JP4593515B2 - Sheet medium processing apparatus and image forming system - Google Patents

Description

This invention relates to sheet-like medium treatment equipment, and an image forming system.

  In a punch unit that punches filing punch holes on an image-formed sheet discharged from an image forming apparatus, a sheet medium post-processing apparatus that performs post-processing such as stapling means and imprinting, and an image forming apparatus, discharging from the discharging means The incoming paper is stacked on a tray called a paper discharge tray, a stacking tray or the like. The stacked sheets are automatically aligned for subsequent use, but the degree of sheet alignment, that is, the accuracy of alignment becomes a problem.

  In FIG. 45 showing an example of a conventional paper processing apparatus, for example, a sheet-like medium (hereinafter referred to as paper) that is formed by an image forming apparatus (not shown) and sent toward the paper processing apparatus along the conveyance direction A. ) S is guided to a pair of paper discharge rollers 3 as discharge means through a paper discharge sensor that detects passage of paper. A tray 12 is positioned below the discharge roller 3. The sheet S discharged from the sheet discharge roller 3 in the discharge direction a (extension in the substantially horizontal plane and orthogonal to the axis of the sheet discharge roller 3) is disposed at the trailing end of the sheet S. After moving away from the vehicle, the vehicle falls onto the tray 12 and drops in the downward direction B due to inertia and its own weight.

  When there is no paper on the tray 12, the distance from the upper surface of the tray 12 to the nip portion of the paper discharge roller 3, and when the paper S is stacked on the surface of the tray 12, the top of the stacked paper S is loaded. The paper S is free-falled and landed by a free fall distance L from the upper surface to the nip portion.

  By the way, since this paper processing apparatus has a sorting function, the tray 12 can reciprocate in a shift direction c orthogonal to the discharge direction a in a horizontal plane with a predetermined amount of stroke required for sorting. The tray 12 is slidably held on a pedestal 4 extending in the shift direction c, and can be reciprocated on the pedestal 4 in the shift direction c by a drive mechanism (not shown).

  A predetermined number of sheets are stacked on the tray 12 stopped at the forward end of the reciprocating movement stroke. For example, when eight sheets are set as one and several paper bundles are sorted and stacked, <1> when the tray 12 is at the forward end, eight sheets are sequentially supplied from the paper discharge roller 3. It is discharged and loaded one after another. <2> Next, the tray 12 moves to the backward end, and when the tray 12 is at the backward end, the paper S is discharged from the paper discharge roller 3 and stacked. <3> When eight sheets are stacked at the backward end, the tray 12 moves to the forward end, and the same operation as the above <1> is performed.

  Thereafter, the same operation is repeated until a desired number of sheet bundles are stacked. As a result, on the tray 12, a set of eight sheets is regarded as one part, and a stacking state is obtained in which the step of the sheet end surface between the parts is sorted by the uneven step corresponding to the shift amount of the tray 12. Can do.

  In the paper processing apparatus having such a sorting function, conventionally, the paper S discharged from the paper discharge roller 3 simply drops freely in the space of the free fall distance L and is loaded on the tray 12. In other words, the paper S that is separated from the paper discharge roller 3 is in a free state until it is stacked on the tray 12, and if the lateral registration of the paper S received from the image forming apparatus is shifted or skewed, Sheet end surfaces in the shift direction c of the sheets stacked on the sheet are not aligned between the sheets, resulting in misalignment of sheets with a lateral deviation amount Δ.

  In a copy company or the like, since a bundle of sheets that have been sorted and stacked is applied to, for example, a punching machine in the next process, stacking in a highly accurate sorting state is required. If the sheet bundle has poor alignment accuracy, the sheet bundle taken out from the shift tray must be aligned again by a human hand and then applied to the punching machine, resulting in waste in terms of work efficiency. For this reason, the upper segment, for example, a so-called copier, requires strict alignment accuracy for the stacked sheets, and improvement of alignment accuracy is desired.

There are the following as this type of prior art.
(A) Two alignment members that can be moved independently on both sides in the width direction orthogonal to the sheet conveying direction are provided, and these alignment members shift the sheet in the width direction and sort the sheets by number of copies. Although the technology for executing the two processing operations is disclosed, the mechanism has a complicated structure because the alignment member performs the operations for performing the two processing of the sheet alignment processing and the shift processing. (For example, refer to Patent Document 1).
(B) A technique is disclosed in which a sheet is fed onto a carriage movable in a direction crossing the sheet discharge direction, and the carriage is moved until the sheet on the carriage is detected by a sensor to align the position of the sheet. It cannot be said that the technique is suitable for aligning a large number of stacked sheets (for example, see Patent Document 2).
(C) Although a technique for aligning transfer paper on a paper discharge tray by a jogger fence as an alignment means is disclosed, since transfer paper on a paper discharge tray is aligned, sorting cannot be performed ( For example, see Patent Document 3).
(D) A sheet is stacked between two discharge side fences provided on the discharge tray so as to face each other upright, and a guide portion that protrudes and retracts is provided inside each of the side fences. A technique is disclosed in which a sheet fed in between is bent by the protruding guide portion, and then the guide portion is retracted to cause the sheet to fall naturally onto a paper discharge tray. However, the paper cannot be sorted. (For example, refer to Patent Document 4).

JP-A-10-245148 Japanese Patent Laid-Open No. 5-286609 Patent Gazette (Patent No. 2761221) Japanese Utility Model Publication No. 5-10367

An object of the present invention is to provide a sheet-like medium processing apparatus and an image forming system capable of aligning and sorting sheet-like media with high accuracy and having a simple configuration.

In order to achieve the object, the present invention has the following configuration.
(1). In a sheet medium processing apparatus including a discharge unit that discharges a sheet medium conveyed and a tray on which the sheet medium discharged by the discharge unit is stacked.
The tray is capable of moving the tray by a predetermined amount in a shift direction orthogonal to the sheet-like medium discharge direction of the discharge means in order to sort a bundle of sheet-like medium stacked on the tray for each part .
Alignment means for aligning the sheet-like media stacked on the tray, and the alignment means allows the sheet-like medium discharged from the discharge means and stacked on the tray to be in the form of the sheet parallel to the discharge direction. A pair of aligning members that perform an aligning operation to align the positions of the end faces by moving the aligning section in a direction approaching the two end faces of the medium,
The pair of aligning members are pivotally attached to a fulcrum shaft located above the tray, and the lower end portion of the aligning member is lower than the upper surface of the tray by rotation due to its own weight moment about the fulcrum shaft. A recess is formed on the upper surface of the tray so that the lower end can enter, and the lower end is not in contact with the recess and is positioned in the recess. A rotation preventing member that contacts the upper end of the alignment member in a moving state and prevents rotation of the alignment member;
When there is no sheet-like medium on the tray, the upper end portion of the aligning member serves as a rotation preventing member at a position where the lower end portion of the aligning member rotated by the self-weight moment rotates into the recess. The rotation is prevented by contact,
When a bundle of sheet-like media is stacked on the tray so as to block a part of the concave portion , the pair of sheet-like media is stacked when a bundle of one sheet-like medium is stacked on the tray. The aligning member is prevented from rotating by the rotation preventing member, and the lower end portion of the aligning member is in a position below the lowermost sheet-like medium, and a bundle of a plurality of sheet-like media is placed on the tray. When one of the alignment members is loaded, the rotation of the one alignment member is blocked by the rotation blocking member, and the lower end of the alignment member is positioned below the lowermost sheet-like medium in the uppermost sheet-like medium bundle. there are, the other arranging member by contact with its own weight on the uppermost surface of the bundle of sheet-like medium parts under the lower end of the top of the other arranging member which rotates by the self-weight moment, the other and said rotation of the arranging member is prevented And (claim 1).
(2). (1) In the sheet-like medium processing apparatus according to (1), the concave portion has a size that can receive the aligning member when the aligning member performs the aligning operation with respect to a minimum-sized sheet-like medium. .
(3). In the sheet-like medium processing apparatus according to (1) or (2), the tray is moved by a predetermined amount in a shift direction orthogonal to the sheet-like medium discharge direction of the discharge means in order to sort the sheet-like medium stacked on the tray. Tray moving means for performing the sorting operation, and performing the aligning operation so that the sheet-like media stacked after the sorting operation are aligned at a different position from the sheet-like media stacked before the sorting operation. The recesses are sized to receive the pair of alignment members even when the tray is shifted in the shift direction (claim 3).
(4). In the sheet medium processing apparatus according to any one of (1) to (3), when the sheet medium is not stacked on the tray, a part of the pair of alignment members is stacked on the tray. The sheet medium is discharged by the discharging means in a state of being located below the surface (claim 4).
(5). In the image forming apparatus having an image forming unit that forms an image on a sheet-like medium and a conveying unit that conveys the image-formed sheet-like medium, the sheet-like medium according to any one of (1) to (4) A processing apparatus is provided (claim 5).
(6). 5. A sheet-like medium processing apparatus according to claim 1, further comprising: an image forming unit that forms an image on a sheet-like medium; and an image forming apparatus that includes a conveying unit that conveys the image-formed sheet-like medium. Are combined together or separately to form an image forming system.

In the first aspect of the present invention, by taking an embodiment in which crossed on the end faces of reliably sheet-like medium through the recess part of the member aligned with a possible sorting operation with a simple configuration, the bottom Even with respect to the sheet-like medium, a part of the aligning member can be surely applied to the end face of the sheet-like medium to be aligned.

The embodiment of the present invention will be described by dividing it into six cases 1 to 6 below.
[Case 1]
The sheet-like medium post-processing apparatus according to this example includes a post-processing unit that performs post-processing on the sheet-like medium and a conveying unit that conveys the post-processed sheet-like medium. Includes stamping, punching, stapling, and other processes for performing some processing on the sheet-like medium.

  The sheet-shaped medium post-processing apparatus is integrally configured with a sheet-shaped medium processing apparatus. In the sheet-like medium post-processing apparatus, it is possible to select whether or not post-processing execution is performed, and post-processing is performed when post-processing execution is selected or post-processing execution is not selected. The sheet-like medium that has not been obtained can be arranged in a state of being sorted on the tray by the sorting function and the aligning function of the sheet-like medium processing apparatus. FIG. 1 shows an example of the overall configuration of a sheet-like medium post-processing apparatus 51 according to this example.

[Case 2]
The sheet-like medium processing apparatus according to the present invention can be configured as <1> a single apparatus, or <2> another apparatus having means for discharging the sheet-like medium, for example, image formation without an aligning function It is possible to sort and align the sheet-like medium on the tray by using the aligning function, using the apparatus, a sheet-like medium post-processing apparatus having no aligning function, or the like. Here, the device <2> will be described. The device <1> will be described together with case 6.

[Case 3]
The aligning member driving apparatus according to this example can be configured integrally with the sheet-like medium processing apparatus of the cases 1 and 2 or can be configured as a single apparatus. This aligning member driving device is useful as a subunit constituting the main part of the sheet-like medium processing apparatus in the cases 1 and 2, and the sheet-like medium stacked on the tray is sandwiched between a pair of aligning members. Mechanical configuration for performing an aligning operation for contacting the end surface of the sheet-like medium and aligning the sheet-like end surface, and a retracting operation for retracting the aligning member to a position where it cannot interfere with the sheet-like medium after the aligning operation. It consists of parts.

[Case 4]
The sorting and sorting method according to this example relates to a procedure for sorting and sorting by combining the sorting operation and sorting operation by the sorting means of the cases 1 and 2. This sorting / sorting method can be executed by a control means using a CPU.

[Case 5]
The image forming apparatus according to the present example includes an image forming unit that forms an image on a sheet-like medium and a conveyance unit that conveys the image-formed sheet-like medium.

  The image forming apparatus is configured by combining a sheet-like medium post-processing apparatus in the form <1> or <2> of the case 2, and an image is formed by the image forming apparatus and conveyed by a conveying unit, and is ejected from a discharging unit onto a tray. This is an image forming apparatus that sorts and aligns the sheet-like medium discharged by the aligning means.

  An example in which the image forming apparatus is integrally combined with the sheet-like medium processing apparatus in the aspect <2> of the case 2 will be described later with reference to FIG. Note that an example in which the sheet-like medium processing apparatus as a single apparatus in the case 1 is combined with an image forming apparatus is combined with a sheet-like medium processing apparatus 51 ′ described later with reference to FIG. It is configured according to an example in which processing is combined.

[Case 6]
The image forming post-processing apparatus according to this example includes a case 2 sheet in an image forming post-processing apparatus that is a combination of an image forming apparatus that does not have a sorting and aligning function and a sheet-like medium post-processing apparatus that does not have a sorting and aligning function. The present invention relates to an image forming post-processing apparatus configured by combining a medium processing apparatus.

  The sheet-like medium on which the image is formed in the image forming apparatus reaches the sheet-like medium post-processing apparatus. The presence or absence of post-processing can be selected, and a sheet-like medium post-processed by selection or a sheet-like medium that has not been post-processed by selection can be prepared by combining a sheet-type medium processing apparatus combined with a sheet-type medium post-processing apparatus. Sorting is performed in a state of being aligned on the tray by the aligning operation by means.

  A case where an image forming post-processing apparatus is configured by combining a single sheet-like medium processing apparatus in the case <1> of the case 2 with an image forming post-processing apparatus having no alignment function will be described later with reference to FIG. When the sheet-like medium processing apparatus is configured integrally with the image forming processing apparatus in the case 2 <2>, the sheet-like medium post-processing apparatus in the case 1 is configured.

  In this specification, the sheet-like medium to be handled includes copy paper, transfer paper, recording paper, cover, cover paper (partition paper), computer form, special paper, OHP sheet, and the like. And display with the paper name.

In the following, the details of the sheet-like medium processing apparatus and the apparatus incorporating the sheet-like medium processing apparatus will be described in the order of the following items.
[1]: Example corresponding to cases 1 to 3 [1] -1: Sheet-shaped medium post-processing device [1] -2: Sheet-shaped medium processing device [1] -2-1: Tray [1] -2- 2: Tray elevating means, elevating direction positioning means [1] -2-3: Tray moving means [1] -2-4: aligning means [1] -2-4-2-a: aligning member [1]- 2-4-b: Alignment member moving means [1] -2-4-c: Alignment member position control [1] -2-4-d: Alignment member retracting means [1] -2-4-e : Alignment member drive unit [1] -2-5: Relationship between alignment member and tray [1] -2-5-a: Recess of tray [1] -2-5-b: Alignment member and paper Interference avoidance
<1> Retraction of alignment members
<2> Retraction by lowering the tray
<3> Retraction by a combination of <1> and <2> [2] Example corresponding to Case 4 [2] -1: Alignment operation [2] -1-1: One-side movement mode [2] -1-2 : Both-side movement mode [2] -2: Alignment procedure [2] -2-1: Alignment that switches between one-side movement mode and both-side movement mode according to the paper size
Procedure [2] -2-2: Alignment procedure based on both-side movement mode only [2] -2-2: Alignment procedure based on only one-side movement mode [3] Example corresponding to case 5 [4] Example corresponding to case 6 explain.

[1]: Example Corresponding to Cases 1 to 3 An example of a sheet medium processing apparatus configured integrally with an independent sheet medium post-processing apparatus connected to the image forming apparatus will be described. An aligning member driving device configured as a subunit of the sheet-like medium processing device will also be described.

