JPS5857160A - Developing device - Google Patents

Abstract

PURPOSE:To make it unnecessary to provide a spacer roller and prevent the collision due to the attraction of a magnetic force for removal of a sleeve from a developing device box, by securing a prescribed space between the sleeve and a drum as a latent image holding member. CONSTITUTION:Insulating resin rings 1a and 1a consisting of a polyethylene resin or the like are press-fitted to end parts of a developing sleeve 1 and are allowed to function as spacers which secure a prescribed space dc between a photosensitive drum D and the developing sleeve 1. That is, spacer rings 1a and 1a are press-fitted to both end parts of the developing sleeve 1 so that the differential height dc is generated between both end parts and the center part. The peripheral speed of spacer rings 1a and 1a coincides with that of the drum D, and the developing sleeve 1 and the drum D are coupled with each other by biting of gears G1 and GD, and thus, a danger of the wear of rings 1a and 1a or the drum due to the slip between the developing sleeve 1 and the drum D is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device that converts latent images such as electrostatic images, potential images, and magnetic images into III images.

Conventionally, as a dry development method for developing electrostatic charge patterns, etc.
Based on the composition of the developer, it can be classified into two component gLS method and one component 3.
111 (a method). In the former, the developer consists of a mixture of carrier particles such as iron powder or glass beads and toner particles that actually form an electrostatic image. In this two-component II method, the developer consists of a mixture of carrier particles such as iron powder or glass beads and toner particles that actually form an electrostatic image. liig by changing the mixing ratio with toner particles
It has the disadvantage of a decrease in image quality due to fluctuations in IA concentration and deterioration of medium particles.

On the other hand, the latter one-component development method does not have the disadvantages of the above-mentioned two-component development method because there are no carrier particles, and 'IAg
This method has high future potential as a II method. Generally known and used one-component developers have magnetic properties within the toner particles due to frictional electrification caused by relative movement and the need for a means to transport the developer to the development area facing the electrostatic image. This includes powder.

However, the content of the magnetic powder is determined by the following steps: Before fixing the toner image on the transfer paper, the toner is bonded to the transfer paper using heat or pressure. Naturally, it becomes limited. In practical use, magnetic powder is 10% of toner particles.
However, due to the difference in the ratio between the resin and the magnetic powder, the volume occupancy of the magnetic powder in the toner particles is about 20% or less.9. Since the volume occupancy rate i of the magnetic powder V in the toner is very small, the behavior of the toner in the magnetic field is different from that of the magnetic powder alone, and it becomes difficult to form a long brush with sparse density at the magnetic pole position. For this reason, when the thickness of a single layer of toner on a toner support member is regulated to a number of t, the single layer of toner on the support member tends to become uneven and uneven.

This non-uniformity of the toner layer on the support member is easily reproduced directly in the IA law image, and since it is a dense toner layer, if buffing occurs in the layer thickness, the surface of the photoconductor, which is the electrostatic image holding member, will be affected. There is a risk that the toner may aggregate due to pressure contact and cause damage to the photoconductor.

Therefore, in this sense, in a developing method using a one-component magnetic toner, it is necessary to form a uniform thin layer of toner on a toner support member.

As a method for forming this uniform toner thin layer, Hondoshin previously published Japanese Patent Application No. 53-92108 (Japanese Unexamined Patent Publication No. 55-151).
673 Publication) was proposed and mourned.

To explain the outline of this developing device with reference to FIG. 1, N-8 magnetic poles N1, 81@N2, S2, N3,
A sleeve 100t-1 (toner support member) made of non-magnetic stainless steel or the like is fitted onto the magnet roll 101 magnetized with a sleeve 100t-1, and the sleeve 100t-1 is fixed and rotated around it in the clockwise direction shown in the figure. let A good magnetic blade 1 is installed facing the cut pole Nl.
02 cooperates with the magnetic force of the cut pole N1 to form the sleeve 1000.
As it rotates, the front plate (not shown, 9-6 stay 104, toner fall prevention stay 105) applies the insulating magnetic toner T in the developer container box to an appropriate thickness on the sleeve 100. dl is Magnetic blade 102 and sleeve 100
The gap is t. The toner applied to the sleeve X0Othi is transferred to the sleeve 10 at the position of the developing pole 81.
0 and the gap dl between the photosensitive drum D is transferred to obtain a visible image corresponding to the electrostatic image.

At this time, the thickness of the toner applied to the sleeve 100 is 50 to 1
00/J, the gap in the am section is t d 2ri330 ti or less than 100#.

Next, the sleeve 100 continues to rotate, and the distance between the sleeve 100 and the toner drop prevention stay 105 gradually narrows until it becomes the narrowest at the lower part of the trowel, and thereafter maintains that distance. This interval makes it easy for toner that was not used for development (residual toner) to enter d3. -1.3 to 2 wa is appropriate. On the way, where it gets extremely narrow, d4 is the upper part of the road.
This function serves to prevent the toner from falling in the X direction when replenishing the toner (especially from above when there is no toner inside at the time of first use). In addition
In-sleeve magnet roll 101 corresponding to this d4
It is better to provide the magnetic pole S2 at the zero surface position. This is because the applied toner brush stands up in the magnetic pole S2v part.
The synergistic effect prevents toner that falls from above from leaking.
For the above-mentioned use, the distance d4 is narrow 8131, but in reality, it is appropriate to set it at a distance of about 0.7 to 1.3 an, which allows the toner not used for development to easily pass through.

The toner on the L sleeve 100 passing through the above-mentioned barrier 114d4 is scraped off by a cleaner 106 made of a spring material such as phosphor bronze or stainless steel. Scraped toner T#
It passes through the hole 106a of the cleaner 106 in the iY direction. This force is due to the magnetic force of the magnetic pole N3 and the pushing force of the nine toners that are successively scraped off from below.

N2 is a transport pole provided at an intermediate position between magnetic poles S1 and 82 of the magnet roll 101, and an intermediate position between 53ij magnetic poles N3 and N1. Nine wires 108 are attached to the shaft 107.
rotates counterclockwise to agitate the toner T in the developing container.

The above 8I image value position is the photosensitive drum D and sleeve 1001.
- At the 3Jl image area (the part facing the drum and the sleeve 1000), apply toner with a brush in the same direction and at approximately the same circumferential speed, to be more precise, the sleeve circumferential speed is about 2 to 3 seconds slower than the drum circumferential speed. The sum of the moving speed of the tip and the increased speed due to rolling of the brush ears is made equal to the drum speed, and the toner on the sleeve is electrostatically attracted to the latent image potential on the drum.

For such a configuration, as shown in Figure @2, the sleeve 100
A sleeve gear os&FM is installed on the same axis as this gear GS.
The V-photosensitive drum D is engaged with the coaxial upper drum gear GD, and the photosensitive drum D and the sleeve 1000 rotation speed WL are related to each other as described above.

To give an example of a specific number, is the drum diameter 160% double wheat? 160Jx Reeve diameter 32.4%, sleeve gear 33t
It is m.

In this Mt & device, the applied toner brush formed on the surface of the sleeve 100 does not come into contact with the photosensitive drum, and the toner T is electrostatically applied to the potential of the latent image on the photosensitive drum D.
It is pulled and moves within the distance d2.

Therefore, the rotational speed of the photosensitive drum D and the moving speed of the applied toner on the sleeve 100 must be made to completely match in the same direction, and must be configured so that there is no uneven rotation. Otherwise, the toner will move by the distance d2. During this time, the image becomes distorted. Therefore, the configuration in which the drum gear GD and the sleeve gear GS are meshed with each other as described above is the best because it can completely prevent uneven rotation.

Even with the 3J imager configured as described above, if the process speed is high, for example, at 330 ml/sec 4 degrees, the gap distance d1 between the toner application part and the sleeve 100 is
If the toner thickness is not about 0.1, the toner thickness will be 50~xooj1
When applying 11 times, it may become somewhat unstable. In cases where the interval between the toner passage areas is restricted or the interval is relatively small, relatively large substances such as dust or aggregated toner may get stuck in that area.

If this phenomenon continues to occur, subsequent toner application may become unstable, and toner may not be applied to the circumferential surface of the sleeve corresponding to the stuck area.If you perform development with such a sleeve, uneven development or white spots may occur. This is undesirable because it causes problems.

The present invention solves the above-mentioned problems with this type of developing device, as well as other problems such as a bearing part such as a rotating sleeve, a driving structure part, a sealing means for preventing toner leakage and scattering, and a required T.
! The present invention relates to the assembly of the spacer 1, the device mounting means, the bias application means, etc.

In order to solve at least four or more problems and obtain a comprehensively excellent Nine-Fly Imaging System F11, we have added at least one new mechanical or methodological device to each part of the device. The aim is to provide 7 things that will make people feel better.

Illustrated below! (1) Overall schematic configuration of the device (mainly Figures 3-4 and 5) This device applies toner to the developing sleeve as a developer holding member, similar to the first FiA Oka device. nibuv-)'1
It was configured so that it was not carried out with the 02 but with a coat sleeve.

That is, in Figures 3 and 4, 1 and 2 are the developing devices - the 6
A freely rotating bearing j O・1 is installed between the back side plate 5 and front side plate 6 of the box.
The developing sleeves are a pair of parallel developer holding members arranged at 0.0, 11.11, and a coating sleeve for transferring the developer and toner to the sleeves.

Both the developing sleeve 1 and the coating sleeve 2Fi are made of a non-magnetic material such as stainless steel, and have magnet rolls 3 and 4 inserted therein as magnetic field generating members. Both of the magnet rolls 3 and 4 do not rotate, and the sleeves 1 and 2 are rotated around the rolls in a clockwise direction as shown in Figure 1X3.

