JPS60217371A - Electrostatic copying machine - Google Patents

Abstract

PURPOSE:To facilitate setting and detaching a rotary drum to and from an upper supporting frame body by locking a unit frame in a prescribed acting position for supporting frame bodies freely releasably and setting one end part of the unit frame to supporting frame bodies freely turnably. CONSTITUTION:A unit 88 including the rotary drum and a cleaning device has a unit frame 90, and it is set to an upper supporting frame body 6 freely attachably and detachably. The unit frame 90 is freely turned with a supporting pin 96 as the center in the opening/closing direction, and a limiting means 154 is interposed between the supporting frame body 6 and the unit frame 90, and turning in the opening direction of the unit frame 90 s limited in a prescribed non-acting position.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to an electrostatic copying machine, and more particularly to a shell comprising a lower support frame and an upper support frame rotatably attached to the lower support frame. Regarding type electrostatic copying machines.

<Prior Art> As is well known to those skilled in the art, a so-called shell includes a lower support frame and an upper support frame attached to the lower support frame so as to be pivotable between an open position and a closed position. An electrostatic copying machine called "Kata" has been proposed and put into practical use. In such a shell-type electrostatic copying machine, generally, when the upper support frame is placed in the open position, at least a portion of the copy paper conveyance path on which a copy image is formed is opened, and therefore This method has the advantage that, when a copy paper jam occurs in the conveyance path, the jammed copy paper can be easily taken out.

However, in conventional electrostatic copying machines of this type,
A rotating drum is removably attached to the upper support frame which is rotatably attached to the lower support frame, but it is difficult to attach and detach it sufficiently easily and quickly, and the attachment and detachment work is difficult. At times, there was a risk of damaging the photoreceptor disposed on the circumferential surface of the rotating drum.

Therefore, in order to eliminate the above-mentioned drawbacks,
As disclosed in Japanese Patent No. 13526, it has been proposed that a cleaning device that is detachably attached to an upper support frame is provided with a drum support section, and a rotating drum is detachably attached to the drum support section. In this improved electrostatic copying machine, as can be easily understood from the specifications and drawings of Japanese Utility Model Application No. 58-13526, the attachment of the rotating drum to the upper support frame requires The drum support part KN of the cleaning device in the detached state is removably attached, and then, with the upper support frame in the open position, the cleaning device is placed on the lower support frame as required, and then the upper The required passage is achieved by positioning the support frame in the closed position and inserting the drum shaft through the shaft insertion hole formed in the upper support frame, and detachment of the rotating drum from the upper support frame is accomplished as described above. Reversely to the above operation, the drum shaft is pulled out from the upper support frame, and then the upper support frame is placed in the open position, and then the cleaning device is removed from the lower support frame, and the rotating drum is removed from the cleaning device. By means of traps, the required level of success is achieved.

However, as is easily understood, in such an electrostatic copying machine, in order to remove the rotating drum, the cleaning device placed on the lower support frame is removed, and then the cleaning device is removed. Therefore, due to the relatively high IT lid of the cleaning device including the rotating drum, it is relatively difficult to remove the cleaning device from the lower support frame; There is a risk that the drum may come into contact with another member and damage the photoreceptor, and furthermore, the operation for removing the rotating drum is complicated.

<Object of the Invention> An object of the present invention is to provide a further improved electrostatic copying machine in which the rotating drum can be easily and quickly attached to and detached from the upper support frame. That's true.

Other objects of the present invention will become clear from the following description. <Summary of the Invention> According to a first aspect of the present invention, there is provided a lower support frame body, and a lower support frame body extending in the front-rear direction at one end thereof. an upper support frame mounted on the lower support frame so as to be able to freely pivot between an open position and a closed position about a pivot axis of 1; and a unit mounted on the upper support frame; In an electrostatic copying machine, the unit includes a unit frame and a rotating drum having a photoreceptor on its peripheral surface and detachably attached to the unit frame; pivotable attachment means for attaching one end located at the upper support frame to the upper support frame so as to be pivotable about a second pivot axis extending substantially parallel to the first pivot axis; 11- locking means for releasably locking the unit frame in a predetermined operating position relative to the upper support frame; 11- with respect to the opening movement direction of the upper support frame about the first pivot axis; The second pivot axis /! is in the opposite direction. An electrostatic copying machine is provided, comprising: a restriction means for restricting the opening movement of the unit frame centered at 1 lil from the operating position to a predetermined non-operating position.

Further, according to the second aspect of the present invention, a lower support frame body;
An upper support frame body, which is attached to the lower support frame body and a nucleus upper support frame body, is attached to the lower support frame body so as to be able to freely pivot between an open position and a closed position about the rotation center axis of Ml extending in the forward direction at one end thereof. In an electrostatic copying machine, the unit includes a unit frame and a rotating drum having a photoreceptor on its peripheral surface and detachably attached to the unit frame; , one end located on the first pivot axis side is pivotable about a second pivot axis extending substantially parallel to the first pivot axis. a rotatable mounting means for mounting on the lower support frame; a support member provided on the lower support frame; and a support member provided on the other end of the unit frame and slidably abutted on the upper surface of the support member. An electrostatic copying machine is provided, comprising: a supported piece;

<Preferred Embodiments of the Invention> An electrostatic copying machine configured according to the present invention will be described below with reference to the accompanying drawings.

A first specific example of an electrostatic copying machine constructed according to the present invention will be described with reference to FIGS. 1 to 8. first,
The overall structure of the electrostatic copying machine will be outlined with reference to FIG. 1. The electrostatic copying machine shown in the figure is provided with a generally rectangular parallelepiped-shaped housing indicated by the overall number 2. As shown in FIG. The housing 2 is defined by a lower support frame 4 and an upper support frame 6 rotatably attached to the lower support frame 4 (described in detail later).

A document placing means 8 is disposed on the housing 2 so as to be able to reciprocate in the left-right direction in FIG. The document placement means 8 includes a document placement table 10 mounted so as to be reciprocally movable;
It includes a transparent plate (not shown) fixed to the document table 10 and a nine document cover (not shown) attached to the document table 10 so as to be openable and closable.

A rotating drum 12 having a photoreceptor on its circumferential surface is rotatably mounted approximately in the center of the housing 2 . Arrow 1
Surrounding the rotating drum 12, which is rotated in the direction indicated by 4, there are, in order in the direction of rotation, a charging corona discharger 16, an optical system 18, and an electrostatic latent image developing device, which itself may have an appropriate form. A cleaning device 92B (constituting cleaning means) having a transfer corona discharger 22, a peeling corona discharger 24, and a cleaning blade 26 is provided. Further, a document irradiation lamp 30 is provided in association with the optical system 18 . The document irradiation lamp 30 is connected to an opening 3 formed in the top wall of the housing 2.
2, the original to be copied (not shown) placed on the transparent plate of the original placing means 8 is irradiated. The optical system 18 is constructed by arranging in the front-back direction a large number of elongated optical elements (for example, Rondo-shaped lenses sold by Nippon Sheet Glass Co., Ltd. under the trade name "Selfoc Micro Lens") that extend in the vertical direction. The reflected light from the original is projected onto the circumferential surface of the rotating drum 12.

