KR102264775B1 - Interlock device of motor control panel - Google Patents

Abstract

The present invention relates to an interlock device of a motor control panel which safely withdraws and embeds a withdrawal unit by operating a unit withdrawal means by moving the interlock means left and right according to on/off of an operation handle. More specifically, the interlock means smoothly provides a left and right horizontal movement operation of the interlock means by linking a vertical operation bar and a horizontal operation bar that are vertically or horizontally gear-engaged with a circular gear of a handle shaft and a lower part of the vertical operation bar can be safely used by a stop structure that restricts movement of the withdrawal unit when the operation handle is turned on, thereby providing excellent operational reliability and safety.

Description

Interlock device of motor control panel

The present invention relates to an interlock device for an electric motor control panel that safely withdraws and withdraws a withdrawal unit by operating a unit withdrawal means by left and right movement of the interlock means according to on/off of an operation handle, and more particularly, the interlock means is geared The present invention relates to an interlock device for a control panel of an electric motor that works in conjunction with a structure that interlocks by meshing and a stop structure that restricts the drawing-out and drawing-in operations of the take-out unit to operate more safely and smoothly.

A general low voltage motor control panel is a centralized control system, and is a device used in general and special industrial facilities such as power plants, petrochemical plants, cement plants, water treatment plants, and steel plants, or marine plants or ships.

This low voltage motor control panel is widely used for the purpose of starting, stopping, and protecting the motor that provides power in various industrial facilities, such as a distribution busbar, a distribution device and a tertiary control plug. The withdrawal unit including the plug, secondary power plug, tertiary control plug, panel and operating knob can be connected step by step.

The withdrawal unit is drawn in and drawn out by a user, and a connection position, a test position, and a disconnection position are configured according to the withdrawal and withdrawal positions, and the withdrawal unit is drawn out to the disconnection position without stopping at the test position when withdrawing with a strong force. , it could be separated from the control panel of the low voltage motor, so there was a risk of difficulty in positioning and safety.

In particular, the withdrawal unit is equipped with a rail inside the unit holder so that the shaft screw can be drawn out or drawn in along the rail by turning the operation handle. Safety accidents due to sparks occur frequently while operating under a load. There is a problem that a separate interlock device is installed and used in the withdrawal unit.

However, while the interlock device of the take-out unit provides safety, the operation is not simple, and the operator's erroneous operation is caused, and damage to parts caused by such erroneous operation makes it impossible to operate the equipment during the repair time, etc. As a problem, improvement of the interlock device was required.

To solve this problem, the interlock device of Patent Registration No. 10-1708020 includes two links installed inside the front plate and connected by connecting pins in the motor control panel having a plurality of withdrawing units inserted and drawn out by the unit withdrawing means. One end is connected to the switch shaft to move left and right when the operation handle is turned on / off, and when the operation handle is turned off, the circular hole formed in the right part coincides with the handle insertion hole to insert the handle to the shaft. The screw can be rotated, and when the operation handle is turned on, the circular hole moves to the left to block the handle insertion hole, thereby simplifying the withdrawing and withdrawing operations of the take-out unit.

However, the above-described interlock device performs the left and right movement by the link structure when the operation handle is on / off, and the operation load for horizontal movement is generated, and the operation safety or reliability is lowered, and also after the On / Off operation of the operation handle is completed Since there is no separate safety structure that stops the take-out unit in order to withdraw the take-out unit, there is a problem of poor operation safety, such as fear of malfunction.

Registered Patent No. 10-1708020 (February 13, 2017) Registered Patent No. 10-437827 (June 17, 2004)

The present invention was invented to solve all the problems of the prior art, and the interlock means is formed in a structure that interlocks with the handle shaft of the operating handle by gear meshing, and the withdrawing and retracting operations of the withdrawing unit are controlled by the operating handle. The purpose of the on operation is to make it work more safely and smoothly by a stop structure that restricts movement during on operation.

According to the present invention, a plurality of take-out units installed in the enclosure of the motor control panel to transmit power to the motor by supplying power are drawn out and drawn in when necessary, wherein the draw-out unit is installed inside the unit holder, and the draw-out unit is installed. An operation handle connected to the circuit breaker body and the handle shaft is installed in the front, and an interlock means is connected to the handle shaft and the interlock means horizontally moves left and right by the ON/OFF rotation operation of the operation handle, and the operation part of the unit withdrawal means is installed. in opening to allow the withdrawing unit to be drawn out and drawn out;

The interlock means is engaged with a circular gear shaft installed on the handle shaft by a gear unit in the vertical direction of the circular gear and moves up and down by rotation of the circular gear, but the lower end moves in and out of the fixing hole of the unit holder A vertical operation bar to restrict movement or movement of the withdrawal unit while it is horizontally connected to the vertical operation bar and interlocking with the elevating movement of the vertical operation bar to move horizontally to the left and right, opening the operation part of the unit withdrawal means by a through hole on one side It is characterized in that it is composed of a horizontal operation bar to operate the withdrawal and withdrawal operations of the withdrawal unit.

