JPS61204646A - Developer - Google Patents

Abstract

PURPOSE:To reduce scattering of toner, to stabilize the density of picture quality and to improve closeness by using specific toner and carriers for a two- component developer consisting of toner and carriers. CONSTITUTION:The two-component developer consisting of toner and carriers use carriers of small particle size which are fine surface crystal and consist of <=10wt% of carriers of <=44mum in particle size so that their peak size is 44-105mum and toner of small particle size, e.g. <=11mum. the carriers use ferrite carriers (nickel, zinc, barium, or manganese) of small particle size and image density and the quantity of electrostatic charging become stable because of the use of the carriers of small particle size. Fogging is reduced because the particle size is <=11mum, and more stability in image density is obtained by the additional use of the ferrite carriers of small particle size. Consequently, toner scattering is reduced, there is neither blurring nor fogging of characters, and picture quality with high stability in picture density and picture quality is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developer that can be used, for example, in a developer unit 1VcJ of a copying machine, and particularly to a two-component developer consisting of toner and carrier.

[Technical background of the invention and its problems]

Typically, current devices such as Hikishaiso use a two-component developer consisting of toner and carrier.

However, conventional developers of this type.

A gear having a grain size of 74 to 150 μm and one surface having coarse crystals was conveniently used. Therefore, there are serious problems in that the toner is not uniformly charged, the toner is likely to scatter, and the density of the image becomes unstable.

On the other hand, if the proportion of minute carriers is increased, the charge amount of the carriers will increase, the per-picture density perception will decrease, and the life will be shortened. Also.

There is a problem when black spots occur on the photoreceptor drum due to hot spots.

In general, conventionally, large particle diameter toner of 12 to 15 μm is used as a toner, which has a small band and causes bleeding and fogging of characters, as well as an increase in the instability of the artist I11 degree. .

[Purpose of the invention]

The present invention is based on the above-mentioned circumstances and aims to provide a long service life, less toner scattering, and less smearing and fogging of single characters.

The image @a■ is highly stable and provides highly detailed image quality.
To provide a developing agent which allows good developing without any change at all even if development is carried out in a state in which the amount of storage of the developing agent is somewhat reduced compared to the KTM semi-developer storage amount. It is.

[Summary of the invention]

The present invention achieves the objects mentioned above. In a two-component discoloring agent consisting of a toner and a carrier, the proportion of particles having fine surface crystals and a particle size of 44 μm or less as the medium is 10% by weight. Yaria, which has a small particle size with a peak of 44 to 105 μm, is also used as a toner.
This uses toner with a small particle size of μm or less.

[Implementation sequence of the invention]

Hereinafter, an embodiment of the invention will be described with reference to FIG. I11]k.

Figure 1 is an external appearance diagram showing a two-color color copying machine with a moving original platen type as a line of the existing apparatus of Type I, to which a developing device using the developing agent of the present invention is applied.

The second factor is the longitudinal front view. In other words, l is the main body of the copying machine, and around this time, on the upper surface of the copying machine 1, there was a
A reciprocating document table 2 is provided in the direction (direction), and an original document cover 3 is provided on the document table 2 at the opening/closing opening 1. Further, a paper feed cassette 4 is mounted on the right side of the main body 1, and a paper discharge tray 5 is mounted on the pressure side VC.

The paper feed cassette 4 is detachably attached to a neat paper feed section 6 provided on the lower right side of the main body 1. In the paper feed section 6, 7 is a paper feed roller that takes out the paper P1 one by one from the paper feed cassette 4, and 8 is a paper feed roller that feeds the paper P1 from the rough or mechanical paper feed device I and transports the paper P1. This is a pair of aligning rollers, and in front of this pair of aligning rollers 80, a detector 9 consisting of a detection lever for detecting paper and a micro switch φ is provided.

In addition, the paper feed cassette 40 cassette cover (upper surface) can be used to manually feed paper (possible when automatic paper feeder 1 is not installed) or to automatically feed paper into paper feed tray 1.
0, and an automatic paper feeder 11 is placed on this paper feed tray 10.
In addition, a paper width adjustment guide 12 is provided on the paper feed table 10 on the paper insertion side of the automatic paper feeder 1.

The above-mentioned sliding paper feed HRII continuously feeds the paper P set on the paper feed table 10 one sheet at a time to the paper feed section 6, and has an attachment/detachment mark for the right vJArjn of the main body 1. It has become.

Further, a photosensitive drum 13 serving as a photoreceptor carrier is disposed approximately at the center of the main body 1. Around the photoreceptor drum 13, an exposure optical system 14. Charging device 10
00 color color processing device 16. Transfer charger 17. Stripping charger 18, cleaning device 19. The artificial static elimination lamps 20 and the like are sequentially arranged along the direction of rotation.

Further, the current RLL device wL16 is divided into a first display device J6B of a la brush type, a second display device 16b and a VC2, each of which is detachable from the main body 1.

The reversible motors shown in the figure above rotate forward or reverse in the @works planning unit 16m and the second planning unit 16b.
This is very black or another color, such as red,
Colors such as yellow, blue, and green can be selectively performed by active troops.
c.

On the other hand, a pair of aligning rollers 8 are provided at the bottom of the main body 1 to 3.
A paper conveyance path 22 transports the paper PK or P, which is processed and sent, through a transfer unit 21 between the photosensitive drum 13 and the transfer charger 17, and then to the paper output tray 5. . 1iI upstream of the transfer section 21 of this paper conveyance path 22
II vc is provided with the aligning roller pair 8, and on the downstream side, a fixing device 23 and a paper discharge roller pair 24 are provided.

Here, the exposure optical system 14 has a reflector 25 at its back.
exposure lamp 26° mirror 27~jO,
and a lens 31 whose position is moved according to the set magnification?
It has become a II with I-.