A copy paper transport mechanism, generally designated by numeral 34, is disposed in substantially the lower half of the housing 2. As shown in FIG. A cassette-type copy paper supply device [36] is provided at one end of the copy paper transport mechanism 34, at the right end in FIG. A copy paper supply device [36 includes a copy paper cassette receiving section 40 provided with a feeding roller 38, and a copy paper feeding device 36 that includes a copy paper cassette receiving section 40 provided with a feeding roller 38; It is configured in combination with a paper cassette 42, and by the action of a feeding row 238, the copy paper is fed one by one from the sheet-like copy paper layer accommodated in the copy paper cassette 42. Copy paper sent out from the copy paper cassette 42 is guided by a guide plate 44, guided on a guide plate 50 by the action of two pairs of conveying rows 46 and 48, and transferred to a rotating drum 12, a transfer corona discharger 22, and a peeler. and the corona discharger 24 for use. Next, it is conveyed by the action of a suitable conveyance belt mechanism 52 and sent to a fixing device 54 .

Thereafter, the liquid is discharged into the tray 56 through an opening 16 formed on the left side of the housing 2. The conveyor belt mechanism 52 includes a guide plate 53 and an endless conveyor belt 55 disposed in an opening formed in the guide plate 53 (see FIG. 2). The fixing device 54 includes an upper roller 5 having heating means.
8 and a lower roller 60. The copy paper from the fixing roller pair 62 is discharged onto the receiving tray 56 by the action of the discharge roller pair 64 and 66.

In the conventional electrostatic copying machine described above, the rotating drum 12
is rotated in the direction indicated by arrow 14, charging corona discharger 16 substantially uniformly charges the photoreceptor to a particular polarity, and an image of the document is then projected onto the photoreceptor through optical system 18, thus An electrostatic latent image corresponding to the original is formed on the photoreceptor.

Thereafter, a developer device 20 applies toner particles to the electrostatic latent image on the photoreceptor to develop the electrostatic latent image into a toner image. Next, the copy paper fed from the copy paper supply device 36 is brought into contact with the photoreceptor, and the toner image on the photoreceptor is transferred onto the copy paper by the action of the transfer corona discharger 22. Thereafter, the copy paper is peeled off from the photoreceptor by the action of the peeling corona discharger 24. The copy paper onto which the toner image has been transferred is then conveyed to a fixing unit R54, and after the toner image is fixed in the fixing device 54, it is discharged onto a receiving tray 56. Meanwhile, the rotating drum 12 continues to rotate, and the cleaning device 28 removes residual toner particles from the photoreceptor.

Next, referring to FIG. 2 together with FIG. 1, the lower support frame 4
And the structure of the upper support frame 6 will be explained. The lower support frame 4 includes a vertical front substrate 68 and a vertical rear substrate arranged at intervals in the front-rear direction (direction perpendicular to the plane of the paper in FIG. 1, direction from the lower right to the upper left in FIG. 2). 70
, and a lower plate 72 fixed to their lower ends. The lower plate 72 has a bottom wall portion that defines the bottom surface of the housing 2, and both lower wall portions that define substantially lower half portions of both side surfaces of the housing 2. On the other hand, the upper support frame 6 includes a vertical front substrate 74 and a vertical rear substrate 76 arranged at intervals in the front-rear direction, and an upper plate 78 (see FIG. 1) fixed to the upper ends of these. There is. The upper plate 78 has a top wall part that defines the top surface of the housing 2, and both upper wall parts that define the road halves of both sides of the housing 2. Such an upper support frame 6 is attached to the lower support frame 4 so as to be pivotable between a closed position shown by a solid line in FIG. 1 and an open position shown by a two-dot chain line in FIG. 1 and shown in FIG. It is installed. For more details,
Vertical front substrate 68 and vertical rear substrate 700 of the lower support frame 4
One end (the right end in FIG. 1) is provided with a support protrusion 80 (only one side is shown in FIGS. 1 and 2) that protrudes upward. The upper support 19 - a vertical front board 74 and a vertical back board 76 of the frame 6 are rotatably mounted. Therefore, the upper support frame 6 is connected to the pin 82.
(This pin 82 constitutes a first pivot axis extending in the front-rear direction.) It is freely pivotable in the opening direction indicated by arrow 84 and the closing direction indicated by arrow 86. Although not shown, there is provided between the lower support frame 4 and the upper support frame 6 a structure for elastically biasing the upper support frame 6 in the opening direction indicated by the arrow 84 with respect to the lower support frame 4. means are interposed. This spring means biases the upper support frame 6 about the pin 82 in the opening direction indicated by the arrow 84;
When the upper support frame 6 is pivoted in the opening direction shown by the arrow 84 due to the elastic biasing action of the spring means, as is easily understood, the elastic biasing force of the spring means is applied in response to the pivoting of the upper support frame 6. becomes gradually smaller. When the upper support frame 6 is rotated to the open position, the pin 822
0-, the elastic biasing force of the spring means which causes the upper support frame 6 to pivot in the opening direction indicated by the arrow 84, and the weight of the upper support frame 6 itself and the various components attached thereto. As a result, the moment that causes the upper support frame 6 to pivot in the closing direction shown by the arrow 86 about the pin 82 is balanced, and thus the upper support frame 6 moves as indicated by the two-dot chain line in FIG. 2 and maintained in the open position shown in FIG.

This spring means is substantially the same as that disclosed in the specification and drawings of Japanese Patent Application No. 57-209849 (title: Electrostatic Copying Machine) filed by the applicant on November 30, 1988. Therefore, please refer to the specification and drawings of Japanese Patent Application No. 57-209849 for details. The lower support frame 4 and the upper support frame 6 described above are further provided with locking means (not shown) for locking the upper support frame 6 in the closed position shown in solid lines in FIG. ing.

In the illustrated electrostatic copying machine, as will be understood with reference to FIGS. 1 and 2, the lower components include a copy sheet feeder 36, a transfer corona discharger 22. Stripping corona discharger 24° guide plates 44 and 50.
Conveyance row 246. Conveyor belt mechanism 52 and fixing device 15
4 is attached to the lower support frame 4 and includes the components located above, namely the rotating drum 12. Corona discharger for charging 16. Optical system 18° Developing device 20. Cleaning device 28. Original irradiation lamp 30. The document placing means 8 and the conveyance roller 48 are attached to the upper support frame 6. Therefore, when the upper support frame 6 is positioned from the closed position shown by the solid line in FIG. 1 to the open position shown by the two-dot chain line in FIG. 1 and shown in FIG. When copy paper is jammed, the jammed copy paper can be easily taken out.

In the conventional electrostatic copying machine described above, the rotating drum 12
and the cleaning device 28 are configured as a unit,
This unit is configured to be detachably attached to the upper support frame 6. Referring primarily to FIGS. 3-5, the unit generally designated by the numeral 88 includes a unit frame 90. As shown in FIGS. The unit frame 90 has front walls 92 and It has a rear wall 94. Each of the front wall 92 and the rear wall 94 has a left part formed in a substantially rectangular shape, a right part formed in a substantially circular shape, and support protrusions 92a and 94m are provided at the right ends thereof.

A support pin 96 constituting a part of the pivotable mounting means is implanted on the front surface of the support projection 92m of the front wall 92, and a support pin 96 constituting a part of the pivotable mounting means is installed on the rear surface of the support projection 94m of the rear wall 94.
3. A support pin 98 constituting a part of the means is implanted.

A substantially U-shaped recess 100 (in FIG.
(only recesses formed in are shown) are provided. The recess 100 extends inward from the upper ends of the front wall 92 and the rear wall 94, and has a semicircular bottom surface. A rectangular notch 104 is formed at the upper end of each recess 100, and the upper end of the end surface of each recess 100 is inclined outwardly and upwardly (only one side is shown in FIG. 4).

