JP2018176520A - Aligning auxiliary tool, printing unit, and aligning method for plate cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aligning auxiliary tool, a printing unit, and an aligning method for a plate cylinder, that minimize print starting loss generated when performing follow-up printing.SOLUTION: Aligning auxiliary tools 2 and 4 comprise: a first aligning part 10 which is mounted on an upstream side of a plate cylinder (for example, a plate cylinder 142) in a conveyance direction of a band-like web; and a second alignment part 30 which is mounted on a downstream side of the plate cylinder. A first register mark is printed in advance on the band-like web, and a mark adding part (for example, a mark adding part 143) for adding a second register mark on the band-like web, is disposed on an outer peripheral surface of the plate cylinder. A target position (displayed as a reference symbol S) of the mark adding part is displayed on the outer peripheral surface of the plate cylinder, so as to substantially align a position of the first register mark and a position of the second register mark added to the band-like web, by using the first aligning part 10 and the second alignment part 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an alignment aid for aligning a plate cylinder for performing a reprint on a strip-shaped web, a printing unit provided with such an alignment aid, and a method of aligning a plate cylinder.

  2. Description of the Related Art Conventionally, in gravure rotary printing, a plurality of inks are superimposed and printed on a strip-like web (i.e., multi-color printing) in order to express a pattern expression and a specific function. In addition, when multi-color printing is performed, a method called "post-printing" may be used in which printing is additionally performed on a belt-like web on which patterns and the like have already been printed. Such post-printing is performed when a processing step or the like is performed before, during, or after printing, or when the number of inks to be superimposed is large. In addition, in reprint, it is important to match the position and phase of a printing plate cylinder to be printed with the position and phase of a pattern or the like printed on a belt-like web.

  In addition, as a configuration for aligning the phase of the plate cylinder and the phase of a pattern or the like printed on the belt-like web in reprinting, for example, those disclosed in Patent Document 1 can be mentioned. In the configuration disclosed in Patent Document 1, printing of a pattern etc. and a second register mark is performed by a plate cylinder used for post printing on a belt-like web on which a pattern etc. and the first register mark are printed in advance. It is supposed to be. The position of the first register mark and the position of the second register mark are detected by the detection unit, and feedback control is performed based on the relative "displacement amount", whereby the phase and rotational speed of the plate cylinder are obtained. Is supposed to adjust.

JP, 2005-324387, A

  However, in the configuration disclosed in Patent Document 1, based on the amount of deviation between the position of the register mark printed in advance on the belt-like web and the position of the register mark printed newly by the plate cylinder used for postprinting. The phase and rotational speed of the plate cylinder are feedback controlled. That is, in the configuration disclosed in Patent Document 1, there is a problem that a printing loss of the belt-like web occurs from immediately after printing until alignment of the plate cylinder by feedback control is completed. . In addition, the loss of printing in the reprint becomes a problem particularly when reprinting is performed on a relatively high production cost product such as a high performance product.

  Further, in the configuration disclosed in Patent Document 1, depending on the phase of the plate cylinder at the time of printing, etc., the first register mark pre-printed on the belt-like web and the newly printed by the second printing There is a problem that there is a possibility that both register marks may not exist in the detection range of the detection unit due to the large separation between the two register marks. In this case, the shift amount between the two register marks can not be detected, and it takes time to adjust the phase and rotational speed of the plate cylinder, which further increases the printing loss. There's a problem.

  The present invention has been made in consideration of such a point, and is disposed downstream of the plate cylinder with the first alignment portion installed upstream of the plate cylinder in the direction of conveyance of the strip web. Alignment assistance can be performed before the start of reprint by using the second alignment unit thus performed, and alignment assistance can thereby minimize the printing loss during reprint. It is an object of the present invention to provide a method of aligning a tool, a printing unit and a plate cylinder.

  The alignment assisting tool of the present invention is an alignment assisting tool for aligning a plate cylinder which performs additional printing on a continuously conveyed strip-like web, and in the conveying direction of the strip-like web A first alignment unit installed upstream of the plate cylinder, and a second alignment unit installed downstream of the plate cylinder in the direction of conveyance of the belt-like web; A first register mark is printed in advance on the belt-like web, and a mark applying section for applying a second register mark to the belt-like web is provided on the outer peripheral surface of the plate cylinder. The alignment unit is movable in the width direction of the plate cylinder, and has a marker for defining, as a reference position, a position in the width direction of the first register mark in the belt-like web. The two alignment units are movable in the width direction of the plate cylinder, and the position of the first register mark in the belt-like web and the second register applied to the belt-like web by the marking application unit The display member may have a display member for displaying on the outer peripheral surface of the plate cylinder the target position of the marking unit that substantially matches the position of the mark.

  According to such an alignment aid, by defining the position in the width direction of the first register mark in the strip web as a reference position by the marker, the first register mark in the strip web defined by the marker It becomes possible to move the display member so that the reference position of and the position in the width direction of the display member substantially match. Then, the plate cylinder is aligned so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder by the display member. According to such a method of aligning the plate cylinder, the plate cylinder can be aligned before the start of the second printing, and therefore, it is possible to minimize the printing loss at the time of second printing.

  In the alignment aid of the present invention, the display member may be a projector which projects the target position of the marking unit on the outer peripheral surface of the plate cylinder.

  In addition, the first alignment portion further includes a first scale extending along the width direction of the strip-like web, and the position of the marker in the width direction of the strip-like web is measured by the first scale. You may be able to

  In addition, the second alignment portion further includes a second scale extending along the width direction of the strip-like web, and the position of the display member in the width direction of the strip-like web is determined by the second scale. It may be made to be able to measure.

  The alignment aid of the present invention detects the relative positional relationship between the first register mark in the belt-like web and the second register mark applied to the belt-like web by the marking unit. May be further provided.

  Further, in the alignment aid of the present invention, the first alignment unit may further include an advancing and retracting mechanism for advancing and retracting the marker toward the belt-like web.

  The printing unit according to the present invention is a printing unit for performing additional printing on the continuously conveyed belt-like web, and the conveyance unit continuously conveys the belt-like web, and the conveyance unit continuously conveys the belt-like web. A printing unit for printing on a strip-shaped web, and the printing unit is provided with a plate cylinder for supplying ink to the outer peripheral surface thereof, and a strip-shaped web to the plate cylinder There is provided an impression cylinder for pressing toward the image forming surface and an alignment aid for aligning the plate cylinder, and a first register mark is printed on the belt-like web sent to the printing unit in advance. The mark applying unit for applying a second register mark to the belt-like web is provided on the outer peripheral surface of the plate cylinder, and the alignment aid is upstream of the plate cylinder in the conveyance direction of the belt-like web. Installed on the side A first alignment unit, and a second alignment unit installed downstream of the plate cylinder in the conveying direction of the belt-like web, the first alignment unit being a portion of the plate cylinder A marker is provided which is movable in the width direction and which defines, as a reference position, a position in the width direction of the first register mark in the belt-like web, and the second alignment unit is configured to It is movable in the width direction of the cylinder so that the position of the first register mark in the belt-like web substantially matches the position of the second register mark applied to the belt-like web by the marking unit. It has a display member which displays the target position of the said mark provision part on the outer peripheral surface of the said printing cylinder.

  According to such a printing unit, since the alignment assisting tool is provided, the position in the width direction of the first register mark in the belt-like web is defined by the marker by defining it as the reference position by the marker. The display member can be moved so that the reference position of the first register mark in the belt-like web substantially matches the position in the width direction of the display member. Then, the plate cylinder is aligned so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder by the display member. According to such a method of aligning the plate cylinder, the plate cylinder can be aligned before the start of the second printing, and therefore, it is possible to minimize the printing loss at the time of second printing.

  The method for aligning a plate cylinder according to the present invention is a method for aligning a plate cylinder for aligning a plate cylinder on which a first register mark is printed and subsequently printing is carried out on a continuously transported strip web. And a step of defining a position in the width direction of the first register mark in the strip web as a reference position by a marker, a reference position of the first register mark in the strip web defined by the marker, Moving the display member along the width direction of the plate cylinder so as to substantially coincide with the position in the width direction of the display member; and a second register mark provided on the outer peripheral surface of the plate cylinder A step of causing a display member to display a target position of the marking unit to be applied to the belt-like web on the outer peripheral surface of the plate cylinder, and the mark displayed on the outer peripheral surface of the plate cylinder And performing positioning of the plate cylinder so that the target position of the given portion align the marking unit, characterized by comprising a.

  According to such a printing cylinder alignment method, the first position on the strip-like web defined by the marker is defined by defining the position in the width direction of the first register mark on the strip-like web as the reference position by the marker. The display member can be moved so that the reference position of the register mark substantially matches the position in the width direction of the display member. Then, the plate cylinder is aligned so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder by the display member. According to such a method of aligning the plate cylinder, the plate cylinder can be aligned before the start of the second printing, and therefore, it is possible to minimize the printing loss at the time of second printing.

  According to the alignment aid of the present invention, the printing unit and the alignment method of the plate cylinder, the plate cylinder can be aligned before the start of the reprint, and therefore the printing loss during the reprint can be minimized It can be reduced.

FIG. 1 is a side view showing a schematic configuration of a printing press having an alignment aid according to an embodiment of the present invention. It is a side view which shows the structure of the registration aid and the printing unit in the printing machine shown in FIG. It is a block diagram which shows the structure of the 1st alignment part in the alignment assistance tool shown to FIG. 1 and FIG. FIG. 5 is a configuration diagram showing a configuration of a second alignment unit in the alignment assisting tool shown in FIG. 1 and FIG. FIG. 2 is a configuration diagram schematically showing the configuration of a registration assisting tool and a printing unit shown in FIGS. 1 and 2 etc. It is explanatory drawing for demonstrating the advancing / retracting mechanism for making the marker of the 1st alignment part shown to FIG. 1 and FIG. FIG. 7 is an explanatory view for explaining an operation when performing alignment of the plate cylinder by the first alignment portion of the alignment assisting tool shown in FIGS. 1 and 2 and the like. FIG. 8 is an explanatory view for explaining an operation when performing alignment of the plate cylinder by the first alignment portion of the alignment assisting tool shown in FIG. 1 and FIG. 2 etc. subsequently from the state shown in FIG. 7; FIG. 9 is an explanatory view for explaining an operation when performing alignment of the plate cylinder by the second alignment portion of the alignment assisting tool shown in FIG. 1 and FIG. 2 etc., which is continued from the state shown in FIG. 8; FIG. 10 is an explanatory view for explaining an operation when performing alignment of the plate cylinder by the second alignment portion of the alignment assisting tool shown in FIG. 1 and FIG. 2 etc. subsequently from the state shown in FIG. 9; It is a side view which shows roughly the other structure of the printing machine which has an alignment assistance tool shown to FIG. 1 and FIG. 2 grade | etc.,.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 11 show an alignment aid according to an embodiment of the present invention, a printing unit provided with such an alignment aid and a printing machine having such a printing unit. Among them, FIG. 1 is a side view showing a schematic configuration of a printing machine having an alignment aid according to the present embodiment, and FIG. 2 is an alignment aid and printing unit in the printing machine shown in FIG. It is a side view showing composition of. 3 is a configuration diagram showing the configuration of the first alignment portion in the alignment aid shown in FIGS. 1 and 2, and FIG. 4 is a diagram showing the structure of the alignment aid shown in FIGS. FIG. 2 is a configuration diagram showing a configuration of a plate cylinder in a two alignment unit and a printing unit. FIG. 5 is a block diagram schematically showing the configuration of the alignment aid and the printing unit shown in FIG. 1 and FIG. 6 is an explanatory view for explaining an advancing and retracting mechanism for advancing and retracting the markers of the first alignment unit shown in FIG. 1 and FIG. 2 etc. toward the belt-like web. 7 to 10 are explanatory views for sequentially explaining the operation when the plate cylinder is aligned by the first alignment portion of the alignment assisting tool shown in FIGS. 1 and 2 and the like. FIG. 11 is a side view schematically showing another configuration of the printing press having the alignment assisting tool shown in FIGS. 1 and 2 and the like. In FIG. 1 to FIG. 11, the belt-like web is indicated by reference symbol W. Also, in FIGS. 2, 3 and 6 to 8, the first register mark printed on the belt-like web is indicated by the reference symbol P. In FIGS. 2, 4, 9 and 10, the target position displayed on the outer peripheral surface of the plate cylinder by the display member is indicated by the reference symbol S. Hereinafter, the alignment aid according to the present embodiment, a printing unit provided with such an alignment aid, and a configuration of a printing machine having such a printing unit will be described in more detail.