According to the present invention, a slide pin is installed on the vertical operation bar, and a slide pin is inserted into the horizontal operation bar to form a guide hole that is inclined to the left and right so that the slide pin operates horizontally when the vertical operation bar moves up and down. It is characterized in that the horizontal operation bar is configured to move horizontally to the left and right while being guided by the guide long hole of the bar.

According to the present invention, the interlock means is engaged with a circular gear shaft installed on the shaft of the handle, and the gear unit in the horizontal direction of the circular gear, and moves horizontally to the left and right by the rotation of the circular gear, and the unit is formed by a hole on the right side. A horizontal operation bar that opens the operation part of the withdrawal means to operate the withdrawal and withdrawal operations of the withdrawal unit, and the upper end of the horizontal operation bar and the inclined surface formed below the protrusion on the left side of the horizontal operation bar are elastically pressed by the elastic force of the tension spring However, it is characterized in that the vertical operation bar is configured such that, when the horizontal operation bar moves left and right horizontally, the upper end is inclined to the inclined surface while the lower end is operated to move or move the withdrawal unit in the fixing hole of the holder to limit the movement or movement.

According to the present invention, the interlock means horizontally moves to the left and right by the ON/OFF rotation operation of the operation handle to withdraw or block the operation part of the unit withdrawal means to withdraw and withdraw the withdrawal unit, but the interlock means is a circular gear of the handle shaft and The link operation between the vertical operation bar and the horizontal operation bar, which are vertically or horizontally gear-engaged, not only provides a smoother left and right horizontal movement operation of the interlock means, but also restricts the movement of the withdrawal unit when the lower portion of the vertical operation bar is turned on when the operation handle is turned on. It can be used safely due to the stop structure, and thus has an excellent effect of operational reliability and safety.

1 is a front view showing a motor control panel to which the present invention is applied.
Fig. 2 is a side cross-sectional view of Fig. 1;
3 is a plan cross-sectional view showing the take-out unit of the motor control panel to which the present invention is applied.
4 is a front view and a plan view of a main part showing the interlock means of FIG. 3 .
5 is a front view and a plan view of the main part showing the operating state of FIG.
Fig. 6 is an excerpted perspective view of the main part of Fig. 3;
Figure 7 is an exploded perspective view of the main part of Figure 6;
FIG. 8 is a plan cross-sectional view showing another embodiment of FIG. 3 .
9 is a front view and a plan view showing the interlock means of FIG. 8;
Figure 10 is a front view and a plan view showing the main part of the operating state of Figure 9;

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The interlock device of the motor control panel of the present invention is installed in the enclosure 1a of the motor control panel 1 as shown in FIGS. 1 to 10 to transmit power to the motor with the supplied power. The withdrawal unit 2 is inserted and installed in the unit holder 3, and an operation handle 7 connected to the circuit breaker body 5 and the handle shaft 6 is installed in front of the withdrawal unit, , the interlock means 100 is connected to the handle shaft 6 and the interlock means horizontally moves to the left and right by the ON/OFF rotation operation of the operation handle to open the operation part of the unit withdrawal means 8 to open the withdrawal unit (2) ) to configure the fetch and retrieval operations.

In particular, as in the embodiment of FIGS. 3 to 7 and the embodiment of FIGS. 8 to 10 , the interlock means 100 vertically or horizontally orients the gear meshing structure to increase the size and internal space utilization of the take-out unit 2 . It is divided so as to form horizontally.

That is, the interlock means 100 of FIGS. 3 to 7 has a gear meshing structure in a vertical direction, and is composed of a circular gear 10 , a vertical operation bar 20 , and a horizontal operation bar 30 .

The circular gear 10 is axially installed on the handle shaft 6 of the electric motor switch and is configured to drive forward and reverse rotation during ON/OFF rotation operation of the operation handle 7 .

The vertical operation bar 20 and the horizontal operation bar 30 are installed on the interlock support 60 .

The vertical operation bar 20 is meshed by the gear unit 21 in the vertical direction of the circular gear 10 and is configured to move up and down by rotation of the circular gear. The vertical operation bar 20 is raised and lowered when the operation handle is turned OFF, and the vertical operation bar 20 is lowered when the operation handle is ON.

