JP7248197B2 - control center - Google Patents

Description

The present disclosure relates to a control center that houses functional units that control the operation of electric motors.

Conventionally, the housing of a control center accommodates functional units having electric devices for controlling and protecting driving operations, such as opening and closing operations of an external electric motor, in multiple tiers in the vertical direction, which is the longitudinal direction of the housing. . A bus bar is arranged on the rear surface of the functional unit in the housing. A contact included in the functional unit is connected to the busbar, and power is supplied from the busbar through the contact. The connection between the functional unit and the bus is made simultaneously with the operation of inserting the functional unit into the housing. Further, the contacts and busbars of the functional unit are connected by contact pressure, which is the force with which the contacts sandwich the busbars.

A functional unit having an electrical device for controlling and protecting a large-capacity electric motor is large and heavy, so the functional unit itself is also large and heavy. A functional unit that controls and protects a large-capacity motor handles a large current, so it is necessary to secure a large connection area between the contactor and the busbar, which increases the contact pressure accordingly. Therefore, when a functional unit that controls and protects a large-capacity electric motor is inserted into or removed from the housing, a large insertion/removal force is required.
Conventionally, in order to reduce the insertion/removal force of the functional unit, an insertion/removal handle is used as a functional unit insertion/removal device, and the functional unit is inserted/removed using the "lever principle" (see, for example, Patent Document 1).

JP 2017-163674 A

However, in such a conventional control center, the fulcrum, which is the insertion/removal handle, and the action point, which is the connecting portion between the busbar and the contact, are separated, so a large insertion/removal force is required when inserting/removing the functional unit. Met.

The present disclosure has been made in order to solve the above-described problems. An object of the present invention is to provide a control center in which a unit can be inserted and removed.

A control center according to the present disclosure includes a functional unit that is electrically connected to an external electric motor and that controls the electric motor, a functional unit that has contacts that supply power to the electric device, and a functional unit that can be inserted and removed from the front. a housing that accommodates a plurality of functional units in such a state, a busbar extending in a first direction in which the functional units housed in the housing are arranged and arranged on the rear side of the housing, and a front surface and the busbar in the housing and is arranged to extend in the second direction, which is the insertion/removal direction of the functional unit, one of which is fixed to each busbar, and the other of which is connected to the contactor of the functional unit accommodated in the housing. and a busbar connection.

In the control center according to the present disclosure, it is possible to manufacture a control center in which a functional unit can be inserted and withdrawn with a smaller force than the insertion and withdrawal force of a functional unit whose fulcrum is the insertion/removal handle and whose point of action is the connecting portion between the busbar and the contact. can.

1 is a perspective view of a control center according to Embodiment 1; FIG. 4 is a diagram showing how the functional unit housed in the control center according to Embodiment 1 is inserted and removed from the housing 3. FIG. 3 is a partial perspective view of the control center with the functional units according to the first embodiment taken out from the housing; FIG. 4 is a partial perspective view of the control center when the functional units are housed inside the housing according to the first embodiment; FIG. FIG. 10 is a diagram showing how a functional unit housed in the control center according to the second embodiment is inserted and removed from the housing 3; FIG. 8 is a partial perspective view of a control center according to Embodiment 2; FIG. 10 is a partial perspective view of the control center showing the contactor at a position before movement and the contactor 6b at a position where it is moved and connected to the busbar connection portion according to the second embodiment; FIG. 10 is a diagram showing how the contactor, the busbar connection portion, and the busbar are connected from the Z direction according to the second embodiment; FIG. 10 is a diagram showing a 3-phase 3-wire contact that is individually divided into three according to the second embodiment; FIG. 11 is a partial perspective view of a control center according to Embodiment 3; FIG. 10 is a diagram showing how the contactor, the busbar connection portion, and the busbar are connected from the Y direction according to the third embodiment; FIG. 11 is a perspective view of a control center according to Embodiment 4; FIG. 14 is a partial perspective view of the control center when housing the first functional unit and the second functional unit inside the housing according to the fourth embodiment; FIG. 11 is a diagram showing how the first contactor, the second contactor, the busbar connecting portion, and the busbar are connected as viewed in the Y direction according to the fourth embodiment;

Embodiment 1.
FIG. 1 is a perspective view of a control center 1a according to this embodiment. FIG. 2 is a diagram showing how the functional unit 2a accommodated in the control center 1a is inserted and removed from the housing 3. As shown in FIG. In this embodiment, the Y direction is the first direction in which the functional unit 2a is inserted and removed, and the Z direction is the second direction in which the plurality of functional units 2a are sequentially stacked and accommodated inside the housing 3. A third direction perpendicular to each of the directions is denoted by the X direction.

