JP3670176B2 - Paper discharge device and printing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper discharge device that sequentially discharges papers that have undergone predetermined processing such as printing, and aligns and stacks the discharged papers, and a printing device that uses the paper discharge device.
[Prior art]
FIG. 15 is a perspective view of a conventional paper discharge device. In FIG. 15, a paper 100 that has undergone a predetermined process such as printing is discharged, and a mounting table 101 is provided at a position where the discharged paper 100 falls. A front fence 102 is provided at a front position on the mounting table 101 in the discharge direction, and left and right side fences 103 are provided on both sides in the discharge direction. The front fence 102 is provided to be movable in the discharge direction, and the left and right side fences 103 are provided to be movable in the direction orthogonal to the discharge direction.
[0002]
In the above configuration, the position of the front fence 102 is adjusted according to the length of the discharged paper 100, and the width of the left and right side fences 103 is adjusted according to the width of the discharged paper 100. When the sheets 100 are sequentially discharged, the front end surface of the sheet 100 is regulated by the front fence 102, and the left and right side end faces of the sheet 100 are regulated by the left and right side fences 103, whereby the sheet 100 is aligned. Is to be loaded.
[0003]
[Problems to be solved by the invention]
However, there is an error in the dimensions of the discharged paper 100, and it is necessary to set the width of the left and right side fences 103 in consideration of this error to some extent. Therefore, the width of the left and right side fences 103 is larger than the width of the paper 100. It must be set large. Then, as shown in FIG. 16, there is a problem that the regulation of the direction perpendicular to the discharge direction by the side fence 103 becomes loose and the paper alignment is not stable. If the paper 100 is accurately adjusted to the width of the paper 100, the paper 100 larger than the normal size does not enter the left and right side fences 103, resulting in a paper discharge error.
[0004]
Accordingly, the present invention has been made to solve the above-described problems, and provides a paper discharge device capable of stable paper alignment regardless of a dimensional error of paper to be discharged, and a printing device using the paper discharge device. With the goal.
[0005]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a sheet discharge apparatus having a mounting table on which a predetermined processed sheet is discharged and on which the discharged sheet is dropped and stacked. The paper discharge box body described above has a fence part, a rear fence part which is a rear position, and left and right side fence parts arranged on both sides of the front fence part and the rear fence part. Provided on the pedestal, the inner space viewed from above the discharge box main body is larger than the size of the paper, and is provided on the rear fence portion of the discharge box main body and the inner surface of one of the side fence portions. Provides a paper guide surface that guides the discharged paper toward the corner where the front fence and the other side fence intersect, and the front fence and the other side fence intersect. An air escape hole that extends in the height direction at the corner and reaches the bottom almost at the bottom is formed, and an air escape space is formed between the inner surface of the four fences and the paper that falls on the inner space. The shape of the discharge box main body is such that a force that urges one of the rear corners on the rear side to the side of the side fence portion with respect to the discharge direction of the paper by the air pressure that escapes from the air escape space. It is characterized by comprising.
[0006]
In this paper discharge device, the discharged paper is guided by the paper guide surface and falls due to its own weight while moving toward the corner where the front fence portion and the other side fence portion intersect, but was pushed by the fall of the paper. The air inside the discharge box escapes to the outside through the air escape hole and falls with the front corner of the paper corresponding to this position as the lower side, so it abuts the corner where the front fence and the other side fence meet. The air escape space is formed between the four sides of the fence and the end surface of the paper, and one rear corner of the paper is moved to one side fence by the pressing force of the air that escapes above the air escape space. The paper that falls while being urged toward the front side has a corner portion where the front side corner portion, which is the opposite corner of the rear side corner portion, intersects the front side fence portion and the other side fence portion. Each two points in contact and, one rear corner portion in contact with the point of one side fence unit status, a state that is that is always positioned at a predetermined 3-point becomes falling position.
[0007]
According to a second aspect of the present invention, in the paper discharge device according to the first aspect, the paper guide surface is an inclined surface that gradually inclines downward toward the inside.
[0008]
In this paper discharge device, in addition to the operation of the first aspect of the invention, the discharged paper is gradually discharged in the direction of the corner where the front fence portion and the other side fence portion intersect by sliding on the inclined surface. Be changed.
[0009]
According to a third aspect of the present invention, in the paper discharge device according to the first or second aspect, the shape of the discharge box main body includes a front fence portion provided with the air escape hole when viewed from above, and the other side. It is a parallelogram having a wide angle at the corner where the side fences meet.
[0010]
In this paper discharge device, in addition to the effects of the invention of claim 1 or claim 2, the air escape space formed between the four-side fence portion and the falling paper is formed between the rear fence portion and the other side fence portion. Near the corner and near the corner of the front fence part and one side fence part are the largest, and one rear corner part of the paper is urged toward one side fence part side by the air that escapes upward from this air escape space A pressing force can be applied.
[0011]
According to a fourth aspect of the present invention, in the paper discharge device according to any one of the first to third aspects, the discharge box body is detachably provided at a predetermined position of the mounting table.
[0012]
In addition to the effects of the first to third aspects of the present invention, the paper discharge device can stack sheets using the paper discharge box main body by mounting the paper discharge box main body. It is possible to stack sheets using the mounting table by removing the.
[0013]
According to a fifth aspect of the present invention, in the paper discharge device according to any one of the first to fourth aspects, the paper discharge box main body is disposed at an upper position, and the discharged paper into the paper discharge box main body is disposed. It is characterized in that a lid is provided which can be changed between a drop allowing position for allowing the drop and a fall preventing position for preventing the discharged paper from falling into the discharge box main body.
[0014]
In this paper discharge device, in addition to the effects of the first to fourth aspects of the invention, the paper discharged by placing the lid portion at the drop prevention position falls on the lid portion, and the paper can be easily removed by hand. When the lid portion is positioned at the drop allowable position, the sheets fall into the discharge box main body, and the sheets can be stacked.
[0015]
According to a sixth aspect of the present invention, in the paper discharge device according to any one of the first to fifth aspects, the paper discharge box main body is not provided with a bottom surface fence portion, and an outer box body having a bottom surface portion is provided with the mounting table and the It is provided so as to be freely mounted between the main body and the discharge box body.
[0016]
In this paper discharge device, in addition to the effects of the first to fifth aspects of the invention, the discharge of the paper into the paper discharge box body is completed, and when the paper discharge box main body is removed from the outer box body, the paper is transferred to the outer box body. Since the outer box body is removed from the mounting table, it can be stored and transported with the paper loaded, and the new outer box body is mounted on the mounting table together with the discharge box body to load the next paper. The discharge operation can be performed.
[0017]
A seventh aspect of the invention is characterized in that the paper discharge device according to any one of the first to sixth aspects is used in a paper discharge unit.
[0018]
In this printing apparatus, the same operation as that of the first to fifth aspects of the invention is performed by the paper discharge unit.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
1 to 14 show an embodiment of the present invention, and FIG. 1 is an overall schematic configuration diagram of a stencil printing apparatus.
[0021]
In FIG. 1, the stencil printing apparatus 1 mainly includes a document reading unit (not shown), a plate making unit 3, a printing unit 4, a paper feeding unit 5, a paper discharging unit 6, and a plate discharging unit 7.
[0022]
A document reading unit (not shown) reads the document as an electrical signal. The read information is configured to be processed based on a predetermined command (enlargement, reduction, etc.).
[0023]
The plate making unit 3 includes a base paper storage unit 11 that stores a long stencil base paper 10 wound in a roll shape, and a guide feed roller 9 that is disposed downstream of the base paper storage unit 11 in the conveying direction of the stencil base paper 10. A thermal head 12 which is a writing head disposed downstream of the guide feed roller 9 and a platen roller which is disposed at a position opposed to the thermal head 12 and is rotated by a driving force of a light pulse motor (not shown). 13.
[0024]
The plate making unit 3 includes a pair of base paper feed rollers 14 and 15 disposed between the platen roller 13 and the thermal head 12 and a plate cylinder 16 described below. It is rotated in synchronization with the platen roller 13 by the driving force of a motor (not shown). Further, the plate making unit 3 includes a base paper cutter (not shown) disposed between the pair of base paper feed rollers 14 and 15 and the platen roller 13 and the thermal head 12, and this base paper cutter (not shown). The stencil sheet 10 is cut by the above.
[0025]
The printing unit 4 includes a plate cylinder 16 and a paper cylinder 17 having substantially the same diameter, and the plate cylinder 16 includes a pair of cylindrical flanges (not shown) provided to face each other. A base paper clamp unit 18 is provided on a part of the outer peripheral surface, and the front end of the stencil base paper 10 can be clamped by this base paper clamp unit 18. A flexible screen 19 that forms the peripheral wall of the plate cylinder 16 is stretched on the outer peripheral surface of the flange of the plate cylinder 16 other than the base paper clamp portion 18. The screen 19 forming the peripheral wall of the plate cylinder 16 is configured to allow ink to pass at least in the printing region when a printing pressure is applied. An inner unit 20 is provided inside a screen 19 that forms the peripheral wall of the plate cylinder 16.
[0026]
The inner unit 20 includes a roll support member 40, and the roll support member 40 is rotatably supported by a fixing member (not shown) around a support shaft 41. An intermediate pressing roll 47 is rotatably supported by the roll support member 40. The intermediate pressing roll 47 has a pressing position (a state shown in FIG. 1) for pressing the screen 19 toward the outer peripheral side and a standby position for exiting from the screen 19. Transition between. The roll support member 40 is provided with a doctor roll 51 and a drive rod 52, respectively. The doctor roll 51 is fixed to the roll support member 40 at a position close to the intermediate push roll 47.
[0027]
The drive rod 52 is rotatably supported by the roll support member 40, and ink (not shown) is supplied around the drive rod 52 from an ink supply unit (not shown). The supplied ink is adjusted in the amount of adhesion to the intermediate pressing roll 47 by the gap with the doctor roll 51, and transferred to the inner peripheral surface of the screen 19 through the intermediate pressing roll 47.
