JP6865000B2 - Sheet transfer device - Google Patents

Description

The present invention relates to, for example, a sheet transport device arranged below a printing unit of an inkjet printing device that ejects ink from an inkjet head onto a sheet (paper) to be a recording medium for printing.

As an image forming apparatus for forming a desired image on paper, which is a sheet-shaped recording medium, a plurality of line heads are arranged side by side along the paper conveying direction, and the conveyed paper is subjected to from the nozzle of each line head. Inkjet printing devices are known in which ink is ejected to form a desired image.

In this inkjet printing device, when a plurality of sheets of paper are continuously transported directly under the line head, the head surface of the line head is damaged due to the raised sheet edge and the line head is damaged while preventing the position of the paper from being displaced during the transfer. In order to prevent stains due to ink adhering to the surroundings, a suction transport belt having a plurality of ventilation holes is provided, and the paper is sucked and sucked onto the belt surface of the suction transport belt through the ventilation holes by a negative pressure generating means. (For example, see Patent Document 1 below).

Japanese Unexamined Patent Publication No. 2015-199595

In the conventional transfer device including the transfer device of Patent Document 1, the suction transfer belt is designed for the width dimension and the length in the transfer direction according to the maximum size of paper (for example, A3 paper) that can be conveyed. The action of the suction force of the belt extends to the entire belt surface. Therefore, for example, when a print job using A4 paper having a width smaller than that of A3 paper is executed, the area on the belt surface other than the passage area through which the paper passes is the area where only air is sucked (that is, the paper passes through). It becomes a non-passing area).

By the way, the size of the non-passing area on the belt surface is defined by the size of the paper to be conveyed, but depending on the size of this non-passing area, the air flow of the sucked air is irregularly disturbed and occurs at the time of ink ejection. Fine ink mist may adhere to the belt surface. Therefore, when a paper having a width wider than the previous paper size is conveyed during the printing job, there is a possibility that the ink adhering to the non-passing area may adhere to the back surface of the paper and stain the paper. ..

Therefore, the present invention has been made in view of the above problems, and provides a sheet transport device that suppresses adhesion of ink mist generated during printing in an inkjet head printing device to the belt surface to prevent sheet contamination. The purpose is to do that.

In order to achieve the above object, the first aspect according to the present invention is an endless suction transport belt provided with a plurality of ventilation holes.
A suction means that sucks air from the back surface side of the suction transport belt through the ventilation hole and sucks and holds the sheet on the surface of the suction transport belt.
In the sheet transfer device equipped with
The passing area of the sheet on the belt surface of the suction transport belt is defined as the intake area of the suction means, and the non-passing area of the sheet on the suction transport belt is defined as the exhaust area of the suction means.
The seat transport device is characterized by comprising a sorting means for classifying each area by adjusting the intake area or the exhaust area according to a seat width orthogonal to the seat transport direction of the seat.
In addition, in order to achieve the above-mentioned object, the second aspect according to the present invention is
An endless suction transport belt with multiple vents and
A suction means that sucks air from the back surface side of the suction transport belt through the ventilation hole and sucks and holds the sheet on the surface of the suction transport belt.
In the sheet transfer device equipped with
The suction transport belt is a single belt in which a plurality of the vent holes are provided along the transport direction and the width direction.
When the passing area of the sheet on the belt surface of the suction transport belt is used as the intake area of the suction means, and the non-passing area of the sheet on the suction transport belt is used as the exhaust area of the suction means.
It is provided with a dividing means for dividing each area by adjusting the intake area or the exhaust area according to the seat width of the seat.
The suction means is a sheet transport device that is movably provided in the width direction so as to suck only below the suction area of the suction transport belt classified by the sorting means. ..

A third aspect of the present invention is the sheet transport device according to the first or second aspect, wherein the sorting means has the intake area and the intake area on the back surface side of the suction transfer belt according to the sheet width of the sheet. It is a sheet transfer device characterized by being provided with a pair of partition plates whose intervals can be adjusted so that the exhaust areas are divided.

A fourth aspect of the present invention is the sheet transport device according to any one of the first to third aspects, wherein the sorting means is sucked between the intake area and the exhaust area by the suction means. It is a sheet transfer device characterized by forming a non-ventilated area that is not exhausted.

