JP3464958B2 - Paper discharge device, collating device using the same, and image forming apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device for stacking sheets to be discharged after being subjected to a predetermined process, a collating device and an image forming apparatus using the sheet discharging device, and more particularly to discharging sheets sequentially discharged. It relates to a sorting and stacking means for sorting and stacking on a paper board.

[0002]

[Prior Art] The present applicant has previously proposed a sheet discharging device capable of sorting and stacking (Japanese Patent Application No. 11-210904, Japanese Patent Application No. 1-210904).
(See each application document of 1-312945). This paper discharge device will be briefly described. As shown in FIGS. 22A and 22B, the paper discharge device is applied to the stacker unit 200 of the collating device, and the stacker unit 200 includes a discharge unit (not shown). ), Which is provided at the position where the collation product 201 discharged from
02 and the collation product 201 to be discharged onto this paper discharge tray 202
And a pair of side fences 203 and 204 which are located on both outer sides and regulate the orthogonal direction of the discharge direction of the collated product 201. At least one of the pair of side fences 203 and 204 is movably provided in the left-right direction, and the width between the pair of side fences 203 and 204 is the same as that of the sheet 2
It is variable according to the width of 01a.

A pair of paper ejection wings 205, 206 are rotatably provided on the pair of side fences 203, 204. The paper ejection wings 205, 206 are located along the side fences 203, 204 and are ejected. The standby position that does not interfere with the collated product 201 discharged from the section and the inward projection with respect to the side fences 203 and 204 interferes with the collated product 201 discharged from the discharge section and causes the collated product 201 to move in the discharge direction. It is configured so that it can be displaced between an interference position that offsets the discharge direction in a substantially orthogonal direction. or,
A section stacking base 210 having an arcuate inclined surface is arranged on the paper discharge base 202.

In the above structure, the collated product 20 from the discharge part
1 is discharged to the stacker unit 200, FIG.
As shown in, the left paper ejection wing 205 shifts from the standby position to the interference position. Then, the left end of the collated product 201 comes into contact with the discharge wing 205 on the left side, the collated product 201 is tilted downward at the right end, and the collated product 201 shifts to the right and falls from the right end first to the collated product. The right end of 201 is placed on the paper output tray 202 with the right side fence 204 in contact with the right side fence 204. Next, when the collation product 201 is discharged from the discharge unit to the stacker unit 200, the right-side discharge wing 206 moves from the standby position to the interference position, as shown in FIG. Then, the right end of the collation product 201 comes into contact with the right paper ejection wing 206, and for the same reason as above, the left end of the collation product 201 abuts on the left side fence 203 and is ejected onto the paper ejection tray 202. Placed. Then, the operation of the left and right paper discharge wings 205 and 206 as described above is performed by the collation product 2.
By being alternately performed in synchronization with the discharge timing of 01, the stacks 201 are offset to the left and right and stacked.

In the above operation process, the paper output wing 20
The collated product 201, which has been interfered with by 5, 206 or the like, has its end surface colliding with the side fences 203, 204 and the paper ejection tray 202, and at that time, due to the reaction force from the side fences 203, 204 and the paper ejection tray 202. May rebound.
Then, the rebound bound product 201 falls on the section stacking base 210 and moves again along the inclined surface in the offset direction. Collection 2 rebounded like this
Since 01 moves along the inclined surface of the bottom 210 for sorting and stacking, the end surface of the collated product 201 is the side fence 203,
The sheet is placed on the paper output tray 202 while being in contact with the sheet 204. From the above, high-quality divisional stacking in which the end faces of the collated product 201 are aligned can be performed.

[0006]

However, in the sheet discharging device of the prior art described above, while the sorting base 210 enables high-quality sorting and stacking, the sorting stack 2 is used.
Since the stacking position of the collated product 201 is raised by the height H of 10, there is a problem that the number of stacked sheets is reduced accordingly.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and it is possible to perform high-quality segmental stacking in which the end faces of sheets are aligned as much as possible, and a sheet discharge device that does not reduce the number of sheets to be stacked. An object of the present invention is to provide a collating device and an image forming device used.

[0008]

According to a first aspect of the present invention, there is provided a paper discharge tray on which the paper discharged from the discharge portion is stacked, and the paper is positioned on both outer sides of the paper discharged on the paper discharge tray. Is provided with a pair of side fences that regulate the direction perpendicular to the discharge direction.
Currently supported and hangs down by its own weight, and the tip side is located downward
And the standby position where the sheet discharged from the discharge section does not interfere with the sheet and the sheet is rotated by the transmission force from the drive source.
The lower surface is pressed by the wing pressing arm, and this pressing force is applied.
And the leading end side moves upward and interferes with the sheet discharged from the discharge section to displace the sheet in a direction substantially orthogonal to the discharge direction and at an interference position that offsets the discharge direction in opposite directions. Provide a pair of paper ejection wings,
A paper ejection device for performing a stacking operation by alternately moving the pair of paper ejection wings from the standby position to the interference position in synchronization with the timing of ejecting the paper from the paper ejection unit, and on the paper ejection table, A central interfering member that interferes with the lower surface of the ejected paper is arranged at substantially the central position of the pair of side fences, and the central interfering member is located above the paper ejection tray and below the paper ejection tray. with movably provided between, the central interference member is freely biased by biasing means in the upper position, lower position of the central interference member, before
It should be located near the paper ejection tray and
The steps are from above the paper output table to above the central interference member.
Paper equivalent to the height of the
If the central interference member is lowered to the lower position,
The paper discharge device is characterized in that the biasing force is set to .

In this paper discharge device, a pair of paper discharge wings are alternately moved from the standby position to the interference position in synchronization with the discharge timing from the discharge unit, and the discharged paper comes into contact with the paper discharge wings and the discharge direction. The paper is offset by being displaced in a direction substantially orthogonal to, and the paper that falls due to the interference with the paper ejection wings may rebound due to the end face colliding with the side fence or the paper ejection tray. However, the rebounded paper tries to move again in the offset direction by being held in the offset posture due to the interference of the central interference member, and when the amount of paper stacked on the central interference member increases, its own weight is increased. As a result, the central interference member gradually moves downward against the urging force of the urging means. In particular, the ejected paper gradually accumulates on the central interference member.
In the process of being posted, in order to carry out high-quality sorting
The position of the central interference member is high until the latest stage
It is desirable to be located at
In order to raise the height only,
It is desirable to be located in a lower lower position on the floor for loading
The amount of paper corresponds to the height from the lower position to the upper position of the central interference member
The center interference member is almost
Since it lowers to the adjacent lower position, a pair of paper is ejected from the paper ejection tray.
Both sides demand while setting the wing height as low as possible
Can be harmonized.

The invention of claim 2 has a plurality of paper feed trays,
A sheet feeding unit that conveys a large number of sheets stacked on each sheet feeding table one by one at a predetermined timing, and a plurality of sheets conveyed from each sheet feeding unit of this sheet feeding unit are gathered to form a collated product. , The collation conveying unit that conveys this collated product to the discharge unit, the ejection unit that ejects the collated product conveyed from this collation conveyance unit to the stacker unit, and the collation product that is ejected from this ejection unit. A pair of side fences are provided, which are provided on both sides of the collated product discharged onto the sheet ejection stand, and which regulate the orthogonal direction of the collated product discharge direction. the fence, its
The upper end of the is rotatably supported and hangs down by its own weight.
Transmission from the drive source and a standby position where the end side is positioned downward and does not interfere with the collated product discharged from the discharge part
The lower surface is pressed against the wing pressing arm that rotates by force.
It is pressed and rotates by this pressing force and the tip side moves upward
The Ding compound interferes with the collated matter discharged from the discharge portion is substantially perpendicular to the direction of the discharge direction, and a pair of sheet discharge to the displacement between the interference position to offset the discharge direction in opposite directions and A stacking device provided with a wing and a stacker section for performing stacking in sections by alternately moving the pair of paper discharge wings from the standby position to the interference position in synchronization with the discharge timing of the collected products from the discharge unit. A central interference member that interferes with the lower surface of the discharged collation is disposed on the paper discharge table and at a substantially central position of the pair of side fences, and the central interference member is used to discharge the paper. with movably provided between a position and than this lower position of the lower upper is an upper platform, and the central interference member freely urged by urging means in the upper position, lower position of said central interference member Is the
The urging means is located near to the paper board.
Is from the top of the paper ejection table to the upper position of the central interference member.
A collated product corresponding to the height is loaded on the central interference member.
If the central interference member is lowered to the lower position,
The collating device is characterized by being set to the urging force of .

In this collating apparatus, the same action as that of the invention of claim 1 can be obtained for the collated product discharged from the discharge section.

According to a third aspect of the present invention, a sheet feeding section for conveying a large number of sheets stacked on a sheet feeding table one by one, and an image forming for forming an image on the sheet conveyed from the sheet feeding table of the sheet feeding section. Department,
An ejecting unit that conveys the paper on which the image is formed by the image forming unit to the ejecting unit and an ejecting stand on which the sheets ejected from the ejecting unit are stacked are provided. A pair of side fences that are located outside and that regulate the direction perpendicular to the paper discharge direction are provided .
The upper end side is rotatably supported and hangs down by its own weight.
Transmission from the drive source and the standby position where the leading edge is in the lower position and does not interfere with the paper ejected from the ejection section
The lower surface is pressed against the wing pressing arm that rotates by force.
It is pressed and rotates by this pressing force and the tip side moves upward
Then , a pair of paper discharge wings is provided that interferes with the paper discharged from the discharge unit and is displaced between the paper and the interference position that offsets the paper in a direction substantially orthogonal to the discharge direction and in a direction opposite to each other. An image forming apparatus comprising: a pair of paper discharge wings, and a paper discharge unit for performing stacking by sorting by alternately moving from a standby position to an interference position in accordance with a timing of discharging paper from the discharge unit, A central interfering member that interferes with the lower surface of the ejected paper is arranged on the paper ejection tray and at a substantially central position of the pair of side fences, and the central interfering member is located above the paper ejection tray. and with movably provided between than this lower position of the lower, urging itself with urging means the central interference member in the upper position side
The standing, the lower position of the central interference member, Ho said delivery table
The biasing means is located close to each other.
Equivalent to the height from the paper table to the upper position of the central interference member
When the paper to be stacked is stacked on the central interference member,
Set the urging force so that the central interference member is lowered to the lower position.
The image forming apparatus is characterized in that

In this image forming apparatus, the same action as that of the first aspect of the invention can be obtained for the image-formed sheet discharged from the discharge section.

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 14 show a first embodiment of the present invention. In the first embodiment, the sheet discharging device of the present invention is applied to a stacker section of a collating device, or the present invention is collated. It is shown as a device. FIG. 1 is an overall perspective view of the collating device, FIG. 2 is a configuration diagram of a paper feeding unit, a discharging unit and a stacker unit, and FIG. 3 is a side view showing a drive transmission system to the paper feeding unit, the collating conveying unit and the discharging unit. 4 is a perspective view showing the distribution of the driving force to each sheet feeding unit.

1 to 4, the collating apparatus is configured such that a collating device conveys a plurality of types of sheets 1 to be collated one by one at a predetermined timing, and a plurality of sheets conveyed from the sheet feeder A. The collation conveying section B for collating the sheet 1 of the above and conveying it as a collation article 2 to the discharging section C, and the discharging section C for discharging the collation article 2 from this collation conveying section B to the stacker section D, Stacker part (sheet ejecting device) for stacking collated products 2 ejected from the ejecting part C
D and.

The paper feed section A has ten paper feed trays 3a to 3j arranged vertically, and each of the paper feed trays 3a to 3j is arranged.
As shown in detail in FIG. 2, the movable paper feed tray portion 6 in which the leading end side of the conveyance moves up and down about the fixed paper feed tray portion 4 and the support shaft 5
It consists of and. A paper presence / absence detection sensor S1 with a lever 7 is provided in the movable paper feeding base section 6, and the paper presence / absence detection sensor S1 detects whether or not the paper 1 is stacked on each of the paper feeding bases 3a to 3j. A paper feed roller 9 supported by a rotary shaft 8 is arranged above the movable paper feed table 6 on the leading edge side of the conveyance. The uppermost sheet 1 stacked when the movable sheet feeding base portion 6 is located above is pressed against the sheet feeding roller 9.

Then, when the paper feed roller 9 is rotated, only the uppermost sheet 1 stacked is conveyed by the synergistic effect of a sheet feeding stand (not shown). An upper guide plate 10 and a lower guide plate 11 for guiding the conveyed sheet 1 are provided at a position downstream of the sheet feeding roller 9 for conveying the conveyed sheet 1. The conveyed sheet 1 has upper and lower guide plates 10, The sheet is guided by 11 and supplied to the collation conveying section B.

The multi-feed detection sensor S2 has a light emitting portion 12 and a light receiving portion 13 which are arranged across the passages of the upper and lower guide plates 10 and 11, and the paper 1 conveyed by the sensor output level is 1 It is detected whether or not it is a sheet. Further, the presence or absence of idling or paper jam is also detected depending on whether or not there is a sensor output within a predetermined time from the start of rotation of the paper feed roller 9.

Further, the rotation timing of the paper feed roller 9 corresponding to each of the paper feed trays 3a to 3j is controlled by an electromagnetic clutch (not shown) which will be described later, and each of the paper feed trays 3a to 3j has a predetermined timing. Then, the sheet 1 is conveyed to the collation conveying section B. The drive transmission system of each paper feed roller 9 and its timing will be described later.

As shown in detail in FIG. 2, the collating / conveying section B includes conveying rollers 15 provided on the discharge sides of the upper and lower guide plates 10 and 11 corresponding to the respective paper feed trays 3a to 3j, and the conveying rollers 15. The pressure roller 16 is provided so as to face each of the transport rollers 15. The pressing rollers 16 arranged in the vertical direction are urged toward the conveying roller 15 by a spring (not shown), and a conveying belt 17 is hung between the pressing rollers 16 so that the pressing rollers 16 are conveyed. Each of them is pressed against the transport roller 15 via the belt 17. The drive transmission system of the transport roller 15 will be described later.

Further, each conveying roller 15 and each pressing roller 1
Vertical guide plates 18 and 19 are provided on both sides of the portion of the conveyor belt 17 which is in pressure contact with 6 and the vertical conveyor path 2 is provided between the vertical guide plates 18 and 19 on both sides.
0 is configured. One vertical guide plate 18 is composed of one plate, while the other vertical guide plate 19 is the upper and lower guide plates 1 of the sheet feeding section A.
It is composed of a plurality of plates integrally with 0 and 11.

When each of the transport rollers 15 rotates,
When the pressing roller 16 receives the frictional force of the conveying roller 15, the rotatable conveying belt 17 is moved, and the sheet 1 conveyed from the sheet feeding unit A is transferred to the rotating conveying roller 15 and the moving conveying belt 17. It is sandwiched between the sheets and is conveyed downward along the vertical conveyance path 20. Here, the sheet 1 on the lower paper feed tray side is conveyed to the collation conveyance section B at the timing when the sheet 1 conveyed from above passes through the lower conveyance roller 15, so that the lower sheet 1 moves upward. The sheet 1 is overlapped and conveyed downward. The conveyance of the sheet 1 and the stacking operation of the sheets 1 are repeated to create a desired collated product 2, and the collated product 2 is further conveyed to the discharge portion C below.

As shown in detail in FIG. 2, the discharge section C has a conveying path changing guide plate 21. The conveying path changing guide plate 21 has a stacker position shown by a solid line in FIG. 2 and a stacker position shown in FIG. It is rotatably provided with respect to the position for the post-processing machine shown by a virtual line. Transport path change guide plate 2
1 is biased toward the stacker position side by a spring (not shown) and is driven by an electromagnetic solenoid (not shown). When the electromagnetic solenoid is off, the stacker is located at the position, and when the electromagnetic solenoid is on, it is located at the post-processor position. At the stacker position, the upper end of the transport path changing guide plate 21 is positioned along one vertical guide plate 18 of the collating transport unit B, and the collated product 2 transported from the collating transport unit B is the stacker unit D. Be guided to the side.
At the position for the post-processing machine, the upper end of the transport path changing guide plate 21 is positioned along the other vertical guide plate 19 of the collating transport unit B, and the collated product 2 transported from the collating transport unit B is stacked. It is guided to the side opposite to the part D side.

A stacker section side guide plate 22 and a post-processing machine side guide plate 23 are provided below the conveying path changing guide plate 21, and the collated product 2 passes over the respective guide plates 22 and 23. It is selectively transported.

The paper discharge detection sensor S3 has a light emitting portion 24 and a light receiving portion 25 which are arranged so as to sandwich the stacker portion side guide plate 22, and detects the discharge timing of the collated product 2 from the sensor output. In other words, when the collation 2 starts to pass,
The light from the light emitting unit 24 is blocked and the output of the light receiving unit 25 is L.
The output level of the light receiving unit 25 returns to the H level and the discharge timing of the collated product 2 is detected. Further, the paper discharge detection sensor S3 detects a paper jam in the discharge section C when the H level of the sensor output continues for a predetermined time or more, for example.

