JP2008174367A - Sheet material conveying device, image forming device, and automatic document feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material conveying device capable of smoothly collecting and eliminating foreign materials. <P>SOLUTION: This sheet material conveying device having a conveying means 21 for conveying a sheet material as a recording medium by pinching it comprises a foreign material eliminating means 40 for eliminating a foreign material transferred from the sheet material to the conveying means 21, and has a foreign material collecting section 41 for collecting the foreign material eliminated by the foreign material eliminating means 40 near the conveying means 21 which requires to eliminate foreign materials, and the foreign material collecting section 41 includes a bent part 40a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet material conveying device used in an image forming apparatus such as a PPC, a laser beam printer, a facsimile machine, a scanner device, etc., an image forming apparatus provided with the sheet material conveying device, and an automatic document feeder.

Conventionally, image forming apparatuses such as copiers and printers are generally compatible with various sizes and types of paper. Such an image forming apparatus needs to cope with recording paper such as foreign paper that is liable to generate foreign matter such as paper dust.
In response to such demands, in image forming apparatuses, means for removing foreign matters such as paper dust and waste toner provided on rollers or belts are widely used. For example, in a registration roller that operates in synchronization with the formation of a toner image on an image forming body in an image forming apparatus and transports the recording paper to a transfer position where transfer by a transfer unit is performed, the recording paper is transferred to the registration roller. A foreign matter removing means for removing paper dust is known (see Patent Document 1).
Japanese Patent Application Laid-Open No. 07-025503

However, even in such a conventional technique, when transporting paper with a lot of paper dust, the collected paper powder overflows and adheres to the paper, and paper dust spills when removing the accumulated paper powder. There was a problem.
Foreign matter such as paper dust and waste toner collected by the removing means accumulates in the collection unit. However, in an environment where there is a large amount of foreign matter such as paper with a lot of paper dust, the collection unit may overflow and not collect. It is conceivable that foreign matter may be spilled when it is attached or detached when it is configured to be removable.
In addition, when the folded part is folded back to the collecting part, the foreign matter collected by the removing means accumulates on the folded part, or the collected foreign matter is inclined and spilled. It is conceivable that it cannot be suppressed.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to take into account the above-described situation, and to collect and remove foreign matter without any problem even when foreign matter is collected, and image formation such as PPC, printer, facsimile using the same. To provide an apparatus.

In order to solve the above-described problem, the invention according to claim 1 is a sheet material conveyance device having a conveyance unit that nipping and conveying a sheet material that is a recording medium, and has been transferred from the sheet material to the conveyance unit. Foreign matter removing means for removing foreign matter, a foreign matter collecting portion for collecting foreign matter removed by the foreign matter removing means, a holding member for holding the foreign matter removing means in the foreign matter collecting portion, and a folded portion provided in the foreign matter collecting portion And a sheet material conveying device comprising:
The invention according to claim 2 is characterized in that the folded portion is provided separately from the foreign matter removing means and the foreign matter collecting portion.
According to a third aspect of the invention, the sheet material conveying device according to the first aspect is characterized in that the conveying means is a registration roller.
According to a fourth aspect of the invention, there is provided the sheet material conveying device according to the first aspect, wherein the conveying means is a transfer belt.
According to a fifth aspect of the present invention, the sheet material conveying device according to the first aspect is characterized in that the conveying means is a conveying belt.

According to a sixth aspect of the present invention, the foreign matter collecting portion is configured to be removable, and the foreign matter collecting portion is configured such that an opening for collecting foreign matter is opened during attachment and the opening is closed during removal. The sheet material conveying apparatus according to claim 1, further comprising a movable part that is movable.
The invention according to claim 7 is characterized in that the movable member is the foreign matter removing means.
According to an eighth aspect of the present invention, there is provided an image forming apparatus for transferring a toner image formed on a photosensitive member to a recording medium, wherein the image forming apparatus comprises the sheet material conveying apparatus according to any one of the first to seventh aspects. It is characterized by.
According to a ninth aspect of the present invention, there is provided an automatic document feeder that automatically conveys and reads a document, wherein the automatic document feeder includes the sheet material conveying device according to any one of the first to seventh aspects. To do.