  First, a printing unit provided with an alignment aid according to the present embodiment and a configuration of a printing machine having such a printing unit will be described with reference to FIGS. 1 and 2. FIG.

  As shown in FIG. 1, the printing press 100 includes a delivery unit 110 for delivering a strip-like web, and a transport unit for delivering the strip-like web delivered from the delivery unit 110 continuously (specifically, a pair of in A feed roller 120, a pair of out feed rollers 160, etc., a pair of pitch control rolls 130, a first printing unit 140 and a second printing unit 150 for printing on a belt-like web, and a belt-like web And a winding unit 170. More specifically, each pitch control roll 130 is adapted to apply tension to the belt-like web conveyed by the conveyer, and to control the magnitude of tension applied to the belt-like web. ing. As a result, when the first printing unit 140 and the second printing unit 150 reprint the belt-like web on which the first register mark and pattern etc. have been printed in advance, each pitch control roll 130 makes a belt-like web. The web can be extended and contracted so that the pitch (distance) of the first register marks and patterns etc. printed in advance on the strip-like web can be adjusted. The first printing unit 140 and the second printing unit 150 are designed to perform reprinting on the belt-like web with inks of different colors.

  The first printing unit 140 also has a plate cylinder 142 whose ink is supplied to the outer peripheral surface thereof by an ink supply unit (not shown), and a belt-like web for pressing the plate web against the plate cylinder 142. An impression cylinder 144 and guide rollers 146 and 147 for guiding the belt-like web to be conveyed are provided. In addition, when the plate web is sandwiched between the plate cylinder 142 and the impression cylinder 144, the plate cylinder 142 and the impression cylinder 144 are rotated to perform additional printing on the belt web. .

  More specifically, as shown in FIG. 2, the impression cylinder 144 of the first printing unit 140 is between the advanced position (indicated by a two-dot chain line in FIG. 2) and the retracted position (indicated by a solid line in FIG. 2). It is provided to be movable in the vertical direction in FIG. In addition, when the impression cylinder 144 is at the advanced position, a nip portion is formed between the plate cylinder 142 and the impression cylinder 144. As a result, the first printing unit 140 can perform reprinting on the belt-like web supplied to the first printing unit 140. In the alignment operation of the plate cylinder 142 described later, alignment of the plate cylinder 142 is performed in a state where the impression cylinder 144 is positioned at the retracted position.

  Further, the strip-like web subjected to the second printing by the first printing unit 140 is fed downstream by the plate cylinder 142 and the impression cylinder 144 in the conveying direction of the strip-like web. In other words, in the first printing unit 140, the plate cylinder 142, the impression cylinder 144, and the like constitute a conveyance unit that continuously conveys the belt-like web. In addition, a marking unit 143 (described later) is provided on the outer peripheral surface of the plate cylinder 142, and the marking unit 143 is configured to add a second register mark to the belt-like web.

  Further, as shown in FIGS. 1 and 2, the first printing unit 140 has an alignment aid 2 for aligning the plate cylinder 142 before starting the reprinting. More specifically, the alignment assisting tool 2 according to the present embodiment includes the first alignment unit 10 disposed upstream of the plate cylinder 142 in the belt-shaped web transport direction, and the belt-shaped web transport direction. And a second alignment unit 30 disposed downstream of the plate cylinder 142. As described later, by using the first alignment unit 10 and the second alignment unit 30, alignment of the plate cylinder 142 can be performed before start of reprint.

  Further, the second printing unit 150 is configured to press the ink web on the outer peripheral surface of the plate cylinder 152 by an ink supply unit (not shown), and to press the web in a belt shape toward the plate cylinder 152. It has an impression cylinder 154 and guide rollers 156 and 157 for guiding the strip web to be conveyed. The impression cylinder 154 of the second printing unit 150 is provided so as to be movable in the vertical direction in FIG. 1, and the plate web is held between the plate cylinder 152 and the impression cylinder 154 in a state in which the plate web is held. The rotation of the cylinder 152 and the impression cylinder 154 causes the belt-like web to be reprinted. In addition, a marking unit (not shown) is provided on the outer peripheral surface of the plate cylinder 152, and the strip-like web subjected to the reprinting by the marking unit is the second register mark described above. Different register marks are given.

  The second printing unit 150 also has an alignment aid 4 for aligning the plate cylinder 152 before the start of the second printing. More specifically, the alignment aid 4 in the second printing unit 150 is a first alignment unit 10 (specifically, the first alignment unit 10 installed upstream of the plate cylinder 152 in the belt-like web transport direction). A first alignment unit 10) installed upstream of the plate cylinder 142 of the printing unit 140, and a second alignment unit 30 installed downstream of the plate cylinder 152 in the direction of conveyance of the belt-like web It is configured. Here, the first alignment unit 10 installed on the upstream side of the plate cylinder 142 of the first printing unit 140 has a position corresponding to the alignment aid 2 corresponding to the first printing unit 140 and the second printing unit 150. It is shared by the alignment aid 4. As described later, also in the second printing unit 150, the first alignment unit 10 installed on the upstream side of the plate cylinder 142 of the first printing unit 140 and the downstream side of the plate cylinder 152 of the second printing unit 150. By using the second alignment unit 30 installed, alignment of the plate cylinder 152 can be performed before starting reprint.

  The first alignment unit 10 is not limited to a mode in which the first printing unit 140 and the second printing unit 150 share the same. As another aspect, the first alignment unit 10 is additionally provided at a location downstream of the plate cylinder 142 of the first printing unit 140 and upstream of the second printing unit 150, and the additional The alignment of the plate cylinder 152 of the second printing unit 150 may be performed by the first alignment unit 10 provided in FIG.

  The configuration of the alignment aids 2 and 4 provided in such a printing unit will be described in more detail with reference to FIGS. 2 to 6. Further, in the following, in order to facilitate understanding of the configuration of the printing unit and the alignment aids 2 and 4, the configuration of the first printing unit 140 is referred to as the printing unit and the first printing unit as the alignment aid The configuration of the alignment aid 2 corresponding to 140 will be described with reference to FIG.

  As described above, the alignment aid 2 according to the present embodiment is the first alignment portion disposed upstream of the plate cylinder 142 in the belt-shaped web transport direction (downward in FIGS. 3 to 5). 10, and a second alignment unit 30 disposed downstream of the plate cylinder 142 in the belt-shaped web conveyance direction. Further, the first alignment unit 10 and the second alignment unit 30 are provided in a state of being separated from the strip-like web by a predetermined distance. Further, a first register mark (indicated by a reference symbol P in FIG. 2) and a pattern or the like are printed at a predetermined pitch (interval) on the belt-like web to be reprinted by the plate cylinder 142.

  Further, as shown in FIG. 3, the first alignment portion 10 has a support member 12 extending along the width direction of the belt-like web. In addition, a first scale 13 having a scale is attached to the support member 12 so as to extend along the width direction of the belt-like web. Further, a supported member 14 is attached to the support member 12 so as to be movable along the extending direction of the support member 12 (that is, the left and right direction in FIG. 3).

  Further, the supported member 14 is provided with a reading needle 15 for measuring the position of the supported member 14 (that is, the position of the marker 16 (described later)) with respect to the first scale 13 (that is, relative to the support member 12). (See Figure 3). More specifically, the reading needle 15 has a substantially isosceles triangle shape, and the scale of the first scale 13 is measured by the apex angle portion of the substantially isosceles triangle shape. Further, the supported member 14 is provided with a marker 16 for defining, as a reference position, the position in the width direction of the first register mark (indicated by reference symbol P in FIG. 3) in the belt-like web. Specifically, the marker 16 has a substantially square frame, a transparent plate fixed to the frame, and a substantially cross shaped mark 16a formed on the plate. . In addition, the first alignment unit 10 includes an advancing and retracting mechanism 18 (described later) for advancing and retracting the markers 16 toward the belt-like web (that is, in the left and right direction in FIG. 2).

  In addition, the first alignment unit 10 causes the mark portion 16a of the marker 16 to substantially coincide with (specifically, overlap) the predetermined portion of the first register mark, thereby forming the first in the belt-like web. The position in the width direction of the register mark of is specified as a reference position. As described above, the first alignment unit 10 is provided at a predetermined distance from the belt-like web (see FIG. 2). For this reason, when defining the position in the width direction of the first register mark in the belt-like web as the reference position, the operator looks into the marker 16 from the left side in FIG. 2 to the right direction. In this state, the position in the width direction of the first register mark is defined as the reference position by substantially matching the mark portion 16a of the marker 16 with the predetermined portion of the first register mark. .

  More specifically, as indicated by the reference symbol P in FIG. 3, the first register marks printed on the strip web have a substantially right triangle shape. Therefore, in the first alignment portion 10 according to the present embodiment, two sides sandwiching an angle which is substantially a right angle in the first register mark which is a substantially right triangle shape, and a substantially cruciform mark portion 16a are substantially formed. The position in the width direction of the first register mark at the time of coincidence is defined as a reference position (see FIG. 8).

  In addition, as described above, the first printing unit 140 has the plate cylinder 142 and the like, and the plate cylinder 142 is provided with the mark giving unit 143 for giving the second register mark to the belt-like web. (See Figure 4). More specifically, the marking unit 143 has a substantially right-triangular shape so that a second registration mark having a shape substantially the same as the first registration mark can be applied to the belt-like web. ing. In FIG. 4, the belt-like web is conveyed downward, and the plate cylinder 142 rotates clockwise when viewed from the right to the left in FIG. Because of this, the direction of the second register mark applied to the belt-like web by the mark application unit 143 is substantially the same as the first register mark (indicated by reference symbol P in FIG. 3).

  Further, as shown in FIG. 4, the second alignment portion 30 has a support member 32 extending along the width direction of the belt-like web. In addition, a second scale 33 having a scale is attached to the support member 32 so as to extend along the width direction of the belt-like web. Further, a supported member 34 is attached to the support member 32 so as to be movable along the extending direction of the support member 32 (that is, the left and right direction in FIG. 4). Further, the supported member 34 is provided with a fixing mechanism (not shown) so that the position of the supported member 34 with respect to the support member 32 can be fixed. As a result, the supported member 34 is moved by the respective constituent members of the first printing unit 140 and the second printing unit 150 at the time of performing the second printing, the vibration applied to the supported member 34 from the outside of the apparatus, etc. Can be prevented.

  In the supported member 34, the reading needle 35 for measuring the position of the supported member 34 (that is, the position of the display member 36 (described later)) with respect to the second scale 33 (that is, with respect to the support member 32). It is provided. More specifically, the reading needle 35 has a substantially isosceles triangle shape, and the scale of the second scale 33 is measured by the apex angle portion of the substantially isosceles triangle shape. Further, in the supported member 34, the position of the first register mark in the belt-like web and the position of the second register mark applied to the belt-like web by the marking unit 143 of the plate cylinder 142 are made to substantially coincide. A display member 36 for displaying such a target position (indicated by reference symbol S in FIG. 4) on the outer peripheral surface of the plate cylinder 142 is provided. Further, as shown in FIG. 4, in the second alignment portion 30 according to the present embodiment, the shape projected onto the outer peripheral surface of the plate cylinder 142 is substantially the same cross shape as the mark portion 16 a.

  Further, the display member 36 is configured of a projector, and the target position (indicated by reference symbol S in FIG. 2) of the marking unit 143 is projected on the outer peripheral surface of the plate cylinder 142 by the projector. (See Figure 2). The target position is determined based on the position of the first register mark in the width direction of the belt-like web, the distance between the first alignment unit 10 and the plate cylinder 142, the circumferential length of the plate cylinder 142, etc. It can be done.

  Further, the relative positional relationship between the first register mark in the belt-like web and the second register mark applied to the belt-like web by the marking unit 143 of the plate cylinder 142 is detected in the supported member 34 A detection unit 38 is provided. More specifically, when the first register mark and the second register mark exist in a predetermined area near the detector 38, the detector 38 detects the first register mark and the second register mark. It is possible to detect the relative positional relationship with the Therefore, based on the information detected by the detection unit 38, it becomes possible to detect the positional deviation of the second register mark with respect to the first register mark in the belt-like web after the reprinting is performed. ing. In other words, based on the information detected by the detection unit 38, it is confirmed that the plate cylinder 142 is at the correct position in the width direction of the plate cylinder 142, and that the plate cylinder 142 is rotating at the correct phase. It is possible to As described above, the supported member 34 is provided with a fixing mechanism (not shown) for fixing the position of the supported member 34 with respect to the support member 32. For this reason, the detection unit 38 compares the first register mark on the belt-like web with the second register mark applied to the belt-like web by the marking application unit 143 while performing the reprinting. The positional relationship can be detected stably.

  Further, as shown in FIG. 5, the support member 12 and the first scale 13 of the first alignment portion 10 and the support member 32 and the second scale 33 of the second alignment portion 30 It arrange | positions in the substantially identical location in the width direction. Also, the first scale 13 and the second scale 33 are configured from substantially the same scale. Therefore, for example, after the scale of the first scale 13 when the supported member 14 is positioned at a certain point is measured by the reading needle 15, the point on the second scale 33 corresponding to the measured scale The center position of the marker 16 of the first alignment unit 10 and the center position of the display member 36 of the second alignment unit 30 are moved by moving the supported member 34 so that the reading needle 35 is positioned at (scale). , And can be positioned at substantially the same location in the width direction of the belt-like web (see the two-dot chain line in FIG. 5). In FIG. 5, the scale formed on the first scale 13 and the second scale 33 is not shown.

  Also, the first scale 13 and the second scale 33 do not necessarily have to be configured from substantially the same scale. More specifically, when there is a one-to-one correspondence between a certain scale on the first scale 13 and a certain scale on the second scale 33, the first scale may be used using different scales. 13 and the second scale 33 may be configured.

  In addition, in the alignment aid 2 according to the present embodiment, the center position of the marker 16 of the first alignment unit 10 when the position in the width direction of the first register mark of the belt-like web is defined as the reference position ( Specifically, when the center position of the mark portion 16a) and the center position of the display member 36 of the second alignment portion 30 are positioned at substantially the same position in the width direction of the belt-like web, the display member 36 Thus, the target position is displayed on the outer peripheral surface of the plate cylinder 142 (see the reference symbol S in FIG. 9). For this reason, it is possible to align the marking unit 143 of the plate cylinder 142 with the target position before starting the reprint, and then start the reprint. This makes it possible to substantially match the position of the first register mark and the position of the second register mark applied to the strip-like web by the marking unit 143 in the reprint, and thus the reprint is performed. It is possible to reduce the printing loss of paper as much as possible.

  Further, the first alignment unit 10 according to the present embodiment is provided with an advancing and retracting mechanism 18 for advancing and retracting the marker 16 toward the belt-like web (see FIG. 6). More specifically, the advancing and retracting mechanism 18 moves the marker 16 toward the strip-like web between the retracted position (indicated by a solid line in FIG. 6 (a)) and the advanced position (indicated by a solid line in FIG. 6 (b)). Are able to move forward and backward. Further, at the retracted position shown in FIG. 6A, the distance between the strip-like web and the first register mark (represented by the reference symbol P in FIG. 6) and the marker 16 becomes relatively large. ing. On the other hand, at the advanced position shown by the solid line in FIG. 6B, the distance between the strip-like web and the first register mark and the marker 16 is relatively small. By this, it is possible to define the position in the width direction of the first register mark as the reference position using the marker 16 in the state where the marker 16 is positioned at the advanced position (see FIG. 6B). The accuracy in defining the reference position of the first register mark can be improved.

  More specifically, as described above, in the first alignment unit 10 of the present embodiment, the operator looks over the first register mark through the marker 16 in a state of facing the strip web. Thus, the position in the width direction of the first register mark is defined as the reference position. In other words, the worker looks into the marker 16 in such a positional relationship as to sandwich the marker 16 between the worker himself and the belt-like web. Further, as described above, the position in the width direction of the first register mark is defined as the reference position at a predetermined position of the first register mark (specifically, the first register mark having a substantially right triangle shape). It is when the two sides sandwiching the substantially right angle in the register mark) and the mark portion 16a of the marker 16 substantially coincide (when they overlap). Therefore, if the worker looks into the marker 16 in a direction (see arrow A in FIG. 6) different from the direction (see arrow B in FIG. 6) orthogonal to the belt-like web conveyance surface There is a problem that the reference position of the first register mark may be erroneously defined when the first register mark is at a position different from the position where the reference position should be originally (see FIG. 7). is there.

  Further, when the position in the width direction of the first register mark is erroneously defined as the reference position as described above, an erroneous target position on the outer peripheral surface of the plate cylinder 142 by the display member 36 as described later. Will be displayed. In addition, when the reference position of the first register mark is erroneously defined, an erroneous target position displayed on the outer peripheral surface of the plate cylinder 142 by the display member 36 should be displayed originally (ie, The magnitude of the distance (displacement) between the target position (when correctly defined as the reference position of the first register mark) and the target position becomes larger as the distance between the marker 16 and the first register mark increases. (See Figure 6). The first alignment unit 10 of the present embodiment can define the position in the width direction of the first register mark as a reference position in a state where the marker 16 is advanced to the advanced position using the advancing and retracting mechanism 18 As such, it is possible to minimize such problems.

  Further, at the retracted position shown in FIG. 6A, the distance between the strip-like web and the first register mark and the marker 16 is relatively large. As a result, when the marker 16 is located at the retracted position, for example, even if the belt-like web has moved slightly to the left in FIG. It can prevent that 16 and a contact.

  Next, the flow of the alignment operation of the plate cylinder 142 in the first printing unit 140 by the alignment aid 2 according to the present embodiment described above will be described using FIGS. 7 to 10. FIG. The alignment support 4 can also align the plate cylinder 152 in the second printing unit 150 in the same manner. Further, in the following description, it is assumed that the impression cylinder 144 is located at the retracted position (indicated by a solid line in FIG. 2).

  First, the operator confirms the position of the first register mark (indicated by the reference symbol P in FIG. 7) by visually observing the belt-like web, and then supports the supported member 14 of the first alignment unit 10 By sliding along the member 12, the position of the first register mark on the strip-shaped web and the position of the mark portion 16a of the marker 16 are made to substantially coincide in the width direction of the strip-shaped web (see FIG. 7). As a result, the position in the width direction of the first register mark in the strip web can be defined by the marker 16 as the reference position.

  Then, by sending the strip-like web in the transport direction (that is, the downward direction in FIG. 7), the delivery of the strip-like web is performed between the position of the first register mark in the strip-like web and the position of the mark portion 16a of the marker 16. Approximately match in direction (see FIG. 8). This enables the marker 16 to define the position of the first register mark in the transport direction of the strip web. In the case where the alignment assisting tool 2 according to the present embodiment is provided, for example, in the printing press 100, the printing press 100 is provided with an inching feed device for moving the strip web in the transport direction. There is. In this case, by using the inching feed device, the position of the first register mark in the conveyance direction of the strip web and the position of the mark portion 16a of the marker 16 are made to substantially coincide in the conveyance direction of the strip web. You may do so.

  Next, the position of the supported member 14 in the width direction of the belt-like web is measured by the reading needle 15 as the value of the scale of the first scale 13. Thereafter, the supported member 34 of the second alignment unit 30 is slid along the support member 32 so that the value of the scale measured by the reading needle 15 substantially matches the value of the scale indicated by the reading needle 35. (See FIGS. 5 and 9). As a result, the center position of the marker 16 of the first alignment portion 10 and the center position of the display member 36 can be made to substantially coincide with each other in the width direction of the strip-like web (see two-dot chain line in FIG. 5). ). Specifically, in the example of the operation of the first alignment unit 10 shown in FIGS. 7 and 8, the reading needle 15 has a ninth scale counted from the left and a tenth scale counted from the left. It is supposed to be located in the middle. Therefore, in the example of the operation of the second alignment unit 30 shown in FIGS. 9 and 10, the reading needle 35 of the second alignment unit 30 counts the ninth scale from the left on the second scale 33. The support member 34 is slid so as to be located at a position between the left and the tenth scale. As a result, the target position (indicated by reference symbol S in FIG. 9) of the marking unit 143 of the plate cylinder 142 is displayed on the outer peripheral surface of the plate cylinder 142 by the display member 36. Then, the supported member 34 is fixed to the support member 32 by a fixing mechanism (not shown) provided on the supported member 34.

  In the above procedure, for example, the operator looks at the marker 16 in a direction (see arrow A in FIG. 6B) different from the direction orthogonal to the conveyance surface of the belt-like web, and is originally set as the reference position. It is assumed that the first register mark which is not at the place where it should be is defined as being at the reference position. In this case, after the position of the supported member 14 which is not at the position to be originally set as the reference position (that is, at the incorrect position) is measured by the reading needle 15, the supported member 14 at this incorrect position is accommodated. The supported member 34 is positioned at the position where the In other words, an incorrect target position is projected on the outer peripheral surface of the plate cylinder 142 by the marker 16. In order to minimize such problems, the position in the width direction of the first register mark is defined as the reference position in a state where the marker 16 is advanced to the advanced position using the advancing and retracting mechanism 18.

  Next, by aligning the plate cylinder 142, the position of the marking unit 143 is aligned with the target position projected on the outer peripheral surface of the plate cylinder 142 (see FIG. 10). More specifically, positioning of the marking unit 143 in the axial direction of the plate cylinder 142 is performed by moving the plate cylinder 142 in the axial direction (that is, the left and right direction in FIG. 10), and the plate cylinder 142 is centered on the axis. The phase of the mark applying unit 143 is also adjusted by rotating as. The operation of moving the plate cylinder 142 and the operation of rotating the plate cylinder 142 may be manually performed by the operator, or when the alignment assisting tool 2 is incorporated in the printing press 100, the operation of the printing press 100 may be performed. It may be performed by using an operation unit or the like.

  Then, the alignment cylinder 4 of the second printing unit 150 is also aligned using the alignment aid 4 according to the same procedure as the procedure described above for the first printing unit 140. When the plate cylinder 152 of the second printing unit 150 is aligned, the second printing unit is located at a position corresponding to the position of the supported member 14 read by the reading needle 15 of the first alignment unit 10. The procedure for positioning the display member 36 of the second alignment unit 30 at 150 is performed. Thus, the alignment operation before the start of the additional printing of the plate cylinder 142 using the alignment aid 4 is completed.

  In addition, in the conventional printing machine, since the above-mentioned alignment assistants 2 and 4 are not provided, the plate cylinder can not be aligned before starting the reprinting, and when the reprinting is started There is a problem that the printing loss of the belt-like web is large. More specifically, in the conventional printing press, the amount of displacement between the first register mark and the second register mark applied to the strip web by reprinting is measured, and the measured amount of displacement is used. Based on this, the position and phase of the plate cylinder are controlled by feedback control of the plate cylinder phase and rotational speed. For this reason, there is a problem that a printing loss of the belt-like web occurs from immediately after the printing until the alignment of the plate cylinder by the feedback control is completed. Also, depending on the phase of the plate cylinder at the time of printing, etc., the first register mark on the belt-like web and the second register mark applied to the belt-like web by reprinting may be largely separated. There is a problem that both register marks may not exist in the detection range of the detection unit. Also, in this case, the amount of deviation between the two register marks can not be detected, and it takes time to adjust the phase and rotational speed of the plate cylinder, which further increases the printing loss. There was a problem of On the other hand, a printing unit 140, 150 provided with the alignment aid 2, 4 and such an alignment aid 2, 4 according to the embodiment described above and a printing comprising such a printing unit 140, 150 According to the machine, such problems can be solved because the plate cylinders 142, 152 can be aligned before starting reprint.

