JPH01124886A - Image recording device - Google Patents

Abstract

PURPOSE:To prevent a cleaning member from deteriorating by providing a member which abuts on a cleaning blade and scrapes off sticking matter the tip of the blade when the cleaning blade is separated from a photosensitive body in a carrier case. CONSTITUTION:The cleaning blade 12 is installed in the carrier case 19 of a carrier unit 17 so that it can swing; and a main body upper part 10a is provided with the member which makes the cleaning blade 12 abut on the photosensitive body 4 when the main body upper part 10a is closed and separates the cleaning blade 12 from the photosensitive body 4 when the main body upper part 10a is opened. Further, the tip of the blade 12 is cleaned by a 1st auxiliary blade 86 as a separating member provided to the blade 12 when the cleaning blade 12 is separated from the photosensitive body 4 in the carrier case 19 and toner falls in a toner recovery room 15. Consequently, the cleaning performance does not deteriorates.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image recording apparatus, and more particularly to an image recording apparatus such as a copying machine, facsimile machine, printer, etc., which has a process unit using a dry developer.

2. Description of the Related Art The applicant of this application first proposed an image recording apparatus of the type described above, in which a carrier unit consisting of a photoreceptor, a cleaning member, a static eliminating member, etc., and a developing unit are connected to the upper part of the main body in an openable and closable manner. The present invention has proposed an image recording apparatus that is detachably installed separately in an image forming unit case of a recording main body having a lower part, thereby facilitating repair, inspection, or replacement of each unit.

Problems to be Solved by the Invention By the way, in the previously proposed image recording apparatuses as described above, the cleaning blade is constantly in contact with the photoconductor, so even after cleaning, toner and dust can cause the tip of the cleaning blade to touch the photoconductor. There is a problem in that some substances adhere to the body and do not fall, and when such substances become large, the cleaning performance deteriorates.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the previously proposed image recording apparatuses as described above, and to prevent toner and dust from accumulating between the tip of the cleaning blade and the photoreceptor after cleaning. It is an object of the present invention to provide an image recording device whose cleaning performance is not deteriorated by these factors.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a cleaning device in the carrier case of the carrier unit consisting of the photoreceptor, the cleaning member, the static eliminating member, etc. in the previously proposed image recording apparatus. The blade is installed so that it can swing, and when the top of the main unit is closed, the cleaning blade touches the photoreceptor,
A member is provided at the top of the main body to separate the cleaning blade from the photoreceptor when the top of the main body is opened.

Furthermore, the present invention is characterized in that a member is provided in the carrier case to come into contact with the cleaning blade and scrape off deposits on the tip when the cleaning blade is separated from the photoreceptor.

Function: In the image recording device as described above, when the top of the main body is closed during recording, the tip of the cleaning blade comes into contact with the photoreceptor and performs cleaning work, causing repair and inspection of the carrier unit. Alternatively, when the upper part of the main body is opened for replacement, the tip of the cleaning blade automatically separates from the photoreceptor, and the scraping member scrapes off the deposits on the tip of the cleaning blade.

Embodiment Among the illustrated embodiments, the parts related to the existing proposal will be explained first.

FIG. 1 shows a laser plink as an example of an image recording device, in which recording paper 2 is fed in the direction of arrow A from a paper feed bag [1], and is timed by a pair of registration rollers 3 to form a drum-shaped photoreceptor 4. The latent image carrier is transported to the latent image carrier.

The photoreceptor 4 is rotationally driven in a clockwise direction, the surface of which is charged by a charger 5, and irradiated with laser light from a laser optical system 6 to form an electrostatic latent image on the photoreceptor 4. This latent image is made visible by toner when passing through the developing roller 22 of the developing unit 17, and this visible image is transferred by the transfer charger 8 to the recording paper conveyed to the photoreceptor 4, and the transferred recording paper 2 The upper visible image is fixed by the fixing device 9. The recording paper 2 that has exited the fixing device 9 is indicated by arrow B.
As shown in , the paper is discharged from a discharge section ILA formed by the upper wall surface of the printer main body 10.

On the other hand, residual toner is removed from the photoreceptor portion after the visible image has been transferred by a cleaning device having a cleaning blade 12 , and the charge is removed by a charge removing member 13 .

