JP3466381B2 - Paper transport device for image forming apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sheet conveying device of an image forming apparatus, and more particularly, to a sheet conveying device provided with a mechanism for removing a sheet jammed in a sheet conveying path. It concerns the device. 2. Description of the Related Art In an image forming apparatus, a guide member for guiding a sheet in a sheet transport path is opened and closed, and when a sheet is jammed in the transport path, the guide member is opened. The remaining paper is removed. However, if a long sheet of paper remains between the upstream and downstream transport roller pairs, or if the paper is stuck in the transport path due to static electricity, etc. There is a problem that it is difficult to take the camera out of the machine. [0003] On the other hand, there is a conventional art in which a guide member is made detachable with respect to a feed roller so that a paper jam can be easily removed (Japanese Utility Model Laid-Open No. 3-9144).
No. 3). However, even in this case, it is not easy to take out the paper adhered to the conveyance path, and there is a problem that the operability of the jam processing is still poor. Conventionally, one end of a spring for urging the opening / closing type guide member to a position for forming a conveyance path is made movable to weaken the urging force of the entire guide member to facilitate jam clearance. (See Japanese Patent Application Laid-Open No. 4-179649). However, even in such a configuration, there is a problem that it is not easy to take out the paper adhered or pinched in the transport path, and it is still difficult to take out the paper. Further, there has been a conventional apparatus that removes a sheet jammed in a transport path to a removal position and releases a guide member at the same time to facilitate removal of the sheet (Japanese Patent Laid-Open No. 5-10).
No. 0523). However, in this case, an operation of feeding the sheet to the removal position is required, and there is a problem that workability is also poor. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned conventional problems by extruding a sheet jammed in a sheet conveying path to the outside of the apparatus together with opening a guide member. It is an object of the present invention to provide a sheet transport device that can easily hold a sheet and perform the remaining sheet processing quickly and easily. Further, when the remaining sheet processing is performed by opening the openable / closing type guide member, the conveying rollers installed on the sheet conveying path may be damaged or stained during the processing operation, thereby deteriorating the conveying performance. There is. Therefore, another object of the present invention is to protect the transport roller at the time of remaining sheet processing by covering the transport roller on the paper transport path from outside when the guide member is opened. According to the present invention, there is provided a sheet conveying apparatus for an image forming apparatus, in which a guide member forming a part of a sheet conveying path is opened outside a housing of the image forming apparatus. in the sheet conveying apparatus of an image forming apparatus capable Remove the paper sheet conveying path by exposing the sheet conveyance path, the proposed
The inner member is a machine that opens outside the housing to expose the paper transport path.
It is composed of an outer guide member and an inner guide member.
A sheet pushing member for pushing out the sheet on the sheet carrying path from the inside of the sheet carrying path to the outside, and an interlocking mechanism for operating the sheet pushing member when the guide member on the outside of the machine is opened, The member is swingably provided with a position on the inner side of the machine behind the conveyance roller provided in the paper conveyance path as a fulcrum, and a front end portion is swingably attached to a front end of the paper pushing member. The tip portion forms a part of the guide member on the inside of the machine, and when the paper pushing member is operated by the interlocking mechanism,
The front end is positioned outside the machine in front of the transport roller while maintaining the posture state. An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a sheet conveying device according to an embodiment of the present invention. As shown in FIG. 1, the paper 2 stored in the paper feed tray 1 is sent out from the paper feed tray 1 when the paper feed roller 3 arranged above the paper feed tray 1 comes into contact with the paper 2 and rotates. The paper 2 sent out by the paper feed roller 3 enters the nip of the feed roller 4 and the separation roller 5 on the downstream side, and is fed into the paper transport path constituted by the guide members 7 and 8 while being separated one by one. . A pair of transport rollers 9 and 10 are provided in the paper transport path, and the sheet 2 in the paper transport path is transported from the upstream side to the downstream side by the transport roller pairs 9 and 10. The transport roller 9 is
It is supported by the image forming apparatus main body (hereinafter, apparatus main body) 6 side,
It functions as a drive roller to which drive is provided from a drive unit (not shown) in the main body 6. The conveying roller 10 is provided with a guide member 8.
