JP2006168837A - Sheet carrying device, image forming device, document image reading device, and recorded medium post-processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive sheet carrying device, capable of more effectively eliminating an attached matter attached to a sheet being carried, in simple constitution, and preventing generation of carrying defectives even in folded, thin, or less stiff sheet members, without deteriorating image quality or carrying quality of a formed or read image, or post-processing or the like for recorded medium for a long period, an image forming device, a document image reading device, and a recorded medium post-processing device. <P>SOLUTION: This device is provided with an opening 2 formed at an intermediate part of a sheet guide and carrying means 1 to guide and carry the sheet to be carried, a sheet carrying means 3 disposed on the upstream side and the downstream side of the opening part 2 to form a deformed part in the sheet being carried to carry it, a sheet detection means 4 to detect if the sheet to be carried by the sheet carrying means 3 exists or not, and an attached matter elimination mean 5 to eliminate attached matter X by putting the deformed part of the sheet being carried based on sheet detection information by the sheet detection means 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet conveying apparatus that guides and conveys a sheet material with a guide member, a printing apparatus equipped with the sheet conveying apparatus, an electrophotographic copying machine, a facsimile apparatus, a printer, or a complex machine thereof. The present invention relates to an image forming apparatus, a document image reading apparatus that reads a document image by guiding a document with a guide member, and a recording medium post-processing apparatus that performs post-processing of a sheet material of a recording medium after forming a recorded image.

The sheet conveying device, for example, conveys the sheet material to the image forming unit of the image forming apparatus while guiding the sheet material with the conveying guide, and transfers and fixes the toner recording image on the sheet material, and then carries it out of the image forming apparatus main body. And stock it on the tray.
However, in recent years, for the purpose of saving resources and reducing costs, the back side of used sheet materials and recycled sheets are often used. When image forming devices are used for a long time, sheet materials can be transported. Paper dust was generated on the way, and the paper dust was often deposited on the conveyance guide.
In particular, when the conveyance guide has a curved portion, the curved portion causes the sheet material to hit, bend, or rub against the conveyance guide. In particular, it was dropped and deposited on the aforementioned curved portion or the like.
As described above, when paper dust accumulates on the conveyance guide, the paper powder again adheres to the sheet material being conveyed, thereby reducing the coefficient of friction of the conveyance roller and causing the conveyance of the sheet material to be out of order. It was also.
Also, the accumulated paper dust adheres again to the sheet material being conveyed, for example, when it enters the image forming unit, it adheres to the photoreceptor of the image carrier, etc. When it cannot be completely removed by the cleaning device, for example, black or white streaks have occurred in the formed toner recording image or the like, or abnormal images such as white spots or black spots have occurred.
Therefore, in the paper sheet transport device in which the paper sheet transport path is formed by the roller pair and the guide plate pair, a plurality of paper powder dropping holes are formed in at least the lower guide plate of the guide plate pair, and the paper powder drops. It is publicly known to drop paper dust on the guide plate so as to avoid the inconvenience associated with paper dust by dropping from the use hole (see Patent Document 1).
However, paper dust that falls out of the hole for dropping paper dust during conveyance can be removed, but paper dust that has not adhered to the sheet material without being removed cannot be removed. In some cases, the inside of the image forming apparatus is contaminated, and the conveyance performance is deteriorated due to an increase in skew or slip rate. In the case of the image forming apparatus, the image forming apparatus adheres to the image carrier. In other words, when the image cannot be completely removed by the cleaning device, black or white streaks appear on the image, or abnormal images such as white spots or black spots occur.

Furthermore, in a sheet conveying apparatus that guides and conveys a sheet material with a lower conveying guide, an opening is provided in the lower conveying guide, and a brush-like member or a brush-like member whose rotation is controlled is provided downstream of the opening. It is possible to effectively wipe off the paper dust adhering to the sheet material with a simple and low-cost configuration by removing the paper dust adhering to the surface of the sheet material. The same applicant has also proposed a sheet conveying apparatus that can prevent image quality and conveying quality from deteriorating over a long period of time.
However, since the brush-like member protrudes in the sheet material conveyance path, the conveyance failure such as folding, twisting or non-feeding occurs when conveying thin or weak sheet material. In addition, a motor, a control board, a sheet detecting means, etc., for exclusive use of a rotational drive source for controlling the rotation of the brush-like member are required, resulting in high costs.
Therefore, in a conventional sheet conveying apparatus, and an image forming apparatus, a document image reading apparatus, and a recording medium post-processing apparatus including the sheet conveying apparatus, the paper that drops from the paper powder dropping hole during conveyance Although powder can be removed, paper dust that has not adhered to the sheet material cannot be removed, and it may fall and accumulate in subsequent transport paths, thereby contaminating the inside of the device. Therefore, a conveyance failure occurs due to an increase in skew and slip rate. In the image forming apparatus, if the adherence such as paper dust cannot be prevented from adhering to the photosensitive member of the image carrier, or if it cannot be removed by the cleaning device, black on the formed image or the read image. Abnormal images such as streaks and white streaks, white spots and black spots, misprocessing, or when thin or weakly sheet materials are conveyed, Inconveniences such as non-feeding have occurred, and a motor, a control board, a sheet detection means, etc., for exclusive use of a rotational drive source for controlling the rotation of the brush-like member are required, resulting in high costs.
JP-A-7-215523

  Therefore, an object of the present invention is to solve such problems. That is, with a simple configuration, more effectively removing adhered substances such as paper dust attached to the sheet to be conveyed, and the image quality of the image formed by the image forming apparatus and the read image, the conveyance quality, or A low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is bent or thin, or is weak, without lowering the post-processing of the recording medium over a long period of time, and the sheet conveying apparatus An image forming apparatus, a document image reading apparatus, and a recording medium post-processing apparatus.