[1] -1: Sheet-shaped Medium Post-Processing Device In FIG. 1, a sheet-shaped medium post-processing device 51 as post-processing means for performing post-processing on a sheet is connected to an image forming apparatus 50.

  In the image forming apparatus 50, the sheet S on which an image is formed by the image forming unit in accordance with the post-processing contents instructed by the operator is sent to the sheet-like medium post-processing apparatus 51.

  The post-processing contents in the sheet-like medium post-processing device 51 include the following modes when the image forming apparatus 50 is a copying machine. <1> Normal mode in which sheets are simply stacked in the order of discharge. In this mode, processing is executed by designating the paper size and the number of copies. <2> Staple mode for stapling. In this mode, the processing is executed by instructing the number of sheets, the number of copies, the number of bindings, the binding position, and the like. <3> A sorting mode for performing sorting processing. In this mode, processing is executed by designating the paper size and the number of sorting copies. <4> Punch mode. In this mode, drilling is performed.

  These work instructions for post-processing are transmitted from the operation panel of the copying machine to control means including a CPU by key operation, and post-processing is performed between the image forming apparatus 50 and the sheet-like medium post-processing apparatus 51 and the control means. After that, post-processing is executed.

The sheet-like medium post-processing device 51 shown in FIG. 1 can execute these post-processing <1> to <4>. In the sheet-like medium post-processing device 51, an inlet sensor 36, a transport roller 2a, a rotary punch 15, a transport roller 2b, and a branching claw 8a are provided in order of the paper traveling direction from the paper discharge transport path entrance 1 from the image forming apparatus 50. ing.
The paper S passes through the rotary punch 15 before reaching the branching claw 8a. In the punch mode <4>, the paper S is punched in the process of passing through the rotary punch 15.

  The sheet S that has reached the branching claw 8a is fed to the discharge tray 14 side in the normal mode <1> and to another path by switching the path by the rotation of the branching claw 8a. I understand.

  When the normal mode <1> is instructed, the sheets S are conveyed to the paper discharge tray 14 by the branching claws 8a and stacked by the designated number. When the <2> and <3> stapling modes and sorting modes are instructed, the branch claw 8a proceeds along a path different from that of the paper discharge tray 14 and reaches the next branch claw 8b.

  Also in this branching claw 8b, the path is switched and the case is sent to the stapling device 11 side for the <2> staple mode or to the tray 12 side for performing the sorting process for the <3> sorting mode. The course is divided into either.

When the <2> staple mode is instructed, the sheet S is directed from the branching claw 8b to the stapling apparatus 11. The conveying path toward stearyl over pull device 11 direction, the lower transport rollers 4a, 4b, the sheet discharge sensor 37, a paper feed roller (brush roller) 6 is arranged. The lower transport roller 4 a and the lower transport roller 4 b connected by the timing belt are driven by a motor 54.

  The sheet S is conveyed by the lower conveying roller 4a and the lower conveying roller 4b, and then sequentially fed into a staple tray (not shown) via the paper feeding roller 6, and a rear end for receiving the lower side of the sheet provided on the lower side of the staple tray. Each time the rear end is supported by the fence 19 and the rear end sensor 37 detects the rear end, the jogger fence 62 provided opposite to the direction penetrating the paper surface is moved in the opening / closing direction and the return roller 5 is moved. Alignment of the bundle of sheets S that has been performed is performed.

  The stapling device 11 moves and staples the sheet bundle that has been aligned. A discharge belt 10 for discharging is disposed behind the staple tray (not shown) as a conveying means for conveying the stapled (bound) sheet bundle.

  The discharge belt 10 is provided with a discharge claw 10a for hooking a bundle of sheets. When the staple processing is completed, the discharge belt 10 is rotated, and the stapled sheet bundle is lifted by the discharge claw 10a, and a pair as discharge means. To the paper discharge roller 3. This is the outline of the configuration and operation of the original functional part of the sheet-like medium post-processing apparatus.

[1] -2: Sheet-shaped medium processing apparatus The above-described sheet-shaped medium post-processing apparatus 51 can perform post-processing, which is an original function, and is sorted by the sheet-shaped medium processing apparatus as described below. The sheets after being stacked on the tray 12 to be operated are aligned. Therefore, even if the sheet is misaligned and stacked while being dropped from the discharge roller 3 onto the tray 12, the disordered sheet is sorted by the sorting function of the tray 12 and has a high end surface. Aligned with accuracy.

  The processing of the paper S in the transport path after the paper discharge roller 3 is performed by a sheet-like medium processing device that is integrated with the sheet-like medium post-processing device 51. After an overview of the sheet-like medium processing apparatus, the configuration and operation of each part constituting the sheet-like medium processing apparatus will be described. Here, an overview of the sheet-like medium processing apparatus configured integrally with the sheet-like medium post-processing apparatus 51 will be described with reference to FIGS. 1 to 6. Of course, the sheet-like medium processing apparatus has an independent unit configuration. You can also

  In FIG. 1, the sheet-like medium processing apparatus includes a paper discharge roller 3, a tray 12 on which the paper S discharged from the paper discharge roller 3 is stacked, a tray lifting / lowering unit that lifts and lowers the tray 12, and a position in the vertical direction of the tray 12. Positioning means for controlling the tray, tray moving means for reciprocating the tray 12 in a shift direction orthogonal to the discharge direction a in FIG. 1 (direction passing through the paper surface in FIG. 1), and aligning means for aligning the sheets stacked on the tray 12 99 or the like. Of these, the tray lifting means is 95 in FIG. 2 (a), the positioning means in the lifting direction is 96 in FIGS. 2 (a) and 2 (b), and the tray moving means is in FIGS. 3 and 4. At 98, the aligning means is indicated at 99 in FIG. 1, and details will be described later.

  An outline of the sorting and sorting operation by these members will be described. 1 to 4, the tray 12 is moved up and down by a tray lifting and lowering means 95, and is always controlled by a positioning means 96 to a position suitable for landing of the paper S. It is brought closer to one end side in the shift direction. The pair of aligning members 102a and 102b constituting the aligning means 99 stands by at a receiving position with a predetermined facing interval at which the sheet S discharged from the sheet discharge roller 3 can be received.

Every time the sheet S is discharged from the sheet discharge roller 3 and stacked on the tray 12, at least one of the aligning members 102a and 102b is operated to close the facing distance from the receiving position to slightly push the end surface of the sheet S. After a state of sandwiching the sheet bundle against the to return before Symbol receiving position by the operation to widen the facing distance. By performing this series of alignment operations, the end faces of the sheets are aligned.

When a predetermined number of sheets S constituting one unit (hereinafter simply referred to as a unit) as a sorting unit designated in advance is discharged and aligned, the alignment members 102a and 102b interfere with the sheet bundle of the aligned unit. In order to avoid this, the tray 12 moves to a retreat position away from the sheet bundle, and the tray 12 moves on the other end side in the shift direction by the tray moving means 98 as a sorting means while the aligned sheets are placed during the retreat. Move to.

  When the tray 12 is positioned on the other end side, the tray moving means 98 stops the tray 12. Further, the alignment members 102a and 102b return from the retracted position to the receiving position. As in the previous aligning operation, the next sheet S from the discharge roller 3 is discharged onto the tray 12 and stacked between the aligning members 102a and 102b. For each stacking, the aligning members 102a and 102b perform the aligning operation, sandwich the sheet bundle, and return to the receiving position. When a predetermined number of sheets S constituting the section are aligned, the alignment members 102a and 102b are retracted to avoid interference with the aligned sheet bundle, and the tray 12 is moved to the one end side in the shift direction by the tray moving means 98. Moved. Since the sheets S are stacked on the tray 12 during the sorting and aligning operation, the tray 12 is lowered by an appropriate amount by the tray lifting / lowering means 95 and the positioning means 96 in the tray lifting / lowering direction. However, it is controlled so that a constant height is maintained from the nip portion of the paper discharge roller 3 and the landing position is maintained at a constant level. The above is the outline of the configuration and operation of the sheet-like medium processing apparatus.

[1] -2-1: Tray In FIG. 1, when the sorting mode <3> is instructed, the sheet S is discharged from the branching claw 8b by the conveying roller 7 serving as a sheet conveying means, and the sheet discharge sensor 38. Then, the sheet is conveyed toward the tray 12 and sent out in the discharge direction a by the discharge roller 3.

  As shown in FIGS. 1 and 2 (a), the upper surface of the tray 12 is inclined so that the height of the upper surface increases as it advances in the discharge direction a. At the lower base end of the inclined surface of the tray 12, a rear end fence made of a vertical surface is positioned as indicated by reference numeral 40 in FIG.

  In FIG. 1, the sheet S discharged from the sheet discharge roller 3 enters between the aligning members 102a and 102b waiting at the receiving position, slides on the tray 12 along the above-described inclination due to gravity, and the rear end portion thereof The rear ends are aligned and aligned by abutting against the rear end fence 40. The sheets S on the tray 12 whose rear end portions are aligned are aligned by the alignment operation of the alignment members 102a and 102b.

  As shown in FIG. 2 (a), the upper surface of the tray 12 is formed with a recess 80a at a portion facing the alignment member 102a, and a recess 80b is formed at a portion facing the alignment member 102b. It is partially lower than the top surface. At least in a state where no paper is stacked on the concave portions 80a and 80b, the alignment members 102a and 102b at the receiving position maintain a state in which a part of the alignment members 102a and 102b enter the concave portions 80a and 80b and overlap the tray 12. It is supposed to be. This is because the alignment members 102a and 102b are surely applied to the end surface of the paper S in the alignment operation. The relationship between the recesses 80a and 80b and the aligning members 102a and 102b will be described in the section [1] -2-5: Relationship between aligning member and tray.

[1] -2-2: Tray lifting / lowering means, tray lifting / lowering positioning means FIG. 2 (a) explains the lifting / lowering means 95 for raising / lowering the tray 12, and FIGS. 2 (a) and 2 (b). When the paper S is discharged from the discharge roller 3, the vertical position of the upper surface of the tray 12 or the uppermost surface of the paper stacked on the upper surface of the tray 12 is an appropriate discharge position suitable for discharging the paper S from the discharge roller 3. The positioning means 96 for determining the position of the tray 12 in the raising / lowering direction by the raising / lowering means 95 will be described.

  1 and 2A, the paper discharge roller 3 is in a fixed position. Therefore, in the configuration in which the tray 12 does not move up and down, when the paper S is discharged and stacked on the tray 12, the height of the paper bundle becomes high, and this paper bundle blocks the discharge of the paper. It becomes impossible to discharge.

  The tray 12 is moved up and down by providing an elevating means, and the distance from the nip portion of the paper discharge roller 3 to the top surface of the tray 12 or the distance from the nip portion of the paper discharge roller 3 to the uppermost surface of the paper S on the tray 12. Can be maintained at an appropriate interval by which the paper is properly discharged by the positioning means. As a result, the sheet S can be discharged onto the upper surface of the tray 12 with little variation in the landing position.

  As shown in FIG. 2A, the tray 12 is suspended by a vertical lift belt 70. The vertical lift belt 70 is driven by a vertical motor 71 via a gear train and a timing belt, and is lifted or lowered by normal rotation or reverse rotation of the vertical motor 71. The vertical lift belt 70, the vertical motor 71, the gear train, the timing belt, and the like are main components of the lifting means 95 that lifts and lowers the tray.

  In FIG. 2A, a moving roller 72 made of a sponge-like material is in contact with the stacking surface of the tray 12 by its own weight so as to be able to swing. When the sheet S sent out on the tray 12 slides down along the inclined surface of the tray 12 and the rear end side is squeezed by the abutting roller 72, the sheet S is fed by the abutting roller 72 and directed downwardly. And a rear end fence 40 (see FIG. 3), and alignment in the vertical direction (paper feeding direction) is performed.

  Thus, the image-formed sheets S are sequentially discharged onto the tray 12 one after another, and the uppermost surface of the sheets S rises as a result of stacking. As shown in FIG. 2A, one end side of a paper surface lever 73 supported swingably on a shaft 73 a is provided on the uppermost surface of the stacked paper so as to contact with its own weight. The other end side is detected by a paper surface sensor 74 made of a photo interrupter.

  The paper surface sensor 74 is for controlling the vertical position of the tray 12 in the sorting mode, and the paper surface sensor 75 is for performing similar control in the staple mode. The positions are different.

  The paper surface lever 73 is rotated about its fulcrum by a moment due to its own weight, and when the tray 12 is lowered, the upper free end of the paper surface lever 73 turns on the paper surface sensor 75 or the paper surface sensor 74. Stopper means is provided to stop the rotation of the paper surface lever 73 at the position to be moved.

  This stopper means stops the rotation at the position where the paper surface lever 73 turns on the paper surface sensor 74 in the sorting process, and stops the rotation at the position where the paper surface sensor 75 is turned on in the staple mode. As the sheets S are stacked on the tray 12, the lower free end of the paper surface lever 73 is pushed up. As a result, when the paper surface lever 73 comes off the paper surface sensor 75 or the paper surface sensor 74, these sensors are turned off.

  Here, since the sorting mode is selected, the stacking surface of the sheets S rises each time the sheets S are discharged one by one, and the vertical motor 71 is driven each time the free end portion of the sheet surface lever 73 comes off the sheet surface sensor 74. Then, control is performed to lower the tray 12 until the paper surface sensor 74 is turned on. As a result, the condition of the landing position of the paper S on the tray 12 is controlled such that the interval between the paper discharge roller 3 and the tray 12 (the uppermost surface of the paper) is the appropriate interval. Here, the paper surface sensors 74 and 75, the paper surface lever 73, and the like are main components of the tray positioning means 96 that controls the height of the tray 12 to a certain height, and control is performed by detecting information for positioning. Send to means.

  The height position of the tray 12 under the appropriate interval is referred to as an appropriate discharge position, and is set as an appropriate position for receiving paper in a normal state other than paper fed in a special manner such as curling. It is the position.

  The proper discharge position of the tray 12 is naturally determined because the discharge conditions differ between when the sheets are discharged one by one in the sorting mode and when the bundle of sheets stapled in the staple mode is discharged. Different. This is also clear from the fact that the positions of the paper surface sensors 75 and 74 are different. At the end of the post-processing, an operation for lowering the paper discharge tray 12 by about 30 mm is performed in preparation for taking out the paper.

  In both the sorting mode and the stapling mode, the post-processing mode has a reference height suitable for each, and the paper S from the paper discharge roller 3 is discharged onto the tray 12, and each time the paper S is stacked, the tray 12 descends. Finally, the lower limit position is detected by the lower limit sensor 76. Further, when the tray 12 is raised, the tray 12 is raised to the reference height based on the detection information of the paper surface by positioning means such as the paper surface sensors 74 and 75 and the paper surface lever 73.

  The shift roller 9 is swingable about a fulcrum shaft. When the tray 12 reaches a predetermined ascent limit position, the swing end pushes the upper limit switch of the tray 12 to stop the vertical motor 23 to stop the tray. Damage due to 12 overruns is prevented. At the time of paper discharge, the tray 12 is controlled to an appropriate discharge position at an appropriate interval by the lifting means 95 and the positioning means 96 described above.

