JP4749737B2 - Stencil printing machine - Google Patents

Description

The present invention relates to a stencil printing machine .

  Conventionally, a roll-shaped stencil sheet is accommodated in the stencil sheet storage unit, the accommodated stencil sheet is pulled out and heated and perforated by the stencil making unit, and the stencil sheet is transported toward the stencil feeding device, The stencil sheet is supplied to the printing apparatus by the stencil feeding device, while the paper transported from the paper feed tray is supplied to the printing apparatus. In the printing apparatus, the ink is permeated through the perforated portion of the stencil sheet to form the paper. Stencil printing machines adapted to transfer are known.

  The stencil sheet is generally used by bonding a thermoplastic film such as polyester to an ink permeable support such as Japanese paper or nonwoven fabric with an adhesive. However, this base paper is wasteful because the ink is absorbed by the support, and various problems have been pointed out, such as the number of plates per roll being reduced because the base paper is thick, and therefore the support is omitted. Various attempts have been made to use a stencil sheet of a single film (for example, Patent Document 1 below).

  A stencil sheet of a single film without a support is likely to wrinkle or sag due to the weakness of the material, and the tip part may curl due to curl or internal stress. It becomes difficult to perform initial setting. Further, when the stencil sheet after the plate making is supplied to the printing apparatus, the weakness of the material similarly becomes a problem.

  For this reason, in Patent Document 1, the stencil sheet is drawn out by holding the leading end of a roll-shaped stencil sheet with the leading end of an arm-shaped clamping member, and swinging the clamping member around the horizontal axis. When the plate making is started, the clamping member is further swung to convey the leading end portion of the stencil sheet to the plate cylinder and feed the plate cylinder to the clamper.

  The applicant of the present application has previously proposed a plate feeding apparatus shown in FIG. 20 (Japanese Patent Application No. 2004-149218). This plate supplying apparatus includes a cylindrical roller 202 that conveys the stencil sheet 200 along the outer peripheral surface to the printing apparatus 201. The roller 202 is formed with a through slit 203 that extends in a direction perpendicular to the conveying direction. A buffer member 204 disposed so as to avoid the through slit 203 and a cover guide 205 that forms a transport path between the outer peripheral surface 202 are provided on the outer peripheral surface of 202. Then, the stencil sheet 200 passing through the conveyance path is locked by a plate supplying member 206 protruding from the through slit 203, and the locked stencil sheet 200 is supplied to the clamping member 208 of the stencil mounting body 207. .

JP 2000-211122 A

  In the above-mentioned Patent Document 1, since the stencil sheet is conveyed toward the plate cylinder and fed in a state where the leading end of the stencil sheet is held, wrinkles and slack can be suitably prevented even with a stencil sheet having low stiffness. There is an advantage. However, the number of parts is increased due to the presence of the clamping member and its driving mechanism, resulting in a complicated structure and increased cost.

  In the case of the technique shown in FIG. 20 as well, the stencil sheet 200 is conveyed through the conveyance path while being sandwiched between the cover guide 205 and the buffer member 204, so that tension is applied to the stencil sheet 200 to generate undulations and wrinkles. There is an advantage that the stencil sheet 200 is protruded and the stencil sheet 200 is pushed into the sandwiching member 208 to apply tension to the stencil sheet 200 to prevent the occurrence of undulations and wrinkles. However, the conveyance roller 202 having a complicated structure including the through slit 203, the buffer member 204, and the like is required, and further, control for timing the drive mechanism of the conveyance roller 202 and the operation timing with the plate feeding member 206 is necessary. There are disadvantages that the number of parts increases, the structure and control become complicated, and the cost increases.

The present invention provides a stencil printing machine that can easily and surely supply a stencil mounting body to a stencil mounting body without requiring complicated control even for a stencil sheet having a low stiffness substantially consisting only of a film. The purpose is to provide.

Invention of claim 1, and supplies the conveyed stencil sheet, the stencil mounting body of the printing apparatus are plate making by the plate making apparatus, a plate feed unit, and a clamp driving mechanism for opening and closing the clamp fixture of the stencil sheet, the Oite the stencil printing machine comprising, in a stencil mounting member, and the clamping member is provided rotatably, is provided retractably in the conveying direction of the stencil sheet by the plate making apparatus, and, when advanced, in the transport direction A stencil feeding device is provided with a stencil feeding member for engaging the stencil paper bent in the direction intersecting the stencil paper over the entire width and supplying the stencil paper to the stencil mounting body. The stopped stencil member advances from above to the clamp tool with the stencil mounting body opened so that the stencil paper is placed from above, and the clamp opening / closing mechanism closes the clamp tool so that the stencil paper is clamped by the stencil mounting body. After being paid Material is retracted, characterized in that.

  According to a second aspect of the present invention, in the first aspect of the present invention, the stencil sheet is provided with suction means for bending the end portion of the stencil sheet in a direction intersecting the transport direction by suction.

  According to a third aspect of the present invention, in the invention of the second aspect, the stencil printing apparatus is configured such that the stencil sheet is disposed on the downstream side of the suction direction with respect to the suction holes formed on the transport path surface of the stencil base paper. A suction chamber provided on the back side of the conveyance path surface, and the suction means removes the stencil sheet on the conveyance path surface through the suction holes. In order to perform suction, the suction chamber is connected to the suction chamber so as to create a negative pressure, and the end of the stencil sheet is sucked from the opening into the suction chamber by the suction means. And is supplied to the stencil mounting body.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the plate supplying member is configured to latch the rear end portion in the conveying direction of the stencil sheet and supply it to the stencil mounting body.

According to the first and fourth aspects of the present invention, the stencil sheet is advanced in the conveying direction of the stencil sheet, and the stencil sheet bent in the direction intersecting the conveying direction is locked and supplied to the printing apparatus. Thus, even a stencil sheet having a low stiffness substantially consisting only of a film can be reliably supplied. Further, since the plate feeding member which can be moved back and forth is provided, a complicated mechanism such as a conventional film clamping member and a transport roller is unnecessary, and the structure can be simplified.

  According to the invention of claim 2, since the end portion of the stencil sheet is sucked by the suction means, wrinkles, slack, and curls are stretched even if the stencil sheet is weak and consists essentially of a film. be able to. Then, the stencil sheet can be reliably locked and supplied to the stencil mounting body by projecting the stencil supply member in that state. Further, the suction means and the plate supply member can perform plate supply with a simple configuration with a small number of parts, and complicated control is not required.

  According to the invention of claim 3, in the plate making apparatus, since the stencil sheet is adsorbed to the suction holes on the conveyance path surface, the stencil sheet is conveyed to the plate feeding apparatus in a state where wrinkles and slack are extended, Thereafter, the stencil sheet can be supplied by the stencil feeding device more reliably without wrinkles or slack. Further, the plate-making apparatus and the plate-feeding apparatus can share the suction chamber and the suction means, thereby further simplifying the structure, reducing the size, and reducing the cost.

[First Embodiment]
FIG. 1 is a side sectional view schematically showing a stencil printing machine according to an embodiment of the present invention. The stencil printing machine includes an image reading device 8, a plate making device 11, a printing device 12, a plate feeding device 13, a paper feeding device 14, a paper discharging device 15, a plate discharging device 16, and the like. It is mainly composed to prepare for. The image reading device 8 reads an image of a document placed on a document table and generates image data. The plate making apparatus 11 draws out a roll-shaped stencil sheet 17 and heats and punches image data of the original to make a plate. The plate feeding device 13 supplies the stencil sheet 17 that has been subjected to plate making to the printing device 12. The paper supply device 14 conveys the printing paper 114 to the printing device 12, and the paper discharge device 16 discharges the printed printing paper 114. The plate discharging device 17 discharges the stencil sheet 17 used for printing from the printing device 12. An arrow X1 in FIG. 1 indicates the conveyance direction of the printing paper 14, and in the following description, the upstream side in the conveyance direction X1 is the rear side, and the downstream side is the front side.

  The stencil sheet 17 of this embodiment is made of only a thermoplastic resin film material, for example, a polyester film material having a thickness of about 10 μm. However, film materials of other materials such as polyethylene resin film material and polyvinyl chloride resin film material may be used, and a thermoplastic resin film material and an ink permeable support such as Japanese paper or nonwoven fabric are bonded together. A thing may be used.

