KR20100107525A

KR20100107525A - Control center

Info

Publication number: KR20100107525A
Application number: KR1020107020076A
Authority: KR
Inventors: 도시히코 미야우치
Original assignee: 미쓰비시덴키 가부시키가이샤
Priority date: 2008-02-14
Filing date: 2008-07-14
Publication date: 2010-10-05
Also published as: TWI389411B; KR101260114B1; CN101953043B; JP2012110229A; WO2009101717A1; TW200935696A; JPWO2009101717A1; CN101953043A; JP4950309B2; JP5340442B2

Abstract

An I / O circuit 2316, a control circuit 2317, a display circuit 2318, and a power supply circuit part 2315 formed on the substrate are disposed between the openable front panel 2313 and the rear panel 2314 of the control unit 23. A bridge circuit 23151 of the power supply circuit section 2315 is formed on a power supply circuit board 2154 in a power supply cover 23153, and a smoothing capacitor 23152 of the power supply circuit section 2315 is provided on the power supply cover. Since it is attached to the detachable capacitor attaching cover 23155, the maintenance check of the smoothing capacitor of the power supply circuit portion can be easily performed.

Description

Control Center {CONTROL CENTER}

The present invention converts an alternating current stepped down to a predetermined voltage from a bridge circuit to a direct current, and converts the direct current output of the bridge circuit into a smooth direct current in a smoothing capacitor, their power source for an I / O circuit, a control circuit, and a display circuit formed on a substrate. It relates to a control center in which a power supply circuit portion to be provided as a control unit is incorporated in a control unit.

The control unit which comprises each of the some nibs which comprise a control center is shown by Unexamined-Japanese-Patent No. 6-153333 (patent document 1), for example. Although the power supply circuit part is not shown by this patent document 1, in many products, a power supply circuit part is provided in a control unit in many cases.

In large factories and the like, a large number of conveyor motors, a large number of pump motors, and a large number of fan motors are provided, and load state monitoring and control of such a large number of motor loads is performed in a large control center composed of a plurality of nibs.

Patent document 1: Unexamined-Japanese-Patent No. 6-153333 (drawing and description in summary)

In a large control center composed of a plurality of nibs which perform load state monitoring and control of a large number of motor loads, the number of control units constituting the nibs is large, thus increasing the number of power supply circuit portions. However, the power supply circuit section has a built-in smoothing capacitor such as an electrolytic capacitor that smoothes the DC output of the bridge circuit, and the smoothing capacitor such as the electrolytic capacitor is about 50% longer than other components, depending on the operating environment temperature. It is desirable to be able to check and repair alone.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and I / I formed by converting alternating current stepped down to a predetermined voltage from a bridge circuit to a direct current, and converting the direct current output of the bridge circuit into a smooth capacitor in a form of I / I A control center in which a power supply circuit portion for supplying O circuits, control circuits, and display circuits as their power supplies is incorporated in a control unit, and an object thereof is to facilitate maintenance of the smoothing capacitor of the power supply circuit portion.

The control center according to the present invention converts an AC stepped down to a predetermined voltage from a bridge circuit into a direct current, and converts the direct current output of the bridge circuit into a smooth direct current by a smoothing capacitor. A control center incorporating a power supply circuit portion for supplying the display circuits as power to them in a control unit,

The I / O circuit, the control circuit, the display circuit and the power supply circuit portion are provided between a front panel and a back panel which can be opened and closed of the control unit,

The bridge circuit of the power circuit portion is formed on a power circuit board in a power cover;

The smoothing capacitor of the power supply circuit portion is attached to a capacitor mounting cover detachable to the power supply cover.

