Rotary unit, post-processing device

Abstract

To improve versatility and easily replace a conveying force imparting part in a configuration provided with a conveying force imparting part imparting a conveying force to a medium, a holding part holding the conveying force imparting part, and a rotary shaft.SOLUTION: The holding part of a rotary unit has a shaft hole through which the rotary shaft passes and is fixed to the rotary shaft while being slid in the axial direction of the rotary shaft. The conveying force imparting part includes a fitting hole fitted to the outer periphery of the holding part, a base having an opening connected to the fitting hole, and a contact part provided at the base. The base part is deformable, and the conveying force imparting part is attachable and detachable to and from the holding portion in a direction intersecting the axial direction of the rotation axis through the opening.SELECTED DRAWING: Figure 4

Description

[[Technical Field]]

[0001] The present invention relates to a rotating unit that applies a conveying force to a medium by rotating, and a post-processing apparatus provided with the same. The present invention also relates to a conveying force applying member that applies a conveying force to a medium. [[Background Art]]

[0002] Patent Document 1 discloses an impeller that includes a shaft, a substantially cylindrical impeller boss attached to the shaft, and a tongue piece portion held by the impeller boss, and is configured to strike a banknote with the tongue piece portion. The impeller boss is formed of a resin material such that an opening having a substantially C-shaped cross section is formed. The opening can be widened until it becomes larger than the diameter of the shaft. The tongue piece portion is formed of an elastic material such as rubber, and includes a substantially C-shaped base portion and a plurality of tongue pieces extending radially from the base portion. The tongue piece portion is fixed to the impeller boss by fitting the base portion and the root portion of each tongue piece into the groove of the impeller boss. [[Prior Art Document]] [[Patent Document]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2018-184289 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] In the configuration described in the above Patent Document 1, the impeller boss is an important component. This is because the tongue piece portion is soft and it is difficult to directly attach it to the shaft. In addition, the phase of the tongue piece portion with respect to the shaft is important, and increasing the diameter of the portion where the tongue piece portion is attached by the impeller boss is preferable from the viewpoint of suppressing phase shift of the tongue piece portion. In the configuration described in Patent Document 1, the tongue portion is fitted into the groove of the impeller boss to integrate the two, and then attached to the shaft. Since the impeller boss needs to have a roughly C-shaped opening that expands, it needs to have a certain degree of flexibility. For this reason, there is a risk that the elasticity of the impeller boss may cause a phase misalignment of the impeller boss relative to the shaft, which in turn may cause a phase misalignment of the tongue portion relative to the shaft. [Means for solving the problem]

[0005] To solve the above problems, the present invention provides a rotating unit that applies a conveying force to a medium by rotating, comprising: a conveying force applying unit that applies a conveying force to the medium by the contact portion, having at least one contact portion in the direction of rotation that contacts the medium, a rotating shaft of the conveying force applying unit, a holding portion interposed between the rotating shaft and the conveying force applying unit to hold the conveying force applying unit, and fixing means for fixing the conveying force applying unit to the rotating shaft, wherein the holding portion has an axial hole through which the rotating shaft passes and is fixed in a state where it slides relative to the rotating shaft in the axial direction of the rotating shaft, the conveying force applying unit comprises a base portion having a fitting hole that fits onto the outer circumference of the holding portion and an opening connected to the fitting hole, and the contact portion provided on the base portion, wherein the base portion is deformable, and the conveying force applying unit is detachable from the holding portion via the opening in a direction intersecting the axial direction of the rotating shaft.

[0006] Furthermore, the post-processing device of the present invention is a post-processing device that performs post-processing on a medium recorded by a recording device, and is characterized by comprising: a processing tray for loading the medium to be processed; an alignment unit for aligning one end of the medium loaded on the processing tray; a rotating unit for applying a transport force toward the alignment unit to the medium; and a post-processing unit for performing post-processing on the medium loaded on the processing tray.

[0007] The present invention also relates to a conveying force-applying member in a rotating unit comprising: a conveying force-applying member for applying a conveying force to a medium; a rotating shaft of the conveying force-applying member; a holding part interposed between the rotating shaft and the conveying force-applying member for holding the conveying force-applying member, the holding part having a shaft hole through which the rotating shaft passes, and being fixed in a state where it slides relative to the rotating shaft in the axial direction of the rotating shaft; and fixing means for fixing the conveying force-applying member to the rotating shaft, wherein the conveying force-applying member comprises a base having a fitting hole that fits onto the outer circumference of the holding part and an opening connected to the fitting hole, and a contact part provided on the base, which contacts the medium and applies a conveying force to the medium, wherein the base is deformable and can be attached to and detached from the holding part via the opening in a direction intersecting the axial direction of the rotating shaft. [Brief explanation of the drawing]

[0008] [Figure 1] Front view of the recording system. [Figure 2] A diagram showing the internal configuration of the post-processing device. [Figure 3] Perspective view of the rotating unit. [Figure 4] A perspective view showing a disassembled portion of the rotating unit. [Figure 5] This diagram shows the intermediate stage in which the retaining member is being mounted by sliding it axially relative to the rotating shaft. [Figure 6] A perspective view showing the holding member with the conveying force-applying member attached. [Figure 7] (A) and (B) are perspective views of the retaining member. [Figure 8] A cross-sectional view of the rotating unit cut in the axial direction. [Figure 9] Plan view of a rotating unit according to another embodiment. [Modes for carrying out the invention]

[0009] The present invention will be described in general terms below. A rotating unit according to the first embodiment is a rotating unit that imparts a conveying force to a medium by rotating, comprising: a conveying force imparting unit which has at least one contact portion in the direction of rotation that contacts the medium and imparts a conveying force to the medium by the contact portion; a rotating shaft of the conveying force imparting unit; a holding portion which is interposed between the rotating shaft and the conveying force imparting unit and holds the conveying force imparting unit; and fixing means for fixing the conveying force imparting unit to the rotating shaft, wherein the holding portion has an axial hole through which the rotating shaft passes and is fixed in a state where it slides relative to the rotating shaft in the axial direction of the rotating shaft, and the conveying force imparting unit comprises a base portion which has a fitting hole that fits onto the outer circumference of the holding portion and an opening connected to the fitting hole, and the contact portion provided on the base portion, wherein the base portion is deformable, and the conveying force imparting unit is detachable from the holding portion via the opening in a direction intersecting the axial direction of the rotating shaft.

