JP2016224300A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of reducing the incorrect operation of a user in sheet jam release.SOLUTION: The printer comprises: a sheet feeding part 2 which conveys a sheet along a conveyance path; a conveyance printing part 3; an upper surface conveyance part 4; a sheet discharge part 5; a reversing part 6; a sheet jam release history table 71 which holds for each user the incorrect operation rate at each sheet jam release operation position in the sheet jam release operation after sheet jam occurrence in the conveyance path; a display part 61; and a control part 9 which performs, when there is a residual sheet corresponding to the sheet jam release operation position having the incorrect operation rate of the user performing the sheet jam release operation equal to or greater than a threshold in the sheet jam occurrence, control so as to perform sheet jam release guide display emphasizing the sheet jam release operation position more than other sheet jam release operation positions on the display part 61.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a printing apparatus that performs printing on paper.

  2. Description of the Related Art Printing apparatuses that perform printing while transporting paper are known. In such a printing apparatus, a paper jam may occur during the conveyance of the paper.

  When a paper jam occurs in the printing apparatus, the paper conveyance is stopped. As a result, the paper that was being conveyed when the paper jam occurred remains in the apparatus. The paper remaining in the apparatus is removed by a paper jam release operation by the user (for example, see Patent Document 1). At this time, in order to facilitate the user's operation of clearing paper jam, a paper jam clearing method is widely displayed on the screen.

JP 2012-111624 A

  However, even if the paper jam release method is displayed on the screen, the user may make a mistake in the paper jam release operation. If the user makes an operation mistake, the apparatus may be damaged, or the paper may be torn and the fragments may remain in the apparatus.

  The present invention has been made in view of the above, and an object of the present invention is to provide a printing apparatus that can reduce a user's erroneous operation when a paper jam is cleared.

  In order to achieve the above object, a first feature of a printing apparatus according to the present invention includes a transport unit that transports paper along a transport path, and paper jam release in a paper jam release operation after occurrence of paper jam in the transport path. Corresponds to the paper jam clearing operation position where the erroneous operation rate of the user who performs the paper jam clearing operation exceeds the threshold when the paper jam occurs. When there is a remaining sheet to be printed, the display unit is provided with a control unit that controls the paper jam release operation position so that the paper jam release operation position is more important than the other paper jam release operation positions.

  A second feature of the printing apparatus according to the present invention is that the control unit resets an erroneous operation rate of the user with respect to a paper jam release operation position where a correct paper jam release operation has been performed continuously by the same user more than a specified number of times. There is.

  A third feature of the printing apparatus according to the present invention is that a transport unit that transports paper along a transport path, and an average operation time for each paper jam release operation position in a paper jam release operation after the paper jam has occurred in the transport path. A paper jam release history table for each user, a display unit, and a remaining paper corresponding to the paper jam release operation position where the average operation time of the user who performs the paper jam release operation exceeds a specified time when a paper jam occurs. In some cases, the display unit is provided with a control unit that controls to perform a paper jam release guide display that places more importance on the paper jam release operation position than other paper jam release operation positions.

  A fourth feature of the printing apparatus according to the present invention is that the control unit performs an average operation of the user with respect to a paper jam clearing operation position where the paper jam clearing operation has been performed by the same user for a predetermined number of times or more and less than a predetermined time. The time is to reset.

  According to the first feature of the printing apparatus according to the present invention, when there is a residual paper corresponding to a paper jam clearing operation position in which the erroneous operation rate of the user who performs the paper jam clearing operation is equal to or greater than a threshold, the control unit displays on the display unit. Control is performed so as to perform a paper jam release guide display in which the paper jam release operation position is more important than other paper jam release operation positions. This makes it possible to impress the user with an accurate paper jam clearing operation method at the paper jam clearing operation position that is easy for the user to make an erroneous operation. As a result, it is possible to reduce a user's erroneous operation at the time of paper jam release.

  According to the second feature of the printing apparatus according to the present invention, the control unit resets the erroneous operation rate of the user with respect to the paper jam clearing operation position where the correct paper jam clearing operation has been performed continuously by the same user more than a specified number of times. To do. Accordingly, it is possible to perform the paper jam release guide display that places more importance on the paper jam release operation position having a higher error operation rate than the paper jam release operation position that the user has mastered in the paper jam release operation.

  According to the third feature of the printing apparatus of the present invention, the control unit displays when there is a remaining paper corresponding to the paper jam release operation position where the average operation time of the user who performs the paper jam release operation is equal to or longer than the specified time. The paper jam release operation position is controlled so that the paper jam release operation position is more important than the other paper jam release operation positions. This makes it possible to impress the user with an accurate paper jam release operation method at the paper jam release operation position that is estimated to be difficult for the user to understand the paper jam release operation. As a result, it is possible to reduce a user's erroneous operation at the time of paper jam release.

  According to the fourth feature of the printing apparatus according to the present invention, the control unit is configured to determine the average of the user with respect to the paper jam clearing operation position where the paper jam clearing operation has been performed by the same user for a specified number of times continuously and less than the specified time. Reset the operation time. Accordingly, it is possible to perform the paper jam release guide display that places more importance on the paper jam release operation position where the average operation time is longer than the paper jam release operation position that the user has mastered in the paper jam release operation.

1 is a schematic configuration diagram of a printing apparatus according to a first embodiment. FIG. 2 is a control block diagram of the printing apparatus shown in FIG. 1. It is a figure which shows the paper jam cancellation | release log | history table in 1st Embodiment. 6 is a flowchart of a paper jam handling process in the first embodiment. It is a figure which shows a paper jam notification screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows a paper jam cancellation | release operation method screen. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. FIG. 6 is an explanatory diagram of a relationship between a change in ON / OFF of a paper sensor and a paper pulling direction. It is a figure which shows a paper jam cancellation | release operation method screen. It is a figure which shows the paper jam cancellation | release log | history table in 2nd Embodiment. 12 is a flowchart of a paper jam handling process in the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Throughout the drawings, the same or equivalent parts and components are denoted by the same or equivalent reference numerals.

  The following embodiment exemplifies an apparatus or the like for embodying the technical idea of the present invention. The technical idea of the present invention is based on the material, shape, structure, arrangement, etc. of each component. It is not specified to the following. The technical idea of the present invention can be variously modified within the scope of the claims.