The photosensitive drum 13 is driven in the direction indicated by the arrow in the figure by a drive mechanism shown in Figure 1 in synchronization with the original 1gA stand 2. First, it is uniformly charged by the charging device 15, and the 4
The source lamp 26 is uniformly irradiated with the source, and the image of the next original is 4.
The original photoreceptor 14 is connected to the photoreceptor drum 13 to form an electrostatic latent. This electrostatic latent image is formed.

The phenomenon device 16 takes into consideration the current irrigation agent.

It is sent to the transfer charger 17 side.

On the other hand, the paper P1 or P fed from the paper feed cassette or the automatic paper feeder 11 is fed to the pair of aligning rollers 8, and the developer formed on the photoreceptor drum 13 is charged for transfer. The image is transferred by the container 17. The paper Ps (Pt) to which the gap agent I has been transferred is transferred to the peeling charger 1
8, the paper is peeled off from the photoreceptor drum 13, and the paper conveyance path 2
2f and is led to the fixing device 23, where the transfer I is melted and fixed, and then transferred to the paper ejection tray 5 by the paper ejection roller pair 24.
is discharged to.

On the other hand, after the developer is transferred onto the paper P, (Pt), the residual toner remaining on the photoreceptor drum 13 is cleaned by a cleaning device 19, and the remaining toner on the photoreceptor drum 13 is removed by a static elimination lamp 20. is erased so that one can be used for the n1th continuous shooting operation.

In addition, 40 shown in Fig. 2 is a power transformer.

Reference numeral 41 indicates a toner replenishment device for the drain construction equipment, 42 indicates a toner replenishment device for the second construction equipment, 43.44 a toner concentration detector, 45 a paper discharge switch, 46 a static elimination brush, and 47 an exhaust fan. .

Next, the driving force transmission system will be explained with reference to FIGS. 3 to #Xs. FIG. 3 is a view of the entire internal mechanism of the calculator main body 1 and the moving sheet feeding device 11, as seen from the back side, and FIG. Leave it in the open state. In the figure, 52 is a support shaft that pivots the upper unit 50 and the lower unit 51.

Further, 53 is a drive tooth I directly connected to the main motor 48, and the driving force of this drive 1dij[5J is sub-mm1Ls
a ~ s 6
7 to transmit the driving force.

The driving force of the drive gear 53 is as shown in FIG.
! Aligning a-ra via lIJ gears 58-62,
Transmitted to drive @IL6 j, furthermore, slave @J@M, 6
4'i, it is transmitted to the paper feed roller drive gear 65.

Further, the driving force of the driving gear 53 is driven by the aligning roller through the driven gears 11!1iL58 to 62 as shown in Fig. 5! It is transmitted to the first wheel 63 and further transmitted to the paper feed roller driving mechanism 65 via the front teeth M64.

In this way, the driving force of the rc drive gJ tooth table 53 is transferred to the drum drive tooth J.
[57 and aligning rollers! gllJyvRIL6s
When transmitting the power to the aligning roller pair 8, the drum driving power transmission system 66, the aligning roller pair, and the driving power transmission system 52 are separated by T-separation and are transmitted independently. The impact caused by front and rear load fluctuations is directly transmitted to the drum drive @ fL57.
(2) It is possible to prevent one-image blur caused by the above-mentioned impact.

(9) The paper feed roller drive tooth M65 is always in mesh with the drive tooth IL69 that meshes with the driven force transmission mechanism 168 of the automatic paper feed device 1], and is in constant mesh with the drive tooth IL69 that meshes with the driven force transmission mechanism 168 of the automatic paper feed device 1. is the copying iso body 1#l via the driving force transmission mechanism 70.
It has become possible to obtain a sufficiently large driving force. In addition, compared to a device that has its own drive, the paper feed speed is the same, the paper separation mechanism is the same, the device is smaller, the device is lighter, and the cost is lower.

Friend, the above eyes and the +tL driving force transmission teeth of the paper feeder 11! 6
8, the drive of the computer main body 11111 - the engagement with the 1L69 is determined by the power transmission system by manual operation of the automatic paper feeder 11. It becomes possible to drive.

This makes it easy to clear paper jams, perform maintenance and inspections, etc.

The symbol 7 shown in FIGS. 3 and 4 is a scanning motor, and this scanning motor 71 is decelerated by a gear head and rotates a pulley 72. Here, one end is fixed to the tip of the document table 2, and the other end is supported by a spring (not bent) at the rear end of the document table 2. The nine wire 74 is connected to the idle pulley 75 and spring 76. The pulley 7 is applied via the tension pulley 27 which applies tension to the
2 wrapped around 1.

Looking back, pulley 72 is indicated by arrow C1 in Figure @3.
When the document table 2 is rotated in the same direction (clockwise) vc, it moves back and forth in the aX direction, and when it is attached to the document table 2, fLf? -Magnet 78
When the limit switch 79 detects a defect, the pulley 72
C rotates in the same direction, and the document table 2 moves back in the same direction as A2.

Further, the scanning motor 7 is synchronized with the main motor 48 through an encoder disk 80 and an encoder sensor 81/CL.

Note that 83 is a magnet housed in the document table 2, 84 is a home switch, and 85 is a paper start switch.

Then, when the detection signal of the paper start switch 85 is detected,
A sophisticated clutch mechanism (not shown in the figure) incorporated in the paper feed roller 7 and one of the pair of aligning rollers 8 is operated.
At the appropriate timing, pay AJ1. Restart line 115
0 It is supposed to be operated by one person. 86 shown in Fig. 4 is the current slag equipment motor E111L, 87. lj8 is secondary fJIJ tooth 1.89.9
0 is the drive gear for the current fault device, 91 is the drive gear for the normal discharge o-ra @m
LL, 4? x is one drive wheel for the upper heat roller. Further, 93 is a heater lamp.