The configuration of the control center 1a will be described with reference to FIGS. 1 and 2. FIG.
As shown in FIGS. 1 and 2, the control center 1a is constructed by housing a plurality of functional units 2a in a box-shaped housing 3 in the Z direction.

A control center according to the present disclosure includes a functional unit that is electrically connected to an external electric motor and that controls the electric motor, a functional unit that has contacts that supply power to the electric device, and a functional unit that can be inserted and removed from the front. a housing that accommodates a plurality of functional units in a state in which the functional units are arranged in the housing; a busbar that extends in the first direction in which the functional units are arranged in the housing and is arranged on the back side of the body; One side is fixed to each busbar, and the other side is connected to the contactor of the functional unit accommodated in the housing. a busbar connection and a busbar connection protection cover disposed in the housing to accommodate the busbar connection and having openings on each of the back side and the front side, wherein the busbar connection has the opening on the back side The contact is connected to the busbar connecting portion by penetrating through the opening on the front side.

As shown in FIG. 2, the functional unit 2a is inserted and removed from the front of the housing 3 in the Y direction. In this embodiment, the functional unit 2a is inserted/extracted by an operator using an insertion/extraction handle 20, which is a functional unit insertion/extraction device. The functional unit 2a is provided with an insertion port (not shown) for the insertion/removal handle 20, and the operator inserts the insertion/removal handle 20 into the insertion port and inserts/removes the functional unit 2a by the "lever principle". An arrow R indicates an insertion/extraction direction of the insertion/extraction handle 20, and an arrow S indicates an insertion/extraction direction of the functional unit 2a. In the present embodiment, the functional unit insertion/removal device is the insertion/removal handle 20, but is not limited to this, and may be any device that can properly insert/remove the functional unit 2a.
In addition, the front surface here means the surface from which the housing 3 is inserted and removed. The back surface is the surface facing the front surface.

Next, the structure of the housing 3 and the functional unit 2a of the control center 1a will be described.
3 is a partial perspective view of the control center 1a with the functional unit 2a shown in FIG. 1 removed from the housing 3. FIG.
FIG. 4 is a partial perspective view of the control center 1a when the functional unit 2a is accommodated inside the housing 3. FIG. It should be noted that only the contactor 6a is shown in the functional unit 2a of the present embodiment, and other parts such as electrical equipment are not shown.

As shown in FIG. 3, a plurality of busbars 4 are arranged on the back side in the housing 3 at predetermined intervals in the X direction.
In this embodiment, a three-phase, three-wire arrangement having three busbars 4 extends in the Z direction, but a single-phase arrangement is also possible.

The busbar connection portion 5 is arranged to extend in the Y direction between the front surface of the housing 3 and the busbar 4 . One of the busbar connection portions 5 is fixed to each busbar 4 and is also electrically connected. The other end of each busbar connection portion 5 is connected to the contactor 6a of the functional unit 2a accommodated in the housing 3. As shown in FIG.
As shown in FIG. 4, in this embodiment, the contactor 6a is integrated with the functional unit 2a. In this embodiment, the contactor 6a is fixed at a position within the functional unit 2a that is connected to the busbar connection portion 5. As shown in FIG. At this time, the contactor 6a is connected by sandwiching the busbar connection portion 5. As shown in FIG. The contactor 6 a is electrically connected to the bus line 4 via the bus line connection portion 5 and is supplied with electric power from the bus line 4 . Then, the contactor 6a supplies the supplied power to the electrical equipment.

The busbar connection portion protection cover 7 accommodates the busbar connection portion 5 and is arranged inside the housing 3 . In FIGS. 3 and 4, it is indicated by a dotted line. The busbar connection protection cover 7 has openings on both the rear surface side and the front surface side. The busbar connection portion 5 is connected to the busbar 4 through an opening on the rear side of the busbar connection portion protective cover 7 . The contactor 6 a is connected to the bus connection portion 5 through an opening on the front side of the bus connection portion protection cover 7 .

The busbar connection portion protection cover 7 prevents an operator from accidentally touching the busbar connection portion 5 and receiving an electric shock when pulling out the functional unit 2 from the housing 3 . In the present embodiment, the busbar connection portion protective cover 7 is made of, for example, hot-rolled mild steel plate such as SPHC, but is not limited to this, and may be made of an insulating material.

Moreover, similarly, it has a busbar protection cover (not shown) so as to cover the busbar 4 from the front side. The busbar protection cover also prevents an operator from contacting the busbar 4 and getting an electric shock. The busbar protection cover is also made of hot-rolled mild steel plate. The busbar protection cover also has an opening through which the busbar connecting portion 5 penetrates and is connected to the busbar 4 .

The operation of an operator who accommodates the functional unit 2a in the housing 3 in this embodiment will be described.
First, an operator inserts the functional unit 2 a into the housing 3 .
Subsequently, the operator inserts the insertion/removal handle 20 into the insertion opening of the functional unit 2a.
The functional unit 2a is inserted into the housing 3 by operating the insertion/extraction handle 20 and moving it in the X direction.
At the same time that the functional unit 2a is inserted, the contactor 6a in the functional unit 2a and the busbar connection portion 5 in the housing 3 are mated and connected. As a result, the functional unit 2a is accommodated in the housing 3, and the contactor 6a and the busbar connection portion 5 are electrically connected. perform the operation of

When inserting/removing the functional unit 2a with the insertion/removal handle 20, the fulcrum is the insertion/removal handle 20 inserted into the functional unit 2a. In the case of the structure that connects the contactor and the busbar, the point of action is the connecting portion where the contactor and the busbar are connected. The point of action in this embodiment is the connecting portion between the contactor 6 a and the bus connecting portion 5 . Therefore, in this embodiment, the fulcrum and the point of action are located closer than in the structure in which the contactor and the busbar are connected.

As described above, according to the present embodiment, when the insertion/removal handle 20 is used, the distance between the fulcrum, which is the insertion/removal handle 20, and the action point, which is the connection portion between the contactor 6a and the busbar connection portion 5, is The connecting portion between the child and the busbar can be brought closer than when the point of action is the point of action, thereby suppressing a decrease in the insertion/extraction force absorbed by the member between the fulcrum and the point of action. Therefore, the functional unit 2 can be easily inserted and removed with a smaller force than when the connecting portion between the contactor and the busbar is the point of action.
As a result, the control center 1a can be manufactured without using a member having high rigidity for the functional unit 2a and the housing 3 in order to efficiently transmit the force from the fulcrum to the point of action. can be reduced.

In the present embodiment, a hot-rolled mild steel plate such as SPHC is used as an example of the busbar connection portion protective cover 7, but the present invention is not limited to this. good. By using the busbar connection protection cover 7 made of light-transmissive resin, the state of the connection between the busbar connection 5 and the contactor 6a can be easily visually recognized after the operator pulls out the functional unit 2a. That is, maintenance work for the control center 1a can be easily performed.

In addition, the busbar connection portion protection cover 7 may be provided with an inspection window so that the state of the busbar connection portion 5 and the connection portion of the contactor 6a can be checked. After pulling out the functional unit 2a, the operator can easily visually recognize the state of the connecting portion between the bus connecting portion 5 and the contactor 6a through the inspection window. That is, maintenance work for the control center 1a can be easily performed.

Embodiment 2.
The difference between Embodiment 1 and Embodiment 2 is that the functional unit is provided with a contactor connection mechanism for moving the contactor. Only the difference from Embodiment 1 will be described below. However, the description of the same or corresponding parts will be omitted. As for the reference numerals, the same reference numerals are used for the same or corresponding portions as those in the first embodiment, and the description thereof will be omitted.

FIG. 5 is a diagram showing how the functional unit 2b accommodated in the control center 1b according to the present embodiment is inserted and removed from the housing 3. As shown in FIG.
FIG. 6 is a partial perspective view of the control center 1b. As shown in FIGS. 5 and 6, when the functional unit 2b is housed in the housing 3, a contactor connection mechanism composed of a handle portion 8 and a contactor moving portion 9 is used. The contactor connection mechanism will be described later. Also, the busbar connection portion protective cover 7 is indicated by a dotted line.