[1] -2-3: Tray Moving Means In FIG. 1, the tray 12 moves in the shift direction penetrating the paper surface of FIG. 1 in order to perform the sorting operation, that is, in the direction indicated by the symbol c in FIGS. After moving to one end, it is shifted so as to move to the other end side and move from the other end side to one end side. Assuming that one job is a unit of work when processing a predetermined number of discharged sheets constituting a sorting unit, the tray 12 is not shifted in the shift direction c in the same job, and one job (copy). ) Is moved in the shift direction c, and the sheet S for the next job is discharged at one moving end. Whenever the paper S is discharged and stacked on the tray 12, the aligning operation by the aligning members 102a and 102b is performed.

  A tray moving means 98 that performs a sorting operation by moving the tray 12 in the shift direction c to sort the sheets (including a bundle of sheets) stacked on the tray 12 will be described with reference to FIGS. Here, the amount of movement of the tray 12 is an amount necessary for sorting, and is set to about 20 mm, for example, although it depends on the paper size, paper type, operator preference, and the like.

  The tray moving means 98 includes a tray support structure that supports the tray 12 so as to be slidable on the base 8 as shown in FIG. 3, and a tray reciprocating mechanism that reciprocates the tray 12 as shown in FIGS. Become.

  The tray support structure 60 will be described with reference to FIG. In FIG. 3, two guide plates 30, 31 having a length in the shift direction c penetrating the paper surface and facing in the left-right direction are integrally provided on the upper portion of the base 8. A shaft protrudes outside each of the guide plates 30 and 31, and rollers 32 and 33 are supported on the shaft.

  On the other hand, at the bottom of the tray 12, a flat portion is formed which is wider than the distance between the rollers 32 and 33 in the left-right direction and has a depth that can sufficiently cover the shift amount of the tray in the shift direction c. The flat portion is placed on the rollers 32 and 33. In addition, two shafts are implanted in the flat portion of the tray 12 at positions corresponding to the insides of the guide plates 30 and 31, and rollers 34 and 35 are respectively attached to these two shafts. It is pivotally supported. These rollers 34 and 35 are in contact with the inner sides of the guide plates 30 and 31.

  The rollers 32, 33, 34, 35, the guide plates 30, 31, and the like constitute a tray support structure 60 that supports the tray 12 so as to be movable in the shift direction c. The tray 12 is supported by the rollers 32 and 33 by the tray support structure 60 and is guided by the guide plates 30 and 31 to be movable in the shift direction c.

  By combining the tray 12 supported by the tray support structure 60 with a tray reciprocating mechanism, a reciprocating driving force can be applied to the tray 12 to reciprocate in the shift direction c. Various tray reciprocating mechanisms are conceivable. For example, although not shown, there are a drive mechanism, a crank mechanism, and the like that provide a rack along the shift direction c and drive a pinion that meshes with the rack with a motor that can rotate forward and reverse.

By the tray moving means configured in this way, the tray 12 can be reciprocated by a predetermined amount necessary for paper sorting in the shift direction c.
A specific example of the tray reciprocating mechanism will be described below together with the tray position determining means. In FIG. 4, the tray 12 enters the concavo-convex portion of the end fence 40, and the end fence 40 moves in the shift direction c, so that the tray 12 also moves in the same direction. A bracket 41 having a long hole 41a is attached to the center of the end fence 40 in the shift direction c, and a pin 42 is inserted into the long hole 41a.

  The pin 42 is inserted and fixed to a worm wheel 43 that is pivotally supported by a main body (not shown). This insertion fixing position is eccentric from the rotation center of the worm wheel 43. This amount of eccentricity is ½ of the amount of movement dmm of the tray 12 in the shift direction.

  The worm wheel 43 is rotated by a worm 46 that is rotated from a motor 44 via a timing belt 45. The pin 42 is rotated by the rotational movement of the worm wheel 43, and the movement direction is changed so that the tray 12 performs linear reciprocation in the shift direction c according to the amount of eccentricity. The configuration around the eccentric rotating pin 42 and the elongated hole 41a constitutes a main part of the tray reciprocating mechanism.

  As shown in FIGS. 5 and 6, the worm wheel 43 includes two notches 43L and 43S having different sizes, and a convex portion having a length corresponding to a half circumference formed by the notches 43L and 43S. A disc-shaped encoder 47 having a short convex portion adjacent to this is provided.

  The cutout 43L is a long cutout, and the cutout 43S is a short cutout. The home sensor 48 detects the length of the notch of the encoder 47 by the interval between the two convex portions every half rotation of the encoder 47, and a signal for stopping and driving the motor 44 is generated from the control means. ing.

5, the motor 44 when the shorter notch-out 4 3S of the encoder 47 is rotated in the direction of arrow 49 is about to overlap the shorter projecting portion passes through the home sensor 48 is stopped. In this state, the pin 42 is on the right side, and the shift tray 12 is also moved to the right side by moving the end fence 40 of FIG. 4 to the right side.

  In FIG. 6, when the encoder 43 further rotates in the direction of the arrow 49 from the state shown in FIG. 5 and the long notch 43L passes through the home sensor 48 and overlaps with the long convex portion, the motor 44 stops. is doing. In this state, the pin 42 is on the left side, and the end tray 40 in FIG. 4 is also moved to the left side, so that the shift tray 12 is also moved to the left side.

  As described above, whether the tray 12 is on the right side or the left side can be determined based on the detection sensor by detecting the notch length of the encoder 47 by the home sensor 48. Here, the encoder 43 and the home sensor 48 constitute a main part of the tray position determining means.

  In this way, at the forward end of the stroke dmm of the reciprocating movement of the tray 12 in the shift direction c, the sheet corresponding to the sheet is discharged during the same job, and the sheet is shifted and moved in the next job at the backward end. The paper composing the paper is discharged.

  By repeating this sorting operation, the sheet bundle is stacked in a concavo-convex shape with a position shifted by dmm for each job (set), and the sheet bundle can be sorted for each set. The movement amount d can be set to an appropriate value of 5 to 25 mm with clear sorting according to the size of the paper, for example, a value of around 20 mm for A4 size.

[1] -2-4: Alignment means The upper ends of the alignment members 102a and 102b shown in FIGS. 1, 2 (a), 4 and the like are supported in a frame 90 shown in FIGS. ing. As a means for performing an aligning operation of the aligning members 102a and 102b and other operations to be performed in association with the aligning operation, the frame 90 has an aligning member moving means and an aligning member described in the following section. The retracting means, the aligning member driving device, and the like are configured, and the aligning means 99 is configured together with a control means composed of a microcomputer for controlling these means. This control means shares the control means of the sheet-like medium post-processing apparatus 51 shown in FIG. 1, and is connected to the aligning means 99 via an input / output line (not shown). The aligning means 99 is controlled by the control means to cause the aligning members 102a and 102b to perform the sheet aligning operation and other operations accompanying the aligning operation.

  Of the aligning means 99, the mechanical components excluding the control means are housed in a box-shaped frame 90 as shown in FIG. In FIG. 1, the frame 90 is screwed to the main body of the sheet-like medium post-processing device 51 or is detachably attached by means of an uneven engagement / disengagement means, so that it is easy for users who do not need the alignment function by the alignment means 99. It can be adapted to. Here, since the aligning members 102a and 102b are supported in the frame 90, the aligning unit 90 is indirectly supported by the main body of the sheet-like medium post-processing apparatus 51 as the apparatus main body above the paper discharge roller 3. Will be.

  As described above, since the support portions of the aligning members 102a and 102b are supported by the main body of the sheet-like medium post-processing device 51 above the sheet discharge roller 3, the tray 12 is moved up and down or the sheet from the sheet discharge roller 3 is transferred. The aligning members 102a and 102b can be operated without affecting the S discharging operation, and the aligning members 102a and 102b can be configured easily.

[1] -2-4-a: Alignment Member As shown in FIGS. 7 to 10 and the like, the pair of alignment members 102a and 102b is formed of a plate-like body, and the alignment portions 102a1 and 102b1 are the alignment members 102a and 102b. The opposing surfaces are flat surfaces perpendicular to the shift direction c.

  Since the aligning portions 102a1 and 102b1 are configured as flat surfaces whose opposing surfaces are orthogonal to the shift direction c as described above, the aligning members 102 and 103 are loaded on the tray 12 by moving in the shift direction c. The sheet bundle can be aligned by reliably bringing the aligning portions 102a1 and 102b1 into contact with and separating from the end surface of the sheet S. Moreover, it can be set as a compact structure by having set it as the plate-shaped object.

  In FIG. 7, the aligning members 102a and 102b are arranged so that the sheet S discharged from the paper discharge roller 3 shown in FIGS. 1 and 2 can be easily guided into the interval between the aligning members 102a and 102b. , 102b1 constitute relief portions 102a2 and 102b2 formed at an interval F ′ wider than the facing interval F of the alignment portions 102a1 and 102b1.

  When the sheet S is discharged onto the tray 12 during the aligning operation, the aligning members 102a and 102b are moved in a standby state in which the aligning portions 102a1 and 102b1 are moved in advance to a receiving position having a predetermined interval wider than the sheet width. At this receiving position, the discharge of the paper S from the paper discharge roller 3 is awaited. In FIG. 8, for example, the receiving position is a position that is 7 mm wider on one side than the paper width of the sheet bundle SS made of A4 size paper.

  The alignment members 102a and 102b stand by at a receiving position with a minimum interval that can accept the paper discharged with some variation in the shift direction c, and the paper is discharged and stacked on the tray 12. Then, it moves from this receiving position to the position shown in FIG. The reason why the receiving position is set in this way is that it takes time to return to the home position with a wide interval for each aligning operation.

  When a predetermined time elapses when the sheet S is discharged from the sheet discharge roller 3 and falls to the tray 12 and completely stops, (1) the alignment members 102a and 102b are moved toward each other as indicated by arrows in FIG. Alternatively, (2) by moving the remaining aligning member in the direction of the arrow while either one of the aligning member 102a or the aligning member 102b is not moved in FIG. 8, as a result, as shown in FIG. 9, the aligning portion 102a1 , 102b1 are brought into contact with two end faces parallel to the paper discharge direction of the paper bundle SS (direction passing through the paper surface) at an alignment position slightly narrower than the paper width.

  The degree of the fit is, for example, a state in which the alignment portions 102a1 and 102b1 are in pressure contact with the end surface of the sheet bundle SS so that the amount of biting is 1 mm on each side of the paper width, and the end surface of the sheet bundle SS is aligned by the amount of biting. It is done. Thereafter, the alignment members 102a and 102b return to the receiving position shown in FIG. 8 and wait for the discharge and stacking of the next sheet S.

  It should be noted that a mode in which the aligning members 102a and 102b are moved in the direction approaching each other during the aligning operation as described in <1> above is referred to as a double-sided moving mode. Further, as described in <2> above, a mode in which either the aligning member 102a or the aligning member 102b is stopped and the remaining aligning member is moved and aligned in the arrow direction is referred to as a one-side moving mode. These movement modes will be further described in “[2] -1 aligning operation” described later.

  In the same job, the aligning members 102a and 102b move between the receiving position shown in FIG. 8 and the aligning position shown in FIG. 9 at one moving end of the tray 12 until all sheets constituting the section are discharged. To do.

  When the aligning members 102a and 102b are waiting at the receiving position shown in FIG. 8, the position of the sheet S discharged from the sheet discharge roller 3 in the shift direction c is not exactly a fixed position, but varies due to skew or the like. is there. Therefore, the wider the receiving position determined by the facing distance between the aligning portions 102a1 and 102b1, the easier the paper can be received. However, if the receiving position is too large, the amount of movement of the aligning members 102a and 102b in the aligning operation increases. Takes time and cannot be adapted to high-speed delivery models.

  Therefore, the facing distance between the aligning portions 102a1 and 102b1 is set as much as possible, that is, the receiving position of the aligning members 102a and 102b is made as small as possible, and the facing distance between the upper portions of the aligning portions 102a1 and 102b1 is widened. To be able to accept. In the high speed machine, the sheet S can be discharged even during the aligning operation. Even in this case, if the escape portions 102a2 and 102b2 are provided, the sheet S does not collide with the aligning members 102a and 102b.

  As shown in an enlarged view in a two-dot chain line circle in FIG. 11, the alignment members 102a and 102b are formed so that the inner edge of each lower end portion has an acute angle θ. In this way, by setting the inner edge to an acute angle, the sheet S can be reliably captured during the aligning operation, and the sheet S is prevented from being pushed under the aligning members 102a and 102b and not being aligned. .

  Regardless of the one-side movement mode or both-side movement mode, when the part for the current job is stacked and shifted by a predetermined shift amount on the part of the previous job that has already been aligned, the A4 size is used. When the shift amount is about 20 mm, among the alignment members 102a and 102b in the current job, the alignment member located on the downstream side of the shift immediately before the current job is opposed to the upper surface of the sheet bundle in the previous job. And it will be in contact.

  In the one-side movement mode, the alignment member that is in contact with the upper surface of the sheet bundle in the previous job can be fixed during the alignment operation, and the opposite side alignment member can be moved and aligned. Since the aligning members 102a and 102b move, the aligning operation is performed while being in contact with the upper surface of the sheet.

  Further, in either the one-side moving mode or the both-side moving mode, if the tray 12 is shifted during the current job if it has returned to the receiving position shown in FIG. In order to avoid such a situation, the members 102a and 102b get stuck in the shifting direction on the tray 12 by hooking the portion of the previous job that has been aligned with great effort. A retreat operation for separating from the upper surface of the sheet is performed.

  The retracting operation includes a mode in which the aligning members 102a and 102b themselves are moved and a method of lowering the tray 12, and a specific example will be described later in the section “[1] -2-5-c retracting operation”. Of the methods of moving the members 102a and 102b, in the method of turning and retracting with one point as a fulcrum, the lower end portions of the aligning members 102a and 102b slide on the upper surface of the sheet during the retracting operation. It may be a factor to disturb the paper.

  As described above, in the both-side movement mode, there is rubbing with the upper surface of the sheet during the aligning operation, and there is rubbing with the upper surface of the sheet in the retreating operation in both the one-side moving mode and the both-side moving mode. Even if the degree is not the same, the lower ends of the aligning members 102a and 102b are rubbed even if they are different from the upper surface of the sheet S, and there is a possibility that the aligned sheets may be disturbed.

  Therefore, the material is selected so that the friction coefficient of the lower end portion of the aligning members 102a and 102b and the portion contacting the paper S is smaller than the friction coefficient between the papers, and the surface roughness is reduced. The coefficient of friction between the sheets was made smaller. Thereby, in the aligning operation and in the retracting operation, the already aligned portion (sheet bundle) is not disturbed.

[1] -2-4-b: Alignment member moving means Alignment members 102a and 102b have already been described to move from the receiving position shown in FIG. 8 to the alignment position shown in FIG. It was. In addition, the aligning members 102a and 102b can move from the receiving position shown in FIG. 8 to the home position moved further away from each other.

  In order to enable such movement in the shift direction c, the aligning means 99 includes aligning member moving means. A means for moving the aligning member will be described.

  When the one-side movement mode is adopted for the aligning member moving means, every time the tray 12 is shifted, the role of one of the aligning members 102a and 102b not moving and the other moving is changed. In the case of adopting the both-side movement mode, it is only necessary to perform the operation of moving both the aligning members 102a and 102b to the same amount, approaching and separating each time the tray 12 is shifted.