The present invention converts an alternating current stepped down to a predetermined voltage from a bridge circuit to a direct current, and converts the direct current output of the bridge circuit into a smooth direct current in a smoothing capacitor, their power source for an I / O circuit, a control circuit, and a display circuit formed on a substrate. A control center incorporating a power supply circuit portion supplied as a control unit in a control unit, wherein the I / O circuit, the control circuit, the display circuit, and the power supply circuit portion are provided between an openable front panel and a rear panel of the control unit. Since the bridge circuit of the power supply circuit portion is formed on the power supply circuit board in the power supply cover, and the smoothing capacitor of the power supply circuit portion is mounted on the capacitor mounting cover detachable to the power supply cover, the AC stepped down to a predetermined voltage is applied to the bridge circuit. Converts to DC and smoothes DC output of the bridge circuit in a smoothing capacitor In a control center in which a power supply circuit portion for supplying the same type of power to an I / O circuit, a control circuit, and a display circuit formed on a substrate as their power source is incorporated in the control unit, the maintenance inspection of the smoothing capacitor of the power supply circuit portion can be easily performed. There is.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a connection diagram exemplarily illustrating an example of a control center concept.
FIG. 2 is a diagram showing Embodiment 1 of the present invention, wherein a load state monitoring screen displaying a load state is displayed on a front panel of a control unit constituting each of a plurality of nibs, and an abnormality located in the vicinity of the load state monitoring screen. (Iii) A perspective view schematically illustrating an example of the appearance of a control center having a display device.
3 is a diagram showing Embodiment 1 of the present invention, and is a front view of the control unit illustrated in FIG. 1.
4 is a diagram showing Embodiment 1 of the present invention, and is a plan view of the control unit illustrated in FIG. 1.
FIG. 5 is a diagram showing Embodiment 1 of the present invention, and is an enlarged cross-sectional view showing an example of an internal configuration of the electronic device unit of the control unit in which the cross section is viewed in the arrow direction along the line V-V in FIG. 3.
FIG. 6 is a diagram showing Embodiment 1 of the present invention, and is an enlarged cross-sectional view showing a portion of the abnormality display device further enlarged in FIG. 5.
It is a figure which shows Embodiment 1 of this invention, and is an external view which looked at the part which surrounds the light transmission part of the lens of the abnormality display apparatus in FIG. 6 from the back side.
FIG. 8 is a diagram showing Embodiment 1 of the present invention, and is an external view of a light source of the abnormality display device viewed from the front side in FIG. 6.
9 is a diagram showing Embodiment 1 of the present invention, and is a perspective view of a lens of the anomaly display apparatus.
Fig. 10 is a diagram showing Embodiment 1 of the present invention and is a connection diagram showing an example of a power supply circuit.
Fig. 11 is a diagram showing Embodiment 1 of the present invention, and is a plan view showing an example of an external appearance of a power supply circuit portion incorporated in a control unit.
It is a figure which shows Embodiment 1 of this invention, and is a longitudinal rear view which looked at the cross section in the arrow direction in the VIII-VIII line | wire of FIG.
It is a figure which shows Embodiment 2 of this invention, and is a longitudinal rear view corresponding to FIG. 11 which looked at the cross section in the arrow direction in the VIII-VIII line | wire of FIG.

Embodiment 1.

Hereinafter, Embodiment 1 of this invention is described with reference to FIGS. In addition, during each, the same match represents the same part.

First, FIG. 1 which illustrates an example of the control center concept in a circuit, and a load state monitoring screen displaying a load state on the front panel of the control unit constituting each of the plurality of nibs, and in the vicinity of the load state monitoring screen The concept of a control unit is demonstrated by FIG. 2 which illustrates schematically an example of the external appearance of the control center provided with the abnormality display apparatus located.

As shown in Fig. 1 and Fig. 2, in a large-scale factory or the like, a plurality of relatively large motors 1, such as a plurality of conveyor motors, a plurality of pump motors, and a plurality of fan motors, are provided. The load state monitoring and control of such a large number of motor loads is carried out in a large control center 2 composed of a plurality of nibs.

The control center 2 includes, for example, a load state detection sensor 21 such as a current transformer for detecting a motor load current, a contactor 22 such as an electromagnetic contactor for opening and closing a motor main circuit, and a load state detection sensor 21. A plurality of heat plates 24 including a control unit 23 for inputting an output and performing load state monitoring and control of a motor load (including opening and closing of the motor main circuit by the contactor 22) are provided. 2 shows an example in which there are twelve nibs 24 and six control units 23 in each nirvana.

Each control unit 23 has an electronic device unit 231, and the electronic device unit 231 has a load state monitoring screen 2311 for displaying a load state, an abnormality display device 2312, and the like. In other words, the control unit 23 has a load state monitoring screen 2311, an abnormality display device 2312, and the like.