[0010] According to this embodiment, the holding portion has an axial hole through which the rotating shaft passes, and is fixed in a state where it slides in the axial direction of the rotating shaft relative to the rotating shaft. Therefore, even if the holding portion is made of a material with high hardness, it can be attached to the rotating shaft, and consequently, phase misalignment of the holding portion with respect to the rotating shaft can be suppressed. Furthermore, since the conveying force-applying part held by the holding part is detachable via the opening in a direction intersecting the axial direction of the rotating shaft, the conveying force-applying part can be easily replaced with the holding part. Therefore, the holding part can be common to devices with different specifications, improving versatility. In this specification, hardness refers to the degree of hardness, and a higher hardness means that the material is harder and less prone to deformation. Hardness can also be expressed as elastic modulus, and a higher elastic modulus means that the material is harder and less prone to deformation.

[0011] The second aspect is characterized in that, in the first aspect, the outer circumference of the rotating shaft has a first circular arc portion and a first straight portion along the circumferential direction, and the shaft hole of the holding portion has a shape that fits with the outer circumference of the rotating shaft.

[0012] According to this aspect, the outer circumference of the rotating shaft has a first arc portion and a first linear portion along the circumferential direction, and the shaft hole of the holding portion has a shape that fits with the outer circumference of the rotating shaft, so that the phase shift of the holding portion relative to the rotating shaft can be reliably suppressed with a simple structure.

[0013] A third aspect is characterized in that, in the second aspect, the outer circumference of the holding portion has a second arc portion and a second linear portion along the circumferential direction, and the fitting hole of the base portion has a shape that fits with the outer circumference of the holding portion.

[0014] According to this aspect, the outer circumference of the holding portion has a second arc portion and a second linear portion along the circumferential direction, and the fitting hole of the base portion has a shape that fits with the outer circumference of the holding portion, so that the phase shift of the conveying force applying portion relative to the holding portion can be suppressed, that is, the phase shift of the conveying force applying portion relative to the rotating shaft can be further suppressed. Furthermore, this aspect is not limited to the above-mentioned second aspect, and may be applied to the above-mentioned first aspect.

[0015] A fourth aspect is characterized in that, in the third aspect, the holding portion includes a radially protruding protrusion on the second linear portion, and the base portion of the conveying force applying portion has a portion that abuts against the protrusion in the rotation direction.

[0016] According to this aspect, the holding portion includes a radially protruding protrusion on the second linear portion, and the base portion of the conveying force applying portion has a portion that abuts against the protrusion in the rotation direction, so that the phase shift of the conveying force applying portion relative to the holding portion can be further suppressed, that is, the phase shift of the conveying force applying portion relative to the rotating shaft can be further suppressed.

[0017] A fifth aspect is characterized in that, in the fourth aspect, the base portion of the conveying force applying portion has a shape that sandwiches the protrusion between a first portion and a second portion in the rotation direction. According to this aspect, the base portion of the conveying force applying portion has a shape in which the protruding portion is sandwiched between the first portion and the second portion in the rotational direction, so that the phase shift of the conveying force applying portion relative to the holding portion can be more reliably suppressed, that is, the phase shift of the conveying force applying portion relative to the rotating shaft can be more reliably suppressed.

[0018] A sixth aspect is characterized in that, in the fifth aspect, the protruding portion is provided at a position shifted from the center position of the second linear portion when viewed from the axial direction of the rotating shaft. According to this aspect, the protruding portion is provided at a position shifted from the center position of the second linear portion when viewed from the axial direction of the rotating shaft, so that the mounting direction of the conveying force applying portion with respect to the holding portion is fixed constant, thereby preventing erroneous assembly.

[0019] A seventh aspect is characterized in that, in the sixth aspect, the fixing means includes a fixing member fixed to the rotating shaft, and the fixing member includes a fixed portion which is a portion fixed to the rotating shaft, and a restraining portion that restrains the protruding portion as well as the first portion and the second portion.

[0020] According to this aspect, the fixing means includes a fixing member fixed to the rotating shaft, and the fixing member includes the fixed portion which is a portion fixed to the rotating shaft, and the restraining portion that restrains the protruding portion as well as the first portion and the second portion, so that the protruding portion, the first portion, and the second portion are restrained integrally, thereby more reliably suppressing the phase shift of the conveying force applying portion relative to the rotating shaft. Note that this aspect is not limited to the sixth aspect described above, and may be applied to the fifth aspect described above.

[0021] An eighth aspect is characterized in that, in the seventh aspect, the fixed portion and the restraining portion are at positions shifted in the axial direction of the rotating shaft, and the fixing member is provided with a phase defining portion on the opposite side to the fixed portion across the restraining portion in the axial direction, the phase defining portion being a portion in contact with the second linear portion of the rotating shaft and defining the phase of the fixing member with respect to the rotating shaft.

[0022] According to this embodiment, the fixing member is provided with a phase defining portion on the opposite side of the fixed portion from the restrained portion in the axial direction, which is in contact with the second linear portion of the rotation axis and defines the phase of the fixing member with respect to the rotation axis. As a result, the phase of the fixing member with respect to the rotation axis is defined, and consequently, the phase misalignment of the conveying force applying portion with respect to the rotation axis can be suppressed more reliably.

[0023] The ninth aspect is characterized in that, in the seventh aspect, a pressing portion is provided for pressing the medium from above at a position in a different phase from the contact portion in the rotational direction, and the pressing portion is fixed to the rotational shaft together with the fixed portion of the fixing member.