At this time, the lower end 22 of the vertical operation bar 20 is configured to move or limit the movement of the withdrawal unit 2 while operating in and out of the fixing hole 3a of the unit holder.

The horizontal operation bar 30 is horizontally connected to the vertical operation bar 20 to move horizontally to the left and right while interlocking the lifting and lowering movement of the vertical operation bar, and the unit withdrawal means 8 by the through hole 31 on one side. It is configured so that the drawing-out and drawing-in operations of the take-out unit 2 can be operated by opening the operating part of the .

Here, a slide pin 25 is axially installed on the vertical operation bar, and a slide pin 25 is inserted into the horizontal operation bar to form a guide long hole 35 inclined to the left and right, so that the slide pin is connected to the vertical operation bar. It is configured to move the horizontal operation bar horizontally left and right while being guided by the guide long hole 35 of the horizontal operation bar when moving up and down.

And a slide bolt 34 is coupled to the horizontal operation bar 30 to guide horizontal movement, and the vertical operation bar 20 and the horizontal operation bar 30 are attached to the vertical operation bar to guide vertical and horizontal movement. forms a vertical guide hole 26 through which the lever bolt 62 installed in the interlock support 60 is guided, and the lever bolt 36 guides to the horizontal guide hole 63 of the interlock support 60 in the horizontal operation bar. It is configured by installing the axis.

In addition, the interlock means 100 of FIGS. 8 to 10 has a gear meshing structure in the horizontal direction, and the structure of the vertical operation bar and the horizontal operation bar is different from that of the above-described embodiment.

That is, the horizontal operation bar 40 is engaged by the gear unit 41 in the horizontal direction of the circular gear 10 and moves horizontally to the left and right by the rotation of the circular gear, and the unit is drawn out by the through hole 42 on the right side. By opening the operating part of the means (8), it is configured to operate the withdrawal and withdrawal operations of the take-out unit (2).

And of course, the horizontal operation bar 40 may be integrally bent, or may be divided into two parts as shown in the drawing and assembled by fastening bolts.

In addition, the vertical operation bar 50 has a horizontal surface 45a formed under the protrusion 45 on the left side of the horizontal operation bar and an inclined surface 45b behind the horizontal surface by the elastic force of the tension spring 53 to the upper end ( 51) is installed so that it is elastically attached, but when the horizontal operation bar 40 moves horizontally, the upper end 51 is inclined to the inclined surface 45b, so that the lower end 52 moves in and out of the fixing hole 3a of the holder. It is composed of a vertical operation bar 50 to move or limit the movement of the withdrawal unit (2).

At this time, the upper end of the tension spring 53 is connected to the support 60 ′ and the lower end is connected to the vertical operation bar 50 so that the upper end 51 of the vertical operation bar is located on the horizontal surface 45a of the vertical operation bar. It is configured to move the vertical actuating bar 50 to a lowered position while being tensioned, and to elevate and lower the vertical actuating bar 50 while elastically contracting when positioned on the inclined surface 45b.

As a non-explanatory reference number, 35' is a horizontal guide hole for guiding the horizontal movement of the slide bolt 34, 44 is a lever bolt shaft installed on the horizontal operation bar 40 to guide horizontal movement to the horizontal guide hole 64 of the support, Reference numeral 54 denotes a lever bolt axially installed on the vertical operation bar 50 to be guided up and down to the vertical guide hole 65 of the support.

Next, we will look at the operation and operation of the present invention configured as described above.

In the present invention, a plurality of take-out units 2 are installed in the enclosure 1a of the motor control panel 1 and used to transmit power to the motor with the power supplied to each take-out unit. ) is used to draw out and draw in the take-out unit (2).

First, in order to withdraw and withdraw the withdrawal unit 2 in the embodiment of FIGS. 3 to 7 , the operation handle 7 is switched from the ON state to the OFF position to cut off the power of the circuit breaker.

In this way, while rotating the operating handle 7 to the off position, the handle shaft 6 of the operating handle and the circular gear 10 provided on the handle shaft are rotated forward.

As described above, as the circular gear 10 rotates forward, the vertical operation bar 20 meshed with the circular gear 10 by the gear unit 21 is vertically elevated.

At this time, the lower end 22 of the vertical operation bar is inserted into the fixing hole 3a of the unit holder to move out of the fixing hole 3a by elevating the vertical operation bar at the stop position that restricts the movement of the withdrawal unit 2 . The withdrawal unit 2 will be in a movable state.

That is, the stop operation by the lower end 22 of the vertical operation bar 20 prevents the withdrawal unit 2 from being pulled out due to an erroneous operation while the electric motor is on.

