JPS60189763A - Automatic switch opening and closing device - Google Patents

Abstract

PURPOSE:To perform control even on the basis of variation in the illuminance of an installation place, and shorten a wait time, save electric power, and facilitate operation by providing an environmental illuminance detecting means for a copying machine and a means which outputs a signal by the detecting means, and controlling a power source through those means. CONSTITUTION:When the environment becomes light, light is incident on a CdS11 and its resistance decreases. When the product of the resistance value of the CdS and R2 becomes less than the product of R1 and R3, a voltage Vi drops below Vj and a comparator 12 outputs a plus voltage. A voltage Vc is inputted to a Schmitt buffer 13 to give its output hysteresis characteristics, thereby removing the chattering of a control relay 14 due to variation in illuminance. When the output of the buffer 13 goes down to L level, the control relay 14 turns on, and when a manual switch 15 is on, the copying machine 16 is powered on to start. When the environment becomes dark, the relay 14 is turned on to the contrary and the copying machine 17 is powered off to stop. Consequently, the on-off control is performed even according to variation in the illumination of the installation place, so a short wait time, reduction in power consumption, and easy operation are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to automation of power ON/OFF of a copying machine, particularly to preheating of a fixing device.

[Prior art]

Conventionally, when the main switch of a copying machine is in the OFF state, it takes a long time for the fixing device to sufficiently heat up after the main switch is turned on to become ready for copying.

In addition, if the main switch of a copying machine is left on so that it can be used at any time, or if it is forgotten to turn it off, even when it is not in use, such as at night, it can waste electricity and pose a risk of fire. there were.

For this reason, conventionally, when a copying machine is not used for a certain period of time,
Some would automatically switch off or reduce the power supply to the fuser.

However, after a certain period of time has elapsed, a large amount of time is required to restart the system.

〔the purpose〕

SUMMARY OF THE INVENTION In view of the above-mentioned points, it is an object of the present invention to reduce waiting time and reduce power consumption and the risk of fire caused by forgetting to turn off the main switch. That is, the present invention is characterized by having a detection means for detecting the ambient illuminance of the copying machine, an output means for outputting a signal by the detection means, and a control means for controlling the power supply of the copying machine by the output means. It is.

〔Example] Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a diagram showing an outline of the present invention. 1 is a photoelectric conversion element that converts environmental illuminance into an electrical signal; 2 is a photoelectric conversion element 1
3 is a control circuit that controls a relay 4, 4 is a relay circuit, 5 is a manual switch, 6 is a main power source, and 7 is a copying machine.

FIG. 2 is a circuit diagram showing the configuration of this embodiment.

Reference numeral 10 denotes a battery as a power source for the automatic switch opening/closing device, and reference numeral 11 denotes a light-receiving element that converts environmental illuminance into an electrical signal, which uses Ode. R3 is a resistor that forms a bridge in combination with the light receiving element 11, and R2 is a variable resistor that determines the set voltage value Vj. 12 is a comparator for comparing voltage value ■1 and Vj;
R4 is a resistor for limiting the output current of the comparator 12, 0
．． 13 is a Schmitt trigger buffer for providing hysteresis characteristics to the voltage VQ; 14 is a relay that controls the power supply 17;
15 manual switches, 16 copy machines, 17 copy machines 16
It is the power source of ゛.

In the above configuration, the operation will be explained below.

When the surrounding environment becomes bright, light enters 0 (is 11),
The resistance value of 0dS3 becomes smaller. Then, when the value obtained by multiplying this resistance value and the variable resistance R2 becomes smaller than the value obtained by multiplying the resistance value and the resistance R3, that is, the voltage 1 becomes the voltage Vj
When the voltage becomes lower, the comparator 12 outputs a positive voltage. Note that the light at 0 (is 11) is integrated by R4 and capacitor C1.

This integrated voltage Vc is related to the time constant of the integrator, so by setting this time constant to about 10 minutes, the light incident on Ods will repeat instantaneous brightness and dark changes and cause chattering. Color by removing the influence of. That is, it outputs only the incident light for a certain period of time or longer. By inputting this slowly changing voltage Vo to the Schmitt trigger buffer 13 and giving its output a hysteresis characteristic, it is possible to eliminate the chattering of the relay 14 due to changes in illuminance.

When the output of the Schmitt trigger buffer 13 becomes L, the relay 14 turns on, and if the non-manual switch 15 is on, power is supplied to the copying machine 16 and it starts.

This manual switch 15 saves power and reduces the risk of fire by turning it off only when the copying machine is not used for a long time, such as on holidays.

Also, when it gets dark, the relay works in the opposite way to when it is bright, turning off the relay. That is, when light is no longer incident on 04811, 0 (the resistance value of 1B is high, voltage v1 is not much higher than voltage Vj, comparator 12 outputs a negative voltage, and Schmitt trigger buffer 13は■になし、
If the relay 14 is not turned off, the power supply to the copying machine 17 is stopped.

Of course, the switch opening/closing device part does not take the form described above. For example, Figure 3 shows a manual switch and relay connected in parallel, and A is relay 1 in Figure 2.
This is the circuit on the coil side of No. 4. In this configuration, when the manual switch is ON or the surrounding environment is bright (relay 14
is ON), power is supplied to the copying machine 16. Therefore, it is possible to supply power to the copying machine without turning on the manual switch 15 in the fourth state tl.