(First embodiment)
FIG. 1 is a schematic configuration diagram of a printing apparatus according to the first embodiment of the present invention. FIG. 2 is a control block diagram of the printing apparatus shown in FIG. In the following description, the direction orthogonal to the paper surface of FIG. Also, the top, bottom, left, and right of the paper surface in FIG.

  In FIG. 1, a path indicated by a thick line is a conveyance path through which a sheet as a print medium is conveyed. Among the transport routes, a route indicated by a solid line is a normal route RC, a route indicated by a one-dot chain line is a reverse route RR, a route indicated by a broken line is a paper discharge route RD, and a route indicated by a two-dot chain line is a paper feed route RS. In the following description, upstream and downstream mean upstream and downstream in the transport path.

  As shown in FIGS. 1 and 2, the printing apparatus 1 according to the first embodiment includes a paper feeding unit 2, a transport printing unit 3, an upper surface transport unit 4, a paper discharge unit 5, a reversing unit 6, An operation panel 7, a storage unit 8, a control unit 9, and a housing 10 that stores or holds each unit are provided.

  The paper feeding unit 2 feeds the paper P to the transport printing unit 3. The paper feed unit 2 is arranged on the most upstream side of the transport path. The paper feed unit 2 includes an external paper feed stand 11, an external paper feed roller 12, internal paper feed stands 13A to 13C, internal paper feed rollers 14A to 14C, internal paper feed transport rollers 15A to 15D, and vertical transport. A roller 16, an external paper feed motor 17, an internal paper feed motor 18, and paper sensors 19A to 19J are provided. The paper feeding unit 2 constitutes a part of the conveying unit in the claims.

  The external paper feed tray 11 is for loading paper P used for printing. The external paper feed tray 11 is partly exposed outside the housing 10.

  The external paper feed roller 12 takes out the paper P stacked on the external paper feed tray 11 one by one and conveys the paper P toward the transport printing unit 3 along the paper feed path RS.

  The internal paper feed trays 13A to 13C are used to stack paper P used for printing. The internal paper feed trays 13 </ b> A to 13 </ b> C are disposed inside the housing 10.

  The internal paper feed rollers 14A to 14C take out the paper P one by one from the internal paper feed trays 13A to 13C, respectively, and transport the paper P toward the internal paper feed transport rollers 15A to 15D along the paper feed path RS. .

  The internal paper feed conveyance roller 15A conveys the paper P taken out from the internal paper feed tray 13A by the internal paper feed roller 14A toward the vertical conveyance roller 16 along the paper feed path RS. The internal paper feeding / conveying rollers 15B and 15C convey the paper P taken out from the internal paper feeding trays 13B and 13C by the internal paper feeding rollers 14B and 14C, respectively, toward the internal paper feeding / conveying roller 15D along the paper feeding path RS. To do. The internal paper feed transport roller 15D transports the paper P transported by the internal paper feed transport roller 15B or the internal paper feed transport roller 15C toward the vertical transport roller 16 along the paper feed path RS.

  The vertical conveying roller 16 conveys the paper P conveyed by the internal paper feeding / conveying roller 15A or the internal paper feeding / conveying roller 15D toward a registration roller 21 described later.

  The external paper feed motor 17 rotates the external paper feed roller 12 and the vertical conveyance roller 16. The external paper feed motor 17 is connected to the external paper feed roller 12 and the vertical transport roller 16 via a one-way clutch (not shown). As a result, the external paper feed roller 12 is rotationally driven by rotation of the external paper feed motor 17 in one direction, and the vertical transport roller 16 is rotationally driven by rotational drive of the external paper feed motor 17 in the other direction. .

  The internal paper feed motor 18 rotates and drives the internal paper feed rollers 14A to 14C and the internal paper feed transport rollers 15A to 15D. The internal paper feeding motor 18 can be connected / released to / from the internal paper feeding rollers 14A to 14C and the internal paper feeding / conveying rollers 15A to 15D via a clutch (not shown). The internal paper feed rollers 14A to 14C and the internal paper feed transport rollers 15A to 15D that are rotationally driven are switched by the clutch.

  The sheet sensors 19 </ b> A to 19 </ b> J detect the sheet P conveyed along the sheet feeding path RS in the sheet feeding unit 2. The paper sensor 19A is disposed in the vicinity of the upstream side of the internal paper feed transport roller 15A, and the paper sensor 19B is disposed in the vicinity of the downstream side of the internal paper feed transport roller 15A. The paper sensor 19C is disposed in the vicinity of the upstream side of the internal paper feed conveyance roller 15B, and the paper sensor 19D is disposed in the vicinity of the downstream side of the internal paper feed conveyance roller 15B. The paper sensor 19E is disposed in the vicinity of the upstream side of the internal paper feed transport roller 15C, and the paper sensor 19F is disposed in the vicinity of the downstream side of the internal paper feed transport roller 15C. The paper sensor 19G is disposed in the vicinity of the upstream side of the internal paper feed transport roller 15D, and the paper sensor 19H is disposed in the vicinity of the downstream side of the internal paper feed transport roller 15D. The paper sensor 19I is disposed in the vicinity of the upstream side of the vertical conveyance roller 16, and the paper sensor 19J is disposed in the vicinity of the downstream side of the vertical conveyance roller 16.

  The transport printing unit 3 prints an image on the paper P while transporting the paper P. The transport printing unit 3 is disposed on the downstream side of the paper feeding unit 2. The transport printing unit 3 includes a registration roller 21, a registration motor 22, a belt platen unit 23, a belt platen motor 24, a head unit 25, and paper sensors 26A and 26B. In addition, the conveyance printing part 3 comprises a part of conveyance part of a claim.

  The registration roller 21 temporarily stops the sheet P conveyed by the sheet feeding unit 2 or the reversing unit 6 and corrects the skew feeding, and then conveys the sheet P to the belt platen unit 23. The registration roller 21 is disposed on the normal route RC upstream of the transport printing unit 3.

  The registration motor 22 rotates the registration roller 21.

  The belt platen unit 23 conveys the paper P conveyed by the registration rollers 21 while adsorbing and holding the paper P on the belt.