The toner removed from the photoconductor 4 is collected by the impeller 14 into the toner collection chamber 15 and stored there.

In the illustrated laser printer, as also shown in FIG. 2, the carrier unit 16 and the developing unit 17 (FIG. 5) are located in the second, third, . As shown in FIG. 7, the image forming unit case 1
8 and are supported separately and detachably. The carrier unit 16 has a box-shaped carrier case I9 as shown in FIG. A hole 20 is formed through which the laser beam from 6 enters, and a toner collection chamber 15 is formed by the case 19 itself. Furthermore, as shown in FIG. 1, the case 19 supports the charger 5, the neutralizing member 131, the impeller 14, and the cleaning blade 12, respectively.

Further, the developing unit 17 is provided with a toner case 21.0 which accommodates the toner T, as is clear from FIG. A developing roller 22 opposed to the photoreceptor 4, a regulating blade 24 regulating the layer thickness of toner on the developing roller, a supply roller 23 supplying toner to the developing roller 22, and an agitator 26 stirring the toner T in the case 21. The supporting shaft 22 of the developing roller 22
a, the supply roller 23 and the agitator 26 are connected to the case 21
The regulating blade 24 is also assembled to the main body case 21 . Furthermore, a toner cartridge 25 is detachably attached to the case 21, and when the amount of toner remaining in the case 21 becomes low, the previously attached cartridge 25 can be replaced with a new cartridge containing toner. Replenish toner.

The printer main body 10 has an upper main body 1 as shown in FIGS.
The main body upper part 10a can be opened and closed with respect to the main body lower part 10b centering on a hinge provided on the back side. In this case, the one image forming unit case 18 is supported by the lower part 10b of the main body so as to be rotatable in the vertical direction, and is locked to the lower part 10b of the main body by a locking device which will be described later.

Therefore, the carrier unit 16 and the developing unit 17 also belong to the lower part 10b of the main body, and as shown in FIG.
When opened, both units 16, 17 expose their upper parts.

The image forming unit case 18 is formed into a box shape with an open top as shown in FIG. 6, and has front and rear walls 18a, 18.
b is formed with a pair of groove-shaped support portions 27 that support the support shaft 4a of the photoreceptor 4 on one end side of the carrier unit 16 via bearings, and a developing roller 22 on the one end side of the developing unit 17. A pair of support portions 28 that similarly support the support shaft 22a of the image forming apparatus via bearings are provided integrally with the case 18, and these support portions 27 and 28 constitute a support means for the image forming unit. In this case, the surface of the support portion 28 that supports the support shaft 22a is formed horizontally.

Apart from this, the support shaft 22a of the developing roller 22 may be supported by the walls 18a and 18b themselves.

In the carrier unit 16, the support shaft 4a of the photoreceptor 4 is connected to the support portion 27.
In addition to being supported by the first stopper 2 as shown in FIG.
It is locked to the case 18 by 9.

This stopper 29 is integrally molded with the image forming unit case 18, and is made of an elastically deformable material such as synthetic resin, and can be elastically deformed in the direction of arrow C. The stopper 29 has a knob 30 and a stop claw 3.
1 is formed, and this claw 31 engages with the locking portion 19a of the case 19 of the carrier unit 16, whereby the carrier unit 16 housed in the image forming unit case 18 is moved as shown in FIG. Retained. Therefore, when repairing, inspecting or replacing the carrier unit 16, the upper body 10
a as shown in FIG. 2 and pull the knob 30 to the left in FIG. The unit 16 can be lifted upward as it is. At this time, the support shaft 4a of the photoreceptor 4 is also removed from the groove-shaped support portion 27 with an open top without any trouble. Conversely, when attaching the carrier unit 16 to the image forming unit case 18, the unit 16 is lowered from above and housed in the image forming unit case 18, and the support shafts 4a are fitted into both supporting parts 27, and the support unit 16 is inserted into the image forming unit case 18. When the body unit 16 is lightly pushed from above, the case 19 presses the stopper 29 in the direction of arrow C to elastically deform it, and the stop claw 31 can be engaged with the locking part 19a of the carrier unit 16. .