[Configuration of Printing Apparatus 12]
The printing apparatus 12 includes a multi-cylinder stencil mounting body 19 having two rollers 18, and the stencil sheet 17 fed from the plate feeding apparatus 13 is sandwiched by a sandwiching member 20 so as to be stencil mounting body 19. Wrapped in. The double cylinder type stencil mounting body 19 includes two rollers 18 arranged in parallel with a space in the vertical direction, pulleys (not shown) provided coaxially with the rollers 18 on both sides of each roller 18, An endless belt 21 (only one is shown) that is stretched between two pulleys on the same side of both rollers 18, and the stencil sheet 17 after plate making is stretched along the two rollers 18 and wound. It has come to be.

  The clamping member 20 is installed between both endless belts in a direction orthogonal to the winding direction (arrow B direction) of the stencil sheet 17, and clamps the leading end and the trailing end of the stencil sheet 17 respectively. In order to do so, it is provided in two places.

[Configuration of Plate Making Apparatus 11]
FIG. 2 is a perspective view of the plate making apparatus and the plate feeding apparatus, and FIG. 3 is a front sectional view of the same. The plate making apparatus 11 includes an apparatus frame body 22, a base paper container 10, a plate making section 24, a transport section 25, and a storage section 26. The apparatus frame body 22 includes left and right vertical walls. 27 and an upper cover 28 that can be freely opened and closed. The base paper storage unit 10, the plate making unit 24, and the conveyance unit 25 are arranged in this order from left to right in FIG. 3, and the storage unit 26 is arranged below the conveyance unit 25. Each part is disposed between the left and right vertical walls 27. An arrow X2 in FIG. 3 indicates the conveyance direction of the stencil sheet 17 in the plate making apparatus 11, and is the same direction as the conveyance direction X1 of the printing paper 14 in FIG.

  The base paper container 10 has left and right upright walls 29, front and rear upright walls 30B and 30A, and a bottom wall 31, and has an open top. The left and right standing walls 29, the rear standing wall 30A and the bottom wall 31 are integrally formed to constitute a housing member. The housing member is supported by a support base 32 provided between the left and right vertical walls 27 so as to be movable back and forth, and is biased in the right direction (conveying direction X2) in FIG. The front wall 30 </ b> B of the base paper container 10 is constructed between the left and right vertical walls 27. The stencil sheet 17 is inserted and held between the front, rear, left and right standing walls 30B, 30A, 29, 29.

  The plate making unit 24 includes a thermal head 33 and a platen roller 34. The thermal head 33 is supported by a support rod 35 installed on the left and right vertical walls 27 via a bracket 36, and the platen roller 34 has a horizontal axis and is in contact with the upper surface of the thermal head 33. Has been placed.

  The transport unit 25 includes a road surface plate 37 and a transport roller 38 disposed above the road surface plate 37. The road surface plate 37 has a flat upper surface disposed horizontally and is laid between the left and right vertical walls 27.

  The transport roller 38 is a so-called sponge roller having a horizontal axis, and the outer peripheral portion thereof is in contact with the upper surface of the road surface plate 37. Further, two conveying rollers 38 are provided on the front and rear sides, and both are in contact with the upper surface of the road surface plate 37.

  The platen roller 34 and the transport roller 38 are rotatably supported by the upper cover 28. Specifically, the upper cover 28 is formed in a substantially box shape having an open bottom, and both end portions of the shafts of the rollers 34 and 38 are rotatably supported on the left and right walls of the upper cover 28. The upper cover 28 is swingably supported by the left and right vertical walls 27 with the shaft 39 of the front conveying roller 38 as a fulcrum.

  As shown in FIG. 2, when the upper cover 28 is swung upward and opened, the platen roller 34 separates upward from the thermal head 33, and the rear conveyance roller 38 separates upward from the road surface plate 37. In addition, the conveyance path 40 for the stencil sheet 17 is opened. Conversely, when the upper cover 28 is swung downward and closed, the platen roller 34 contacts the thermal head 33 and the transport roller 38 contacts the road surface plate 37. The front conveying roller 38 is in contact with the road surface plate 37 regardless of whether the upper cover 28 is opened or closed.

  The opening / closing of the upper cover 28 is detected by an upper cover opening / closing detection sensor 84 (FIG. 12). A hook member 42 with a hand lever 41 is rotatably provided inside the free end side of the upper cover 28. The hook member 42 is attached to the front and rear vertical walls 27 when the upper cover 28 is closed. The upper cover 28 is locked by engaging with the hook receiver 43 provided. The hook member 42 is detached from the hook receiver 43 by pushing the hand lever 41, and the upper cover 28 can be opened.

  The front and rear transport rollers 38 are connected by a winding conductor 44 at one end in the axial direction, and are driven to rotate in conjunction with a transport roller drive unit 45 (FIG. 12) such as a drive motor. The platen roller 34 is rotationally driven via a belt transmission mechanism 48 and a gear mechanism 49 by a platen roller drive unit 47 (FIG. 12) such as a drive motor. At least the transport roller driving unit 45 uses a stepping motor so that a rotation pulse proportional to the rotation angle is output.

  The stencil sheet 17 drawn out from the base paper container 10 passes through the transport path 40 between the platen roller 34 and the thermal head 33 and between the transport roller 38 and the road surface plate 37 by rotation of the rollers 34 and 38. 3 is transported in the transport direction X2 from left to right. Here, the conveyance roller 38 and the road surface plate 37 constitute a conveyance member for nipping and conveying the stencil sheet 17 from above and below, and the road surface plate 37 constitutes a part of the conveyance path 40 as the conveyance road surface.

  The storage unit 26 includes a suction chamber 50 disposed on the back surface side (lower side) of the road surface plate 37, and suction means 51 such as a blower connected so as to make the suction chamber 50 have a negative pressure. Yes. The suction chamber 50 includes left and right vertical walls 27, front and rear walls 53 and 52 that are installed between the left and right vertical walls 27, and a bottom wall 54. It is one constituent member constituting the upper wall. The front and rear ends of the road surface plate 37 and the upper ends of the front and rear walls 53 and 52 are spaced from each other, and the stencil sheet 17 is inserted into the suction chamber 50 through the first and second openings 55 and 56 formed by the spacing. It can be done. The suction means 51 includes a suction fan 57 (FIG. 6) and a suction fan drive unit 58 (FIG. 12) such as a drive motor, and is connected to the bottom wall 54 of the suction chamber 50.

  The plate making apparatus 11 further includes a base paper holding unit 59. The stencil holding unit 59 holds the stencil sheet 17 conveyed through the conveying path 40 in an extended state (a state without curling, wrinkling, or slack), and the suction formed on the road surface plate 37. It has a hole 60 and a suction means 51 for sucking the stencil sheet 17 to the upper surface (conveyance road surface) of the road surface plate 37 through the suction hole 60.

  FIG. 4 is a plan view of the suction holes 60 formed in the road surface plate 37. The plurality of suction holes 60 are formed in the road surface plate 37 along the width direction of the stencil sheet 17 (a direction orthogonal to the transport direction X2). It is formed in a row. The range where the suction holes 60 are formed corresponds to the entire width of the stencil sheet 17. The interval (opening pitch P) between the suction holes 60 is constant. As shown in FIG. 3, the suction hole 60 is formed between the front and rear conveying rollers 38 and is exposed by opening the upper cover 28 as shown in FIG.

  The suction means 51 is also used as the suction means 51 of the storage unit 26. Accordingly, the suction means 51 sucks the stencil sheet 17 from the suction hole 60 through the internal space of the suction chamber 50.