[0028]
Further, a paper clamp portion 21 is provided at a predetermined location on the outer peripheral surface of the paper cylinder 17, and the front end of the printing paper 22 that is a paper can be clamped by the paper clamp portion 21.
[0029]
The paper supply unit 5 is disposed downstream of the paper supply base 23 on which the print paper 22 is stacked, the scraper 24 that presses the print paper 22 at the uppermost position from the paper supply base 23, and is mutually connected. The pickup roll 25 and the suction roll 26 are located in a substantially close state, and the guide roll 27 and the timing roll 28 are arranged downstream of the pickup roll 25 and the suction roll 26 and located in a substantially close state.
[0030]
The printing paper 22 moved by the rotation of the scraper 24 is allowed to carry only the uppermost printing paper 22 by the pick-up roll 25 and the baffle roll 26, and the one printing paper 22 allowed to carry is fed to the guide roll 27 and the timing. The paper is conveyed in synchronization with the rotation of the paper cylinder 17 by the rotation of the roll 28.
[0031]
The paper discharge unit 6 serving as a paper discharge device includes an upper regulation guide unit 30 that guides the leading end of the printing paper 22 that has been printed, a paper peeling claw 32 that peels off the printing paper 22 that has not been peeled off from the paper cylinder 17, and an upper part. A paper transport mechanism 33 that transports the print paper 22 guided by the regulation guide unit 30 or peeled off by the paper stripping claws 32, and the print paper 22 transported by the paper transport mechanism 33 are stacked. And a stacker portion 34 to be placed. The stacker unit 34 is provided with a mounting table 53 and a discharge box 55 detachably attached to the mounting table 53. The detailed configuration of the mounting unit 53 and the discharge box 55 will be described below.
[0032]
The plate discharging unit 7 is configured to peel the stencil sheet 10 guided from the stencil guide belt 35 guided by the stencil guide belt 35 and the stencil guide belt 35, which is released from the stencil sheet clamping unit 18 of the plate cylinder 16, from the plate cylinder 16. A pair of discharged plate conveying belts 36 to be conveyed, and a discharged plate box 37 for storing the stencil sheet 10 conveyed by the pair of discharged plate conveying belts 36 are provided.
[0033]
Next, the mounting table 53 and the paper discharge box 55 of the stacker unit 34 will be described. 2 is a perspective view showing a state in which the discharge box 55 is mounted on the mounting table 53, FIG. 3 is a perspective view showing an assembled state of the discharge box 55, FIG. 4 is an exploded perspective view of the discharge box 55, and FIG. 5A is a plan view of the discharge box main body 57, FIG. 5B is a left side view thereof, FIG. 5C is a right side view thereof, FIG. 6A is a front view thereof, and FIG. Is a bottom view thereof, FIG. 7A is a plan view of the lid portion 58, and FIG. 7B is a right side view thereof.
[0034]
As shown in FIGS. 1 and 2, the mounting table 53 has a flat plate shape and is fixed to the apparatus main body. A front fence 54a and left and right side fences 54b are provided on the mounting table 53. The fences 54a and 54b are provided so as to be movable in a standing state and a tilted position shown in FIG. Like the example, it is configured to be slidable in a predetermined direction. The discharge box body 55 is detachably mounted on the mounting table 53 configured in this manner regardless of whether the fences 54a and 54b are erected or tilted.
[0035]
As shown in FIGS. 2 to 4, the paper discharge box 55 includes a paper discharge box main body 56, a lid portion 57 that is rotatably supported above the paper discharge box main body 56, and a paper discharge box main body 56. It is composed of an outer box body 58 that can be mounted so as to cover the outer periphery of the discharge box main body 56 from below.
[0036]
As shown in detail in FIGS. 4 to 6, the discharge box main body 56 is in the installed state on the mounting table 53, and has a front fence portion 60 that is a front position in the discharge direction and a rear fence that is a rear position. A box-like shape having a part 61 and left and right side fence parts 62 and 63 arranged on both sides of the front fence part 60 and the rear fence part 61, and the entire circumference is surrounded by the four fence parts 60 to 63. Make. It should be noted that the bottom surface fence portion is not provided on the bottom surface of the discharge box body 56 and is open.
[0037]
The inner space of the discharge box main body 56 as viewed from above is provided with a margin larger than the size of the printing paper 22 of a predetermined size (postcard size or business card size). A paper guide surface 64 is provided on the inner surface of the rear fence portion 61 and one side fence portion 62 to guide the discharged printing paper 22 in the direction of the corner A where the front fence portion 60 and the other side fence portion 63 intersect. The sheet guide surface 64 is configured as an inclined surface 64a that gradually inclines downward toward the inside.
[0038]
Further, an air escape hole 65 extending in the height direction is provided in the vicinity of the corner A where the front fence portion 60 and the other side fence portion 63 intersect with each other, and the lower portion from the center position reaches the bottom surface.
