Patent ID: 12212721

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, first to sixteenth aspects of the present disclosure will be schematically described.

A post-processing device according to a first aspect includes a punching portion that punches a medium on which recording is performed by a recording portion that discharges a liquid, and a controller that controls a punching operation of the punching portion, in which the controller sets at least one of the number of punching and a punching speed per medium in the punching portion based on setting information of at least one of information on the medium related to a rigidity of the medium, recording information in the recording portion, and environmental information.

According to the present aspect, since holes are likely to be formed in the medium by setting at least one of the number of punching and the punching speed according to the rigidity of the medium, for example, by increasing the number of punching or the punching speed even in the medium having reduced rigidity, poor punching in the medium can be suppressed.

In a post-processing device according to a second aspect, in the first aspect, the recording information includes information on a recording density of a scheduled punching area in the medium, and the controller sets at least one of the number of punching and the punching speed based on the information on the recording density.

When the recording density is high, the amount of liquid attached to the medium increases. When the recording density is low, the amount of liquid attached to the medium is reduced.

Here, according to the present aspect, since punching can be performed according to the amount of liquid in the medium by setting at least one of the number of punching and the punching speed based on the recording density, poor punching in the medium can be suppressed.

In a post-processing device according to a third aspect, in the second aspect, when the punching portion performs punching for a plurality of the scheduled punching areas, the controller sets at least one of the number of punching and the punching speed based on the highest recording density among recording densities in the scheduled punching areas.

According to the present aspect, since at least one of the number of punching and the punching speed is set according to a position where poor punching is most likely to occur, the poor punching in the medium can be suppressed.

In a post-processing device according to a fourth aspect, in the second aspect, when recording is performed by the recording portion on a first surface and a second surface opposite to the first surface of the medium, the controller sets at least one of the number of punching and the punching speed, based on an average value of a first recording density in the scheduled punching area on the first surface and a second recording density in the scheduled punching area on the second surface.

According to the present aspect, since at least one of the number of punching and the punching speed is set based on not only the first recording density of the first surface but also the second recording density of the second surface, the poor punching in the medium can be suppressed compared with a configuration in which the punching is performed based only on the first recording density.

In a post-processing device according to a fifth aspect, in the fourth aspect, when the punching portion performs punching for a plurality of the scheduled punching areas, the controller sets at least one of the number of punching and the punching speed based on the highest average value among a plurality of the average values.

According to the present aspect, since at least one of the number of punching and the punching speed is set based on the average value of the recording density at a position where poor punching is most likely to occur, the poor punching in the medium can be suppressed.

In a post-processing device according to a sixth aspect, in the fourth aspect or the fifth aspect, when the average value in the scheduled punching area is higher than a predetermined value, the controller increases at least one of the number of punching and the punching speed.

According to the present aspect, since at least one of the number of punching and the punching speed is increased when the average value of the recording densities is high and there is a high possibility that the poor punching occurs, the poor punching in the medium can be suppressed.

In a post-processing device according to a seventh aspect, in the second aspect or the third aspect, when the recording density in the scheduled punching area is higher than a predetermined value, the controller increases at least one of the number of punching and the punching speed.

According to the present aspect, since at least one of the number of punching and the punching speed is increased even when the possibility that the poor punching occurs increases due to the increase in the recording density, the poor punching can be suppressed.

In a post-processing device according to an eighth aspect, in the sixth aspect or the seventh aspect, the controller increases the number of punching and the punching speed.

According to the present aspect, when productivity is reduced due to the increase in the number of punching, the productivity can be maintained by increasing the punching speed, so that the number of punching can be increased while maintaining the productivity.

In a post-processing device according to a ninth aspect, in any one of the first aspect to the eighth aspect, the controller uses at least one of temperature and humidity as the environmental information.

According to the present aspect, by using at least one of temperature and humidity as the environmental information, the poor punching can be further suppressed.

In a post-processing device according to a tenth aspect, in any one of the first aspect to the ninth aspect, the controller uses a thickness of the medium as information on the medium.

According to the present aspect, by using the thickness of the medium as the information on the medium, the poor punching can be further suppressed.

In a post-processing device according to an eleventh aspect, in the tenth aspect, the controller reduces at least one of the number of punching and the punching speed when the thickness of the medium to be punched is equal to or greater than a predetermined thickness, and increases at least one of the number of punching and the punching speed when the thickness of the medium to be punched is thinner than the predetermined thickness.

According to the present aspect, by setting at least one of the number of punching and the punching speed in consideration of the thickness of the medium, the poor punching can be further suppressed.

In a post-processing device according to a twelfth aspect, in any one of the first aspect to the eleventh aspect, the medium has a long grain or a short grain, and the controller uses a grain direction of the medium as information on the medium.

According to the present aspect, by using the grain direction of the medium, the poor punching can be further suppressed.

In a post-processing device according to a thirteenth aspect, in the twelfth aspect, the punching portion has a blade portion that is rotatably provided and extends in one direction when viewed in a punching direction, and a driving portion that rotates the blade portion, and the controller rotates the blade portion by the driving portion so that the one direction and the grain direction intersect.

According to the present aspect, since the medium is easily cut by intersecting the grain direction and the one direction of the blade portion, the poor punching can be further suppressed.

In a post-processing device according to a fourteenth aspect, in any one of the first aspect to the thirteenth aspect, the recording portion is configured to perform single-sided printing in which printing is performed on the first surface or the second surface opposite to the first surface of the medium by the recording portion, 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 is selected as the recording information, and the controller increases at least one of the number of punching and the punching speed when the double-sided printing is performed as compared to at least one of the number of punching and the punching speed when the single-sided printing is performed.

According to the present aspect, by setting at least one of the number of punching and the punching speed in consideration of the information on the recording surface as the recording information, the poor punching can be further suppressed.

In a post-processing device according to a fifteenth aspect, in any one of the first aspect to the fourteenth aspect, the controller is configured to switch from one of a first punching mode and a second punching mode to another of the first punching mode and the second punching mode, when the mode is switched to the first punching mode, the controller changes a setting of at least one of the number of punching and the punching speed based on the setting information, and when the mode is switched to the second punching mode, the controller does not change settings of the number of punching and the punching speed.

According to the present aspect, for example, when the user prioritizes high productivity over quality of punching, it is possible to prevent a decrease in productivity by switching the mode to the second punching mode.

A printing device according to a sixteenth aspect includes the post-processing device according to any one of the first aspect to the fifteenth aspect, and the recording portion that performs recording on the medium to be transported to the post-processing device.

According to the present aspect, the same action and effect as any one of the first aspect to the fifteenth aspect can be obtained.

Hereinafter, an example of the post-processing device and the printing device according to the present disclosure will be specifically described.

First Embodiment

FIG.1illustrates a recording system1which is an example of a printing device. The recording system1is configured as an ink jet device that preforms recording by discharging ink Q, which is an example of a liquid, onto paper P, which is an example of a medium.

The paper P is formed in a rectangular shape having a long side and a short side. Further, as an example, the paper P has a long grain in which fibers flow along the long side. The grain direction of the paper P is not limited to the long grain, but may be a short grain. Information on the grain direction is set in a manipulation portion15(FIG.2) described later.

In an X-Y-Z coordinate system represented in each figure, an X direction is a width direction of a device, a Y direction is a depth direction of a device, and a Z direction is a height direction of a device. The X direction, the Y direction, and the Z direction are orthogonal to each other. The Y direction is an example of a width direction of the paper P. The Z direction is an example of a punching direction. When the recording system1is viewed from the front and the left and the right are distinguished with respect to the center in the width direction of the device, the left is a +X direction side and the right is a −X direction side. When the front and the back are distinguished with respect to the center in the depth direction of the device, the front is a +Y direction side and the back is a −Y direction side. When the upper side and the lower side are distinguished with respect to the center in the height direction of the device, the upper side is a +Z direction side and the lower side is a −Z direction side.

The recording system1has a recording unit2, an intermediate unit4, and a post-processing unit30in this order in the +X direction. In the recording system1, the recording unit2, the intermediate unit4, and the post-processing unit30are mechanically and electrically coupled to each other. The intermediate unit4transports the paper P fed from the recording unit2to the post-processing unit30. The recording system1is configured to perform post-processing described later on the paper P on which information is recorded in an image forming portion10described later. A path through which the paper P is transported in the recording system1is defined as a transport path K.

The recording system1may further include a manipulation portion15(FIG.2) manipulated by the user and a display portion17(FIG.2) on which various pieces of information of the recording system1is displayed. In the present embodiment, as an example, the manipulation portion15and the display portion17are provided in the recording unit2.

As an example, the manipulation portion15and the display portion17are configured as one touch panel, are configured to be able to execute a manipulation of each unit of the recording system1, and are configured to be able to set various pieces of information. The various pieces of information include the thickness, grain direction, size, and printing surface of the paper P.

The thickness, grain direction, and size of the paper P are examples of information on the medium related to a change in rigidity of the paper P.

The transport direction of the paper P is illustrated by an arrow T. In the following description, the transport direction of the paper P is simply referred to as a transport direction. The transport direction is not constant, and an angle with respect to a horizontal direction changes depending on a position of the paper P in the transport path K.

The recording unit2is an example of the recording portion, and records various pieces of information on the paper P to be transported to the post-processing unit30. The paper P is formed in the form of a sheet. Further, the recording unit2may include an image forming portion10, a scanner portion12, a cassette accommodating portion14, a power supply16, and a transport portion19.

As an example, the image forming portion10may be configured to include a recording head20and a controller24.

The scanner portion12reads information on a document (not illustrated). The cassette accommodating portion14has a plurality of accommodating cassettes18accommodating a plurality of papers P.

The recording head20is configured as a line head as an example. Further, the recording head20includes a discharge portion22including a plurality of nozzles (not illustrated). The discharge portion22performs recording by discharging ink Q onto the transported paper P.

As illustrated inFIG.2, the controller24that functions as a computer includes a central processing unit (CPU)25, a memory26, a timer27that can measure time or hour based on each time point, a recording density estimation portion28, and a storage (not illustrated). Further, the controller24controls various operations in each portion of the recording system1.

The controller24controls a transport operation of the paper P by the transport portion19, a recording operation on the paper P by the recording head20, and a punching operation of the punch unit40based on information input to the controller24from the outside of the recording system1or from the manipulation portion15. Further, the controller24controls the discharging of the ink Q in the discharge portion22based on image data as recording information. A specific control of the punch unit40by the controller24will be described later.

The memory26is an example of a storage portion and stores various types of data. Various types of data including a program PR executed by the CPU25are stored in the memory26. In other words, the memory26is an example of a recording medium in which a computer-readable program PR is stored. Other examples of the recording medium include a compact disc (CD), a digital versatile disc (DVD), a Blu-ray disc, and a universal serial bus (USB) memory. Further, a program PR can be expanded in a part of the memory26.

The program PR is a program for causing the CPU25to execute each step described later in the recording system1.

In the present embodiment, the recording density means a ratio [unit %] of the number of dots actually printed to the maximum number of dots that can be printed with ink Q in a recordable area SA (FIG.4) of the paper P described later. In other words, the controller24estimates the amount of ink Q discharged from the discharge portion22(FIG.1) by estimating the recording density.

The recording density estimation portion28estimates the recording density based on the recording information on the scheduled punching areas SB1, SB2, SB3, and SB4(FIG.5) on the paper P. In the present embodiment, the information on the recording densities in the scheduled punching area SB1, SB2, SB3, and SB4on the paper P is an example of the recording information related to the rigidity of the paper P. The scheduled punching areas SB1, SB2, SB3, and SB4will be described later.

Information on the printing surface set by the manipulation portion15includes 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 paper P is referred to as a first surface P1(FIG.4), and a surface opposite to the first surface P1is referred to as a second surface P2(FIG.4). The single-sided printing is printing in which recording is performed on the first surface P1or the second surface P2by the recording unit2. The double-sided printing is printing in which recording is performed on both the first surface P1and the second surface P2by the recording unit2. In this way, the recording unit2can execute the single-sided printing and the double-sided printing.

In the manipulation portion15, the single-sided printing or the double-sided printing can be selected by the user.

The recording system1is further provided with a temperature sensor21and a humidity sensor23. The temperature sensor21is an example of a temperature measuring portion, and measures a temperature inside the device of the recording system1. In the present embodiment, the temperature sensor21is provided inside the recording unit2. Temperature information obtained by the temperature sensor21is transmitted to the controller24.

The humidity sensor23is an example of a humidity measuring portion, and measures humidity inside the device of the recording system1. In the present embodiment, the humidity sensor23is provided inside the recording unit2. Humidity information obtained by the humidity sensor23is transmitted to the controller24.

The temperature information and the humidity information are examples of environmental information related to the change in the rigidity of the paper P, respectively.

It should be noted that the above-mentioned medium information, recording information, and environmental information are collectively referred to as “setting information” from a viewpoint of setting the conditions for punching processing described later.

As illustrated inFIG.1, the transport portion19is provided in an entirety of the recording system1. Further, the transport portion19is configured to include a plurality of roller pairs (not illustrated) and a plurality of motors, and transports the paper P in the transport direction. Specifically, the transport portion19transports the paper P from the accommodating cassette18to the recording area of the recording head20, and further transports the paper P from the recording area to the post-processing unit30via the intermediate unit4.

The post-processing unit30is an example of the post-processing device, and is configured to include a controller24, a housing32, a discharge portion33, a paper sensor34(FIG.2), a punch unit40, and a pair of transport rollers36. As an example, the controller24also serves as a controller for the post-processing unit30. The transport path K for transporting the paper P by the transport portion19is formed inside the housing32. The paper P received from the intermediate unit4is transported along the transport path K and discharged to the discharge portion33.

The punch unit40is an example of the punching portion, and punches the paper P on which recording is performed by the recording unit2. In other words, the punch unit40performs shearing processing on the paper P. Further, the punch unit40is provided at a lower portion of the housing32. A portion of the transport path K that faces the punch unit40is, for example, along the X direction. As a result, the portion to be punched in the paper P is arranged along a substantially horizontal direction.

The paper sensor34(FIG.2) is provided upstream of the punch unit40in the transport direction. As an example, the paper sensor34includes an exit portion (not illustrated) and a light receiving portion (not illustrated). Then, the paper sensor34detects a passing time point of the paper P in the paper sensor34and a stop position of the paper P with respect to the punch unit40by determining whether or not the light from the exit portion is received by the light receiving portion.

The pair of transport rollers36is provided downstream of the punch unit40in the transport direction. The pair of transport rollers36is rotated to transport the paper P downstream in the transport direction.

As illustrated inFIG.3, the punch unit40includes a unit body42, a die45as a pedestal portion, four punch members46, and a driving portion48. As an example of the punching processing, the punch unit40forms through holes H at four positions arranged in the Y direction at an end portion of the paper P in a −X direction.

The unit body42supports the punch members46. Further, the unit main body42is provided with a rotating portion43and an elevating portion44(FIG.2) therein.

The rotating portion43rotates the punch members46by 90° around a central axis along the Z direction when viewed in the Z direction. The presence or absence of rotation is determined based on the grain direction of the paper P and an arrangement direction of a blade portion46A (FIG.6) of the punch member46.

The elevating portion44is configured to include an electromagnetic switch (not illustrated) and a cylinder (not illustrated), and raises and lowers the punch members46in the Z direction.

The rotating portion43and the elevating portion44may be integrated like a clamp cylinder.

As illustrated inFIG.6, the punch member46is formed in a cylindrical shape whose central axis is along the Z direction. Two blade portions46A are formed at the ends of the punch member46in the −Z direction at intervals in the Y direction. The two blade portions46A are rotatably provided around the central axis of the punch member46. InFIG.6, as an example, the two blade portions46A extend substantially along the X direction as an example of one direction when viewed in the Z direction. Further, the two blade portions46A extend in the X direction intersecting the Y direction along which the long grains of the paper P are aligned.

When the punch member46is driven in the −Z direction by the driving portion48, the punch member46forms a through hole H (FIG.3) by applying a shearing force in the −Z direction to the paper P on which the ink Q is discharged.

As illustrated inFIG.2, the driving portion48includes a motor (not illustrated) and a cam (not illustrated), and drives the rotating portion43to rotate the blade portion46A. Further, the driving portion48drives the elevating portion44to raise the punch member46in the +Z direction or lowers the punch member46in the −Z direction.

As illustrated inFIG.4, in the paper P, the recordable area is referred to as a recordable area SA. InFIG.4, the recordable area SA is represented by an alternate long and short dash line. Further, inFIG.4, as an example, the paper P in the case of bordered printing is illustrated.

The four circular through holes H1, H2, H3, and H4corresponding to the four punch members46(FIG.3) are formed inside the recordable area SA. In the present embodiment, as an example, the recordable region SA is also set inside the four through holes H1, H2, H3, and H4. The through holes H1, H2, H3, and H4are arranged in this order from the +Y direction to the −Y direction.

As illustrated inFIG.5, as an example, among the areas where the through holes H1, H2, H3, and H4are formed, a small rectangular area including only the area where the through hole H1is formed is designated as a scheduled punching area SB1. Similarly, among the areas where the through holes H1, H2, H3, and H4are formed, a small rectangular area including only the area where the through hole H2is formed is designated as a scheduled punching area SB2, a small rectangular area including only the area where the through hole H3is formed is designated as a scheduled punching area SB3and a small rectangular area including only the area where the through hole H4is formed is designated as a scheduled punching area SB4. InFIG.5, the through holes H1, H2, H3, and H4are represented by solid lines, but when the scheduled punching areas SB1, SB2, SB3, and SB4are set, the through holes H1, H2, H3, and H4are not formed. Further, the scheduled punching areas SB1, SB2, SB3, and SB4are formed in the recordable area SA.

On the first surface P1, recording density of the scheduled punching area SB1is A1, recording density of the scheduled punching area SB2is A2, recording density of the scheduled punching area SB3is A3, and recording density of the scheduled punching area SB4is A4. On the second surface P2, recording density of the scheduled punching area SB1is B1, recording density of the scheduled punching area SB2is B2, recording density of the scheduled punching area SB3is B3, and recording density of the scheduled punching area SB4is B4.

The recording densities A1, A2, A3, A4, B1, B2, B3, and B4are estimated by the recording density estimation portion28(FIG.2).

Next, the control of the controller24of the first embodiment will be summarized. Regarding the reference numerals used in each portion of the recording system1and the paper P, the description of individual drawing numbers will be omitted by referring toFIGS.1to6.

The controller24sets at least one of the number of punching and the punching speed per paper P in the punch unit40based on the information on the paper P, the recording information, and the environmental information as the setting information. Further, the controller24sets at least one of the number of punching and the punching speed as the recording information based on information on the recording density.

When the punch unit40performs the punching on the four scheduled punching areas SB, the controller24sets at least one of the number of punching and the punching speed based on the highest recording density among the recording densities A1, A2, A3, A4, B1, B2, B3, and B4in the four scheduled punching areas SB1, SB2, SB3, and SB4. In the following description, as an example, the recording density A3is the highest recording density and the recording density B2is the lowest recording density among the above eight recording densities. The highest recording density on the second surface P2is B3as an example.

When the recording densities in the scheduled punching areas SB1, SB2, SB3, and SB4are higher than a preset predetermined value C, the controller24increases the number of punching and the punching speed. In the first embodiment, as an example, the predetermined value C is set to a value less than the recording density B2.

The controller24uses at least one of temperature and humidity as the environmental information. In the present embodiment, as an example, the controller24uses both the temperature and the humidity as the environmental information. Further, the controller24uses the thickness of the paper P as the information on the paper P. Further, the controller24reduces at least one of the number of punching and the punching speed when the thickness of the paper P to be punched is a predetermined thickness t or more, and increases at least one of the number of punching and the punching speed when the thickness of the paper P is thinner than the predetermined thickness t.

The controller24uses the grain direction of the paper P as the information on the paper P. Further, the controller24rotates the blade portion46A by the driving portion48so that the extending direction of the blade portion46A and the grain direction intersect with each other in a state in which a mode for rotating the punch member46is selected.

The controller24increases at least one of the number of punching and the punching speed when double-sided printing of the first surface P1and the second surface P2is performed, as compared to at least one of the number of punching and the punching speed when single-sided printing of the first surface P1or the second surface P2is performed.

It is considered that when the double-sided printing is performed, the amount of water contained per unit area of paper P increases and the rigidity of paper P against the force acting in the punching direction decreases as compared with the case in which the single-sided printing is performed. Therefore, in the recording system1, the poor punching is suppressed by increasing at least one of the number of punching and the punching speed.

The controller24can switch from one of a first punching mode and a second punching mode to the other.

When the mode is switched to the first punching mode, the controller24changes the setting of at least one of the number of punching and the punching speed based on the setting information described above.

When the mode is switched to the second punching mode, the controller24does not change the settings of the number of punching and the punching speed.

That is, in the recording system1, as an example, the user can select the first punching mode in which the controller24changes the settings of the number of punching and the punching speed, and the second punching mode in which the number of punching 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 through the external device of the recording system1or through the manipulation portion15.

FIG.7illustrates an example of each parameter set in the recording system1.

As the recording surface of the paper P, one side and both sides can be selected.

The thickness of the paper P is set to 75 g/m2and 90 g/m2as a boundary value of a basis weight, and three types of thickness can be selected.

As the grain direction of the paper P, a long grain and a short grain can be selected.

The size of the paper P is set to 216 mm as a boundary value, and two types of sizes can be selected.

Four kinds of temperature ranges including temperatures of 18° C., 25° C., and 35° C. as boundary values can be selected.

Three types of humidity ranges including humidity of 35%, 45%, and 85% as boundary values can be selected.

As the number of punching, 1, 2, 3, and 4 times can be selected.

The punching speed is a moving speed of the punch member46at the time of punching, and a normal speed, which is 1× speed, and a 2× speed can be selected.

FIG.8illustrates an example of a table illustrating punching parameters in a case of single-sided printing in which recording is performed only on the first surface P1in the recording system1. A plurality of tables of punching parameters as illustrated inFIG.8are provided. Based on each parameter set in the recording system1, the table illustrating the punching parameters to be referred to is changed. More specifically, the table of punching parameters to be referred to is changed depending on the parameters used among the parameters illustrated inFIG.7and their numerical values. In the first embodiment, a maximum value of the recording density on the paper P is selected as an example.

The number of punching is the number of punching processing performed when forming one through hole H. For example, when the number of punching is two, it means that the punching processing is continuously performed twice when forming one through hole H.

When the recording density is less than 30%, the number of punching is set to one. When the recording density is 30% or more and less than 70%, the number of punching is set to two consecutive times. When the recording density is 70% or more, the number of punching is set to three consecutive times.

Further, when the recording density is less than 30%, the punching speed is 1 times a standard normal speed. When the recording density is 30% or more, the punching speed is twice the normal speed.

FIG.9illustrates, as an example, a table illustrating punching parameters in a case of double-sided printing in which recording is performed on the first surface P1and the second surface P2in the recording system1. Similarly toFIG.8,FIG.9is also an example of a table in which a plurality of punching parameters are provided. As inFIG.8, it is assumed that the maximum value of the recording density on the paper P is selected.

When the recording density is less than 30%, the number of punching is set to one. When the recording density is 30% or more and less than 70%, the number of punching is set to two consecutive times. When the recording density is 70% or more and less than 80%, the number of punching is set to three consecutive times. When the recording density is 90% or more, the number of punching is set to four consecutive times.

Further, when the recording density is less than 20%, the punching speed is 1 times of a normal speed. When the recording density is 20% or more, the punching speed is twice of the normal speed.

Next, an operation of the recording system1of the first embodiment will be described.

FIG.10is a flowchart illustrating a flow of each processing in the first punching mode in which the number of punching and the punching speed in the paper P are changed according to each setting information, and the second punching mode in which the number of punching and the punching speed are not changed. For each portion constituting the recording system1and each parameter used in the recording system1, the description of individual drawing numbers will be omitted by referring toFIGS.1to9.

Each processing illustrated inFIG.10is performed by the CPU25reading and expanding the program PR from the memory26and executing the program PR. It is assumed that the recording information has already been transmitted to the controller24by being read by the external device or the scanner portion12, and the recording density estimation portion28has obtained setting information on the recording density.

In step S10, the CPU25acquires mode information from the manipulation portion15. Then, the processing proceeds to step S12.

In step S12, the CPU25determines whether or not a first punching mode is selected based on the acquired mode information. When the first punching mode is selected (S12: Yes), the processing proceeds to step S14. When a second punching mode is selected (S12: No), the processing proceeds to step S36.

In step S14, the CPU25acquires setting information on the thickness of the paper P from the manipulation portion15. Then, the processing proceeds to step S16.

In step S16, the CPU25acquires setting information on the grain direction of the paper P from the manipulation portion15. Then, the processing proceeds to step S18.

In step S18, the CPU25acquires setting information on the size of the paper P from the manipulation portion15. Then, the processing proceeds to step S20.

In step S20, the CPU25acquires setting information on the temperature and the humidity from the temperature sensor21and the humidity sensor23. Then, the processing proceeds to step S22.

In step S22, the CPU25acquires setting information on the recording density from the recording density estimation portion28. Then, the processing proceeds to step S24.

In step S24, the CPU25acquires setting information on the printing surface from the manipulation portion15and determines whether the printing is single-sided printing or double-sided printing. When the printing is the single-sided printing (S24: Yes), the processing proceeds to step S26. When the printing is the double-sided printing (S24: No), the processing proceeds to step S28.

In step S26, the CPU25determines a setting table (one side) to be referred to by using each setting information on the thickness, size, temperature and humidity, and recording density of the paper P, and sets the number of punching and the punching speed in the punch unit40from the setting table (one side). Then, the processing proceeds to step S32.

In step S28, the CPU25increases the number of punching and the punching speed in the double-sided printing more than the number of punching and punching speed in the single-sided printing. Then, the processing proceeds to step S30.

In step S30, the CPU25determines a setting table (double-sided) to be referred to by using each setting information on the thickness, size, temperature and humidity, and recording density of the paper P, and sets the number of punching and the punching speed in the punch unit40from the setting table (double-sided). Then, the processing proceeds to step S32.

In step S32, the CPU25determines whether or not the blade portion46A needs to be rotated based on the setting information in the grain direction. When the blade portion46A needs to be rotated (S32: Yes), the processing proceeds to step S34. When the blade portion46A does not need to be rotated (S32: No), the processing proceeds to step S36.

In step S34, the CPU25changes the direction of the blade portion46A by controlling the driving of the rotating portion43to rotate the punch member46. The rotation angle is 90° as an example. Then, the processing proceeds to step S36.

In step S36, the CPU25performs the recording on the transported paper P using the recording head20. Then, the processing proceeds to step S38.

In step S38, the CPU25executes the punching on the paper P by controlling the driving of the elevating portion44to lower the punch member46. The punched paper P is transported to the discharge portion33. Here, since the number of punching and the punching speed are set according to the rigidity, which is one of the states of the paper P, poor punching can be suppressed. Then, the program PR is terminated.

When the next paper P is punched, processing may be started from step S10.

As described above, according to the post-processing unit30, by setting at least one of the number of punching and the punching speed according to the rigidity of the paper P, for example, even when the paper P has a low rigidity, since holes can be easily formed in the paper P by increasing the number of punching or the punching speed, the poor punching in the paper P can be suppressed.

When the recording density is high, the amount of ink Q attached to the paper P increases. When the recording density is low, the amount of ink Q attached to the paper P decreases. Here, according to the post-processing unit30, since punching can be performed according to the amount of ink Q in the paper P by setting at least one of the number of punching and the punching speed based on the recording density, the poor punching in the paper P can be suppressed.

According to the post-processing unit30, since at least one of the number of punching and the punching speed is set according to a position where the poor punching is most likely to occur, the poor punching in the paper P can be suppressed.

According to the post-processing unit30, since at least one of the number of punching and the punching speed is increased even when the possibility that the poor punching occurs increases due to the increase in the recording density, the poor punching can be suppressed.

According to the post-processing unit30, when productivity is reduced due to the increase in the number of punching, the productivity can be maintained by increasing the punching speed, so that the number of punching can be increased while maintaining the productivity.

According to the post-processing unit30, by using the temperature and the humidity as the environmental information, the poor punching can be further suppressed.

According to the post-processing unit30, by using the thickness of the paper P as the information on the paper P, the poor punching can be further suppressed.

According to the post-processing unit30, by setting at least one of the number of punching and the punching speed in consideration of the thickness of the paper P, the poor punching can be further suppressed.

According to the post-processing unit30, by using the grain direction as the information on the paper P, the poor punching can be further suppressed.

According to the post-processing unit30, since the paper P is easily cut by intersecting the grain direction and one direction of the blade portion46A, the poor punching can be further suppressed.

According to the post-processing unit30, by setting at least one of the number of punching and the punching speed in consideration of the information on the recording surface as the recording information, the poor punching can be further suppressed. Specifically, in the case of double-sided printing, since at least one of the number of punching and the punching speed is increased as compared with the case of single-sided printing, the poor punching can be suppressed even when the amount of water of the paper P increases and the rigidity of the paper P decreases.

According to the post-processing unit30, for example, when the user prioritizes high productivity over quality of punching, it is possible to prevent a decrease in productivity by switching the mode to the second punching mode.

According to the recording system1, the same operations and effects as those of the post-processing unit30can be obtained.

Second Embodiment

Next, a recording system1and a post-processing unit30of a second embodiment will be described with reference to the accompanying drawings. The portions common to each portion of the recording system1and each portion of the post-processing unit30of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The recording system1and the post-processing unit30of the second embodiment differ in the handling of the recording densities on the first surface P1and the second surface P2in the recording system1and the post-processing unit30of the first embodiment. The configurations other than the handling of the recording densities on the first surface P1and the second surface P2are the same as the configurations of the first embodiment. Therefore, the description of individual drawing numbers is omitted forFIGS.1to10.

When the recording unit2performs recording on the first surface P1and the second surface P2of the paper P, the controller24of the second embodiment obtains an average value M1of the first recording density A1in the scheduled punching area SB1on the first surface P1and the second recording density B1in the scheduled punching area SB1on the second surface P2. Similarly, the controller24obtains an average value M2of the first recording density A2and the second recording density B2in the scheduled punching area SB2, an average value M3of the first recording density A3and the second recording density B3in the scheduled punching area SB3, and an average value M4of the first recording density A4and the second recording density B4in the scheduled punching area SB4. The average values M1, M2, M3, and M4are not illustrated. Further, it is assumed that the average value M3is the highest value.

The controller24sets at least one of the number of punching and the punching speed based on the average values M1, M2, M3, and M4. Specifically, when the punch unit40performs the punching on the four scheduled punching areas SB1, SB2, SB3, and SB4, the controller24sets at least one of the number of punching and the punching speed based on the highest average value M3.

When the average values M1, M2, M3, and M4in the scheduled punching areas SB1, SB2, SB3, and SB4are higher than a predetermined value C, the controller24increases at least one of the number of punching and the punching speed. Here, as an example, it is assumed that the average value M3is higher than the predetermined value C.

Next, the operations of the recording system1and the post-processing unit30of the second embodiment will be described.

FIG.11is a flowchart illustrating a flow of each processing in the recording system1and the post-processing unit30of the second embodiment. The changes from the first embodiment are that step S28(FIG.10) is replaced with step S29and that the average value M is used in step S30. Therefore, steps S29and S30will be described, and the description of other steps will be omitted.

When the double-sided printing is determined in step S24, the processing proceeds to step S29.

In step S29, the CPU25obtains the above-mentioned average values M1, M2, M3, and M4. Here, it is assumed that the highest average value M3is selected as a representative value. Then, the processing proceeds to step S30.

In step S30, the CPU25determines a setting table (double-sided) to be referred to by using each setting information on the thickness, size, temperature and humidity, and the average value M3of the recording density of the paper P, and sets the number of punching and the punching speed in the punch unit40from the setting table (double-sided). Then, the processing proceeds to step S32.

According to the recording system1and the post-processing unit30of the second embodiment, since at least one of the number of punching and the punching speed is set based on not only the first recording density A of the first surface P1but also the second recording density B of the second surface P2, the poor punching in the paper P can be suppressed compared with the configuration in which the punching is performed based only on the first recording density A.

Further, on the first surface P1and the second surface P2, since at least one of the number of punching and the punching speed is set based on the average value M3of the recording densities of the scheduled punching area SB3, which is the position where the possibility of poor punching is highest, respectively, the poor punching in the paper P can be suppressed.

Further, when the average value M of the recording densities is high and there is a high possibility that the poor punching occurs, at least one of the number of punching and the punching speed is increased, so that the poor punching in the paper P can be suppressed.

The recording system1and the post-processing unit30according to the first and second embodiments of the present disclosure are basically having the configuration as described above, but, for example, it is also possible to change or omit a partial configuration within a range that does not deviate from the gist of the present disclosure.

In the post-processing unit30of the first and second embodiments, two of the information on the paper P, the recording information, and the environmental information may be used and the remaining one may not be used, or only one thereof may be used. For example, the number of punching and the punching speed may be set based only on the environmental information on the temperature or the humidity regardless of the information on the paper P and the recording density.

The controller24may set only one of the number of punching and the punching speed. Further, the controller24may perform control to reduce the number of punching and the punching speed based on the control information. Further, the controller24may determine the number of punching and the punching speed based on only one of the temperature and the humidity.

The paper P is not limited to the long grain, and paper having a short grain 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 shape of the through holes H1, H2, H3, and H4is not limited to a circular shape, and may be an elliptical shape or a polygonal shape.

The maximum recording density is not limited to the scheduled punching area SB3, and may be other areas.

When the punching is performed a plurality of times, the punching speed is not limited to a constant value each time, and the punching speed may be gradually increased or the punching speed may be gradually decreased.