JP2841359B2 - Switchgear - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a switchgear applied to a solid state relay or the like. <Prior art and its problems> As a conventional device of this kind, for example, a solid state relay,
As shown in the figure, an input signal circuit 103 connected to a pair of input terminals 101 and 102, a trigger circuit 105 connected to the input signal circuit 103 via a photocoupler 104, and a pair of load terminals 106 and 1
There is a semiconductor control rectifier element, such as a triac 108, and a surge absorbing circuit 110 having a varistor 109 and the like, which are interposed between the switches 07 and triggered by the trigger circuit 105. When an input signal is applied between a pair of input terminals 101 and 102, a triac 108 is turned on by a trigger circuit 105 via a photocoupler 104 to open and close a load (not shown). By the way, in such a solid-state relay, a functional circuit such as an AC / DC conversion circuit or a voltage detection circuit may be added as an input circuit in a stage preceding the input signal circuit 103. If such a functional circuit is built into the relay body, various types of products must be prepared for various user requirements, and additional functional circuits can be removed when they become unnecessary or maintenance is required. Is difficult. Further, when various functional circuits are individually united, complicated wiring is required at the time of mounting. For example, as shown in FIG. 7, in the three solid state relays 115, 116, 117 each having a pair of input terminals 111, 112 and load terminals 113, 114, the one load terminal 113 is connected to the three-phase AC power supply 118, while the other load terminal 114 is connected to the other load terminal 114.
When an AC / DC conversion circuit unit 123 and a voltage detection circuit unit 124 connected to an input operation circuit 122 having an AC power supply 120 and a switch 121 are added to the motor / motor 119 connected to Unit
The input terminals 111 and 112 of the solid-state relays 115 to 117 must be connected in parallel to the output side of the voltage detection circuit unit 124, as well as the wiring between the 123 and the voltage detection circuit unit 124. Not only is it time-consuming, but the wiring space is not large. This has substantially the same problem in the control device of the electric device disclosed in Japanese Patent Application Laid-Open No. 59-150408. <Object of the Invention> The present invention has been made in order to solve the above-mentioned problems, and there is no waste of setting space, and wiring work can be eliminated, and work efficiency can be improved. An object of the present invention is to provide a switchgear capable of arbitrarily selecting and adding a functional circuit as an input circuit. <Structure and Effect of the Invention> A switching device according to the present invention includes a device main body having a built-in opening / closing means and a functional circuit unit having a built-in input circuit of the opening / closing means. A pair of input terminals of the opening / closing means set at intervals;
A pair of connecting terminals which are set on the other side of the apparatus main body so as to face each other on a parallel line passing through each of the input terminals and are electrically connected to the opposite input terminals on the same line, intersect the parallel line. A pair of load terminals of the opening / closing means set in the apparatus main body at predetermined intervals on a line, and the functional circuit unit includes a pair of load terminals set at predetermined intervals on one side. An input terminal and an output terminal directly connected to the input terminal of the apparatus main body are provided, and each of the connection terminals is configured to be directly connectable to each input terminal of the adjacent apparatus main body. According to the present invention, since the functional circuits are configured as a unit, the required functional circuits can be selectively used, and the versatility is expanded. In addition, since the above-mentioned functional circuit unit can be detachably connected to another functional circuit unit or the apparatus main body, the complexity of wiring work is greatly reduced, and the wiring work space does not need to be increased. <Description of Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example in which the switchgear according to the present invention is applied to a solid state relay. In the figure, reference numeral 1 denotes a device main body, for example, a relay main body,
Reference numerals 2 and 3 denote a pair of screw-fastened input terminals provided on the left side of the relay body 1. Reference numerals 4 and 5 denote a pair of screw-type load terminals, which are provided on the upper and lower sides of the relay body 1, respectively. The relay main body 1 incorporates, for example, the relay circuit described with reference to FIG. A pair of connection terminals 8, 9 electrically connected to the pair of input terminals 2, 3 via lead wires 6, 7 respectively are protrudingly provided on the right side surface of the relay body 1. These connection terminals 8 and 9 have U-shaped notches 8a and 9 at their ends so that they can be detachably screwed and connected to a pair of input terminals 2 and 3 of another solid state relay.
a is formed. Reference numeral 10 denotes a functional circuit unit, for example, a voltage detecting circuit unit, and a pair of screw-tightened input terminals 11, 12 on the left side.