  The belt platen motor 24 drives the belt platen unit 23.

  The head unit 25 has a plurality of line-type inkjet heads (not shown) in which a plurality of nozzles are arranged in a direction (front-rear direction) orthogonal to the transport direction of the paper P. The head unit 25 is disposed above the belt platen portion 23. The head unit 25 prints an image by ejecting ink from the inkjet head onto the paper P conveyed by the belt platen unit 23.

  The paper sensors 26A and 26B detect the paper P transported along the normal route RC in the transport printing unit 3. The sheet sensor 26 </ b> A is disposed near the upstream side of the registration roller 21, and the sheet sensor 26 </ b> B is disposed near the downstream side of the registration roller 21.

  The upper surface transport unit 4 transports the paper P transported by the belt platen unit 23 to the paper discharge unit 5 or the reversing unit 6. The upper surface transport unit 4 includes two pairs of ascending transport rollers 31, a lifting transport motor 32, four pairs of horizontal transport rollers 33, a horizontal transport motor 34, and paper sensors 35A to 35L. In addition, the upper surface conveyance part 4 comprises a part of conveyance part of a claim.

  The ascending conveyance roller 31 conveys the sheet P conveyed by the belt platen unit 23 to the upper horizontal conveyance motor 33. The ascending conveyance roller 31 is disposed along the ascending portion of the midstream area of the normal route RC.

  The ascending conveyance motor 32 rotates and drives the two pairs of ascending conveyance rollers 31.

  The horizontal conveyance motor 33 conveys the paper P conveyed by the ascending conveyance roller 31 to the paper discharge unit 5 or the reversing unit 6. The most downstream horizontal conveyance motor 33 is disposed along the upstream portion of the reversing path RR. The other three pairs of horizontal conveyance motors 33 are arranged along the horizontal portion in the downstream area of the normal route RC.

  The horizontal conveyance motor 34 drives the four pairs of horizontal conveyance motors 33 to rotate.

  The paper sensors 35 </ b> A to 35 </ b> L detect the paper P that is transported along the normal route RC and the reverse route RR in the upper surface transport unit 4. The sheet sensor 35A is disposed in the vicinity of the upstream side of the upstream conveying roller 31 and the sheet sensor 35B is disposed in the vicinity of the downstream side of the upstream conveying roller 31. The sheet sensor 35C is disposed in the vicinity of the upstream side of the downstream ascending conveyance roller 31, and the sheet sensor 35D is disposed in the vicinity of the downstream side of the downstream ascending conveyance roller 31.

  The paper sensor 35E is disposed in the vicinity of the upstream side of the most upstream horizontal conveyance roller 33, and the paper sensor 35F is disposed in the vicinity of the downstream side of the horizontal conveyance roller 33. The sheet sensor 35G is disposed in the vicinity of the upstream side of the second horizontal conveyance roller 33 from the upstream side, and the sheet sensor 35H is disposed in the vicinity of the downstream side of the horizontal conveyance roller 33. The paper sensor 35I is arranged in the vicinity of the upstream side of the third horizontal conveyance roller 33 from the upstream side, and the paper sensor 35J is arranged in the vicinity of the downstream flow side of the horizontal conveyance roller 33. The paper sensor 35K is disposed in the vicinity of the upstream side of the most downstream horizontal transport roller 33, and the paper sensor 35L is disposed in the vicinity of the downstream flow side of the horizontal transport roller 33.

  The paper discharge unit 5 conveys the printed paper P and discharges it. The paper discharge unit 5 includes a switching unit 41, a solenoid 42, a paper discharge roller 43, a paper discharge motor 44, a paper discharge table 45, and paper sensors 46A and 46B. In addition, the paper discharge unit 5 constitutes a part of the transport unit in the claims.

  The switching unit 41 switches the transport path of the paper P between the paper discharge path RD and the reverse path RR. The switching unit 41 is disposed at a branch point between the paper discharge route RD and the reverse route RR.

  The solenoid 42 drives the switching unit 41.

  The paper discharge roller 43 conveys the paper P guided to the paper discharge path RD by the switching unit 41 and discharges it to the paper discharge tray 45. The paper discharge roller 43 is disposed between the switching unit 41 and the paper discharge table 45 along the paper discharge path RD.

  The paper discharge motor 44 rotates the paper discharge roller 43.

  The paper discharge tray 45 is for stacking printed paper P discharged by the paper discharge roller 43. The paper discharge table 45 has a tray shape protruding from the housing 10 and is inclined.

  The paper sensors 46A and 46B detect the paper P that is transported along the paper discharge path RD and discharged. The paper sensor 46 </ b> A is disposed near the upstream side of the paper discharge roller 43, and the paper sensor 46 </ b> B is disposed near the downstream side of the paper discharge roller 43.

  The reversing unit 6 reverses the single-side printed paper P and transports it to the transport printing unit 3 during duplex printing. The reversing unit 6 includes a reversing roller 51, a reversing motor 52, a refeed roller 53, a refeed motor 54, a switching gate 55, and sheet sensors 56A to 56D.

  The reverse roller 51 switches back the paper P that has been transported by the horizontal transport roller 33 and transports it to the refeed roller 53. The reverse roller 51 is disposed on the downstream side of the most downstream horizontal transport roller 33 along the reverse path RR.

  The reverse motor 52 drives the reverse roller 51 to rotate.

  The re-feed roller 53 conveys the paper P that is switched back by the reverse roller 51 and turned upside down to the registration roller 21. The refeed roller 53 is disposed on the reverse path RR between the reverse roller 51 and the registration roller 21.

  The refeed motor 54 rotates the refeed roller 53.

  The switching gate 55 guides the sheet P conveyed by the horizontal conveyance roller 33 to the reverse roller 51. The switching gate 55 guides the paper P switched back by the reverse roller 51 to the refeed roller 53. The switching gate 55 is disposed in the vicinity of the center of gravity at the three locations of the horizontal conveyance roller 33, the reverse roller 51, and the refeed roller 53 on the most downstream side.

