JP4695548B2 - Output storage device - Google Patents

Description

  The present invention relates to a paper discharge storage device that stores a sheet medium discharged from an image forming apparatus such as a stencil printing machine or a copying machine in a stacked state.

  A sheet discharge base on which a sheet-like medium discharged after image formation (hereinafter, described as paper as an example) can be stacked, and is provided opposite to the sheet discharge base and is orthogonal to the sheet discharge direction. A pair of side fences having discharge guide surfaces parallel to and perpendicular to the discharge direction for aligning the discharge in the discharge width direction, and a downstream end of the discharged sheet-like medium in the discharge direction are received. There is a paper discharge storage device that includes an end fence that performs paper discharge alignment in the paper discharge direction, and the side fence is formed with an opening for ventilation (see, for example, Patent Document 1).

  In the conventional paper discharge storage device, the paper printed by the printing unit is sent out from a position higher than the paper discharge table, and is dropped and stacked on the paper discharge table by its own weight. The paper is ejected to the upper side of the paper discharge tray with a convex shape at the center in the width direction (paper width direction perpendicular to the paper discharge direction), that is, a U-shape. After the front end collides with the end fence, it is landed on the paper discharge tray and sequentially stacked while being guided by the pair of side fences.

  When the paper is dropped, if the air above the paper discharge table and the paper is compressed, the paper cannot be smoothly dropped due to air resistance. Therefore, in order to drop the paper stably, it is necessary to flow the air between the paper discharge table and the paper to the outside. For this reason, a plurality of openings (windows) are opened in the side fence, and air is released from the openings, so that the paper is stably dropped.

Japanese Patent Laid-Open No. 10-59608

  However, especially with respect to the side fence that guides the edge in the width direction of the paper, the wind (from the outside of the air conditioning equipment in the room, the airflow that occurs when a person passes near the stencil printing device to the opening formed in the side fence is formed. If this happens, the air will enter the paper exit from the opening for air to escape, so the U-shape that forms when the paper falls will be destroyed. As a result, there is a problem that the falling posture of the paper is disturbed and the paper cannot be stacked in an orderly manner.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a paper discharge storage device that can prevent paper discharge alignment from being disturbed by a turbulent wind entering from an opening of a side fence and can be stacked in an orderly manner.

The present invention has the following configuration in order to achieve the above object.
According to the first aspect of the present invention, there is provided a paper discharge table on which a sheet-like medium to be discharged after image formation can be stacked, and a paper discharge width direction orthogonal to the paper discharge direction. A pair of side fences having a discharge guide surface parallel to and perpendicular to the discharge direction for aligning the discharge and a downstream end of the discharged sheet-like medium in the discharge direction are received and the discharge is performed. In the paper discharge storage device that includes an end fence that aligns the direction of paper discharge, and the side fence has an opening for ventilation,
At least during the paper discharge enters, at a ventable spacing between each outer surface of the pair of the outer side fences in covering the aperture and these side fences, the disturbance wind the side in the fence from the opening it be configured such that wind means positioned to prevent that, the air between the paper discharge tray and the sheet-like medium was Rukoto be discharged to the discharge tray outside through the opening when the paper discharge .
According to a second aspect of the present invention, in the paper discharge storage device according to the first aspect, the side fences can be displaced toward or away from each other, and the windproof means is displaced along with the displacement of the side fence. .
According to a third aspect of the present invention, in the paper discharge storage device according to the first or second aspect, the space between the windproof means and the outer surface of the side fence communicates with the outside.
According to a fourth aspect of the present invention, in the paper discharge storage device according to any one of the first to third aspects, the wind-proofing means is made of a plate-like member, and is attached with an attaching means that can be attached to and detached from the side fence. It was decided.
According to a fifth aspect of the present invention, in the paper discharge storage device according to any one of the first to third aspects, the wind-proofing means is an air curtain.
According to a sixth aspect of the present invention, in the paper discharge and storage apparatus according to the fifth aspect, the air curtain is formed by a downward air flow with a blower opening for forming the air curtain arranged above or above each side fence. It was decided to be done.
According to a seventh aspect of the present invention, in the paper discharge storage device according to the sixth aspect, a plurality of the air outlets are installed in the side fences, and the air blowing state is determined based on the detection information of the size of the sheet-like medium to be discharged. The air outlet is selectively controlled.