In Embodiment 1, contactor 6a is fixed at a position within functional unit 2a where contactor 6b and busbar connection portion 5 can be connected. When the functional unit 2a is pulled out to the housing 3, the connection is released at the same time.
In the present embodiment, the functional unit 2b is inserted into the housing 3, and then the contactor 6b is moved by the contactor connection mechanism to be connected to the bus line connection portion 5. FIG. When pulling out the functional unit 2b from the housing 3, the contactor 6b is moved by the contactor connection mechanism, and the connection with the bus line connection portion 5 is released.

The operation of an operator who accommodates the functional unit 2b in the housing 3 according to the present embodiment will be described with reference to FIGS. 5 and 6. FIG.
First, an operator inserts the functional unit 2 b into the housing 3 .
At this time, even if the functional unit 2 is inserted into the housing 3, the contactor connection mechanism holds the contactor 6b at the first position, which is the non-connection position where the contactor 6b is not connected to the bus connection portion 5. ing.
Subsequently, the handle portion 8 is inserted into the contact moving portion 9 of the functional unit 2b.
Then, the handle portion 8 is turned in the direction of the arrow N. As the handle portion 8 rotates, the contactor moving portion 9 moves toward the generatrix 4 to move the contactor 6b in the direction of arrow M, which is the Y direction. Then, the contactor 6b is moved to the second position where it is connected to the busbar connection portion 5, and the contactor 6b is connected to the busbar connection portion 5. FIG. In this embodiment, the contactor moving portion 9 has a screw (not shown), and the screw can be rotated and moved as the handle portion 8 is rotated.

FIG. 7 shows the contactor 6b of F1, which is a position not connected to the busbar connection portion 5, and the contactor 6b of F2, which is a position where it is moved and connected to the busbar connection portion 5, in the control center 1b. is a partial perspective view of the. FIG. 7 shows a contactor 6b in which three-phase and three-wire contactors 6b are integrally configured, and move collectively by a contactor connection mechanism. Note that FIG. 7 does not show a contactor connection mechanism.
FIG. 8 is a diagram showing how the contactor 6b is connected to the busbar connection portion 5 and the busbar 4 from the Z direction. The busbar connection portion protection cover 7 is indicated by a dotted line.
9 shows a 3-phase 3-wire contactor in which the contactors are individually divided into three, unlike the one shown in FIGS. 7 and 8 in which the 3-phase 3-wire contactors are integrated. is a diagram showing a contactor of. As in FIG. 7, the contactor 6b of F1, which is a position not connected to the busbar connection portion 5, and the contactor 6b of F2, which is a position where it is moved and connected to the busbar connection portion 5, are shown. .
In this embodiment, as shown in FIGS. 7 to 9, the contactor connection mechanism moves the contactor 6b to connect it to the busbar connection portion 5. FIG. In FIG. 9, each individual contactor 6b has a contactor connection mechanism, which is sequentially moved to be connected to the busbar connection portion 5. In FIG.

As in the first embodiment, according to the present embodiment, when the insertion/removal handle 20 is used, the distance between the fulcrum that is the insertion/removal handle 20 and the action point that is the connection portion between the contactor 6b and the bus connection portion 5 is can be brought closer than when the connecting portion between the contactor and the busbar is the point of action, a decrease in the insertion/extraction force absorbed by the member between the fulcrum and the point of action is suppressed. Therefore, the functional unit 2b can be easily inserted and removed with a smaller force than when the connecting portion between the contactor and the busbar is the point of action.
As a result, the control center 1b can be manufactured without using members having high rigidity in the functional unit 2b and the housing 3 in order to efficiently transmit the force from the fulcrum to the point of action. can be reduced.