In order to achieve the above object, the present invention described in claim 1 is a sheet conveying apparatus that guides and conveys a sheet material with a guide member. An opening formed in the middle of the sheet guide conveying means, a sheet conveying means for forming a deformed portion on the sheet to be conveyed while being arranged upstream and downstream of the opening, and conveyed by the sheet conveying means A sheet conveyance device comprising: a sheet detection unit that detects the presence or absence of a sheet to be removed; and a deposit removal unit that removes deposits by contacting a deformed portion of the sheet conveyed by the sheet detection information of the sheet detection unit. Is the most important feature.
Alternatively, according to a second aspect of the present invention, in the sheet conveying apparatus according to the first aspect, the sheet guide conveying means guides the upper side of the sheet to be conveyed and the lower side of the sheet to be conveyed. The main feature is that the sheet conveying apparatus includes a lower sheet guide.
Alternatively, the present invention described in claim 3 is characterized in that, in the sheet conveying apparatus according to claim 1 or 2, the sheet guide conveying means is a sheet conveying apparatus including a bent portion that forms an opening. Features.
Alternatively, according to a fourth aspect of the present invention, in the sheet conveying apparatus according to the first, second, or third aspect, the sheet guide conveying means includes a sheet upward guide portion that conveys the sheet passing through the opening in the upward direction. The main feature is that the sheet conveying apparatus is configured as follows.
Alternatively, according to a fifth aspect of the present invention, in the sheet conveying apparatus according to the first, second, third, or fourth aspect, the sheet guide conveying unit is removed from the sheet passing through the opening by the deposit removing unit. The main feature is that the sheet conveying apparatus is composed of an adhering matter guide unit for guiding the adhering matter that falls.

Alternatively, according to a sixth aspect of the present invention, in the sheet conveying apparatus according to the first, second, third, fourth, or fifth aspect, the opening includes an upper opening formed in the upper sheet guide and a lower sheet guide. The main feature is that the sheet conveying apparatus is composed of a lower opening formed in the above.
Alternatively, according to a seventh aspect of the present invention, in the sheet conveying apparatus according to the first, second, third, fourth, fifth or sixth aspect, the opening is provided in a direction orthogonal to the conveying direction of the conveyed sheet. The main feature is that the width of the opening is a sheet conveying apparatus larger than the maximum width of a sheet that can be conveyed.
Alternatively, in the present invention described in claim 8, in the sheet conveying apparatus according to claim 1, 2, 3, 4, 5, 6 or 7, the sheet conveying means is rotatably held upstream of the opening. An upstream sheet conveying roller that conveys the sheet to be conveyed and a downstream sheet conveying roller that conveys the sheet that is rotatably held downstream of the opening, and each rotation speed is variable. The main feature is that the sheet conveying device forms a deformed portion of the sheet conveyed in the opening.
Alternatively, according to a ninth aspect of the present invention, in the sheet conveying apparatus according to the first, second, third, fourth, fifth, sixth, seventh or eighth aspect, the sheet detecting means passes through the upstream sheet conveying roller. The main feature is that the sheet conveying device detects the leading edge of the sheet passing through the opening in the conveying direction of the downstream sheet conveying roller.
Alternatively, according to the tenth aspect of the present invention, in the sheet conveying apparatus according to the first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth aspect, the deposit removing means is close to the opening. The main feature is that the sheet conveying apparatus is composed of an elastic member arranged at a position away from the upper sheet guide or the lower sheet guide of the sheet guide conveying means.

Alternatively, the present invention described in claim 11 is the sheet conveying apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the width of the deposit removing means is the conveying The main feature is that the sheet conveying device is larger than the maximum possible sheet width.
Alternatively, according to a twelfth aspect of the present invention, in the sheet conveying apparatus according to any one of the first to eleventh aspects, the deposit removing means is an upper sheet guide or a lower sheet of the sheet guide conveying means. The main feature is that the sheet conveying device is held by a guide.
Alternatively, the present invention described in claim 13 is characterized in that, in the sheet conveying apparatus according to any one of claims 1 to 12, the deposit removing means is a sheet conveying apparatus made of a conductive material. Features.
Alternatively, according to a fourteenth aspect of the present invention, in the sheet conveying apparatus according to any one of the first to twelfth aspects, the deposit removing means is a sheet conveying apparatus that has been subjected to an antistatic treatment. Is the main feature.
Alternatively, the present invention according to claim 15 is characterized in that, in the sheet conveying apparatus according to any one of claims 1 to 12, the deposit removing means is a sheet conveying apparatus made of an antistatic material. Features.
Alternatively, according to a sixteenth aspect of the present invention, in the sheet conveying apparatus according to any one of the first to fifteenth aspects, the deposit removing means removes deposits that are removed from the sheet passing through the opening. It is a main feature that it is a sheet conveying device including a collected matter storage unit to be collected.
Alternatively, according to the present invention described in claim 17, in the sheet conveying apparatus according to claim 16, the adhering matter accommodation unit is configured to include an adhering matter container that accommodates and can be removed from the adhering matter to be collected. It is a main feature.

