Aftertreatment Device

Abstract

To solve the problem that removal of punched chips using only a brush increases time and effort of a user.SOLUTION: A post-processing device comprises a conveyance path having a first path forming member forming a path that opposes to a first surface of a medium and a second path forming member forming a path that opposes to a second surface of the medium, on which the medium recorded by a recording part is conveyed, and a punching member, provided on the conveyance path, which performs punching to the medium. The conveyance path has a first conveyance path provided at a downstream in a conveying direction of the punching member and a second conveyance path connected to the downstream in the conveying direction of the first conveyance path. The second conveyance path is formed in a curve shape which enables that path to hold the medium in a bent posture. The first path forming member constituting the second conveyance path has an outside in a curve-shape formed and is arranged at a position that is away from the first surface more than the first path forming member constituting the first conveyance path. An end portion at an upstream in the conveying direction of the medium, which is held in the bent posture, moves from the first conveyance path to the second conveyance path.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a post-processing device that punches holes in a medium. [Background technology]

[0002] Punch holes are made in, or perforated, a sheet of media by moving a punch needle back and forth through the media. Ideally, the punch waste, which is the portion of the media that corresponds to the punched holes, is separated from the media and collected. However, some of the punch waste may not be completely severed from its connection to the media and remain on the media, or may become attached to the media due to static electricity or other factors. If the punch waste is transported downstream along with the media on the transport path, it may eventually find its way into various mechanisms within the device and cause malfunctions in various parts.

[0003] Here, in a punch processing device that punches punch holes in each sheet of paper by moving a punch pin back and forth relative to a punch die, a configuration is disclosed in which a brush-like member is provided near the opening on the underside of the punch die to scrape punch residue from the punch pin (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-200592 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a configuration in which a brush is used to remove drilling debris, the user must replace the brush when the brush wears out, which is troublesome for the user. Therefore, there is room for further improvement in terms of improving user convenience with respect to the configuration for actively removing drilling debris from the medium. [Means for solving the problem]

[0006] The post-processing device has a first path forming member that forms a path facing a first side of a medium and a second path forming member that forms a path facing a second side of the medium, and is equipped with a transport path along which the medium recorded by a recording unit is transported, and a punching member that is provided on the transport path and punches holes in the medium, the transport path having a first transport path provided downstream of the punching member in the transport direction and a second transport path connected downstream of the first transport path in the transport direction, the second transport path being formed to be capable of holding the medium in a curved position by having a curved shape, the first path forming member that constitutes the second transport path forms the outside of the curved shape and is positioned at a position farther away from the first side than the first path forming member that constitutes the first transport path, opening the transport path downward so that punch waste generated from the medium by punching falls; When the medium is in the curved position, an upstream end in the transport direction moves from the first transport path to the second transport path. The post-processing device includes a first path forming member that forms a path facing a first side of a medium, and a second path forming member that forms a path facing a second side of the medium, and includes a transport path along which the medium recorded by a recording unit is transported, and a punching member that is provided on the transport path and punches holes in the medium, the transport path including a first transport path provided downstream of the punching member in a transport direction, and a second transport path connected downstream of the first transport path in the transport direction, the second transport path being formed to have a curved shape so as to be able to hold the medium in a curved position, the first path forming member that constitutes the second transport path forms the outside of the curved shape, and the first path forming member that constitutes the first transport path forms the outside of the curved shape. The post-processing device is arranged at a position farther away from the first surface than a first path forming member, and when the medium is in the curved posture, an end portion upstream in the transport direction moves from the first transport path to the second transport path, and the post-processing device further includes a control unit that controls the movement of the first path forming member that constitutes the second transport path, and the control unit is capable of moving the first path forming member that constitutes the second transport path between a first position and a second position farther away from the first surface than the first position, and moves the first path forming member that constitutes the second transport path to the first position or the second position based on recording information on the medium by the recording unit or environmental information of the environment in which the post-processing device is placed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a simplified diagram showing a post-processing device according to the first embodiment. [Diagram 2] 11 is a flowchart showing a punching process. [Diagram 3] FIG. 13 is a simplified diagram showing a post-processing device according to a second embodiment. [Figure 4] 13 is a flowchart showing a movement control process for the curved outer member. [Diagram 5] FIG. 13 is a diagram showing an example of an environment table for determining an environment concentration table. [Figure 6] FIG. 13 is a diagram showing an example of an environment concentration table for each environment. [Figure 7] FIG. 13 is a simplified diagram showing a post-processing device according to a third embodiment. [Figure 8] FIG. 13 is a simplified diagram showing a post-processing device according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that each drawing is merely an example for explaining the present embodiment. Since each drawing is an example, the proportions and shapes may not be accurate, the drawings may not match each other, and some parts may be omitted.

[0009] 1. First embodiment: Fig. 1 shows a simplified configuration of post-processing device 10 according to the first embodiment from a side perspective perpendicular to the transport direction D1 of medium S. Fig. 1 also shows post-processing device 10 in state SA, which is the state immediately before punching holes in medium S, and state SB, which is the state after punching has progressed to a certain extent in transport of medium S. Post-processing device 10 may also be called a punching device, a hole punching device, etc.

[0010] The post-processing device 10 includes a transport path 20, a punching member 30, and a pair of transport rollers 40, 41. The transport path 20 is a path along which the medium S is transported, and the transport direction D1 is a direction along the transport path 20. The upstream and downstream of the transport direction D1 are simply referred to as upstream and downstream. The medium S is a sheet-like medium. The medium S is typically paper, but may be any medium that can be subject to punching, and may be a medium made of a material other than paper.

