Post-processing device and printing device

Abstract

To solve the problem that a perforation defect of a sheet may be caused owing to variation in a moisture amount in the sheet affected by printing and environment.SOLUTION: A post-processing unit 30 comprises: a punch unit 40 which perforates a sheet P recorded by a recording unit 2 discharging ink Q; and a control part 24 which controls perforating operation of the punch unit 40. The control part 24 sets at least one of the number of times of perforation by the punch unit 40 for each sheet P and a perforating speed, based upon at least one of piece of setting information from among information on the sheet P related to change in rigidity of the sheet P, recording information and environment information on the recording unit 2.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a post-processing device and a printing device.

Background Art

[0002] In the sheet processing device of Patent Document 1, the higher the basis weight of the sheet, the faster the moving speed of the punch blade.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the sheet processing device of Patent Document 1, the rigidity of the sheet that changes depending on printing and the environment is not taken into consideration. Here, when the amount of moisture in the sheet changes due to printing or the environment and the rigidity of the sheet with respect to the force in the punching direction decreases, the punching performed on the sheet may be insufficient, and there is a risk of punching defects in the sheet.

Means for Solving the Problems

[0005] The post-processing device according to the present invention for solving the above problems includes a punching unit that punches a medium recorded by a recording unit that discharges a liquid, and a control unit that controls the punching operation of the punching unit. The control unit sets at least one of the number of punches per sheet of the medium and the punching speed in the punching unit based on at least one piece of setting information among the information of the medium related to the rigidity of the medium, the recording information in the recording unit, and the environmental information.

[0006] In order to solve the above problems, the printing apparatus according to the present invention is characterized by including the post-processing apparatus according to any one of the first to fifteenth aspects and the recording unit that performs recording on a medium conveyed to the post-processing apparatus.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0008] Hereinafter, the first to fifteenth aspects of the present invention will be schematically described. The post-processing apparatus according to the first aspect includes a punching unit that punches a medium recorded by a recording unit that discharges a liquid, and a control unit that controls the punching operation of the punching unit. The control unit sets at least one of the number of punches per sheet of the medium and the punching speed in the punching unit based on at least one piece of setting information among information on the medium related to the rigidity of the medium, recording information in the recording unit, and environmental information. According to this aspect, by setting at least one of the number of punches and the punching speed in accordance with the rigidity of the medium, for example, even for the medium with reduced rigidity, holes can be more easily formed in the medium by increasing the number of punches or increasing the punching speed, so that punching defects in the medium can be suppressed.

[0009] The post-processing apparatus according to the second aspect is the same as the first aspect, except that the recording information includes information on the recording density of the punching planned area on the medium, and the control unit sets at least one of the number of punches and the punching speed based on the information on the recording density. When the recording density is high, the amount of the liquid adhering to the medium increases. When the recording density is low, the amount of the liquid adhering to the medium decreases. Here, according to this aspect, by setting at least one of the number of punches and the punching speed based on the recording density, punching can be performed in accordance with the amount of the liquid on the medium, so that punching defects in the medium can be suppressed.

[0010] The post-processing apparatus according to the third aspect is the same as the second aspect, except that when the punching unit punches a plurality of the punching planned areas, the control unit sets at least one of the number of punches and the punching speed based on the highest recording density among the recording densities in the plurality of the punching planned areas. According to this aspect, since at least one of the number of punches and the punching speed is set in accordance with the position where punching defects are most likely to occur, punching defects in the medium can be suppressed.

[0011] In the post-processing apparatus according to the fourth aspect, in the second aspect, when recording is performed on the first surface of the medium and the second surface opposite to the first surface by the recording unit, the control unit is based on the average value of the first recording density in the planned perforation area on the first surface and the second recording density in the planned perforation area on the second surface. And at least one of the number of perforations and the perforation speed is set. According to this aspect, since at least one of the number of perforations and the perforation speed is set including not only the first recording density on the first surface but also the second recording density on the second surface, compared with a configuration in which perforation is performed based only on the first recording density, Perforation defects in the medium can be suppressed.

[0012] In the post-processing apparatus according to the fifth aspect, in the fourth aspect, when the perforating unit perforates a plurality of the planned perforation areas, the control unit is based on the highest average value among the plurality of average values. And at least one of the number of perforations and the perforation speed is set. According to this aspect, in the medium, at least one of the number of perforations and the perforation speed is set based on the average value of the recording density at the position where the possibility of perforation defects occurring is the highest, so perforation defects in the medium can be suppressed.

[0013] In the post-processing apparatus according to the sixth aspect, in the fourth aspect or the fifth aspect, when the average value in the planned perforation area is higher than a predetermined value, the control unit increases at least one of the number of perforations and the perforation speed. It is characterized by that. According to this aspect, when the average value of the recording density is high and the possibility of perforation defects occurring is high, at least one of the number of perforations and the perforation speed is increased, so perforation defects in the medium can be suppressed.

[0014] In the seventh aspect, the post-processing device, in the second or third aspect, when the recording density in the planned perforation area is higher than a predetermined value, the control unit is characterized by increasing at least one of the number of perforations and the perforation speed. According to this aspect, even when the possibility of occurrence of perforation defects increases due to an increase in the recording density, at least one of the number of perforations and the perforation speed is increased, so that perforation defects can be suppressed.

[0015] In the eighth aspect, the post-processing device, in the sixth or seventh aspect, the control unit is characterized by increasing the number of perforations and the perforation speed. According to this aspect, when the productivity decreases due to an increase in the number of perforations, the productivity can be maintained by increasing the perforation speed, so that the number of perforations can be increased while maintaining the productivity.