Alternatively, the present invention described in claim 18 is an image forming apparatus that forms a recorded image by guiding a sheet material of a recording medium with a guide member, and an image forming unit that forms a recorded image on a sheet of the recording medium. An image forming apparatus comprising the sheet conveying apparatus according to any one of claims 1 to 17, wherein a sheet of a recording medium on which a recording image is formed by the image forming unit is guided by a guide member and conveyed. This is the main feature.
Alternatively, in the image forming apparatus according to claim 18, the image forming unit forms a toner recording image on a sheet of a recording medium in an image forming process of an electrophotographic method. The main feature is that it is an image forming apparatus.
Alternatively, according to the present invention, in a document image reading apparatus that reads a document image by guiding a sheet material of a document with a guide member, a document placing unit that places a sheet of the document, and the document placing Original separation means for separating the sheets of the original bundle placed on the means one by one, and the original conveyed to the original image reading unit for reading the original image of the original sheet separated one by one by the original separation means 18. A sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus guides and conveys the sheet by a guide member, and an original image of an original sheet conveyed to the original image reading unit by the sheet conveying apparatus. The main feature is that it is a document image reading apparatus comprising a document image reading means for reading
Alternatively, the present invention according to claim 21 is a recording medium post-processing apparatus that performs post-processing of a sheet material of a recording medium after forming a recording image, and performs recording after forming the recording image. An inlet for introducing a sheet of the medium, a post-processing unit for performing post-processing on the sheet of the recording medium introduced from the inlet, and a recording medium for performing post-processing after forming a recorded image by the post-processing unit The main feature is that the recording medium post-processing apparatus comprises the sheet conveying apparatus according to any one of claims 1 to 17 that conveys a sheet guided by a guide member.

Since the present invention is configured as described below, according to the first aspect of the present invention, it is possible to more effectively remove deposits such as paper dust attached to a sheet to be conveyed with a simple configuration. It is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is removed, thin, or weak, without removing the conveyance quality over a long period of time. became.
According to the invention of claim 2, with a simple configuration, the deposits such as paper dust attached to the sheet to be conveyed are more effectively removed, and the sheet to be conveyed is reliably guided by guiding the upper and lower sides. To provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without degrading the conveyance quality over a long period by conveying the conveyance path. I can do it now.
According to the invention of claim 3, with a simple configuration in which the opening is easily formed, the deposits such as paper dust attached to the sheet to be conveyed are more effectively removed, and the conveyance quality is improved. It has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without being lowered over a long period of time.
According to the invention of claim 4, with a simple configuration, more effectively removing deposits such as paper dust attached to the sheet to be conveyed, without reducing the conveyance quality over a long period of time, It is possible to provide a low-cost sheet conveying apparatus that prevents a sheet from passing through an opening from being conveyed in an upward direction and preventing the occurrence of a conveyance failure even if the sheet passing through the sheet is bent or thin. Became.
According to the invention of claim 5, with a simple configuration, the adhering substance such as paper dust adhering to the sheet to be conveyed is guided to the adhering substance accommodating unit for removing and collecting more effectively, and the conveyance quality Thus, it is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak.

According to the invention of claim 6, with a simple configuration in which openings are formed on the upper and lower sides of the sheet to be conveyed, adhering substances such as paper dust attached to the sheet to be conveyed are more effectively removed, It has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without deteriorating the conveyance quality over a long period of time.
According to the invention of claim 7, with a simple configuration, adhering substances such as paper dust adhering to all sheets transporting the opening are more effectively removed, and the transport quality is extended over a long period of time. It is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of conveyance failure even with a sheet material that is not bent, thin, or weak.
According to the invention of claim 8, with a simple configuration that forms a deformed portion of the sheet to be transported in the opening, more effectively removing deposits such as paper dust attached to the sheet to be transported, It has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without deteriorating the conveyance quality over a long period of time.
According to the ninth aspect of the invention, with a simple configuration, the adhering material such as paper dust attached to the conveyed sheet is more effectively removed at the timing when the leading edge of the sheet reaches the downstream sheet conveying roller. In addition, it has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with sheet materials that are folded, thin, or weak, without deteriorating the conveyance quality over a long period of time. .
According to the invention of claim 10, with a simple configuration, the adhering matter such as paper dust adhering to the sheet to be conveyed is actively scraped and removed more effectively, and the conveyance quality is improved over a long period of time. Accordingly, it is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of conveyance failure even with a sheet material that is bent, thin, or weak.
According to the invention of claim 11, with a simple configuration, the deposits such as paper dust adhering to all the sheets transporting the deposit removing means are more effectively removed, and the transport quality is increased for a long time. It has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of conveyance failure even with a sheet material that is bent, thin, or weak.

