JP2009034900A - Master recovery device in stencil printing machine - Google Patents

Abstract

There is provided a master recovery device capable of evenly folding a master removed from a plate cylinder over the entire length in the width direction.
A storage box 43 for storing a master transported from a plate cylinder 13 in a stencil printing apparatus 1 is disposed at an entrance of the storage box 43, and the master from the plate cylinder 13 is placed in the storage box 43. A master feeding means 45 for feeding into the housing box, a plurality of ribs 75 for supporting the master immediately after being fed into the housing box 43 by the master feeding means 45, and the master fed into the housing box 43 are compressed. The plurality of ribs 75 supporting the master are provided with low friction ribs 75A and 75B having a small frictional resistance between the master and the rib 75, and the low friction ribs 75A and 75B serve as the master. The supporting surface 77 for supporting is formed so that the other ribs 75 are lower than the supporting surface 77 for supporting the master.
[Selection] Figure 2

Description

  The present invention relates to a master recovery device for recovering a master (printing stencil sheet) conveyed from a plate cylinder in a stencil printing device, and more particularly, to the master in a storage box provided in the master recovery device. Can be achieved, the frictional resistance can be equalized over the entire width direction of the master, and the master can be properly folded in the storage box. The present invention relates to a master recovery apparatus that can accommodate more masters.

In the stencil printing apparatus, a stencil sheet (master) for printing is mounted on the outer peripheral surface of a rotatable cylindrical plate cylinder, and after the appropriate number of sheets have been printed, the master is removed from the plate cylinder and the stencil is removed. The master is collected in a master collection device (see, for example, Patent Document 1).
JP-A-8-142484

  As shown schematically in FIG. 5, the master recovery apparatus 101 described in Patent Document 1 includes a storage box 105 for storing a master (stencil paper) 103, and is provided at the entrance side of the storage box 105. Includes a master feeding means 107 for feeding a master from a plate cylinder (not shown) into the storage box 105. The master feeding means 107 includes a plate discharging roller (feeding roller) 109 that forms a pair of upper and lower portions that can sandwich the master from above and below to feed the master from the plate cylinder into the storage box 105.

  A plurality of the discharge rollers 109 are provided at appropriate intervals in the width direction of the master from the plate cylinder (direction perpendicular to the paper surface in FIG. 5). A plurality of ribs 111 for supporting the master immediately after being fed into the storage box 105 by the plate discharging roller 109 are provided so as to protrude into the storage box 105. The plurality of ribs 111 are provided at appropriate intervals in the width direction of the master (a direction perpendicular to the paper surface), and the support portions (support surfaces) 113 that each rib 111 supports the master are located inside the storage box 105. It is inclined so as to gradually become lower and is formed so as to be in contact with a virtual same inclined plane.

  Further, the master recovery apparatus 101 is provided with a compression means 115 for compressing the master 103 carried into the storage box 105 by the plate discharge roller 109. The compression means 115 includes a compression plate 119 supported on the base side by a rotating shaft 117 provided above the storage box 105. The compression plate 119 is wide in the longitudinal direction of the rotating shaft 117, and a plurality of drawing claws 121 are provided at appropriate intervals in the direction perpendicular to the paper surface on the tip side.

  The plurality of pulling claws 121 can pass between the plurality of discharging rollers 109 and between the plurality of ribs 111 in the vertical direction, and by rotating from a position indicated by a solid line to a position indicated by an imaginary line in the drawing. The master on the rib 111 is drawn into the storage box 105 and compressed. Since the master recovery apparatus 101 is known from Patent Document 1, a more detailed description of the configuration of the master recovery apparatus 101 and a description of the operation are omitted.

  In the master recovery apparatus 101 as described above, the master 103 in the storage box 105 is compressed by the compression plate 119 in the compression means 115, and the compression is performed when the compression plate 119 rotates (returns up) to the original position above. In addition, the master 103 swells, and the master 103 tends to rise due to adhesion (sticking) to the compression plate 119. However, since the rise of the master 103 is prevented by the plurality of ribs 111, the recovery of the master 103 into the storage box 105 can be performed satisfactorily.