According to the sheet transfer device in the first or second aspect, the belt has the sheet passing area on the belt surface as the intake area and the sheet non-passing area as the exhaust area according to the seat width of the sheet passing through the suction transfer belt. Since the sorting means for sorting on the surface is provided, it is possible to prevent the ink mist generated during printing from adhering to the non-passing area of the belt surface. Therefore, for example, even when the printing job using a small-sized sheet (A4 paper) is changed to the printing job using a large-sized sheet (A3 paper), the back surface of the A3 paper is stained with ink mist. Does not adhere.

Further, since the non-passing area is used as the exhaust area, the effect of suppressing the ink mist generated at the time of ink ejection due to the exhausted air from adhering to the belt surface is achieved.

According to the sheet transfer device according to the third aspect, the sheet transfer area and the non-pass area on the belt surface are set along the transfer direction so as to be separated by a predetermined range without being adjacent to each other. It is possible to suppress the turbulence of the air flow due to the air exhausted from the exhaust area, which causes the turbulence of the printed image.

It is a schematic block diagram of the inkjet printing apparatus which mounts the sheet transfer apparatus which concerns on this invention. (A) is a schematic configuration diagram of the sheet transport device viewed from a plane, and (b) is a schematic configuration diagram of the device viewed from the transport direction side. It is the figure which showed typically the state of intake and exhaust in the vicinity of the suction transport belt surface of this apparatus. (A) is a diagram showing a state at the time of executing a print job using A4 paper in the same device, and (b) is a diagram showing a state at the time of executing a print job using A3 paper in the same device. (A), (b) is a figure which shows the other form example of the sheet transfer apparatus which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the attached drawings. The present invention is not limited to this embodiment, and all other feasible embodiments, examples, operational techniques, etc. that can be considered by those skilled in the art based on this embodiment are included in the scope of the present invention. To do.

In the following description with reference to the attached figures in the present specification, when the terms up, down, left, and right are used to indicate the direction or position, this means that the user shows each figure as shown in the figure. Matches up, down, left, and right when viewed in. Further, in the drawings attached to the present specification, for convenience of illustration and comprehension, the scale, aspect ratio, shape, etc. may be appropriately changed from the actual product and represented schematically. It is an example and does not limit the interpretation of the present invention.

Further, in the following description, the "conveying direction" is the direction in which the sheet (paper P) to be a recording medium at the time of printing is conveyed, and in the present embodiment, the length when the paper P is viewed in a plan view. It matches the side direction. Further, the "width direction" is a direction orthogonal to the transport direction (that is, a direction forming a right angle to the transport direction on the same plane), and in the present embodiment, coincides with the short side direction when the paper P is viewed in a plan view. To do.

[About the configuration of inkjet printing equipment]
First, the inkjet printing apparatus 100 on which the sheet conveying apparatus 1 according to the present invention is mounted will be described.
As shown in FIG. 1, the inkjet printing apparatus 100 according to the present embodiment is an image forming apparatus that prints a predetermined image on a sheet (paper P) as a recording medium, and is conveyed to a paper feeding unit 10. It includes a unit 20, a printing unit 30, a paper ejection unit 40, a reversing unit 50, a storage unit 60, a control unit 70, a setting display unit 80, and an image reading unit 90.

The print job executed by the inkjet printing apparatus 100 of the present invention includes various printing conditions (number of prints, print data (characters, images), single-sided / double-sided printing, color setting (single color, multicolor), output magnification, etc.). ) Is the set information.

This print job is information received from an external terminal such as a PC (personal computer) or a server for which printing conditions are set via various communication networks such as the Internet (Internet) and Ethernet (registered trademark). In addition, the print job may be information in which printing conditions are appropriately set by the setting display unit 80 in the document data obtained by reading the original paper medium by the image reading unit 90.

As shown in FIG. 1, a circulation path R1 is set as a transport path for the paper P serving as a printing medium in the housing of the inkjet printing apparatus 100.
This circulation path R1 is for returning to the normal path R2 again after exchanging the front and back of the transport direction of the image-formed paper P on the surface with the normal path R2 for transporting the image-formed paper P to the paper ejection unit 40. It is a closed loop-shaped circulation path composed of the inversion path R3 of the above. The paper P is image-formed while being conveyed in the counterclockwise direction shown in the circulation path R1, and is switched back by passing through the inversion path R3 as needed. Further, a paper feed path R4 connecting to and from the paper feed unit 10 is connected to the upstream side of the print unit 30 in the circulation path R1.

