JPS61114263A - Developing device - Google Patents

Abstract

PURPOSE:To prevent a developer from being one-sided in position in a device body during transportation by slanting part of a side wall forming an upper opening part inwards, and burying a rib formed on the partial internal surface of the side wall in the developer put in the device body and pressing it. CONSTITUTION:An upper cover 172 and a side cover 173 forming the device body 15 are provided with ribs 17 ad 175, which form a support guide when a hopper 163 is installed; and a lock lever 168 is elevated when the hopper is detached to disengage a claw part 169 from the hole 170 of the device body 15, and the hopper 163 is detached, thereby facilitating the replacement. Consequently, the side cover 173 is slanted inwards around a rotating shaft 176 when the hopper 163 is detached to seal the upper opening part of the device body 15 where the hopper 163 is inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developing device used in an image device such as an electronic copying machine.

[Technical background of the invention and its problems]

Conventionally, this type of developing device has been assembled into a unit and removably installed inside the copying machine main body, but when it is installed into the copying machine main body, it is inserted from the front side or side side. Most of the methods are not only structurally difficult to insert from the top side, but also
If the device is packed or transported with developer stored inside the device at the time of shipment, the developer in the device may become uneven.
Because of this, it has a negative effect on the image, so the inside of the device must be empty before being transported.

Currently, developer is added during assembly on site.
Furthermore, there have been various problems in mounting the developer powder replenishment hopper constituting the main body of the apparatus, such as requiring many fixing means such as screws, making the mounting work troublesome.

[Purpose of the invention]

The present invention has been made under the above circumstances, and an object of the present invention is to provide a developing device that prevents the developer stored inside the device from shifting even during transportation.

[Summary of the invention]

In order to achieve the above object, the present invention has an opening in the upper part into which a developer powder replenishment hopper is inserted, and a developer containing a mixture of developer powder and a magnetic substance is stored inside the opening. The developing device is characterized in that a part of the side wall forming the opening can be tilted inward.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIGS. 1 to 27.

1 and 2 show the overall internal structure of an image forming apparatus, such as an electronic copying machine, according to the present invention, and numeral 1 in each figure indicates the main body of the copying machine. This copying machine main body 1 discharges an image support (hereinafter referred to as a transfer material), not shown, which is conveyed via a drive system 5 and a control system 6 by a feed device 4 consisting of a paper feed cassette 2 or a manual feed guide 3. As shown in FIG. 2, the upper half on the document table 8 side with the conveyance path leading to the tray 7 as the boundary can be opened and closed, and an image of a document (not shown) placed on the document table 8 can be copied. In this process, a drum-shaped image bearing member (hereinafter referred to as a photoreceptor) 10 constituting the transfer device 9 is charged by a charging charger 11 at 1,500 yen.
The original image uniformly charged to V-900V and uniformly irradiated by the exposure lamp 13 constituting the exposure device 12 is transferred to a focusing transmitter (product name: Self-Hox Lens Array).
14 to form an electrostatic latent image on the photoreceptor 10, this electrostatic latent image is visualized by a developing device 15, and the transfer charger 1 is placed on the transfer material conveyed from the feeding device 4.
6, the visible image (developer image) is further fixed by the fixing device 17, and discharged to the paper ejection tray 7. On the other hand, the developer (hereinafter referred to as "developer image") remaining on the photoreceptor 10 after the transfer is transferred to the photoreceptor 10. , toner) can be cleaned by the cleaning device 18, and can be neutralized by the static eliminator J9.

That is, as shown in detail in FIGS. 3 to 6, the feeding device 4 feeds out the transfer material P accumulated in the paper feeding cassette 2 by rotating the semicircular paper feeding roller 2. This paper feed roller 21 allows the driving force to be attached and detached by a main drive system and a spring clutch 22, and the claw portion 24a of the operator 24 of the solenoid 23 is connected to the sleeve of the spring clutch 22. The rotation of the paper feed roller 21 is stopped by being locked to the protrusion 22a, and when the claw portion 24a is detached from the protrusion 22a due to the retracting action of the operator 24 due to the excitation of the solenoid 23, the paper feed roller 21 is stopped. The roller 22 was rotated one rotation to send out the transfer material P so that it reached a pair of feed rollers consisting of a driving roller 25 and a driven roller 26, and the transfer material P was attached to the lower unit by the pair of feed rollers 25 and 26. The sheet is fed to an aligning roller pair consisting of a driving roller 27 and a driven roller 28 attached to the upper unit. At this time, the aligning roller pair 27 and 28 are in a stopped state.

