JPH09269623A - Toner seal automatic winding device, process cartridge, and electrophotographic image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take up a toner seal at a high speed, while keeping the same maximum value of take-up torque as before and to shorten the take-up time by using an irregular shaped rotary member, for a take-up shaft or a transmission member for transmitting drive to the take-up shaft. SOLUTION: When an elliptic take-up shaft 1a to which a driving force has been transmitted, starts to rotate in the direction of arrow Y, the take-up torque becomes one obtained by adding the radius of the take-up shaft 1a to pealing force, because the elliptic take-up shaft 1a is formed into an ellipse having a short diameter 1a4 of the diameter (d) of a conventional cylindrical take-up shaft 1c. Therefore, the maximum value of the take-up torque appears in the initial and final stages of taking up, at the same level as the conventional one and a periodical fluctuation is obtained while a toner seal 3 is taken up. On the other hand, in the take-up speed of the toner seal 3, the take-up speed is periodically fluctuated as well, because the radius of the take-up shaft 1a is periodically changed. Therefore, the take-up speed is increased as a whole and the take-up time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic toner seal opening device for a toner container used in an electrophotographic image forming apparatus and a process cartridge equipped with the winding device.

Here, the electrophotographic image forming apparatus forms an image on a recording medium by using an electrophotographic image forming process. For example, an electrophotographic copying machine, an electrophotographic printer (eg, LED printer, laser beam printer, etc.). , An electrophotographic facsimile machine, an electrophotographic word processor, and the like.

[0003]

The present invention is a further development of the prior art described below.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a toner seal automatic opening device and a process cartridge in which the opening time of the toner seal is shortened, and an electrophotographic image forming apparatus to which the process cartridge is detachably mounted.

[0005]

SUMMARY OF THE INVENTION A first invention according to the present application supports a toner frame for accommodating a developer and having an opening, a toner seal for sealing the opening of the toner frame, and a developing member. A toner seal automatic winding device having a toner seal winding shaft for opening the toner seal of the developing means in an image forming apparatus having a toner frame and a developing frame joined to the toner frame. A deformed rotary member is used as a transmission member for transmitting the drive to the shaft, and the deformed rotary member has a moving length of the toner seal with respect to a rotation angle or a moving length of a peripheral surface of the deformable rotary member at an engaging portion of the pair of transmitting members. The toner seal automatic winding device is characterized by having a shape in which the ratio of the height changes.

A second aspect of the present invention is the toner seal automatic winding device according to the first aspect of the invention, wherein the irregularly shaped rotating member has an elliptical outer circumference with the centroid as the center of rotation. .

According to a third aspect of the present invention, in the toner seal, the peeling start portion at one end of the opening portion of the toner frame and the peeling end portion at the other end of the opening portion are stronger than the other portion. The first or second invention, wherein the winding shaft is attached to a peripheral edge of the winding shaft, and the circumferential length of the winding shaft is 1 / integral of an interval between the peeling start and the peeling end with respect to the opening of the toner seal. The automatic toner seal take-up device described in 1.

A fourth invention according to the present application is a process cartridge which can be attached to and detached from an image forming apparatus main body, and has an electrophotographic photosensitive member and a developing means, wherein the developing means accommodates a developer and has an opening. And a toner frame for sealing the opening of the toner frame, a developing frame body supporting the developing frame body and joined to the toner frame body, and an automatic winding device having a toner seal winding shaft. This toner seal automatic winding device uses a deformed rotating member as a winding shaft or a transmission member for transmitting drive to the winding shaft, and this deformed rotating member has a moving length of the toner seal with respect to a rotation angle. Alternatively, the process cartridge has a shape in which the ratio of the moving length of the peripheral surface of the odd-shaped rotating member in the engaging portion of the pair of transmitting members changes.

According to a fifth aspect of the present invention, the process cartridge comprises a charging means, a cleaning means, a developing means, and an electrophotographic photosensitive member, which are integrated into a cartridge, and the cartridge is attached to the main body of the image forming apparatus. It is the process cartridge according to the fourth invention, which is detachable.

According to a sixth aspect of the present invention, the process cartridge comprises at least one of a charging means, a cleaning means, a developing means and an electrophotographic photosensitive member, which are integrally formed into a cartridge, and the cartridge is attached to the main body of the image forming apparatus. The process cartridge according to the fourth aspect of the invention is detachable.

A seventh invention according to the present application is an image forming apparatus for detachably attaching a process cartridge to form an image on a recording medium, comprising: a, an electrophotographic photosensitive member, and a developing means. Is a toner frame that contains a developer and has an opening, a toner seal that seals the opening of the toner frame, a developing frame that supports the developing frame and is joined to the toner frame, and a toner seal winding. The toner seal automatic winding device is provided with a take-up shaft, and the toner seal automatic take-up device uses a deformed rotating member as a take-up shaft or a transmission member for transmitting drive to the take-up shaft. The member is a process cartridge having a peripheral surface shape in which a moving length of the toner seal with respect to a rotation angle or a ratio of a moving length of the peripheral surface of the deformed rotary member in an engaging portion of the pair of transmission members is changed; b. Medium And conveying means for feeding, an electrophotographic image forming apparatus characterized by having a driving source of said toner seal automatic winding device.

[0012]

2. Description of the Related Art Conventionally, in an image forming apparatus using an electrophotographic image forming process, an electrophotographic photosensitive member and process means acting on the electrophotographic photosensitive member are integrally formed into a cartridge, and this cartridge is used as an image forming apparatus. A process cartridge system detachable from the main body is employed. According to this process cartridge system, the maintenance of the apparatus can be performed by the user himself without relying on a serviceman, so that the operability can be remarkably improved. Therefore, this process cartridge system is widely used in electrophotographic image forming apparatuses.

In such a process cartridge, a photosensitive drum is provided, and a developing means is used to apply a developer (toner) to the latent image formed on the photosensitive drum.
The developing means is composed of a developing frame body holding a developing roller or the like for feeding the toner to the photosensitive drum, and a toner frame body containing the toner. Before use, the opening provided in the connecting portion of the toner frame with the developing frame is sealed with a seal member. When the process cartridge is attached to the main body of the image forming apparatus for the first use, the seal member that seals the opening of the toner frame is automatically opened. An electrophotographic image forming apparatus capable of driving an automatic sticker winding device is known.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

"Detailed Description of Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the following description, the longitudinal direction means a direction perpendicular to the recording material conveying direction, and the lateral direction means a direction perpendicular to the longitudinal direction.

(First Embodiment) A process cartridge according to a first embodiment of the present invention and an electrophotographic image forming apparatus (hereinafter, referred to as an image forming apparatus) using the process cartridge will be described with reference to the drawings.

{Overall Description of Process Cartridge and Image Forming Apparatus Equipped with It} First, the overall configuration of the image forming apparatus will be described. 14. FIG. 14 is a sectional configuration explanatory diagram of a laser beam printer having a process cartridge mounted therein, which is an aspect of the image forming apparatus, and FIG. 15 is a sectional configuration explanatory diagram of the process cartridge.