According to the twelfth aspect of the present invention, it is possible to more effectively remove deposits such as paper dust adhering to the sheet to be conveyed, and to reduce the conveyance quality over a long period of time with a simple configuration that is also used. In addition, it is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of conveyance failure even with a sheet material that is bent, thin, or weak.
According to the thirteenth aspect of the invention, it is possible to more reliably and effectively remove the adhering matter such as paper dust attached to the sheet to be conveyed by eliminating static electricity on the surface of the sheet to be conveyed, with a simple structure that also serves as a dual purpose. In addition, it is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without deteriorating the conveyance quality over a long period of time. It became so.
According to the fourteenth aspect of the present invention, the adhering matter such as paper dust adhering to the sheet to be conveyed is treated with an antistatic treatment by the elastic member of the adhering matter removing means, and the adhering matter removing performance is improved. A low-cost sheet conveying device that prevents the occurrence of poor conveyance even with a sheet material that is folded, thin, or weak, without lowering the conveyance quality over a long period of time while holding and removing it more effectively Can now be offered.
According to the fifteenth aspect of the present invention, the adhering material such as paper dust adhering to the sheet to be conveyed is kept in a simple configuration, while the elastic member of the adhering material removing means maintains the adhering material removing performance by the antistatic material. To provide a low-cost sheet conveying apparatus that removes more effectively and prevents the occurrence of poor conveyance even with a sheet material that is bent, thin, or weak, without deteriorating the conveyance quality over a long period of time. Can now.
According to the sixteenth aspect of the present invention, with a simple configuration, deposits such as paper dust attached to the conveyed sheet are more effectively removed and scattered in the apparatus to prevent contamination in the apparatus. In addition, it has become possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with sheet materials that are folded, thin, or weak, without deteriorating the conveyance quality over a long period of time. .

According to the invention of claim 17, with a simple configuration, the deposits such as paper dust adhering to the conveyed sheet are more effectively removed and scattered in the apparatus to prevent contamination in the apparatus. In addition, it is possible to provide a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with a sheet material that is bent, thin, or weak, without further degrading the conveyance quality over a long period of time. It became so.
According to the eighteenth aspect of the present invention, the adhering material such as paper dust attached to the sheet of the recording medium to be conveyed is more effectively removed with a simple configuration, and the image quality and the conveyance quality of the formed image are also reduced. To provide an image forming apparatus including a sheet conveying apparatus that forms an image at a low cost, which prevents the occurrence of poor conveyance even with a sheet material that is bent, thin, or weak, without reducing the image quality over a long period of time. Can now.
According to the nineteenth aspect of the present invention, the adhering material such as paper dust attached to the sheet of the recording medium to be conveyed is more effectively removed with a simple configuration, and the formed image of the toner recording image is removed. Sheet transport that forms high-quality formed images at low cost, preventing the occurrence of poor transport even with sheet materials that are folded, thin, or weak, without degrading image quality and transport quality over a long period of time An image forming apparatus provided with the apparatus can be provided.
According to the twentieth aspect of the present invention, the adhering material such as paper dust attached to the sheet of the document to be conveyed is more effectively removed with a simple configuration, and the image quality and the conveyance quality of the read image are improved for a long time. Thus, it is possible to provide a document image reading apparatus including a low-cost sheet conveying apparatus that prevents the occurrence of conveyance failure even with a sheet material that is folded, thin, or weak. It was.
According to the invention of claim 21, with a simple configuration, it is possible to more effectively remove deposits such as paper dust adhering to the sheet of the recording medium to be transported, and to transport quality and the recording medium to be transported. Recording medium post-processing apparatus equipped with a low-cost sheet conveying apparatus that prevents the occurrence of poor conveyance even with sheet materials that are folded, thin, or weak, without lowering the post-processing of the sheet for a long period of time Can now be provided.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 are front views of the main part of the sheet conveying apparatus of the present invention, and FIG. 3 is a perspective view of the main part. In each figure, a sheet conveying apparatus 0 for guiding and conveying a sheet material with a guide member is formed between the sheet guide conveying means 1 for guiding and conveying the sheet (P) to be conveyed, and the sheet guide conveying means 1. The opening 2, the sheet conveying means 3 that forms and deforms the sheet (P) that is arranged and conveyed on the upstream side and the downstream side of the opening 2, and the sheet (P) that is conveyed by the sheet conveying means 3 ) From the sheet detection means 4 for detecting the presence / absence of the sheet) and the deposit removal means 5 for removing the deposit (X) by contacting the deformed portion of the sheet (P) conveyed by the sheet detection information of the sheet detection means 4. It is a simple structure, and more effectively removes deposits (X) such as paper dust adhering to the sheet (P) to be conveyed, and is thin without deteriorating the conveyance quality over a long period of time. Or even a sheet with weak waist (P) To prevent the occurrence of a good is a low cost.
The sheet guide conveying means 1 includes a plate-like upper sheet guide 1a for guiding the upper side of the sheet (P) to be conveyed and a plate-like lower sheet guide 1b for guiding the lower side of the sheet (P) to be conveyed. The upper and lower sides of the sheet (P) to be conveyed are guided to reliably convey the conveying path.
The upper sheet guide 1a and the lower sheet guide 1b have an opening 2 that is open in a direction orthogonal to the conveying direction (A) of the sheet (P).
The opening 2 includes an upper opening 2a formed by a bent portion 1c obtained by forming a cut at an appropriate position of the upper sheet guide 1a and then bending both sides of the cut upward, and a guide portion on the lower sheet guide 1b facing the seat. 1d and a lower opening 2b formed by the adhering matter guide 1e, a deformed portion of the sheet to be conveyed is formed on the upper and lower sides of the sheet to be conveyed, and the sheet passing through the opening 2 is conveyed in the upward direction. In addition to preventing the occurrence of conveyance failure such as folding of the sheet passing through, the guided material is guided to the adhering material container for collecting the adhering material (X) that is removed by the adhering material removing means 5 from the sheet passing through the opening 2 and falls. Thus, the sheet is conveyed to the conveyance path.