On the surface of the built-in magnet roll 3 of the developing sleeve 1, there are four magnetic poles Sm (coating, etc.) along the circumference as shown in Figure 13.
, Na (transport pole), 5b (IA6 pole), Nb (transport pole)
is magnetized.

On the surface of the magnet roll 4 in the coat sleeve 2, there are also eight magnetic poles Nc*Sc at approximately cape intervals along the circumference.
e Nd s 8d * Ne @ Ss e Nf
*8f is magnetized. The magnetic pole Nc serves as a cut pole and faces a non-magnetic blade 12 as a developer layer thickness regulating member, which will be described later. The magnetic pole Nd is located closest to the sleeves 1 and 2 as a puto pole. The other magnetic pole is the transport pole.

Coat sleeve side magnet roll 4 puto pole Nd
-magnetic pole Sm of the developing sleeve side magnet roll 2
The poles Sm are almost facing each other, but not directly facing each other, and the pole Sm is positioned offset from the upper fILI4I with respect to the rotational direction of the developing sleeve 1v.

Current 1 device aSri includes the rear and front plates 5 and 6 that bear the sleeves 1 and 2, a concave lower stayer serving as the bottom plate, an upper stayer i that holds the non-magnetic plate 12, and the upper stayer. 8e) It consists of a part of the upper surface cover 9 which extends from the upper surface part to the upper surface part of the sleeve l, and these 4! The r component members are connected to each other with screws 13, etc., and assembled into a single container box. 5wJ shows a perspective view of the assembled container box. The top cover part @9 is attached after the necessary parts are assembled into the container box.

A ti opening 8a is formed on the upper surface of the upper stay 80.

The front side is bent diagonally downward, and a non-magnetic blade 12 made of aluminum or the like is attached by screwing 121 to the bent portion 8b. -Ro8ari top cover S
The opening 81 is always open when the upper cover is removed, and maintenance inside the device can be performed using the opening 81.

The toner T is placed in approximately the left half of the lower stayer, the upper stay 8, and the non-magnetic blade 12. The six box spaces surrounded by the substantially left half circumferential surface of the coat sleeve 2 and the side plates 5 and 6 are accommodated as toner storage parts w.

Reference numeral 61 (Figs. 4 and 5) denotes a toner sequential supply chamber for replenishing the toner storage section in one box, which is integrally formed protruding from the outer case side of the front plate 6, and is connected to the wall W6 at the end of this supply chamber. 3J(a
A toner delivery screw shaft 14 is freely rotatably disposed between bearings 15-15 between the rear side plates 5 of the apparatus. However, the screw portion 141 is not formed over the entire length VC of the shaft 14, but is formed only on the shaft portion inside 1i161.

And chamber 70 61t) The top opening 811 (Figure 15) is connected to the mouth of a container containing replenishment toner, or to a container connecting pipe or a used toner return pipe that returns from the copying machine cleaner section. But WJK is omitted and circled.

Then, both the developing sleeve 1 and the coating sleeve 2 are moved to #! by the drive mechanism described below (section (6)). When the coating sleeve 2v is rotated in the direction of the hour hand indicated by the arrow in FIG. A thin layer of toner is applied to the surface of the zelkova sleeve 1 by the coat sleeve 2 at the closest portion opposite to the current sleeve 1.

The surface of the developing sleeve covered with a super layer of toner is the photosensitive drum D,! :O rotates to the same position and adheres to the drum DII by selectively jizzing/pinging the latent image pattern on the drum surface, thereby making the latent image visible.

With the subsequent rotation of sleeve 1, the toner on developing sleeve 1 that is not used for the iA image returns to the part facing coat sleeve 2, and the toner on coat sleeve 2 is appropriately mixed with new toner in a layer, or The toner layer is scraped off and a fresh thin layer of toner is applied uniformly to each part of the surface of the developing sleeve again, and the cycle of the toner W layer being rotated again to the developing section is repeated. drum DWi
Continuous 311 meeting of latent image.

The gap size between the coat sleeve 2 and the non-magnetic plate 12 is da, the gap size between the coat sleeve 2 and the developer strip IJ-Pl is the closest to each other, and db is the gap between the image sleeve 1 and the photosensitive drum D. If the clearance dimension at the approach part is dc, for example, damO, 8m? I.

db m 1.0 am, coated magnetic pole Nd = 1000 Gauss.

With the same setting of Sm -800 Gauss, a single layer of toner with a thickness of about 0.9 mm is applied to the surface of the puto sleeve 2, and a thin uniform layer of toner with a thickness of about 60 μm is applied to the surface of the developing sleeve 1. dc is 0.1~α3I! It is set to about I11.

Although it gradually decreases as the toner Tri in the toner storage section is consumed, toner is sequentially sent out from the edge supply chamber 61 side as the toner sending screw shaft 140 rotates and is replenished.

If the boot sleeve 2 is used to form a thin toner layer on the developing sleeve 1 as in the above example, then
Compared to the case where the process is carried out directly by the blade 102 as in the case of 1 device, even if the above-mentioned writing interval dimensions da and db of each part are set large, the process speed is high to form a thin and uniform toner layer on the surface of the developing sleeve 1. Both types can be formed stably and well at all times, and the problems of poor toner application due to dust and agglomerated toner getting stuck due to the gap between the clamps, as in conventional devices, are reduced.

(2) Structure to prevent toner from scattering outside the cylinder due to the rotational drive of the sleeve 2 (Figure 3) A large portion of the toner applied to the surface of the sleeve 1-2 is caused by the centrifugal force caused by the rotational drive. Some separation and toner scattering is observed. In this case, image scraping occurs at step 8. On the side of step 1, the coated toner layer is formed by the transfer of toner having sufficient triboelectricity from coat sleeve 2, so even if the sleeve is rotated a considerable number of times (i.e., the process Coat Sleeve 211 (even when used in a multifunction machine with a fairly high speed) has little toner separation and scattering due to the rotational centrifugal force of the sleeve, but coat sleeve 211
In this case, the coated toner layer is thick, brush-like, and has no large amount of trim, so toner separation and scattering is likely to occur.

Therefore, in order to prevent the separated toner from scattering outside the powder box in the device of this example, the top cover is partially shaved 9 to cover the tops of the coat sleeve 2 and the developing sleeve 1. The leading edge of No. 9 was made to extend sufficiently to a point close to the drum D.

The scattered toner generated around the coat sleeve 2 rides on the rotating wind caused by the rotation of the coat sleeves 2 and 3A image sleeve 1, and is transferred to the back surface of the upper cover member 9 and the sleeve 2.
l Through the space passage on the side of the upper surface, the chain line arrow 111/, i-
In order to prevent the above-mentioned 9.
In the middle of the space passage, a plate-shaped fin (baffle plate) 16 that divides the space passage into left and right sides with the facing part of the coat sleeve 2 and the developing sleeve 1 as a bald boundary is installed on the back side of the upper cover part wing 9. The mounting was carried out in a supported manner, with the lower side extending close to the opposing portions of the coat sleeve 2 and the developing sleeve I.

That is, due to the presence of the above-mentioned fin 716, which is an obstructing member, a ridge is formed around the coat sleeve 2, and the well-dispersed toner wind riding on the sleeve rotation wind is obstructed by the fin 16 surface on the way, and is weakened or disturbed. The rounded and scattered toner is collected on the fin surface, and leakage and scattering to the outside of the rabbet cylinder is almost prevented. Fin 16r! It is also possible to have the F side close to either the sleeve 1 or 2, or to provide a plurality of fins along the above-mentioned space passage.・We also attempted a design that created a space passage between the V and the V, but the scattered toner wind riding on the rotational wind of the sleeve passed through the narrow space passage relatively easily, causing leakage and scattering of the outside of the box. Fin 1 has the effect of preventing toner leakage and scattering.
Setting 6 is stupider than setting 9.

In addition, the scattered toner carried by the rotating wind of the sleeve tends to be drawn out of the cartridge through the gap between the end surfaces of both ends of the Fi developing sleeve 10 and the inner surfaces of the side plates 5 and 6 of the cylinder.

Therefore, in the device of this example, the back side of the face cover member 9 is made of a rounded shape that closes the gap and prevents the toner from scattering outside the powder box from the gap. Insert a downwardly directed elongated piece (elongated fin) 17 into the gap in the radial direction of the end surface of the developing sleeve at a position corresponding to the gap between the end faces of the developing sleeve and the other sides of the container box 1 [5 and 6]. A slender cushioning sealing material 18 such as maltbrene is adhered to and supported by the elongated piece 17 to close the gap without interfering with the rotation of the sleeve 1. The maltbren etc. 18 that is the seal drama above is M! It would be better to insert a circular shadow line larger than the end face of the developing sleeve 1 instead of a strip piece, but since it is a little troublesome to assemble the developing sleeve 1 while pushing it into the 6 box, it is difficult to assemble the developing sleeve 1 in the example device. As shown above, those in the form of elongated strips are installed as shown above.

With the above-described treatment structure, toner scattering outside the powder box due to the rotational drive of the sleeve hardly occurs, and can be applied to extremely high-speed copying machines.

(3) Bearing part of the sleeve 20 (Figures 4 and 8) Bearings 10 at both ends of the developing sleeve l and the goat sleeve 2
10, 11 @ 1iri If toner enters the inside of the bearing, the rotational performance of the bearing will be reduced due to condensation of the toner, and the driving of the sleeves 1 and 2 will be impaired. In particular, ball bearings are susceptible to toner intrusion.

Even if the inner side of the developing device on the bearing is blocked with an oil seal, in this type of home-based device, the sleeve l will leak during operation.
Since the gradient of toner on the circumferential surface and toner in the toner storage section toward the end of the sleeve is quite strong, there is a phenomenon in which toner passes through the oil seal and enters the bearing over a long period of time. Be looked at.

