JPS5915263A - Copying machine - Google Patents

Abstract

PURPOSE:To detect automatically contamination of an optical detecting means, and to prevent a malfunction, by providing a means for displaying it to the outside to have detected a fact that a drop of quantity of light which is made incident to a photodetector exceeds a fixed quantity due to contaminatin of a light emitting element or a photodetector, etc., or for cleaning the contamination. CONSTITUTION:In addition to the first reference value for controlling the supply of a toner, the second reference value required for cleaning the contamination of a detecting menas 16 is set, and in case of [a detected value < the first reference value], an output of a comparator IC1 to be L, and a motor M for rotating a toner supply roll 11 is turned off. In case of [a detected value > the ninth reference value], an output of the comparator IC1 to be H, and the motor M is turned on. Also, in case of [a detected value > the recond reference value], the detecting means 16 has no contamination or is not contaminated so much, and in this case, an output of a comparator IC2 to be L, and an alarm lamp PL is off. In case of [a detected value < the second reference value], the contamination is advancing, and in this case, an output of the comparator IC2 to be H, and the alarm lamp PL turns on.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine, and more particularly to a first technique for ensuring that all optical detection means used therein operate normally.

BACKGROUND TECHNOLOGY In general, in a copying machine, as part of the 1-ner speed control means, a 1ζ element for detecting the image latent image of a reference latent image, an IC element for detecting the passage of a paper roll, and an optical element are used. An optical detection means consisting of a pair of blades and a light receiving element has been installed.

However, this optical detection means is easily contaminated by I.na, etc., and when it becomes dirty, the detection ability decreases by 1 degree, making it impossible to expect accurate detection. Therefore, the detection means described in 11J is cleaned periodically, but it is difficult to accurately judge the timing of cleaning, and it is impossible to deal with sudden stains.

Purpose: The present invention has been made in view of these drawbacks, and its purpose is to automatically detect dirt on the optical detection means and to always provide accurate optical character IJ'J detection. Our goal is to provide a copying machine that works.

SUMMARY In order to achieve the above objects, the copying machine according to the present invention includes a means for detecting a decrease in the amount of light incident on the light receiving element based on dirt on the light emitting element or the light receiving element, and a means for detecting a decrease in the amount of light incident on the light receiving element based on dirt on the light emitting element or the light receiving element. When it is detected that the amount exceeds a certain amount, there is a means for increasing or decreasing the amount outside the 7ζ or IJ11.
′! −;Means for cleaning the can++ii+e/here and order:
Characteristics - Shume.

Embodiment FIGS. 1, 2, and 3 show an example of the J cusp of a shallow-cut rock.

In Fig. 1, 2 (1) is a 1-inch native drum, which can be driven to rotate counterclockwise in the figure. (2) Hara] 1゛4
On the base glass, there is a λ Gyan ijJ function on the left side of the figure. (3
) is the 1ζth reference pattern for toner a degree control, and is completely installed on the surface of the 1] IJ end of the document table. (4) is an optical system consisting of a light-focusing fiber array, which is placed several times on the -11 notation semi-pattern (3) and the original platen glass (2), and the reflected light of the 7ζ original (illumination light #i is (not shown) is projected onto the photoreceptor drum (1) in the form of a slint.

(5) is charging charger A'-jar, (6) is Kawahara device, a4
is a charger for transcription, bet is a charger for copying paper,
0 is a cleaning device for residual 1-ner, (1 is the earlamp of Ryuga Takitase. (7) is a developing sleeve,
1 Melting air roll (8) has a bulge inside and a flange on the outer circumferential surface.
16 lights 1 netrum (1) with the FD care brush of development polishing
''The second part of the image is a blank latent image. GO is a toner replenishment device, which corresponds to the rotation speed of the toner sleeve supply roller (Jυ) and transfers this amount of toner to the developer in the developer tank.
lli supply. The developer is replenished to η[7tl・
The toner is stirred together with the toner by a bucket roller (9) and conveyed to the vicinity of the developing sleeve (7).

(IO is the image density detection means, which is composed of a light-emitting diode (I"+) optical element (16a) and a light-receiving element (161) consisting of a first transistor),
Light-receiving cable (16b) Developed by the size of the output of sword S et al. I11
! I earn a lot of money.

That is, in the above (configuration), as the 11J process for copying without reeds, the reference pattern (3) is formed on the reference latent or photosensitive drum (1), and this & semi-latent @ is formed on the developing device ( 6), the developed image of the standard number is transferred in the transfer section and is transferred to the detection section without being tampered with.
The image density is detected at Q. As a result, if the detected value is lower than the reference value, the developed image density is too high (toner adhesion amount is large and reflection amount is small), so the toner replenishment is controlled to be stopped. -1i Shiroyoshi1
The drawer 71 has 1 developer, 1 tsuka horohiki or small (1 ゛ 1, 1 M, 1 tsuka, 1 ↓ person), so the control side is instructed to restart the 1-ner capture. As a result, after this control, the four times the original disaster, which is the same as the original disaster, can be kept constant.