Sheets that are rotatably held upstream of the sheet conveying means 3 on the upstream side and the downstream side in the conveying direction (A) of the sheet (P) of the upper opening 2a and the lower opening 2b of the opening 2 A pair of upstream sheet conveying rollers 3a that convey the sheet and a pair of downstream sheet conveying rollers 3b that convey the sheet that is rotatably held and conveyed on the downstream side are provided. A deformed portion of the sheet to be conveyed is formed in the opening 2.
A sheet detecting means 4 is disposed between the roller pair of the upstream side sheet conveying roller 3a and the roller pair of the downstream side sheet conveying roller 3b, and passes through the roller pair of the upstream side sheet conveying roller 3a to downstream the opening 2. The leading edge of the sheet passing in the conveying direction (A) of the roller pair of the side sheet conveying roller 3b is detected.
The roller pair of the upstream side sheet conveying roller 3a and the roller pair of the downstream side sheet conveying roller 3b are provided with a rotational driving force coupling means (not shown) that can independently connect and release the driving.
The adhering matter removing means 5 is an elastic member 5a (plate) disposed at a position close to the upper opening 2a or the lower opening 2b and away from the upper sheet guide 1a or the lower sheet guide 1b. It is made of a spring-like elastic sheet or the like, and more effectively removes the adhering matter (X) such as paper dust attached to the sheet conveyed with a simple configuration.
Since the elastic member 5a of the deposit removing means 5 is held by the upper sheet guide 1a or the lower sheet guide 1b, it has a simple configuration that is also used, and is low in cost.

The sheet to be conveyed is conveyed in the conveying direction (A) by the pair of rollers of the upstream sheet conveying roller 3a, the leading edge of the sheet is detected by the sheet detecting means 4, and based on the sheet detection information, the leading edge of the sheet is the downstream sheet. The rotation of the downstream side sheet conveying roller 3b is momentarily stopped at the timing when it reaches the conveying roller 3b. Detection information of the sheet detection unit 4 is input to a control unit (not shown), and the control unit controls driving of each conveyance roller based on this information.
At this time, the sheet is slackened in the upward direction indicated by the arrow (B) between the upstream sheet conveying roller 3a and the downstream sheet conveying roller 3b to form a deformed portion as shown in the figure. The deformed portion is in contact with the elastic member 5a (see FIG. 2).
Then, the upstream sheet conveyance roller 3a and the downstream sheet conveyance roller 3b are rotated at the same speed, and the sheet conveyance is continued while maintaining the state where the deformed portion of the sheet is in contact with the elastic member 5a.
Thereby, the elastic member 5a of the adhering matter removing means 5 actively scrapes off the adhering matter (X) such as paper dust adhering to the surface of the sheet and more effectively removes it.
Accordingly, the opening 2 is provided in the sheet guide conveying unit 1, and the upstream sheet conveying roller 3 a and the downstream sheet conveying roller located on the upstream side and the downstream side of the opening 2 based on the sheet detection information of the sheet detecting unit 4. The rotational speed of 3b is variably adjusted, and the sheet conveyed in the conveying direction (A) is deformed by the deforming portion to adjust the distance between the sheet and the elastic member 5a. Without carrying out, since the sheet and the elastic member 5a are in contact with each other during conveyance, the adhering matter (X) such as paper dust adhering to the sheet is actively scraped off and effectively removed and removed. For any sheet, for example, a sheet with low stiffness, a sheet with curl wrinkles, or the like, it is possible to prevent deterioration in conveyance quality and the like over a long period of time at low cost without causing poor conveyance.

The opening 2 is provided in a direction orthogonal to the conveyance direction (A) of the sheet to be conveyed (upper and lower surfaces of the sheet), and the width (La) of the opening 2 is larger than the maximum width (Lp) of the sheet that can be conveyed. It has become larger (see FIG. 3).
Similarly, the width (Lb) of the elastic member 5a is also larger than the maximum width (Lp) of the transportable sheet (see FIG. 3).
Accordingly, the opening 2 provided in the sheet guide conveying means 1 is provided in a direction orthogonal to the conveying direction (A) of the sheet to be conveyed, and at the width (La) of the opening 2 and a position close to the opening 2. Since the width (Lb) of the elastic member 5a at a position away from the sheet guide conveying means 1 is larger than the maximum width (Lp) of the sheet that can be conveyed, the conveying path of the sheet guide conveying means 1 is For all the conveyed sheets, it is possible to remove and remove the dust (X) adhering to the sheet more reliably and effectively, at a low cost and for a long period of time. In addition, it is possible to provide the sheet conveying apparatus 0 that further effectively prevents a decrease in conveying performance.
The elastic member 5a at a position close to the opening 2 provided in the sheet guide conveying means 1 and at a position separated from the sheet guide conveying means 1 is made of a conductive material and is electrically connected to the ground of the apparatus main body (not shown). Has been.
Therefore, by removing the static electricity generated on the sheet surface during conveyance in the conveyance direction (A) of the sheet to be conveyed, it is possible to maintain good conveyance performance and to adhere the paper dust on the sheet. Since the adhering matter (X) can be removed more reliably and effectively, it is a simple configuration that also serves two functions with one component. Can now be offered.
The elastic member 5a located at a position close to the opening 2 provided in the sheet guide conveying means 1 and away from the sheet guide conveying means 1 is subjected to antistatic treatment or made of an antistatic material.
Accordingly, the elastic member 5a has an extraneous matter removal performance that more effectively removes extraneous matter (X) such as paper dust attached to the sheet conveyed in the conveying direction (A) for a long period of time. The sheet conveying device 0 to be held can be provided.