According to the first aspect of the present invention, the air between the discharge table and the sheet-like medium is discharged to the outside of the discharge table through the opening of the side fence at the time of discharging, and the windproof means Since the entry is blocked, the sheet-like medium is neatly stacked.
According to the second aspect of the present invention, since the wind-proof means moves following the side fence, the sheet-like media having different widths are prevented from being disturbed in paper discharge alignment due to the turbulent wind, and the sheet-like media are stacked in an orderly manner.
In the invention according to claim 3, the air that has flowed out from the inside of the side fence through the opening is discharged to the outside through the outer communication portion between the side fence and the windproof means, and the sheet-like medium is smoothly dropped and stacked in an orderly manner. The
In the invention described in claim 4, it is sufficient that the wind-proof means is plate-like (non-breathable), and there is no limitation on the material, and since it is detachable, it is not selected for use in an environment where turbulent wind does not occur. Is also possible.
In the invention described in claim 5, since the windproof means is transparent, the internal loading state can be visually recognized through the opening of the side fence.
In the invention according to claim 6, since the direction of the airflow is downward, the post-treatment of the airflow is easy. In the invention according to the seventh aspect, since the air blowing port to be used is selected according to the size of the sheet-like medium, energy is saved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[1] Comparative Example FIG. 1 shows the appearance of a conventional paper discharge storage device. In FIG. 1, a paper discharge storage device 52 ′ is provided opposite to a paper discharge table 150 ′ on which paper S discharged after image formation can be stacked, and the paper discharge table 150 ′. A pair of side fences 57 ′ having a discharge guide surface 57 b ′ parallel and perpendicular to the discharge direction 152 ′ for performing discharge alignment in the discharge width direction 154 ′ orthogonal to the paper direction 152 ′ are discharged. An end fence 58 ′ for receiving the downstream end of the sheet-like medium S in the paper discharge direction 152 ′ and aligning the paper discharge in the paper discharge direction 152 ′ is provided, and the side fence 57 ′ has a ventilation opening 57a ′. Is formed.

  In order to adapt to the size of the paper to be discharged, the two side fences 57 ′ that make a pair can be pushed and moved in the paper discharge width direction 154 ′ by placing a hand on one of them. The operation mechanism is composed of a combination of a rack and a pinion, for example, and the two side fences 57 ′ can be displaced by an equal amount in a direction toward or away from each other along a guide groove 156 ′ parallel to the paper discharge width direction 154 ′. . Similarly, the end fence 58 'can be moved along a guide groove 158' parallel to the paper discharge direction 152 '.

When there is no turbulent wind entering the opening 57a ′ from the outside, the sheet S sent out from a position higher than the sheet discharge table 150 ′ toward the sheet discharge direction 152 ′ collides with the end fence 58 ′. Tanhaba direction 158 as shown in FIG. 2 'ends of the side falling form a U-shape behind the sheet central portion, the arrows 158 b' discharge while releasing air from the opening 57a 'in the route indicated by It is dropped and loaded on the table 150 by its own weight.

  On the other hand, when there is a turbulent wind entering the opening 57a ′ from the outside as indicated by an arrow 160 ′ in FIG. 3, the position is higher than the sheet discharge table 150 ′ toward the sheet discharge direction 152 ′. The sheet S sent out in this manner falls after colliding with the end fence 58 ′, but the shape of the sheet S is disturbed by the turbulent wind blown from the opening 57a ′. That is, the upper sheet S1 'is still less affected by the disturbance wind, so both ends in the paper discharge width direction 154' have a substantially symmetrical U shape, but are affected by the disturbance wind as the fall proceeds. In the middle position, the sheet S2 'has a larger right side than the left side. The sheet S3 'at the lower position is disturbed in a wavy shape, and if it falls in such a state, it becomes disturbed even in the stacked state.

[2] First Embodiment [2.1] Configuration of Stencil Printing Apparatus A stencil printing apparatus will be described with reference to FIG. 4 as an example of an image forming apparatus to which the paper discharge storage apparatus of the present invention is applied. In the figure, a stencil printing apparatus 100 includes a printing unit 2 for performing printing, a plate making unit 3 for performing plate making, a paper feeding unit 4 for feeding printing paper S, and a plate discharging unit 5 for collecting and storing printed masters. A paper discharge unit 6 that conveys and stores printed paper, and an image reading unit 7 that reads an image of a document.

  The printing unit 2 is disposed in the center of the printing apparatus main body, and has a printing cylinder (hereinafter referred to as a press roller) such as a plate cylinder 8, an ink supply unit 9, and a press roller 10. There is also a printing pressure means using an impression cylinder, which is omitted here. The plate cylinder 8 is constructed by winding a porous support plate 8a around the outer peripheral surfaces of a pair of flanges (not shown) rotatably supported by a support shaft 11 which also serves as an ink supply pipe. Is driven to rotate in the arrow direction A.

  The tip of the support shaft 11 is supported by a side plate of the printing apparatus main body, and a plurality of small holes for supplying ink to the ink supply means 9 are formed on the surface thereof. Each flange (not shown) is rotatably supported by the support shaft 11 via a bearing (not shown).

  The porous support plate 8a formed of a stainless steel thin plate or the like has an aperture portion with a large number of apertures and a non-aperture portion, and the circumferential length of the aperture portion is A3 size. It is formed in a length that allows printing on a sheet of paper. A stage portion 12 having a plane parallel to one generatrix of the plate cylinder 8 is disposed in the non-opening portion, and an openable and closable clamper 13 that locks the tip of the master is disposed on the upper surface of the stage portion 12. Yes. On the outside of the porous support plate 8a, about 1 to 3 layers of mesh screens (not shown) made of polyester or stainless fine wires are wound.

  An ink supply means 9 having an ink roller 14, a doctor roller 15, and the like is disposed in a part located inside the plate cylinder 8 and below the support shaft 11. The ink roller 14 rotatably supports the support shaft 11 between a pair of side plates (not shown) fixed on the support shaft 11 between flanges (not shown), and receives a rotational force from a plate cylinder driving means (not shown). It is transmitted by a rotational force transmitting means such as a gear or a belt and rotates in the same direction as the plate cylinder 8.

  The doctor roller 15 is rotatably supported between the side plates at a position where a slight gap is formed between the outer peripheral surface of the doctor roller and the outer peripheral surface of the ink roller 14, and the rotational force from the plate cylinder driving means (not shown) is not shown. It is transmitted by the rotational force transmitting means and rotates in the direction opposite to the ink roller 14. In the vicinity of the ink roller 14 and the doctor tiger 15, a wedge-shaped ink reservoir 15 a is formed by the ink supplied from the support shaft 11.

  A press roller 10 is disposed below the plate cylinder 8. The press roller 10 is rotatably supported between a pair of press roller arms (not shown), and each press roller arm is supported integrally and swingably by a swing means (not shown). In addition, a locking means (not shown) that holds the press roller 10 in a state of being separated from the outer peripheral surface of the plate cylinder 8 is disposed in the vicinity of the swinging means (not shown).

  A plate making unit 3 is disposed on the upper right side of the printing unit 2. The plate making unit 3 includes a master storage unit 20, a platen roller 21, a thermal head 22, a cutting unit 23, a master transport roller pair 24, 25, and the like. The master storage means 20 rotatably and detachably supports a core portion 27a of a master roll 27 obtained by winding a master 26 in which a thermoplastic resin film and a porous support are bonded together in a roll shape.

  A platen roller 21 and a thermal head 22 are arranged on the left side of the drawing with respect to the master storage means 20 and on the downstream side in the master transport direction. The platen roller 21 is rotatably supported on a side plate (not shown) of the printing apparatus main body and is driven to rotate by a stepping motor (not shown).

  A thermal head 22 having a large number of ripening elements is attached to a side plate (not shown) of the printing apparatus main body and is pressed against the platen roller 21 by a biasing force of a biasing means (not shown). The thermal head 22 selectively heats the ripening element while making contact with the thermoplastic resin film surface of the master 26, and performs hot melt perforation plate-making on the master 26.

  The cutting means 23 is disposed downstream of the platen roller 21 and the thermal head 22 in the master transport direction. The cutting means 23 composed of the fixed blade 23a and the movable blade 23b has a known configuration in which the movable blade 23b rotates with respect to the fixed blade 23a fixed to the side plate of the printing apparatus main body.

  Master transport roller pairs 24 and 25 and a guide plate 28 are arranged downstream of the cutting means 23 in the master transport direction. The master conveying roller pair 24, 25 includes driving rollers 24a, 25a that are driven to rotate synchronously by a driving unit (not shown), and driven rollers 24b, 25b that are pressed against the driving rollers 24a, 25a by a biasing unit (not shown). It is composed of

  A guide plate 28 is fixed to the side plate, guides the master 26 transported by each master transport roller pair 24, 25, and guides the tip of the master 26 to the outer peripheral surface of the plate cylinder 8. The paper feed unit 4 is disposed below the plate making unit 3. The paper feed unit 4 includes a paper feed tray 30, a paper feed roller 31, a separation roller 32, a separation roller 33, a registration roller pair 34, and the like.

  The paper feed tray 30 is attached to the inside of the casing side plate (not shown) so as to be movable in the vertical direction perpendicular to the discharge direction. Above the paper feed tray 30, a paper feed roller 31, a separation roller 32, and a separation roller 33 each having a high friction resistance member on the surface are disposed. The paper feed roller 31 and the separation roller 32 are pressed against the paper S on the paper feed tray 30 with a predetermined pressure, and are synchronized with each other by a common stepping motor via a driving force transmission means (not shown) such as a gear or a belt. Is rotated. The separation roller 33 is pressed against the separation roller 32 with a predetermined pressure, and is disposed so as to be intermittently rotatable in the same direction as the separation roller 32.