Similarly, the developing unit 17 is also locked to the case 18 by a second stopper 39 formed integrally with the image forming unit case 18. This stopper 39 also has a stop claw 41 and a knob 40, is made of synthetic resin, for example, and is elastically deformable in the direction of the arrow in FIG. When the developing unit 17 is housed in the image forming unit case 18, the stop claw 41 of the second stopper 39 engages with the engaging portion 21a formed on the case 21 of the developing unit 17, and holds the developing unit 17. . In addition, when removing the developing unit 17 for the purpose of maintenance inspection or replacement, pull the knob 40 in the direction of the arrow in FIG. 7 to elastically deform the stopper 39 and remove the claw 41 from the engaging portion 21a. , lift the unit 17 upward. On the other hand, when attaching the unit F, the developer unit 17 is lowered from above to the bottom in the same way as the carrier unit 16, and the stopper 39 is pressed to the right to elastically deform it, and the claw 41 is moved to the engaging portion 21a. to engage. After engagement, the stopper 39 elastically urges the developing unit 17 to the left in FIG.

The carrier unit 16 and the developing unit 17 are placed in case 1.
8, the lower part 10b of the main body and the case 18 are maintained in a horizontal state, so that the work can be done in a comfortable posture.

When the carrier unit 16 is supported by the image forming unit case 18, a part of the photoreceptor 4 enters the opening 43 formed in the bottom wall of the case 18, and a gear (not shown) attached to the support shaft 4a. ) also enters the opening 43 and is driven by meshing with a gear (not shown) supported on the lower part 10b of the printer body. Similarly, the gear 44 of the developing roller support shaft 22a and the gears of the supply roller 23 and the agitator 26 (not shown)
are also engaged with the gears on the lower part 10b of the main body and are driven to rotate.

As described above, the carrier unit 16 and the developing unit 17 can be easily locked to the image forming unit case 18 by the stoppers 29 and 39, and the locking can be released, eliminating the need for complicated operations as in the past. There isn't. Each unit 16, 17 is attached to the printer main body 10 and housed in an image forming unit case 18, and is locked by stoppers 29, 39, but this case 18 is properly positioned in the lower part 10b of the main body 10, as will be described later. Therefore, by locking each unit 16.17 to the case 18, these units 16.17 can be positioned and set with respect to the main body 10. Further, one end side of the carrier unit 16 and the developing unit 17 is connected to the supporting portion 2.
7 and the support part 28, and each unit 16, 17 is positioned with respect to the case 18 by the other end side or each stopper 29,
39, each unit 16, 17 can be correctly positioned and set with respect to the case 18. In this embodiment, a rear pressure spring 33, which will be described next, is used so that the position of the developing unit 17 with respect to the carrier unit 16 can be easily and correctly set. A rear pressure spring 33 is supported by a holding piece 32 on the right wall surface 18c of the image forming unit case 18 in FIG. Developing unit 1
7 is pushed to the left. At this time, since the support shaft 22a of the developing roller 22 is placed on the upper surface of the horizontal support portion 28 in a horizontally movable state, when the developing unit 17 is biased to the left, the developing roller 22 is pressed against the photoreceptor 4. At this time, the support shaft 4a of the photoreceptor 4 is fitted into the groove-shaped support portion 27, and movement in the horizontal direction is prevented, so that the developing roller 22 and the photoreceptor 4 are evenly spaced over their entire length in the longitudinal direction. press against. In this way, the relative positions of the photoreceptor 4 and the developing roller 22 can be easily and reliably determined, the parallelism of the two and the positional accuracy of the distance between the axes can be achieved, and the pressing force between the two can be kept within a predetermined appropriate value. Can be done. This configuration can also be adopted when the surfaces of the developing roller 22 and the photoreceptor 4 are both made of rigid bodies, but when at least one of them is made of an elastic body, this elastic body is connected to the spring 33.
This is particularly advantageous because it can be appropriately elastically deformed by the pressing force and maintain the contact area between the two necessary for development at an appropriate size. Furthermore, even if the photoreceptor 4 or the developing roller 22 vibrates to some extent during printer operation, the spring 33 elastically presses the two, so the contact area does not change greatly due to vibration, and a high-quality visible image is always produced. It is possible to obtain

Even in a developing device in which the developing roller 22 and the photoreceptor 4 are arranged with a predetermined gap, the spring 33 urges the developing roller 22 toward the photoreceptor 4, and the roller 22 is brought into contact with the spindle stopper of the roller 22, thereby separating the two. It is possible to position.

