JPH09290942A - Paper sheet carrying device of image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and easily treat a left paper sheet by pushing out the jammed paper sheet in a paper sheet carrying passage as a guide member is opened outside a device so as to catch the jammed paper sheet. SOLUTION: A guide member 8 to form a part of a paper sheet carrying passage of an image forming device is opened outward of a box of the image forming device to expose the paper sheet carrying passage so as to easily take out the paper sheet on the paper sheet carrying passage. A paper sheet push-out member 21 to push out the paper sheet on the paper sheet carrying passage from the inside of the paper sheet carrying passage to the outside thereof, and an interlocking mechanism 22 to operate the paper sheet push-out member as the guide member 8 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device of an image forming apparatus, and more particularly to a sheet conveying device having a mechanism for removing a sheet jammed in a sheet conveying path.

[0002]

2. Description of the Related Art In an image forming apparatus, a guide member for guiding a sheet in a sheet conveying path is opened and closed, and when the sheet jams in the sheet conveying path, the guide member is opened to remove the remaining sheet. The removal process is performed. However, if a long size sheet remains across the upstream transport roller pair and the downstream transport roller pair, or if the sheet is statically stuck to the transport path, There is a problem that it is difficult to take out the machine.

On the other hand, conventionally, there is a device in which a paper jam can be easily removed by making a guide member detachable from a feed roller (actually, the opening number is 3-9144).
(See Japanese Patent Publication No. 3). However, even in this case, it is not easy to take out the paper adhering to the inside of the conveying path, and there is a problem that the workability of the jam processing is still poor.

Conventionally, one end of a spring for urging the above-mentioned opening / closing type guide member to a conveying path forming position is made movable so as to weaken the urging force of the entire guide member to facilitate jam processing. (See Japanese Patent Laid-Open No. 4-179649). However, even with such a configuration, it is not easy to take out the paper that is attached or pinched in the transport path, and there is a problem that the paper is still not easily taken out.

Further, conventionally, there is one which attempts to facilitate the removal of a sheet jammed in the conveying path by releasing the guide member at the same time when the sheet is sent to the removal position (JP-A-5-10).
0523 publication). However, in this case, it is necessary to feed the paper to the removal position, and there is a problem that the workability is poor.

[0006]

SUMMARY OF THE INVENTION Therefore, in order to solve the above-mentioned conventional problems, an object of the present invention is to eject a sheet jammed in a sheet conveying path to the outside of the machine together with opening of a guide member. It is an object of the present invention to provide a sheet conveying device that can be easily grasped and that can quickly and easily carry out remaining sheet processing.

[0007] Further, when the openable guide member is opened to perform the remaining paper processing, there is a fear that the carrying roller installed on the paper carrying path is damaged or soiled during the working operation to deteriorate the carrying performance. There is. Therefore, another object of the present invention is to protect the carrying roller during the remaining paper processing by covering the carrying roller on the paper carrying path from the outside when the guide member is opened.

Further, when it is necessary to replace or maintain the conveying rollers on the sheet conveying path due to damage or service life, in the case of a member assembled in the machine body, a guide member fixed to the machine body or an exterior. There is a problem that the workability is extremely poor because the work etc. has to be removed. Therefore, it is still another object of the present invention to open the guide member so that the carrying roller can be projected to the outside of the machine and can be detached, thereby facilitating replacement and maintenance of the carrying roller.

[0009]

According to a first aspect of the present invention, there is provided a paper conveying device for an image forming apparatus, wherein a guide member forming a part of a paper conveying path is opened to the outside of the housing of the image forming apparatus. In the paper conveying device of the image forming apparatus capable of taking out the paper on the paper conveying path by exposing the paper conveying path, a paper pushing member for pushing the paper on the paper conveying path to the outside from the inside of the paper conveying path, An interlocking mechanism for operating the paper pushing member along with opening of the guide member is provided.

A second aspect of the present invention is characterized in that, when the sheet pushing member operates, a part of the sheet pushing member is positioned in front of a feeding roller provided in the sheet feeding path.