Therefore, an interlocking mechanism that interlocks one and the other of the aligning members can be employed as the aligning member moving means in the two-sided moving aspect, but the interlocking mechanism cannot be employed in the one-side moving aspect. In the interlocking mechanism, one of the alignment members and the other drive source for movement are shared, and thus generally has an advantage that the configuration is simple. Here, each alignment member 102a is used as a movement unit suitable for the one-side movement mode. , 102b will be described with reference to moving means capable of moving independently in the approaching / separating direction.
Of course, the moving means that can be moved in the contact / separation direction independently according to the following description can cope with the movement of the aligning member in the double-sided movement mode.

  In FIG. 10, when the tray 12 is viewed from the upstream side to the downstream side in the discharge direction a, if the left side of the shift direction c is the front side and the right side is the rear side, the alignment member 102a is the front alignment member, and the alignment member 102b Is a rear alignment member.

First, the moving means of the front alignment member 102a will be described.
In FIG. 10, the aligning member 102a is pivotally attached to a cylindrical shaft 108 parallel to the shift direction c. Both ends of the shaft 108 are fixed to the frame 90.

  As shown in FIGS. 12 and 13, the upper end of the aligning member 102a is fitted in a slit 105a1 parallel to a plane perpendicular to the shaft 108 formed on the cradle 105a. The cradle 105 a is slidably fitted to the shaft 108 and slidably fitted to a guide shaft 109 parallel to the shaft 108. Further, the upper part of the cradle 105a is fixed to the timing belt 106a.

  The timing belt 106a is stretched between the pulleys 120a and 121a as shown in FIG. The pulley 120 a is pivotally supported on a shaft fixed to the frame 90. The pulley 121a is fixed to the rotating shaft of the stepping motor 104a fixed to the frame 90.

  The stepping motor 104a, the cradle 105a, the timing belt 106a, the shaft 108, and the guide shaft 109 are main members that constitute the moving means of the receiving member 102a.

A means for moving the rear alignment member 102b will be described.
As shown in FIGS. 12 and 13, the aligning member 102b is pivotally attached to the same shaft 108 as the aligning member 102a. Further, the alignment member 102b is fitted in the slit 105b1 of the cradle 105b in the same manner as the engagement relationship between the alignment member 102a and the cradle 105a.

  The upper part of the cradle 105b is fixed to the timing belt 106b. The timing belt 106b is stretched between the pulleys 120b and 121b as shown in FIG. The pulley 120b is pivotally supported on a shaft fixed to the frame 90. The pulley 121b is fixed to the rotating shaft of the stepping motor 104b fixed to the frame 90.

  The stepping motor 104b, the cradle 105b, the timing belt 106b, the shaft 108, and the guide shaft 109 are main members constituting the moving means of the receiving member 102b.

  In this example, the shaft 108 and the guide shaft 109 have a function of stably supporting and guiding the cradles 195a and 105b and are shared, but the area used when the alignment members 102a and 102b are moved is the front side, Since it is shifted on the rear side, it can be provided independently.

  Thus, since the alignment members 102a and 102b can be said to have independent moving means, the timing belts 106a and 106b are driven by switching the stepping motors 104a and 104b independently for forward rotation and reverse rotation, respectively. The cradles 105a and 105b are respectively moved independently, and the aligning members 102a and 102b sandwiched between the slits 105a1 and 105b1 formed in the cradles 105a and 105b are independently moved in the shift direction c. .

  The aligning members 102a and 102b can be driven independently by the aligning member moving means configured as described above. For example, as in the case of performing the aligning operation in the one-side moving mode, if the aligning member 102a is fixed in an arbitrary job and the aligning member 102b is moved, the aligning member 102b is fixed in the next job after shifting the tray 12. The sorting and aligning operations can be performed by alternately switching the roles of the non-moving side and the moving side among the aligning members 102a and 102b, such as moving the aligning member 102a.

  In the aligning operation, it is also possible to adopt a both-side moving mode in which both aligning members 102a and 102b are moved. The one-side movement mode has a characteristic that the alignment state of the sheet placed on the tray 12 on the tray 12 is immovable compared to the both-side movement mode, so that the sheet alignment state is less disturbed. When configured, this one-side movement mode can also be adopted.

[1] -2-4-c: Position control of alignment member In FIGS. 12 and 13, the shaft 108 is a guide for guiding the alignment member 102a in the shift direction c, and also supports the alignment member 102a so as to be rotatable. It is also an axis. As described above, the upper end portion of the aligning member 102a is fitted in the slit 105a1, and the lower end side of the aligning member 102a extends from the shaft 108 toward the discharge direction a. For this reason, the position of the center of gravity of the aligning member 102a is also shifted in the discharge direction a, and the aligning member 102a receives a moment in the direction of the arrow K about the shaft 108 by its own weight.

  As shown in FIGS. 13 and 14, the inner part of the slit 105a1 is not opened and is closed. For this reason, the rotation of the aligning member 102a due to the moment in the direction of the arrow K is caused by the upper end edge 102a3 of the aligning member 102a coming into contact with the inner portion of the slit 105a1 unless there is interference with the paper S on the tray 12. Be blocked. In FIG. 14, the alignment member 102a in a state in which the rotation is prevented is indicated by a solid line.

  Since the slit 105a1 is formed in the cradle 105a, the cradle 105a is also a regulating member that regulates the amount of rotation of the alignment member 102a around the shaft 108. Exactly the same structure and action are also established between the aligning member 102b and the cradle 105b.

  The pair of aligning members 102a and 102b are restricted from rotating by their own moments due to the action of the rotation amount regulating member by the receiving plate 105a having the slit 105a1 closed at the back and the receiving plate 105b. A certain position in the direction is automatically held, and there is no need to provide a positioning mechanism in a special rotational direction.

  As shown in FIGS. 10, 11, 13 to 15, and 17 (b), at least when the sheets are not stacked on the recesses 80 a and 80 b, the lower ends of the alignment members 102 a and 102 b are placed on the tray 12. These alignment members 102a and 102b are set so as to be locked by the deep portions of the slits 105a1 and 105b1 below the stacking surface, that is, in the state where they are located in the recesses 80a and 80b.

  As shown in FIG. 8, when the aligning members 102a and 102b are in the receiving position in the shift direction c, a recess 80a is formed on the stacking surface of the tray 12 and facing the aligning member 102a. If the sheets are stacked so as to close the concave portion 80a, the aligning member 102a comes into contact with the upper surface of the sheet with its own weight. Similarly, if a concave portion 80b is formed in a portion facing the aligning member 102b at the receiving position, and the sheet is stacked so as to close the concave portion 80b, the aligning member 102b is self-weighted on the upper surface of the sheet. The contact is caused by the contact force caused by.

  The aligning members 102a and 102b always rotate with a moment due to their own weight, and can rotate in the recesses 80a and 80b if there is no sheet on the tray 12, so that the slits 105a1 and 105b1 are formed as shown in FIGS. It is locked by the back of the. Thus, the rotation in the direction of the arrow K is prevented, but the rotation in the direction opposite to the direction of the arrow K is not prevented. Therefore, when the sheets S are stacked on the tray 12 so as to close the recesses 80a and 80b, the alignment members 102a and 102b come into contact with the sheets S on the tray 12 by their own weight.

  As described above, when there is no paper on the tray 12, the lower ends of the aligning members 102a and 102b are positioned in the recesses 80a and 80b by their own weight, and when there is paper, they are in contact with the uppermost surface of this paper by their own weight. Become. In any of these states, it is possible to shift to an alignment operation by movement in the shift direction. Therefore, these states are referred to as an alignment operation position for convenience of the following description. In FIG. 15 as a representative example, the position of the aligning member 102a when there is no paper is shown as the aligning operation position. However, when there is paper, the lower end of the aligning member 102a abuts on the upper surface of the paper with its own weight. It will be in the state. The alignment operation position shown in FIG. 15 includes any of these states. Also, the alignment member 102b can assume the same operating position as in the alignment member 102a.

  As described above, the aligning members 102a and 102b in the receiving position shown in FIG. 8 are not aligned with the recesses 80a and 80b in the aligning operation position shown in FIG. A state in which a part of the paper enters is held, and if paper is stacked on the recesses 80a and 80b, the paper comes into contact with the top surface of the paper by its own weight.

  The aligning members 102a and 102b are placed at the receiving position in FIG. 8 in the shift direction c, and at the aligning operation position in FIG. 15 in the rotational direction about the shaft 108, and the sheets S are aligned in these states. When stacked on the tray 12 between the members 102a and 102b, it is possible to align the sheets stacked on the tray 12 by moving both or one of the alignment members 102a and 102b and performing an alignment operation. it can.

  By appropriately setting the position of the center of gravity of the aligning members 102a and 102b, the contact pressure with respect to the sheet S can be adjusted to be small, and the already aligned sheets can be prevented from being disturbed during the sorting and aligning operation.

  7 to 9, shield plates 105a1 and 105b1 are attached to the cradles 105a and 105b, respectively. When the stepping motors 104a and 104b rotate so as to move the cradles 105a and 105b away from each other, The shielding plate 105a1 of the pedestal 105a is inserted into the home position sensor 107b and optically shielded, and the shielding plate 105b1 of the pedestal 105b is inserted into the home position sensor 107b and optically shielded. The state is detected by the home position sensors 107a and 107b, and the stepping motors 104a and 104b are controlled to stop based on the detection signals.

  The state in which the shielding plates 105a1 and 105b1 are respectively detected by the home position sensors 107a and 107b is the home position of the alignment members 102a and 102b. This home position is a sheet of various sizes for which the alignment members 102a and 102b are to be sorted and aligned. Of these, the position is sufficiently open than the maximum width.

  The alignment members 102a and 102b stand by at this home position before entering the sorting and aligning operation. In FIG. 7, the alignment members 102a and 102b are at the home position.

Arranging member 102a, 102b, as shown in FIG. 8, the stepping motor over 104a from each home positions, 104b are shown in FIG. 8 by a predetermined pulse equivalent amount according to the sheet width of the sheet S coming discharged from the sheet discharge roller 3 Driven in the direction of the arrow and waits at the receiving position, the paper falls to the shift tray 12 and completely stops and is stacked, and then moves to the alignment position shown in FIG. 9 to perform the alignment operation. At this time, the sheet bundle SS stacked on the tray 12 is aligned, and moves to the receiving position in FIG. 11 and waits in order to enter the next sheet receiving state again.

  Such an operation is repeated, and when a series of jobs related to the alignment operation for a predetermined number of copies is completed, the alignment members 102a and 102b move to the home position shown in FIG. 7 again.

  Thus, moving means such as stepping motors 104a and 104b, cradles 105a and 105b including shielding members 105a1 and 105b1, timing belts 106a and 106b, shaft 108, guide shaft 109, home position sensors 107a and 107b, and control means. Accordingly, the alignment portions 102a1 and 102b1 of the alignment members 102a and 102b can be positioned at at least two positions of the receiving position shown in FIG. 8 and the alignment position shown in FIG. In this way, by setting the receiving position, it is possible to receive and align the sheets with a movement amount of the alignment members 102a and 102b during the alignment operation smaller than the movement amount from the home position.

[1] -2-4-d: Retracting means for aligning member In FIGS. 12 to 16, the aligning member 102a is pivotally attached by the shaft 108 as described above. An L-shaped notch is formed at a site upstream of the. Of the cutouts, when the aligning member 102a is in the aligning operation position shown in FIG. 15, the surface that is in a state along the substantially horizontal direction is referred to as a pushing surface, and is denoted by reference numeral 102a4. Similarly, the pushing surface 102b4 is formed also about the alignment member 102b.

  A shaft 110 parallel to the shaft 108 is in contact with the pushing surfaces 102a4 and 102b4 by its own weight. Both end portions of the shaft 110 in the longitudinal direction of the shaft 110 are fitted into vertically elongated holes 90 a and 90 b formed in the side plate portion of the frame 90 so as to be movable up and down.

  As shown in FIGS. 10, 12, and 15, one end side of an L-shaped lever 113 having a shaft 112 supported by a frame 90 rides on the center of the shaft 110 with its own weight. The other end of the lever 113 is connected to the plunger of the solenoid 115 via a spring 114. The solenoid 115 is provided on the frame 90.

When the solenoid 115 is off (non-excited), the aligning members 102a and 102b are brought into contact with the inner end of the slit 105a1 as shown in FIGS. The lower end portions of 102a and 102b are in contact with the sheet on the tray 12, so that the upper end edge portion 102a3 is slightly spaced from the inner portion of the slit 105a1 and is in the alignment operation position shown in FIG.
In this aligning operation position, as described above, the aligning members 102 a and 102 b are in contact with the uppermost surface portion of the sheets stacked on the tray 12 or in the recesses 80 a and 80 b on the upper surface of the tray 12.

  As shown in FIG. 16, when the solenoid 115 is turned on (excited), the plunger of the solenoid 115 is pulled and the lever 113 rotates. Accordingly, as shown in FIGS. 12 and 13, the shaft 110 is guided and pushed down by the lever 113 into the elongated holes 90 a and 90 b provided in the frame 90.

  As shown in FIGS. 12 to 16, since the shaft 110 is engaged with the pushing surfaces 102a4 and 102b4 among the notches formed in the alignment members 102a and 102b, the shaft 110 is pushed down as shown in FIG. As a result, the aligning members 102a and 102b rotate in the direction opposite to the direction of the arrow K, and the upper side of the tray 12 that is largely separated from the concave portion 80a and the concave portion 80b or from the uppermost surface of the paper stacked on the tray 12 Move to position.

  The positions of the aligning members 102a and 102b when moved above the tray 12 are indicated by a two-dot chain line in FIG. 14 and by a solid line in FIG. 16, and this position is referred to as a retracted position. The shaft 110, the lever 113, the solenoid 115, and the like constitute a retracting unit that places the aligning members 102a and 102b in the retracted position.

[1] -2-4-e: Alignment Member Drive Device In FIGS. 12, 13, 15, and 16, the components supporting the alignment members 102a and 102b share the alignment members 102a and 102b. A shaft 108 as a fulcrum shaft pivotally attached to the shaft 108, and push surfaces 102 a 4 and 102 b 4 as the action points on the alignment member shifted from the shaft 108, and the alignment members 102 a and 102 b are rotated around the shaft 108. The cradle 105a, 105b provided with the inner portions of the slits 105a1, 105b1, respectively, which can prevent rotation by a moment about the shaft 108 due to the weight of the alignment member 102a, 102b due to its own weight. The shaft 108 also serves as a guide shaft that guides the alignment members 102a and 102b in the shift direction c, which is the alignment direction. The cradles 105a and 105b are also configured to serve as driving means for moving the aligning members 102a and 102b in the shift direction c, and are further aligned in and out of the two end surfaces of the sheet-like medium. And a pair of aligning members that perform an aligning operation for aligning the positions of the end faces.

  If this configuration is referred to as an aligning member driving device, the aligning member driving device can abut the aligning members 102a and 102b on the upper surface of the paper S with a load corresponding to a moment due to its own weight, and adjust the load. Thus, the contact pressure on the sheet S can be freely adjusted, and when there is no sheet S, the aligning member 102a is engaged with the upper part of the aligning member 102a at the back of the slit 105a1 as shown by the solid line in FIG. 102a and 102b can be placed in the recesses 80a and 80b of the tray 12, and the alignment portions 102a1 and 102b1 can be reliably brought into contact with the end face of the sheet S.