9. The paper feed section 6 side is pivotally supported via the support shaft 52.
01Jj The upper unit 50, which can be rotated, has an optical system 14° around the photoreceptor drum 13, and a charger 525 for charging. fi
Original lamp 26. Current 11 [116, cleaning device 19. A static elimination lamp 20 and the like are mounted on the edges by appropriate means, and the IJXa stand 2, the paper feed roller 7, the upper roller 23a of the heat roller 23, the upper roller 23a of the heat roller 23, the upper roller 23a of the heat roller 23, Upper roller 2 of L-shaped paper ejection roller 24
4m is installed.

The lower unit 51 also includes a paper feed cassette 4, a lower roller 8b of an aligning roller 8, a transfer charger 17. Charger for peeling 18. Lower roller 23b of heat roller 23
, the lower 1111o-ra 24b of the paper ejection roller 24, the paper tray 5. The L and I motors 4811 and the like are attached to suitable means.

Then, after removing the front cover of main body 1 by rotating it seven times, almost all the paper Ps
(Pt)t- It is configured so that it can be opened and closed along the paper conveyance path 22 for conveying the paper.

Further, an operation panel 100 is provided at the upper end portion vc of the main body 1 on the front side, as shown in FIG.

FIG. 6 shows the operation panel 100.

Calculation dl"101 for executing the calculation operation. Interrupt key 101 for specifying the interrupt mode for interrupt copying.
．． Numeric keypad 103 for setting the number of decrypted copies, etc. Color selection key 10 for selecting the reproduction color (for example, black, red, f)
4. Color display section 105 that displays colors that can be shot continuously. Mechanical paper feed by paper feed cassette 4 or automatic paper feed device 1lIIVCJ,
A paper feed selection key 106 for selecting automatic paper feed or a total counter 107 for counting the total number of copies.A liquid crystal display section 108 is provided.

The liquid crystal display section 108 includes a ring 4 sheet count display section 1091 for displaying the number of sheets, a status table section 110 for displaying various operating states such as paper jam, toner replenishment, etc.; 7"4 front leather part 112. Color finger part 113, which is provided corresponding to the color display part 105 and displays the selected color with a finger 7r'+ Cassette paper feeding mode list 114. Mechanical paper feeding device 1
Bypass paper feeding mode display section 115 for displaying the eye movement paper feeding mode. Eye vJg original mode display section 1161 manual 1
It consists of a set exposure amount display section 117 in the original mode.

Also, the front key 17 for setting the eye IJJ exposure mode.
8. Manual exposure key 119 for manually setting the true and false values.
Predetermined specific 1-photo magnification '41! Also provided are a magnification setting key 12o for selecting and setting a magnification, a zoom key 121 for setting an arbitrary calculation magnification, and a magnification display section 122 for displaying the set magnification.

At the bottom of the IA main unit, there is an exhaust fan (2) that exhausts air in the same way as the exhaust port 123 formed on the bottom of the continuous shooting machine main body 1. bottom fan) 12
4 are arranged and provided, and a fixing device 23 and aft,
A filter 125 is provided between yt and the academic system 14.

Then, a restricting means 126 is configured to restrict the offset prevention silicon vapor applied to the thermal fixing roller 23atlC generated from the heater lamp 93 of the fixing device 23 from going to the exposure optical system J4 side. It is in a state.

Therefore, the exposure element system 14 is located near the constant N device 1li23.
Even if this copying machine is located, the fixing device vjL2
Since the heat generated from the exposure source system 14 and the silicon vapor for offset prevention do not enter the exposure source system side 14VCMt, dew condensation may occur on the mirrors 27 to 30, lens 31, etc. of the exposure source system 14, causing them to become dirty with silicon vapor. There is a defective side where the copy is partially black! 'l: It is definitely preventable.

Note that the heat generated from the four-element lamp 26 of the one-element optical system 14 is removed by an exhaust fan 4 disposed at the upper part of the computer main body 1.
7, it is configured so that it is exhausted horizontally outside the camera body 1 and is not confined to the camera body 1.

Next, with reference to FIGS. 8 to 25, the gap device 16
I will explain the details. As detailed in Figure 8g8,
1st current squadron a as the current carrier of @l, which is the current acid agent transport means
-ra 131□It has a second actual roller 131° as a second actual body, and these current @a-ra 1311. 13
1° selectively to produce black (first color) or one other color (second color), such as red or yellow.

It is now possible to create color gaps such as green and green.

In other words, the current number is 11! The device 16 includes a gap roller 131
It is divided into two: a first chopstick (first phenomenon unit) 16a containing 1f, and a second chopstick (second present unit) 16b containing a second present 10-ra IsxQ; Both of these Ka1.1!2 acid vessels 16a and 16b are detachable from the main body 1. At this moment, the 111th M on the upper row!
The container 16m has a structure that allows the user to pull it out upwards in the figure, making it easy to put on and take off.
b is configured so that it can be attached to and detached from the main body 1 when a service person performs maintenance and inspection. The black toner T, which is often used for darkening, is used in the second storage container 16b in the lower stage, and the color toner T1 is used in the first storage container 616m in the upper stage.

The first storage unit 16m is composed of a storage unit 132° and a toner replenishing unit 133 included in the toner replenishing device 411. Kamiki Gentakaki l11 part 321 is,
A gap roller 1321 that supplies toner T8 to the photosensitive drum 1s through an opening 141a+ of a casing 1411, which will be described later, and a gap roller 131. The feeling of the developer magnetic brush 1351 with a pattern on the surface of the drum 1
The sliding contact area with 3, that is, the current gap position 1361 area, is also provided on the upstream side, that is, on the drain 2 display device 16b side.
7. The gap position 1351 is also provided on the upstream side, and a scraper serves as a stripping means to scrape off the developer ffl air brush 135□ on the surface of the current σ-ra 131m and guide it to the developer storage section 138□. 139, and the active agent agitator 140 accommodated in the existing iron agent storage section 1381. It has a configuration in which it is housed in a T casing 14111 f3. Note that the casing 141. At the position opposite to the upper blade part of the current roller 1311, developer G, A toner level detector 43 is attached to detect the amount of toner T1 contained therein.

Further, the developing roller 1311 has an angle α (approximately 51
), a magnetic roll (magnet) x4s whose center is located on a straight line L2 drawn so that
and a sleeve (1 general feeding body) 1441 which is fitted onto the magnetic roll 143 and rotates clockwise in the drawing.
It has been i51. The magnetic roll 143. is five [
a pole portions 1451 to 149. '(has @polar part 145, .147..149 turtle is N pole, @polar part 146,
．． 1481 is S scratched, @ pole part 1451 and 1
461 and o OF[θ, Fs, about 50', fa pole part 1
461 and 147. The angle θ between the magnetic pole parts 1471 and 1481 is approximately 71°, and the angle θ between the magnetic pole parts 1471 and 1481 (7)jQ is approximately 6
0', faMfs(514g, t149, and θ4 are each set to about 60°.

Further, the toner sleeve supply section 133 includes a toner supply section 15.
0. In the hopper 151 facing the current drug storage section 138I of the current storage mechanism section 1321.

A toner replenishment roller 152@ is provided in this hopper 1511 and closes the current chengpo supply port 150, and this toner sleeve supply roller 152゜1111vc) is used to convey the toner T1 in the hopper 1511 yen. It is equipped with a pair of stirring rollers 1531 and 153t'f for stirring.

In addition, the above-mentioned first display device 16b is the first display device 16b.
It has almost the same basic configuration as a.

A toner replenishing section 133 that constitutes the toner replenishing device 42
! The shape of the hopper 151, the magnetic pole arrangement structure of the current roll 143, and the toner #
The mounting position of the degree detector 44 is different. Therefore, other identical components are suffixed by the code suffix letter '(rrlJ
The reference numeral t has been changed from ``2'' to ``2'', and a detailed explanation thereof will be omitted. Maku, current ff7ia-la 131. magnetic σ-rule 1
43! has four fusion pole parts Z45~148, of which the magnetic pole part Z45. ．． 147° is N theory, magnetic pole part 74
It s 1482 is S-shaped, and the magnetic pole part 14
5. And 146! The angle θ5 between the 6Ii scratches 146. and 6Ii is approximately 79°. The angle θ between and 1472 is approximately 70', 1
ifi bridge 147! The angle between 148 and 148 is about 8
It is set at 0°. Also, Laden crawl 143u.

The photoreceptor F-ram 13 is provided with its center located on a straight line La that passes through the center of rotation of the ram 13 and is drawn at an angle β (approximately 1°) with respect to the horizontal line L□.

Ichiriki, the first display device 16ai? Each magnetic roll 143. .

The rollers 143 and 143 are each configured to be able to be rotated and displaced to a state where the rotation angle is about 30'', and along with this rotational displacement, the phenomenon rollers 131.

131, developer magnetic brush 1351 on the surface.

135, it is now possible to take all the shapes and remove them. Then, the first phenomenon device 16a is completed and the second phenomenon device 1 is completed.
6b magnetic roll 143□.

143, magnetic roll drive means 160°, 16, which will be described later.
(1, when Eri is switched to the predetermined position, Eri is switched to the first position.
The phenomenon roller 131 of either the current container 16m or the second current container J6b. .

Developer magnetic brush 135° only on the surface of 1312, J
35. The shape is released L L U.

That is, when operating the first display device 16a1411, the first display device 16ag,
Magnetism a hx a s, tla$iM (currently 111
1aiM) 1471 is located in the same state as the phenomenon position 1361VC, that is, in the opening J 4 Ja,
and magnetic pole portion 145. Doctor 1 is located approximately between 1461 and 1461.
At the same time as 37□ is positioned.

Magnetic roll 143 on the second magnetic device 16b side! The magnetic pole part (magnetic pole for phenomenon > 147. is the opening 141a, ↓ recasing 1
41! The magnetic pole portion 145. 1378. And the 1st current unit equipment 1
6a side M[The agent Fa air brush 1358 is designed to be deformed only on the surface of the roller 1311〇Also.

When operating the second phenomenon unit 16blIII, the eighth
As shown in the figure, the magnetic roll 143 on the side of the Neko Genkei 16a
．． Rotate about 30 degrees and 8 degrees clockwise from the position shown in Fig. 8 to face the magnetic pole part 1451'9t doctor 1371, and position the magnetic pole part 147□ on the opening 141a1 Eli casing 141□F3 side. , Ka2 Gentaiki 16b
glI magnetic roll 143! The magnetic pole part 142 is rotated approximately 30 degrees counterclockwise from the position shown in FIG.

Katsuia Kagoribe 145. Dr. 137. Set it to the state where it is located. and.

I! 2 Current Phenomenon Gb Side Phenomenon A-La 131 Magnetic Blur of Developer Only on the Surface of Layer 135. is starting to form.

In addition, 6H air 43. , 143g magnetic pole part 145+m145*' is opposed to doctor 137K, 137t made of non-social material, phenomenon roller 1.1
11. On the surface of 1317, there is a magnetic brush l 351
The reason why s 1352 is not formed is that the magnetic pole part 14
At 51.14 J, the density of the magnetic brush is weak in adsorbing the thinning developer G, aG, which is in the state of a sludge, and therefore the doctor 137, . 137. This is because the sleeve 144. ．． Even if the rotation angle is 144°, the current 1 agent G1#G1 remains in the doctor 137□, 137.
Avoid passing through the section.

Next, the developer is applied to the surface of the phenomenon roller 13x (131) - air brush J35. (135□) 1 magnetic roll 14s, (x4s,) to form or remove
Magnetic roll drive means 160K (16
0,) IIFHl in Figures 10 to 12 (aHb
This will be explained with reference to J.

