JPH0419549Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an electronic copying machine that can easily release a jam. (b) Prior Art In electronic copying machines, after the latent image on the photoreceptor drum is developed and transferred onto copy paper, the copy paper is transferred to the fixing device using a conveyance device. The device is fixed in the main body of the copying machine as shown in Japanese Patent Application Laid-Open No. 57-38482. Therefore, if a jam occurs in the conveying device or other places nearby, there is a drawback that it is not possible to easily remove the jammed copy paper. Therefore, if the entire conveyance device is configured to be retracted from the copying machine main body, the removal operation described above becomes easier, but since the drive system must be separated at the same time, another problem arises in that the mechanism becomes complicated. (c) Purpose of the invention The present invention has been made in view of the above points, and aims to provide an electronic copying machine constructed with a simple mechanism that facilitates jam removal work in the conveyance system. (d) Structure of the invention The present invention comprises a photoreceptor drum, a conveying means for carrying a copy paper separated from the photoreceptor drum and conveying the copy paper, and a receiving means for receiving the copy paper conveyed by the conveyance means. In the electronic copying machine, the conveying means includes a conveying section located inside the copying machine main body to partially place the copy paper and conveying the copy paper, and a conveying section for transporting the copy paper from the conveying section. The electronic copying machine is characterized in that the electronic copying machine includes a support part that supports the protruding portion of the copy paper, and the support part is disposed so as to be movable from the main body of the apparatus toward the outside of the main body. (E) Embodiment Figure 1 is a schematic cross-sectional view of the entire electronic copying machine that is the basis of the present invention, Figure 2 is a side sectional view of the main parts of the present invention, and Figure 3 is a top view of the main parts of the present invention. 4 are perspective views of the main parts of the present invention. When the paper feed cassette 2 is inserted into the copying machine main body 1 from the right side to the left side and set at the position shown in the figure, the copy sheets P stacked in the paper feed cassette are fed by the push-up roller arm 3. It is pressed against the roller 4. Then, when a copy operation is commanded,
The topmost copy paper P in the paper feed cassette 2 is sent out to the left by the clockwise rotation of the paper feed roller 4, and further passes between a pair of transport rollers 6 and 7 along the paper guide 5. It slips through and is sent out to a position where the downstream end edge is locked by the lever 8, and waits at that position for a while. On the other hand, a document table 9 made of a transparent glass plate is mounted on the upper surface of the copying machine main body 1 so as to be slidable in the left and right directions. A cover 10 is attached to the upper surface of the document table 9 so as to be openable and closable, and during a copying operation, the document is held between the document table 9 and the cover 10 and moves in the left and right direction. A photoreceptor drum 11 whose peripheral surface is coated with a polyvinyl carbazole photoreceptor is rotatably mounted on the copying machine main body 1 .
A short focus lens array 12 is vertically disposed on the top of the photoreceptor drum 11 for forming an image of a document placed on the document table 9 on the circumferential surface of the photoreceptor drum 11 . An exposure lamp (halogen lamp) 13 for illuminating the document surface is provided on the right side of this short focus lens row 12.
2 and the exposure lamp 13 are fixed to the same chassis (not shown). 14 is a reflection plate of the exposure lamp 13. On the upstream side of the short focus lens array 12, the photoreceptor drum 11 is uniformly positively charged (approximately
A charging corotron 15 for charging the battery (600V) is fixedly installed. A developing device 17 for developing an electrostatic latent image formed by the charging corotron 15 and the short focus lens array 12 with toner 16 is provided downstream of the short focus lens array 12 . The developing device 17 includes a magnet roller 18 for conveying a developer consisting of a mixture of toner and carrier toward the surface of the photoreceptor drum 11, and a screw 19 for mixing the toner and carrier. Built-in. Reference numeral 20 denotes a toner hopper detachably attached to the upper part of the developing device 17. At the bottom of the toner hopper 20, the toner 1 stored inside is stored.
A sponge roller 21 is provided for supplying 6 to the developing device 17 little by little. A transfer corotron 22 for transferring the toner image developed by the developing device 17 onto copy paper P is provided below the photosensitive drum 11. Further, on the downstream side of the transfer corotron 22, a separation claw 23 for separating the copy paper P from the photoreceptor drum 11 is provided.
are located adjacent to each other. The copy paper P separated by the separating claws 23 is transferred to the fixing means 60 by the conveyance means 40, and then conveyed to the paper discharge tray 24. Further, on the downstream side (upper side in the figure) of the separating claw 23 along the rotational direction of the photoreceptor drum 11, there is provided a toner for removing toner that has not been completely transferred to the copy paper P and remains on the photoreceptor drum 11. A cleaning device including a rubber blade 25 for scraping off residual toner on the photosensitive drum 11 and a screw conveyor 26 for discharging the toner scraped off by the blade is provided. In this copying machine, when a copy start switch (not shown) is turned on after an original is placed on the original platen 9, the original platen 9 moves forward in the left direction and then double moves in the right direction. However, during this backward movement, the original image is projected onto the photosensitive drum 11,
An electrostatic latent image corresponding to the original image is formed on the photoreceptor drum 11 . This electrostatic latent image is developed with toner in the developing device 17 , and this toner image is transferred by the transfer corotron 22 onto the copy paper P that has been fed from the conveyance rollers 6 and 7 after the standby state has been released. It is then transcribed. The copy paper P onto which the toner image has been transferred in this way is peeled off from the photosensitive drum 11 by the separating claw, and is fixed by being heated and pressurized by the fixing means 60 . Then, the fixed copy paper P is placed on the paper discharge tray 24. Next, FIG. 2 is a side sectional view of the main part of the present invention,
The details of the conveying means 40 and the fixing means 60 will be explained with reference to FIG. 3, which is a top view of the main parts of the present invention, and FIG. 4, which is a perspective view of the main parts of the present invention. The conveying means can be broadly divided into a conveying section 41 that partially places and conveys the Pa part of the copy paper P, and a conveying section 4 for the copy paper P.