This inclined surface 100a acts as a guide when the rotating drum 12 is mounted. A shaft hole 102 is provided at the bottom of the recess 10θ.
are formed in the front wall 9, and each of the shaft holes 102 is formed in the front wall 9.
A protrusion 111 (FIGS. 4 and 5) provided on the front surface of the rear wall 94 and a protrusion 112 (5th
(Fig.) and passes through 24-. The recess 100 mentioned above defines a receptacle for supporting the rotating drum 12. Front wall 92 and rear wall 9
Further, locking pins 106 and 108 are provided on the rear surface of 4 (see FIG. 5). Locking bins 106 and 108
are implanted at the lower right end of the front surface of the front wall 92 and the lower right end of the rear surface of the rear wall 94, respectively, and one end of these is provided with a locking groove 109 (in the locking pin 106 in FIG. 4). A cleaning device 28 is installed between the above-mentioned front wall 92 and rear wall 94 where the locking grooves (only the formed locking grooves are shown) are formed. Cleaning device 28 includes a device housing 116 secured between front wall 92 and rear wall 94. A cleaning blade 26 is attached to the device housing 116 to remove toner particles remaining on the photoreceptor.

The cleaning device 28 has a discharge pipe 118 for discharging toner particles removed by the cleaning blade 26 into a container (not shown), and a discharge pipe 118 is formed on one end side of the discharge pipe 118 or on the front wall 92. It is installed through a through hole. Such a cleaning device 28 is disclosed in U.S. Pat. They are substantially the same, so please refer to the specification and drawings of Japanese Utility Model Application No. 110157/1983 for details.

Next, the manner in which the rotating drum 12 is attached to the unit frame 90 will be explained with reference mainly to FIG. 4. A cylindrical portion 120 on which a photoreceptor is disposed on the circumferential surface of the rotating drum 12, and side wall portions 122a and 12 fixed to both ends of the cylindrical portion.
2b, :, and cylindrical support members 124 and 126 are attached to the outer surface of each side wall portion 122a and 122b. A circular shaft hole 128 is formed in the support member 124, and an elongated shaft hole 130 is formed in the support member 126. It is rotatably attached to the unit frame 90 by inserting it into a recess formed in the wall 92 and a recess 100 formed in the rear wall 94 from above.

Next, the manner in which the unit frame 90 is attached to the upper support frame 6 will be described with reference to FIGS. 2 to 5. A receiving member 132 (FIG. 4) constituting a part of the rotatable mounting means is fixed to the rear surface of the vertical front board 74 of the upper support frame 6, and a receiving member 132 (FIG. 4) constituting a part of the rotatable mounting means is fixed to the front surface of the vertical rear board 76. A receiving member 134 (FIGS. 2 and 4) constituting a part is fixed. The inner surfaces of the receiving members 132 and 134 include an opening 27 extending from the opening located at the left end to the upper right side and further to the right side 27.
- A downwardly extending receptacle 136 is provided (see also FIG. 8). A through hole is formed in the vertical front substrate 74 of the upper support frame 6, and a support member 140 in which a hole 138 defining an axial hole is formed is attached to this through hole. Further, a through hole is formed in the vertical rear substrate 76 of the upper support frame 6, and a rotating shaft 144 (FIG. 3) is rotatably mounted in the through hole via a support member 142t.

A gear 146 is fixed to the outer end of the rotating shaft 144 that protrudes rearward from the vertical rear substrate 76.
An elongated recess 148 (FIG. 2) is formed in the inner end surface projecting forward from the vertical rear substrate 76. The unit frame 90 having the above-mentioned configuration has the support bin 96 embedded in the front wall 92 mounted on the receiving part 136 of the receiving member 132 fixed to the vertical front board 74, and the support bin 98 embedded in the rear wall 94 mounted on the receiving part 136 of the receiving member 132 fixed to the vertical front board 74. By inserting 28- into the receiving portion 136 of the receiving member 134 fixed to the vertical rear substrate 76, it is attached to the upper support frame 6 in a required hole. When installed in this way, as understood from Figure 3,
One end (right end) of the unit frame 90 on the side where the pin 82 is located is rotatably mounted, and the unit frame 90 is attached to the support bins 96 and 98 (in the front-rear direction substantially parallel to the first pivot axis). It is pivotable in the closing direction shown by arrow 150 (FIG. 3) and in the opening direction shown by arrow 152 (FIG. 3) about the extending second pivoting center axis.

A restricting means 154 is interposed between the upper support frame 6 and the unit frame 90 rotatably mounted on the upper support frame 6 as described above. In the illustrated example, the restricting means 154 is disposed on the front side of the front wall 92 and the rear side of the rear wall 94 of the unit frame 90. Each of the restricting means 154 is connected to a first connecting member 158 having a hole 156 formed at one end thereof.
and a second connecting member 160 whose -end is pivotally connected to the other end of the first connecting member 158, and a locking notch 162 is provided at the other end of the second connecting member 160. □ is formed. Mainly referring to FIG. 5, the unit frame 90
In the restricting means 154 arranged on the front side of the front wall 92 of
The other end of the second connecting member 160 connects the locking notch 162 to the front wall 9 of the unit frame 90.
The unit frame 90 is rotatably connected to the unit frame 90 by engaging with a locking groove 109 of a locking pin 106 implanted in the unit frame 90 . A threaded coil spring 164 is fitted into the inner protrusion of the support member 140, one end of the coil spring 164 is locked in a notch 163 formed at one end of the first connecting member 158, and the other end is locked to the vertical front substrate 74 of the upper support frame 6. Further, in the restricting means 154 disposed on the rear side of the rear wall 94 of the unit frame 90, one end of the first connecting member 158 has a hole 156 attached to the vertical rear substrate 76 of the upper support frame 6. support member 142
The other end of the second connecting member 160 has a locking notch 162 embedded in the rear wall of the unit frame 90. It is rotatably connected to the unit frame 90 by engaging with the locking groove of the locking pin 108.

A threaded coil spring 16 is also attached to the inner protrusion of the support member 142.
6 is fitted, one end side of this coil spring 166 is locked in a notch 163 formed at one end part of the first connecting member 158, and the other end side is locked in the vertical rear substrate 76 of the upper support frame 6.
It is locked to. The torsion coil springs 164 and 166 described above act to cause each 31-first connecting member 158 to pivot counterclockwise in FIG. 3 about the support members 140 and 142.

Each of the limiting means 154 has a stopping means.

The illustrated stop means consists of six stop pieces 168 integrally formed at one end of the second connecting member 160 (FIGS. 3 and 4). This stop piece 168 is connected to the first connecting member 1
58, the second connecting member 160 is rotated counterclockwise in FIG. 3 to achieve a predetermined relative angle relationship (
In the specific example, the first connecting member 158 and the second connecting member 1
60 are in a straight line) and the side surface of the other end of the first connecting member 158 to prevent the second connecting member 160 from pivoting beyond a predetermined relative angular relationship. Because of this type of passage, the unit frame 90 attached to the upper support frame 6 is shown in FIG. It is pivotable between an active position shown by a dotted chain line and a non-active position shown by a solid line in FIG.