  Further, in the aligning member driving device, it is possible to switch between a state in which the pushing surfaces 102a4 and 102b4 as acting points are pushed by acting on the shaft 110 as a pushing shaft and a state in which the pushing is released. By providing the switching drive means mainly composed of the lever 113 and the solenoid 115, the aligning members 102a and 102b are simultaneously retracted from the uppermost surface of the sheet S, and are in contact with the rotational moment due to their own weight. Can be switched.

[1] -2-5: Relationship between Alignment Member and Tray The positioning means 96 described with reference to FIG. 2 allows the vertical position of the upper surface of the tray 12 or the uppermost surface of the paper stacked on the upper surface of the tray 12 to be changed from the discharge roller 3. The position of the tray 12 in the up-and-down direction is controlled so as to be an appropriate discharge position suitable for discharging the paper S, and the alignment operation position described with reference to FIG. 15 is set at this appropriate discharge position. .

  When the aligning members 102a and 102b move in the shift direction c and perform the aligning operation, the aligning function is performed well, and when the tray 12 is shifted for sorting, the sheets on the tray 12 Interference with the alignment members 102a and 102b is avoided.

[1] -2-5-a: Recesses of tray When the alignment members 102a and 102b are in the alignment operation position described with reference to FIG. 15, the alignment members 102a and 102b are placed in the recesses 80a and 80b provided on the tray 12. The lower end portion partially enters and is not in interference with the tray 12. The tray 12 at this time is controlled to an appropriate discharge position by the positioning means 96 in the tray raising / lowering direction as described with reference to FIG.

  As shown in FIG. 1, FIG. 2 (a), FIG. 13, etc., by forming the recesses 80a, 80b, the lower end portions of the alignment members 102a, 102b are located in the recesses 80a, 80b, that is, more than the top surface of the tray By being positioned below, the lower end portion of the aligning member 102a102b, more specifically, the aligning portions 102a1 and 102b1 positioned inside the lower end portions of the aligning members 102a and 102b surely cross the end surface of the sheet S via the recesses 80a and 80b. In this manner, the aligning portions 102a1 and 102b1 can be surely aligned with the end surface of the bottom sheet S as well.

  The alignment operation by the alignment members 102a and 102b is performed in the recesses 80a and 80b.

  In order to enable the alignment members 102a and 102b to operate between the home position shown in FIG. 7 and the receiving position shown in FIG. 8 and to avoid interference with the tray 12 during operation, the recesses 80a and 80b are aligned when performing the alignment operation. The size of the members 102a and 102b is set so as to be sufficiently acceptable even in the stroke range. In this example, the recesses 80 a and 80 b have a length in the shift direction c and are opened at the end surface of the tray 12.

  Various sizes of paper S to be discharged to the tray 12 are planned. In the case of the minimum size paper, the amount of movement during the alignment operation of the alignment members 102a and 102b is the largest. However, the minimum size paper is also sized to accept the alignment members 102a and 102b.

  In FIGS. 17A and 17B, if the sheet width of the minimum size is t ′, the minimum interval t between the recesses 80a and 80b has a relationship of t ′> t.

  Among the aligning operations, in the one-side moving mode, for example, the aligning member 102a is fixed at a position near the inner end of the recess 80a, and the aligning member 102b is a minimum size paper that allows for an appropriate shift margin from the inner end of the recess 80b. Is made to wait at a position having an acceptable waiting interval W. In FIG. 17A, the maximum movement amount of the aligning member 102b is the distance α to the inner end of the recess 80b, and the alignment member 102b is moved within the range of the maximum movement amount α and aligned in contact with the end face of the minimum size paper. .

  Further, in the both-side movement mode, in FIG. 17A, a waiting interval W is taken at a position where the alignment members 102a and 102b are equally distributed from the inner ends of the recesses 80a and 80b, and the alignment members 102a and 102b are respectively Align by moving 1/2 the amount of movement in the one-side movement mode.

  By forming the minimum interval t between the recesses 80a and 80b so that the aligning member can be received within the range in which the aligning operation can be performed on the minimum size paper, the aligning members 102a and 102b can be operated without interfering with the tray 12 on the minimum size paper. Can be aligned.

  In the example of FIG. 17, the alignment portion 102a1 of the alignment member 102a is located in the vicinity of the inside of the recess 80a (or a position with a slight margin) as shown in the figure. From this state, the alignment portion 102a1 is aligned from the inner end of the recess 80a. If the tray 12 is moved in the direction in which the portion 102a1 is separated, the recesses 80a and 80b are sized to receive the alignment member 102a102b within the range of the distance α of the tray 12. Accordingly, the recesses 80a and 80b can avoid interference between the tray and the aligning member even when sorting the minimum size paper.

  The recesses 80a and 80b do not need to be deep enough for the purpose of overlapping the alignment members 102a and 102b. However, if the recesses 80a and 80b are also used as gaps for inserting hands when taking out the paper, the function is It is sufficient if the size corresponds to.

  In FIG. 17, the recesses 80a and 80b not only have a minimum interval t in the shift direction c but also in the depth direction, the lower ends of the alignment members 102a and 102b are recessed 80a and 80b throughout the standby and alignment operations. It is necessary to be within. For this reason, in FIGS. 13 and 14, a space of β is provided between the bottoms of the recesses 80a and 80b and the lower ends of the alignment members 102a and 102b.

  In a state where no sheets are stacked on the tray 12, the lower ends of the alignment members 102a and 102b are in the recesses 80a and 80b. The recesses 80a and 80b end at the center of the tray 12 leaving a minimum interval t. Therefore, if the aligning members 102a and 102b are moved in a direction in which they approach each other due to a malfunction, the aligning members 102a and 102b may collide with a step portion having the minimum interval t and be damaged. For this reason, when the aligning members 102a and 102b reach any position close to the ends of the recesses 80a and 80b with the minimum interval t, a safety switch is provided so as to stop the driving of the stepping motors 104a and 104b. I'm trying to keep things from happening.

[1] -2-5-b: Avoiding interference between the aligning member and the paper When the job is completed, the aligning members 102a and 102b remain in the receiving position shown in FIG. If the sheet bundle SS is moved to the position, the aligned sheet bundle SS is caught on the lower ends of the alignment members 102a and 102b as the tray 12 is shifted, and the alignment is disturbed. Therefore, in order to avoid this, the paper on the tray 12 and the aligning members 102a and 102b are separated and retracted in advance by the retracting means before the tray 12 is shifted.

  In addition, the aligning members 102a and 103a are moved to a position further spaced apart from the receiving position in preparation for the case where the sorting of the predetermined number of copies is finished and the paper width is changed at the time of the next sorting of the predetermined number of copies. There is a need. In order to prevent the alignment members 102a and 102b from interfering with the sheets on the already aligned tray 12 when the alignment members 102a and 102b are moved, a position where the alignment members 102a and 102b are opened from the receiving position, Before moving to the home position or any position narrower than the home position, the paper on the tray 12 and the alignment members 102a and 102b are separated and retracted in advance to avoid interference with the paper S on the tray 12.

  There are three modes of retraction: a method of moving the aligning members 102a and 102b, a method of moving the tray 12, and a method of moving the aligning members 102a and 102b and moving the tray 12. In order to determine the evacuation amount, it is preferable to specifically determine the amount in the actual apparatus in consideration of the relationship between the curl degree of the sheet and the shift amount of the tray.

<1> Retraction of alignment members
12 to 16, the shaft 110, the lever 113, the solenoid 115, and the like constitute a retracting unit that places the aligning members 102a and 102b in the retracted position.

  Whenever the job is finished by the retracting means, that is, before the tray 12 is shifted, the solenoid 115 is turned on in advance, and the aligning members 102a and 102b are placed in the retracted position as shown in FIG.

  Alternatively, when the sorting of a predetermined number of copies is completed, the aligning members 102a and 102b are placed in the retracted position as shown in FIG. 16 as necessary.

  As shown in FIG. 14, in the retracted position, the lower end portion (the portion that overlaps the tray 12) of the alignment member in FIG. 15 is pushed up, and a gap is generated between the tray 12. Since the tray 12 moves in the shift direction c in order to sort when a gap is generated, contact between the top surface of the sheet and the aligning members 102a and 102b can be avoided.

  The aligning members 102a and 102b placed in the retracted position shown in FIG. 16 by the retracting means can return to the aligning operation position shown in FIG. 8 by the moment due to the weight of the aligning members 102a and 102b simply by turning off the solenoid 115. Can do. However, the timing to return from the retracted position to the alignment operation position is after the alignment members 102a and 102b have moved to the receiving position shown in FIG.

  When the aligning operation is a one-side movement mode, when the aligning members 102a and 102b are returned to the aligning operation position, one of the aligning members gets on the sheet bundle in the previous job, and the other aligning member is the sheet bundle in the previous job. In the next job performed after the tray 12 is shifted, the aligning member that has been on the sheet bundle in the previous job does not move and is positioned outside the end face of the sheet in the previous job. The aligning member contacts and separates from the end face to perform the aligning operation.

  When the aligning operation is a double-sided movement mode, when the aligning members 102a and 102b return to the aligning operation position, one of the aligning members gets on the sheet bundle in the previous job, and the other aligning member is the sheet bundle in the previous job. However, in the next job to be performed after shifting the tray 12, the alignment member that has been on the sheet bundle in the previous job and the previous job are the same. Both of the aligning members positioned outside the end face of the sheet are brought into contact with and separated from the end face of the sheet bundle to perform the aligning operation.

  In either the single-side movement mode or the double-side movement mode, the paper may be taken out from the tray 12 after the alignment members 102a and 102b complete the alignment operation for a series of paper. Also in this case, if the aligning members 102a and 102b are moved from the aligning operation position shown in FIG. 15 to the retracted position shown in FIG.

<2> Retraction by Lowering the Tray By lowering the tray 12 from the proper discharge position by the lifting / lowering means 95 shown in FIG. 2A, the sheets on the tray 12 and the alignment members 102a and 102b when the tray 12 is shifted Interference can be avoided.

  The lowering state of the tray 12 due to these reasons is that the sheet size to be aligned is determined after the tray 12 has moved by a predetermined shift amount necessary for sorting or when sorting the next predetermined number of copies. Is continued until the aligning members 102 and 103 are moved to the receiving position according to the above, and then the tray 12 is raised to the proper discharge position. As a result, the sheet can be discharged onto the tray in a good state, and the aligning operation can be executed.

<3> Retraction by a combination of <1> and <2> By turning on the solenoid 115 of the above <1> and operating the aligning members 102a and 102b, and driving the elevating means 95 of <2> This is a combination of retreat for lowering the tray 12. The extra evacuation amount is required, and the necessary evacuation amount is ensured by turning on the solenoid 115 of <1> above or when the evacuation amount of driving the lifting means 95 of <2> is not sufficient. can do. Further, since the aligning members 102a and 102b and the tray 12 are moved away from each other, the necessary retraction amount can be ensured in a short time.

  A case where the curl of the paper S is large can be considered as a case where an extra large evacuation amount is required. When the aligning members 102a and 102b and the tray 12 shift relative to the shifting direction c, the sheet S is curled as shown in FIG. 18, and if the curl amount is large, the normal retraction amount cannot cover it. There is.

  For example, when the sheet S is curled in the middle recess, the maximum height h1 of the sheet from the recess 80b when the shift amount is c1 as shown in FIG. 18A and the shift as shown in FIG. 18B. When comparing with the maximum height h2 of the sheet from the recess 80b at the amount c2, if c1 <c2, the case where the shift amount c2 is large as shown in FIG. As shown in (a), the height position of the uppermost surface of the paper S tends to be higher than when the shift amount c1 is small.

  Based on such characteristics, if necessary, the tray 12 can be lowered and the aligning members 102a and 102b can be retracted to ensure an amount that does not interfere with the top surface of the sheet.

[2] Example Corresponding to Case 4 [2] -1: Alignment Operation As an alignment operation, <1> either the alignment member 102a or the alignment member 102b is left stationary, and the remaining alignment member is moved to the stationary alignment member side. There are two types of movement modes: a one-side movement mode in which the alignment members 102a and 102b are moved and aligned in a direction approaching each other.

  In the one-side movement mode, the non-moving-side aligning member is brought into contact with the previously aligned paper of the previous job, so there is an advantage that there is less risk of paper disturbance in the aligning operation, but the aligning member must be operated individually. Therefore, the operation mechanism becomes complicated.

In the double-sided movement mode, the pair of aligning members alternately come into contact with the paper of the previous job that has already been aligned, so the friction coefficient of the contact portion of the aligning member with the paper is made smaller than the friction coefficient between the sheets, etc. Although consideration is required, there is an advantage that the driving mechanism is simplified because a mechanism for operating the aligning member in an interlocked manner can be employed.
Below, each alignment operation | movement in the one side movement aspect and a both-sides movement aspect is demonstrated.

[2] -1-1: One-side movement mode Alignment operation by the one-side movement mode by the alignment members 102a and 102b will be described with reference to FIGS. 19 is a view of the tray 12 as viewed from the upstream side to the downstream side in the discharge direction a in FIG. 1, FIGS. 21 to 22 are perspective views of the aligning operation, and FIG. 19 (a) is a perspective view of FIGS. (B) corresponds to FIG. 22, and FIG. 19 (c) corresponds to FIG.

  In FIG. 1, the paper S that has passed through the transport path in which the transport roller 7, the paper discharge sensor 38, the paper discharge roller 3, and the like are disposed is discharged from the paper discharge roller 3 in the discharge direction a.

[First job]
In FIG. 19A and FIG. 20, the paper S is affected by gravity and proceeds in the direction of arrow B obliquely downward and falls onto the tray 12. Here, several sheets constituting a part have already been stacked. Prior to the discharge of the paper S, the tray 12 is moved in advance to one end side in the shift direction c, for example, the rear side by the tray reciprocating mechanism described with reference to FIGS. 4 to 6, and the alignment member is shown in FIG. Position, the alignment operation position shown in FIG. 15, and the first sheet bundle SS-No. 1 is loaded to some extent.

  When the sheet S is discharged, the aligning member 102b does not move, and the aligning member 102a moves to the sheet bundle SS-NO. 1 in the direction of approaching the sheet bundle SS-No. 9 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 1 and moved to the alignment position shown in FIG. By this aligning operation, the sheet bundle SS-NO. No. 1 is aligned in a state where there is no lateral deviation amount Δ that occurs while the paper S falls the free fall distance L. Thereafter, the aligning member 102a moves backward and returns to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  First sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 1 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

[Second job]
First sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 1, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 is shifted from the rear side to the front side.

  After the shift, the aligning members 102a and 102b move from the retracted position shown in FIG. 16 to the aligning operation position according to FIG. 15, and become the receiving position shown in FIG. This state is shown in FIGS. Due to the shift of the tray 12, the front alignment member 102a is moved to the first sheet bundle SS-NO. 1, the rear alignment member 102b is in a predetermined receiving position. In FIG. 19B and FIG. 21, the second sheet bundle SS-No. 2 is loaded to some extent.

  When the sheet S relating to the second job is discharged, the front alignment member 102a is not moved and the rear alignment member 102b is replaced with the second sheet bundle SS-NO. 2 is moved in the direction approaching the sheet bundle SS-No. 2 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 2 and moved to the alignment position shown in FIG. By this aligning operation, the second sheet bundle SS-NO. 2 is aligned. Thereafter, the aligning member 102b moves backward and returns to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  Second sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 2 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

[Third job]
Second sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 2, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 is shifted from the rear side to the front side.