In FIG. 4, the elastic member 5 a collects the adhering matter (X) such as paper powder which is removed from the sheet passing through the opening 2 in the conveying direction (A) and falls, in the adhering matter accommodation unit 6. ing.
And the deposit | attachment accommodating part 6 consists of the deposit | attachment container 6a which accommodates deposits (X), such as paper powder which is removed and falls, and removes deposits (X), such as paper dust which is removed and dropped, efficiently In order to process well, the deposit container 6a is detachable so that it can be easily and easily pulled out from the apparatus main body so as to be easily cleaned.
Accordingly, since the adhering matter container 6 and the adhering matter container 6a for collecting the adhering matter (X) such as paper dust that is scattered are provided in the vicinity of the elastic member 5a, the elastic member 5a and the deforming portion of the sheet are provided. Adherents (X) such as paper dust scraped from the sheet conveyed in the conveying direction (A) in contact with the sheet are scattered in the apparatus to prevent contamination in the apparatus, and the conveyance performance over a long period of time. It is now possible to provide a sheet conveying apparatus 0 that further effectively prevents the decrease in the above.
5 and 6, an image forming apparatus 10 that forms a recorded image by guiding a sheet material of a recording medium with a guide member includes an image forming unit 11 that forms a recorded image on a sheet of the recording medium, and image formation. The sheet conveying device 0 according to any one of claims 1 to 17, which conveys a sheet of a recording medium on which a recording image is to be formed by a guide member by a guide member, and conveys the sheet with a simple configuration. Paper dust and other deposits (X) adhering to the recording medium sheet are more effectively removed, and the image quality of the formed image or the conveyance quality is not degraded over a long period of time. Even if the sheet is thin, thin or weak, the occurrence of conveyance failure is prevented and the cost is low.
The image forming unit 11 forms a high-quality toner recording image on a sheet of a recording medium at high speed by an image forming process such as charging, writing, developing, transferring, and cleaning in an electrophotographic method.
In the copying machine of the image forming apparatus 10, a document image reading device 20 that reads a document image of a document sheet is disposed above the image forming unit 11.
On the other hand, a recording medium supply device 12 for placing the image forming section 11 and supplying a recording sheet of a recording medium sheet is disposed below the image forming section 11.
On the other hand, on the right side of the image forming unit 11, a mass recording medium supply device 13 that supplies a large amount of recording sheets of recording medium sheets to the image forming unit 11 is arranged.
Further, on the left side of the image forming unit 11, a recording medium post-processing device 30 that performs post-processing of the recording sheet of the recording medium sheet on which the toner recording image is formed by the image forming unit 11 is disposed.

In the image forming unit 11, charging is performed by causing a laser diode of the image writing unit 11 c to emit light by an electrophotographic method for forming a recorded image of toner with image data of a document image of a document sheet read by the document image reading device 20. An electrostatic latent image is formed on the drum-shaped photosensitive drum of the image carrier 11a uniformly charged by the device 11b.
The electrostatic latent image formed by causing the laser diode of the image writing means 11c to emit light is visualized by the developing device 11d to form a recorded image of toner.
The toner recording image visualized by the developing device 51d is transferred from the recording medium supply device 12 or the mass recording medium supply device 13 to the sheet according to any one of claims 1 to 17 by the transfer device 11e. It is transferred and recorded on a recording sheet of a recording medium sheet conveyed from the conveying device 0.
In the sheet conveying apparatus 0 that guides and conveys recording sheets of recording medium sheets fed from the mass recording medium supply apparatus 13 to the registration rollers 11f, the upper sheet guide 1a of the sheet guide conveying means 1 is used. And the lower sheet guide 1b form a conveyance path.
The upper sheet guide 1a and the lower sheet guide 1b of the sheet guide conveying unit 1 are arranged to face each other in the image forming unit 11, and support both sides with a side plate (not shown).
The recorded image of the toner transferred and recorded on the recording sheet of the recording medium sheet by the transfer device 11e is heated and pressed by the fixing device 11g, and the recording sheet of the recording medium sheet is then discharged by the discharge roller 11h. It is carried into the inlet 31 of the post-recording device post-processing device 30 and predetermined post-processing is performed.
On the other hand, the drum-shaped photosensitive drum of the image carrier 11a adheres onto the drum-shaped photosensitive drum of the image carrier 11a after transferring and recording the toner recording image on the recording paper of the sheet of the recording medium. The residual toner is scraped off and cleaned by the cleaning member 11i to prepare for the next image formation.
Therefore, the adhering material (X) such as paper dust adhering to the recording paper of the sheet of the recording medium to be conveyed can be more effectively removed and the formed image of the toner recording image can be obtained with a simple configuration. Sheet conveying device that forms high-quality formed images at low cost and prevents the occurrence of poor conveyance even with sheet materials that are folded, thin, or weak, without degrading quality and conveyance quality over a long period of time The image forming apparatus 10 having 0 can be provided.

