JP4152252B2 - Sheet transport device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet conveying apparatus such as a copying apparatus or a printer apparatus that conveys a sheet such as a recording sheet to a conveying path provided therein and performs processing such as printing on the sheet.
[0002]
[Prior art]
In copy machines, printers, and facsimile machines that transport recording paper to an internal transport path and perform processing such as image recording, sorting, and stapling on the recording paper, processing continues efficiently. Therefore, it is necessary to accurately control the processing timing for the recording paper being conveyed and the timing for conveying the recording paper conveyed before and after the processing. These devices include a sheet sensor that detects the presence of a recording sheet in the middle of the conveyance path, and the current recording sheet is conveyed along the conveyance path depending on the position at which the sheet sensor detects the recording sheet and the time from the point of detection. Is determined, and the timing of a predetermined process such as image recording is controlled based on the time point when the paper sensor at the predetermined position detects the recording paper. When controlling the processing timing based on the time when the leading edge of the recording paper is detected by the paper sensor, the processing should be performed after a certain time from the detection of the leading edge of the recording paper, regardless of the size of the recording paper. Thus, it is possible to control the timing of processing performed from the front of the recording paper such as image recording. Some apparatuses control the processing timing by performing processing after a predetermined time from the detection of the trailing edge of the recording paper with reference to the time point when the paper sensor detects the trailing edge of the recording paper. The paper sensor is mainly a sensor that uses a lever-type detection piece, and detects that the detection piece that detects the leading edge of the recording paper is pushed by the leading edge of the recording paper and tilts to detect the leading edge of the recording paper. Is detected, and the trailing edge of the recording sheet is detected by detecting that the trailing edge of the recording sheet is separated from the detection piece and the inclination of the detection piece is restored. The conveyance path provided in the apparatus is curved so that a long conveyance path can be accommodated in the apparatus, and the detection sensor detects the leading and trailing edges of the recording paper according to the curve of the designed conveyance path. It is set to detect whichever is easier to detect.
[0003]
[Patent Document 1]
JP-A-6-115788
[0004]
[Problems to be solved by the invention]
With the diversification of usage forms of printer devices and the like, opportunities to use recording paper other than plain paper such as recycled paper, cardboard, and special recording paper are increasing, and various types of recording paper are used in copying machines and printer devices. It is used in such devices. In addition, there are increasing opportunities to use recording sheets other than paper, such as transparent sheets. The leading edge and the trailing edge of the recording paper conveyed in the curved conveyance path draw different trajectories depending on the type of the recording paper. For example, a stiff recording paper having a repulsive force, such as thick paper, is conveyed while rubbing the conveyance path against the curvature of the conveyance path, and a soft recording sheet is conveyed along the inside of the conveyance path. For this reason, when recording paper other than plain paper is used, the timing at which the leading edge of the recording paper contacts the detection piece or the timing at which the trailing edge of the recording paper moves away from the detection piece depending on the type of recording paper is used. Unlike the case where the paper is designed so that the most commonly used plain paper is easily detected by the paper sensor, the accuracy of detecting the recording paper other than the plain paper in the transport path and controlling the processing timing is inferior. There is a problem. In addition, there are increasing opportunities to use non-standard recording paper such as A4 or B5, and the length from the leading edge to the trailing edge of the non-standard recording paper is not predetermined. However, there is a problem in that the processing timing for the recording paper cannot be controlled.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to detect the leading edge of a sheet as a reference for controlling the timing of a predetermined process for a sheet such as recording paper. An object of the present invention is to provide a sheet conveying apparatus such as a printer apparatus that can control the processing timing with high accuracy by selecting the one that is easier to control according to the type of the sheet between the time when the trailing edge is detected and the time when the trailing edge of the sheet is detected. .
[0006]
Another object of the present invention is to control the processing timing of an irregular sheet with high accuracy by controlling the timing of processing for the irregular sheet based on the time point when the trailing edge of the sheet is detected. An object of the present invention is to provide a controllable sheet conveying apparatus.