The unit frame 90, which is rotatably mounted on the upper support frame 6 as described above, is connected to the drum support shaft 170 [FIGS. 5 and 6].
(see figure) so as to be held in the operating position. Mainly referring to FIG. 6, the drum support shaft 170 has a raw portion 170 whose cross section is circular, an enlarged head 170b is provided at one end of the main portion 170a, and the other end has a substantially circular cross section. A rectangular locking portion 170c is provided. An annular groove 172 is formed on the circumferential surface of one end of the main portion 170a. On the other hand, in relation to the drum support shaft 170, the vertical front substrate 74 of the upper support frame 6
A locking means is provided on the front surface of the holder. The illustrated locking means is a locking piece 174 rotatably mounted on the vertical front board 74.
This locking piece 174 is provided with an operating portion 174a at one end and a substantially semicircular locking portion 174b on the lower surface of the center (see also FIG. 2). )
.

A threaded coil spring 1.76 (Fig. 2) is interposed between this locking piece 174 and the vertical front board 74. It acts so as to rotate in the direction (clockwise when viewed from the right in FIG. 2).

In addition, a stop pin 178 (FIG. 2) is planted on the front surface of the vertical front board 74, and the stop pin 178 (FIG. 2) comes into contact with one end of the locking piece 174 and prevents the locking piece from rotating in the clockwise direction. 1
The locking portion 174b of 74 is engaged with the groove 172 formed in the drum support shaft 170 when the drum support shaft 170 is installed in a required hole.

The electrostatic copying machine described above further includes a locking means 18 for releasably locking the unit frame 90 in the operating position.
0 is set. Referring to FIGS. 3 and 4, the illustrated locking means 180 is further explained as comprising a combination of a locking shaft 182 and a locking member 184 that engages and disengages from the locking shaft 182. Then, in the specific example, the locking shaft 182 is fixed between the vertical front substrate 74 and the vertical rear substrate 76 of the upper support frame 6 (see also FIG. 2). On the other hand, the locking member 184 is provided on the unit frame 90. The locking member 184 has an intermediate portion 184 & arm portions 184b extending upward from both ends of the intermediate portion, and a retaining portion 184C is provided at the tip of each arm portion 184b. Each arm portion 184b of the locking member 184 is rotatably attached to a shaft member 186 fixed between the front wall 92 and the rear wall 94 of the unit frame 90.

A torsion coil spring 188 is fitted in the middle part of the shaft member 186. One end of the spring 188 is engaged with the device housing 116 of the cleaning device 28, and the other end is engaged with the locking member 184. Middle part 184m
is in contact with the inner surface of As described above, the locking member 184 is biased clockwise in FIG. 2 (more specifically, clockwise when viewed from the lower right) by the action of the screw coil spring 188, and is normally biased against the inner surface of the arm portion 184b. is held in contact with the upper edge of the device housing 116.

The engaging portion 184c of the locking member 184 is connected to the locking shaft 1.
82.

Next, the procedure for attaching the rotating drum 12 and the unit frame 90 will be explained with reference mainly to FIGS. 3 to 6. To attach the rotating drum 12 and the unit frame 90, first, unlock the locking means (not shown) provided on the lower support frame 4 and the upper support frame 6, and then move the upper support frame 6 in the direction indicated by the arrow 84. It is opened in the opening direction shown in FIGS. 1 to 3 to the open position shown in FIG.

Next, the rotating drum 12 is attached to the unit frame 90 in the detached state.
Attach it removably. This installation is carried out on the rotating drum 120.
This is achieved by inserting the support members 124 and 126 at both ends into recesses 100 provided in the front wall 92 and rear wall 94 of the unit frame 90 from above, and when installed in this manner, the rotating drum 12 It is rotatably supported between 94.

In such a mounted state, the front wall 92 of the unit frame 90
and a shaft hole 102 formed in the rear wall 94 and a rotating drum 12
The axial holes 128 and 130 formed in the support members 124 and 126 of the support members 124 and 126 are substantially linearly aligned. Further, the upper edge of the rotating drum 12 is positioned in a notch formed in the front wall 92 and rear wall 94 of the unit frame 90, as shown in FIG.

Next, the unit frame 90 to which the rotating drum 12 is attached is detachably attached to the upper support frame 6.

Such mounting is performed by attaching the support bin 96 implanted to the front wall 92 of the unit frame 90 to the receiving member 1 fixed to the vertical front board 74.
32 and the support bin 98 implanted in the rear wall 94 of the unit frame 90 is inserted into the receiving part 136 of the receiving member 134 fixed to the vertical rear board 76, and A locking bottle 106 installed in the wall 92
The locking groove 109 of the locking groove 109 is engaged with the locking notch 162 formed in the second connecting member 160 of the front restricting means 154, and the locking pin 1 is implanted in the rear wall 94 of the unit frame 90.
This is achieved by engaging the locking groove 08 with the locking notch 162 formed in the second connecting member 160 of the rear restricting means 154. When installed in this way, the unit frame 90
is held in the non-operating position shown in solid lines in FIGS. 3 and 5 by the action of the limiting means 1540 (in FIG. 5, the w unit 88 including the rotating drum 12, cleaning device 28 and unit frame 90 is simplified) ).

That is, in this way, the first connecting member 1 of the limiting means 154
58 and the second connection member 160 are held in a predetermined relative angular relationship (in the specific example, a - straight line relationship) shown by solid lines in FIGS. 3 and 7, and from this predetermined relative angular relationship, the first connection A counterclockwise pivoting of the second connecting member 160 relative to the member 158 in FIGS. 3 and 7 is prevented by the action of the stop piece 168, and thus the unit frame 9
0 is held in the non-active position. In this non-operating position, the recesses 100 provided in the front wall 92 and the rear wall 94 of the unit frame 90 open obliquely upward to the left in FIG.

When installing the rotating drum 12 and unit frame 90,
As will be easily understood from the description below, the unit frame 90 may be attached to the upper support frame 6 after the rotating drum 12 is attached to the unit frame 90 as described above. Instead of this, unit frame 90
may be removably attached to the upper support frame 6, and then the rotating drum 12 may be attached to the unit frame 90.

Next, the unit frame 90 is moved in the closing direction shown by the arrow 150 (FIG. 3) around the support bins 96 and 98 to the operating position shown by the two-dot chain line in FIGS. 3 and 5. When the unit frame 90 is moved to close, the screw coil springs 164 and 166 act to rotate the first connecting member 158 counterclockwise in FIG. 3 in the needle direction around the supporting members 140 and 142, Therefore, the closing movement becomes smooth. When the unit frame 90 is positioned at the operating position, the engaging portion 184C of the locking member 184 engages with the locking shaft 182 to enter the locked state, and the action of the torsion coil spring 188 causes the locked state 40- to be established. The unit frame 90 is thus held in the operating position. In this operating position, as can be easily understood from FIG. Front wall 92 and rear wall 94 of 90
The shaft hole 102 formed in the rotary drum 12, the shaft holes 128 and 130 formed in the support members 124 and 126 of the rotary drum 12, and the inner end surface of the rotary shaft 144 mounted on the vertical rear substrate 76 of the upper support frame 6. The formed recess 148 (FIG. 2) is substantially aligned in the front-back direction, and then the upper support frame 6 is moved in the closing direction shown by the arrow 86 (FIGS. 1 to 3). and place it in the closed position shown in FIG. 6 (the position shown by the solid line in FIG. 1). When placed in this position,
Locking means (not shown) provided on the lower support frame 4 and the upper support frame 6 are locked, and the upper support frame 6 is thus held in the closed position.