[0039]
Further, the shape of the discharge box main body 56 is configured as a parallelogram having a wide angle at the corner A where the front fence portion 60 provided with the air escape hole 65 and the other side fence portion 63 intersect when viewed from above. Has been. Specifically, as shown in FIG. 5A, the rear end surface and the front end surface are inclined by θ with respect to the vertical lines L1 and L2 of the side end surfaces, respectively.
[0040]
And since it is the shape of such a parallelogram, when the printing paper 22 falls in the discharge box main body 56, it forms between the four-side fence parts 60-63 and the printing paper 22 which falls. The air escape space S (shown in FIG. 10) is large near the corner where the rear fence 61 and the other side fence 63 intersect, and near the corner where the front fence 60 and one side fence 62 intersect. The front corner that is opposite to the rear corner 22b of the printing paper 22 is formed by pressing one rear corner 22b of the printing paper 22 toward the one side fence 62 and being pressed by the air escaped from the air escape space S. The force which urges | biases the part 22a to the other side surface fence part 63 acts.
[0041]
Positioning projections 66 projecting downward are provided at three locations on the lower surface of the discharge box main body 56. Positioning holes (not shown) are provided at positions corresponding to the mounting table 53. By inserting the positioning protrusion 66 of the discharge box main body 56 into the positioning hole 67 (see FIG. 14) of the mounting table 53, the discharge box 55 is detachably provided at a predetermined position of the mounting table 53.
[0042]
Further, positioning holes 67 are also provided at the positions of the side fences 54 b corresponding to the two positioning holes (not shown) of the mounting table 53. The discharge box body 56 can be mounted not only in the state where the side fence 54b is positioned at the standing position but also in the state where the side fence 54b is positioned in the tilted position as shown in FIG.
[0043]
In addition, a paper drawing guide portion 68 that protrudes rearward from the rear fence portion 61 is provided above the left and right side fence portions 62 and 63, and the left and right paper drawing guide portions 68 are located upstream in the paper discharge direction. As they go, they extend in a direction that gradually increases the width of each other.
[0044]
As shown in detail in FIGS. 4 and 7, the lid portion 57 is a transparent flat plate-like member, and as shown in FIG. 7A, the rear end surface and the front end with respect to the vertical lines L3 and L4 of the side end surfaces. The surface has an inclined parallelogram and is formed so as to correspond to the internal space of the discharge box body 56. Rotation support protrusions 70 are respectively provided on both side surfaces on the front side of the lid portion 57. By engaging the rotation support protrusions 70 on both sides with the rotation groove 71 of the discharge box main body 56, the lid portion 57 is rotatably supported by the discharge box main body 56.
[0045]
In addition, a set of a rotation guide projection 72 and a positioning projection 73 is provided on each side surface on the rear side of the lid portion 57. The rotation guide protrusions 72 on both sides are inserted and guided in the rotation guide grooves 74 of the side fences 62 and 63 on both sides of the discharge box main body 56, whereby the lid portion 57 is allowed to fall as shown in FIG. And a rotation prevention position shown in FIG. 12B. The discharged print paper 22 is allowed to fall into the discharge box main body 56 at the drop allowable position, and the discharged print paper 22 is placed on the lid portion 57 at the drop prevention position, and the print paper 22 is discharged. Dropping into the box body 56 is prevented.
[0046]
12A, the positioning projection 73 is engaged with the upper holes 75 of the side fence portions 62 and 63 on both sides of the discharge box body 56, so that the lid portion 57 is allowed to fall. Held in position. In the fall prevention position shown in FIG. 12 (B), the positioning projection 73 is restricted from shifting downward at the end surfaces of the lower holes 76 of the side fence portions 62 and 63 on both sides of the discharge box main body 56, whereby the lid portion 57 is moved. It is held in the fall prevention position.
[0047]
As shown in detail in FIGS. 3 and 4, the outer box body 58 is erected from a bottom surface portion 77 that is sufficiently larger than the bottom space of the discharge box main body 56 and four side surfaces of the bottom surface portion 77. It is comprised from the surface part 78, and the perimeter is enclosed by these four standing surface parts 78. FIG. In addition, protrusion insertion holes 77 a are formed at three locations on the bottom surface portion 77.
[0048]
When the paper discharge box main body 56 is inserted into the outer box body 58, the paper discharge box main body 56 is covered with the outer box body 58, and the paper discharge box main body 56 is projected from the protrusion insertion hole 77a of the paper discharge box main body 56. The positioning projection 66 protrudes downward and is mounted on the mounting table 53. A predetermined gap through which air escapes is formed between the four fence portions 60 to 63 of the discharge box body 56 and the standing surface portion 78 of the outer box body 58.
[0049]
Next, the operation of the stencil printing apparatus 1 will be briefly described with reference to FIG. In the plate making unit 3, the stencil sheet 10 is conveyed by the rotation of the platen roller 13 and the base paper feed roller 14, and a number of heating elements of the thermal head 12 are selectively selected based on image information read by a document reading unit (not shown). The stencil sheet 10 is heat-sensitive perforated by the heat generation operation, and a stencil sheet 10 having a desired size is made by cutting a stencil sheet 10 for a predetermined length by a stencil cutter (not shown).