As such, when the vertical operation bar 20 is vertically raised by the off operation of the operation handle, the horizontal operation bar 30 is horizontally moved to the right in conjunction with the vertical operation bar.

This is to move the horizontal operation bar 30 to the right by the lifting operation of the vertical operation bar while the slide pin 25 of the vertical operation bar is inserted and guided into the guide long hole 35 that is inclined left and right to the horizontal operation bar. .

In addition, the slide bolt 34 of the horizontal operation bar 30 is horizontally guided to the horizontal guide hole 35 ′ as well as the horizontal guide hole 35 of the horizontal operation bar is horizontally guided along the lever bolt 36 . The operation bar 30 will move horizontally to the right.

As described above, as the horizontal operation bar 30 moves horizontally to the right, the through hole 31 on the right side of the horizontal operation bar opens the operation part of the unit withdrawing means 8 .

When the operation part of the unit withdrawal means 8 is opened in this way, the operator inserts the operation handle through the through hole 31 of the horizontal operation bar and rotates the operation portion of the unit extraction means 8 to operate the unit holder 3 ) to withdraw the withdrawal unit (2) forward.

In this way, after completing maintenance and other necessary work by drawing out the take-out unit 2 forward, the take-out unit 2 is moved to the unit holder 3 by reversely rotating the operating part of the unit drawing means 8 again. It will be retracted in its original position.

As such, when the pull-out unit 2 is retracted to its original position and the operation handle 7 is reversely rotated from the off state to the on state again, the handle shaft 6 and the circular gear 10 are reversely rotated and are geared to the circular gear. The vertical operation bar 20 meshed with the part 21 is vertically descended and moved to the original position.

In this way, as the vertical operation bar 20 is lowered to its original position, the lower end 22 of the vertical operation part is again inserted into the fixing hole 3a of the unit holder to limit the movement of the withdrawal unit 2, and the vertical operation bar ( 20), the slide pin 25 of the horizontal operation bar 30 is guided to the guide long hole 35 of the vertical operation bar by lowering to the original position to move backward to the original position.

As described above, while the horizontal operation bar 30 moves backward to the original position, the through hole 31 on one side is positioned outside the operation part of the unit withdrawing means 8 to prevent the operator from erroneous operation.

In addition, in the case of the embodiment of Figs. 8 to 10, the operation handle 7 is rotated to the off position in order to withdraw and withdraw the withdrawal unit 2, and the handle shaft 6 of the operation handle and the handle shaft are attached to the handle shaft. The circular gear 10 on which the shaft is installed rotates forward.

As described above, while the circular gear 10 rotates forward, the horizontal operation bar 40 meshed with the circular gear 10 by the gear part 41 is horizontally moved to the right.

At this time, the upper end 51 of the vertical operation bar 50 to the lower horizontal surface 45a of the protrusion 45 on the left side of the horizontal operation bar 40 is in elastic contact with the tension spring 53 while tensioning it. As the horizontal operation bar 40 moves horizontally to the right, the upper end 51 is inclined and guided by the elastic force of the tension spring 53 on the inclined surface 45b behind the horizontal plane to ascend and descend.

As described above, while the vertical operation bar 50 is raised and lowered, the lower end 52 is out of the fixing hole 3a of the unit holder, and the withdrawal unit 2 is in a movable state.

As described above, the horizontal operation bar 40 moves horizontally to the right by the off operation of the operation handle, and the unit withdrawal means 8 is opened by the through hole 42 on the right side of the horizontal operation bar.

When the operation portion of the unit withdrawal means 8 is opened as described above, the operator inserts the operation handle through the through hole 42 of the horizontal operation bar to rotate the operation portion of the unit withdrawal means 8 to rotate the extraction unit ( 2) will be drawn forward.

In this way, after completing maintenance and other necessary work by drawing out the take-out unit 2 forward, the take-out unit 2 is moved to the unit holder 3 by reversely rotating the operating part of the unit drawing means 8 again. It will be retracted in its original position.

In this way, when the operation handle 7 is reversely rotated from the OFF state to the ON state after the take-out unit 2 is brought into the original position, the handle shaft 6 and the circular gear 10 are reversely rotated and the gears are geared to the circular gear. The horizontal operation bar 40 engaged with the part 41 is to move horizontally to the original position to the left.

As such, when the horizontal operation bar 40 moves horizontally to the left to the original position, the upper end 51 of the vertical operation bar 50 is inclined from the inclined surface 45b of the protrusion 45 to the horizontal surface 45a, and the tension spring While tensioning (53), it descends vertically and moves to the original position.