Therefore, the device of this embodiment is designed to strictly prevent toner from entering the bearing and to maintain the rotational force tjL of the sleeve stably for a long period of time.

First, the lj image sleeve 1 and the internal magnet roll 3 are unitized as follows. That is, at 8, the rear end opening of the image sleeve l forms a relatively long solid shaft 191 at the center of the outer surface, and a bearing 19 is formed in the recess at the center of the inner surface.
The end plate (flange disk) 19 into which the flange 2 is fitted and held is folded and joined together to close the flange. The magnet roll 3 is integrally connected to a central shaft 20, and the protruding length of the rear end 201 of the shaft 20 is short and the protruding length of the near end 202 is relatively long. Then, the magnet roll 3 is inserted through the front end opening of the developing sleeve 1, and the back shaft portion 201 of the magnet roll 3g) is fitted and held in the bearing 192 at the center of the inner surface of the back end plate 19 of the developing sleeve l. Next, the end plate 21 with a relatively long cylinder shaft 211t formed in the center of the outer surface and the bearing 212 fitted and held in the recess in the center of the inner surface is inserted into the cylinder shaft 211 and the magnet roll 3 is placed inside the cylinder shaft 211. Insert the near side shaft 202.

In addition, the base of the shaft is connected to a bearing 212 at the center of the inner surface of the end plate 21.
The IA (a sleeve 1) is fitted into the front opening of the sleeve 1 and connected together. That is, the i magnet roll 3
Inside the ri developing sleeve l, there are end plates 19 and 21 on the back side and front side.
The developing sleeve 1 is built in a bearing 1 with the shafts 201 and 202 at both ends of the magnet roll 30 as the center.
92, 212, and the end plates 19, 21 are used to freely rotate the structure, and the whole unit is formed into a unit.

The coat sleeve 2 also has the same structure as described above, and is integrated into one unit with the internal magnet roll 4.

That is, 22 is the back end plate of the coat sleeve 2.

Reference numeral 221 denotes a solid shaft at the outside-center portion of the end plate, 222 a nine bearing fitted into and held in a recess at the center of the inner surface, and 23 a central axis of the magnet roll 4, which is integral with this shaft. 231 and 232 are protrusions on both ends of the roll of the wire shaft;
Reference numeral 24 indicates a front end plate, 241 indicates an oWi axis at the center of the outer surface of the end plate, and 242 indicates a bearing that is fitted and held in a recessed portion at the center of the inner surface.

The following describes the above-mentioned developing sleeve l and magnet meal 3 when used with a developing sleeve unit (Q-z2?/
), and when it is referred to as a coat sleeve unit, it also means an assembled structure as a unit for the above-mentioned coat sleeve 2 and magnet roll 4.

The developing sleeve unit has protruding shafts 191 and 2 on both ends thereof.
11 are rotatably supported between the rear side plate 5 and the front side plate 6 of the powder box of the developing device through bearings 1G-10, respectively. Similarly, the protruding shafts 221 and 241 at both ends of the coat sleeve unit are rotatably mounted in the support 11 between the back side plate 5 and front side plate 6 of the IA equipment container box via bearings 11 and 11, respectively. In order to strictly prevent toner from penetrating into the body over a long period of time, the following bearing structure is used.

That is, each of the bearings 10-10, 11, and 11 is inserted and held in a resin-made cylindrical casing, and an oil seal 112 is installed in the opening of the inner side of the developing scissor holding box of each of the casings. Make it into a form in which it is inlaid. Then, the bearing and oil seal built-in reducing cage 111 are held on the back side plate 5 and front side plate 6 of the developing storage container box, and the internal bearings 10, 11, 11 are attached to both ends of the developing sleeve unit. The shafts 191 and 211 bear the shafts 22'1 and 241 on both ends of the coat sleeve unit, and F
A shaft 1 is attached to the outer surface of each end 1 and second end plate 19, 21, 22, 24 of the Ae sleeve unit and coat sleeve unit.
91, 211, 221, 241 and concentric circular enclosure j111
193, 213, 223, and 243 are formed, and the inner end side of the bearing casing 111 with a built-in bearing and oil seal is inserted into each annular recess.

In other words, if the bearing configuration is as described above, each bearing 10 and II
Q, 11 @ 11 is due to the presence of the cylindrical casing 111 and the oil seal 112 [direct toner smearing is prevented, and the inside of the developing device container box of each cylindrical casing 111 is connected to the developing sleeve unit and the coat sleeve unit. Because the toner Q has a structure in which it enters the annular grooves 193, 213-223, and 243 formed on the outer surfaces of the respective side end plates 19, λ1.22, and 24, it is possible to prevent the toner Q from going around to the inner end surface side of the casing 111. Even if there is rotation, the amount is small and the toner acting pressure on the oil seal 112 is small. Therefore, the phenomenon in which toner passes through the oil seal and enters the casing and acts on the bearings 1O, 1O, 111, and 11 is eliminated, and the・The problem of toner intrusion into the parts 10, 11, and 11 is strictly prevented over a long period of time. Furthermore, the recessed structure of the bearing portion has the effect of making the entire recessed agglomeration image device compact.

On the other hand, the toner T in the toner storage section is applied to the gap between the back end plate 22 of the coat sleeve unit and the back side plate 5 of the box, and the gap between the front end plate 24 and the front side plate 6 of the box. The toner protrudes through the toner to the developing sleeve unit side, and the toner scatters, or is caught by the developing sleeve 1 or coat sleeve 2, causing the thickness of the toner on the sleeve l to become uneven or mottled. In this device, a disc-shaped seal *425 made of maltbrene shoe/wood is inserted into the gap to close the gap. In this case coat sleeve 2
In order to prevent the sealing materials 25, 25 from being worn out due to sliding between the back end plate 22, front end plate 24 and the sealing materials 25, 25 during 0-rotation driving, the ends of the cool materials 25, 25 are Board 22
・Between the 24 sides, a polyethylene resin 9 polyacetate resin ridge low friction thrust seam) 251-251 is placed as a lining.

By interposing the sealing materials 25, 25 in this manner, the above-mentioned toner protrusion and related troubles are prevented, and the bearing casings 111 at both ends of the coat sleeve unit are prevented from being covered with toner.
The trouble of toner intrusion into the bearing 11@11 is more effectively prevented.

iA statue x! J-tsu unit and Hikoto three leaf any,
Generally speaking, when assembling it into the developer box, it is best to fit it completely, but it is better to have a structure that allows it to be inserted and removed freely for installation and maintenance.

Figure 9 shows the configuration of the conventional removable and removable assembly.
a)) and the front plate 6 (same as (b)) are formed with through holes 1, b11/, b/ for the two fittings (bearing members of the II sleeve unit and coat sleeve unit!), and further deep. Regarding the side plate 5, a part of the edge of the plate 5 is cut out to form a slit hole C that leads to the hole.

A slit hole d is formed which interconnects the holes 1 and b.

The width dimensions of slit holes C and d are as follows: V-axis on the back side of the developing sleeve unit and coat sleeve unit
221 can pass through.

Therefore, using the current G1 package assembled using the 94 temporary 5-6 as shown in the rear panel, first insert the front shaft *241 of the coat sleeve unit into the through hole b of the front side plate 6 of the six boxes.
'vc Insert from the inside of the cover plate and protrude outward from the side plate, then align the back shaft part 221 with the slit hole C at the edge of the container box center side plate 5, and make the slit hole C→through hole a. →
Pass through the communication slit through hole d and position it in the through hole.

The externally fitted bearing members are protruded from the through holes b and h' to the outside of the side plates 5 and 6, respectively, and fitted onto the shaft portions 221 and 241 at both ends of the nine-coat sleeve unit, respectively.
It fits into the through hole hub' to prevent it from coming out. This allows the coat sleeve unit to be attached to the back and front side plates 5 of the container.
・It can be assembled freely through bearings between 6 and 6 to form a shape.

Next, remove the front shaft portion 2 of the developing sleeve unit.
11 is inserted into the through hole a/ of the front side plate 6 of the base box from the inside of the side plate so that it protrudes to the outer surface side of the side plate, and then the back side shaft part 191 is made to correspond to the slit through hole C of the back side wi5 of the machine box and the passage C is made. is placed in through hole a. And transparent heat a
Bearing members are fitted onto both end shaft portions 191 and 211 of the i-image sleeve unit protruding from / to the outside of the side plate 5e6, respectively,
The outer fitting bearing parts are fitted into the through holes a and 1' of the side plates 5 and 6, respectively, to prevent them from coming off. As a result, the developing sleeve unit is freely rotatably assembled between the rear and front side plates 5 and 6 of the six boxes via the bearing member.

After assembling the above-mentioned sleeve units, the connecting slit d connecting the through holes 1 and b in the back side plate 5, and the slit through hole C of the through hole C, should be closed by installing a blind plate. The first assembly and removal of the nine-sleeve unit are performed in the reverse order to the above.

However, the above assembly has the following problems.

1. On the back side plate 5, as shown in Fig. 9(a), slit through hole C, through hole a, connecting slit through hole, d,
There is a problem in terms of strength because a series of through holes form a deep cut. In particular, when the coat sleeve unit and the gL irrigation sleeve unit are installed, the weight of both units and the magnetic attraction force of the built-in magnet rolls of both units cause the deep cut c - a.
-d -b The A side part and the lower part of the back side plate 5 are slightly opened around the through hole, and as a result, both sleeve units can be assembled at the predetermined clearance interval d of the rain unit.
b doesn't come out well.

- Shosho to close the connecting slit hole d and slit hole C,
Simply tightening the blind plate with one screw will not seal it completely, and the toner inside the container will leak between the blind plate and the side plate 5.
Since it leaks from the small gap between
Requires further ingenuity.

Also, if it is peeled off, as shown in FIG. 9(C), the through holes 1 and b of the back side plate 5 are not communicated through the communication slit hole d as shown in FIG. Unlike the form shown in Fig. 9(a), the reduction in the strength of the plate 50 is reduced by using the form provided in the slit hole for inside the dormitory, and the assembly of both sleeve units is made easier at the time. It is easy to obtain a predetermined clearance interval db, but the rear side plate 5
There are details in the method of mutual attachment of the and lower stayer, and in the procedure for closing the book through the slit hole drilled at the bottom.

Therefore, this fi@wax has been devised to prevent the above-mentioned problems from occurring when the developing sleeve enit and coat sleeve unit 3 are incorporated into the imaging device barrel. This will be explained with reference to Figures 5-8. That is, as shown in FIG. 6(a), each rear side bearing part of the RIM image bearing unit 17-7' unit and the coat sleeve unit (in this example, the bearings 10 and 11 and the oil seal 112) is Insert and point to im type cage/g 111, J-J lower bearing part @11
Form two through holes 51 and 5b into which the holes (denoted as 1) are fitted,
Also, a part of the edge of the plate 5 is cut out to form a slit hole 5c communicating with the hole 5. The through hole 5b does not have a communicating slit hole d+ with the through hole 1 as in No. 9813(a), nor a slit through hole d' as in FIG. 9813(C), but is an isolated through hole.

As shown in FIG. 6(h), the front plate 6 has a through hole 6a into which the front bearing member 111 of the developing sleeve unit fits, and a hole 6a with a medium or larger diameter than the outer diameter of the sleeve 2 of the coat sleeve unit. A through hole 6b is formed.

For the six developing device boxes (FIG. 5) that have been drilled as described above and are assembled using nine side plates, first the above-mentioned hole 5b is placed around the inside straight hole 5b of the back side plate 5 of the container. Attach the disc-shaped cushioning seal @ 25 and the thrust sheet 251 described in section (3) in advance.Next, as for the coat sleeve unit, as shown in Figure 7, the front end of the coat sleeve unit is attached to the front side plate of the base box. The real side shaft portion 221 of the coated sleeve unit is inserted from the inside of the large diameter through hole 6bVc# of 6 and protrudes to the outer surface of the wrinkled side plate 6 by an appropriate length.
is located inside the barrel, and then its details 2211! By positioning the coat sleeve unit in the through hole 5b of the box center 1f5 and pulling the coat sleeve unit toward the back side plate 5 until the measured end plate 19 is flush with the thrust sheet 251 surface, the back side shaft portion 221 of the coat sleeve unit is moved. Make the back side plate 50 protrude from the through hole 5b (to) off-axis (llI8bil
Then, the bearing member 111 is fitted onto the detail 221,
The externally fitting bearing member 111 is fitted into the through hole 5b of the back side plate 5. On the other hand, the near side shaft portion 241 of the coat sleeve unit is located at a portion protruding outward from the large diameter through hole 6b of the front plate 6.
In this case, the circular bearing member 111t is fitted into the center of the disc-shaped cover plate 62 that fits into the large-diameter through hole 6b. Lid plate 62E)
A disc-shaped cushion, a rubber sealing material 25, and a thrust seam 251v bonding material were previously applied to the inner surface. Then, the bearing part 1f4111 is fitted and the loss plate 62
The large diameter through hole 6bK of the front plate 60 is aligned. The through hole 5bk of the back side plate 5 is inserted into the round bearing part @1!1 and the large diameter through hole 6bkf11 of the front side plate 6 is inserted, and the cover plate 62 is prevented from coming out by appropriate means. As a result, the coat sleeve unit is assembled to be freely rotatable between the back and front side plates 5 and 6 of the six boxes via the bearings 11 and 111.

Next, remove the front shaft portion 2 of the developing sleeve unit.
11 into the through hole 6m of the front side plate 6 of the container box from the inside of the # side plate so that it protrudes to the outside of the plate (Fig. It passes through the slit hole 5C and is positioned in the hole 5a corresponding to the slit hole 5C. Both end shaft portions 191 of the developing sleeve unit protrude from the through holes 5a and 6a to the outside of the 1111 plates 5 and 6.
・Fit the bearing parts @111-111 onto the outer parts of the bearing members 111 and 111, respectively, and then take measures to prevent the externally fitted bearing members 111 and 111 from coming out by inserting them into the through holes 5a and 6a of the side plates 5 and 6, respectively.

As a result, the IA image sleeve unit 6 box is freely rotatably assembled between the rear and front side plates 5 and 6 via the bearings 10 and 10.

In other words, the 4Hv imager has a configuration similar to the above GV, in which the developing sleeve unit and coat sleeve unit are incorporated into the 6 developing device boxes! ! Since the side plate strength is maintained sufficiently, it is easy to obtain the specified clearance interval dbft between the two sleeve units, and the interval is maintained stably over a long period of time.1 Assembly and removal are the opposite of the above assembly. This procedure is easy, and the reproducibility of the mutual positional relationship of both sleeve units during reassembly is also good. There are advantages such as no toner leakage, and all of the above-mentioned problems are solved.

The effect of preventing toner leakage is explained in detail in Fig. 9(a).
In the side plate 5 having the configuration shown in FIGS. 1 and 2C, it is very common to close the slit-shaped openings d+d' to prevent toner leakage, but the round opening 6b is closed by the round lid plate 62. In that case, if you set aside 2 to 3% of the animal housing length, toner t'L will not occur, and the coat sleeve and end plate 22 of the unit.
・G4 of Shimamoto example prevents toner from spilling into the fJ4 image sleeve unit side from the space between 24 and the bad news side plates 5 and 6.
When it comes to imaging devices, I love that! 2! However, in the side plate configuration shown in FIG. .6I are the back and front end plates 22 and 24 of the coat sleeve unit 2.
Since the length of the diagonal line of , that is, the length of Ll shown in FIG. 8 is not required, the space that must be filled with the seal@moltpre/25 becomes large.

In addition, the coat sleeve unit must be set with the Malt Pret folded, and if you repeatedly pull out and insert the coat sleeve unit, the Malt Blen 25
The thrust sheet 251 is likely to peel off and be damaged.

In the method of setting the coat sleeve unit as shown in FIGS. 7 and 8, it is not necessary to shrink the malt pre/25 and then set it, and the assembly is easy.

(5) Attaching the screw shaft 0 blade, etc. vIIR (Figures 3 and 4) After assembling the developing sleeve unit and coat sleeve unit to the developing device container box as described in the previous section, attach this to the screw shaft 14 for toner delivery. It is rotatably supported by bearings 15 and assembled into the container box. Further, the non-magnetic blade 12 and the rake member 2626 are fastened together with the screws 121, 121 to maintain their attachment to the diagonally downward bent portion 8b of the upper stay. In this case, the blade 12 is positioned and screwed so that a predetermined distance d1 is formed between its lower side and the coat sleeve 2. The scooping members 26 are disposed so that their tip edges are lightly shaken or close to both end surfaces of the coat sleeve 20, and are used to scrape off toner with a toner scraping plate.This will be explained in a separate section ((7) JJ). . .

After assembling the new parts into one holder as described above, six boxes of top covers 8@9 are installed with the plate-shaped fin 16%-long sealing material 18 described in section (2) above on the arc side. Put it over the top and screw it onto the upper stay 8.

Also, regarding the developing sleeve unit #i box center @ shaft portion 191 protruding outward from the plate 5! Il! Bearings 2 are attached to the cylindrical shaft 211 protruding toward the 6 directions of the box front side plate and the front side plate 6, respectively.
The spacer rollers 27 and 27 are rotatably mounted and supported via the spacer rollers 71 and 271. This spacer: 1027-27
contacts both ends of the photosensitive drum to maintain the gap dc between the image sleeve 1 and the ram D at a predetermined value at all times.

In addition, in the case of required J/V/G development such as a single developing device, the spacer roller is 27.
Since 27 also rotates once, the bearings 271 and 27 on the inner circumference of Pu4
The spacer rollers 27 and 27, which are not required, may be press-fitted into the shaft portion 191-211 of the developing sleeve unit and integrated with the shaft.

The material of the spacer rollers 27 is preferably soft resin, such as polyethylene, so as not to damage the photosensitive drum D.

(6) Current drive machine for iron sleeves, etc. (No. 4.10 to 1)
Figure 3) It is best to leave the developing sleeve 1, etc. closed except when necessary. However, as shown in Figure 1-2, the sleeve gear GS
In the configuration in which the drum D is engaged with the drum gear GD and driven, the three 7'100 also rotates at all times while the drum D is rotating. For this reason, single-component toner with a small tribo is likely to fall off and scatter on the sleeve surface, increasing the amount of toner scattered into the machine.

In a copying machine that automatically controls the potential by measuring the electrically charged line of drum D on the east side, when measuring the potential of the dark black, toner adheres to that area and the consumed toner is scattered, saving resources. It is also unfavorable from this point of view.

Therefore, the ij4 imager of this example turns on/off the rotational drive of the i-image sleeve, etc. of the iA imager in response to a signal from the copying machine control system.
It has a configuration that allows it to be turned off.

That is, the magnet rollers @20 and 23 of the developing sleeve unit and the coat sleeve unit have the tips of the protruding shafts 202 and 2320 on the hand cup side connected to the shafts 211 and 2320 of the front end plates 21 and 24 of each unit, respectively, as shown in Figure 4. 241 is made to protrude outward (C) from the tip, and a part of the circumferential surface of the outwardly protruding shaft portion is machined into flat surfaces 203 and 233.