-Paper feed unit-
The paper feed unit 10 picks up one sheet at a time from the external paper feed table 11 installed so that a part of the paper is exposed to the outside of the housing and the paper P loaded on the external paper feed table 11 and supplies the paper P to the printing unit 30. Designated among the external paper feed roller 12 to be fed, the plurality of internal paper feed trays 13 arranged in the apparatus housing and loaded with different sizes of paper P for each size, and the paper P loaded on the internal paper feed tray 13. It is provided with a plurality of internal paper feed rollers 14 that pick up the paper P one by one and feed it to the printing unit 30. The paper feed unit 10 is arranged on the most upstream side of the transport path, and feeds the paper P of the size specified in the print job to the print unit 30.

-Transport section-
The transport unit 20 is arranged near the confluence of the paper feed path R4 and the reversal path R3, temporarily stops the paper P conveyed from the paper feed unit 10 or the reversal unit 50, corrects the skew, and then prints at a predetermined timing. A plurality of pairs of a resist roller 21 that conveys the paper toward the unit 30 and a suction transfer means 22 that arranges the paper P below the printing unit 30 and conveys the paper P while sucking and holding the paper P at the center position. It is provided with a top surface transfer roller 23 which is composed of transfer rollers and conveys the paper P conveyed by the suction transfer means 22 so as to make a U-turn from the right direction to the left along the normal path R2. The transport unit 20 transports the paper P in a predetermined direction in the circulation path R1.

-Printing department-
The printing unit 30 corresponds to a plurality of color inks (four colors of black (K), cyan (C), magenta (M), and yellow (Y)) having a plurality of head blocks arranged in a staggered pattern along the width direction. The line-type inkjet heads are arranged in parallel with each other in the width direction from the upstream side to the downstream side in the paper transport direction. The printing unit 30 prints a predetermined image according to the print job on the paper P conveyed by the conveying unit 20.

-Paper ejection part-
The paper ejection unit 40 includes a paper ejection table 41 on which the ejected paper P is loaded, and a paper ejection roller 42 that ejects the paper P conveyed by the upper surface transport roller 23 toward the paper ejection table 41. There is. The paper ejection unit 40 is normally connected to the downstream end of the path R2 and ejects the printed paper P.

-Inverted part-
The reversing section 50 temporarily carries the paper P conveyed by the upper surface conveying roller 23 into the switchback portion 52, then carries it out, and temporarily conveys the reversing roller 51 and the paper P to the re-feeding roller 53. The switchback portion 52, which is a space for carrying in the paper, the re-feeding roller 53 that conveys the paper P conveyed by the reversing roller 51 to the registration roller 21, and the paper P conveyed from the upper surface conveying roller 23. Is provided with a switching gate 54 that guides the paper P to the reversing roller 51 and guides the paper P carried out from the switchback portion 52 by the reversing roller 51 to the re-feeding roller 53. The reversing section 50 is provided in the reversing path R3, and after inverting the front and back of the single-sided printed paper P conveyed from the normal path R2, performs a direction reversing process of switching the front and back of the conveying direction while conveying the reversing path R3. Then, it is conveyed to the resist roller 21.

-Memory part-
The storage unit 60 is composed of, for example, a flash memory, an HDD (Hard Disk Drive), or the like, and stores various information (computer programs, application software, etc.) necessary for driving each unit of the inkjet printing apparatus 100, and also stores various information (computer programs, application software, etc.). Temporarily memorize the set print job.

―Control unit―
The control unit 70 is composed of a processor such as a CPU (Central Processing Unit), and by reading a computer program and various application software stored in the storage unit 60 and performing program processing, in addition to printing processing based on a print job, The control processing of the entire inkjet printing apparatus 100 and the arithmetic processing necessary for various processing are executed.

The control unit 70 has a built-in interface unit (not shown), receives a print job from an external terminal (not shown) via a communication network, and stores the received print job in the storage unit 60.

-Setting display section-
The setting display unit 80 is an input device composed of, for example, operation keys and a display / input panel, and is provided on the outside of the housing. When the setting display unit 80 performs a predetermined operation when setting various setting information required for the inkjet printing device 100 in addition to setting a print job by the user, the operation signal is output to the control unit 70.

-Image reader-
The image reading unit 90 has a light source that emits light that irradiates the document, a CCD image sensor that receives reflected light from the document and performs photoelectric conversion, and optically reads the image of the document to generate image data. .. The image reading unit 90 reads the original when the copy function and the scanner function are used.

The sheet transport device 1 according to the present invention is mounted as the suction transport means 22 of the transport unit 20 described above, and the intake area E1 and the exhaust area E2 are combined with the length (width dimension) of the paper P in the width direction. It is divided on the belt surface 4a to prevent the ink mist generated when the ink is ejected from the printing unit 30 from adhering to the belt surface 4a.