In FIG. 7, a document image reading apparatus 20 that reads a document image by guiding a sheet material of a document with a guide member is placed on a document placing unit 21 that places a sheet of the document, and the document placing unit 21. A document separating unit 22 that separates the sheets of the document bundle one by one and a document sheet conveyed to the document image reading unit 23 that reads the document image of the document sheet separated one by one by the document separating unit 22 are guided. 18. A sheet conveying apparatus according to claim 1, which is guided and conveyed by a member, and an original image for reading an original image on a sheet of an original conveyed to the original image reading unit by the sheet conveying apparatus. It consists of a reading means 24, and with a simple configuration, removes the adhering matter (X) such as paper dust adhering to the sheet of the document to be conveyed more effectively, and improves the image quality and conveyance quality of the read image. Decrease over time It without crease or the like and a thin, or a low cost by preventing the occurrence of conveyance failure in hip weak sheet.
The document image reading unit 24 includes a light source 24a, a mirror 24b, a mirror 24c, a mirror 24d, an imaging lens 24e, an image sensor 24f such as a CCD, and the like.
A contact glass 23 a is disposed on the document image reading unit 23 on the upper surface.
On the other hand, the original setting table of the original placing unit 21 for setting the original sheet to be conveyed from above and the conveyed original sheet set on the original setting unit of the original placing unit 21 are separated and fed out one by one. A sheet conveying device 0 that reverses the sheet of the document conveyed by the sheet feeding separation roller of the document separating unit 22 and the sheet feeding separation roller of the document separating unit 22 and conveys the sheet to the contact glass 23a of the document image reading unit 23. It consists of.
In the sheet conveying apparatus 0 that reverses the sheet of the document to be conveyed that is fed by the sheet feeding separation roller of the document separating unit 22, guides it to the contact glass 23 a of the document image reading unit 23, and guides and conveys the sheet, the sheet guide conveying unit One upper sheet guide 1a and lower sheet guide 1b form a conveyance path.
The upper sheet guide 1a and the lower sheet guide 1b of the sheet guide conveying means 1 are arranged to face the contact glass 23a of the document image reading unit 23, and support both sides with a side plate (not shown).
Therefore, with a simple configuration, the adhering material (X) such as paper dust adhered to the sheet of the document to be conveyed is more effectively removed, and the image quality and the conveyance quality of the read image are deteriorated over a long period of time. Accordingly, it is possible to provide the document image reading apparatus 20 including the low-cost sheet conveying apparatus 0 that prevents the occurrence of conveyance failure even with a sheet material that is bent, thin, or weak.

In FIG. 8, a recording medium post-processing device 30 that performs post-processing of a sheet material of a recording medium after forming a recording image introduces a sheet of the recording medium to be transported that performs post-processing after forming the recording image. A post-processing unit 32 that performs post-processing on a sheet of a recording medium to be transported introduced from the introducing port 31, and a recording medium that is transported to perform post-processing after a recording image is formed by the post-processing unit 32 A sheet adhering to a sheet of a recording medium to be conveyed with a simple configuration, comprising the sheet conveying apparatus 0 according to any one of claims 1 to 17, wherein the sheet is conveyed by being guided by a guide member. While removing deposits (X) such as powder more effectively and without lowering the transport quality and post-processing of the sheet of recording medium to be transported over a long period of time, it can be folded or thin, or Insufficient conveyance even with weak sheet materials A to prevent a low cost.
The sheet of the recording medium to be conveyed introduced from the introduction port 31 is conveyed from the punching device 32a of the post-processing means 32 to the sheet conveying device 0, and then arranged in the post-processing conveyance path 33 and the post-processing conveyance path 33. Even when the post-processing is carried out by the rollers, the branching claws or the like to the stapling device 32b or the intermediate tray 32c of the post-processing means 32, or when the post-processing is not performed, the fixed tray 34 or the moving The tray 35 is discharged and stored.
In the sheet conveying apparatus 0 that guides and conveys the sheet of the recording medium to be conveyed that is fed out from the punching device 32a of the post-processing means 32 to the post-processing conveying path 33, the upper sheet guide 1a of the sheet guide conveying means 1 is guided. And the lower sheet guide 1b form the conveyance path.
The upper sheet guide 1a and the lower sheet guide 1b of the sheet guide conveying unit 1 are arranged to face the post-processing conveyance path 33, and support both sides with a side plate (not shown).
Therefore, with a simple configuration, the deposits (X) such as paper dust adhering to the sheet of the recording medium to be conveyed are removed more effectively, and the conveyance quality and the sheet of the recording medium to be conveyed are removed. Provided is a recording medium post-processing device 30 provided with a low-cost sheet conveying device 0 that prevents the occurrence of conveyance failure even with a sheet material that is bent, thin, or weak, without reducing the processing over a long period of time. I was able to do that.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram illustrating a sheet conveying device according to an embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating a state of a main part of a sheet conveying apparatus showing an embodiment of the present invention. 1 is a perspective view for explaining an outline of a sheet conveying apparatus showing an embodiment of the present invention. FIG. 5 is an explanatory diagram for explaining another main part of the sheet conveying apparatus showing an embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating an image forming apparatus including a sheet conveying device according to an embodiment of the present invention. FIG. 3 is an enlarged view for explaining a main part of an image forming apparatus including a sheet conveying device according to an embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating a document image reading apparatus including a sheet conveying device according to an embodiment of the present invention. FIG. 3 is an explanatory diagram for explaining a recording medium post-processing device including a sheet conveying device according to an embodiment of the present invention.