A biasing means other than the spring 33 may be used, and the pressing force of this biasing means may be applied directly to the developing unit 17. It is also possible to support the biasing means on the developing unit side.

After holding the carrier unit 16 and the developing unit 17 in the image forming unit case 18 as described above, the main body upper part 10a is closed as shown in FIG. 1 to perform a printing operation.
The carrier unit 16 and the developing unit 17 are connected to a stopper 29
．． 39 to the case 18, it is conceivable that these units 16.17 may move or vibrate in the vertical direction relative to the image forming unit case 18 due to an external force acting on each unit 16.17. If such a situation occurs, the quality of the visible image formed on the recording paper may deteriorate. In the printer shown there, 1
On the bottom surface of the image forming unit case 18 and on the main body frame (hereinafter referred to as upper frame) 34 of the main body upper part 10a, a seventh
As shown in the figure, elastic bodies 35 and 36 made of sponge, rubber, foam, compressed coil springs, etc. are pasted or attached. When the upper part 10a of the main body is closed, the upper frame 34 presses the carrier unit 16 and the developing unit 17 via the elastic body 36, and as a result, both units 16 and 17 also press against the bottom surface of the case 18. They are configured to be elastically pressed together via an elastic body 35. As a result, both units 16 and 17 are held elastically and firmly in the vertical direction, and these units are held in the case 1.
8, the disadvantage of movement or vibration is prevented or suppressed. Also each unit 16.17 is case 18
When the units 16 and 17 are housed in the case 18 and locked to the case 18 by the stoppers 29 and 39 described above, the elastic body 35 urges these units 16 and 17 upward, so the stopper 2
Locking at 9°39 can be made more secure.

The elastic bodies 35 and 36 are connected to the main body upper part 10a and both units 16.
, 17 or between these units 16, 17 and the case X18, and the elastic body 35
．． 36 may be attached to each unit 16 and 17. In the configuration using the elastic body, the carrier unit 16 and the developing unit 17 are assembled as one unit. You can also hire when you are available.

By providing the elastic bodies 35, 36 as described above, it is possible to prevent vertical movement or vibration of both units 16, 17. However, in the illustrated printer, the developing roller 22, which rotates counterclockwise, rotates at a faster circumferential speed than the photoreceptor 4, which rotates clockwise.
The developing roller 22 receives a strong external force directed diagonally upward as indicated by arrow E in FIG. 2 from the photoconductor side. For this reason, it may be difficult to hold the developing unit 17 immovably in the vertical direction only by pressing the main body upper part 10a through the above-mentioned elastic bodies 35, 36. In the illustrated embodiment, the ninth
A lock lever 37 is provided as a holding member for the developing unit 17 shown in FIG.

This lock lever 37 is rotatably attached to the shaft 22a of the developing roller 22, and is always urged by a spring 38 to rotate counterclockwise in FIG. 8.

Therefore, when the upper part 10a of the main body 1 is closed after the developing unit 17 is set in the apparatus, the upper horizontal part 46 of the lock lever 37 is pressed as shown by the arrow by the pressure lever (not shown) attached to the upper part 10a of the main body. When the drive side plate is rotated in the direction of the arrow, a stopper 47 provided on the drive side plate engages with a slot 49 in the vertical portion. In this way, the driving side of the developing unit 17 is held between the lock lever 37 and the stopper 47, and the driven side is held between the upper and lower sides by the horizontal support member 48 consisting of rollers and the compression coil spring 36, and is moved slightly in the horizontal direction. However, it is locked so that it cannot be moved vertically.

Furthermore, the lower surface of the central portion of the unit is supported by a horizontal support member 48' made of rollers. When removing the developing unit 17 from the image forming unit case 18,
By opening 0a, both the lock lever 37 and the compression coil spring 36 are released, and the developing unit 17 can be easily removed.