FIG. 2 shows the electronic device unit 231 of the control unit 23 at the top of the innermost nib, the farthest from the passage AA in the storage building A of the control center 2, the load state monitoring screen 2311 and the abnormal display device ( Although the coincidence of 2312 is shown by the leader line, the control unit 23 can be distinguished from the drawings by the electronic device unit, the load state monitoring screen, and the abnormality display device, and thus the illustration of the coincidence is omitted. . Similarly, since each control unit 23 can also be discriminated from the figure, only the innermost nirvana 24 farthest from the passage AA shows the matching of the control units 23, and the others are omitted.

As shown in FIG. 3 which is a partial front view of the electronic device unit 231 of the control unit 23, and FIG. 4 which is a partial plan view of the electronic device unit 231 of the control unit 23, an electronic device unit is shown. On the front panel of 231, on / off of the target motor 1 (see FIG. 1) in addition to the abnormality display device 2312 located in the vicinity of the load state monitoring screen 2321 (contactor 32 (see FIG. 1)) Operation buttons 2313 for performing operations such as the opening and closing of the control panel), a setting operator 2314 for setting an abnormal level in a load state, and the like.

Although the above-described display device 2312 is described in detail later, the lens 23121 formed of, for example, a light-transmissive plastic for display of the whole is, for example, the lens 231211 for the on display and the off display. Lens 231212, lens 231213 for abnormality indication of the load state, and lens 231214 for operation error display in the control unit 23 (including the electronic device unit 231). . Incidentally, in the illustrated example, such lenses 231211, 231212, 231213, and 231214 are arranged in a line up and down at predetermined intervals, and are all from the front surface of the electronic device unit 231 (that is, the front surface of the control unit 23). It protrudes by the predetermined length toward the front (refer FIG. 4).

As the internal structure of the electronic device unit 231 of the control unit 23 illustrates an example in FIG. 4, which is an enlarged cross-sectional view of the cross section viewed along the line V-V in FIG. 3, the front panel 2313 is illustrated. , Back panel 2314, power circuit section 2315, I / O circuit board 2316, control circuit board 2317, display circuit board 2318, connectors 2319, 2320, 2321, 2322, 2323, liquid crystal The display panel 2324, the backlight 2325 of the liquid crystal display panel, the transparent window 2326, and the hinge 2327 are provided.

The front panel 2313 constitutes the front panel of the control unit 23, and is formed of a light impermeable resin or the like.

The back panel 2314 is made of resin or the like, and the load state detection sensor 21, the contactor 22, and the like built in the control unit 23 are disposed on the back surface side thereof.

The power supply circuit unit 2315 is a power supply circuit for supplying DC power to each of the substrates 2316, 2317, and 2318. An example of the connection diagram is a predetermined voltage in the step-down transformer 25, as illustrated in FIG. 10. And converts the alternating current into direct current by the built-in bridge circuit (orthogonal conversion circuit; 23151), and converts the direct current output of the bridge circuit 23151 into a built-in smoothing capacitor (e.g., an electrolytic capacitor). 23152 has a function of smoothing, the smoothed direct current is regulated to a predetermined direct current output voltage by the electrostatic source regulator 23157 and the negative power supply regulator 23158, and further stabilized by the output stabilization capacitor 23159, Power of the stabilized DC output voltage is supplied to each of the substrates 2316, 2317, and 2318. The detailed structure of the power supply circuit unit 2315 will be described later.

The I / O circuit board 2316 is a substrate on which a so-called input / output circuit is formed, and inputs a load state information signal (analog signal) detected by the load state detection sensor and inputs a digital load to the control circuit board 2317. It outputs status information signal.

The control circuit board 2317 is a display necessary for the display devices 2311 and 2312 on the load state monitoring screen display device 2311 and the abnormality display device 2312 based on the digital load state information signal input. It is to output the control signal.

The display circuit board 2318 receives the display control signal from the control circuit board 2317, and displays operations of the on, the off, the load state, and the operation error based on the display control signal. A signal is output to the abnormality display device 2312, and a display operation signal such as a measured value of the load state is output to the load state monitoring screen display device 2311.

The connector 2319 connects the detection output signal line of the load state detection sensor 21 and the input terminal of the I / O circuit board 2316.