  By the way, in the master collecting apparatus 101 as described above, when the master from the plate cylinder is sent into the storage box 105 by the plate discharging roller 109, the master immediately after being sent by the plate discharging roller 109 is the support surface 113 of the plurality of ribs 111. In this state, it is fed into the storage box 105. At this time, since a plurality of the plate discharge rollers 109 are provided at appropriate intervals in the width direction of the master, a plurality of portions where the master is fed from the plate discharge roller 109 are actively fed.

  However, in the width direction of the master, the portion between the plurality of plate discharge rollers 109 and the portion outside the plate discharge roller 109 on both sides in the width direction of the master (outside in both directions when viewed in the width direction of the master) Is more likely to be delayed in transfer than the portion fed by the plate discharge roller 109 due to frictional resistance caused by contact between the upper surface of the rib 111 and the support surface 113. Therefore, when the succeeding portion of the master is fed by the discharge roller 109 in a state where the leading portion of the master is delayed due to friction with the support surface 113 when being fed into the storage box 105, the support surface 113. Above, wrinkles the master and the master tends to be folded. At this time, both sides in the width direction of the master are in a state where the convolution is insufficient compared to the center side and swells more than the center side.

  Then, when the compression plate 119 in the compression means 115 is rotated in the clockwise direction in FIG. 5 and moved (rotated) in the clockwise direction from the position indicated by the solid line, the master 103 enters the accommodation box 105 from the rib 111. Is pulled in and the master 103 is compressed. Also at this time, both side portions in the width direction of the master 103 are in a state of being swollen more than the center portion in the width direction. In other words, when the master 103 is fed into the storage box 105 by the discharge roller 109 and when the master 103 is compressed by the compression means 115, both sides in the width direction of the master 103 are directed to the feeding direction and the compression direction by frictional resistance. As a result, a force in the opposite direction acts, and it is difficult to reduce the volume of the master 103 after compression.

  Therefore, it is desired to fold the master 103 so that the volume of the master 103 becomes smaller and accommodate more masters 103 in the accommodation box 105 having a certain volume (capacity).

  The present invention has been made in view of the above-described problems, and is a master recovery device in a stencil printing apparatus, a storage box for storing a master transported from a plate cylinder in the stencil printing apparatus, and this storage A master feeding means for feeding a master from the plate cylinder into the storage box and a plurality of ribs for supporting the master immediately after being fed into the storage box by the master feeding means. And a compression means for compressing the master fed into the storage box, and the plurality of ribs supporting the master are provided with low friction ribs having a small frictional resistance between the master and the ribs. The ribs are arranged at positions that support both sides in the width direction of the master.

  Further, in the master recovery apparatus in the stencil printing apparatus, the low friction ribs are arranged at a plurality of locations so as to correspond to a plurality of types of sizes of the master.

  Further, in the master recovery device in the stencil printing device, out of the plurality of plate discharge rollers provided in the master feeding means, it is outside in the width direction with respect to the plate discharge rollers corresponding to both sides in the width direction of the master, and The low friction rib is arranged inside both side edges in the width direction.

  Further, in the master recovery device in the stencil printing device, the width of the master among the plurality of pulling claws provided in the compression means for pulling and compressing the master fed onto the plurality of ribs into the storage box. The low-friction ribs are arranged on the outer side in the width direction with respect to the pulling claws corresponding to both sides in the direction and on the inner side with respect to both side edges in the width direction of the master.

  Further, in the master recovery device in the stencil printing apparatus, the support surface on which the low friction rib supports the master is formed lower than the support surface on which the other rib supports the master. It is.

  According to the present invention, when the master is fed into the housing box by the master feeding means, the master immediately after being fed into the housing box by the master feeding means is supported by the plurality of ribs, but in the width direction of the master. Since both side portions are supported by low friction ribs with small frictional resistance, the both sides in the width direction of the master are not delayed with respect to the center side in the width direction of the master when the master is fed. The problem as described above can be solved.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. The overall configuration of a stencil printing apparatus is already known, but in order to facilitate understanding, FIG. An overall configuration of the stencil printing apparatus will be schematically described.