[0011] The punching member 30 is provided midway along the transport path 20, and punches holes in the medium S transported from upstream. The punching member 30 has a punch needle 31 and a punch table 33 in which a punch needle hole 32 for accommodating the punch needle 31 is formed. The punch needle 31 and the punch table 33 face each other vertically across the transport path 20. The upper punch needle 31 moves toward and away from the lower punch needle hole 32, thereby forming a punch hole in the medium S located between the punch needle 31 and the punch needle hole 32 as shown in state SA.

[0012] Of the two surfaces of the medium S, one surface is referred to as the first surface SF1, and the other surface is referred to as the second surface SF2. According to FIG. 1, the first surface SF1 is the surface facing the punch table 33, and the second surface SF2 is the surface facing the punch needle 31. Therefore, the punching member 30 punches holes in the medium S from the second surface SF2 to the first surface SF1. The downstream end of the medium S is referred to as the front end, and the upstream end of the medium S is referred to as the rear end. In FIG. 1, the rear end SE of the medium S is shown.

[0013] A recovery unit 50 is provided below the punch table 33. The recovery unit 50 is a member such as a basket or a tray. Punch waste generated from the medium S by punching with the punch needles 31 falls downward through the punch needle holes 32 and is recovered by the recovery unit 50.

[0014] Of the conveying path 20, the path provided downstream of the punching member 30 is called the "first conveying path 21". The first conveying path 21 is generally a path ranging from the punching member 30 to the first conveying roller pair 40 provided downstream of the punching member 30. In addition, of the conveying path 20, the path connected downstream of the first conveying path 21 is called the "second conveying path 22". The second conveying path 22 is generally a path downstream from the first conveying roller pair 40. The first conveying roller pair 40 may be interpreted as belonging to either the first conveying path 21 or the second conveying path 22. The second conveying path 22 is provided with the second conveying roller pair 41 in the middle. Here, the first conveying path 21 and the second conveying path 22 are described based on the first conveying roller pair 40, but the first conveying path 21 and the second conveying path 22 do not have to be determined based on the first conveying roller pair 40.

[0015] The first transport roller pair 40 is a pair of rollers 40a and 40b that face each other across the transport path 20. One of the rollers 40a and 40b is a drive roller that rotates by receiving power from a motor (not shown), and the other is a driven roller. The first transport roller pair 40 transports the medium S along the transport path 20 by rotating with the medium S sandwiched between the rollers 40a and 40b. Similarly, the second transport roller pair 41 is a pair of rollers 41a and 41b that face each other across the transport path 20. One of the rollers 41a and 41b is a drive roller that rotates by receiving power from a motor (not shown), and the other is a driven roller. The second transport roller pair 41 transports the medium S along the transport path 20 by rotating with the medium S sandwiched between the rollers 41a and 41b.

[0016] The first transport roller pair 40 and the second transport roller pair 41 are collectively referred to as a transport section that transports the medium S. The transport section may further include transport means such as rollers for transporting the medium S at a position upstream of the first transport roller pair 40 and at a position downstream of the second transport roller pair 41.

[0017] Among the members forming the transport path 20, a member forming a path facing the first surface SF1 of the medium S is referred to as a “first path forming member 23,” and a member forming a path facing the second surface SF2 of the medium S is referred to as a “second path forming member 24.” Thus, the first transport path 21 is formed by the first path forming member 23 and the second path forming member 24, and similarly, the second transport path 22 is also formed by the first path forming member 23 and the second path forming member 24.

[0018] The second transport path 22 has a curved shape. According to Fig. 1, the transport path 20 is horizontal or nearly horizontal upstream of the first transport roller pair 40, and the second transport path 22 is curved upward in a range from the first transport roller pair 40 to the second transport roller pair 41. As is clear from Fig. 1, the first path forming member 23 constituting the second transport path 22 forms the outside of the curved shape, and the second path forming member 24 constituting the second transport path 22 forms the inside of the curved shape.

[0019] For ease of explanation, the first path forming member 23 constituting the second transport path 22 will be referred to as the "curved outer member 23a" below. As can be seen from state SA, the curved outer member 23a is disposed at a position farther away from the first surface SF1 of the medium S than the first path forming member 23 constituting the first transport path 21. In other words, the curved outer member 23a opens the transport path 20 downward at a position where the transport path 20 curves. The second transport path 22 having such a curved shape can hold the medium S in a curved position. In other words, the portion of the medium S passing between the first transport roller pair 40 and the second transport roller pair 41 is curved.

[0020] The forward and backward movement of the punch needles 31 and the drive of the transport unit are controlled by a control unit 11 having a processor and memory. As shown in Fig. 1, a recording unit 60 that performs recording on the medium S is provided upstream of the punching member 30. The recording unit 60 performs recording on the medium S by a liquid ejection head 61 that ejects liquid such as ink. Therefore, the transport path 20 can be said to be a path for transporting the medium S that has been recorded on by the recording unit 60 toward the punching member 30 or further downstream of the punching member 30.