  After the shift, the aligning members 102a and 102b move from the retracted position shown in FIG. 16 to the aligning operation position according to FIG. 15, and become the receiving position shown in FIG. This state is shown in FIG. 19 (c) and FIG. Due to the shifting of the tray 12, the rear alignment member 102b is moved to the second sheet bundle SS-NO. 2, the front alignment member 102a is in a predetermined receiving position. In FIG. 19C and FIG. 22, the third sheet bundle SS-No. 3 is loaded to the extent that there are sheets constituting the sheet 3.

  When the sheet S related to the third job is discharged, the rear aligning member 102b is not moved, and the front aligning member 102a is replaced with the third sheet bundle SS-NO. 3 is moved in a direction approaching 3 and the sheet bundle SS-No. 3 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 3 and moved to the alignment position shown in FIG. By this aligning operation, the third sheet bundle SS-NO. 3 are aligned.

  Thereafter, the aligning member 102a moves backward and returns to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  Third sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 3 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

Third sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 3, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 shifts from the rear side to the front side, and waits for the leading paper to be discharged.

  Thereafter, the same procedure as described above is repeated.

[2] -1-2: Both-side movement mode The alignment operation by the both-side movement mode by the alignment members 102a and 102b will be described with reference to FIG. FIG. 23 is a view of the tray 12 as viewed from the upstream side in the discharge direction a toward the downstream side in FIG.

  In FIG. 1, the paper S that has passed through the transport path in which the transport roller 7, the paper discharge sensor 38, the paper discharge roller 3, and the like are disposed is discharged from the paper discharge roller 3 in the discharge direction a.

[First job]
In FIG. 23A, the sheet S falls on the tray 12 as in the case of the one-side movement mode. Here, several sheets constituting a part have already been stacked. Prior to the discharge of the paper S, the tray 12 is moved in advance to one end side in the shift direction c, for example, the rear side by the tray reciprocating mechanism described with reference to FIGS. 4 to 6, and the alignment member is shown in FIG. Position, the alignment operation position shown in FIG. 15, and the first sheet bundle SS-No. 1 is loaded to the extent that there are sheets constituting 1.

  When the sheet S is discharged, both the aligning members 102a and 102b become the sheet bundle SS-NO. 1 in the direction of approaching the sheet bundle SS-No. 9 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 1 and moved to the alignment position shown in FIG. By this aligning operation, the sheet bundle SS-NO. As in the case of the one-side movement mode, 1 is aligned in a state where there is no lateral deviation amount Δ that occurs while the paper S falls the free fall distance L. Thereafter, the alignment members 102a and 102b move backward and return to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  First sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 1 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

[Second job]
First sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 1, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 is shifted from the rear side to the front side.

  After the shift, the aligning members 102a and 102b move from the retracted position shown in FIG. 16 to the aligning operation position according to FIG. 15, and become the receiving position shown in FIG. This state is shown in FIG. Due to the shift of the tray 12, the front alignment member 102a is moved to the first sheet bundle SS-NO. 1, the rear alignment member 102b is in a predetermined receiving position. In FIG. 23B, the second sheet bundle SS-No. 2 is loaded to the extent that there are sheets of paper constituting the second.

  When the sheet S relating to the second job is discharged, the alignment members 102a and 102b are moved to the second sheet bundle SS-NO. 2 is moved in the direction approaching the sheet bundle SS-No. 2 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 2 and moved to the alignment position shown in FIG. By this aligning operation, the second sheet bundle SS-NO. 2 is aligned. Thereafter, the alignment members 102a and 102b move backward and return to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  Second sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 2 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

[Third job]
Second sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 2, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 is shifted from the rear side to the front side.

  After the shift, the aligning members 102a and 102b move from the retracted position shown in FIG. 16 to the aligning operation position according to FIG. 15, and become the receiving position shown in FIG. This state is shown in FIG. Due to the shifting of the tray 12, the rear alignment member 102b is moved to the second sheet bundle SS-NO. 2, the front alignment member 102a is in a predetermined receiving position. In FIG. 23C, the third sheet bundle SS-No. 3 is loaded to the extent that there are sheets constituting the sheet 3.

  When the sheet S relating to the third job is discharged, the aligning members 102a and 102b are moved to the third sheet bundle SS-NO. 3 is moved in a direction approaching 3 and the sheet bundle SS-No. 3 is brought into contact with or hitting the end face of the sheet parallel to the discharge direction a so as to sandwich the sheet 3 and moved to the alignment position shown in FIG. By this aligning operation, the third sheet bundle SS-NO. 3 are aligned.

  Thereafter, the alignment members 102a and 102b move backward and return to the receiving position shown in FIG. Such an operation is performed every time the sheet S is discharged and stacked on the tray 12.

  There are papers that are ejected with or without a shift command signal. The sheet with the shift command signal is the leading sheet of the copy, and the control means recognizes whether the sheet is accompanied by the shift command signal when the sheet passes the paper discharge sensor 38.

  Third sheet bundle SS-NO. If the control means does not recognize the shift command signal after the discharge of the predetermined number of sheets constituting 3 is completed, this means the end of the job. Therefore, the tray 12 is not shifted and the alignment members 102a and 102b are moved to the home position. Return to (see FIG. 7).

Third sheet bundle SS-NO. When the control means recognizes the shift command signal after the discharge of the predetermined number of sheets constituting 3, the sheet is the first sheet of the next job, and until the sheet reaches the sheet discharge tray 12. Then, the tray 12 is shifted for the next job. In this shift, the aligning members 102a and 102b are moved to the retracted position shown in FIG. 16 (or the tray 12 is lowered , or the aligning member is retracted and the tray is lowered , etc.). Originally, the tray 12 shifts from the rear side to the front side, and waits for the leading paper to be discharged.

  Thereafter, the same procedure as described above is repeated.

[2] -2: Alignment Procedure As described above, the alignment operation has a one-side movement mode and a both-side movement mode. The procedure for executing each movement mode is executed by a control unit that controls the image forming apparatus 50 and the sheet-like medium post-processing apparatus 51 in FIG. The control means includes a microcomputer.

[2] -2-1: Alignment procedure for switching between one-side movement mode and both-side movement mode according to the sheet size In the both-side movement mode, the alignment members 102a and 102b are alternately in contact with the upper surface of the stacked sheets, and the alignment operation At this time, the upper surface of the sheet is rubbed, so that the stacked sheets may be disturbed particularly with small-sized sheets, but the alignment is good. On the other hand, in the one-side movement mode, the aligning members 102a and 102b do not move the aligning member on the side in contact with the upper surface of the stacked paper and the other aligning member moves, so that the upper surface of the stacked paper in the process of aligning The aligning member is not rubbed, and even a small-sized sheet does not disturb the stacked sheet, but the control becomes complicated. The alignment accuracy is the same for the one-side movement mode and the two-side movement mode.

  As described above, in the both-side movement mode, the stacked sheets may be disturbed in association with the sorting operation for the small size paper, but the moving mechanism and control of the aligning member can be relatively simple. For example, the aligning member 102a, The moving mechanism 102b can be a rack and pinion mechanism as shown in FIG.

  On the other hand, in the one-side moving mode, there is no possibility of disturbance of the stacked paper accompanying the sorting and aligning operation even with small size paper, but the aligning member moving mechanism is as shown in FIGS. Each member requires a moving mechanism and a motor, and its control is complicated.

  As described above, the movement mode of the aligning member has advantages and disadvantages. In this example, the drive mechanism shown in FIGS. 7 and 8 adopts two configurations as the alignment member moving mechanism, and the two-sided movement mode and the one-sided movement mode are selectively used according to the paper size. .

  By turning on the main switch that controls the image forming apparatus 50 and the sheet-like medium post-processing apparatus 51 in FIG. 1, the initial routine shown in FIG. 24 is executed. In this initial routine, a “tray shift position check” subroutine is executed in step P1.

  The contents of the “tray shift position check subroutine” at step P1 are shown in FIG. In FIG. 25, the solenoid 115 is turned on in step P2. Therefore, in FIG. 15, the lever 113 is pulled by the solenoid 115 and the aligning members 102a and 102b in the aligning operation position are displaced to the retracted position as shown in FIG. This is to prevent the lower end portions of the alignment members 102a and 102b at the alignment operation position from interfering with the tray 12 or the paper on the tray 12 when the tray 12 is shifted.

  Since a certain amount of time A1 is required for the aligning members 102a and 102b to move to the retracted position, in order to earn this time, the solenoid timer is reset in step P3 to start timing, and in step P4, the solenoid timer is set. Wait until the time exceeds the set time A1 of the timer, and when the set time A1 has elapsed, proceed to Step P5.

In step P5, the motor 44 (see FIG. 4) for shifting the tray 12 is turned on and driven. The rotation direction of the motor 44 is constant. Since it is unknown where the current position of the tray 12 is, the position is confirmed. Therefore, the motor 44 is rotated until the home sensor 48 is turned on in Step P6 and Step P7. Accordingly, the control means at the time of the step P7 is aware that the encoder 4 7 is in the state shown in FIG. 5 or 6.

  When the home sensor 48 is further turned on and the motor 44 is further rotated, the time until the home sensor 48 is turned off (step P8) and then turned on (step P10), that is, from the current on to the next time. The time until turning on is measured by a shift counter, and the position of the tray 12 is recognized based on the length of the time measured. For this reason, in step P9, the shift counter is reset to start timing.

  When the home sensor 48 is turned on in step P10, the motor 44 is stopped (turned off) in step P11, and the value of the shift counter at that time is chucked in step P12. In step P12, if the count value of the shift counter is larger than the predetermined value B1, the pre-tray flag is set to 1 in step P13, and if not larger than B1, the pre-tray flag is set to 0 in step P14. In step P15, the solenoid 115 is turned off and this routine is finished.

  Incidentally, when the count value of the shift counter is larger than the predetermined value B1, as shown in FIG. 6, it is a stop after elapse of a time corresponding to the long notch 43L, and when it is not larger than the predetermined value B1. As shown in FIG. 5, it is a stop after a lapse of time corresponding to the short notch 43S. This state corresponds to the state shown in FIG. 4, and the tray 12 has moved to the alignment member 102b side.

When the initial routine shown in FIG. 24 ends, the main routine shown in FIG. 26 is always executed. In FIG. 26, the main routine mainly includes a subroutine for movement control by aligning member size in step P20 for moving the aligning members 102a and 102b to a predetermined receiving position in accordance with the sheet size, and the sheet in step P21 for controlling sheet conveyance. Subroutine for conveyance control, subroutine for jogging control in step P23 relating to the both-side movement mode, subroutine for jogging control in step P24 relating to the one-side movement mode, and avoiding interference between the sheet S on the tray 12 and the alignment members 102a and 102b It consists of a shift control subroutine in step P25. Here, the subroutine of Step P25 can be executed by arbitrarily selecting any one of the routines of the shift control shown in FIGS. 31, 32, and 33.

  With reference to FIG. 27, movement control by alignment member size will be described. In step P30, the size of the sheet S to be discharged onto the tray 12 is checked. The paper size is obtained based on, for example, paper size information instructed by the operator in the image forming apparatus 50. By checking the paper size, the receiving position (see FIG. 8) and the aligning position (see FIG. 9) of the aligning member are determined.

  If the aligning members 102a and 102b are located at the home position (see FIG. 7) and are still in the aligning operation position in accordance with FIG. Are stacked, the paper and the aligning members 102a and 102b interfere with each other.

  In order to avoid this, <1> a method of moving the aligning members 102a and 102b, <2> a method of moving the tray 12, and <3> a method of moving the aligning members 102a and 102b and moving the tray 12 There are three. Here, the method <1> was adopted.

  The alignment members 102a and 102b are placed at the retracted position shown in FIG. As a procedure for this, the operations of Steps P31, P32, and P33 according to Steps P2, P3, and P4 in FIG. 25 are performed. After the aligning members 102a and 102b have moved to the retracted position shown in FIG. 16, the stepping motors 104a and 104b in FIG. 7 are driven in step P34, and the aligning members 102a and 102b are in the shift direction c and approach each other. 8 to the receiving position in FIG. 8 according to the paper size.

When predetermined pulses are input to the stepping motors 104a and 104b and the movement of the aligning members 102a and 102b is finished, the solenoid 115 that has been on until then is turned off in step P36, and the aligning members 102a and 102b rotate by their own weight. Then, it moves to the alignment operation position shown in FIG. Thereby, the alignment members 102a and 102b are in the receiving position shown in FIG. 8, and are in the alignment operation position shown in FIG.

  Paper conveyance control will be described with reference to FIG. In this control, it is checked in step P37 whether the paper discharge sensor 38 (see FIG. 1) is turned on, that is, whether the paper S has been discharged. When the discharge of the sheet S is confirmed in step P37, it is checked in step P38 whether the control means has received the shift command. This shift command is a signal for instructing that sorting should be performed, and is a signal accompanying the sheet when the conveyed sheet is the leading sheet of the section to be sorted.

  If the paper S checked by the paper ejection sensor 38 is not accompanied by a shift command, that is, if the paper to be ejected this time is not the first paper in the set, it is necessary to perform the aligning operation. On condition that the sensor 38 is turned off, that is, the sheet S has passed the paper discharge sensor 38, the jogging flag related to the aligning operation is set to 1 in step P40, the jogging timer is reset in step P41, and the process returns to the return.

  If the paper S checked by the paper ejection sensor 38 is accompanied by a shift command, that is, if the paper to be ejected this time is the first paper in the copy, it is the first sheet of the job, and the tray 12 Needs to be shifted in the shift direction c from the current position in advance to receive this leading sheet, and in step P42, the shift flag relating to the shift operation is set to 1 and the flow returns to the return.

  When the paper transport control in FIG. 27 is completed, the paper size is checked in step P22 shown in FIG. 25. If the paper size is smaller than the predetermined size, the process proceeds to step P23 for the one-side movement mode for the aligning member. If larger than the predetermined value, the process proceeds to Step P24 according to the both-side movement mode.

The jogging control according to the one-side movement mode will be described with reference to FIG. In addition, the specific example of this one side movement mode was demonstrated in FIG. 19 thru | or FIG.
If it is determined in step P50 that the jogging flag is 1 in step P42, the process proceeds to step P51. In Step P51, the process proceeds to Step P52 after a lapse of time C from the reset of the jogging timer in Step P43 to the start of time measurement by the jogging timer until loading on the tray 12.

  If the pre-tray flag is 0 in step P52, the tray 12 is shifted to the rear side as shown in FIGS. 4 and 5. In step P53, a pulse is sent to the stepping motor 104a to drive the alignment member 102a. When the stepping motor 104b is excited without sending a pulse, the aligning member 102b is immobilized to perform a stopper function in the aligning operation.

  If the pre-tray flag is 1 in step P52, the process proceeds to step P54. Conversely, the pulse is sent to the stepping motor 104b and driven to move the aligning member 102b from the receiving position shown in FIG. 11 to the aligning position shown in FIG. . At this time, the stepping motor 104a is excited without sending a pulse, so that the aligning member 102a in contact with the aligned paper is immovable, and the stopper function in the aligning operation is performed.

  Here, during the aligning operation, one aligning member does not move, performs a stopper function, and the other aligning member moves so as to contact the end surface of the paper, so that the aligning operation of the already aligned paper is not disturbed. Can be performed. Further, the aligning operation can be executed by switching the brake functions of the two stepping motors by a simple method of current control.