[0050]
In the printing unit 4, the front end of the stencil sheet 10 made by the plate making unit 3 is clamped by the stencil sheet clamping unit 18 of the plate cylinder 16, and the plate cylinder 16 is rotated in this clamped state so that the stencil sheet 10 is moved to the plate cylinder 16. It is wound around the outer peripheral surface of the screen 19 and is attached.
[0051]
The paper feeding unit 5 conveys the printing paper 22 in synchronization with the rotation of the plate cylinder 16 and the paper cylinder 17, and the plate cylinder 16 and the paper cylinder are clamped at the leading end of the printing paper 22 by the paper clamping unit 21 of the paper cylinder 17. 17 to convey.
[0052]
On the other hand, in the printing unit 4, the intermediate pressing roll 47 is positioned at the pressing position during printing, and the plate cylinder 16 is rotated. Then, the intermediate pressing roll 47 rotates on the inner peripheral surface of the screen 19 while pressing the inner peripheral side of the screen 19. Since ink is always supplied to the outer peripheral surface of the intermediate pressing roll 47, the ink is transferred to the screen 19 by this rotation. Further, the screen 19 bulges to the outer peripheral side by the pressing of the intermediate pressing roll 47 and comes into pressure contact with the paper cylinder 17.
[0053]
As described above, the printing paper 22 is transported from the paper supply unit 5 between the plate cylinder 16 and the paper cylinder 17, and the transported printing paper 22 is screened between the intermediate pressing roll 47 and the paper cylinder 17. 19 and the stencil sheet 10 are conveyed while being pressed. In this pressing and conveying process, ink is transferred from the perforated portion of the stencil sheet 10 to the printing paper 22 and an image is printed. When the leading edge of the printing paper 22 passes the position of the intermediate pressing roll 47 and reaches the downstream side, the paper clamping unit 21 is released.
[0054]
In the paper discharge unit 6, the leading end side of the printing paper 22 is guided by the upper restriction guide unit 30, or the leading end side of the printing paper 22 is peeled off from the paper cylinder 17 by the paper peeling claw 32, and then the paper transport mechanism 33. Then, the printing paper 22 is discharged to the stacker unit 34.
[0055]
Further, when starting the new plate making, the plate discharging unit 7 needs to discharge the used stencil sheet 10 used for the previous printing wound around the outer peripheral surface of the screen 19 of the plate cylinder 16. In that case, the stencil sheet 18 of the plate cylinder 16 is released before the new pre-made stencil sheet is deposited on the outer peripheral surface of the screen 19 of the plate cylinder 16, and the front end side of the released stencil sheet 10 is released. Is guided by the discharge plate guide belt 35 while rotating the plate cylinder 16, and is conveyed by the pair of discharge plate conveying belts 36 and stored in the discharge plate box 37.
[0056]
Next, a case where the paper discharge box 55 is used for the stacker unit 34 of the paper discharge unit 6 in the above operation will be described. An outer box body 58 is mounted below the discharge box body 55, the outer box body 58 and the discharge box body 55 are brought onto the mounting table 53, and the positioning protrusion 66 of the discharge box body 55 is placed on the mounting table 53. Is inserted into a positioning hole (not shown). Then, as shown in FIG. 2, the paper discharge box 55 is positioned at a predetermined position on the mounting table 53.
[0057]
When the printing paper 22 printed by the printing unit 4 is discharged to the stacker 34, the discharged printing paper 22 is discharged toward the inside of the discharge box main body 56. Here, the discharged printing paper 22 is guided by the left and right paper pull-in guide portions 68 and guided into the paper discharge box body 56 even if the discharge direction is slightly inclined. Further, since the inner space of the discharge box main body 56 is larger than the size of the printing paper 22 of a predetermined size (postcard size or business card size), the printing paper 22 having a size error is provided. Even if it is mixed, it is guided into the discharge box main body 56.
[0058]
The printing paper 22 discharged into the paper discharge box main body 56 comes into contact with the inclined surfaces 64a of the rear surface fence portion 61 and the one side surface fence portion 62, and the printing paper 22 is shown on the printing paper 22 by the inclined surfaces 64a of the rear surface fence portion 61. 8, the biasing force acts on the printing paper 22 in the f2 direction of FIG. 8 by the inclined surface 64a of the one side fence 62, and the printing paper 22 is biased in the resultant force direction (f1 + f2). . As a result, the printing paper 22 falls due to its own weight while changing the discharge direction in the direction of the corner A where the front fence portion 60 and the other side fence portion 63 intersect.