As shown in FIG. 14, the image forming apparatus C irradiates an optical image based on image information from the optical system 10 to form a developer (hereinafter referred to as toner) image on the photosensitive drum 17 which is an electrophotographic photosensitive member. Form. Then, the recording material 12 is conveyed by the conveying means 13 in synchronism with the formation of the toner image, and the toner image formed on the photosensitive drum 17 in the image forming portion cartridged as the process cartridge B is transferred by the transfer means 14. The recording material 12 is transferred to the recording material 12 by means of, and the recording material 12 is conveyed to the fixing means 15, and the transferred toner image is fixed and discharged to the discharging portion 16.

In the process cartridge B constituting the image forming section, as shown in FIG. 15, the photosensitive drum 17 is rotated to uniformly charge the surface thereof by the charging means 18.
The optical image from the optical system 10 is exposed on the photosensitive drum 17 via the exposure unit 19 to form a latent image, and the developing unit 20 forms a toner image corresponding to the latent image to form a visible image. . Then, the toner image is transferred onto the recording material 12 by the transfer means 14.
After the transfer, the cleaning means 21 is configured to remove the toner remaining on the photosensitive drum 17.

The process cartridge B includes a toner container 2 which is a toner frame body having a toner reservoir and the like, and a developing device 4 which is a developing frame body having a developing sleeve 20a and the like.
The cleaning frame 24 includes the photosensitive drum 17 and the cleaning unit 21.

Next, the structure of each part of the image forming apparatus C and the process cartridge B loaded therein will be described.

[Image Forming Apparatus] First, the configuration of each part of the image forming apparatus C will be described.

(Optical System) The optical system 10 irradiates a light beam to the photosensitive drum 17 by irradiating light on the basis of image information read from an external device or the like. As shown in FIG. A laser diode (not shown) and a polygon mirror 10b in the optical unit 10a,
The scanner motor 10c, the imaging lens 10d, and the reflection mirror 10e are housed.

When an image signal is given from an external device or the like, the laser diode emits light according to the image signal and illuminates the polygon mirror 10b with the image light.
The polygon mirror 10b is rotated at a high speed by a scanner motor 10c, and the image light reflected by the polygon mirror 10b irradiates the photosensitive drum 17 via the imaging lens 10d and the reflecting mirror 10e, and the surface of the photosensitive drum 17 is selectively selected. It is configured to be exposed to.

(Recording Material Conveying Means) Next, the structure of the conveying means 13 for conveying the recording material 12 will be described.
The recording material 12 according to the present embodiment can be of two types: a hand and a cassette paper feed. As shown in FIG. 14, when the recording material 12 is set on the paper feed tray 13a and image formation is started, the pickup roller 13b is used to remove the recording material 12 on the paper feed tray 13a. Separated roller pair 13c
The recording material 1 is separately fed by 1 and 13c2.
The sheet 2 is conveyed so that the front end of the sheet 2 abuts on the pair of registration rollers 13d1 and 13d2. Then, the pair of registration rollers 13d1 and 13d2 are driven and rotated in accordance with the image forming operation to convey the recording material 12 to the image forming portion. Further, the recording material 12 on which the image has been formed is conveyed to the fixing means 15, and the intermediate discharge roller pair 13e and the discharge roller pair 13f1,1 are also conveyed.
It is configured to discharge to the discharge unit 16 by 3f2. A guide member 13g for guiding the conveyance of the recording material 12 is provided between the rollers.

Further, the paper feed tray 13a has an inner member 13a.
1 and the outer member 13a2, the inner member 1 when not in use
3a1 and the outer member 13a2 are housed in the outer member 13a2.
Are configured to form the exterior of the image forming apparatus main body 25.

On the other hand, as shown in FIG. 14, the cassette feeding means has a loading portion for the sheet feeding cassette 13h at the inner bottom portion of the apparatus main body 25 so that the recording material 12 is not fed by hand. Is the paper cassette 13h loaded in the loading section
The recording material 12 in the inside is configured to be fed one by one from the top to the registration roller pair 13d1 and 13d2 by the pickup roller 13i and the feeding roller 13j. Further, after the pair of registration rollers 13d1 and 13d2, it is configured to be conveyed by the same member as in the case of the hand.

(Transfer Means) The transfer means 14 is for transferring the toner image formed on the photosensitive drum 17 in the image forming section to the recording material 12, and the transfer means 14 of the present embodiment is as shown in FIG. In addition, it is composed of a transfer roller. That is, the photosensitive drum 17 of the loaded process cartridge B
Is configured to press the recording material 12 by the transfer means 14, and a voltage having a polarity opposite to that of the toner image formed on the photosensitive drum 17 is applied to the transfer means 14 to cover the toner on the photosensitive drum 17. It is configured to be transferred to the recording material 2.

(Fixing Means) Next, the fixing means 15 is for fixing the toner image transferred to the recording material 12 by the voltage application of the transfer means 14, and as shown in FIG.
It is composed of a driving roller 15a that is driven to rotate, and a fixing roller 15b that has a heat generating member inside and that is driven to rotate by being pressed against the driving roller 15a. That is, when the recording material 12 to which the toner image is transferred in the image forming portion is passed between the driving roller 15a and the fixing roller 15b, both rollers 15a,
The pressure is applied by pressing 15b, and the fixing roller 1
Heat is applied by the heat generated by 5b.
As a result, the toner transferred to the recording material 12 is fixed.

(Process Cartridge Mounting Means) When the opening / closing member 26 is opened, the cartridge mounting means shown in FIG.
As shown in FIG. 6, a cartridge mounting space is provided, and a cartridge mounting guide portion 35 is provided on the left and right inner side surfaces of the image forming apparatus main body 25. The left and right guide portions 35
A first guide rail 35a and a second guide rail 35b for inserting the process cartridge B are provided opposite to each other. On the other hand, on both outer side surfaces of the process cartridge B, projecting outward from the rotation center position of the photosensitive drum 17,
A columnar protrusion 35c having substantially the same radius as the groove 35a1 provided at the end of the first guide rail 35a is provided, and a guide protrusion 35d is provided continuously to the columnar protrusion 35c. Further, an engaging portion 35e is provided on the lower front side in the insertion direction of the process cartridge B.

When the process cartridge B is mounted, the cylindrical protrusion 35c of the process cartridge B is attached.
The guide ridges 35d are guided by the first guide rails 35a, and the engaging portions 35e are guided by the second guide rails 35b.
The process cartridge B is mounted in the image forming apparatus C by inserting the process cartridge B in the state of being guided by the above and closing it by the opening / closing member 26. When the process cartridge B is mounted, a detection unit (not shown) is activated to send a mounting signal of the process cartridge B to the detection unit of the image forming apparatus main body 25 to confirm the mounting.

