JPH03238502A - Signal switching device - Google Patents

Abstract

PURPOSE:To eliminate residual contacts to improve the reliability by outputting an output signal, which definitely appears for a prescribed time regardless of a long-time no-voltage state during the signal switching operation of a signal switch with contacts, by the signal switch with contacts. CONSTITUTION:An output signal processing part 23 is constituted which immediately changes a B contact 221 (signal repeater) from the turning-off state as the signal cut-off state to the turning-on state as the signal pass state at the time of the change of an output signal 17a of a signal switch 17 with contacts to a voltage state from the no-voltage state and changes the contact 221 from the turning-on state to the turning-off state after a delay time gamma2 longer than a prescribed open circuit time gamma1 of the switch 17 at the time of the change from the voltage state to the no-voltage state. Thus, it is unnecessary residual contacts in the signal switch 17 with contacts, and a signal switching device of high reliability is obtained.

Description

[Detailed Description of the Invention] [Field of Application in Children's Business] The present invention, for example, switches and outputs an automatic signal and a manual signal, starts and stops a plant with the automatic signal, and starts and stops the plant with the manual signal. This invention relates to a signal switching device 1% that only stops operation, and has high operational reliability.

[Conventional technology]

FIG. 2 is an explanatory diagram of the configuration of a plant operation control device 2 using a conventional signal switching device l.
This controls the operation and stopping of the system.

In FIG. 2, 4 has a negative pole 41 connected to the DC control power supply 5.
and the other 4fil=42 are connected to one fixed contact 61 of the two-man cloth contact signal switch 6,
When commanding plant 3vC startup, automatic side-turning means 7VC
Therefore, the signal 4 is turned on and g and output from the other pole 42.
When a is brought into a energized state and the plant 3 is commanded to stop, it is turned off by the automatic turbidity control 7 and the output signal 4a is turned off.
Point Ag, 8, is a direct current antibacterial power source 9, which outputs an automatic signal 4a as a binary signal exhibiting both the voltage state and the non-voltage state.
The positive and negative poles P and N2 of
An A contact outputting a signal mode switching signal 8a as a binary signal similar to the above.

10, one pole 101 is the positive pole P of the DC suppression source 11.

1'C connection, and the other pole 102 is connected to the other fixed contact 62 of the signal switch 6 via the A contact 121. Depending on whether or not the movable contact 63 is excited by the signal 87c, the movable contact 63 switches to contact one of the control contacts 61 and 62.

Furthermore, the contact 63 is a residual contact that does not come into contact with any of the contacts 61 and 62 during this contact switching operation and cause a red state.

120 is a 1-L coil connected between the contact 63 and the negative pole N1 of the DC side power supply 5 so as to be driven by the signal 5aVc which is the output signal of the signal switching device 6 output from the residual contact 63; The A contact 121 described above and the illustrated Al
The i point 122 is a contact point 13 which is driven in conjunction with the coil 120 and forms the loop 12 together with the coil 120.
When the contact 122 turns on/off, it will start and turn red into operating state.
The plant body is designed to stop operation when the contact 122 is turned off VCtjQ, and the aforementioned 7 runt 3 is connected to the relay coil 120, the □ point 122, and the plant body 1.
It is composed of 3. The signal switching device 1 described above is composed of the signal switching device 6 and the contacts 121.
Further, the plant operation control device 2 is composed of the various parts shown in the figure except for the plant 3.