Next, as shown in FIG. 6, the locking piece 174 is rotated slightly counterclockwise in FIG. The shaft hole of the vertical front substrate 74 of the support frame 6, the shaft hole 1022 of the front wall 92 of the unit frame 90, the shaft hole 128 of the support member 124 of the rotating drum 12. a shaft hole 130 of the support member 126;
and inserted into the recess 148 of the rotating shaft 144 through the shaft hole 102 of the rear wall 94 of the unit frame 90. When inserted in this manner, the rotating drum 12 is rotatably supported between the vertical front substrate 74 and the vertical rear substrate 76 of the upper support frame 6 via the drum support shaft 170, and is further supported at the other end of the drum support shaft 170. The locking portion 170C is positioned in the shaft hole 130 of the support member 126 of the rotary drum 12 and the recess 148 of the rotary shaft 144, and thus the rotary shaft 144 and the gear 146 are fixed via the drum support shaft 170. A rotating drum 12 is drivingly connected thereto. The gear 146 is drivingly connected to a drive source (not shown) via an appropriate transmission means when the upper support frame 6 is placed in the closed position. Further, the holding of the locking piece 174 is released to set it in the locked state. As a result, the locking piece 174 is rotated clockwise in FIG. 3 by the action of the threaded coil spring 176 (FIG. 2).
The locking piece 174 is held in a locked state in which the locking portion 174b engages with the groove 172 of the drum support shaft 170, thus reliably preventing the drum support shaft 170 from coming off.

In the above-described operation, the drum support shaft 170 is inserted after the upper support frame 6 is in the closed position, but instead of this, the drum support shaft 170 is inserted when the upper support frame 6 is in the open position. may be inserted, and then the upper support frame 6 may be placed in the closed position.

43- When the rotating drum 12 and the unit frame 90 are removably attached to the upper support frame 6 as described above, each component is maintained in the positional relationship shown in FIG. 1, and is ready for copying. .

The rotating drum 12 mounted as described above can be removed from the upper support frame 6 in the following manner.

To detach, first release the locking means (not shown) provided on the lower support frame 4 and the upper support frame 6, and move the upper support frame 6 in the direction indicated by the arrow 84 (FIGS. 1 to 3). It is opened in the opening direction shown by to bring it to the open position shown in FIG.

Next, the locking piece 174 is turned to the released state as described above, and the drum support shaft 170 is removed from the upper support frame 6.

In this way, the connection state between the gear 146 and the rotating drum 12 is released, and the rotating drum 12 is connected to the front wall 9 of the unit frame 90.
2 and the recess 100 formed in the rear wall 94 (instead of the above-mentioned operation 44-, after removing the drum support shaft 170, the upper support frame 6 is brought to the above-mentioned open position). ). Next, the intermediate portion 184a of the locking member 184 is pressed to release the engagement between the locking portion 184C and the locking shaft 182, and the unit frame 90 is opened in the opening direction shown by the arrow 152 (FIG. 3). let In this way, the unit frame 90 is attached to the support pin 9
Upper support frame 6 shown by arrow 84 centered on 6 and 98
(At this time, the first connecting member 158 of the restricting means 154 is pivoted clockwise in FIG. 3 about the supporting members 140 and 142.) 3 and the second connecting member 160 is pivoted counterclockwise in FIG. When it is turned, the stop piece 168 provided on the second connecting member 160 of the limiting means 154 comes into contact with the first connecting member 158 (the seventh
(see figure). This prevents the second connecting member 160 from pivoting relative to the first connecting member 158, thereby preventing the unit frame 90 from opening in the direction indicated by the arrow 152, and thus allows the unit frame 90 to connect to the rotating drum 12 and cleaning The unit containing device 128 is held in the inactive position by its own weight. In this non-operating position, as described above, the front wall 9 of the unit frame 90
2 and the recess 100 provided in the rear wall 94 opens diagonally upward to the left in FIG. After that, the notches 10 formed in the front wall 92 and rear wall 94 of the unit frame 90
4, grip the upper edges of both ends of the rotating drum 120, and insert the rotating drum 12 into the recesses 1 provided in the front wall 92 and the rear wall 94.
00 to the left diagonally upward in FIG. 3, that is, diagonally upwardly moving away from the bin 82 constituting the first pivot axis. Thus, the rotating drum 12
is detached from the unit frame 90 in the non-operating position through the openings between the lower support frame 4 and the upper support frame 6 in the open position, and the rotating drum 12 can be easily removed from the upper support frame 6. Therefore, the rotating drum 12 can be easily replaced.

Note that when removing the rotating drum 12 from the unit frame 90, in order to prevent the cleaning blade 26 of the cleaning group [28] from interfering with the circumferential surface of the rotating drum 12, the front wall 92 and the rear wall 94 of the unit frame 90 are removed. recess 100
It is preferable to configure the structure so that it is inclined at a predetermined angle with respect to the vertical direction.

Furthermore, the unit frame 90 mounted as described above is
It can be removed from the upper support frame 6 as follows. That is, first, by operating as described above, the upper support frame 6 is brought to the open position 47-, and the unit frame 90 is brought to the non-operating position. Next, the second connecting member 160 of the descendant restriction means 154, which has lifted the unit 88 slightly upward, is slightly rotated clockwise in FIGS. 3 and 7, and the unit frame 90
The engagement between the locking pin 106 implanted in the front wall 92 and the locking pin 108 implanted in the rear wall 94 and the locking notch 162 of the second connecting portion 160 is released. After that, the unit 88 is attached to the receiving members 132 and 134 provided on the vertical front substrate 74 and the vertical rear substrate 76 of the upper support frame 6.
along the receiving part 136. In this way, the support bins 96 and 98 provided on the front wall 92 and rear wall 94 of the unit frame 90 are moved in the direction indicated by the arrow 190 through the position indicated by the two-dot chain line, as shown in FIG. is member 1
32 and 134 from the receiving parts 136. Thus, the unit frame 90 is separated from the upper support frame 6, and the unit frame 90 can be easily removed from the upper support frame 6, and the cleaning device 28 can be easily repaired. As is easily understood, the unit frame 90 can be removed with the rotating drum 12 attached to the unit frame 90 or with the rotating drum 12 removed from the unit frame 90.

Next, a second specific example of an electrostatic copying machine constructed according to the present invention will be described with reference to FIGS. 9 to 14. Hereinafter, the same members as in the first specific example are given the same numbers.

Referring to FIGS. 9 and 10, the illustrated electrostatic copying machine includes a housing 2 having a substantially rectangular parallelepiped shape. It is defined by an upper support frame 6 which is pivotably mounted via a first pivoting member extending in the direction (constituting the center axis). In this second specific example as well, the rotating drum 12 and the cleaning device #28 are configured as a unit, and this unit is configured to be detachably attached to the upper support frame 6.