Support part 42 that supports the Pb part protruding from 1
It is equipped with The conveying section 41 includes a driving roller 43 and a driven roller 4.
4, a belt 45 that extends endlessly around both rollers, and a rolling roller 46 that is located on the upper surface side of this belt and holds the copy paper P between it and the belt 45.
As best shown in FIG. 3, it is installed in the copying machine main body 1 so as to hold and transport the Pa portion of the copy paper P. The support portion 42 includes a horizontal portion 42a that supports the Pb portion of the copy paper P, and a vertical portion 42b that is bent downward. The fixing means 60 includes a heat roller 61 fixedly placed on the copying machine main body 1, a pressure roller 62 arranged to press against the heat roller, and a chassis 63 that supports the pressure roller 62. . This pressure roller 62 is
In order to release the pressure contact with the heat roller 61 and easily remove the jammed copy paper when a jam occurs, it is provided so as to be retractable from the copying machine main body 1 along with the chassis 63 (FIG. 4). This fixing means 60 fixes the toner on the copy paper P while being transferred between the rollers 61 and 62 using a heater (not shown) built into the heat roller 61. In Figure 2, broken line 70
indicates the trajectory of the copy paper P. Chassis 63
The vertical portion 42b of the support portion 42 constituting the conveyance means 40 is fixedly mounted so that it is moved simultaneously with the support portion 42 of the conveyance means 40 when the jam is released. Thus, when the driving roller 43 is rotated clockwise in FIG. 2, the belt 45 and the driven roller 44 are frictionally driven in the same direction, and at the same time, the rolling roller 46 is also frictionally driven in the counterclockwise direction. Therefore, the separation claw 2 is separated from the photoreceptor drum 11.
The copy paper P separated at step 3 is sent to the conveyance means 40 , supported by the conveyance section 41 and the support section 42, and fed to the fixing means 60 side by the operation of the conveyance section 41. At this time, since the rolling roller 46 is configured to be driven by the belt 45, the belt 4
The belt 45 is arranged in such a manner that an appropriate tension is applied to the belt 45, and the elongation of the belt 45 can be absorbed, and the copy paper P sent out from the photoreceptor drum 11 is reliably held between the belt 45 and the belt 45. can do. Further, this rolling roller 46 is disposed near the point where the copy paper P is separated from the photoreceptor drum 11, and the copy paper P that is about to move in the tangential direction from the separation point is moved below the rolling roller 46, that is, It is designed so that it can be pulled into the belt 45 side. Furthermore, since the rolling rollers 46 cooperate with the belt 45 to sandwich the sides of the copy paper P, the copy paper P can be transferred without having to place the entire surface of the copy paper on the belt 45, thereby reducing the width of the belt 45. be able to. If a jam occurs on the conveyance path, as shown in FIG . The conveying means 40 is simultaneously pulled out in the horizontal direction regardless of the conveying section 41 equipped with a power transmission mechanism.
Alternatively, copy paper P jammed in the fixing means 60 can be easily removed. In the present embodiment, the support section 42 includes the fixing means 6
Since the supporting part 42 and the fixing part are fixed to the chassis 63 of 0, the supporting part 42 and the fixing part can be moved out of the copying machine body at once without having to move the supporting part 42 and the fixing part separately to the outside of the copying machine main body. This allows the operator to release the jam extremely easily and quickly. In addition, separate pull-out mechanisms for the support section 42 and the fixing section were required, but by fixing the support section 42 and the fixing section, they can be moved out of the copying machine body using a single pull-out mechanism. The structure and mechanism are simplified, leading to cost reduction. (f) Effects of the invention The present invention replaces the conveying means that transports the copy paper from the photosensitive drum to the fixing means with a conveying section that is fixed in the copying machine body and that conveys the copy paper, and this conveying section is mechanically separated. Since the supporting part is separated from the conveying part and supports the copy paper in cooperation with the conveying part, the supporting part, which is part of the conveying means, can be used in the copying machine without moving the conveying part. It can be moved from a fixed position inside the main body to outside the copier main body.
It is possible to release the jam in the conveying means path very easily. In addition, since there is no need to move the transport section outside the copying machine body, there is no need for a complicated mechanism for attaching and detaching the power transmission mechanism, and the transport section can be designed with an extremely simple configuration and mechanism. be.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of the entire electronic copying machine that is the basis of the present invention, Fig. 2 is a side sectional view of the main parts of the invention, Fig. 3 is a top view of the main parts of the invention, and Fig. 4. 1 is a perspective view of the main parts of the present invention. Explanation of main symbols, 11...Photosensitive drum, P...
...copy paper, 40 ... conveyance means, 41 ... conveyance means, 42 ... support means, 61 ... heat roller,
62... Pressure roller, 63... Chassis, 43...
...driving roller, 44...following roller, 45...belt, 46...rolling roller.

Claims (1)

[Claims for Utility Model Registration] A photoreceptor drum, a conveyance means for carrying a copy paper separated from the photoreceptor drum and conveying the copy paper, and a means for receiving the copy paper conveyed by the conveyance means. In an electronic copying machine comprising a fixing means for performing fixing, the conveying means includes a conveying section located inside the copying machine body to partially place the copy paper and conveying the copy paper, and a conveying section protruding from the conveying section. an electronic copying machine, comprising: a support section that supports a portion of the copy paper; the support section is disposed so as to be movable from the main body of the apparatus toward the outside of the main body of the apparatus.