By rotating again at a timing when the leading edge of the visible image on the photoconductor 10 and the leading edge of the transfer material P can match with a predetermined position, the transfer material P is conveyed through the iL section guide 29, 30 so as to come into contact with the photoconductor 10. This makes transcription possible.

Then, the transfer material P after transfer is transferred to the pair of pinching rollers 31 and 32.
The photoconductor 10 is held between the contact surfaces with the photoreceptor 10 and conveyed to the fixing device 17, which will be described later.
A peeling tape 33 whose one end is fixed to the front guide 29 and whose other end is passed between the sandwiching rollers 31 and 32 and fixed thereto.
is arranged so that the transfer material P can be forcibly peeled off from the photoreceptor 10 using this peeling tape 33. On the other hand, numeral 34 in the figure indicates the insertion port of the manual feed guide 3, and the transfer paper P inserted from this insertion port 34 is passed between the pair of manual feed rollers 35 and 36 to operate the detection switch 37. .

By pressing the copy button in this state, the drive rollers 35 of the manual feed roller pair 35 and 36 are rotated to feed the transfer material P to the aligning roller pair 27 and 28, and similar transfer is performed. At this time, the paper feed roller 21 is controlled not to rotate. Further, one lower drive roller 35 of the pair of manual feed rollers is
As shown in FIG. 4, the other upper driven roller 36 is arranged obliquely with respect to the traveling direction of the transfer material P (indicated by the solid line arrow), and is formed in a spherical shape, thereby correcting the skiing of the transfer material P. I am working as hard as I can.

7 and 8 show the drive mechanism of the document table 8. A guide plate 41 is provided at the bottom of the document table 8, and the engagement hole 4Ja formed in the guide plate 41 is inserted into the engagement hole 4Ja of the document table 8. A guide roller 43 fixed to a chain 42 that moves along the direction of movement.
The chain 42 is engaged with the gear 44, and the document table 8 is driven by the movement of the chain 42.
The gear 44 is engaged with a gear 47 which is supported by a swing lever 46 which rotates about its central axis as a fulcrum, and this gear 47 is connected to a swing lever 48. The chain 42 is moved by being removably engaged with a gear 50 which is pivotally supported at one end of the chain via a stud 49 and driven to rotate. The driving force from the drive motor 5 is applied to the gear group 52, which is pivotally supported by the rotating lever 48.
53 and 54, and the rotation lever 48 is moved by the spring 55 so that the other end side is always directed upward, that is, in the direction in which the gear 50 is disengaged from the gear 47. The other end is connected to a solenoid 57 via a connecting rod 56, and the suction action of the solenoid 57 causes the rotary lever 48 to move in the X direction (shown in FIG. 7) against the urging force of the spring 55. counterclockwise) so that the gear 50 meshes with the gear 47. At this time, the suction force of the solenoid 57 is set to be stronger than the tension of the spring 55, and the gear 50 is always lifted upward during rotation, that is, in the direction of engagement with the gear 47, by the force applied to the tooth surface of the gear 47. When the main drive is stopped by stopping the drive motor 51, the rotating lever 48 is rotated clockwise by the biasing force of the spring 55 because the rotational force that tries to lift the gear 50 disappears. However, the gear 50 can be removed from the gear 47. Further, a positioning plate 58 is attached to the chain 42, and this plate 58 operates a microswitch 59 fixed to a fixed frame (not shown), and when the microswitch 59 is pressed during the initial copy operation, the transfer The material P is fed, the chain 42 is rotated once, and then the plate 58 presses the micro switch 59, the drive motor 51 is stopped, the gears 47 and 50 are disengaged, and the document table 8 is stopped. This is how it is. In this case, the gear 42 and the gear 50 have nine guide rollers (not shown), so that the distance between their axes is kept constant when they mesh and rotate. Furthermore, this drive mechanism is such that the document table 8 is connected to the main drive system by operating the solenoid 57 once, and the previously fed transfer material is already ejected when the next sheet is fed. The transfer material conveyance path is set so that the paper has been completely transferred. Furthermore, in continuous copying, it is possible to achieve one copy per rotation of the document table by issuing a paper feed signal.

9 to 11 show the optical device 12. FIG.

