JPH0694315B2 - Electrostatic copying machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrostatic copying machine, and more particularly to an electrostatic copying machine capable of forming an image on both sides of a copy sheet as needed.

<Background Art> From the standpoint of saving copy paper and reducing the number of documents to be stored, it is often desirable to form images on both sides of the copy paper. Electrostatic copying machines capable of forming images on both sides of paper have been proposed and put into practical use.

A typical example of such an electrostatic copying machine is a copy paper feeding path, copy paper feeding means for feeding a sheet copy paper to the copy paper feeding path, and a copying paper feeding path adjacent to the downstream end of the copying paper feeding path. A transfer control means, a copy paper discharge path extending from an upstream end adjacent to a downstream end of the transfer control means, and a copy paper reverse rotation path extending from an upstream end adjacent to a downstream end of the transfer control means. The copy paper return path extending from the upstream end adjacent to the upstream end of the transfer control means, the copy paper resupply path, and the copy paper returned through the copy paper return path is transferred through the copy paper resupply path to the copy paper transfer path. And a copy sheet retransmitting means for resupplying to the path. The transport control means includes a lower movable guide member and an upper movable guide member that define a copy paper movement path therebetween. The lower movable guide member and the upper movable guide member are in a raised position for connecting the downstream end of the copy paper transport path and the upstream end of the copy paper discharge path, and the downstream end of the copy paper transport path and the copy paper. It is selectively positioned in the lowered position for communicating with the upstream end of the reverse rotation path.

The supporting frame structure of the electrostatic copying machine is a so-called shell structure, that is, a lower supporting frame body and an upper supporting frame body mounted on the lower supporting frame body so as to be rotatable between an operating position and a non-operating position. Conveniently the structure comprises. In this case, at least most of the copy paper transport path and the copy paper discharge path are between the lower support frame and the upper support frame when the upper support frame is located in the working position. It is defined and is opened when the upper support frame is brought to the non-acting position. The copy paper reverse rotation path is provided in the upper support frame. At least most of the copy paper return path, the copy paper retransmitting means, and at least most of the copy paper supply path are provided in the lower support frame.

In the electrostatic copying machine as described above, an image is formed on one side of the copy paper while the copy paper supplied from the copy paper supply means to the copy paper transport path is transported through the copy paper transport path. When it is desired to form an image on only one side of the copy sheet, the copy sheet having the image formed on one side has a lower movable guide member and an upper movable guide member which are positioned at the lowered position. It is introduced into the copy paper discharge path through the copy paper moving path between and then discharged through the copy paper discharge path. On the other hand, when it is desired to form an image on both sides of the copy paper, the copying machine having an image formed on one side has a lower movable guide member and an upper movable guide member which are positioned at the raised position. It is introduced into the copy paper reversing path through the copy paper moving path between. Then, after the trailing edge of the copy paper passes the downstream end of the copy paper transport path, the moving direction of the copy paper is reversed, the copy paper is introduced into the copy paper return path, and the copy paper is returned to the copy paper retransmitting means through the copy paper return path. Will be returned. Thereafter, the copy paper is re-supplied from the copy paper retransmitting means to the copy paper conveying path through the copy paper resupply path. Then, an image is formed on the other surface of the copy paper while the copy paper is re-conveyed through the copy paper conveyance path. Thereafter, the copy paper on which images are formed on both sides is introduced into the copy paper discharge path through the copy paper moving path between the lower movable guide member and the upper movable guide member positioned at the lowered position, and then copied. It is discharged through the paper discharge path.

<Problems to be Solved> Therefore, the electrostatic copying machine as described above has the following problems to be solved.

That is, when a paper jam occurs in the copy paper return path (or copy paper retransmitting means or copy paper resupply path), the front surface of the support frame structure (that is, the lower support frame and the upper support frame) is generally covered. The front cover member is opened to expose the front surface of the support frame structure, and then the jammed copy paper is removed. However, when a paper jam occurs in the copy paper return path (or the copy paper retransmitting means or the copy paper resupply path) and the operation of the copy paper is stopped,
In many cases, subsequent copy papers are present in the copy paper transport path. Therefore, before restarting the operation of the electrostatic copying machine,
It is necessary to remove not only the copy paper jammed in the copy paper return path (or copy paper retransmitting means or copy paper resupply path) but also the copy paper existing in the copy paper transport path. However, according to the experience of the present inventors, the operator often forgets to remove the copy paper existing in the copy paper conveyance path and restarts the operation of the electrostatic copying machine, thus causing various inconveniences. .

<Purpose of the Invention> The present invention has been made to solve the above-mentioned inconveniences.
Its main purpose is to expose the front surface of the lower support frame only after opening the upper support frame in a non-acting position and opening at least a large part of the copy paper transport path. It is to provide an excellent electrostatic copying machine.

Other objects of the present invention will be apparent from the following description explained with reference to the accompanying drawings.

<Summary of the Invention> According to the present invention, as an electrostatic copying machine that achieves the above object,
A lower support frame, an upper support frame mounted on the lower support frame so as to be rotatable between an operating position and a non-operating position, a copy paper transport path, and a sheet copy paper on the copy paper transport path. A copy paper supply unit for supplying the copy paper and a copy paper return path, and while the copy paper supplied from the copy paper supply unit to the copy paper conveyance path is conveyed through the copy paper conveyance path. An image is formed on one side of the copy paper, and the copy paper having the image formed on one side is selectively introduced into the copy paper return path and returned through the copy paper return path, and then the copy paper transport path. And an image is formed on the other surface of the copy sheet while being re-fed through the copy sheet conveyance path, and at least most of the copy sheet conveyance path has the upper support frame at the working position. When positioned, the lower support frame and the upper support An electrostatic discharge of a type that is defined between the upper support frame and the lower support frame and is opened when the upper support frame is brought into the non-acting position. In a copying machine; the lower support frame is openable and closable between a closed position that covers at least most of its front surface and an open position that exposes it.
The lower front cover member is attached, and in order to remove the jammed copy paper in the copy paper return path, it is necessary to move the lower front cover member to the open position. Is in the working position, the lower front cover member is prevented from being opened from the closed position to the open position, and when the upper support frame is swung from the working position to the non-working position, There is provided an electrostatic copier characterized in that lower front cover member locking means are provided which allow the lower front cover member to be opened from the closed position to the open position.

<Preferred Specific Example of the Invention> A specific example of the electrostatic copying machine configured according to the present invention will be described in detail below with reference to the accompanying drawings.