The connectors 2320 and 2321 connect an output terminal of the I / O circuit board 2316 and an input terminal of the control circuit board 2317, and input / output terminals of both boards without using a harness. It is also called a board-to-board connector because it is a connection between them.

The connector 2322 is provided in the power supply circuit section 2315, and is a terminal for receiving an AC power supply (secondary output of a step-down transformer not shown).

The connector 2323 connects an output terminal of the control circuit board 2317 and an input terminal of the display circuit board 2318, and is the board-to-board connector.

The liquid crystal display panel 2324 is a display panel using liquid crystal, and displays the measured values of the load state and the like based on the display operation signal from the display circuit board 2318.

The backlight 2325 of the liquid crystal display panel is a light source that emits light from the rear surface side of the liquid crystal display panel 2324 toward the liquid crystal display panel 2324, and the display of the liquid crystal display panel 2324 is made clear. .

Further, the light intensity of the backlight 2325 and / or the background color of the liquid crystal display panel 2324 is abnormally sealed based on the display operation signal from the display circuit board 2318 compared to the normal time of the motor load. When the time becomes brighter, even in the case of many nirvana, it becomes easier to see.

The transparent window plate 2326 protects the entire surface of the liquid crystal display panel 2324, and is mounted in an opening of the front panel 2313.

The hinge 2327 is provided in the fixing portion 2328, one end 2313A of the back side of the front panel 2313, and one end 2313A of the front panel 2313 of the back panel 2314. Both sides of one end 2314A on the same side as () are pivoted, and by this pivot, both the front panel 2313 and the back panel 2314 are individually separated from each other and the hinge 2327 is opened. The shaft can be rotated in the direction of the arrow A as an axis. That is, it can open and close with one opening.

When the front panel 2313 is rotated in the direction of an arrow A with the hinge 2227 as an axis (opening surface), the front panel 2313, the display lens 23121 and the transparent window 2326 are the The power supply circuit portion 2315, the I / O circuit board 2316, and the control circuit board, which are integrally rotated and opened in the direction of the arrow A with the hinge 2227 as an axis, and are thus exposed to the outside. 2317, the display circuit board 2318, the connectors 2319, 2320, 2321, 2322, and 2323, the liquid crystal display panel 2324, and the backlight 2325 of the liquid crystal display panel can be checked. have.

Further, when the rear panel 2314 is rotated in the direction of arrow A with the hinge 2327 as the center (open surface), the rear panel 2314, the power supply circuit unit 2315, and the I / O circuit board 2316 are formed. ), The control circuit board 2317, the display circuit board 2318, the connector 2319, 2320, 2321, 2322, and 2323, the liquid crystal display panel 2324, and a backlight 2325 of the liquid crystal display panel, The hinge 2227 is pivotally opened in an integral direction in the direction of the arrow A, and as a result, maintenance inspection of the load state detection sensor 21, the contactor 22, etc., which are exposed to the outside, can be performed. Can be.

6 to 9 will be described in detail with reference to FIGS. 6 to 9. FIG. 6 is an enlarged cross-sectional view illustrating a portion of the abnormal display device 2312 in an enlarged manner in FIG. 5, FIG. 7 is an external view of a portion surrounding the light transmitting part of the lens 23121, and FIG. The external view which looked at the light source 23122 from the front side, and FIG. 9 is a perspective view of the said lens 23121, 231211, 231212, 231213, 231214.

A predetermined distance from the liquid crystal display panel 2324, the backlight 2325 of the liquid crystal display panel and the transparent window 2326 in the vicinity of the load state monitoring screen display device 2311 of the front panel 2313. At a position parallel to the middle direction of the liquid crystal display panel 2324, the backlight 2325 of the liquid crystal display panel and the transparent window 2326, and integrated on the rear surface side from the front panel 2313. The tubular portion 23131 is formed to protrude.

Four (ie, plural) lens mounting through-holes 231311, 231312, which penetrate from the rear surface side of the front panel 2313 to the front side and extend in parallel with each other in the tubular portion 23131, respectively. 231313 and 231314 are provided. The lens mounting through holes 231311, 231312, 231313, and 231314 are all rectangular, such as rectangular, as shown in the shape seen from the back side, and each size is the same.