{Process Cartridge} Next, the structure of each part of the process cartridge B mounted in the image forming apparatus C will be described. The process cartridge mentioned here includes at least a developing unit 20 as a process unit that acts on the photosensitive drum 17 provided as an electrophotographic photosensitive member.

The process cartridge is a cartridge in which the charging means or the cleaning means, the developing means and the electrophotographic photosensitive member are integrated into a cartridge, and the cartridge can be attached to and detached from the main body of the electrophotographic image forming apparatus. Is. Further, at least one of the charging means and the cleaning means, the developing means and the electrophotographic photosensitive member are integrally made into a cartridge so as to be attachable to and detachable from the electrophotographic image forming apparatus.

In the present embodiment, the developing means 2
0, a process in which an electrophotographic photosensitive member, a charging roller provided as a charging unit for charging the surface of the electrophotographic photosensitive member, a cleaning unit for removing toner remaining on the surface of the electrophotographic photosensitive member, and the like are integrally configured. The cartridge B will be described with reference to FIG.

Process cartridge B of this embodiment
As shown in FIG. 15, a developing unit 20 that visualizes a latent image on the surface of the photosensitive drum 17 by using a charging unit 18, an exposing unit 19, and toner around the electrophotographic photosensitive drum 17 which is an electrophotographic photosensitive member. Further, the cleaning means 21 is disposed, and these are covered with a housing composed of the toner container 2, the developing device 4, and the cleaning frame 24 to be integrated, and are configured to be attachable to and detachable from the image forming apparatus main body 25.

The photosensitive drum 17 according to the first embodiment is constituted by coating an organic photosensitive layer on the outer peripheral surface of a drum base made of cylindrical aluminum. A drum shaft 17a in which the photosensitive drum 17 is fixed to the cleaning frame 24
Image is formed on the photosensitive drum 17 by transmitting the driving force of a driving motor (not shown) from a driving gear 30 to a drum gear 17b (see FIG. 13) fixed to one end of the photosensitive drum 17 in the longitudinal direction. It is configured to rotate in the direction of the arrow in FIG. 14 according to the operation.

An alternating voltage is applied to the charging roller 18a which constitutes the charging means 18 for charging the photosensitive drum 17, and the charging roller 18a comes into contact with the photosensitive drum 17 and is driven to rotate. As a result, the surface of the photosensitive drum 17 is uniformly charged.

The exposure section 19 is an opening formed by the developing device 4 and the cleaning frame 24 and allowing image information from the optical system 10 to reach the surface of the photosensitive drum 17.

The developing means 20 contains a toner container 2 which accommodates toner (not shown) therein and forms a toner frame.
The developing device 4 rotatably supports the developing sleeve 20a as a developer carrying member. A toner layer thickness regulating member 20b made of rubber or the like is in contact with the developing sleeve 20a, so that the toner adhering to the surface of the developing sleeve 20a is adjusted to have a substantially uniform layer thickness, and the photosensitive drum 17 and the developing sleeve 20a. To the development area where they face each other. A developing sleeve gear 20 that meshes with a drum gear 17b provided at one end of the photosensitive drum 17 is provided at one longitudinal end of the developing sleeve 20a.
e (see FIG. 13) is provided, and the developing sleeve 20a is driven counterclockwise by the rotation of the photosensitive drum 17.
The toner in the toner container 2 is agitated to develop the developing sleeve 20a.
The toner stirring member 20c for sending to the side is connected to the photosensitive drum 17 by a gear train (not shown) and rotates clockwise with the rotation of the photosensitive drum 17.

An antenna 20d is arranged in parallel with the developing sleeve 20a, and when the process cartridge B is mounted in the image forming apparatus main body 25, the antenna 20d is provided.
d is connected to a toner detection circuit provided in the image forming apparatus main body 25. The toner detection circuit detects a change in electrostatic capacitance due to the presence / absence of toner between the antenna 20d and the developing sleeve 20a, and also detects whether or not the process cartridge B is attached to the image forming apparatus main body 25. .

The toner seal 3 for enclosing the toner in the toner container 2 prevents the toner from scattering during the transportation of the process cartridge B until the user reaches the process cartridge B. Must be removed when the image forming apparatus body 25 is mounted to form an image.

Toner seal 3 in the first embodiment
Is made of a flexible sheet-like material and is fixed to the opening 2a of the toner container 2 at the peripheral edge 2c by welding or the like.

The toner seal 3 will be described in detail later.

The drum shutter 27 is provided when the process cartridge B is not attached to the image forming apparatus main body 25.
It prevents the user from touching the photosensitive drum 17 by mistake or scratching the photosensitive drum 17,
A link 27a of a four-bar linkage is provided between a shield position that shields a portion of the photosensitive drum 17 facing the transfer unit 14 and a retracted position.
The cleaning frame 24 is movably supported by an end portion of the cleaning frame 24 in the longitudinal direction by 27b.

The cleaning means 21 is made of rubber or the like and comes into contact with the surface of the photosensitive drum 17 to scrape off the residual toner on the photosensitive drum 17.
1a and a waste toner reservoir 21b for accommodating scraped waste toner.

{Construction of Automatic Toner Seal Opening Device} Now, the toner seal 3 and its surroundings will be described in detail. 3 and 13 show the opening 2a of the toner container 2.
Shows a state in which the toner is sealed with the toner seal 3. Toner seal 3
Has a length more than twice the longitudinal dimension of the opening 2a and is made up of a cover film 3a for sealing the opening 2a of the toner container 2 and a tear tape 3b for tearing the cover film 3a. . The cover film 3a is fixed to the peripheral portion 2c of the opening 2a by a heat seal 2b. As shown in FIG. 3, the tear tape 3b laminated on the cover film 3a is heat-sealed to the toner frame 2 together with the cover film 3a at the portions called boat-shaped heat seal portions 6 on both sides in the longitudinal direction. The tear tape 3b is folded back on the back side of the cover film 3a opposite to the direction of the arrow Y1 that pulls out the toner seal 3.
b is drawn out from a toner seal outlet 28 of a clearance provided on the mating surface where the toner container 2 and the developing device 4 are joined, and is wound around an idler roller 29 of a vertical shaft rotatably supported by the toner container 2. The end portion is fixed to the take-up shaft 1a rotatably supported by the toner frame 2 by adhesion or the like.

The winding shaft 1a is connected by a gear train G to a winding sleeve gear 5g fixed on the opposite side of the developing sleeve 20a from the developing sleeve gear 20e. Gear train G
As shown in FIGS. 3 and 13, the winding gear 5g fixed to the developing sleeve 20a and the intermediate gear 5f rotatably supported by the gear box cover 41 (see FIG. 1) fixed to the toner container 2 respectively. , 5e, 5d, 5c, intermediate gear 5c
Bevel gear 5b integrated with the bevel gear 5a fixed to the winding shaft 1a
It is established by meshing in the order of.