[About sheet transfer device]
Next, the sheet transport device 1 according to the present invention will be described with reference to FIGS. 2 to 4.
As shown in FIGS. 2A or 2B, the sheet transfer device 1 of the present embodiment has an endless suction transfer belt 4 hung on the drive roller 2 and the driven roller 3, and the back surface of the suction transfer belt 4. The paper P is composed of a suction means 5 which is a negative pressure generating means for generating a negative pressure for sucking air near the belt surface 4a from the side.

In the present embodiment, since the sheet transfer device 1 of the present invention is mounted on the inkjet printing device 100, the control unit 70 that controls the inkjet printing device 100 controls the drive of each part of the sheet transfer device 1. However, it is also possible to provide a control unit dedicated to the sheet transfer device 1. In that case, the movement amount of the suction means 5 can be controlled according to the width dimension of the paper P by sharing the print job information with the control unit 70 of the inkjet printing apparatus 100.

A plurality of ventilation holes 4b for sucking air in the vicinity of the belt surface 4a by the suction means 5 are formed on the belt surface 4a of the suction transfer belt 4. In the illustrated example, the ventilation holes 4b are arranged in rows at predetermined intervals parallel to the moving direction (transporting direction) of the suction transport belt 4, and a plurality of the rows are arranged along the width direction. ing.

The sheet transfer device 1 is arranged below the printing unit 30 and sucks and holds the paper P conveyed from the resist roller 21 on the suction transfer belt 4 and conveys the paper P. Further, the moving speed of the suction transport belt 4 by the sheet transport device 1 (that is, the transport speed of the paper P) is, for example, an encoder provided on the driven roller 3 so as to be a transport speed suitable for the content of the print job (shown in the figure). The rotation speed of the drive motor (not shown) connected to the drive roller 2 is controlled by the control unit 70 based on the output of the drive motor (not shown).

Further, as shown in FIG. 2A, the belt surface 4a of the suction transport belt 4 has an area for sucking and exhausting air around the belt surface 4a according to the width dimension of the paper P used in the printing job. Two areas, "intake area E1" and "exhaust area E2", are set as.

Since the suction area E1 sucks and attracts the paper P to the belt surface 4a, the air around the belt surface 4a is sucked by the negative pressure of the suction means 5, and the paper P passing over the belt surface 4a during printing. It is set to be almost the same as the passing area. Further, the exhaust area E2 is an area for exhausting the air taken in by the intake area E1 from below the belt surface 4a toward the outside, and is a non-passing area (non-passing area) on the belt surface 4a through which the paper P does not pass during printing. That is, the area where the paper P is not sucked and attracted).

The suction means 5 is composed of a pair of suction fans in which the intake port 5a is arranged on the front side which is the facing surface and the exhaust port 5b is provided on the back side. The suction means 5 is provided so as to be relatively movable in the width direction (left-right direction in the drawing) directly under the belt surface 4a, and the width dimension of the paper P used in the printing job executed under the control of the control unit 70. Move in the width direction according to. As a result, the above areas E1 and E2 are defined on the belt surface 4a.

As shown in FIG. 2B, for example, the suction means 5 of the present embodiment is provided on a guide member (rail) 5d provided along the width direction at a lower position in the inner portion surrounded by the suction transfer belt 4. It is configured to slide appropriately in the left-right direction in the figure by the driving force of a driving means (motor or the like) (not shown), but if the suction means 5 is movable in the width direction according to the width dimension of the paper P. , Especially not limited to this configuration.

Further, the suction means 5 is provided with a dividing member 5c that separates the intake area E1 and the exhaust area E2 on the belt surface 4a of the suction transfer belt 4. The dividing member 5c of the present embodiment is provided on each intake port 5a side of the suction means 5, and is a plate member extending from the vicinity of the carry-in side end portion of the suction transport belt 4 to the vicinity of the carry-out side end portion along the transport direction. Hereinafter, it is also referred to as “partition plate 5c”).

Further, the sorting member 5c is arranged with a predetermined gap (about several mm) so as not to interfere with the rotational drive of the suction transport belt 4 during paper transport. The dimension of this gap may be at least a dimension that separates the intake area E1 and the exhaust area E2 on the belt surface 4a without the air taken in by the suction means 5 and the air exhausted by the suction means 5 intersecting.