In FIG. 2, each part is connected to the VC circuit as described above, and furthermore, when the relay coil 120 is energized, the contact 12
1.122 is instantaneously turned on, and when coil 120 is de-energized, contacts 121 and 122 are instantaneously turned off. Therefore, in switch 6, contacts 6 and 6
In a state where the signal mode switching signal 8a is input to the coil 6o so as to establish conduction with the coil 6o, when the contact 4 is turned on, the contacts 121 and 122 are immediately turned on, and the plant main body 13 is started and put into operation. or when the bulge point 4 turns off, the □ points 121 and 122 immediately turn off VC and the main body part 1
3 will be suspended from driving. Then, as described above, when the plant main body 13 is in the operating state IO and the B contact 10 is on VC, the contacts 62 and 63 of the switching device 6
When the switching signal 8a is inputted to the coil 60 so as to establish conduction, the contact 121 is turned on at this time, and since the contact 63 is a residual contact, the contact with the contact 63 is changed from the contact 61 to the contact 62. During switching to VCfx, the coil 120 is de-energized and the plant main body 13 stops.
a, the main body 13 continues to operate, and in this state, when the operating contact 10 is turned off, the coil 120 is de-energized and the main body 13 stops, and at the same time, the self-holding by the relay 120 contact 1217c is released. . Therefore, even if the contact point (it) returns to the on state in this state, it is unlikely that the main body portion 13 will be in the operating state.

In FIG. 2, when the coil 120 is in the de-energized state, the signal switching device 1 switches between the automatic signal 4a and the manual signal 10a as a binary signal similar to the signal 4a output from the other pole 102 of the contact 10. The automatic signal 4a is used to start and stop the plant main body 13, with one manual command and one word lO.
It can be said that this is a device in which the stopping force of the main body portion 13 is applied at step a.

[Problem to be solved by the invention]

The signal switching device 1 is constructed as described above, but since the remaining contact 63 in one device switches between both contacts 61 and 62 while sliding between the two contacts 61 and 62, in the case of the signal switching device 1 , the contacts 61, 62 and 63 tend to wear out, resulting in poor contact between the contacts 61, 62 and 63, and as a result, the signal switch [1] has the problem of low reliability. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a signal switching device with high reliability by eliminating the need to use residual contacts such as those described above.

[Suggestions for solving open questions]

To achieve the above object, according to the present invention, the signal mode switching signal and the first signal and the 34th word, both of which are binary signals exhibiting both a voltage state and a non-voltage state, are input. 71 and a contact signal switch that switches and outputs the kun@l signal and the third signal according to the verbal response of the signal mode switching signal, and the contact signal switch signal and the binary signal. A built-in signal repeater is provided to which a power cylinder 2 signal is input, and which relays the second signal and outputs it as the third signal, and the output signal of the contact signal switch changes from the no-voltage state to the third signal. Immediately when the state changes to the voltage state, the signal repeater is switched from the signal passing state to the signal 4.
When the output signal of the contact signal switch changes from the voltage state to the no-voltage state Kf, the signal repeater changes from the signal passing state to the signal passing state after a delay time longer than a predetermined time. and an output signal processing unit that sets the output signal of the contact signal switch as a final output signal, the contact signal switch being configured to control the signal switching operation of the contact signal switch. The signal switching device is configured to output the output signal that always appears only during the predetermined time period, even if the voltage-free axis is long.

[Effect]

With the above configuration, it is clear that there is no need to employ residual contacts in the contact signal switching device, so a highly reliable signal switching device can be achieved.

〔Example〕

FIG. 1 is an explanatory diagram of the configuration of a plant operation control device 15 using a signal switching device 14 as an embodiment of the present invention. It is something. Then, in Figure 1,
The concave portions in FIG. 2 are given the same reference numerals as in FIG. 2.

Now, in Figure 1, 17 is the aforementioned relay coil 60.
VC compatible relay coil 170 and the above-mentioned fixed contact 61
．． 627') Fixed contacts 171.17 corresponding to each
2 and a movable contact 173 corresponding to the above-mentioned movable contact 63.As shown in FIG. The signal mode librarian signal 8a and the automatic signal 4a are directly input to the contact 171, respectively, and the manual signal 10a is input to the contact 172 via the B contact 221 corresponding to the contact 121K in the figure WJ2. It stands as if it were to be done. Then, in this case, contact 17
3 is connected to the negative electrode of the DC control power source 5 via a relay coil 180 that constitutes the relay 18 together with the A dark spot 181.

Further, the signal switch 17 switches the coil 1 when the contact 8 is turned on.
70 is energized, the movable contact 173 switches to the contact 172@yc, and when the contact 8 turns off Vc, the coil 170 becomes de-energized and the contact 173 switches to the contact 171@yc, and the contact 173 switches to the contact 171@yc. 173 is contact 171
．． Unlike the residual contact 63 described above, when switching between contacts 171 and 172, the contact appears in a state in which it is not in contact with either of the contacts 171 and 172 for a long period of time. After that.