Explanation of symbols

0 sheet conveying device 1 sheet guide conveying means,
1a Upper sheet guide,
1b Lower sheet guide,
1c bending part,
1d Guy part on the sheet,
1e Deposit guide part 2 Opening part,
2a upper opening,
2b Lower opening 3 Sheet conveying means,
3a Upstream sheet conveying roller,
3b Downstream sheet conveying roller 4 Sheet detecting means 5 Adhering substance removing means,
5a elastic member 6 adhering matter accommodating part,
6a deposit container 10 image forming apparatus 11 image forming unit,
11a image carrier,
11b charger,
11c image writing means,
11d Developer,
11e transfer device,
11f Registration roller,
11g fixing device,
11h Paper discharge roller,
11i Cleaning member 12 Recording medium supply apparatus 13 Mass recording medium supply apparatus 20 Document image reading apparatus 21 Document placing means 22 Document separating means 23 Document image reading section,
23a Contact glass 24 Document image reading means,
24a light source,
24b mirror,
24c mirror,
24d mirror,
24e imaging lens,
24f image sensor 30 to-be-recorded body post-processing apparatus 31 inlet 32 post-processing means,
32a drilling device,
32b Staple device,
32c Intermediate tray 33 Post-processing conveyance path 34 Fixed tray 35 Moving tray

Claims (21)

  A sheet guide conveying unit that guides and conveys the sheet, an opening formed in the middle of the sheet guide conveying unit, and an upstream portion and a downstream side of the opening portion, respectively, and the deformation portion is formed on the sheet and conveyed. Sheet conveying means, sheet detecting means for detecting the presence or absence of a sheet conveyed by the sheet conveying means, control means for controlling the respective sheet conveying means based on sheet detection information of the sheet detecting means, And a deposit removing means for removing the deposit by contacting the deformed portion of the sheet.   2. The sheet conveying apparatus according to claim 1, wherein the sheet guide conveying means includes an upper sheet guide for guiding an upper side of a sheet to be conveyed and a lower sheet guide for guiding a lower side of the sheet to be conveyed. A sheet conveying apparatus.   3. The sheet conveying apparatus according to claim 1, wherein the sheet guide conveying unit includes a bending portion that forms the opening. 4.   4. The sheet conveying apparatus according to claim 1, wherein the lower sheet guide includes a sheet upward guide portion that conveys a sheet passing through the opening in an upward direction. apparatus.   5. The sheet conveying apparatus according to claim 1, wherein the lower sheet guide portion guides the deposit that is removed by the deposit removing means from the sheet passing through the opening and falls. A sheet conveying apparatus comprising a section.   The sheet conveying apparatus according to claim 1, 2, 3, 4, or 5, wherein the opening includes an upper opening formed in the upper sheet guide and a lower opening formed in the lower sheet guide. A sheet conveying apparatus comprising:   7. The sheet conveying apparatus according to claim 1, wherein the opening is provided in a direction orthogonal to a sheet surface to be conveyed, and the width of the opening is a width of a sheet that can be conveyed. A sheet conveying apparatus characterized by being larger than the maximum width.   8. The sheet conveying apparatus according to claim 1, wherein the sheet conveying means is rotatably held upstream of the opening and conveys a sheet. A roller, and a downstream sheet conveyance roller that is rotatably held downstream of the opening and conveys the sheet, and forms a deformed portion of the sheet to be conveyed in the opening by making each rotation speed variable. A sheet conveying apparatus.   9. The sheet conveying apparatus according to claim 1, wherein the sheet detecting unit detects a leading edge of a sheet passing through the downstream sheet conveying roller. Sheet transport device.   10. The sheet conveying apparatus according to claim 1, wherein the deposit removing means is located at a position close to the opening, and the upper sheet guide or lower A sheet conveying apparatus comprising an elastic member disposed at a position distant from the side sheet guide.   11. The sheet conveying apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein a width of the deposit removing means is larger than a maximum width of a sheet that can be conveyed. A sheet conveying apparatus that is characterized.   12. A sheet conveying apparatus according to claim 1, wherein the deposit removing means is held by the upper sheet guide or the lower sheet guide.   The sheet conveying apparatus according to any one of claims 1 to 12, wherein the deposit removing means is made of a conductive material.   The sheet conveying apparatus according to any one of claims 1 to 12, wherein the deposit removing means is subjected to an antistatic process.   13. The sheet conveying apparatus according to claim 1, wherein the deposit removing means is made of an antistatic material.   16. The sheet conveying apparatus according to claim 1, further comprising an adhering matter storage unit that collects adhering matter that is removed from the sheet that passes through the lower opening. apparatus.   The sheet conveying apparatus according to claim 16, wherein the adhering matter container includes a detachable adhering matter container that accommodates the collected adhering matter.   In an image forming apparatus that forms a recorded image by guiding a sheet material of a recording medium with a guide member, an image forming unit that forms a recorded image on a sheet of the recording medium, and a target that forms a recorded image on the image forming unit. An image forming apparatus comprising: the sheet conveying apparatus according to claim 1, wherein the sheet of the recording medium is conveyed by being guided by a guide member.   The image forming apparatus according to claim 18, wherein the image forming unit forms a toner image on a sheet of a recording medium by an image forming process of an electrophotographic method.   Document placing means for placing a document, document separating means for separating a bundle of documents placed on the document placing means one by one, and original documents separated one by one by the document separating means The sheet conveying device according to any one of claims 1 to 17, wherein a document conveyed to a document image reading unit for reading an image is guided and conveyed by a guide member, and the document image reading unit is configured to be conveyed by the sheet conveying device. An original image reading device comprising original image reading means for reading an original image of a conveyed original. An inlet for introducing a sheet of a recording medium that has undergone recording image formation; a post-processing means for performing post-processing on the recording medium introduced from the inlet; and a post-processing means after forming a recorded image by the post-processing means A recording medium post-processing apparatus comprising the sheet conveying apparatus according to any one of claims 1 to 17, wherein the recording medium to be processed is conveyed by being guided by a guide member.

Images