  A pair of registration rollers 34 is arranged on the downstream side of the separation roller 32 and the separation roller 33 in the sheet conveyance direction. The registration roller pair 34 is composed of a driving roller 34a and a driven roller 34b, and a rotational driving force from a plate cylinder driving means (not shown) is transmitted by a drive transmission means such as a gear or a cam, so that the driving roller 34a is moved to the plate cylinder 8. The sheet S is fed toward the printing unit 2 by a driven roller 34b that is rotated at a predetermined timing synchronized with the rotation of the roller and is in pressure contact with the driving roller 34a.

  A plate discharging unit 5 is disposed on the upper left side of the printing unit 2. The plate removal unit 5 includes an upper plate removal member 40, a lower plate removal member 41, a plate removal box 42, a compression plate 43, and the like. The upper plate discharging member 40 includes a driving roller 44, a driven roller 45, and the like, and the driving roller 44 is rotated clockwise in FIG.

  The lower plate removal member 41 includes a driving roller 46, a driven roller 48, and the like, and is driven by driving force of driving driving means (not shown) that rotationally drives the driving roller 46 by driving transmission means such as a gear and a belt. The roller 46 rotates counterclockwise in FIG.

The plate discharge box 42 is detachably attached to the printing apparatus main body, and stores the used master 26a therein. Upper plate discharge member 40, the compression plate 43 to push the used master 26a carried depending on lower discharge plate member 4 1 inside a plate remover box 42 is vertically movably supported by a not shown lifting means.

A paper discharge unit 6 is disposed below the plate discharge unit 5. The paper discharge unit 6 includes a peeling claw 50, a paper discharge conveyance member 51, a paper discharge storage device 52, and the like.
The peeling claw 50 is slidably supported on the side plate of the printing apparatus main body by a support shaft 50a that peels off the printed paper S from the outer peripheral surface of the plate cylinder 8. Are selectively swung between a position near the outer peripheral surface of the plate cylinder 8 and a position where the tip of the plate cylinder 8 does not interfere with obstacles such as the clamper 13 that is moved by the rotation of the plate cylinder 8.

  The paper discharge conveying member 51 includes a driving roller 53, a driven roller 54, an endless belt 55, a suction fan 56, and the like. The drive roller 53 is rotatably supported by a unit side plate (not shown) and is driven to rotate by a drive means (not shown). The driven roller 54 is also rotatably supported on the same side plate, and a plurality of endless belts having a plurality of openings are spanned between the driving roller 53 and the driven roller 54. A suction fan 56 is disposed below the driving roller 53, the driven roller 54 and the endless belt 55. The paper discharge conveyance member 51 conveys the paper S on the endless belt 55 in the direction of the arrow in the drawing by the suction force of the suction fan 56.

  The paper discharge storage device 52 has a paper discharge tray 150 on which the printed paper S conveyed by the paper discharge conveyance member 51 is stacked, a pair of side fences 57 movable in the paper width direction, and movable in the paper conveyance direction. A single end fence 58.

  The basic configuration of the discharge storage device 52 including the discharge tray 150, the side fence 57, the end fence 58 and the like is the discharge tray 150 ′, the side fence 57 ′, and the end fence 58 ′ in the comparative example described in FIGS. This is the same as the paper discharge storage device 52 ′ composed of the like. Incidentally, a plurality of openings 57 a are opened in the side fence 57 in order to extract air on the paper discharge tray 150.

  The difference from the paper discharge storage device in the comparative example is that the paper discharge storage device 52 in the present invention is accompanied by windproof means as will be described later. In other words, the paper discharge storage device 52 of the present invention has the same configuration as each component in the paper discharge storage device 52 'of the comparative example described in FIG. 1 to FIG.

  The image reading unit 7 is disposed on the upper part of the casing constituting the exterior of the stencil printing apparatus 100. The image reading unit 7 includes a document receiving tray 61 on which the document 60 is stacked, a contact glass 62 on which the document is placed, a document roller pair 63 and a document transport roller 64 that transport the document 60, and a guide plate that guides the document 60 to be transported. 65, 66, a plurality of document conveying belts 67 that convey the document 60 along the contact glass 62, a document tray 68 on which the read document 60 is stacked, and the members other than the contact glass 62, and support each member. A pressure plate 69 provided so as to be able to contact and separate, a reflecting mirror 70 and 71 and a fluorescent lamp 72 for scanning and reading a document image, a converging lens 73 for converging the scanned image, and a CCD ( charge coupled device) and the like.

  In the above configuration, an automatic separating and conveying device 75 is constituted by the original receiving tray 61, the original conveying roller pair 63, the original conveying roller 64, the guide plates 65 and 66, the original conveying belt 67, the original tray 68, and the like. Further, the document reading means 76 is constituted by the contact glass 62, the reflecting mirrors 70 and 71, the fluorescent lamp 72, the lens 73, the image sensor 74, and the like.

  A plurality of document size detections that detect the size of the document 60 to be transported or the document 60 placed on the contact glass 62 are located between the plurality of document transport belts 67 and below the contact glass 62. A sensor 77 is arranged. The document detection sensor 77 which is a reflection type sensor detects the size of the document 60 based on the difference in the amount of reflection on the contact glass 62. A document presence / absence detection sensor 78 for detecting the document 60 remaining on the document tray 61 is disposed below the document tray 61. The document presence / absence detection sensor 78 outputs a signal to the control means when the document 60 is no longer on the document tray 61.

[2.2] Printing operation of stencil printing apparatus The operation of the stencil printing apparatus 100 will be described below. When the manuscript is set on the image reading unit 7 by the operator and the plate making start key on the operation panel is pressed, the image magazine collecting unit 7 performs the manuscript reading operation. The read image is stored as a data signal in an image memory (not shown).

  At the same time as the reading operation, the plate cylinder 8 starts to rotate, and the plate discharging operation of the used master from the plate cylinder 8 in the plate discharging unit 5 is performed. The used master peeled off from the plate cylinder 8 by each plate discharging member is discarded in the plate discharging box 42 and then compressed by the compression plate 43. After completion of the plate removal operation, the plate cylinder 8 rotates again and stops at the plate supply standby position shown in FIG. 4, the clamper 13 is opened, and the stencil printing apparatus enters the plate supply standby state.

  When the stencil printing apparatus enters the plate feeding standby state, the platen roller 21 and the drive rollers 24b and 25b are rotationally driven, and the master is pulled out from the master roll. The drawn master heats each ripening element of the thermal head 22 based on the image data signal stored in the image memory, so that the surface of the thermoplastic resin film can be perforated by heating to form a plate-making image.

The master 26 is transported by the platen roller 21 and each master transport roller pair while being made by the thermal head 22, and is sent to the clamper 13 opened by being guided by each guide plate. When the leading edge of the stencil 26 by stearyl number of taps of the stepping motor is determined to have reached the predetermined position sandwiched clamper 13, the clamper 13 is closed by operating the closing means, not shown, the plate cylinder 8 The tip of the master made from the plate is held on the outer peripheral surface of the plate.

  Thereafter, the plate cylinder 8 is rotationally driven in the clockwise direction in FIG. 1 at the same peripheral speed as the plate making conveyance speed of the master 26, and the winding operation of the master 26 around the plate cylinder 8 is performed. When it is determined that the plate making for one plate is completed by the number of steps of the stepping motor, the rotation of the platen roller 21 and each of the master transport roller pairs 24 and 25 is stopped and the movable blade 23b is rotated to move the master 26. Is disconnected.

  The cut master 26 is pulled out of the plate making section 3 by the rotation of the plate cylinder 8, and when all the masters 26 are wound on the plate cylinder 8, the plate cylinder 8 rotates to the home position and stops, and the winding operation is performed. Is completed.

  When the winding operation is completed, the plate cylinder 8 is driven to rotate in the clockwise direction in FIG. 1 at a low speed, and one sheet of paper is separated and fed from the paper feeding unit 4. The sheet S separated and fed by the separation roller 32 and the separation roller 33 is temporarily stopped with its leading end abutting against the nip portion of the registration roller pair 34. The temporarily stopped sheet S is driven by the drive roller 34a being rotated at a predetermined timing when the leading edge of the image area of the master that has been wound around the plate cylinder 8 reaches the position corresponding to the press roller 10. Then, the sheet is fed between the plate cylinder 8 and the press roller 10.

  Almost simultaneously with the rotation of the driving roller 34a, a swinging means (not shown) is operated so that the press roller 10 presses the outer peripheral surface thereof against the outer peripheral surface of the plate cylinder 8, and the sheet S fed by the registration roller pair 34 is transferred to the plate cylinder 8. It is pressed by the master 26 wound around. By this pressing operation, the press roller 10, the sheet S, and the master 26 are pressed against each other, and the ink supplied to the inner peripheral surface of the plate cylinder 8 by the ink roller 14 oozes out from the opening portion of the plate cylinder 8, After the mesh screen (not shown) and the porous support of the master 26 are filled, they are transferred to the paper through the perforated portion of the master 26, and so-called printing is performed.