Then, a bearing/glue 2 is attached to the lower end of each processed shaft.
Fit the bearing rings 281 and 291 of the support plates 28 and 29 onto which 81 and 291 are caulked, and tighten the bearing/g Q push screw 2.
82 and 292, and press the lower end of the push screw against the machined flat surface 203 and 233 of the shaft, respectively.
02-233 and bearing rings 281 and 291, that is, support plate 28
・29 are integrally connected, and the upper ends of each support plate 28 and 29 are attached to the top cover part 1I of the VC111 box as shown in Figure 1110.
A series of downwardly bent pieces 91 are formed on the front edge of 49.
- Securely fasten to 91 with screws 283 and 293.

Therefore, the magnet roller shafts 20 and 23 of the developing sleeve unit and the puto sleeve unit, that is, the magnet rollers 3 and 4 are held fixed (non-rotating).

On the other hand, m! The J-7' unit, coat sleeve unit, and screw shaft 14 are provided with electromagnetic springs on the outwardly protruding shaft portions of the container support plate 5, respectively.

Coat sleeve gear G4. The screw shaft gear G5 is fixed.

The electromagnetic spring C/ is attached to the clutch shaft 30 and one end of the electromagnetic part 31, and the other end is press-fitted to the shaft 3.
a developing sleeve gear G loosely fitted on the shaft 30 between the electromagnetic section 31 and the transmission gear G2;
transmission gear G311 of the clutch shaft 30.
Insert the tip of the developing sleeve unit into the tip of the outwardly protruding shaft 191 on the back side plate 5 of the box, and turn the gear G with the bottle 32.
2 is integral and rotatably connected. Also, the electromagnetic part 31
It is rotated and fixed to the back side plate 5 of the container box via a plunket 33 and a set screw 34.

Developing sleeve gear G1 meshes with drum gear GD that rotationally drives drum D, transmission gear G2d idler gear G3
It is meshed with coat sleeve gear G4 through T-.

The coat sleeve gear G4 and the screw shaft gear osrt are directly engaged with each other (Figs. 11 to 13).

In the electromagnetic clutch unit CI, when the electromagnetic part 31 is energized from the control system of the copying machine, the clutch plate 311 moves in the direction of the developing sleeve gear G1 and locks the developing sleeve gear G1. It becomes an integrated state (clutch-on). On the other hand, when the power supply is cut off, the clutch plate 311 escapes from the gear 01 side, the engagement is released, and the gear G1 becomes free to rotate with respect to the clutch shaft 30 (clutch-off).

Therefore, when the clutch is off, even if the developing sleeve gear G1 is rotationally driven as the drum gear GDo rotates, the gear 01
, the clutch shaft 30 idles, no rotational force is transmitted to the shaft 30, and the gear train below gear 02 in the G5 groove does not rotate. That is, developing sleeve 2, coat sleeve 2, screw shaft 14
are not rotationally driven.

When the clutch is on, the fA image sleeve gear G1 is coupled and integrated with the clutch shaft 3 (), so the rotation of the drum gear GD causes the gear Gl, clutch shaft 30, transmission gear G2, and shaft 19 to be connected.
1 rotates together to release the sleeve l of the developing sleeve unit.
becomes rotationally driven.

The rotation direction Fi is the direction of the upper hour hand in FIG.

The rotation of the transmission gear G2 is also transmitted to the coat sleeve gear G4 via the idler gear G3, the coat sleeve unit shaft 221 is rotationally driven, and the coat sleeve 2 rotates in the same clockwise direction as the developing sleeve 1.

Also, the coat sleeve gear G4 is equipped with a screen knee shaft gear G5.
Since the screw shafts 14 are engaged with each other, the screw shaft 14 is driven to rotate counterclockwise, and toner is successively replenished from the replenishment toner supply chamber 61 to the toner storage portion of the machine box in small quantities.

Here, 41: Since the example iA image device is of the so-called jumping boundary 10,000 type, the circumferential speed of the photosensitive drum D is dc (distance between the drum D and the developing sleeve L) to the outside of the outer diameter of the developing sleeve L. He is very sensitive to his peripheral speed in the 9th section and his older brother. If you can give specific numbers, the current Suzu sleeve 1vfi diameter, 3
2.4%, drum D and developing sleeve 1 vttaF44
d c = 0.3%, Tora*DO & 160% Door A gear G D to @Number 160, am sleeve gear yG
It is lvma33. t) Rim family sleeve ° by numerical value
The apparent circumferential speed of l has a ratio of 0.98 to the circumferential speed of drum D, but this ratio becomes 1 at a distance of 0.3% from the IAm sleeve 1 (1) surface.

The circumferential speed of the coat sleeve 2 is the same as the toner thin layer (50 to 100μ) required for japing development on the six sides of the developing sleeve lv.
It is possible to supply enough toner to form the developing sleeve 1v peripheral speed v25 - 25, but the 9 parts on the developing sleeve 1 that are used for development and run out of toner,
In order to reduce the difference in the toner coverage with the remaining toner V that is not used for development, the toner on the image sleeve 3A is flicked off by the toner brush on the coat sleeve 2, that is, the action of magnetic brush development is applied. It is preferable to use a moth with a circumferential speed of about 75 mm, but if you feed it as soon as possible, you can use the same circumferential speed of 11 lJf. It is preferable to form a nearly 1% long brush on the sleeve 2 and rotate it at a slow speed so that the difference in the toner coverage can be practically ignored, since it is likely to be damaged if the brush is rotated at a high speed. The rotation speed is tripo amount %3jl
Depends on fIA sleeve circumferential speed, but approximately 50 to 10011 m
Nine degrees.

In the developing device of this example, the ratio of the i-image three-ear G1 to the transmission gear G2 is approximately 1:0.75, specifically, the ratio is set to 25 teeth to achieve the above peripheral speed.

Clutch C/ is an example of an electromagnetic spring clutch/
If the diameter of the clutch C/ is large, it may get in the way when the vehicle is in use, so an electromagnetic spring clutch with small vibration and capable of transmitting high torque is suitable.

As mentioned above, the clutch unit C/ fits the shafts 30 and 191 to the developing sleeve unit and connects the bin 3.
Assembly can be achieved by a simple method such as connecting with 2.

The above drive system configuration allows free VCC excitation/stop control of the iA spear device. Furthermore, the two sleeves 1 and 2 can be driven at a high rotational speed using an extremely simple drive system.

Ceramic, #E4-13 35ri in the figure shows a connecting pin that engages the side plate D1 of the ram A)ffGD and the ram D.

(7) Toner scooping member (#! 4, 4A figure) Regarding the coat sleeve unit +C, the peripheral surface areas L2 and L2 where the end plates 22 and 24 at both ends of the coat sleeve 2 are fitted are inside the magnet roll 4. Since this area does not hold toner (J) is small, compared to the circumferential area where the magnet roll 4 is present, the C tribo is weaker, and ultimately when developing the fA image sleeve 1 drum D. The toner behaves differently. Specifically, m of the same drum D mountain
Development is performed at 9111 degrees with respect to the image potential.

In addition, since the force to magnetically attract toner is weak, toner tends to scatter in this area as the coating sleeve 2 rotates, and the thickness of the toner transferred onto the developing sleeve 1 is thicker than in the central area. This tends to lead to various inconveniences when performing jumping development. Gaba Drum D and I
The toner may be crushed between the A image sleeves 1 or a thick layer of toner may form on the drum. Furthermore, even in the circumferential area where the magnet roll 4 is located inside, the magnetic force is strong at the end thereof, that is, the area L3 in FIG. 4 due to the nature of the magnet. Therefore, it has not been subjected to internal magnet rolls or self-drawings with varying characteristics.

When a non-magnetic material is used as the blade 12, the behavior of the toner is unlikely to be significantly different between the longitudinal center region of Goat Leaf 2 and this region L3, but when a magnetic material such as iron is used as the blade 12. A toner layer is formed in this part which is considerably thicker than in the central part.

So 1Afjlth! In order to solve the above-mentioned problems, several improvements have been made to the installation. That is, set the length L5t of the magnet roll 3 in the current sleeve l so that it is slightly longer than the largest copy paper medium LP, and then set the length L5t to be slightly longer than the largest copy paper medium LP.
) Set the view dimension L4 of the magnet roll 4 inside the coat sleeve 2 to be slightly longer. *To.

Coat sleeve 20 both ends circumferential surface area L2/2 K@Rake member that contacts or riO ~ 0.5% degree of separation and coincides with the end surface of the magnet roll 4 inside the sleeve 2 or slightly enters inside. 26.26 will be provided.

With this configuration, due to the presence of the 1m rake #426/26 on both end sides of the coat sleeve 212), no toner layer is formed or a very thin layer is formed, and the sleeve surface rIIi) moss completely matches the properties such as tribo. Since only the toner that is present is formed on the developing sleeve 1, a uniform thin layer is formed on the developing sleeve 1, and therefore, the image at the end of the jumping development is also good over the entire axis of the maximum paper medium LP. Also, since there are scoop members 26, 26, there are circumferential areas L2, L where the magnet roll 4 does not exist inside both ends of the coat sleeve 2.
There is no possibility that the toner pushed from the rear along the sleeve 2 will protrude to both ends of the sleeve 2.

Fit! In the example shown in #14, the above-mentioned toner scooping member 26.
26 and the blade 12 are constructed as separate members, and when assembling them, they are collinear with the diagonally bent portion 8b of the upper slide 8 using screws 121. The front edges of both ends of the toner scoop 12 may be formed into projecting edges, and the projecting edges may be used as the above-mentioned toner scooping members 26.

(8) Applying bias to the developing sleeve etc. (liE3
゜4.10, 12.13) It is known to superimpose a direct current to the developing sleeve l and apply a nine-current bias to improve development performance, especially gradation and image density using a one-component developer. . However, as #J image formation speed increases, unless the level of applied DC and AC and the frequency of AC are increased accordingly, bias will not be applied and the effect will not come out. Specifically, the process speed will increase. 120% left-handed DC component + 300V/AC component so o V -51EM] Wave number 200H2-1'
Appropriate! The i-image was calculated by 4, but at a process speed of 330%, a DC component of +650V, a flow component of ±100OV, and an AC frequency of 5508Z are required (VC).