In this case, the light emitting element: f(-16aJ, the light receiving element (I6b
) to toner ("If you wear 4 clothes and you're not smart enough, your father - Souko (
16b) 1 missing 1it1 is recessed in a phase gradient, and the normal toner 611 and inertia control do not jump to the 1-1 rope.
sleeve? [If a bank is needed, the t゛supply count is not issued, and the 1st unit of the bank is not issued.(6) 1st unit of 1st unit is given by 1 person, and as a result, the ! ! l11 ``I'll give you some credit for the translation.

Therefore, in this 1st example, 1.S-? +h *This value is different from the first standard value of
2nd ) 11 and 1[L necessary to clean the dirt in 1Q
Set 1 and lower the detection 1 [11 or 2nd base 717-1 one floor lower than the old 717-1] so that the lIj alarm lamp lights up.

The specific control side Jro is shown in Figure 2 as 7fZ-dong.

Comparator (IC1) controls toner supply control 1.
One input terminal has a light receiving element (16
1)) and the end of the resistor (R2), that is, the photodetector (1)
61 side test 1111 input 7″L, other input terminal r
3), the terminal 1lJ1 potential of tR4), that is, the first reference value, can be manually exceeded.
The output of C1) is manually operated on the opening side 1 device, AiJ notes] - Auxiliary shaft low (11) 4 times 1 maze motor G - 1 turn off - open.

The comparator (IC2) is the detector F9-
(Ifil is dirty and busy is detected), one input! 1) 1'' layer detection 1j port is manually connected to LH11 child, and the other input terminal is connected to resistor (Rs) and variable resistor (VR).
2) The potential between the terminals, ie, the second reference IIp, is manually input. The output of the comparator (IC2) is also input to the control rlI41 device.
r On-off system FD-r. IJ'J ME: Light-receiving element (161)) The resistance value of the photo 1-transistor changes depending on the sum of incident light, and the current flα increases in proportion to the increase in incident light. And, the light opening of this human pruning can be adjusted with variable resistance VR,).

Therefore, when [detected value > first reference value], the output of the comparator (ICIJ becomes L, turning off the motor (c). The output of the motor (I) is 9, and when the motor (N force is turned on. l/ζ, [projection tJ unit second reference value]), the detection means (113 + F ('i 21. yi・
No, the 1% culm is not a warning stand, and the output of the comparator (IC2J becomes L'', and the warning pump (l''L)
is off'T: Yes. [(protrusion f[1<second group i'l''
, It self], the eye IJH self dirt has progressed, and in this case, the output of the comparator (IC2) (1"t-
1'', and the signal lamp (Pl-) is turned on. In this case, either the Seabisman is busy or the user asks to clean the detection means 0→.

It is formed on the light body drum (1), and the timing of detecting the degree of painter a of the semi-deku hall is 1 V = = 19! ri, i point out means (](i
l's (r3 remu (prominent Yu/Iminoji is also standard +!!
! This is synchronized with the detection of Satsuma. It should be noted that the latter timing does not necessarily need to be rotated with respect to the timing described above. For example, the rotation may be made at a timing when the unshielded portion of the non-image portion of the photosensitive drum (1) is delayed to the detection section. However, in this case, it is necessary to change the second reference value r in advance according to the surface condition of the photoreceptor drum (1).

FIG. 3 shows how the light receiving element (16
b) (7JI'A Ex 11 shows the change r.' Status (Vl
) This is the potential between the terminals when toner immersion is at the reference value when IDi'in does not occur, and corresponds to the first reference 1m in IJ. The status (v2) corresponds to the second reference value, and it is assumed that when the nil electric potential (v) is 40% underground, dirt on the detection means (161) is detected.

Timing of dirt detection KETNER'/EA When synchronizing with timing of fX detection, f'5 of detection means Q
It is not possible to clearly distinguish between n and 1-ner degree.

Therefore, it is necessary to determine the potential (v2) of dirt and excrement by taking into account the width r of the toner scattering meter in the developer. Action 1'"It is necessary to narrow the possible range. Specifically, the detection means (light receiving element (161) when there is no dirt and the toner concentration is at the maximum allowable value) It is desirable to set the potential to be equal to the detected value of .

On the other hand, when the timing of dirt detection is not synchronized with the timing of toner abuse detection, dirt f'L&! Output potential (
v2) is related to 11J Tonah-1 paternal movement correction width (:1
There is no need to set it to 1, and you can set it to 1.