The drum gear 17b is a drive gear 30 connected to a drive source provided in the image forming apparatus main body 25 when the process cartridge B is attached to the image forming apparatus main body 25.
It is a driven gear that meshes with.

The idler roller 29 and the winding shaft 1 described above
a is a gear box portion 2 integrated with the toner container 2 as shown in FIG.
The lower end is rotatably supported by e and the upper end is the gear box 2e.
It is rotatably supported by a cover bracket 2f fixed to. However, the upper end of the winding shaft 1a is
The boss of the bevel gear 5a press-fitted in a is covered with the bracket 2
It is rotatably fitted in f.

The gear box 2e and the cover bracket 2f
2 has the same plane parallel to the paper surface of FIG. 2, and the gear box cover 41 which is in close contact with this plane of the gear box portion 2e and the cover bracket 2f and covers the gear train G is fixed to the toner container 2. There is.

In the above description, the cross section of the winding shaft 1a at right angles to the axis is elliptical as shown in FIG. 1, and the journal portions 1a1 and 1a2 (the journal portion 1a2 is the boss of the concentric bevel gear 5a) at both ends thereof are elliptical. The center is the centroid 1a3. In the unopened state of the toner seal 3, the tear tape 3b of the toner seal 3 is in a stretched state and the idler roller 2
9 is wound around the winding shaft 1a in the vicinity of the position of the minor axis of the winding shaft 1a so as to be in contact with the winding shaft 1a so as to form an elliptic tangent line, and the end is fixed to the winding shaft 1a with an adhesive.

When the process cartridge B is mounted in the image forming apparatus main body 25, when the power switch is turned on in the image forming apparatus C, or when the image forming apparatus C is started, the drive source (not (Shown) is driven, and the rotational force transmitted from this drive source to the drive gear 30 is the drive gear 30 → drum gear 17b → developing sleeve gear 2
0e → developing sleeve 20a → winding sleeve gear 5g →
It is transmitted to the winding shaft 1a through the gear train G, and the winding shaft 1a
When a starts to rotate, the toner seal 3 is wound around the winding shaft 1a, and the toner seal 3 is peeled from the toner container 2 from the back side in the longitudinal direction. The boat-shaped heat seal portion 6 increases the peeling force of the toner seal 3 as shown in a of FIG. 5 (A). Here, the boat-shaped heat-sealed portion 6 begins to peel off, and peels off as shown in FIG. 4 (1) to (2). As the winding progresses, there is no effect of the boat-shaped heat-sealing portion 6 after the boat-shaped heat-sealing portion 6 is peeled off, so the peeling force is as shown in FIG.
The toner seal 3 is unsealed in this state, and the peeling force is again released from c in FIG. 5A to peel off the remaining boat-shaped heat seal portion 6 before the completion of winding. It increases as shown in d.

FIG. 2 is a side view of the developing device unit A in which the toner container 2 and the developing device 4 of the process cartridge according to the present invention are combined, and FIG. 1 is a horizontal cross-sectional view of the winding device taken along the line AA of FIG. It is a figure. FIG. 3 is a front view of the toner container 2 and the toner seal 3 connected to the elliptical winding shaft 1a. FIG. 4 (a) shows a conventional cylindrical winding shaft 1c, and FIGS. 4 (1) to 4 (3) are schematic views showing a state of opening a toner seal when the elliptical winding shaft 1a of the present invention is used. It is a figure. In the first embodiment, the take-up shaft 1a rotates in the direction of the arrow Y at a constant rotation speed, and the toner seal 3 has the arrow Y.
Suppose it is pulled in the direction of 1.

In FIG. 5A, the seal winding length L is plotted along the horizontal axis.
6 is a graph in which (total length) is taken, and a vertical axis represents a pulling force (peeling force) F for pulling the tear tape 3b in the Y1 direction along the cover film 3a to remove the toner seal 3.

FIG. 5B shows the winding torque applied to the winding shaft 1a when the seal winding length L is set on the horizontal axis and the seal motor is driven directly or indirectly by a torque motor having a constant rotation speed. The vertical axis is T. In the figure, the conventional cylindrical winding shaft 1c is shown by a broken line, and the elliptical winding shaft 1a of the first embodiment is shown by a solid line.
And (1) to (3) correspond to the numbers (a) and (1) to (3) representing the respective states in FIG.

FIG. 5C shows the seal winding length L on the horizontal axis.
Is a graph in which the vertical axis represents the winding speed v. In the drawing, the conventional cylindrical winding shaft 1c is shown by a broken line, and the elliptical winding shaft 1a of the first embodiment is shown by a solid line.
(A) and (1) to (3) in FIG. 5C correspond to the symbols (a) and (1) to (3) representing the respective states in FIG.

In the first embodiment, the toner seal 3 is formed from the cover film 3a and the tear tape 3b so that the opening and the bottom of the opening formed when the toner seal 3 is pulled in the direction of the arrow Y1 in FIG. And the configuration
The tear tape 3b is arranged on the developing device 4 side, and the cover film 3
a is attached to the toner container 2, and a part of the cover film 3a and the tear tape 3b is attached to the rectangular opening 2a of the toner container 2.
A heat seal 2b is formed along the above. As described above, the tear tape 3b is detachably fixed to the peripheral portion of the toner container 2 by the boat-shaped heat seal portion 6 together with both sides of FIG. 3 and the cover film 2a, and folded back to the right side on the left side of FIG. is there.

The end of the tear tape 3b folded back at the left end of the cover film 3a is attached to the elliptical winding shaft 1a. In the first embodiment, the elliptical take-up shaft 1a uses the gear train G to form the components of the process cartridge B (in this case, the developing sleeve 20a (see FIG. 13) has the take-up sleeve gear 5g). Driven by a drive source (not shown) external to the process cartridge B via the drive cartridge, the drive shaft inside or outside the process cartridge B has a winding shaft 1a. The take-up shaft 1a may be directly fitted. Further, the take-up shaft 1a is the process cartridge B.
It is also possible to have a structure which is outside the device and in which the tear tape 3b and the winding shaft 1a are fitted to each other when the process cartridge B is attached to the image forming apparatus main body 25.