General Outline of Electrostatic Copier FIG. 1 schematically shows main components in one specific example of the electrostatic copier constructed according to the present invention. First
The electrostatic copying machine shown in the figure includes a housing 2 having a substantially rectangular shape. On the upper surface of the housing 2, a stationary transparent plate 4 on which a document (not shown) to be copied is placed, and an openable and closable document for covering the transparent plate 4 and the document placed on the transparent plate 4. A pressing member 6 is provided.

A rotary drum 8 having an electrostatic photosensitive member on its peripheral surface is rotatably mounted in a substantially central portion of the housing 2. Arrow
Around the rotary drum 8 which is rotationally driven in the direction shown by 10, the charging area 12 and the exposure area are sequentially provided when viewed in the direction shown by the arrow 10.
14, a development area 16, a transfer area 18 and a cleaning area 20 are defined. The charging area 12 is provided with a charging corona discharger 22, the developing area 16 is provided with a developing device 24, and the transfer area 18 is provided with a transfer corona discharger 26 and a peeling corona discharger 28. The cleaning area 20 is provided with a charge eliminating lamp 30 and a residual toner removing blade 32.

Above the rotary drum 8, an optical system generally designated by the numeral 34 is arranged. This optical system 34 is a movable document illumination lamp.
36, a first movable reflecting mirror 38, a second movable reflecting mirror 40, a third movable reflecting mirror 42, a stationary lens assembly 44 and a stationary reflecting mirror 46. During scanning exposure, the movable document illumination lamp 36
The first movable reflecting mirror 38 is moved substantially horizontally from the scanning exposure start position shown by the solid line to a required position (for example, the maximum scanning exposure end position shown by the two-dot chain line) at the required speed V, and the second movable mirror 38 is moved. The reflecting mirror 40 and the third movable reflecting mirror 42 have a speed V / which is half of the required speed from the scanning exposure start position shown by the solid line to a required position substantially horizontally (for example, the maximum scanning exposure end position shown by the two-dot chain line). It can be moved by 2. At this time, the original placed on the transparent plate 4 is illuminated by the movable original illumination lamp 36, and the reflected light from the original is reflected by the first, second and third movable reflecting mirrors 38, 40 and 42. It is sequentially reflected to reach the lens assembly 44, and then the stationary reflecting mirror 46.
And is projected onto the photoconductor in the exposure area 14. When the scanning exposure is completed, the movable original illumination lamp 36 and the first, second and third reflecting mirrors 38, 40 and 42 are returned to the scanning exposure starting position shown by the solid line.

At one end of the housing 2, that is, at the right end in FIG. 1, there is provided copy paper feeding means generally designated by numeral 48. The illustrated copy paper feeding means 48 includes a lower cassette receiving portion 50.
a, an intermediate cassette receiving portion 50b and an upper cassette receiving portion 50c are included. The lower cassette receiving portion 50a, the intermediate cassette receiving portion 50b, and the upper cassette receiving portion 50c each have several types of copy paper cassettes that store sheet copy papers of different sizes.
Any one of 52 is selectively and detachably mounted.
Each of the lower cassette receiving portion 50a, the intermediate cassette receiving portion 50b, and the upper cassette receiving portion 50c has feed rollers 54a, 54b, and 54c for feeding copy sheets one by one from the copy sheet cassette 52 mounted therein. Is provided. The copy paper delivered from the copy paper cassette 52 mounted on the lower cassette receiving portion 50a is introduced into the copy paper transport path indicated by numeral 58 through the copy paper feed path 56a. Intermediate cassette receiver 50
The copy sheet sent from the copy sheet cassette 52 mounted in b is passed through the copy sheet feeding paths 56b and 56a to convey the copy sheet.
Introduced in 58. The copy paper delivered from the copy paper cassette 52 mounted on the upper cassette receiving portion 50c is introduced into the copy paper transport path 58 through the copy paper feed paths 56c, 56b and 56a. The copy paper feeding path 56a is located upstream of the guide plate 60 and the guide plate 6
Copy paper feeding path 56b
Is fixed by a pair of guide plates 64, and the copy paper feeding path
56c is defined by the guide plate pair 66. A pair of feed rollers 68 is arranged between the upstream end of the copy paper feed path 56a and the downstream end of the copy paper feed path 56b.
A feed roller pair 69 is disposed between the upstream end of b and the downstream end of the copy paper feed path 56c.

The copy paper transport path 58 extends substantially horizontally from right to left in FIG. 1 from an upstream end 70 to a downstream end 72. The copy paper transport path 58 is provided at the downstream portion of the guide plate 60 and the guide plate 74.
Downstream part, transport roller pair 76, guide plate pair 78, transport roller pair
80, a guide plate 82, the transfer area 18 (that is, between the rotating drum 8 and the transfer corona discharge 26 and the peeling corona discharge 28), a conveyor belt mechanism 84, a guide plate 86, a heat fixing roller pair 88, a guide plate pair. 90 and the conveying roller pair 92.

A conveyance control means 94 is disposed adjacent to the downstream end 72 of the copy paper conveyance path 58. The conveyance control means 94 includes a lower movable guide member 98 and an upper movable guide member 100 that define a copy paper movement path 96 therebetween. The lower movable guide member 98 and the upper movable guide member 100 are selectively positioned at the lowered position shown by the solid line and the raised position shown by the chain double-dashed line. The transport control means 94 will be described in detail later. A copy paper discharge path 104 having a discharge roller pair 102 is provided on the downstream side of the conveyance control means 94. At the other end of the housing 2, that is, at the left end in FIG.
106 is detachably attached.

Furthermore, the whole number is related to the above-mentioned transfer control means 94.
A copy paper reverse rotation path indicated by 108 and a copy paper return path indicated by reference numeral 110 are provided. The copy paper reverse rotation path 108 defined by the guide plate pair 112 extends in an appropriate curved shape from the upstream end adjacent to the downstream end of the transfer / conveyance control means 94. At the upstream end of the copy paper reversing path 108, a reversing roller 114 that is selectively positioned between a non-acting position shown by a solid line and a working position shown by a two-dot chain line is arranged. The copy sheet return path 110 extends from the upstream end adjacent to the upstream end of the transport control means 94 to the left to the right in FIG. The copy sheet return path 110 is defined by a guide plate pair 116 arranged at the upstream end thereof and a return control mechanism indicated by reference numeral 118 as a whole on the downstream side of the guide plate pair 116. There is. The return control mechanism 118 is disclosed in the specification and drawings of Japanese Patent Application No. 251565 (invention name: electrostatic copying machine, filing date: November 30, 1984) filed by the applicant. It can be configured exactly as shown. As can be easily understood by referring to FIG. 1, the lower movable guide member 98 and the upper movable guide member 10 of the conveyance control means 94.
When 0 is positioned in the lowered position shown by the solid line,
The copy paper conveyance path 58 and the copy paper discharge path 104 are communicated with each other via the copy paper movement path 96 in the conveyance control means 94. On the other hand, the lower movable guide member 98 and the upper movable guide member
When 100 is positioned at the raised position indicated by the chain double-dashed line, the copy paper transport path 58 and the copy paper reverse rotation path 108 are made to communicate with each other via the copy paper moving path 96 in the transport control means 94, and the copy paper is transported. Reverse rotation path 108 and copy paper return path 1
10 and 10 are made to communicate with each other via a copy paper movement path 96 in the conveyance control means 94.