  As shown in FIG. 1, the stencil printing apparatus 1 includes a casing 3, and a stencil printing unit 5 that performs stencil printing is provided in the casing 3. A side of the casing 3 is provided with a paper feed base 7 for feeding paper to the stencil printing unit 5, and the other side of the casing 3 A paper discharge tray 9 is provided for stacking sheets printed in the stencil printing unit 5 and discharged to the outside. Further, the upper part of the housing 3 is provided with a document reading means 11 for optically reading a document to be printed. Since the paper feed tray 7, the paper discharge tray 9, and the document reading means 11 are well-known configurations in the stencil printing apparatus 1, the details of the paper feed tray 7, the paper discharge tray 9 and the document reading means 11 will be described. Will not be described.

  The stencil printing unit 5 is provided with a cylindrical plate cylinder 13 formed by, for example, a punching board, etc., so as to be rotatable, and is located at a position adjacent to the plate cylinder 13 with respect to the plate cylinder 13. A base paper supply roll 15 for supplying the stencil base paper is rotatably provided. The base paper supply path from the base paper supply roll 15 to the plate cylinder 13 is provided with a thermal head 17 for perforating the base paper and making a plate corresponding to the original image read by the original reading means 11. A cutter 19 for cutting the base paper into an appropriate length is provided on the downstream side of the thermal head 17. Further, a base paper supply roll 23 for feeding the base paper P to the base paper clamp 21 provided in the plate cylinder 13 is provided on the downstream side of the cutter 19.

  With the above configuration, when the original reading unit 11 reads an original, the thermal head 17 punches the base paper P in accordance with the original image and performs plate making. Then, when the base paper P is cut into a predetermined length by the cutter 19 and fed to the base paper clamp 21 of the plate cylinder 13 by the base paper supply roll 23, the leading edge of the base paper P is clamped and the plate is made to the plate cylinder 13. The base paper P is attached.

  Then, ink is supplied from the ink supply means 25 provided inside the plate cylinder 13, and at the top of one of the sheets stacked by the scraper 27 and the pickup roll 29 provided on the upper side of the paper feed table 7. Is fed between the timing roll 31 and the guide roll 33, the paper is supplied in time with the rotation of the plate cylinder 13, and the paper is fed while pressing the outer peripheral surface of the plate cylinder 13 by the press roll 35. Thus, printing is performed on the paper.

  When the paper passes through the press roll 35, the paper is peeled from the plate cylinder 13 by the peeling claw 37 provided on the downstream side of the press roll 35. The peeled sheet is conveyed and stacked on the paper discharge tray 9 while being adsorbed by the conveying means 39 provided with the adsorbing means.

  In addition, since the structure of each part mentioned above is well-known, the description about the more detailed structure and effect | action is abbreviate | omitted.

  A master recovery device 41 for recovering the stencil sheet removed from the plate cylinder 13 (ie, the master sheet made of the master, ie, the master) is provided in the housing 3 at a position close to the plate cylinder 13. ing.

  More specifically, the master collection device 41 is provided with a housing box 43 for housing a master (not shown) removed from the plate cylinder 13 and carried in the housing 3 detachably. . As shown in FIG. 2, a master feeding means 45 is provided on the entrance side of the master into the storage box 43. The master feeding means 45 is supported by the casing 3, and has a rotating shaft 47 that is long in the direction perpendicular to the master loading direction, that is, in the width direction of the master (direction perpendicular to the paper surface in FIG. 2). I have.

  The rotating shaft 47 is rotationally driven by a motor (not shown) installed at an appropriate position of the housing 3. The longitudinal direction of the rotating shaft 47 corresponds to a plurality of width dimensions of the master. A plurality of drive pulleys 49 are provided at appropriate intervals. Then, each driven pulley 55 and each driving pulley 49 that are rotatably supported by each swinging bracket 53 that is swingably provided on a part of the housing 3 by a pivot 51 corresponding to each driving pulley 49. The endless feed belt 57 is wound around each. That is, the plurality of feed belts 57 are provided at a plurality of locations corresponding to a plurality of types of width dimensions of the master.

  A driven shaft 59 parallel to the rotation shaft 47 is rotatably provided in a part of the housing 3 at a position below the conveyor belt 57. A plate discharging roller (feeding roller) 61 that is driven and rotated in contact with the feeding belt 57 is provided. Reference numeral 63 in FIG. 2 denotes a tension roller for maintaining a long contact length between the feed belt 57 and the plate discharge roller 61, and is rotatably supported on a shaft provided horizontally in a part of the housing 3. Has been.