  The plate making apparatus 11 has the following configuration in addition to the above. FIG. 6 is a front cross-sectional view schematically showing the plate making apparatus 11. A cutting tool 61 for cutting the conveyed stencil sheet 17 is provided in front of the front conveying roller 38, and on the front side thereof, A base paper tip detection sensor 62 for detecting the tip position of the stencil paper 17 is provided. As the cutting tool 61, a rotary blade type, a guillotine type, or the like is adopted, and it is driven by a base paper cutting drive unit 63 (FIG. 12) such as a drive motor. The base paper leading edge detection sensor 62 detects the tip position of the stencil base paper 17 when the stencil base paper 17 is initially set in the plate making apparatus 11 or when the stencil base paper 17 is reset after completion of the master making. Between the platen roller 34 and the rear transport roller 38, a base paper tension detection sensor 64 (FIG. 12) is provided for detecting the tension (slackness) of the stencil sheet 17 between them.

[Configuration of Plate Feeder 13]
As shown in FIGS. 2 and 3, the plate supply device 13 includes a plate supply member 65 disposed in the suction chamber 50 and an operation mechanism 66 that operates the plate supply member 65. The plate-feeding member 65 is a flat plate disposed horizontally below the road surface plate 37 (back side of the conveyance road surface), and has a width that is substantially the same as or larger than the width of the stencil sheet 17. The left and right end portions of the plate supply member 65 are guided by front and rear guide grooves 68 formed in the left and right vertical walls 27 so as to be movable back and forth, and when moved rearward, the entire plate supply member 65 is sucked into the suction chamber 50. The distal end protrudes from the second opening 56 of the suction chamber 50 when it fits inside and moves forward.

  FIG. 5 is a perspective view showing an operation mechanism 66 that moves the plate-feeding member 65 back and forth. The operation mechanism 66 has a support bracket 69 that supports the plate-supplying member 65 at its upper end, and one end at the lower end of the support bracket 69. Is connected to the other end of the operating arm 70, and a horizontal rotating shaft 72 is connected to the other end of the rotating arm 71. ing. The upper part of the support bracket 69 passes through the guide groove 68 of the vertical wall 27.

  The rotating shaft 72 is connected to a plate feeding member driving unit 73 (FIG. 12) such as a driving motor (not shown). When the rotating shaft 72 is rotated as shown by an arrow C by the driving unit 73, an operating arm is provided. 70 moves as indicated by an arrow D, the support bracket 69 and the plate supply member 65 move as indicated by an arrow E, and the plate supply member 65 protrudes from the suction chamber 50. Further, when the rotation shaft 72 is rotated in the same direction, the operating arm 70 moves in the anti-D direction, the support bracket 69 and the plate supplying member 65 move in the counter arrow E direction, and the plate supplying member 65 moves in the suction chamber. It is designed to retreat within 50.

  The plate feeding apparatus 13 further includes a suction unit 74 including a suction chamber 50, a suction unit 51, a second opening 56, and the like. The suction portion 74 sucks the tip portion of the stencil sheet 17 protruding from the front end of the road surface plate 37 downward (in the direction crossing the transport direction X2) by the suction means 51, and the tip portion is passed through the second opening 56. 9 is inserted into the suction chamber 50 (FIG. 9), and when the plate supply member 65 protrudes from the second opening 56, the paper surface of the front end portion of the stencil sheet 17 can be locked to the plate supply member 65. I am doing so.

  As shown in FIG. 3, the front wall 53 of the suction chamber 50 has an upper end inclined obliquely upward. The upper surface of the inclined portion 75 constitutes a guide surface that guides the leading end portion of the stencil sheet 17 inserted from the second opening 56 so as to be substantially folded back (turned back 90 ° or more) in the anti-conveying direction X2. As a result, when the plate feeding member 65 is protruded, it can be surely locked to the leading end of the stencil sheet 17.

[Configuration of control means of plate making and plate feeding apparatuses 11, 13]
FIG. 12 is a block diagram showing the configuration of the control means of the plate making apparatus 11 and the plate feeding apparatus 13. The CPU 76 that controls the entire apparatus has an operation input unit 77 for an operator to give an instruction, and a control. A ROM 78 storing a program and a RAM 79 for temporarily storing data are connected.

  Further, the CPU 76 includes an upper cover open / close detection sensor 84, a base paper leading edge detection sensor 62 of the stencil paper 17, a base paper tension detection sensor 64 for detecting the tension (slack) of the stencil base paper 17, a suction fan drive unit 58, A conveyance roller driving unit 45, a platen roller driving unit 47, a base paper cutting driving unit 63, and a plate feeding member driving unit 73 are connected.

[Initial setting operation of stencil sheet 17]
Next, the operation of initially setting the stencil sheet 17 in the plate making apparatus 11 will be described with reference to FIGS. 6 to 8, FIG. 13, and FIG. 6 to 8 are front views schematically showing the plate making apparatus and the plate feeding apparatus, FIG. 13 is a flowchart of the initial setting operation of the stencil sheet roll, and FIG. 14 is the same time chart. The time chart also shows each step (step S) of the corresponding flowchart.

  In step S1, a roll of a new stencil sheet 17 is set in the base paper container 10, and in step S2, the upper cover 28 is opened as shown in FIG. Then, in step 3, the upper cover open / close detection sensor 84 (FIG. 12) detects the opening of the upper cover 28. The CPU (FIG. 12) drives the suction fan 57 based on the detection signal, and thereby the inside of the suction chamber 50 becomes negative pressure.

  In step S3, as shown in FIG. 6, the stencil sheet 17 in the stencil container 10 is pulled out, and the leading end of the stencil sheet 17 is placed at the position (manual setting position) W1 where the suction holes 60 of the road surface plate 37 are formed. Position it. At this time, since the suction means 51 is operating, the leading end of the stencil sheet 17 is sucked through the suction holes 60 and is held by suction on the upper surface of the road surface plate 37.

  In step S4, when the upper cover 28 is closed, the upper cover open / close detection sensor 84 detects this, and in step S5, the CPU 76 drives the conveying roller 38 based on the detection signal. At this time, since the platen roller 34 remains stopped, as shown in FIG. 7, when the stencil sheet 17 is loosened between the platen roller 34 and the conveying roller 38, the slack 17a is eliminated, It becomes a stretched state.

  When the tension detection sensor 64 (FIG. 12) detects the tension of the stencil sheet 17 in step S5, the CPU 76 drives the platen roller 34 based on the detection signal in step S6. As a result, the stencil sheet 17 is conveyed by both the platen roller 34 and the conveying roller 38. Since the suction means 51 is driven during this conveyance, the stencil sheet 17 is conveyed while being attracted to the upper surface of the road surface plate 37.

  In step S7, whether or not the leading end portion of the stencil sheet 17 has reached a predetermined initial setting position W2 (FIG. 8) is detected by the stencil sheet leading edge detection sensor 62. When the arrival is detected, the suction fan 57 is detected in step S8. The conveying roller 38 and the platen roller 34 are stopped, and the initial setting is completed.

  In the above initial setting operation, the leading end portion of the stencil sheet 17 drawn out from the base paper container 10 is sucked to the road surface plate 37 through the suction holes 60, so there is no curling, wrinkling, or slack. In the state, it can hold | maintain along the road surface board 37, and subsequent conveyance can also be performed favorably.

  Further, when the upper cover 28 is opened, the conveying path 40 is opened, and when the stencil sheet 17 is inserted and then the upper cover 28 is closed, the conveying roller so as to remove the slack between the platen roller 34 and the conveying roller 38. Since the operation of the platen 38 and the platen roller 34 is controlled, it is possible to prevent wrinkles and the like from being generated in subsequent conveyance.

[Operation of plate making and plate feeding devices 11 and 13 during printing]
After the stencil sheet 17 is initially set by the above operation, normal printing is performed. Hereinafter, with reference to FIGS. 8 to 11, 15, and 16, operations of the plate making apparatus 11 and the plate feeding apparatus 13 when performing normal printing will be described. 8 to 11 are front views schematically showing the plate making apparatus 11 and the plate feeding apparatus 13, FIG. 15 is an operation flowchart of the plate making and plate feeding, and FIG. 16 is the same time chart.

  As shown in FIG. 8, the stencil sheet 17 has a leading end positioned at a predetermined initial setting position W2. In step S11 of FIG. 15 and FIG. 16, when there is an operation input for starting plate making, in step S12, the suction fan 57, the conveying roller 38, and the platen roller 34 are driven, and the thermal head 33 starts heating and punching the stencil sheet 17. To do.