  The sheet sensors 56A to 56D detect the sheet P conveyed along the reversing path RR in the reversing unit 6. The paper sensor 56A is disposed in the vicinity of the upstream side of the reverse roller 51 in the transport direction of the paper P from the horizontal transport roller 33, and the paper sensor 56B is disposed in the vicinity of the downstream side of the reverse roller 51 in the transport direction. The sheet sensor 56 </ b> C is disposed in the vicinity of the upstream side of the refeed roller 53, and the sheet sensor 56 </ b> D is disposed in the vicinity of the downstream side of the refeed roller 53.

  The operation panel 7 displays various input screens and accepts input operations by the user. The operation panel 7 includes a display unit 61 and an input unit 62.

  The display unit 61 displays various input screens. The display unit 61 includes a liquid crystal display panel and the like.

  The input unit 62 receives an input operation by the user and outputs an operation signal corresponding to the operation. The input unit 62 includes various operation keys, a touch panel, and the like.

  The storage unit 8 stores a paper jam release history table 71. The storage unit 8 includes an HDD (Hard Disk Drive) or the like.

  As shown in FIG. 3, the paper jam release history table 71 holds an error operation rate for each paper jam release operation position for each user. In addition, the paper jam release history table 71 holds the number of operations, the number of erroneous operations, and the number of consecutive proper operations for each user at each paper jam release operation position.

  The paper jam release operation positions A, B,... Indicate positions in the printing apparatus 1 where the user performs a paper jam release operation after the paper jam has occurred. The paper jam release operation positions A, B,... Are positions where openings for taking out residual paper from the printing apparatus 1 and dials (both not shown) for manually rotating the transport rollers are provided. It is. Residual paper on the transport path when a paper jam occurs is removed from the transport path by a user's paper jam release operation at any paper jam release operation position corresponding to the remaining position.

  The erroneous operation rate is a ratio of the number of erroneous operations to the number of operations. The operation target count at each paper jam release operation position is the number of times that a residual paper exists at a position corresponding to the paper jam release operation position when a paper jam occurs. The number of erroneous operations at each paper jam release operation position is the number of times that the user has erroneously performed a jam release operation at the paper jam release operation position.

  The appropriate number of continuous operations at each paper jam release operation position is the current number of continuous jam release operations performed by the user at the paper jam release operation position.

  The control unit 9 controls the operation of each unit of the printing apparatus 1. The control unit 9 includes a CPU, a RAM, a ROM, and the like.

  When there is no remaining paper corresponding to the paper jam clearing operation position where the error operation rate of the user who performs the paper jam clearing operation is greater than or equal to the threshold when the paper jam occurs, the control unit 9 displays a normal paper jam clearing guide display on the display unit 61. Control to do. The normal paper jam clearing guide display displays the paper jam clearing operation method at each paper jam clearing operation position corresponding to the position of the remaining paper when the paper jam occurs based on a predetermined order. When there is a remaining paper corresponding to the paper jam clearing operation position where the error operation rate of the user who performs the paper jam clearing operation is equal to or greater than the threshold, the control unit 9 controls the display unit 61 to display the user-supported paper jam clearing guide. . The user-supported paper jam clearing guide display is a paper jam clearing guide display in which the paper jam clearing operation position where the error operation rate of the user who performs the paper jam clearing operation is equal to or greater than a threshold is more important than the other paper jam clearing operation positions.

  Next, the operation of the printing apparatus 1 will be described.

  When performing single-sided printing, the control unit 9 controls the paper feeding unit 2 to sequentially take out the paper P from any one of the external paper feeding table 11 and the internal paper feeding tables 13A to 13C and feed the paper P to the transport printing unit 3. . Here, the control unit 9 feeds paper so as to sequentially feed at a timing corresponding to the drive timing of the registration roller 21 that feeds each paper P so that each paper P is conveyed between predetermined papers in the belt platen unit 23. Control part 2.

  The fed paper P is sent to the belt platen unit 23 by the registration roller 21. Next, the paper P is printed by ink ejected from the head unit 25 while being conveyed by the belt platen unit 23. The printed paper P is conveyed from the belt platen unit 23 to the upper surface conveyance unit 4, and is conveyed by the upper conveyance roller 31 and the horizontal conveyance roller 33 in the upper surface conveyance unit 4. Then, the paper P is guided to the paper discharge path RD by the switching unit 41, conveyed by the paper discharge roller 43, and discharged onto the paper discharge tray 45.

  When performing double-sided printing, the control unit 9 sequentially feeds the paper P at a timing at which the time between the paper feeding timings of each paper P is doubled with respect to the paper feeding timing at the time of single-sided printing when the paper sizes are the same. The paper feed unit 2 is controlled to make paper.

  The fed paper P is printed by ink ejected from the head unit 25 while being transported by the belt platen unit 23 as in the case of single-sided printing. The sheet P after single-sided printing is transported from the belt platen unit 23 to the upper surface transport unit 4, and is transported by the ascending transport roller 31 and the horizontal transport roller 33 in the upper surface transport unit 4. Then, the paper P is guided to the reversal path RR by the switching unit 41.

  The paper P guided to the reverse path RR is guided to the reverse roller 51 by the switching gate 55 and switched back by the reverse roller 51 in the reverse portion 6. The switched-back paper P is guided to the refeed roller 53 by the switching gate 55. Then, the paper P is re-fed to the transport printing unit 3 by the re-feed roller 53 and is sent to the belt platen unit 23 by the registration roller 21 in the transport printing unit 3.

  Here, the paper P after single-sided printing is re-fed at a timing such that it is sent to the belt platen unit 23 alternately with the unprinted paper P that is sequentially fed. As described above, in double-sided printing, the time between the paper feed timings of each paper P is twice as long as the paper feed timing in single-sided printing when the paper sizes are the same. For this reason, it is possible to insert the paper P after the single-sided printing between the unprinted papers P and re-feed the paper P after the single-sided printing alternately with the feeding of the unprinted paper P. .

  Since the paper P after single-sided printing is reversed by the reversing unit 6, the paper P is sent to the belt platen unit 23 with the unprinted surface facing upward. Then, the unprinted surface of the paper P is printed by the ink ejected from the head unit 25 while being conveyed by the belt platen unit 23. The double-side printed paper P is transported to the paper discharge unit 5 by the upper surface transport unit 4, and is discharged to the paper discharge tray 45 in the paper discharge unit 5.

  As described above, in double-sided printing, refeeding of paper P after single-sided printing is performed alternately with feeding of unprinted paper P, so that one of the unprinted papers P on the belt platen unit 23. Printing on the first side and printing on the unprinted side of the paper P after single-sided printing are alternately performed. Thereby, double-sided printing is performed with the productivity per side equivalent to that during single-sided printing.

  During execution of the above-described single-sided printing or double-sided printing, the control unit 9 determines whether or not a paper jam has occurred. Specifically, the controller 9 determines that the error from the theoretical value of the detection timing of the paper P is a threshold value in at least one of the paper sensors 19A to 19J, 26A, 26B, 35A to 35L, 46A, 46B, and 56A to 56D. If this is the case, it is determined that a paper jam has occurred.

  If it is determined that a jam has occurred, the control unit 9 stops the paper conveyance by the paper feeding unit 2, the conveyance printing unit 3, the upper surface conveyance unit 4, the paper discharge unit 5, and the reversing unit 6.

  Next, the control unit 9 performs a paper jam handling process. The paper jam handling process is a process for notifying the user of a paper jam release operation method after a paper jam has occurred.

  The paper jam handling process will be described. FIG. 4 is a flowchart of the paper jam handling process in the first embodiment. The process of the flowchart of FIG. 4 is started when the paper conveyance is stopped due to the occurrence of a paper jam.

  In step S <b> 1 of FIG. 4, the control unit 9 determines whether there is a remaining sheet corresponding to the sheet jam clearing operation position in which the error operation rate of the user performing the sheet jam clearing operation is equal to or greater than a threshold value.

  Here, the user who performs the paper jam release operation is a user who gives an instruction for printing when a paper jam occurs. The control unit 9 determines that the user who is logged in to the printing apparatus 1 is the user who performs the paper jam clearing operation when printing when a paper jam occurs is instructed.

  The control unit 9 refers to the paper jam release history table 71 and confirms the paper jam release operation position where the error operation rate of the user who performs the paper jam release operation is equal to or greater than a threshold value. Then, the control unit 9 determines whether or not there is a remaining sheet at a position corresponding to the sheet jam release operation position where the erroneous operation rate is equal to or greater than the threshold. Here, the control unit 9 determines whether the paper sensors 19A to 19J, 26A, 26B, 35A to 35L, 46A, 46B, and 56A to 56D are on (detected) or off (non-detected) and remain on the conveyance path. Specify the position of.

  When it is determined that there is a remaining paper corresponding to the paper jam clearing operation position where the erroneous operation rate is equal to or greater than the threshold (step S1: YES), in step S2, the control unit 9 sets the user-compatible paper jam clearing guide display. Specifically, the control unit 9 sets the display order of the paper jam release operation method at each paper jam release operation position displayed in the user-supported paper jam release guide display.

  More specifically, the control unit 9 determines the display order of the paper jam release operation method at each paper jam release operation position corresponding to the position of the remaining paper at the time of paper jam occurrence, and the paper jam release operation with an erroneous operation rate equal to or greater than a threshold value. The paper jam release operation method at the position is set to be displayed before the paper jam release operation methods at other paper jam release operation positions. When there are a plurality of paper jam release operation positions with an erroneous operation rate equal to or greater than the threshold, the control unit 9 sets the order in which the paper jam release operation method is displayed in descending order of the erroneous operation rate. For the paper jam release operation position where the erroneous operation rate is less than the threshold, the control unit 9 determines the display order based on a predetermined order.

  If it is determined that there is no remaining paper corresponding to the paper jam clearing operation position with the erroneous operation rate equal to or greater than the threshold (step S1: NO), in step S3, the control unit 9 sets a normal paper jam clearing guide display. Specifically, the control unit 9 sets the display order of the paper jam release operation method at each paper jam release operation position corresponding to the position of the remaining paper when the paper jam occurs based on a predetermined order.

  Subsequent to step S2 or step S3, in step S4, the control unit 9 causes the display unit 61 to display a paper jam notification screen 81 as shown in FIG.

  The paper jam notification screen 81 is a screen for notifying the user of the occurrence of paper jam and receiving an instruction to start displaying the paper jam release guide. The paper jam notification screen 81 displays a paper jam release guide display start button 811 for accepting an instruction to start display of a paper jam release guide by the user.

  Next, in step S <b> 5, the control unit 9 determines whether or not the paper jam release guide display start button 811 is instructed to start the paper jam release guide display start button 811. When it is determined that the start of paper jam release guide display is not instructed (step S5: NO), the control unit 9 repeats step S5.

  If it is determined that the start of the paper jam release guide display is instructed (step S5: YES), in step S6, the control unit 9 sets a variable n indicating the display order of the paper jam release operation method corresponding to the paper jam release operation position. Set “1”.

  Next, in step S7, the control unit 9 sets the paper jam release operation method at the nth paper jam release operation position in the display order of the paper jam release operation method at each paper jam release operation position set in step S2 or step S3. It is displayed on the display unit 61.

  For example, when n = 1, the control unit 9 displays paper jam release operation method screens 82 to 84 as shown in FIGS. 6 to 8 as the paper jam release operation method at the first paper jam release operation position. This is displayed on the unit 61. The paper jam release operation method screens 82 to 84 can be switched and displayed by the user on the screen. The user performs a paper jam release operation according to the contents of the paper jam release operation method screens 82 to 84.

  Next, in step S8, the control unit 9 determines whether or not all the remaining sheets corresponding to the nth sheet jam release operation position have been removed. When it is determined that there is a residual sheet that has not been removed (step S8: NO), the control unit 9 repeats step S8.

  If it is determined that all the remaining sheets corresponding to the nth sheet jam release operation position have been removed (step S8: YES), in step S9, the control unit 9 determines whether or not the user has performed the sheet jam release operation correctly. Judging. A method for determining whether or not the paper jam release operation is correct will be described later. When it is determined that there is an erroneous operation in the paper jam release operation (step S9: NO), the control unit 9 proceeds to step S13.

  When it is determined that the paper jam release operation has been performed correctly (step S9: YES), in step S10, the control unit 9 performs an appropriate operation at the nth paper jam release operation position of the user performing the paper jam release operation. Add “1” to the number of consecutive times.