The time τ1 is sometimes called the open circuit time.

The plant main body corresponding to the above-mentioned plant main body 13vc is activated when the contact 181 of the 19tX relay 18 is turned on, and is in a stopped state when the contact 181 is turned off.
20 is driven by the plant main body part 19, and when the first main body part 19 is in a non-call state for a long time, it is in the on state, and when the first main body part N19 is started, it is instantly turned off, and the first main body part 19 is in the operation state. A DC control power supply connected to a series circuit consisting of a limit switch 217j relay coil 220 and a limit switch 20, which turns on after a predetermined time τ longer than the above-mentioned open circuit time τ when stopped, The B contact 221 mentioned above is a contact of the relay 22 driven by the coil 220.

P, , N are the positive and negative electrodes of the power supply 21, respectively, and
The above-mentioned plant 16 has a relay 18 and a plant z body 11.
It consists of 9.

In FIG. 1, each part is constructed as described above, so if the signal 223 outputs from the contact 221 of 1-22 to the contact 172, the switch 17 Also in voltage state and l1Ilii in #voltage state! The automatic force signal 4a and the signal 22a are inputted as binary signals representing the pressure state, and the contact signal switch outputs the signals 4a and 223 according to the contents of the signal 8a. :E+Ratsu*, and in this case, if contact 8 is off and contact 173 of switch 17 is turned to contact 171 side g%, contact 4n
It is convenient that the plant main body Nt9 is started and stopped depending on whether it is turned on or off.

Therefore, when contact 173 is switched to contact 171@ and contact 4 is on and the plant main body 19 is operating, contact 8 is turned on and 1) the relay coil 170 is excited, and contact 173 is turned on. 171 to 172, but at this time, as described above, a state occurs in which the contact 173 wants to be in contact with both of the contacts 171 and 172 for one hour τ1. Therefore, during this τ1, the coil 1
Since 80 is de-energized, the plant main body 19 stops operating.

Immediately before time τ1, the main body 19 is in the operating state, so the limit switch 20 is turned off, and the Bi1 point 221 is turned on. , H, 11
Mi7 Tosuino Sen 20t! As mentioned above, the main body 19 is
The B contact 221 is turned off after a time τ2 has elapsed after the main body 19 has stopped due to the force that does not turn it on until a time τ has elapsed since the main body 19 has stopped. On the other hand, when the time τ, which is shorter than τ2, passes, the contact 173 contacts the contact 172, and at this time, as mentioned above, the VCB critical point 221 continues to be on, so in this case, the B111 point lO
When the contact 173 is turned on, the contact 173 comes into contact with 172 VC, and the plant main body 19 starts up again. Then.

In this way, when the main body 19 is operating, the B scotoma 1
When Vc is turned off at 0, the coil 180 becomes non-animal magnetic and the main body 19 stops operating, and when time τ elapses after this operation stops, the switch 20 turns on, so the contact 221 turns off, and the , Bwi! Even if the point 10 is returned to 1 and turned on, the contact 221 is in the off state, and the β character 221, which does not start the main body 19, will not turn on 7C.

Main body part I9 will not become a military surrender sergeant.

In FIG. 1, each part operates as described above, so in this case, the plant 16, limit switch 20, and snow cooler 2
1 and 1-22, from the contact 173 to the relay fill 18
Signal switch 170 output signal 17a output towards 0
The 0B@ point 221 is built in as a signal repeater which receives the manual signal 103 as a binary signal and relays the signal 10a and outputs it as a relay output signal 222, and outputs the output signal 17a of the signal cutter 17. When the state changes from the non-voltage state to the voltage state, the B contact 221 is changed from the OFF state (signal passing state) to the ON state (signal passing state), and when the output signal 17a changes from the voltage state to the no-voltage state, the switch is switched. It can be said that the output signal processing unit 23 is configured to turn the contact 221 from the closed state to the off state after a delay time τ longer than the predetermined open circuit time τ1 in the circuit 17.