[0016] In the ninth aspect, the post-processing device, in any one of the first to eighth aspects, the control unit is characterized by using at least one of temperature and humidity as the environmental information. According to this aspect, by using at least one of temperature and humidity as the environmental information, perforation defects can be more effectively suppressed.

[0017] In the tenth aspect, the post-processing device, in any one of the first to ninth aspects, the control unit is characterized by using the thickness of the medium as the information of the medium. According to this aspect, by using the thickness of the medium as the information of the medium, perforation defects can be more effectively suppressed.

[0018] In the eleventh aspect, the post-processing device, in the tenth aspect, when the thickness of the medium to be perforated is equal to or greater than a predetermined thickness, the control unit reduces at least one of the number of perforations and the perforation speed, and when the thickness of the medium to be perforated is less than the predetermined thickness, the control unit increases at least one of the number of perforations and the perforation speed. According to this aspect, by setting at least one of the number of perforations and the perforation speed in consideration of the thickness of the medium, it is possible to further suppress perforation defects.

[0019] The post-processing apparatus according to the twelfth aspect is, in any one of the first aspect to the eleventh aspect, characterized in that the medium has vertical or horizontal grain, and the control unit uses the grain direction of the medium as information of the medium. According to this aspect, by using the grain direction of the medium, it is possible to further suppress perforation defects.

[0020] The post-processing apparatus according to the thirteenth aspect is, in the twelfth aspect, characterized in that the perforating unit has a blade portion that is rotatably provided and extends along one direction when viewed from the perforation direction, and a drive unit that rotates the blade portion, and the control unit rotates the blade portion by the drive unit so that the one direction and the grain direction intersect. According to this aspect, since the medium is easily cut by the intersection of the grain direction and the one direction of the blade portion, it is possible to further suppress perforation defects.

[0021] The post-processing apparatus according to the fourteenth aspect is, in any one of the first aspect to the thirteenth aspect, characterized in that the recording unit is capable of performing single-sided printing in which printing is performed on the first surface of the medium or the second surface opposite to the first surface by the recording unit, and double-sided printing in which recording is performed on both the first surface and the second surface, the single-sided printing or the double-sided printing can be selected as the recording information, and the control unit increases at least one of the number of perforations and the perforation speed when the double-sided printing is performed, compared to at least one of the number of perforations and the perforation speed when the single-sided printing is performed. According to this aspect, by setting at least one of the number of perforations and the perforation speed in consideration of the information of the recording surface as the recording information, it is possible to further suppress perforation defects.

[0022] In the post-processing apparatus according to the 15th aspect, in any one of the 1st to 14th aspects, the control unit can be switched from one of the first punching mode and the second punching mode to the other. When switched to the first punching mode, the control unit changes at least one of the punching count and the punching speed based on the setting information. When switched to the second punching mode, the control unit does not change the settings of the punching count and the punching speed. According to this aspect, for example, when the user prioritizes higher productivity over the quality of punching, by switching to the second punching mode, it is possible to prevent a decrease in productivity.

[0023] The printing apparatus according to the 16th aspect includes the post-processing apparatus described in any one of the 1st to 15th aspects and a recording unit that performs recording on a medium conveyed to the post-processing apparatus. According to this aspect, the same operations and effects as those in any one of the 1st to 15th aspects can be obtained.

[0024] Hereinafter, an example of the post-processing apparatus and the printing apparatus according to the present invention will be specifically described. [Embodiment 1] FIG. 1 shows a recording system 1 which is an example of a printing apparatus. The recording system 1 is configured as an inkjet apparatus that performs recording by discharging ink Q, which is an example of a liquid, onto a sheet P, which is an example of a medium.

[0025] The sheet P is formed in a rectangular shape having a long side and a short side. Also, as an example, the sheet P has vertical grain in which fibers flow along the long side. Note that the grain direction of the sheet P is not limited to vertical grain and may be horizontal grain. Information on the grain direction is set in an operation unit 15 (FIG. 2) described later.

[0026] In the X-Y-Z coordinate system represented in each figure, the X direction is the width direction of the apparatus, the Y direction is the depth direction of the apparatus, and the Z direction is the height direction of the apparatus. The X direction, Y direction, and Z direction are orthogonal to each other. The Y direction is an example of the width direction of the paper P. The Z direction is an example of the punching direction. When distinguishing left and right with respect to the center in the width direction of the apparatus when viewing the recording system 1 from the front, the left is defined as the +X direction and the right is defined as the -X direction. When distinguishing the front and the back with respect to the center in the depth direction of the apparatus, the front is defined as the +Y direction and the back is defined as the -Y direction. When distinguishing the top and the bottom with respect to the center in the height direction of the apparatus, the top is defined as the +Z direction and the bottom is defined as the -Z direction.

[0027] The recording system 1 has, in order in the +X direction, a recording unit 2, an intermediate unit 4, and a post-processing unit 30. In the recording system 1, the recording unit 2, the intermediate unit 4, and the post-processing unit 30 are mechanically and electrically connected to each other. The intermediate unit 4 conveys the paper P fed from the recording unit 2 to the post-processing unit 30. The recording system 1 is configured to perform post-processing on the paper P on which information is recorded in the image forming unit 10 described later. Let the path along which the paper P is conveyed in the recording system 1 be the conveyance path K.

[0028] The recording system 1 may further include an operation unit 15 (FIG. 2) operated by a user and a display unit 17 (FIG. 2) on which various information of the recording system 1 is displayed. In the present embodiment, as an example, the operation unit 15 and the display unit 17 are provided in the recording unit 2. The operation unit 15 and the display unit 17 are, as an example, composed of a single touch panel, configured to be able to execute operations of each part of the recording system 1, and configured to be able to set various information. Among the various information, the thickness, grain direction, size, and printing surface of the paper P are included.

[0029] The thickness, grain direction, and size of the paper P are examples of information of the medium related to changes in the rigidity of the paper P. The conveyance direction of the sheet P is indicated by the arrow T. In the following description, the conveyance direction of the sheet P will be simply referred to as the conveyance direction. The conveyance direction is not constant and changes in angle with respect to the horizontal direction depending on the position of the sheet P in the conveyance path K.

[0030] The recording unit 2 is an example of a recording section, and records various information on the sheet P conveyed to the post-processing unit 30. The sheet P is formed in a sheet shape. Also, the recording unit 2 may include an image forming section 10, a scanner section 12, a cassette housing section 14, a power supply 16, and a conveyance section 19. The image forming section 10 may be configured to include, as an example, a recording head 20 and a control section 24. The scanner section 12 reads information on a manuscript (not shown). The cassette housing section 14 has a plurality of housing cassettes 18 for housing a plurality of sheets P. The recording head 20 is configured as a line head, as an example. Also, the recording head 20 includes a discharge section 22 composed of a plurality of nozzles (not shown). The discharge section 22 performs recording by discharging ink Q onto the conveyed sheet P.

[0031] As shown in FIG. 2, the control section 24 that functions as a computer includes a CPU (Central Processing Unit) 25, a memory 26, a timer 27 capable of measuring time or a time point based on each time point, a recording density estimation section 28, and a storage (not shown). Also, the control section 24 controls various operations in each part of the recording system 1. Based on information input to the control section 24 from outside the recording system 1 or the operation section 15, the control section 24 controls the conveyance operation of the sheet P by the conveyance section 19, the recording operation on the sheet P by the recording head 20, and the punching operation of the punching unit 40. Also, the control section 24 controls the discharge of the ink Q in the discharge section 22 based on the image data as recording information. Note that the specific control of the punching unit 40 by the control section 24 will be described later.

[0032] Memory 26 is an example of a storage unit and stores various types of data. Various types of data including the program PR executed by CPU 25 are stored in memory 26. In other words, memory 26 is an example of a recording medium in which a computer-readable program PR is stored. Other examples of recording media include CDs (Compact Discs), DVDs (Digital Versatile Discs), Blu-ray discs, USB (Universal Serial Bus) memories, and the like. Also, in a part of memory 26, the program PR can be expanded. The program PR is a program for causing CPU 25 to execute each of the steps described later in the recording system 1.

[0033] In the present embodiment, the recording density means the ratio [%] of the number of dots actually driven to the maximum number of dots that can be driven with ink Q in the recordable area SA (FIG. 4) of the sheet P described later. In other words, the control unit 24 estimates the discharge amount of the ink Q in the discharge unit 22 (FIG. 1) by estimating the recording density. The recording density estimation unit 28 estimates the recording density based on the recording information of the perforation planned areas SB1, SB2, SB3, SB4 (FIG. 5) on the sheet P. In the present embodiment, the information on the recording density in the perforation planned areas SB1, SB2, SB3, SB4 of the sheet P is an example of the recording information related to the rigidity of the sheet P. The perforation planned areas SB1, SB2, SB3, SB4 will be described later.

[0034] As information on the printing surface set in the operation unit 15, there is information on single-sided printing and double-sided printing. The information on single-sided printing and double-sided printing is an example of the recording information. Here, one surface of the sheet P is defined as the first surface P1 (FIG. 4), and the surface opposite to the first surface P1 is defined as the second surface P2 (FIG. 4). Single-sided printing is printing in which recording is performed on the first surface P1 or the second surface P2 by the recording unit 2. Double-sided printing is printing in which recording is performed on both the first surface P1 and the second surface P2 by the recording unit 2. As described above, the recording unit 2 can execute single-sided printing and double-sided printing. In the operation unit 15, single-sided printing or double-sided printing can be selected by the user.

[0035] The recording system 1 is further provided with a temperature sensor 21 and a humidity sensor 23. The temperature sensor 21 is an example of a temperature measuring unit, and measures the temperature inside the device of the recording system 1. In this embodiment, the temperature sensor 21 is provided inside the recording unit 2. The temperature information obtained by the temperature sensor 21 is transmitted to the control unit 24. The humidity sensor 23 is an example of a humidity measuring unit, and measures the humidity inside the device of the recording system 1. In this embodiment, the humidity sensor 23 is provided inside the recording unit 2. The humidity information obtained by the humidity sensor 23 is transmitted to the control unit 24. The temperature information and the humidity information are each an example of environmental information related to the change in the rigidity of the paper P. Note that the information of the medium, the recording information, and the environmental information described above are collectively referred to as "setting information" from the viewpoint of setting the conditions for the punching process described later.

[0036] As shown in FIG. 1, the conveyance unit 19 is provided for the entire recording system 1. The conveyance unit 19 includes a plurality of roller pairs and a plurality of motors (not shown), and conveys the paper P in the conveyance direction. Specifically, the conveyance unit 19 conveys the paper P from the storage cassette 18 to the recording area of the recording head 20, and further conveys the paper P from the recording area to the post-processing unit 30 via the intermediate unit 4.

[0037] The post-processing unit 30 is an example of a post-processing device, and includes a control unit 24, a housing 32, a discharge unit 33, a paper sensor 34 (FIG. 2), a punch unit 40, and a conveyance roller pair 36. The control unit 24 also serves as the control unit of the post-processing unit 30 as an example. Inside the housing 32, a conveyance path K through which the paper P is conveyed by the conveyance unit 19 is formed. The paper P received from the intermediate unit 4 is conveyed along the conveyance path K and discharged to the discharge unit 33.

[0038] The punch unit 40 is an example of a perforating unit and perforates the sheet P recorded by the recording unit 2. In other words, the punch unit 40 performs a shearing process on the sheet P. Further, the punch unit 40 is provided at the lower part of the housing 32. Note that a part of the conveyance path K and a part facing the punch unit 40 are along the X direction as an example. Thereby, the portion to be perforated in the sheet P is arranged substantially along the horizontal direction.

[0039] The sheet sensor 34 (FIG. 2) is provided upstream of the punch unit 40 in the conveyance direction. The sheet sensor 34 includes an emitting part and a light-receiving part (not shown) as an example. Then, the sheet sensor 34 detects the passing time of the sheet P at the sheet sensor 34 and the stop position of the sheet P with respect to the punch unit 40 by determining whether the light from the emitting part is received at the light-receiving part. The conveyance roller pair 36 is provided downstream of the punch unit 40 in the conveyance direction. The conveyance roller pair 36 conveys the sheet P downstream in the conveyance direction by being rotated.

[0040] As shown in FIG. 3, the punch unit 40 includes a unit main body 42, a die 45 as a pedestal part, four punch members 46, and a drive part 48. As an example of a perforating process, the punch unit 40 forms through holes H at four positions arranged in the Y direction at the -X direction end of the sheet P.

[0041] The unit main body 42 supports the punch members 46. Further, a rotation part 43 and a lifting part 44 (FIG. 2) are provided inside the unit main body 42. The rotation part 43 rotates the punch member 46 by 90° around the central axis along the Z direction when viewed from the Z direction. The presence or absence of rotation is determined based on the grain direction of the sheet P and the arrangement direction of the blade part 46A (FIG. 6) of the punch member 46. The lifting part 44 includes an electromagnetic switch and a cylinder (not shown) and moves the punch member 46 up and down in the Z direction. Note that the rotation part 43 and the lifting part 44 may be integrated like a clamp cylinder.

[0042] As shown in FIG. 6, the punch member 46 is formed in a cylindrical shape with its central axis along the Z direction. At the -Z direction end of the punch member 46, two blade portions 46A are formed at intervals in the Y direction. The two blade portions 46A are provided rotatably around the central axis of the punch member 46. In FIG. 6, as an example, the two blade portions 46A extend substantially along the X direction as an example of one direction when viewed from the Z direction. Also, the two blade portions 46A extend in the X direction intersecting the Y direction along which the vertical grain of the sheet P lies. When the punch member 46 is driven in the -Z direction by the drive unit 48, a through hole H (FIG. 3) is formed by applying a shearing force in the -Z direction to the sheet P on which the ink Q has been ejected.

[0043] As shown in FIG. 2, the drive unit 48 includes a motor and a cam (not shown), and rotates the blade portion 46A by driving the rotating portion 43. Also, the drive unit 48 drives the elevating portion 44 to raise the punch member 46 in the +Z direction or lower it in the -Z direction.

[0044] As shown in FIG. 4, in the sheet P, the recordable area is defined as the recordable area SA. In FIG. 4, the recordable area SA is represented by a dashed-dotted line. Also, in FIG. 4, as an example, the sheet P in the case of edge printing is shown. Four circular through holes H1, H2, H3, and H4 corresponding to the four punch members 46 (FIG. 3) are formed inside the recordable area SA. In this embodiment, as an example, a recordable area SA is also set inside the four through holes H1, H2, H3, and H4. The through holes H1, H2, H3, and H4 are arranged in this order from the +Y direction to the -Y direction.

[0045] As shown in FIG. 5, as an example, among the formation regions of the through holes H1, H2, H3, and H4, a rectangular small region including only the formation region of the through hole H1 is defined as a punching planned region SB1. Similarly, among the formation regions of the through holes H1, H2, H3, and H4, a rectangular small region including only the formation region of the through hole H2 is defined as a punching planned region SB2, a rectangular small region including only the formation region of the through hole H3 is defined as a punching planned region SB3, and a rectangular small region including only the formation region of the through hole H4 is defined as a punching planned region SB4. Note that in FIG. 5, the through holes H1, H2, H3, and H4 are represented by solid lines, but at the stage when the punching planned regions SB1, SB2, SB3, and SB4 are set, the through holes H1, H2, H3, and H4 are not yet formed. Also, the punching planned regions SB1, SB2, SB3, and SB4 are formed in the recordable region SA on the recording medium P.

[0046] On the first surface P1, let the recording density of the punching planned region SB1 be A1, the recording density of the punching planned region SB2 be A2, the recording density of the punching planned region SB3 be A3, and the recording density of the punching planned region SB4 be A4. Also, on the second surface P2, let the recording density of the punching planned region SB1 be B1, the recording density of the punching planned region SB2 be B2, the recording density of the punching planned region SB3 be B3, and the recording density of the punching planned region SB4 be B4. The recording densities A1, A2, A3, A4, B1, B2, B3, and B4 are estimated in the recording density estimating unit 28 (FIG. 2).

[0047] Next, the control of the control unit 24 in Embodiment 1 will be summarized. Regarding the reference numerals used in each part of the recording system 1 and the recording medium P, refer to FIGS. 1 to 6, and the description of individual figure numbers will be omitted. Based on the information of the recording medium P, the recording information, and the environment information as setting information, the control unit 24 sets at least one of the number of punches per sheet of the recording medium P and the punching speed in the punch unit 40. Also, based on the information of the recording density as the recording information, the control unit 24 sets at least one of the number of punches and the punching speed.