[0024] According to this embodiment, since a pressing portion is provided at a position in a different phase from the contact portion in the rotational direction, pressing the medium from above, the upward floating of the medium can be suppressed by the pressing portion. Furthermore, since the pressing portion is fixed to the rotational shaft together with the fixed portion of the fixing member, a dedicated means for fixing the pressing portion is not required, thereby reducing the number of parts and lowering costs. Furthermore, this embodiment is not limited to the seventh embodiment described above, but may also be applied to the eighth embodiment described above.

[0025] The tenth embodiment is characterized in that, in the first embodiment, the conveying force application unit has a plurality of contact units in the rotational direction. According to this embodiment, since the conveying force application unit has multiple contact parts in the rotational direction, it can reliably convey the medium compared to a configuration that has only one contact part in the rotational direction. Furthermore, this embodiment is not limited to the first embodiment described above, but may also be applied to any of the second to ninth embodiments described above.

[0026] The eleventh embodiment is characterized in that, in the first embodiment, the conveying force applying unit, the holding unit, and the fixing means are formed as a set of rotating bodies, and a plurality of such rotating bodies are provided in the axial direction of the rotation shaft.

[0027] According to this embodiment, the conveying force application unit, the holding unit, and the fixing means are formed as a set of rotating bodies, and since multiple rotating bodies are provided in the axial direction of the rotation shaft, the medium can be conveyed more reliably compared to a configuration in which only one rotating body is provided in the axial direction. Furthermore, if multiple rotating bodies are provided in the axial direction, the conveying force application unit would be detachable in the axial direction, which would cause interference with the other rotating bodies. However, since the conveying force application unit is detachable in a direction intersecting the axial direction, the other rotating bodies do not get in the way, and the conveying force application unit can be easily attached and detached. Furthermore, this embodiment is not limited to the first embodiment described above, but may also be applied to any of the second to tenth embodiments described above.

[0028] The twelfth aspect is characterized in that, in the eleventh aspect, the axial direction of the rotation axis is in the width direction of the medium, and the plurality of rotating bodies provided in the width direction include two first rotating bodies arranged so as to be equal in distance from the center position on either side of the center position in the width direction, and two second rotating bodies located closer to the end of the medium in the width direction than the first rotating bodies, and arranged so as to be equal in distance from the center position on either side of the center position, wherein the conveying force imparted to the medium by the second rotating bodies is greater than the conveying force imparted to the medium by the first rotating bodies.

[0029] If the conveying force applied to the medium by the multiple rotating bodies provided in the width direction is all designed to be equal, then variations in conveying force may occur among the multiple rotating bodies due to assembly errors or aging, which may cause the medium to tilt. However, according to this embodiment, the conveying force applied to the medium by the second rotating body located on the outside in the width direction is greater from the outset than the conveying force applied to the medium by the first rotating body located inside the second rotating body, thus suppressing the occurrence of the aforementioned tilt.

[0030] A post-processing device according to the 13th embodiment is a post-processing device that performs post-processing on a medium recorded by a recording device, and is characterized by comprising: a processing tray for loading the medium to be processed; an alignment unit for aligning one end of the medium loaded on the processing tray; a rotating unit according to any of the first to 12 embodiments for applying a transport force toward the alignment unit to the medium; and a post-processing unit for performing post-processing on the medium loaded on the processing tray.

[0031] According to this embodiment, in a post-processing device that performs post-processing on a medium recorded by a recording device, any of the effects of the first to twelfth embodiments described above can be obtained.

[0032] A fourteenth aspect is characterized in that, in the thirteenth aspect, the present invention provides a guide located above the processing tray, which guides the medium sent toward the alignment section by the rotating unit toward the alignment section, wherein the guide is located offset from the conveying force application section in the axial direction of the rotating shaft.

[0033] According to this embodiment, the system includes a guide located above the processing tray that guides the medium being sent toward the alignment section by the rotating unit toward the alignment section, thereby ensuring that the end of the medium is properly brought into contact with the alignment section. Furthermore, since the guide is positioned offset from the conveying force application section in the axial direction of the rotating shaft, it is possible to prevent the guide from getting in the way when attaching or detaching the conveying force application section.

[0034] A 15th embodiment is a conveying force-applying member in a rotating unit comprising: a conveying force-applying member for applying a conveying force to a medium; a rotating shaft of the conveying force-applying member; a holding part interposed between the rotating shaft and the conveying force-applying member to hold the conveying force-applying member, the holding part having a shaft hole through which the rotating shaft passes, and being fixed in a state where it slides relative to the rotating shaft in the axial direction of the rotating shaft; and fixing means for fixing the conveying force-applying member to the rotating shaft, wherein the conveying force-applying member comprises a base having a fitting hole that fits onto the outer circumference of the holding part and an opening connected to the fitting hole; and a contact part provided on the base, which contacts the medium and applies a conveying force to the medium, wherein the base is deformable and detachable from the holding part via the opening in a direction intersecting the axial direction of the rotating shaft.

[0035] According to this embodiment, the holding portion has an axial hole through which the rotating shaft passes, and is fixed in a state where it slides in the axial direction of the rotating shaft relative to the rotating shaft. Therefore, even if the holding portion is made of a material with high hardness, it can be attached to the rotating shaft, and consequently, phase misalignment of the holding portion with respect to the rotating shaft can be suppressed. Furthermore, since the conveying force-applying part held by the holding part is detachable via the opening in a direction intersecting the axial direction of the rotating shaft, the conveying force-applying part can be easily replaced with the holding part. As a result, the holding part can be common to devices with different specifications, improving versatility.

