JP6540076B2 - Paper conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus for conveying a sheet through a sheet conveying path between a fixed guide and a movable guide rotated in a direction approaching or separating from the fixed guide, and a copying machine having such a sheet conveying apparatus. The present invention relates to an image forming apparatus such as a machine, a printer, a facsimile, and a complex machine of these. In particular, when the sheet is jammed in the sheet conveyance path between the movable guide and the fixed guide, the sheet conveyance path is also performed under a situation where the angle at which the movable guide is pivoted in the direction of moving away from the fixed guide is limited. The present invention is characterized in that it is possible to easily detect the jammed paper and easily and appropriately take out the paper jammed in the paper conveyance path from between the movable guide and the fixed guide.

  In an image forming apparatus such as a copying machine, a printer, a facsimile, or a multifunction machine of these, sheets are conveyed by a sheet conveyance device through a sheet conveyance path. For example, the sheet conveyed from a sheet feeding cassette is conveyed The apparatus conveys the sheet to the image forming unit through the sheet conveyance path.

  When the sheet is transported by the sheet transport apparatus through the sheet transport path as described above, the sheet may be jammed in the sheet transport path.

  For this reason, conventionally, as disclosed in Patent Document 1 etc., a movable guide is provided that is pivoted in a direction to approach and separate from the fixed guide with a portion on the upstream side in the sheet conveyance direction outside the fixed guide as a fulcrum. The movable guide is pivoted in the direction of bringing the movable guide into proximity to the fixed guide so that the sheet is conveyed through the sheet conveyance path between the movable guide and the fixed guide, and when the sheet is jammed in the sheet conveyance path The movable guide is pivoted in the direction of separating it from the fixed guide, and the sheet jammed in the sheet conveyance path is taken out from between the movable guide and the fixed guide.

  However, in recent years, along with the downsizing of the image forming apparatus, the sheet conveyance path formed by the fixed guide and the movable guide is miniaturized, and the movable guide is separated from the fixed guide. The angle of rotation is also limited.

  For this reason, it becomes difficult to detect that the sheet is jammed in the sheet conveyance path, and when the sheet is jammed in the sheet conveyance path, the movable guide is largely rotated in a direction to separate the fixed guide from the fixed guide. There is a problem that it becomes difficult to take out the sheet jammed in the sheet conveyance path between the movable guide and the fixed guide.

JP, 2011-32040, A

  The present invention relates to the various problems as described above in the sheet conveying apparatus in which the sheet is conveyed through the sheet conveyance path between the fixed guide and the movable guide rotated in the direction approaching and separating from the fixed guide. To solve the problem.

  That is, in the present invention, even in the case where the angle for rotating the movable guide in the direction for moving the movable guide away from the fixed guide is limited in the above-described sheet conveying apparatus, the sheet jammed in the sheet conveying path is easily detected. It is an object of the present invention to make it possible to easily and properly take out a sheet jammed in a sheet conveyance path from between a movable guide and a fixed guide.

In the sheet conveying apparatus according to the present invention, in order to solve the problems as described above, an inner fixed guide forming a sheet conveyance path, and a fixed guide having a portion on the upstream side of the sheet conveyance direction outside the fixed guide as a fulcrum And the movable guide is rotated in the direction to move the movable guide closer to the fixed guide, and the paper transport path between the movable guide and the fixed guide is provided. In the sheet conveying apparatus for conveying a sheet, a notch is provided at the end of the movable guide on the downstream side in the sheet conveyance direction , and it is possible to detect that the sheet is jammed in the sheet conveyance path through the notch. When the sheet is jammed in the sheet conveyance path, the movable guide is rotated in a direction to separate it from the fixed guide, and the movable guide Increase the gap between the fixed guide and the downstream end of the paper transport direction, and pinch a part of the jammed paper through the above-mentioned notch to make the jammed paper between the movable guide and the stationary guide. I took it out from .