At the most downstream side of the stacker section side guide plate 22 and at a position facing the stacker section D, a pair of discharge rollers 26, 27 arranged vertically are provided. The pair of discharge rollers 26 and 27 are arranged in a substantially pressure contact state, and the upper end portion of the lower discharge roller 27 projects slightly above the stacker section side guide plate 22. The upper discharge roller 26 is on the drive side, and the drive transmission system will be described later. When the upper discharge roller 26 rotates, the lower discharge roller 27 follows the rotation of the upper discharge roller 26, so that the collated product 2 conveyed from the collation conveying section B is a pair of discharge rollers 26, 27. It is inserted in the space and is discharged to the stacker section D by the rotation of the pair of discharge rollers 26 and 27.

Next, the drive transmission system for the paper feed roller 9, the transport roller 15, and the upper discharge roller 26 will be described. As shown in FIG. 3, the output shaft 30a of the main motor 30, the rotation shaft 26a of the discharge roller 26, and the rotation shaft 15a of the lowermost conveyance roller 15 are respectively a drive pulley 31, a discharge pulley 32, and a conveyance pulley 33. Is fixed, these pulleys 3
A first drive belt 35 is hung between 1, 32, 33 and the auxiliary pulley 34.

A relay pulley 37 supported by a rotary shaft 36 is provided between the vertically adjacent paper feed rollers 9, and a transport pulley 33 is fixed to the rotary shaft 15a of each transport roller 15. , The second drive belt 3 between the relay pulley 37, the transport pulley 33, and the auxiliary pulley 38.
It is multiplied by 9. As shown in FIG. 4, a relay gear 40 is fixed to the rotary shaft 36 of the relay pulley 37, and the feed gear 4 arranged at the upper and lower positions is fixed to the relay gear 40.
1 meshes with each other. Each of the paper feed gears 41 has a rotary shaft 8 of the paper feed roller 9 via an electromagnetic clutch (not shown).
Are connected to each.

When the main motor 30 is driven, the first drive belt 35 moves and the upper discharge roller 26 is rotated in the direction of arrow a in FIG. The movement of the first drive belt 35 moves the second drive belt 39 to rotate each of the transport rollers 15 in the direction of arrow b in FIG. 41 is rotated. Then, only the paper feed roller 9 whose electromagnetic clutch (not shown) is turned on is rotated in the direction of arrow c in FIG.

FIG. 5 is a perspective view of the stacker portion, and FIG. 6 is a partial front view thereof. As shown in FIGS. 5 and 6, the stacker unit (paper discharge device) D includes a paper discharge table 42 provided at a position where the collated product 2 discharged from the paper discharge unit C is dropped, and the paper discharge table 42. It has a pair of side fences 43 and 44 which are located on both outer sides of the collated product 2 and are regulated in a direction orthogonal to the ejection direction of the collated product 2. This pair of side fences 4
One of the three (44) (left side in the drawing) is provided so as to be movable in the left-right direction, and the other (right side in the drawing) of the paper discharge tray 42.
It is fixed to. By moving one side fence 43, the width between the pair of side fences 43, 44 can be changed according to the width of the sheet 1 to be collated. Paper output table 42
A front fence 45 that restricts the front of the collation product 2 in the discharge direction is arranged, and the front fence 45 is movably provided in a direction inclined with respect to the discharge direction of the collection product 2. Specifically, when the front fence 45 is moved according to the vertical size of the sheet 1, it is a direction in which the front fence 45 is moved to the center position of the pair of side fences 43 and 44 moved according to the lateral size of the sheet 1.

Further, the stacker section D has a section stacking means 46.
Is equipped with. The sectioning and stacking means 46 has a pair of paper discharge wings 47 and 48 attached in the respective cutout holes 43a and 44a of the pair of side fences 43 and 44, and the pair of paper discharge wings 47 and 48 are at their upper ends. Side is each support shaft 49
It is rotatably supported via. The pair of discharge wings 47, 48 are formed by bending a single flat plate, and a part of the lower end side is tapered so that the width gradually becomes smaller toward the discharge portion side. The pair of paper discharge wings 47 and 48 interfere with the standby position (the position indicated by the phantom line in FIG. 6) that does not interfere with the collected product 2 discharged from the discharge unit C and the collected product 2 discharged from the discharge unit C. It is driven by the drive mechanism 50 so as to be displaced with respect to the interference position (the position indicated by the solid line in FIG. 6).

FIG. 7 is a perspective view of the drive mechanism 50 for the paper discharge wings 47, 48. As shown in FIG. 7, the drive mechanism 50
Has a wing motor 51 as a drive source, and a worm gear 52 is fixed to the output shaft of the wing motor 51. This worm gear 52 has a worm wheel 5
3 meshes with each other, and a first spur gear 54 is integrally fixed to the worm wheel 53 coaxially. A second flat gear 55 meshes with the first flat gear 54, and the second flat gear 55 is fixed to a hexagonal shaft 56. A pair of left and right columnar cams 57 and 58 are respectively inserted into the hexagonal shaft 56, and one columnar cam 57 (left side in the drawing) is movable in the axial direction, but the other (right side in the drawing) columnar cam 58. Is fixed. This is because when one (left side in the drawing) side fence 43 is moved in the left-right direction, the columnar cam 57 also moves together with the one (left side in the drawing) side fence 43 to enable transmission of driving force. Is. Also, since it moves together with the cylindrical cam 57,
The transmission system after the cylindrical cam 57 is all one side (left side in the drawing)
Supported by the side fence 43.

Cam grooves 59 are formed on the outer peripheral surfaces of the pair of cylindrical cams 57 and 58, respectively.
The cam shape of 9 is 18 around the rotation center of the hexagonal shaft 56.
It is set to be 0-degree symmetric. Then, in a 180-degree rotation range from the reference rotation position, one will be described later (on the left side in the drawing).
Of the horizontal link 60 and the vertical link 63 are driven to rotate, and at the rotational position from the rotational position of 180 degrees to the reference rotational position, the other horizontal link 60 (right side in the drawing) described later.
Also, only the vertical link 63 is configured to be rotationally driven.

The pair of horizontal links 60, 60 includes the support shaft 6
A pair of side fences 43 and 44 are rotatably supported by 0a as a fulcrum, and a cam pin 61 engaging with the cam groove 59 is fixed to one end of each side fence. A long hole 62 is formed on the other end side of each horizontal link 60, and a pin 64 of a vertical link 63 is inserted into this long hole 62. The pair of vertical links 63 are rotatably supported by the pair of side fences 43 and 44, and the wing pressing arm 65 and the lower arm plate 66 are fixed to the upper and lower ends thereof, respectively. The pin 64 described above is fixed to the tip of the lower arm plate 66, and the roller 67 is rotatably provided to the tip of the wing pressing arm 65. As shown in FIG. 5, the rollers 67 are arranged close to the back surfaces of the pair of side fences 43 and 44.

Further, as shown in FIG. 5, the pair of side fences 43, 44 has a pair of auxiliary vertical links 90, which are arranged in parallel with the pair of vertical links 63, 63 with a space therebetween.
90 are rotatably provided. One end of an intermediate horizontal arm 91 and an auxiliary arm member 92 extending in the horizontal direction is fixed to each vertical link 63 and each auxiliary vertical link 90, and an engaging pin 93 at the central portion of each intermediate horizontal arm 91 is an auxiliary arm member. It is engaged with a long hole 94 in the middle portion of 92.

That is, when the wing motor 51 rotates, this rotation causes the worm gear 52 and the worm wheel 5 to rotate.
3, the first spur gear 54 and the second spur gear 55 are transmitted in this order to rotate the pair of cylindrical cams 57 and 58 from the reference rotational position. From the reference rotation position to the 180-degree rotation position, as the cam mechanism, only the left cylindrical cam 57 and the cam pin 61 are effective, and the left horizontal link 60 and the vertical link 63 rotate in the direction of arrow M in FIG. The paper wing 47 rotates to the interference position (state of FIG. 13A), and then rotates in the direction of arrow N in FIG.
Returns to the standby position from the interference position due to its own weight. From the 180-degree rotation position to the reference rotation position, as the cam mechanism, only the right cylindrical cam 58 and the cam pin 61 are effective, and the right horizontal link 60 and the vertical link 63 rotate in the direction of arrow N in FIG. The paper wing 48 rotates to the interference position (state of FIG. 13 (B)), and thereafter, the arrow M of FIG.
The right-hand delivery wing 48 returns to the standby position from the interference position due to its own weight by rotating in the direction. In addition, each output wing 47,
The rotation angle θ of 48 (the rotation angle of the interference position with respect to the vertical direction) is about 50 degrees.

Further, the auxiliary arm member 92 moves in the horizontal direction in conjunction with the rotation of the wing pressing arm 65, and when the paper discharge wings 47 and 48 are at the standby position, the auxiliary arm member 92 is discharged from the discharge portion C. Exit position (Fig. 1)
3 (A) and (B) (positions indicated by broken lines), the discharge wings 47, 48 are at the interference position, below the discharge wings 47, 48, and at the discharge wings 47, 4
It is located at a projecting position (position shown by a solid line in FIGS. 13A and 13B) projecting further by R dimension (shown in FIG. 6) further inward than the tip of 8.

In addition to the pair of paper discharge wings 47 and 48 and the drive mechanism 50 for the paper discharge wings 47 and 48, the section stacking means 46 has a central interference member 95. As shown in FIG. 5, FIG. 8 and FIG. 9, the central interference member 95 is provided at the central portion thereof.
It is rotatably supported by the rear wall 96 on the upper part 2 via a support pin 97. One end of the central interference member 95 has a rear wall 9
6 is projected above the paper ejection tray 42 from the hole 96a, and one end side of the central interference member 95 is moved in the hole 96a so that the upper position shown by the solid line in FIG. 9 and the phantom line in FIG. It is rotatably movable between the lower position shown. One end side of the central interference member 95 has a plate shape in which a long hole (in particular, no reference numeral is opened), and is obliquely inclined when viewed from the front side in the upper position, and discharged in the lower position. It is in a state of being substantially close to each other along the table 42 (shown in FIG. 9 and the like). A tension spring 98, which is a biasing means, is hooked between the other end of the central interference member 95 and the rear wall 96, and the central interference member 95 is moved upward by the spring force of the tension spring 98. Being energized. The spring force of the tension spring 98 is received by the end surface of the hole 96a, and is regulated so as not to move upward. The tension force of the tension spring 98 corresponds to the height from the discharge tray 42 to the upper position of the central interference member 95.
The urging force is set to such a degree that the central interference member 95 is lowered to the lower position when the central interference member 95 is loaded on the upper part.

FIG. 10 is a circuit block diagram of the control system of the paper discharge wing, and FIG. 11 is a flow chart of the section stacking mode. In FIG. 10, the output of the paper discharge detection sensor S3 is output to the control unit 68, and the control unit 68 controls the wing motor 51 to execute the flow shown in FIG. 11 in the sorting stacking mode. The details of this control will be described in the section of the operation described later.

Next, the operation of the above configuration will be described with reference to FIGS. FIG. 12 is a timing chart of the sectional stacking mode, FIGS. 13A and 13B are schematic diagrams showing the operations of the initial paper discharge wings 47 and 48 and the central interference member 95 in the sectional stacking mode, respectively, and FIG. , (B) are the paper output wings 47 after the middle period of the divided stacking mode,
FIG. 8 is a schematic view showing the operation of the central interference member and the central interference member.

For example, when 10 sheets of different types (contents) are to be collated, a large number of sheets 1 classified by type from the uppermost sheet feed tray 3a to the lowermost sheet feed tray 3j are collected. The sheets are stacked on the paper feed trays 3a to 3j in the order in which they are combined. When the start switch is selected, the main motor 30 is driven, and the electromagnetic rollers (not shown) are sequentially operated from the paper feed roller 9 of the uppermost paper feed tray 3a to the paper feed roller 9 of the lowermost paper feed tray 3j. ), The sheets 1 of each type (content) are sequentially transported to the collating and transporting section B one by one under the control of (1). The conveyed sheets 1 are conveyed downward while being collated at the conveyance rollers 15 of the collation conveyance section B, and the final collation processing is performed at the lowest position of the conveyance rollers 15 to obtain a desired sheet. Collected item 2 This collation 2 is the discharge part C
The pair of discharge rollers 26 and 27 are advanced by the entrance passage changing guide plate 21 and the stacker side is used as the conveying path.
Is discharged to the stacker portion D by the rotation of the. Then, the series of operations is continuously executed so that one unit of the collated product 2 is sequentially discharged.

Here, in the case of the section stacking mode, the width of the pair of side fences 43 and 44 is made larger (about +35 mm) than the width of the sheet 1 according to the vertical length of the sheets 1 to be collated. The positions of 45 are adjusted respectively.

Then, as shown in FIGS. 11 and 12,
When the timing at which the detection output of the paper discharge detection sensor S3 changes from the L level to the H level is detected (step S1),
The driving of the wing motor 51 is started after the lapse of the predetermined time (t1) (step S2), and the driving of the wing motor 51 is stopped when the cylindrical cam 57 rotates 180 degrees from the reference rotational position (step S3) (step S4). ). Next, when the timing when the detection output of the paper discharge detection sensor changes from the L level to the H level is detected (step S1),
The driving of the wing motor 51 is started after the lapse of the predetermined time (t1) (step S2), and the driving of the wing motor 51 is stopped when the cylindrical cam 57 rotates 180 degrees (step S3). This causes the columnar cam 57 to return to the original reference rotation position. After that, the wing motor 51 is driven each time the timing at which the detection output of the paper discharge detection sensor S3 changes from the L level to the H level is detected.

Here, when the columnar cam 57 rotates 180 degrees from the reference rotation position, as shown in FIGS. 12 and 13A, the left paper ejection wing 47 is displaced from the standby position to the interference position, After holding the interference position for a predetermined time, it returns to the standby position again. Then, when the discharge wing 47 is located at the interference position, the left end of the collated product 2 and the auxiliary discharge wing 47 on the left side coincide with the fall timing of the collated product 2 discharged from the discharge section C. It contacts the arm member 92. Due to this interference, the collated product 2 is in a state where the right end inclines downward, and shifts to the right while falling from the right end first. Therefore, since the right end of the collated product 2 falls while contacting the right side fence 44, the collated product 2 is restricted by the right side fence 44, that is, the right end of the collated product 2 is the right side fence. The fence 44 is placed in contact with the fence 44 and placed on the paper ejection table 42.

Further, when the cylindrical cam 57 rotates from the 180-degree rotation position to the reference rotation position, FIGS. 12 and 13 (B)
As shown in (4), the right paper ejection wing 48 is displaced from the standby position to the interference position, and after holding the interference position for a predetermined time, returns to the standby position again. Then, when the discharge wing 48 is located at the interference position, the right end portion of the collated product 2 is positioned on the right side in accordance with the fall timing of the collated product 2 ejected from the ejection section C. It contacts the arm member 92. Due to this interference, the left end of the collated product 2 inclines downward, and the left end is first dropped while shifting to the left. Therefore, since the left end of the collated product 2 falls while contacting the left side fence 43, the collated product 2 is regulated by the left side fence 43, that is, the collated product 2
The left end of the sheet abuts against the left side fence 43 and
Placed on 2.

Then, such left and right paper discharge wings 4
Since the operations 7 and 48 are performed in synchronization with the discharged collated product 2, each collated product 2 is loaded with a shift amount d offset to the left and right.

In the above operation process, the paper output wing 4
The collated product 2 that has been interfered by 7, 48, etc., has its end surface colliding with the side fences 43, 44 and the paper ejection tray 42, and at that time, due to the reaction force from the side fences 43, 44 and the paper ejection tray 42. May rebound. However, since the rebounded collation product 2 moves again in the offset direction by being held in the tilted posture in the offset direction due to the interference of the central interference member 95, the end face of the collation product 2 hits the side fences 43 and 44. The sheet is placed on the sheet discharge table 42 in a state of being in contact with it. From the above, high-quality divisional stacking in which the end faces of the collated product 2 are aligned can be performed.

Further, the collated product 2 loaded on the paper output table 42
Is also placed on the central interference member 95, as shown in FIG.
As shown in (B), the central interference member 95 gradually moves downward against the spring force of the tension spring 98 due to the weight of the collated object 2 to be placed. Therefore, unlike the prior art, the number of collated products 2 that can be placed on the paper ejection tray 42 does not decrease. Further, the disturbance of the divisional stacking due to the rebound of the collation product 2 is likely to occur in the initial stage of the divisional stacking mode in which the fall distance is long, but in the initial stage of the divisional stacking mode, the central interference member 95 is located at the upper position, Since the central interference member 95 gradually shifts downward in the middle of the stacking mode, it can be said that there is a low possibility that the divided stacking disorder will occur due to the rebound of the collated product 2. From the above, it is possible to perform high-quality segmental stacking in which the end faces of the collated product 2 are aligned as much as possible, and it is possible to prevent a reduction in the number of stacked collated products 2.