According to the third aspect of the present invention, the paper-pushing member is supported by supporting the conveying roller in the paper-conveying path on a swinging member that is swingably supported by the casing of the image forming apparatus. It is characterized in that the conveying roller is detachable from the swing member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a sheet conveying device according to the first embodiment of the present invention. The paper 2 stored in the paper feed tray 1 as shown in FIG. 1 is sent out from the paper feed tray 1 when a paper feed roller 3 arranged above the paper feed tray 1 contacts the paper 2 and rotates. The paper 2 delivered by the paper feed roller 3 enters the nip between the feed roller 4 and the separation roller 5 on the downstream side, and is delivered into the paper transport path constituted by the guide members 7 and 8 while being separated one by one. . A pair of conveying rollers 9 and 10 are installed in the sheet conveying path, and the sheet 2 in the sheet conveying path is provided with the pair of conveying rollers 9 and 10.
Is transported from the upstream side to the downstream side. The transport roller 9 is supported on the image forming apparatus main body (hereinafter, referred to as an apparatus main body) 6 side and functions as a drive roller to which a drive unit in the main body 6 (not shown) is given a drive. The transport roller 10 is supported by the guide member 8 and functions as a driven roller pressed against the transport roller 9. A pair of registration rollers 11 and 12 is installed on the downstream side of the sheet conveyance path.
The paper 2 sent by is received and is carried out toward the image forming unit. The timing of unloading the sheet 2 by the pair of registration rollers 11 and 12 is synchronized with the latent image on the photoconductor 13.

One of the guide members 8 constituting the sheet conveying path has an openable and closable structure, is opened in the direction of arrow A around the fulcrum 15 and is set in 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 sheet pushing member 21 is provided in the apparatus body 6 so as to be swingable about a fulcrum 20. As shown in FIG. 2, the leading end portion 21a of the paper pushing member 21 constitutes a part of the guide member 7 inside the machine when the paper is conveyed. The paper push-out member 21 is for rotating the paper outside the machine and pushing out the jammed paper on the paper transport path when the guide member 8 outside the machine is opened. In the figure, reference numeral 22 denotes a link member, and the link member 22 enables the operation of the sheet pushing member 21 as the guide member 8 is opened. The link member 22 has its one end supported by the fulcrum 1 with respect to the guide member 8.
It is installed at a position offset from 5. A long hole 22a is formed on the other end side of the link member 22, and is slidably fitted to a 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 rotated outward as shown in FIG. 3, the elongated hole 22a of the link member 22 is formed.
End of the sheet hits the shaft 21b, and as a result, the sheet pushing member 21 is pulled out to the outside. The sheet located in front of the sheet pushing member 21 is pushed outward by the tip 21a of the member. As shown in FIG. 2, the feed roller 4
Nip of separating roller 5 and pair of registration rollers 11 and 12
When the guide member 8 is opened, the sheet 2 sandwiched therebetween is pushed out of the machine by the sheet pushing member 21 as shown in FIG. 3, slack is formed, and the sheet 2 is easily taken out. When the guide member 8 is returned to the original position after removing the paper, the paper pushing member 21 is pulled back into the machine by the force of the spring 23, hits the stopper 24, and is installed at the initial position.

FIG. 4 and FIG. 5 show a sheet conveying device according to the second embodiment of the present invention. In this embodiment, the same parts as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, the paper pushing member 21 is configured such that the rear side of the transport roller 9 is a fulcrum 20 and a tip portion 21a is swingably attached. When the guide member 8 is released from the apparatus main body 6, the sheet pushing member 21 is moved forward by the link member 22 by the link member 22 to push the sheet jammed in the feeding path, as in the previous embodiment. At this time, the front end 21a of the paper pushing member 21
Is moved in front of the transport roller 9 while maintaining its vertical state. This prevents the transport roller 9 from being touched and damaged when the paper is taken out. When the guide member 8 is set in the apparatus main body 6, the paper pushing member 21 is pulled back by the spring 23,
It comes into contact with the stopper 24 and becomes a part of the guide member 7.