According to the present invention, since the foreign matter collecting part is provided with the folding part, the foreign matter once dropped in the foreign matter collecting part is collected, and even if it overflows from the foreign matter collecting part, it is suppressed to the folded part, and the foreign matter is removed from the apparatus. In this case, it is possible to prevent foreign matter from spilling out even if the foreign matter collection unit is tilted when the foreign matter collection unit is replaced or removed.
According to the present invention, the foreign material recovery unit that recovers the foreign material removed in the sheet material conveying apparatus has a configuration that can be removed, and when the foreign material recovery unit is removed, the folded portion can be removed together with the foreign material recovery unit 41. . By providing the foreign matter collection unit side from which the folded portion can be removed, the foreign matter collection unit can be detached without spilling the foreign matter collection unit even when the foreign matter collection unit is tilted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic front view showing an overall configuration of an image forming apparatus equipped with a sheet conveying apparatus of the present invention.
As shown in FIG. 1, the image forming apparatus 1 is a monochrome copying machine that reads an image from a document surface of a document and forms a copy image on various types of paper.
This copying machine has an image forming apparatus main body 2 for performing predetermined image forming processing based on a read original image, and the image forming apparatus main body 2 mounted on the main body with a recording medium such as a recording sheet or an OHP film. A paper feeding device that supplies a certain paper S one by one is provided. In addition, it has a document reading device 4 attached on the image forming apparatus main body 2 for reading a document image and sending the document image information to the image forming apparatus main body 2.
A paper discharge tray 9 is installed in the upper part of the image forming apparatus main body 2, and a transport path R <b> 1 is formed as a path for moving the paper S from the paper supply device 3 to the paper discharge tray 9. Most of the transport path R1 extends in a substantially vertical direction, and on the transport path R1, a predetermined interval corresponding to the minimum size paper S is secured, and several transport roller pairs, roller pairs, and the like are configured. Paper (sheet material) conveying means is provided.

The sheet S on the conveyance path R1 is always conveyed by any sheet conveying means by nipping or the like. Further, the sheet feeding device 3 is accommodated in each stage of the sheet feeding device 3. A paper transport device 5 for feeding paper to the transport path R1 is installed.
In the image forming apparatus main body 2, a photoconductor unit 10 and a fixing device 11 are sequentially arranged in the middle of the transport path R1. The photoreceptor unit 10 transfers the generated toner image to the sheet S conveyed on the conveyance path R1.
Thereafter, the fixing device 11 fixes the transferred toner image on the paper S, and discharges the paper S on which the toner image is fixed to the paper discharge tray 9 positioned at the end of the transport path R1. .
The photoconductor unit 10 includes a single drum-like photoconductor 10A that is an image carrier, and the photoconductor 10A is formed in a cylindrical shape having a predetermined diameter and is supported rotatably about a horizontal axis. Has been.
The photosensitive member 10A receives a rotational driving force from a driving source (not shown) such as a motor provided in either the photosensitive member unit 10 or the image forming apparatus main body 2, and is stable at a constant speed in a predetermined rotational direction. It is designed to be driven by rotation.

Further, a developing device 12, a transfer device 13, a photoconductor cleaning device, a charge eliminating device, a charging device, and the like are arranged in the order of going around the photoconductor unit 10 and counterclockwise.
Each of these devices sets the development position, transfer position, cleaning position, charge removal position, and charging position sequentially from upstream to downstream within the range of one rotation in the counterclockwise rotation direction of the photoreceptor. Is done.
Further, a latent image forming position is set between the charging position and the developing position, and exposure is performed to write an invisible latent image corresponding to image information by irradiating the latent image forming position with a predetermined laser beam. The apparatus 15 is disposed obliquely below and slightly away from the photoconductor unit 10.
The photoconductor 10A is driven to rotate counterclockwise, and in synchronization with the rotation of the photoconductor 10A, each device and the exposure device 15 perform a series of image forming processes by a predetermined cooperative operation. To do.
That is, the developing device 12 has an appropriate configuration such as a developing roller that generates a toner brush in which toner particles are erected radially from the surface thereof. By the image forming process described above, a latent image is generated at a predetermined location on the surface of the photoconductor 10A, and moves around the periphery as the photoconductor 10A rotates, and passes through the development position.
At this time, the developing device 12 attaches toner particles at the tip of the toner brush to the latent image so that the invisible latent image is visualized with a monochrome toner image.