  Next, in step S <b> 11, the control unit 9 determines whether or not the proper operation continuous number has reached a specified number. If it is determined that the proper number of consecutive operations has not reached the specified number (step S11: NO), the controller 9 proceeds to step S13.

  When it is determined that the proper number of continuous operations has reached the specified number (step S11: YES), in step S12, the control unit 9 at the nth paper jam release operation position of the user who is performing the paper jam release operation. Reset the erroneous operation rate.

  Specifically, the control unit 9 sets the number of operation targets and the number of erroneous operations at the n-th paper jam release operation position of the user in the paper jam release history table 71 to 0, and sets the error operation rate to 0%. To do. In addition, the control unit 9 resets the number of consecutive proper operations at the nth paper jam release operation position of the user to zero. Thereafter, the control unit 9 proceeds to step S14.

  In step S13, the control unit 9 updates the paper jam release history table 71. Specifically, the control unit 9 adds “1” to the number of operations and the number of erroneous operations at the nth paper jam release operation position of the user who is performing the paper jam release operation. Then, the control unit 9 calculates a new erroneous operation rate based on the calculated operation target count and erroneous operation count, and updates the erroneous operation rate to that value. Note that the proper number of consecutive operations is updated in step S10. After step S13, the control unit 9 proceeds to step S14.

  In step S14, the control unit 9 determines whether or not the variable n is “N” indicating that it is the last paper jam release operation position for displaying the paper jam release operation method.

  When it is determined that n = N is not satisfied (step S14: NO), in step S15, the control unit 9 adds “1” to the variable n.

  Thereafter, the control unit 9 returns to step S7 and causes the display unit 61 to display the paper jam release operation method at the next paper jam release operation position. Thereafter, the control unit 9 performs the processing after step S8.

  The controller 9 repeats the processes of steps S7 to S15 until n = N. Accordingly, the paper jam release operation method at each paper jam release operation position corresponding to the position of the remaining paper when the paper jam occurs is sequentially displayed.

  For example, when N = 3, it is assumed that the paper jam release operation method screens 82 to 84 shown in FIGS. 6 to 8 are displayed as the paper jam release operation method at the first paper jam release operation position. As a result, when the remaining paper corresponding to the first paper jam release operation position is removed, the paper jam release operation method shown in FIGS. 9 and 10 is used as the paper jam release operation method at the second paper jam release operation position. Method screens 85 and 86 are displayed. Then, after the remaining paper corresponding to the second paper jam release operation position is removed, the paper jam release operation method as shown in FIGS. 11 to 13 is used as the paper jam release operation method at the last paper jam release operation position. Screens 87 to 89 are displayed.

  Returning to FIG. 4, when it is determined in step S14 that n = N (step S14: YES), the control unit 9 ends the paper jam handling process.

  By the way, during the execution of the paper jam handling process described above, the user does not follow the display on the display unit 61 and performs an operation of removing the remaining paper from the paper jam clearing operation position where the paper jam clearing operation method is not yet displayed. There is a possibility to do. Even when such a paper jam release operation is performed, the control unit 9 determines whether or not the paper jam release operation has been performed correctly. Then, the control unit 9 reflects the determination result in the paper jam release history table 71 by the same processing as steps S9 to S13 of FIG.

  Next, a method for determining whether or not the paper jam release operation is correct will be described.

  In the printing apparatus 1, the regular pulling direction for removing the remaining paper is determined at each paper jam release operation position. If the user tries to remove the residual paper in the direction opposite to the normal pulling direction, the apparatus may be damaged or the paper may be torn off.

  Therefore, the control unit 9 determines whether or not the paper jam release operation is correct based on the pulling direction of the remaining paper. When all the remaining sheets corresponding to the paper jam release operation position are pulled and removed in the normal pull direction, the control unit 9 determines that the paper jam release operation at the paper jam release operation position has been performed correctly. When there is residual paper that has been removed by being pulled in a direction opposite to the normal pulling direction, the control unit 9 determines that an operation error has occurred in the paper jam release operation at the paper jam release operation position.

  The pulling direction of the remaining paper is determined from changes in the on / off states of the paper sensors 19A to 19J, 26A, 26B, 35A to 35L, 46A, 46B, and 56A to 56D. Here, the relationship between the on / off change of the paper sensor and the pulling direction of the paper P will be described using the paper sensors 26A and 26B as an example.

  As shown in FIG. 14, when the paper P is pulled rightward and removed from the initial state where both the paper sensors 26A and 26B are on, the paper sensor 26A is turned off and the paper sensor 26B is turned on halfway. There is a state. Thereafter, both the paper sensors 26A and 26B are turned off.

  As shown in FIG. 15, when the paper P is pulled leftward and removed from the initial state similar to FIG. 14, the paper sensor 26A is on and the paper sensor 26B is off halfway. Thereafter, both the paper sensors 26A and 26B are turned off.

  As shown in FIG. 16, when the paper P is pulled rightward and removed from the initial state where the paper sensor 26A is on and the paper sensor 26B is off, first, both the paper sensors 26A and 26B are removed from the initial state. It changes to the on state. Next, the paper sensor 26A is turned off and the paper sensor 26B is turned on. Thereafter, both the paper sensors 26A and 26B are turned off.

  As shown in FIG. 17, when the paper P is pulled leftward and removed from the initial state similar to FIG. 16, the initial state is maintained until both the paper sensors 26A and 26B are turned off.

  As shown in FIG. 18, when the paper P is pulled and removed from the initial state where the paper sensor 26A is off and the paper sensor 26B is on, the initial state is maintained until both the paper sensors 26A and 26B are turned off. Is maintained.

  As shown in FIG. 19, when the paper P is removed by being pulled leftward from the initial state similar to FIG. 18, first, both the paper sensors 26A and 26B are changed from the initial state to the on state. Next, the paper sensor 26A is turned on and the paper sensor 26B is turned off. Thereafter, both the paper sensors 26A and 26B are turned off.

  As described above, in the printing apparatus 1, when there is a remaining sheet corresponding to the sheet jam clearing operation position where the erroneous operation rate of the user who performs the sheet jam clearing operation when the paper jam occurs is greater than or equal to the threshold, the control unit 9 The display unit 61 is controlled to display a paper jam clearing guide position in which the paper jam clearing operation position in which the erroneous operation rate is greater than or equal to the threshold is more important than other paper jam clearing operation positions. Specifically, the control unit 9 displays the paper jam release operation method at the paper jam release operation position where the erroneous operation rate is equal to or greater than the threshold before the paper jam release operation methods at other paper jam release operation positions.