For example, components such as an exposure lamp 13, a focusing transmitter 14, a static eliminator 19, and reflectors 62 and 63 are assembled on a fixed frame 61 made of a heat-resistant resin such as polybutyl terephthalate. This fixed frame 61 is
It also serves as a holding member to hold the focusing transmitter 14 vertically, and a temperature control island 6 is provided at an appropriate position.
4 is positioned and fixed. That is, the exposure device 12 focuses the light from the exposure lamp 13 using a pair of upper and lower reflectors 62 and 63 to illuminate the document placed on the document table 8, and also constitutes a static eliminator 19, which will be described later. The upper reflecting portion 66 of the static eliminating shutter 65 illuminates the document by reflecting the light L1 from the side opposite to the light source of the exposure lamp 13 against the transmission body 14, thereby creating a shadow even if the document has irregularities. It's becoming difficult. Further, in the lower reflector plate 63.

An opening 63a and a reflecting portion 63b are formed so that the light from the exposure lamp 13 can be guided directly onto the photoreceptor 10, and the direct light Lt can be used to remove static electricity before the photoreceptor 10 is charged. . Further, the exposure lamp 13 is connected to a power supply terminal 6 as shown in detail in FIGS. 10 and 11.
7, and one end of the power supply terminal 67 is fixed with a screw 68, and a screw 69 is screwed into the middle portion thereof, and by rotation of this screw 69, the power supply terminal 67 can be freely moved up and down, and is connected to the reflection plate 62.
The position of the exposure lamp 13 relative to the exposure lamp 63 can be variably adjusted.

This function balances the amount of light in the longitudinal direction of the illuminated portion of the document, making it easy to obtain a uniform and even copy image.

A static eliminator 65 constituting the static eliminator 19
opens and closes according to the movement of the document table 8.

It is closed when an electrostatic latent image is being formed on the photoreceptor 10, and is opened at other times to guide light from the exposure lamp 13 onto the photoreceptor 10 and erase excess potential on the photoreceptor 10. It is intended to reduce toner consumption, and its opening/closing mechanism has a structure as shown in FIGS. 12 and 13. That is, the static elimination shutter 65 has a light shielding member 65a on the back surface and is always urged in the closing direction by a spring 71 in conjunction with a cam mechanism that aligns the transfer material and replenishes the toner. A kicking member 72 is attached to the lower part of the table 8, and when the document table 8 moves in the input direction at the start of the copying operation, the kicking member 72 is
The actuator 73 is rotated. When the first actuator 73 is rotated in the opposite direction to the input direction of the document table 8, it is returned by the biasing force of a spring 74, and the sleeve 76 The second actuator x pressed against
Rotate -3177. One end of a spring 78 is caught in a groove (not shown) formed at one end of the sleeve 76, and the other end of the spring 78 is connected to the first cam 7.
It's hooked to 9. The sleeve 76 has a protrusion 76
a is formed, and when the second actuator 77 is caught on this protrusion 76a, rotation of the sleeve 76 is inhibited, the biasing force of the spring 78 is released, and the first cam 79
When the second actuator 77 rotates, the second actuator 77 comes off the protrusion 76a of the sleeve 76, and the sleeve 76 rotates. At this time, the drive gear When 80 rotates in the direction of arrow B, the biasing force of the spring 28 also causes the first cam 79 to rotate in the same direction.

The first cam 79 is formed with a large diameter portion 79a and a small diameter portion 79b, and the large diameter portion 79a has a rotation support shaft 81 of the second actuator 77 when the first cam 79 is stopped.
The other end of the first lever 82, one end of which is fixed, comes into contact with the
When the first cam 79 rotates, the first lever 82
rotates and stops when it comes into contact with the small diameter portion vyb, and the rotary support shaft 81 rotates by the amount of rotation of this first lever 82, thereby rotating the operating lever 83 fixed to this rotary support shaft 81. let This operating lever 83 moves the static eliminating shutter 65 in the opening direction (in the direction of transition from the solid line state to the dotted line state in FIG. 9) against the biasing force of the spring 71, while the returning force is applied to the static neutralizing shutter 65. This is due to the biasing force of the spring 71 that biases the . Further, in the figure, 84 is a second cam attached to the first cam 29 so that its adjustment position can be changed, and has a large diameter portion 84a and a small diameter portion 84b.
4a has a swing lever 8 when the first cam 79 is stopped.
When one end of the swing lever 85 is pressed against the spring 86 by the urging force of the spring 86 and the other end of the swing lever 85 is brought into contact with the protrusion 87a of the sleeve of the spring clutch 87, transmission of the driving force is prevented.

