JPS6237392B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic copying apparatus, and more particularly, to an electrostatic copying apparatus that forms an electrostatic latent image corresponding to an image of an original on a photosensitive member,
This electrostatic latent image is then applied with toner to develop it into a toner image, and this toner image is then transferred to transfer paper, thus producing a copy having a copy image corresponding to the original image. The present invention relates to an electrostatographic copying apparatus.

Such a toner image transfer type electrostatic copying device generally includes a housing, a transparent plate attached to the top surface of the housing for placing an original to be copied, and a rotation axis extending in the front and back direction. a rotating drum rotatably mounted in a housing and having a photosensitive member on its surface; a rotating drum for forming an electrostatic latent image corresponding to an image of a document on the photosensitive member;
an electrostatic latent image forming means including an optical system that projects an image of an original onto the photosensitive member; a developing device that applies toner to the electrostatic latent image formed on the photosensitive member to develop it into a toner image; A transfer means for transferring the toner image formed on the transfer paper is provided.
Additionally, a cleaning device is often provided to remove toner remaining on the photosensitive member after transfer. However, regarding such a cleaning device, the above-mentioned developing device for applying toner to an electrostatic latent image formed on a photosensitive member and developing it into a toner image is used to remove toner remaining on the photosensitive member after transfer. It can also be omitted by having it also function as a cleaning device.

In the electrostatic copying apparatus of this type, the developer that is consumed in the developing device (generally, a two-component developer containing toner and a so-called carrier, or a one-component developer containing only magnetic toner is used). In order to be able to replenish the developer device with toner from the developer device as needed, and also to be able to repair or replace the developer device if necessary, the developer device is mounted in the housing. It is necessary to attach it to the body removably. Additionally, in order to be able to collect the toner collected by the cleaning device as necessary, and also to be able to repair or replace the cleaning device as necessary, the cleaning device It is necessary to attach the housing to the housing in a detachable manner. Furthermore, in order to enable the photosensitive member on the rotating drum to be replaced as necessary, the rotating drum must also be detachably attached to the housing.

Therefore, in the conventional electrostatic copying apparatus, the developing device, the cleaning device, and the rotating drum are individually and independently slidable relative to the housing in the front-rear direction (that is, in the axial direction of the rotating drum). It was attached so that it could be put on and taken off. However, there are important problems that need to be solved with such conventional electrostatographic apparatus. To be more specific, as is well known to those skilled in the art, in the electrostatic copying apparatus of the form described above, the relative positions of the developing device and the rotating drum or the cleaning device and It is important to precisely set the relative positions of the rotating drums. In particular, when the developing device or the cleaning device includes a developer holding member composed of a hollow cylindrical sleeve and a permanent magnet disposed within the cylindrical sleeve, the surface of the cylindrical sleeve and the rotation It is important to precisely set the distance to the surface of the drum (and therefore the surface of the photosensitive member on the rotating drum). In particular, when using a one-component developer containing only magnetic toner, it is important to set this interval extremely precisely to a predetermined size, which is generally 0.5 mm or smaller. It is. However, in conventional electrostatic copying machines,
As mentioned above, since the developing device, the cleaning device, and the rotating drum are each mounted separately and independently on the housing so as to be slidable in the front and rear directions, it is impossible or extremely difficult to set the above-mentioned spacing precisely. Have difficulty. That is, in order to slidably attach each of the developing device, cleaning device, and rotating drum to the housing, these three components are required.
Although it is necessary to provide the housing with a guide element such as a rail that slidably receives each of the three members, there is inevitably some gap between each of these three members and the respective guide element due to molding errors, etc. play is generated, and also a slight error in the parallelism between each guide element, making it impossible or extremely difficult to precisely set the above-mentioned spacing over the entire axial length of the rotating drum. Have difficulty. Therefore, with conventional electrostatic copying apparatuses, it is impossible or extremely difficult to obtain sufficiently satisfactory copied images. Furthermore, when one of the three components mentioned above is slid relative to the other in the front-rear direction (that is, in the axial direction of the rotating drum), the developing device or the cleaning device moves between the hollow cylindrical sleeve and this cylindrical sleeve. In the case of a type that includes a developer holding member made of a permanent magnet disposed in a cylindrical sleeve, the developer magnetically held on the surface of the cylindrical sleeve and the surface of the rotating drum may interact with each other. They interfere and have a negative impact on each other. Furthermore, it is extremely difficult to repair or replace the three members, especially adjusting the relative positions of the three members.