In the illustrated electrostatic copying machine, the copying paper return path is further provided.
Below the 110, copy sheet retransmitting means, which is generally designated by the numeral 120, is provided. The copy sheet retransmitting means 120 has a cradle 122 extending substantially horizontally. Stop means 124 is disposed at the front end of the cradle 122, that is, at the right end in FIG. The stopping means 124 is selectively positioned at either the operating position shown by the solid line or the non-operating position shown by the chain double-dashed line.
A feeding roller 126 is provided on the front end of the pedestal 122. The feeding roller 126 is mounted so as to be able to freely move upward from the position shown in contact with the upper surface of the pedestal 122, and is normally biased by its own weight (suitable spring means if necessary). Forced downward by action.

Further, there is provided a copy paper re-feeding path indicated by reference numeral 128 as a whole, which extends from the front end of the copy paper re-transmitting means 120 to the upstream end 70 of the copy paper conveying path 58. The copying paper feeding path 128 is defined by the guide plate 130, the re-feed roller 132, the re-feed roller pair 134, the guide plate pair 136, and the upstream portion of the guide plate 74.

The outline of the operation of the illustrated electrostatic copying machine as described above is as follows.

The rotary drum 8 is rotated in the direction shown by the arrow 10, and in the charging area 12, the surface of the photoconductor on the rotary drum 8 is charged to a characteristic polarity by the charging corona discharger 26, and in the exposure area 14, it is transparent. The image of the original document placed on the plate 4 is scanned and exposed on the photoconductor by the optical system 34, thus forming an electrostatic latent image on the photoconductor. In the developing area 16, the developing device 24 applies toner to the electrostatic latent image on the photoconductor to develop the electrostatic latent image into a toner image. In the transfer area 18, copy paper conveyed through the transfer area 18 (conveyance of copy paper is further referred to later) is brought into contact with the surface of the photoconductor, and the transfer corona discharger 26 acts on the photoconductor. The toner image is transferred onto the copy paper. Then, the copy paper is peeled from the photoconductor by the action of the peeling corona discharger 28. The peeled copy paper is conveyed to the heat fixing roller pair 88, and the toner image is fixed on the copy paper when passing through the roller pair 88. On the other hand, in the cleaning area 20, the light from the charge-removing lamp 30 is applied to the photoconductor to erase the residual charge on the photoconductor, and the residual toner blade 32 then removes the residual toner from the surface of the photoconductor. It

The conveyance of copy paper will be described below. First, the case where an image is formed on only one side of copy paper will be described. In this case, the lower movable guide member 98 and the upper movable guide member 100 of the transport control means 94 are positioned at the lowered position shown by the solid line. The copy paper introduced from the copy paper cassette 52 mounted on the lower cassette receiving portion 50a, the intermediate cassette receiving portion 50b or the upper cassette receiving portion 50c to the copy paper transporting path 58 is transported through the copy paper transporting path 58. During this time, the toner image is transferred to one surface (that is, the upper surface) of the copy paper in the transfer area 18, and the toner image is fixed on the one surface of the copy paper by the action of the heat fixing roller pair 88, and thus the one surface of the copy paper. An image is formed on. Next, the copy paper is introduced from the copy paper transport path 58 to the copy paper discharge path 104 through the copy paper moving path 96 in the transfer control means 94, and is discharged to the receiving tray 106 through the copy paper discharge path 104.
Thus, a copy having an image formed on one side thereof is obtained.

When images are formed on both sides of a copy sheet, first, the lower movable guide member 98 and the upper movable guide member 94 of the conveyance control unit 94 are first formed.
100 is located in the raised position indicated by the chain double-dashed line. Next, when the copying process is started, the lower cassette receiving portion 50a,
The copy sheet introduced from the copy sheet cassette 52 mounted on the intermediate cassette receiving section 50b or the upper cassette receiving section 50c to the copy sheet conveying path 58 is conveyed through the copy sheet conveying path 58.
During this time, the toner image is transferred to one surface (that is, the upper surface) of the copy paper in the transfer area 18, and the toner image is fixed on the one surface of the copy paper by the action of the heat fixing roller pair 88, and thus the one surface of the copy paper. An image is formed on. The copy sheet from the copy sheet conveying path 58 is introduced into the copy sheet reversing path 108 through the copy sheet moving path 96 in the conveyance control means 94, and proceeds in the copy paper reversing path 108 in the direction indicated by an arrow 138.
At this time, one side of the copy paper comes into contact with one side 102a of the discharge roller pair 102 which is being driven to rotate in the direction shown by the arrow 140, but slip is generated between the discharge roller 102a and the copy paper. Therefore, the copy paper is shown in arrow 13 even though roller 102a is rotationally driven in the direction indicated by arrow 140.
You can proceed in the direction indicated by 8. When the trailing edge of the copy paper passes through the downstream end of the copy paper transport path 58, that is, the nip portion of the transport roller pair 92, the reversing roller 114 provided at the upstream end of the copy paper reversing path 108 is shown by a chain double-dashed line. Is positioned in position, which causes the copy paper to
It is pressed against one of the two 102a. As a result, the copy paper is moved in the direction shown by the arrow 142 with its front and back reversed by the action of the discharge roller 102a that is being rotationally driven in the direction shown by the arrow 140. Then, one side 92a of the conveying roller pair 92 which is rotationally driven in the direction indicated by the arrow 140.
And the guide plate pair 116 and one side 116a of the guide plate pair 116, and is introduced into the copy paper return path 110 and proceeds through the copy paper return path 110. The reverse rotation roller 114 in the copy paper reverse rotation path 108 is returned to the non-acting position shown by the solid line at an appropriate time after the copy paper is introduced into the copy paper return path 110.