On the other hand, the swing lever 85 is rotated by the rotation of the second cam 84, and the other end is removed from the protrusion 87B of the sleeve of the spring clutch 82, and the driving force is transmitted by the biasing force of the spring 86, and the shaft 88 is rotated. The driving force is transmitted to the pair of aligning rollers 27 and 211 of the transfer material feeding device 4 shown in FIGS. 3 and 4. Further, reference numeral 89 in the figure is a spring clutch attached to a shaft 90 that transmits driving force to a toner replenishment mechanism of the developing device 15, which will be described later. When the solenoid 92 is energized and the tip of the operating rod 93 is removed from the protrusion 9, the shaft 90 of the spring clutch 89 is rotated to drive the toner replenishment mechanism.

By the way, the above-mentioned charger (charger) No. 9
As shown in the figure, a charging wire 101 and a shield 102
and the distance between the photoreceptors 10 is 71jl:9! ! ff and the inflow current ratio is 7:l, and the photoconductor 10 is charged with a surface potential of -500V to -900V. The formed electrostatic latent image is moved to a developing device 15, which will be described later, and is visualized with toner.

The photoreceptor 10 is made into a cartridge together with a charger 11 and a cleaning device 18, which will be described later.
The structure is manufactured by applying an organic photoconductor layer formed of a generation layer and a transport layer to a thickness of 17 to 23 μm on a double-cut aluminum cylinder 105 with a wall thickness of 0.8 μm, for example, The front flange 106 and the rear flange 107 are made of plastic material, and especially the rear flange 107 is made of a conductive plastic material (10 to 100 m).
For example, Polyayatal B5 manufactured by Polyplastics Co., Ltd.
-5, or gn-to), and is grounded through this rear flange 107, fulfilling the function of a photoreceptor.

The cleaning device 18 also includes a light shield plate 1 covering the upper part of the cleaning device 18.
11, and is made by cleaning the toner remaining on the photoreceptor 10 after transfer, and is made of polyurethane rubber (55°
The cleaning blade 112 and the recovery blade 113 are arranged such that the ridgeline of the cleaning blade 112 has a contact angle of 1 to 5 degrees with the tangent line of the photoreceptor 10, and its pressing The load is 0.8 to 1. The damage to the surface of the photoreceptor 10 is reduced by setting ay/u. That is, the toner remaining on the photoconductor 10 is completely scraped off by the cleaning blade 112 bonded to the first support plate 114, and this scraped toner is bonded to the second support plate 115 at the bottom. The toner is received by the cover blade 113 and is temporarily conveyed into the toner storage box 117 by the spiral-shaped conveyance auger 116 shown in the 14th factor, and the toner sprocket 118, the ladder chain 119,
Rudder sprocket 120 and toner carrying auger 121
It is designed to be introduced and housed inside the photoreceptor 10 via the photoreceptor 10.

Furthermore, the charge remaining on the photoreceptor 10 after cleaning is
As shown in FIG. 9, the static electricity is erased by light (static elimination light) Lt directly guided from the exposure device 12.
This is done by reflecting the static eliminating light guided by the reflecting part 63b and irradiating it onto the photoreceptor 10 through the light opening 111a opened in the light shield plate 111. An air outlet 111b is formed adjacent to the lighting opening 111a,
The air inside the cartridge, in which a large amount of ozone and other products are generated due to negative charging, can be efficiently discharged to the outside, and each of these components is assembled to a frame 130 that constitutes the cartridge body. This frame 130 includes a rear frame 131. Front frame 132. The rear frame 131 includes a reinforcing frame 134 having a cleaner box 133 and an exposure slit 134a. A pair of upper and lower pins 103, 103 provided on the rear side of 1 are fitted to determine 1 position.

Further, one of the pins 135 is made of a conductor that can be electrically connected to the charging wire 101 of the charging charger 1, and high voltage is applied from the main body by a conductive elastic member (not shown). Further, a pair of upper and lower positioning holes 104, 104 are formed on the front side of the charger 11, and a drum shaft flange 141 having a drum shaft 142 fitted to the front flange 106 of the photoreceptor 10 is inserted into the holes 704, 104. and a bracket 136 inserted from the outside via the front frame 132.
A pin 137 integral with the charger 1 is inserted into the charger 1.
This is done by positioning the Further, in this case, the rotational drive of the photoreceptor 10 is performed by the rear flange 10 of the photoreceptor 10.
The driving force of the augers 116 and 121 is transmitted through a cup (not shown) at the tip of the toner carrying auger 121. The toner storage box 117 is used as a handle when the cartridge main body is taken in and out of the apparatus main body 1. The cartridge can be taken in and taken out along a guide member formed inside the device main body 1 (not shown).

15 to 19 show a developing device 15 that visualizes the electrostatic latent image formed on the photoreceptor 10, and includes a magnet roller 152 rotatably supported by a support frame 151. It is composed of a doctor 153, a scraping plate 154, a stirring shaft 156 having stirring blades 155, etc. A handle 157 is rotatably attached to the support frame 151, and two handles are attached to both sides of the handle 157.
In-system pins 158 and 159 are respectively protruded at the same position. These pins 158, 159 are attached to the retaining plate 1 fixed to the top frame on the main body side as shown in FIG.
One pin 158 is inserted into the guide groove 16) of 60 to serve as a pivot point for the entire support frame 15, and the other pin 159 is inserted into the guide groove 16).
is engaged with an engagement groove 162 recessed in one side of the holding plate 160 to position the gap between the holding plate 160 and the photoreceptor 10 . The pin 159 and the back side of the support frame 151 serve as a guide when the device is inserted into the top frame of the main body.

163 in Figure 1 is a hopper for replenishing toner, and the opening on the bottom side has a replenishment roller 164 made of sponge material.
This replenishment roller 164 is fixed to a rotating shaft 165 and supplies the developer powder in the hopper 163 into the main body, and is of a plug-in type with the main body. In other words, this hopper 163 is constructed by inserting a protruding piece 166 formed on the front side end face into a hole 167 opening on the front side of the device main body 15, and locking lever 1 provided on the rear side thereof.
It is fixed by pushing the claw part 169 of 68 into a hole 170 opened on the rear side of the apparatus main body 15, while the gear 17 fixed to the rotary shaft 165 of the supply roller 164 is Toner replenishment is performed by transmitting driving force from the toner. In addition, the device main body 15
Ribs 174 and 175 are formed on the upper cover 172 and side covers 173, respectively, which form the hopper 163, and these ribs 174 and 175 form a support guide when the hopper 163 is installed, and when it is removed, By lifting the locking lever 168 upward, the claw portion 169 can be removed from the hole 170 on the apparatus main body 15 side, and the hopper 163 can be removed and replaced easily.

When the hopper 163 is removed, the side cover 173 is tilted inward around the rotating shaft 176 (the 15th
The upper opening of the device main body 15 into which the hopper 163 is inserted can be sealed (in the direction of arrow H in the figure).

By the way, the main body of the developing device 15 contains a developer which is a mixture of developer powder and a magnetic material (carrier).
By transmitting the driving force from the main body side to the gear 177, the stirring shaft 156 is rotated in the direction of arrow Y in FIG. Since the developing pole is arranged by positioning the fii type transport pole on the surface of the photoreceptor 10 using a fixed magnet, the developer adheres to the magnetic roller 152 and is moved to a predetermined position by the doctor 153. After increasing the thickness, the static latent image on the photoconductor 10 can be developed at the position of the development pole, and the developer after development advances in the direction of rotation of the sleeve of the magnet roller 152 and is scraped off. It is scraped off by the plate 154 and deposited around the stirring shaft 156 again.

Further, as shown in FIG. 19, a developer concentration detection device 178 is incorporated in the scraping plate 154, and an electrical contact 179 of this detection device 178 is made to protrude from the front frame on the front side of the device main body 15. Scraping board 154
The detecting device 178 detects developer powder and magnetic powder in the developer. A signal is output to control the developer powder concentration to a predetermined amount by detecting a change in the mixing ratio of the toner.
It has a configuration in which developer powder is replenished by rotating the
It is something.

In this way, the visible image formed on the photoreceptor 10 by the above-described developing system is transferred to the transfer material P by the transfer charger 16.
As shown in FIG. 3, the transferred material tAP is transferred onto the transfer material static eliminating member disposed continuously on the transfer charger 16 after being peeled off with the rear side release tape 33. (for example, a zerostat), and is led to the fixing device 17.

This fixing device 17 can be separated into upper and lower units as shown in FIGS. )0-ra 183 and lower unit 18
It is sent to the fixing section between the press roller 185 of No. 4,
190℃±20℃ heat and 400-1000t/o
It is designed to be fixed by a linear pressure of n.
Both the upper and lower units have a copying machine main body 1 that opens in a clamshell shape for easy maintenance, inspection, paper jam removal, etc.
It has a configuration in which it is attached to both the upper and lower frames of
A locking mechanism 186 of the copying machine main body 1 is installed in the upper unit 182, and a locking claw 186a of the locking mechanism 186 is engaged with an engagement hole 188 formed in the frame 187 of the lower unit 184. It is something.