However, in order to prevent leakage when such a high potential bias is applied, it is necessary to make each iron stand made of electrically insulating resin or to provide a creepage distance.

, especially the side plates 5 and 6 that constitute the six developing device boxes. It is necessary to avoid applying bias to the lower steerer.

0 is [1] If the toner in the storage area touches the wall of the 6 boxes covered with bias, the above tribo will occur.
This is because the toner may deteriorate in quality.

Further, since a high potential bias is applied to the developing sleeve 1, the electromagnetic clutch C4 must have a withstand voltage of 2000 V or else the clutch coil may suffer from poor insulation.

In addition, such a high-voltage electromagnetic clutch C/ is not normally commercially available, and has disadvantages such as being extremely expensive and large, and being difficult to manufacture that conforms to the electrical appliance standards of each building.

In view of the above, the developing device of this example has a bias application configuration modified.

That is, the back side plate 5, front side plate 6, and lower stayer of the developing device are made of insulating material such as resin, and the developing sleeve unit, coat sleeve unit, blade 12. Each component of the screw shaft 14 is kept insulated from each other. Similarly, the lower stayer may be made of a metal plate, but in that case it may be made of electrically floated or grounded cotton.

The end plate 19 on the back side of the developing sleeve unit, including the shaft portion 191, is made of an insulating material such as AB8 or PC resin, and the electromagnetic clutch unit C/C is attached to the shaft portion 191.
Clutch shafts 30 are connected and connected by a pin 32.

In the row device, the developing sleeve 1, the coating sleeve 2, and the blade 12 are used to apply Eas, and as the application means, the upper cover member 9 of the C device is made of conductive material. , the power supply terminal 36 (
Figures 12 and 13) are provided to apply Iasumi pressure (
The power supply path #4 to the terminal 36 will be explained in the next section). Then, the developing sleeve l is attached to the support plate 2 made of a conductive material through the bent piece 91 (FIG. 10) of the upper cover member 9.
8. Bearing link 128°l, shaft 202, bearing 212, end plate 21 MM (@Fig. 10, Fig. 4), and the coat sleeve 2 also has the following conductive material through the bent piece 91 of the upper cover member 9. Support plate 29, bearing ring 291,
In the path of the shaft 232, bearing 242, and end plate 24, and in the path of the -E surface cup (one member 9 and the upper stay 8 made of conductive material to which the cover member is screwed) on the non-magnetic blade 12, the same The potential) (Ias) becomes the applied state.

In this case, the voltage is applied to the 3J6 sleeve 1 (9) (because the end plate 19 to which the electromagnetic clutch unit Cl is attached is made of insulating material as described above, the clutch unit C
It does not reach the / side, and the unit CTRI is electrically maintained.

As mentioned above, by using the -E top cover as the 9 electrical circuit, for example, the presence of long cords and the hassle of wiring, which would be required if the power supply cords were stretched to each part that requires bias application, were avoided. The structure is simple and reasonable.

Since there is no bias in the developing device glaze 9, side plates 5 and 6, and lower steerer, problems such as toner tribo and deterioration of toner do not occur.

The magnetic roller shaft support plates 28 and 29 of the developing sleeve 1 and coat sleeve 2 are connected to the same blade support stay 8.
It may be configured such that a bias is applied to the sleeve l.2 and the blade 12 by coupling them together and applying a bias to the stay 8.

(9) Developing device l! Attachment to Sonki Mokuki (1st
(Fig. 115) This H device is l Copying machine 4: The photosensitive drum DrkJIZ) by the loading/unloading developing device during the loading/unloading phase into the machine.

-The developing device of the jumping developing method uses the developing sleeve l.
The gap dc between the drum D and the drum D must always be kept at a specified clearance of 30θμ±30μ4M degrees regardless of the drum DC deviation of 7L/rotation or unevenness. It is not possible to fix the drum in one position relative to the drum, so even if there is eccentric rotation or unevenness in the drum, the M* device can naturally oscillate to follow the eccentric rotation or irregularities. Always maintain a predetermined gap distance dcij between the developing sleeve l and V cabinet. ■ When removing the developing scissors from the electric circuit between the copying Hashimoto @ side and the developing device side! iI connection/disconnection is performed automatically as the developing device is operated, thereby eliminating the hassle and hassle of plugging/unplugging the electrical connector each time the image forming device is installed/unloaded, and the forgetting to plug/unplug the connector. This is with the addition of the following ideas.

First, the mounting structure of the developing device on the copying machine will be explained. In FIG. 13, the drum Dti is rotatably supported by bearings between the side plates 37 and 38 of the chassis of the 37/38 Fi copying machine. D2 indicates the drum axis.

On the front side of the chassis described above, a developing device insertion opening 381 is formed at a portion corresponding to the developing device installation position relative to the drum mount. Also, a developing device pedestal 39 (Rei 14/15
A groove rail 391 is formed along the length of the side on the front side of the drum D@ of the pedestal 39 on which the drum D@ is disposed. On the other hand, regarding the mass imager 1j, the rear rail 3 of the pedestal 39 is located near the drum D@ on the lower side of the back side plate 5 and front side plate 6 of the IS box.
91 are formed with downwardly directed protrusions 53 and 63 that fit into them.

Therefore, to install the developing device into the four copying machines, insert the developing device into the copying machine through the opening 381 of the front side plate 38 of the chassis, and insert the developing device into the main body of the copying machine first, as shown in Figure @14. Connect the downward protrusion S of the back side plate 5 of the container box to the horse mackerel rail 39 of the pedestal 39.
1 VCC adult and rc center @ downward self-protrusion 53 of plate 5
The lower side portion 54 on the opposite side is received on the pedestal 39. As a result, the developing device is inclined with respect to the drum centering around the downward protrusion 53, so that the front side of the developing device is placed at a large distance from the drum D. Then, while maintaining this posture, move the entire imaging device onto the pedestal 39 and the groove rail 391.
Make a copy by pushing it into the machine. Bowl 11I on the way! When the -F facing protrusion 63 of the front side plate 6@ of the device is positioned corresponding to the grooved rail portion 391, the protrusion 63 is connected to the rail 3.
91 and push it into the developing gR device 1. Finally, the outer surface yc of the rear side plate 5 of the 6th axis of the developing device is installed. - Insert the connector 41 into the connector 41 on the back side plate 37@, and fully insert it with the platform that is received by the stopper plate 42.

During the process of pushing and inserting the developing device, the front side of the developing device is in a nine-position state with a large distance from the photosensitive drum D as described above.・Prevents damage to the drum surface caused by rubbing with 27.

Also, 31* the device is pushed in enough so that the connection p4° is the same as 4.
1 and is received by the stopper 42, even if the IA image device is raised centering on the protrusions 53 and 63 during the insertion process of the a image device, the front edge of the upper cover member 9 of the developing device Fig. 13 Ice control - As shown in Fig. 14, the noise interferes with the developing device insertion opening edge 382 (partially protruding edge) of the chassis front plate 38 and prevents rotation, causing the same <g4m sleeve gear G1 and Spacerco Eff27 is drum D'rI
When the developing device is fully pushed in and the connector 40 is fitted into the connector 41 and is received by the stopper 42, the developing device is designed to protect the surface of the driver 40 strictly so that it does not come into contact with the connector 41. The front plate 6 of the device 6 box passes through the opening 381 of the chassis-front side wias of the copying machine to the chassis-front plate 38.
In this state, there is no interference relationship between the front edge of the upper cover part of the ti3Js device and the opening edge 382 of the chassis front side plate 38, and the groove rail engaging protrusion 53O63 of the entire developing device is located at the center. It is possible to perform a raising operation.

#114-15m, 43Fi SovjJl imager start CL
.

In the operation mechanism, 431ij is omitted in the diagram, and the shaft that rotates forward and backward according to the operation yc of the next operating lever, 433ij, that shaft 431
The U-shaped metal fitting is fixedly supported via a VC bracket 432, and 434 is an advancing and retracting rod that is slidably supported on both cape pieces of the V-shaped metal fitting, and the mosquito advancing and retracting rod is formed in the middle of the line rod. A coil spring 436 compressed between the flange 435 and the ridge of the U-shaped metal 433 is used to constantly project forward. This is a presser formed at the tip of the 437Fi promotion rod 434. Note that the above bracket 432 to suppressor 4371
The members are provided at two locations on the back side and the front side of the shaft 431.

On the other hand, the inner rear plate 5 and the front plate 6 of the developing device are formed with protrusions 55 (the front plate 6Il is not shown) corresponding to the suppressors 437 of the above-mentioned mechanisms.
When inserting the device into the copying machine, use a lever to rotate the shaft 431t in the counterclockwise direction so that the insertion developing device and the device raising mechanism 43 do not interfere with each other as shown in Figure 14. 43 Overall f: Relief shape 1 to the outside of the current device insertion path
i1vct, insert fj4 imager.