  The sheet S to which the image is transferred by printing is peeled off from the outer peripheral surface of the plate cylinder 8 by the peeling claw 50, falls downward, and is sent onto the paper discharge conveying member 51. The paper S sent to the paper discharge conveyance member 51 is conveyed to the left while being attracted to the upper surface of the endless belt by the suction force of the suction fan 56, and is formed into a U shape by the paper discharge conveyance unit 51. S is discharged onto the paper discharge storage device 52 and guided by the pair of side fences 57, the front end of the paper collides with the end fence 58, and then falls downward due to the weight of the paper. It is neatly loaded while being guided by 57.

  When the paper is dropped, air exists below the paper. A plurality of openings 57a are formed in the side fence 57 in order to draw the air to the outside of the paper discharge table. By pulling out the air to the outside of the paper discharge table, the paper S can fall downward while maintaining the U-shape when discharged. Further, a windproof means is provided to prevent the entry of turbulent wind from the opening 57a.

  Thereafter, the plate cylinder 8 is rotated again to the home position and stopped, and the stencil printing apparatus is put into a printing standby state after finishing the printing operation. After the printing operation is completed, after the printing conditions are set, the operator presses the test printing key on the operation panel, whereby one sheet is printed by the printing operation as described above.

  When the image position, the image density, and the like are determined by trial printing, the print start key on the operation panel is pressed by the operator after setting the print conditions and the number of prints, and the predetermined print operation is performed. Is printed. Further, when the plate making key is pressed after the continuous key on the operation panel is pressed and various conditions are set, the printing operation is continuously performed after the printing is completed.

[2.3] Wind Protecting Means in Plate Discharge Storage Device A description will be given with reference to FIG. In discharge housing device 52 in this example, securing the windbreak wall member 80 in which the plate-shaped as a windbreak means on the top of each side fences 57 forming a pair, in a cantilever supported by a supporting member 81.

Windbreak wall member 80 is the front-rear direction and located at a ventable interval X through the downward and the plane between the outer surface of each outwardly covers the opening 57 a and these side fences 57 of the pair of side fences 57 have been opened, it is communicated with each opening 57 a outward. Since the windbreak wall member 80 is fixed to the side fence 57, the windbreak wall member 80 can be slid in the paper discharge width direction 154 integrally with the side fence 57 in accordance with the sheet width.

Since windbreak wall member 80 is fixed to the side fence 57, the paper discharge prevents the entry of the opening 57 of the disturbance wind, and does not interfere with the discharge of air from the opening 57 a. In this example, the windbreak wall member 80 is provided outside the side fence 57 by a certain amount X (for example, about 50 mm) in such a manner as to hang downward from the upper side of the side fence. The escape of the air accompanying the fall of the discharged paper is ensured through a plurality of openings 57a of the side fence, and the air escapes from the gap between the side fence and the windbreak wall.

  In addition, against turbulence, the windbreak wall 80 provided downward from the upper side of the side fence can prevent intrusion into the side fence where the paper discharge table 150 is located, and the discharged paper can be dropped, In addition, the paper discharge alignment can be maintained without affecting the stacking. Further, since one end portion of the windbreak wall member 80 is fixed to the upper portion of the side fence, the side fences move toward each other according to the size of the paper to be discharged, and move integrally with the separation operation. It can be adapted to the paper and the influence of the turbulence on the paper discharge can be eliminated.

The wind barrier member 80 can be made of any material such as sheet metal, resin, and mylar as long as it has strength to achieve the windproof function, and can improve workability and reduce costs. For example, a plate-like structure can be manufactured by sheet metal processing, and has a strength and is not air permeable, so that it can be completely shut down against a turbulent wind. Alternatively, by making the windbreak wall member 80 a resin material, it is possible to integrate with the resin of the material of the side fence 57. In that case, the support member 81 is also integrated, and sufficient strength is obtained by the integral configuration with the side fence. Can be obtained, and the cost can be reduced. Furthermore, the cost can be further reduced by using a thin mylar member.
[3] Second Embodiment Referring to FIG.
In this example, in the paper discharge storage device 52, a plate-shaped windbreak wall member 82 as a windbreak means is attached to and detached from the upper portion of each pair of side fences 57 using the plate thickness portion on the side fence 57. It has a combined structure.

  As shown in FIG. 6A, the windbreak wall member 82 has a U-shaped engaging portion 82a opened downward. The U-shaped gap Z that constitutes the engaging portion 82 a is manufactured to a size that can be engaged and held with the thickness portion of the side fence 57. Further, the inner dimension of the portion which is further bent in an L shape from the engaging portion 82a and goes out by the bending is the same as the interval X in FIG. Moreover, if it can be manufactured in such a shape, the windbreak wall member can be made of any material of sheet metal, resin, and mylar.