In addition, Fig. 4 shows a manual switch connected to the battery of an automatic switch opening/closing device, and since the manual switch 15 is generally turned on when it is in the clear state, the relay 14 is turned on accordingly.
is also turned on. Conversely, if the manual switch 15 is turned off, the relay 14 is also turned off. By attaching a manual switch 15 to the battery 1o, the stain pond can be prevented from being drained. Further, it is possible to realize the manual switch 15 of the component company by using a remote switch or the like so that the manual switch 15 is also turned off at the same time as the relay 14 is turned off.

Figures 1 and 15 are a combination of an auto-shutoff timer and a switch opening/closing device.
is a remote switch that becomes 0IPF' when inputting signals from NAIJD gate and 20-digit NAND gate 19. In this circuit, when signals are output from both the switch opening/closing mA and the auto-shutoff timer, the remote switch 3 is turned OFF'. That is, after a certain period of time has elapsed after the user turned the main switch (not shown) to 01 to use the copying machine, a signal is output from the auto-shutoff timer 18, but the copying machine remains in the main power supply 10 until the dark state is reached. is here! Be unified.

Further, even when the copying machine is used in a dark state with the auto-shutoff timer set, the remote switch 20 is turned on for a certain period of time.

In this way, it can be quickly reused after a certain period of time during the day, and it can also be used in the dark.

FIG. 6 is a diagram showing the mounting position of the light receiving element 11 of the automatic switch opening/closing device. When the light receiving element 11 of the automatic switch opening/closing device is installed at the position 11a of the copying machine housing 16, when the operator places a document etc., the light receiving element 11
This may cover up the data and cause the copy operation to stop. Additionally, since there are generally no obstacles placed in front of the copying machine, it works well when installed in position 302, but if the operator continues to stand in front of the copying machine for a long time, The light may be blocked and the copying operation may stop. There is still a paper feed section and a paper ejection section on the side of the copying machine housing 17, and the upper part will not be covered by any obstruction, so if it is installed in the position 11c, it will not work as in the above position. There are no inconveniences and it works well. Of course, the mounting position is not limited to 11c, but may be at other positions. Alternatively, a plurality of light receiving sections may be attached at different positions, the AIJD of each output may be taken, and the power of the copying machine may be turned off only when all the light receiving sections are not irradiated with light. In this way, the inconvenience caused by the light being blocked by obstacles can be solved.

By the way, in FIGS. 6 and 4, manual switch 1
The combination of 5 and relay 140 can also be used as a remote switch, and in that case, the only function is to turn off the switch in the dark, but since there is only one switch, operation becomes easier.

The case where the main switch of the copying machine is opened and closed according to the illuminance has been described above, but it is also effective to use this automatic opening/closing device based on the illuminance only for the fixing device, which is the main component of the copying machine.

Similarly, this method is effective because offices, which are generally used, become dark places by turning off the lights during the hours when the office is not in use at night. If it is bright early in the morning, the input may be too early, or in a room where there is no outside light, you may want to use the light immediately after turning it on, so turning on the light depending on the brightness may not be optimal in practice. In this case, as shown in FIG. 7, it is better to combine brightness control using this method for OF'F and periodic control using a clock timer for ON.

In FIG. 7, 21 is a timer that outputs a signal at a predetermined time, and 22 is a timer that outputs a signal in the morning and turns it off in the afternoon.
FF clock, 23.24 is AND gate, 25 is R-
In the 87 lip-flop, 14-17 and A have the same function as the same numbers and symbols described above. In the morning, multiple signals are output from the clock 22, and when a signal is output from the timer 21 at a predetermined time, multiple signals from the AND gate 23 are applied to the set terminal of the R-8 flip-flop 250, and the relay 1
4 is not working, and the main power supply 17 of the copying machine 16 is turned on. At this time, since the AND gate 24 is deenergized, the R-Fl flip-flop is set depending on the ambient illuminance, and the power supply 17 is not supplied to the copying machine 16. Also, in the afternoon, when the ambient illuminance becomes low, a signal is output from the AND gate 24, and the R-S flip-flop is reset.
Power supply to the copying machine is stopped. In addition, manual switch 1
5 is not a turtle limited to the position shown in the same figure. In this way, when the power is turned on, the timer is used, and when the power is turned off, the environmental illuminance and the switch are controlled.

〔effect〕

As explained above, according to the present invention, the main switch of the device is controlled not only by the auto-shutoff function using a timer, but also by changing the illuminance of the installation location, reducing waiting time, saving power, and improving operation. This contributes to the simplification of

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an outline of the present invention, Fig. 2 is a circuit diagram showing the configuration of a device according to the invention, and Figs. 3 to 5 and Fig. 7 show other embodiments focusing on the switch part. FIG. 6 is a view showing the mounting position of the device according to the present invention. Figure 5 IR Figure 6

Claims (3)

[Claims] (1) An automatic machine characterized by having means for detecting ambient illumination of the copying machine, output means for outputting a signal by the detection means, and control means for controlling the power supply of the copying machine by the output means. Switch switchgear. (2) In item 1, the apparatus further includes a timer means for controlling the power supply at a Pfr fixed timing, and the stain source is controlled by the output means of the controller dashed line or the timer means. Automatic switch opening/closing device. (3) The automatic switch opening/closing device according to item 2, wherein the control means is controlled by the timer means during a predetermined time period and by the output means during other time periods.