And functions as a driven roller pressed against the transport roller 9. A pair of registration rollers 11 and 12 are provided on the downstream side of the sheet conveyance path, and receive the sheet 2 sent by the pair of conveyance rollers 9 and 10 and carry it out to the image forming unit. The timing of carrying out the sheet 2 by the pair of registration rollers 11 and 12 is performed in synchronization with the latent image on the photoconductor 13. One of the guide members 8 constituting the paper transport path has an openable and closable structure, is opened in the direction of arrow A about the fulcrum 15, and is set on the apparatus main body 6 by the magnet 14. When the guide member 8 is opened, the inside of the paper transport path is exposed to the outside. Next, as shown in FIGS. 2 and 3, a paper pushing member 21 is provided in the apparatus main body 6 so as to be swingable about a fulcrum 20 as an axis. That is,
Of the paper pushing member 21 is a fulcrum at the rear of the conveying roller 9.
20 and the tip 21a is swingably attached.
It is composed. Tip 21a of paper pushing member 21
Constitutes a part of the guide member 7 on the inside of the apparatus when the sheet is transported, as shown in FIG. When the guide member 8 on the outside of the machine is opened, the sheet pushing member 21 is rotated to the outside of the machine and pushes a sheet jammed on the sheet transport path. In the figure, reference numeral 22 denotes a link member, which enables the sheet pushing-out member 21 to operate with the opening of the guide member 8. The link member 22 is attached to the guide member 8 at one end thereof at a position offset from the fulcrum 15. A long hole 22a is formed at the other end of the link member 22, and is slidably fitted on the shaft 21b at a position offset from the fulcrum 20 of the paper pushing member 21. As a result, when the guide member 8 is turned outward as shown in FIG.
Of the sheet push-out member 21 is pulled out. Sheet located in front of the sheet pushing member 21 is pushed out by the tip portion 21a of the member. As shown in FIG. 2, the nip of the feed roller 4 and the separation roller 5 and the pair of registration rollers 11, 1
When paper 2 ( not shown ) is sandwiched between the two (see FIG. 1)
, This paper sheet 2, upon opening of the guide member 8 is pushed out to the outside of the apparatus by the sheet pushing member 21 as shown in FIG. 3, since a state in which slack has been formed, it is easy to take out. When the guide member 8 is returned to the original position after the sheet 2 is removed, the sheet pushing member 21
Is pulled back into the machine by the force of, and hits the stopper 24 and is set at the initial position. That is, the guide member 8 is
When set in the main body 6, the paper pushing member 21 is
Pulled back by the spring 23 and abuts the stopper 24
Thus, it becomes a part of the guide member 7. As described above, when the guide member 8 is released from the apparatus main body 6, the sheet pushing member 2 is linked by the link member 22.
1 moves forward in the paper transport path and pushes out the paper 2 jammed in the transport path. At this time, the tip of the paper pushing member 21
The portion 21a is moved forward of the transport roller 9 while maintaining the vertical state. This prevents the transport roller 9 from being touched and damaged when the paper is taken out. As described above, the paper conveying device of the present invention conveys the paper by the leading end of the paper pushing member that interlocks with the opening and closing of the external guide member. The paper jammed on the road can be pushed out of the machine, and the remaining paper processing can be performed quickly and easily. Also this
When the guide member on the outside of the machine is opened, the leading end of the paper pushing member
The unit is in front of the transport roller while maintaining its posture.
Is moved to the outside of the aircraft. For this reason, transport
There is no direct contact with the feed roller, and the feed roller is damaged.
There is an effect that it is not attached or soiled . [0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of the inside of an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a side view showing a sheet conveying device according to the embodiment of the present invention. FIG. 3 is a side view corresponding to FIG. 2 in a state where a guide member is opened. DESCRIPTION OF THE SYMBOLS 1 Paper feed tray 2 Paper 3 Paper feed roller 4 Feed roller 5 Separation roller 6 Main unit 7 Inside guide member 8 Outside guide member 9, 10 Transport rollers 11, 12 Registration roller 13 Photoconductor 14 Magnets 15 and 20 Support point 21 Paper pushing member 22 Link member 23 Spring 24 Stopper

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 5/06 B65H 5/38 B65H 7/06

Claims (1)

(57) [Claims] 1. A guide member forming a part of a paper transport path.
Open outside the housing of the image forming apparatus to expose the paper transport path.
To remove the paper on the paper transport path.
In a sheet conveying device of an image forming apparatus,The guide member is opened to the outside of the housing to expose the paper transport path.
The outside guide member and the inside guide member
Composed, From the inside of the paper transport path to the paper on the paper transport path to the outside
Paper extruding member to extrude and this paper extruding member
Interlocking machine that operates with the opening of the guide member on the outside of the machine
With the structure, The paper push-out member is provided in the paper transport path.
Oscillating with the position inside the machine, which is behind the feed roller, as a fulcrum
The paper pushing member has a tip
The end is swingably mounted, and the tip is
Forming a part of the inner guide member, During the operation of the paper pushing member by the interlocking mechanism,
While maintaining the posture state, the leading end is
Must be located outside the aircraft, in front of
A sheet transport device for an image forming apparatus, comprising: