JP2008184291A - Recording medium transport device, image forming device and recording medium post-processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium transport device for facilitating easy prevention of an error detection of a rear end of a recording medium to be transported, forming a high quality image and conducting a post processing having an excellent operability and an image forming device having the recording medium transport device and a recording medium post-processing device. <P>SOLUTION: The recording medium transport device is provided with a guiding means 1 for guiding an entering recording medium P in a transporting direction and sending it out, a detection hole 2 formed at a detection position where the rear end of the recording medium P in a transportation route of the recording medium P on the guiding means 1 is detected, an attaching means 4 for attaching a detection means 3 to a detection means arranging row for arranging a plurality of detection holes 2 in a main scanning direction orthogonal to the transportation direction of the recording medium P and a detection hole selection means 5 for selecting the detection hole 2 for detecting the rear end of the recording medium P from the detection hole arranging row. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording medium conveying apparatus, an image forming apparatus including the recording medium conveying apparatus, and a recording medium post-processing apparatus. More specifically, the present invention relates to a recording medium transport apparatus that guides and transports a recording medium in the transport direction. And an image forming apparatus such as an inkjet type printing machine that forms a recorded image on a recording medium with the recording medium conveying apparatus, a copying machine that forms an image by an electrophotographic method, a facsimile apparatus, a printer, or a complex machine of these About. Furthermore, the present invention relates to a recording medium post-processing apparatus that includes the recording medium conveying apparatus and performs post-processing of the recording medium after forming a recording image.

In a conventional recording medium conveying apparatus, an image forming apparatus including the recording medium conveying apparatus, and a recording medium post-processing apparatus, the conveying direction is detected by detecting front and rear edges or side edges of the recording sheet of the conveyed recording medium. A device for transporting the material is widely known.
For example, in the sheet passing control of the image forming apparatus, there is a case where the punch holes of the binder sheet are fed in a direction perpendicular to the transport direction and the leading end side of the sheet. In such a case, when the registration sensor detects a punch hole, the punch hole is erroneously detected as the trailing edge of the paper, and it is recognized as an extremely short paper. In some cases, paper cannot be passed.
Therefore, it has been proposed that when a binder sheet is selected, it is possible to pass the sheet without jamming by masking the sheet detection of the registration sensor for a predetermined time after detecting the presence of the binder sheet (patent) Reference 1).
This prevents erroneous detection due to punch holes when the user changes the setting when passing a binder sheet or the like with punch holes. However, it is necessary to change the setting each time, the operation is complicated, and operability cannot be reduced.

In a color image forming apparatus, a registration sensor that reads a correction pattern that has been recorded on a recording medium and then fixed by a fixing unit is arranged downstream of the fixing unit. Corrects the density and gloss. This registration sensor has been proposed to read a correction pattern with high accuracy through notches provided at positions corresponding to a pair of edge regions of a guide plate for conveying and guiding a recording medium (Patent Document 2). See).
In a sheet processing apparatus and an image forming apparatus including the sheet processing apparatus, two skew amount detection units that detect the skew amount of a sheet being conveyed, and skew correction that performs skew correction while conveying the sheet Means and punch means for punching the sheet. Furthermore, a punch driving means for driving the punch means, a punch moving means for moving the punch means in a direction crossing the sheet conveying direction, and a single sheet detecting means for detecting the sheet trailing edge in the sheet conveying direction are also provided. Yes. Then, after correcting the skew of the sheet by the skew correcting means based on the detection result of the skew amount detecting means, the punch position is controlled to be punched based on the output result of the sheet detecting means to improve the punch position accuracy. Has also been proposed (see Patent Document 3).
Further, when the skew correction roller pair conveys the sheet, and the sheet passes through the detection position of the entrance sensor, the entrance roller stops, and the sheet end portion used based on the sheet size information sent from the image forming apparatus. One of the detection sensors is determined. Next, the sheet edge detection sensor group is moved in a direction perpendicular to the sheet conveyance direction, and when the sheet edge is detected by the sensor, a lateral registration movement pulse is acquired. The movement pulse of the punching unit is calculated from the obtained lateral resist movement pulse, the sheet end detection sensor group is moved to the home position, and the punching unit is moved by the calculated pulse. It has also been proposed to perform punching processing with high productivity by operating the punch blade at that position to reduce the amount of movement of the end detection means and the amount of movement of the punching means (Patent Document 4). See).

FIG. 16 is a basic configuration diagram of a conventional image forming apparatus 1100.
In FIG. 16, the arrangement and use method of the detection means of the recording medium transport apparatus 1000 in the conventional general image forming apparatus 1100 will be described using the registration sensor 1001.
The recording paper of the recording medium P fed out from the paper supply unit 1101 is guided by the recording medium conveyance device 1000 and temporarily stopped by the registration roller pair 1002, and registration correction is performed so that the leading edge of the recording medium P is aligned at the nip portion. Do. The registration correction amount is determined from the distance between the registration sensor pair 1002 and the timing when the leading edge of the recording medium P passes through the registration sensor 1001. Subsequently, the registration roller pair 1002 is restarted, and the toner image of the recorded image is transferred to the recording paper of the recording medium P by the secondary transfer unit 1106.
The recorded image information of the four colors is formed into a latent image of four colors on the photosensitive drum of each image carrier 1102 by the optical writing unit 1103, and visualized by each developing unit 1104, and recorded image of color toner. Is formed. The recorded images of the color toners obtained by stacking the four colors are transferred to the recording medium P by the secondary transfer unit 1106 via the primary transfer unit 1105.
The recording medium P after the secondary transfer is conveyed from the secondary transfer unit 1106 to the fixing unit 1107, the color toner recording image is fixed on the recording medium P, and is discharged from the paper discharge unit 1108 to the stack unit 1109 for storage. The
In such a configuration of the image forming apparatus 1100, registration correction is performed for each page during continuous printing. However, the higher the productivity, the smaller the distance between the recording medium P being conveyed and the recording medium P needs to be shorter.
Therefore, it is necessary to stop the rotation of the registration roller pair 1002 immediately after the trailing edge of the previous page of the recording medium P has passed through the registration roller pair 1002.
Then, as soon as image formation preparation for the next page of the recording medium P is completed, the rotation of the registration roller pair 1002 is restarted as described above and the recording medium P is sent to the secondary transfer unit 1106 as soon as a predetermined page interval is completed.

FIG. 17 is an enlarged view of a conventional recording medium transport apparatus 1000. FIG. 18 is a perspective view of a conventional recording medium transport apparatus 1000.
17 and 18, a registration roller pair 1002 in a conventional recording medium transport apparatus 1000 includes a registration roller 1020 that performs main transport and a counter roller 1021 made of metal or the like that forms a pair.
The registration roller 1020 and the opposing roller 1021 of the registration roller pair 1002 are generally used in the main scanning width both for registration correction.
Further, when performing registration correction, a guide means 1003 is provided for guiding both ends of the recording paper of the recording medium P to the nip portion of the registration roller pair 1002 at the same timing as much as possible. For this purpose, the guide unit 1003 is provided with a pair of guide plates 1030 and a counter guide plate 1031 that guide the leading edge of the recording medium P conveyed from the paper supply unit 1101 to the nip portion of the registration roller pair 1002. The registration sensor 1001 is disposed in the vicinity of the nip portion of the registration roller pair 1002 in order to reduce variation in registration correction amount.
The registration sensor 1001 is attached to the registration stay 1004.
Since the registration sensor 1001 uses a reflection type photo interrupter, the guide plate 1030 and the counter guide plate 1031 are each provided with a sensor light path hole 1005 so as not to shield the sensor light path (see FIG. 18).
When the recording medium P having a punch hole is conveyed in advance so that it can be stored in a book file, a registration sensor 1001 is disposed at the position where the punch hole is opened. When the punch hole portion passes through such a configuration, it is erroneously detected at a timing that is not the trailing end of the original recording medium P, and a stop timing of a conveyance motor (not shown) is accelerated, causing problems such as jamming.

FIG. 19 is a cross-sectional view of the conventional recording medium transport apparatus 1000 in FIG.
In FIG. 19, in a configuration such as the recording medium transport apparatus 1000, the recording paper of the recording medium P having punch holes or the like is passed in the transport direction of the recording medium P in the direction of arrow A shown in the figure. When passing the recording medium P, if there is a punch hole or the like at the same position as the registration sensor 1001 in the main scanning direction indicated by the arrow B in the figure, the length of all the recording media P is detected by the registration sensor 1001. False positives will occur.
As a specific problem, when the interval between the pages of the recording medium P and the recording medium P is short due to high productivity specifications or the like, the registration roller pair immediately after the trailing edge of the recording medium P on the previous page passes through the registration roller pair 1002. The rotation of 1002 needs to be stopped.
Therefore, if the trailing edge is erroneously detected earlier than the trailing edge of the actual recording medium P at the punch hole, the rotation of the registration roller pair 1002 stops with the recording medium P remaining in the nip portion of the registration roller pair 1002. Resulting in. As a result, there is a problem that the image quality is deteriorated due to shock jitter and further jamming in the recorded image to be formed.
In such a case, when the registration sensor detects a punch hole, the punch hole is erroneously detected as the trailing end of the recording medium P, and is recognized as an extremely short recording medium P, and a conveyance failure state such as a paper jam occurs. turn into.
Therefore, it has been proposed that when a binder sheet is selected, it is possible to pass the sheet without jamming by masking the sheet detection of the registration sensor for a predetermined time after detecting the presence of the binder sheet (patent) Reference 1).
This prevents erroneous detection due to punch holes by changing the setting when passing a binder sheet or the like having punch holes. However, it is necessary to change the setting each time, the operation is complicated, and operability cannot be reduced.
Japanese Patent No. 3746657 JP 2004-177659 A JP 2005-306608 A JP 2006-16129 A

In a conventional recording medium transport apparatus, an image forming apparatus including the recording medium transport apparatus, and a recording medium post-processing apparatus, the rear end detection of the transported recording medium is detected by punch holes or the like rather than the actual rear end of the recording medium. Misdetection may occur early. The operation for preventing the erroneous detection is complicated and the operability is poor, and there is a problem that the image quality is deteriorated due to the occurrence of shock jitter and further jam in the recorded image to be formed.
Therefore, an object of the present invention is to solve such problems. That is, it is easy to prevent erroneous detection of the trailing edge of the recording medium to be transported, and provides a recording medium transporting apparatus that forms a high-quality image and performs post-processing, and an image forming apparatus including the recording medium transporting apparatus. The purpose is to do. Another object of the present invention is to provide a recording medium post-processing apparatus including the recording medium conveying apparatus.

In order to achieve the above object, the present invention described in claim 1 is a recording medium conveying apparatus for guiding and conveying a recording medium in the conveying direction, and a guiding means for guiding and feeding out the recording medium entering the conveying direction. A plurality of detection holes formed in a detection location for detecting the rear end of the recording medium in the recording medium conveyance path on the guide means, and a plurality of the detection holes in the main scanning direction perpendicular to the conveyance direction of the recording medium A recording medium conveying apparatus comprising: attachment means for attaching detection means to the detection hole arrangement row to be detected; and detection hole selection means for selecting the detection hole for detecting the rear end of the recording medium from the detection hole arrangement row. To do.
According to a second aspect of the present invention, in the recording medium conveying apparatus according to the first aspect, the guide means conveys the recording medium facing the guide plate and a guide plate that guides the recording medium in the conveying direction. It is a recording medium conveyance device provided with an opposing guide plate that guides in a direction.
According to a third aspect of the present invention, there is provided the recording medium transporting apparatus according to the first or second aspect, wherein the detection hole is located in the transport path of the recording medium on the guide means. The recording medium transporting apparatus is provided with a plurality of detection long holes that are connected in the main scanning direction orthogonal to the above.
According to a fourth aspect of the present invention, there is provided the recording medium transporting apparatus according to the first or second aspect, wherein the detection hole is disposed in the transport path of the recording medium on the guide means. The recording medium transporting apparatus is provided with a movable detection hole that moves in the main scanning direction orthogonal to the above.

According to a fifth aspect of the present invention, in the recording medium conveyance device according to the fourth aspect, the movable detection hole is movable separately from the guide plate and moves in the main scanning direction perpendicular to the conveyance direction of the recording medium. It is a recording medium conveying apparatus provided with a detection hole member.
According to a sixth aspect of the present invention, in the recording medium conveyance device according to any one of the first to fifth aspects, the detection hole, the detection elongated hole, or the movable detection hole is provided on the guide unit. It is a recording medium conveying apparatus having a hole shape in which the curvature on the upstream side in the conveyance direction of the recording medium is larger than the curvature on the downstream side in the conveyance path of the recording medium.
According to a seventh aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to sixth aspects, the detection unit is a recording medium conveying apparatus including a photosensor.
According to an eighth aspect of the present invention, in the recording medium conveying apparatus according to the seventh aspect, the guide means is a recording medium conveying apparatus including a plurality of transmitted light paths facing the photosensor. .
According to a ninth aspect of the present invention, in the recording medium conveying apparatus according to the eighth aspect, the transmitted light path is perpendicular to the conveying direction of the recording medium in the conveying path of the recording medium on the guide means. The recording medium transporting apparatus includes a plurality of transmission light path long holes that are connected in the main scanning direction.

According to a tenth aspect of the present invention, there is provided the recording medium conveying apparatus according to the eighth or ninth aspect, wherein the transmitted light path is arranged within the conveying path of the recording medium on the guiding means. The recording medium transporting apparatus includes a movable transmission optical path that moves in the main scanning direction perpendicular to the recording medium.
According to an eleventh aspect of the present invention, in the recording medium conveyance device according to the tenth aspect, the movable transmission optical path moves in a main scanning direction that is separate from the opposing guide plate and is orthogonal to the conveyance direction of the recording medium. It is a recording medium conveying apparatus provided with a movable transmission optical path member.
According to a twelfth aspect of the present invention, in the recording medium conveyance device according to any one of the eighth to eleventh aspects, the transmitted light path, the transmitted light path long hole, or the movable transmitted light path is on the guide means. The recording medium transport apparatus includes a hole shape in which the upstream curvature in the recording medium transport direction is larger than the downstream curvature in the recording medium transport path.
According to a thirteenth aspect of the present invention, in the recording medium conveyance device according to any one of the first to sixth aspects, the detection means is a recording medium conveyance device including a filler.
According to a fourteenth aspect of the present invention, in the recording medium conveying apparatus according to the thirteenth aspect, the guide means is a recording medium conveying apparatus including a plurality of submerged portions facing the filler.

According to a fifteenth aspect of the present invention, in the recording medium conveyance device according to the fourteenth aspect, the submergence unit moves the submergence unit directly in a conveyance direction of the recording medium in a conveyance path of the recording medium on the guide unit. It is a recording medium conveyance device provided with a submerged portion long hole that connects a plurality in the main scanning direction.
According to a sixteenth aspect of the present invention, in the recording medium conveying apparatus according to the fourteenth or fifteenth aspect, the submergence unit places the submerged unit in a recording medium conveyance path on the guide means in the conveyance direction of the recording medium. The recording medium transporting apparatus includes a movable submergence portion that moves in a main scanning direction that is orthogonal to the head.
According to a seventeenth aspect of the present invention, in the recording medium conveyance device according to the sixteenth aspect, the movable submergence unit is separate from the opposing guide plate and moves in a main scanning direction orthogonal to the conveyance direction of the recording medium. It is a recording medium conveyance device provided with a movable dive member.
The present invention according to claim 18 is the recording medium conveying apparatus according to any one of claims 14 to 17, wherein the submerged portion, the submerged portion long hole or the movable submerged portion is a recording medium on the guide means. The recording medium transport apparatus is provided with a hole shape in which the upstream curvature in the transport direction of the recording medium is larger than the downstream curvature.

According to a nineteenth aspect of the present invention, in the recording medium conveyance device according to any one of the thirteenth to eighteenth aspects, the filler is a recording medium conveyance device including a photosensor.
According to a twentieth aspect of the present invention, in the recording medium conveyance device according to any one of the first to nineteenth aspects, the attachment unit is a recording medium conveyance device including the detection unit. .
According to a twenty-first aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to twentieth aspects, the detection hole selecting unit is a main unit that goes straight on the mounting unit in the conveying direction of the recording medium. The recording medium conveying apparatus includes a plurality of movable attachment means for movably attaching the attachment position of the detection means in the scanning direction.
According to a twenty-second aspect of the present invention, in the recording medium conveying apparatus according to the twenty-first aspect, the movable attachment means includes an attachment portion formed on the attachment means, and the detection means engaged with the attachment portion. It is a recording medium conveyance device provided with an integral attachment engaging portion.
According to a twenty-third aspect of the present invention, in the recording medium conveyance device according to the twentieth, twenty-first, or twenty-second aspect, the detection unit is a recording medium conveyance device including the photosensor.

According to a twenty-fourth aspect of the present invention, in the recording medium conveying apparatus according to the twenty-third aspect, the photosensor is a recording medium conveying apparatus including a plurality.
According to a twenty-fifth aspect of the present invention, in the recording medium conveying device according to the twentieth, twenty-one or twenty-second aspect, the detection means is a recording medium conveying device including the filler.
According to a twenty-sixth aspect of the present invention, in the recording medium conveying apparatus according to the twenty-fifth aspect, the filler is a recording medium conveying apparatus including a plurality of fillers.
According to a twenty-seventh aspect of the present invention, in the recording medium conveying apparatus according to the twenty-fifth or twenty-sixth aspect, the filler is a recording medium conveying apparatus provided with a photosensor that detects movement of the filler. .
A twenty-eighth aspect of the present invention is the recording medium conveying apparatus according to any one of the first to twentieth aspects, wherein the detection hole selecting means includes a connecting filler for connecting a plurality of the fillers. It is a conveyance device.
A twenty-ninth aspect of the present invention is the recording medium conveying device according to the twenty-eighth aspect, wherein the connecting filler is a recording medium conveying device including a photosensor that detects movement of the connecting filler. .

According to a thirty-third aspect of the present invention, in the recording medium conveyance device according to any one of the twentieth to thirty-seventh aspects, the detection means determines whether there is a punch hole on the conveyed recording medium. The present invention is characterized in that the recording medium conveying apparatus includes a control unit that cancels processing.
According to a thirty-first aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to thirtieth aspects, the guide means conveys the entering recording medium in the conveying direction and conveys it downstream. The recording medium conveyance device includes a registration roller pair that performs registration correction by aligning the leading ends of the recording medium to be recorded.
According to a thirty-second aspect of the present invention, in the recording medium conveying apparatus according to any one of the first to thirty-first aspects, the guide means conveys the entering recording medium in the conveying direction and conveys it downstream. It is a recording medium conveying apparatus provided with the punch unit which perforates the recording medium to be recorded.

According to a thirty-third aspect of the present invention, there is provided an image forming apparatus for forming a recorded image on a recording medium, an image forming unit for forming a recorded image on a conveyed recording medium, and a recording for forming a recorded image by the image forming unit. It is an image forming apparatus provided with the said recording-medium conveying apparatus as described in any one of Claims 1 thru | or 32 which conveys a medium.
According to a thirty-fourth aspect of the present invention, in the image forming apparatus according to the thirty-third aspect, the image forming unit is an image forming apparatus that forms a toner recording image by an electrophotographic image forming process. And
According to a thirty-fifth aspect of the present invention, in a recording medium post-processing apparatus that performs post-processing of a recording medium after forming a recording image, the recording medium that is carried in after forming the recording image is guided and conveyed in the conveying direction. A recording apparatus comprising: the recording medium conveyance device according to any one of claims 1 to 32; and a post-processing unit that performs post-processing of the recording medium after forming a recording image conveyed by the recording medium conveyance device. It is a medium post-processing device.

  According to the present invention, it is easy to prevent erroneous detection of the trailing edge of a recording medium to be transported, has excellent operability, and forms a high-quality image and performs post-processing, and an image including the recording medium transport apparatus A forming apparatus can be provided. Furthermore, a recording medium post-processing apparatus provided with the recording medium conveying apparatus can also be provided.

Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a basic configuration diagram in which a recording medium transport apparatus 10 according to an embodiment of the present invention includes a photosensor 30. FIG. 2 is a cross-sectional view taken along the line (NN) of the recording medium transport apparatus 10 in FIG. FIG. 3 is an enlarged view of the detection hole 2 and the detection slot 20 of the recording medium conveyance device 10 according to the embodiment of the present invention. FIG. 4 is an enlarged view of the movable detection hole 21 and the movable detection hole member 22 of the recording medium transport apparatus 10 according to the embodiment of the present invention. FIG. 5 is an enlarged view of the transmitted light path 6 and the transmitted light path long hole 60 of the recording medium transport apparatus 10 according to the embodiment of the present invention. FIG. 6 is an enlarged view of the movable transmission optical path 61 and the movable transmission optical path member 62 of the recording medium transport apparatus 10 according to the embodiment of the present invention.
1 to 6, a recording medium conveying apparatus 10 that conveys a recording medium while guiding it in the conveying direction guides 1 that guides and sends out the recording paper of the recording medium P that enters the recording medium in the conveying direction indicated by the arrow A in the figure. It has. Further, a detection hole 2 formed at a detection location for detecting the rear end of the recording medium P in the conveyance path of the recording medium P on the guide means 1 is provided. Further, the photosensors 30 of the detecting means 3 are arranged in a detection hole arrangement row in which a plurality of the detection holes 2 are arranged in the main scanning direction in the direction of the arrow B shown in the drawing, which is perpendicular to the conveyance direction in the direction of the arrow A in the drawing of the recording medium P. A mounting means 4 for mounting is provided. Furthermore, a detection hole selecting means 5 for selecting the detection hole 2 for detecting the rear end of the recording medium P from the detection hole arrangement row is provided.

The guide means 1 reliably guides the recording medium P in the conveyance direction in the direction of the arrow A shown in the figure, and reliably faces the guide plate 11 in the conveyance direction in the direction of the arrow A in the direction of the arrow A. An opposing guide plate 12 for guiding is provided.
The guide means 1 includes a registration roller pair 8 that performs registration correction by aligning the leading end of the recording medium P that is transported to the downstream side that guides and feeds the entering recording medium P in the transport direction indicated by the arrow A in the figure. ing.
Further, the guiding means 1 includes a punch unit 9 that performs a punching process on the recording medium P that is conveyed to the downstream side that guides and sends the entering recording medium P in the conveying direction indicated by the arrow A in the figure.
As shown in FIG. 3, the detection hole 2 is a main scan that goes straight in the conveyance direction of the recording medium P in the direction indicated by the arrow A in the conveyance path of the recording medium P on the guide plate 11 of the guide means 1. A detection slot 20 is provided to connect a plurality in the direction. If a plurality of detection holes 2 are connected to each other, the detection holes 2 can be easily processed and the cost can be reduced.
Further, as shown in FIG. 4, the detection hole 2 in the conveyance path of the recording medium P on the guide plate 11 in the conveyance path of the recording medium P in the illustrated arrow A direction is perpendicular to the illustrated arrow B direction in the main scanning direction. A movable detection hole 21 that moves is provided. The movable detection hole 21 is provided with a movable detection hole member 22 that is separate from the guide plate 11 and moves in the main scanning direction in the direction of the arrow B shown in the figure, which is orthogonal to the conveyance direction in the direction of the arrow A in the drawing. .
Therefore, even when the punch hole formed in the recording medium P is outside the expected range, the movable detection hole 21 of the detection hole 2 is changed to an arbitrary position, and the attachment position of the photosensor 30 of the detection means 3 is changed. Can be changed.

The detection hole 2, the detection long hole 20, and the movable detection hole 21 have a curvature on the upstream side in the conveyance direction in the direction of arrow A of the recording medium P in the conveyance path of the recording medium P on the guide means 1. It has a larger hole shape. The detection hole 2, the detection long hole 20, and the movable detection hole 21 in the conveyance path of the recording medium P are not obstructed by the recording medium P to be conveyed by making the upstream curvature larger than the downstream curvature. Also, the occurrence of defects such as jams is prevented.
The opposing guide plate 12 of the guide means 1 is provided with a plurality of transmitted light paths 6 facing the reflective photosensor 30 so that reflected light is not generated when the recording medium P is not present in the reflective photosensor 30 portion. It has become. As shown in FIG. 5, there are a plurality of transmission light paths 6 in the main scanning direction in which the transmission light path 6 is orthogonal to the conveyance direction in the direction of arrow A of the recording medium P in the conveyance path of the recording medium P on the opposing guide plate 12. A transmission light path long hole 60 is provided to connect the pieces. If a plurality of transmission optical paths 6 are formed as the transmission optical path long holes 60 connected to each other, the processing becomes easy and the cost can be reduced.
Further, the transmission light path 6 is moved in the main scanning direction in the direction of the arrow B shown in the figure, which is perpendicular to the direction of the arrow A shown in the drawing in the conveyance path of the recording medium P on the opposing guide plate 12 shown in FIG. A movable transmitted light path 61 is provided. The movable transmission optical path 61 is provided with a movable transmission optical path member 62 that is separate from the opposing guide plate 12 and moves in the main scanning direction in the direction of the arrow B shown in the figure, which is orthogonal to the conveyance direction in the direction of the arrow A shown in the figure. Yes.
Therefore, even when the location of the punch hole formed in the recording medium P is outside the expected range, the movable transmission optical path 61 of the transmission optical path 6 can be changed to an arbitrary location to change the attachment location of the detection means 3. I can do it.

The transmission optical path 6, the transmission optical path long hole 60, and the movable transmission optical path 61 are arranged such that the upstream curvature of the recording medium P in the conveyance direction in the direction of arrow A of the recording medium P is downstream in the conveyance path of the recording medium P on the guide means 1. It has a hole shape larger than the curvature. The transmission optical path 6, the transmission optical path long hole 60, and the movable transmission optical path 61 in the conveyance path of the recording medium P become obstacles to the recording medium P to be conveyed by making the curvature on the upstream side larger than the curvature on the downstream side. In addition, the occurrence of defects such as jams is also prevented.
The photosensor 30 of the detection means 3 as a registration sensor attached to the attachment means 4 includes a reflection type photo interrupter.
The detection hole selection means 5 has a plurality of movable attachments that movably attach the attachment position of the detection means 3 in the main scanning direction in the direction of the arrow B shown in the figure, which is orthogonal to the conveyance direction in the direction of the arrow A of the recording medium P on the attachment means 4. Attachment means 50 are provided.
The movable attachment means 50 is attached integrally with the attachment means 51 at a plurality of positions formed on the same main scanning direction axis in the direction of arrow B on the attachment means 4 and the detection means 3 engaged with the attachment part 51. An engaging portion 52 is provided.
Therefore, when the position of the detection hole 2 of the photosensor 30 and the position of the punch hole of the recording medium P are the same in the main scanning direction indicated by the arrow B in the figure, the punch is made before the trailing edge of the regular recording medium P comes. When the hole passes, it is erroneously detected that the rear end has come. In such a case, the photosensor 30 is rearranged in different positions provided on the plurality of mounting portions 51 formed on the same axis B in the main scanning direction in the direction of arrow B on the mounting means 4. 30 false detections can be avoided. A plurality of attachment portions 51 may be provided in advance in the stay of the attachment means 4, and a plurality of detection holes 2 of the guide plate 11 and a plurality of transmission light paths 6 of the opposing guide plate 12 may be provided at the same position.
In this configuration, a plurality of photosensors 30 are attached in advance. Thus, even if one of the photosensors 30 detects that the recording medium P is “absent” when the punch hole has passed, the other photosensor 30 has the recording medium P “present” because there is no punch hole. By making the detection timing of all the plurality of photosensors 30 to be a normal detection timing, it is possible to avoid erroneous detection of punch holes.
Further, when there are punch holes at the same positions as the detection holes 2 of all the photosensors 30 in the positions of the plurality of attachment portions 51 provided in the attachment means 4, the attachment portions 51 are attached so that the positions of the attachment portions 51 can be freely changed. Separate from means 4.
At this time, the detection hole 2 of the guide plate 11 and the transmission optical path 6 of the counter guide plate 12 described above follow the position of the mounting portion 51, the detection slot 20, the movable detection hole 21, the transmission optical path slot 60, and the movable transmission path. It can be changed by the optical path 61.

FIG. 7 is a basic configuration diagram in which the recording medium transport apparatus 10 according to the embodiment of the present invention includes a filler 31. FIG. 8 is a cross-sectional view taken along line (XX) of the recording medium transport apparatus 10 in FIG. FIG. 9 is an enlarged view of the submerged portion 7 and the submerged portion long hole 70 of the recording medium conveying apparatus 10 according to the embodiment of the present invention. FIG. 10 is an enlarged view of the movable submerged portion 71 and the movable submerged member 72 of the recording medium conveying apparatus 10 according to the embodiment of the present invention.
7 to 10, a recording medium transport apparatus 10 that guides and transports a recording medium in the transport direction includes a guide unit 1 that guides and feeds an entering recording medium P in the transport direction indicated by an arrow A in the drawing. Yes. Furthermore, a detection hole 2 is provided in a detection location for detecting the rear end of the recording medium P in the conveyance path of the recording medium P on the guide means 1. Further, the filler 31 of the detection means 3 is attached to a detection hole arrangement row in which a plurality of detection holes 2 are arranged in the main scanning direction in the direction of the arrow B shown in the drawing, which is perpendicular to the conveyance direction in the direction of the arrow A in the drawing of the recording medium P Attachment means 4 are provided. Furthermore, a detection hole selecting means 5 for selecting the detection hole 2 for detecting the rear end of the recording medium P from the detection hole arrangement row is provided.
The guide means 1 reliably guides the recording medium P in the conveyance direction in the direction of the arrow A shown in the figure, and reliably faces the guide plate 11 in the conveyance direction in the direction of the arrow A in the direction of the arrow A. An opposing guide plate 12 for guiding is provided.
The guide means 1 includes a registration roller pair 8 that performs registration correction by aligning the leading end of the recording medium P that is transported to the downstream side that guides and feeds the entering recording medium P in the transport direction indicated by the arrow A in the figure. ing.
Further, the guiding means 1 includes a punch unit 9 that performs a punching process on the recording medium P that is conveyed to the downstream side that guides and sends the entering recording medium P in the conveying direction indicated by the arrow A in the figure.

The detection hole 2 is in the main scanning direction in the direction of the arrow B shown in the figure, which passes the detection hole 2 in the conveyance direction in the direction of the arrow A of the recording medium P in the conveyance path of the recording medium P on the guide plate 11 of the guide means 1. Are provided with detection long holes 20 for connecting a plurality of them. If a plurality of detection holes 2 are connected to each other, the detection holes 2 can be easily processed and the cost can be reduced.
In addition, a movable detection hole 21 that moves in the main scanning direction in the direction of the arrow B shown in the drawing is perpendicular to the conveyance direction in the direction of the arrow A of the recording medium P in the conveyance path of the recording medium P on the guide plate 11. I have. The movable detection hole 21 is provided with a movable detection hole member 22 that is separate from the guide plate 11 and moves in the main scanning direction in the direction of the arrow B shown in the figure, which is orthogonal to the conveyance direction in the direction of the arrow A in the drawing. .
Accordingly, even when the punch hole formed in the recording medium P is out of the expected range, the movable detection hole 21 of the detection hole 2 is changed to an arbitrary location, and the attachment location of the filler 31 of the detection means 3 is changed. I can do it.
The detection hole 2, the detection long hole 20, and the movable detection hole 21 have a curvature on the upstream side in the conveyance direction in the direction of arrow A of the recording medium P in the conveyance path of the recording medium P on the guide means 1. It has a larger hole shape. The detection hole 2, the detection long hole 20, and the movable detection hole 21 in the conveyance path of the recording medium P are not obstructed by the recording medium P to be conveyed by making the upstream curvature larger than the downstream curvature. Also, the occurrence of defects such as jams is prevented.
The opposing guide plate 12 of the guide means 1 is provided with slits of a plurality of submerged portions 7 that face the filler 31 so that interference does not occur when there is no recording medium P in the filler 31 portion. As shown in FIG. 9, the submergence unit 7 includes a plurality of submergence units 7 in the main scanning direction that is perpendicular to the conveyance direction indicated by the arrow A of the recording medium P in the conveyance path of the recording medium P on the opposing guide plate 12. A submerged slot 70 is provided to connect the pieces. If a plurality of submerged portions 7 are connected to a plurality of submerged portion elongated holes 70, the processing is facilitated and the cost can be reduced.

Further, the submerged portion 7 is moved in the main scanning direction in the direction of the arrow B shown in FIG. 10, which is orthogonal to the direction of the arrow A in the direction shown in the figure, in the conveyance path of the recording medium P on the opposing guide plate 12 shown in FIG. A movable dive unit 71 is provided. The movable submergence unit 71 includes a movable submergence member 72 that is separate from the opposing guide plate 12 and moves in the main scanning direction in the direction of the arrow B shown in the drawing, which is perpendicular to the conveyance direction of the recording medium P in the direction of the arrow A shown in the drawing. .
Accordingly, even when the punch hole formed in the recording medium P is outside the expected range, the movable submerged portion 71 of the submerged portion 7 is changed to an arbitrary portion, and the attachment location of the filler 31 of the detecting means 3 is changed. I can do it.
The submerged portion 7, the submerged portion long hole 70, and the movable submerged portion 71 are arranged such that the upstream curvature in the transport direction of the recording medium P in the illustrated arrow A direction in the transport path of the recording medium P on the guide means 1 is the downstream curvature. It has a larger hole shape. The submergence part 7, the submergence part long hole 70, and the movable submergence part 71 in the conveyance path of the recording medium P are jammed without being an obstacle to the recording medium P to be conveyed because the upstream curvature is larger than the downstream curvature. The occurrence of problems such as these is also prevented.
The filler 31 of the detection means 3 attached to the attachment means 4 includes a filler claw 33 and a photo sensor 34 that is a transmission type photo interrupter.
The detection hole selecting means 5 includes a plurality of movable attachment means 50 for movably attaching the attachment position of the filler 31 in the main scanning direction of the arrow B shown in the figure on the attachment means 4.

The movable attachment means 50 is a plurality of attachment portions 51 formed on the attachment means 4 on the axis in the illustrated arrow B direction in the main scanning direction, and an attachment engagement integral with the photosensor 34 engaged with the attachment portion 51. A portion 52 is provided.
Therefore, when the position of the detection hole 2 of the filler 31 and the position of the punch hole of the recording medium P are the same in the main scanning direction indicated by the arrow B in the figure, the punch hole is formed before the trailing edge of the regular recording medium P arrives. When it passes, it will falsely detect that the rear end has come. In such a case, the filler 31 is rearranged by rearranging the filler 31 at different positions provided on the plurality of mounting portions 51 formed on the same scanning direction axis B in the main scanning direction on the mounting means 4. False detection can be avoided. A plurality of attachment portions 51 may be provided on the stay of the attachment means 4 in advance, and a plurality of the detection holes 2 of the guide plate 11 and the submerged portions 7 of the opposing guide plate 12 may be provided at the same position.
In this configuration, a plurality of fillers 31 are attached in advance. As a result, even if one filler 31 detects that the recording medium P is “absent” when the punch hole passes, the other filler 31 does not have the punch hole, and thus the recording medium P is “present”. By setting the time when detection of all the plurality of fillers 31 is performed as a normal detection timing, it is possible to avoid erroneous detection of punch holes.
Further, when there are punch holes at the same positions as all the fillers 31 in the plurality of attachment portions 51 provided in the attachment means 4, the attachment means 4 is separated from the attachment means 4 so that the positions of the attachment portions 51 can be freely changed. To.
At this time, the detection hole 2 of the guide plate 11 and the sinking portion 7 of the opposing guide plate 12 follow the position of the mounting portion 51, and the detection slot 20, the movable detection hole 21, the sinking portion slot 70, and the movable sinking portion. 71 can be changed.

FIG. 11 is a flowchart for explaining the operation of the detection means 3 of the recording medium transport apparatus 10 according to the embodiment of the present invention.
In FIG. 11, the control unit 32 of the detection means 3 of the recording medium transport apparatus 10 cancels the punch hole punching process by determining whether there is a punch hole on the transported recording medium P as follows (see FIG. 1). (See FIG. 7).
At the start, first, it is determined whether or not there is an instruction for punch hole drilling processing (step 1). If there is an instruction for punch hole punching processing, the photosensors 30 or fillers 31 of all of the plurality of detection means 3 attached to the attachment means 4 are detected “ON” within the specified time. It is determined whether it has been done (step 2). If all the photosensors 30 or fillers 31 are not “ON (ON)” of the trailing edge detection of the recording medium P within the specified time, it is determined that the recording medium P has the punch hole “present” (step 3). When there is a difference in detection timing of the photosensor 30 or the filler 31 and a difference in the sub-scanning direction of 3 mm or more occurs in order to make it outside the range of chattering and variation, the recording medium P is determined to have a punch hole “present”. Then, the punch hole punching process of the punch unit 9 is canceled (step 4), and the process ends at the end.
However, if all the photosensors 30 or fillers 31 are detected “ON” in (step 2) within the specified time, it is determined that the recording medium P has “no punch” (no punch hole) ( Step 5). Then, a punch hole punching process of the punch unit 9 is executed (step 6), and the process ends at the end.
Therefore, a punch unit 9 that is often used as an option for a post-processing system may be provided. When the recording medium P with punch holes is used, there is a case where an operation for erroneously executing a punch hole drilling processing command is performed. Even if an erroneous operation is performed in this manner, the detection means 3 has the above-described punch hole avoidance configuration so that an unnecessary duplicate punch hole punching operation is not performed, thereby avoiding an operation error of the user. I can do it.

FIG. 12 is a basic configuration diagram in which the recording medium conveyance device 10 according to the embodiment of the present invention includes a connecting filler 53. 13 is a cross-sectional view taken along line (YY) of the recording medium transport apparatus 10 in FIG. FIG. 14 is an enlarged perspective view of the connection filler 53 of the recording medium transport apparatus 10 according to the embodiment of the present invention.
12 to 14, a recording medium conveying apparatus 10 that conveys a recording medium while guiding the conveying medium in the conveying direction guides 1 that guides and sends out the recording paper of the recording medium P that enters the recording medium in the conveying direction indicated by an arrow A in the drawing. It has. Furthermore, a detection hole 2 is provided in a detection location for detecting the rear end of the recording medium P in the conveyance path of the recording medium P on the guide means 1. Further, the attachment means 4 for attaching the detection means 3 to the detection hole arrangement row in which a plurality of the detection holes 2 are arranged in the main scanning direction in the direction of the arrow B shown in the drawing, which is perpendicular to the conveyance direction in the direction of the arrow A in the drawing of the recording medium P. It has. Furthermore, a connecting filler 53 of the detection hole selecting means 5 for selecting the detection hole 2 for detecting the rear end of the recording medium P from the detection hole arrangement row is provided.
The guide means 1 reliably guides the recording medium P in the conveyance direction in the direction of the arrow A shown in the figure, and reliably faces the guide plate 11 in the conveyance direction in the direction of the arrow A in the direction of the arrow A. An opposing guide plate 12 for guiding is provided.
The guide means 1 includes a registration roller pair 8 that performs registration correction by aligning the leading end of the recording medium P that is transported to the downstream side that guides and feeds the entering recording medium P in the transport direction indicated by the arrow A in the figure. ing.
Further, the guiding means 1 includes a punch unit 9 that performs a punching process on the recording medium P that is conveyed to the downstream side that guides and sends the entering recording medium P in the conveying direction indicated by the arrow A in the figure.

When the filler 31 is attached to the attachment means 4 by the movable attachment means 50, a connecting filler 53 having a shape for connecting a plurality of fillers 31 for selecting the detection hole 2 for detecting the rear end of the recording medium P from the detection hole arrangement row is provided. Prepare.
The connection filler 53 includes a single photo-interrupter photosensor 54 that detects the movement of the connection filler 53. An attachment engagement portion 52 that engages with the attachment portion 51 of the movable attachment means 50 is provided integrally with the photosensor 54 of the detection means 3.
By doing so, even if the filler claw 33 of one filler 31 extends from the detection hole 2 to the punch hole, the filler claw 33 of the other filler 31 detects the recording medium P from the detection hole 2, so that false detection is performed. Can be prevented.
By providing the connection filler 53, the same effect can be obtained by providing a plurality of photosensors 34 and avoiding erroneous detection due to punch holes without providing a plurality of photosensors 34.
Therefore, the position of the filler claw 33 of the one filler 31 from the one detection hole 2 and the position of the punch hole formed in the recording medium P may be the same in the main scanning direction indicated by the arrow B in the drawing. In such a case, when the punch hole passes before the trailing edge of the regular recording medium P comes, it is erroneously detected that the trailing edge has come. However, since the filler claw 33 of the other filler 31 from the other detection hole 2 automatically selected by the connecting filler 53 detects the recording medium P, erroneous detection can be prevented.

Further, the positions of two filler claw 33 of one filler 31 from one detection hole 2 and the other filler 31 from the other detection hole 2 and two punch holes formed in the recording medium P are shown in the figure. The same may be the case in the main scanning direction of the arrow B direction.
Even in such a case, the connecting filler 53 is rearranged at different positions provided on the plurality of mounting portions 51 formed on the same axis B in the main scanning direction in the direction of arrow B on the mounting means 4. False detection can be avoided. A plurality of attachment portions 51 may be provided on the stay of the attachment means 4 in advance, and a plurality of the detection holes 2 of the guide plate 11 and the submerged portions 7 of the opposing guide plate 12 may be provided at the same position.
In this configuration, a plurality of connecting fillers 53 are attached in advance. As a result, even if one connected filler 53 detects that the recording medium P is “absent” when the punch hole has passed, the other connected filler 53 does not have the punch hole, and thus the recording medium P is “present”. By detecting the detection of all of the plurality of connected fillers 53 as a normal detection timing, erroneous detection of punch holes can be avoided.
Further, when there are punch holes at the same positions as all the connecting fillers 53 in the positions of the plurality of mounting portions 51 provided in the mounting means 4, separate from the mounting means 4 so that the positions of the mounting portions 51 can be freely changed. Make your body.
At this time, the detection hole 2 of the guide plate 11 and the sinking portion 7 of the opposing guide plate 12 follow the position of the connecting filler 53, and the detection slot 20, the movable detection hole 21, the sinking portion slot 70, the movable sinking portion. 71 can be changed.
Accordingly, it is possible to provide the recording medium transport apparatus 10 that can easily prevent erroneous detection of the rear end of the transported recording medium P, has excellent operability, and forms a high-quality image for post-processing.

FIG. 15 is a basic configuration diagram of the image forming apparatus 100 including the recording medium conveyance device 10 and the recording medium post-processing apparatus 200 according to the embodiment of the present invention.
In FIG. 15, an image forming apparatus 100 that forms a recorded image on a recording medium includes an image forming unit 101 that forms a recorded image on a recording sheet of a recording medium P that is conveyed. Furthermore, the recording medium conveyance apparatus 10 as described in any one of Claims 1 thru | or 32 which guides and conveys the recording medium P which forms a recording image in the image formation unit 101 in a conveyance direction is provided.
The image forming apparatus 100 performs a post-processing of the recording medium P after forming a recording image, and includes a recording medium post-processing apparatus 200 including the recording medium conveying apparatus 10 according to any one of claims 1 to 32 as a side portion. It is attached to.
A document image reading unit 102 is placed on the image forming unit 101. The image forming unit 101 is held on an upper portion of a recording medium feeding device 103 that feeds the recording medium P.
The image forming unit 101 is formed by transferring a high-quality, high-quality toner recording image onto a recording sheet of a recording medium P, which is excellent in convenience and versatility in an electrophotographic image forming process.

The light source 121 moves the document O placed on the document table 120 of the document image reading unit 102 in the direction of the arrow D shown in the figure. At this time, the document image surface of the document O is illuminated by the light source 121 and the document image is read optically. Read by system 122. A document image read by the reading optical system 122 is written on the drum-shaped photosensitive drum 110 by the writing unit 112 of the image forming unit 101.
The photosensitive drum 110 rotates clockwise in the direction of the arrow E shown in the drawing. At this time, the surface is uniformly charged by the charging device 111, and the original image is written on the charged surface by the writing unit 112. As a result, an electrostatic latent image is formed on the photosensitive drum 110, and this latent image is visualized as a toner image by the developing unit 113.
On the other hand, the recording medium P is conveyed from the recording medium feeding device 103 toward the photosensitive drum 110 by the recording medium conveying device 10, and the recorded image of the toner on the photosensitive drum 110 is transferred to the recording medium P by the transfer device 114. The
The recording medium P passes through the fixing unit 115, and the transferred toner recording image is fixed on the recording medium P. Then, the recording medium P is discharged out of the image forming apparatus 100. Alternatively, as shown in the drawing, it is carried into the recording medium transport apparatus 10 of the recording medium post-processing apparatus 200, and is subjected to predetermined post-processing and transport, and then discharged and stored.