The developing device is fully inserted and the connector 40 is at 41 V.
After the CC has been adjusted and received by the stopper 42, the shaft 431Tk is rotated in the direction of the hour hand by operating the lever. Then, during the rotation process, the pusher 437 of the device raising mechanism 43 hits the corresponding protrusion 55 on the current gII device side. ! I nine. After that, when the shaft 431f is rotated against the weight resistance of the developing device and the force of the spring 436, the advancing/retracting rod 434 is moved by the spring 436t-
The lever tip 437 retreats while being compressed, and the pusher 437 sinks diagonally downward into the protrusion 55. As a result, the spring 4
360 reaction force acts on the fA image device through the protrusion 55 to push the entire developing device up against the lifting rail 391 of the pedestal 39.
The spacer rollers 27, 2 are rotated in the direction of the hour hand around the downward self-protrusions 53, 63 engaged with the
7 comes into contact with both end surfaces of the drum DO as shown in FIGS. 13 and 15, and the 3jl image sleeve gear G1 becomes engaged with the drum gear GD. The raised state of this developing device is determined by a mechanism 43 rotated around a shaft 431. Or shaft 43
The first operating lever is held by returning past the dead center or by locking the lever with a locking device.

In other words, the current glI housing has a protrusion 53-6 due to the reaction force of the spring 436v.
The spacer rollers 27, 27 are always kept in contact with the drum D, and a predetermined gap dc between the IJA image sleeve 1 and the ram D is maintained. In this case, even if the drum DK2 rotates around its center, and the drum DV has unevenness, the cushioning action of the spring 436 causes the entire developing device to maintain the contact of the rollers 27, 27 with the surface of the drum 9, and keep the rollers 27 facing downward. A predetermined clearance dcq) between the developing sleeve 1 and the drum is secured by following the protrusion 53@63.

What is the rotational force of the current S device due to the spring 435? ADK
Converted to Koro 27/27 @Kururiki F (Rei 15 figure) l
kL;J,iI! If this force F is small, the rotation of the drum D will be uneven and the ability to follow irregularities will become noticeable, and if it is large, the rollers 27 will press against the drum D strongly, causing damage to the drum.

Alternatively, the screw 435 can be compressed considerably and attached to the metal fitting 4.
33LS is closed, and the structure is such that the pressing force does not change much even if it is turned to a large angle. In other words, the free length is the metal fitting 433
v It's much worse than Ryotenkataseki g) f: It's compressed and set. This reduces the change in pressing force even when the spoon is bent, and the number of spring legs is small! 1, and can be designed in a consistent manner.

Next, the electric circuit connectors 40 and 41 will be explained (mainly shown in FIG. 12). The connector 4 on the developing device side is fixedly attached to the outer surface of the inner plate 5 of the developing device box via arm members 401, 401. The power supply terminal 36 is attached to the electromagnetic clutch CI% and held and connected to the sensor unit S (FIGS. 12 and 183) for detecting the remaining amount of toner.

In addition, the connector 41 on the copying 1m frame side has a connection 411L with the control circuit section of the machine, and a shaft 412 is connected to the rear side plate 37 of the machine chassis on the side opposite to the developing device m side in the vertical direction in the center Ib. It is attached to the freely rotatable rocking plate 413 and held. The front surface of the connector faces the inside of the rear side plate 37 through a window hole 371 cut into the rear side plate 37 of the chassis. Rocking plate 4
During the oscillation of 13, the lυ axis 412ri is inserted into the copy mode 41: 9. The center axis of oscillation of the developing device 111%, that is, the extension of the axis iI connecting the do-oriented protrusion 5° 3 and 63 fitted into the adjacent rail 391. They are arranged with their axes aligned.

, a protrusion 414 is provided at the bottom of the end of the rocking plate 4131111111 opposite to the shaft 412, and the receiver is stopped by a bent protrusion 421 of the stopper plate 42 fixed to the rear side plate 37 of the shaft 7. The weight of the rocking plate 413 with the connection P41 is supported, and a light tension spring 415 is stretched between the rocking plate 413 and the stopper plate 42 so that the rocking plate 413 is always held on the shaft 4.
The stopper plate 42 is pressed onto the protruding piece 421 of the stopper plate 42 for positioning by rotating and urging it downward around the stopper plate 42.

Therefore, the connector 41 of the swing plate 413 in the above-mentioned positioning state
As mentioned above, the still image camera 4: is inserted into the idk by pushing it into place. Connector 40 on the i-image device side
In the final process of pushing and inserting the developing device, the protruding guide pins 403 of the developing device side connector 40 are configured to face each other directly, and the protruding guide pins 403 of the developing device side connector 40 are inserted into the pier receiving hole 4 of the main unit side connector 41.
16 and 416, and with the subsequent insertion movement of the developing device, the connector 40 smoothly fits into the connector j41 to form a bonded wire, and at the same time, the connector 4o moves to the stopper 42.
This prevents further insertion of the developing device, and it is recognized that the developing device has reached the final insertion position. Therefore, as explained in Figures 14 and 15 above,
31 and the mechanism 43 raises and rotates the IAgII device clockwise around the downward protrusions 53 and 63 to bring the spacer rollers 27 and 27 into contact with the photosensitive drum D, and at the same time, the developing sleeve gear yGt is connected to the drum gear GD. By bringing them into engagement and maintaining that state, the mounting of the developing device on the main stack is completed.

In this case, since the axis connecting the pivot shaft IiI round protrusions 53 and 63 of the developing device and the axis of the pivot center shaft 412 of the pivot wJ temporary 413 that supports the connector *41 are coincident, the 3J imager Along with the above-mentioned raising and rotation, the connector 41 of the main stack @ also moves along with the swing plate 413 while maintaining connection with the connector 40 of the current 1 device side, and resists the tension spring 415 and moves around the shaft 412 without being buried. The rotation does not cause any problem in the mutual connection of the connectors J40Φ41 ("1", etc.), and as mentioned above, the developing device does not cause protrusions 53-6 due to the eccentric rotation of the drum Dv or unevenness.
3, the rocking plate 413 also follows the rocking movement, and similarly, there is no problem in connecting the connectors j40 and 41 to each other.

Note that there is some noise (#'i) between the shaft 412 and the swing plate 413.
The connector 40 on the developing device side may be configured to swing freely around the center of swing of the developing device.

Once installed, remove the developing device from shaft 4 in Figure 15.
31 in the counterclockwise direction by the V-par operation, the strainer mechanism 43 is released and rotated outward as shown in FIG. 14, thereby releasing the pushing force of the IA image device. Then, the entire developing attFi rotates in the counterclockwise direction around the downward protrusion due to its own weight, and the rear lower sides 54 and 6
4 is in contact with the top of the pedestal 39, and the entire developing device assumes a rear tilted position centering on the downward protrusions 53 and 63 as shown in FIG. 13, and spacer rollers 27 and 27 on the front side of the device
Separate from the jJI sleeve gear GL and drum gear GD.
move away from Thereafter, the developing device in the downwardly inclined position is pulled toward the front side by t in that position.

Due to this pulling, the connector 4° is automatically released from its engagement with the connector 41. By further pulling the developing device toward you, it is taken out of the machine through the opening 381 of the chassis front plate 38.

Even in the process of extracting the developing device, since the front part of the developing device is largely separated from the surface of the drum D, the surface of the drum D is not scratched and damaged by the spacer rollers 27, 27 and the gear G1. In addition, in this extraction process, if the developing device is raised and operated centering on the downward protrusion 53 @ 63, "C" is moved between the front edge of the upper cover 90 of the fJLgl device and the front side plate opening of the chassis, as in the case of the above-mentioned developing device insertion process. The rotation of the developing device is blocked due to interference with the edge 382, and the spacer rollers 27 and
27 and the contact of the gear Gl to the drum 9 surface is pasted.

Furthermore, even if the 3J unit is pulled and operated without releasing the suppression of the developing device by the mechanism 43, the pressing force of the mechanism 43 remains.

The developing device cannot be removed from the front side plate 6 of the developing device, the inner side of the opening edge 382v of the chassis front side plate 38, and VC (FIG. 13).

<10)) J 橡 sleeve unit, 22 coat sleeves, etc. cDm Chenghei (Koh 16 diagram) 4 stripes diagram example Q) For maintenance inspection in the developing device #
To remove the 4-piece sleeve unit, remove the shaft 1 on both ends.
Electromagnetic clutch C/ from 91/211.

When the spacer rollers 27-27 are removed and then one or both bearing members 111 are removed from the container @plates 5 and 6, the magnet 2 in the developing sleeve l is attracted by the magnet 4 in the coat sleeve 2. , the toner present at a distance of 1'ζ between the sleeves 1 and 2v is caught between them and aggregates. As a result, a large amount of toner may accumulate and fuse onto the sleeve.
This leads to problems such as the lump getting caught between the blade 12 and the coat sleeve 2.

An example of a structure that improves this point is shown in FIG. 16. That is, the 16th
figure? ! The ends 2a and 2a of the lri coat sleeve 2, that is, the areas L2 and L2v where no toner layer is formed, are made thicker, and the diameter R2 is made thicker.
Both ends of grade 12 are placed in contact with that part. Here, the thick diameter R2 of the end of the coat sleeve and the sleeve partial region L4 forming the toner brush! Level difference with Kl (
If the blades 2-81) are made approximately equal to the desired brush ear length tl, there is no need to remove the blade 12 for maintenance or readjust it each time it is installed. (R2-R1)'21 is generally 0.1-0,
5 rm set at 84 degrees. Also, coat sleeve 2
In order to form brush ears only in a certain area of the magnet 4 inside the developing sleeve 1 pc, the toner particles having the same properties such as tribo to form a single layer of toner. A thin layer is formed. Furthermore, the toner does not collect on the outer end surface of the step, shortening the life of the bearing and causing the toner to scatter. Even if the bearing part $4111-111 of the current iron sleeve unit is removed, both sleeves 1 and 2 will not come closer than the difference in level due to the presence of the large diameter parts 2a and 2a of the coat sleeve 20 and the presence of the following ring 1aala. It has many V* points, such as there is no need to worry about toner adhesion or clumps. Using a similar idea, if the skin of the developing sleeve 1v gets loose, an insulating resin ring la@la made of polyethylene resin or the like is press-fitted to secure a predetermined gap dCt between the photosensitive drum and the sleeve l. /c/ can also act as a spacer. That is, there is a step dc at both ends of the developing sleeve l.
Press fit the rζ spacer ring a*ta so that To give specific figures, the height difference in coat sleeve 2 is d a w
l), 8%, #L image sleeve 10 steps d c = r
Q, 3%mm. Naturally, in the configuration in which the above-mentioned spacer ring 1aala is provided on the fA image sleeve l, the spacer rollers 27 and 27r in the example of the cocoon 4 are
iBoth sides are unnecessary. Furthermore, the circumferential speeds of the spacer ring 1m51m and the drum D are completely the same, so the % developing sleeve l
Since @ and drum Dll are both connected by meshing with gear Gl@GD, a slit occurs between them and ring 1a
・There is no risk of 1a or drum being worn out.