Then, in the sheet conveying apparatus according to the present invention , it is detected that the sheet is jammed in the sheet conveying path through the notch provided at the end of the movable guide on the downstream side in the sheet conveying direction in the movable guide When a part of the paper jammed in the paper conveyance path is pinched with a finger or the like from the notch portion and the jammed paper is removed from between the movable guide and the fixed guide , the paper jammed in the paper conveyance path It becomes possible to easily take out the sheet from between the movable guide and the fixed guide .

  Here, in order to provide the notched portion at the end portion of the movable guide on the downstream side in the sheet conveyance direction of the movable guide as described above, at least two notched portions are provided at the center portion in the width direction of the movable guide It is preferable to provide. According to this configuration, the movable guide and the fixed guide are held parallel to each other by gripping two sheets of the sheet jammed in the sheet conveyance path through the two notches provided at predetermined intervals, with a finger or the like. It is possible to prevent the sheet from being torn and a part of the sheet remaining in the sheet conveyance path.

Further, when the light transmitting sheet member is provided at the end of the movable guide on the downstream side in the sheet conveyance direction in the movable guide provided with the notched portion as described above, the light transmitting sheet member is provided. The sheet jammed in the sheet conveyance path can also be detected through the portion constituted by the sheet members.

  Further, in the above-described sheet conveying apparatus, a sheet feeding roller is provided on the upstream side of the sheet conveying direction with respect to the sheet conveying path, and the sheet fed by the sheet feeding roller is interposed between the fixed guide and the movable guide. Can be transported through the paper transport path of

  Further, in the image forming apparatus according to the present invention, the above-described sheet conveying apparatus is used to convey the sheet.

  In the sheet conveying apparatus according to the present invention, as described above, the notch is provided at the end of the movable guide on the downstream side of the sheet conveyance direction, so that the angle for rotating the movable guide in the direction separating from the fixed guide is limited. In such a case, it is possible to properly detect that the sheet is jammed in the sheet conveyance path through the notch, and a part of the sheet jammed in the sheet conveyance path from the portion of the notch By pinching with a finger etc., the jammed paper can be easily taken out from between the movable guide and the fixed guide.

An image forming apparatus using a sheet conveying apparatus according to an embodiment of the present invention and guiding a sheet fed by a sheet feeding roller to an image forming unit through a sheet conveyance path between a fixed guide and a movable guide It is the schematic explanatory drawing shown. FIG. 8 is a partial schematic explanatory view showing a state in which a sheet fed by a sheet feed roller is transported through a sheet transport path between a fixed guide and a movable guide in the sheet transport apparatus of the embodiment. FIG. 7 is a partial schematic explanatory view showing a state in which a sheet fed by a sheet feed roller is jammed in a sheet conveyance path in the sheet conveyance device of the embodiment. FIG. 10 is a partial schematic perspective view showing a state in which a jam processing door is provided at the lower part of the image forming apparatus to open and close the jam processing portion in the lower part of the image forming apparatus in the sheet conveying apparatus of the embodiment. In the sheet conveying apparatus according to the embodiment, a translucent sheet member in which the sheet jammed in the sheet conveying path is provided at the end of the movable guide on the downstream side in the sheet conveying direction with the jam processing door opened. It is the partial schematic front view which showed the state which confirms through a notch. In the sheet conveying apparatus according to the embodiment, in a state in which the jam processing door is opened, the end portion of the movable guide on the downstream side in the sheet conveying direction is rotated in a direction to separate from the fixed guide, and the sheet is jammed in the sheet conveying path. FIG. 10 is a partial schematic explanatory view showing a state in which a sheet of paper is taken out of the sheet conveyance path through a notch with a finger or the like.

  Next, a sheet conveying apparatus according to an embodiment of the present invention and an image forming apparatus using the sheet conveying apparatus will be specifically described based on the attached drawings. The sheet conveying apparatus and the image forming apparatus according to the present invention are not limited to those shown in the following embodiments, and can be appropriately modified and implemented within the scope of the present invention.

  In the image forming apparatus of this embodiment, as shown in FIG. 1, the sheet feeding cassette 2 in which the sheets S are stacked and stored is detachably attached to the lower part in the image forming apparatus 1, and this sheet feeding cassette The sheet S accommodated in 2 is guided by the sheet conveyance device 10 to the image forming unit 3 provided in the image forming apparatus 1, and the image forming unit 3 forms a toner image on the sheet S.

  Here, in the sheet conveying apparatus 10, as shown in FIGS. 1 and 2, the pickup roller 11 is brought into pressure contact with the sheet S accommodated in the sheet feeding cassette 2 with an appropriate pressure, and in this state The pickup roller 11 is rotated to feed the sheet S from the sheet feeding cassette 2 and to guide the sheet S between the sheet feeding roller 12 and the separating roller 13 so that the sheet S is double-fed. If the sheet S is fed between the sheet feed roller 12 and the sheet feed roller 13, the sheet S is guided to the sheet conveyance path R by the sheet feed roller 12. ing.

  Then, the sheet S thus guided to the sheet conveyance path R is sent to the pair of feed rollers 14a and 14b provided on the upstream side of the sheet conveyance path R through the sheet conveyance path R, and this feed roller The sheet S is guided to the image forming section 3 by 14a and 14b.

  Here, in the sheet conveying apparatus 10 in this embodiment, a fixed guide 15 for guiding the sheet S is provided on an inner portion between the sheet feed roller 12 and the feed rollers 14a and 14b, and On the outer side, a movable guide 16 is provided which is pivoted in a direction approaching or separating from the fixed guide 15 with a portion on the upstream side in the conveyance direction of the sheet S as a fulcrum. The sheet conveyance path R is formed between the movable guide 16 and the fixed guide 15.

  The elastic light transmitting sheet member 16a is attached to the end of the movable guide 16 on the downstream side of the conveyance direction of the sheet S, and the widthwise central portion of the movable guide 16 to which the sheet member 16a is attached is attached. Two notches 16b are provided at predetermined intervals. In the case where the two notches 16b are provided via the required interval as described above, the interval between the two notches 16b is smaller than the width of the minimum sheet S to be transported by the sheet transport apparatus 10 described above. To be

  Further, in this embodiment, when the sheet S jammed in the sheet conveyance path R is taken out from the sheet conveyance path R, as shown in FIG. 3 and FIG. The jam processing door 17 is provided to open and close the jam processing portion, and the outer feed roller 14b of the pair of feed rollers 14a and 14b is attached to the jam processing door 17 so as to jam the jam. When the processing door 17 is opened, the outer feed roller 14b is separated from the opposing inner feed roller 14a.

  In the sheet conveyance device 10, when the sheet S guided to the sheet conveyance path R by the sheet feed roller 12 is jammed in the sheet conveyance path R, the jam processing door 17 is formed. Is rotated in the horizontal direction to open the jam processing portion, and the movable guide 16 is exposed as shown in FIG.

  At this time, in the movable guide 16, as described above, the translucent sheet member 16a is attached to the downstream end of the sheet S in the conveyance direction, and the widthwise center of the movable guide 16 to which the sheet member 16a is attached Since two notches 16b are provided at a predetermined interval in the part, as shown in FIG. 5, the sheet is jammed in the sheet conveyance path R through the translucent sheet member 16a and the notches 16b. It becomes possible to easily check the sheet S.

  Further, when the sheet S jammed in the sheet conveyance path R is taken out from the sheet conveyance path R as described above, as shown in FIG. The movable guide 16 is rotated in the direction away from the fixed guide 15 as a fulcrum of the upstream portion of the transport direction, and the gap between the fixed guide 15 and the end of the movable guide 16 on the downstream side of the transport direction of the sheet S is enlarged. In this case, the gap between the movable guide 16 and the fixed guide 15 is further increased at the two notches 16 b provided at the downstream end of the sheet S in the conveyance direction.