The transfer device 13 includes two support rollers that are arranged to face each other at a predetermined distance in a substantially vertical direction, and a transfer belt 17 that is stretched around these support rollers. The toner image on the outer peripheral surface of the photoreceptor 10A is transferred to the sheet S, and the sheet S on which the unfixed toner image is transferred is conveyed upward.
That is, the lower support roller has a portion where the transfer belt 17 is wound is pressed against a substantially right lower portion of the photoconductor 10A, and the transfer position is at a position where the surface of the photoconductor 10A and the transfer belt 17 are in contact with each other. Is set. The upper support roller is disposed in front of the introduction port of the fixing device 11.
The photoconductor cleaning device 18 is a blade material (not shown) configured such that the blade edge at the tip thereof is in contact with the cleaning position on the photoconductor 10A with a predetermined pressure, or the photoconductor is in contact with the photoconductor cleaning position. The rotating brush (not shown) that rotates following the rotation of 10A, or both, is configured to remove toner, foreign matter, and the like remaining on the surface of the photoreceptor 10A after transfer.
Although not shown, the static eliminator is mainly composed of a lamp capable of emitting light of a predetermined intensity. The neutralization position is irradiated with light for neutralization from this lamp to release the charged state on the surface of the photoconductor 10A passing through the neutralization position, and the surface potential of the photoconductor 10A after passing through the transfer position is changed to the initial state. To return to.

Note that reference numeral 20 in FIG. 1 denotes a toner storage container including a toner bottle that stores a predetermined amount of new toner. A toner conveyance path (not shown) is formed from the toner container 20 to the developing device 12. When the developing device 12 consumes the toner in the developing device 12 for development, the developing device 12 is replenished with new toner from the toner storage container 20.
Below the image forming apparatus main body 2 is provided a paper feeding device 3 that can select a paper size automatically according to the size of a document to be read or by manual setting by a user. In other words, the sheet feeding device 3 stores a plurality of sheet feeding trays 51 arranged in multiple stages, and each sheet feeding tray 51 has different sizes and different vertical and horizontal orientations with respect to various sizes and sheet conveying directions. A plurality of sheets S are stored in a stacked manner.
The document reading device 4 has a predetermined range on the upper surface of the reading device main body formed by the contact glass 57, and optically reads and acquires the predetermined range on the surface of the contact glass 57 in the reading device main body. The reading means for storing is stored.
The reading means includes at least a first traveling body, a second traveling body, an imaging lens 55, and a reading sensor 56. A document holding plate 58 configured to be opened and closed between a closed position covering the contact glass 57 and an opened position opened is disposed on the upper surface of the reading apparatus main body.
That is, the document pressing plate 58 has a larger vertical and horizontal dimension than the contact glass 57, and one end thereof is pivotally supported on the upper surface of the reading apparatus main body by a hinge (not shown).
In the copying machine 1 configured as described above, when copying a document, the user manually opens the document pressing plate 58 of the document reading device 4 from the closed position to the opened position.

A document is set on the contact glass 57 of the document reading device 4 and then manually operated in a direction to close the document pressing plate 58. The document set on the contact glass 57 is pressed from above by the document pressing plate 58.
That is, by this, the original is brought into close contact with the contact glass 57 so as to be accurately read, and spread in a flat shape, and the original is fixed on the contact glass 57.
Then, when the user turns on a start switch installed in an operation screen (not shown) provided in advance in the copying machine 1, the reading operation of the document reading device 4 is immediately started, and the first traveling body is driven by a driving mechanism (not shown). And a 2nd traveling body is drive | worked.
Light is emitted from the light source 53 of the first traveling body toward the document, and reflected light from the document surface is directed to the second traveling body. The reflected light is reflected by the mirror 54 of the second traveling body and is input to the optical reading sensor 56 via the imaging lens 55. As a result, the reading sensor 56 reads an image on the original surface.