  With the above configuration, when the feed belt 57 is rotated in the clockwise direction in FIG. 2, the plate discharge roller 61 is driven to rotate counterclockwise. Therefore, when the master removed from the plate cylinder 13 is transported in the direction of arrow A and is sandwiched between the feed belt 57 and the discharge roller 61, the accommodation chamber of the accommodation box 43 is operated by the feed belt 57. It will be sent into 65.

  And in order to accommodate more masters in the accommodation chamber 65 of the accommodation box 43, the compression means 69 for compressing the master in the accommodation chamber 65 from the entrance side toward the rear wall portion 67 in the accommodation chamber 65. Is provided. More specifically, a rotation shaft 71 parallel to the rotation shaft 47 is provided on a part of the housing 3 so as to be rotatable above the storage box 43. The rotation shaft 71 is attached with a base side of a compression plate 73 for compressing the master in the storage chamber 65 from the inlet side toward the back wall portion 67.

  Therefore, when the rotation shaft 71 is rotated clockwise in FIG. 2 by an actuator (not shown) such as a motor, the compression plate 73 is rotated in the same direction, and the master in the storage chamber 65 is moved from the inlet side to the above-described master. Compression is performed in the direction of the back wall 67. Then, when the compression plate 73 is rotated and raised to the original position, the compressed master bulges, adheres (sticks) to the compression plate 73, and may return to the entrance side of the storage box 43, In some cases, it may be entangled with the discharge roller 61 or the like.

  Therefore, in order to prevent the master compressed in the storage chamber 65 from returning when the compression plate 73 is returned, the lower side of the discharge roller 61 is provided from the entrance of the storage chamber 65 in the storage box 43. A plurality of ribs 75 protruding into the storage chamber 65 are provided in a part of the housing 3. The plurality of ribs 75 are provided at appropriate intervals in the width direction of the master (in the direction perpendicular to the paper surface in FIG. 2), and as described above, the master that the compressed master in the storage chamber 65 returns. In the entire width direction, and also supports the master immediately after being fed into the storage chamber 65 by the master feeding means 45. And the support surface (support part) 77 which the rib 75 supports a master is inclined so that it may become so low in the said storage chamber 65, as shown in FIG.

  By the way, as shown in FIG. 3, the discharge roller (feed roller) 61 in the master feed means 45 is provided at the center in the longitudinal direction (master width direction) of the rotary shaft 59, and is, for example, A4. Displacement rollers 61A and 61B are provided corresponding to the width dimensions of masters M1, M2 and M3 having various dimensions B4 and A3. The interval between the discharge rollers 61A and 61A corresponding to the A4 size master M1 is set smaller than the width dimension of the master M1. In other words, both sides of the master M1 in the width direction (left-right direction in FIG. 3) are fed into the storage box 43 in a state of projecting in the width direction (left-right direction) from the discharge rollers 61A, 61A. Is.

  The plate discharge rollers 61B and 61B on both ends in the longitudinal direction of the rotary shaft 59 correspond to the B4 and A3 size masters M2 and M3, and the interval dimension between the plate discharge rollers 61B and 61B is a B4 size master. It is set smaller than the width dimension of M2. Therefore, both sides in the width direction of the masters M2 and M3 of B4 and A3 sizes pass through the outside of the discharge rollers 61B and 61B in a manner protruding in the width direction from the discharge rollers 61B and 61B. To be sent to.

  The compression plate 73 for compressing the master sent into the accommodation chamber 65 of the accommodation box 43 by the master feeding means 45 to the back wall 67 side is a compression plate 73A corresponding to the A4 size master M1. 73A and compression plates 73B and 73B corresponding to the masters M2 and M3 of B4 and A3 sizes. A plurality of pulling claws 81 are provided on the distal end sides of the compression plates 73A and 73B so as to be able to pass through a portion of an interval 79 (see FIG. 4) between the ribs 75.

  As described above, when the master is fed into the accommodation chamber 65 of the accommodation box 43 by the master feeding means 45, the master immediately after passing through the plate discharge roller 61 is supported by the support surfaces 77 inclined by the plurality of ribs 75. Due to the friction between the support surface 77 and the master, the moving speed of the master becomes slower than the feeding speed fed by the master feeding means 45. Therefore, the master is gradually compressed on the rib 75 and is folded.

