JPS60161836A - Paper cassette discriminator for copying machine - Google Patents

Abstract

PURPOSE:To simplify the wiring of a paper cassette discriminator as well as to discriminate paper cassettes in type in an accurate manner, by interposing an analogue value in the point midway in the wiring by means of a digital-toanalog converter circuit of a ladder resistance circuit or the like. CONSTITUTION:Each paper cassette B is designed to be chargeable to a copying machine body A at every paper size, while an actuator C being different in a state of configuration is provided for each paper cassette B at every paper cassette B. When the paper cassette B housing paper size sheets in use is charged into the copying machine body A, a switching device D installed at the side of the body A is set in motion by the corresponding actuator C, and an operating state of this switching device D is converted into an analogue value by a digital-toanalog converting device whereby the wiring is simplified. Next, again this converted analogue value is put back to a digital value by an analog- to-digital converting device F, and discrimination between types of the paper cassette takes place with certainty.

Description

[Detailed Description of the Invention] f′1. It also relates to a device for identifying the thickness of paper in a paper storage cassette. Chobesa manuscript (Figure bosa r sea 4'') 1
Everyone works together on the manuscript table: (The table moves back and forth to the stone on the left of Loe 5.
1': 2 irradiation lamps are installed on the 2nd furnace of the Ijita stand, and the point 1' of the 2nd irradiation lamp on the original tatami table 1 is 1'. -■ creates a gap of 8 degrees, and the reflected light is focused and reflected by a condensing lens 3 with a built-in reflector, and is imaged into a drum-like image element I, $5. Natsumata is in Yo5.

8. Also, around the drum-like image storage 5, there is a developing device 8.
Fule voice unspha lamp 9, transcription corotron 10-excluding? Corotron 11, Preclean Phalon I2
After the photoreceptor 5 is uniformly charged by the release of the GoMerge flotron 6, an electric latent image is formed by the exposure system. A developer was applied to the latent image using the developing blank 7f/C, and a visible image was formed at 31t. However, static electricity can be removed and transfer can be performed easily.

Sara iC! 14.15 is a paper cassette that stores copy paper of different sizes, and the paper cassette 14.
．． 15 is freely inserted into the copying machine at 8 years old. When the copying process Mj is started, the paper delivery rolls 16.17 are driven by a 2t drive motor (not shown), and the paper in the cassette 14.15 is turned on. Noiz 2'L 7811 paper〃S gate 18Vc feeding n, the 11th view top image on the photosensitive book 5 and the paper are exactly at the timing when the gate I8 sword S open is 1 and the 1st river is at the same time. , said roll 16.17
When the paper is driven, the paper synchronizes with the rotation of the drum-shaped photoreceptor 5 and begins to be fed out again. -r - The image is immediately transferred to the paper, then the fluorotron 11.
The static electricity is removed from the sheet K, and the sheet is conveyed to the fixing device 20 by the sheet conveying belt I9. In the fixing device 20 consisting of a heating roll 21 and a pressure roll 22, the paper is
．． The paper is heated and pressurized for 2' while the paper is conveyed for 22 hours, and the image is fixed on the door image at a constant rate of 2tT. There is a Vc Natsumata.

However, the residual developer remaining on the drum-shaped photosensitive element 10 without being transferred to one sheet of the 11-view door image on the drum-shaped photoreceptor 5 is removed by static electricity removal 8 by the discharge VC of the pre-clean corotron 12. After the process, the photoreceptor 5 is removed by plate-1:3.
Removed from above.

However, in the conventional pocket camera, the paper cassette 14,
+514 This is stored according to the thickness of the paper. 5, the same magnet piece 24, the sensor 26.27 for fj' 113 on the west side; insert the cassette as shown in Figure 2, and place it on the bottom of 29. Then, the presence or absence of the magnet piece 24 is detected at 27,
The detection signal is sent to the control printing device 30 as shown in Fig. 1C. .