When the start switch is turned on as described above, the photoconductor 10A of the photoconductor unit 10 starts rotating, and an operation for forming a toner image on the photoconductor 10A based on the read original image. To start.
That is, as the photoconductor 10A rotates, predetermined positions on the outer peripheral surface of the photoconductor 10A are set in order by the charging device, the exposure device 15, the developing device 12, the transfer device 13, the photoconductor cleaning device 18, and the charge eliminating device, respectively. Pass through each position. Thereby, the battery is sequentially charged to a predetermined charged state, a latent image is generated, and the toner image is visualized.
After the toner image is transferred to the paper S, residual toner is removed, the charged state is released, and one cycle is completed. Depending on the size of the image to be formed, the cycle is continued for a predetermined period so as to generate a toner image in a range of a predetermined length of the outer peripheral surface in the rotation direction.

On the other hand, when the start switch is pressed, the sheet feeding device (sheet feeding tray) 51 containing the automatically or manually selected sheet S in the sheet feeding device 3 is moved by the sheet conveying device 5 associated with the sheet feeding step. One sheet S is conveyed to the sheet feeding path R1 through a predetermined path.
The sheet S is transported substantially upward on the transport path R1 in the image forming apparatus main body 2 by a transport roller or the like, hits the registration roller 21 and temporarily stops.
On the other hand, in the case of manual feed, the paper S set on the manual feed tray 67 is first fed out by the rotation of the paper feed roller 67B for the manual feed tray. When a plurality of sheets are stacked and set, they are separated into one sheet by the separation roller 67A for the manual tray and conveyed to the manual sheet feed path R2.
The sheet is conveyed from the manual sheet feeding path R2 to the sheet feeding path R1, and finally comes into contact with the registration roller 21 and stops temporarily. Then, the registration roller 21 starts to rotate at an accurate timing in accordance with the relative movement of the toner image on the photoconductor 10A that has been rotationally driven, and sends the temporarily stopped paper S to the transfer position. As a result, the toner image is transferred onto the paper S by the transfer device 13.

The sheet S on which the unfixed monochrome toner image is transferred is transported to the fixing device 11 by the transfer belt 17 of the transfer device 13 that forms a part of the transport path R1. The fixing device 11 applies heat and pressure within a predetermined range to fix the toner image on the paper S.
The sheet S on which the toner image has been fixed in this manner is guided to the conveyance path R1 reaching the sheet discharge tray 9 by the switching claw 34, and is discharged onto the sheet discharge tray 9 by the discharge rollers 37 and 38. Stacked on the tray 9.
Further, when the double-sided copy mode is selected by the user's setting input, the paper S with the image fixed on one side is conveyed to the paper reversing device 31 side by the switching claw 34. In the sheet reversing device 31, a plurality of pairs of rollers 66 arranged at a predetermined position and a guide member (not shown) are reciprocated on a reverse conveyance path R3 formed in advance at a predetermined position.
After reversing the vertical direction of the sheet S surface, the sheet S is returned to the transport path R1 from a position positioned in front of the photosensitive unit 10. After being transported on the transport path R1 and guided again to the transfer position, this time the image is transferred and fixed on the back surface of the sheet S, and finally discharged onto the discharge tray 9 by the discharge rollers 37 and 38. .

