JPH0734141B2 - Copier cleaning unit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rational attachment / detachment system of a cleaning unit and a main charger in a so-called wide industrial electrostatic copying machine.

[Prior art]

7 and 8 show such an industrial copying machine as described above. FIG. 7 is a schematic side view thereof, and FIG. 8 shows a part of the copying machine main body for maintenance and inspection of the cleaning unit. It is a schematic side view which shows the open state.

In the copying machine 1, the document is conveyed by the document feed rollers 2a and 2b, and the document image emitted by the light source 3 passes through the SELFOC lens 4 and is formed on the surface of the photosensitive drum 5. The surface of the photosensitive drum 5 is uniformly charged with positive charges by the main charger 6. Light corresponding to the original image that has passed through the SELFOC lens 4 is applied to this positive charge. Then the charge in that part disappears,
A so-called electrostatic latent image is formed. When the photosensitive drum 5 rotates, when the portion on which the electrostatic latent image is formed passes through the developing section 7, toner adheres to the electrostatic latent image and a toner image is formed.

On the other hand, the transfer paper supplied on the paper feed tray 8 reaches the feed roller 11 through the paper feed roller 9 and the registration roller 10. Further, when the transfer paper passes through the transfer portion 13 between the photosensitive drum 5 and the transfer charger 12, the toner image formed on the surface of the photosensitive drum 5 is transferred to the transfer paper.

The transfer paper onto which the toner image has been transferred further passes through the fixing unit 14 and the toner image is fixed. After that, the transfer paper
Then, the sheet is discharged to the sheet discharge tray 16a.

The registration roller 10 in the above description is composed of an upper registration roller 10a and a lower registration roller 10b. Further, the feed roller 11 is the upper feed roller 11a.
And a lower feed roller 11b.

Further, in the vicinity of the outer peripheral portion of the photosensitive drum 5, a cleaning unit 16 for cleaning the photosensitive drum 5 by scraping off the residual toner adhering to the outer surface of the photosensitive drum 5 is provided.

In the conventional industrial copying machine 1 as described above, the cleaning unit 16 and the main charger 6 are separately attached to the copying machine body. Therefore, in order to perform maintenance and inspection of the cleaning unit 16 and the main charger 6, the main body of the copying machine is divided into a fixed portion 1a and a movable portion 1b at a portion indicated by a two-dot chain line 17. The movable part 1b can be moved to the position shown by the chain double-dashed line in FIG. By this movement, the cleaning unit 16 and the main charger 6
Is exposed to the outside and can be taken out.

That is, in the industrial copying machine recently developed, the main charger 6 is integrally attached to the cleaning unit 16 so that the cleaning unit 16 and the main charger 6 can be taken out of the machine together during maintenance and inspection. ing. Therefore, maintenance and inspection work can be performed in a wide area, and workability is improved.

[Problems to be Solved by the Invention]

However, since the cleaning cycle of the main charger 6 is short and the operation is relatively simple, the charger with the cleaning unit 16 is always taken out of the machine every time the main charger 6 is cleaned as described above. Doing so will rather reduce work efficiency.

On the other hand, the main charger 6 and the cleaning unit 16
For maintenance and inspection, it is desirable that the main charger 6 can be taken out of the machine together with the cleaning unit 16 as it is conventionally, so that the maintenance and inspection workability can be improved.

Therefore, according to the present invention, the main charger can be easily cleaned while the cleaning unit 16 is attached to the machine, and the main charger can be taken out of the machine while being integrally attached to the cleaning unit. The first purpose is to provide an effective mechanism.

When the main charger 6 is to be cleaned while the cleaning unit is mounted as described above, the main charger 6 is cleaned as shown in FIGS.
As shown in the figure, the case 6'of the main charger 6 is attached with its opening oriented in the axial direction of the photosensitive drum 5, and therefore cannot be cleaned as it is.

Therefore, it is necessary to rotate the main charger 6 to direct the opening toward the outside. At that time, even if the main charger 6 is simply swung to open, the cover of the light source 3 or the like may be opened. Can not.

Therefore, a second object of the present invention is to provide a structure in which the main charger 6 can be opened without being interfered with other parts while being mounted in the copying machine.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the main means adopted by the present invention is that a part of the main body of the copying machine is moved in the direction perpendicular to the axis of the photosensitive drum so that it is provided in the part of the photosensitive drum and its vicinity. In a copying machine with a cleaning unit that can be exposed, a shaft that is attached to the cleaning unit and that is slidable and rotatable in the longitudinal direction of the cleaning unit, and that is rotatable about the shaft. The main charger, a biasing means for constantly biasing the shaft in one direction in the longitudinal direction of the cleaning unit, and a shaft positioning means for setting the contact position of the shaft by the biasing means in two steps. When the shaft is positioned at one of the contact positions, both ends of the shaft engage, and when positioned at the other contact position, the ends of the shaft disengage. A shaft engaging / disengaging means, and a connector means attached to one end of the main charger, which is inserted into a socket on the main body of the copying machine to fix the main charger when the main charger is positioned at the former contact position together with the shaft. The cleaning unit of a copying machine is characterized in that

〔Example〕

Subsequently, an embodiment of the present invention will be described with reference to FIGS. 1 to 6 to provide an understanding of the present invention. 1 (a) and 1 (b) are side views showing the operation of the cleaning unit according to the embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are the cleaning unit with respect to the main body of the copying machine. FIG. 3 is a perspective view showing a mounting operation state of the cleaning unit, and FIG. 4A and FIG. 4B are mounting side views of the main charger. FIGS. 5 (a) and 5 (b) are plan views of the engagement portion showing the engagement operation of the main charger, and FIGS. 6 (a) and 6 (b) are rotation diagrams of the main charger. It is a side view for demonstrating the structure of a dynamic center part.

The following examples are merely examples embodying the present invention,
It does not limit the technical scope of the present invention.

As shown in FIG. 3, the cleaning unit 21 according to this embodiment includes side plates 23a and 23b that sandwich the cleaning unit body 22 from both sides. Notches 24, 24 for mounting the main charger 6 are formed on the side plates 23a, 23b.

Support holes 25a, 25b for supporting the shaft 25 slidably and rotatably in the longitudinal direction are formed in the side plates 23a, 23b. The main charger 6 is fixed to the tips of a pair of brackets 26a, 26b rotatably attached to the shaft 25. However, the brackets 26a and 26b cannot slide in the longitudinal direction of the shaft 25.

The main charger 6 can be integrally taken out together with the brackets 26a and 26b.

Further, 27a and 27b are a pair of grips to be gripped when the shaft 25 is slid. The grips 27a and 27b are provided on the cleaning unit main body so that the shaft 25 can slide in the longitudinal direction.
It is loosely fitted in guide grooves 29a, 29b formed in brackets 28a, 28b provided on 22.

The guide grooves 29a and 29b are shown in FIGS. 5 (a) and 5 (b), respectively.
A series of long grooves 29a ′, 29b ′ and short grooves 29a ″, 29 as shown in FIG.
The long groove 29a '(29b') is formed longer than the short groove 29a "(29b"), and the shaft 25 has a handle 27a (2
7b) is longer than the groove 29a ″ (29b ″) fitted
The state fitted in (29b ') can slide more in the direction of arrow X in FIG. Fig. 4 (a) shows the handle 27a (27
b) is inserted into the long groove 29a '(29b') and is pushed to the deepest position. Further, FIG. 4 (b) shows a handle 27a.
(27b) is inserted into the short groove 29a "(29b") and is pushed to the deepest position.

Reference numeral 30 is a spring (biasing means) for elastically biasing the shaft 25 in the direction of arrow X in FIG.

In the body frame 1a ′, 1a ′ of the fixed portion 1a of the copying machine body,
Horizontal guide rails 31, 31 are formed as shown in FIGS. 1 and 3, respectively, and guide pieces for sliding contact with the guide rails 31, 31 are provided outside the side plates 23a, 23b. 32, 32 is stuck.

The side plates 23a, 2a are attached to the body frames 1a ', 1a'.
Guide grooves 34a, 34b of a substantially L-shape having a width d ₁ are formed to guide the support pin 33 projecting outward from 3b and support the support pin 33 at the innermost portion thereof.

The innermost part of the guide groove 34a (34b) is the support pin 33.
Is formed in a circular shape having an inner diameter slightly larger than the outer diameter D ₁ .
Further, a chamfer 33 'having a width smaller than the dimension d ₁ is formed at the end of the support pin 33.

The guide groove 34a (34b) is more become a back side of the horizontal portion and the inlet side of the inclined portion, the width of the horizontal portion is equal to the dimension d _1,
And the inclined portion, so as to obtain as a state in which portions is inclined in the chamfer 33 ', is set to increase D ₁ smaller width than d _1.

Further, as shown in FIG. 3, the shaft 25 slides in one direction on the main body frame 1a 'while the cleaning unit 21 is lifted until the guide piece 32 contacts the bearing 40 of the photosensitive drum 5. A supporting hole 41a into which the end 25 'of the shaft 25 is inserted when formed is formed.

Further, at the end portion on the opposite side of the shaft 25, a small diameter portion 42a and a large diameter portion 42b are formed as shown in FIGS. As shown in FIG. 3, a support hole 41b (see FIG. 6 (a)) into which the large diameter portion 42b can be inserted is formed in the body frame 1a '. A notch 41b 'opened obliquely downward is connected to the support hole 41b. The width of the notch 41b 'is set to be slightly wider than that of the small diameter portion 42a.