To explain in more detail, the paper sumo wrestler identification part Y of the mouth is
The sensor 27 is a reed switch sensor that is operated by a magnetic field, and consists of 4 pieces of sensor 2627E, which are turned on when the magnet piece 24.5 is turned off. 2-7 As soon as the machine starts operating, 2', that is, 16 types of paper sizes are detected (j-L').

That is, in accordance with the 5th division 1ζ1 table as shown in Fig. 5, four types of magnet pieces 7AG, 24b, 24C124d
(Magnet piece 2 of cassette 15! 5a, ', bh, 15cm
rd is the same, so the details are omitted) The cassette 14I/c binding sheet 2'L can be selectively loaded with 16 types of paper sizes.

The T-TC controller is connected to a constant -1 voltage power supply, I'L
f resistance 31. Input [] From buffer 32 and microprocessor 33, reed switch sensor 26α
, 26b.

26C-126cl (7) The input terminals of the 7732 (Z, 32 A, 32C, and 32d) are L'/l God level when the power is 2), and HJ and g when the power is 2).
The h level signal is input manually 3n, input buffer 32a~
32d? A transmission 81' is also sent to the input port of the microprocessor 33 via 5 [Natsumata.

In such a conventional paper paper cassette identification device, the 2' (=+6) Yuzu no Tsuki 4 paper cassette Y can be identified by the four glued switches 26α, . . . 26 d.

1. The conductor 34 from the e-reed switch sensor 26 to the control circuit 30 is connected to one paper force sensor) t4Vc, then 5 (signal line 4) - common ground wire 1) 34 a, ,
34 h, 34 c, 34 d, 34 e and [-
A lot of degrees.

Moreover, JH Paper Kananatsu l-14, 15&'! , since there are two tiers of jocho, a total of nine igobun lines are required, and
The number of elements in the control circuit 30 VC and the number of reed switch sensors 26 and 27 are doubled7. Therefore, in general, 2N types of paper cassettes can be identified by N sensors, but if the signal is (N + l) However, N input circuits are required in the control circuit.

In addition, in a copying machine that has a cassette insertion slot in the
tNXm+ll signal line and NXm
An additional input circuit is required, and the cost increase can be avoided.
I won't.

If the magnetic piece falls off during handling, it may be mistaken for a J-size cassette, and the paper cassette may be mistaken for a J size cassette.
It becomes impossible to detect 9 drops, and the reliability is extremely low.

■Another example of eliminating the five disadvantages mentioned above is to install resistors with different resistance values depending on the size of the paper into the paper cassette. The thickness of the paper can be determined by inserting it into the main body of the close-up camera and detecting the resistance value of the four cassette resistors.

In other words, as shown in FIGS. 6 and 7, a resistor 40 is integrated with the device υ′ on the front end surface of the paper cassette.

The same resistor 4 (HX resistor casing 41, a resistor 42 with a predetermined resistance value, and a terminal 21 on both sides of the resistor element 42 is connected 2' and protrudes from the casing 41. 4:3 and Yori Natsumata.

At the back of the Tk close-up cassette insert ff1sx, 29, there is a connecting part hole 5 that removably fits with the connecting male terminal 4 of the 5vc resistor 40, as shown in Figure 8. In Fig. 9, the same connection 44 is connected to 4'B through the signal line 45.
-Iti is a prisoner of the aircraft! It is connected to the resistance value detection section 47 of the I goya 46 ('16, the resistance value detection section 47 for I is an analog digital converter) and the input voltage is 3 digital values (Dn to Ds) VC. It is converted and input to the input port (pn~pql) of the dividing section 1 circuit 48, so that the '11N of many kinds of cassettes and the different input r15 are inputted through the two signal edges 45χ.

The problem here is the connection male terminal 13 on the paper cassette side.
When the paper cassette is repeatedly inserted and removed, there is a possibility that the connection may become loose and the connection may become incomplete. If this happens, the resistance value of 2'L appearing at the end of Ibo No. 45 will change, causing a malfunction that will lower the predetermined output voltage V5.