Next, a configuration related to positioning and holding the image forming unit case 18 will be described.

As shown in FIG. 6, a pair of pivot pins 52 and 53 are provided protruding from the left side wall 18d of the nine-imaging unit case 18.
These pins 52. ! y3 is each side plate 54a of the main frame (hereinafter referred to as lower frame) 54 of the lower main body 10b;
It fits into support grooves 55 and 56 drilled in 54b.

Therefore, as shown in FIG. 3, the upper part 10a of the main body can be opened and the image forming unit case 18 can be rotated about the pivot pins 52 and 53 while housing the carrier unit 16 and the developing unit 17. In this case, since the lower part of the case 18 is the transport path for the recording paper, the case 18
By rotating upward in this manner, the conveying path is exposed to the outside, so that the recording paper stuck there can be easily removed. The case 18 can also be taken out from the lower part 10b of the main body if necessary.

When the image forming unit case 18 is placed in the mounting position shown in FIGS. 1 and 7, the case 18 is attached to the lower part 10b of the main body
In particular, it is necessary to correctly position and hold it with respect to the lower frame 54, and a locking device 57 is provided for this purpose. This locking device 57 has a rotating member 59 rotatably supported by a pair of pivot pins 58 protruding from the image forming unit case 18, and this rotating member 59 has a pair of lock claws 65. and a knob 66 are integrally formed.

In addition, the receiving part 6 is formed by cutting and bending a part of the rotating member 59.
7 and a horizontally formed portion 468 of the image forming unit case 18, a compression coil spring 69 is press-fitted between the rotation member 59 and the horizontally formed portion 468 of the image forming unit case 18, and the rotation member 59 is attached so as to rotate clockwise in FIG. Forced.

A pair of locking holes 70 are formed in the lower frame 54, and when the image forming unit case 18 is placed in the mounting position shown in FIG. They each become involved due to the action of .

In this case, the compression coil spring 7 is attached to the image forming unit case 18.
1 is provided, and the lower end of this spring 71 comes into pressure contact with a lever 72 pivotally supported on the lower part 10b of the main body as described later, so that when the case 18 is placed in the mounting position, the case 18
The spring 71 urges the pivot pin 52, 53 counterclockwise around the pivot pin 52,53.

Therefore, the lock claw 65 comes into pressure contact with the upper wall surface of the locking hole 70,
The case 18 is reliably locked and held in the installed position. A lock claw 65 is provided on the lower side of the main body.

A locking hole 70 with which this is engaged may be provided on the imaging unit case 18 side.

When opening the image forming unit case 18, pull the knob 66 of the rotating member 59 upward in FIG. As a result, the rotating member 59 rotates counterclockwise around the pivot pin 58, the lock claw 65 is disengaged from the lock claw 70, and the locked state is released, so that the case 18 can be moved around the pivot pin 52, 53 and can be opened to the state shown in FIG.

When the case 18 is rotated again to return to the position shown in FIG. 2 and pushed into the lower part 10b of the main body, the lock pawl 65 automatically engages with the locking hole 70 and the case 18 is locked. In this way, the image forming unit case 18 can be held with a simple operation. At this time, since the pivot pins 52 and 53 of the case 18 are engaged with the support grooves 55 and 56 of the lower frame 54, it is possible to hold the case 18 and at the same time correctly position the case 18 with respect to the lower part 10b of the main body. .

Instead of rotatably supporting the rotating member of the locking device, the locking claw may be elastically deformed to lock and release the lock.

As described above, the image forming unit case 18 is positioned by the locking device i57 with its rotation center side as a reference. Pivot pin 52 which is the center of rotation
, 53 slightly move or wobble relative to the support grooves 55, 56, the position of the case 18 will also become inaccurate.

The quality of the image on the recording paper may deteriorate.