[0007]
[Means for Solving the Problems]
The sheet conveying apparatus according to the present invention has a detection unit that detects a sheet in the middle of a conveyance path for conveying a sheet, and a time point when the detection unit detects the leading edge or the trailing edge of the sheet. Change the conveyance direction of the sheet being conveyed Means for recording an image on a sheet in a sheet conveying apparatus comprising a control means for controlling processing timing; Hardness is different A means for classifying and storing a plurality of types of sheets, a selection means for selecting a sheet on which an image is to be recorded from a plurality of types of sheets stored by the means, and the control means controls the timing of the processing. As a reference for this, either the time point when the detection means detects the leading edge of the sheet or the time point when the trailing edge of the sheet is detected is set according to the type of sheet selected by the selection means In particular, when the sheet selected by the selection unit is cardboard, the time point when the detection unit detects the trailing edge of the sheet is set as the reference. And means for performing.
[0008]
The sheet conveying apparatus according to the present invention has a detection unit that detects a sheet in the middle of a conveyance path for conveying a sheet, and a time point when the detection unit detects the leading edge or the trailing edge of the sheet. Change the conveyance direction of the sheet being conveyed Means for recording an image on a sheet in a sheet conveying apparatus comprising a control means for controlling processing timing; Hardness is different Corresponding to each of information indicating a plurality of types of sheets, when the control unit detects the leading edge of the sheet and when the trailing edge of the sheet is detected as a reference for controlling the processing timing Means for storing prescribed information that defines which one to use; Hardness is different A means for classifying and storing a plurality of types of sheets, a selection means for selecting a sheet on which an image is to be recorded from a plurality of types of sheets stored by the means, and a type of the sheet selected by the selection means And means for setting the reference in accordance with prescribed information stored in association with information indicating the determined sheet type.
[0010]
The sheet conveying apparatus according to the present invention is Selected by the selection means In the case where the sheet is determined to be a sheet having an irregular size other than a predetermined fixed size, it further includes means for selecting a time point when the detection means detects the trailing edge of the sheet as the reference. It is characterized by that.
[0012]
In the present invention, a sheet such as recording paper is used in a sheet conveying apparatus having a conveying path inside. The transport direction of In order to control the timing of processing, it is selected according to the type of the sheet whether to use the time point when the leading edge of the sheet is detected at a predetermined position or the time point when the trailing edge of the sheet is detected as a reference. The sheet conveying apparatus is an image forming apparatus provided with means for forming an image and recording it on a sheet, such as a printer apparatus or a facsimile apparatus.
[0013]
In the present invention, in association with information indicating the type of sheet, Change the sheet transport direction Storing prescribed information that determines whether the reference for controlling the processing timing is the time when the leading edge of the sheet is detected or the time when the trailing edge of the sheet is detected; A type of a sheet to be conveyed such as a recording sheet designated by a user is determined, and which one is used as the reference is selected according to the regulation information relating to the determined type of sheet.