FIG. 2 is an enlarged schematic view showing the first embodiment of the sheet material conveying apparatus of the present invention arranged in the image forming apparatus. For example, in the image forming apparatus 1 of FIG. 1, a mylar 40 is installed on the registration roller 21 so as to come into contact with the registration roller 21 as a foreign matter (paper dust) removing unit. This mylar 40 is supported by a holding member 42.
Further, the paper dust collecting unit 41 is provided together with the paper dust removing means 40, and the paper dust collecting unit 41 is configured to be removable. Mylar 40, which is a foreign matter removing means, has a folded portion 40a in the paper dust collecting portion 41, and this folded portion 40a is inclined toward the paper dust collecting portion 41 side. When the paper dust collecting unit 41 is removed, the folding portion 40a can be removed together with the paper dust collecting unit.
By providing the folding unit 40a in the paper dust collecting unit 41, foreign matter once dropped in the paper dust collecting unit 41 is accumulated, and even if it tries to overflow from the paper dust collecting unit 41, it is suppressed by the folding unit 40a. When removing the paper dust, it is possible to prevent foreign matter from spilling out even if the paper dust collection unit 41 is tilted when the paper dust collection unit 41 is replaced or removed.
By configuring the folded portion 40a to be inclined toward the paper dust collecting portion 41, which is the direction toward the portion where the collected foreign matter is accumulated, it is possible to prevent the foreign matter from overflowing beyond the folded portion 40a.
This is realized by folding back at least a member (mylar) 40 serving as a paper dust removing unit in order to have the folded portion 40a in the paper powder collecting unit 41, and a simple component configuration can be achieved.
In addition, since the paper dust collecting unit 41 is disposed in the vicinity of the registration roller 21 that is the conveying means, it is possible to prevent the paper dust from overflowing or spilling when the paper dust adhering to the registration roller 21 is collected.

FIG. 3 is an enlarged schematic view showing a second embodiment of the sheet material conveying device arranged in the image forming apparatus. For example, in the image forming apparatus of FIG. 1, the mylar 0 is arranged on the registration roller 21 so as to come into contact with the registration roller 21 as a foreign matter (paper dust) removing unit.
The paper dust collecting unit 41 is provided together with the paper dust removing means, and the paper dust collecting unit 41 is configured to be removable. The sheet metal 42 that is a holding member of the mylar 40 that is a foreign matter removing means has a folded portion 42a in the paper dust collecting portion 41, and the folded portion 42a is inclined toward the paper dust collecting portion 41 side.
As described above, since the folded portion 42a is provided at least on the holding member 42 of the foreign matter (paper dust) removing means 40, the sheet material can be conveyed with a simple component structure and without limiting the members of the foreign matter removing means 40. An apparatus can be realized.

FIG. 4 is an enlarged schematic view showing a third embodiment of the sheet material conveying device arranged in the image forming apparatus. For example, in the image forming apparatus 1 of FIG. 1, a mylar 40 is disposed on the registration roller 21 so as to come into contact with the registration roller 21 as a foreign matter (paper dust) removing unit.
Moreover, it has the paper dust collection | recovery part 41 with the paper dust removal means 40, and this paper dust collection | recovery part 41 becomes a structure which can be removed. An additional member 43 serving as a folding portion is provided in the holding member 42 of the mylar 40 in the paper dust collecting portion 41, and the folding portion 43 is inclined toward the paper dust collecting portion 41 side.
In this way, the folded portion 43 is provided as a member separate from the member 40 and the holding member 42 of the paper dust removing unit, so that the paper dust removing unit 40 and the paper dust removing unit can be configured with a simple component configuration. The sheet material conveying apparatus can be realized without restricting the 40 holding members 42.

FIG. 5 is an enlarged schematic view showing a fourth embodiment of a sheet material conveying device arranged in the image forming apparatus. For example, in the image forming apparatus of FIG. 1, urethane foam 44 is installed on the transfer belt 17 so as to come into contact with the transfer belt 17 as a foreign matter (waste toner) removing unit.
Further, a waste toner collecting unit 45 is provided together with the foreign matter removing means 44. In the waste toner collecting section 45, a holding member 46 for appropriately holding the urethane foam 44 as a foreign matter removing means is provided with an additional member 46a serving as a folded section, and the folded section 46a is inclined toward the waste toner collecting section 45 side. ing.
As described above, since the waste toner collecting unit 45 is provided in the vicinity of the transfer belt 17 serving as a sheet material conveying unit, overflow and spillage when collecting foreign matters such as paper dust and toner adhering to the transfer belt 17 are prevented. be able to.