The shaft 16 of the above air roll 1431 (J 43.)
One end of 1□ (ze J, ) is pivotally supported via a bearing 163 attached to a frame 162, and a lever 164 is attached to the tip. The tip of this lever 164 is engaged with a retainer @161 of an arm 166 rotatably attached via a support shaft 165.

Further, a support portion 168 formed at the lower portion of the pivot end side of the arm 166 is connected to a plunger 170 of a solenoid 169, and one end of the tension spring 112 is connected to a support portion 171 formed at the upper portion of the pivot end side. ing.

Therefore, when the solenoid 169 is off, the arm 166 is moved by the biasing force of the tension spring 172.
The position indicated by the two-dot chain line in Figure 1.

In other words, the magnetic pole part 145° (
1451) to Doctor JJ7. The lever 164 is held in a position facing (xsv,).

Therefore, when the solenoid 169 is off, the phenomenon roller 131. (131yi) On the surface of the developer magnetic brush x
ss, (xss,) is prevented from being formed. In addition, when the solenoid 169 is in the ON state, the arm 166 resists the biasing force of the tension spring 122 and moves to the position shown by the solid line in FIG. 11, that is, as shown in FIG. 145 Tomi)? doctor 137
．． (Jj7.) The A-xe 42 is placed in a position between the Ic pair and rotated. Therefore, when the solenoid 1690 is on, the phenomenon roller xsB (xsl
, ) has a magnetic brush 1351 (135
, ) is formed.

In addition, @8 figure 1! 9 figure 155. is the hopper 151 of the second current gap vessel 16b! This is a toner residual detection device that detects when the amount of toner T within the container has fallen below a predetermined value, and includes a detection lever 1 that rotates and displaces according to the amount of toner T.
A permanent magnet 15 attached to an actuator 157 integrated with 56
8 is configured to operate when it is close to a reed switch 159 as a detector provided outside the hopper 151. In addition, the toner remaining amount detection device 155 is also used for the hopper 151H of the first gap container 16m (not shown). Toner careless detection with a similar structure! IL is provided.

Further, 180 is a permanent magnet that groove-bottoms the conveying magnetic force line breaking means 181 disposed near the doctor 1371 of the first demolition device 16H, and when the first phenomenon roller 1311 is not in operation, the first magnetic pole portion 1451 and The bottom of the groove destroys the transporting magnetic line of force between the magnetic pole part 1461 of @2 and enhances the removal effect 4 of the developer magnetic brush 1351 from the sleeve 144□.

Next, the current @1 work of the current @ device 16 will be explained. First, when one color is selected, the magnetic roll 1431.143. 8, the sleeve 144 of the curtain roller 1311 rotates clockwise in the state shown in FIG.
Celsius 51. Then, the electrostatic potential previously formed on the photosensitive drum 13 is developed with the color developer G1. In this way, the phenomenon for the electrostatic layer rIIvc ends.

The magnetic roll 143□ is rotated by about 30' and the magnetic winding part 1
45 asks the doctor 1321, and the new rotation of the developer magnetic brush 1351 onto the sleeve 1641 is stopped, and in this state, the sleeve 144□ is further rotated by a predetermined amount, and the developer magnetic brush 135 is stopped. Weight is removed. In addition.

At this time, the current magnetic brush 135 □ is not at the same temperature as the @2 current roller 131 and either of the primary phenomenon devices J
Even if 6 a # 16 b is selected, problems such as color mixing are likely to occur. In addition, #f and 2 current failure unit 16 b are selected to prevent a black phenomenon.
In the case of 1L order, the magnetic roll 143. .

143 becomes the state shown in FIG. 9, and the sleeve 144 of the second actual roller 1312. is rotated clockwise in the state shown in FIG. Then, the electrostatic latent @ on the photosensitive drum 13 was polished to black in the same manner as described above.

Sleeve 144! From the surface of the magnetic brush 135!
The current (2) operation ends with f removed.

Next, the groove bottom of the transporting magnetic force line breaking means 181 placed near the Doku p I J 71 of the *Jika 1 existing irrigation system 16m will be explained with reference to Figs. 13 to 15.

First, the permanent magnet 1 that forms the groove bottom of the conveying magnetic force line breaking means 181
80 is as thin as about 1 mm, as shown in FIG. 13, and its magnetic lines of force run across the thickness, as shown in FIG. Also.

The strength of the magnetic force of this permanent magnet 180 is
45. ．． 146. ．． It is set at 500 gax compared to 14g 1,149,0400 gax. In addition,
At this time, the bridge section 1471 for the current house is set to 100 (lf'7).

Then, the L sea urchin permanent magnet 18 shown in Fig. 8 and @Fig.
0 N pole roller 13. Actual location 136m and Doctor 13
71 and horizontally to the phenomenon 516m.

Therefore, by arranging the permanent magnet 180 as the transporting magnetic field line breaking means 181 in this way, the first current] - the non-forming of the developing agent magnetic brush 135□ to the roller 1311. During the retracting operation, that is, the first 6!1 pole part 1451 of the machine shown in Figure @15 is connected to the doctor 137.
#14
4. When trying to remove the current irrigation magnetic brush 1351t above.

Second magnetic pole part 146. The lines of magnetic force are between the S pole of the permanent magnet 180 and the N bridge of the permanent magnet 180, and the carrier magnetic line of force a between the second magnetic pole part 1461 and the first magnetic pole part 1451 is destroyed.

Note that during the current operation, the lines of magnetic force of the permanent magnet 180 and the second
Since the lines of magnetic force of the 1a bridge part 1461 are perpendicular to each other, the influence of the permanent magnet 180 on the magnetic pole part 1461 of @2 is weak, and the second magnetic part 1461 is in the 106th nhTB.
145 t (!:) will not destroy the transporting magnetic force lines a and impair the transporting operation of the current agent G1.

In this process, when the developer magnetic brush 1351'i is removed, the S pole of the second magnetic bridge part 1461 and the permanent magnet 18
A magnetic force Iib is formed between the NM of 0 and @2 magnetic bridge part 1
46. The conveying magnetic force line a between
Since the developer GK is destroyed, even if the fluidity of the developer GK or the magnetization characteristics of the carrier C3 change, the developer G
1 is not taken out, and the developer magnetic brush Gsk on the sleeve 1441 can be reduced to almost zero.

For this reason, when the phenomenon occurs in the second acid generator 16b, the amount doubled by the @1 oxygen generator 16b is eliminated, and a gap of high quality can be obtained.
That will happen.

Also, as shown in Figure 16, the current roller 131 of $1
The gap d1 between the sleeve 1441 of the photoreceptor drum I3 and the sleeve 144 of the second phenomenon a-ra 131 is
The gap d between I and the photosensitive drum 13 is also set to be large (ds>dt).

Also, the first current @a-ra131. The sleeve 1441 has a smooth surface 144Xa with a roughness of about 3 μm, and the developer magnetic brush 1 on the sleeve 144°
35. - Designed for easy removal. Also,
Second current III roller 131. Sleeve 144! teeth,
Its surface J44. Roughness of a is 10-20 for sandblasting, wire brushing, knurling, etc.
The developer magnetic brush 13 is processed to have a rough surface of 0 μm.
By increasing the conveying force of 5t, the developer magnetic brush 135 □ which is cooled by the first phenomenon roller 1311 can also obtain a highly erect state.

Note that the developer G used in the first developer 16aic and the carrier C1 therein are spherical, and the #c2 developer 1e; bv
Developer G for cV! Carrier Cm k 1st Gentakaki 1
The material used for 6a is also less spherical or has an irregular shape.

Therefore, the sleeve 144 of the first phenomenon roller 1311
The surface 144□a' of □ is smoothed to make the sleeve 1-4.
Since the developer magnetic brush 135 above can be removed in a convenient manner, leakage of the electrostatic latent image due to contact of the developer magnetic plaque 1351 with the surface of the photoreceptor drum 13 can be prevented.

Seriously, the first current obstacle 16 aiC! phenomenon occurs during operation.

Even if the developer magnetic plaque 135° of the second developing device 16b is not removed reliably and the developer G remains on the sleeve 1441, the second developing device 16b and the photoreceptor drum 13 gap d between.

Since the width is set wide, the surface of the photoreceptor drum 13 exposed by the first developer 16a is not contaminated.

While the selected developing device x6a (16b) is operating, the phenomenon bias of the other developing device 16b (16m) is cut, and the developer & of the developing device 16b (16a) which is not used is
This is to prevent the surface potential from decreasing due to the brush 135° (135,) touching the photosensitive drum 13 for some reason.

In other words, in Fig. 17(a), (indicated by bl),
The first display roller 1311 is connected to a bias voltage 192 through a first contact 190, and the second phenomenon roller 131 is connected to a bias voltage 192 through a second Wc point 191.

Also. The 11th) point 190 and the second contact 19 are:
Magnetic CI-/14 motion means 160, (160,)v
The magnetic roll J (J, (143
, ) has a groove bottom that can be switched in conjunction with the rotational movement of the grooves.

In other words, @18 drawings @ 19 drawings, 5a
ficyl 1431 (Z J s,) o axis J 61
At the other end of 1 (161 snow) is a lever 20 which is made of a 4-electroelectric material and is electrically connected to the magnetic roll x4s1 (x4s,).
0 is sorbed.

This lever 200 has a magnetic field of 0-k143° (J 4 j
, ) is the magnetic a-le, and the driving means 1601 (Jeo,
) to be driven by Eli.

Installation a A state in which the locking protrusion 200a protrudingly provided in the open position is in contact with the stopper part 201a of the stopper part fl (201 @l (the state shown in FIG. 18)) or the second stopper part 20
1b and is in the 9th state (the 19th state), the two parts are displaced into one body.

Furthermore, a power supply terminal 204 made of a conductive leaf spring connected to the bias electric power EE192 via the bias terminal 202 and the work cord 203 is disposed in the movement path of the power supply part 5oob of the lever 200. The power supply terminal 204 and the power supply portion 200b of the lever 200 constitute the contact 190 (191)t.

The power supply terminal 204 is fixed to the phenomenon device frame 2os.

Therefore, the locking protrusion 200a is shown in Fig. 18 & C.
is the fifth stopper part 201avc of the stopper part 201
In the state of contact (when the current powder magnetic brush is valve type 1iSE), the contact 191 (192)-1) is in the open state,
In addition, the IC second stopper part 201 shown in Figure @19
When rc is in contact with b (when cutting the current magnetic brush), the contacts 191C192) are in a closed state.

Then, as shown in FIG. 17(a), the second current control device 1
6b is selected and the developer fifl air is applied to the surface of @2 consideration roller 131°. ``45.'' is formed, the first contact 190 is open and the second contact 191 is closed, and the phenomenon bias is applied only to the second current 1fl Cr-ra 131!. ing.

In addition, as shown in FIG. 17 (bl), when the @l present lI! device 16m is selected and the present acid agent magnetic brush 135. is formed on the surface of the first present roller 131°, it is in the n-th state. ,
The @l contact 190 is closed, the second contact 191 is open, and the phenomenon bias is applied only to the first current roller 131.

In this work, R selected current @ device 16 a (J6b)
is operating, the phenomenon bias of the other current strainer 16b (16m) is cut, and the phenomenon bias of the other current strainer 16b (16m) is cut.
) is configured to prevent the surface potential from decreasing due to contact with the photosensitive drum 13 for some reason.

Also, @20 Figure 21 Figure VC Hosu Uni.

The toner concentration detector 44 of the Ka2 Gen I device 16a is.

Currently, the agent agitator is 140! A question is asked about the center part in the longitudinal direction.

In addition, the detection ifi 2111 of the head portion 211 is provided in a vertical state.