The heat roller 183 attached to the frame 189 of the upper unit 182 is made of, for example, an aluminum pipe material (φ23) with a wall thickness of approximately IU, and the surface thereof is coated with Teflon resin to prevent toner from adhering, and the inside is used for heating. It has a structure in which a heater lamp 190 consisting of a halogen lamp (900W) is inserted, and both ends are fixed by a front electrode 192 and a rear electrode 193 attached to an insulating member 191.

In order to have the ability to heat the heat roller 183 to 190°C within 25 seconds using the lamp heat of the 900W halogen lamp 190, the thickness of the heat roller 183 must be increased by 1.
．． It is effective to keep it within 5M, and the W number of the lamp, the time (T) to reach 190°C, and the heat roller 183
The relationship between the wall thicknesses of the heat roller 183 is shown in FIG.
A heat insulating drive gear 194 made of, for example, polyphenylene thylphide and a sliding bearing 195 are provided at the end of the heat roller 183. At the same time, it is attached to the frame 189 via the sliding bearing 195 with a heat insulating function. Furthermore, 1 in 1 figure
96 is a thermistor, which applies the maximum pressing force to the heat roller 183 via a plate spring 197 of 80 to 120 iP/crr.
The heat roller 183 is supported by the frame 189 so as to be in constant contact with the heat roller 183, and the surface temperature of the heat roller 183 is kept at 190.
The heater lamp 190 is turned on to maintain the temperature at ±20°C.
It can be controlled by turning it off. Reference numeral 198 in Figure 1 denotes a light shielding plate attached to both ends of the heater lamp 190, which reduces light leakage during inspection of the heater lamp and serves as a guide when attaching the heater lamp 190 when assembling the fixing unit. Furthermore, 199 in the figure is a temperature fuse, which is attached to the frame 189 via a holder 200, and this holder 200 is made of a heat-resistant resin such as polyphenylene sulfide, and is made of a heat-resistant resin such as polyphenylene sulfide. The fuse 199 is accurately positioned relative to the heat roller 183 to ensure stable operation of the temperature fuse 199. Further, in FIG. 5, 201 is a cleaning blade made of silicone rubber or the like, and is designed to scatter off the toner after fixing that has slightly adhered to the heat roller 183.

On the other hand, the press roller 185 has a core metal with a diameter of 8 m11 w, a wall thickness of 8 illi, and a hardness of 20' to 30' (JIS
-A scale) silicone rubber, and the line connecting the center with the heat roller 183 is 10° to 12° from the vertical line.
By tilting the transfer material P, it is possible to prevent the rear end of the transfer material P from jumping up, and it is rotatably supported by a support member 202 via a pusher 203, and pressure is applied via this support member 202. A spring 204 applies pressure to the heat roller 183 and brings it into contact.

It can be driven by the heat roller 183. Reference numerals 205 and 206 in the figure are paper ejection rollers that send out the transfer material P to the paper ejection tray 7 side. The angle formed by the line connecting the contact point and the contact point of the paper ejection rollers 205 and 206 is 00 to 20
It is located at the bottom side with an angle of
? /1fli) l: It is designed to prevent ilJ (in this case, if the angle is 30° or more, especially 80°
? /rr? (There is a risk that cardboard, etc. that is thicker than paper may curl downward.) The lower paper ejection roller 205 is formed by press-fitting a rubber roller 205b made of, for example, butadiene acrylonitrile rubber onto a stainless steel shaft 205a.
Both ends of the frame 187 are held via sliding bearings 207, and the ends of the support member 202 that supports the press roller 185 rest on the sliding bearings 20"l and 207 at both ends, so that the support member 202 is supported so as to be able to rotate about the shaft center of the lower paper ejection roller 205. A driving gear 20B is provided at the rear end of the lower paper ejection roller 205.

This gear 20B meshes with a gear 209 provided at the end of the press roller 185 via an intermediate gear 210, and can be driven together with the rotation of the press roller 185. roller 18
The gear 209 of the press roller 185 and the lower paper ejection roller 205 are supported by the support rod 211 which rotates around the axis of the press roller 185, and are also brought into contact with the shaft of the lower paper ejection roller 205 at its free end. The center-to-center distance between the roller 205 and the gear 208 is always maintained at an appropriate value, thereby ensuring that the supporting member 2
Even if the press roller 185 moves up and down due to the up and down movement of 02, each gear group 208, 209, 210 can always operate well. At this time, the lower paper ejection roller 205 is driven by the press roller 185, which is driven by the heat roller 183, through gears 208, 209, 210, so its circumferential speed depends on the thermal expansion of the press roller 185. Therefore, when the press roller 185 thermally expands during fixing, the diameter of the roller is
By setting the peripheral speed to be 2 inches higher than the circumferential speed of 85, wrinkles and the like can be prevented and stable paper feeding performance can be obtained.

