JP4459600B2 - Ink supply device for rotary printing press - Google Patents

Description

  The present invention relates to an ink supply device for a rotary printing press that enables so-called rainbow printing, in which different colors are printed in a running direction in the width direction of a sheet, for example, to prevent counterfeiting.

  In this type of conventional ink supply apparatus, a plurality of ink weirs are installed in a normal printing ink fountain that performs uniform printing over the entire width so as to be movable in the axial direction of the ink fountain roller. (See, for example, Patent Document 1). In addition, in order to supply ink to the ink fountain roller over a predetermined width, the attachment type ink tray having a fixed interval is fixed to the ink fountain roller and the doctor blade is separated from the ink fountain roller to a rest position. Some are attached to a doctor blade of an ink fountain (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2002-11851 JP-A-9-39208

  Among the conventional techniques described above, in the ink supply device disclosed in Patent Document 1, ink dams must be attached one by one on the printing press during rainbow printing. Adjustment and positioning of the ink weir is difficult, and there is a problem that it takes time and effort. This increases as the number of ink weirs increases. When performing normal printing, all the ink weirs set as described above must be removed one by one, which is troublesome. In short, it takes a lot of time to switch between normal printing and rainbow printing. There was a problem of requiring labor.

  On the other hand, the ink supply device disclosed in Patent Document 2 is for printing only within a narrow range with a wide printing press, and cannot be applied to wide rainbow printing. It was. In addition, since the ink tray of this prior art is mounted on the doctor blade at a doctor blade rest position where the doctor blade is separated from the ink fountain roller, the ink tray is positioned with respect to the ink fountain roller with high accuracy. Could not do.

The present invention solves the above-mentioned conventional problems, can change the ink tray for wide rainbow printing in a short time with respect to the ink fountain device, and each ink weir separated by a large number of ink weirs. It is an object of the present invention to provide an ink supply device for a rotary printing press that can accurately align the interval, and the device comprises an ink tray that is detachably installed in the ink tray. A base that is detachably fixed to the blade of the ink fountain device, a side wall that is formed in a shape in which the tip is circumferentially contacted along the peripheral surface of the ink fountain roller, and is fixed to both ends of the base; A plurality of ink weirs formed on the base, each having a predetermined interval between both side walls, the tip of which is formed in a shape that makes contact with the circumferential surface of the ink fountain roller; Direction while being arranged without gaps between and between each ink dam with ink dam, a dividing blade tip facing the ink fountain roller, is supported on the crosspiece member which is provided on the rear end of the base by the ink dam longitudinal Ink dam adjusting means for moving and adjusting and dividing blade adjusting means for moving and adjusting the dividing blade in the front-rear direction. A plurality of ink trays having different numbers and intervals of ink weirs are selectively attached to the ink fountain device.

ADVANTAGE OF THE INVENTION According to this invention, the setup change of the ink tray for wide rainbow printing with respect to an ink fountain apparatus can be performed in a short time. And the interval between the ink weirs provided over the ink tray can be accurately aligned by the dividing blade located between each side wall and the ink weir and between each ink weir , and the ink tray is used. Since the ink tray can be mounted on the blade of the ink fountain device in a state, the ink tray can be accurately positioned with respect to the ink fountain roller.

  The ink tray is assembled outside the ink fountain device and can be set in the ink fountain device, so that the ink tray having a large number of ink weirs and dividing blades can be easily assembled and washed.

  Further, the position of each ink weir and the dividing blade with respect to the ink fountain roller can be adjusted one by one for each ink weir and the dividing blade, and the printing density and the like can be adjusted easily and in a short time.

  In FIG. 1, reference numeral 1 denotes an ink fountain device. The ink fountain device 1 includes an ink fountain roller 3 that is supported by left and right frames 2a and 2b and is rotated in the direction of the arrow, and a left and right frame 2a and 2b. The blade base 4 is provided in parallel with the ink fountain roller 3, and a long plate-like blade 5 whose tip is in contact with the periphery of the ink fountain roller 3 is placed on the blade base 4 via a holder or the like. Is fixed. Then, both ends of the space formed by the ink fountain roller 3 and the blade 5 are closed by side walls 6a and 6b fixed to the blade base 4 while being in sliding contact with both end surfaces of the ink fountain roller 3. Ink can be put in. The ink film gap formed by the circumferential surface of the ink fountain roller 3 and the tip of the blade 5 faces the lower surface of the tip of the blade 5 as shown in FIGS. Are adjusted by a large number of adjusting screws 7 provided in the axial direction. The ink fountain device 1 is rested by rotating upward so that the portions except the ink fountain roller 3 are separated from the ink fountain roller 3 by a lever (not shown). Further, support pins 10 and 10 for supporting an ink tray 9 (described later) project upward from both sides of the rear end of the blade base 4 of the ink fountain device 1.

  The ink tray 9 is detachably mounted in the ink fountain device 1. The ink tray 9 has a base 11 that is placed on the blade 5 of the ink fountain device 1 without a gap. Holes 12 and 12 are provided on both sides of the rear end of the base 11. When 11 is placed on the blade 5, the holes 12, 12 are engaged with the support pins 10, 10 provided on the blade base 4 and positioned. 13 and 13 are set screws provided with their tips facing the holes 12 and 12. By screwing the set screws 13 and 13, the support pins 10 and 10 are pressed at the tips of the base screws 11 and 13, respectively. It is positioned and fixed on the blade 5 via the support pins 10 and 10. The holes 12 and 12 are elongated holes that are long in the front-rear direction (perpendicular to the axial direction of the ink fountain roller 3), and have a slight margin in the front-rear direction with respect to the ink fountain device 1.