Shiroyama makes the spacer rings la and 1a made of insulating resin, in addition to preventing the drum D from being damaged, the developing sleeve l is also made of an insulating resin to improve the developing performance, especially the gradation and imaginary density mentioned above. (Section (8)) A high potential bias may be applied, and a photoconductor (with a different thickness) is placed between the conductor such as aluminum chive 5, which is the base of the drum D, and the fA image sleeve 10. Generally speaking, the spacer rings la and 1a come into contact with each other through an angle of 50μ8! degree), which tends to cause troubles such as pinholes, so the purpose is to prevent such troubles.

Also, due to the presence of this spacer ring la@1m, when one sleeve 1 is removed from the developing device cylinder, the attraction and collision of the sleeve 1 in the direction of the sleeve 2 due to the magnetic force is caused by the protrusions 21 and 2a on the coat sleeve 2 side. It is prevented by a similar effect.

In summary, in general, when resetting the current 111 device after assembly or maintenance, the coat sleeve should be placed on the front side.

In order to form a single layer of toner with a predetermined toner thickness tl, it is necessary to install the blades at a distance of about 11 mm from each other with two coat sleeves.
t@<It is only necessary to set it by pressing it against the large diameter s21 and 28 at the end of the coat sleeve 2, and the installation is extremely easy. It should be noted that when a magnetic material is used for the blade 12, the thickness of the toner 7 layer will be thinner than the distance between the blade 12 and the bootsleaf 20, so (R2-R1)/2 is the thickness tl of one layer of the toner. Of course, it is necessary to make it significantly larger. With this structure, maintenance, etc. would be impossible if the sleeve was removed and the sleeve was crushed.

(11) Other configurations for applying bias to the developing sleeve (Figs. 17 to 21) Unlike Fig. #112, the sensor unit S for detecting the remaining amount of toner is not provided, and the bias is simply applied to the developing sleeve, etc. In the case of a rut device having a configuration where it is possible to do this, it is not necessary to provide the connector 40 as shown in FIG. A part of the rear side thereof is extended 92 to protrude, and when #current III device is inserted and mounted on the copying AI+ machine side, the upper cover member protrudes from the extension 92 above.
It is sufficient to adopt a configuration in which a power supply plate spring terminal 441 is provided in contact with the power supply plate spring terminal 441. 44ri shows a high voltage transformer (HVT) that supplies power to the temporary spring terminal 441.

In this way, the connectors 40 and 4 as shown in @12
1. The arrangement 41402/411 and the swing plate 413 are not necessary, making the 9% configuration extremely simple.

In addition, in the example shown in FIG. 12, as explained in item (8) above, the top cover member 9 is used as a power supply path to connect the magnet to the front side of the developing device. It is a good idea to apply a bias to the developing sleeve 1 and the putot sleeve 2 via the terminals 11118-2.
Sleeves 1 and 2 via the back side member of the 1WAK developing device
and nine rows are shown configured to apply a bias to the blades 12.

That is, the shafts 191 and 221 on the driving side, that is, on the back side, of the developing sleeve unit and the coat sleeve unit are connected to the developing device It instrument cylinder plate (insulating material) 5 using metal support plates 451 and 4, respectively.
Bearing support is provided via ball bearings 45 and 46 (Fig. 21) with 61. The upper ends of each of the ball bearing support plates 451 and 461 are bent downwardly into tongue pieces 93 and 9 formed at the center side of the upper cover member 9 of the device.
4 respectively with screws 452@462. The end plates (7 langes) 19 and 22 on the driving side, that is, the rear side, of the fAgII sleeve unit are made of conductive material (the electromagnetic clutch unit C/ is electrically insulated from the shaft 191). (combined).

The power supply to the upper cover member 9 employs the leaf spring terminal contact type shown in Figure 17 above.

The developing sleeve 1 includes a high voltage transformer 44 → a leaf spring terminal 441 → an upper cover member 9 → its bent tongue piece 93 →
Bearing support plate 451 → bearing 45 → shaft 191 →
In the path of the end plate 19, the coat sleeve 2 has a bent tongue piece 94 from the upper cover part @9 to the bearing support plate 46.
1→Bearing 46→Shaft 221→End plate 22 path, and on the blade 12 there is a top cover member 9→It is screwed 1
Bias of the same potential is applied through the conductive upper stay 8 of the developing device barrel.

In the above, although the ball bearings 45 and 46 are respectively used as power supply paths, there is no instability in the power supply paths because the balls are always rolling and in contact between the inner and outer rings of the bearings inside the bearings.

In this way, it is extremely effective to use the rear side power feeding method as opposed to the front side power feeding method of the next developing device as explained in section #J, ω), which is an electrical component.

It should be noted that power supply from the high voltage transformer 44 to the upper cover 11F is a little troublesome due to wiring operations, but it is necessary to connect the high voltage transformer 44 and the upper cover 1.
#9 may be connected to the WXI20 by the boolean r47, the connector 48, and the connector 49 of the high voltage transformer 44 as shown by the chain line in the figure to supply power.

In addition, pairing support metal members 451 and 4 for the developing sleeve 1 and coat sleeve 2 for the blade support 1 oil 8
61 and applying a bias to the stay 8 may be configured such that a bias is applied to the sleepers 1 and 2 and the blade 12.

(12) Claims of the present application As explained above, the device shown in the figures is made up of various improvements to each part, but the present application particularly claims (
The other constituent parts (FIG. 16) of the developing sleeve unit and coat sleeve unit explained in section 1O) are the subject matter of the claim.

That is, a sleeve 1 that supports the developer and insulating materials 1a and 1m (spacer rings) having a diameter larger than the diameter of the sleeve 1 that supports the developer are integrally provided at both ends of the sleeve as a latent image bearing member. The hand R45 that presses the insulating material 1 & 1a onto the area where a copy image is not formed on the ridge portion is characterized in that the circumferential speed of the outer diameter of the insulating material and the circumferential speed of the outer circumference of the latent image bearing member are approximately the same. 3 [The device is the gist of the invention.

With this configuration, as explained in the above section (10).

A predetermined gap "da" is ensured between the drum D, which is a latent image carrying member, and the sleeve 1, and the arrangement of spacer rollers 27, 27 as in the apparatus shown in FIG. 4 is not required. Also sleeve 1
Sleeve 2 of sleeve 1 when removed from the developing device box
Attraction collision due to magnetic force in the direction is prevented by the presence of the members 1a.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of an example of a developing device using a one-component developer, FIG. 2 is a perspective view of a developing sleeve of the device and a drum as a member to be developed, and FIG. 3 is a device according to an embodiment of the present invention. 4 is a longitudinal developed plan view taken along the line PI-mV in FIG. 6, FIG. 4A is a plan view of a modified example of the blade, FIG. 5 is a perspective view of the developing device box, and FIG. (a) is an inner view of the back side plate of the vessel, and (b) is an outside view of the front side plate.
Figure M8 is an explanatory diagram for assembling the coat sleeve unit and developing sleeve unit to the container barrel, and Figure 9 (
a) is an inner view of the back side plate of the conventional barrel, (b) is an outside view of the front side plate, 1st view (c) is an inner view of a modified example of the back side plate, and Fig. 10 is a developed image of Fig. 4. External view of the front plate side of the device, No. 11
The figure is an outward view of the rear side plate side, Figure 12 is a perspective view of the rear side plate side of the developing device and the Q electric circuit connector and stopper portion on the copying machine side, and Figure 13 is a perspective view of the image device relative to the subject machine. FIG. 14 is a plan view of the installed state, and FIG. 14 is a side view of the developing device in the lower position state before it is inserted into the main body of the copying machine and then raised and rotated. FIG. 15 is a cross-sectional side view of the developing device in a state where it has been raised and rotated so that the spacer rollers are in contact with the drum surface, FIG. 16 is a longitudinal developed plan view of a modification of the device shown in FIG. 4, and FIG.
The figure shows an example of a copying machine in which bias power is supplied to the top cover member of the developing device by contacting the spring plate terminal on the voltage transformer side with the long protrusion of the member. 18 to 21 are plan-concave views of the imaging device shown in FIG. 19 is a vertically developed plan view of the back side plate of the developing device, and FIG. 19 is an external view of the back side plate. Figure 20 shows the current ijI! FIG. 21 is a plan view of the rear side plate of the device, and a perspective view of the bearing portion. 1 is a developing sleeve, 2 is a coat sleeve, 6 and 4 are magnet rolls inside those sleeves, D is a drum, 12
is a non-magnetic blade. Nni';1＼I O figure $45 figure

Claims (1)

[Claims] (1) A sleeve that supports the 3jt developer and an insulating material having a diameter larger than the diameter of the sleeve that supports the developer are provided integrally at both ends of the sleeve, and the copied image of the 1 part of the image bearing member 111i is A construction device characterized in that: a means for pressing the insulating material onto a non-forming region; and a circumferential speed of the outer diameter of the insulating material and a circumferential speed of the outer circumference of the 1W image bearing member.