JP2006341987A - Manual paper feeder and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual paper feeder so formed that paper on a manual feed tray does not fall even if a vertical carrying door is opened when the manual paper feeder is used and an image forming device. <P>SOLUTION: In this manual paper feeder, the manual feed tray 7 is openably installed at the vertical carrying door 5 openably installed on the side face of an image forming device body 1 to open and close a vertical carrying route 2. A fall prevention claw 10 is fitted to the free end of the manual feed tray 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a manual sheet feeder provided with a manual feed tray protruding from a side surface of an image forming apparatus main body, and an image forming apparatus equipped with the manual sheet feeder.

A conventional example will be described with reference to FIGS.
6 is a front view showing a state when the manual paper feeder is used in an image forming apparatus according to a conventional example, FIG. 7 is a front view showing a state when not being used, and FIG. 8 is an image forming apparatus according to a conventional example. FIG. 6 is a front view showing a state in which the vertical feeding door is opened when the manual paper feeder is used.
Inside the image forming apparatus main body (hereinafter referred to as the main body) 1, there is provided a vertical conveyance path 2 that conveys the paper upward from the lower paper feeding unit A to the paper discharge unit C through the image forming unit B. A vertical transfer door 5 having a transfer roller 4 that contacts the transfer roller 3 on the side is provided on the side surface of the main body 1. The lower end of the vertical transfer door 5 is pivotally supported on the main body 1 by a pivot fulcrum 6. The vertical transfer door 5 is in a state in which the vertical transfer path 2 is closed as shown in FIG. 6 and as shown in FIG. 2 is rotated and displaced to the open state.
Further, one end of the manual feed tray 7 is pivotally supported by the rotation fulcrum 8 so as to be openable and closable with respect to the vertical transfer door 5. A manual paper feed device is configured by the manual feed tray 7 on which the paper P is stacked and the paper feed roller 9 that feeds the paper P to the vertical conveyance path 2. When the manual sheet feeder is not used, the manual tray 7 is closed and accommodated in the vertical transfer door 5 as shown in FIG.

In the conventional image forming apparatus, as shown in FIG. 8, when the vertical conveyance door 5 is opened for jam processing in the vertical conveyance path 2 and the like with the paper P loaded on the manual tray 7, the manual tray 7 is inclined so that the upper surface of the sheet 7 is inclined downward and the free end (end opposite to the shaft support part) is downward, and as a result, the paper P falls from the manual feed tray 7. There was a bug that it was.
The present invention has been made in consideration of the above-described circumstances, and provides a manual sheet feeding device and an image forming apparatus having a structure in which the paper on the manual tray does not fall even when the vertical conveyance door is opened when the manual sheet feeding device is used. The purpose is to do.

In order to achieve the above object, a first aspect of the present invention is directed to a vertical transfer door provided on the side of the image forming apparatus main body so as to be openable and closable so as to open and close the vertical transfer path, and In the manual sheet feeder provided with the supported manual feed tray, a fall prevention claw is provided at a free end of the manual feed tray.
The invention according to claim 2 is characterized in that the fall-preventing claw according to claim 1 is provided so as to be able to move in and out of the manual feed tray, and is elastically biased so as to protrude toward the paper placing surface side of the manual feed tray. To do.
According to a third aspect of the present invention, in the second aspect, the fall prevention claw is accommodated in the manual feed tray by the pressure applied by the weight of the end of the paper and abutment with the structure of the vertical transfer door when the manual feed tray is closed. It is characterized by being.
According to a fourth aspect of the present invention, an image forming apparatus including the manual sheet feeding device according to any one of the first to third aspects is the main feature.