  Then, put a finger from the two notches 16b where the gap with the fixed guide 15 has become large in this way, pinch two places of the sheet S jammed in the sheet conveyance path R, and make the sheet S parallel. In this state, the movable guide 16 and the fixed guide 15 are taken out. In addition, when putting a finger from the notch part 16b in this way, it is desirable to make the width | variety of this notch part 16b 20 mm or more so that a finger | toe may be inserted in the notch part 16b smoothly.

  In this way, the sheet S jammed in the sheet conveyance path R can be easily taken out from between the movable guide 16 and the fixed guide 15, and the sheet S is torn, and a part of the sheet S is the sheet conveyance path R It is also prevented that it stays inside.

  Here, when the sheet S is jammed due to the sheet S being jammed in the sheet conveyance path R, when the jam processing door 17 is rotated horizontally to open the jam processing portion as described above, As described above, the movable guide 16 rotates around the upstream side of the sheet S in the conveyance direction such that the end of the movable guide 16 on the downstream side in the conveyance direction of the sheet S is separated from the fixed guide 15. It can also be moved.

  Further, as described above, when the jam processing door 17 is rotated in the horizontal direction to take out the sheet S jammed in the sheet conveyance path R, the sheet cassette loaded in the image forming apparatus 1 Although not shown, a plunger solenoid or the like may be used to lock the sheet feeding cassette so as not to be taken out so as not to be taken out.

  Further, in this embodiment, although the case where one sheet feeding cassette 2 is attached to the image forming apparatus 1 has been described, although not shown, when a plurality of sheet feeding cassettes are attached vertically, each feeding It is possible to provide the above-described sheet conveying device in correspondence with the sheet cassette.

DESCRIPTION OF SYMBOLS 1 image forming apparatus 2 sheet feeding cassette 3 image forming unit 10 sheet conveying apparatus 11 pickup roller 12 sheet feeding roller 13 separating roller 14 a, 14 b feed roller 15 fixed guide 16 movable guide 16 a sheet member 16 b notch 17 for jam processing Door R Paper transport path S Paper

Claims (5)

The apparatus further comprises: an inner fixed guide forming a sheet conveyance path; and a movable guide outside the fixed guide and having a portion on the upstream side in the sheet conveyance direction as a fulcrum and pivoted in a direction toward and away from the fixed guide. A sheet conveyance apparatus for conveying a sheet through a sheet conveyance path between a movable guide and the fixed guide by rotating the movable guide in a direction to approach the fixed guide. A notch is provided at the end of the side so that it is possible to detect that the sheet is jammed in the sheet conveyance path through the notch, and the movable member is movable when the sheet is jammed in the sheet conveyance path. The guide is rotated in the direction of separating the fixed guide from the fixed guide to increase the gap between the fixed guide and the end of the movable guide on the downstream side in the sheet conveyance direction, Squeeze the part of jammed paper through part of the out portion, the sheet conveying apparatus characterized by taking out the jammed paper from between the movable guide and the fixed guide.   2. The sheet conveying apparatus according to claim 1, wherein at least two of the notches in the movable guide are provided at a central portion in the width direction of the movable guide via a predetermined interval. The sheet conveying apparatus according to claim 1 or 2, wherein the end of the movable guide on the downstream side in the sheet conveyance direction of the movable guide provided with the notch portion is translucent so as to exclude the notch portion . A sheet conveying apparatus comprising the sheet member of   The sheet conveying apparatus according to any one of claims 1 to 3, wherein a sheet feeding roller is provided on the upstream side in the sheet conveying direction with respect to the sheet conveying path, and the sheet fed by the sheet feeding roller A sheet conveying apparatus characterized in that the sheet is conveyed through a sheet conveying path between the fixed guide and the movable guide.   An image forming apparatus comprising a sheet conveying device for conveying a sheet, wherein the sheet conveying device according to any one of claims 1 to 4 is used.

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