When the elliptical winding shaft 1a, to which the drive is transmitted from the driving source (not shown), starts to rotate in the direction of the arrow Y in FIG. 4, the elliptical winding shaft 1c becomes as shown in FIG. 4 (1). The winding torque is an elliptical shape with a short diameter 1a4 of the diameter d of the conventional cylindrical winding shaft 1c drawn by a broken line. Therefore, the winding torque is the peeling force Fm of FIG. 5 (A) and the radius of the winding shaft 1a. It will be multiplied by. Therefore, as shown in (1) of FIG. 5 (B), the maximum value of the winding torque T appears at the same level as in the conventional case drawn by the broken line (a) at the initial and final windings when the ship-shaped heat seal 6 is peeled off. In the process, the winding torque T becomes higher than the conventional value and lower than the maximum value, and periodically changes from (2) to (3) in FIG. 5B during the winding. That is, as a whole, the winding torque T is the same as that of the conventional one (the maximum value does not change, and only during the process, the value is increased within the maximum value from the conventional value). Then, before winding, as shown in FIG. 4A, if the major axis 1a5 of the elliptical winding shaft 1a is positioned in parallel with the pulling-out direction of the toner seal 3, the boat-shaped heat-sealing portion 6 at the initial stage of winding is adjusted. When peeling off, it is possible to generate a torque on the winding shaft 1a, which is about the same as the conventional torque required to peel off the boat-shaped heat seal portion 6. Furthermore, by setting the distance between the two boat-shaped heat-sealing portions 6 to be an integral multiple of the circumference of the ellipse, even when the boat-shaped heat-sealing portion 6 at the final stage of winding is peeled off, a torque equivalent to the initial torque is applied to the winding shaft 1a. Can be generated.

On the other hand, the winding speed v of the toner seal 3 is
When the boat-shaped heat seal portion 6 is peeled off at the portion of the minor axis 1a4 of the elliptical winding shaft 1a (early and final winding),
It becomes the conventional level drawn by the broken line (a) of (C), and the winding radius becomes large and the peeling force is small in the middle of the process, so that the winding can be advanced faster than the winding with the short diameter 1a4. . Further, since the radius of the winding shaft 1a changes periodically, the winding speed also changes periodically ((2) →
It changes to (3)). Therefore, the winding speed v is increased as a whole, and the winding time can be shortened as compared with the conventional case.

Even if the winding shaft is the cylindrical winding shaft 1c as shown in FIG. 8, for example, bevel gears 5a, 5 in the gear train G are used.
The pair b is changed to a pair of circular gears 5a 'and 5b' (pitch diameters d1 and d2) of FIG. 8A, and the elliptical gear 5a having a major diameter d1 and a minor diameter d2 as shown in FIG. 8B. Elliptical gear 5b
If the configuration is such that the broken line in FIG. 8 (b) is converted to the original diameter of the gear in FIG. 8 (a) and the cylindrical winding shaft 1c is coaxially attached to the elliptical gear 5a, the elliptical gears 5a and 5b are Since the radius at the meshing pitch point (meshing pitch radius) varies (the state of rotation is shown in FIGS. 9C and 9D), when torque is input to the elliptical gear 5b at a constant rotation speed. , The output torque of the elliptical gear 5a is (meshing pitch radius of elliptical gear 5a 1/2 (d1) / meshing pitch radius of elliptical gear 5b 1/2 (d2) x (input torque T). As in the case of the elliptical winding shaft 1a, the winding torque fluctuates periodically as shown by the solid line in contrast to the conventional example shown by the broken line (a) in Fig. 9 (f). By setting the diameter of the circular gear pair to be short or long, the maximum value can be made the same as before, and The elliptical gear 5a before winding the reel 3
By adjusting the meshing position of 5b such that the major axis of the elliptical gear 5a is parallel to the seal pulling direction, the maximum torque required to peel off the boat-shaped heat seal portion 6 is generated just at the beginning or the end of the winding. You can On the other hand, since the winding torque T is periodically higher than the conventional value and fluctuates within the maximum value of the conventional value, the winding speed v is increased by the increased torque. Therefore, as a whole, the seal winding time can be shortened. (Embodiment 2) FIG. 6 is a view showing a winding state when a cylindrical winding shaft 1b is attached to a bevel gear 5a with its rotation center 1b1 being eccentric. In this case, winding shaft 1
When the diameter of b is the same as that of the conventional example, the length from the rotation center 1b1 to the toner seal 3 to the heat seal 3 is the length from the rotation center 1b1 to the leg 1b2 of the perpendicular, that is, the winding radius r. May be longer or shorter. Therefore, the winding torque T is obtained by multiplying the peeling force F of FIG. 7 (A) by the winding radius r, and FIG. 7 (B).
As in (1) and (5), the same maximum value as in the prior art appears in the initial and final stages of winding, and in the course of the process, it periodically fluctuates at a value lower than the maximum value and the torque increases as a whole. Before the winding, if the position of the winding shaft 1b is the winding radius r = the radius d / 2 of the winding shaft 1c of the conventional example as shown in FIG. 6 (1), then the position is shown in (1) of FIG. 7 (B). As shown in Fig. 6 (2), a high torque is generated just when the boat-shaped heat seal part 6 is peeled off.
In the middle of the process shown in (3), (2) and (3) in FIG.
As shown in (4), the torque can be suppressed lower than that. In addition, by setting the distance between the two boat-shaped heat seal portions 6 to a length that is an integral multiple of the length of the circumference of the winding shaft 1b,
Even when peeling off the boat-shaped heat seal part 6 at the end of winding,
As shown in (5) of FIG. 7 (B), almost the same torque as in the conventional example can be generated in the winding shaft 1b. Further, the winding speed starts from (1) in FIG. 7 (C) (2).
(3) Periodically fluctuates as in (4), and a part of the conventional winding speed is as shown in (4) of FIG. 7 (C).
Although it is slower than (a) of (a), it can be faster than the conventional winding speed (a) as a whole.

On the other hand, similar to the case where the elliptical gear pair is used in place of the elliptical winding shaft 1a in the first embodiment, FIG.
Instead of using the cylindrical eccentric winding shaft 1b of FIG.
Eccentric gears 5a and 5b obtained by eccentricizing the circular gear of FIG. 10B from the conventional type of FIG. 10A are used (rotational states are shown in FIGS. 11D, 11E, and 12F, and FIG. The cylindrical winding shaft 1c can be connected to the eccentric gear 5a with the center of the winding shaft 1c as the center of rotation.
In this case as well, the radius of the meshing pitch point between the eccentric gears 5a and 5b fluctuates, so that the winding torque T is as shown by the solid line in the conventional example shown by the broken line (a) in FIG. It fluctuates periodically. Also, depending on the adjustment of the gear train G, the maximum value of the winding torque T is made the same as the conventional value, and a force that periodically changes below that is applied to the winding shaft 1c, and the boat-shaped heat seal is just at the beginning or the end of the winding. It is possible to generate the maximum torque required to peel off the part 6. On the other hand, similar to the elliptical gear, the winding speed is increased by the torque increase, and the winding time can be shortened as a whole.

In the above description of each embodiment, it was explained that the boat-shaped heat seal portion 6 after the toner seal 3 was opened was peeled off, but immediately after the opening 2a is completely opened, the intermediate gear 5e of the gear train G is removed. The boat-shaped heat seal portion 6 after opening the toner seal 3 may be made difficult to peel off so that the drive to the elliptical winding shaft 1a is stopped by moving the toner seal 3 in the axial direction.

In this way, since it is not necessary to peel off the last boat-shaped heat seal portion 6, the winding shaft 1a stops at this point, and the torque is 0 as indicated by c to c'in FIG. 5 (A). Become.

In the embodiment, the winding speed of the toner seal is made variable by the winding shaft. The winding shaft has an elliptical cross section, an eccentric circle, and a uniform width strain circle (so-called rice ball shape). It may have a pincushion shape or a triangular or quadrangular cross section that rotates by equidistantly distributing a circumference and disposing a rod at the generatrix position. Further, an elliptical gear or an eccentric gear is used as the one in which the take-up shaft has a cylindrical shape and the drive force transmitting member from the drive source to the take-up shaft is provided with the speed changing means whose rotation speed changes periodically, but the present invention is not limited to these. However, the gear may be any gear whose radius at the meshing pitch point changes depending on the rotation angle. Furthermore, a toothed belt may be wound around the pair of deformed toothed pulleys. In this case, an eccentric pulley is suitable like the above-mentioned eccentric gear.

[0066]

According to the first invention of the present application, a deformed rotary member is used as a winding shaft or a transmission member for transmitting drive to the winding shaft, and the deformed rotary member has a toner seal for a rotation angle. The maximum value of the winding torque can be obtained by using the toner seal automatic winding device having a shape in which the moving length of the toner seal or the moving length of the peripheral surface of the deformed rotary member in the engaging portion of the pair of transmission members changes. Is the same as the conventional one, it is possible to generate a winding torque that cyclically fluctuates and the torque is increased overall, and when peeling off the maximum part of the peeling force of the toner seal, generate a winding torque equivalent to the conventional one. Since it is possible to wind, the winding time can be faster than in the past, and the winding time can be shortened.

In a second invention according to the present application, in the first invention, the deformed rotary member has an elliptical outer circumference with the centroid as the center of rotation, so that a smooth periodic torque fluctuation can be obtained. .

The third invention according to the present application is the first or second invention.
In the invention described above, the toner seal is affixed to the peripheral edge of the opening portion at a peeling start portion at one end of the opening portion of the toner container and a peeling end portion at the other end portion of the opening portion, which is stronger than other portions. Since the circumference of the take-up shaft is an integral fraction of the interval between the peeling start and the peeling end of the toner seal with respect to the opening, the toner seal is strongly attached at two places. The toner seal can be suitably peeled without increasing the torque at the end of peeling, when the peeled portion needs to be peeled.

A fourth invention according to the present application is a process cartridge equipped with a toner seal automatic winding device,
The toner seal automatic winding device uses a deformed rotary member as a take-up shaft or a transmitting member for transmitting drive to the take-up shaft. The deformed rotary member has a moving length of the toner seal with respect to a rotation angle or a pair of transmitting members. The toner seal is quickly opened after the process cartridge is mounted in the image forming apparatus main body by having the shape in which the ratio of the moving length of the peripheral surface of the odd-shaped rotating member in the engaging portion changes.

A fifth invention according to the present application is the same as the fourth invention, wherein the charging means, the cleaning means, the developing means and the electrophotographic photosensitive member are integrally formed into a cartridge, and the cartridge is attached to the main body of the image forming apparatus. A process cartridge which can be detached by means of a cartridge, and a sixth invention is the same as the fourth invention, wherein at least one of the charging means and the cleaning means, the developing means and the electrophotographic photosensitive member are integrally made into a cartridge, and this cartridge is used for image formation. It is suitable to be applied to a process cartridge that can be attached to and detached from the apparatus main body.

A seventh invention according to the present application is an image forming apparatus which detachably mounts a process cartridge and which forms an image on a recording medium, comprising: a, an electrophotographic photosensitive member, and a developing means. The means includes a toner frame that contains a developer and has an opening, a toner seal that seals the opening of the toner frame, a developing frame that supports the developing frame and is joined to the toner frame, and a toner seal. A toner seal automatic winding device provided with a winding shaft, wherein the toner seal automatic winding device uses a deformed rotating member as a winding shaft or a transmission member for transmitting drive to the winding shaft. The rotating member has a peripheral surface shape in which a moving length of the toner seal with respect to a rotational angle or a ratio of a moving length of the peripheral surface of the deformed rotating member at an engaging portion of a pair of transmission members changes; b. recoding media By using the electrophotographic image forming apparatus having the conveying means for conveying and the drive source of the toner seal automatic winding device, the opening time of the toner seal can be shortened without increasing the output torque of the drive source. Therefore, the time from the mounting of the process cartridge to the start of image formation can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing a developing unit according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the winding device of FIG.

FIG. 3 is a partial front view of the toner container according to the first embodiment of the present invention.

4 (1), (2), and (3) are schematic views showing the opening of the toner seal when the elliptical winding shaft according to the first embodiment of the present invention is used, and FIG. It is a schematic diagram of a prior art example.

FIG. 5 shows the relationship between the seal winding length, (A) peeling force, (B) torque acting on the winding shaft, and (C) speed in opening the toner seal according to the first embodiment of the present invention. It is a diagram.

6 (1), (2), (3), and (4) are schematic views showing a state of opening a toner seal according to the second embodiment of the present invention.

FIG. 7 shows the relationship between the seal winding length, (A) peeling force, (B) torque acting on the winding shaft, and (C) speed in opening the toner seal according to the second embodiment of the present invention. It is a diagram.

8 (b) and 8 (c) are explanatory views when the elliptical gear according to the first embodiment of the present invention is used, and FIG. 8 (b) is a plan view,
(C) is a side view of (b), and (a) is a plan view of a conventional example.

9 (c) and 9 (d) are plan views showing the operation of FIG.
(F) is a diagram showing the relationship between the winding length of the toner seal and the winding torque.

10A and 10B are explanatory views when a circular eccentric gear according to Embodiment 3 of the present invention is used, FIG. 10B is a plan view, FIG. 10C is a side view of FIG. 10B, and FIG. FIG.

11 (d), (e) and (f) are plan views showing the operation of FIG. 10 (b).

12 (g) is a plan view showing the operation of FIG. 10 (b),
(H) is a diagram showing the relationship between the winding length of the toner seal and the winding torque.

FIG. 13 is a perspective view of the automatic toner winding device.

FIG. 14 is a vertical sectional view of the image forming apparatus.

FIG. 15 is a vertical sectional view of a process cartridge.

FIG. 16 is a perspective view of a mounting unit of a process cartridge.