As such, when the vertical operation bar 50 moves vertically downward to the original position, the lower end 52 is again inserted into the fixing hole 3a of the unit holder to limit the movement of the withdrawal unit 2 .

And by moving the horizontal operation bar 40 back to its original position, the through hole 42 on the right side deviates from the position of the operation part of the unit withdrawal means 8 to prevent the operator from performing a erroneous operation.

Therefore, in the interlock device of the present invention, the horizontal operation of the interlock means 100 is moved horizontally by the interlocking operation of the vertical operation bar and the horizontal operation bar that are vertically or horizontally gear-engaged with the circular gear 10 installed on the handle shaft of the operation handle. In addition to providing more smoothly, the lower portion of the vertical operation bar can be safely used by a stop structure that restricts the movement of the withdrawal unit when the operation handle is turned on.

1: Control panel 1a: Enclosure
2: Draw-out unit 3: Unit holder
3a: fixing hole 5: circuit breaker body
6: handle shaft 7: operation handle
8: unit withdrawal means 10: circular gear
20, 50: vertical operation bar 21, 41: gear unit
22: lower part 25: slide pin
30, 40: horizontal operation bar 35: guide long hole
31, 42: through hole 45: protrusion
45a: horizontal plane 45b: inclined plane
51: upper end 52: lower end
53: tension spring 100: interlock means

Claims (3)

A plurality of take-out units (2) installed in the enclosure (1a) of the motor control panel (1) and transmitting power to the motor with supplied power are configured to withdraw and draw-in when necessary, wherein the take-out unit (2) is a unit holder ( 3), and install the operation handle 7 connected to the breaker body 5 and the handle shaft 6 in front of the withdrawal unit, and connect the interlock means 100 to the handle shaft 6 An interlock device for a motor control panel that is installed to open the operation part of the unit withdrawal means 8 while horizontally moving left and right by turning the operation handle ON/OFF, so that the withdrawal unit 2 can be drawn out and drawn in. In
The interlock means 100 includes a circular gear 10 axially installed on the handle shaft 6,
The circular gear 10 is engaged by the gear unit 21 in the vertical direction and moves up and down by the rotation of the circular gear, but the lower end 22 is drawn out while moving in and out of the fixing hole 3a of the unit holder. A vertical operation bar 20 for limiting movement or movement of the unit 2, and a through hole on one side while horizontally moving left and right by being horizontally connected to the vertical operation bar 20 and interlocking with the elevating movement of the vertical operation bar ( 31) to open the operation part of the unit withdrawal means 8 to operate the withdrawal and withdrawal operations of the withdrawal unit 2 by means of a horizontal operation bar 30;
A slide pin 25 is axially installed on the vertical operation bar, and a slide pin 25 is inserted into the horizontal operation bar to form a guide long hole 35 that is inclined to the left and right, so that the slide pin is mounted on the vertical operation bar. An interlock device for a motor control panel, characterized in that it is configured to move the horizontal operation bar horizontally to the left and right while being guided by the guide long hole (35) of the horizontal operation bar when moving down.
delete A plurality of take-out units (2) installed in the enclosure (1a) of the motor control panel (1) and transmitting power to the motor with supplied power are configured to withdraw and draw-in when necessary, wherein the take-out unit (2) is a unit holder ( 3), and install the operation handle 7 connected to the breaker body 5 and the handle shaft 6 in front of the withdrawal unit, and connect the interlock means 100 to the handle shaft 6 An interlock device for a motor control panel that is installed to open the operation part of the unit withdrawal means 8 while horizontally moving left and right by turning the operation handle ON/OFF, so that the withdrawal unit 2 can be drawn out and drawn in. In
The interlock means 100 includes a circular gear 10 axially installed on the handle shaft 6,
The circular gear 10 is engaged by the gear part 41 in the horizontal direction and moves horizontally to the left and right by the rotation of the circular gear while opening the operating part of the unit withdrawal means 8 by the through hole 42 on the right. a horizontal operation bar 40 for operating the withdrawal and withdrawal operations of the withdrawal unit 2; and
The horizontal operation bar is installed so that the upper end 51 is in elastic contact with the elastic force of the tension spring 53 on the horizontal surface 45a and the inclined surface 45b formed below the protrusion 45 on the left side of the horizontal operation bar, but the horizontal operation bar When the horizontal movement of the left and right of the 40, the upper end 51 is guided to the inclined surface 45b while the lower end 52 moves in and out of the fixing hole 3a of the holder so as to move or limit the movement of the take-out unit 2 Interlock device of the motor control panel, characterized in that composed of the operation bar (50).

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