  At this time, the portion of the master that is sandwiched between the feed belt 57 and the plate discharge roller 61 in the master feed means 45 is positively fed, but the outside of the master plate discharge roller 61 (outside in the width direction). ), That is, both sides of the master in the width direction tend to be delayed by friction with the ribs 75. Therefore, if both sides of the master in the width direction tend to lag behind the center side, both sides of the master in the width direction tend to bulge from the center side when the master is convoluted. There is a problem that it is difficult to fold it evenly.

  Therefore, the ribs 75A and 75B corresponding to both sides in the width direction of the master are configured as low friction ribs having a small frictional resistance with the master fed into the storage chamber 65. The low friction rib 75A supports both sides in the width direction of the A4 size master M1 on the outer side (outside as viewed in the width direction of the master) of the discharge roller 61A corresponding to the A4 size master M1. The low friction ribs 75B located to the side of the low friction ribs 75A support both sides of the masters M2 and M3 in the width direction outside the plate discharge roller 61B corresponding to the masters M2 and M3 of B4 and A3 sizes. Is.

  In the low friction ribs 75A that support both sides of the A4 size master M1 in the width direction, the low friction ribs 75AA located outside the width direction of the master M1 are formed on the compression plate 73 as shown in FIG. A width direction of the master M1 of A4 size, which is located outside the width direction of the pull-in claw 81A corresponding to the width in the compression plate 73A provided corresponding to M1 (the pull-in claw outside the width direction in the compression plate 73A). It is arrange | positioned in the position inside the width direction rather than both side edge M1E. The low friction ribs 75B provided corresponding to the masters M2 and M3 of B4 and A3 sizes are the widths provided in the compression plate 73B provided corresponding to the master M2 in the compression plate 73B. It is arranged at a position on the outer side in the width direction with respect to the corresponding pull-in claw 81B and at a position on the inner side in the width direction with respect to both side edges M2E in the width direction of the master M2 of B4 size.

  Therefore, when the master M1 is pulled (scratched) by the pulling claw 81 in the compression plate 73A, the low friction rib 75AA is a master on the outer side of the outermost drawing claw 81A in the width direction of the compression plate 73A. The lower friction ribs 75B support the vicinity of both sides in the width direction of M1, and when the master M2 is pulled in by the pulling claws 81B in the compression plate 73B, the low friction ribs 75B extend in the width direction of the master M2 outside the pulling claws 81B. It supports the vicinity of both sides.

  As means for reducing the frictional resistance caused by the contact between the low friction ribs 75A and 75B and the master, for example, a fluororesin is coated on the low friction ribs 75A and 75B, and the friction coefficient in the low friction ribs 75A and 75B can be changed. It is also possible to adopt a configuration in which the friction coefficient of the rib 75 is smaller. However, in this example, the height positions of the support surfaces (contact surfaces) 77 on which the low friction ribs 75A and 75B support the master are shown in FIG. 2 and FIG. The contact surface is lower than the height position of 77.

  Therefore, the master immediately after being fed into the storage box 43 by the feeding roller (discharge roller) 61 in the master feeding means 45 is supported by the support surfaces 77 of the ribs 75. In the state where the feed speed is slowed by the frictional resistance between the support surface 77 and the master, the master is fed by the feed roller 61 and the like, so that the master is folded at the support surface 77 of the rib 75. The resulting master will be folded.

  At this time, since the support surfaces 77 of the low friction ribs 75A and 75B corresponding to both sides in the width direction of the master are formed lower than the support surfaces 77 of the other ribs 75, the support surfaces of the low friction ribs 75A and 75B. 77 supports both sides of the master in a state where it hangs down from another rib 75 having a high support surface 77. Therefore, the weight of the master acting on the low friction ribs 75A and 75B is smaller than when the support surface 77 of the low friction ribs 75A and 75B is at the same height as the support surfaces 77 of the other ribs 75, The frictional resistance between the master and the low friction ribs 75A and 75B becomes small.

  Therefore, when the master fed into the accommodation chamber 65 in the accommodation box 43 by the master feeding means 45 is folded on the support surface 77 of the rib 75, both sides in the width direction of the master are with respect to the center side. There is no delay, and it is folded almost evenly over the entire width direction of the master, so that both sides of the master in the width direction are prevented from being swollen.