  According to the alignment aid (for example, alignment aids 2 and 4) configured as described above and the printing unit (for example, the first printing unit 140) including such an alignment aid, A first alignment unit 10 installed upstream of the plate cylinder (for example, the plate cylinder 142) in the web transport direction, and a second position installed downstream of the plate cylinder in the strip web transport direction And a mating unit 30. In addition, a first register mark is printed in advance on the belt-like web conveyed continuously, and a mark applying unit (for example, a belt-like web) is provided on the outer peripheral surface of the plate cylinder with the second register mark. A marking unit 143) is provided. Further, the first alignment portion 10 is movable in the width direction of the plate cylinder, and has a marker 16 for defining the position in the width direction of the first register mark in the belt-like web as a reference position. ing. The second alignment unit 30 is movable in the width direction of the plate cylinder, and the position of the first register mark in the belt-like web and the second registration unit provided on the belt-like web by the marking application unit. There is provided a display member 36 for displaying on the outer peripheral surface of the plate cylinder the target position of the marking unit which substantially matches the position of the register mark. Therefore, by defining the position in the width direction of the first register mark in the strip web as the reference position by the marker 16, the reference position of the first register mark in the strip web defined by the marker 16, and display The display member 36 can be moved so as to substantially coincide with the position in the width direction of the member 36. Then, it becomes possible to align the plate cylinder so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder by the display member 36. Printing loss can be reduced as much as possible.

  Further, in the alignment aid according to the present embodiment, as described above, the display member 36 sets the target position of the marking unit (for example, the marking unit 143) to the outer periphery of the plate cylinder (for example, the plate cylinder 142). Since the projector projects onto the surface, the display member 36 can project the target position on the outer peripheral surface of the plate cylinder from a position separated from the plate cylinder. Further, the first alignment portion 10 further includes a first scale 13 extending along the width direction of the strip-like web, and the position of the marker 16 in the width direction of the strip-like web by the first scale 13. Can be measured. Further, the second alignment portion 30 further includes a second scale 33 extending along the width direction of the belt-like web, and the second scale 33 causes the display member 36 to extend in the width direction of the belt-like web. The position can be measured. By this, based on the measurement result by the first scale 13 and the second scale 33, the positions of the first alignment unit 10 and the second alignment unit 30 in the width direction of the belt-like web can be made to substantially coincide. become able to.

  Further, in the alignment aid according to the present embodiment, as described above, the first register mark in the belt-like web, and the first web attached to the web by the marking unit (for example, the marking unit 143) Since the detection unit 38 for detecting the relative positional relationship with the two register marks is further provided, displacement of the second register mark with respect to the first register mark in the belt-like web after the reprinting is performed Can be detected. In addition, since the first alignment unit 10 further includes an advancing and retracting mechanism 18 for advancing and retracting the marker 16 toward the belt-like web, the marker 16 more accurately defines the reference position of the first register mark. You will be able to

  Further, according to the method for aligning a printing cylinder according to the present embodiment, as described above, the step of defining the position in the width direction of the first register mark in the strip web as the reference position by the marker 16; Of the display member 36 in the width direction of the plate cylinder (for example, the plate cylinder 142) such that the reference position of the first register mark in the belt-like web defined by And the target position of a marking unit (for example, the marking unit 143) provided on the outer circumferential surface of the plate cylinder for applying the second register mark to the belt-like web by the display member 36 Align the plate cylinder so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder. And it includes cormorants and step. Therefore, by defining the position in the width direction of the first register mark in the strip web as the reference position by the marker 16, the reference position of the first register mark in the strip web defined by the marker 16, and display The display member 36 can be moved so as to substantially coincide with the position in the width direction of the member 36. Then, the plate cylinder is aligned so that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder by the display member 36. According to such a method of aligning the plate cylinder, the plate cylinder can be aligned before the start of the second printing, and therefore, it is possible to minimize the printing loss at the time of second printing.

  Note that the alignment aid according to the present embodiment is not limited to the above-described aspect, and various modifications can be made.

  For example, in the first alignment unit 10 and the second alignment unit 30, micro-controls for finely adjusting the positions of the supported member 14 and the supported member 34 in the width direction of the plate cylinder (for example, the plate cylinder 142) A moving mechanism such as a meter may be provided. In this case, it is possible to further improve the alignment accuracy of the plate cylinder.

  Further, the shape of the mark portion 16a of the marker 16 is not limited to the substantially cross shape. Further, the shape of the first register mark is not limited to the substantially right triangle shape. In other words, the shape of the mark portion 16a is determined based on the shape of the first register mark, and it is possible to accurately define the position in the width direction of the first register mark in the strip web as a reference position. It may have any shape as long as it can be shaped.

  Further, the shape in which the target position of the marking unit (for example, the marking unit 143) is displayed on the outer peripheral surface of the plate cylinder (for example, the printing cylinder 142) by the display member 36 is also limited to the substantially cross shape Absent. In other words, the shape for displaying the target position of the marking unit on the outer peripheral surface of the plate cylinder by the display member 36 is determined based on the shape of the marking unit provided on the plate cylinder, and marks the target position. The shape may be any shape as long as it has a shape that allows the portion to be positioned accurately.

  In addition, a slide mechanism may be provided in which the first alignment unit 10 and the second alignment unit 30 slide integrally. In this case, the alignment operation of the plate cylinder (e.g., plate cylinder 142) can be simplified, so that the plate cylinder can be aligned more quickly. Moreover, in this case, the installation of the first scale 13 in the first alignment unit 10 and the installation of the second scale 33 in the second alignment unit 30 can be omitted.

  In addition, the first alignment unit 10 may be provided downstream of the plate cylinder (for example, the plate cylinder 142) and upstream of the second alignment unit 30 in the conveyance direction of the belt-like web. . In this case, the printing loss at the start of the reprint is compared to the above-described configuration (that is, the configuration in which the first alignment unit 10 is upstream of the plate cylinder in the belt-like web transport direction). Although it becomes large, it becomes possible to align the plate cylinder before the start of the reprint. In this case, the first alignment unit 10 and the second alignment unit 30 may be integrally configured.