[0059]
When the printing paper 22 is dropped, the air in the paper discharge box main body 56 escapes to the outside through the air escape hole 65. Therefore, as shown in FIGS. 9 and 10, the printing paper 22 has a front corner 22a corresponding to this position. The printing paper 22 is subjected to a biasing force f3 urging in the direction of the corner A where the front fence portion 60 and the other side fence portion intersect, so that the front corner portion 22a of the printing paper 22 faces the front surface. While falling while abutting on the corner A where the fence 60 and the other side fence meet, an air escape space S is formed between the four fences 60 to 63 and the end face of the printing paper 22, and this air The urging forces f4 and f5 such that one rear corner portion 22b of the printing paper 22 is urged toward one side fence portion 62 by the air pressure of the air escaping above the escape space S are respectively provided. While use fall.
[0060]
As shown in FIG. 11, the printing paper 22 that falls while the urging forces f <b> 3, f <b> 4, and f <b> 5 are acting is, as shown in FIG. Positions are always in contact with two points (a1, a2) near A, and one rear corner 22b is in contact with one point (b1) of one side fence 62, that is, at three predetermined points. The state that has been made becomes the drop position. Therefore, stable paper alignment can be achieved regardless of the dimensional error of the discharged printing paper 22.
[0061]
In the above embodiment, since the discharge box main body 56 is detachably provided on the mounting table 53, the loading table 53 is mounted by loading the printing paper 22 using the discharge box main body 56 and removing the discharge box main body 56. It is possible to both stack the used printing paper 22.
[0062]
Further, in the above embodiment, the discharge box main body 56 is provided with the lid portion 57, and the lid portion 57 can be changed to the fall prevention position and the fall allowance position. Therefore, at the time of printing trial printing, as shown in FIG. 12B, the discharged print paper 22 is dropped on the lid portion 57 by positioning the lid portion 57 at the fall prevention position, and this Since the printing paper 22 can be easily picked up, it is very convenient for checking the image position and image density. At the time of the main printing after the printing trial printing, as shown in FIG. 12A, the printing paper 22 falls into the discharge box main body 56 by positioning the lid 57 at the drop allowable position. Stable lamination of the printed paper 22 is possible.
[0063]
Further, in the above embodiment, the paper guide surface 64 is configured as the inclined surface 64a that gradually inclines downward as it goes inward, so that the discharged printing paper 22 slides on the inclined surface 64a, thereby causing the front fence unit 60 to slide. Since it is guided in the direction of the corner A where the other side fence 63 intersects, the discharge direction can be changed smoothly.
[0064]
In the above-described embodiment, the outer box body 58 that is detachable from the discharge box main body 56 is provided. Therefore, when the discharge of the printing paper 22 into the paper discharge box body 56 is completed and the paper discharge box main body 56 is removed from the outer box body 58, the printing paper 22 is stacked on the outer box body 58. If the outer box body 58 loaded with the printing paper 22 is removed from the mounting table 53 and left in this state, the mounting state does not collapse even if an impact is applied from the outside, so that the drying process can be performed stably. It is easy to store and transport afterwards. Further, by mounting the new outer box body 58 together with the discharge box main body 56 on the mounting table 53, it is possible to perform a discharge operation for the next printing, which is convenient for performing a large amount of printing processing.
[0065]
Next, another usage example of the paper discharge box 55 will be described. As shown in FIGS. 13 and 14, only the discharge box main body 56 can be set on the mounting table 53 without using the outer box body 58. Even if set in this way, the printing paper 22 is stacked in the paper discharge box body 56 with a stable paper alignment as described above. When printing is completed, the discharge box body 56 is removed from the mounting table 53. Then, the printing paper 22 is stacked on the mounting table 53 with a stable paper alignment.
[0066]
In the above-described embodiment, the case where the paper discharge device of the present invention is applied to the paper discharge unit 6 of the stencil printing apparatus 1 is shown, but it can be applied to a printing device other than the stencil, and other than the printing device. The present invention can be similarly applied to a paper discharge unit, that is, a paper discharge unit that discharges a sheet on which predetermined image processing or the like has been performed, such as a copying machine, and needs to align and stack the discharged paper.
[0067]
In the above-described embodiment, the paper guide surface 64 is configured as the inclined surface 64a that gradually inclines downward toward the inside. However, the front side fence unit 60 and the other side surface fence unit 63 serve as the discharged printing paper 22. Any structure that guides in the direction of the intersecting corner A may be used.
[0068]
In the above-described embodiment, the shape of the discharge box main body 56 has a wide angle at the corner A where the front fence portion 60 provided with the air escape hole 65 and the other side fence portion 63 intersect when viewed from above. Although configured as a parallelogram, an air escape space S is formed between the four-side fence sections 60 to 63 and the printing paper 22 falling in the discharge box body 56, and printing is performed by air pressure that escapes from the air escape space S. The shape of the discharge box main body 56 may be such that one rear corner portion 22b of the paper 22 is urged toward the one side fence portion 62 side.
[0069]
In the above-described embodiment, the bottom surface of the paper discharge box body 56 is opened. However, the bottom surface may be closed by providing a bottom surface fence portion. In the case of such a configuration, the outer box body 58 becomes unnecessary. However, when the outer box body 58 is provided as in the above-described embodiment, in addition to the above-described advantages, the gap between the discharge box body 56 can be adjusted by changing the size of the outer box body 58, and this By adjusting the gap, it is possible to adjust the amount of air escape from the air escape hole 65 of the discharge box main body 56. That is, the falling speed of the printing paper 22 can be adjusted to an appropriate value, and the falling posture and the landing posture are stabilized.
[0070]
【The invention's effect】
As described above, according to the first aspect of the present invention, the front fence portion that is the front position with respect to the paper discharge direction, the rear fence portion that is the rear position, the left and right sides that are disposed on both sides of the front fence portion and the rear fence portion. The discharge box body surrounded by the four fences is provided on the mounting table, and the inner space viewed from the upper side of the discharge box body has more margin than the size of the paper. A paper guide surface that guides the discharged paper toward the corner where the front fence portion and the other side fence portion cross each other on the rear fence portion of the discharge box body and the inner surface of one of the side fence portions. A four-sided fence is provided with an air escape hole extending in the height direction at the corner where the front fence part and the other side fence part intersect, and the lower part reaching almost the bottom. And an air escape space is formed between the paper and the paper that falls in the inner space, and one rear corner portion of the paper is urged toward one side fence by the air pressure escaped from the air escape space. Since the shape of the paper discharge box main body is configured so as to work, the discharged paper is guided by the paper guide surface and falls due to its own weight while moving toward the corner where the front fence portion and the other side fence portion intersect. However, the air inside the paper discharge box pressed by the fall of the paper escapes to the outside from the air escape hole and falls with the front corner of the paper corresponding to this position as the lower side. While falling in contact with the corner where the fence intersects, an air escape space is formed between at least one of the four fences and the edge of the paper. By the pressing force of air escaping from the escape space above it falls while biasing the side corners after one sheet on one side fence portion.
[0071]
The paper that falls in this way has its front corner near the two corners near the intersection of the front fence and the other side fence, and one rear corner is the other. Since the drop position is a state in which the side fence part is in contact with one point, that is, a state in which it is always positioned at three predetermined points, stable paper alignment can be performed regardless of the dimensional error of the discharged paper.
[0072]
According to the second aspect of the present invention, in the paper discharge device according to the first aspect, the paper guide surface is configured as an inclined surface that gradually inclines downward toward the inner side. In addition, the paper discharge direction is smoothly changed because the paper discharge direction is gradually changed in the corner direction where the front fence part and the other side fence part intersect by sliding the inclined surface. .
[0073]
According to a third aspect of the present invention, in the paper discharge device according to the first or second aspect, the shape of the paper discharge box main body is a front fence portion provided with the air escape holes when viewed from above, and In addition to the effect of the invention of claim 1 or claim 2, it is formed between the four-side fence part and the falling paper, since the angle of the corner part where the other side fence part intersects is wide. The air escape space is the largest near the corners of the rear fence part and the other side fence part, and near the corners of the front fence part and the one side fence part, and the air escapes upward through the air escape space. Since it is possible to apply a pressing force that urges one of the rear corners to the side of the side fence portion, a desired air escape space can be obtained by configuring the shape of the discharge box body to be a parallelogram. It can be formed.
[0074]
According to a fourth aspect of the present invention, in the paper discharge device according to the first to third aspects, the discharge box main body is detachably provided at a predetermined position of the mounting table. In addition to the effect of the third aspect of the invention, it is possible to stack paper using the paper discharge box main body by mounting the paper discharge box main body, and paper using the mounting table by removing the paper discharge box main body. Can be loaded and is convenient.
[0075]
According to a fifth aspect of the present invention, in the paper discharge device according to any one of the first to fourth aspects, the paper discharge box main body is disposed at an upper position, and the discharged paper is inside the paper discharge box main body. Since the lid portion is provided so as to be movable between a drop allowable position that allows the paper to fall and a fall prevention position that prevents the discharged paper from falling into the discharge box main body, the lid portion is provided. In addition to the effect of the invention of 4, the paper discharged by placing the lid portion in the fall prevention position falls on the lid portion, and this paper can be easily picked up, and the lid portion is allowed to fall. This is convenient for trial printing (confirmation of image position, density, etc.) and the like because the sheets fall into the main body of the paper discharge box and can be stacked.
[0076]
According to a sixth aspect of the present invention, in the paper discharge device according to any one of the first to fifth aspects, the paper discharge box main body is not provided with a bottom surface fence portion, and an outer box body having a bottom surface portion is provided as the mounting table. In addition to the effects of the first to fifth aspects of the invention, the discharge of the paper into the discharge box main body is completed, and the discharge box main body is placed outside. When removed from the box body, paper will be stacked on the outer box body, so this outer box body can be removed from the mounting table, and the loaded paper can be left in that state, and a new outer box body can be installed together with the discharge box body. Since the next paper can be ejected after it is mounted on the mounting table, for example, it can be processed without touching it during the printing drying time, and it is useful for discharging a large amount of paper. It is.