[0015]
Further, in the present invention, for an irregular sheet, the timing for changing the transport direction cannot be controlled in consideration of the length of the sheet. Therefore, the reference is set at the time when the trailing edge of the sheet is detected. Then, the conveyance direction is changed at a fixed timing based on the time.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
FIG. 1 is a cross-sectional view of a printer apparatus which is a sheet conveying apparatus of the present invention. The printer apparatus 1 is a sheet conveying apparatus of the present invention, and is an image forming apparatus that receives an image output instruction from the outside and records and outputs an image on a recording sheet that is a sheet according to the present invention. The printer apparatus 1 includes a photosensitive drum 181, a charging member 182 that charges the photosensitive drum 181, a laser beam scanning unit 183 that writes a latent image on the charged photosensitive drum 181, and a latent image on the photosensitive drum 181. A developing unit 184 for transferring the developed image onto the recording paper, a fixing unit 186 for fixing the image transferred onto the recording paper, and a cleaning for removing the developer remaining on the photosensitive drum 181. An image forming unit composed of the unit 187 is provided inside. The printer apparatus 1 includes a plurality of paper feed trays 21, 21,... That separately store a plurality of types of recording paper below the image forming unit. The paper feed trays 21, 21,... Store the recording sheets classified according to the type, and can sequentially feed the stored recording sheets as necessary. A first transport path 22 is provided from each of the paper feed trays 21, 21,... To between the photosensitive drum 181 and the transfer unit 185, and is sent out from each of the paper feed trays 21, 21,. The recording sheet is guided between the photosensitive drum 181 and the transfer unit 185 through the first conveyance path 22. The first transport path 22 is provided so as to be connected to the outside from the transfer unit 185 through the fixing unit 186, and further, on the downstream side of the fixing unit 186 and the upstream side of the transfer unit 185 in the first transport path 22. A second transport path 23 to be connected is provided substantially in equilibrium with the first transport path 22. The second transport path 23 is used when performing a process of temporarily changing the transport direction of the recording paper that has passed through the fixing unit 186 and returning it between the photosensitive drum 181 and the transfer unit 185 in order to perform duplex printing. The
[0018]
FIG. 2 is an enlarged cross-sectional view of the vicinity of the discharge port from which the recording paper is discharged. A discharge port roller 25 is provided at the discharge port, and a branch point where the second transfer route 23 branches from the first transfer route 22 exists on the upstream side of the discharge port roller 25. Further, a paper sensor 24 which is a detecting means according to the present invention for detecting the passage of the recording paper is provided further upstream from the branch point. The paper sensor 24 is composed of a lever that is pushed and tilted by the recording paper passing through the position of the paper sensor 24, and a transmission type optical sensor that detects whether the lever is tilted by using light shielding by the lever. The leading edge of the recording sheet is detected by detecting that the lever that has not been tilted is tilted, and the trailing edge of the recording sheet is detected by detecting that the tilted lever returns to the original position. The printer apparatus 1 detects the passage of the recording sheet by the sheet sensor 24, reverses the discharge roller 25 at a predetermined timing, changes the recording sheet conveyance direction, and sends the recording sheet to the second conveyance path 23. be able to. Note that other detection means such as a reflective optical sensor may be used as the paper sensor 24.
[0019]
FIG. 3 is a block diagram illustrating a configuration of a printer apparatus which is a sheet conveying apparatus of the present invention. The printer apparatus 1 is a sheet conveying apparatus according to the present invention, and includes a control unit 11 including a CPU that performs calculation and a RAM that stores temporary information associated with the calculation. The control unit 11 controls the printer apparatus 1. A ROM 15 storing a control program for performing the above is connected, and the control unit 11 controls the entire printer apparatus 1 according to the control program stored in the ROM 15. The control unit 11 is connected to a management unit 14 that is a memory for storing management information for managing processing performed by the printer apparatus 1. The control unit 11 is managed by the management unit 14. Information is referred to, and the printer apparatus 1 is controlled based on the referred information. Further, the control unit 11 scans and reads an image recorded on the recording paper, generates an electronic image data based on the read image, and forms and records an image from the image data. An image forming unit 18 for recording on paper is connected, and the printer device 1 functions as a copying device for copying an image read by the image reading unit 17. The control unit 11 is connected to a storage unit 16 formed of a hard disk or a nonvolatile memory, and the storage unit 16 stores image data. The control unit 11 is connected to an operation unit 12 that receives an operation from a user. The operation unit 12 includes a display unit such as a liquid crystal panel that displays information necessary for the operation, and a user's operation. It consists of an input means such as a touch panel or a numeric keypad for inputting information such as control commands by operation. A paper sensor 24 is connected to the control unit 11, and the control unit 11 controls the timing of processing such as image output based on the time point when the paper sensor 24 detects the leading edge or the trailing edge of the recording paper. To do.