  Hereinafter, the configuration of the ink tray 9 will be described in a state where the base 11 thereof is mounted in the ink fountain device 1. At this time, the tip of the base 11 is separated from the ink fountain roller 3.

Side walls 14a and 14b, which are formed in a concave circle whose tip is in contact with the ink fountain roller 3, are fixed to both ends of the base 11, and handles 15 and 15 are attached to the side walls 14a and 14b, respectively. Further, a crosspiece member 16 that is long in the left-right direction (the axial direction of the ink fountain roller 3) is fixed to the upper surface of the rear end of the base 11. And has a plurality of ink dams 17 on the front side of the crosspiece member 16 is disposed at a predetermined interval in the lateral direction abut against the lower edge to the upper surface of the base 11, between the each ink dam 17, and left and right The dividing blades 18 are arranged between the ink weirs 17 at both ends and the side walls 14a, 14b, and the ink weirs 17 are positioned in the left-right direction by the dividing blades 18 so that the interval between the ink weirs is set. ing.

  At the rear end of each divided blade 18 and in the center in the width direction of each divided blade 18, the tip of an adjusting screw 19 provided by screwing the crosspiece member 16 in the front-rear direction is opposed to each adjusting screw 19. Thus, each divided blade 18 can be moved and adjusted in the forward direction. The end of the adjusting screw 19 has a hole shape, and the tip of the adjusting screw 19 is fitted into the hole.

  On the other hand, the base 11 has a window 20 cut out in a window frame shape at a portion facing the lower surface of the split blade 18. And the pin 21 is provided in the lower surface of each division | segmentation blade 18 which opposes this extraction window 20. As shown in FIG. A hook pin 22 is provided at the rear edge portion of the extraction window 20 of the divided blade 18 at a position facing the pin 21 of each of the divided blades 18 so that each hook portion protrudes into the extraction window 20 to move in the front-rear direction. It is fixed by screwing on. Reference numeral 23 denotes a lock nut. A tension spring 24 is stretched between each pin 21 and the hook portion of the hook pin 22, and each split blade 18 is urged rearward by each tension spring 24. A magnet 25 is provided at a portion of each divided blade 18 facing the base 11, and the divided blade 18 is fixed to the base 11 side by the magnet 25.

  A horizontal bar 26 is provided on the upper side of the crosspiece member 16, and a number of hook members 27 corresponding to the ink weirs 17 can be engaged with and disengaged from the horizontal bar 26, can be moved in the axial direction, and can be further rotated. A bracket 30 having an engagement pin 29 that is detachably engaged from above with a groove 28 provided on the upper edge of the base end portion of each ink weir 17 is supported by each hook member 27 via a turnbuckle 31. The ink weir 17 is moved and adjusted in the front-rear direction via the bracket 30 by the operation of the turnbuckle 31.

  The ink weir 17 is configured as shown in FIG. 5. The lower edge of the ink weir 17 is in contact with the blade 5 of the ink fountain device 1, and the groove 28 is engaged with the engaging pin 29 of the bracket 30 in this state. The tip of the groove is concave so that the ink fountain roller 3 is in sliding contact. The tip portion that is in sliding contact with the ink fountain roller 3 is made of a material having wear resistance and elasticity, for example, silicon rubber having a hardness of 90 degrees. And the groove | channel 32 is provided in the circumferential direction at the front-end | tip of this. The main body of the ink weir 17 is made of BS material as an example.

  In the above configuration, the ink tray 9 is inserted on the blade 5 of the ink fountain device 1, and the holes 12 and 12 of the base 11 are engaged with the support pins 10 and 10 provided on both sides of the rear end of the blade base 4 to push the ink tray 9. By tightening the screws 13, 13, the screws 13 are positioned and mounted in the ink fountain apparatus 1. In this state, rainbow printing is performed by putting predetermined ink between predetermined ink weirs.

  At this time, the strength of contact between the ink fountain roller 3 at the tip of each ink weir 17 is a problem in the progress of color mixing of the ink between the ink dams 17 on the peripheral surface of the ink fountain roller 3. The turnbuckle 31 is adjusted to move the ink weir 17 in the front-rear direction.

  The thickness of the ink supplied between the ink weirs 17 on the peripheral surface of the ink fountain roller 3 is adjusted by an adjusting screw 19. That is, when the adjusting screw 19 is screwed, the split blade 18 is pushed forward against the pulling spring 24, and the gap between the tip of the split blade 18 and the peripheral surface of the ink fountain roller 3 is reduced. Further, by loosening the adjusting screw 19, the dividing blade 18 is moved away from the ink fountain roller 3 by the urging force of the pulling spring 24, and the gap between the tip of the ink fountain roller 3 and the ink fountain roller 3 is increased. The ink film is adjusted depending on the size of the gap. The urging force of the tension spring 24 at this time is adjusted by the hook pin 22.

  The ink tray 9 having the above configuration is prepared in a plurality of sets in which the intervals of the ink weirs 17 are changed according to the printing of each specification and in which the number of the ink weirs 17 is changed, and this is set according to the printing specifications. Use properly.

It is a division | segmentation perspective view which abbreviate | omits and shows this invention apparatus partially. It is a top view which fractures | ruptures and shows a part of ink tray. It is a side view of an ink tray. It is AA arrow sectional drawing of FIG. It is a partially broken perspective view showing an ink weir.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ink fountain apparatus, 2a, 2b ... Frame, 3 ... Ink fountain roller, 4 ... Blade stand, 5 ... Blade, 6a, 6b, 14a, 14b ... Side wall, 7 ... Adjustment screw, 9 ... Ink tray, 10 ... Support Pin, 11 ... Base, 12 ... Hole, 13 ... Push screw, 15 ... Handle, 16 ... Crosspiece member, 17 ... Ink weir, 18 ... Split blade, 19 ... