and Figure 5 (b) is a vertical sectional view of the unit. is a side view of the same as above, FIG. 6A is a longitudinal sectional view when a roller is used as a rotating guide, FIG.
7 is a perspective view showing the state of engagement between the U-shaped guide fitting and the frame bottom plate of the unit; FIG. 8 is a longitudinal sectional view showing the state of engagement between the L-shaped guide fitting and the frame bottom plate of the unit; FIG. 9 is a longitudinal cross-sectional view showing the schematic structure of a conventionally commonly used control center. 10... Control center box frame, 11...
Partition plate, 12, 22... Guide fitting, 12a, 22
a... Guide edge, 13, 23... Guide screw part, 13
a, 23a...screw hole, 14...rotation guide (1
4 ₁ ... ball caster, 14 ₂ ... roller), 15
... Unit, 15a... Frame bottom plate part of the unit, 15b... Frame vertical plate part of the unit,
15c...Inset hole, 16...Vertical generatrix, 17...
Disconnector, 18, 24...Notch guide groove, 19...Contact fitting, 20...Threaded rod for operation, 20a...Threaded portion, 20b...Flange.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) There is a partition plate arranged horizontally within the box frame of the control center, and a disconnector for connecting to the bus bar on the rear surface of the frame, and control of electrical equipment inside the frame. A unit equipped with a unit device for performing such operations and arranged so as to be able to move in and out of the partition plate, and a guide means arranged in the partition plate and the unit to guide the movement of the unit in and out parallel to the partition plate. As this guide means, a guide edge is provided on the partition plate along its length, which engages with the notched guide groove of the unit and slidably engages with the upper surface of the frame bottom plate of the unit on the upper side. A guide fitting having the same structure is disposed along the direction of entry and exit of the unit, and a rotary guide is disposed on the partition plate in front of the guide fitting on the side of the unit so as to be rotatably in contact with the lower surface of the frame bottom plate of the unit. The unit is characterized by having a notched guide groove in the bottom plate of the frame that engages with the guide fitting of the partition plate along the direction in which the unit comes in and out, and a contact fitting that comes into contact with the partition plate in the bottom plate of the frame. A device for moving units into and out of the control center box frame. (2) A box for a control center according to claim 1, in which a U-shaped or L-shaped cross section is used as a guide fitting arranged on the partition plate along the direction of entry and exit of the unit. Device for moving units into and out of the frame. (3) As a guide means for guiding the movement of the unit in and out parallel to the partition plate, there is also a guide screw part fixed to the guide fitting on the partition plate with the screw hole facing the direction in which the unit comes in and out, and an end on one side. A screw part is formed on one side to fit into the screw hole of the guide screw part fixed to the guide fitting, and a part of the flange provided on the other end part is engaged in the hole in the bottom plate of the unit's frame to attach the unit. A device for moving a unit into and out of a box frame of a control center according to claim 1 or 2, which uses an operating threaded rod disposed on the bottom plate of the frame along the direction in which the unit moves in and out. (4) Utility model registration claim 1, 2 or 3 in which a ball caster or roller is used as a rotating guide disposed on a partition plate in front of the guide fitting on the unit side. Device for moving units into and out of the control center box frame.