[0020]
Further, a communication unit 13 connected to an external communication network N1 such as a LAN is connected to the control unit 11, and the communication unit 13 exchanges information with the outside via the communication network N1. . A plurality of PCs 3, 3,... Are connected to the communication network N1, the communication unit 13 receives the image data transmitted from the PC 3 via the communication network N1, and the image forming unit 18 includes the communication unit 13. Can form and output an image from the received image data, and the printer apparatus 1 functions as a network printer. In addition, the printer device 1 can transmit image data generated by the image reading unit 17 by reading an image from the communication unit 13 to the PC 3 via the communication network N1, and functions as a network scanner. Further, the communication unit 103 can perform facsimile communication, and the image data generated by the image reading unit 17 reading the image via the public line network N2 connected to the communication network N1 is used as the public line network. The image data can be transmitted to another facsimile apparatus 4 connected to N2 by facsimile communication, and image data transmitted from the facsimile apparatus 4 by facsimile communication is received via the public network N2, and the image forming unit 18 Can form and output an image from the image data received by the communication unit 13, and the printer apparatus 1 functions as a facsimile apparatus.
[0021]
The management unit 14 defines the setting information indicating the timing of performing the process of changing the conveyance direction of the recording sheet being conveyed, and the setting information indicating the setting of the recording sheet stored in each of the paper feed trays 21, 21,. Is remembered. FIG. 4 is a conceptual diagram illustrating an example of the contents of the regulation information. As a reference for controlling the processing timing for recording sheets of a standard size such as A3, A4, B5, etc., the point in time when the leading edge of the recording paper is detected is associated. Is associated with a point in time when the trailing edge of the recording sheet is detected as a reference for controlling the processing timing. The process of changing the conveyance direction of the recording sheet being conveyed needs to be performed at a timing immediately after the trailing edge of the recording sheet passes through the branch point between the first conveyance path 22 and the second conveyance path 23. The recording paper associated with the time when the trailing edge is detected as a reference for controlling the processing timing is the time when the trailing edge passes the branch point from the time when the trailing edge of the recording paper is detected by the paper sensor 24. Since the time up to is constant regardless of the type of recording paper, it is set to perform processing after a certain time a seconds from the time when the trailing edge is detected. In addition, the recording paper associated with the time point when the leading edge is detected as a reference for controlling the processing timing, the time from the time when the leading edge is detected until the time when the trailing edge passes the branch point depends on the size of the recording paper. Because of the difference, the timing is set so that the processing is performed at the timing corresponding to the size of each recording sheet from the time when the leading edge is detected. The contents of the setting information are determined in advance according to the design of the printer device 1 such as the shape of the first transport path 22 and the position of the paper sensor 24, and are stored in the management unit 14 when the printer device 1 is manufactured. Remembered.
[0022]
FIG. 5 is a conceptual diagram showing an example of the contents of the setting information. For each of the paper feed trays 21, 21,..., The type and size of recording paper such as plain paper or thick paper is set, and whether or not the recording paper has a distinction between front and back is set, and duplex printing is performed. It is set whether or not each process of stapling and punching can be performed. Further, a printer process for outputting an image based on the image data transmitted from the PC 3, a copy process for outputting an image based on the image data read by the image reading unit 17, and a facsimile communication via the public network N2. Facsimile processing for outputting an image based on the received image data, Internet facsimile processing for outputting an image based on image data received via the Internet (not shown) connected to the communication network N1, and the storage unit 16 Whether or not the recording paper stored in each paper feed tray 21 can be used is set for any of the document filing processes for outputting an image based on the image data stored therein.
[0023]
6 and 7 are schematic diagrams illustrating an example of input display on the operation unit 12 that is output for the user to input setting information. The user operates the operation unit 12 to call up a user setting screen as shown in FIG. From the user setting screen, it is possible to perform settings such as screen contrast setting and facsimile communication partner registration. By specifying the paper feed tray setting on the screen, as shown in FIG. For each paper feed tray, a paper feed tray setting screen is called up. On the paper tray setting screen, various settings to be recorded in the setting information can be input. The input information is recorded in the setting information and stored in the management unit 14. By specifying the type and size setting buttons for which “plain paper / A4” is set in FIG. 6B, a recording paper type setting screen as shown in FIG. 6C is called. On the type setting screen, the type of recording paper such as plain paper, printed recording paper, and recycled paper can be specified. By specifying one of the types, the recording paper type is set, and then the storage recording paper size setting screen is called up as shown in FIG. On the size setting screen, by specifying the auto-inch system or the auto-AB system, it is possible to set a recording paper having a fixed size defined by the inch system or AB system. Also, the size of the recording paper can be freely set by designating the size input. At this time, as shown in FIG. 7B, when the AB system is designated, the recording paper size is designated in mm, and as shown in FIG. 7C, when the inch system is designated, recording is performed in inches. The paper size is specified.