The copy sheet advanced through the copy sheet return path 110 is guided to the receiving table 122 of the copying sheet retransmitting means 120, and the receiving table 122.
Proceed above to the right in FIG. Then, the feeding roller 126, which is rotated in the direction indicated by the arrow 144, acts on the copy sheet to further feed the copy sheet to the right, and thus the leading edge of the copy sheet is positioned at the operating position indicated by the solid line. It is brought into contact with the stopping means 124 which is being held. Thus, the copy paper is prevented from advancing, and the copy paper is stopped at the required position on the copy paper retransmitting means 120. At this point the feeding roller 12
Even if 6 is rotated in the direction indicated by arrow 144, a slip is created between the feed roller 126 and the copy sheet, and the copy sheet is not advanced further.

When the required number of copy sheets are returned to the copy sheet retransmitting means 120 as described above, the lower movable guide member of the conveyance control means 94.
98 and the upper movable guide member 100 are returned to the lowered position shown by the solid line. Then, the stopping means 1 in the copy paper retransmitting means 120
24 is located in a non-acting position indicated by a chain double-dashed line, and arrow 14
By the action of the feeding roller 126 which is rotationally driven in the direction indicated by 4, the copy sheet is retransmitted from the copy sheet retransmitting means 120 to the copy sheet resupply path 128. The copy paper sent to the copy paper re-supply path 128 is advanced one by one through the copy paper re-supply path 128 and is again supplied to the copy paper transport path 58. As easily understood by referring to FIG. 1, such a copy sheet is turned upside down by passing through a substantially semicircular copy sheet resupply path 128, and one side on which an image has already been formed is made a bottom side. In this state, it is supplied to the copy paper conveyance path 58.
Next, the copy paper is conveyed through the copy paper conveyance path 58. At this time, the toner image is transferred to the other surface of the copy paper, that is, the upper surface in the transfer area 18, and the toner image is fixed on the copy paper by the action of the heat fixing roller pair 88, and thus the image is formed on the other surface of the copy paper. It is formed. The copy paper is then
It is introduced from the copy paper transport path 58 to the copy paper discharge path 104 through the copy paper moving path 96 in the transfer control means 94, and discharged to the tray 106 through the copy paper discharge path 104. Thus, a copy paper having an image formed on both sides is obtained.

Thus, the above-described configuration and operation of the illustrated electrostatic copying machine do not constitute a novel feature improved in accordance with the present invention, but show an example of an electrostatic copying machine to which the present invention can be applied. Rinse, therefore, a detailed description thereof will be omitted herein.

Support Frame Structure Referring to FIG. 2 together with FIG. 1, the housing 2 is composed of a lower support frame 146 and an upper support frame 148. The upper support frame 148 is rotatably attached to the lower support frame 146 via the support shaft 150, and has an operating position (closed position) shown in FIG. 1 and a non-operating position (shown in FIG. 2). It can be swung between the open position). The mounting method itself of the upper support frame 148 to the lower support frame 146 is
For example, the method disclosed in JP-A-59-100459, JP-A-59-152458 or JP-A-59-188670 may be used.

Referring to FIG. 3, the lower support frame body 146 has a substantially box shape with an open upper surface, and the upper support frame body 14 is
Reference numeral 8 is a general shape with the lower surface opened. The lower support frame body 146 has therein a lower front substrate 152 and a lower rear substrate 154 which are disposed substantially vertically in the front-rear direction (direction perpendicular to the paper surface in FIGS. 1 and 2) with a space therebetween. Have.
Similarly, the upper support frame 148 also has an upper front substrate 156 and an upper rear substrate 158 (FIGS. 1 and 2) that are disposed in the interior thereof in the front-rear direction with a space therebetween in a substantially vertical direction. Among the various constituent elements described with reference to FIG. 1, the constituent elements arranged below the dashed-dotted line 160 shown in FIG. 1 are the lower front substrate 152 and the lower rear substrate 154. The component mounted between the upper front substrate 15 and the component disposed above the alternate long and short dash line 160 shown in FIG.
It is arranged between 6 and the upper rear substrate 158. Therefore, as will be understood by referring to FIGS. 1 and 2, in the illustrated embodiment, copy paper supply paths 56a, 56b.
And 56c, most of the copy paper transport path 58 (more specifically, the portion except the portion defined by the heating and fixing roller pair 88), and the copy paper discharge path 104, the upper support frame 148.
Is defined between the lower support frame 146 and the upper support frame 148 when positioned in the working position shown in FIG.
It is released when the upper support frame 148 is forced into the inoperative position shown in FIG. In the illustrated example, the upper roller of the heating and fixing roller pair 88 in the copy paper conveyance path 58.
88a and its supporting means are mounted so as to be rotatable around the support shaft 162 between the operating position (closed position) shown in FIG. 1 and the non-operating position shown in FIG. When the support frame 148 is moved to the non-acting position shown in FIG. 2 and then the upper roller 88a and its supporting means are moved to the non-acting position shown in FIG. 2, the copy sheet conveying path 58 is entirely opened. To be done. On the other hand, copy paper reverse path
108 is more specifically in the upper support frame 148.
A copy paper return path 110, a copy paper re-sending means 120, and a copy paper re-supply path 128 are provided between 6 and the upper rear substrate.
Inside the lower support frame 146, more specifically, the lower front substrate 152.
And the lower rear substrate 154.

Referring to FIG. 4 together with FIGS. 1 and 2,
The lower front substrate 152 of the lower support frame 146 has a relatively large single continuous opening 164 formed therein. The opening 164 is continuously formed over a region where most of the copy paper return path 110, more specifically, a region defined by the return control mechanism 118 exists, and a region where almost all of the copy paper retransmitting unit 120 exists. It has been extended. In addition, the opening 164
1 and 4, the right edge is adjacent to the copy paper refeed path 128. Therefore, the copy paper return path 11
0, when the copy paper is jammed in the copy paper resending means 120 and the copy paper re-supply path 128, the jammed copy paper can be easily removed by inserting a hand through the opening 164. it can. The return control mechanism 118 in the copy sheet return path 110 has a movable frame body 166. The movable frame 116 is rotatable about a turning axis extending along the rear edge thereof between an operating position shown by a solid line in FIG. 4 and a non-operating position shown by a two-dot chain line in FIG. It is mounted on the lower rear substrate 154 (FIG. 3). As is apparent from FIG. 4, the opening 164 is not limited to the area where the movable frame body 166 exists when the movable frame body 166 is located in the operating position, and the movable frame body 166 is located in the non-operating position.
Also extends to the area where there is. The plurality of upper elements (that is, the elements defining the upper side of the copy sheet return path 110) in the return control mechanism 118 are the lower front substrate 1 of the lower support frame 146.
The plurality of lower elements (that is, the elements defining the upper side of the copy paper return path 110) of the return control mechanism 118, which are directly attached to the lower rear substrate 154 and the lower rear board 154, are the movable frame 1 described above.
It is attached to 66. Therefore, when a paper jam of copy paper occurs in the return control mechanism 118, the movable frame 16
The gripping portion 168 formed at the front end of 6 is moved to move the movable frame body 166 from the operating position indicated by the solid line to the non-operating position indicated by the chain double-dashed line, and the copy paper return path 110 in the return control mechanism 118 is moved. The open and thus jammed copy paper can be removed with sufficient ease.