In other words, it can be said that the cylindrical portion 23131 has a plurality of lens mounting through holes 231311, 231312, 231313, and 231314 that pass through the front panel 2313 back and forth. A cylindrical portion having a through-hole 231311 and a cylindrical portion having a lens-mounting through-hole 231312 and a cylindrical portion having a lens-mounting through-hole 231313 and a lens-mounting through-hole 231314 It can also be said that the cylindrical part is formed integrally.

The on-display lens 231211 is in the lens mounting through hole 231311, the off-display lens 231212 is in the lens mounting through hole 231312, and the lens mounting through hole 231313. The lens 231213 for abnormality indication of the load state is inserted into the lens mounting through hole 231314, and the lens 231214 for displaying an operation error is respectively fixed in the corresponding lens mounting through hole. have.

The light receiving surface 23121S1 of each of the lenses 231211, 231212, 231213, and 231214 is located on the front side from an inner end surface 23131A of the tubular portion 23131, as shown in the figure. A groove 23131B is formed between each of the light receiving surfaces 23121S1 and the inner end surface 23131A of the cylindrical portion 23131. Each of the light-receiving surfaces 23121S1 and 231211, 231212, 231213, 231214 is formed.

The light source 23122 includes an on-display LED 231221 opposed to the on-display lens 231211, an off-display LED 231222 opposed to the off-display lens 231212, and the load. LED 231223 for abnormality display of the load state facing the lens 231213 for abnormality display of the state, and LED 231224 for operation error display in the unit opposed to the lens 231214 for operation error display in the unit Consists of

In the illustrated example, the on-display LED 231221 is composed of three LEDs, green G, red R, and green G arranged at predetermined intervals, and the off-display LED 231222 is arranged at predetermined intervals. It consists of three LEDs of green G, red R, and green G, and the LED 231223 for abnormality indication of the load state is composed of two LEDs of orange O arranged at predetermined intervals, and an operation error in the unit. The LED 231224 for display is composed of one LED that is red.

The on-display LED 231221 of the red R when the on, the off-display LED 231222 of the green G when the off, and the orange O when the load state is abnormal When the LED 231223 for abnormality display of the load state is operating error in the unit, the LED 231224 for operating error display in the unit of the enemy R is driven to display from the display circuit board 2318 respectively. It emits light by a signal.

In the on-display LED 231221, a light emitting surface 23122A at the front end is located in the groove 23131B corresponding to the on-display lens 231211 facing the on-display. LED 231222 has a light emitting surface 23122A at the tip of the front side located in the groove 23131B corresponding to the off-display lens 231212 facing each other, and the LED for abnormal display of the load state. A light emitting surface 23122A at the front end is located in the groove 23131B corresponding to the lens 23231B for displaying the abnormal condition of the load state facing the LED 23231A. An optical emission surface 23122A at the front end is located in the groove 23131B corresponding to the lens 23231B for opposing in-unit operation error display. That is, the light emitting surface 23122A on the front side of the light source 23122 is located in the light impermeable cylindrical portion 23131, and the diffusion of the light emitted from the light emitting surface 23122A is the cylindrical portion. The structure prevented by 23131 is made.

A gap g of a predetermined length is secured between the light emitting surface 23122A of the light source 23122 and the light receiving surface 23121S1 of the lens 23121 for display. The light emitting surface 23122A and the light receiving surface 23121S1 of the display lens 23121 are prevented from contacting each other.

The display lens 23121, that is, the on-display lens 231211, the off-display lens 231212, the load display lens 231213, the operation error display lens All of the 231214 protrude outwardly from the front panel 2313 and the columnar light transmitting unit 23121S2 for transmitting light incident from the light source 23122 to the light receiving surface 23121S1. It has the light emission part 23121S3 which emits the light transmitted by 23121S2.

As shown in Fig. 9, the light emitting portion 23121S3 has a substantially flat first side surface 23121S31 having a tip portion almost arched, and substantially parallel to the first side surface 23121S31 so that the tip portion is almost arched. A substantially flat second side surface 23121S32 forming a shape and a front surface 23121S33 extending substantially in an arc shape over the periphery of the first side 23121S31 and the periphery of the second side 23121S32. Unevenness 23121S34 is inserted into all of the first side surface 23121S31, the second side surface 23121S32, and the front surface 23121S33.