  In addition, alignment aids 2 and 4 according to the present embodiment are provided to a printing machine 200 (see FIG. 11) which does not have a component corresponding to the infeed roller 120, which is different from the printing machine 100 described above. It is also good. More specifically, the printing press 200 includes a delivery unit 210 for delivering a strip-like web, and a transport unit (specifically, an outfeed roller 260 etc.) for delivering the strip-like web delivered from the delivery unit 210. It has a pair of pitch control rolls 230, a first printing unit 240 and a second printing unit 250 for printing on a belt-like web conveyed by the conveying unit, and a winding unit 270 for winding the belt-like web ing. Further, the first printing unit 240 and the second printing unit 250 respectively have a plate cylinder 242, 252 and an impression cylinder 244, 254 adapted to supply the ink to the outer peripheral surface thereof. The first printing unit 240 and the second printing unit 250 are provided with the above-described first alignment unit 10 and second alignment unit 30. Even when the alignment aid 2, 4 according to the present embodiment is provided in the printing machine 200 without such in-feed rollers, the position of each plate cylinder 242, 252 before the start of the reprint You will be able to make a match.

2, 4 Alignment Aid 10 First Alignment Unit 12 Support Member 13 First Scale 14 Supported Member 15 Reading Needle 16 Marker 16a Mark Unit 18 Advancement Mechanism 30 Second Alignment Unit 32 Support Member 33 Second Scale 34 supported member 35 reading needle 36 display member 38 detection unit 100 printing unit 110 delivery unit 120 infeed roller 130 pitch control roll 140 first printing unit 142 plate cylinder 143 mark applying unit 144 impression cylinder 146, 147 guide roller 150 second Printing unit 152 plate cylinder 154 impression cylinder 156, 157 guide roller 160 outfeed roller 170 take-up unit 200 printing unit 210 delivery unit 230 pitch control roll 240 first printing unit 242 plate cylinder 244 impression cylinder 250 second printing unit 252 plate cylinder 254 impression cylinder 260 Dorora 270 winding section

Claims (8)

An alignment aid for aligning a plate cylinder for performing a reprint on a continuously conveyed strip-like web, comprising:
A first alignment unit disposed upstream of the plate cylinder in the direction of conveyance of the strip-like web;
A second alignment unit disposed downstream of the plate cylinder in the direction of conveyance of the strip-like web;
Equipped with
A first register mark is printed in advance on the continuously conveyed belt-like web,
The outer peripheral surface of the plate cylinder is provided with a mark applying section for applying a second register mark to the belt-like web,
The first alignment portion is movable in the width direction of the plate cylinder, and has a marker for defining a position in the width direction of the first register mark in the belt-like web as a reference position. Yes,
The second alignment unit is movable in the width direction of the plate cylinder, and the second registration unit is disposed on the strip-like web by the position of the first register mark in the strip-like web and the mark applying unit. And a display member for displaying a target position of the marking unit on the outer peripheral surface of the plate cylinder so as to substantially match the position of the register mark.   The alignment assisting tool according to claim 1, wherein the display member is a projector which projects a target position of the marking unit on an outer peripheral surface of the plate cylinder.   The first alignment unit further includes a first scale extending along the width direction of the strip-like web, and the position of the marker in the width direction of the strip-like web is measured by the first scale. The alignment aid according to claim 1 or 2, wherein   The second alignment portion further includes a second scale extending along the width direction of the belt-like web, and the position of the display member in the width direction of the belt-like web is measured by the second scale. An alignment aid according to any of the preceding claims, wherein the alignment aid is adapted to   The detection unit for detecting the relative positional relationship between the first register mark in the belt-like web and the second register mark applied to the belt-like web by the marking application unit is further provided. Alignment aid according to any one of 4).   The alignment aid according to any one of claims 1 to 5, wherein the first alignment unit further includes an advancing and retracting mechanism for advancing and retracting the marker toward the belt-like web. A printing unit for performing a reprint on a continuously conveyed belt-like web,
A conveyance unit that continuously conveys the belt-like web;
A printing unit that performs printing on a strip-like web continuously transported by the transport unit;
Equipped with
In the printing unit, a plate cylinder for supplying ink to the outer peripheral surface thereof, an impression cylinder for pressing a belt-like web toward the plate cylinder, and a position for aligning the plate cylinder Alignment aids are provided,
A first register mark is printed in advance on the belt-like web sent to the printing unit,
The outer peripheral surface of the plate cylinder is provided with a mark applying section for applying a second register mark to the belt-like web,
The alignment aid is disposed downstream of the plate cylinder in the belt-shaped web transport direction, and a first alignment unit installed upstream of the plate cylinder in the belt-shaped web transport direction. And a second alignment unit,
The first alignment portion is movable in the width direction of the plate cylinder, and has a marker for defining a position in the width direction of the first register mark in the belt-like web as a reference position. Yes,
The second alignment unit is movable in the width direction of the plate cylinder, and the second registration unit is disposed on the strip-like web by the position of the first register mark in the strip-like web and the mark applying unit. A printing unit, comprising a display member for displaying on the outer peripheral surface of the plate cylinder the target position of the marking unit that substantially matches the position of the register mark. A method for aligning a printing plate cylinder for performing printing on a printing plate cylinder for performing a secondary printing on a continuously conveyed strip-shaped web on which a first register mark is printed.
Defining a position in the width direction of the first register mark in the strip web as a reference position by a marker;
The display member is moved along the width direction of the plate cylinder so that the reference position of the first register mark in the strip-like web defined by the markers substantially matches the position in the width direction of the display member And a process of
Displaying on the outer peripheral surface of the plate cylinder a target position of a marking unit provided on the outer peripheral surface of the plate cylinder for applying the second register mark to the belt-like web;
Aligning the plate cylinder such that the position of the marking unit is aligned with the target position of the marking unit displayed on the outer peripheral surface of the plate cylinder;
A method of aligning a plate cylinder, comprising:

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