FIG. 6 is an enlarged schematic view showing a fifth embodiment of the sheet material conveying device arranged in the image forming apparatus. For example, in the image forming apparatus shown in FIG. 1, the grip roller has a configuration in which a sheet material is sandwiched between a conveyance roller (second conveyance unit) 7 and a conveyance belt (belt conveyance unit) 8.
The conveyor belt 8 is provided with a mylar 40 so as to come into contact with the conveyor belt 8 as a foreign matter (paper dust) removing means, and is provided with a paper dust collecting unit 41 together with the paper dust removing means 40.
The conveyor belt 8 is stretched over pulleys 8a and 8b. In this paper dust collecting unit 41, the holding member 47 of the mylar 40 is provided with an additional member 47a serving as a folding part, and the folding part 47a is inclined toward the paper dust collecting part 41 side.

FIG. 7 is an enlarged schematic view showing a sixth embodiment of the sheet conveying apparatus arranged in the image forming apparatus. FIG. 8 is an enlarged schematic view showing a state where the paper dust collecting unit of the sixth embodiment of the sheet conveying apparatus of FIG. 7 is removed.
Referring to FIGS. 7 and 8, for example, in the image forming apparatus shown in FIG. 1, a mylar 40 is installed on the registration roller 21 so as to come into contact with the registration roller 21 as a foreign matter (paper dust) removing unit. In addition, a paper dust collecting unit 41 is provided together with the paper dust removing means 40, and the paper dust collecting unit 41 is configured to be removable.
The paper dust collecting unit 41 has an opening 41d for collecting foreign matter (paper dust) when set, and has a movable part 41c for closing the opening 41d when detaching. The movable portion 41c is accommodated so as to close the opening 41d when removed. However, at the time of setting, the main body side fixing member (protrusion from the side plate of the conveyance path, stays around the registration roller, etc.) abuts and is pushed up to open the opening 41d.
As described above, the foreign material collecting unit 41 that collects the foreign material removed in the sheet material conveying apparatus has a configuration that can be removed, and when the foreign material collecting unit 41 is removed, the folded portion 41a can be removed together with the foreign material collecting unit 41. did.
By providing the folded portion 41a on the detachable foreign matter collecting portion side, the foreign matter collecting portion 41 can be detached without spilling even if the foreign matter collecting portion 41 is tilted when the foreign matter collecting portion 41 is detached.

FIG. 9 is an enlarged schematic view showing a seventh embodiment of the sheet conveying apparatus arranged in the image forming apparatus. FIG. 10 is an enlarged schematic diagram illustrating a state where the paper dust collecting unit of the seventh embodiment of the sheet conveying apparatus of FIG. 9 is removed.
7 and 8, for example, in the image forming apparatus 1 of FIG. 1, a mylar 40 is installed on the registration roller 21 so as to come into contact with the registration roller 21 as a foreign matter (paper dust) removing unit. . In addition, the paper dust collecting unit 49 is provided together with the mylar 40 which is a paper dust removing means, and the paper dust collecting unit 49 can be removed.
The paper dust collecting unit 49 has an opening 49d for collecting foreign matter (paper dust) at the time of setting, and has a movable part 49c that closes the opening 49d when detaching. Unlike the sixth embodiment, the movable portion 49c is disposed below the paper dust collecting portion 49.
In the paper dust collecting unit 49, the mylar 40, which is a foreign matter removing means, hits a fixing member 50 (a protrusion from the side plate of the conveyance path, a stay around the registration roller, etc.) 50 below the registration roller 21 on the main body side.
Thereby, the mylar 40 is pressed against the registration roller 21. However, the pressure is released when desorbing, and the opening 49 d is closed by the mylar 40.
As described above, the movable portion 49c that is movable when the foreign matter collecting unit 49 is attached / detached is used as a foreign matter removing member, so that the foreign matter removing means 40 is added to the foreign matter collecting unit with a simple configuration without adding parts. It is possible to prevent the foreign matter removing means 40 from being damaged even when the foreign matter removing means 40 is removed by being accommodated in 49.

The image forming apparatus 1 in FIG. 1 may be a copier, a printer, a facsimile, or the like with the same basic configuration and operation as the above-described embodiment. The image forming apparatus 1 shown in FIG. 1 can also be used in an automatic document feeder (ADF) (not shown) disposed above the document pressing plate 58.
That is, unlike the image forming apparatus 1 of FIG. 1, an automatic document feeder (ADF) is arranged in which the document pressing plate 58 is removed, a document is placed at that position, and the document is automatically conveyed and read. In this case, if the sheet conveying apparatus according to the present invention is used as a sheet conveying apparatus for conveying an original, foreign matter (paper dust) can be conveniently removed.