As shown in Fig. 9, the light emitting portion 23121S3 has a substantially flat first side surface 23121S31 in which the tip portion is almost arched, and substantially parallel to the first side surface 23121S31, and the tip portion is almost arched. A substantially flat second side surface 23121S32 forming a shape, and a front surface 23121S33 extending substantially in an arc shape over the periphery of the first side surface 23121S31 and the periphery of the second side surface 23121S32; When the unevenness 23121S34 is inserted into all of the first side surface 23121S31, the second side surface 23121S32, and the front surface 23121S33, the direction of arrows a, b, c, d, and e, that is, from above, from below Even if viewed from either the left or the right, or viewed from the front, the light emitted from the light emitting portion 23121S3 is strong, and as a result of the start test, for example, the light emitting portion 23121S3 has a hemispherical shape. In comparison with the case where the unevenness is put in the whole surface, Visibility was considerably improved. Therefore, in the large control center (refer FIG. 2) which consists of many hotbeds which perform load state monitoring and control of many motor loads, the control unit 23, 23 which comprises the hotplates 24, 24 ... The abnormality display device 2312 can visually recognize from a relatively distant position such as the passage AA in the factory even if the watcher does not visually check the near nib.

An example of the arrangement in the control unit 23 of the power supply circuit unit 2315 and the detailed structure of the power supply circuit unit 2315 itself is shown in FIGS. 5, 11 and 12, wherein the I / O circuit is formed. An I / O circuit board 2316, the control circuit board 2317 on which the control circuit is formed, the display circuit board 2318 on which the display circuit is formed, and the power circuit circuit 2315 on which the power supply circuit is formed, control the control. The power supply circuit unit 2315 is provided between the front panel 2313 and the rear panel 2314 capable of opening and closing the unit 23, and the power supply circuit unit 2315 is provided to the substrate 2316 adjacent to the I / O circuit board 2316. It is arranged adjacently.

The bridge circuit 23151 of the power circuit unit 2315 is formed on the power circuit board 23154 in the power cover 23153.

The smoothing capacitor 23152 and the stabilizing capacitor 23159 of the power supply circuit section 2315 are attached to a capacitor mounting cover 23155 that is detachable from the power supply cover 23153.

The capacitor mounting cover 23155 is disposed on the front panel 2313 side of the power cover 23153, and the capacitor mounting cover 23155 is used to secure the strength of the power cover 23153. It is arrange | positioned at each part of the cover 23153 (refer FIG. 11).

The smoothing capacitor 23152 and the stabilizing capacitor 23159 are mounted on the capacitor mounting substrate 231552 attached to the capacitor mounting cover 23155. The smoothing capacitor 23152 and the stabilizing capacitor 23159 are disposed on the rear panel 2314 side from the capacitor mounting substrate 231552.

The capacitor attaching cover 23155 is detachably attached to the power supply cover 23153 by a slide detachable structure.

Separating the capacitor mounting cover 23155 from the power supply cover 23153 in the state where the front panel 2313 is open as described above, opens the capacitor mounting cover 23155 in the direction of an arrow as, namely the It slides in the direction away from the I / O circuit board 2316.

Mounting of the capacitor mounting cover 23155 to the power supply cover 23153 is performed in a direction opposite to the arrow as, i.e., with the front panel 2313 open as described above. It slides in the direction approaching the I / O circuit board 2316.

A concave portion 231531 is formed at one side of the capacitor mounting cover 23155 and the power supply cover 23153, and a convex portion 231551 is formed at the other side and engaged with the concave portion 231531. When the condenser mounting cover 23155 is slid on the power cover 23153 in the direction of the arrow as in the slide method, the convex portion 231551 extends to the shoulder 231532 outside the concave portion. By raising, the capacitor mounting cover 23155 opens in the direction of the arrow al, ie toward the front panel 2313. Further, when the capacitor mounting cover 23155 is opened in the direction of the arrow al, the smoothing capacitor 23152 and the stabilizing capacitor 23159 on the capacitor mounting cover 23155 come into contact with the power cover 23153. It can prevent.

In the illustrated example, the recess 231531 is provided on the power cover 23153 side, and the convex portion 231551 is provided on the capacitor mounting cover 23155 side, respectively. May be provided on the other side.