[0021] 1, the recording unit 60 and the post-processing device 10 downstream of the recording unit 60 are connected by a transport path 20. Therefore, the post-processing device 10 can be considered as a part of an apparatus such as a printer or a multifunction device that has the recording unit 60. However, the post-processing device 10 does not have to be physically connected to the recording unit 60. In other words, the user can carry the medium S on which recording by the recording unit 60 has been completed to the post-processing device 10 and set it at an upstream position of the transport path 20 of the post-processing device 10, thereby punching holes in the medium S using the post-processing device 10 independent of the recording unit 60. In a configuration in which the post-processing device 10 is a part of an apparatus having a recording unit 60, the control unit 11 may also function as a control unit that controls recording on the medium S by the recording unit 60.

[0022] FIG. 2 is a flow chart showing the punching process that the control unit 11 executes according to a program stored in the memory. In step S100, the control unit 11 controls the conveying unit to convey the medium S to the punching time medium position. The punching time medium position is the position where the medium S should be stopped when the punching member 30 punches holes. The post-processing device 10 has a sensor (not shown) that can detect the leading end and trailing end SE of the medium S on the conveying path 20. The sensor can be an optical sensor, a mechanical sensor, or various other sensors. The position of the sensor on the conveying path 20 is known information to the control unit 11. For example, the sensor is located at a predetermined position upstream of the punching member 30. The punching time medium position is also determined in advance. For example, the medium S shown in the state SA is located at the punching time medium position. Therefore, after starting the conveying of the medium S by the conveying unit, for example, when the trailing end SE of the medium S is detected by the sensor, the control unit 11 further conveys the medium S by a conveying amount equivalent to the distance from the sensor to the position of the trailing end SE when the medium S is located at the punching time medium position. As a result, the conveying of the medium S to the punching time medium position is completed.

[0023] After the medium S is conveyed in step S100 and stopped, the control unit 11 punches holes in the medium S in step S110. That is, punch needle 31 is moved downward toward the medium S to form punch holes in the medium S. After forming punch holes in the medium S, the control unit 11 moves punch needle 31 upward to separate it from the medium S. In state SA, the rear end SE of the medium S is located slightly upstream of punch needle 31. Therefore, by punching holes in the medium S in state SA with punch needle 31, punch holes are formed in the end of the medium S including the rear end SE.

[0024] The end portion including the trailing end SE refers to the area near the trailing end SE of the medium S. The area near the trailing end SE can be defined in various ways, but for example, when the medium S is divided into multiple areas in the transport direction D1, the area near the trailing end SE is the most upstream area.

[0025] After step S110, in step S120, the control unit 11 again controls the transport unit to transport the punched medium S to be discharged downstream. This completes the punching process for one sheet of medium S. During the transport process in step S120, the medium S is in a curved position sandwiched between the first transport roller pair 40 and the second transport roller pair 41, and the trailing end SE eventually passes through the first transport roller pair 40, and the trailing end SE moves from the first transport path 21 to the second transport path 22. When the trailing end SE leaves the first transport roller pair 40, the trailing end SE moves toward the curved outer member 23a as shown in state SB due to the strength of tension of the curved medium S itself. Then, the trailing end SE and the first surface SF1 in the vicinity thereof collide with the curved outer member 23a.

[0026] Such momentum of the rear end SE, which has left the first transport roller pair 40, moving toward the curved outer member 23a and colliding with the curved outer member 23a causes the punch waste remaining on the medium S to separate from the medium S and fall downward. The recovery section 50 is formed to a size capable of recovering punch waste not only below the punching member 30 but also below the second transport path 22. Therefore, punch waste that has fallen from a position on the second transport path 22 that is open downward by the curved outer member 23a is recovered by the recovery section 50. Note that punch holes are naturally formed in the medium S in state SB, but the punch holes are not shown in the drawing.

[0027] Thus, according to the first embodiment, the post-processing device 10 includes a first path forming member 23 that forms a path facing the first surface SF1 of the medium S, and a second path forming member 24 that forms a path facing the second surface SF2 of the medium S, and includes a transport path 20 along which the medium S recorded by the recording unit 60 is transported, and a punching member 30 that is provided on the transport path 20 and punches holes in the medium S. The transport path 20 includes a first transport path 21 that is provided downstream of the punching member 30 in the transport direction, and a second transport path 22 that is connected downstream of the first transport path 21 in the transport direction, and the second transport path 22 is formed to be able to hold the medium S in a curved position by having a curved shape, and the first path forming member 23 that constitutes the second transport path 22 forms the outside of the curved shape and is located at a position farther away from the first surface SF1 than the first path forming member 23 that constitutes the first transport path 21, and when the medium S is in the curved position, an end portion upstream in the transport direction moves from the first transport path 21 to the second transport path 22. According to the above configuration, without relying on brushes as in the past, punch waste on the medium S can be actively removed from the medium S by the action of the curved outer member 23a and the movement of the medium S when the rear end SE moves from the first transport path 21 to the second transport path 22. This reduces the burden on the user of replacing worn brushes, etc.

[0028] Furthermore, according to the first embodiment, the punching member 30 punches holes in the upstream end of the medium S in the transport direction. According to the above configuration, perforation debris is likely to accumulate near the rear end SE of the medium S, but as the rear end SE moves from the first transport path 21 to the second transport path 22, the movement of the medium S causes the area near the rear end SE to collide with the curved outer member 23a, so that the perforation debris on the medium S can be accurately removed.

[0029] Furthermore, according to the first embodiment, the punching member 30 punches holes in the medium S in the direction from the second surface SF2 to the first surface SF1. According to the above configuration, perforation debris is likely to adhere to the first surface SF1 of the medium S, but since the movement of the medium S when the rear end SE moves from the first transport path 21 to the second transport path 22 causes the first surface SF1 to collide with the curved outer member 23a, the perforation debris adhered to the medium S can be accurately removed.

[0030] Furthermore, according to the first embodiment, the post-processing device 10 includes a recovery section 50 capable of recovering punch waste generated from the medium S by punching. The recovery section 50 recovers the punch waste below the punching member 30, and also recovers the punch waste below the second transport path 22. According to the above-described configuration, punch waste generated in the punching member 30 and punch waste removed from the medium S in the second transport path 22 downstream of the punching member 30 can be collected in the same collection section 50.

[0031] Furthermore, according to the first embodiment, the second transport path 22 is curved upward with respect to the horizontal plane. According to the above-described configuration, by utilizing the shape of the second transport path 22 that curves upward, punch waste can be accurately removed from the medium S.

[0032] 2. Second embodiment: Next, a second embodiment will be described. In the following description including the second embodiment, the description common to the first embodiment will be omitted.

[0033] FIG. 3 shows the configuration of the post-processing device 10 according to the second embodiment in a simplified manner from the same perspective as FIG. 1. In the second embodiment, the control unit 11 can control the movement of the curved outer member 23a by using a predetermined power such as a motor (not shown). The control unit 11 can move the curved outer member 23a to a first position P1 and a second position P2 that is farther away from the first surface SF1 of the medium S than the first position P1. The second position P2 may be understood to be the same as the position of the curved outer member 23a in the first embodiment. In the first embodiment, it can be said that the curved outer member 23a is fixed to the second position P2.

[0034] When the curved outer member 23a is at the first position P1, the second transport path 22 is almost closed to the outside of the path. By closing the second transport path 22 to the outside of the path in this way, the effect of removing the perforation debris from the medium S in the second transport path 22 is reduced, but the sound of the collision between the medium S and the curved outer member 23a is prevented from leaking, and quietness can be improved. Therefore, in the second embodiment, the control unit 11 moves the curved outer member 23a to the first position P1 or the second position P2 based on the recording information on the medium S by the recording unit 60 or the environmental information of the environment in which the post-processing device 10 is placed. Based on the recording information or the environmental information means based on at least one of the recording information or the environmental information. Conceptually, the control unit 11 moves the curved outer member 23a to the second position P2 in a situation in which the medium S is likely to be attached with perforation debris, and moves the curved outer member 23a to the first position P1 in a situation in which the medium S is unlikely to be attached with perforation debris.

[0035] Fig. 4 is a flowchart showing the movement control process of the curved outer member 23a executed by the control unit 11 according to a program stored in memory. The control unit 11 executes the movement control process of Fig. 4 when executing the punching process of Fig. 2 for one medium S. The control unit 11 needs to complete the movement control process of Fig. 4 for the medium S at the latest by the time it completes step S110 in the flowchart of Fig. 2 for the medium S.

[0036] In step S200, the control unit 11 acquires environmental information. The environmental information is the humidity and temperature of the environment in which the post-processing device 10 is placed. As shown in FIG. 3, the control unit 11 is connected to the thermometer 12 and the hygrometer 13. Therefore, the control unit 11 only needs to acquire the temperature from the thermometer 12 and the humidity from the hygrometer 13. Furthermore, even if the control unit 11 does not have the thermometer 12 or the hygrometer 13, it can acquire the humidity and temperature through an input operation by the user to the post-processing device 10.

[0037] In step S210, the control unit 11 acquires recording information about the target medium S. The recording information is information indicating the contents of the recording that the recording unit 60 will perform or has performed on the target medium S, and is recording data on a page basis. When the recording unit 60 performs recording using the liquid ejection head 61, the recording information is data that specifies whether or not to eject a dot of liquid for each pixel in a page. From such recording information, the recording density on the medium S can be determined. When the control unit 11 also functions as the control unit of the recording unit 60, it can be said that the control unit 11 has already acquired the recording information about the target medium S. When the control unit 11 does not also function as the control unit of the recording unit 60, the control unit 11 acquires the recording information about the target medium S by communicating with the recording unit 60 or by an input operation from the user. The order of execution of steps S200 and S210 may be reversed from that shown in FIG. 4, or steps S200 and S210 may be executed simultaneously.

[0038] In step S220, the control unit 11 refers to the environmental concentration table based on the environmental information and recorded information acquired in steps S200 and S210. 5 shows an example of an environment table 80 for determining an environment concentration table to be referred to depending on temperature and humidity. The environment concentration table and the environment table 80 are stored in advance in a memory that the control unit 11 can access.

[0039] The environment table 80 has a horizontal axis representing temperature and a vertical axis representing humidity, and the control unit 11 determines from the environment table 80 which of the environments A to I the environment in which the post-processing device 10 is placed is, according to the combination of temperature and humidity acquired in step S200. The environment table 80 divides the temperature range into a plurality of temperature thresholds t1, t2, t3, and t4. The environment table 80 also divides the humidity range into a plurality of humidity thresholds r1, r2, r3, and r4. For example, if the temperature is equal to or greater than the temperature threshold t1 and less than t2, and the humidity is equal to or greater than the humidity threshold r1 and less than r2, the control unit 11 determines that the environment is environment G. For example, if the temperature is equal to or greater than the temperature threshold t2 and less than t3, and the humidity is equal to or greater than the humidity threshold r2 and less than r3, the control unit 11 determines that the environment is environment E.