Referring again to FIG. 3, the front wall of the lower support frame 146 is defined by the lower front cover member 170 that can be opened and closed. The lower front cover member 170 has a closed position (a position indicated by a chain double-dashed line in FIG. 3) that covers substantially the entire front surface of the lower support frame 146 around the pivot axis 172 extending along the lower end edge thereof and a lower support. The frame 146 is mounted by an appropriate mounting mechanism (not shown) so as to be rotatable between an open position (a position shown by a solid line in FIG. 3) that exposes almost the entire front surface of the frame 146. Similarly, the portion of the front wall of the upper support frame 148 excluding the upper end is defined by an upper front cover member 174 that can be opened and closed. This top front cover member 1
The upper support frame 74 has a closed position (a position indicated by a chain double-dashed line in FIG. 3) covering a portion of the front surface of the upper support frame 148 except for the upper end portion around the pivot axis 176 extending along the lower edge thereof.
It is mounted by an appropriate mounting mechanism (not shown) so as to be rotatable between an open position (a position shown by a solid line in FIG. 3) that exposes a portion of the front surface of 148 excluding an upper end portion.

Locking Means and Detecting Means Referring to FIG. 5 together with FIG. 3, a support plate 178 extending forward from the upper front substrate 156 of the upper support frame 148 is fixed. And this support plate 178
The first detection element 180 is fixed to one surface of the and the second detection element 182 is fixed to the other surface. First detection element 180
May be a limit switch having a detection arm 184, and likewise the second detection element 182 may be a limit switch having a detection arm 186. In the upper front substrate 156 of the upper support frame 148, the lower portion of the support plate 178 is located below the upper front substrate.
A restraint member 188 formed of a plate-like member extending forward from 156 is also fixed. An opening 190 located below the tip of the detection arm 184 of the first detection element 180 is formed at the tip of the restraining member 188.

On the other hand, a piece 192 is fixed to the back surface of the lower front cover member 170 of the lower support frame body 146, which can be opened and closed. As clearly shown in FIG. 3, the free end of this piece 192 is
It passes through a notch 193 formed in the upper wall portion of the lower front cover member 170 and projects beyond the upper end of the lower front cover member 170. As will be apparent from the description below, the piece 192 functions as a constrained member that constitutes the locking means in cooperation with the restraining member 188, and cooperates with the first detecting element 180 in the first detecting element 180. It functions as a detected element that constitutes the first detection means. A piece 194 is fixed to the back surface of the upper front cover member 174 of the upper support frame 148 that can be opened and closed. Such piece 194 cooperates with the second detection element 182 to provide a second piece, as will be apparent from the description below.
Functioning as a detection target element that constitutes the detection unit.

As can be seen by referring to FIGS. 3 and 5, the lower front cover member 170 of the lower support frame 146 is brought to the closed position shown by the chain double-dashed line in FIG. 3, and then the upper support frame 148. Is pushed to the working position (Fig. 1),
The tip of the piece 192 is received in the opening 190 of the restraining member 188. Thus, the forward movement of the piece 192 is restrained by the restraining member 188, and thus the lower front cover member 1
70 is locked in the closed position indicated by the two-dot chain line in FIG. That is, in the illustrated electrostatic copying machine, when the upper support frame 148 is in the operating position (FIG. 1), the restraining member 188 and the piece 1 are arranged.
In cooperation with 92, the lower front cover member 170 is locked in the closed position, and the lower front cover member 170 cannot be moved to the open position shown by the solid line in FIG. Upper support frame 14
When 8 is moved to the non-acting position shown in FIG. 3, the restraining member 188 separates from the piece 192 and thus the lower front cover member.
170 can be moved to the open position shown by the solid line in FIG.

When the lower front cover member 170 of the lower support frame 146 is moved to the closed position shown by the chain double-dashed line in FIG. 3, and then the upper support frame 148 is moved to the operating position (FIG. 1), the parts are moved as described above. In addition to the fact that the tip of the piece 192 is received in the opening 190 of the restraining member 188 and the lower front cover member 170 is locked in the closed position, the piece 192 can be seen as seen in FIG.
Presses the detection arm 184 of the first detection element 180, whereby the first detection element 180 is switched on. In addition, the upper front cover member 1 in the upper support frame 148
When 74 is forced to the closed position shown by the chain double-dashed line in FIG. 3,
The tip of the piece 194 is the detection arm 18 of the second detection element 182.
Pressing 6 causes the second detection element 182 to be switched on. First detection element 180 and second detection element 182
Acts as a so-called safety switch, and the first detection element 18
When both 0 and the second detection element 182 are ON, the operation of the electrostatic copying machine is permitted.

If desired, the constrained member and the detected element can each be composed of separate pieces. Also, the upper support frame 148
The piece 192 is fixed to the upper front substrate 156 of the lower support frame body 146.
The first detection element 180 and the restraining member on the lower front cover member 170 of the
188 can be fixed. Further, the piece 194 can be fixed to the upper front substrate 156 of the upper support frame 148, and the second detection element 182 can be fixed to the upper front cover member 174 of the upper support frame 148.

Paper Jam Processing Procedures Referring to FIGS. 1, 2 and 3, when the electrostatic copying machine is operating in a mode in which an image is formed on only one side of the copy paper, the copy paper supply paths 56a, 56b and 56c, when the copy paper is jammed in the copy paper transport path 58 or the copy paper discharge path 104 and the operation of the electrostatic copying machine is stopped, the upper support frame 148 is attached to the upper support frame 148 shown in FIGS. Place it in the inoperative position shown. Thus, the copy paper supply paths 56a, 56b and 56
c, most of the copy paper transport path 58 (more specifically,
The portion other than the portion defined by the heating and fixing roller pair 88) and the entire copy paper discharge path 104 are opened. Then, if necessary, the upper roller of the heat fixing roller pair 88 is
88a and its supporting means are set to the non-acting position shown in FIG. 2, and thus the entire copy sheet conveying path 58 is opened. Next, copy paper supply paths 56a, 56b and 56c, copy paper transport path 5
8 Alternatively, the copy paper existing in the copy paper discharge path 104 is removed.

Next, a description will be given of processing in the case where the copy paper is jammed and the operation of the electrostatic copy machine is stopped while the electrostatic copy machine is operating in the mode of forming images on both sides of the copy paper. In this case, the following facts should be noted. That is, in the case of so-called multiple copy in which a plurality of copies are obtained from the same original, for example, when the copy paper is jammed in the copy paper return path 110 or the copy paper resending means 120, the jammed copy paper is the last copy. Copy paper supply path unless copy paper for
There is a succeeding copy sheet in 56a, 56b and 56c, the copy sheet conveying path 58, or the copy sheet reversing path 108, and it is necessary to remove the copy sheet. Thus, in the illustrated electrostatic copying machine, the copy to be removed which exists in the copy paper returning path 110, the copy paper retransmitting means 120 or the copy paper re-supplying path 128 arranged in the lower support frame 146. Even if the lower front cover member 170 is moved to the open position shown by the solid line in FIG. 3 to remove the paper, as long as the upper support frame 148 is in the operating position shown in FIG. That is, the action of the restraining member 188 and the piece 192) prevents the lower front cover member 170 from opening. Therefore, prior to opening the lower front cover member 170, the upper support frame 148 is moved to the second position.
It is necessary to place it in the non-acting position shown in FIGS. Then, if necessary, a pair of heat fixing rollers 88
The upper roller 88a and its supporting means are brought into the non-acting position shown in FIG. The copy paper supply paths 56a, 56b and
56c, the copy paper existing in the copy paper transport path 58 or the copy paper reverse rotation path 108 is removed. The copy paper existing in the copy paper reverse rotation path 108 can be sufficiently easily removed by inserting a hand from the open lower surface of the upper support frame 148. Thereafter, the lower front cover member 170 is moved to the open position shown by the solid line in FIG. Next, if necessary, the movable frame 166 of the return control mechanism 118 is set to the non-acting position shown by the chain double-dashed line in FIG. When the lower front cover member 170 is moved to the open position, the opening 164 formed in the lower front substrate 152 is exposed. Therefore, by inserting a hand through the opening 164, the copy paper return path 110 and the copy paper retransmitted. The copy paper to be removed that is present in the means 120 or the copy paper resupply path 128 can be removed very easily. Therefore, in the illustrated electrostatic copying machine, for example, the copy paper is removed from only the copy paper return path 110 or the copy paper retransmitting means 120, and the copy paper supply paths 56a, 56b and 56c,
It is sufficiently prevented that the copy paper to be removed is inadvertently left in the copy paper transport path 58 or the copy paper reverse path 108 to restart the operation of the electrostatic copying machine, thus causing various inconveniences. .

Transport Control Means Next, the configuration of the transport control means 94 will be described in detail with reference to FIGS. 6 to 8. As described above, the illustrated conveyance control means 94 includes the lower movable guide member 98 and the upper movable guide member 100.
Includes and. As shown most clearly in FIG. 8, the lower movable guide member 98 has a support shaft 196, and the support shaft 196 is provided with a plurality of substantially triangular lower guides at appropriate intervals in the axial direction. The piece 198 is integrally formed. Both ends of the support shaft 196 are respectively provided on the lower front substrate 1 of the lower support frame 146.
52 and the lower rear substrate 154 are pivotally mounted, and thus the lower movable guide member 98 is pivotally mounted at a predetermined position on the lower support frame 146 (see also FIG. 3).
A connecting piece 200 (FIGS. 6 and 7) is also integrally formed with the 196. An operating means, which may be an electromagnetic solenoid 202, is connected to the connecting piece 200. More specifically, the main body of the electromagnetic solenoid 202 is a lower support frame body 146 (7th
The core 204 is fixed to a predetermined position in the drawing, and the iron core 204 is pivotally connected to the connecting piece 200 by a connecting pin 206. When the electromagnetic solenoid 202 is de-energized,
The lower movable guide member 98 is positioned at the position shown by the solid line in FIG. 6, that is, the lowered position. When the electromagnetic solenoid 202 is biased, the lower movable guide member 98 is swung to the position shown by the chain double-dashed line in FIG. 6, that is, the raised position. The lower movable guide member 98 further includes a plurality of lower guide pieces 198 described above.
Projections 208 projecting outward from the outer surfaces of the lower guide pieces 198 located on both sides of the two are also integrally formed. The protrusion 208 constitutes a contact means that acts on the upper movable guide member 100, as will be apparent from the description below.

On the other hand, the upper movable guide member 100 has an elongated plate member 212 integrally formed with a plurality of substantially triangular upper guide pieces 210 at appropriate intervals in the longitudinal direction. Each of the upper guide pieces 210 is positioned corresponding to each of the plurality of lower guide pieces 198 of the lower movable guide member 98.
Substantially rectangular pieces 214 are integrally formed on both ends of the plate member 212, and a short shaft 216 extending outward is integrally formed on the outer surface of each of the pieces 214. Above piece 2
Reference numeral 14 constitutes a contacted means that cooperates with the protrusion of the lower movable guide member 98, that is, the contact means 208. Each of the short axes 216 has an upper front substrate 156 (third part) in the upper support frame 148.
(Fig.) And the upper rear substrate 158 (Fig. 7), and the upper movable guide member 100 is rotatably mounted at a predetermined position on the upper support frame 148. Upper movable guide member 10
A pin 218 is integrally formed on the outer surface of the rear end portion of each of the upper guide portion pieces 210 located on both sides of the plurality of upper guide portion pieces 210 in 0. Corresponding to this, the pins 220 are also fixed to the inner surfaces of the upper front substrate 156 (FIG. 3) and the upper rear substrate 158 of the upper support frame 148.
An elastic means, which may be a tension spring 222, is arranged between each of the pins 218 and each of the pins 220. The tension spring 222 elastically biases the upper movable guide member 100 counterclockwise in FIG. If desired, the weight of the upper movable guide member 100 itself may cause the upper movable guide member 100 to be biased counterclockwise in FIG. Further, in the illustrated specific example, a control means 224 composed of a plate-shaped member is fixed at a predetermined position in the upper support frame 148.

In the transport control means 94 as described above, the upper support frame
When the electromagnetic solenoid 202 is deenergized when the 148 is in the operating position shown in FIG. 1, the lower movable guide member 98 is positioned in the descending position shown by the solid line in FIG. 6 as described above. Has been. The upper movable guide member 100, which is elastically biased in the counterclockwise direction in FIG. 6 by the tension spring 222, has its part, that is, the contacted means 214.
Is brought into contact with the projection of the lower movable guide member 98, that is, the contact means 208, and thus is positioned at the position shown by the solid line in FIG. 6, ie, the lowered position. Referring to FIG. 1 together with FIG. 6, a lower movable guide member 98 and an upper movable guide member 100 will be described.
When and are positioned in the down position shown by the solid line,
The copy paper movement path 96 defined between the upper edge of the lower guide piece 198 of the lower movable guide member 98 and the lower edge of the upper guide piece 210 of the upper movable guide member 100 is a copy paper transport path.
58 and the copy paper discharge path 104 are made to communicate with each other.

On the other hand, when the electromagnetic solenoid 202 is energized, the lower movable guide member 98 is swung clockwise in FIG. 6 and positioned at the raised position shown by the chain double-dashed line in FIG. 6 as described above. In this way, the upper movable guide member 100 is also elastically biased by the tension spring 222 by the projection or contact means 208 of the lower movable guide member 98 and the piece or contacted means 214 of the upper movable guide member 100 cooperating therewith. 6th against action
In the figure, it is turned clockwise and positioned at the position shown by the chain double-dashed line in FIG. 6, that is, in the raised position. Referring to FIG. 1 together with FIG. 6, a lower movable guide member will be described.
When the 98 and the upper movable guide member 100 are positioned at the elevated position shown by the chain double-dashed line, the upper edge of the lower guide piece 198 of the lower movable guide member 98 and the upper guide piece 210 of the upper movable guide member 100. Copy paper movement path 9 defined between the bottom edge
Reference numeral 6 makes the copy paper conveyance path 58 and the copy paper reverse rotation path 108 communicate with each other, and also makes the copy paper reverse rotation path 108 and the copy paper return path 110 communicate with each other.

The lower movable guide member 98 is mounted on the lower support frame body 146 (FIG. 7), while the upper movable guide member 100 is mounted on the upper support frame body 148 (FIG. 7). Therefore,
As shown in FIG. 7, when the upper support frame 148 is moved from the operating position shown in FIG. 1 toward the non-operating position shown in FIGS. 2 and 3, the upper movable guide member 100 moves downward. The copy paper moving path 96 (FIG. 6) which is separated upward from the side movable guide member 98 and is defined therebetween is opened. When the upper movable guide member 98 is separated upward from the lower movable guide member 100, the piece of the upper movable guide member 100, that is, the contacted means 214 is separated from the protrusion of the lower movable guide member 98, that is, the contact means 208. To do. Therefore, due to the elastic biasing action of the tension spring 222, the upper movable guide member 100
Is turned counterclockwise in FIG. However, when the upper movable guide member 100 is pivoted slightly counterclockwise, one or more rear end upper edges of the upper guide piece 210 of the upper movable guide member 100 are fixed to the upper support frame 148. The upper movable guide member 100 is prevented from further turning counterclockwise in FIG.

If desired, with the upper support frame 148 in the non-actuated position and the electromagnetic solenoid 202 de-energized, the upper end of the upper guide piece 210 of the upper movable guide member 100 may have the upper edge of the rear end of the upper guide portion 210 above. The upper movable guide member 100 is brought into contact with the restricting means 224, so that the upper movable guide member 100 is positioned at the lowered position shown by the solid line in FIG. There may be a slight gap between the part or the abutted means 214. In addition, the upper movable guide member 10
When 0 is biased to the raised position and the lower movable guide member 98 is moved to the lowered position, the upper movable guide member 100 can be moved to the lowered position by the action of the contact means and the contacted means. . Further, contrary to the illustrated specific example, an operating means such as an electromagnetic solenoid is attached to the upper movable guide member 100 to move the upper movable guide member 100 from the raised position (or lowered position) to the lowered position (or raised position). The lower movable guide member 98, which is biased to the raised position (or the lowered position) when it is biased, may be biased to the lowered position (or the raised position) by the action of the contact means and the contacted means. it can.

Although one specific example of the electrostatic copying machine configured according to the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to the specific example and deviates from the scope of the present invention. It is not necessary to say a lot that it is possible to make various changes and modifications without needing to do so.

<Effects of the Invention> The present invention is configured as described above, and the lower front cover member is configured to be openable and closable between the closed position that covers at least a large part of the front surface of the lower support frame and the open position that is exposed. Is installed, the lower front cover member must be in the open position to remove the jammed copy paper in the copy paper return path. When the front cover member is prevented from being opened from the closed position to the open position and the upper support frame is swung from the operating position to the non-operating position, the lower front cover member is opened from the closed position to the open position. The lower front cover member locking means is provided so that the lower front cover member cannot be moved from the closed position to the open position unless the upper support frame is operated from the operating position to the non-operating position.
Therefore, in order to operate the lower front cover member to the open position and remove the jammed copy paper in the copy paper return path,
Since the upper support frame has already been swung from the operating position to the non-operating position and the copy paper transport path is open, if there is a jammed copy paper in the copy paper transport path, it can be immediately confirmed. Therefore, the jammed copy paper is removed only from the copy paper return path, and the operation of the electrostatic copying machine is restarted with the copy paper to be removed inadvertently left in the copy paper transport path. Can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing main components of an electrostatic copying machine constructed according to the present invention. FIG. 2 is a sectional view similar to FIG. 1, showing a state in which the upper support frame body in the electrostatic copying machine of FIG. 1 is set in a non-operating position. FIG. 3 is a simplified perspective view showing the support frame structure in the electrostatic copying machine of FIG. 1 in a state where the upper support frame is in a non-operating position. FIG. 4 is a partial front view showing a part of the lower front substrate of the lower support frame in the electrostatic copying machine of FIG. FIG. 5 is a partial perspective view showing the locking means and the detection means in the electrostatic copying machine of FIG. FIG. 6 is a partial sectional view showing a conveyance control means in the electrostatic copying machine of FIG. FIG. 7 is a partial sectional view similar to FIG. 6, showing the conveyance control means in the electrostatic copying machine of FIG. 1 with the upper support frame moved somewhat from the working position to the non-working position. Fig. FIG. 8 is a partial perspective view showing the conveyance control means in the electrostatic copying machine of FIG. 2 ... Housing 8 ... Rotating drum 48 ... Copy paper supply means 56a, 56b and 56c ... Copy paper supply path 58 ... Copy paper conveying path 94 ... Transfer control means 96 ... Copy paper moving path 98 ... Lower movable guide member 100 …… Upper movable guide member 104 …… Copy paper discharge path 108 …… Copy paper reverse path 110 …… Copy paper return path 118 …… Return control mechanism 120 …… Copy paper resending means 128 …… Copy Paper re-supply path 146 …… Lower support frame 148 …… Upper support frame 152 …… Lower front substrate 154 …… Lower rear substrate 156 …… Lower front substrate 158 …… Upper front substrate 164 …… Lower front substrate opening 170 ... lower front cover member 174 ... upper front cover member 180 ... first detection element (detection means) 182 ... second display element (detection means) 188 ... restraint member (locking means) 192 ... Part (constrained means and detected element) 194 …… Part (detected element) 202 …… Electromagnetic solenoid ( Motion means) 208 ...... projection (abutment means) 214 ...... piece (to be abutment means) 222 ...... tension spring (resilient means) 224 ...... limiting means