[0048] When the punch unit 40 punches the four planned punching areas SB, the control unit 24 sets at least one of the punching times and the punching speed based on the highest recording density among the recording densities A1, A2, A3, A4, B1, B2, B3, B4 in the four planned punching areas SB1, SB2, SB3, SB4. In the following description, as an example, among the above eight recording densities, it is assumed that the recording density A3 is the highest recording density and the recording density B2 is the lowest recording density. It should be noted that, as an example, the highest recording density on the second surface P2 is B3. When the recording densities in the planned punching areas SB1, SB2, SB3, SB4 are higher than a preset value C, the control unit 24 increases the punching times and the punching speed. In Embodiment 1, as an example, the preset value C is set to a value lower than the recording density B2.

[0049] The control unit 24 uses at least one of temperature and humidity as environmental information. In this embodiment, as an example, the control unit 24 uses both temperature and humidity as environmental information. Further, the control unit 24 uses the thickness of the paper P as information about the paper P. Furthermore, when the thickness of the paper P to be punched is equal to or greater than a predetermined thickness t, the control unit 24 reduces at least one of the punching times and the punching speed, and when the thickness of the paper P is less than the predetermined thickness t, the control unit 24 increases at least one of the punching times and the punching speed.

[0050] The control unit 24 uses the grain direction of the paper P as information about the paper P. Further, in a state where the mode of rotating the punch member 46 is selected, the control unit 24 rotates the blade portion 46A by the drive unit 48 so that the extending direction of the blade portion 46A intersects the grain direction.

[0051] When double-sided printing is performed on both the first surface P1 and the second surface P2, the control unit 24 increases at least one of the punching times and the punching speed compared to at least one of the punching times and the punching speed when single-sided printing is performed on either the first surface P1 or the second surface P2. When double-sided printing is performed, it is considered that the amount of moisture contained per unit area of the paper P increases compared to the case of single-sided printing, and the rigidity of the paper P against the force acting in the punching direction decreases. Therefore, in the recording system 1, punching failure is suppressed by increasing at least one of the number of punches and the punching speed.

[0052] The control unit 24 can be switched from one of the first punching mode and the second punching mode to the other. When switched to the first punching mode, the control unit 24 changes the setting of at least one of the number of punches and the punching speed based on the above-described setting information. When switched to the second punching mode, the control unit 24 does not change the setting of the number of punches and the punching speed. That is, in the recording system 1, as an example, the user can select a first punching mode in which the control unit 24 changes the settings of the number of punches and the punching speed, and a second punching mode in which the number of punches and the punching speed are not forcibly changed. The selection of the first punching mode and the second punching mode by the user is performed from an external device of the recording system 1 or from the operation unit 15.

[0053] FIG. 7 shows an example of each parameter set in the recording system 1. The recording surface of the paper P can be selected as single-sided or double-sided. The thickness of the paper P is 75 g / m as the boundary value of the basis weight 2 、90 g / m 2 is set, and three types of thicknesses can be selected. The grain direction of the paper P can be selected as vertical or horizontal. The size of the paper P is set to 216 mm as the boundary value, and two types of sizes can be selected.

[0054] The temperature can be selected from four temperature ranges with 18 °C, 25 °C, and 35 °C as boundary values. The humidity can be selected from three humidity ranges with 35%, 45%, and 85% as boundary values. The number of punches can be selected as 1, 2, 3, or 4 times. The punching speed is the moving speed during the punching of the punch member 46, and it is possible to select between the normal speed which is 1 times speed and 2 times speed.

[0055] FIG. 8 shows an example of a table showing the punching parameters in the case of single-sided printing recorded only on the first surface P1 in the recording system 1. A plurality of tables of punching parameters as shown in FIG. 8 are provided. Based on each parameter set in the recording system 1, the table showing the punching parameter to be referred to is changed. More specifically, among the parameters shown in FIG. 7, the table of punching parameters to be referred to is changed according to the parameter to be used and its numerical value. In the first embodiment, as an example, the maximum value in the paper P is selected as the recording density. The number of punches is the number of punching processes executed when forming one through hole H. For example, when the number of punches is 2, it means that the punching process is continuously performed 2 times when forming one through hole H. When the recording density is lower than 30%, the number of punches is 1 time. When the recording density is 30% or more and lower than 70%, the number of punches is 2 consecutive times. When the recording density is 70% or more, the number of punches is 3 consecutive times. Also, when the recording density is lower than 30%, the punching speed becomes 1 times the normal speed which is the standard. When the recording density is 30% or more, the punching speed becomes 2 times the normal speed.

[0056] FIG. 9 shows, as an example, a table showing the punching parameters in the case of double-sided printing recorded on the first surface P1 and the second surface P2 in the recording system 1. Similar to FIG. 8, FIG. 9 is also an example of a plurality of provided tables of punching parameters. Note that, similar to FIG. 8, the maximum value in the paper P is selected as the recording density. When the recording density is lower than 30%, the number of punches is 1 time. When the recording density is 30% or more and lower than 70%, the number of punches is 2 consecutive times. When the recording density is 70% or more and lower than 80%, the number of punches is 3 consecutive times. When the recording density is 90% or more, the number of punches is 4 consecutive times. Also, when the recording density is lower than 20%, the punching speed becomes 1 times the normal speed. When the recording density is 20% or more, the punching speed becomes 2 times the normal speed.