The upper paper ejection roller 206 has a configuration in which two polyacetal rollers are integrally formed on each side and attached to the upper frame 189, and the center portion thereof is pressed by a spring material 212 to apply pressure. The lower paper ejection roller 2
05, and a paper discharge detector 213 is installed near the contact point with the lower paper discharge roller 205.

Furthermore, 214 in the figure is a fixing section consisting of the heat roller 183 and press roller 185, and paper ejection rollers 205, 2.
A peeling claw made of a heat-resistant resin such as polyphenylene thylphide is provided between the heat roller 183 and the heat roller 183 with an optimum force of 10 to 201, and is supported via a spring material 215. , is configured to also serve as a guide for the transfer material P.

That is, the heat roller 183 and the press roller 18
The transfer material P passed through the fixing section between 5 and 5.

The transfer material P is prevented from being wrapped around the heat roller 183 by the peeling claw 214 and sent between the paper ejection rollers 205 and 206, and further passed between the paper ejection rollers 205 and 206.
is brought into contact with the extension 189a of the upper frame 189 of the fixing unit, which is installed on the common tangent of the paper ejection rollers 205, 206 at an angle of 45 degrees or less with the tangent, and the transfer material is removed.
The frame 189 is grounded, thereby making it possible to easily eliminate static electricity after fixing the transfer material without using a separate static eliminating means, and to eliminate unnecessary electric charges. This prevents curling of the transfer material after paper.

By the way, the lower paper ejection roller 205 attached to the lower fixing unit 184 mentioned above supports the cut-and-raised portion J87a11 formed on the lower frame 187. If the lower paper ejection roller 205 is allowed to move freely with a margin of 50 for each, the support plate 202 that supports the press roller 185 can be moved freely.
The press roller 185 can also be made free to move.
can be moved back and forth, and when the upper fixing unit 182 of the copying machine main body 1 is closed in this state, a part of the upper frame 189 is attached to the sliding bearing 207 of the lower paper ejection roller 205.
In order to position the lower paper ejection roller 205 of the lower fixing unit 184 by riding on the lower paper ejection roller 205,
05 and the upper paper ejection roller 206 can be maintained in parallel, and similarly, the heat roller 183 and the press roller 185 can always be in parallel contact to obtain an optimal contact state. Even with a separate structure, stable paper feeding is always achieved.

By the way, the photoreceptor 10, charger 1, and cleaning device (cleaner section) 18 shown in FIGS. 9 and 14 are assembled into a cartridge type unit as described above, and are assembled to the frame 130. , the toner storage box 117 is connected to the drum shaft flange 14, as shown in FIG.
1, and is assembled to the outside of the front frame 132 with a distance d that allows it to be squeezed, and one of the sleeve portions 1
17a faces the inside of the cleaner box 133, and the other sleeve part 117b faces the inside of the photoreceptor 10 to communicate between the cleaner box 133 and the photoreceptor 10, and as shown in FIG. Spiral conveyor auger 116 disposed within 133
One end of the toner storage box 11 is passed through the sleeve portion 117a.
The residual developer of the visible image on the cleaned photoreceptor 10 deposited in the cleaner box 133 facing inside the toner storage box 11 is removed by the rotation of the transport auger 116.
7 and the residual developer introduced into the toner storage box 117 is transferred to the photoreceptor 10 side by a spiral conveyance auger 121 that rotates as a result of a ladder sprocket 118, a ladder chain 119, and a ladder sprocket 120. This transport auger 121 is transported to the 27th
As shown in the figure, the front flange 1 on the end surface of the photoreceptor 10
The drum shaft 142 of the drum shaft flange 141 which is inserted into the insertion hole 106a of 06 and supports the photoreceptor 10 can be carried into and stored inside the photoreceptor 10. Further, the rotational driving force of the conveyance auger 116 is generated by rotating a drive gear 220 provided at the rear shaft end of the conveyance auger 116 through an intermediate gear 221 and meshing with a drive system on the apparatus main body (not shown). body 1
It can be transmitted and interlocked by meshing with the gear 222 of
The drive of the mechanism for conveying and carrying in the residual developer to the photoreceptor is linked to the drive system on the main body side as well as the drive of the photoreceptor.