In the preceding embodiments, the resistance value of the resistor 42 and the size of the paper Vc were changed in increments of 100Ω, but as shown in FIG. The resistance values Rγ and R of resistors 49 and 42 are
Since the resistance ratio due to s and the partial voltage 3 t'L 1 value, the error in the resistance value RJ- of the resistor 42 has a large effect on the identification of the voltage 5. Ah, °C is also the variation in the resistance value of the resistor 42.
Since 2'L cannot be avoided to some extent, there is a high possibility that it will cause malfunction.

As shown in Fig. 7, the follower male terminal 43 is protruded from the paper cassette in the paper cassette 5, so the close-up camera body [
If you don't fit it to the outside, it will hit the inside.
There is a risk that the connector may become stiff when being moved and damage the male connector terminal.

The purpose of the present invention is to overcome these disadvantages and to invent a paper cassette identification device for a paper feed photocopier, and the following are the objectives and details:
The type of paper cassette is detected by the switch operation,
It detects the digital value and converts it back into a digital value, which simplifies the wiring process by changing the value.Actually, it is possible to identify the type of paper by paper identification device. It is in the point of providing.

The structure of Moxibustion 1 Mi U 1 Ratio Moxa I and Ming will be explained based on Figure 10 □ In the Denryo photo close-up machine that can take close-up pictures on paper of different sizes, A is the intangible body of the limited copy machine, B is prepared for each large sheet of paper, and is stored in this paper cassette.

C is stone 1 paper cassette l-B has 2” paper →
There are a number of actuator actuators arranged differently for each cassette with different sizes, and D is provided on the A side of the close-up camera (4) and is located on the A side of the close-up camera. 1 and E, which are the means of combining both numbers, are the digital analog conversion + stage that converts the operating state of the switch living membrane of the same awakening number and the analog quantity vc, and F is the digital analog conversion + stage that converts the analog quantity vc of the switch living membrane of the same awakening number. Once converted, the 1-T core is used as an analog-to-digital conversion means to convert the digital value to VC.

Since the present invention has the above-mentioned 5vc14°n storage, the switch means is selectively operated 1t from the muniactuator CVc according to the paper size, and the operating state of the switch means is digital. 1'10g converting means E converts the wiring into 10g quantity, converting it to a 10g amount, and converting it back to a digital value using the A'7'' log/digital conversion means P', thereby identifying the type of paper cassette. It's a matter of making sure you do it.

Embodiment An embodiment of the present invention will be described below.

Figure 1 is a perspective view of the paper cassette in Example Ia.
There is a protrusion N+ (
51 is formed into one piece with the cassette.

The number and location of the protrusions differ depending on the size of the paper that can be stored in the Paper Rikishitsu l-50, and in the non-example
S. Up to 4 protrusions can be arranged (a size, 16 types of paper cassettes can be divided into 2 types).

FIG. 12 is a schematic cross-sectional view showing the state in which the paper cassette 50 is fitted into the main body 52VC of the copying machine. 53, the close-up camera body side 52 is equipped with 2'L f, - press 1
~The button type switching switch is connected to the paper cassette 50': = rt, r, the same paper cassette 5 is connected to the knee
Four IKCVCs are arranged at the position where the 0 side protrusion 51 is arranged.

Among the four push button type changeover switches, the protrusion makes the switch 2'L T push button type changeover switch. If there is no switching protrusion and the switch does not operate, the push button type changeover switch 53 is a conventional clove, and the type of ℃ paper category with the operating state of this pushbutton type changeover switch 53 is detected. It is something.

Next, the circuit diagram of this embodiment will be explained with reference to FIG. 13.

54 to 57 are the contact points of the above-mentioned push button type switching switch 53, respectively, and it is the following point S,
-37, 33o, J: ? JS4 Torn Each resistor with a resistance value of 2R is placed over 8 consecutive resistors, and the other end of each resistor is connected to the adjacent Connected with a resistor δ2'L, connected to the point S4, l'L fC resistor further has two resistance values R and 2R.
The resistor circuit 58 is grounded through the resistors, and has a ladder-like structure as a whole.

The meter side of the switching point (the 1-stone side in Fig. 13) is connected to I, followed by the reference power supply 59, and the break side (K in Fig. 13).
The left side) is commonly grounded.

In addition to the following triangular resistance (f, M x
point (use for voltage 1tk with resistance 60)
After determining the effect as a buffer, its output terminal is connected to the non-inverting input terminal of the arithmetic operation unit 6].
Converk (Ablog Digital Transformation Circuit) 62
(7) Connected to the input 1J terminal.

A/1] The converter 02 converts the input voltage to a digital value [f] as a power supply for the reference power source 5() and outputs the input voltage of the input voltage controller 3iC.

In the circuit as described above, when the push button type changeover switch is operated by the protrusion 51 of the paper force center, it short-circuits the slave side contact on the megure side, and when it does not operate, it always short-circuits the contact on the break side. .

Depending on the operating state of the switch, the resistor path 58
) The voltage at the output terminal X changes stepwise.

In other words, all 7 switches are shorted on the break side.
If the voltage at point X is O volts, and the voltage at reference power supply 59 is Vref, then only the S1 contact has a meter +11!
8.4 is the voltage at the output terminal O. s””! ”z i
Similarly, S2. S, , S, only one contact is made according to the make rule, and the output end
Voltage of, order, Vr>4. Vrfs,
'``Force''``t''z show-r.

For example, only spots S3 and S are made 11 at the same time.
f! 1K. No, □Work (Vr>8.Vr%6) * y
v □ 5 voltages. In this way, when the simultaneous VC multiple switch short-circuits the meter side, each of those switches independently connects the meter Il+! In the case of a short-circuit at the I terminal, the voltage will be superimposed and the output voltage will be reduced.

Shit Kogatsu 1 make tfl! If the combinations of switches that short-circuit lv are different, the output voltages will also be different. Since there are four switches, 2' (=16) output voltages are obtained.

The output voltage Gj at this point X is controlled by the voltage follower circuit of the operational amplifier 61, and the voltage value is stabilized by the voltage ΣHv.

Output to A/D converter h2 as z′cil＾A /
The D converter ()2 converts this voltage to an 8-bit digital value. At that time, based on the reference voltage Vref, all switches are shorted on the make side and the digital value is 16. Set it so that it becomes FD in hexadecimal number (HEX).

Points Sl and S2 of the push button type changeover switch 53
, 83, and S4 are each short-circuited by meter +m
''', and if the break side is short-circuited again, it will be turned on.
Then, the operating state of the switch (“l” “0”
The upper 4SL 4 bits of the output of A/D Humbertaro 1 are the same as the digital value rl (status).

The above cassette types and the operating status of Suisogo, ts
/ Input voltage V of the D converter 62. , the relationship between output digital values (hexadecimal numbers) is shown in FIG.

In the same figure, it shows the ratio of the output voltage to the reference voltage by the τr &
-=T XV r 8f relationship '6''1ffi') stands.

Figure 14 of the same figure also shows three values of the voltage (minimum value, ideal value, and maximum value) assuming that the reference voltage Vref is -3 portons and that a fluctuation of ±0.16 volts is expected. There it is again.

Note that if the voltage fluctuates, it will fluctuate in the same way for all cassettes, so it will not affect identification.Although the resistance value of the ladder resistance circuit 58 changes due to changes in humidity, the value of the voltage ratio r is almost constant. be.

In this way, is the influence of external factors extreme? I) '''C is low and reliability is high. 'J So Prada - Resistor circuit 58 etc. has one output terminal, so only two signal lines are required in addition to the ground line, and the buffer Only one circuit is required, and the wiring within the machine can be completely simplified.1.Furthermore, the push button (protrusion 5 on the paper cassette side that operates the 7-button switch) is formed integrally with the paper cassette 50. You don't have to worry about it falling off when you use it, and the 2 spherical protrusions prevent it from getting in the way, making it easy to use.

In addition, in the actual example 1i, there are 4 push-button type changeover switches, and the output of the A/D converter depends on the 8-bit digital value, so the maximum is 2 (= 2561 types can be identified, and If four push button type changeover switches 1101 are added and the resistance of the ladder resistance circuit 58 is increased, it becomes possible to identify 256 types of paper cassettes.

Moreover, just two signal lines are sufficient as in the above case.

The effect of simplicity In this way, the digital/ablog conversion circuit such as the ladder resistor circuit or the like can be used to intervene in the middle of the analog conversion. Is that a signal for 2 heather? There are many kinds of III
Since paper cassettes can be identified, internal wiring can be simplified, and the reliability of identification is extremely high.

Furthermore, it is integrated with the Riko Unitan Kawagami cassette, which has a switch operation on the side of the paper compartment, and can be made into a spherical shape so that it does not get in the way, making it easy to use and prevents damage. I'm not afraid to do it, it's okay.''
There is no chance of C malfunction (and from this point of view, it is important to consider the sword 5 to be high).

[Brief explanation of the drawing]

Fig. 1 is a front view showing the interior of a close-up photographing machine to which an embodiment of the conventional and uninvented paper cassette identification device is applied, and Fig. 2 is an enlarged front view of the main parts of the conventional paper cassette identification device. figure,
Fig. 3 is a perspective view of a paper book J set used in the identification device, Fig. 4 is a circuit diagram of the identification device, and Fig. 5 is the relationship between paper size and the presence or absence of magnet pieces in the identification device. FIG. 6 is a perspective view of a paper cassette of another conventional paper cassette identification device, FIG. 7 is an enlarged perspective view of the main part thereof, and FIG. 8 is an enlarged front view of the main part of the same η11 container. FIG. 9 is its circuit diagram, FIG. 10 is a diagram of the uninvented claim KTL, FIG. 11 is a perspective view of the main part #l of the paper cassette that is put into the paper identification device according to the uninvented claim, and FIG. In this embodiment, the paper cassette is fitted into the main body of the photocopier, and FIG. ls diagram, Figure 14 shows the types of τ cassettes in non-implemented 1+FI,
3 is a chart showing the relationship between the operating state of a switch, an analog voltage value, and an output digital value. 1. Original figurine stand, 2. Irradiation lamp, 3. ° condensing lens. 4...Reflector, 5...Drum-like feel, 6...
CHF-diflotron, 7-pass development plan, 8...Developer, 9-Pabe transfer lamp, 10...Transfer corotron, 11-pass electric port 1-a, 12...
Pre-clean corotron, 13... blade, 14, I
5... Paper cassette, 16° 17... Paper feed roller, 18... Gate, 19... Monthly paper transport bell l-+
20・Standard scraper, 21・Heating roll, 22・Additional 0-/l/, 23=・Export port, 24, Z5=i stone L
1″, 26.27・Re-1 switch sensor + bracket,
゛, 0...Cassette insertion ■5, Addition...Control device, :3
1...Resistor 532...Manual buffer, :(3="Microb a processor, 34...Conductor, 40...Resistor, old...Resistor case, 12...Resistance element, 13...
Sliding navy blue terminal, 44... ■Ayabe, 15... Signal line, 4
6...System store part 1, 47...Resistance value detector, 48...11
-J subcircuit, 50... paper cassette, 51... protrusion, 52... close-up camera body. 5...Push button type changeover switch-54, 55, 56,
57°゛. (Dot, 58... Rutter resistance circuit, 59... Reference power supply, 60... Resistor, 6]... Operational amplifier, 02...
・A/D converter. 6:3...Humpiyuta Entrance Capo-111, Agent Patent Attorney Ebara Mogai 2nd Ward-5 Corner 3 Hanging 4 Figure Tail 5 Party Seal; McQueent, Figure 10

Claims (1)

[Claims] In a printing machine that can copy paper of different sizes, there is a 111-inch paper set for each paper size, and a 1-ton paper cassette is provided for each paper size. actuators arranged in different arrangements for each different paper cassette, and a dispersion switch that is provided in the copying machine and is selectively operated by the actuator. The operating state of the tsuko means is converted into a 710g@ by a digital/aromatic conversion means, and a digital/alog conversion means is used to convert the operating state of the 710g@
The analog/digital conversion flat stage that converts the data back into digital values and the copying machine's paper type identification system have the following characteristics.