  In step S13, it is determined whether or not the plate has been made for a predetermined length. When the plate is made, in step S14, the driving of the conveying roller 38 is stopped. At this time, since the suction fan 57 is driven, the leading end portion of the stencil sheet 17 is sucked downward from the right end of the road surface plate 37 as shown in FIG. Inserted. By sucking the tip of the stencil sheet 17 in this way, wrinkles, slack, and curl of the tip are extended. The “predetermined length” in this case is a length necessary for the plate feeding member 65 to be locked to the stencil sheet 17 in the plate feeding operation described below.

  Whether or not the stencil sheet 17 has been made for a predetermined length is determined by detecting the rotation of the conveying roller 38. That is, a stepping motor is used for the transport roller driving unit 45 that drives the transport roller 38, and the internal counter of the CPU 76 is reset by the operation input for starting the plate making, and the rotation pulse count of the transport roller driving unit 45 is started. To do. Then, when a predetermined rotation pulse is counted, it is determined that plate making for a predetermined length has been performed, and the transport roller driving unit 45 is stopped.

  In step S 14, as shown in FIG. 10, the plate feeding device 13 is driven, and the plate feeding member 65 protrudes from the second opening 56 while being locked to the paper surface of the stencil sheet 17. The stencil sheet 17 latched by the plate feeding member 65 is inserted and clamped into the pair of clamping members 20 of the stencil mounting body 19 in the printing apparatus 12. Thereafter, in step S15, the stencil feeding member 65 is retracted, and in step S16, the transport roller 38 is driven again and the stencil mounting body 19 is rotationally driven. The

  In the plate feeding device 13, wrinkles and curls are extended by being sucked by the suction fan 57 at the front end of the stencil sheet 17. In this state, the plate feeding member 65 protrudes and is locked to the stencil sheet 17. By doing so, the stencil mounting body 19 can be supplied easily and reliably. Further, since wrinkles and the like can be removed simply by sucking the front end of the stencil sheet, a complicated structure or mechanism as in the conventional case is unnecessary, and the structure can be simplified and the cost can be reduced.

  During steps S14 and S15, the transport roller 38 is stopped, but the platen roller 34 is driven, and the thermal perforation (plate making) by the thermal head 33 is continuously performed. Therefore, the stencil sheet 17 after the plate making past the platen roller 34 is inserted into the suction chamber 50 from the first opening 55 upstream of the suction chamber 50 by the suction fan 57 as shown in FIG. It is temporarily stored in the suction chamber 50.

  The suction fan 57 (suction means 51) is used in both the base paper holding part 59 and the storage part 26 described above, and by sharing the parts, the structure can be simplified, the size can be reduced, and the cost can be reduced. It has been. The suction chamber 50 also has a function as a relay space between the suction hole 60 and the suction means 51 in the base paper holding unit 59 and a function as a storage space for the stencil base paper 17. This contributes to simplification, compactness, and cost reduction.

  Furthermore, the suction fan 57 (suction means 51) and the suction chamber 50 are also used as components of the plate feeding device 13 as described above, and further simplification and compactness of the structure can be achieved by combining these parts. Cost reduction is possible.

  Thereafter, in step S17, it is determined whether or not plate making of all images has been completed. When plate making is completed, it is determined in step S18 whether or not a predetermined length has been conveyed. When plate making of all images is completed and conveyed for a predetermined length (FIG. 11), the driving of the stencil mounting body 19, the conveyance roller 38, and the platen roller 34 is stopped in step S19. Although not shown, between steps S17 and S18, the rotation speed of the conveying roller 38 is made faster than the platen roller 34 in order to draw out the stencil sheet 17 that has been made in the suction chamber 50. Or the control of temporarily stopping the platen roller 34 and driving only the conveying roller 38 is performed.

  In step S <b> 20, the stencil sheet 17 is cut by the cutting tool 61, and in step S <b> 21, the stencil mounting body 19 is rotated and the stencil sheet 17 for one plate is mounted on the stencil mounting body 19. Thereafter, in step S22, the conveyance roller 38 and the platen roller 34 are driven again, and the stencil sheet 17 remaining on the conveyance path 40 is conveyed.

  In step S23, whether or not the leading end of the stencil sheet 17 has reached the predetermined set position W2 is detected by the stencil sheet leading edge detection sensor 62. When the arrival is detected, in step S24, the suction fan 57, the transport roller 38, The platen roller 34 is stopped. As a result, the initial set state shown in FIG. 8 is restored.

  When printing is continued, the previous stencil sheet 17 is removed by the plate discharging device 16, and then the same operation as described above is repeated.

[Modification of First Embodiment]
(1) In the first embodiment, the front end portion (tip portion) in the transport direction of the stencil sheet 17 is locked by the plate feeding member 65 and supplied to the stencil mounting body 19, and the front end portion is sandwiched by the stencil mounting body 19. However, the rear end portion in the transport direction of the stencil sheet 17 can also be supplied by the plate supply member 65 and can be sandwiched by the rear clamping member 20 ′ of the stencil mounting body 19.

  Specifically, as shown in FIG. 19, after the stencil sheet 17 is cut by the cutting tool 61 (after step 20 in FIG. 15), the stencil member 65 is advanced and the stencil sheet 17 is moved by the stencil member 65. The rear end portion 17B in the conveying direction is locked, and the rear end portion 17B is clamped by a rear clamping member 20 ′ provided on the stencil mounting body 19. At this time, the rear end of the stencil sheet 17 in the transport direction is sucked by the suction means 51 through the second opening 56, and wrinkles and slack are removed.

  Before the plate-feeding member 65 advances, a portion on the road surface plate 37 in the rear end portion 17B of the stencil sheet 17 in the conveyance direction is disposed substantially along the conveyance direction X2, and the front side of the portion is closer to the stencil mounting body 19 By intersecting the conveyance direction X2 by being pulled downward by the rotation. The intersecting portion is locked by the advancement of the plate supply member 65, and is pushed into the rear clamping member 20 '. Subsequent operations are the same as above (after step S21 in FIG. 15).

  (2) FIGS. 17 and 18 show another embodiment of the suction hole 60 in the base paper holder 59. In any of the examples, the opening ratio of the suction holes 60 is made higher at the portions corresponding to both side portions in the width direction than the portions corresponding to the center portion in the width direction of the stencil sheet 17 of the road surface plate 37.

  Specifically, in the structure shown in FIG. 17, the opening pitch of the suction holes 60 is smaller at both side portions (P2) in the width direction than at the width direction center portion (P1). In the case shown in FIG. 18, the number of the suction holes 60 per predetermined area is larger on both side portions in the width direction than on the center portion in the width direction.

  The stencil sheet 17 thus configured is most easily curled at both sides in the width direction of the tip, and by increasing the aperture ratio of the suction holes 60 corresponding to both sides in the width direction, a portion that is easily curled is formed. It is because it can hold more reliably. The aperture ratio can be changed by changing the hole size of the suction hole 60.

  (3) In the above-described embodiment, the stencil mounting body 19 of the printing apparatus 12 is shown as having a double cylinder type (double cylinder type), but may be a single cylinder type.

  (4) The conveying unit 25 conveys the stencil sheet 17 between the conveying roller 38 as a pair of conveying members and the road surface plate 37, but the lower side is separated from the road surface plate 37. A transport roller may be provided, and the stencil sheet 17 may be sandwiched and transported by upper and lower transport rollers.

  (5) The suction holes 60 of the stencil sheet holding portion 59 are not limited to be provided corresponding to the entire width of the stencil sheet 17, but may be provided corresponding to only both sides in the width direction.

[Second Embodiment]
21 to 42 show a second embodiment of the present invention. FIG. 21 is a side sectional view schematically showing a stencil printing machine according to the second embodiment. The stencil printing machine includes an image reading device 8, a plate making device 11, a printing device 12, and a plate feeding device 13. The apparatus main body 9 includes a paper feeding device 14, a paper discharge device 15, a plate discharging device 16, and the like. These basic configurations are the same as those in the first embodiment. Hereinafter, the configuration of the printing device 12, the plate making device 11, the plate feeding device 13, and the plate discharging device 16 of the present embodiment will be described in detail. In addition, the same code | symbol is attached | subjected about the structure same as 1st Embodiment.

[Configuration of printing device]
22 is a side sectional view of the stencil mounting body 19, FIG. 23 is a perspective view of the stencil mounting body 19 as viewed from the front obliquely above, and FIG. 24 is a perspective view showing the top of the stencil mounting body 19 and the clamp opening / closing mechanism 134. It is. The printing apparatus 12 includes a stencil mounting body 19, and the stencil sheet 17 supplied by the plate feeding apparatus 13 is wound around the outer peripheral surface of the stencil mounting body 19. The stencil mounting body 19 is of a double cylinder type as in the first embodiment, but its configuration is slightly different.

  The stencil mounting body 19 includes an upper rotating roller 119, a lower ink roller 120, an auxiliary roller 121 disposed in front of the ink roller 120, and a triangle extending over these three rollers 119, 120, 121. A mesh-shaped screen 122 or the like wound around the shape is included. A pressure roller 123 (FIG. 1) is opposed to the lower ink roller 120 from below so as to be freely contactable. Printing is performed on the printing paper 114 between the ink roller 120 and the pressing roller 123. An ink supply mechanism 124 is provided in a triangular space surrounded by the screen 122.

  As shown in FIG. 23, the rotating roller 119, the ink roller 120, and the auxiliary roller 121 are rotatably supported by a pair of left and right support plates 125 at both end shaft portions. The ink roller 120 is linked to a rotation drive unit 91 (FIG. 37) such as an electric motor via a power transmission mechanism (not shown), and rotates in the direction of arrow R. Timing gears 119A, 120A, and 121A are fixed to both end shaft portions of the rollers 119, 120, and 121, respectively, and a timing belt 127 is wound around the timing gears. As the ink roller 120 is driven to rotate, the other rollers 119 and 121 are simultaneously rotated via the timing belt 127 so that the screen 122 rotates in the arrow Y direction. The stencil mounting body 19 is locked in a stopped state by a lock mechanism 92 (FIG. 37).

  The stencil mounting body 19 is provided with front and rear clamping tools 128A and 128B at intervals in the rotational direction (circular direction of the screen 122), and the front and rear clamping tools 128A and 128B are mounted on the outer peripheral surface of the screen 122. The front end portion and the rear end portion in the transport direction 17 are each gripped. As shown in FIGS. 22 and 24, each clamp tool 128 </ b> A, 128 </ b> B includes a fixed clamp member 129, a swing shaft 130, and a movable clamp member 131. The fixed clamp member 129 is installed on the left and right timing belts 127, and the swing shaft 130 is rotatably supported on the rear side in the rotational direction Y of the stencil mounting body 19 with respect to the fixed clamp member 129. The movable clamp member 131 is fixed to the swing shaft 130. The clamp tools 128 </ b> A and 128 </ b> B can be opened and closed by swinging the movable clamp member 131 around the axis of the swing shaft 130.

  A magnet plate 132 is provided on the surface of the movable clamp member 131 facing the fixed clamp member 129, and the magnets 132 are attracted to the fixed clamp member 129 so that the clamp tools 128A and 128B are kept closed. It has become. The swing shaft 130 of the movable clamp member 131 is provided with a return spring 133 that biases the movable clamp member 131 in the opening direction. The elastic force of the return spring 133 is larger than the attractive force of the magnet plate 132. The return spring 133 assists the opening operation of the clamp tools 128A and 128B by the clamp opening / closing mechanism 134 described later.

  FIG. 22 shows a state in which the stencil sheet 17 is mounted on the stencil mounting body 19, and the stencil sheet 17 is wound over most of the outer peripheral surface of the stencil mounting body 19. The front end portion 17A of the stencil sheet 17 is gripped by the front clamp tool 128A so as to be folded back from the front end of the movable clamp member 131 to the swing shaft 130 side.

  The top portion of the stencil mounting body 19 is set as a reference position Z, and a state where the front clamp tool 128A is located at the reference position Z is a home position. Therefore, in a non-operating state such as waiting for printing, the rotation of the stencil mounting body 19 is controlled so that the front clamp tool 128A is positioned at the reference position Z. Further, the stencil mounting body 19 is configured to be detachable from the apparatus main body 9 (FIG. 21) in the left-right direction (the through direction in FIG. 21). Only possible when placed.

  As shown in FIG. 24, the reference position Z is provided with a clamp opening / closing mechanism 134 that opens and closes the front and rear clamp tools 128A and 128B. The clamp opening / closing mechanism 134 includes a lever member 136, an engagement pin 137, an arm member 138, a power transmission mechanism 139, and a clamp opening / closing drive unit 94 (FIG. 37). The lever member 136 is provided at one end of the swing shaft 130, and the engagement pin 137 protrudes from the tip end of the lever member 136. The arm member 138 is rotatably provided on the apparatus main body 9 side, and can be detachably engaged with the engagement pin 137. The clamp opening / closing drive unit 94 is configured by an electric motor or the like, and drives the arm member 138 via a power transmission mechanism 139 such as a belt transmission mechanism. The arm member 138 and the engagement pin 137 are engaged when the front and rear clamp tools 128A and 128B are arranged at the reference position Z, and swing by rotating the arm member 138 by the clamp opening / closing drive unit 94. The movable clamp member 131 swings about the shaft 130 as a fulcrum, and the clamp tools 128A and 128B are opened and closed. FIG. 37 is a block diagram showing the configuration of the control means.

[Configuration of plate making equipment]
FIG. 25 is a perspective view of the plate making apparatus and the plate feeding apparatus, and FIG. 26 is a side sectional view of the same. As in the first embodiment, the plate making apparatus 11 includes an apparatus frame 22, a base paper storage unit 10, a plate making unit 24, a transport unit 25, and a storage unit 26. An arrow X2 in FIG. 26 indicates the transport direction of the stencil sheet 17 in the plate making apparatus 11, and is the same direction as the transport direction X1 of the printing paper 114 in FIG.

  The plate making apparatus 11 of this embodiment is different from the plate making apparatus 11 of the first embodiment in the following points. That is, in this embodiment, as shown in FIG. 26, a guide roller 166 is attached to the platen roller 34, and the stencil sheet 17 that has been subjected to platemaking passes between the platen roller 34 and the guide roller 166 and is on the side of the conveying roller 38. Has been sent to. The cutting tool 61 is disposed between the front and rear transport rollers 38. Therefore, the cut stencil sheet 17 is pressed by the conveying rollers 38 and 38 on both sides in front and behind the cut. As shown in FIG. 26, the front end portion of the road surface plate 37 constituting the upper wall of the suction chamber 50 is bent in an L shape downward and rearward, and the upper end of the front wall 53 is bent forward. A second opening 56 is formed between them. Therefore, the second opening 56 is disposed at a position lower than the conveyance path 40 than in the first embodiment. Since other points are the same as those in the first embodiment, a detailed description thereof will be omitted.

[Configuration of plate feeder]
FIG. 27 is a side view showing the plate feeding apparatus. Similarly to the first embodiment, the plate feeding device 13 includes a plate feeding member 65 disposed in the suction chamber 50 and an operating mechanism 66 that operates the plate feeding member 65. The plate supplying member 65 is a flat plate material that is disposed substantially horizontally below the road surface plate 37 (on the back side of the conveying road surface), and has a width that is substantially the same as or larger than the width of the stencil sheet 17.

  The operation mechanism 66 includes a support 181 that supports the plate feeding member 65 at the upper end, an operation arm 182 that has a front end fixed to the lower end of the support 181, and one end that is rotatable at the rear end of the operation arm 182. A pivot arm 183 connected to the other end of the pivot arm 183, and a pivot shaft 184 in the left-right direction coupled to the other end of the pivot arm 183. The support 181, the actuating arm 182, the rotating arm 183, and the rotation shaft 184 are disposed outside the left and right vertical walls 27, and the support 181 and the plate feeding member 65 are through holes 185 formed in the vertical wall 27. It is connected through.

  In the present embodiment, unlike the first embodiment, the front side of the operating arm 182 is supported from below by a receiving member 186. The receiving member 186 is formed of a columnar rod that protrudes outward from the left and right vertical walls 27.