FIG. 6B shows a state in which the windbreak wall member 82 configured as described above is attached to the side fence 57. As shown in FIG. 6B, the engagement portion 82a is engaged and mounted so as to straddle the upper portion of the side fence 57. In the mounted state, the U-shaped portion of the windbreak wall member 82 is firmly engaged with the upper portion of the side fence 57 and integrated with the side fence 57.
The windbreak wall member 82 of this example covers the openings 57 on the outer sides of the pair of side fences 57 and allows air to pass between the outer surfaces of the side fences 57 as in the windbreak wall member 82 in FIG. The front-rear direction passing through the lower side and the paper surface is opened, and the opening 57 communicates outward. Since the windbreak wall member 80 is detachably attached to the side fence 57, the windbreak wall member 80 can be slid in the paper discharge width direction 154 together with the side fence 57 according to the sheet width.

  The windbreak wall member 82 is attached to the side fence 57, prevents entry of turbulent wind from the opening 57 during discharge, and does not prevent discharge of air from the opening 57. Similar to the windbreak wall member 80 in FIG. 5, the windbreak wall member 82 hangs downward from the side fence upper portion on the outer side away from the side fence 57 by a certain amount X (for example, about 50 mm). As in the past, air escape due to the fall of the discharged paper is secured through a plurality of openings 57 in the side fence, and air is released from the gap between the side fence and the windbreak wall. .

  In addition, against turbulence, the windbreak wall 80 provided downward from the upper side of the side fence can prevent intrusion into the side fence where the paper discharge table 150 is located, and the discharged paper can be dropped, In addition, the paper discharge alignment can be maintained without affecting the stacking. In addition, since the wind barrier member 80 is detachably attached to the upper portion of the side fence, the side fences move toward each other according to the size of the paper to be discharged, and move integrally with the separating operation. It can be applied to various sizes of paper and can eliminate the influence of the turbulence on paper ejection.

  The windbreak wall member 82 can be in a state in which the windbreak wall member 82 is removed when the installation environment of the paper discharge storage device is free from turbulence. Further, when the environmental conditions change and the influence of disturbance wind comes out, it is possible to easily cope with the environment by installing the windbreak wall member 82. Thus, in the windbreak wall member 82 having a shape to be hooked and engaged with the upper part of the side fence 57, it can be installed by easily hooking the windbreak wall member 82 on the upper part of the side fence 57, If it is configured to be symmetric, there will be no mistake in mounting to the left and right side fences.

[4] Unlike the third exemplary embodiment so far, the present embodiment constitutes a windproof means by d red Ten by airflow air.
In FIG. 7, the blower fans 84 are provided in the upper part separated by a certain amount X with respect to the outer sides of the pair of side fences 57, and the blower ports (air curtain forming nozzles) of the blower fans 84 are directed downward from the upper part. By arranging, the air curtain 86 as a wind-proof means is formed with the airflow which faces downward from the top. Since the air curtain 86 is generated only while the blower fan 84 is driven, the influence of the disturbance wind can be eliminated by driving the blower fan 84 at least during paper discharge.

Formation of air curtain 86 is the same as the previous examples, the error red Ten 86 formed at a position apart a predetermined amount X to the outside of the pair of side fences 57, to function as a windbreak wall by the air, the opening 57a To prevent the entry of turbulent winds. As a result, it is possible to maintain the paper discharge alignment as in the embodiments described above. Further, since the blower fan 84 is fixed to the upper portion of the side fence, a windbreak wall formed by an air curtain can be formed following the movement of the side fence 57 in the paper discharge width direction 154 according to the paper size to be discharged. it can. Further, if necessary, the blower fan 84 can be provided integrally with the side fence 57 above the side fence, and similarly, a wind barrier by an air curtain can be formed.

As shown in FIG. 8, by providing a plurality of blower fans 84, and thus providing a plurality of blower openings, the formation area of the air curtain can be expanded and the opening 57a can be covered more reliably, and disturbance wind can be generated. it is possible to form a strong error red Ten from blocking. In addition, since a blower port can also be comprised by piping which branched the wind from one fan, it does not necessarily respond | correspond to arrange | positioning several ventilation ports and providing several ventilation fans.

  On / off control of the blower fan is driven by the blower fan on (ON) signal entering the control means (including the central processing unit) after pressing the prepress / print key on the operation panel of the printing press. After the printing is finished and the rotation of the plate cylinder is stopped, the blower fan can be stopped by sending an OFF (OFF) signal to the blower fan via the control means.

  For example, a paper size detection unit is arranged in the paper supply unit 4 shown in FIG. 4, the paper size detection unit detects the size of the paper, and based on the information, the control unit (including the central processing unit) blows the fan. Controls the number of times / time that is turned on. The side fence and the end fence are matched according to the paper size. For example, in the small size paper, the number of times / time that the blower fan is turned on (ON) is increased compared to the large size paper.