  This makes it possible to impress the user with an accurate paper jam clearing operation method at the paper jam clearing operation position that is easy for the user to make an erroneous operation. As a result, it is possible to reduce a user's erroneous operation at the time of paper jam release.

  Further, the control unit 9 resets the erroneous operation rate of the user with respect to the paper jam release operation position where the correct paper jam release operation has been performed continuously by the same user more than the specified number of times. Accordingly, it is possible to perform the paper jam release guide display that places more importance on the paper jam release operation position having a higher error operation rate than the paper jam release operation position that the user has mastered in the paper jam release operation.

  Note that the paper jam clearing operation position at the paper jam clearing operation position where the erroneous operation rate is equal to or greater than the threshold is displayed as a paper jam clearing guide display that places more importance on the paper jam clearing operation position where the erroneous operation rate is equal to or greater than the threshold. The paper jam clearing guide display in which the content is more detailed than the normal display content (display content when the erroneous operation rate is less than the threshold value) may be performed.

  For example, in contrast to the paper jam release operation method displayed on the paper jam release operation method screens 82 to 84 of FIGS. 6 to 8, the paper jam release operation method screen 90 shown in FIG. It is possible to make the display content more detailed than usual by inserting it between.

  In addition, the paper jam clearing operation method at the paper jam clearing operation position where the erroneous operation rate is equal to or greater than the threshold is displayed before the paper jam clearing operation methods at other paper jam clearing operation positions, and the paper jam clearing method where the erroneous operation rate is equal to or greater than the threshold. The display content of the paper jam release operation method at the release operation position may be more detailed than usual.

(Second Embodiment)
Next, a second embodiment in which the paper jam handling process of the above-described embodiment is changed will be described.

  In the second embodiment, the storage unit 8 stores a paper jam release history table 71A shown in FIG.

  The paper jam release history table 71A holds an average operation time for each paper jam release operation position for each user. Further, the paper jam release history table 71A holds the number of operation targets at each paper jam release operation position and the number of continuous operations within a specified time for each user.

  The average operation time at each paper jam release operation position is an average of the time required for the paper jam release operation at the paper jam release operation position (paper jam release operation time). The continuous operation count within the specified time is the current continuous count of the paper jam clearing operation completed within less than the specified time. Here, the specified time is set for each paper jam release operation position.

  When there is no residual paper corresponding to the paper jam clearing operation position where the average operation time of the user who performs the paper jam clearing operation exceeds the specified time when the paper jam occurs, the control unit 9 clears the normal paper jam on the display unit 61. Control to perform guide display. When there is a remaining paper corresponding to the paper jam clearing operation position where the average operation time of the user who performs the paper jam clearing operation is equal to or longer than the specified time, the control unit 9 displays the user-supported paper jam clearing guide on the display unit 61. Control. The paper jam release guide display for the user according to the second embodiment is a paper jam release guide that places more importance on the paper jam release operation position where the average operation time of the user who performs the paper jam release operation is the specified time or more than other paper jam release operation positions. It is a display.

  Here, it can be estimated that the longer the average operation time is, the more difficult it is for the user to understand the paper jam release operation, and the easier the operation becomes. Therefore, in the second embodiment, when there is a remaining paper corresponding to the paper jam release operation position where the average operation time of the user who performs the paper jam release operation is equal to or longer than the specified time, the paper jam whose user's average operation time is equal to or longer than the specified time. A paper jam release guide is displayed with the release operation position more important than other paper jam release operation positions.

  Next, the paper jam handling process will be described. FIG. 22 is a flowchart of the paper jam handling process in the second embodiment. The process of the flowchart of FIG. 22 is started when the paper conveyance is stopped due to the occurrence of a paper jam.

  In step S21 in FIG. 22, the control unit 9 determines whether or not there is a remaining sheet corresponding to the sheet jam clearing operation position where the average operation time of the user who performs the sheet jam clearing operation is equal to or longer than the specified time.

  The control unit 9 refers to the paper jam release history table 71A and confirms the paper jam release operation position where the average operation time of the user who performs the paper jam release operation is longer than the specified time. Then, the control unit 9 determines whether or not there is a remaining sheet at a position corresponding to the sheet jam release operation position where the average operation time is equal to or longer than the specified time.

  If it is determined that there is a remaining paper corresponding to the paper jam clearing operation position where the erroneous operation rate is equal to or greater than the threshold (step S21: YES), in step S22, the control unit 9 sets the user-supported paper jam clearing guide display.

  Specifically, the control unit 9 sets the display order of the paper jam release operation method at each paper jam release operation position corresponding to the position of the remaining paper at the time of paper jam occurrence, and the paper jam release with an average operation time equal to or longer than a specified time. The paper jam release operation method at the operation position is set to be displayed before the other paper jam release operation methods at the paper jam release operation position. When there are a plurality of paper jam clearing operation positions where the average operation time is equal to or longer than the specified time, the control unit 9 displays the paper jam clearing operation method in order from the largest difference between the average operation time and the specified time. . For the paper jam release operation position where the average operation time is less than the specified time, the control unit 9 determines the display order based on a predetermined order. After step S22, the control unit 9 proceeds to step S24.

  If it is determined that there is no remaining paper corresponding to the paper jam release operation position whose average operation time is equal to or longer than the specified time (step S21: NO), in step S23, the control unit 9 sets the normal paper jam release guide display. Do. Thereafter, the control unit 9 proceeds to step S24.

  The process of steps S24 to S28 is the same as the process of steps S4 to S8 of FIG. 4 described above.

  Subsequent to step S28, in step S29, the control unit 9 determines whether or not the paper jam release operation time is less than the specified time. The paper jam release operation time is the time from the start of display of the paper jam release operation method in step S27 to the time when it is determined in step S28 that all remaining paper has been removed. If it is determined that the paper jam release operation time is equal to or longer than the specified time (step S29: NO), the control unit 9 proceeds to step S33.