The capacitor mounting board 231552 and the power supply circuit board 23154 are connected by a wire harness 23156. The smoothness on the capacitor mounting board 231552 is connected to the wire harness 23156. The capacitor 23152, the stabilizing capacitor 23159, and the bridge circuit 23151 on the power supply circuit board 23154 are connected as shown in FIG. 10.

Embodiment 2.

As shown in FIG. 13, the connection between the capacitor mounting board 231552 and the power supply circuit board 23154 includes a female connector 231561 mounted on the capacitor mounting board 231552, and the power supply circuit board. The connector mounting board 231552 is connected to the male connector 231562 by being attached to the 2323154 and detachably coupled to the female connector 231561. The connector 231561 is connected by the connector 231561 and 231562. The smoothing capacitor 23152 and the stabilizing capacitor 23159 and the bridge circuit 23151 on the power supply circuit board 23154 are connected as shown in FIG.

Also in this Embodiment 2, the concave part 231531 is formed in one side of the said capacitor | condenser attachment cover 23155 and the said power supply cover 23153, and the convex part 231551 which the other engages in the said recessed part 231531 is formed, respectively. When the capacitor mounting cover is detached by the slide method, the capacitor mounting cover 23155 is slid on the power cover 23153 in the direction of an arrow as, so that the convex portion 231551 is a shoulder outside the recess. The capacitor mounting cover 23155 is opened in the direction of the arrow al, ie, toward the front panel 2313 by being seated at 231532. Further, when the capacitor mounting cover 23155 is opened in the direction of the arrow al, the smoothing capacitor 23152 and the stabilizing capacitor 23159 on the capacitor mounting cover 23155 come into contact with the power cover 23153. You can prevent it.

In addition, the capacitor mounting substrate 231552, together with the capacitor mounting cover 23155, is opposite to the directions of the arrows as and al, and the arrows as and al when the capacitor mounting cover 23155 is detached and mounted. It is concerned that an excessive force acts on the connectors 231561 and 231562 because it moves in the phosphorus direction. However, such a fear is eliminated because it is connected to the wire harness 23156.

In addition, as apparent from the above description and the respective drawings, the first embodiment has the following technical features.

Characteristic point 1: The control center provided in the front panel of the control unit which comprises each of several nirvana, the load state monitoring screen display apparatus which displays a load state, and the abnormality display apparatus located in the vicinity of this load state monitoring screen display apparatus. To

The abnormal display device includes a light source disposed inside the front panel, a light receiving surface through which the light source penetrates the front panel, and a columnar light transmitting unit transmitting light incident on the light receiving surface; It is composed of a lens having a light emitting portion protruding to the outside from the front panel to emit light transmitted by the light transmitting portion,

The light emitting portion has a substantially flat first side with a tip end almost arched and a substantially flat second side with a leading end almost arched, and a periphery of the first side and the second side Has a front surface that is serialized in an almost arch shape across the perimeter of the,

Concave-convex is inserted in all of the said 1st side surface, the said 2nd side surface, and the said front surface.

Feature point 2: The control center according to feature point 1, wherein at least two pairs of the lens and the light source are provided, one pair indicating an abnormality in a load state, and the other pair indicates an operation error in the control unit. Control center, characterized in that.

Characteristic point 3: The control center as described in the characteristic point 2 WHEREIN: The said pair of lens is provided in parallel, and the said light source of each pair is provided in parallel.

Feature point 4: The control center according to any one of feature points 1 to 3, wherein the lens is mounted in a lens mounting through hole provided in the front panel, and is provided in the control unit to control the display of the load state monitoring screen and the light source. The control center, characterized in that the light source is attached to a display control substrate for controlling the light emission.

Feature point 5: The control center according to any one of feature points 1 to 4, wherein at least a portion of the front panel surrounding the light transmitting portion is formed of a light impermeable resin, the lens is formed of a light transmissive plastic, and the light source The control center, characterized in that the LED.

Characteristic point 6: The control center as described in the characteristic point 4 or the characteristic point 5 WHEREIN: The said lens mounting through-hole is formed in the cylindrical part integrally provided in the said front panel, The said lens of the said lens is formed in the front side from the inner end surface of the said cylindrical part. The light receiving surface is located, The light emission surface of the front side of the said light source is located in the said cylindrical part, The control center characterized by the above-mentioned.