10 and 11, the unit generally designated 88 includes a unit frame 90. As shown in FIGS. The unit frame 90 has a front wall 92 and a rear wall 94 arranged at intervals in the front-rear direction (direction perpendicular to the plane of paper in FIG. 10, direction from the lower left to the upper right in FIG. 11), Each of the front wall 92 and the rear wall 94 is
The left part is formed into a substantially rectangular shape, and the right part is formed into a substantially circular shape. A support protrusion 92 is provided at the right end of the front wall 92 and the rear wall 94.
A and 94m are provided, and a support pin 96 constituting a part of the rotatable mounting means is implanted on the front surface of the support protrusion 92m, and a support pin 96 constituting a part of the rotatable mounting means is installed on the rear surface of the support protrusion 94m. A pin 98 is implanted. On the rear surface of the front wall 92 and on the front surface of the rear wall 94, a substantially U-shaped recess 100 (in FIG.
(Only the recess formed in is shown) is provided. A rectangular notch 104 is formed at the upper end of each recess 100,
An inclined surface 100m (only one of which is shown in FIG. 11) is defined at the upper end of the end surface of the recess 100 and is inclined outwardly and upwardly. A shaft hole 102 is provided at the bottom of the recess 100.
Each of the shaft holes 102 passes through a protrusion 111 provided on the front surface of the front wall 92 and a protrusion (not shown) provided on the rear surface of the rear wall 94, respectively. ing. A cleaning device 28 having substantially the same configuration as the first specific example is installed between the front wall 92 and the rear wall 94 described above. In the second specific example, a supported piece is provided in place of the limiting means in the first specific example. In the illustrated example, the supported pieces 51 are provided on the front wall 92 and rear wall 94 of the unit frame 90, and one supported piece is composed of a hanging piece 192 provided at the lower left end of the front wall 92. The other supported piece is composed of a hanging piece 194 (see FIG. 12) provided at the lower left end of the rear wall 94.

The rotating drum 12 is detachably attached to the unit frame 90. The illustrated rotating drum 12 has substantially the same configuration as that of the first specific example, and has a support member 124 having a circular shaft hole 128 and an elongated shaft hole on the outer surface of its side walls 122a and 122b. Support member 1 with 130
26 is installed. This rotary drum 12 is rotatably mounted on the unit frame 90 by inserting support members 124 and 126 mounted on both ends thereof into recesses 100 in the front wall 92 and rear wall 94 from above.

The unit frame 90 described above is detachably attached to the upper support frame 6 at 52-. Referring to FIG. 9, a receiving member 132 (FIG. 11) constituting a part of the rotatable mounting means is fixed to the rear surface of the vertical front substrate 74 of the upper support frame 6.
A receiving member 134 (FIGS. 9 and 11), which constitutes a part of the pivotable mounting means, is fixed to the front surface of the vertical rear board 76. A receiving portion 136 is provided on the inner surface of the receiving members 132 and 134. The receiving portion 136 extends from the opening located at the left end to the upper right side and further extends to the lower right side (see also FIG. 14). In the second embodiment, as can be easily understood from a comparison with FIG. 8, the inclinations of the receiving portions 136 of the members 132 and 134 are larger than in the first embodiment.

The unit frame 90 has support pins 96 implanted in the front wall 92.
The receiving part 1 of the receiving member 132 fixed to the vertical front board 74
36, by inserting the support pins 98 implanted in the rear wall 94 into the receiving portions 136 of the receiving members 134 fixed to the vertical rear substrate 76, the upper support frame is assembled as shown in FIGS. 10 and 12. 6 is removably attached. When mounted in this manner, one end (right end) of the unit frame 90 on the side where the bin 82 is located is mounted so as to be freely pivotable, and the unit frame 90 supports the support bins 96 and 98 (which constitutes a second pivot axis extending in the front-rear direction). It is pivotable in the closing direction shown by arrow 150 (FIG. 10) and in the opening direction shown by arrow 152 (FIG. 10) about the center. On the other hand, between the vertical front substrate 68 and the vertical rear substrate 70 of the lower support frame 4, as shown in FIG.
A guide plate 53 is provided. A plurality of elongated openings are formed in the guide plate 53 at intervals in the front-rear direction.
An endless conveyor belt 55 of the conveyor belt mechanism 52 is disposed within this opening. Since this is a through hole, the guide plate 53 is connected to the hanging pieces 192 and 1 provided on the unit frame 90.
When the unit frame 90 is mounted as described above, the hanging pieces 192 and 194 of the unit frame 90 are moved by the weight of the unit 88 itself to the front end 53m and rear end 53b of the guide plate 53. The unit frame 90 is in contact with the upper surface of the unit frame 90 in FIGS.
It is held in the non-active position shown in the figure.

A unit frame 90 rotatably attached to the upper support frame 6
When the drum support shaft 170 (FIGS. 11 and 13) is brought into the operating position (the operating position), the rotary drum 12 and the cleaning device 28 mounted on the unit frame 90 are mounted on the upper support frame 6. The charging corona discharger 16, the developing device 30, etc. are configured to be held in the positional relationship shown in FIG. The configuration of this drum support shaft 170 is substantially the same as that of the first specific example. The other configurations of the electrostatic copying machine of the second specific example are also substantially the same as those of the first specific example, so a description thereof will be omitted.

55- Next, referring mainly to FIGS. 10 to 13, the rotating drum 12 and unit frame 90 in the second specific example will be described.
This section describes the installation procedure. To attach the rotating drum 12 and the unit frame 90, first, unlock the locking means (not shown) provided on the lower support frame 4 and the upper support frame 6, and then move the upper support frame 6 in the direction indicated by the arrow 84. It is opened in the opening direction shown in FIGS. 9 and 10 to the open position shown in FIG. 3 (the position shown in FIG. 9).

Next, the rotating drum 12 is attached to the unit frame 90 in the detached state.
Attach it removably. This installation is carried out on the rotating drum 120.
This is achieved by inserting the supporting members 124 and 126 at both ends into recesses 100 provided in the front wall 92 and rear wall 94 of the unit frame 90 from above, and when thus installed, the rotating drum 12 is mounted on the front wall 92 and rear wall 94. It is rotatably supported in between.

In this installed state, the shaft holes 102 formed in the front 56-wall 92 and rear wall 94 of the unit frame 90 and the shaft holes 1 formed in the support members 124 and 126 of the rotating drum 12
28 and 130 are brought into substantially-linear alignment. Further, the upper edge of the rotating drum 12 is positioned in a notch formed in the front wall 92 and rear wall 94 of the unit frame 90, as shown in FIG.

Next, the unit frame 90 to which the rotating drum 12 is attached is detachably attached to the upper support frame 6.

Such mounting is performed by connecting the support pin 96 implanted in the front wall 92 of the unit frame 90 to the receiving member 1 fixed to the vertical front board 74.
32 and the support pin 98 implanted in the rear wall 94 of the unit frame 90 is inserted into the receiving part 136 of the receiving member 134 fixed to the vertical rear board 76. Then, the unit frame 90 is held in the non-operating position shown in FIGS. 10 and 12. That is, in this way, the hanging piece 192 provided on the front wall 92 of the unit frame 90 and the hanging piece 194 provided on the rear wall 94
are placed on the upper surfaces of the front end 53m and rear end 53b of the guide plate 53, and the unit frame 90 is prevented from turning counterclockwise in FIG.
0 is held in the non-active position. In this non-operating position, the front wall 92 and rear wall 9 of the unit frame 90
The recess 100 provided in 4 is similar to the first specific example.
In FIG. 10, it opens diagonally upward to the left.

When installing the rotating drum 12 and unit frame 90,
As will be easily understood from the description below, the unit frame 90 may be attached to the upper support frame 6 after the rotating drum 12 is attached to the unit frame 90 as described above; however, instead of this, Alternatively, the unit frame 90 may be detachably attached to the upper support frame 6, and then the rotating drum 12 may be attached to the unit frame 90.

Next, the upper support frame 6 is aligned with the arrow 86 (FIGS. 9 and 10).
It is moved in the closing direction shown in FIG. 13 to the closed position shown in FIG. When the unit frame 90 is placed in the closed position, one end (right end) of the unit frame 90 is lowered in response to the closing movement of the upper support frame 6, as understood from FIG. The hanging pieces 192 and 194 provided at the other end (left end) can be slid to the left in FIG. 10 on the upper surface of the guide plate 53 without separating from the upper surface. Then, when the closing movement is made to the closed position, the locking means (not shown) provided on the lower support frame 4 and the upper support frame 6 are in a locked state, and the upper support frame 6 is in the 13th position. It is held in the closed position as shown in the figure. In this closed position, the shaft hole defined in the vertical front substrate 74 of the upper support frame 6 (in the specific example, the hole 138 of the support member 59-140) and the front wall 92 and the rear wall 94 of the unit frame 90 are connected to each other. shaft holes 102 formed in the support members 124 and 126 of the rotating drum 12, shaft holes 128 and 130 formed in the support members 124 and 126 of the rotating drum 12, and an inner end surface of the rotating shaft 144 mounted on the vertical rear substrate 76 of the upper support frame 6; A recess 148 (
9) are substantially aligned in the front-back direction.

After that, as shown in FIG.
Turn the drum support shaft 170 slightly counterclockwise in FIG.
Axial hole 1021 in front wall 92 of unit frame 90 Rotating drum 1
The shaft hole 128 of the support member 124 of No. 2. The shaft hole 130 of the support member 126 and the shaft hole 102 of the rear wall 94 of the unit frame 90
through and into the recess 148 of the rotating shaft 144. When inserted in this manner, the rotating drum 12 is rotatably supported between the vertical front substrate 74 and the vertical rear substrate 76 of the upper support frame 6 via the drum support shaft 17060-.
On the other end side of 70, the locking portion 170C is connected to the rotating drum 1.
The drum support shaft 1 is positioned within the shaft hole 130 of the support member 126 of the drum support member 1
The rotary shaft 144 and the rotary drum 12 are drivingly connected via the rotary shaft 70 . The unit frame 90 also has a drum support shaft 170.
and held in the working position. Furthermore,
The holding of the locking piece 174 is released to put it in a locked state.

In this way, the locking piece 174 is attached to the threaded coil spring 176 (
9), the locking piece 174 is rotated counterclockwise in FIG. 10, and the locking piece 174 is held in a locked state in which the locking portion 174b engages with the groove 172 of the drum support shaft 170.
In this way, detachment of the drum support shaft 170 is reliably prevented. In the second specific example as well, the gear 146 is drivingly connected to a drive source (not shown) via an appropriate transmission means when the upper support frame 6 is placed in the closed position.

When the rotating drum 12 and the unit frame 90 are removably attached to the upper support frame 6 as described above, the respective components are substantially in the positional relationship shown in FIG. It is maintained in the same positional relationship and becomes ready for copying.

In the above-described mounted state, the upper support frame 6 is moved in the direction of the arrow 84 (
When the rotating drum 12 and the unit frame 90 are opened (or closed) in the opening direction (or closing direction) shown in
moves together with the upper support frame 6, and therefore, when the unit frame 90 is opened, the hanging pieces 192 and 194 provided on the unit frame 90 are separated from the upper surface of the guide plate 53.

The rotating drum 12 mounted as described above can be removed from the upper support frame 6 in the following manner. That is, the locking piece 174 is turned to the released state, and the drum support shaft 170 is pulled out from the upper support frame 6. In this way, the connection state between the gear 146 and the rotating drum 12 is released, and the rotating drum 12 is connected to the front wall 92 and the rear wall 94 of the unit frame 90.
It is in a state where it is supported by a recess 100 formed in. Further, the restriction of the unit frame 90 to the above-mentioned operating position is released,
The unit frame 90 is in a state where it can freely pivot around the support pins 96 and 98. Then locking means (not shown)
, and move the upper support frame 6 in the direction of arrow 84 (Fig. 9, 10).
10 and 12. During this opening movement, as can be seen from FIG. Accordingly, the hanging pieces 192 and 194 provided at the other end of the unit frame 90 are held in contact with the upper surface of the guide plate 53 by the weight of the z knit 88 itself, and the upper support frame body In response to the opening movement of the upper support frame 6, the unit frame 90 is slid to the right in FIG. It is opened relative to the upper support frame 6 in the opening direction shown by arrow 152, which is the opposite direction to the opening direction shown by arrow 84. and,
When the upper support frame 6 is thus opened and brought to the open position, the unit frame 90 is brought to the non-operating position as shown in FIGS. 10 and 12.

In such a non-operating position, as mentioned above,
A recess 100 formed in the front wall 92 and rear wall 94 of the unit frame 90 opens diagonally upward to the left in FIG. 10. After that, the front wall 92 and the rear wall 9 of the unit frame 90
4. Grip the upper ends of both ends of the rotating drum 12 through the notches 104 formed in the upper part of the rotating drum 12, and move the rotating drum 12 diagonally to the left in FIG. A pin 82 constituting the first pivot axis in the upward direction, that is, in the upward direction.
Make it rise diagonally upward, away from the object. When this is done, the rotating drum 12 is separated from the unit frame 90 in the non-operating position as shown by the two-dot chain line in FIG.
Thus, the lower support frame 4 and the upper support frame 6 in the open position
The rotating drum 12 can be easily taken out through the opening, and the rotating drum 12 can be easily replaced.

Furthermore, the unit frame 90 mounted as described above is
It can be removed from the upper support frame 6 as follows. That is, by operating as described above, the upper support frame 6 is brought to the open position, and the unit frame 90 is brought to the non-operating position.

Next, the unit 88 is attached to the vertical front substrate 7 of the upper support frame 6.
4 and vertically along the receiving portions 136 of the receiving members 132 and 134 provided on the rear substrate 76. In this way, the support pins 96 and 98 provided on the front wall 92 and rear wall 94 of the unit frame 90 are moved in the direction shown by the arrow 196 through the position shown by the two-dot chain line, as shown in FIG.
The receivers disengage from receivers 136 of members 132 and 134. In this way, the unit frame 90 is separated from the upper support frame 6, and the unit frame 90 can be easily removed from the upper support frame 6, and the cleaning device 128 can be easily repaired. As is easily understood, detachment of the unit frame 90 means that the rotating drum 12 is removed from the unit frame 90.
This can be done with the rotating drum 12 attached to the unit frame 90 or with the rotating drum 12 removed from the unit frame 90.

Although the electrostatic copying machine constructed according to the present invention has been described above, the present invention is not limited to such specific examples, and various modifications and changes can be made without departing from the scope of the present invention.

For example, in the first specific example, the locking member 184 of the locking means 180 is rotatably mounted, but instead of this, the locking shaft 182 is movably mounted and the locking shaft 184 is rotatably mounted.
The lock may be freely released by moving 82.

Further, for example, in the first specific example, each limiting means 1
54, one end side of the first connecting member 158 is connected to the upper support frame 6
is pivotally attached to support members 140 and 142 attached to the vertical front substrate 74 and the vertical rear substrate 76, but if desired, the rear surface of the vertical front substrate 74 and the vertical rear substrate 76 may be A support pin may be provided on the front surface and the device may be pivotably attached to the support pin.