 ─────────────────────────────────────────────────── --- Continued from the front page (56) Reference JP-A-59-182162 (JP, A) JP-A-59-211059 (JP, A) JP-A-58-68763 (JP, A) JP-A-58- 23065 (JP, A) JP 58-21270 (JP, A)

Claims (12)

[Claims] 1. A lower support frame, an upper support frame mounted on the lower support frame so as to be rotatable between an operating position and a non-operating position, a copy paper transport path, and the copy paper transport path. A copy paper supply means for supplying a sheet copy paper to the sheet and a copy paper return path, and the copy paper supplied from the copy paper supply means to the copy paper transport path passes through the copy paper transport path. An image is formed on one side of the copy paper while being conveyed, and the copy paper having the image formed on one side is selectively introduced into the copy paper return path and returned through the copy paper return path, An image is then formed on the other side of the copy paper while being re-supplied to the copy paper transport path and being re-transported through the copy paper transport path, at least a majority of the copy paper transport path is the upper support frame. The lower support when the body is positioned in the working position. It is defined between the frame body and the upper support frame body, and is opened when the upper support frame body is brought into the non-operating position, and at least most of the copy paper return path is provided in the lower support frame body. In the electrostatic copying machine of the type described above; the lower support frame is openable and closable between a closed position that covers at least most of its front surface and an open position that exposes it.
The lower front cover member is attached, and in order to remove the jammed copy paper in the copy paper return path, it is necessary to move the lower front cover member to the open position. Is in the working position, the lower front cover member is prevented from being opened from the closed position to the open position, and when the upper support frame is swung from the working position to the non-working position, An electrostatic copier comprising lower front cover member locking means for allowing the lower front cover member to be opened from the closed position to the open position. 2. The lower front cover member locking means includes a restraint member provided on one of the upper support frame and the lower front cover member, the upper support frame and the lower front cover member. When the lower front cover member is in the closed position and the upper support frame is in the operating position, the restraining member acts to restrain the restrained member. Restraining, thereby preventing the lower front cover member from being opened from the closed position to the open position, and pivoting the upper support frame from the working position to the non-working position; The electrostatic copying machine according to claim 1, wherein the constrained member is separated from each other. 3. The lower front cover member is rotatable and openable and closable between the closed position and the open position about a pivot axis extending along a lower end edge of the lower front cover member. The electrostatic copying machine according to item 2. 4. An upper front cover member is attached to the upper support frame so as to be openable and closable between a closed position that covers at least most of the front surface of the upper support frame and an open position that exposes it. The electrostatic multi-function peripheral according to any one of the first to third aspects. 5. The upper front cover member according to claim 4, wherein the upper front cover member is pivotally movable between the open position and the closed position about a pivot axis extending along a lower end edge of the upper front cover member. Electrostatic copying machine. 6. The static unit according to claim 1, further comprising detection means for detecting that the lower front cover member is in the closed position and the upper support frame is in the working position. Electrocopier. 7. The detection means includes a detection element provided on either one of the upper support frame and the lower front cover member.
The upper support frame body and the lower front cover member are provided with the detected element, and the upper support frame body is in the working position and the lower front cover member is in the closed position. The electrostatic multi-function peripheral according to claim 6, wherein the detection element detects the detection target element. 8. The lower front cover member locking means includes a restraint member provided on one of the upper support frame and the lower front cover member, the upper support frame and the lower front cover member. When the lower front cover member is in the closed position and the upper support frame is in the operating position, the restraining member acts to restrain the restrained member. Restraining, thereby preventing the lower front cover member from being opened from the closed position to the open position, and pivoting the upper support frame from the working position to the actuated position, the restraining member And the constrained member are separated from each other, and the constrained member of the lower front cover member locking means,
The detected element of the detecting means is composed of a common piece,
An electrostatic copying machine according to claim 7. 9. A copy paper re-supply path and a copy paper returned through the copy paper return path for receiving and receiving the copy paper again through the copy paper re-supply path to the copy paper transport path. Copy paper retransmitting means, and at least a majority of the copy paper resupplying path is provided inside the lower support frame, and the clogged copy is provided in the copy paper resupplying path. In order to remove the copy paper jammed in the paper and the copy paper retransmitting means,
9. The electrostatic copying machine according to claim 1, wherein the lower front cover member is required to be in the open position. 10. The lower support frame body includes a lower front substrate and a lower rear substrate that are arranged at intervals in the front-rear direction, and at least most of the copy paper return path, the copy paper resupply path. And at least most of the copy paper retransmitting means are provided between the lower front substrate and the lower rear substrate, and at least most of the copy paper return path is provided in the lower front substrate. 10. The electrostatic copying machine according to claim 9, wherein a single opening is formed extending over an area where the copy paper retransmitting means is present. 11. At least a majority of the copy paper return path is defined between a plurality of upper elements and a plurality of lower elements, the plurality of upper elements including the lower front substrate. Mounted between the lower rear substrate and the plurality of upper elements mounted between the lower front substrate and the lower rear substrate; A movable frame is mounted movably between the working position and the plurality of lower elements are mounted on the movable frame, and the copying is performed when the movable frame is in the working position. At least most of the paper return path is defined, and when the movable frame is brought to the inoperative position, at least most of the copy paper return path is opened, and the opening formed in the lower front substrate is The movable frame extends not only to the working position but also to the non-working position,
An electrostatic copying machine according to claim 10. 12. The movable frame body is mounted on the lower rear substrate such that the movable frame body can swing between a working position and a non-working position about a swing axis extending along a rear edge of the movable frame body. An electrostatic copying machine according to claim 11.