  When it is determined that the paper jam release operation time is less than the specified time (step S29: YES), in step S30, the control unit 9 determines the nth paper jam release operation position of the user who is performing the paper jam release operation. “1” is added to the number of consecutive operations within the specified time.

  Next, in step S31, the control unit 9 determines whether or not the number of continuous operations within the specified time has reached the specified number. When it is determined that the number of continuous operations within the specified time has not reached the specified number (step S31: NO), the control unit 9 proceeds to step S33.

  When it is determined that the number of continuous operations within the specified time has reached the specified number (step S31: YES), in step S32, the control unit 9 performs the nth paper jam release operation of the user performing the paper jam release operation. Reset the average operating time at the position.

  Specifically, in the paper jam release history table 71A, the control unit 9 sets the operation target number of times for the user at the nth paper jam release operation position to 0, and sets the average operation time to 0 seconds. The control unit 9 also resets the number of consecutive operations within the specified time at the n-th paper jam release operation position of the user to zero. Thereafter, the control unit 9 proceeds to step S34.

  In step S33, the control unit 9 updates the paper jam release history table 71A. Specifically, the control unit 9 adds “1” to the operation target number of times at the nth paper jam release operation position of the user who is performing the paper jam release operation. Further, the control unit 9 calculates a new average operation time considering the current paper jam release operation time, and updates the average operation time to the value. The number of continuous operations within the specified time is updated in step S30. After step S33, the controller 9 proceeds to step S34.

  The processing in steps S34 and S35 is the same as the processing in steps S14 and S15 in FIG.

  The control unit 9 repeats the processes of steps S27 to S35 until n = N. Accordingly, the paper jam release operation method at each paper jam release operation position corresponding to the position of the remaining paper when the paper jam occurs is sequentially displayed.

  If it is determined in step S34 that n = N (step S34: YES), the control unit 9 ends the paper jam handling process.

  As described above, in the second embodiment, when there is a remaining paper corresponding to the paper jam clearing operation position where the average operation time of the user who performs the paper jam clearing operation when the paper jam occurs is equal to or longer than the specified time, in the second embodiment. Then, the display unit 61 is controlled so that a paper jam release guide display in which the paper jam release operation position where the average operation time of the user is longer than the specified time is more important than the other paper jam release operation positions is displayed. Specifically, the control unit 9 displays the paper jam release operation method at the paper jam release operation position where the average operation time is equal to or longer than the specified time before the paper jam release operation method at other paper jam release operation positions. .

  This makes it possible to impress the user with an accurate paper jam release operation method at the paper jam release operation position that is estimated to be difficult for the user to understand the paper jam release operation. As a result, it is possible to reduce a user's erroneous operation at the time of paper jam release.

  In addition, the control unit 9 resets the average operation time of the user with respect to the paper jam clearing operation position where the paper jam clearing operation has been performed by the same user continuously for a prescribed number of times or less within a prescribed time. Accordingly, it is possible to perform the paper jam release guide display that places more importance on the paper jam release operation position where the average operation time is longer than the paper jam release operation position that the user has mastered in the paper jam release operation.

  Paper jam release operation position where the average operation time is longer than the specified time is displayed as a paper jam release guide display that places more importance on the paper jam release operation position than other paper jam release operation positions. The paper jam release guide display in which the display content of the operation method is more detailed than the normal display content (display content when the average operation time is less than the specified time) may be performed.

  In addition, the paper jam release operation method at the paper jam release operation position where the average operation time is longer than the specified time is displayed before the paper jam release operation methods at other paper jam release operation positions, and the average operation time is the specified time. The display content of the paper jam release operation method at the above paper jam release operation position may be more detailed than usual.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 2 Paper feed part 3 Conveyance printing part 4 Upper surface conveyance part 5 Paper discharge part 6 Inversion part 7 Operation panel 8 Memory | storage part 9 Control part 11 External paper feed stand 12 External paper feed roller 13A-13C Internal paper feed stand 14A- 14C Internal paper feed roller 15A to 15D Internal paper feed roller 16 Vertical feed roller 17 External paper feed motor 18 Internal paper feed motor 19A to 19J Paper sensor 21 Registration roller 22 Registration motor 23 Belt platen section 24 Belt platen motor 25 Head unit 26A , 26B Paper sensor 31 Ascending transport roller 32 Ascending transport motor 33 Horizontal transport roller 34 Horizontal transport motor 35A-35L Paper sensor 41 Switching unit 42 Solenoid 43 Paper discharge roller 44 Paper discharge motor 45 Paper discharge table 46A, 46B Paper sensor 51 Reverse roller 52 Reverse motor 53 Re Paper roller 54 re-feed motor 55 switching gate 56A~56D paper sensor 61 display unit 62 input unit 71,71A paper jam release history table 82-90 paper jam clearance instructions screen

Claims (4)

A transport unit for transporting paper along the transport path;
A paper jam release history table that holds, for each user, an erroneous operation rate for each paper jam release operation position in the paper jam release operation after paper jam has occurred in the transport path;
A display unit;
When a paper jam occurs, if there is residual paper corresponding to the paper jam release operation position where the error operation rate of the user performing the paper jam release operation is equal to or greater than a threshold, the paper jam release operation position is released from the paper jam release position on the display unit. And a control unit that controls to perform a paper jam release guide display that is more important than an operation position.   The printing apparatus according to claim 1, wherein the control unit resets an erroneous operation rate of the user with respect to a paper jam clearing operation position where a correct paper jam clearing operation is continuously performed by the same user for a predetermined number of times or more. . A transport unit for transporting paper along the transport path;
A paper jam release history table that holds, for each user, an average operation time for each paper jam release operation position in the paper jam release operation after paper jam has occurred in the transport path;
A display unit;
When a paper jam occurs, if there is a remaining paper corresponding to the paper jam clearing operation position where the average operation time of the user who performs the paper jam clearing operation is longer than the specified time, the paper jam clearing operation position is set to the other paper on the display unit. And a control unit that controls to perform a paper jam release guide display more important than a jam release operation position.   4. The control unit according to claim 3, wherein the control unit resets an average operation time of the user with respect to a paper jam release operation position where a paper jam release operation has been performed continuously for less than a specified time by the same user for a specified number of times. The printing apparatus as described.