Furthermore, for example, in the specific example of M2, the unit frame 9
Although the guide plate 53 for guiding the copy paper is used as a support member against which the hanging pieces 192 and 19467- provided at You can also do this.

[Brief explanation of drawings]

FIG. 1 shows the first part of an electrostatic copying machine constructed in accordance with the present invention.
FIG. 3 is a simplified cross-sectional view showing a specific example. 2 is a partially omitted perspective view showing the electrostatic copying machine shown in FIG. 1 with the housing opened; FIG. 3- is a simplified diagram for explaining opening and closing movements of the upper support frame and unit frame of the electrostatic copying machine of FIG. 1; FIG. 4 is an exploded perspective view showing a unit of the electrostatic copying machine of FIG. 1 and parts related thereto, partially exploded. FIG. 5 is a simplified view of the WJa diagram viewed from the v-v line. FIG. 6 is a perspective view showing the state in which the upper support frame 68- of the electrostatic copying machine of FIG. 1 is brought to the closed position and the drum support shaft is inserted. FIG. 7 is a view showing a portion of the limiter stage of the electrostatic copying machine of FIG. 1 and a locking pin engaged therewith. FIG. 8 is an end view showing a receiving member of the electrostatic copying machine of FIG. 1 and a support pin received in the receiving member. FIG. 9 shows a second section of an electrostatic copying machine constructed in accordance with the present invention.
FIG. 6 is a partially omitted perspective view showing a state in which the housing is opened in the specific example. FIG. 10 is a simplified diagram for explaining opening and closing movements of the upper support frame and unit frame of the electrostatic copying machine shown in FIG. 9. FIG. 11 is a partially exploded perspective view showing the unit and related parts of the electrostatic copying machine shown in FIG. 9; FIG. 12 is a perspective view showing the upper support frame of the electrostatic copying machine of FIG. 9 in an open position. FIG. 13 is a perspective view showing a state in which the upper support frame of the electrostatic copying machine shown in FIG. 9 is brought to the closed position and the drum support shaft is inserted. FIG. 14 is an end view showing a receiving member of the electrostatic copying machine of FIG. 9 and a support pin received in the receiving member. 2...Housing 4...Lower support frame 6...Upper support frame 12...Rotating drum 28...Cleaning device 53...Guide plate 82...Pin (first pivot center) axis) 88 and 88・
...Unit 90...Unit frames 96 and 98...Support pin (second pivot axis) 132 and 134...Receiver is member 154...Limiting means 170...Drum support shaft 180...・Lock means 192 and 194 River hanging piece Patent applicant: Mita Kogyo Co., Ltd. Figure 7 Figure 8 Figure 14

Claims (1)

[Claims] 1. A lower support frame, and one end of the lower support frame is attached to the lower support frame so as to be pivotable between an open position and a closed position about a first pivot axis extending in the front-rear direction. and a unit mounted on the upper support frame, the unit having a unit frame and a photoreceptor on its peripheral surface, and the unit having a photoconductor on the unit frame and a peripheral surface of the z knit, and a unit mounted on the upper support frame. In an electrostatic copying machine including a rotating drum; one end of the core unit frame located on the first rotation center axis side is connected to a second rotation axis extending substantially parallel to the first rotation center axis; a pivotable attachment means for pivotably attaching the unit frame to the upper support frame around the center axis IiI; and a locking means for releasably locking the unit frame in a predetermined operating position with respect to the upper support frame. and the operating position of the unit frame about the second pivot axis that is opposite to the opening direction of the upper support frame about the first pivot axis. 1. An electrostatic copying machine, comprising: a restriction means for restricting opening movement from a position to a predetermined non-operating position. 2. The electrostatic copying machine according to claim 1, wherein the rotatable mounting means detachably mounts the one end of the unit frame to the upper support frame. 3. The limiting means includes a first connecting member and a second connecting member, one end of the first connecting member is pivotally connected to the upper support frame, and the other end of the first connecting member is rotatably connected to the upper support frame. one end of the second connecting member is pivotally connected to one end of the second connecting member; the other end of the second connecting member is pivotally connected to the unit; when the first connecting member and the second connecting member open around the second pivot axis.
including a stopping means for stopping the relative rotation between the first connecting member and the second connecting member in a predetermined relative angular relationship; 3. The electrostatic copying machine according to claim 1, wherein opening of the unit frame is restricted to the non-operating position by being stopped. 4. The electrostatic copying machine according to claim 3, wherein the other end of the second connecting member is detachably connected to the unit frame. 5. When the second knitting frame is placed in the non-operating position, the rotating drum can be detached from the second knitting frame by raising it diagonally upward and away from the first rotation center axis. , an electrostatic copying machine according to any one of claims 1 to 4, which is mounted on the unit frame. 6. The upper support frame, the unit frame, and the rotary drum have shafts that are substantially aligned in the front-rear direction when the rotating drum is attached to the unit frame and the unit frame is placed in the operating position. 7. An electrostatic copying machine according to any one of claims 1 to 5, wherein a hole is formed, and a drum support shaft is removably inserted into the shaft hole from the front; The electrostatic copying machine according to any one of claims 1 to 6, wherein the core unit includes a cleaning means attached to the unit frame for removing residual toner from the photoreceptor. . ＆ A lower support frame, and an upper support frame attached to the lower support frame so that one end of the upper support frame can pivot between an open position and a closed position about a first pivot axis extending in the front-rear direction. and a unit attached to the upper support frame, the unit comprising a unit frame and a static drum including a rotating drum having a photoreceptor on its peripheral surface and detachably attached to the unit frame. In an electric copying machine; one end of the unit frame located on the first pivot axis side is pivoted about a second pivot axis that extends substantially parallel to the first pivot axis; a rotatable mounting means that is freely mounted on the upper support frame; a support member provided on the lower support frame; An electrostatic copying machine characterized by comprising: a supported piece that is movably abutted; 9. The electrostatic copying machine according to claim 8, wherein the rotatable mounting means detachably mounts one end of the core 4 of the unit frame to the upper support frame. ], the upper support frame, the double knit frame, and the rotating drum are substantially aligned in the front-rear direction when the rotating drum is attached to the unit frame and the upper support frame is placed in the closed position. A drum support shaft is removably inserted into the shaft hole from the front, and when the drum support shaft is inserted into the shaft hole, the unit frame is inserted into the upper support frame. When the upper support frame is opened from the closed position, the unit frame moves together with the upper support frame, and the supported piece touches the upper surface of the support member. When the drum support shaft is separated from the shaft hole and the upper support frame is opened from the closed position, the one end of the unit frame rises in response to the opening of the upper support frame. the supported piece provided at the other end of the unit frame is slid on the upper surface of the supporting member without separating from the upper surface of the supporting member;
Thus, the unit frame is opened relative to the core upper support frame in a direction opposite to the opening movement of the upper support frame about the second pivot axis, and the upper support frame is in the open position. 10. The electrostatic copying machine according to claim 8, wherein the unit frame is brought to a predetermined non-operating position when the unit frame is pressed. 11. When the unit frame is brought to the non-operating position, the rotating drum can be detached from the unit frame by being raised obliquely upward and away from the first pivot axis; 11. The electrostatic copying machine according to claim 10, wherein the electrostatic copying machine is mounted on the unit frame. p. The unit has a cleaning means attached to the unit frame for removing residual toner from the photoconductor, and the stationary unit according to any one of claims 8 to 11. Electric copying machine.