[0040] 6 shows an example of an environmental concentration table for each environment. Each of the environmental concentration tables TA, TB, TC, TD, TE, TF, TG, TH, and TI specifies the correspondence between the print concentration and ON / OFF of the curved path opening. "Opening ON" of the curved path means opening the curved outer member 23a, i.e., selecting the second position P2, and "opening OFF" of the curved path means closing the curved outer member 23a, i.e., selecting the first position P1.

[0041] The symbols A to I following the symbol T in the environment concentration table correspond to the environments A to I determined from the environment table 80. When the control unit 11 determines, for example, that the environment is environment A from the environment table 80 in accordance with the temperature and humidity, it refers to the environment concentration table TA. Also, when the control unit 11 determines, for example, that the environment is environment E from the environment table 80 in accordance with the temperature and humidity, it refers to the environment concentration table TE.

[0042] The control unit 11 calculates the recording density on the medium S from the recording information acquired in step S210. For example, the control unit 11 determines the recording density as the ratio of the number of pixels for which dot ejection is specified among the total number of pixels in the page indicated by the recording information. In other words, the recording density is the ratio of the number of dots of ink ejected onto the medium S among the number of dots of ink that can be shot into the page. However, the control unit 11 may calculate the recording density corresponding to the planned perforation position of the medium S by the perforation member 30, rather than the recording density for the entire range of the medium S. As described above, the perforation member 30 perforates the area near the rear end SE of the medium S. Therefore, the area near the rear end SE is the planned perforation position. In addition, the position and size of such an area near the rear end SE in the medium S can be defined in advance. Therefore, the control unit 11 only pays attention to each pixel corresponding to the area near the rear end SE among all pixels in the page indicated by the recording information, and calculates the ratio of the number of pixels for which dot ejection is specified among those pixels as the recording density corresponding to the planned perforation position.

[0043] The control unit 11 selects either "aperture ON" or "aperture OFF" based on the recording density calculated in this manner and the environmental density table to which it refers. In step S230, the control unit 11 refers to the environmental concentration table based on the environmental information and the recording information as described above, and if "Aperture ON" is selected, the process proceeds to step S240 from the determination of "Yes". On the other hand, if "Aperture OFF" is selected, the process proceeds to step S250 from the determination of "No" in step S230. For example, the control unit 11 refers to the environmental concentration table TA according to the environmental information, and if the recording concentration calculated from the recording information is 65%, selects "Aperture ON" according to the environmental concentration table TA.

[0044] The environmental concentration tables TA, TB, TC, TD, TE, TF, TG, TH, and TI will be described. A medium S with a high print density, that is, a medium S with a lot of liquid attached thereto, is likely to swell and leave punch waste due to poor perforation. Therefore, the environmental concentration table basically associates "aperture ON" with a high print density and "aperture OFF" with a low print density. In addition, in the environmental concentration table, the print density at which "aperture OFF" switches to "aperture ON" can be said to be a value that separates "No" and "Yes" in step S230, that is, a density threshold value related to the print density. For example, in the environmental concentration table TA, the print density is 60%. In the environmental concentration table TB, the print density is 40%. In the environmental concentration table TD, the print density is 80%.

[0045] In this way, the concentration threshold value varies for each environmental concentration table, that is, depending on the humidity or temperature. When the humidity is high, perforation debris is also more likely to remain on the medium S. Therefore, when comparing environmental concentration tables with the same temperature condition, for example, environmental concentration tables TA, TD, and TG, the higher the humidity of the environmental concentration table, the lower the concentration threshold value is set and the more likely "opening ON" is selected. Also, when the temperature is high, perforation debris is also more likely to remain on the medium S. Therefore, when comparing environmental concentration tables with the same humidity condition, for example, environmental concentration tables TA, TB, and TC, the higher the temperature of the environmental concentration table, the lower the concentration threshold value is set and the more likely "opening ON" is selected.

[0046] Furthermore, under conditions of low print density and low humidity, a phenomenon is observed in which perforation waste is likely to adhere to the medium S due to the influence of static electricity. For this reason, for example, in environmental density tables corresponding to low humidity, such as the environmental density tables TG, TH, and TI, "aperture ON" is associated with print densities below a predetermined print density that is lower than the above-mentioned density threshold value.

[0047] In step S240, the controller 11 moves the curved outer member 23a to the second position P2, and ends the flowchart in Fig. 4. If the curved outer member 23a is already in the second position P2 when the determination in step S230 is "Yes", step S240 is essentially completed, and the controller 11 ends the flowchart in Fig. 4 without changing the position of the curved outer member 23a.

[0048] On the other hand, in step S250, the controller 11 moves the curved outer member 23a to the first position P1, and ends the flowchart in Fig. 4. If the curved outer member 23a is already at the first position P1 when the determination in step S230 is "No", step S250 is essentially completed, and the controller 11 ends the flowchart in Fig. 4 without changing the position of the curved outer member 23a.

[0049] The control unit 11 may control the movement of the curved outer member 23a in the following ways. For example, the control unit 11 compares the recording density corresponding to the planned perforation position of the medium S with a predetermined density threshold value related to the recording density. This predetermined density threshold value may be a fixed value regardless of temperature or humidity. Then, the control unit 11 moves the curved outer member 23a to the second position P2 when the recording density is equal to or greater than the density threshold value, and moves the curved outer member 23a to the first position P1 when the recording density is less than the density threshold value.

[0050] For example, the control unit 11 compares the humidity, which is the environmental information, with a first predetermined humidity threshold value related to humidity. The first humidity threshold value may be a fixed value regardless of the temperature or recording density. Then, when the humidity is equal to or greater than the first humidity threshold value, the control unit 11 moves the curved outer member 23a to the second position P2, and when the humidity is less than the first humidity threshold value, the control unit 11 moves the curved outer member 23a to the first position P1.

[0051] For example, the control unit 11 compares the humidity, which is environmental information, with a predetermined second humidity threshold value related to humidity, and also compares the temperature, which is environmental information, with a predetermined temperature threshold value related to temperature. Here, the first humidity threshold value is greater than the second humidity threshold value. The combination of the second humidity threshold value and the predetermined temperature threshold value may be a fixed value regardless of the recording density. Then, when the humidity is less than the second humidity threshold value and the temperature is less than the temperature threshold value, the control unit 11 moves the curved outer member 23a to the second position P2. On the other hand, when such a condition of low humidity and low temperature is not satisfied, the control unit 11 moves the curved outer member 23a to the first position P1. When it is determined by any one of these methods that the curved outer member 23a should be moved to the second position P2, the control section 11 may move the curved outer member 23a to the second position P2.

[0052] Thus, according to the second embodiment, the post-processing device 10 includes a control unit 11 that controls the movement of the first path forming member 23 that constitutes the second transport path 22. The control unit 11 is capable of moving the first path forming member 23 that constitutes the second transport path 22 to a first position P1 and a second position P2 that is farther away from the first surface SF1 than the first position P1, and moves the first path forming member 23 that constitutes the second transport path 22 to the first position P1 or the second position P2 based on the recording information on the medium S by the recording unit 60 or environmental information on the environment in which the post-processing device 10 is placed. According to the above configuration, it is possible to determine whether or not the medium S is in a state in which punching waste is likely to adhere, based on the recording information and environmental information, and to move the curved outer member 23a to the second position P2 or to the first position P1. Also, by moving the curved outer member 23a to the first position P1, quietness can be improved.

[0053] Furthermore, according to the second embodiment, the recording unit 60 is a mechanism that performs recording by ejecting liquid, and when controlling the movement of the first path forming member 23 that constitutes the second transport path 22 based on the recording information, the control unit 11 compares the recording density corresponding to the planned perforation position of the medium S by the perforation member 30, which is the recording information, with a density threshold value for the recording density, and if the recording density corresponding to the planned perforation position is equal to or greater than the density threshold value, moves the first path forming member 23 that constitutes the second transport path 22 to the second position P2. According to the above configuration, if the medium S is prone to have punch debris due to high recording density at the intended punching position, the curved outer member 23a can be moved to the second position P2 to actively remove the punch debris from the medium S.

[0054] Furthermore, according to the second embodiment, the control unit 11 changes the concentration threshold value in accordance with the humidity or temperature, which is environmental information. According to the above configuration, by changing the density threshold value to be compared with the recording density depending on the temperature and humidity, it is possible to more accurately determine whether or not the medium S is in a state in which punch waste is likely to adhere, and to select the position of the curved outer member 23a.

[0055] Furthermore, according to the second embodiment, when controlling the movement of the first path forming member 23 constituting the second transport path 22 based on environmental information, the control unit 11 compares the humidity, which is the environmental information, with a first humidity threshold value for humidity, and when the humidity of the environmental information is equal to or greater than the first humidity threshold value, moves the first path forming member 23 constituting the second transport path 22 to the second position P2. According to the above configuration, in a situation where the medium S is prone to have dust due to high humidity, the curved outer member 23a can be moved to the second position P2, thereby making it possible to actively remove dust from the medium S.

[0056] Furthermore, according to the second embodiment, when controlling the movement of the first path forming member 23 constituting the second transport path 22 based on environmental information, the control unit 11 may compare the humidity and temperature of the environmental information with a second humidity threshold value for humidity and a temperature threshold value for temperature, and move the first path forming member 23 constituting the second transport path 22 to the second position P2 when the humidity of the environmental information is less than the second humidity threshold value and the temperature of the environmental information is less than the temperature threshold value. According to the above configuration, in a situation where the medium S is prone to have dust due to low humidity and low temperature, the curved outer member 23a can be moved to the second position P2 to actively remove the dust from the medium S.

[0057] In the second embodiment described so far, when performing a punching process on the medium S, the position of the curved outer member 23a is automatically selected and changed based on the recorded information and environmental information for each time. Such a second embodiment is called an "automatic selection mode" of the curved outer member position. On the other hand, there may be an "opening OFF mode" in which the position of the curved outer member 23a is fixed to the first position P1 regardless of the recorded information and environmental information, and an "opening ON mode" in which the position of the curved outer member 23a is fixed to the second position P2 regardless of the recorded information and environmental information.

[0058] The user may be allowed to arbitrarily select from among the "automatic selection mode," "opening OFF mode," and "opening ON mode." Specifically, when the type of medium S is a predetermined first type that is less likely to attract punching debris, the user instructs the control unit 11 to select the opening OFF mode. When the type of medium S is a predetermined second type that is more likely to attract punching debris, the user instructs the control unit 11 to select the automatic selection mode. When the type of medium S is a predetermined third type that is even more likely to attract punching debris than the second type, the user instructs the control unit 11 to select the opening ON mode. The control unit 11 selects a mode according to the user's instruction, and operates the post-processing device 10 in the selected mode.

[0059] In addition, the control unit 11 may acquire the type of medium S set on the transport path 20 for punching processing from a specified sensor or input from the user, and select either the "opening OFF mode," "automatic selection mode," or "opening ON mode" depending on whether the acquired type of medium S corresponds to the first, second, or third type.

[0060] 3. Third embodiment: Fig. 7 shows a simplified configuration of the post-processing device 10 according to the third embodiment from the same perspective as Figs. 1 and 3. Fig. 7 differs from Fig. 1 in that it has a first collection section 51 and a second collection section 52 instead of the collection section 50. That is, according to the third embodiment, the post-processing device 10 has a collection section capable of collecting punch waste generated from the medium S by punching, and the collection section is divided into the first collection section 51 provided below the punching member 30 and the second collection section 52 provided below the second transport path 22. The capacity of the second collection section 52 is smaller than the capacity of the first collection section 51.

[0061] By dividing the recovery section into a first recovery section 51 below the punching member 30 and a second recovery section 52 below the second transport path 22, each recovery section can be made to have the required capacity at each position, and the space occupied by the recovery section within the device can be saved. Also, since the amount of punch scraps that falls below the second transport path 22 is smaller than that below the punching member 30, the second recovery section 52 can be made smaller than the first recovery section 51. This configuration using the first recovery section 51 and the second recovery section 52 instead of the recovery section 50 can naturally be applied to the second embodiment and each embodiment described later.

[0062] 4. Fourth embodiment: FIG. 8 shows the configuration of the post-processing device 10 according to the fourth embodiment in a simplified manner from the same viewpoint as in FIGS. 1, 3, and 7. FIG. 8 differs from FIG. 3 in that it has a brush 70 that can contact the first surface SF1 of the medium S transported through the second transport path 22. According to FIG. 8, the brush 70 is disposed at a position where the bristles of the brush 70 enter the second transport path 22 from outside the curved outer member 23a when the curved outer member 23a is at the second position P2. The curved outer member 23a has a window or slit in a range indicated by the reference symbol 25 through which the bristles of the brush 70 can pass. Also, according to FIG. 8, when the curved outer member 23a is at the first position P1, the brush 70 does not reach the second transport path 22.

[0063] Therefore, according to the fourth embodiment, when the curved outer member 23a is in the first position P1, the brush 70 does not come into contact with the medium S transported through the second transport path 22. In other words, when the curved outer member 23a is in the first position P1, the brush 70 is not used, and therefore wear on the brush 70 can be suppressed. On the other hand, when the curved outer member 23a is at the second position P2, the brush 70 comes into contact with the medium S being transported along the second transport path 22. In other words, when the trailing end SE of the medium S moves from the first transport path 21 to the second transport path 22, the trailing end SE moves toward the curved outer member 23a, and the first surface SF1 of the medium S comes into contact with the brush 70. Therefore, the effect of removing punch debris by the brush 70 is added to the effect of removing punch debris on the second transport path 22 when the curved outer member 23a is at the second position P2, as described above.

[0064] 5. Other embodiments: When the first path forming member 23 (curved outer member 23a) constituting the second transport path 22 is positioned at the second position P2, the transport speed of the medium S may be made faster than when the curved outer member 23a is positioned at the first position P1.

[0065] Specifically, in the punching process of Fig. 2, when completing step S110 and performing transport in step S120, the control unit 11 changes the transport speed depending on whether the curved outer member 23a is at the first position P1 or the second position P2. When the curved outer member 23a is at the first position P1, the control unit 11 causes the transport unit to transport the medium S at a predetermined first speed in step S120, and when the curved outer member 23a is at the second position P2, the control unit 11 causes the transport unit to transport the medium S at a predetermined second speed faster than the first speed in step S120. In this way, by increasing the transport speed when the curved outer member 23a is at the second position P2, the effect of removing punching waste caused by the medium S having its rear end SE moved to the second transport path 22 colliding with the curved outer member 23a can be further improved.

[0066] When the first path forming member 23 (curved outer member 23a) constituting the second transport path 22 is positioned at the second position P2, the transport speed of the medium S after the medium S has been perforated by the punching member 30 may be made faster than the transport speed of the medium S before the medium S is perforated by the punching member 30.

[0067] According to FIG. 2, the transport speed of the medium S before the medium S is perforated is the transport speed in step S100, and the transport speed of the medium S after the medium S is perforated is the transport speed in step S120. In step S100, the control unit 11 causes the transport section to transport the medium S at a predetermined third speed. Then, when the curved outer member 23a is at the first position P1, the control unit 11, after completing step S110, causes the transport section to transport the medium S at the same third speed as in step S100 in step S120. On the other hand, when the curved outer member 23a is at the second position P2, the control unit 11, in step S120, causes the transport section to transport the medium S at a predetermined fourth speed that is faster than the third speed. It may be understood that the first speed=the third speed and the second speed=the fourth speed. In this way, when the curved outer member 23a is at the second position P2, the transport speed of the medium S after the medium S has been perforated can be increased, thereby further enhancing the effect of removing perforation debris caused by the medium S, whose rear end SE has moved to the second transport path 22, colliding with the curved outer member 23a.