These support holes 41a, 41b constitute the shaft engaging / disengaging means in the present invention.

Next, a device for mounting the cleaning unit 21 and the main charger 6 described above on the main body of the copying machine will be described.

When the cleaning unit 21 is removed from the main body of the copying machine, the shaft 25 supported by the support holes 25a and 25b has grips 27a and 27b attached to the shaft 25 as shown in FIGS. 3 and 5 (b). As shown in FIGS. 3 and 4 (b), since the shaft 25 is attached to the short groove 29a ″ (29b ″) and the shaft 25 is pressed and biased by the spring 30 in the direction indicated by the arrow X, Has become.

In this state, the operator attaches the cleaning unit 21 having the main charger 6 to the movable portion 1b as shown in FIG.
It is installed in the opened copy machine 1. That is, the guide pieces 32, 32
And the support shafts 33, 33 are placed on the guide rails 31, 31 of the body frames 1a ', 1a', and the guide pieces 32, 32 and the support shaft 3
The cleaning unit 21 is supported by 3,33. In this state, the cleaning unit 21 is slid in the direction of arrow Y in FIG. Then, the support shafts 33, 33 are eventually inserted into the guide grooves 34a, 34b. As described above, since the chamfers 33 'shown in FIG. 2 are formed at the end portions of the support shafts 33, 33, the support shaft 33 is formed into the guide groove.
Guided by 34a and 34b, they smoothly reach the inner part. This state is shown in FIG. In this state, the main charger 6 is separated from the photosensitive drum 5 more than necessary, and the operator rotates the cleaning unit 21 in this position in the direction indicated by arrow Z in FIG. 1 (b).
This rotation is performed until the guide piece 32 comes into contact with the bearing 40 of the photosensitive drum 5, and the position where the guide piece 32 comes into contact with the bearing 40 is the proper mounting position of the cleaning unit 21. Further, at this position, the distance between the main charger 6 and the photosensitive drum 5 is also proper. However, the main charger 6 is set in the proper position only after being further slid in the direction perpendicular to the paper surface of FIG. 1 (b).

When the cleaning unit 21 is rotated to the state shown in FIG. 1 (b) as described above, the support shaft 33 is rotated to the state shown in FIG. 2 (b), and the support shaft 33 having the outer diameter D ₁ is rotated. Is the guide groove 34
The cleaning unit 21 cannot be taken out from this state because it cannot enter the inner part (dimension d ₁ ) of a (34b).

In this state, the operator slightly moves the shaft 25 in the direction opposite to the arrow X against the force of the spring 35. As a result, the grips 27a and 27b are disengaged from the engagement with the short grooves 29a ″ (29b ″). Therefore, by slightly rotating the shaft 25 in the clockwise direction in FIG. 1 (b), the grips 27a and 27b are moved to the short grooves 29a ″ (29
b ″) can be transferred to the long groove 29a ′ (29b ′) (FIG. 5 (a)). As a result, the handle 27a (27b) can be moved to the short groove 29.
The restriction by the a ″ (29b ″) is released, and the short groove is guided by the long groove 29a ′ (29b ′) in the direction of the arrow X in FIG.
It can slide deeper than the regulated position by 29a "(29b").

By this sliding of the shaft 25, the tip 25 'of the shaft 25 is inserted into the support hole 41a, and the large diameter portion 42 formed at the opposite end is formed.
The b is inserted into the support hole 41b, and the large diameter portion 42b cannot come out of the notch 41b '. Incidentally, FIG. 6 (a) shows this state, and FIG. 6 (b) shows that the small diameter portion 42a has a notch 41.
The state of being inserted into the support hole 41b through b'is shown.

In this way, the shaft 25 is mounted in the support holes 41a and 41b and is prevented from coming off.
It is fixed in the state shown in FIG. As a result of the shaft 25 sliding in the direction indicated by the arrow X as described above, the connector 6a (connector means) of the main charger 6 is inserted into a socket (not shown) on the main body of the copying machine, and the main charger 6 is also It is fixed at the position shown in FIG. 1 (b).

By following the steps opposite to the mounting operation described above, the cleaning unit 21 and the main charger 6 can be taken out of the machine as a unit, and the maintenance and inspection work of the cleaning unit 21 or the main charger 6 can be facilitated. .

Next, the operation of opening the main charger 6 for cleaning the main charger 6 with the main charger 6 still attached will be described.