[0057] Next, the operation of the recording system 1 of Embodiment 1 will be described. FIG. 10 is a flowchart showing the flow of each process in the first punching mode in which the number of punches and the punching speed are changed according to each setting information, and the second punching mode in which the number of punches and the punching speed are not changed. Note that, regarding each part constituting the recording system 1 and each parameter used in the recording system 1, refer to FIGS. 1 to 9, and the description of individual figure numbers is omitted. Each process shown in FIG. 10 is performed by the CPU 25 reading out and expanding the program PR from the memory 26 and executing it. Note that the recording information has already been transmitted to the control unit 24 by reading in the external device or the scanner unit 12, and it is assumed that the setting information of the recording density has been obtained in the recording density estimation unit 28.

[0058] In step S10, the CPU 25 acquires mode information from the operation unit 15. Then, it proceeds to step S12. In step S12, the CPU 25 determines whether the first punching mode is selected based on the acquired mode information. If the first punching mode is selected (S12: Yes), it proceeds to step S14. If the second punching mode is selected (S12: No), it proceeds to step S36.

[0059] In step S14, the CPU 25 acquires the setting information of the thickness of the paper P from the operation unit 15. Then, it proceeds to step S16. In step S16, the CPU 25 acquires the setting information of the grain direction of the paper P from the operation unit 15. Then, it proceeds to step S18. In step S18, the CPU 25 acquires the setting information of the size of the paper P from the operation unit 15. Then, it proceeds to step S20. In step S20, the CPU 25 acquires the setting information of temperature and humidity from the temperature sensor 21 and the humidity sensor 23, and then proceeds to step S22. In step S22, the CPU 25 acquires the setting information of the recording density from the recording density estimation unit 28, and then proceeds to step S24.

[0060] In step S24, the CPU 25 acquires the setting information of the printing surface from the operation unit 15 and determines whether the printing is single-sided printing or double-sided printing. In the case of single-sided printing (S24: Yes), it proceeds to step S26. In the case of double-sided printing (S24: No), it proceeds to step S28. In step S26, the CPU 25 determines the reference setting table (single-sided) by using the setting information of the thickness, size, temperature, humidity, and recording density of the paper P, and sets the number of punching times and the punching speed in the punching unit 40 from the setting table (single-sided). Then it proceeds to step S32.

[0061] In step S28, the CPU 25 increases the number of punching times and the punching speed in double-sided printing compared to those in single-sided printing. Then it proceeds to step S30. In step S30, the CPU 25 determines the reference setting table (double-sided) by using the setting information of the thickness, size, temperature, humidity, and recording density of the paper P, and determines the number of punching times and the punching speed in the punching unit 40 from the setting table (double-sided). Then it proceeds to step S32.

[0062] In step S32, the CPU 25 determines whether the rotation of the blade part 46A is necessary based on the setting information of the eye direction. If the rotation of the blade part 46A is necessary (S32: Yes), it proceeds to step S34. If the rotation of the blade part 46A is not necessary (S32: No), it proceeds to step S36. In step S34, the CPU 25 controls the drive of the rotating part 43 to rotate the punching member 46, thereby changing the direction of the blade part 46A. The rotation angle is 90° as an example. Then it proceeds to step S36.

[0063] In step S36, the CPU 25 records on the paper P to be conveyed using the recording head 20. Then, it proceeds to step S38. In step S38, the CPU 25 controls the drive of the elevating unit 44 to lower the punching member 46, thereby performing punching on the paper P. The punched paper P is conveyed to the discharge unit 33. Here, since the number of punches and the punching speed are set according to the rigidity, which is one of the states of the paper P, punching defects can be suppressed. Then, the program PR ends. Note that when performing the punching process on the next paper P, it may start from step S10.

[0064] As described above, according to the post-processing unit 30, by setting at least one of the number of punches and the punching speed according to the rigidity of the paper P, for example, even for the paper P with reduced rigidity, holes can be more easily formed in the paper P by increasing the number of punches or the punching speed, so punching defects in the paper P can be suppressed. When the recording density is high, the amount of ink Q adhering to the paper P increases. When the recording density is low, the amount of ink Q adhering to the paper P decreases. Here, according to the post-processing unit 30, by setting at least one of the number of punches and the punching speed based on the recording density, punching can be performed in accordance with the amount of ink Q in the paper P, so punching defects in the paper P can be suppressed.

[0065] According to the post-processing unit 30, since at least one of the number of punches and the punching speed is set according to the position where punching defects are most likely to occur, punching defects in the paper P can be suppressed. According to the post-processing unit 30, even when the possibility of punching defects increases due to an increase in the recording density, at least one of the number of punches and the punching speed is increased, so punching defects can be suppressed.

[0066] According to the post-processing unit 30, when productivity decreases due to an increase in the number of perforations, the productivity can be maintained by increasing the perforation speed. Therefore, the number of perforations can be increased while maintaining the productivity. According to the post-processing unit 30, by using temperature and humidity as environmental information, more perforation defects can be suppressed. According to the post-processing unit 30, by using the thickness of the paper P as information about the paper P, more perforation defects can be suppressed.

[0067] According to the post-processing unit 30, by setting at least one of the number of perforations and the perforation speed in consideration of the thickness of the paper P, more perforation defects can be suppressed. According to the post-processing unit 30, by using the grain direction as information about the paper P, more perforation defects can be suppressed. According to the post-processing unit 30, since the paper P is easily cut when the grain direction intersects with one direction of the blade portion 46A, more perforation defects can be suppressed.