[0068] The recording method employed by the recording unit 60 is not limited to the inkjet method using the liquid ejection head 61, but may be other methods such as an electrophotographic method or a thermal method. [Explanation of symbols]

[0069] 10... post-processing device, 11... control unit, 12... thermometer, 13... hygrometer, 20... transport path, 21... first transport path, 22... second transport path, 23... first path forming member, 23a... curved outer member, 24... second path forming member, 30... perforation member, 31... punch needle, 32... punch pin hole, 33... punch table, 40... first transport roller pair, 41... second transport roller pair, 50... collection unit, 51... first collection unit, 52... second collection unit, 60... recording unit, 61... liquid ejection head, 70... brush, 80... environmental table, D1... transport direction, P1... first position, P2... second position, S... medium, SE... rear end, SF1... first surface, SF2... second surface, TA, TB, TC, TD, TE, TF, TG, TH, TI... environmental concentration table

Claims

1. a transport path including a first path forming member that forms a path facing a first surface of a medium and a second path forming member that forms a path facing a second surface of the medium, the transport path along which the medium recorded by the recording unit is transported; a punching member provided in the transport path for punching holes in the medium, The transport path is a first conveying path provided downstream in a conveying direction of the punching member; a second transport path connected to the downstream side of the first transport path in a transport direction, the second transport path is formed to have a curved shape so as to be able to hold the medium in a curved position; the first path forming member constituting the second transport path forms an outer side of the curved shape, is disposed at a position farther away from the first surface than the first path forming member constituting the first transport path, and opens the transport path downward so that punch waste generated from the medium by the punching falls; The post-processing device according to claim 1, wherein, when the medium is in the curved position, an upstream end in a transport direction of the medium moves from the first transport path to the second transport path.

2. A post-processing device, comprising: a transport path including a first path forming member that forms a path facing a first surface of a medium and a second path forming member that forms a path facing a second surface of the medium, the transport path along which the medium recorded by the recording unit is transported; a punching member provided in the transport path for punching holes in the medium, The transport path is a first conveying path provided downstream in a conveying direction of the punching member; a second transport path connected to the downstream side of the first transport path in a transport direction, the second transport path is formed to have a curved shape so as to be able to hold the medium in a curved position; the first path forming member constituting the second transport path forms an outer side of the curved shape and is disposed at a position farther away from the first surface than the first path forming member constituting the first transport path, When the medium is in the curved position, an upstream end in a transport direction moves from the first transport path to the second transport path, The post-processing device further includes a control unit that controls movement of the first path forming member that constitutes the second transport path, The control unit is the first path forming member constituting the second transport path is movable between a first position and a second position that is farther away from the first surface than the first position, A post-processing device characterized in that the first path forming member that constitutes the second transport path is moved to the first position or the second position based on recording information for the medium by the recording unit or environmental information of the environment in which the post-processing device is placed.

3. a recording unit that performs recording by discharging liquid, and a movement of the first path forming member that constitutes the second transport path is controlled based on the recording information; The post-processing device according to claim 2, characterized in that the control unit compares the recording density corresponding to the planned perforation position of the medium by the perforation member, which is the recording information, with a density threshold value for the recording density, and if the recording density corresponding to the planned perforation position is equal to or greater than the density threshold value, moves the first path forming member that constitutes the second transport path to the second position.

4. The post-processing device according to claim 3 , wherein the control unit changes the density threshold value in accordance with the environmental information, which is one of humidity and temperature.

5. When the movement of the first path forming member that constitutes the second transport path is controlled based on the environmental information, 3. The post-processing device according to claim 2, wherein the control unit compares the humidity of the environmental information with a first humidity threshold value related to humidity, and when the humidity of the environmental information is equal to or greater than the first humidity threshold value, moves the first path forming member that constitutes the second transport path to the second position.

6. When the movement of the first path forming member that constitutes the second transport path is controlled based on the environmental information, 3. The post-processing device according to claim 2, wherein the control unit compares the humidity and temperature of the environmental information with a second humidity threshold value for humidity and a temperature threshold value for temperature, and when the humidity of the environmental information is less than the second humidity threshold value and the temperature of the environmental information is less than the temperature threshold value, moves the first path forming member that constitutes the second transport path to the second position.

7. A post-processing device as described in any one of claims 2 to 6, characterized in that when the first path forming member constituting the second transport path is positioned at the second position, the post-processing device has a brush that can contact the first surface of the medium transported along the second transport path.

8. A post-processing device as described in any one of claims 2 to 7, characterized in that when the first path forming member constituting the second transport path is arranged at the second position, the transport speed of the medium is made faster than when the first path forming member constituting the second transport path is arranged at the first position.

9. When the first path forming member constituting the second transport path is disposed at the second position, A post-processing device as described in any one of claims 2 to 8, characterized in that the transport speed of the medium after the medium has been punched by the punching member is made faster than the transport speed of the medium before the medium is punched by the punching member.

10. 10. The post-processing device according to claim 1, wherein the punching member punches a hole in an upstream end of the medium in a transport direction.

11. 11. The post-processing device according to claim 1, wherein the punching member punches holes in a direction from the second surface to the first surface of the medium.

12. A recovery unit capable of recovering the perforation debris is provided, The post-processing device according to claim 1 , wherein the recovery section recovers the punch waste below the second transport path.

13. A recovery unit capable of recovering the perforation debris is provided, the collecting section is divided into a first collecting section provided below the punching member and a second collecting section provided below the second transport path, The post-processing device according to claim 1 , wherein a capacity of the second recovery section is smaller than a capacity of the first recovery section.

14. 14. The post-processing device according to claim 1, wherein the second transport path is curved upward with respect to a horizontal plane.

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