  When the moving side aligning member moves to the aligning position shown in FIG. 9, it returns to the receiving position shown in FIG. 8 again, and the aligning operation ends. If it is determined in step P55 that the alignment operation is finished, the jogging flag is reset in step P56 and the process returns to the return. In the control of FIG. 29, the jogging operation of step P24 or step P23 is repeated every time the paper is discharged until the number of copies of the paper is discharged.

The jogging control in the both-side moving mode will be described with reference to FIG. A specific example of this both-side movement mode has been described with reference to FIG.
If it is determined in step P60 that the jogging flag is 1 in step P42, the process proceeds to step P61. In step P61, as in step 50, the process proceeds to step P62 after a lapse of time C from the jogging timer reset in step P43 to the time when the jogging timer starts counting and loading on the tray 12.

  In step P62, a pulse is sent to the stepping motors 104a and 104b to drive both to move the aligning members 102a and 102b and perform the aligning operation. When the pair of aligning members returns from the aligning position shown in FIG. 9 to the receiving position shown in FIG. 8, the aligning operation is terminated. If it is determined in step P63 that the alignment operation is finished, the jogging flag is reset in step P64 and the process returns to the return. In the control of FIG. 30, the jogging operation in step P62 is repeated every time the paper is discharged until the number of sheets is discharged.

  In the control of FIG. 28, when it is determined in step P38 that the sheet accompanied by the shift command signal has passed, this sheet is the first sheet of the copy, so that the tray 12 is loaded before the sheet is stacked on the tray 12. In order to perform sorting by shifting, the tray is shifted to the side opposite to the current position in the shift direction c. For this reason, in FIG. 28, the shift flag is set to 1 in step P42, and the process returns to the return. Then, the tray is shifted by the shift control 25 in FIG. At the time of this shift, there are sheets already stacked on the tray 12, and if the sheet is shifted as it is, it interferes with the lower end portions of the alignment members 102a and 102b and disturbs the alignment state.

In order to avoid this, <1> a method of moving the aligning members 102a and 102b, <2> a method of moving the tray 12, and <3> a method of moving the aligning members 102a and 102b and moving the tray 12 There are three.
a. <1> An example of control by a method of moving the alignment members 102a and 102b will be described.
In FIG. 31, when the shift flag is 1 in step P70 (step P42 in FIG. 28), the solenoid 115 (FIG. 15) is turned on in step P71. Thereby, the alignment members 102a and 102b are retracted to the retracted position shown in FIG. However, since it takes time to move to the retreat position shown in FIG. 16, it is necessary to shift after waiting for this time. For this reason, in step P72, the solenoid

  In Steps P75 and P76, the home sensor 48 is turned on after being turned off by the rotation of the motor 44 shown in FIG. 4, so that the tray 12 is moved from the rear side corresponding to FIG. 5 to the front side corresponding to FIG. Shifting from the front side corresponding to FIG. 6 to the rear side corresponding to FIG.

After the shift, the motor is turned off at step P77, and the pre-tray flag is changed from 0 to 1 or 1 to 0 at steps P78 to P80, so that the non-moving side and the moving side of the alignment member are changed to step P52 in FIG. In addition, the solenoid 115 (FIG. 15) is turned off in step P81 after switching in step P54. Thereby, the aligning member becomes the aligning operation position shown in FIG. In order to cause the alignment operation to be performed for the next sheet having no shift command, the shift flag is set to 0 in step P82 and the process returns.
b. <2> An example of control by the method of moving the tray 12 will be described.
In FIG. 32, when the shift flag is 1 in step P90, the vertical motor 71 is driven in step P91 to lower the tray 12. In order to stop at a predetermined lowering amount, the tray lowering timer is reset in step P92 to start timing, and in step P93, the elapse of time E corresponding to the predetermined lowering amount is waited, and then the motor 44 is stopped in step P94.

  In steps P94 to P97 corresponding to steps P74 to P76 in FIG. 31, the tray 12 is shifted to the opposite side, and the pre-tray flag is replaced from 0 to 1 or 1 to 0 in steps P97 to P100. 29. After the alignment member non-moving side and moving side are switched at step P52 to step P54 in FIG. 29, the upper and lower motors 71 are reversely rotated in the rotating direction at the time of lowering at step P101 and the tray 12 is raised. Let

When the tray 12 reaches the home position detected by the paper surface lever 73 and the paper surface sensor 75 (74) shown in FIG. 2 in step P102, the vertical motor 71 is stopped in step P103, and the vertical position of the tray 12 is determined. . This position is also suitable for the aligning operation in relation to the aligning members 102a and 102b. In step P104, the shift flag is set to 0 and the routine returns.
c. <3> An example of control by a method for moving the alignment members 102a and 102b and moving the tray 12 will be described.
In FIG. 33, since the shift flag is 1 in step P110, the solenoid 115 (FIG. 15) is turned on in step P110. Thereby, the aligning members 102a and 102b are retracted to the retracted position shown in FIG. In step P112, the vertical motor 71 is driven to lower the tray 12.

  In order to stop at a predetermined lowering amount, the tray lowering timer is reset at step P113 to start timing, and at step P114, the motor 44 is stopped after a lapse of time F corresponding to the predetermined lowering amount.

  Since the time F is a case where the aligning members 102a and 102b are retracted and the tray 12 is lowered, the appropriate amount of lowering of the tray 12 can be reduced unlike the above b, so the set time E in step P93. Is not necessarily the same.

  The processes from Step P115 to Step P121 are performed in accordance with Step P74 to Step P80 in the flow of FIG. 31, and the tray 12 is shifted and the setting of the pre-tray flag is changed.

  After shifting the tray 12, the solenoid 122 is turned off in step P122, and the alignment members 102a and 102b are in the alignment operation position shown in FIG. The processes from Step P123 to Step P126 are performed in accordance with Step P101 to Step P104 in the flow of FIG. 32, and the shift flag is set to 0 after the tray 12 is positioned at the tray home position suitable for the alignment operation with the paper discharge. Return to return.

[2] -2-2: Alignment Procedure Based on Both-side Movement Mode By turning on the main switch that controls the image forming apparatus 50 and the sheet-like medium post-processing apparatus 51 in FIG. 1, the initial routine shown in FIG. 34 is executed. Is done. In this initial routine, a “tray shift position check” subroutine is executed in step P131.

  The contents of the “tray shift position check subroutine” in step P131 are shown in FIG. 35, when the process from step P132 to step P140 is compared with the process from step P2 to step P11 in FIG. 25, FIG. 35 is the same except that step P9 in FIG. The state is shifted to the rear side in FIG.

  FIG. 35 does not include step P9 in FIG. 25. In the double-sided movement mode, the alignment member 102a and 102b move together, and therefore the alignment member corresponds to the position of the tray 12 in the shift direction in the alignment operation. This is because it is not necessary to associate one of 102a and 102b with the non-moving side and the other with the moving side, and there is no need to reset the shift counter for measuring the shift counter related to the control. For the same reason, the process omits steps P12 to P14 in FIG.

  After the tray 12 is shifted, the motor 44 is stopped in Step P140, and in Step P141, the solenoid 115 is turned off to bring the aligning members 102a and 102b to the aligning operation position in FIG.

  When the initial routine shown in FIG. 34 ends, the main routine shown in FIG. 36 is always executed. In FIG. 36, the main routine mainly includes a subroutine for movement control by alignment member size in step P150 for moving the alignment members 102a and 102b to a predetermined receiving position in accordance with the sheet size, and the sheet in step P151 for controlling sheet conveyance. This includes a conveyance control subroutine, a jogging control subroutine in step P152 related to the both-side movement mode, a shift control subroutine in step P153 to avoid interference between the sheet S on the tray 12 and the alignment members 102a and 102b. Here, the subroutine of step P153 can be executed by arbitrarily selecting any one of the routines of the shift control shown in FIGS. 38, 39, and 40.

  Since the movement control for each alignment member size in step P150 is exactly the same as the process described with reference to FIG. Further, the paper conveyance control according to step P151 is exactly the same as the process described with reference to FIG.

  With reference to FIG. 37, the jogging control related to the both-side alignment operation will be described. If it is determined in step P180 that the jogging flag is 1 in step P40 in FIG. 28, the process proceeds to step P181. In step P181, the process proceeds to step P182 after waiting for the elapse of time C from the jog timer reset in step P41 in FIG.

In Step P182, a pulse is sent to the stepping motors 104a and 104b to drive them so that both the aligning members 102a and 102b are moved simultaneously to perform the aligning operation.
If it is determined in step P183 that the alignment operation has been completed, the jogging flag is reset in step P184 and the process returns to return. In the control of FIG. 37, the aligning operation of step P182 is repeated each time the paper is discharged until the number of copies is discharged. A specific example of this operation has been described with reference to FIG.

  In the control of FIG. 28 corresponding to the paper conveyance control according to step P151 (not shown), if it is determined in step P38 that the paper accompanied by the shift command signal is passed, this paper is the leading paper of the copy. Since the tray 12 is shifted and sorted until the tray 12 is loaded on the tray 12, the tray is shifted to the side opposite to the current position in the shift direction c. For this reason, in FIG. 28, the shift flag is set to 1 in step P42, and the process returns to the return. Then, the tray is shifted by the shift control 153 in FIG. At the time of this shift, there are sheets already stacked on the tray 12, and if the sheet is shifted as it is, it interferes with the lower end portions of the alignment members 102a and 102b and disturbs the alignment state.

  In order to avoid this, <1> a method of moving the aligning members 102a and 102b, <2> a method of moving the tray 12, and <3> a method of moving the aligning members 102a and 102b and moving the tray 12 There are three.

  A. <1> A control example of a method for moving the alignment members 102a and 102b will be described with reference to FIG.

  In FIG. 38, the processes from Step P190 to Step P194 from when the aligning members 102a and 102b are retracted to when the shifting motor 44 is turned on are performed in accordance with the processes from Step P70 to Step P74 in FIG. When the end of the shift is detected in step P195 based on the detection result of the home sensor 48, the motor 44 is turned off in step P196, the solenoid 115 is turned off in step P197, and the aligning members 102a and 102b are brought to the aligning operation position shown in FIG. In step P198, the shift flag is set to 0 and the process returns to return.

  B. <2> A control example by the method of moving the tray 12 will be described with reference to FIG.

  In FIG. 39, the process from step P200 to step P204 in which the tray 12 is lowered after the tray 12 is lowered corresponds to the process from step P90 to step P94 in FIG. When the end of the shift is detected in step P205 based on the detection result of the home sensor 48, the motor 44 is stopped in step P206, and the vertical motor 71 is reversed in step P207 to raise the tray 12. The subsequent processes from Step P208 to Step P210 are the same as the processes from Step P102 to Step P104 in FIG.

  C. <3> An example of control by the method of moving the aligning members 102a and 102b and moving the tray 12 will be described with reference to FIG.

  In FIG. 40, the process from Step P211 to Step P216 in which the tray 12 is lowered and the alignment members 102a and 102b are retracted to the retracted position and then the tray 12 is driven to shift is performed from Step P110 to Step P115 in FIG. Follow the process.

  When it is determined in step P217 that the shift of the tray 12 has been completed based on the detection result of the home sensor 48, the motor 44 is stopped in step P218, the solenoid 115 is turned off in step P219, and the alignment members 102a and 102b are aligned. In step P220, the vertical motor 71 is reversed to raise the tray 12.

  The subsequent processes from Step P221 to Step P223 are the same as the processes from Step P124 to Step P126 in FIG.

[2] -2-3: Alignment procedure based only on one-side movement mode The order of alignment based on only one-side movement mode is the same as that in the procedure according to the above-mentioned “alignment procedure for switching between one-side movement mode and both-side movement mode according to paper size”. In the flow of 26, the process proceeds to step P23 regardless of the paper size in step P22, and the process can be executed by eliminating the steps P22 and P24 and eliminating the procedure of FIG.

[3] Example Corresponding to Case 5 This example relates to an image forming apparatus having an image forming unit for forming an image on a sheet and a conveying unit for conveying the image-formed sheet. The image forming apparatus shown in FIG. Reference numeral 50 ′ includes an image forming unit common to the image forming apparatus 50 in FIG. The image forming apparatus 50 ′ includes a sheet processing apparatus according to the configuration described in [Case 1] with reference to FIGS.

FIG. 41 shows main members of the image forming means and the sheet processing apparatus (sheet-like medium processing apparatus). Since the sheet processing apparatus constituting the contents of the image forming apparatus has the same configuration as the sheet processing apparatus described with reference to FIGS. 1 to 39, the members functionally the same as those members are not complicated. Therefore, in FIG. 41, the same reference numerals as those in FIGS. 1 to 17 are given. They sheet discharge roller 3, the pedestal 8, asked roller 7 2, the tray 12, the paper lever 7 3, the frame 90, the sheet discharge sensor 38, the paper sensor 74 and 75, aligning member 102a, is 102b or the like.

  The image forming apparatus 50 ′ will be described with reference to FIG. An image forming unit 135 is disposed substantially at the center of the apparatus main body, and a paper feeding unit 136 is disposed immediately below the image forming unit 135. A paper feed unit 136 is provided with a paper feed cassette 210.

  A document reading device (not shown) for reading a document can be provided on the upper portion of the image forming apparatus 50 ′ as necessary. The upper part of the image forming unit 135 is provided with a roller RR, a guide plate, and the like as a conveying unit that conveys an image-formed sheet.

  The image forming unit 135 is provided with an electrical unit Q that electrically drives and controls the apparatus. A drum-shaped photoconductor 500 is also arranged. Around the photosensitive member 500, a charging device 600 for charging the surface of the photosensitive member 500, an exposure device 700 for irradiating the photosensitive member surface with laser light with image information, and a surface of the photosensitive member 500 are exposed. A developing device 800 that visualizes the electrostatic latent image, a transfer device 900 that transfers the toner image visualized on the photoconductor 500 to a sheet, a cleaning device 1000 that removes and collects toner remaining on the surface of the photoconductor after transfer, and the like. Has been placed.

  The photoreceptor 500, the charging device 600, the exposure device 700, the developing device 800, the transfer device 900, the cleaning device 1000, and the like constitute the main part of the image forming unit. A fixing device 140 is disposed substantially above the photoconductor 500 and downstream of the photoconductor 500 on the paper conveyance path.

  When the image forming apparatus functions as a printer, an image signal is input during image formation. In advance, the photoreceptor 500 is uniformly charged by the charging device 600 in the dark. The uniformly charged photosensitive member 500 is irradiated with exposure light from the laser diode LD (not shown) of the exposure apparatus 700 based on the image signal, and reaches the photosensitive member through a known polygon mirror or lens. An electrostatic latent image is formed on the surface of the photoreceptor 500. The electrostatic latent image moves with the rotation of the photosensitive member 500, is visualized by the developing device 800, and further moves toward the transfer device 900.

  On the other hand, unused paper is stored in the paper feed cassette 210 of the paper feed unit 136, so that the uppermost paper S on the bottom plate 220 that is rotatably supported is pressed against the paper feed roller 230. The bottom plate 220 is pressurized by a spring 240. At the time of paper feeding for transfer, the paper feeding roller 230 rotates. By this rotation, the paper S is sent out from the paper feeding cassette 210 and conveyed to the pair of registration rollers 1400.