  The rotation shaft 184 is connected to an advance / retreat drive unit 73 (FIGS. 12 and 37) such as an electric motor, and the advance / retreat drive unit 73 rotates the rotation shaft 184 counterclockwise as indicated by an arrow C. As a result, the plate feeding member 65 moves back and forth via the rotating arm 183, the operating arm 182 and the support 181. When the plate feeding member 65 moves rearward, the whole is accommodated in the suction chamber, and when moved forward, the tip protrudes from the second opening 56 of the suction chamber 50.

  Since the operating arm 182 is supported from below by the receiving member 186, the plate feeding member 65 moves up and down as it moves back and forth, and the tip end portion rotates clockwise as indicated by arrow D in FIG. It draws a substantially elliptical trajectory. Therefore, the plate supply member 65 protrudes from the second opening portion 56 from the maximum retracted position (solid line in FIG. 27) in a substantially horizontal posture, which is accommodated in the suction chamber 50, with the tip thereof facing obliquely upward. When it becomes, it returns to a substantially horizontal posture again. Then, it retracts from the maximum projecting position while directing the tip obliquely downward, and when it reaches the maximum retracted position, it returns to a substantially horizontal posture again.

  Further, the plate feeding apparatus 13 includes a suction unit 74 configured by a suction chamber 50, a suction means 51, a second opening 56, and the like, as in the first embodiment. As shown in FIG. 26, the suction section 74 sucks the transport direction front end 17A of the stencil sheet 17 protruding from the front end of the road surface plate 37 downward (in the direction crossing the transport direction X2) by the suction means 51, and Further, the suction chamber 50 is inserted through the second opening 56. At this time, a cover plate 188 that covers the upper side of the second opening 56 is provided at the front end of the road surface plate 37 so that the front end portion 17A of the stencil sheet 17 is sucked to the lower side of the plate feeding member 65. Yes. The cover plate 188 is formed of a plastic thin plate or the like and has flexibility, so that the cover plate 188 bends even if it collides when the plate feeding member 65 protrudes from the second opening 56.

[Configuration of plate removal equipment]
As shown in FIG. 21, the plate discharging device 16 includes a pair of plate discharging rollers 140, a take-up roller 141, and the like, and the plate discharging roller 140 is operated by a rotation driving unit 93 (FIG. 37) such as an electric motor. The plate discharging device 16 receives the used stencil paper 17 mounted on the stencil mounting body 19 and draws it into the plate discharging device 16 by the plate discharging roller 140 and winds it up as a plate discharging roll.

  As shown in FIG. 35, the upper discharge roller 140 is provided with a plurality of scraping claws 142 formed of an elastic material such as rubber radially in part in the axial direction. 142 makes it easy to take the stencil sheet 17 between the pair of discharge rollers 140.

  The plate removal device 16 includes a plate removal detection sensor 95 (FIG. 37), which detects whether or not the stencil sheet 17 is taken in between the pair of plate discharge rollers 140.

[Initial setting operation of stencil paper]
Next, the operation of initially setting the stencil sheet 17 in the plate making apparatus 11 will be described with reference to FIGS. 28 and 29 are side cross-sectional views schematically showing the plate making, plate feeding, printing, and plate discharging apparatuses. The flow of operation is the same as that of the first embodiment described with reference to FIGS.

  First, when a roll of a new stencil sheet 17 is set in the base paper container 10 and the upper cover 28 is opened as shown in FIG. 28, the suction means 51 is activated, and the suction chamber 50 is negatively pressurized.

  The stencil sheet 17 in the stencil sheet storage unit 10 is manually pulled out, and the front end portion 17A of the stencil sheet 17 is positioned at the position (manual setting position) W1 of the road surface plate 37 where the suction holes 60 are formed. At this time, since the suction means 68 is operated, the front end portion of the stencil sheet 17 is sucked through the suction holes 60 and is held by suction on the upper surface of the road surface plate 37.

  Then, as shown in FIG. 29, when the upper cover 28 is closed, the transport roller 38 and the platen roller 34 are operated, and the stencil sheet 17 is transported by both the platen roller 34 and the transport roller 38. Since the suction means 51 is operating during this conveyance, the stencil sheet 17 is conveyed while being attracted to the upper surface of the road surface plate 37.

  Whether or not the front end portion 17A of the stencil sheet 17 has reached a predetermined initial setting position W2 (FIG. 29) is detected by the stencil sheet leading edge detection sensor 62. When arrival is detected, the suction means 51, the transport roller 38, and the platen roller 34 are stopped, and the initial setting is completed.

  In the above initial setting operation, the front end portion 17A of the stencil sheet 17 drawn out from the base paper container 10 is adsorbed to the road surface plate 37 through the adsorbing holes 60. It can be held along the road surface plate 37 in a non-existent state, and the subsequent conveyance can be performed well.

[Operation of each device during initial printing]
After the stencil sheet 17 is initially set by the above operation, normal printing is performed. Hereinafter, with reference to FIG. 30 to FIG. 34, operations of the plate making apparatus 11, the plate feeding apparatus 13, and the printing apparatus 12 when performing printing after initial setting (initial printing) will be described. 30 to 34 are side cross-sectional views schematically showing plate making, plate feeding, printing, and plate discharging apparatuses. The flow of operation is substantially the same as that of the first embodiment described with reference to FIGS. 15 and 16, but the rear end 17B in the conveying direction of the stencil sheet 17 is held by the rear clamp tool 128B of the stencil mounting body 19. Add motion.

  Initially, the front end portion 17A of the stencil sheet 17 is positioned at a predetermined initial setting position W2 (FIG. 29), and when there is an operation input for starting plate making, the suction means 51, the transport roller 38, and the platen roller 34 are driven. Then, heat punching of the stencil sheet 17 is started in the thermal head 33.

  When the stencil sheet 17 is made for a predetermined length, the conveying roller 38 stops. At this time, since the suction means 51 is operating, the front end portion 17A of the stencil sheet 17 is sucked downward from the front end of the road surface plate 37 as shown in FIG. Inserted into the suction chamber. By sucking the front end portion 17A of the stencil sheet 17 in this way, wrinkles, slackening, and curling of the front end portion are extended. In this case, the “predetermined length” of the stencil sheet 17 is a length necessary for the stencil member 79 to be locked to the stencil sheet 17 in the stencil feeding operation described below.

  Whether or not the stencil sheet 17 has been made for a predetermined length is determined by detecting the rotation of the conveying roller 38. That is, a stepping motor is used for the transport roller driving unit 45 (FIG. 12) for driving the transport roller 38, and the internal counter of the CPU 76 is reset by an operation input for starting plate making, and the rotation pulse of the transport roller driving unit 45 is rotated. Start counting. Then, when a predetermined rotation pulse is counted, it is determined that plate making for a predetermined length has been performed, and the transport roller driving unit 45 is stopped.

  Next, the plate-feeding member advancing / retreating drive unit 73 (FIGS. 12 and 37) of the plate-feeding device 13 is driven, and the plate-feeding member 65 is engaged with the second surface of the stencil sheet 17 as shown in FIG. Project from the opening 56. The stencil sheet 17 locked to the plate supply member 65 is inserted into the front clamp tool 128A that is positioned in the reference position Z and opened by the clamp opening / closing mechanism 134 (FIG. 24). Thereafter, the plate-feeding member 65 is retracted, the front clamp tool 128A is closed, the transport roller 38 is driven again, and the stencil mounting body 19 is rotationally driven. As shown in FIG. It is wound around the outer peripheral surface of the stencil mounting body 19.

  In the plate feeder 13, the front end portion 17A of the stencil sheet 17 is sucked by the suction fan 57 so that wrinkles and curls are extended, and is directed in a direction intersecting the transport direction X2. The plate feeding member 65 protrudes and is locked to the stencil sheet 17 so that it can be supplied to the stencil mounting body 19 easily and reliably. Further, since wrinkles and the like can be removed only by sucking the front end portion 17A of the stencil sheet 17, a complicated structure or mechanism is unnecessary, and the structure can be simplified and the cost can be reduced.