In the present embodiment, the work of inserting the functional unit 2b into the housing 3 and the work of connecting the contactor 6b to the bus connection portion 5 by the contactor connection mechanism are divided into two work, whereby the functional unit 2b and the The busbar 4 is electrically connected. Therefore, it is possible to electrically connect the functional unit 2a and the bus 4 with an insertion/removal force smaller than that in the first embodiment in which the above two operations are performed simultaneously. Therefore, the functional unit 2b can be inserted and removed more easily than in the first embodiment. In particular, in the case of the functional unit 2b that performs opening/closing control and protection of a large-capacity electric motor circuit, since the electrical equipment to be housed is large and heavy, the functional unit 2b is also large and heavy. It can be inserted and removed more easily than in the first embodiment.

Embodiment 3.
The difference between Embodiments 1 and 2 and Embodiment 3 is that the contacts are moved in the arrangement direction of the functional units.
In the following, only differences from Embodiments 1 and 2 will be described, and descriptions of the same or corresponding parts will be omitted. As for the reference numerals, the same reference numerals are used for the same or corresponding portions as those in the first embodiment, and the description thereof will be omitted.

FIG. 10 is a partial perspective view of the control center 1c.
FIG. 11 is a diagram showing how the contactor 6c, the busbar connection portion 5, and the busbar 4 are connected from the Y direction. The busbar connection portion protection cover 7 is indicated by a dotted line. Although not shown, the contactor 6c is moved by the contactor connection mechanism composed of the handle portion 8 and the contactor moving portion 9 in the present embodiment as well as in the second embodiment.

10 and 11, the operation of the operator who accommodates the functional unit 2c in the housing 3 according to the present embodiment will be described.
First, an operator inserts the functional unit 2 c into the housing 3 .
At this time, even if the functional unit 2c is inserted into the housing 3, the contactor connection mechanism is in the first position, which is the non-connection position where the contactor 6c is not connected to the bus connection portion 5, as indicated by F1 in FIG. holds the contactor 6c.
Subsequently, the handle portion 8 is inserted into the contact moving portion 9 of the functional unit 2c.
Then, the handle portion 8 is turned in the direction of the arrow N. As shown in FIG. 11, as the handle portion 8 rotates, the contactor moving portion 9 moves toward the generatrix 4 to move the contactor 6c in the direction of arrow M, which is the Y direction. Then, the contactor 6c is moved to the second position where it is connected to the busbar connection portion 5, and the contactor 6c is connected to the busbar connection portion 5. FIG. The second connection position is indicated by F2. The contactor moving portion 9 has a screw, and the screw can rotate and move as the handle portion 8 rotates.

Further, the difference between the busbar connection protection cover 7 of the present embodiment and the busbar connection protection covers 7 of the first and second embodiments is that the busbar connection protection cover 7 of the first and second embodiments While the front side of the cover 7 has an opening through which the contactor 6a or the contactor 6b penetrates, in the present embodiment, the surface of the busbar connection protection cover 7 in the arrangement direction of the functional units 2c is contacted. The point is that it has an opening through which the element 6c passes.

As in the first embodiment, according to the present embodiment, when the insertion/removal handle 20 is used, the distance between the fulcrum, which is the insertion/removal handle 20, and the action point, which is the connection portion between the contactor 6c and the bus connection portion 5, is can be brought closer than when the connecting portion between the contactor and the busbar is the point of action, a decrease in the insertion/extraction force absorbed by the member between the fulcrum and the point of action is suppressed. Therefore, the functional unit 2c can be easily inserted and removed with a smaller force than when the connecting portion between the contactor and the busbar is the point of action.
As a result, the control center 1c can be manufactured without using members having high rigidity in the functional unit 2c and the housing 3 in order to efficiently transmit the force from the fulcrum to the point of action. can be reduced.

In the present embodiment, the work of inserting the functional unit 2c into the housing 3 and the work of connecting the contactor 6c to the bus line connection portion 5 by the contactor connection mechanism are divided into two work, whereby the functional unit 2c and the The busbar 4 is electrically connected. Therefore, it is possible to electrically connect the functional unit 2c and the bus 4 with a smaller insertion/removal force than in the first embodiment in which the above two operations are performed simultaneously. Therefore, the functional unit 2c can be inserted and removed more easily than in the first embodiment. In particular, in the case of the functional unit 2c that performs opening/closing control and protection of a large-capacity electric motor circuit, since the electric equipment to be housed is large and heavy, the functional unit 2c is also large and heavy. It can be inserted and removed more easily than in the first embodiment.