In order to carry out high-quality divisional stacking, it is desirable that the position of the central interference member 95 be as high as possible until the later stage. On the other hand, in order to make the load of the collated products 2 as high as possible. It is desirable that the central interference member 95 be located in a lower lower position as early as possible,
In the first embodiment, when the amount of the collated products 2 to be loaded reaches the height corresponding to the height from the lower position to the upper position of the central interference member 95, FIGS. 14 (A) and 14 (B). As shown in
Since the central interference member 95 is lowered to a lower position which is substantially close to the paper ejection tray 42, the heights of the pair of paper ejection wings 47, 48 relative to the paper ejection tray 42 can be set as low as possible while achieving harmony between both requirements. it can.

On the other hand, in the bar stacking mode, the width of the pair of side fences 43 and 44 is slightly larger than the width of the sheets 1 to be collated, and the width of the pair of side fences 43 and 44 is set to the front according to the vertical length of the sheets 1 to be collated. The position of the fence 45 is adjusted respectively.
Since the wing motor 51 is not driven and the pair of paper ejection wings 47 and 48 both hold the standby position,
One unit of the collated product 2 is stacked on the sheet ejection tray 42 without being offset left and right. Here, the collation product 2 ejected from the ejecting section C is placed on the central interference member 95, but the central interference member 95 gradually moves downward due to the weight of the collation product 2, so that the central interference member 95 is interfered with. Bars are stacked in the same manner as there is no object 95.

15 to 21 show a second embodiment of the present invention. In the second embodiment, the paper discharge device of the present invention is applied to a paper discharge unit of a printing apparatus which is an image forming apparatus, or
It is shown that the present invention is a printing apparatus which is an image forming apparatus. FIG. 15 is a schematic configuration diagram of a digital stencil printing machine.

In FIG. 15, the digital stencil printing apparatus includes a document reading section 101, a plate making section 102, a printing section 103 which is an image forming section, a sheet feeding section 104, and an ejecting section 10.
5, a paper discharge unit (paper discharge device) E, and a plate discharge unit 106.

The document reading unit 101 has an automatic document feeding and reading unit 107 and a document placing and reading unit 108. The automatic document feeding / reading unit 107 includes a document slanting plate 109 having an oblique slant for mounting a document, a pair of fences (not shown) for restricting both sides of the document mounted on the document slanting plate 109, and a document slanting plate. A document transport unit (not shown) that continuously transports a plurality of documents placed on 109, a document sensor S2 (shown in FIG. 17) that detects the transported documents, and the content of the transported documents is electrically converted. Line image sensor 11 that converts into a signal and reads
1 and 1. This line image sensor 1
Reference numeral 11 also serves as that of the original placing and reading unit 108.

The original placing / reading unit 108 includes a horizontal original placing glass table 112 on which an original is placed, a pressure plate 113 provided on the original placing glass table 112 so as to be openable and closable, and an original placing glass table. A guide belt 115, which is disposed below 112 and is moved by the driving force of the lead pulse motor 114.
And the line image sensor 11 which moves below the original placing glass table 112 by the guide of the guide belt 115.
1 and.

The line image sensor 111 is located at the right end in FIG. 15, and the line image sensor 111 reads the document conveyed by the document conveying unit (not shown). The line image sensor 111 of the document placed on the document placing / reading unit 108 is moved by being guided by the guide belt 115, and the content of the document is read.

The stencil making section 102 contains a stencil sheet accommodating section 117 for accommodating the rolled long stencil sheet 116, and a thermal head 118 arranged downstream of the stencil sheet accommodating section 117 in the transport direction of the stencil sheet 116. This thermal head 1
The light pulse motor 119 is disposed at a position facing each other.
A platen roller 120 which is rotated by the driving force of the platen roller 120 and a pair of original feeding rollers 121 which are arranged downstream of the platen roller 120 and the thermal head 118 in the transport direction of the stencil sheet 116 and which are rotated by the driving force of the write pulse motor 119. , A pair of document feed rollers 121, 121
And the platen roller 120 and the thermal head 118
And a document cutter 123 driven by a cutter driving unit (not shown). Thermal head 11
Reference numeral 8 has a plurality of dot-shaped heating elements arranged in a direction perpendicular to the transport direction of the stencil sheet 116. In this embodiment, since the maximum printing paper is A3, the dot-shaped heating elements are arranged over the range of A3 width. Has been done.

Then, the stencil sheet 116 is conveyed by the rotation of the platen roller 120 and the document feeding roller 121, and the point heating elements of the thermal head 118 selectively generate heat based on the image information read by the line image sensor 111. Thus, the stencil sheet 116 is heat-sensitively perforated to form a stencil sheet, and the downstream side of the stencil sheet 116 having the stencil sheet formed is cut by the stencil sheet cutter 123 to produce a stencil sheet.

The printing unit 103, which is an image forming unit, has an outer peripheral portion formed of an ink permeable member having a porous structure, and has a plate cylinder 125 that rotates in the direction of arrow A in FIG. 15 by the driving force of the main motor 124. A clamp unit 12 provided on the outer peripheral surface of the plate cylinder 125 for clamping the leading end of the platemaking base paper.
6, a document confirmation sensor (not shown) for detecting whether or not the plate making base paper is mounted on the outer periphery of the plate cylinder 125, and the plate cylinder 1
The plate cylinder 125 is detected by detecting 25 detection pieces 127.
A reference position detection sensor 128 for detecting the reference position and a rotary encoder 129 for detecting the rotation of the main motor 124. The rotational position of the plate cylinder 125 can be detected by detecting the output pulse of the rotary encoder 129 based on the detection output of the reference position detection sensor 128.

The printing unit 103 supplies the squeegee roller 130 and the doctor roller 131 disposed inside the plate cylinder 125, and the emulsion ink 132 for stencil printing, which is an ink, between the rollers 130 and 131. The ink bottle 133 and the printing paper 134, which is the paper that is conveyed in synchronization with the rotation of the plate cylinder 125, are transferred to the plate cylinder 125.
And a press roller 135 which presses the plate making base paper.

Then, the front end of the plate-making base paper conveyed from the plate-making part 102 is clamped by the clamp part 126, and in this clamped state, the plate cylinder 125 is rotated and the plate-making base paper is wound around and mounted on the outer peripheral surface of the plate cylinder 125. By pressing the printing paper 134, which is conveyed in synchronization with the rotation of the plate cylinder 125, with the press roller 135 against the plate-making base paper of the plate cylinder 125, ink is transferred from the stencil portion of the plate-making base paper to the printing paper 134 to form an image. Printed.

The paper feeding unit 104 is a printing paper 13 which is a paper.
4 is stacked, a paper feed roller 138 that moves only the uppermost print paper 134 from the paper feed base 137, and the print paper 134 that is moved by the paper feed roller 138. Plate cylinder 125 synchronized with rotation
And the pair of timing rollers 139 and 139 that are conveyed between the press roller 135 and the pair of timing rollers 1.
The sheet sensor S1 detects whether the printing sheet 134 has been conveyed between the sheet 39 and the sheet 139. Paper feed roller 1
38 to the main motor 12 via a paper feed clutch 140.
4 rotations are selectively transmitted.

The discharge section 105 is a sheet stripping claw 105a for stripping the printed printing sheet 134 from the plate cylinder 125.
And the printing paper 1 peeled off by the paper peeling claw 105a
It has a belt conveyor transport mechanism 105b for transporting 34, and discharges the printed printing paper 134 transported by this belt conveyor transport mechanism 105b to the paper discharge section E.

The paper discharge unit E, which is a paper discharge device, includes a paper discharge unit 105.
The printing sheets 134 discharged from the stack are placed in a stacked state, and the detailed configuration will be described later.

The plate discharge unit 106 includes a plate discharge separation claw 106a for peeling the plate-making base paper wound around the plate cylinder 125 from the plate cylinder 125, and a pair of plate discharge rollers for conveying the plate-making base paper peeled by the plate discharge separation claw 106a. 106b,
106b and the pair of plate discharging rollers 106b, 106b
It has a plate discharge box 106c for accommodating the plate making base paper conveyed by.

FIG. 16 is a perspective view of the paper discharge section E. FIG.
In FIG. 1, the paper discharge unit E is located on both sides of the paper discharge tray 42 provided at the drop position of the print paper 134 discharged from the paper discharge unit 105 and the print paper 134 discharged onto the paper discharge tray 42. And a pair of side fences 43 and 44 that regulate the direction orthogonal to the discharge direction of the printing paper 134. The pair of side fences 43 and 44 are provided so as to be movable in the left and right directions, and the width between the pair of side fences 43 and 44 can be changed according to the width of the printing paper 134 by moving the side fences 43 and 44. it can. Paper ejection stand 4
A front fence 45 that restricts the front of the printing paper 134 in the discharging direction is arranged on the second sheet 2. The front fence 45 is movably provided in the substantially discharging direction of the printing paper 134.

Further, the paper discharge section E is provided with a section stacking means 46, and the section stacking means 46 has the same construction as that of the collating apparatus except that both the pair of side fences 43, 44 are movable. Therefore, the description thereof will be omitted to avoid redundant description. That is, the section stacking unit 46 includes the pair of paper discharge wings 47, 48 and the drive mechanism 5 for driving the wings.
0 and a central interference member 95. Parts shown in the drawings are given the same reference numerals for clarification, and in the following description of the operation, the reference numerals of the first embodiment will be used.

FIG. 17 is a circuit block diagram of the control system of the stencil printing machine, and FIG. 18 is a flow chart of the section stacking printing mode. In FIG. 17, the output of the document sensor S2 for detecting the document conveyance of the document reading unit 101 and the output of the operation panel 168 for the user to input a predetermined command are output to the control unit 169. The control unit 169 includes a ROM 170 and an R
The reading of the AM 171 and the like can be controlled, and the ROM 170 stores execution programs such as a plate making mode and a printing mode. The control unit 169 controls the plate making unit drive circuit 172, the printing unit drive circuit 173, and the like to execute a desired operation based on the input information from the operation panel 168. Then, the wing motor drive circuit 174 is controlled to execute the flow shown in FIG.
The details of this control will be described in the section of the operation described later.

Next, the operation of the above configuration will be described. Specifically, when a plurality of manuscripts are continuously printed in the stencil printing machine, the printing paper 134 is printed for each manuscript.
The case of dividing the items will be described with reference to FIGS. 19, 20, and 21. FIG. 19 is a timing chart of the divisional stacking printing mode, FIGS. 20A and 20B are schematic diagrams showing the operations of the paper ejection wings 47 and 48 and the central interference member 95 in the initial stage of the divisional stacking printing mode, respectively. A), (B)
6A and 6B are schematic views respectively showing the operations of the paper discharge wings 47 and 48 and the central interference member 95 after the middle period of the section stacking printing mode.

First, the width of the pair of side fences 43, 44 is adjusted to be larger than the width of the printing paper 134 (about +35 mm). Then, the original is set, and the number of prints is input through the operation panel 168 (step S11). The document sensor S2 detects the first document (first document) to be printed (step S12), and presses the start key (step S1).
3), the driving of the wing motor 51 is started (step S14), and the left paper ejection wing 47 starts moving from the standby position to the interference position. When the predetermined time t1 has elapsed (step S15), the driving of the wing motor 51 is temporarily stopped (step S16), and the paper discharge wing 47 stops at the interference position. At this time, the columnar cam 57 is in a position rotated 90 degrees from the reference rotation position.

Then, in the plate making section 102, a stencil sheet is produced from the stencil sheet 116 based on the read original data (step S17). In the printing unit 103, the platemaking base paper is mounted on the outer periphery of the plate cylinder 125, and printing is performed on the printing paper 134 sequentially fed from the paper feeding unit 104 (step S18). The printing paper 134 that has been printed is ejected by the ejection unit 10.
The sheets are sequentially ejected to the sheet ejection section E via 5.

Here, as shown in FIG. 20A, since the left paper ejection wing 47 is located at the interference position, the left end of the printing paper 134 dropped from the paper ejection unit 105 is located at the left paper ejection wing 47. To contact. Due to this interference, the right end of the printing paper 134 is inclined downward and the right end is dropped while shifting to the right. Therefore, the right end of the printing paper 134 falls while contacting the right side fence 44, so that the printing paper 134 is regulated by the right side fence 44, that is, the right end of the printing paper 134 falls on the right side fence 44. The sheets are brought into contact with each other and placed on the sheet discharge table 42.

When the printing of the predetermined number of sheets is completed (all the printing of the first document is completed) (step S9), the wing motor 5 is started.
The driving of No. 1 is restarted (step S20), and the driving is stopped when the predetermined time t1 has elapsed (step S21,
S22). By this rotation, the left paper ejection wing 47 returns to the standby position. At this time, the cylindrical cam 57 is at a position rotated 180 degrees from the reference rotation position.

Next, when the document sensor S2 detects the second document, the drive of the wing motor 51 is restarted (step S14), and the drive is stopped after a predetermined time t1 has elapsed (steps S15, S16). Due to this rotation, the right paper ejection wing 48 moves from the standby position to the interference position. At this time, the cylindrical cam 58 moves 90 degrees from the 180 degree rotated position.
It is in a rotated position.

Then, in the plate making unit 102, a stencil sheet is produced from the stencil sheet 116 based on the read original data (step S17). In the printing unit 103, the platemaking base paper is mounted on the outer periphery of the plate cylinder 125, and printing is performed on the printing paper 134 sequentially fed from the paper feeding unit 104 (step S18). The printing paper 134 that has been printed is ejected by the ejection unit 10.
The sheets are sequentially ejected to the sheet ejection section E via 5.

Here, as shown in FIG. 20B, since the right paper ejection wing 48 is located at the interference position, the right end portion of the printing paper 134 dropped from the paper ejection unit 105 is the right paper ejection wing 48. To contact. Due to this interference, the left end of the printing paper 134 is inclined downward, and the left end is dropped while shifting to the left. Therefore, the left end of the printing paper 134 falls while contacting the left side fence 43, and thus the printing paper 134 is regulated by the left side fence 43, that is, the left end of the printing paper 134 lies on the left side fence 43. The sheets are brought into contact with each other and placed on the sheet discharge table 42.

Then, such left and right paper discharge wings 4
Since operations 7 and 48 are performed in synchronization with each predetermined number T of print sheets 134 to be ejected, each predetermined number T of print sheets 134 are stacked with a shift amount d offset to the left and right.

In the above operation process, the paper output wing 4
The end surface of the printing paper 134 that has been interfered with by 7, 48, etc. collides with the side fences 43, 44 and the paper ejection tray 42, and at that time, rebound due to the reaction force from the side fences 43, 44 and the paper ejection tray 42. I have something to do. However, the printing paper 134 that has rebounded moves again in the offset direction by being held in the offset posture by the interference of the central interference member 95, and thus the printing paper 134 again.
Is placed on the paper ejection tray 42 in a state where the end surface of the sheet abuts on the side fences 43 and 44. As described above, high-quality divisional stacking in which the end faces of the printing paper 134 are aligned can be performed.

The printing paper 134 stacked on the paper output tray 42 is also mounted on the central interference member 95, as shown in FIG.
As shown in (A) and (B), the central interference member 95 gradually moves downward against the spring force of the tension spring 98 due to the own weight of the printing paper 134 to be placed. Therefore, unlike the conventional example, the number of print sheets 134 that can be placed on the sheet discharge tray 42 does not decrease. Further, the disturbance of the divisional stacking due to the rebound of the printing paper 134 is likely to occur in the initial stage of the divisional stacking mode in which the drop distance is long, but in the initial stage of the divisional stacking mode, the central interference member 95 is located at the upper position, and Since the central interference member 95 gradually shifts downward in the middle of the mode, it can be said that there is a low possibility that the rebound of the printing paper 134 will disturb the divided stacking. From the above, it is possible to perform high-quality divisional stacking in which the end faces of the printing paper 134 are aligned, and it is possible to prevent a decrease in the number of printing papers 134 to be stacked.

In order to carry out high-quality divisional stacking, it is desirable that the position of the central interference member 95 be as high as possible until the later stage. On the other hand, in order to make the stacking amount of the printing paper 134 as high as possible, It is desirable that the interference member 95 be located at a low lower position at the earliest possible stage, but in the second embodiment, the printing paper 13 to be stacked is stacked.
When the amount of 4 reaches a height corresponding to the height from the lower position to the upper position of the central interference member 95, as shown in FIGS. Since the height of the pair of discharge wings 47 and 48 with respect to the discharge tray 42 is set as low as possible, the requirements of both can be harmonized because the height of the pair of discharge wings 47 and 48 relative to the discharge tray 42 is lowered.

On the other hand, in the stacking mode, the width of the pair of side fences 43, 44 is slightly larger than the width of the printing paper 134, and the position of the front fence 45 is set in accordance with the vertical length of the printing paper 134. Adjusted. Then, since the wing motor 51 is not driven and the pair of paper ejection wings 47 and 48 both hold the standby position, the printing papers 134 are stacked on the paper ejection tray 42 without being offset laterally by a predetermined number of sheets. . Here, the printing paper 134 ejected from the ejection unit 105 is placed on the central interference member 95, but the central interference member 95 gradually moves downward due to the weight of the printing paper 134, so that the central interference member 95.
It is stacked in the same way as without.

In the second embodiment, the case where the present invention is applied to the stencil printing apparatus is shown. However, an image forming apparatus for forming an image on a sheet and stacking the image-formed sheet such as a copying apparatus. If so, it is applicable.