6 and 7 show a sheet conveying device according to the third embodiment of the present invention. Also in this embodiment, the same components as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, the paper pushing member 25 is configured to support the conveying roller 9 at its tip. As shown in FIG. 6, with the sheet pushing member 25 housed in the apparatus main body 6, the roller 28 integrated with the conveying roller 9 contacts the driving roller 27 driven by the belt 26, and the conveying roller 9 is It is rotationally driven by this power.

The carrying roller 9 is detachably supported on the paper pushing member 25, and can be detached from the paper pushing member 25 at the time of maintenance or replacement. As in the case of the previous embodiment, the paper pushing member 25 is provided with the guide member 8 via the link member 22.
It is connected to. Therefore, when the guide member 8 is opened to the outside of the machine as shown in FIG. 7, the paper pushing member 25 is pulled out accordingly. In this case, if there is a jammed paper on the paper transport path, the transport roller 9 pushes this out of the machine, and the paper can be easily taken out. further,
The transport roller 9 is located outside the machine with the guide member 8 opened, and can be easily removed from the paper pushing member 25 for maintenance or replacement. When the guide member 8 is closed and returned to its original position after the maintenance or replacement of the transport roller 9, the paper pushing member 25 is pulled back by the spring 23, and the roller 28 and the drive roller 27.
Contact is maintained.

[0019]

As described above, the sheet conveying device according to the first aspect of the invention can push the sheet jammed on the sheet conveying path to the outside of the machine by the sheet pushing member that is interlocked with the opening and closing of the guide member. There is an effect that the remaining paper processing can be performed quickly and easily.

In addition to the effect of claim 1, the sheet conveying device according to claim 2 has a part of the sheet pushing member located in front of the conveying roller when the guide member is opened. There is an effect that it is not touched and the transport roller is not damaged or soiled.

In addition to the effect of the first aspect, the sheet conveying device of the third aspect supports the conveying roller in the sheet conveying path on a swinging member that is swingably supported by the casing of the image forming apparatus. By configuring the paper pushing member and detaching the carrying roller with respect to the swinging member, the carrying roller is located outside the machine when the guide member is opened, which facilitates replacement or maintenance of the carrying roller. Has the effect of becoming.

[Brief description of drawings]

FIG. 1 is a schematic side view of the inside of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view showing a sheet conveying device according to the first embodiment of the present invention.

FIG. 3 is a side view corresponding to FIG. 2 with a guide member opened.

FIG. 4 is a side view showing a sheet conveying device according to a second embodiment of the present invention.

FIG. 5 is a side view corresponding to FIG. 4 with the guide member opened.

FIG. 6 is a side view showing a sheet conveying device according to a third embodiment of the present invention.

FIG. 7 is a side view corresponding to FIG. 7 with the guide member opened.

[Explanation of symbols]

 1 Paper feed tray 2 Paper 3 Paper feed roller 4 Feed roller 5 Separation roller 6 Machine body 7 Machine inside guide member 8 Machine outside guide member 9, 10 Conveying roller 11, 12 Registration roller 13 Photoconductor 14 Magnet 15, 20 Support point 21, 25 Paper pushing member 22 Link member 23 Spring 24 Stopper 26 Belt 27 Drive roller 28 Roller

Claims (3)

[Claims] 1. A sheet of an image forming apparatus capable of taking out a sheet on the sheet conveying path by opening a guide member forming a part of the sheet conveying path to the outside of the housing of the image forming apparatus to expose the sheet conveying path. The transport device includes a sheet pushing member that pushes the sheet on the sheet feeding path from the inside of the sheet feeding path to the outside, and an interlocking mechanism that operates the sheet pushing member when the guide member is opened. Paper transport device for image forming apparatus. 2. The sheet of the image forming apparatus according to claim 1, wherein a part of the sheet pushing member is located in front of a feeding roller provided in the sheet feeding path when the sheet pushing member operates. Transport device. 3. The paper pushing member is constituted by supporting a carrying roller in the paper carrying path on a swinging member which is swingably supported on a casing of the image forming apparatus, and the carrying roller is provided. The sheet conveying device of the image forming apparatus according to claim 1, wherein the sheet conveying device is detachable from the swing member.