Further, in the present embodiment, the direction in which the functional unit 2c is inserted into the housing 3 is different from the direction in which the busbar connection portion 5 and the contactor 6c are connected. As a result, even if a force is applied to the functional unit 2c from the housing 3 in the Y direction (the direction in which the functional unit 2c is removed from the housing 3), the connection point between the bus connection portion 5 and the contact 6c is Even if there is a deviation in the Y direction, disconnection is suppressed. Furthermore, since the functional unit 2c is sandwiched by another functional unit in the Z direction, even if a force is applied to the functional unit 2c in the Z direction, the functional unit 2c itself will not act as a partition plate that constitutes another upper and lower functional unit. It is pinched and cannot move in the Z direction. Therefore, disconnection between the busbar connection portion 5 and the contactor 6c in the Z direction is suppressed.
Also, for example, if the connection between the busbar connection and the contactor is released due to the impact of a short-circuit accident that occurs while power is being supplied to a load such as a motor via the functional unit, the connection between the busbar connection and the contactor may An arc discharge occurs in the air gap created between them, and there is a risk of inducing an arc discharge accident. According to the present embodiment, disconnection between the busbar connection portion 5 and the contactor 6c is suppressed, so that an arc discharge accident can be suppressed.

In the present embodiment, the contactor connection mechanism capable of moving the contactor 6c in the Z direction was taken as an example. Any contact connecting mechanism may be used as long as it allows the contact 6c to move in the vertical direction. Therefore, for example, the contactor 6c may be moved in the X direction for connection.

It is desirable that the busbar connection portion protection cover 7 has the same shape or a size larger than the same shape as the Z-direction projected plane of the functional unit 2c. As a result, when the functional unit 2c is inserted into the housing 3, the entire bottom surface, which is the surface on which the busbar connection 5 of the functional unit 2 is arranged, is supported by the busbar connection protection cover 7, so that the functional unit 2c functions smoothly. The unit 2c can be detached.

Embodiment 4.
The difference between Embodiments 1 to 3 and Embodiment 4 is that a contactor connection mechanism is provided to move the contactor in the arrangement direction of the functional units, and the busbar connection portion is provided between the functional units arranged in the arrangement direction. It is a point to share.
In the following, only differences from Embodiments 1 to 3 will be described, and descriptions of the same or corresponding parts will be omitted. As for the reference numerals, the same reference numerals are used for the same or corresponding portions as those in the first embodiment, and the description thereof will be omitted.

FIG. 12 is a perspective view of the control center 1d according to this embodiment. 13 is a partial perspective view of the control center 1d when the first functional unit 2d1 and the second functional unit 2d2 are accommodated inside the housing 3. FIG. Note that, of the first functional unit 2d1 and the second functional unit 2d2 of the present embodiment, only the contactor 6d1 and the contactor 6d2 are illustrated, and other parts such as electrical equipment are not illustrated.

The first functional unit 2d1 and the second functional unit 2d2 are a set of functional units accommodated in the housing 3 following the arrangement direction in which the plural accommodated functional units are arranged.
The first functional unit 2d1 has contacts 6d1. The second functional unit 2d2 has contacts 6d2.

FIG. 14 is a view showing how the contactor 6d1 and the contactor 6d2 are connected to the busbar connecting portion 5 and the busbar 4 as viewed in the Y direction. The busbar connection portion protection cover 7 is indicated by a dotted line. Although not shown, in the present embodiment as well, the contactor 6d1 and the contactor are connected by a contactor connection mechanism composed of the handle portion 8 and the contactor moving portion 9, as in the second and third embodiments. Move 6d2. When pulling out the first functional unit 2d1 from the housing 3, the contactor 6d1 is moved by the contactor connection mechanism, and the connection with the bus line connection portion 5 is released. The same is true for the second functional unit 2d2.

13 and 14, the operation of an operator who accommodates the first functional unit 2d1 and the second functional unit 2d2 in the housing 3 in this embodiment will be described.
First, the operator inserts the first functional unit 2d1 into the housing 3. As shown in FIG.
At this time, even if the first functional unit 2d1 is inserted into the housing 3, the contactor connection mechanism holds the contactor 6d1 at the first position, which is the non-connection position where the contactor 6d1 is not connected to the bus connection portion 5. are doing.
Subsequently, the handle portion 8 is inserted into the contact moving portion 9 of the first functional unit 2d1.
Then, the handle portion 8 is turned. As the handle portion 8 rotates, the contact moving portion 9 moves toward the generatrix 4 to move the contact 6d1 in the Z direction. Then, the contactor 6d1 is moved to the second position where the busbar connection portion 5 is connected to the busbar connection portion 5, and the contactor 6d1 is connected to the busbar connection portion 5. FIG. The contactor moving portion 9 has a screw, and the screw can rotate and move as the handle portion 8 rotates.
Next, the operator inserts the second functional unit 2d2 into the housing 3. As shown in FIG.
Subsequently, the handle portion 8 is inserted into the contact moving portion 9 of the second functional unit 2d2.
Then, the handle portion 8 is turned to move the contactor 6d2 toward the first functional unit 2d1, thereby connecting the contactor 6d2 to the bus connection portion 5. FIG.

As in the first embodiment, according to the present embodiment, when the insertion/removal handle 20 is used, the fulcrum which is the insertion/removal handle 20 and the connection portion between the contactor 6d1 or the contactor 6d2 and the busbar connection portion 5 act as the fulcrum. Since the distance to the point can be made closer than when the connecting portion between the contactor and the generatrix is the point of action, the decrease in the insertion/extraction force absorbed by the member between the fulcrum and the point of action is suppressed. Therefore, the functional unit 2d1 and the functional unit 2d2 can be easily inserted and removed with a smaller force than when the connecting portion between the contactor and the busbar is the point of action.
As a result, the control center 1d can be manufactured without using highly rigid members for the functional unit 2d1, the functional unit 2d2, and the housing 3 in order to efficiently transmit the force from the fulcrum to the action point. can reduce costs.

In the present embodiment, the work is divided into two work: the work of inserting the functional unit 2d1 or the functional unit 2d2 into the housing 3, and the work of connecting the contactor 6d1 or the contactor 6d2 to the bus connection portion 5 by the contactor connection mechanism. By being connected, the direct bus 4 is electrically connected to the functional unit 2d1 or the functional unit 2d2. Therefore, functional unit 2d1 or functional unit 2d2 and bus 4 can be electrically connected easily with a smaller insertion/removal force than in the first embodiment in which the above operations are performed simultaneously. In particular, in the case of the functional unit 2d1 or the functional unit 2d2 that performs opening/closing control and protection of a large-capacity electric motor circuit, the electrical equipment to be accommodated is large and heavy, so the functional unit 2d1 or the functional unit 2d2 is also large and heavy. Therefore, the operator can insert and remove more easily than in the first embodiment.

Further, as in the third embodiment, in the present embodiment, the direction in which the functional unit 2d1 or the functional unit 2d2 is inserted into the housing 3 and the direction in which the busbar connection portion 5 and the contactor 6d1 or the contactor 6d2 are connected are different. in a different direction. As a result, even if a force is applied to the functional unit 2d1 or the functional unit 2d2 from the housing 3 in the Y direction (the direction in which the functional unit 2c is detached from the housing 3), the bus line connection portion 5 and the contactor 6d1 or Even if the connection point with the contactor 6d2 shifts in the Y direction, disconnection is suppressed. Furthermore, since the functional unit 2d1 or the functional unit 2d2 is sandwiched by another functional unit in the Z direction, even if a force is applied to the functional unit 2c in the Z direction, the functional unit 2d1 or the functional unit 2d2 itself will not It cannot move in the Z direction because it is sandwiched between the partition plates that make up the functional unit. Therefore, disconnection between the busbar connection portion 5 and the contactor 6d1 or the contactor 6d2 in the Z direction is suppressed.
Also, for example, if the connection between the busbar connection and the contactor is released due to the impact of a short-circuit accident that occurs while power is being supplied to a load such as a motor via the functional unit, the connection between the busbar connection and the contactor will Arc discharge occurs in the air gap created between them, and there is a risk of inducing an arc discharge accident. According to the present embodiment, disconnection between the busbar connection portion 5 and the contactor 6d1 or the contactor 6d2 is suppressed, so that an arc discharge accident can be suppressed.

In addition, in the present embodiment, the first functional unit 2d1 and the second functional unit 2d2 share the busbar connection portion 5, so that the busbar connection portion protective cover 7 for the second functional unit 2d2 and the The busbar connection part 5 becomes unnecessary. Therefore, since the second functional unit 2d2 does not accommodate the busbar connection protection cover 7 and the busbar connection 5, the size of the second functional unit 2d2 can be reduced. As a result, the number of functional units that can be accommodated in the housing 3 can be increased.

1a, 1b, 1c, 1d Control center 2a, 2b, 2c, 2d1, 2d2 Functional unit 3 Housing 4 Busbar 5 Busbar connection 6a, 6b, 6c, 6d1, 6d2 Contact 7 Busbar connection protection cover 8 Handle 9 Contact moving part 20 Insertion/extraction handle

Claims (8)

a functional unit having an electric device electrically connected to an external electric motor and controlling the electric motor, and a contact for supplying electric power to the electric device;
a housing that accommodates a plurality of the functional units in such a manner that they can be inserted and removed from the front;
a busbar extending in a first direction in which the functional units housed in the housing are arranged and arranged on the rear side of the housing;
The functional units are arranged between the front surface of the housing and the busbars and extend in a second direction, which is the inserting/removing direction of the functional unit. a busbar connecting portion connected to the contactor of the functional unit accommodated in the body;
a busbar connection protection cover disposed in the housing to accommodate the busbar connection and having openings on each of the rear surface side and the front surface side;
with
The busbar connecting portion is connected to the busbar through the opening on the back side,
The contact is connected to the busbar connecting portion through the opening on the front side. The busbar is
The control center according to claim 1, wherein a plurality of control centers are arranged in a third direction perpendicular to each of the first direction and the second direction. The contactor is
2. The control center of claim 1, fixed in position within the functional unit connected to the busbar connection. The busbar connection protection cover,
The control center according to any one of claims 1 to 3, wherein the control center is made of light-transmitting resin. The busbar connection protection cover,
4. The control center according to any one of claims 1 to 3, further comprising an inspection window through which a state of the connecting portion between the busbar connecting portion and the contactor can be visually confirmed. a functional unit having an electric device electrically connected to an external electric motor and controlling the electric motor, and a contact for supplying electric power to the electric device;
a housing that accommodates a plurality of the functional units in such a manner that they can be inserted and removed from the front;
a busbar extending in a first direction in which the functional units housed in the housing are arranged and arranged on the rear side of the housing;
The functional units are arranged between the front surface of the housing and the busbars and extend in a second direction, which is the inserting/removing direction of the functional unit. a busbar connecting portion connected to the contactor of the functional unit accommodated in the body;
A contact that moves the contact in the functional unit between a first position that is not connected to the busbar connection and a second position that is connected to the busbar connection. a contactor connection mechanism including a moving portion and a handle portion for moving the contactor moving portion;
with
The contactor is
A control center that is not connected to the busbar connection portion when in the first position and is connected to the busbar connection portion when in the second position. The contactor is
7. The control center according to claim 6, wherein the contactor is moved in the first direction or the second direction by the contactor connection mechanism so as to be connected to the busbar connection portion at the second position. a functional unit having an electric device electrically connected to an external electric motor and controlling the electric motor, and a contact for supplying electric power to the electric device;
a housing that accommodates a plurality of the functional units in such a manner that the functional units can be inserted and removed from the front;
a busbar extending in a first direction in which the functional units housed in the housing are arranged and arranged on the rear side of the housing;
The functional units are arranged between the front surface of the housing and the busbar and extend in a second direction, which is the inserting/removing direction of the functional unit, one of which is fixed to each of the busbars, and the other of which is fixed to the housing. a busbar connection portion connected to the contactor of the functional unit housed in the body;
with
In a first functional unit and a second functional unit, which are two functional units arranged consecutively in the first direction among the functional units,
The busbar connection is arranged between the first functional unit and the second functional unit,
A first contact of the first functional unit is moved toward the second functional unit by a first contact connecting mechanism of the first functional unit, thereby connecting the bus line connection portion. connected and
A second contactor of the second functional unit is moved toward the first functional unit by a second contactor connection mechanism of the second functional unit, thereby connecting the busbar connection portion with the second contactor. Connected control center.

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