[Explanation of symbols]

1a ... Elliptical winding shaft 1a1, 1a2 ... Journal part 1a3 ... Centroid 1a4 ... Minor axis 1a5 ... Major axis 1b ...
Cylindrical eccentricity 1b1 ... Rotation center 1b2 ... Vertical leg 1
c ... Cylindrical winding shaft 2 ... Toner container 2a ... Opening 2b ... Heat seal
2c ... peripheral part 2e ... gear box part 2f ... cover bracket 3 ... toner seal 3a ... cover film 3b ... a tape 4 ... developing device 5a ... bevel gear, elliptical gear, eccentric gear 5b ... bevel gear, elliptical gear, eccentric gear 5a ' , 5b '... Circular gear 5c,
5d, 5e, 5f ... Intermediate gear 5g ... Winding sleeve gear 6 ... Boat heat seal part 10 ... Optical system 10a ... Optical unit 10b ... Polygon mirror 10c ... Scanner motor 10d ... Imaging lens 10e ... Reflection mirror 12 ... Recording material 13 ... Conveying means 13a ... Paper feed tray 13a1 ... Inner member 13a2 ... Outer member 13b ... Pickup roller 13c1, 13c2 ... Separation roller pair 13d1, 13d2 ... Registration roller pair
13e ... Intermediate discharge rollers 13f1, 13f2 ... Discharge roller pair 13g ... Guide member 13h ... Paper feed cassette
13i ... Pickup roller 13j ... Feeding roller 14 ... Transfer means 15 ... Fixing means 15a ... Drive roller 15b ... Fixing roller 16 ... Discharging section 17 ... Photosensitive drum 17a ... Drum shaft 17b ... Drum gear 18 ... Charging means 18a ... Charging roller 19 Exposure unit 20 Developing unit 20a Developing sleeve 20b Toner layer thickness regulating member 20c Toner stirring member 20d Antenna 20e Developing sleeve gear 21 Cleaning unit 21a Cleaning blade 21b Waste toner reservoir 23 Developing frame 24 ... cleaning frame 25 ... image forming apparatus main body 26 ... opening / closing member 27 ... drum shutter 27a, 27b ... link 28 ... toner seal outlet 29 ... idler roller 30 ... drive gear 31 ... gear box cover 35 ... cartridge mounting guide 35a ... First moth Doreru 35a1 ... groove 35b ... second guide rail 35c ... cylindrical projections 35
d ... Guide ridge 35e ... Engaging portion A ... Developing unit B ... Process cartridge C ... Image forming device d ... Diameter d1, d2 ... Pitch diameter F ... Peeling force G ... Gear train L ... Toner seal winding length r ... Radius T ... Winding torque v ... Winding speed Y, Y1 ... Arrow

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 25, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction item name] 0053

[Correction method] Change

[Correction contents]

FIG. 2 is a side view of the developing device unit A in which the toner container 2 and the developing device 4 of the process cartridge according to the present invention are combined, and FIG. 1 is a horizontal cross-sectional view of the winding device taken along the line AA of FIG. It is a figure. FIG. 3 is a front view of the toner container 2 and the toner seal 3 connected to the elliptical winding shaft 1a. FIG. 4 ( 4 ) shows a conventional cylindrical winding shaft 1c, and FIGS. 4 (1) to (3) show the elliptical winding shaft 1 of the present invention.
FIG. 6 is a schematic diagram showing a state of opening a toner seal when using a. In the first embodiment, it is assumed that the take-up shaft 1a rotates in the direction of arrow Y at a constant rotation speed and the toner seal 3 is pulled in the direction of arrow Y1.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction contents]

FIG. 5B shows the winding torque applied to the winding shaft 1a when the seal winding length L is set on the horizontal axis and the seal motor is driven directly or indirectly by a torque motor having a constant rotation speed. The vertical axis is T. In the figure, the conventional cylindrical winding shaft 1c is shown by a broken line, and the elliptical winding shaft 1a of the first embodiment is shown by a solid line.
And (1) to (3) correspond to the numbers ( 4 ) and (1) to (3) representing the respective states in FIG.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction contents]

FIG. 5C shows the seal winding length L on the horizontal axis.
Is a graph in which the vertical axis represents the winding speed v. In the drawing, the conventional cylindrical winding shaft 1c is shown by a broken line, and the elliptical winding shaft 1a of the first embodiment is shown by a solid line.
(A) and (1) to (3) in FIG. 5C correspond to the symbols ( 4 ) and (1) to (3) representing the respective states in FIG.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction contents]

Even if the winding shaft is the cylindrical winding shaft 1c as shown in FIG. 8, for example, bevel gears 5a, 5 in the gear train G are used.
The pair b is changed to a pair of circular gears 5a 'and 5b' (pitch diameters d1 and d2) of FIG. 8A, and the elliptical gear 5a having a major diameter d1 and a minor diameter d2 as shown in FIG. 8B. Elliptical gear 5b
If the configuration is such that the broken line in FIG. 8 (b) is converted to the original diameter of the gear in FIG. 8 (a) and the cylindrical winding shaft 1c is coaxially attached to the elliptical gear 5a, the elliptical gears 5a and 5b are Since the radius at the meshing pitch point (meshing pitch radius) varies (the state of rotation is shown in FIGS. 9C and 9D), when torque is input to the elliptical gear 5b at a constant rotation speed. , The output torque of the elliptical gear 5a is (meshing pitch radius of elliptical gear 5a 1/2 (d1) / meshing pitch radius of elliptical gear 5b 1/2 (d2) x (input torque T). As in the case of the elliptical winding shaft 1a, the winding torque fluctuates periodically as shown by the solid line in contrast to the conventional example shown by the broken line (a) in Fig. 9 ( e ). By setting the diameter of the pair of circular gears to be short or long, the maximum value can be made the same as before. Elliptic gears 5a and Lumpur 3 before winding,
By adjusting the meshing position of 5b so that the major axis of the elliptical gear 5a is parallel to the seal pulling direction, the maximum torque required to peel off the boat-shaped heat-sealing portion 6 is generated just at the beginning or the end of the winding. You can On the other hand, since the winding torque T is periodically higher than the conventional value and fluctuates within the maximum value of the conventional value, the winding speed v is increased by the increased torque. Therefore, as a whole, the seal winding time can be shortened.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing a developing unit according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the winding device of FIG.

FIG. 3 is a partial front view of the toner container according to the first embodiment of the present invention.

4 (1), (2), and (3) are schematic views showing a toner seal opening state when the elliptical winding shaft according to the first embodiment of the present invention is used, and ( 4 ) is It is a schematic diagram of a prior art example.

FIG. 5 shows the relationship between the seal winding length, (A) peeling force, (B) torque acting on the winding shaft, and (C) speed in opening the toner seal according to the first embodiment of the present invention. It is a diagram.

6 (1), (2), (3), and (4) are schematic views showing a state of opening a toner seal according to the second embodiment of the present invention.

FIG. 7 shows the relationship between the seal winding length, (A) peeling force, (B) torque acting on the winding shaft, and (C) speed in opening the toner seal according to the second embodiment of the present invention. It is a diagram.

8 (b) and 8 (c) are explanatory views when the elliptical gear according to the first embodiment of the present invention is used, and FIG. 8 (b) is a plan view,
(C) is a side view of (b), and (a) is a plan view of a conventional example.