[0068] According to the post-processing unit 30, as recording information, by setting at least one of the number of perforations and the perforation speed in consideration of the information on the recording surface, more perforation defects can be suppressed. Specifically, in the case of double-sided printing, at least one of the number of perforations and the perforation speed increases compared to the case of single-sided printing. Therefore, even if the moisture content of the paper P increases and the rigidity of the paper P decreases, perforation defects can be suppressed. According to the post-processing unit 30, for example, when the user prioritizes higher productivity over the quality of perforations, by switching to the second perforation mode, it is possible to prevent a decrease in productivity. According to the recording system 1, the same operations and effects as those of the post-processing unit 30 can be obtained.

[0069] 〔Embodiment 2〕 Next, the recording system 1 and the post-processing unit 30 of Embodiment 2 will be described with reference to the accompanying drawings. Note that parts common to those of the recording system 1 and the post-processing unit 30 of Embodiment 1 are denoted by the same reference numerals, and the description thereof will be omitted. In the recording system 1 and the post-processing unit 30 of Embodiment 2, the handling of the recording density on the first surface P1 and the second surface P2 is different from that in the recording system 1 and the post-processing unit 30 of Embodiment 1. For configurations other than the handling of the recording density on the first surface P1 and the second surface P2, they are the same as those in Embodiment 1. Therefore, descriptions of individual figure numbers are omitted for FIGS. 1 to 10.

[0070] When recording is performed on the first surface P1 and the second surface P2 of the sheet P by the recording unit 2, the control unit 24 of Embodiment 2 obtains an average value M1 of a first recording density A1 in a perforation planned area SB1 on the first surface P1 and a second recording density B1 in the perforation planned area SB1 on the second surface P2. Similarly, the control unit 24 obtains an average value M2 of a first recording density A2 and a second recording density B2 in the perforation planned area SB2, an average value M3 of a first recording density A3 and a second recording density B3 in the perforation planned area SB3, and an average value M4 of a first recording density A4 and a second recording density B4 in the perforation planned area SB4. Note that illustrations of the average values M1, M2, M3, and M4 are omitted. Also, assume that the average value M3 is the highest value.

[0071] Based on the average values M1, M2, M3, and M4, the control unit 24 sets at least one of the number of perforations and the perforation speed. Specifically, when the punch unit 40 performs perforations within the four perforation planned areas SB1, SB2, SB3, and SB4, the control unit 24 sets at least one of the number of perforations and the perforation speed based on the highest average value M3. Furthermore, when the average values M1, M2, M3, and M4 in the perforation planned areas SB1, SB2, SB3, and SB4 are higher than a predetermined value C, the control unit 24 increases at least one of the number of perforations and the perforation speed. Here, as an example, assume that the average value M3 is higher than the predetermined value C.

[0072] Next, the operations of the recording system 1 and the post-processing unit 30 of Embodiment 2 will be described. FIG. 11 is a flowchart showing the flow of each process in the recording system 1 and the post-processing unit 30 according to Embodiment 2. The points of change from Embodiment 1 are only that step S28 (FIG. 10) is replaced by step S29, and the average value M is used in step S30. For this reason, step S29 and step S30 will be described, and the description of other steps will be omitted.

[0073] If double-sided printing is determined in step S24, the process proceeds to step S29. In step S29, the CPU 25 obtains the aforementioned average values M1, M2, M3, and M4. Here, it is assumed that the highest average value M3 is selected as the representative value. Then, the process proceeds to step S30. In step S30, the CPU 25 determines a setting table (double-sided) for reference by using the setting information of the average value M3 of the thickness, size, temperature, humidity, and recording density of the paper P, and sets the number of punching times and the punching speed in the punching unit 40 from the setting table (double-sided). Then, the process proceeds to step S32.

[0074] According to the recording system 1 and the post-processing unit 30 of Embodiment 2, at least one of the number of punching times and the punching speed is set including not only the first recording density A of the first surface P1 but also the second recording density B of the second surface P2. Therefore, compared with a configuration in which punching is performed based only on the first recording density A, punching defects in the paper P can be suppressed. Also, on the first surface P1 and the second surface P2, at least one of the number of punching times and the punching speed is set based on the average value M3 of the recording density in the punching planned area SB3, which is the position where punching defects are most likely to occur. Therefore, punching defects in the paper P can be suppressed. Furthermore, when the average value M of the recording density is high and the possibility of punching defects occurring is high, at least one of the number of punching times and the punching speed is increased. Therefore, punching defects in the paper P can be suppressed.

[0075] The recording system 1 and the post-processing unit 30 according to Embodiments 1 and 2 of the present invention are basically configured as described above, but it is of course possible to make partial configuration changes, omissions, etc. within the scope not departing from the gist of the present invention.

[0076] In the post-processing unit 30 of Embodiments 1 and 2, two of the information of the sheet P, the recording information, and the environmental information may be used and the remaining one may not be used, or only any one of them may be used. For example, regardless of the information of the sheet P or the recording density, the number of perforations and the perforation speed may be set based only on the environmental information of temperature or humidity. The control unit 24 may set only one of the number of perforations and the perforation speed. Further, the control unit 24 may perform control to reduce the number of perforations and the perforation speed based on the control information. Furthermore, the control unit 24 may determine the number of perforations and the perforation speed based on only one of the temperature and humidity.

[0077] The sheet P is not limited to a vertical orientation, and a horizontal orientation may be used. The number of through holes is not limited to four, and may be any one from one to three, or five or more. The shapes of the through holes H1, H2, H3, and H4 are not limited to circular, and may be elliptical or polygonal. The recording density may reach the maximum not only in the perforation planned area SB3 but also in other areas. When performing perforation a plurality of times, the perforation speed in each time is not limited to being constant, and the perforation speed may be gradually increased or gradually decreased.

Explanation of Reference Numerals

[0078] 1... recording system, 2... recording unit, 4... intermediate unit, 10... image forming unit, 12... scanner unit, 14... cassette housing unit, 15... operation unit, 16... power supply, 17... display unit, 18... housing cassette, 19... conveyance unit, 20... recording head, 21... temperature sensor, 22... ejection unit, 23... humidity sensor, 24... control unit, 25…CPU, 26…Memory, 27…Timer, 28…Recording density estimation unit, 30…Post-processing unit, 32…Housing, 33…Discharge unit, 34…Paper sensor, 36…Conveyor roller pair, 40…Punch unit, 42…Unit body, 43…Rotating part, 44…Lifting part, 45…Die, 46…Punch member, 46A…Cutting edge, 48…Drive part, A1…Recording density, A2…Recording density, A3…Recording density, A4…Recording density, B1…Recording density, B2…Recording density, B3…Recording density, B4…Recording density, C…Predetermined value, H1…Through hole, H2…Through hole, H3…Through hole, H4…Through hole, K…Conveyor path, M1…Average value, M2…Average value, M3…Average value, M4…Average value, P1…First surface, P2…Second surface, Q…Ink, SA…Recordable area, SB1…Perforation planned area, SB2…Perforation planned area, SB3…Perforation planned area, SB4…Perforation planned area, T…Conveyor direction, t…Predetermined thickness

Claims

1. A perforating unit that perforates a medium recorded by a recording unit that discharges a liquid, A control unit that controls the perforating operation of the perforating unit, Comprising, The control unit, Based on setting information including information on the recording density of the perforation planned area on the medium, at least one of the number of perforations per sheet of the medium and the perforation speed in the perforating unit is set, When the recording density in the perforation planned area is higher than a predetermined value, at least one of the number of perforations and the perforation speed is increased, A post-processing device characterized by the above.

2. In the post-processing device according to claim 1, When the perforating unit perforates a plurality of the perforation planned areas, the control unit sets at least one of the number of perforations and the perforation speed based on the highest recording density among the recording densities in the plurality of perforation planned areas, A post-processing device characterized by the above.

3. In the post-processing device according to claim 1, When recording is performed on the first surface of the medium and the second surface opposite to the first surface by the recording unit, the control unit is based on the average value of the first recording density in the perforation planned area on the first surface and the second recording density in the perforation planned area on the second surface. Set at least one of the number of perforations and the perforation speed, A post-processing device characterized by the above.

4. In the post-processing device according to claim 3, When the perforating unit perforates a plurality of the perforation planned areas, the control unit sets at least one of the number of perforations and the perforation speed based on the highest average value among the plurality of average values, A post-processing device characterized by the above.

5. In the post-processing device according to claim 3 or claim 4, When the average value in the perforation planned area is higher than a predetermined value, the control unit increases at least one of the number of perforations and the perforation speed, A post-processing device characterized by the above.

6. In the post-processing device according to claim 1, The control unit increases the number of perforations and the perforation speed, A post-processing device characterized by the above.

7. In the post-processing device according to any one of claims 1 to 6, The control unit uses at least one of temperature and humidity as the setting information, A post-processing device characterized by the above.

8. In the post-processing device according to any one of claims 1 to 7, The control unit uses the thickness of the medium as the setting information, A post-processing device characterized by the above. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

9. In the post-processing apparatus according to claim 8, when the thickness of the medium to be perforated is equal to or greater than a predetermined thickness, the control unit reduces at least one of the number of perforations and the perforation speed described above, and when the thickness of the medium to be perforated is less than the predetermined thickness, the control unit increases at least one of the number of perforations and the perforation speed. The post-processing apparatus is characterized by the above.

10. In the post-processing apparatus according to any one of claims 1 to 9, the medium has vertical or horizontal grain, and the control unit uses the grain direction of the medium as the setting information. The post-processing apparatus is characterized by the above.

11. In the post-processing apparatus according to claim 10, the perforating unit includes a blade portion that is rotatably provided and extends along one direction when viewed from the perforating direction, and a drive unit that rotates the blade portion, and the control unit rotates the blade portion by the drive unit so that the one direction intersects the grain direction. The post-processing apparatus is characterized by the above.

12. In the post-processing apparatus according to any one of claims 1 to 11, the recording unit is capable of performing single-sided printing in which printing is performed on the first surface of the medium or the second surface opposite to the first surface by the recording unit, and double-sided printing in which recording is performed on both the first surface and the second surface, and the single-sided printing or the double-sided printing can be selected. When the double-sided printing is performed, the control unit increases at least one of the number of perforations and the perforation speed in the case of double-sided printing compared to at least one of the number of perforations and the perforation speed in the case of single-sided printing. The post-processing apparatus is characterized by the above.

13. In the post-processing apparatus according to any one of claims 1 to 12, the control unit is switchable from one of a first perforation mode and a second perforation mode to the other, and when switched to the first perforation mode, the control unit changes the setting of at least one of the number of perforations and the perforation speed based on the setting information. When switched to the second perforation mode, the control unit does not change the settings of the number of perforations and the perforation speed. The post-processing apparatus is characterized by the above.

14. A printing apparatus comprising the post-processing apparatus according to any one of claims 1 to 13, and a recording unit that performs recording on a medium conveyed to the post-processing apparatus. The printing apparatus is characterized by the above. ​ ​ ​ ​ ​ ​

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