The paper sent to the registration roller 1400 is temporarily stopped here. The registration roller 1400 takes the timing so that the positional relationship between the toner image on the surface of the photoreceptor 500 and the leading edge of the sheet S is a predetermined position suitable for image transfer at the transfer position where the transfer device 900 is provided. Start transporting.

  The toner image is fixed on the sheet after the transfer passes through the fixing device 140. The sheet that has passed through the fixing device 140 is conveyed by a roller RR that is a conveying unit, and is discharged from the sheet discharge roller 3 to the tray 12 via the sheet discharge sensor 38.

  Subsequent sheet alignment functions performed by the sheet processing apparatus are the same as those described in [Case 1], and thus description thereof is omitted.

Oite the image forming apparatus of the present embodiment also, already because of performing the operation aligned by members aligned relative to the stacked sheets S on the tray, it is possible to align the sheet-like medium with high accuracy.

[4] Example Corresponding to Case 6 This example relates to an image forming post-processing apparatus comprising a combination of an image forming apparatus and a post-processing apparatus. The image forming apparatus 50 ′ shown in FIG. 72 , the tray 12, the paper surface lever 13, the frame 90, the paper discharge sensor 38, the paper surface sensors 74 and 75, the configuration excluding the main components related to the paper processing device, such as the alignment members 102 a and 102 b, and the like shown in FIG. pedestal 8 from the processor 51, asked roller 72, the tray 12, the paper lever 7 3, the frame 90, the sheet discharge sensor 38, the paper sensor 74 and 75, alignment members 102a, except for the main structure of the sheet processing apparatus 102b such as The configuration is a combination of a sheet-like medium processing device configured as a single device. These constitute one apparatus as a whole and are referred to as an image forming post-processing apparatus.

Specifically, "and the image forming apparatus 50" 4 1 image forming apparatus 50 'from the image forming apparatus of the configuration excluding the main member of the sheet processing apparatus 50 shown in as shown in FIG. 42 from And a post-processing device 51 ′ that is arranged downstream of the paper transport direction V and that is configured by removing the main configuration of the paper processing device from the post-processing device 51 shown in FIG. The apparatus includes a sheet processing apparatus (sheet-like medium processing apparatus) 650 that is an apparatus positioned downstream of 51 ′ in the sheet conveyance direction and configured as a single apparatus.

  Since the internal configuration of the image forming apparatus 50 ″ is the same as that described in FIG. 41, the internal configuration is not shown. The internal configuration of the post-processing device 51 ′ has been described with reference to FIG. Since the contents are common, the internal configuration is not shown.

  Since the sheet processing apparatus 650 configured as an independent apparatus has the same configuration as that of the sheet processing apparatus described with reference to FIGS. 1 to 17, the members functionally the same as those members are complicated. 42, the same reference numerals as those used in FIGS. 1 to 17 are used in FIG. These are the discharge roller 3, the pedestal 8, the shift roller 9, the tray 12, the paper surface lever 13, the frame 90, the alignment members 102a and 102b, and the like. These members are assembled to the frame 90 to constitute a sheet processing apparatus 650.

  In FIG. 42, the sheet sent from the image forming apparatus 50 ″ by the conveying unit reaches the post-processing apparatus 51 ′, and is subjected to the post-processing or not being post-processed by the selection here, and the next sheet is processed by the conveying unit. The sheet is fed to the processing device 650. In the paper processing device 650, sorting is performed by the operation of the tray 12, and the sheets are neatly aligned by the alignment operation of the alignment members 102a and 102b.

  In the above description, when the both-side movement mode is adopted for the aligning members 102a and 102b, the aligning member moving means for moving the aligning members 102a and 102b in the shift direction is shown by a rack and a pinion as shown in FIG. A mechanism can be adopted, and the configuration can be simplified as compared with the example in [1] -2-2d using the stepping motors 104a and 104b and the timing belts 106a and 106b.

In FIG. 43, the upper part of the aligning member 102a is pivotally attached to the rack 150a by a shaft 108a '. This axis 108a 'corresponds to the axis 108 in FIG. The aligning member 102a can rotate in a slit 150a1 formed in the rack 150a, and the pushing surface 102a4 comes into contact with the shaft 110a ′ corresponding to the shaft 110 shown in FIG. This prevents rotation. However, the shaft 110a ′ is different from the shaft 110 in FIG. 15 in that the shaft 110a ′ itself does not move up and down. It is fixed to the rack 150a. The positional relationship between the shaft 108a ′ and the shaft 110a ′ is in accordance with the relationship between the shaft 108 and the shaft 110 shown by the solid line in FIG. 14, and is aligned on the opposite side of the pushing surface 102a4 with the shaft 110a ′ as the center. Since the lower end of the member 102a is located, FIG.
5 can be placed in the alignment operation position described in 5.

Similarly, the upper part of the aligning member 102b is pivotally attached to the rack 150b by a shaft 108 '. This axis 108b 'corresponds to the axis 108 in FIG. The aligning member 102b can rotate in the slit 150b1 formed in the rack 150b, and the pushing surface 102b4 comes into contact with the shaft 110b ′ corresponding to the shaft 110 shown in FIG. This prevents rotation. However, the shaft 110b 'is different from the shaft 110 in FIG. 15 in that the shaft 110b' itself does not move up and down. It is fixed to the rack 150b. The positional relationship between the shaft 108b ′ and the shaft 110b ′ is in accordance with the relationship between the shaft 108 and the shaft 110 shown by the solid line in FIG. 14, and is aligned on the opposite side of the pushing surface 102b4 with the shaft 110b ′ as the center. Since the lower end part of the member 102b is located, it can be set in the alignment operation position demonstrated in FIG.

  A pinion 151 is meshed in common between the racks 150a and 150b, and the pinion 151 is rotationally driven by a stepping motor (not shown) that can rotate forward and backward. Further, these racks 150a and 150b are slidably supported by the guide means so that the movement direction is limited in the shift direction c by the guide means (not shown).

  The racks 150a and 150b, the pinion 451, the home position sensor 107c for determining the position of the aligning members 102a and 102b in the shift direction c, the stepping motor, and the like move the aligning members 102a and 102b closer to each other in the shift direction c. It is an example of a reciprocating mechanism that reciprocates in a separating direction, and constitutes an aligning member moving means.

  When a mechanism using a rack and a pinion as shown in FIG. 43 is adopted as the aligning member moving means, the aligning member retracting means is replaced with the configuration described in [1] -2-2f in FIG. As shown, a configuration in which the entire frame 90 'is swung can be employed. Racks 150a and 150b shown in FIG. 43 are mounted on the frame 90 ′.

  44, a shaft 86 extends from the frame 90 ′ in the shift direction c, and both ends of the shaft 86 are pivotally supported by the main body 85, respectively. The main body 85 is, for example, a part of the post-processing device 51 in FIG. The attachment position is the upper position of the paper discharge roller 3. If the aligning members 102a and 102b are supported above the discharge roller 3, the aligning members 102a and 102b can be operated without affecting the vertical movement of the tray 12 or the sheet discharging operation. Can be avoided.

  The frame 90 ′ can swing about the shaft 86 as a fulcrum, and the alignment members 102 a and 102 b also swing together with the frame 90. An arm 87 is fixed to one end side of the shaft 86. A plunger of a solenoid 88 is connected to the free end side of the arm 87 through a wire.

  The free end side of the arm 87 is urged to the side opposite to the solenoid 88 side by a tension spring 91. When the alignment members 102a and 102b are in the alignment operation position indicated by solid lines, the biasing is performed by the stopper 92. The rotation by is prevented.

  Here, as described with reference to FIG. 17, the alignment operation position means that the lower end portion is in the recesses 80 a and 80 b if the sheet S is not on the tray 12, and the alignment member 102 a if the sheet S is on the tray 12. , 102b are positions where the uppermost sheet S comes into contact with its own weight.

  44, the solenoid 88 is fixed to the main body 85. When the solenoid 88 is turned on, the arm 87 is pulled by the plunger and moved to the position of the two-dot chain line, and the frame 90 ′ is also aligned with the alignment members 102a and 102b. Then, as shown by a two-dot chain line in FIG. 44, it moves upward away from the tray 12 and is displaced to the retracted position. Further, when the solenoid 88 is turned off, the arm 87 returns to the aligning operation position indicated by the solid line engaged with the stopper 92. Here, the solenoid 88, the arm 87, the stopper 92, and the like constitute retraction means 120 that displaces the alignment members 102a and 102b so that they can take the alignment operation position and the retraction position.

  As another configuration example using a rack and a pinion, the alignment members 102a and 102b in the examples of FIGS. 10, 12, and 13 are not used instead of swinging the frame 90 ′ as shown in FIG. The racks 150a and 150b with the pinion 151 of FIG. 43 are fixed to the cradles 105a and 105b in the engagement relationship (however, the alignment members 102a and 102b shown in FIG. 43 are not provided on these racks 150a and 150b). Further, by eliminating the timing belts 106a and 106b and the stepping motors 104a and 104b, it is possible to adopt a configuration in which only the alignment members 102a and 102b are swung as described with reference to FIG.

Shi is a schematic diagram of a chromatography preparative shaped medium after-treatment apparatus and the image forming apparatus. FIG. 2A is a perspective view of a main part of the sheet-like medium post-processing apparatus, and FIG. 2B is a schematic perspective view of a peripheral part of a sensor that controls the height of the tray. It is principal part sectional drawing explaining the structure of the tray moving means which moves a tray to a shift direction. Is a perspective view for explaining the driving mechanism portion of the tray. It is a front view explaining a worm wheel and a home sensor. It is a front view explaining a worm wheel and a home sensor. It is the schematic front view which looked at the aligning member and the aligning member moving means from the discharge roller side. It is the schematic front view which looked at the aligning member and the aligning member moving means from the discharge roller side. It is the schematic front view which looked at the aligning member and the aligning member moving means from the discharge roller side. It is the perspective view which showed the principal part of the sheet-like medium processing apparatus. It is a figure explaining the edge in the lower end part of an alignment member. It is the perspective view which showed the principal part of the drive mechanism of the alignment member. It is the perspective view which showed the principal part of the drive mechanism of the alignment member. It is the front view explaining the retracting position and aligning operation position of the aligning member. It is the front view explaining the alignment operation position of the alignment member. It is the front view explaining the retracted position of the alignment member. FIG. 17A is a plan view of the tray, and FIG. 17B is a front view of the tray. FIG. 18A shows a state in which the shift amount is small for the paper with curl, and FIG. 18B shows a state in which the shift amount is large for the paper with curl. FIG. FIGS. 19A, 19B, and 19C are diagrams for sequentially explaining the process of sorting and aligning according to the one-side movement mode. It is the perspective view explaining the movement position of the alignment member in relation to the paper. It is the perspective view explaining the movement position of the alignment member in relation to the paper. It is the perspective view explaining the movement position of the alignment member in relation to the paper. FIGS. 23A, 23 </ b> B, and 23 </ b> C are diagrams for sequentially explaining the sorting and aligning process according to the both-side movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment which switches a one-side movement mode and a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. It is the flowchart explaining the procedure of the sorting alignment only by a both-sides movement mode. 1 is a diagram illustrating an image forming apparatus. It is the figure which illustrated the image formation post-processing apparatus. It is the front view which showed the example of the moving means of the alignment member by a rack and a pinion. It is the perspective view which illustrated the retraction means of the alignment member. It is a perspective view around the tray concerning a prior art.

Explanation of symbols

12 trays 50, 50 ', 50 "image forming apparatus 51, 51', 51" sheet medium post-processing apparatus
80a and 80b concave portions 102a and 102b aligning members 102a1 and 103b1 aligning portions 650 paper processing apparatus (as a sheet-like medium processing apparatus)

Claims (6)

In a sheet medium processing apparatus including a discharge unit that discharges a sheet medium conveyed and a tray on which the sheet medium discharged by the discharge unit is stacked.
The tray is capable of moving the tray by a predetermined amount in a shift direction orthogonal to the sheet-like medium discharge direction of the discharge means in order to sort a bundle of sheet-like medium stacked on the tray for each part .
Alignment means for aligning the sheet-like media stacked on the tray, and the alignment means allows the sheet-like medium discharged from the discharge means and stacked on the tray to be in the form of the sheet parallel to the discharge direction. A pair of aligning members that perform an aligning operation to align the positions of the end faces by moving the aligning section in a direction approaching the two end faces of the medium,
The pair of aligning members are pivotally attached to a fulcrum shaft located above the tray, and the lower end portion of the aligning member is lower than the upper surface of the tray by rotation due to its own weight moment about the fulcrum shaft. A recess is formed on the upper surface of the tray so that the lower end can enter, and the lower end is not in contact with the recess and is positioned in the recess. A rotation preventing member that contacts the upper end of the alignment member in a moving state and prevents rotation of the alignment member;
When there is no sheet-like medium on the tray, the upper end portion of the aligning member serves as a rotation preventing member at a position where the lower end portion of the aligning member rotated by the self-weight moment rotates into the recess. The rotation is prevented by contact,
When a bundle of sheet-like media is stacked on the tray so as to block a part of the concave portion , the pair of sheet-like media is stacked when a bundle of one sheet-like medium is stacked on the tray. The aligning member is prevented from rotating by the rotation preventing member, and the lower end portion of the aligning member is in a position below the lowermost sheet-like medium, and a bundle of a plurality of sheet-like media is placed on the tray. When one of the alignment members is loaded, the rotation of the one alignment member is blocked by the rotation blocking member, and the lower end of the alignment member is positioned below the lowermost sheet-like medium in the uppermost sheet-like medium bundle. there are, the other arranging member by contact with its own weight on the uppermost surface of the bundle of sheet-like medium parts under the lower end of the top of the other arranging member which rotates by the self-weight moment, the other said rotation of the arranging member is prevented Sheet medium processing apparatus according to symptoms. The sheet-like medium processing apparatus according to claim 1, wherein
The sheet-shaped medium processing apparatus, wherein the concave portion has a size that can receive the aligning member when the aligning member performs the aligning operation with respect to a minimum-sized sheet-shaped medium. In the sheet-like medium processing apparatus according to claim 1 or 2,
Tray moving means for performing a sorting operation by moving the tray by a predetermined amount in a shift direction perpendicular to the sheet-like medium discharge direction of the discharge means to sort the sheet-like medium stacked on the tray;
The alignment operation is performed so that the sheet-like media stacked after the sorting operation are aligned at a different position from the sheet-like media stacked before the sorting operation,
The sheet medium processing apparatus according to claim 1, wherein the concave portion is sized to receive the pair of alignment members even when the tray is shifted in the shift direction. In the sheet-like medium processing apparatus according to any one of claims 1 to 3,
When the sheet-like medium is not stacked on the tray, the sheet-like medium is discharged by the discharging unit in a state where a part of the pair of alignment members is positioned below the stacking surface of the tray. A sheet-like medium processing apparatus.   5. The sheet-like medium processing apparatus according to claim 1, further comprising an image forming unit that forms an image on a sheet-like medium and a conveying unit that conveys the image-formed sheet-like medium. An image forming apparatus comprising:   5. A sheet-like medium processing apparatus according to claim 1, further comprising: an image forming unit that forms an image on a sheet-like medium; and an image forming apparatus that includes a conveying unit that conveys the image-formed sheet-like medium. An image forming system characterized in that the two are combined together or separately.

Images