[0024]
FIG. 8 is a flowchart showing a procedure for copying on both sides of a recording sheet performed by the printer apparatus 1 which is a sheet conveying apparatus of the present invention. The control unit 11 of the printer apparatus 1 reads the image at the copy source by the image reading unit 17 (S1), and stores the image data generated by reading the image in the storage unit 16. Next, according to the control program stored in the ROM 15, the control unit 11 monitors the reception of designation of the paper feed tray 21 by the operation of the user at the operation unit 12 (S 2), and designates the paper feed tray 21. If it is received (S2: YES), the designated paper feed tray 21 is selected as the paper feed tray 21 from which the recording paper for recording the image is taken out (S3). When the designation of the paper feed tray 21 is not accepted (S2: NO), the control unit 11 performs image size such as enlargement or reduction by the user's operation on the operation unit 12 according to the control program stored in the ROM 15. When the change of the image size is accepted (S4: YES), the recording paper of the changed size is used as the paper feed tray 21 for taking out the recording paper for recording the image. If it is accommodated, the paper feed tray 21 recorded in the setting information is selected (S3). When the change of the image size is not accepted (S4: NO), the control unit 11 reads the read image as the paper feed tray 21 for taking out the recording paper for recording the image in accordance with the control program stored in the ROM 15. If a recording sheet matching the size is stored, the sheet feeding tray 21 recorded in the setting information is selected (S5). For example, when the size of the read image is A4, the tray 1 is selected in the setting information example shown in FIG. After selecting the paper feed tray 21 in step S3 or step S5, the control unit 11 sets the selected paper feed tray 21 from the setting information stored in the management unit 14 according to the control program stored in the ROM 15. Information on the type of recording paper recorded in association is read out to determine the type of recording paper to be used (S6), and the management unit 14 records the information in association with the type of recording paper read out. In accordance with the specified information, a reference for controlling the timing of the processing for changing the conveyance direction of the recording paper and a timing for how many seconds after the reference to perform the processing are set (S7). For example, when the tray 1 is selected in the example of the setting information shown in FIG. 5 and the example of the regulation information shown in FIG. 4 is followed, the reference for controlling the processing timing is the time when the leading edge of the recording paper is detected. The processing timing is set c seconds after the leading edge of the recording sheet is detected. Further, when the tray 4 is selected in the setting information example shown in FIG. 5, since the thick paper is stored in the tray 4, the reference for controlling the processing timing is the rear end of the recording paper. Is set at the time point when the image is detected, and the processing timing is set a seconds after the time point when the trailing edge of the recording sheet is detected.