  Further, as shown in FIG. 27, the plate feeding member 65 moves so as to place the stencil sheet 17 from above with respect to the fixed clamp member 129 because the tip portion moves while drawing a substantially elliptical locus D. Therefore, the stencil sheet 17 can be reliably delivered without the plate feeding member 65 colliding with the tip of the fixed clamp member 129.

  As shown in FIG. 31, while the plate feeding member 65 is moved back and forth, the transport roller 38 is stopped, but the platen roller 34 is driven, and the thermal perforation (plate making) by the thermal head 33 is continuously performed. . For this reason, the stencil sheet 17 after the plate making past the platen roller 34 is inserted into the suction chamber 50 from the first opening 55 on the upstream side of the suction chamber 50 by the suction means 51, and temporarily enters the suction chamber 50. It is stored in.

  The suction means 51 is used in both the base paper holding portion 59 and the storage portion 26 described above, and simplification of the structure, compactness, and cost reduction are achieved by sharing the parts. The suction chamber 50 also has a function as a relay space between the suction hole 60 and the suction means 51 in the base paper holding unit 59 and a function as a storage space for the stencil base paper 17. This contributes to simplification, compactness, and cost reduction.

  Furthermore, the suction means 68 and the suction chamber 50 are also used as components of the plate feeding device 13 as described above, and it is possible to further simplify the structure, reduce the size, and reduce the cost by combining these parts. It has become.

  When the stencil printing of all images is completed and the stencil sheet 17 is conveyed by a predetermined length, the driving of the stencil mounting body 19, the conveying roller 38, and the platen roller 34 is stopped. As shown in FIG. 33, the stencil mounting body 19 is stopped with the rear clamp tool 128B disposed at the reference position Z and locked by the lock mechanism 92. The rear clamp tool 128B is clamped by a clamp opening / closing mechanism 134 (FIG. 24). Is released by.

  During the plate making process, the rotation speed of the transport roller 38 is made faster than the platen roller 34 in order to draw out the pre-made stencil sheet 17 stored in the suction chamber 50 from the first opening 55 or temporarily. For example, the control of stopping the platen roller 34 and driving only the conveying roller 38 is appropriately performed.

  Thereafter, the stencil sheet 17 is cut by the cutting tool 61. The pre-made stencil sheet 17 in front of the cut portion has a portion on the road surface plate 37 arranged along the transport direction X2 at the rear end portion 17B of the transport direction X2, and the front portion thereof is rotated by the stencil mounting body 19 Is pulled downward due to the crossing direction with respect to the transport direction X2. Then, the platen roller 34 and the transport roller 38 are driven after the stencil sheet 17 is cut, whereby the rear end of the stencil sheet 17 is transported forward of the front transport roller 38, as shown in FIG. The rear end portion 17B of the stencil sheet 17 is supplied to the rear clamp tool 128B at the reference position Z by the protrusion of the plate supply member 65. The stencil sheet 17 remaining on the transport path 40 is transported until the front end reaches the initial setting position W2.

  The rear end portion 17B of the stencil sheet 17 locked to the plate supply member 65 is sucked to the suction chamber 50 side by the suction means 51 through the second opening portion 56, whereby wrinkles and curls are stretched. And is held by the rear clamp portion 128B in an appropriate state.

  Thereafter, printing is performed on the printing paper 114 by using the stencil sheet 17 mounted on the stencil mounting body 19, and after the printing is completed, the stencil mounting body 19 holds the front clamp tool 128A as shown in FIG. It waits in the state arrange | positioned in the reference position Z.

  In the above, the stencil sheet 17 is mounted on the stencil mounting body 19 with the front and rear ends of the stencil sheet 17 being gripped by the front and rear clamping tools 128A and 128B. Even the stencil sheet 17 having a low waist can be properly mounted without wrinkles or slack.

[Operation of each device during the next and subsequent printing]
Next, with regard to the operation of each apparatus during the next printing after the first printing as described above, in particular, the used stencil sheet 17 is discharged and a new stencil sheet 17 is placed on the stencil mounting body 19. The operation of plate feeding and mounting will be described.

  FIG. 37 is a block diagram showing the configuration of the control means, but the configuration connected to the CPU 76 is omitted from the description of the first embodiment with reference to FIG. It shows excerpts related to the plate feeding operation. The CPU 76 includes a rotation driving unit 91 of the stencil mounting body 19, a rotation lock mechanism unit 92 of the stencil mounting body 19, a rotation driving unit 93 of the pair of plate discharging rollers 140, a driving unit 94 of the clamp opening / closing mechanism 134, a plate discharging detection sensor 95, The advance / retreat drive unit 73 of the plate supply member 65 is connected to each other.

  35 and 36 are side cross-sectional views schematically showing the plate making, plate feeding, printing, and plate discharging apparatuses, FIG. 38 is a flowchart of the plate discharging / plate feeding operation, and FIG. 39 is the same time chart. . The time chart also shows each step (step S) of the corresponding flowchart.

  In step S1, the stencil mounting body 19 is rotated so that the front clamp tool 128A is disposed at the reference position Z, and the stencil mounting body 19 is locked by the lock mechanism 92 at this position.

  In step S2, the discharge roller 140 is driven to rotate, and at the same time, the clamp opening / closing mechanism 134 is driven. As a result, as shown in FIG. 35, the front clamp tool 128A waiting at the reference position Z is opened. Then, the front end portion of the movable clamp member 131 comes into contact with the lower plate discharge roller 140 on the lower side of the plate release device 16, and the stencil sheet 17 that is hooked on the front end of the movable clamp member 131 is scraped by the pair of plate discharge rollers 140. Captured in between.

  After a predetermined time has elapsed since the front clamp tool 128A was opened (step S3), it is determined in step S4 whether or not the plate ejection detection sensor 95 is ON. If it is ON, the process proceeds to step S4 and remains OFF. In this case, it is determined that the stencil sheet 17 has not been pulled in between the stencil rollers 140, and evacuation failure processing is performed.

  On the other hand, in the plate making apparatus 11, plate making work is performed in the same procedure as the above-mentioned initial printing (FIGS. 29 and 30). In step 5, the driving of the pair of discharge rollers 140 is temporarily stopped, and as shown in FIG. 31, the plate feeding member 65 is advanced and the front end portion of the stencil sheet 17 locked to the plate feeding member 65 is in front. It is supplied to the clamp tool 128A.

  Thereafter, by closing the front clamp tool 128A by the clamp opening / closing mechanism 134, the front end portion of the stencil sheet 17 is gripped by the front clamp tool 128A, the stencil mounting body 19 is unlocked and rotated, and the discharge roller 140 is driven again. To do. As a result, the new stencil sheet 17 is wound around the outer periphery of the stencil mounting body 19 as shown in FIGS. 32 and 33 while the used stencil sheet 17 is pulled in by the pair of discharge rollers 140.

  In step S6, when the rear clamp tool 128B reaches the reference position Z, the stencil mounting body 19 is stopped and locked by the lock mechanism 92, and at the same time, the plate discharge roller 140 is temporarily stopped. Then, as shown in FIG. 36, the rear clamp tool 128B is opened by the clamp opening / closing mechanism 134, and at the same time, the discharge roller 140 is driven to rotate, whereby the used stencil sheet 17 held by the rear clamp tool 128B is removed. The rear end portion 17B is discharged by the plate discharge roller 140.

  After a predetermined time (step S8), it is determined in step S9 whether or not the discharged plate detection sensor 95 has been turned off, that is, whether or not the entire used stencil sheet 17 has been discharged. If the stencil sheet 17 remains ON, it is determined that the stencil sheet 17 is stopped between the stencil rollers 140, and a stencil failure process is performed.

  In step S10, the plate discharging roller 140 is stopped after rotating for a predetermined time, the plate feeding member 65 is protruded, and the rear end portion of a new stencil sheet 17 is supplied to the rear clamp tool 128B. Then, by closing the rear clamp tool 128B by the clamp opening / closing mechanism 134, the rear end portion 17B of the stencil sheet 17 is gripped, the rotation lock of the stencil mounting body 19 is released, and the plate discharging / plate feeding operation is completed.