In the first and second embodiments, the central interference member 95 is arranged substantially at the central position of the pair of side fences 43 and 44 so as to be immovable in the left and right directions. If possible, it is possible to shift to the optimum left and right position according to the width dimension of the paper 1 and the printing paper 134, which is preferable. Further, the central interference member 95 is provided on the paper ejection table 42.
The configuration is such that it is always placed above the paper,
If it is configured so as to be movable between an interference position above 2 and a non-interference position other than above the discharge tray 42, it will be the interference position in the section stacking mode, but the central interference member 95. In the bar stacking mode where is not necessary, the non-interference position can be set, which is preferable. Further, although the central interference member 95 is configured to be displaced by the rotational movement between the upper position and the lower position, it may be configured to be displaced by the linear movement. Furthermore, the biasing means of the central interference member 95 is
Although the tension spring 98 is used, a spring other than the tension spring 98 may be used, and a spring other than the spring may be used as long as it can bias the central interference member 95.
However, it is easier to set and assemble the biasing force by using a spring.

In the first and second embodiments, the auxiliary arm member 92 located inside the paper discharge wings 47, 48 at the interference position is provided, but the auxiliary arm member 92 is not provided and the auxiliary arm member 92 is similarly divided. Can be stacked. However, when the auxiliary arm member 92 is provided as in the above-described embodiment, the offset amount d for each collated product 2 is maintained while maintaining the stacking height on the paper ejection tray 42.
There is an advantage that can be increased. Further, in the first embodiment, one of the pair of side fences 43 and 44 is configured to be movable and the other is fixed, but both of them may be configured to be movable and used for some reason. When the width of the sheet 1 is specified, both may be fixed. Further, the drive mechanism 50 for the paper discharge wings 47, 48 is configured by using the worm gear 52 and the worm wheel 53, but may be configured by using only the flat gear.

[0091]

As described above, according to the first aspect of the present invention, the paper discharge tray on which the paper discharged from the discharge unit is stacked is provided, and the pair of side fences is provided on the paper discharge tray.
The upper end of this pair of side fences can rotate freely
It is supported and droops by its own weight, and the tip side is located below
State and the standby position where it does not interfere with the paper ejected from the ejection section, and the wheel that rotates by the transmission force from the drive source.
The lower surface is pressed by the pressing arm, and this pressing force
Rotation, the leading end side moves upward , interferes with the paper discharged from the discharge unit, and the paper is almost perpendicular to the discharge direction,
In addition, a pair of paper discharge wings is provided which are displaced between interference positions that offset the discharge direction in mutually opposite directions, and the pair of paper discharge wings are alternately placed in the standby position in accordance with the timing of discharging the paper from the discharge unit. Is a sheet discharging device that performs stacking by moving the sheet to an interfering position from the center of the pair of side fences, and the center interference that interferes with the lower surface of the sheet to be discharged. A member is disposed, the central interference member is movably provided between an upper position above the paper discharge table and a lower position below the same, and the central interference member is urged to the upper position by an urging means. Since it has been urged, the pair of discharge wings are alternately moved from the standby position to the interference position in synchronization with the discharge timing from the discharge portion, and the discharged paper comes into contact with the discharge wings and is substantially orthogonal to the discharge direction. The paper is offset and the paper is offset, and the paper that has been interfered by the paper ejection wing may rebound due to the end face colliding with the side fence or the paper ejection tray. Is attempted to move again in the offset direction by being held in the offset posture by the interference of the central interference member, and when the amount of sheets stacked on the central interference member increases, the central interference member is urged by the biasing means due to its own weight. Since the sheet gradually shifts downwards against the urging force of the sheet, it is possible to perform high-quality segmental stacking in which the end faces of the sheets are aligned, and the number of stacked sheets does not decrease. In particular, the lower position of the central interference member may be
The position is almost close to the table, and the urging means is
Height from the paper output table to the upper position of the central interference member
When the paper equivalent to is stacked on the center interference member,
The center interference member is lowered to the lower position,
Since it is set to force, in addition to the effect of the invention of claim 1,
In the process that the formed sheets are gradually stacked on the central interference member.
Therefore, in order to perform high-quality divisional stacking,
It is better to be at a higher position until the position is as late as possible
On the other hand, on the other hand, it is
The central interference member should be in the lower position as early as possible.
It is desirable to place the paper in the
The height from the lower position to the upper position of the cross member
The lower position where the center interference member is close to the paper
To the output tray,
Aiming to harmonize the requirements of both parties while setting the height as low as possible
You can

According to the second aspect of the present invention, a sheet feeding unit that conveys a large number of sheets stacked on each sheet feeding unit one by one at a predetermined timing, and a plurality of sheets conveyed from each sheet feeding unit of this sheet feeding unit. Collate sheets of paper and transport the collated product to the output unit, the ejection unit that ejects the collated product conveyed from this collation transportation unit to the stacker unit, and the ejection unit the paper discharge tray for stacking collated product to be provided, a pair of side fences in the delivery table on to the pair of side fences, their
The upper end is rotatably supported and hangs down by its own weight
The standby position where the side is positioned downward and does not interfere with the collated product discharged from the discharge section, and the transmission force from the drive source.
The lower surface is pressed by the wing pressing arm that rotates by
Then, the tip side moves upward due to the pressing force and interferes with the collated product discharged from the discharge part, and the collated product is in a direction substantially orthogonal to the discharge direction and in opposite directions. A pair of paper-discharging wings that are displaced between interference positions that offset the discharge direction are provided on the paper, and the pair of paper-discharging wings are alternately arranged from the standby position to the interference position in accordance with the discharge timing of the collated product from the discharge unit. A stacking device including a stacker section for performing stacked stacking by moving the stacks to a bottom surface of the collated product to be discharged on the paper discharge table and at a substantially central position of the pair of side fences. A central interfering member that interferes with the central interfering member is disposed so as to be movable between an upper position above the sheet ejection tray and a lower position below the same, and the central interfering member is located on the upper position side. I urged to the The collated matter discharged from the discharge portion,
The same effect as the invention of claim 1 can be obtained. Especially in the above
The lower position of the center interference member is a position almost close to the paper ejection tray.
At the same time, the urging unit is
The collated object corresponding to the height to the upper position of the central interference member is in front
When loaded on the central interference member, the central interference
Since the urging force was set so that the member would lower to the lower position,
Paper that has been ejected from the output from the output section
Is gradually loaded on the central interference member,
The location of the central interference member is
It is better to be at a higher position until the later stage,
On the other hand, in order to maximize the paper loading capacity, the center
Interfering member is located in the lower lower position as early as possible
It is preferable that the amount of paper loaded is below the center interference member.
When the height reaches the height of the upper position from the position,
Lower to the lower position where the center interference member is close to the output tray
Therefore, the height of the pair of output wings relative to the output tray can be adjusted.
It is possible to harmonize the requirements of both parties while setting it as low as possible.
Wear.

According to the third aspect of the present invention, a sheet feeding section for conveying a large number of sheets stacked on the sheet feeding table one by one, and an image is formed on the sheet conveyed from the sheet feeding section of the sheet feeding section. An image forming unit, an ejecting unit that conveys the paper on which the image is formed by the image forming unit to the ejecting unit, and an ejecting stand on which the sheets ejected from the ejecting unit are stacked are provided. The side fence of this is provided, and the upper side of this side fence
Is rotatably supported, and hangs down by its own weight
The standby position that does not interfere with the paper discharged from the discharge section and the transmission force from the drive source
The lower surface of the rotating wing pressing arm is pressed,
The front end side moves upward due to the pressing force of the sheet and interferes with the sheet discharged from the discharge section to offset the sheet in a direction substantially orthogonal to the discharge direction and in an opposite direction to the discharge position. A pair of paper discharge wings that are displaced between each other are provided, and the pair of paper discharge wings are alternately moved from the standby position to the interference position in synchronization with the discharge timing of the paper from the paper discharge unit to carry out the division stacking. An image forming apparatus including: a central interference member that interferes with a lower surface of a sheet to be ejected, which is disposed on the sheet ejection tray and at a substantially central position of the pair of side fences. Since the member is movably provided between the upper position above the paper discharge table and the lower position below the paper discharge table, and the central interference member is biased to the upper position side by the biasing means, Discharged The paper image has been formed, the same effect as the first aspect can be obtained. Especially, the central drying
The lower position of the cross member should be close to the paper ejection tray.
At the same time, the urging means is arranged so that
The paper corresponding to the height to the upper position of the interference member is the center
When loaded on the interference member, the central interference member is
Since the urging force is set so that it will lower to the lower position,
The image-formed paper that is ejected from the
Paper is gradually stacked on the central interference member.
The position of the central interference member is
Is desired to be in a high position until the stage is as late as possible
On the other hand, in order to maximize the paper loading capacity,
The central interfering member to the lower position as early as possible.
It is preferable to place it on the center interference part
When the height of the material reaches the height from the lower position to the upper position
Point, to the lower position where the central interference member is close to the paper ejection tray
The height of the pair of output wings relative to the output tray
To keep both requirements as low as possible
You can

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[Brief description of drawings]

FIG. 1 is an overall perspective view of a collating device according to a first embodiment of the present invention.