1 is a schematic front view showing an overall configuration of an image forming apparatus equipped with a sheet material conveying apparatus of the present invention. 1 is an enlarged schematic diagram illustrating a first embodiment of a sheet material conveying device of the present invention disposed in an image forming apparatus. FIG. 5 is an enlarged schematic diagram illustrating a second embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 6 is an enlarged schematic diagram illustrating a third embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 10 is an enlarged schematic diagram illustrating a fourth embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 10 is an enlarged schematic view showing a fifth embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 10 is an enlarged schematic diagram showing a sixth embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 8 is an enlarged schematic diagram illustrating a state where a paper dust collecting unit of the sixth embodiment of the sheet material conveying apparatus of FIG. 7 is removed. FIG. 10 is an enlarged schematic diagram illustrating a seventh embodiment of a sheet material conveying device arranged in the image forming apparatus. FIG. 10 is an enlarged schematic diagram illustrating a state where a paper dust collecting unit of the seventh embodiment of the sheet material conveyance device of FIG. 9 is removed.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus (copy machine, printer, facsimile), 2 ... Image forming apparatus main body, 3 ... Paper feeding device, 4 ... Document reading device, 5 ... Conveying means (paper conveying apparatus), 6 ... Conveying means (first (Conveying means), 7 ... conveying means (second conveying means), 8, 17 ... conveying means (conveying belt), 8a, 8b ... pulley, 10A ... photoconductor, 11 ... fixing device, 12 ... developing device, 13 ... transfer Apparatus, 21 ... Conveying means (registration roller), 40 ... Foreign matter (paper dust) removing means (mylar), 40a ... Folding portion (one part of mylar), 41 ... Foreign matter (paper dust) collecting portion, 42 ... Holding member ( Sheet metal), 42a ... folded portion, 43 ... additional member (folded portion), 44 ... urethane foam (waste toner removing means), 45 ... foreign matter (waste toner) collecting portion, 46 ... holding member, 46a ... folded portion, 47 ... Holding member, 47a ... Addition Material (folding part), 48 ... fixing member (guide plate, stay), 50 ... fixing member (guide plate, stay), 51 ... feed tray, 67 ... manual feed tray, R1 ... main transport path, R2 ... manual feed Transport path, R3 ... reverse transport path, ADF ... automatic document feeder, S ... paper (recording medium, sheet material)

Claims (9)

  In a sheet material conveying apparatus having a conveying means for nipping and conveying a sheet material as a recording medium, the foreign material removing means for removing the foreign material transferred from the sheet material to the conveying means, and the foreign material removed by the foreign material removing means A sheet material conveying apparatus comprising: a foreign material collecting unit to be collected; a holding member that holds the foreign material removing unit in the foreign material collecting unit; and a folding unit provided in the foreign material collecting unit.   The sheet material conveying device according to claim 1, wherein the folding portion is provided separately from the foreign matter removing unit and the foreign matter collecting portion.   2. The sheet material conveying apparatus according to claim 1, wherein the conveying means is a registration roller.   The sheet material conveying apparatus according to claim 1, wherein the conveying unit is a transfer belt.   The sheet material conveying apparatus according to claim 1, wherein the conveying unit is a conveying belt.   The foreign matter collecting part is configured to be detachable, and the foreign matter collecting part includes a movable part that is movable so that an opening for collecting the foreign substance is opened at the time of attachment and the opening is closed at the time of removal. The sheet material conveying device according to claim 1, wherein   The sheet material conveying device according to claim 6, wherein the movable portion is the foreign matter removing means.   8. An image forming apparatus for transferring a toner image formed on a photosensitive member to a recording medium, comprising the sheet material conveying device according to claim 1.   An automatic document feeder comprising: the sheet material conveying device according to claim 1, wherein the automatic document feeder is configured to automatically convey and read a document.

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