When there is such a possibility, it is advantageous to engage the lower frame 54 with a portion of the case 18 at or near the center of rotation of the photoreceptor 4 to improve the positioning accuracy. In the example shown in FIG. 6, a positioning notch 74 is formed at or near one of the support parts 27 that supports the support shaft 4a of the photoreceptor 4, and a notch 74 for positioning is formed in the wall part 18a near the other support part 27. Forming a notch 75 for positioning, case 1
8 in the mounting position, the side plate 54 of the lower frame 54
A support plate 54c fixedly connected to b and the other side plate 5
Reference pins 77 and 78 protruding from the case 18 and 4a are engaged with the positioning notches 74 and 75, thereby increasing the positioning accuracy of the case 18. Each of the positioning notches 74 and 75 is open at its lower part, and is configured so that the pins 7 and 78 can be inserted into or removed from these notches 74 and 75 without any problem when the case 18 is rotated. If the case 18 is positioned near the photoreceptor 4 in this way, the case 18 will not shift even when the photoreceptor rotates.

As described above, since the image forming unit case 18 can be correctly positioned and held with respect to the lower part 10b of the main body, the carrier unit 16 and the developing unit 17, which are locked to the case 18 by the stoppers 29 and 39, are also secured to the main body 10, especially the main body. It is set in a correctly positioned state with respect to the lower part 10b.

By the way, as explained earlier, the recording paper is fed to the photoreceptor 4 at a timing determined by the pair of registration rollers 3, and as can be seen from FIG.
Drive roller 3a and driven roller 3 that rolls into contact with the drive roller 3a
It consists of b.

In this case, the driving roller 3a is supported immovably by the side plates 54a and 54b, but the driven roller 3b has its support shaft rotatably supported by the pivot of the lever 72 shown earlier.
When the image forming unit case 18, which is rotatably supported on the side plate by a pin 80, is held in the mounting position shown in FIG. presses the lever 72. As a result, the driven roller 3b comes into pressure contact with the driving roller 3a, and these rollers work together to transport the recording paper.When the imaging unit case 18 is opened (FIG. 2), pressure is applied by the spring 71 to the lever 72. The effect is canceled. Therefore lever 7
2 can be easily rotated by hand around the pin 80, and when recording paper becomes jammed between both rollers 3a and 3b, it can be easily removed. Paper transport rollers other than the registration rollers are similarly pressed by the case 18.

Alternatively, it is also possible to configure the pressure contact to be released.

The recording paper passes below the image forming unit case 18.
In the illustrated embodiment, attention is paid to this point, and the lower part of the rotary member 59 constituting the locking device 57 described above is used as the guide portion 82 for the recording paper.

This eliminates the need to provide another independent guide member on the right side of the case 18, reducing the number of parts. In addition, when the case 18 is rotated and lifted, the jammed paper can be quickly accessed, and the jammed paper can be removed. There is also the advantage that processing can be easily performed. For the same purpose, a plurality of ribs 81 are provided on the lower surface of the case 18, arranged in a direction perpendicular to the paper plane of FIG. 7, so that the recording paper can be guided by these ribs.

As described above, the functions of the case 18 can be expanded by allowing the image forming unit case 18 to press and release the registration rollers, and by configuring it to guide the recording paper.

The number of parts of the image forming apparatus can be reduced.

The present invention can also be applied to various image forming apparatuses other than laser printers, such as copying machines and facsimile machines.

Although the above-mentioned device has already been proposed by the applicant of this application, the present invention improves the carrier unit in the device as described above.

7 and 8 show details of this improved carrier unit 16.

The cleaning blade 12 is held by one end of a holder 84, which is swingably supported by the case 19 and constantly swings counterclockwise as shown by the arrow due to its own weight or a pressure member (not shown). , the tip of the cleaning blade 12 tends to move away from the photoreceptor 4. A pressure member 8 made of a compression spring is placed between the back of the holder 84 and the upper middle/middle wall 89 of the case 19.
5 is placed. A seal member 93 is provided below the pressure member 85 between the holder 84 and the intermediate wall 89 .

A support member 90 is attached to the case 19 below the pressure member 85.
A first auxiliary blade 86 and a second auxiliary blade 87, whose tips abut against the cleaning blade 12 and a second auxiliary blade 87, respectively, are attached to the supporting member 90 below the cleaning blade 12. ing.

These blades 86, 87 are usually made of polyester film or high density polyethylene, etc., with a thickness of 0.05 to 0.
．． A sheet material of about 3 m is suitable.