By moving the suction means 5 provided with the partition plate 5c according to the width dimension of the paper P, as shown in FIG. 3, only the width dimension of the paper P on the belt surface 4a becomes the intake area E1. Air is sucked, and the area outside the width dimension of the paper P on the belt surface 4a is exhausted from the exhaust area E2 to the air sucked in the intake area E1.

As described above, the seat transport device 1 of the present invention is a pair of suction means 5 in which the intake ports 5a are arranged so as to face each other as the division means 6 for separating the intake area E1 and the exhaust area E2 set on the belt surface 4a. A partition plate 5c is installed on the intake port 5a side of the above, and one or both of the partition plates 5c can move relative to each other in the width direction in accordance with the width dimension of the paper P directly under the belt surface 4a of the suction transport belt 4. It has become.

As a result, when the printing job is executed, the suction means 5 is moved in the width direction so that the partition plate 5c comes to the position matching the width dimension of the paper P, and the intake area E1 and the exhaust area E2 are formed on the belt surface 4a. By separating the ink mist, the ink mist ejected during printing is not sucked in the non-passing area of the paper P, and the stain on the belt surface 4a is reduced.

The ink mist floating in the space between the printing unit 30 and the sheet transport device 1 due to the ink ejected during printing is exhausted to the outside by another exhaust means (not shown).

[Processing operation]
Next, an operation example during the printing process of the sheet transport device 1 mounted on the inkjet printing device 100 described above will be described with reference to FIGS. 4 (a) and 4 (b).
Here, after performing a print job for printing A4 paper as paper P, a print job for printing A3 paper as paper P is performed so that the long side of each paper P is parallel to the transport direction (vertical direction). This is an operation example when it is transported.

Since the ink ejection process by the printing unit 30 by the inkjet printing device 100 on which the sheet transport device 1 is mounted is the same as the processing content of the conventional device, the description thereof will be omitted.

First, when a printing job using A4 paper as the paper size is started, the control unit 70 moves the suction means 5 relative to the width dimension of the paper P. As a result, the partition plate 5c moves so as to match the width dimension of the paper P when the A4 paper is conveyed in the vertical direction on the belt surface 4a.

Then, when the print job is executed, air is sucked from the intake area E1 which is the passing area of the A4 paper to be conveyed, the paper P is sucked and sucked, and the intake area E1 is sucked from the exhaust area E2 which is the non-passing area of the A4 paper. Exhaust the air sucked in. As a result, the ink mist generated during ink ejection does not adhere to the non-passing area of the A4 paper on the belt surface 4a.

Next, when the printing job using A4 paper is completed and then the printing job using A3 paper is executed, the suction means 5 is first moved relative to the width dimension of the paper P. As a result, the partition plate 5c moves so as to match the width dimension of the paper P when the A3 paper is conveyed in the vertical direction on the belt surface 4a.

Then, when the print job is executed, air is sucked from the intake area E1 which is the passing area of the A3 paper to be conveyed, the paper P is sucked and sucked, and the intake area E1 is sucked from the exhaust area E2 which is the non-passing area of the A3 paper. Exhaust the air sucked in.

At this time, the A3 paper is conveyed, but since the intake area E1 was set according to the width dimension of the A4 paper at the time of the previous printing job, the ink mist generated during printing adheres to the exhaust area E2 of the belt surface 4a. Absent. Therefore, even if the print job shifts to a larger paper size such as A4 paper → A3 paper, stains due to ink mist do not adhere to the back surface of the A3 paper.

As described above, in the seat transport device 1 described above, in order to separate the intake area E1 and the exhaust area E2 set on the belt surface 4a, the intake air is taken by the pair of suction means 5 in which the intake ports 5a are arranged so as to face each other. A partition plate 5c is installed on the side of the mouth 5a, and a sorting means 6 is provided immediately below the belt surface 4a of the suction transport belt 4 so that one or both of them can move relative to each other in the width direction according to the width dimension of the paper P. There is.

As a result, the intake area E1 and the exhaust area E2 are separated on the belt surface 4a for each print job according to the width dimension of the paper P. Therefore, for example, a print job using a small size paper P (A4 paper) is used. Therefore, even when the job shifts to the printing job using the large size paper P (A3 paper), it is possible to reduce the adhesion of ink mist to the non-passing area of the belt surface 4a, so that the previous printing can be performed. Ink stains do not adhere to the back surface of A3 paper, which is larger in width than the paper P used in the job.