[0077]
According to the invention of claim 7, since the paper discharge device according to claims 1 to 6 is used for the paper discharge unit of the printing apparatus, the effect of the invention of claims 1 to 6 in the printing apparatus. Has the same effect.
[Brief description of the drawings]
FIG. 1 is an overall schematic configuration diagram of a stencil printing apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a discharge box is mounted on the mounting table according to the embodiment of the present invention.
FIG. 3 is a perspective view showing an assembly state of a paper discharge box according to an embodiment of the present invention.
FIG. 4 is an exploded perspective view of a paper discharge box according to an embodiment of the present invention.
5A is a plan view of a discharge box body, FIG. 5B is a left side view thereof, and FIG. 5C is a right side view thereof.
6A and 6B show an embodiment of the present invention, in which FIG. 6A is a front view of a discharge box body, and FIG. 6B is a bottom view thereof.
7A and 7B show an embodiment of the present invention, in which FIG. 7A is a plan view of a lid portion, and FIG. 7B is a right side view thereof.
FIG. 8 is a plan view of a discharge box body illustrating an embodiment of the present invention and illustrating a biasing force acting on a printing sheet with an inclined surface.
FIG. 9 is a rear view of the discharge box body showing an embodiment of the present invention and showing an air escape state when the printing paper is dropped.
FIG. 10 is a plan view of a discharge box body illustrating an embodiment of the present invention and illustrating a biasing force that acts on the printing paper by air pressure when dropped.
11A and 11B show an embodiment of the present invention, in which FIG. 11A is a cross-sectional view of the main part of a discharge box body showing a fall state of printing paper, and FIG. 11B is a view of the discharge box body showing a fall state of printing paper. It is principal part sectional drawing.
FIGS. 12A and 12B show an embodiment of the present invention, in which FIG. 12A is a perspective view of a discharge box body in which a lid is located at a drop-permitted position, and FIG. It is a perspective view of a main body.
FIG. 13 is a perspective view of only the discharge box main body according to the embodiment of the present invention.
FIG. 14 is a perspective view showing a state in which only the discharge box body is mounted on the mounting table according to the embodiment of the present invention.
FIG. 15 is a perspective view of a conventional paper discharge device.
FIG. 16 is a schematic plan view for explaining that paper alignment is not stable in a conventional paper discharge device.
[Explanation of symbols]
1 Stencil printing machine (printing machine)
6 Paper discharge unit (paper output device)
22 Printing paper (paper)
22a The other front corner of the printing paper
22b One rear corner of printing paper
53 mounting table
56 Outlet box body
57 Lid
58 Outer box body
60 Front fence part
61 Rear fence
62, 63 Side fence part
64a Inclined surface (paper guide surface)
65 Air escape hole
A Corner where the front fence and the other side fence meet
S Air escape space

Claims (7)

In a paper discharge device having a mounting table on which a paper subjected to a predetermined process is discharged, and the discharged paper is dropped and stacked,
It has a front fence part that is the front position with respect to the paper discharge direction, a rear fence part that is the rear position, and left and right side fence parts that are arranged on both sides of the front fence part and the rear fence part. An enclosed discharge box main body is provided on the mounting table, and an inner space viewed from above the discharge box main body is provided with a margin larger than the size of the paper, and a rear fence portion of the discharge box main body and A paper guide surface is provided on the inner surface of one of the side fence parts to guide the discharged paper in a corner direction where the front fence part and the other side fence part intersect, and the front fence part and the other side fence part intersect. The corner portion is provided with an air escape hole extending in the height direction and reaching the bottom surface at the bottom, and the inner surface of the four fence portions and the inner space are dropped. An air escape space is formed between the paper and the air pressure that escapes from the air escape space causes a force that urges one of the rear corners on the rear side toward the side of the side fence portion with respect to the paper discharge direction. A paper discharge device characterized in that the shape of the paper discharge box body is configured to work. The paper discharge device according to claim 1.
The paper discharge device according to claim 1, wherein the paper guide surface is an inclined surface that is gradually inclined downward toward the inside. In the paper discharge device according to claim 1 or 2,
The shape of the discharge box body is a parallelogram having a wide angle at the corner where the front fence portion provided with the air escape hole and the other side fence portion meet when viewed from above. Paper discharge device. In the paper discharge device according to any one of claims 1 to 3,
The paper discharge device is characterized in that the paper discharge box body is detachably provided at a predetermined position of the mounting table. In the paper discharge device according to any one of claims 1 to 4,
The discharge box main body is disposed at an upper position, and a drop allowable position that allows the discharged paper to fall into the discharge box main body, and the discharged paper into the discharge box main body. A paper discharge device comprising a lid that can be moved to a fall prevention position for preventing the paper from falling. In the paper discharge device according to any one of claims 1 to 5,
The paper discharge device is characterized in that a bottom fence portion is not provided in the paper discharge box body, and an outer box body having a bottom surface portion is provided between the mounting table and the paper discharge box main body so as to be freely mounted. 7. The printing apparatus according to claim 1, wherein the paper discharge apparatus is used for a paper discharge unit.

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