FIG. 2 illustrates the first embodiment of the present invention, and is a configuration diagram of a paper feed unit, a collation conveyance unit, a discharge unit, and a stacker unit.

FIG. 3 is a side view showing the first embodiment of the present invention and showing a drive transmission system to a paper feed unit, a collation conveyance unit, and a discharge unit.

FIG. 4 is a perspective view showing the first embodiment of the present invention and showing driving force distribution to each sheet feeding unit.

FIG. 5 is a perspective view of a stacker unit according to the first embodiment of the present invention.

FIG. 6 is a partial front view of the stacker unit according to the first embodiment of the present invention.

FIG. 7 shows the first embodiment of the present invention and is a perspective view of a drive mechanism of the paper discharge wing.

FIG. 8 is a perspective view of a central interference member according to the first embodiment of the present invention.

FIG. 9 is a partial front view of the stacker unit for explaining the displaced state of the central interference member according to the first embodiment of the present invention.

FIG. 10 shows the first embodiment of the present invention and is a circuit block diagram of a control system of a paper discharge wing.

FIG. 11 shows the first embodiment of the present invention and is a flow chart of a division and stacking mode.

FIG. 12 shows the first embodiment of the present invention and is a timing chart of each part in the divided stacking mode.

FIG. 13 shows a first embodiment of the present invention (A),
FIG. 6B is a schematic front view of the stacker unit for explaining the operations of the initial paper ejection wing and the central interference member in the divided stacking mode.

FIG. 14 shows the first embodiment of the present invention (A),
FIG. 6B is a schematic front view of the stacker unit for explaining the operations of the discharge wing and the center interference member after the middle period of the divided stacking mode.

FIG. 15 is a schematic configuration diagram of a digital stencil printing machine according to the second embodiment of the present invention.

FIG. 16 is a perspective view of a paper output unit according to the second embodiment of the present invention.

FIG. 17 is a circuit block diagram of a control system of the stencil printing machine according to the second embodiment of the present invention.

FIG. 18 is a flow chart of a section stacking print mode according to the second embodiment of the present invention.

FIG. 19 is a timing chart of a sectional printing mode according to the second embodiment of the present invention.

FIG. 20 shows a second embodiment of the present invention (A),
FIG. 6B is a schematic view showing the operations of the paper ejection wing and the center interference member in the initial stage of the division stacking print mode.

FIG. 21 shows a second embodiment of the present invention (A),
(B) is a schematic front view for explaining the operation of the paper discharge wing and the central interference member after the middle period of the divided stacking mode.

FIG. 22 is a schematic front view showing the operation of the discharge wing in the sectional stacking mode, showing the prior art.

[Explanation of symbols]

A paper feed unit B collation transport section C discharge section D Stacker section (paper ejection device) E Paper ejection unit (paper ejection device) 1 sheet 2 gatherings 3a to 3j Paper feed table 42 paper ejection table 43,44 Side fence 46 means for sorting 47,48 Paper output wing 95 Central interference member 98 Extension spring (biasing means) 103 printing unit (image forming unit) 104 paper feeder 105 discharge part 134 Printing paper (paper) 137 paper feed table

Claims (3)

(57) [Claims] 1. A pair of discharge trays for stacking sheets discharged from a discharge section are provided, and a pair of sheets are disposed on both sides of the discharged sheets on the sheet discharge trays and regulate a direction orthogonal to the sheet discharge direction. the side fences provided on the pair of side fences, their
The upper end of the is rotatably supported and hangs down by its own weight.
The standby position where the end side is positioned downward and does not interfere with the paper discharged from the discharge section, and the transmission force from the drive source
The lower surface is pressed by the wing pressing arm that rotates by
The pressing force causes the sheet to rotate and the leading end side to move upward, which interferes with the sheet ejected from the ejecting section and causes the sheet to be ejected in directions substantially orthogonal to the ejecting direction and in mutually opposite directions. A pair of paper discharge wings that are displaced between the offset interference position is provided, and the pair of paper discharge wings are alternately moved from the standby position to the interference position in synchronization with the discharge timing of the paper from the discharge unit. A sheet discharging device for stacking, wherein a central interference member that interferes with a lower surface of discharged sheets is arranged on the sheet discharge table and at a substantially central position of the pair of side fences. together with movably provided between a position and than this lower position below on the a delivery table above, and the central interference member freely urged by urging means in the upper position, the central interference The lower position of the member is Almost close to the Sharing, ABS tray
Position, and the urging means is on the paper ejection table.
Paper equivalent to the height from the central interference member to the upper position
Is loaded on the central interference member, the central
A paper ejection device characterized in that the urging force is set so that the interference member is lowered to the lower position . 2. A paper feed section having a plurality of paper feed trays and carrying a large number of sheets stacked on each of the paper feed trays one by one at a predetermined timing, and from each paper feed tray of the paper feed section. Collected sheets are collected into a collated product, and the collate conveyance unit that conveys this collated product to the ejection unit and the ejection that ejects the collated product conveyed from this collation conveyance unit to the stacker unit Section and a paper ejection tray on which the collated products ejected from this ejecting unit are stacked, are located on both outer sides of the collated products ejected on the paper ejection table, and are perpendicular to the ejection direction of the collated products. a pair of side fences for regulating the provided on the pair of side fences, its upper side is rotated own
Currently supported and hangs down by its own weight, and the tip side is located downward
The standby position that does not interfere with the collated product discharged from the discharge section and the rotation by the transmission force from the drive source
The lower surface is pressed by the wing pressing arm,
An interference position in which the tip end side moves upward due to the force and interferes with the collated product discharged from the discharge section to offset the collated product in directions substantially orthogonal to the discharge direction and in opposite directions. A pair of paper ejection wings that are displaced between the paper ejection wings are provided, and the pair of paper ejection wings are alternately moved from the standby position to the interference position in accordance with the timing of ejecting the collated product from the ejection unit to perform the division stacking. A stacking device including a stacker unit for performing, wherein a central interference member that interferes with a lower surface of the discharged collation is disposed on the paper discharge table and at a substantially central position of the pair of side fences. and, together with the central interference member provided movably between a position and than this lower position below on the a delivery table above, freely urged by urging means in the upper position side the central interference member to, the central interference member The lower position of the
Position, and the urging means is on the paper ejection table.
To the upper position of the central interference member
When an object is stacked on the central interference member,
The collating device is set so that the central interference member is lowered to the lower position . 3. A paper feed section for feeding a large number of sheets stacked on a paper feed tray one by one, an image forming section for forming an image on the paper fed from the paper feed tray of this paper feed section, and this image An ejecting unit that conveys the paper on which images have been formed in the forming unit to the ejecting unit and an ejecting stand on which the sheets ejected from the ejecting unit are stacked are provided. A pair of side fences that are positioned and regulate the direction perpendicular to the paper discharge direction is provided, and the upper end side of the pair of side fences rotates.
It is supported freely and hangs down by its own weight and the tip side is positioned downward.
The printer is placed in the standby position and does not interfere with the paper discharged from the discharge section, and it rotates by the transmission force from the drive source.
The lower surface is pressed by the wing pressing arm,
The sheet is rotated by force, the leading end side moves upward, interferes with the sheet discharged from the discharge section, and the sheet is in a direction substantially orthogonal to the discharge direction, and between the interference position that offsets the discharge direction in opposite directions. A pair of displacing paper discharge wings is provided, and a pair of paper discharge wings are alternately moved from the standby position to the interference position in synchronization with the discharge timing of the paper from the discharge unit, and a paper discharge unit for performing stacking is provided. An image forming apparatus comprising: a central interference member that interferes with a lower surface of a sheet to be ejected, which is disposed on the ejection tray and at a substantially central position of the pair of side fences. wherein with movably provided between a position and than this lower position of the lower paper output table of a top, and the central interference member freely urged by urging means in the upper position, the central interference member The lower position is , Near the output tray
Position, and the urging means is on the paper ejection table.
Paper equivalent to the height from the central interference member to the upper position
Is loaded on the central interference member, the central
An image forming apparatus characterized in that the urging force is set so that the interference member is lowered to a lower position .