A through hole 91 is provided in the upper part of the case 19 on the side opposite to the holder 84 of the pressure member 85, and a rib 88 is provided on the back surface of the upper frame 34 at a position facing the through hole 91.

A through hole 92 is provided in the upper part of the case 19 on the opposite side from the pressure member 85 across the intermediate wall 89, and a fullness detection float 94 is provided so as to be movable up and down covering the through hole 92. A sensor 95 consisting of an optical sensor or the like is provided on the upper frame 34 at a position facing the upper frame 34 .

Incidentally, the case 19 is provided with a through hole 96 for removing waste toner and for escape from the mold, and 97 indicates a seal thereof.

In the above-mentioned device, FIG. 7 shows the upper frame 34 in a closed state, and the rib 88 of the upper frame 34 presses the pressure member 85 and swings the holder 84 in the direction opposite to the arrow to perform cleaning. The tip of the blade 12 is brought into contact with the surface of the photoreceptor 4 to clean the toner.

Next, when the upper frame 34 is opened during repair, inspection, or replacement of the carrier unit 16, the ribs 88 release the suppressing action of the pressure member 85 separated from the carrier unit 16. This causes the holder 84 to swing in the direction of the arrow.
At this time, the first auxiliary blade 86 cleans the tip of the cleaning blade 12 and the toner falls into the toner collection chamber 15 while separating from the photoreceptor 4 .

When the collection chamber 15 is filled with toner in this way,
The float 94 moves upward due to the pressing force, and the sensor 95 detects this, and an operating member (not shown) stops the operation of the device, or a display panel prompts the user to replace the case 19 of the carrier unit 16. Display.

Effects of the Invention The present invention is as described above, and the cleaning blade is swingably installed in the carrier case of the carrier unit, and when the upper part of the main body is closed, the cleaning blade is detached from its tip by a release member provided thereon. As the cleaning blade separates from the photoreceptor, the scraping member scrapes off the deposits on the tip, compared to conventional cleaning blades where the cleaning blade and photoreceptor are in constant contact with each other. This has the advantage that toner and dirt do not adhere and become stuck between the two, and therefore the cleaning performance does not deteriorate due to this.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the entire embodiment of the present invention excluding the parts shown in detail on the map, FIG. 4 is a perspective view of the carrier unit shown in the figure, FIG. 5 is a perspective view of the developing unit, and FIG. 6 is a perspective view of the image forming unit case. FIG. 7 is a vertical sectional front view of the main part of the embodiment of the present invention, FIG. 8 is a perspective view of some of the members of the same as above, and FIG. 9 is a slope of other parts of the embodiment of the above. 10 is a longitudinal sectional view of a portion of FIG. 9, and FIG. 11 is a longitudinal sectional view of a modification of the developing unit of FIG. 7. DESCRIPTION OF SYMBOLS 1...Paper feeder, 4...Photoreceptor, lO...Printer main body, 10a...Main body upper part, 10b... Main body lower part, 12...Cleaning blade, 15...Toner collection chamber , 16... Carrier unit, 17... Developing unit, 19... Carrier case, 34... Upper frame, 54... Lower frame, 84... Blade holder, 85... Addition Pressure member, 86...First auxiliary blade, 88...Rib, 89...Intermediate wall, 90...Support member Fig. 4 Fig. 5 Fig. 8

Claims (1)

[Scope of Claims] 1. A carrier unit consisting of a photoreceptor, a cleaning member, a static eliminating member, etc. is removably installed in a recording main body having an upper main body and a lower main body that are connected to each other so as to be openable and closable. In the image recording apparatus, a cleaning blade is swingably installed inside the carrier case of the carrier unit, and when the upper part of the main body is closed, the cleaning blade contacts the photoreceptor, and when the upper part of the main body is opened, A member for separating the cleaning blade from the photoreceptor is provided at the top of the main body,
The image recording apparatus further comprises a member disposed in the carrier case that comes into contact with the cleaning blade and scrapes off deposits on the tip thereof when the cleaning blade is separated from the photoreceptor. 2. The cleaning blade is held by a holder that is swingably installed on the carrier unit, and the holder swings by coming into contact with and separating from a rib provided on the back surface of the upper part of the main body. The image recording device according to scope 1.