First, the operator operates the handle 27a,
Hold shaft 27b and slide shaft 25 in the direction opposite to arrow X in FIG. As a result, the connector 6a of the main charger 6 is disengaged from the socket (not shown), and the tip 25 'of the shaft 25 is disengaged from the support hole 41a. Further, the large diameter portion 42b provided at the other end of the shaft 25 is disengaged from the support hole 41b, and instead, the small diameter portion 42b is
a is inserted into the support hole 41b (FIG. 6 (b)).

Therefore, the shaft 25 is disengaged from the support holes 41a and 41b,
The cleaning unit 21 is indicated by the arrow Z in FIG. 1 (b).
It becomes possible to rotate in the opposite direction. By this rotation, the guide piece 32 is separated from the bearing 40 and abuts on the guide rail 31, as shown in FIG. Due to such rotation of the cleaning unit 21, the main charger 6 is separated from other components such as the cover of the light source 3 shown in FIG. 7 and is in a state of not interfering with these other components. Therefore, in this state, the main charger 6 can be rotated about the shaft 25 to the position shown by the alternate long and short dash line in FIG. In this way, the opening of the main charger 6 faces upward, and the main charger 6 can be easily cleaned.

Further, in the operation of closing the main charger in the opened state as described above and reattaching the cleaning unit 21 to the main body of the copying machine, the above procedure may be reversed.

〔The invention's effect〕

As described above, according to the present invention, a part of the copying machine main body is moved in a direction perpendicular to the axis of the photosensitive drum, so that the cleaning unit provided in the photosensitive drum and a part thereof can be exposed. In a copying machine, a shaft attached to the cleaning unit, slidably and rotatably in the longitudinal direction of the cleaning unit, a main charger rotatably attached about the shaft, and A biasing means for constantly biasing the shaft in one longitudinal direction of the cleaning unit, a shaft positioning means for setting the contact position of the shaft by the biasing means in two stages, and one of the shafts for abutting. A shaft engaging / disengaging means that engages both ends of the shaft when positioned at a position, and disengages both ends of the shaft when positioned at the other contact position; A connector means is attached to one end of the charger, and when the main charger is positioned at the former contact position together with the shaft, the connector means is inserted into a socket on the main body of the copying machine and fixes the main charger. Since it has a cleaning unit mounting structure for a copying machine, the main charger needs to be mounted on the copying machine for cleaning the main charger, which must be performed relatively frequently. Provided is a device that can reasonably and efficiently remove and install the cleaning unit and the main charger as a unit for maintenance and inspection work.
It contributes to improving the efficiency of these cleaning, maintenance and inspection work.

In addition, after rotating the cleaning unit to separate the main charger from other parts, the main charger can be further rotated to direct the opening toward the outside for easy cleaning. At this time, the problem that the main charger interferes with another component and is difficult to operate is also solved.

[Brief description of drawings]

1 (a) and 1 (b) are side views showing the operation of the cleaning unit according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are the engagement of the cleaning unit with the main body of the copying machine. FIG. 3 is a side view of the main part of the engaging portion for explaining the operation, FIG. 3 is a perspective view showing the mounting operation state of the cleaning unit, and FIGS. 4 (a) and 4 (b) are for explaining the mounting operation of the main charger 5A, 5A and 5B are plan views of the engaging portion showing the engaging operation of the main charger, and FIGS. 6A and 6B are rotation center portions of the main charger, respectively. FIGS. 7 and 8 are schematic side views showing the state before and after opening the main body of the conventional industrial copying machine. [Description of symbols] 5 ... Photosensitive drum 6 ... Main charger 6a ... Connector (connector means) 21 ... Cleaning unit 25 ... Shaft 26a, 26b ... Bracket 27a, 27b ... Handle 29a, 29b ... Guide Grooves (shaft positioning means) 29a ', 29b' ... long grooves 29a ", 29b" ... short grooves 30 ... springs (biasing means) 41a, 41b ... support holes (shaft engaging / disengaging means) 34a, 34b ...... Guide groove 33 …… Support shaft.

Claims (1)

[Claims] 1. A copier in which a cleaning unit provided in a part of the photosensitive drum and in the vicinity thereof can be exposed by moving a part of the copier in a direction perpendicular to the axis of the photosensitive drum. A shaft attached to the unit, which is slidable and rotatable in the longitudinal direction of the cleaning unit; a main charger mounted so as to be rotatable about the shaft; Urging means for constantly urging in one direction in the longitudinal direction, axis positioning means for setting the contact position of the shaft by the urging means in two steps, and when the shaft is positioned at one contact position, One end of the main charger, wherein both ends of the shaft are engaged with each other, and when positioned at the other contact position, the engagement of both ends of the shaft is released. And a connector means for fixing the main charger by being inserted into a socket on the body side of the copying machine when the main charger is positioned at the former contact position together with the shaft. Machine cleaning unit mounting structure.