Further, since the non-passing area of the paper P is the exhaust area E2, the effect of preventing the ink mist generated at the time of ink ejection due to the exhausted air from adhering to the belt surface 4a is obtained.

[About other embodiments]
The present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented according to the usage environment and the like as shown below. Further, the following modified examples can be carried out in any combination within a range that does not deviate from the gist of the present invention.

In the above-described embodiment, the partitioning means 6 has been described with a pair of suction means 5 movable below the belt surface 4a along the width direction of the paper P and a partition plate 5c, but the present invention is limited to this. Not done.

For example, as shown in FIG. 5A, as another configuration example of the sorting means 6, the partition plate 5c is installed on the back surface side of the belt surface 4a so as to be relatively movable in the width direction, and below the belt surface 4a. It is also possible to have a configuration in which each upper portion of the suction means 5 fixedly arranged at a predetermined interval is connected via a bellows-shaped connecting member 5d. In this embodiment, the partition plates 5c may be moved so that the spacing between the partition plates 5c matches the width dimension of the paper P.

Further, in the above-described embodiment, the air exhausted from the exhaust area E2 disturbs the airflow in the space between the printing unit 30 and the sheet transporting device 1, and the ink ejected during the printing process is correctly applied to the printing surface of the paper P. If the printed image is distorted without landing, as shown in FIG. 5 (b), the width direction of the partition plate 5c for separating the intake area E1 and the exhaust area E2 of the belt surface 4a is outward. 5c may be further added so that a non-ventilated area E3 in which air is not sucked or exhausted is provided between the intake area E1 and the exhaust area E2 on the belt surface 4a.

Since the non-ventilated area E3 is set along the transport direction so that the passing area and the non-passing area of the paper P on the belt surface 4a are separated by a predetermined range without being adjacent to each other, the non-ventilated area E3 is set from the exhaust area E2. The turbulence of the airflow in the space is suppressed by the exhausted air, and the deviation of the landing position of the ink droplets (disturbance of the printed image) due to the turbulence of the airflow can be prevented.

1 ... Sheet transfer device 2 ... Drive roller 3 ... Driven roller 4 ... Suction transfer belt (4a ... Belt surface, 4b ... Vent hole)
5 ... A pair of suction means (5a ... suction port, 5b ... exhaust port, 5c ... dividing member (partition plate), 5d ... guide member (rail), 5e ... connecting member)
6 ... Sorting means 10 ... Feeding unit 20 ... Conveying unit 30 ... Printing unit 40 ... Paper ejection unit 50 ... Inverting unit 60 ... Storage unit 70 ... Control unit 80 ... Setting display unit 90 ... Image reading unit 100 ... Inkjet printing device P … Paper (sheet) used as a recording medium
E1 ... Intake area E2 ... Exhaust area E3 ... Non-ventilated area

Claims (4)

An endless suction transport belt with multiple vents and
A suction means that sucks air from the back surface side of the suction transport belt through the ventilation hole and sucks and holds the sheet on the surface of the suction transport belt.
In the sheet transfer device equipped with
The passing area of the sheet on the belt surface of the suction transport belt is defined as the intake area of the suction means, and the non-passing area of the sheet on the suction transport belt is defined as the exhaust area of the suction means.
A seat transporting device comprising a sorting means for classifying each area by adjusting the intake area or the exhaust area according to a seat width orthogonal to the seat transport direction of the seat. An endless suction transport belt with multiple vents and
A suction means that sucks air from the back surface side of the suction transport belt through the ventilation hole and sucks and holds the sheet on the surface of the suction transport belt.
In the sheet transfer device equipped with
The suction transport belt is a single belt in which a plurality of the vent holes are provided along the transport direction and the width direction.
When the passing area of the sheet on the belt surface of the suction transport belt is used as the intake area of the suction means, and the non-passing area of the sheet on the suction transport belt is used as the exhaust area of the suction means.
It is provided with a dividing means for dividing each area by adjusting the intake area or the exhaust area according to the seat width of the seat.
It said suction means to draw only the lower part of the intake area of the suction conveyor belt which is divided by the division means, the sheet conveying apparatus characterized by being movable in the width direction. The sorting means is characterized by including a pair of partition plates whose spacing can be adjusted so that the intake area and the exhaust area are separated according to the seat width of the sheet on the back surface side of the suction transfer belt. The sheet transport device according to claim 1 or 2. The sheet transport according to any one of claims 1 to 3 , wherein the sorting means forms a non-ventilated area that is not sucked or exhausted by the suction means between the intake area and the exhaust area. apparatus.

Images