And a pair of output terminals 13 and 14 are provided on the right side surface. These output terminals 13 and 14 have U-shaped cutouts 13a and 14a formed at their respective ends.
It is configured as a connection terminal that can be tightened and connected to the pair of input terminals 2 and 3 or the input terminals 11 and 12 of another functional circuit unit. The voltage detection circuit unit 10 includes, for example, a second
A voltage detection circuit 15 as shown in FIG. That is, this switchgear includes a device main body 1 having a built-in opening / closing means and a functional circuit unit 10 having a built-in input circuit of the opening / closing means, and the device main body 1 has a predetermined interval on one side. And a pair of input terminals 2 and 3 of the opening / closing means, which are set in advance, are electrically connected to input terminals which are set on the other side of the apparatus main body so as to face each other on a parallel line passing through each of the input terminals and to face the same line. Pair of connecting terminals 8, 9
And a pair of load terminals of the opening / closing means set in the apparatus main body 1 at a predetermined interval on a line intersecting the parallel line.
The functional circuit unit 10 is directly connected to a pair of input terminals 11 and 12 set at a predetermined interval on one side and to the input terminals 2 and 3 of the device body 1 Output terminal 1
3 and 14, and the connection terminals 8 and 9 are configured to be directly connectable to the input terminals 2 and 3 of the adjacent apparatus body 1. In Figure 2, 16 has a constant voltage circuit connected to the input terminals 11 and 12 of the pair, the transistors TR _1, a resistor R ₁ and the Zener diode ZD _1. Reference numeral 17 denotes a shunt circuit connected after the constant voltage circuit 16 and includes a transistor.
TR ₂ , TR ₃ , a Zener diode ZD ₂ and resistors R _{2 to} R ₇ .A series body of the Zener diode ZD ₂ and the resistor R ₂ is connected between the output lines L ₁ and L _{2 of the} constant voltage circuit 16. Has been inserted. 18 transistors TR _4, TR _5, amplifier circuit having a resistor R ₉ ~R _11, 19 transistor TR _6, a constant current circuit having a Zener diode ZD ₃ and the resistor R _12. The thing is, the potential V ₁ of the connection point X ₁ in Shiyumitsuto circuit 17 in the course of the input signal current applied between the input terminals 11 and 12 is increased gradually to the rated value of the transistor TR ₃ emitter potential V
_When it is less than ₂ , transistors TR ₂ and TR ₃ are non-conductive and the output from node X ₂ is zero. However, the above V ₁
There transistor TR _2, TR ₃ are conducted moment was greater summer than V _2, the steep potential V ₃ generated at the connection point X _2. The output potential V ₃ from the Shiyumitsuto circuit 17 is amplified, the constant current circuit
19 conducts, and a rectangular wave output is sent to the output terminals 13 and 14. Next, an example of use of the above-mentioned solid state relay will be described in the case of controlling the opening and closing of a three-phase AC motor. First, the third three relay body as shown in FIG. 1 _1, 1 _2, 1 ₃ was prepared, the first relay main body 1 ₁ of the pair connecting terminals 8 and 9 of the second solid state relay main body 1 connected by screwing plugged into the input terminals 2 and 3 of the _second pair, similarly connects the second relay main body 1 ₂ and the third relay body 1 _3. Then, connect each phase of the relay body 1 ₁ to 1 one 3-phase power supply 31 to the respective load terminal 4 of _3, to connect the motor 32 to the other of each load terminal 5. On the other hand, a pair of output terminals 13, 1 of the voltage detection circuit unit 10
4 connecting with screwing plugged into the input terminals 2 and 3 of the first pair of relay body 1 ₁ above. Further, an input operation circuit 35 having a DC power supply 33 and an operation switch 34 is connected to a pair of input terminals 11 and 12 of the voltage detection circuit unit 10. When the operation switch 34 of the input operation circuit 35 is turned on, the above-described voltage detection circuit 15 in the voltage detection circuit unit 10 operates, and a rectangular output signal from the voltage detection circuit 15 is transmitted to the first to third relays. Input terminals 2 and ₃ of main unit 11 to ₁₃