Feature point 7: The control center according to feature point 6, wherein a gap having a predetermined length is formed between the light receiving surface of the lens and the light emitting surface of the light source.

Feature point 8: The control center according to any one of feature points 4 to 7, wherein the front panel is pivotable with respect to the display control board.

Characteristic point 9: All the control units of each nirvana have the characteristic structure of at least 1 of the said characteristic points 1-8.

Characteristic point 10: The alternating current stepped down to a predetermined voltage is converted into a direct current from a bridge circuit, and the direct current output of the bridge circuit is converted into a smooth direct current by a smoothing capacitor. A control center incorporating a power supply circuit portion to be supplied as a control unit,

The I / O circuit, the control circuit, the display circuit and the power supply circuit portion are provided between the openable front panel and the back panel of the control unit,

And the smoothing capacitor of the power supply circuit portion is attached to a capacitor mounting cover detachable to the power supply cover.

Feature point 11: The control center according to feature point 10, wherein the capacitor mounting cover is disposed on the front panel side of the power cover.

Characteristic point 12: The control center as described in the characteristic point 10 or the characteristic point 11 WHEREIN: The said capacitor mounting cover is arrange | positioned in each part of the said power cover, The control center characterized by the above-mentioned.

Feature point 13: The control center according to any one of feature points 10 to 12, wherein the smoothing capacitor is mounted on a capacitor mounting substrate attached to the capacitor mounting cover.

Characteristic point 14: The control center of characteristic point 13 WHEREIN: The said smoothing capacitor is arrange | positioned at the said back panel side from the said capacitor mounting board, The control center characterized by the above-mentioned.

Feature point 15: The control center according to any one of feature points 10 to 14, wherein the capacitor mounting cover can be attached to and detached from the power supply cover by a slide-type attachment / detachment structure,

A convex portion is formed on one side of the condenser mounting cover and the power supply cover, and a convex portion engaged with the concave portion on the other side is formed, and when the condenser mounting cover is separated by the slide method, the convex portion is provided on the shoulder outside the concave portion. And the condenser mounting cover is opened by raising.

Feature point 16: The control center according to any one of feature points 13 to 15, wherein the capacitor mounting board and the power supply circuit board are connected by a wire harness or a connector.

1 motor
2 control center
21 Load State Detection Sensor
22 contactor
23 control unit
24 nirvana
25 step-down transformer
231 electronics unit
2311 Load Condition Monitoring Screen
2312 or higher display

Claims

Converting alternating current stepped down to a predetermined voltage from a bridge circuit to a direct current, and supplying a direct current of the bridge circuit with a smooth direct current from a smoothing capacitor to the I / O circuit, the control circuit and the display circuit formed on the substrate as their power source. Control center with a power supply circuit inside the control unit,
The I / O circuit, the control circuit, the display circuit, and the power supply circuit portion formed on the substrate are provided between an openable front panel and a rear panel of the control unit,
The bridge circuit of the power circuit portion is formed on a power circuit board in a power cover;
And the smoothing capacitor of the power supply circuit portion is attached to a capacitor mounting cover detachable to the power supply cover.

The method according to claim 1,
And the condenser mounting cover is disposed on the front panel side of the power cover.

The method according to claim 1 or 2,
The condenser mounting cover is disposed at each part of the power cover.

The method according to any one of claims 1 to 3,
And the smoothing capacitor is mounted on the capacitor mounting substrate mounted on the capacitor mounting cover.

The method according to claim 4,
And the smoothing capacitor is arranged on the rear panel side from the capacitor mounting substrate.

The method according to any one of claims 1 to 5,
The capacitor mounting cover can be attached to or detached from the power supply cover by a detachable structure of a slide type,
A convex portion is formed on one side of the condenser mounting cover and the power supply cover, and a convex portion engaged with the concave portion on the other side is formed, respectively, and when the condenser mounting cover is separated by the slide method, The control center, characterized in that the capacitor mounting cover is opened by sitting on the back.

The method according to any one of claims 4 to 6,
The capacitor mounting board and the power supply circuit board are connected by a connector.

The method according to any one of claims 4 to 6,
And the power supply circuit board is connected to the capacitor mounting board by a wire harness.