[0036] The present invention will be described in detail below. The following describes a post-processing apparatus 30 according to one embodiment of the present invention. In each figure, the X-axis direction represents the depth direction of the post-processing device 30 and the recording system 1. Within the X-axis direction, the +X direction, indicated by the arrow, is from the back of the device to the front, and the -X direction is from the front of the device to the back. The X-axis direction is also an example of the width direction of the media. The Y-axis direction is the width direction of the post-processing device 30 and the recording system 1. Of the Y-axis directions, the +Y direction, indicated by the arrow, is to the left when viewed from the perspective of a user facing the front of the device, and the -Y direction is to the right. The Z-axis direction is the height direction of the post-processing device 30 and the recording system 1, and is a vertical direction. The +Z direction, indicated by the arrow, is vertically upward, and the -Z direction is vertically downward. In the following explanation, the +Z direction may be simply referred to as upward, and the -Z direction as simply downward.

[0037] As shown in Figure 1, the recording system 1 comprises a recording device 10 and a post-processing device 30. The recording device 10 according to this embodiment is an inkjet printer that performs recording by ejecting ink, which is an example of a liquid, onto a medium such as recording paper, and is equipped with a line head 18, which is an example of a recording unit. The recording device 10 is also a so-called multifunction device equipped with a scanner unit 12 on the top of the device.

[0038] The recording device 10 comprises a main body 14, a media storage section 16 for housing media, a media transport section (not shown) for transporting media, a line head 18 for recording on media, an internal discharge section 22 for discharging media, and a relay unit 24 for transporting media to the post-processing device 30. Inside the main body 14, a transport path TA is provided for transporting media.

[0039] The line head 18 has a plurality of ink ejection nozzles (not shown) arranged to cover the entire X-axis area of ​​the medium. The line head 18 records onto the medium by ejecting ink supplied from an ink tank (not shown) from the plurality of ink ejection nozzles toward the medium.

[0040] The recording medium from the recording device 10 is sent to the post-processing device 30 via the relay unit 24. The post-processing device 30 comprises a device body 32, a processing tray 42 and a stapler 34 (an example of a post-processing unit) located inside the device body 32, and a main tray 33 located outside the device body 32. The medium, transferred from the relay unit 24 to the main unit 32, is transported along the transport path TB inside the main unit 32 and sent to the processing tray 42.

[0041] The configuration of the post-processing device 30 will be further described below with reference to Figure 2. In the following, a medium will be denoted by the symbol P and referred to as medium P. A bundle of multiple mediums P will be denoted by the symbol Pt and referred to as a medium bundle Pt. In Figure 2, the A-axis direction is along the support surface 42a of the processing tray 42, and the +A direction within the A-axis direction is the direction in which the medium P is fed into the processing tray 42. The -A direction is the direction in which the medium P on the processing tray 42 is pulled back toward the rear end alignment section 39. In this embodiment, the A-axis direction includes the +Z direction component and the -Y direction component. The direction perpendicular to the A-axis direction when viewed from the X-axis direction is defined as the B-axis direction.

[0042] The guide member 35 constitutes part of the transport path TB and extends toward the processing tray 42. The medium P, transported along the guide member 35 in the -Y direction, is fed toward the processing tray 42 by transport rollers 46 driven by a motor (not shown).

[0043] The medium P fed into the processing tray 42 is subjected to a transport force toward the rear end alignment section 39 by the pull-back section 44 and pulled back in the -A direction. The pull-back section 44 consists of a first pull-back section 48 and a second pull-back section 60. The term "pull-back section" may be replaced with "paddle section". The second pull-back section 60 is an example of a rotating unit. The first pull-back section 48 has multiple contact portions 48a made of an elastic material such as rubber (three in this embodiment) along the rotational direction, and the contact portions 48a are rotatably mounted around a rotation axis 49 extending in the X-axis direction. The first pull-back section 48 is driven in the clockwise direction in Figure 2 by a motor (not shown), thereby applying a feeding force in the -A direction to the medium P fed into the processing tray 42. The configuration of the second pull-back section 60 will be explained in detail later.

[0044] A rear end alignment section 39 is provided in the -A direction relative to the processing tray 42. The rear end alignment section 39 has an alignment surface 39a parallel to the B axis direction, and the rear end Pe of the media bundle Pt on the processing tray 42 abuts against the alignment surface 39a, thereby aligning the rear end Pe of the media bundle Pt.

[0045] A first guide 55 and a second guide 56 are provided on the upper part of the processing tray 42. The first guide 55 and the second guide 56 guide the rear end Pe of the medium P, which is pulled back in the -A direction by the pull-back section 44, toward the rear end alignment section 39. This allows the rear end Pe of the medium P to properly abut against the rear end alignment section 39. The first guide 55 is formed of a metal plate, for example, and the second guide 56 is formed of a flexible sheet material, for example.

[0046] The side cursor 52 is provided to be movable in the X-axis direction by a drive source (not shown), and aligns the end of the media bundle Pt supported by the processing tray 42 in the X-axis direction by contacting it. The side cursors 52 are spaced apart along the X-axis direction, and two side cursors 52 are provided so as to be close to or far apart from each other. Figure 2 shows the side cursor 52 provided in the -X direction of the two side cursors 52.

[0047] The flap 37 is positioned alongside the rear end alignment portion 39 along the X-axis direction and is pivotable around a shaft portion 37a extending in the X-axis direction. The flap 37 presses the media bundle Pt on the processing tray 42 downwards in the vicinity of the rear end alignment portion 39. The pressing member 36 is provided so as to be able to swing around a shaft portion 36a that extends in the X-axis direction. The pressing member 36 is provided so as to be able to rotate by a motor (not shown), and by rotating, it knocks down the medium P that is being fed toward the processing tray 42 by the transport roller 46 toward the processing tray 42. As a result, the -A direction end of the medium P being fed toward the processing tray 42 is properly guided toward the rear end alignment portion 39.