In view of this fact, as disclosed in Japanese Unexamined Patent Publication No. 51-2433, the developing device, cleaning device, and rotating drum are integrated into one replacement unit, and this unit is attached to the housing. It has been proposed that the unit be removably attached to the unit, and when any one of the three units needs repair or replacement, the entire unit, which is made up of all three units, can be replaced with a new unit. There is. By configuring the developing device, the cleaning device, and the rotary drum as one unit, the above-mentioned problems found in conventional electrostatic copying devices can be solved. However, in this case, even though the need for repair or replacement of the developing device, the cleaning device, and the rotating drum occurs separately, it is necessary to repair or replace any one of the three. When this occurs, all three components must be replaced with new ones, which poses a serious problem in that it is extremely disadvantageous from an economic standpoint. For example, if the rotating drum has a photosensitive member made of selenium, the quality of the copied image generally deteriorates after about 50,000 copying steps due to deterioration of the photosensitive member. Therefore, it is necessary to replace the photosensitive member, whereas the developing device or cleaning device is of a type that includes a developer holding member composed of a hollow cylindrical sleeve and a permanent magnet disposed within the cylindrical sleeve. If a one-component developer containing only magnetic toner is used, all that is required is to replenish or collect toner as necessary, and to perform simple cleaning or repairs in a timely manner. , the developing device or the cleaning device can be used semi-permanently without being replaced. On the other hand, although the developing device or the cleaning device includes a developer holding member composed of a hollow cylindrical sleeve and a permanent magnet disposed inside the cylindrical sleeve, the developer is a two-component developer containing toner and carrier. When using a system developer, the developing device or cleaning device must be disassembled for repair or repaired after approximately 10,000 copying operations due to reasons such as toner sticking to the carrier surface, wear or deterioration of the carrier, etc. It is necessary to replace it. In addition, if the cleaning device is of the so-called fur brush type, the cleaning function is generally degraded due to toner sticking to the tip of the fur brush, so the cleaning device is generally removed after approximately 20,000 copying processes have been performed. It is necessary to replace it. Furthermore, if the three parts of the developing device, the cleaning device, and the rotating drum are configured as one unit as described above, for example, if one of these three parts needs simple cleaning or repair (for example, the developing device or cleaning Such simple cleaning or repair cannot be easily performed, such as removing foreign matter when it has entered the equipment or cleaning when the surface of the rotating drum is contaminated. In some cases, it becomes necessary to replace the entire unit in which the above three components are integrated. Furthermore, when performing maintenance and inspection of an electrostatic copying device, for example, in order to check the function of the developing device, only the cleaning device is removed, and the supply of transfer paper is stopped, and the toner image before transfer is placed on the photosensitive member of the rotating drum. Although it may be desirable to create and inspect this, it becomes impossible to perform such an inspection operation. Furthermore,
If the transfer paper wraps around the rotating drum surface due to poor separation of the transfer paper from the rotating drum surface, remove the rotating drum or remove the developing device and/or cleaning device. Removal of the wrapped transfer paper is quite difficult because it is not possible to expose the entire or most of the rotating drum surface.

The present invention has been made in view of the above-mentioned facts, and its main purpose is
A new and excellent electrostatic copying device that solves the above-mentioned problems existing in conventional electrostatic copying devices without creating new problems like the electrostatic copying device disclosed in Publication No. 2433. It is to provide.

According to the present invention, there is provided a housing, a transparent plate mounted on the upper surface of the housing for placing an original to be copied, and a transparent plate mounted in the housing so as to be rotatable about a rotation axis extending in the front-rear direction. and an electrostatic drum including a rotating drum having a photosensitive member on its surface, and an optical system for projecting an image of the original onto the photosensitive member to form an electrostatic latent image corresponding to the image of the original on the photosensitive member. an electrolatent image forming means, a hollow cylindrical sleeve and a permanent member disposed within the hollow cylindrical sleeve for applying toner to the electrostatic latent image formed on the photosensitive member to develop it into a toner image; In an electrostatic copying apparatus, the housing includes a developing device including a developer holding member made of a magnet, and a transfer means for transferring the toner image formed on the photosensitive member to transfer paper. , a support is mounted to be slidable in the front-rear direction between an operating position in the housing and a pulled-out position pulled forward by a predetermined amount from the operating position, and the support is released to the operating position. Locking means for freely locking and stop means for preventing the support from being pulled out further forward beyond the pull-out position are provided, and the rotary drum and the developing device are attached to the support. and are attached separately and detachably,
There is provided an electrostatic copying apparatus characterized in that at least the developer holding member of the developing device is detachable in a direction substantially perpendicular to the front-rear direction.

Further, according to the present invention, there is provided a housing, a transparent plate attached to the upper surface of the housing for placing an original to be copied, and a transparent plate attached to the upper surface of the housing for placing an original to be copied. a rotating drum mounted on the drum and having a photosensitive member on its surface;
an electrostatic latent image forming means including an optical system for projecting an image of the original onto the photosensitive member for forming an electrostatic latent image corresponding to the image of the original on the photosensitive member; A developer holding member configured of a hollow cylindrical sleeve and a permanent magnet disposed within the hollow cylindrical sleeve, for applying toner to the electrostatic latent image formed on the electrostatic latent image to develop it into a toner image. a developing device, a transfer means for transferring the toner image formed on the photosensitive member to a transfer paper, a hollow cylindrical sleeve for removing toner remaining on the photosensitive member after transfer; An electrostatographic copying apparatus comprising: a cleaning device including a developer retaining member constituted by a permanent magnet disposed within a hollow cylindrical sleeve; A support body is mounted to be slidable in the front-rear direction between a pull-out position pulled out a predetermined amount forward, and a locking means for releasably locking the support body in the operating position; A stop means is provided to prevent the rotating drum from being pulled out further forward beyond the pulled-out position, and the rotating drum, the developing device, and the cleaning device can be individually and detachably attached to the support. At least the developer retaining member of the developing device and the developer retaining member of the cleaning device are detachable in a direction substantially perpendicular to the front-rear direction. An electronic copying device is provided.

In the electrostatic copying apparatus of the present invention, first of all, the support body is attached to the housing so as to be slidable in the front-rear direction between an operating position within the housing and a pulled-out position pulled forward from the operating position. installed,
A rotating drum and a developing device (and cleaning device) are attached to the support.
Therefore, in order to replenish toner to the developing device (or to collect toner from the cleaning device), the developing device (or cleaning device)
If it is necessary to withdraw the above-mentioned support from within the housing, the relative relationship between the rotary drum and the developer device (as well as the cleaning device) can be reduced by withdrawing the above-mentioned support from its working position in the housing to the withdrawn position. Pulling out the rotating drum and the developing device (as well as the cleaning device) as one unit without creating movement and damaging the spacing set to a predetermined value between them or causing negative effects due to mutual interference between them. This can be accomplished easily and quickly.

Second, the rotating drum and the developing device (as well as the cleaning device) are each independently and removably attached to a support that is attached to the housing so as to be slidable in the front-rear direction. Therefore, when the rotating drum or developing device (or cleaning device) needs to be repaired or replaced, the support body is first pulled out from the working position in the housing to the pulled-out position, and then the rotating drum or developing device (or cleaning device) is removed. Alternatively, by detaching the cleaning device) from the support, each can be detached separately and independently as necessary. In this regard, I would like to draw particular attention to the following facts. That is, in conventional electrostatic copying apparatuses, the rotating drum and developing device (and cleaning device) are each mounted separately and directly in the housing. In order to removably bond them to the housing, they generally need to be slidable in the front-rear direction (i.e., in the axial direction of the rotating drum), and therefore their relative relationship must be precisely set as described above. It is impossible or extremely difficult to do so. On the other hand, in the electrostatic copying apparatus of the present invention, the rotary drum and the developing device (and cleaning device )
Components of the rotating drum and the developing device (and cleaning device) whose relative positions with respect to the surface of the rotating drum must be precisely adjusted or set because the component is attached to the housing. In particular, the developer retaining member consisting of a hollow cylindrical sleeve and a permanent magnet disposed within the cylindrical sleeve is attached and detached in a direction substantially perpendicular to this direction without being allowed to slide freely in the front and back direction. By freely attaching it to the support,
Each can be detachably attached to the housing separately and independently. When it is necessary to make predetermined components of the rotating drum and the developing device (as well as the cleaning device) slidable independently and relatively in the front-back direction, the predetermined configuration of the rotating drum and the developing device No suitable positioning adjustment means etc. are available which would allow the spacing between the elements (and between the rotating drum and certain components of the cleaning device) to be easily and precisely set ( However, it is not necessary to make certain components of the rotating drum and the developing device (as well as the cleaning device) slidable in the front-back direction. If it is simply necessary to detachably attach the drum in a direction substantially perpendicular to the front-rear direction, the distance between the rotating drum and a predetermined component of the developing device can be adjusted using an appropriate positioning adjustment means. (and the spacing between the rotating drum and certain components of the cleaning device) can be easily and precisely set. Therefore, in the electrostatic copying apparatus of the present invention, although the rotating drum and the developing device (as well as the cleaning device) can be removed separately and independently, there is a gap between the rotating drum and a predetermined component of the developing device. (and the spacing between the rotating drum and certain components of the cleaning device) can be easily and precisely set. On the other hand, the relative position of the rotating drum relative to the surface of the toner receptacle of a cleaning device, for example, does not need to be very precise, rather it can be easily attached to and removed from the support even when the support is in the working position. Components that are desired to be able to be attached to and detached from the support in the front and back direction are easily attached to and detached from the support when the support is in the working position and the extended position. be able to.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the accompanying drawings, which illustrate preferred embodiments of an electrostatographic reproduction apparatus according to the present invention.

First, the overall structure of the illustrated electrostatic copying apparatus will be outlined with reference to FIGS. 1 and 2. FIG.

The illustrated electrostatographic reproduction apparatus has a generally rectangular housing generally designated by the numeral 100. The upper surface of the housing 100 is provided with a transparent plate 102 on which an original to be copied is placed, a flexible original holding plate 104 for covering the original placed on the transparent plate 102, and a control switch. control panel 106
and is provided. At the center of the lower half of the housing 100, a rotary drum 108 with the photosensitive member 2 mounted on its surface is arranged so as to be rotatable about a rotation axis extending in the front-rear direction (that is, the direction perpendicular to the plane of the paper in FIG. 2). has been done. And arrow B
A charging corona discharger 20, a developing device 6, and a transfer corona discharger constituting the transfer means are arranged around the rotating drum 108, which is rotationally driven in the direction of Electric appliances 3
6, a static elimination lamp 32, and a cleaning device 34 are arranged. Moreover, above the rotating drum 108,
Therefore, in the upper half of the housing 100, the image of the original placed on the transparent plate 102 is placed on the surface of the rotating drum 108 in the exposure area between the charging corona discharger 20 and the developing device 6. Optical system 22 for projection
is located. This optical system 22, together with the above-mentioned charging corona discharger, constitutes an electrostatic latent image forming means for forming an electrostatic latent image corresponding to the image of the original on the photosensitive member. Further, below the rotary drum 108, and therefore in the lower part of the housing 100, a paper feed cassette 110a or 110b attached to one side of the housing 100 (the right side in FIGS. 1 and 2) is housed. Transfer paper is transferred to the other side of the housing 100 (FIGS. 1 and 2) through the transfer area where the transfer corona discharger 36 is arranged.
A transport system 112 is disposed for transporting the tray 30 to the tray 30 mounted on the left side in the figure. A pair of cooperating pressure rollers 114a, 114 is provided between the transfer area of the conveyance system 112 and the tray 30.
A fixing device 28 composed of b is arranged.

Elements other than the above-mentioned elements, the configuration of the optical system 22 itself, the configuration of the transport system 112 itself, etc. of the illustrated electrostatic copying apparatus do not correspond to the main constituent elements of the present invention, so a detailed explanation of these will be provided. The details are left to the specification of Japanese Patent Application No. 1983-44162, which is the parent application of the present application, and are omitted in this specification.

Next, along with Figures 1 and 2, Figures 3 to 7
With reference to the drawings, the configurations of the rotating drum 108, the developing device 6, and the cleaning device 34, and the types of these devices will be described in detail.

In the illustrated electrostatographic apparatus according to the present invention,
Front vertical substrates 101 are arranged substantially parallel to each other at predetermined intervals in the housing 100 in the front-rear direction (that is, in the direction perpendicular to the plane of the paper in FIG. 2).
and for the rear vertical board 103, number 17 as a whole.
A support body indicated by 2 is attached so as to be slidable in the front-back direction. The rotating drum 108, the developing device 6, and the cleaning device 34 are each independently and detachably attached to the support body 172, together with the above-mentioned charging corona discharger 20.

Referring to FIGS. 3 and 4, the supports 172 are vertical supports 172 arranged substantially parallel to each other with an interval substantially corresponding to the interval between the front vertical substrate 101 and the rear vertical substrate 103 described above. It includes a front plate 174 and a vertical back plate 176, and a pair of horizontal side members 178 and 180 extending substantially horizontally from opposite sides of the vertical front plate 174 and beyond the vertical back plate 176. Furthermore, the support body 172 is detachably attached to a cover 1 that covers the left side of the upper surface of the support body 172.
81 is also preferably provided. Vertical rear plate 1 of each of the pair of horizontal side members 178 and 180
Guide rolls 182 and 184 are rotatably attached to the rear end portions protruding beyond 76, respectively. Further, the horizontal side member 178 is provided with a guide rail 188 having a concave groove 186 formed on its lower surface, and the horizontal side member 180 is provided with a flat guide rail 190. Furthermore, the upper edge of the horizontal side member 178 near the front end is provided with a notch 192.
is provided.

On the other hand, a support 172 is provided on the front vertical substrate 101.
An opening 195 having a shape corresponding to the shape of is formed, and the support body 172 is mounted at a predetermined operating position through this opening 195. The front vertical board 101 and the rear vertical board 103 include
A pair of channel-shaped guide members, that is, guide rails 1
94 and 196 (see FIGS. 5, 4 and 2) are fixed. A pair of guide rails 194 and 196 extending rearward from the front vertical substrate 101 beyond the rear vertical substrate 103 are guide rolls attached to the rear ends of the horizontal side members 178 and 180 of the support 172. Accepts, guides and supports 182 and 184 husbands. Furthermore, a concave groove 1 of the guide rail 188 of the support body 172 is located below near the tips of the pair of guide rails 194 and 196.
a guide roll 198 that engages with 86 and a support 17;
A guide roll 200 that engages with the lower surface of the second guide rail 190 is rotatably mounted. Furthermore,
In the upper part of the guide roll 194 near the tip, locking means are provided which cooperate with a cutout 192 in the horizontal side member 178 of the support 172. The locking means attached to the partition plate 116 (see FIG. 2) provided in the housing 100 is elastically forced by an elastic means such as a spring to open the opening formed in the partition plate 116 and the guide rail 194. an engaging member (not shown) that can protrude downward through the section and engage the notch 192;
and an operating section 2 that allows the engaging member to be lifted upward by operating it by hand.
04, which may be known per se.

As described above, it is clear that the support body 172 is slidably attached in the front-rear direction (i.e., the direction perpendicular to the plane of the paper in FIG. 2) through the opening 195 formed in the front vertical substrate 101. Will. Briefly, the support 172 is rotated in the fore-and-aft direction by engaging its guide rolls 182 and 184 with guide rails 194 and 196 and by engaging its guide rails 188 and 190 with guide rolls 198 and 200. It is slidably attached to the The support body 172 is directed rearward to a predetermined operating position (i.e., the vertical front plate 174 is
When the vertical rear plate 176 is inserted to a position where the vertical rear plate 176 is substantially flush with the rear vertical base plate 103), the locking means and the notch 192 cooperate to releasably lock the support body 172. do.
When the support body 172 is to be pulled forward from the operating position, the operation portion 204 of the locking means may be operated to release the cooperation between the locking means and the notch 192, and the support body 172 may be slid forward.
As will be mentioned later, the support body 172 is pulled forward from the working position to a predetermined pulled-out position, that is, the fourth
Once in the extended position shown in the figures, suitable stop means (not shown) act on the support 172 to prevent it from being extended further forward beyond the extended position.

With reference to FIGS. 3 to 6, the rotating drum 108
172, the vertical front plate 174 and the vertical rear plate 176 of the support body 172 are rotatably attached to both ends of the shaft 206 of the rotating drum 108 via suitable means such as ball bearings. For receiving the fitted shaft support member 218,
A slot 208 is formed extending from the lower edge at a slight slope upward to the center. Further, a shaft 210 is rotatably attached to the vertical front plate 174 and the vertical rear plate 176 of the support body 172.
The tip of the shaft 210 projects forward beyond the vertical rear plate 176 and the shaft 2 projects rearward beyond the vertical rear plate 176.
10 and each of the above-mentioned slots 20
A rotating drum holding lever 212 for supporting the shaft supporting member 218 installed in the rotary drum 8 in a predetermined position.
is installed.

Attachment and detachment of the rotating drum 108 to the support body 172 are performed as follows. To attach the rotary drum 108 to the support 172, first rotate the holding lever 212 clockwise by an appropriate angle from the position shown in FIG.
08, and then move the rotating drum 108 from below the support 172 to a position where it does not interfere with the support 172.
The shaft supporting members 218 inserted into the shaft 206 and fitted near both ends of the shaft 206 of the rotating drum 108 are inserted into the slot 2.
Insert into 08. After that, hold lever 21
2 is pivoted into the position shown in FIG. 4 and secured in that position by means such as, for example, screws 213. The rotating drum 10 is then placed within the substantially circular hole defined by the hook-like tip of the retaining lever 212 and the semicircular upper end of the slot 208.
The shaft support member 21 fitted on both ends of the shaft 206 of No. 8
8 is supported. The rotating drum 108 is attached to the support body 17
2, the retaining lever 212 is unsecured by means such as screws 213, the retaining lever 212 is pivoted clockwise from the position shown in FIG. All you have to do is move it downward.

As described above, the rotating drum 108 is
It will be appreciated that it is removably attached to the support 172 in a direction substantially perpendicular to the direction of sliding, ie front-to-back, of the support 172.

At the rearmost end of the shaft 206 of the rotating drum 108,
A joint 217 is fixed to be driven and connected to a joint 216 rotatably mounted on the rear vertical substrate 103 (this joint 216 is rotationally driven by a motor via an appropriate drive system). Joint 21
6 and the joint 217 may be joints known per se that can be interconnected when the angular positions therebetween are aligned in a predetermined manner. Axis 2 of rotating drum 108
A grip knob 220 is attached to the tip end of the support member 172, which can be gripped by the operator when pulling out or removing the support body 172 from the housing 100, or when installing or removing the rotary drum 108. This gripping knob 220 (see also FIG. 1) is connected to the shaft 206 of the rotary drum 108 via a one-way clutch housed therein, known per se, and is connected to the shaft 206 of the rotary drum 108 for a predetermined position of the rotary drum 108. The rotary drum 108 and its shaft 206 are rotated only when the knob 220 is rotated in the direction of rotation, ie, in the direction of arrow B (see FIG. 9). As described above, the joint 216 and the joint 2
17 can be connected to each other when the angular positions between the two are aligned in a predetermined manner.
When installing the rotating drum 108, the rotating drum 1
08 and its shaft 206 to rotate the joint 216
It is necessary to align the joint 217 with the
On the other hand, as will be explained in detail later, the rotating drum 108
When the rotating drum 108 is rotated, the hollow cylindrical sleeves of the developer holding members 8 and 50 of the developing device 6 and the cleaning device 34 are also rotated. On the other hand, if the structure is such that the hollow cylindrical sleeves in the developer holding members 8 and 50 of the developing device 6 and the cleaning device 34 can be rotated in the opposite direction to the predetermined rotation direction, As a result, there is a risk that the developer stored in the developer supply container 14 of the developing device 6 may abnormally overflow, or the developer may overflow onto the surface of the rotating drum 108. However, in the rotating drum 108 as shown,
Gripping knob 22 attached to the tip of the shaft 206
0 is connected to the shaft 206 through a one-way clutch that can rotate the shaft 206 only in a predetermined direction. Since the rotating drum 108 rotates only in a predetermined direction even if the rotating drum 108 is rotated in the opposite direction to the rotating direction of the developing device 6 and the cleaning device 34, there is no possibility that the developing device 6 and the cleaning device 34 will be adversely affected.

The charging corona discharger 20 is removably attached to the support 172 by being inserted into openings 222 formed in the vertical front plate 174 and the vertical back plate 176 of the support 172. Charging corona discharger 20
Attachment and removal of the can be carried out very easily by grasping the grip knob 224 provided at the front end thereof. Furthermore, a member 225 constituting a shield case of the charging corona discharger 20 is fixed between the vertical front plate 174 and the vertical rear plate 176 at a position where the charging corona discharger 20 is attached.

In the illustrated example, the developer supply container 14
The developing device 6 including the developer holding member 8 and the developer holding member 8 is also detachably attached to the support 17 in a direction substantially perpendicular to the sliding direction of the support 172, that is, the front-rear direction.
It is installed on 2. The developer supply container 14 of the developing device 6 is, for example, a vertical front plate 174 of the support 172.
and the developer supply container 14 through the vertical rear plate 176.
positioning pins 226 inserted into the front and rear plates of
The developer retaining member 8, which comprises a hollow cylindrical sleeve held in position by suitable means such as, and within which a rolled stationary permanent magnet is disposed, is attached to the developer supply container 14. It is pivotally supported by a bearing member 227 provided on each of the front plate and the rear plate, and a pin 229 attached to the bearing member 227 is adjustably attached to the vertical front plate 174 and the vertical rear plate 176 of the support body 172. adjusted adjustment piece 2
Accepted by 28. As shown above,
By adjusting the position of the adjustment piece 228, the distance between the surface of the rotating drum 108 and the surface of the developer holding member 8 can be finely adjusted. Further, the developer holding member 8 and the developer supply container 14 are integrally configured.
The entire developing device 6 consisting of the shaft bearing member 2 and
By removing the pin 229 attached to 27 and the positioning pin 226, it can be detached from the support body 172. In addition, the developer supply container 14
The developer supply opening located at the top of the support 17
2, and therefore the support 172
A cover 181 (FIG. 3) covering the top surface of the device is left open. In addition, the developer supply member 1
Attached to 4 are elements forming ear cutting means which are known per se.

The support body 172 further includes a cleaning device 3.
4 will also be installed. The developer holding member 50 of the cleaning device 34, which is composed of a hollow cylindrical sleeve and a rolled stationary permanent magnet disposed inside the sleeve, moves in the sliding direction of the support 172, that is, in the front-rear direction. The support member 172 is removably attached in a direction substantially perpendicular to the support member 172 . More specifically, the hollow cylindrical sleeve in which the rolled permanent magnet is disposed has an axis that is aligned with the adjusting piece 23.
0 and is rotatably supported by the adjustment piece 2
30 are adjustably mounted to the vertical front plate 174 and the vertical back plate 176 of the support 172. Therefore, by adjusting the position of the adjustment piece 230, the distance between the surface of the rotating drum 108 and the surface of the developer holding member 50 can be finely adjusted. Alternatively, simply adjust the adjusting piece 230 to the vertical front plate 174 and the vertical rear plate 1.
By separating the developer holding member 50 from the support member 172, the developer holding member 50 can be separated from the support body 172. The receptacle 58 of the cleaning device 34 is fixed between the vertical front plate 174 and the vertical back plate 176 of the support 172, and its front end cooperates with the lower edge of the vertical front plate 174 to receive the receptacle 58. It rests on a frame member 54 defining an opening. Attached to this frame member 54 is an ear cutting member (not shown in FIG. 4), which is known per se. A developer receiver 58 inserted through a receiving opening defined in the front portion and placed on the frame member 54 has a gripping knob 232 provided at its front end.
It can be attached and detached very easily by grasping.

On the other hand, the static elimination lamp 32 and the transfer corona discharger 36 are installed at predetermined positions around the rotary drum 108 on the front vertical substrate 101 and the rear vertical substrate 1.
It is attached directly to 03. As most clearly illustrated in FIG.
It is fixed to the front vertical substrate 101 and the rear vertical substrate 103 at predetermined positions with respect to the surface of the rotating drum 108 mounted on the rotary drum 72 by suitable means such as set screws. In addition, a corona discharger 36 for transfer
is inserted into the cutout portion 234 of a predetermined shape formed in the front vertical substrate 101 and the rear vertical substrate 103, so that the surface of the rotating drum 108 mounted on the support body 172 is It is removably attached to the position. This transfer corona discharger 3
Attachment and detachment of 6 can be carried out very easily by grasping the grip knob 236 provided at the front end thereof.

Furthermore, as shown most clearly in FIG. 5, the surface of the rotating drum 108 is located at a position adjacent to the transfer corona discharger 36 on the downstream side in the direction of movement and near the rear end of the transfer corona discharger 36. The position is
Rear vertical board 10 via mounting bracket 238
A transfer paper peeling claw 40 is fixed to 3. This peeling claw 40 is attached to the rotating drum 108 in order to transfer the toner image formed on the surface of the rotating drum 108.
8 is peeled off from the surface of the rotating drum 108 in order to send the transfer paper in close contact with the surface of the rotary drum 108 to the fixing device 28 through the transfer paper conveyance path defined by the transfer paper feed roller 240 and the transfer paper guide plate 42. It is something. The transfer paper peeled off from the surface of the rotating drum 108 by the action of the peeling claw 40 is fed onto the guide plate 42 by the action of a peeling roller 241 (see FIG. 7) that cooperates with the feeding roller 240. be done. Transfer paper brought into close contact with the surface of the rotating drum 108 for toner image transfer is transferred to the rotating drum 108.
In order to reliably remove it from the surface of
08 is made smaller in diameter than other parts (the surface of this small diameter part is not used for forming electrostatic latent images and toner images), or the width of the rotating drum 108 is made somewhat smaller, so that the tip of the peeling claw 40 Preferably, the portion 40a is configured to engage an edge of the transfer paper that protrudes from the surface of the rotating drum 108.

In the electrostatic transfer device of the type described above,
By performing the copying process, the developer contained in the developer supply container 14 of the developing device 6 is consumed, and therefore, it is necessary to replenish the developer supply container 14 from time to time. Also, by performing the copying process, the receiver 58 of the cleaning device 34 is
Developer removed from the surface of the rotating drum 108 accumulates within the developer receiver 58, and therefore it is sometimes necessary to recover the developer that has accumulated within the developer receiver 58. On the other hand, in order to perform a good developing process, the developing device 6
The distance between the surface of the developer holding member 8 and the surface of the rotating drum 108, or the distance between the surface of the developer holding member 8 of the developing device 6 and the tip of the ear cutting member 16 attached to the developer supply container 14, etc. It is important to maintain proper dimensions. In order to perform a good cleaning process, the distance between the surface of the developer holding member 50 of the cleaning device 34 and the surface of the rotating drum 108 or the distance between the surface of the cleaning device 34 and the surface of the rotating drum 108 must be
4, the surface of the developer holding member 50 and the ear cutting member 56
It is important to maintain appropriate dimensions such as the distance between the tip and the tip.

However, in a preferred embodiment of an electrostatographic apparatus according to the present invention, the front vertical substrate 10 is
1 and a support body 172 that is slidably attached to the rear vertical substrate 103 in the front-rear direction.
A developing device 6 is attached together with the developing device 6.
The supply opening of the developer supply container 14 is connected to the support 172.
It is open on the top surface. Therefore, the developer replenishment operation can be accomplished by simply pulling the support 172 forward and replenishing the developer through the replenishment opening of the developer supply container 14 opened on the upper surface of the support 172. I can do it. Therefore, in order to replenish the developer, the entire developing device 6 can be slid forward relative to the rotating drum 108 or the developer supply container 14 can be pulled out relative to the developer holding member 8 of the developing device 6. There is no need to configure it.
If the developing device 6 as a whole or the developer supply container 14 can be slid forward relative to the rotating drum 108 or the developer holding member 8 of the developing device 6 as in a conventional electrostatic copying apparatus, It is quite difficult, if not impossible, to ensure that the above-mentioned spacing is maintained at a precisely predetermined value, and also the entire development device 6 or the developer supply container 14.
There is a possibility that the above-mentioned interval may be changed by sliding in the front-back direction.

Also, in a preferred embodiment of an electrostatographic reproduction apparatus according to the present invention, cleaning device 34 is provided as described above.
is also mounted on the support 172 and is configured such that only the receptacle 58 of the cleaning device 34 can be moved forward relative to the support 172 and withdrawn. Therefore, when collecting the developer accumulated in the developer receiver 58, it is possible to quickly and easily collect the developer accumulated in the developer receiver 58 by pulling only the receiver 58 forward without affecting the above-mentioned spacing. can be carried out. To collect the developer, the entire cleaning device 34 is moved to the rotating drum 108.
Or the developer holding member 5 of the cleaning device 34
There is no need to configure the frame member 54 to which the ear cutting member 56 is attached to the frame member 54 to be slid forward and pulled out, and therefore it is possible to precisely maintain the above-mentioned interval at a predetermined dimension. .

Additionally, in a preferred embodiment of the electrostatographic copying apparatus according to the present invention, as can be readily seen from FIGS. 2 and 5, when support 172 is slid forward and pulled out, transfer corona discharger 36 is activated. The arranged transfer area and the transfer paper transport path in the vicinity thereof are directly exposed, and therefore, if a transfer paper jam occurs in these areas, it can be easily removed.

Furthermore, the charging corona discharger 20 has a support 1
72, the transfer corona discharger 36 is attached to the front vertical substrate 101 and the rear vertical substrate 103 so that they can be attached and detached very easily, so that if these dischargers are damaged, cut, or contaminated, can be repaired, cleaned or replaced very easily.

As mentioned above, when the support 172 on which the developing device 6, the cleaning device 34, and the charging corona discharger 20 are attached is pulled forward to a predetermined position, it is stopped by a suitable stopping means (not shown). Further forward movement therefrom is thus prevented, thereby preventing support 172 from inadvertently falling off. In addition, by pulling the support body 172 forward to a predetermined position and then lifting it slightly upward, the support body 172 can be attached to the housing 10.
It can be configured so that it can completely deviate from 0. In this case, a separate auxiliary support frame (not shown) is provided to support the support 172, which is completely detached from the housing 100, by engaging, for example, the lower surfaces of the guide rails 188 and 190 thereof. It is also possible to provide one and temporarily place it on the auxiliary frame.

Next, referring to FIG. 7, a gear 344 (see also FIG. 6) is fixed to the shaft 206 of the rotating drum 108, and this gear 344 drives a speed increasing gear device 346. The developer retaining member 50 of the cleaning device 34 is connected in a driving manner to a gear 348 fixed to the shaft of the hollow cylindrical sleeve, and the developer in the developing device 6 is connected to the gear 348 through a speed increasing gear device 350 and an idler gear 352. It is drivingly connected to a gear 354 fixed to the shaft of the hollow cylindrical sleeve in the holding member 8 . Therefore,
Rotating drum 108 connects joints 216 and 217 (sixth
When the hollow cylindrical sleeve in the developer holding member 8 of the developing device 6 and the hollow cylindrical sleeve in the developer holding member 50 of the cleaning device 34 are rotated at an appropriate speed.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an electrostatic copying apparatus according to the present invention. FIG. 2 is a sectional view of the electrostatic copying apparatus shown in FIG. 1. 3 is a perspective view of the support of the electrostatic copying apparatus shown in FIG. 1; FIG. FIG. 4 is a partial perspective view showing the support of the electrostatographic copying apparatus shown in FIG. 1 and various components mounted thereon. Figure 5, 1st
FIG. 2 is a partial perspective view of a portion of the electrostatic copying apparatus shown in the figure to which a support is attached. FIG. 6 is a side view of a portion of the electrostatic copying apparatus shown in FIG. 1 to which a rotating drum is attached. 7th
1 is a simplified partial perspective view showing the driving connections between the rotating drum and the developing and cleaning devices of the electrostatographic copying apparatus shown in FIG. 1; FIG. 6...Developing device, 34...Cleaning device,
100...housing, 108...rotating drum,
172...Support.

Claims (1)