  As shown in FIG. 9 which is a plan view of the paper discharge storage device, when the paper to be discharged is B5 size, the suitable position of the end fence 58 is the position indicated by the reference numeral 58a, and the suitable position of the side fence 57. Although not shown, it is adjusted to the paper width. In this case, the blower fan with respect to the paper discharge direction 152 is one blower fan located on the upstream side among a plurality of blower fans (or blower ports) installed on one side fence (a total of two of the pair of side fences is 2). In this example, there are only the blower fans 84a (two units). Only the blower fans 84a (two units) are operated. The other blower fans 84b, 84c, and 84d are not affected at all because they are installed outside the sheet size.

When the paper to be discharged is A4 size, the suitable position of the end fence 58 is the position indicated by reference numeral 58b. In this case, the blower fan drive number is only the blower fans 84a and 84b from the upstream side (four in total).
When the discharged paper is B4 size paper, the end fence conforming position is the position indicated by reference numeral 58c. The blower fan drive radix in this case is the blower fans 84a, 84b, and 84c from the upstream side.
When the discharged paper is A3 size paper, the end fence conforming position is the position indicated by 58d. The blowing fan drive radix in this case is all in FIG. 9 and is the blowing fans 84a, 814, 84c, and 84d.
Thus, it is possible to form the error red one ten against more accurately paper size by controlling the drive base (number) of the blower fan Te containing Align the paper size.

It is an external perspective view of a paper discharge storage device as a comparative example. FIG. 10 is an explanatory diagram of a state where a paper discharge is dropped when there is no turbulence in a paper discharge storage device as a comparative example. FIG. 10 is an explanatory diagram of a discharged state when there is a turbulent wind in a discharged paper storage device as a comparative example. It is a schematic block diagram of a stencil printing apparatus. It is a front view of the paper discharge storage apparatus explaining the type fixed to a side fence by an example of a wind-proof means. (A) is the external appearance perspective view of a detachable windproof means, (b) is the external perspective view which showed the detachable windproof means of the state attached to the side fence. It is the front view explaining the wind-proof means by an air curtain. It is a side view of the paper discharge storage device in which a plurality of blower fans for creating windproof means by an air curtain are installed. It is the figure explaining changing the drive radix of a plurality of ventilation fans according to paper size.

Explanation of symbols

57, 57 'Side fence 57a, 57a' Opening 57b, 57b 'Discharge guide surface 58, 58' End fence 82 Engagement section 84 Blower fan 86 Air curtain 152, 152 'Discharge direction 154, 154' Discharge width direction

Claims (7)

A sheet discharge table on which sheet-like media discharged after image formation can be stacked, and the sheet discharge medium provided on the sheet discharge table so as to face the sheet discharge medium in the sheet discharge width direction orthogonal to the sheet discharge direction. A pair of side fences having a discharge guide surface parallel and perpendicular to the discharge direction, and an end for receiving the downstream end of the discharged sheet-like medium in the discharge direction and aligning the discharge in the discharge direction In the paper discharge storage device that includes a fence, and the side fence has an opening for ventilation,
At least during the paper discharge enters, at a ventable spacing between each outer surface of the pair of the outer side fences in covering the aperture and these side fences, the disturbance wind the side in the fence from the opening it be configured such that wind means positioned to prevent that, characterized that you discharged to the discharge tray outside through the opening of air between the paper discharge tray and the sheet-like medium when the paper discharge A discharge storage device. The paper discharge storage device according to claim 1.
The paper discharge storage device according to claim 1, wherein the side fences are displaceable in a direction toward or away from each other, and the windproof means is displaced along with the displacement of the side fences. The paper discharge storage device according to claim 1 or 2,
A paper discharge storage device, wherein a space between the windproof means and the outer surface of the side fence communicates with the outside. In the paper discharge storage device according to any one of claims 1 to 3,
The paper discharge storage device according to claim 1, wherein the wind-proofing means is made of a plate-like member and has attachment means detachably attached to the side fence. In the paper discharge storage device according to any one of claims 1 to 3,
The paper discharge storage device according to claim 1, wherein the windproof means comprises an air curtain. The paper discharge storage device according to claim 5.
The paper discharge storage device according to claim 1, wherein an air curtain is formed by a downward air flow with an air outlet for forming the air curtain arranged above or above each side fence. The paper discharge storage device according to claim 6.
A plurality of the air outlets are installed in each side fence, and the air outlets that are in a blowing state are selectively controlled based on detection information of the size of the sheet-like medium to be discharged. .

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