[0048] A discharge roller 38, driven by a motor (not shown), is provided in the +A direction relative to the processing tray 42. A discharge driven roller 40 is also provided above the discharge roller 38 so as to be able to move back and forth relative to the discharge roller 38. The discharge driven roller 40 is separated from the discharge roller 38 except when the media bundle Pt is being discharged from the processing tray 42. When the media bundle Pt is being discharged from the processing tray 42, it moves toward the discharge roller 38 by a power source (not shown), and the media bundle Pt is nipped between it and the discharge roller 38. The discharge roller 38 feeds the media bundle Pt, which is supported on the processing tray 42 and has been stapled by the stapler 34, towards the lower support tray 54. In this embodiment, the post-processing is stapling by the stapler 34, but the post-processing is not limited to this, and may also be punching, which punches holes in the media bundle Pt, saddle stitching, or shift discharge, which alternately shifts the discharge position of the media bundle Pt in the media width direction. Alternatively, the media bundle Pt may be discharged without post-processing and stacked in a so-called "rod" on the main tray 33.

[0049] The lower support trays 54, although not shown in the figure, are provided in pairs spaced apart in the X-axis direction, i.e., in the media width direction, and are designed to move toward or toward each other by power from a drive source (not shown). The lower support trays 54 open when moved toward each other and close when moved toward each other. In Figure 2, the lower support tray 54 provided in the -X direction is shown among the two lower support trays 54 provided spaced apart in the media width direction.

[0050] The media bundle Pt discharged by the discharge roller 38 is temporarily supported by the closed lower support tray 54. When the lower support tray 54 opens, the media bundle Pt supported by the lower support tray 54 falls into the main tray 33. By providing such a lower support tray 54, the alignment of the media bundle Pt on the main tray 33 can be improved. Of course, it is also possible to discharge the media bundle Pt directly from the processing tray 42 to the main tray 33 without providing the lower support tray 54. The main tray 33 is provided so as to be displaceable in the Z-axis direction, i.e., the loading direction, by a motor (not shown).

[0051] Next, we will describe in detail the configuration of the second pull-back section 60, which is an example of a rotating unit. As shown in Figure 3, the second pull-back section 60 comprises a rotation axis 61 whose axis is in the X-axis direction, and a plurality of rotating bodies 62 provided at intervals along the axial direction of the rotation axis 61, i.e., the media width direction. In this embodiment, one rotating body 62 is arranged on each side of the media P's center position in the media width direction, and is positioned symmetrically with respect to the media P's center position. The second pull-back section 60 is driven by a motor (not shown) to rotate the rotating shaft 61, i.e., the rotating body 62, in the clockwise direction in Figure 2, thereby applying a feeding force in the -A direction to the medium P that has been fed into the processing tray 42.

[0052] As shown in Figures 3 and 4, the rotating body 62 is a rotating body in which a holding member 63, which is an example of a holding part, a conveying force applying member 65, which is an example of a conveying force applying part, and a fixing member 67, which is an example of a fixing means, are set together. The outer circumference of the rotating shaft 61 to which the rotating body 62 is attached has a first circular arc portion 61a and a first straight portion 61b along the circumferential direction, forming a D-cut shape when viewed from the axial direction (see Figure 8). On the outer circumference of the rotating shaft 61, the first circular arc portion 61a is formed as a smooth curved surface, and the first straight portion 61b is formed as a smooth flat surface. As shown in Figures 7(A) and (B), the holding member 63 has an axial hole 63d through which the rotating shaft 61 passes, and the axial hole 63d has a shape that fits with the outer circumference of the rotating shaft 61, that is, it forms a D-cut shape similar to the rotating shaft 61 when viewed from the axial direction (see Figure 8). This makes it possible to reliably suppress the phase shift of the holding member 63 relative to the rotating shaft 61 with a simple structure. However, any means may be used to fix the retaining member 63 to the rotating shaft 61 in the rotational direction. For example, the retaining member 63 may be fixed to the rotating shaft 61 with screws, or it may be fixed with adhesive, or a pin-shaped member may be passed between the retaining member 63 and the rotating shaft 61. In this case, the rotating shaft 61 may not have a first straight section 61b and may be perfectly circular when viewed from the axial direction. The rotating shaft 61 can be formed from metal or resin materials, but it is preferable that it has as high a hardness as possible from the viewpoint of suppressing twisting.

[0053] The retaining member 63 is fixed in a state where it is slid axially relative to the rotating shaft 61. In this embodiment, the rotating shaft 61 has a groove 61d into which a retaining ring 70 is fitted, as shown in Figure 5. After the retaining member 63 slides axially relative to the rotating shaft 61, it is fixed axially by being sandwiched on both sides in the axial direction by the retaining ring 70. However, any means may be used to fix the retaining member 63 axially to the rotating shaft 61. For example, the retaining member 63 may be fixed to the rotating shaft 61 with screws, or it may be fixed with adhesive, or a pin-shaped member may be passed between the retaining member 63 and the rotating shaft 61.

[0054] As shown in Figures 7(A) and (B), the outer circumference of the holding member 63 has a second arc portion 63a and a second straight portion 63b along the circumferential direction, forming a D-cut shape when viewed from the axial direction (see Figure 8). On the outer circumference of the holding member 63, the second arc portion 63a is formed as a smooth curved surface, and the second straight portion 63b is formed as a smooth flat surface except for the area where the protruding portion 63c, described later, is formed. The holding member 63 holds the conveying force applying member 65 on its outer circumference as shown in Figure 6. That is, the holding member 63 is interposed between the rotating shaft 61 and the conveying force applying member 65 to hold the conveying force applying member 65. The holding member 63 can be formed from a metal material, a resin material, or the like. The holding member 63 is made of a material with a hardness at least higher than that of the conveying force applying member 65, which will be described later. The retaining member 63 may be made of the same material as the rotating shaft 61. If the retaining member 63 is made of a different material than the rotating shaft 61, it may have the same hardness as the rotating shaft 61, or it may have a lower hardness than the rotating shaft 61, or it may have a higher hardness than the rotating shaft 61.

[0055] As shown in Figures 4 and 8, the conveying force-applying member 65 integrally comprises a base portion 65a and a plurality of contact portions 65b protruding from the base portion 65a in a direction including the radial direction. In this embodiment, three contact portions 65b are formed at equal intervals along the rotational direction. However, the formation position and number of contact portions 65b are not limited to this. The contact portions 65b come into contact with the medium with elastic deformation and apply a conveying force to the medium.

[0056] The base portion 65a has a fitting hole 65c that fits onto the outer circumference of the holding member 63, and also has an opening 65d connected to the fitting hole 65c. The base portion 65a is deformable, thereby allowing the opening 65d to be enlarged and then reduced. This makes the conveying force applying member 65 detachable from the holding member 63 in a direction intersecting the axial direction (for example, the Y-axis direction). The conveying force-applying member 65 can be formed from an elastically deformable material such as rubber or elastomer. However, for example, the base portion 65a and the contact portion 65b may be composite-molded from different materials. In this case, the base portion 65a can be formed from a resin material, and the contact portion 65b can be formed from rubber, elastomer, or the like so that its hardness is lower than that of the base portion 65a.

[0057] The fitting hole 65c of the conveying force applying member 65 has a shape that fits with the outer circumference of the holding member 63, that is, when viewed from the axial direction, it has a D-cut shape similar to the outer circumference of the holding member 63. This suppresses the phase shift of the conveying force applying member 65 relative to the holding member 63, that is, it suppresses the phase shift of the conveying force applying member 65 relative to the rotating shaft 61.

[0058] Furthermore, a radially projecting projection 63c is formed on the outer circumference of the holding member 63, on the second linear portion 63b. In contrast, the conveying force applying member 65 has a contact portion 65e that abuts against the projection 63c in the rotational direction. The contact portion 65e is composed of a first portion 65e-1 and a second portion 65e-2, and is configured to sandwich the projection 63c between the first portion 65e-1 and the second portion 65e-2 in the rotational direction. Since the holding member 63 has a protruding portion 63c and the conveying force applying member 65 has a contact portion 65e, the phase difference of the conveying force applying member 65 relative to the holding member 63 can be further suppressed, that is, the phase difference of the conveying force applying member 65 relative to the rotating shaft 61 can be further suppressed. Furthermore, since the protruding portion 63c is sandwiched between the first portion 65e-1 and the second portion 65e-2 in the rotational direction, the phase shift of the conveying force applying member 65 relative to the holding member 63 can be suppressed more reliably, that is, the phase shift of the conveying force applying member 65 relative to the rotation axis 61 can be suppressed more reliably.

[0059] Here, as shown in Figure 8, the protruding portion 63c is positioned offset from the center position R1 of the second linear portion 63b when viewed from the axial direction of the rotating shaft 61. This ensures that the orientation of the attachment of the conveying force applying member 65 to the holding member 63 is fixed, preventing incorrect assembly.

[0060] Furthermore, on the outer circumference of the holding member 63, an enlarged diameter portion 63e is formed at one axial end, as shown in Figures 7(A) and (B), and a projection portion 63f is formed at the other end. The enlarged diameter portion 63e and the projection portion 63f restrict the axial movement of the conveying force applying member 65 attached to the holding member 63.

[0061] Next, the fixing member 67 will be described. The fixing member 67 fixes the conveying force applying member 65 to the rotating shaft 61, and as shown in Figure 4, it comprises a fixed portion 67a which is the part fixed to the rotating shaft 61, and a restraining portion 67c which restrains the protruding portion 63c of the holding member 63 and the first portion 65e-1 and the second portion 65e-2 of the conveying force applying member 65.

[0062] A groove 67b with an axial opening is formed in the fixed portion 67a, and the fixed portion 67a is fixed to the rotating shaft 61 by a screw 68 through this groove 67b. In Figure 4, reference numeral 61c denotes a screw hole formed in the first straight portion 61b of the rotating shaft 61. An opening 67d is formed in the restraining portion 67c, and as shown in Figure 3, the protruding portion 63c of the holding member 63 and the first portion 65e-1 and the second portion 65e-2 of the conveying force applying member 65 fit into the opening 67d, and are restrained together in the rotational and axial directions. This makes it possible to more reliably suppress the phase shift of the conveying force applying member 65 with respect to the rotation axis 61.

[0063] However, the restraining portion 67c is not limited to this configuration; it is acceptable as long as it can fix the conveying force applying member 65 to the rotating shaft 61 in the rotational direction. However, it is more preferable to have a configuration that can restrict the expansion of the opening 65d of the conveying force applying member 65, as in this embodiment. Nevertheless, the means for restricting the expansion of the opening 65d of the conveying force applying member 65 and the means for fixing the conveying force applying member 65 to the rotating shaft 61 in the rotational direction may be configured separately.

[0064] In this embodiment, the fixing means for fixing the conveying force-applying member 65 to the rotating shaft 61 is composed of a fixing member 67. However, it is not limited to this, and the conveying force-applying member 65 may be fixed to the holding member 63 by fixing means such as double-sided tape, and thereby the conveying force-applying member 65 may be fixed to the rotating shaft 61. In this embodiment, the fixing member 67 is screw-fixed to the rotating shaft 61, but it is not limited to this, and the fixing member 67 may be fixed to the rotating shaft 61 by means of a snap-fit ​​or the like.

[0065] Furthermore, in this embodiment, the fixing member 67 has a fixed portion 67a and a restraining portion 67c that are offset in the axial direction, and on the opposite side of the fixed portion 67a from the restraining portion 67c in the axial direction, there is a phase defining portion 67g that contacts the first linear portion 61b of the rotating shaft 61 and defines the phase of the fixing member 67 with respect to the rotating shaft 61. A linear contact surface 67h is formed on the phase defining portion 67g, and when this contact surface 67h contacts the first linear portion 61b of the rotating shaft 61, the phase of the fixing member 67 with respect to the rotating shaft 61 is defined. This makes it possible to more reliably suppress the phase misalignment of the conveying force applying member 65 with respect to the rotating shaft 61. Furthermore, in this embodiment, the fixing member 67 has restricting portions 67e and 67f formed on both sides in the rotational direction relative to the restraining portion 67c, which also holds the conveying force applying member 65 in the rotational direction and suppresses phase displacement of the conveying force applying member 65 with respect to the rotational axis 61.