Furthermore, the toner storage box 117.

The cover, which forms a conveyance path for the residual developer from the cleaner box 133 to the photoreceptor 10 side, also serves as a handle of the unit, making it convenient to handle the cartridge when taking it in and taking it out.

In addition, 223 in FIG. 1 is a seal made of an elastic member such as urethane, and is used to prevent residual developer stored inside the photoreceptor 10 from clogging the insertion hole 106a into which the shaft 142 is inserted. ing.

Furthermore, the tossing device 15 shown in FIGS. 15 to 19 has an opening in the upper part into which the developer powder (toner) replenishment hopper 163 is inserted and installed from above,
This opening is connected to an upper cover 172 that constitutes the upper wall surface of the apparatus main body.

The hopper 163 can be positioned and supported between ribs 174 and 175 formed between the side cover 173 forming one side wall surface and protruding from these covers 172 and 173. Further, the main body 15 of the apparatus is lowered from above through two guide pins 158 and 159 protruding from both sides of the guide groove 161 and the engagement groove 162 of the holding plate 160 fixed to the top frame of the main body. When installing, if you lift it with the handle 152, due to the center of gravity,
The upper guide bin 15B rotates slightly and comes out in front of the lower guide bin 159, so if it is lowered as it is, the lower guide bin 159 will slide on the side surface of the holding plate 160 (the right side surface in FIG. 16). It engages with the engagement groove 162 in a natural manner, allowing easy positioning of the device body. Furthermore, the side cover 1 of the device main body 15
Part of 73.

When the hopper 163 is in a disengaged state, it can be tilted inward by a shaft 176.

In this tilted state, the lip 175 provided on the inner surface serves as a lid plate for closing the upper opening of the device body.
By burying the plastic in the developer stored in the device body and pressing down on the plastic from above, it is possible to prevent the developer from moving laterally. The developer is unevenly distributed. problem solved.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, a part of the side wall forming the upper opening can be tilted inward, the opening is covered with the part of the side wall, and a part of the inner surface of the side wall can be tilted inward. Since it is configured to be buried and pressed into the developer stored in the device body, it is possible to prevent the developer from shifting inside the device body during transportation. This has an excellent effect in that it is possible to pack and transport the developer while it is still stored.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic explanatory diagram of the internal structure of an image forming apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the same open state, and FIGS. The figure is a schematic explanatory diagram showing the transfer material feeding mechanism, FIGS. 7 and 8 are schematic explanatory diagrams showing the document table drive mechanism, and FIGS. 9 to 11 are schematic explanatory diagrams showing the exposure mechanism. 12 and 13 are schematic explanatory diagrams showing the drive mechanism of the static elimination shutter in the static elimination device, and FIG. 14 is a schematic diagram showing an exploded view of the charging mechanism and cleaning mechanism around the image carrier (photoreceptor). Explanatory diagrams, Figures 15 to 19 are schematic diagrams of the image machine, Figures 20 to 23 are schematic diagrams of the fixing mechanism, and Figure 24 is the thickness and thickness of the heat roller of the fixing mechanism. An explanatory diagram showing the relationship between the wattage of the heater lamp and the heating time, Figures 251m to 27 are for transporting and storing the residue (residual developer) of one image in the developing section after cleaning by the cleaning device inside the image carrier. It is a schematic explanatory view showing a mechanism. 1... Copying machine main body, 15... Developing device, 172...
・Top cover, 173...Side cover, 174°17
5... Rib, 176... Rotating shaft. Applicant's agent Patent attorney Takehiko Suzue 18 Kaisho 6l-114263 (13) Guku U) Part 15 Figure 16

Claims (4)

[Claims] (1) In a developing device that has an opening in the upper part into which a developer replenishment hopper is inserted and stores developer therein, a part of the side wall forming the opening can be tilted inward. A developing device characterized by: (2) The developing device according to claim 1, wherein a portion of the side wall allows the opening of the main body to be covered in a tilted state. (3) A rib is formed on the inner wall surface of a part of the side wall, and the rib can be buried in the developer when the side wall is tilted. Developing device described in . (4) The developer inside the main body is held down by tilting a part of the side wall,
The developing device according to any one of claims 1 to 3, characterized in that the developing device prevents lateral movement of the developer.