The toner remaining on the photosensitive drum 110 is removed by the cleaning unit 116 and prepared for the next process.
Accordingly, it is possible to provide the image forming apparatus 100 including the recording medium transport apparatus 10 that easily prevents erroneous detection of the rear end of the transported recording medium P, has excellent operability, and forms a high-quality recorded image.
The recording medium post-processing device 200 includes the recording medium transport apparatus 10 according to any one of claims 1 to 32, which guides and transports a recording medium P that is carried in after forming a recording image in the transport direction. Yes. A post-processing unit 201 that performs post-processing of the recording medium P after forming the recording image conveyed by the recording medium conveying apparatus 10 is provided.
The recording medium post-processing device 200 is attached to a side portion of the image forming apparatus 100, and guides the recording medium P discharged from the image forming apparatus 100 into the recording medium transport apparatus 10 disposed in the entrance transport path 220. . The recording medium P guided and conveyed into the recording medium conveying apparatus 10 including the punch unit 9 is configured to be distributed by the branching claw 240 and the branching claw 241.
The sheet is distributed to the upper conveyance path 221 that passes through the inlet conveyance path 220 and leads to the upper tray 230. It is also distributed to the shift tray conveyance path 222 that leads to the shift tray 231. Further, it is also distributed to an alignment binding conveyance path 223 that leads to an alignment binding tray 232 that performs post-processing such as alignment of the bookbinding processing unit 210 and staple binding.

An end face stitching stapler 211 or a saddle stitching stapler 212 is arranged on the alignment binding tray 232 of the bookbinding processing unit 210. The recording medium bundle P subjected to alignment, stapling, and the like is distributed to the shift tray conveyance path 222 that leads to the shift tray 231 by the branch guide plate 242 and the movable guide 243 that are deflection means. Further, the sheet is distributed to the folding tray 233 of the bookbinding processing unit 210 that performs folding or the like. Then, the folding tray 233 performs post-folding processing with the folding plate 213 and the additional folding roller pair 214.
The recording medium bundle P subjected to the saddle stitching process and the half-folding process is transported to the cutting position of the cutting unit 215 by the recording medium transporting apparatus 10 that does not include the punch unit 9. Then, the additional folding roller pair 214 performs an additional folding process for the front folding part and a cutting process for the rear end part by the cutting means 215, and is guided to the lower tray 234 and discharged.
Further, a branching claw 244 is disposed in the alignment binding conveyance path 223 and is held in a state shown in the figure by a low-load spring (not shown). 245 and 246 are reversed. At least the conveyance roller pair 245 is reversely rotated to guide and stay the trailing end of the recording medium P to the recording medium accommodation unit 235. Then, the recording medium P is transported so as to overlap with the next transported recording medium P. By repeating this operation, two or more recording media P can be overlapped and conveyed.
Accordingly, it is also possible to provide a recording medium post-processing apparatus 200 including the recording medium conveying apparatus 10 that forms a high-quality image and performs post-processing by easily preventing erroneous detection of the rear end of the recording medium P to be conveyed and having excellent operability. I can do it.

1 is a basic configuration diagram in which a recording medium conveyance device according to an embodiment of the present invention includes a photosensor. Sectional drawing of the (NN) line | wire of the recording-medium conveying apparatus in FIG. FIG. 3 is an enlarged view of a detection hole and a detection slot of the recording medium conveyance device according to the embodiment of the present invention. FIG. 4 is an enlarged view of a movable detection hole and a movable detection hole member of the recording medium conveyance device according to the embodiment of the present invention. FIG. 3 is an enlarged view of a transmission optical path and a transmission optical path long hole of the recording medium conveyance device according to the embodiment of the present invention. FIG. 3 is an enlarged view of a movable transmission optical path and a movable transmission optical path member of the recording medium conveyance device according to the embodiment of the present invention. 1 is a basic configuration diagram in which a recording medium transport device according to an embodiment of the present invention includes a filler. Sectional drawing of the (XX) line | wire of the recording-medium conveying apparatus in FIG. FIG. 3 is an enlarged view of a submerged portion and a submerged portion long hole of the recording medium conveyance device according to the embodiment of the present invention. FIG. 3 is an enlarged view of a movable submerged portion and a movable submerged member of the recording medium conveyance device according to the embodiment of the present invention. 6 is a flowchart for explaining the operation of a detection unit of the recording medium conveyance device according to the embodiment of the invention. FIG. 3 is a basic configuration diagram in which a recording medium conveyance device according to an embodiment of the present invention includes a connection filler. Sectional drawing of the (YY) line | wire of the recording-medium conveying apparatus in FIG. FIG. 3 is an enlarged perspective view of a connection filler of the recording medium conveyance device according to the embodiment of the invention. 1 is a basic configuration diagram of an image forming apparatus and a recording medium post-processing apparatus including a recording medium conveyance device according to an embodiment of the present invention. 1 is a basic configuration diagram of a conventional image forming apparatus. The enlarged view of the conventional recording medium conveyance apparatus. The perspective view of the conventional recording medium conveyance apparatus. FIG. 18 is a cross-sectional view of the conventional recording medium conveyance device in FIG. 17 taken along line (ZZ).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide means, 2 Detection hole, 3 Detection means, 4 Attachment means, 5 Detection hole selection means, 6 Transmission optical path, 7 Submergence part, 8 Registration roller pair, 9 Punch unit, 10 Recording medium conveyance apparatus, 11 Guide plate, 12 Opposing guide plate, 20 detection elongated hole, 21 movable detection hole, 22 movable detection hole member, 30 photo sensor, 31 filler, 32 control means, 33 filler claw, 34 photo sensor, 50 movable attachment means, 51 attachment portion, 52 attachment Engagement part, 53 Link filler, 54 Photo sensor, 60 Transmission light path long hole, 61 Movable transmission light path, 62 Movable transmission light path member, 70 Submergence part long hole, 71 Movable subtraction part, 72 Movable subtraction member, 100 Image forming apparatus, 101 Image forming unit, 102 Document image reading unit, 103 Recording medium Feeder, 110 Photosensitive drum, 111 Charging device, 112 Writing unit, 113 Developing unit, 114 Transfer device, 115 Fixing unit, 116 Cleaning unit, 120 Document table, 121 Light source, 122 Reading optical system, 200 Recording medium post-processing 201, post-processing unit, 202 conveying path, 210 bookbinding processing unit, 211 end-bound stitching stapler, 212 saddle stitching stapler, 213 folding plate, 214 additional folding roller pair, 215 cutting means, 220 inlet conveying path, 221 upper conveying path, 222 Shift tray conveyance path, 223 Alignment binding conveyance path, 230 Upper tray, 231 Shift tray, 232 Alignment binding tray, 233 Folding tray, 234 Lower tray, 235 Recording medium container, 240, 241 Separation claw, 242 Branch guide Plate, 243 Movable guide, 244 Branch claw, 245, 246 Conveying roller pair, 1000 Recording medium conveying device, 1001 Registration sensor, 1002 Registration roller pair, 1003 Guide means, 1004 Registration stay, 1005 Sensor optical path hole, 1020 Registration roller, 1021 Opposing roller, 1030 guide plate, 1031 Opposing guide plate, 1100 image forming apparatus, 1101 paper feeding unit, 1102 image carrier, 1103 optical writing unit, 1104 developing unit, 1105 primary transfer unit, 1106 secondary transfer unit, 1107 fixing Unit, 1108 Paper discharge unit, 1109 Stack unit

Claims (35)

  In a recording medium conveying apparatus that guides and conveys a recording medium in a conveying direction, guiding means that guides and sends out an entering recording medium in the conveying direction, and a trailing end of the recording medium in a conveying path of the recording medium on the guiding means A detection hole formed at a detection location for detecting the detection hole, an attachment means for attaching the detection means to a detection hole arrangement row in which a plurality of the detection holes are arranged in the main scanning direction perpendicular to the conveyance direction of the recording medium, And a detection hole selecting means for selecting the detection hole for detecting an end from the detection hole arrangement row.   2. The recording medium transport apparatus according to claim 1, wherein the guide means includes a guide plate that guides the recording medium in the transport direction, and an opposing guide plate that guides the recording medium in the transport direction so as to face the guide plate. A recording medium conveying apparatus characterized by the above.   3. The recording medium conveying apparatus according to claim 1, wherein a plurality of the detection holes are provided in a main scanning direction perpendicular to the recording medium conveyance direction in the recording medium conveyance path on the guide means. A recording medium transporting device, comprising a detection long hole connected to the recording medium.   3. The recording medium conveyance device according to claim 1, wherein the detection hole is movable in a main scanning direction perpendicular to the conveyance direction of the recording medium in the conveyance path of the recording medium on the guide means. A recording medium conveying apparatus comprising a detection hole.   5. The recording medium conveyance device according to claim 4, wherein the movable detection hole includes a movable detection hole member that is separate from the guide plate and moves in a main scanning direction orthogonal to the recording medium conveyance direction. Recording medium transport device.   6. The recording medium conveyance device according to claim 1, wherein the detection hole, the detection elongated hole, or the movable detection hole is formed in a conveyance path of the recording medium on the guide unit. A recording medium conveying apparatus comprising a hole shape having an upstream curvature in a conveying direction larger than a downstream curvature.   The recording medium conveyance apparatus according to claim 1, wherein the detection unit includes a photosensor.   8. The recording medium transport apparatus according to claim 7, wherein the guide unit includes a plurality of transmitted light paths facing the photosensor.   9. The recording medium transport apparatus according to claim 8, wherein a plurality of the transmitted light paths are connected in a main scanning direction perpendicular to the transport direction of the recording medium within the transport path of the recording medium on the guide means. A recording medium conveying apparatus comprising a transmission optical path long hole.   10. The recording medium transport apparatus according to claim 8, wherein the transmitted light path is movable in a main scanning direction perpendicular to the transport direction of the recording medium in the transport path of the recording medium on the guide means. A recording medium conveying apparatus comprising a transmission optical path.   11. The recording medium conveyance device according to claim 10, wherein the movable transmission optical path includes a movable transmission optical path member that is separate from the opposing guide plate and moves in a main scanning direction orthogonal to the recording medium conveyance direction. Recording medium transporting apparatus.   12. The recording medium conveyance device according to claim 8, wherein the transmission optical path, the transmission optical path long hole, or the movable transmission optical path is in a recording medium conveyance path on the guide unit. A recording medium conveying apparatus comprising a hole shape having an upstream curvature larger than a downstream curvature in the conveying direction.   The recording medium conveyance apparatus according to claim 1, wherein the detection unit includes a filler.   14. The recording medium transport apparatus according to claim 13, wherein the guide means includes a plurality of submergence portions facing the filler.   15. The recording medium conveyance device according to claim 14, wherein a plurality of the subsidence units are connected in a main scanning direction perpendicular to the recording medium conveyance direction in the recording medium conveyance path on the guide means. A recording medium transporting device comprising a submerged portion long hole.   16. The recording medium conveyance device according to claim 14, wherein the submergence unit is movable so as to move in the main scanning direction perpendicular to the conveyance direction of the recording medium in the conveyance path of the recording medium on the guide unit. A recording medium conveying apparatus comprising a submergence unit.   17. The recording medium conveyance device according to claim 16, wherein the movable submergence unit includes a movable submergence member that is separate from the opposing guide plate and moves in a main scanning direction orthogonal to the conveyance direction of the recording medium. Recording medium transport device.   18. The recording medium transport apparatus according to claim 14, wherein the submerged portion, the submerged portion long hole, or the movable submerged portion is in a transport direction of the recording medium in a transport path of the recording medium on the guide unit. A recording medium transporting apparatus comprising a hole shape having an upstream curvature larger than a downstream curvature.   The recording medium conveyance device according to claim 13, wherein the filler includes a photosensor.   20. The recording medium transport apparatus according to claim 1, wherein the attachment unit includes the detection unit.   21. The recording medium transport apparatus according to claim 1, wherein the detection hole selecting unit sets the mounting position of the detection unit on the mounting unit in a main scanning direction perpendicular to the transport direction of the recording medium. A recording medium conveying apparatus comprising a plurality of movable attachment means that are movably attached.   23. The recording medium conveying apparatus according to claim 21, wherein the movable attachment means includes an attachment portion formed on the attachment means and an attachment engagement portion integral with the detection means engaged with the attachment portion. A recording medium conveying apparatus.   23. The recording medium transport apparatus according to claim 20, 21, or 22, wherein the detection unit includes the photosensor.   24. The recording medium conveying apparatus according to claim 23, wherein the photosensor includes a plurality of photosensors.   23. The recording medium transport apparatus according to claim 20, 21 or 22, wherein the detection unit includes the filler.   26. The recording medium transport apparatus according to claim 25, wherein the filler includes a plurality of fillers.   27. The recording medium conveying apparatus according to claim 25 or 26, wherein the filler includes a photosensor that detects movement of the filler.   21. The recording medium transport apparatus according to claim 1, wherein the detection hole selecting unit includes a connecting filler that connects the plurality of fillers.   29. The recording medium transport apparatus according to claim 28, wherein the connecting filler includes a photosensor that detects movement of the connecting filler.   28. The recording medium transport apparatus according to claim 20, wherein the detection unit includes a control unit that cancels punch hole punching processing when a punch hole is present on the transported recording medium. A recording medium conveying apparatus.   31. The recording medium conveying apparatus according to claim 1, wherein the guide means aligns the leading end of the recording medium conveyed to the downstream side for guiding and feeding the recording medium entering the conveying direction. A recording medium conveying apparatus comprising a registration roller pair for performing correction.   32. The recording medium transport apparatus according to claim 1, wherein the guide unit performs punching processing on a recording medium transported to a downstream side that guides and feeds the entering recording medium in the transport direction. A recording medium conveying apparatus comprising a unit.   33. An image forming apparatus for forming a recorded image on a recording medium, wherein the image forming unit forms a recorded image on a conveyed recording medium, and the recording medium on which the recorded image is formed is conveyed by the image forming unit. An image forming apparatus comprising the recording medium carrying device according to claim 1.   34. The image forming apparatus according to claim 33, wherein the image forming unit forms a recorded image of toner by an electrophotographic image forming process.   33. A recording medium post-processing apparatus for performing post-processing of a recording medium after forming a recording image, wherein the recording medium carried in after forming the recording image is guided and conveyed in a conveying direction. And a post-processing unit that performs post-processing of the recording medium after forming a recording image transported by the recording-medium transport device.

Images