In addition, in this first failure J) (1) example, the actual means 06)
Power) Similarly, if the sword S's IJr- is inactive due to Natsu 74, +? The output of iJ comparator (IC2) is ',,
//, and 1 lamp (PL) is turned on. As described in 13iJ, when synchronizing with the detection of Topu-7 agricultural degree,
Toner 7 degree is abnormally exceeding fl: volume 1 + crystal (°be
The same is true for Fa%.

Next, I will spell out the second ¥ example. Second example 1U1
In place of the vinegar-colored pump (P l-) in the first example of Section 1,
Detection'' - Stage OQ's 711 sweeping means is installed/small, and the other destruction is the same as the first real 7#11 daj.

For example, the cleaning means is shown in Figure 4 (17'): ``i~ Air 1 blowout method Figure 5 V Kono J < Just a leaking brush method is adopted. That is, the air jetting method Q. KO: Connect to the air-generating device (7!0) / ζ air non-null (21)
)'z, UNI'71, 1 piece of transparent glass (16'aL (16b)) facing the detection means (to),
Transparent crow (16~, (16J) has a light emitting element (1
6a), the light-receiving element (16b) (the housing is removed). ′［
Shi, Nonuru (21) to Air to Gala 7 (16'a
), (77 towards 16'J) and put out one pawn, Ga 5. '(1
6'■, (16'Jν111 is applied and 1ζ toner etc. is removed.

The cleaning method is to form an open rJ (13)k, and add brushes (24 holes and flocking) to ZC plate parts t, 7 (
22) k J installed on the front surface of the protruding means uO, and the plate part 17 (
22) One end of the lever (25) is connected to the solenoid (2).
7), and a return spring (28) at the other end.
The lever (25) is attached to the support shaft (29).
Turn around 6) as the fulcrum! It is April 1st.

When the output of the comparator (IC2) is L,
The solenoid (27) is in the off state, and the board (22)
At the return spring (29), turn the arrow (move in the ml direction and turn V)
Ru. At this point, the detection means Q is the opening C of the plate part IH (22).
, ]C3) The r plate is entirely facing the I photosensitive drum (]). Comparator (EC2) output is 1ζ to IL''
Later, when not copying, the solenoid (27) is turned on, the 1-langeer (28) is retracted -t7', and the lever (25) is set to 1.
The plate member (25) rotates one clockwise, and the plate member (25) moves as shown by the arrow (E).
move in the opposite direction. The solenoid (27) immediately turns off the grinding plate member (22). At this time, the brush (24J or 57 of Q61 (, 16a
) A16b) k J x m < L, force 5. IK (16a)
,l.

16b ノ 2V: 1 night 7 1.
Boo-4, remove 〒τ.

In addition, Fufushi (? 4) is acrylic jijiJ I compensation →,
Is there a lot of pressure on the commandments, etc.? You can also choose cJ sori, 1: Suzukichi, Ranaru I1j.

Mutual 1ζ, rJjJ M's own thing (high 1 is not dependent on the 4 actual height means of toner pear, and the bending of the copy paper is 1-1.)
It can also be applied to a single-wavelength detection means, in which the amount of light is constant and greater than that of a bell helmet, unless there is an actual hanging means, that is, a straw paper.

As if the spell was more than effective, the light-emitting element, the core, the light-receiving element, and the light-receiving element were dirty. There is a means for detecting the amount of light that falls outside the human body, and this detecting means detects whether the amount of light has dropped or is less than a minute away. The means indicated in Part A or iiJ ('3) In order to set up the means for cleaning, the optical detection means must be dynamically detected, error 1' [However, it is possible to prevent accidental detection by attaching accurate optical detection.

4 Explanation of 1 in 1 for Figure 1 Figure 1 is the first example of the first sky of Shunshaiso, r7Jξ
Fig. 2 shows a set of control circuits, Fig. 3 shows the changes in the detection value of the detecting means, and Fig. 4 shows the club in the second embodiment. Fig. 51 is a perspective view showing an example of the cleaning means; Fig. 51 is a perspective view showing an example of the cleaning means;

(1)...Photosensitized tiger J..., qQ...detection means (I
CiaJ...Light emitting element, (16bJ...Light receiving element, Re-air bubble f+s+, (21)...Air nozzle, (22)...Plate part (Δ, (24)...Brush, (27)... ° Solenoid 1-゛, (Ic,)
.

(IC2) ・Comparator, (PI-)...
Patent applicant Minolta Camera Co., Ltd. Representative Patent attorney Hao Aoyama and 2 others

Claims (1)

[Claims] In a photocopying machine, the amount of light incident on the light-receiving element based on βjf'L of the light-emitting element or the light-receiving element, etc. A means for detecting a drop in the amount of blood, and a means for displaying it on the outside of the tray when the detecting means detects that the amount of light is one level below or above a certain level of blood, or a means for displaying it on the outside of the tray or cleaning the tray. Tawara Shaya uses 11 means and uses fζ, also known as r Saijiune.