9 (c) and 9 (d) are plan views showing the operation of FIG.
( E ) is a diagram showing the relationship between the winding length of the toner seal and the winding torque.

10A and 10B are explanatory views when a circular eccentric gear according to Embodiment 3 of the present invention is used, FIG. 10B is a plan view, FIG. 10C is a side view of FIG. 10B, and FIG. FIG.

11 (d), (e) and (f) are plan views showing the operation of FIG. 10 (b).

12 (g) is a plan view showing the operation of FIG. 10 (b),
(H) is a diagram showing the relationship between the winding length of the toner seal and the winding torque.

FIG. 13 is a perspective view of the automatic toner winding device.

FIG. 14 is a vertical sectional view of the image forming apparatus.

FIG. 15 is a vertical sectional view of a process cartridge.

FIG. 16 is a perspective view of a mounting unit of a process cartridge.

[Explanation of Codes] 1a ... Elliptical winding shaft 1a1, 1a2 ... Journal part 1a3 ... Centroid 1a4 ... Minor axis 1a5 ... Major axis 1b ...
Cylindrical eccentricity 1b1 ... Rotation center 1b2 ... Vertical leg 1
c ... Cylindrical winding shaft 2 ... Toner container 2a ... Opening 2b ... Heat seal
2c ... peripheral part 2e ... gear box part 2f ... cover bracket 3 ... toner seal 3a ... cover film 3b ... a tape 4 ... developing device 5a ... bevel gear, elliptical gear, eccentric gear 5b ... bevel gear, elliptical gear, eccentric gear 5a ' , 5b '... Circular gear 5c,
5d, 5e, 5f ... Intermediate gear 5g ... Winding sleeve gear 6 ... Boat heat seal part 10 ... Optical system 10a ... Optical unit 10b ... Polygon mirror 10c ... Scanner motor 10d ... Imaging lens 10e ... Reflection mirror 12 ... Recording material 13 ... Conveying means 13a ... Paper feed tray 13a1 ... Inner member 13a2 ... Outer member 13b ... Pickup roller 13c1, 13c2 ... Separation roller pair 13d1, 13d2 ... Registration roller pair
13e ... Intermediate discharge rollers 13f1, 13f2 ... Discharge roller pair 13g ... Guide member 13h ... Paper feed cassette
13i ... Pickup roller 13j ... Feeding roller 14 ... Transfer means 15 ... Fixing means 15a ... Drive roller 15b ... Fixing roller 16 ... Discharging section 17 ... Photosensitive drum 17a ... Drum shaft 17b ... Drum gear 18 ... Charging means 18a ... Charging roller 19 Exposure unit 20 Developing unit 20a Developing sleeve 20b Toner layer thickness regulating member 20c Toner stirring member 20d Antenna 20e Developing sleeve gear 21 Cleaning unit 21a Cleaning blade 21b Waste toner reservoir 23 Developing frame 24 ... cleaning frame 25 ... image forming apparatus body 26 ... opening / closing member 27 ... drum shutter 27a, 27b ... link 28 ... toner seal outlet 29 ... idler roller 30 ... drive gear 31 ... gear box cover 35 ... cartridge mounting guide 35a ... First moth Doreru 35a1 ... groove 35b ... second guide rail 35c ... cylindrical projections 35
d ... Guide ridge 35e ... Engaging portion A ... Developing unit B ... Process cartridge C ... Image forming device d ... Diameter d1, d2 ... Pitch diameter F ... Peeling force G ... Gear train L ... Toner seal winding length r ... Radius T ... Winding torque v ... Winding speed Y, Y1 ... Arrow

[Procedure correction 6]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction contents]

[Figure 9]

Claims (7)

[Claims] 1. A toner frame body containing a developer and having an opening, a toner seal for sealing the opening of the toner frame body, a developing frame body supporting a developing member and joined to the toner frame body,
In a toner seal automatic winding device having a toner seal winding shaft for opening the toner seal of the developing means in the electrophotographic image forming apparatus having, a winding shaft, or a transmission member for transmitting drive to the winding shaft,
A deformed rotary member is used, and the deformed rotary member has a shape in which the ratio of the moving length of the toner seal to the rotation angle or the moving length of the peripheral surface of the deformable rotary member at the engaging portion of the pair of transmission members changes. Toner seal automatic take-up device. 2. The toner seal automatic winding device according to claim 1, wherein the irregularly shaped rotating member has an elliptical outer periphery having a centroid as a center of rotation. 3. The toner seal is such that a peeling start portion at one end of the opening of the toner frame and a peeling end portion at the other end of the opening are attached to the peripheral edge of the opening stronger than other portions. 3. The toner seal automatic winding device according to claim 1, wherein the circumference of the winding shaft is an integer fraction of a distance between the peeling start and the peeling end of the toner seal with respect to the opening. . 4. A process cartridge attachable to and detachable from a main body of an image forming apparatus, comprising: an electrophotographic photosensitive member; and a developing unit, wherein the developing unit contains a developer and a toner frame body having an opening. A toner seal that seals the opening of the toner frame,
A developing frame body supporting the developing frame body and joined to the toner frame body;
A toner seal automatic winding device having a toner seal winding shaft is provided, and this toner seal automatic winding device uses a deformed rotating member as a winding shaft or a transmission member for transmitting drive to the winding shaft, The deformed rotary member has a shape in which the ratio of the moving length of the toner seal to the rotation angle or the moving length of the peripheral surface of the deformable rotary member at the engaging portion of the pair of transmission members changes. . 5. The process cartridge comprises a charging unit, a cleaning unit, a developing unit, and an electrophotographic photosensitive member that are integrally formed as a cartridge, and the cartridge can be attached to and detached from the main body of the image forming apparatus. The process cartridge described in 1. 6. The process cartridge comprises at least one of a charging unit, a cleaning unit, a developing unit and an electrophotographic photosensitive member integrally formed as a cartridge, and the cartridge can be attached to and detached from the main body of the image forming apparatus. 4. The process cartridge according to item 4. 7. An electrophotographic image forming apparatus for detachably attaching a process cartridge to form an image on a recording medium, comprising: a, an electrophotographic photosensitive member, and a developing means, wherein the developing means stores a developer. A toner frame that stores and has an opening, and a toner seal that seals the opening of the toner frame,
A developing frame member that supports the developing member and is joined to the toner frame member,
A toner seal automatic winding device having a toner seal winding shaft is provided, and this toner seal automatic winding device uses a deformed rotating member as a winding shaft or a transmission member for transmitting drive to the winding shaft, The deformed rotary member has a process cartridge having a peripheral surface shape in which a moving length of the toner seal with respect to a rotation angle or a ratio of a moving length of the peripheral surface of the deformable rotary member in an engaging portion of a pair of transmission members changes. An electrophotographic image forming apparatus comprising: a conveying unit configured to convey the recording medium; and a drive source of the toner seal automatic winding device.