  As described above, in order to discharge the used stencil sheet 17 from the stencil mounting body 19 and complete the mounting of the new stencil sheet 17, the front clamp tool 128A is placed in the reference position Z and the rear clamp tool 128B is used. The stencil mounting body 19 has only to be rotated about once until the stencil is disposed at the reference position Z, so that the plate removal / plate feeding operation can be performed in a short time.

  Since the front clamp tool 128A and the rear clamp tool 128B are opened and closed only at the reference position Z, it is sufficient to provide one clamp release mechanism 134 at the reference position Z, and the stop position of the stencil mounting body 19 is also Since only two positions in the case where the front clamp tool 128A and the rear clamp tool 128B are arranged at the reference position Z need to be considered, simple rotation control is possible.

[Modification of Second Embodiment]
(1) In the above embodiment, in the plate discharge / plate feeding operation, the front clamp tool 128A is opened, the used stencil sheet 17 is drawn by the plate discharge roller 140, and a new stencil sheet 17 is supplied to the front clamp tool 128A. However, the withdrawal of the discharge roller 140 and the supply of the stencil sheet may be performed simultaneously.

  (2) The stencil mounting body 19 is not limited to the one having the triangular shape as described above, and is a twin-bottle type in which a screen 122 is wound between a rotating roller 119 and an ink roller 120 as shown in FIG. As shown in FIG. 41, a single cylinder type can be substituted.

  (3) Further, as shown in FIG. 42, a plurality of stencil mounting bodies 19 can be provided in parallel. In this case, one set of the plate making apparatus 11, the plate feeding apparatus 13, and the plate discharging apparatus 16 can be configured to be movable between the stencil mounting bodies 19. For example, by providing a plurality of stencil mounting bodies 19 having inks of different colors, various printing is possible, and each stencil plate is moved by moving a set of plate making apparatus 11, plate feeding apparatus 13 and plate discharging apparatus 16. Compared with a case where a plate making apparatus or the like corresponding to the mounting body 19 is provided, the complexity of the structure can be minimized.

  (4) In the above plate discharging / plate feeding operation, when the plate discharging device 16 receives the rear end portion 17B in the transport direction of the used stencil sheet 17 from the rear clamp tool 128B, the rear clamp tool 128B is closed at the reference position Z. (Before opening), the gripped stencil sheet 17 may be peeled off from the rear clamp tool 128B by the rotation of the discharge roller 40.

  (5) In the above plate discharging / plate feeding operation, the position of the rear clamp tool 128B when the plate discharging device 17 receives the rear end portion 17B in the transport direction of the stencil sheet 17 from the rear clamp tool 128B is other than the reference position Z. You can also. That is, as shown in FIG. 35, after discharging the used stencil sheet 17 to the front clamp tool 128A and supplying a new stencil sheet 17, the stencil mounting body 19 rotates in the arrow Y direction, and FIG. As shown, the rear clamp tool 127B is arranged at the reference position Z, but the stencil sheet 17 is transferred from the rear clamp tool 128B to the plate discharging device 16 until the rear clamp tool 28B reaches the reference position Z. Also good. In this case, for example, the retracting speed of the plate discharging device 16 (rotational speed of the plate discharging roller 140) is increased between a short time before the rear clamp tool 128B reaches the reference position Z and the reference position Z, and the closed clamp device 128B is closed. The stencil sheet 17 can be peeled off from the rear clamp tool 128B. Therefore, the stencil sheet 17 can be discharged from the rear clamp tool 128B without stopping the stencil mounting body 19.

(6) The rear clamp tool 128B does not require a larger gripping force than the front clamp tool 128A, and the front clamp tool 128A and the rear clamp tool 128B do not have to have the same gripping force. Accordingly, when the stencil sheet 17 is peeled off from the clamp device 128B after being closed and discharged as in (4) and (5) above, the grip force is adjusted so that the back clamp device 128B can be peeled off. Therefore, it is desirable to deliver the stencil sheet to the plate discharging apparatus without applying excessive force.
[Other Embodiments]
A part (including a modification) of one configuration of the first and second embodiments can be adopted for the other.

  The present invention can be effectively used mainly as a stencil printing machine using a stencil sheet of a single film.

It is side surface sectional drawing which shows typically the stencil printing machine provided with the plate feeding apparatus which concerns on 1st Embodiment of this invention. It is a perspective view of a plate making apparatus and a plate feeding apparatus. FIG. It is a top view of the suction hole formed in the road surface board (conveyance road surface). It is a perspective view which shows the action mechanism which moves a plate supply member. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is side surface sectional drawing which shows a plate making apparatus and a plate feeding apparatus typically. It is a block diagram which shows the structure of the control means of plate making and a plate feeding apparatus. It is a flowchart of the initial setting operation | movement of a stencil paper roll. It is the same time chart. It is an operation | movement flowchart of plate making and plate feeding. It is the same time chart. It is a top view of the suction hole formed in the road surface board (conveyance road surface) concerning the modification of a 1st embodiment. It is a top view of the suction hole formed in the road surface board (conveyance road surface) concerning the modification of a 1st embodiment. It is side surface sectional drawing which shows typically the platemaking, plate feeding, and printing apparatus which concern on the modification of 1st Embodiment. It is side surface sectional drawing of the plate feeding apparatus which concerns on a prior art. It is side surface sectional drawing which shows typically the stencil printing machine which concerns on 2nd Embodiment of this invention. It is side surface sectional drawing of a stencil mounting body. It is the perspective view which looked at the stencil mounting body from the front diagonally upward. It is a perspective view which shows the top part of a stencil mounting body, and a clamp opening / closing mechanism. It is a perspective view of a plate making apparatus and a plate feeding apparatus. FIG. It is a side view which shows the action mechanism of a plate feeding member. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is side surface sectional drawing which shows typically each apparatus of plate-making, plate feeding, printing, and plate removal. It is a block diagram which shows the structure of a control means. It is a flowchart of a plate removal / plate feeding operation. It is a time chart of plate removal / plate feeding operation. It is side surface sectional drawing which shows typically the stencil printing machine concerning the modification of 2nd Embodiment. It is side surface sectional drawing which shows typically the stencil printing machine concerning the modification of 2nd Embodiment. It is side surface sectional drawing which shows typically the stencil printing machine concerning the modification of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Plate making apparatus 12 Printing apparatus 13 Plate feeding apparatus 17 Stencil base paper 19 Stencil mounting body 37 Road surface board 50 Suction chamber 51 Suction means 56 2nd opening part 60 Adsorption hole 65 Plate feeding member

Claims (4)

A stencil sheet fed by a plate making apparatus and fed to a stencil mounting body of a printing apparatus ;
Oite the stencil printing machine comprising a clamp opening and closing mechanism for opening and closing the clamp fixture of the stencil sheet, and
A clamping device is rotatably provided on the stencil mounting body,
The stencil sheet is provided so as to be able to advance and retreat in the conveying direction of the stencil sheet by the plate making apparatus and is locked to the end of the stencil sheet which is bent in the direction intersecting the conveying direction when advanced. A stencil feeding device is provided with a stencil feeding member for supplying base paper to the stencil mounting body ,
The plate-feeding member that holds the stencil sheet advances from above to place the stencil sheet on the clamp tool with the stencil mounting body opened,
A stencil printing machine , wherein a stencil sheet is retracted after a stencil sheet is sandwiched between stencil mounting bodies by a clamp opening / closing mechanism closing a clamp . The stencil printing machine according to claim 1, further comprising suction means for bending an end portion of the stencil sheet in a direction intersecting the transport direction by suction. The plate making apparatus has an adsorption hole formed on the conveyance path surface of the stencil sheet, and an opening into which the stencil sheet can be inserted downstream of the adsorption hole in the conveyance direction. A suction chamber provided on the back side,
The suction means is connected to the suction chamber so as to create a negative pressure in the suction chamber in order to suck the stencil sheet on the conveyance path surface through the suction hole;
The stencil feeding member is configured to lock an end of the stencil sheet sucked into the suction chamber from the opening by the suction means and to supply the stencil mounting body. Stencil printing machine . The stencil printing machine according to claim 1 , wherein the stencil feeding member is configured to lock a rear end portion in the conveying direction of the stencil sheet and to supply the stencil mounting body .

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