Since simultaneously applied between, so that the motor 32 is controlled to open and close via the relay circuit of the relay body 1 ₁ to 1 _3. Here, since the voltage detection circuit 15 is not built in the relay main body 1 and is configured as an independent unit 10, a user or the like can use the voltage detection circuit unit according to necessity / unnecessity of the voltage detection circuit 15. It becomes possible to select 10. Further, since it detachably connected the output terminals 13 and 14 of this Yunitsuto 10 to the relay body 1 (1 ₁ to 1 _3),
Wiring saving is achieved, so that the working time during mounting can be shortened, and the mounting space can be reduced. By the way, in the above example, the voltage detection circuit unit 10 is taken as an example of the functional circuit unit, but the present invention is not limited to this. For example, as another example, as shown in FIG. 4, resistors R ₁₃ and R ₁₄ and a rectifier diode D ₁ ,
An AC / DC conversion circuit 41 including a half-wave rectifier circuit 40 having D ₂ , a zener diode ZD ₄ for constant voltage, and a smoothing capacitor C may be configured as a functional circuit unit.
In this case, as shown in FIG. 5, an AC / DC conversion circuit unit 50 connected to an AC power supply 51 and an input operation circuit 52 having an operation switch 34 is connected to the above-described voltage detection circuit unit 110. by coupling the circuit Yunitsuto 10 and relay body 1 _1, it can be provided an AC input voltage detection function with solid state relay easily. The connection structure between the output terminals 13 and 14 of the functional circuit units 10 and 50 and the relay body 1 and the like is not limited to the above structure, but may be other means such as a socket structure.
Further, in the above example, the solid-state relay has been described as an example of the switching device, but the switching device can also be applied to a contact relay or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example in which a switchgear according to the present invention is applied to a solid state relay, and FIG. 2 is a circuit diagram showing an example of a voltage detection circuit in a functional circuit unit in the solid state relay. FIG. 3 is an explanatory view of an example of use of the solid state relay of the present invention;
FIG. 4 is a diagram showing another example of a functional circuit unit in the solid-state relay of the present invention, FIG. 5 is an explanatory diagram of an example of a combination of different functional circuit units and a relay body, and FIG. FIG. 7 is a diagram showing an example of a relay circuit to be used, and FIG. 7 is an explanatory diagram of an example of use of a conventional solid state relay. 1 ... Main unit, 2, 3 ... Main unit input terminal, 4, 5 ... Load terminal, 10 (50) ... Functional circuit unit, 11, 12 ... Functional circuit unit input terminal, 13, 14 ... Output terminal.

Claims (1)

(57) [Claims] An opening / closing means main body, and a functional circuit unit having an input / output circuit of the opening / closing means built therein, wherein the apparatus main body comprises a pair of the opening / closing means set at a predetermined interval on one side. A pair of connecting terminals which are set on the other side of the apparatus main body so as to face each other on a parallel line passing through these input terminals and are electrically connected to the input terminals facing each other on the same line; A pair of load terminals of the opening / closing means set in the apparatus main body at predetermined intervals on a line intersecting the parallel line, and the functional circuit unit is set at predetermined intervals on one side A pair of input terminals, and an output terminal directly connected to the input terminal of the device body,
A switchgear, wherein each of the connection terminals is configured to be directly connectable to each input terminal of an adjacent device body.