[0025]
Next, the control unit 11 starts image output processing according to the control program stored in the ROM 15, and feeds the recording paper from the selected paper feed tray 21 to the first transport path 22 (S8). Then, the image forming unit 18 prints an image on a recording sheet (S9). 9 and 10 are schematic diagrams illustrating processing for changing the conveyance direction of the recording paper. FIG. 9 shows the case where the reference for controlling the processing timing is the time when the leading edge of the recording paper is detected, and FIG. 10 shows the case where the reference for controlling the processing timing detects the trailing edge of the recording paper. In some cases, the arrows in the figure indicate the conveyance direction of the recording paper. The control unit 11 monitors whether the paper sensor 24 detects the leading edge or the trailing edge of the recording paper that has passed through the fixing unit 186 according to the set reference according to the control program stored in the ROM 15 (S10). If not detected (S10: NO), monitoring of detection is continued. As shown in FIG. 9A, when the paper sensor 24 detects the leading edge of the recording paper in a state where the reference for controlling the processing timing is set at the time when the leading edge of the recording paper is detected, When the paper sensor 24 detects the trailing edge of the recording paper in a state where the reference for controlling the timing of the recording paper is set at the time when the trailing edge of the recording paper is detected (S10), the control unit 11 reads the ROM 15 into the ROM 15. According to the stored control program, a time is waited from the detected time for the time set as the processing timing (S11). While waiting for this time, the recording sheet is continuously conveyed in the first conveying path 22, and the trailing edge of the recording sheet is connected to the first conveying path 22 and the first conveying path 22 as shown in FIGS. 9B and 10B. 2 near the branch point with the transport path 23. When the waiting time is over, the control unit 11 reversely rotates the discharge port roller 25 according to the control program stored in the ROM 15 to change the recording paper conveyance direction (S12), and FIG. As shown in FIG. 10 (c), the recording paper is sent to the second transport path 23, and the recording paper is sent again to the first transport path 22 on the upstream side of the transfer unit 185. The image is printed (S13), and the recording paper with the image copied on both sides is discharged. Next, in accordance with the control program stored in the ROM 15, the control unit 11 determines whether or not all of the image output has been completed (S 14). (S14: NO), the process returns to step S8 to repeat the image output process. If all the image output has been completed (S14: YES), the process ends.
[0026]
In the above-described processing, an example of performing processing for selecting a reference for controlling processing timing when performing copying processing has been described, but processing for receiving image data from the PC 3 and outputting an image, or Even when processing for receiving image data and outputting an image by facsimile communication is performed, the printer apparatus 1 performs processing for selecting the reference.
[0027]
As described above in detail, the printer apparatus which is the sheet conveying apparatus of the present invention uses the time point when the leading edge of the recording paper is detected as a reference for controlling the timing of changing the conveying direction of the recording paper as the sheet. Or the time when the trailing edge of the recording paper is detected as a reference is recorded in the regulation information corresponding to the type of the recording paper, and when the recording paper is used, the processing is performed according to the regulation information. The reference for controlling the timing is selected according to the recording paper to be used, and processing is performed. This makes it possible to select an appropriate standard that facilitates control of processing according to differences in the size, thickness, stiffness, etc. of the recording paper, and whichever of the multiple types of recording paper is used. Even in this case, the processing timing can be controlled with high accuracy. In addition, for recording paper of an irregular size that deviates from the standard size, the time point at which the trailing edge of the recording paper is detected is selected as a reference for controlling the timing of processing for changing the conveyance direction of the recording paper. By performing the processing after a predetermined time from the detection of the rear end, it is possible to control the processing timing with stable accuracy.
[0028]
In the present embodiment, an example in which recording paper is used as a sheet has been shown. However, the present invention is not limited to this, and a form using a sheet other than paper such as a plastic sheet such as a transparency sheet, a vinyl sheet, or a cloth. It may be. In addition, as an example of processing for selecting a reference for controlling timing, an example of processing for changing the conveyance direction of a recording sheet has been described. However, the present invention is not limited to this, and printing start, paper folding, stapling, etc. For other processes, the reference for controlling the timing may be similarly selected according to the type of sheet.
[0029]
Furthermore, in the present embodiment, the sheet conveying apparatus of the present invention is a multi-function apparatus having a plurality of functions such as a printer apparatus, a copying apparatus, and a facsimile apparatus. However, the present invention is not limited to this. The sheet conveying apparatus of the present invention may be a single-function apparatus such as only a printer apparatus, only a copying apparatus, and only a facsimile apparatus.
[0030]
【The invention's effect】
In the present invention, a sheet is conveyed by a sheet conveying apparatus having a conveying path inside. The transport direction of In order to control the timing of processing, whether the time point when the leading edge of the sheet is detected at a predetermined position or the time point when the trailing edge of the sheet is detected is used as a reference, depending on the type of sheet used By selecting, it is possible to select the appropriate standard that facilitates control of processing according to differences in size, thickness, hardness, etc., when using any of multiple types of recording paper However, the processing timing can be controlled with high accuracy.