[Claims] 1. A housing, a transparent plate attached to the upper surface of the housing for placing a document to be copied, and a transparent plate attached to the housing so as to be rotatable about a rotation axis extending in the front-rear direction. a rotating drum having a photosensitive member on its surface; and an optical system for projecting an image of the original onto the photosensitive member to form an electrostatic latent image corresponding to the image of the original on the photosensitive member. an electrostatic latent image forming means; a hollow cylindrical sleeve for applying toner to the electrostatic latent image formed on the photosensitive member to develop it into a toner image; and a hollow cylindrical sleeve disposed within the hollow cylindrical sleeve. An electrostatic copying apparatus comprising: a developing device including a developer holding member made of a permanent magnet; and a transfer means for transferring the toner image formed on the photosensitive member to a transfer paper; A support body is attached to the housing in a sliding direction in the front-rear direction between a working position in the housing and a pulled-out position pulled out a predetermined amount forward from the working position, and the support body is moved to the working position. Locking means for releasably locking and stop means for preventing the support from being pulled out further forward beyond the pull-out position are provided, and the rotary drum and the developer are attached to the support. The devices are each attached separately and removably,
An electrostatic copying apparatus characterized in that at least the developer holding member of the developing device is detachable in a direction substantially perpendicular to the front-rear direction. 2. The support includes a vertical front plate and a vertical rear plate that are located substantially parallel to each other at a predetermined distance in the front-rear direction, and a vertical rear plate extending rearward from both sides of the vertical front plate. a pair of horizontal side members extending substantially horizontally beyond the sides interconnecting the vertical front plate and the vertical rear plate, the pair of horizontal side members being disposed within the housing; 2. An electrostatic copying apparatus according to claim 1, wherein said support member is slidably mounted on said housing in said front-rear direction by being slidably mounted on a pair of fixed guide members. 3. A slot with one end open is formed in each of the vertical front plate and the vertical rear plate of the support,
By inserting shaft support members mounted near both ends of the rotating drum into the slots and releasably retaining them within the slots, the rotating drum is rotated in a direction substantially perpendicular to the longitudinal direction. 3. An electrostatic copying apparatus according to claim 2, wherein the electrostatic copying apparatus is detachably mounted on the support. 4. The developing device includes a developer supply container containing a developer, both ends of the developer holding member are supported by a front plate and a rear plate of the developer supply container, and the developer supply container and the The entire development device, including the developer retaining member, is secured to the front and rear of the development device using at least two pairs of pins that are received in the vertical front plate and the vertical rear plate of the support. 4. An electrostatic copying apparatus according to claim 2, wherein the electrostatic copying apparatus is detachably attached to the support in a direction substantially perpendicular to the front-rear direction. 5 at least one pair of the at least two pairs of pins are adjustably received in the vertical front plate and the vertical rear plate of the support, and Claim 4: By adjusting the position of the pair of pins, the distance between the surface of the hollow cylindrical sleeve and the surface of the rotating drum mounted on the support can be adjusted. electrostatographic equipment. 6. The developer supply container of the developing device has a developer supply opening on its upper surface, and the developer supply opening opens on the upper surface of the support.
6. The electrostatic copying apparatus according to item 5. 7 The rear end of the rotating drum is mounted within the housing and driven by a drive source when the rotating drum is mounted on the support and the support is placed in the operative position within the housing. 7. An electrostatic copying apparatus according to claim 1, further comprising a joint that can be connected to a connected drive joint. 8. The joint provided at the rear end of the rotating drum is of a form that can be connected to the drive joint when the joint is placed at a predetermined angular position with respect to the drive joint, and the joint provided at the front end of the rotary drum 8. An electrostatic copying apparatus according to claim 7, wherein a gripping knob is connected to the holder via a one-way clutch. 9. The electrostatic device according to claim 7 or 8, wherein the hollow cylindrical sleeve of the developing device is rotatably mounted and drivingly connected to the rotating drum by a plurality of gears. Copying equipment. 10 The electrostatic latent image forming means includes a charging corona discharger for applying corona discharge to the photosensitive member of the rotating drum, and the charging corona discharger is slid in the front-rear direction with respect to the support. 10. An electrostatographic reproduction apparatus according to claim 1, wherein the electrostatographic reproduction apparatus is removably mounted on the support. 11. The electrostatic copying apparatus according to any one of claims 1 to 10, wherein the developing device is of a type that uses a one-component developer consisting only of conductive or semiconductive magnetic toner. . 12 A housing, a transparent plate attached to the upper surface of the housing for placing a document to be copied, and a photosensitive member attached to the surface of the housing and rotatably attached to the housing about a rotation axis extending in the front-rear direction. an electrostatic latent image forming means including an optical system for projecting the image of the original onto the photosensitive member for forming an electrostatic latent image corresponding to the image of the original on the photosensitive member; and a hollow cylindrical sleeve and a permanent magnet disposed within the hollow cylindrical sleeve, for applying toner to the electrostatic latent image formed on the photosensitive member and developing it into a toner image. a developing device including a developer holding member; a transfer means for transferring the toner image formed on the photosensitive member to a transfer paper; and a transfer means for removing toner remaining on the photosensitive member after transfer. An electrostatographic copying apparatus comprising a cleaning device including a hollow cylindrical sleeve and a developer retaining member constituted by a permanent magnet disposed within the hollow cylindrical sleeve, wherein the housing includes an action inside the housing. a support body is attached to the support body so as to be slidable in the front-rear direction between the support body and a pull-out position where the support body is pulled out a predetermined amount forward from the work position, and locking means for releasably locking the support body in the work position. and a stop means for preventing the support from being pulled out further forward beyond the pull-out position, and the rotary drum, the developing device, and the cleaning device are attached to the support. At least the developer holding member of the developing device and the developer holding member of the cleaning device are detachably mounted separately in a direction substantially perpendicular to the front-rear direction. An electrostatic copying device characterized by: 13 The support body includes a vertical front plate and a vertical rear plate that are located substantially parallel to each other at a predetermined interval in the front-rear direction, and a vertical rear plate extending rearward from both sides of the vertical front plate. a pair of horizontal side members extending substantially horizontally beyond the sides interconnecting the vertical front plate and the vertical back plate, the pair of horizontal side members being mounted within the housing; The electrostatic copying apparatus according to claim 12, wherein the support body is slidably mounted on the housing in the front-rear direction by being slidably mounted on a pair of guide members fixed to the electrostatic copying device. . 14 Slots with one end open are formed in each of the vertical front plate and the vertical rear plate of the support body, and the shaft support members mounted near both ends of the rotating drum are inserted into the slots. Claim 13, wherein the rotating drum is releasably attached to the support in a direction substantially perpendicular to the longitudinal direction by being releasably held in the slot. Electrostatographic equipment. 15 The developing device includes a developer supply container containing a developer, both ends of the developer holding member of the developing device are supported by a front plate and a rear plate of the developer supply container, and the developer is The entire development device, including the supply container and the developer retaining member, includes at least two pairs of pins secured to the front and rear of the development device and received in the vertical front plate and the vertical back plate of the support. 15. The electrostatic copying apparatus according to claim 13, wherein the electrostatic copying apparatus is detachably attached to the support body in a direction substantially perpendicular to the front-rear direction. 16 at least one pair of the at least two pairs of pins are adjustably received in the vertical front plate and the vertical back plate of the support, and Claim 15: By adjusting the position of the pair of pins, the distance between the surface of the hollow cylindrical sleeve and the surface of the rotating drum mounted on the support can be adjusted. electrostatographic equipment. 17. Claim 1, wherein the developer supply container of the developing device has a developer supply opening on its upper surface, and this developer supply opening opens on the upper surface of the support.
The electrostatic copying apparatus according to item 5 or 16. 18 The developer retaining member of the cleaning device is mounted on the support such that the spacing of the surface of the hollow cylindrical sleeve relative to the surface of the rotating drum can be adjusted, and the cleaning device further The receiver includes a receiver for receiving the toner released from the surface of the sleeve, and the receiver is attached to the support so as to be detachable by sliding in the front-rear direction independently of the developer holding member. An electrostatic copying apparatus according to any one of claims 12 to 17. 19 At the rear end of the rotary drum, the rotary drum is mounted in the housing and driven by a drive source when the rotary drum is mounted on the support and the support is in the operative position within the housing. 19. An electrostatographic copying apparatus according to claim 12, further comprising a joint that can be connected to a coupled drive joint. 20 The joint provided at the rear end of the rotating drum is of a form that can be connected to the drive joint when the joint is placed at a predetermined angular position with respect to the drive joint, and the joint provided at the front end of the rotary drum is 20. The static rotation copying apparatus according to claim 19, wherein a gripping knob is connected to the grip via a one-way clutch. 21. Claims in which the hollow cylindrical sleeve of the developing device and the hollow cylindrical sleeve of the cleaning device are rotatably mounted and drivingly connected to the rotating drum by a plurality of gears. The electrostatic copying apparatus according to item 19 or 20. 22 The electrostatic latent image forming means includes a charging corona discharger for applying corona discharge to the photosensitive member of the rotating drum, and the charging corona discharger is slid in the front-rear direction with respect to the support. 22. An electrostatographic reproduction apparatus according to any one of claims 12 to 21, wherein the apparatus is removably mounted on the support. 23. The electrostatic copying apparatus according to any one of claims 12 to 22, wherein the developing device is of a type that uses a one-component developer consisting only of conductive or semiconductive magnetic toner. .