  The present invention relates to a manual sheet feeding device in which a manual feed tray is openable and closable at a vertical transfer door provided on the side surface of the image forming apparatus main body so as to open and close the vertical transfer path. By providing the fall prevention claw, it is possible to prevent the paper on the manual feed tray from dropping even when the vertical conveyance door is opened when the manual paper feeder is used.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same location as the prior art example shown after FIG. 6, and the overlapping description is abbreviate | omitted.
FIG. 1 is a front view showing a state when a manual sheet feeding device is used in an image forming apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram when the manual sheet feeding device is used in the image forming apparatus according to the embodiment of the present invention. And it is a front view which shows the state which open | released the vertical conveyance door.
In the image forming apparatus of the present embodiment, the fall prevention claw 10 is protruded toward the paper placement surface at the free end (the end opposite to the shaft support portion) of the manual feed tray 7. Therefore, the end portion (upstream end portion in the paper feeding direction) of the paper P is regulated by the fall prevention claw 10, and the manual feed tray 7 is inclined so that the free end of the manual feed tray 7 is downward as shown in FIG. However, the paper P does not slide down from the manual feed tray 7.
FIG. 3 is a diagram showing the displacement of the fall prevention claw. The fall prevention claw 10 is pivotally supported by a pivot fulcrum 11 provided on the manual feed tray 7 so as to rotate in the direction of the arrow, and is attached so as to protrude outward as shown in FIG. It is energized. However, when the stopper portion 10-1 is brought into contact with a side wall bent portion (not shown) of the manual feed tray 7, as shown in (1), the position is vertically protruded. When a force for rotating the fall prevention claw 10 counterclockwise against the urging force of the torsion spring is applied, the fall prevention claw 10 is accommodated in the manual feed tray 7 as shown in (2). .
FIG. 4 is a diagram illustrating a state in which the end portion of the large-size sheet is applied to the end portion of the fall prevention claw 10. When the end portion of the large-sized paper P hits the end portion of the fall prevention claw 10, the fall prevention claw 10 rotates counterclockwise against the biasing force of the torsion spring due to its weight, and the manual feed tray 7 is accommodated. The paper contact surface of the manual feed tray 7 is tapered so as to be in sliding contact with the paper so that it can be easily rotated. Further, the weight of the end portion of the paper P needs to be set larger than the biasing force of the torsion spring.
FIG. 5 is a front view showing a state when the manual sheet feeder is not used in the image forming apparatus according to the embodiment of the present invention. When the manual feed tray 7 is accommodated in the vertical transfer door 5 when the manual feed device is not used, the fall prevention claw 10 abuts against a structure (not shown) of the vertical transfer door 5 to rotate, and the manual feed tray 7. Housed inside.
The manual paper feed tray of the present invention can be applied to image forming apparatuses such as copying machines, printers, and facsimile machines.

FIG. 3 is a front view illustrating a state when the manual sheet feeding device is used in the image forming apparatus according to the embodiment of the invention. FIG. 3 is a front view illustrating a state in which the vertical conveyance door is opened when the manual sheet feeding device is used in the image forming apparatus according to the embodiment of the present invention. The figure which shows the displacement of a fall prevention nail | claw. The figure which shows the state which the edge part of the large sized paper applied to the edge part of the fall prevention nail | claw 10. FIG. 3 is a front view illustrating a state when the manual sheet feeding device is not used in the image forming apparatus according to the embodiment of the invention. FIG. 9 is a front view showing a state when a manual sheet feeder is used in an image forming apparatus according to a conventional example. The front view which shows the state at the time of non-use in the image forming apparatus which concerns on a prior art example. In the image forming apparatus according to the conventional example, a front view showing a state in which a manual sheet feeder is used and a vertical conveyance door is opened.

Explanation of symbols

1 image forming apparatus main body, 2 vertical conveyance path, 5 vertical conveyance door, 7 manual feed tray, 10 fall prevention claw

Claims (4)

  In a manual sheet feeder provided with a vertical conveyance door that is openable and closable on the side surface of the image forming apparatus main body to open and close the vertical conveyance path, and a manual tray that is pivotally supported by the vertical conveyance door. A manual paper feed device, wherein a fall prevention claw is provided at a free end of the manual feed tray.   2. The manual sheet feeding device according to claim 1, wherein the fall-preventing claw is provided so as to be able to move in and out of the manual feed tray, and is elastically biased so as to protrude toward the paper placing surface of the manual feed tray.   The said fall prevention nail | claw is accommodated in a manual feed tray by the applied force by the weight of a paper edge part, and abutment with the structure of the vertical conveyance door at the time of a manual feed tray being closed. Manual paper feeder. An image forming apparatus comprising the manual sheet feeding device according to claim 1.

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