[0031]
In the present invention, for the process of changing the sheet conveyance direction, such as during duplex printing, by selecting the reference, the conveyance direction is changed smoothly according to the sheet type, and the type of recording paper Regardless of this, the processing timing can be controlled with stable accuracy.
[0032]
Further, in the present invention, for an irregular sheet, the time point at which the trailing edge of the recording sheet is detected is selected as a reference for controlling the timing of changing the conveyance direction of the recording sheet. By performing the processing after a predetermined time from the detection, the processing timing can be controlled with stable accuracy.
[0033]
Furthermore, the sheet conveying apparatus of the present invention is an image forming apparatus such as a printer apparatus or a copying apparatus, and can control the timing of processing performed by the image forming apparatus with stable accuracy regardless of the type of recording paper used. The present invention has an excellent effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a printer apparatus which is a sheet conveying apparatus of the present invention.
FIG. 2 is an enlarged cross-sectional view of the vicinity of a discharge port through which recording paper is discharged.
FIG. 3 is a block diagram illustrating a configuration of a printer apparatus that is a sheet conveying apparatus of the present invention.
FIG. 4 is a conceptual diagram illustrating an example of contents of regulation information.
FIG. 5 is a conceptual diagram illustrating an example of the contents of setting information.
FIG. 6 is a schematic diagram illustrating an input display example on the operation unit, which is output for the user to input setting information.
FIG. 7 is a schematic diagram illustrating an example of an input display on an operation unit that is output for a user to input setting information.
FIG. 8 is a flowchart illustrating a procedure of a copying process on both sides of a recording sheet performed by a printer that is a sheet conveying apparatus of the present invention.
FIG. 9 is a schematic diagram illustrating processing for changing the conveyance direction of a recording sheet.
FIG. 10 is a schematic diagram illustrating processing for changing the conveyance direction of a recording sheet.
[Explanation of symbols]
1 Printer device (sheet transport device)
11 Control unit
14 Management Department
18 Image forming unit
21 Paper tray
22 First transport path
23 Second transport path
24 Paper sensor (detection means)
25 Discharge roller
3 PC
N1 communication network

Claims (3)

Control means for detecting the sheet in the middle of the conveyance path for conveying the sheet, and timing of processing for changing the conveyance direction of the sheet being conveyed with reference to the time when the detection means detects the leading edge or the trailing edge of the sheet A sheet conveying apparatus comprising a control means for
Means for recording an image on a sheet;
It means for stiffness is accommodated classify different types of sheets,
Selecting means for selecting a sheet on which an image is to be recorded from among a plurality of types of sheets stored in the means;
As a reference for the control means to control the timing of the processing, either the time point when the detection means detects the leading edge of the sheet or the time point when the trailing edge of the sheet is detected is determined for the sheet selected by the selection means. Setting according to the type, and in particular, when the sheet selected by the selection unit is thick paper, the reference unit includes a unit for setting a time point when the detection unit detects the trailing edge of the sheet. Sheet conveying device. Control means for detecting the sheet in the middle of the conveyance path for conveying the sheet, and timing of processing for changing the conveyance direction of the sheet being conveyed with reference to the time when the detection means detects the leading edge or the trailing edge of the sheet A sheet conveying apparatus comprising a control means for
Means for recording an image on a sheet;
The control means detects the leading edge of the sheet and the trailing edge of the sheet as a reference for the control means to control the timing of the processing in association with information indicating the types of sheets having different stiffnesses. Means for storing prescribed information that defines which one to use when detecting
It means for stiffness is accommodated classify different types of sheets,
Selecting means for selecting a sheet on which an image is to be recorded from among a plurality of types of sheets stored in the means;
Means for determining the type of sheet selected by the selection means;
A sheet conveying apparatus comprising: means for setting the reference in accordance with prescribed information stored in association with information indicating the determined sheet type. When it is determined that the sheet selected by the selection unit is a sheet having an irregular size other than a predetermined standard size, the time point when the detection unit detects the trailing edge of the sheet as the reference. sheet conveying apparatus according to claim 1 or 2, further comprising a means for selecting.

Images