[0066] Next, as shown in Figures 3, 4, and 8, the second pull-back section 60 is equipped with a pressing section 72 that presses down on the medium from above at a position in the rotational direction that is out of phase with respect to the contact section 65b. As shown in Figure 8, the pressing section 72 is formed to protrude less radially than the contact section 65b. The pressing section 72 functions to press down on any bulges that occur in the medium P from above, suppressing the lifting of the medium P from the processing tray 42. This allows the medium P to be properly aligned. The pressing portion 72 can be formed from an elastic sheet material, and in this embodiment, it is formed from a PET (polyethylene terephthalate) sheet. The two retaining portions 72 are integrally formed by a connecting portion 72a and are fixed to the rotating shaft 61 by screws 68 together with the fixed portion 67a of the fixing member 67. This eliminates the need for a dedicated means to fix the retaining portions 72, thereby reducing the number of parts and lowering costs.

[0067] As described above, in the second pull-back section 60 according to this embodiment, the retaining member 63 has an axial hole 63d through which the rotating shaft 61 passes, and is fixed in a state where it is axially slidable relative to the rotating shaft 61. Therefore, even if the retaining member 63 is made of a material with high hardness, it can be attached to the rotating shaft 61, and consequently, phase displacement of the retaining member 63 with respect to the rotating shaft 61 can be suppressed. Furthermore, the number, thickness, and position of the contact portions 65b of the conveying force-applying member 65 may be changed according to the specifications of the device to which it is attached. For this reason, if the conveying force-applying member 65 and the holding member 63 are designed to correspond one-to-one, the design of the holding member 63 will also need to be changed, and the holding member 63 will also need to be replaced, resulting in a lack of versatility. However, since the conveying force-applying member 65, which is held by the holding member 63, can be attached to and detached from the holding member 63 via the opening 65d in a direction intersecting the axial direction of the rotation axis 61, the conveying force-applying member 65 can be easily replaced with the holding member 63. Therefore, the holding member 63 can be common to devices with different specifications, improving versatility.

[0068] Furthermore, since the conveying force-applying member 65, the holding member 63, and the fixing member 67 are combined into a single rotating body 62, and multiple rotating bodies 62 are provided in the axial direction of the rotating shaft 61, the medium P can be conveyed more reliably compared to a configuration with only one rotating body 62 in the axial direction. Furthermore, if multiple rotating bodies 62 are provided in the axial direction, and the conveying force applying member 65 is configured to be attached and detached in the axial direction, the other rotating bodies 62 will get in the way. However, since the conveying force applying member 65 can be attached and detached in a direction intersecting the axial direction, the other rotating bodies 62 do not get in the way, and the conveying force applying member 65 can be easily attached and detached.

[0069] Furthermore, the first guide 55 and the second guide 56, which are located on the upper part of the processing tray 42, are positioned offset from the conveying force applying member 65 in the axial direction of the rotation shaft 61, as shown in Figure 3. This prevents the first guide 55 and the second guide 56 from getting in the way when attaching or detaching the conveying force applying member 65.

[0070] In this embodiment, two rotating bodies 62 are provided in the axial direction, but this is not the only configuration. Furthermore, when multiple rotating bodies 62 are provided in the width direction, a configuration like the one shown in Figure 9 can be used as an example. In Figure 9, the rotating body 62 includes two first rotating bodies 62A, which are positioned so that their distance from the center position CL is equal to the center position CL in the width direction, and two second rotating bodies 62B, which are located closer to the end of the medium P in the width direction than the first rotating bodies 62A, and are positioned so that their distance from the center position CL is equal to the center position CL in the width direction. The conveying force applied by the second rotating bodies 62B to the medium P is greater than the conveying force applied by the first rotating bodies 62A to the medium P.

[0071] Specifically, for example, the conveying force-applying member 65B constituting the second rotating body 62B may be made of a material with higher hardness than the conveying force-applying member 65A constituting the first rotating body 62A. Alternatively, the axial width of the conveying force-applying member 65B may be made larger than the axial width of the conveying force-applying member 65A. Alternatively, the protruding length of the conveying force-applying member 65B may be made longer than the protruding length of the conveying force-applying member 65A. Alternatively, a combination of the above may be used. This makes it possible to make the conveying force applied by the second rotating body 62B to the medium P greater than the conveying force applied by the first rotating body 62A to the medium P.

[0072] This provides the following effects. If the conveying force applied to the medium P by the multiple rotating bodies 62 provided in the width direction is all equal, variations in conveying force may occur among the multiple rotating bodies 62 due to assembly errors or changes over time, which may cause the medium P to tilt. However, as described above, by making the conveying force applied to the medium P by the second rotating body 62B greater than the conveying force applied to the medium P by the first rotating body 62A, the variation in conveying force in the width direction described above can be suppressed, and the occurrence of the aforementioned tilting can be suppressed.