Further, in FIG. 1, the signal switching device 14 described above is composed of the output signal processing section 23 and the signal switching device 17, and the plant operation control device 15 described above is composed of the various parts shown in the figure. There is.

In this case, the control device 15 that controls the operation and stop of the plant 16 includes the plant 16 as a component, which is a voltage source of the output signal 17a.

The plant 16 is used as an output signal detection mechanism to detect no voltage and drive the limit switch 20 as described above, and in FIG. 1, the switch 20 may be driven by the plant 16. So, plant 16
The switch 20 may be driven by a different output signal detection mechanism than the above.

In FIG. 1, since the signal switching device 14 is configured as described above, this device [14] starts the plant 16 with the automatic signal 4a, just like the conventional signal switching device l described above. It is clear that this is a switching device that only stops the plant 16 using the first manual signal 10a, and in this case, there is no residue on the movable contact 173 of the signal switching device 17 as in the switching device 6 described above. It is clear that since no contact mechanism is required, contact wear in the switch 17 is less than in the switch 6, and therefore poor contact between the contacts is less likely to occur. Therefore, it can be said that the signal switching device 4 is a device with higher reliability than the conventional signal switching device 1.

〔Effect of the invention〕

As described above, in the present invention, the signal mode switching signal and the first signal and the third signal, both of which are binary signals exhibiting both voltage states and non-voltage states, are input, and the signal mode switching signal is input. a contact signal switcher that switches and outputs a first signal and a third signal according to the content of the signal;
The contact signal switching device includes a built-in signal repeater that receives the output signal of the contact signal switching device and the second signal as the binary signal, and relays the second signal and outputs it as a third signal. Immediately when the output signal of the switch changes from the no voltage state to the voltage state 1i4, the signal repeater changes from the signal passing state to the signal passing state yf14VCL, and when the output signal of the contact signal switch changes from the voltage state to the no voltage state 0. and an output signal processing unit that changes the signal repeater from a signal passing state to a signal passing state after a delay time longer than a predetermined time, and the signal switching device makes the output signal of the contact signal switching device a long final output signal. The signal switching device is configured such that the contact signal switching device outputs the output signal that always appears during the predetermined time even if the no-voltage state is long during the signal switching operation of the contact signal switching device. did.

Therefore, when configured as described above, it is clear that there is no need to employ residual contacts in the contact signal switching device, so the present invention has the effect of providing a highly reliable signal switching device.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention. FIG. 2 is an explanatory diagram of the configuration of a conventional signal switching device. 1, 14...Signal switching device, 4a...
...Automatic signal (first signal), 6.17...Two-person contact signal switch, 6a. 17a...Signal switch output signal, Ba...
...Signal mode switching signal, lOa...Manual signal (second signal), 22a...Output signal (third signal), 221...B contact (signal relay) vessel), 23
・・・・・・−・Output signal processing section. note 2 prisoner

Claims (1)

[Claims] 1) A signal mode switching signal and a first signal and a third signal, both of which are binary signals exhibiting both a voltage state and a non-voltage state, are input, and the signal mode switching signal is inputted according to the content of the signal mode switching signal. a contact signal switch that switches and outputs the first signal and the third signal; and an output signal of the contact signal switch and the second signal as the binary signal are input and the second signal is output. It has a built-in signal repeater that relays the signal and outputs it as the third signal, and immediately sets the signal repeater to a signal cutoff state when the output signal of the contact signal switch changes from the no-voltage state to the voltage-on state. When the output signal of the contact signal switching device changes from the energized state to the non-voltage state, the signal repeater changes from the signal passing state to the signal passing state after a delay time longer than a predetermined time. and an output signal processing unit that sets the output signal to a cut-off state, the signal switching device having an output signal of the contact signal switching device as a final output signal, wherein the contact signal switching device is configured to switch the signal of the contact signal switching device. A signal switching device characterized in that during operation, the output signal that always appears during the predetermined time period is output even if the no-voltage state is long.