  Thereafter, the compression plate 73 is rotated downward from the substantially horizontal position shown in FIG. 2, and the master is drawn into the accommodation chamber 65 in the accommodation box 43 from the support surface 77 of the rib 75 (scratched). At this time, both sides in the width direction of the master are moved without being delayed with respect to the center side. That is, it is drawn into the storage chamber 65 while maintaining a state of being almost uniformly folded over the entire length in the width direction of the master, and is pressed and compressed in the direction of the inner wall 67 of the storage chamber 65. is there.

  As already understood, the master transferred into the storage chamber 65 in the storage box 43 is folded almost uniformly over the entire length in the width direction without causing swelling or the like on both sides in the width direction. More masters can be accommodated in the capacity accommodating chamber 65, and the conventional problems as described above can be solved.

  The present invention is not limited to the above-described embodiment, and can be implemented in other forms by making appropriate changes. That is, in order to reduce the friction coefficient of the support surface 77 of the low friction ribs 75A and 75B, the support surface 77 is formed as a smooth surface, and in order to increase the friction coefficient of the support surface 77 of the other ribs 75, the above support. It is also possible to form the surface 77 as a rough surface.

It is explanatory drawing which showed notionally and schematically the whole structure of the stencil printing apparatus provided with the master collection | recovery apparatus which concerns on embodiment of this invention. It is explanatory drawing which shows the structure of the master collection | recovery apparatus which concerns on embodiment of this invention. It is plane explanatory drawing which shows the principal part of the master collection | recovery apparatus which concerns on embodiment of this invention. FIG. 5 is a perspective explanatory view showing a positional relationship between a feeding roller (a plate discharge roller), a rib and a low friction rib of the master recovery device according to the embodiment of the present invention. It is explanatory drawing which showed the structure of the conventional master collection | recovery apparatus roughly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 3 Housing | casing 5 Stencil printing part 7 Paper feed stand 9 Paper discharge stand 11 Document reading means 13 Plate cylinder 41 Master collection | recovery apparatus 43 Accommodating box 45 Master feeding means 59 Rotating shafts 61, 61A, 61B )
65 Storage chamber 67 Back wall portion 69 Compression means 73 Compression plate 75 Rib 75A, 75B Low friction rib 77 Support surface (support portion)
81 Retraction claw

Claims (5)

  A master recovery device in a stencil printing apparatus, wherein the master box is disposed on an inlet side of the storage box for storing a master conveyed from a plate cylinder in the stencil printing apparatus, and the master from the plate cylinder is Master feeding means for feeding into the receiving box, a plurality of ribs for supporting the master immediately after being sent into the receiving box by the master feeding means, and compression for compressing the master sent into the receiving box The plurality of ribs supporting the master are provided with low friction ribs having a small frictional resistance between the master and the ribs, and the low friction ribs are located at positions supporting both sides of the master in the width direction. A master recovery device in a stencil printing device, wherein the master recovery device is arranged.   2. The master recovery device in a stencil printing apparatus according to claim 1, wherein the low friction ribs are arranged at a plurality of locations so as to correspond to a plurality of types of sizes of the master. apparatus.   3. The master recovery device in the stencil printing apparatus according to claim 1, wherein among the plurality of discharging rollers provided in the master feeding unit, the outer side in the width direction than the discharging rollers corresponding to both sides in the width direction of the master. A master recovery device in a stencil printing machine, wherein the low friction ribs are arranged inside both side edges in the width direction of the master.   4. A master recovery device in a stencil printing apparatus according to claim 1, 2 or 3, wherein a plurality of pulling claws provided in said compression means for pulling and compressing a master fed onto said plurality of ribs into said storage box. Among the above, the low friction ribs are arranged outside the pulling claws corresponding to both sides in the width direction of the master and inside the both side edges in the width direction of the master. Master recovery device in a stencil printing machine.   5. The master recovery device in a stencil printing apparatus according to claim 1, wherein the support surface on which the low friction rib supports the master is formed lower than the support surface on which the other rib supports the master. A master recovery device in a stencil printing apparatus, characterized in that:

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