[0073] The present invention is not limited to the embodiments described above, and it goes without saying that various modifications are possible within the scope of the invention as described in the claims, and these modifications are also included within the scope of the present invention. For example, in this embodiment, the rotating unit according to the present invention is applied to the second pull-back section 60, but it may also be applied to the first pull-back section 48. [Explanation of Symbols]

[0074] 1…Recording system, 10…Recording device, 12…Scanner unit, 14…Main body, 16…Media storage unit, 18…Line head, 22…Internal discharge unit, 24…Relay unit, 30…Post-processing device, 32…Device body, 33…Main tray, 34…Stapler, 35…Guide member, 36…Pressing member, 36a…Shaft, 37…Flap, 37a…Shaft, 38…Discharge roller, 39…Rear end alignment unit, 40…Discharge driven roller, 42…Processing tray, 42a…Support surface, 44…Retraction unit, 46…Conveyor roller, 48…First retraction unit, 48a…Contact unit, 49…Rotation shaft, 52…Side cursor, 54…Lower support tray, 55…First guide, 56…Second guide, 60…Second retraction unit (rotation unit), 61…Rotation shaft, 61a ...First arc section, 61b...First straight section, 61c...Screw hole, 61d...Groove, 62...Rotating body, 62A...First rotating body, 62B...Second rotating body, 63...Holding member, 63a...Second arc section, 63b...Second straight section, 63c...Protruding part, 63d...Shaft hole, 63e...Enlarged diameter section, 63f...Projection, 65, 65A, 65B...Conveying force applying member, 65a...Base, 65b...Contact part, 65c...Fit 65d…Opening, 65e…Contact area, 65e-1…First part, 65e-2…Second part, 67…Fixing member, 67a…Fixed part, 67b…Groove, 67c…Restraining part, 67d…Opening, 67e, 67f…Restricting part, 67g…Phase defining part, 67h…Contact surface, 68…Screw, 70…Retaining ring, 72…Pressing part, 72a…Connecting part, P…Media, Pt…Media bundle, Pe…Rear end

Claims

1. A rotating unit that imparts a transport force to a medium by rotating, A conveying force applying unit having at least one contact portion in the rotational direction that comes into contact with the medium, and which applies a conveying force to the medium through the contact portion, The rotating shaft of the conveying force application unit, A holding portion interposed between the rotating shaft and the conveying force applying portion, the holding portion holding the conveying force applying portion, A fixing means for fixing the conveying force application unit to the rotating shaft, Equipped with, The holding portion has an axial hole through which the rotating shaft passes, and is fixed in a state where it slides relative to the rotating shaft in the axial direction of the rotating shaft. The conveying force application unit is, A base portion having a fitting hole that fits onto the outer circumference of the retaining portion, and an opening connected to the fitting hole, The base portion comprises the contact portion, The base is deformable, The conveying force application unit is detachably attached to the holding unit via the opening in a direction intersecting the axial direction of the rotation shaft. The outer circumference of the aforementioned rotating shaft has a first circular arc portion and a first straight portion along the circumferential direction. The shaft hole of the holding portion has a shape that fits with the outer circumference of the rotating shaft. The outer circumference of the holding portion has a second circular arc portion and a second straight portion along the circumferential direction. The fitting hole in the base has a shape that fits with the outer circumference of the retaining portion. A rotating unit characterized by the following features.

2. In the rotating unit according to claim 1, The holding portion is provided with a radially projecting projection on the second straight portion, The base of the conveying force application unit has a portion that contacts the protruding portion in the rotational direction. A rotating unit characterized by the following features.

3. In the rotating unit according to claim 2, The base of the conveying force application unit has a shape in which the protruding portion is sandwiched between the first portion and the second portion in the rotational direction. A rotating unit characterized by the following features.

4. In the rotating unit according to claim 3, The aforementioned protrusion is provided at a position offset from the center of the second straight section when viewed from the axial direction of the rotation axis. A rotating unit characterized by the following features.

5. In the rotating unit according to claim 4, the fixing means comprises a fixing member fixed to the rotating shaft, The aforementioned fixing member is The fixed part is the part that is fixed to the aforementioned rotating shaft, The system comprises the aforementioned protruding portion and a restraining portion that restrains the first portion and the second portion, A rotating unit characterized by the following features.

6. In the rotating unit according to claim 5, the fixed portion and the restrained portion are located at offset positions in the axial direction of the rotating shaft, The fixing member has a phase defining portion on the opposite side of the fixed portion from the restrained portion in the axial direction, which is in contact with the second linear portion of the rotation axis and defines the phase of the fixing member with respect to the rotation axis. A rotating unit characterized by the following features.

7. The rotating unit according to claim 5 is further provided with a pressing portion that presses the medium from above at a position in the rotational direction that is in a different phase from the contact portion, The pressing portion is fixed to the rotating shaft together with the fixed portion of the fixing member. A rotating unit characterized by the following features.

8. In the rotating unit according to claim 1, the conveying force applying unit comprises a plurality of contact portions in the direction of rotation. A rotating unit characterized by the following features.

9. In the rotating unit according to claim 1, the conveying force applying unit, the holding unit, and the fixing means are arranged as a set of rotating bodies, and a plurality of such rotating bodies are provided in the axial direction of the rotating shaft. A rotating unit characterized by the following features.

10. In the rotating unit according to claim 9, the axial direction of the rotating shaft is in the width direction of the medium, The rotating bodies, which are provided in multiple locations in the width direction, Two first rotating bodies are arranged such that the distance from the aforementioned center position in the width direction is equal to the aforementioned center position, A second rotating body located closer to the end of the medium in the width direction than the first rotating body, and two second rotating bodies arranged such that the distance from the center position is equal to the center position, Includes, The conveying force that the second rotating body imparts to the medium is greater than the conveying force that the first rotating body imparts to the medium. A rotating unit characterized by the following features.

11. A post-processing device that performs post-processing on a medium recorded by a recording device, A processing tray for loading media to be processed, A matching unit that aligns one end of the media loaded on the processing tray, The rotating unit according to any one of claims 1 to 10, which applies a transport force toward the alignment portion to the medium, A post-processing unit that performs post-processing on the media loaded in the processing tray, A post-processing device equipped with a post-processing device.

12. The post-processing apparatus according to claim 11, comprising a guide positioned above the processing tray, which guides the medium sent toward the alignment section by the rotating unit toward the alignment section, The guide is positioned in the axial direction of the rotating shaft, offset from the conveying force application section. A post-processing apparatus characterized by the following:

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