The head portion 112 of the toner concentration detector 44 has @2
As shown in Figure 2, a coil 21 generates a magnetic field inside.
2,212 is built-in, and the surface t of the detection surface 112a
- The permeability of the present @ I'll G that changes by 1 depending on the mixing ratio of the carrier C, which is a magnetic material, and the toner T, which is a non-magnetic material (change in magnetic permeability → change in the coil's permeability) Changes in the magnetic field created → changes in the inductance of the coil, and the current
It is designed to detect the concentration of toner T in agent G.

Compared to the conventional probe, in which -1 toner T1 is attached to the probe, a source is irradiated onto it, and the reflected light is used to detect the density of the toner inside, a separate drive mechanism is not required. Installation of the toner concentration detection device requires less space, and there is no need for regular maintenance due to dirt on the detection section due to toner scattering.
Moreover, it is not affected by changes in the environment.

It is designed to perform stable toner concentration detection.

Note that the toner concentration ejector 43 of the first current irrigation device 16m also has a similar configuration. As shown in FIG. Gxk is designed to be scraped up from below.

Then, for example, the number of copies around Nakayaria CI is t-
As the toner T melts as it overlaps (swint toner)
, the meteor of the developer G changes, and the multiplication table of the developer G at the location of the toner concentration detector 44 deteriorates, or the scraper 139 . Even if the developing device changes somewhat due to accumulation of toner on the surface, the entire detection surface 211a of the toner concentration detector 44 is always filled with the developing agent G.

In this state, stable toner concentration can be achieved.

Furthermore, the sensitivity of the toner a degree 4m output device 4 is determined by the detection surface 211a of the toner concentration detector 44 and the developer stirring body 140. Although the gap between the
, l] to ensure stable detection operation.

Note that the developer G2 is the developer agitator 140! Since the developer G is scraped up in a corrective manner, the multiplication table of the developer G on the detector 44 is not affected by the double writing of the developer G, and the control is maintained even for slight IT changes. There is no way that the a-ru will go out of order.

Also, see Figure 25! 5', cash roller 131,
From the developer G* 1e, the scraper 139 is formed in a dogleg shape, 1...n, the #4 wrinkle agent Gmk is separated from the slope part 139, and this L slope is steep. The solvent separated by 0. Second inclined portion 1:t9! that leads to the developer stirring body 140! The state is the opposite of b.

Further, the second inclined portion 1392b has a subsequent biting position located above the horizontal line a passing through the center of the developer stirring body 140R and below a line having an angle θ (θヰ45) with respect to the horizontal line a. The second inclined portion 1392b and the developer agitator 1
40. A 7-shaped space is formed between the second inclined portion 139zb and the casing, and the gap H between the second inclined portion 139zb and the casing is regulated.

Therefore, the first slope N139. aVCL developing roller 1
31. The developer G8 separated from the second inclined portion 739. bvc developer agitator 140
! The developer G8 separated from the developing roller 131 is smoothly guided to the developer accommodating portion 138 without staying on the scraper 139□. Also.

By forming a space, the used developer G,
The agitation time between the supplied toner T and the toner T can be extended, and the gap Hi can be controlled. It is possible to prevent the total loss of toner T, which occurs due to the derivation of Ic.
rxru.

Also, scraper 139! is not limited to the dogleg shape, @2
As shown by the two-dot chain line in Fig. 5, a flat scraper 139
．． ' has the same effect.

Also, as shown in FIG. 25, there is a gap between the current display roller 131 and the scraper 1393.

A gap C of about 5 mm is formed, and the developer magnetic blur 7135. C) Among them, the outer developer G8t-scraper 1□39. which contributes to the current @. The developer agitator 140 separated at The remaining developer G that does not contribute to the current @!
The unseparated magnetic brush 13B,' as the phenomenon roller 131
It is designed to be rotated while remaining on the surface of m.

In this way, the current @0-ra131. Unseparated magnetic brush 135. "i If you actively leave the unseparated magnetic brushes 13B, ', as they rotate, they will become magnetized and the developer storage section 13 will be magnetized.
Current brewing agent G from 8 thoughts! ′ attraction force (force in the direction indicated by arrow A) increases.

The supply of the present compound G- to the present compound roller 131 is done evenly.

Therefore, it is clear that 131. Because the developer G is supplied evenly.

It is possible to reliably prevent uneven phenomena caused by uneven supply of ji1@ agent.

In addition, the @2 current display device 16bV'C is soog as standard.
Developer G2 is stored, but Toner T and Ushiyaria C! The ratio is 1 layer ratio) Su-: #Y1J7=
The ratio is 4:100.

Further, the carrier C3 has a conventional particle size of 74 μm to 1 μm.
At 50 μm, one surface is not a coarse crystal, but a fine surface crystal with a particle size of 44 μm or less.
Less than % O.

Moreover, as a ferrite carrier with a small particle size having a peak of 44 to 10,575 m, Ctt is used.

Note that Figure @26 is due to the difference in particle size of -IP Yaria C2. This is a book that shows the relationship between the number of copies and changes in each type, and it is a small-sized Muyaria C! It can be seen that the image @a degree and the charge t are stable by using the product.

In addition, when the proportion of the micro carrier C (having a particle size of 44 μm or less) is increased, the absolute value of the charge amount of the carrier C8 becomes too large, which reduces the density of one image and shortens the life.

In addition, if the proportion of carrier c8 with a grain size of 44 μm or less is increased, it is not preferable because it will cause black spots if the photoreceptor drum 13 is scratched, but if the proportion is less than 10%, No black spots were observed even after 40,000 copies were made.

The table also shows that the proportion of fine surface crystals with a particle size of 44 μm or less is 10 fi amount% or less, and 44 to 105 μm.
When using the ferrite carrier C2 having a small particle size with a peak of
It has the effect of providing high-density image quality, and it also has the standard image storage capacity 11,500 in the second active unit unit 16b.
9, the storage amount of developer G is about 300g (30
It has been confirmed that even if the current @purple is performed with the amount reduced (about %), there is no change at all and a good phenomenon occurs.

In addition, the @l current wrinkle device 16a is also Carrier C, which was used in the second current unit device 16b! Similar results were obtained by using the same carrier C1.

Furthermore, Figure 27 shows the relationship between the number of copies per copy and the change in fog based on the star of the toner particle size. Toner Tt (T yo) kl! ! It can be seen that the fogging is reduced slightly by using it.

Therefore, this small particle diameter toner T1 (T,) is used.

The proportion of the above-mentioned fine surface crystals with a particle size of 44 μm or less is 10% or less, and 44 to 105 μm
The above-mentioned ferrite carbide IJ with a small particle size where m is a peak TIc
By using it in addition to 7C, (C,), even more stability of the designed density can be obtained.

The reason is that the toner Ts (Tz) is charged.

Microscopically, one particle of toner 'rt ('r*) is reduced by friction with one crystal on the surface of carrier C□ (C). Therefore, -# Yaria Cs (C
If the surface of m) is fine and uniform, the carrier Cs
(0-fold) to toner Tl (Tm) is smaller than that of carriers with normal surface crystals, the charge of toner TI (T,) is 1, which has normal surface crystals and 9 carriers. The amount of charge is more uniform and the absolute value of the charge is smaller than when using . This small particle size carrier C
5 (03) vc small particle size toner T+ (Tyi) k1N
! This is because the amount of charge will be larger than when using normal particle size toner.

Smearing and fogging of characters can be prevented, and since the amount of charge is uniform, the image @ (Ik darkness is stabilized vc.5
It was confirmed that there was no change at all and a good phenomenon occurred even if the present @7 rows were performed with the storage 1 of the current agent G2 reduced by about 300.9 (about 30%) compared to 00g. .

Note that the same results were obtained for the first current device 16m by using the same carrier C8 as the carrier C used for the second current device 16b.

〔Effect of the invention〕

As explained above, the present invention provides a two-component cleaning agent consisting of a toner and a carrier, in which the proportion of fine surface crystals and particle diameters of 44 μm or less is 1% by weight or less, and A small particle size carrier with a peak of 44 to 105 μm is used, and a toner with a small particle size of 11 μm
The following small particle size toner was used. therefore,
Long life, less toner scattering, no bleeding or fogging of single characters, and high stability of single stroke r*art.

Highly dense image quality can be obtained, and the amount of #l developer stored is slightly reduced compared to the amount of developer stored in the developer.
It is possible to provide a developer that exhibits good development without any change even if it is carried out in the above manner.

[Brief explanation of drawings]

@1rIA is a perspective view of the appearance of a uniformity forming device to which an embodiment of the developing device using the developer of the present invention is applied, @2 is a schematic longitudinal sectional front view, and 3 is a view from the rear side of the internal rock. Fig. 4 is a diagram showing the open state of the upper unit = □ 1: @5 is an explanatory diagram schematically showing the power transmission system, Fig. 6 is a plan view of the operation panel, @Figure 7 is a schematic illustration of the exhaust system 1°, ・rk near the stationary device, Figures 8 to 25 show the current rIl device, and Figures 8 and 9 are its illustrations. Mkyr, flR new front view, I! Figure 1 is a plan view showing a partial cross-section of the magnetic roll drive means, Figures 4 and 11 are side views of the magnetic roll drive means, Figure 2 is an explanatory diagram showing the operating state of the magnetic roll drive means, and Figure 13. 14 is a perspective view of a magnet used in the transporting magnetic field line breaking means, and FIG.
An explanatory diagram illustrating the direction of the lines of magnetic force of a magnet that is not shown in the figure. Fig. 15 is an explanatory diagram showing the operating state of the conveyance magnetic field line breaking means.
- An explanatory diagram showing the state of gap formation in RA, @17 figure is the current @0-
Explanatory diagram illustrating the current bias application state for La, 18
The figure is a front view of the phenomenon bias on/off means, FIG. 19 is an explanatory diagram showing the same state of operation, FIG. 20 is a schematic longitudinal sectional front view of the @2 developer, and FIG. 21 is a schematic cross-sectional plan view. Ditch 2
Figure 2 is the perspective view of the toner concentration detector, Figure 23 is the installation state of the toner concentration detector with seven side ports, and Figure 24 is an explanatory diagram of the relationship between toner concentration and detector output. is the shape of the frame V-pa and the gap formation shape M for the developing roller
t-hosu explanation decoy, Figure 26 shows the difference in carrier particle size l/c
Congratulations on changing the relationship between the number of copies and changes in various items 1!1
Figures 11W and 27 are explanatory diagrams illustrating the relationship between the number of copies and fog changes due to differences in toner particle size. Gs # Gl...Developer, C1# C@...
Nakayaria. T1#T1...Toner. , ' ・ Applicant's agent Patent attorney Shikihiko Suzue Figure 1 i io Figure 12 (a) (b) Figure 15 441a Figure 17 Figure 18 Figure 19 Figure 20 Figure 22 Door; Figure 25 Figure 26 Figure 26 Gogoichi Mosquiba↑Ko) Figure 27 Gogoichisai (Sheet (↑Thursday)

Claims (3)

[Claims] (1) In a two-component developer consisting of a toner and a carrier, the proportion of the carrier that is a fine surface crystal and has a particle size of 44 μm or less is 10% by weight or less, and
A developer characterized in that a small particle diameter carrier having a peak of 4 to 105 μm is used, and a small particle diameter toner of 11 μm or less is used as a toner. (2) The small particle size carrier is nickel, zinc, barium,
The developer according to claim 1, characterized in that it is made of any manganese-based ferrite carrier. (3) The developer according to claim 1, wherein the mixing ratio of toner and carrier is a weight ratio of toner:carrier=4:100.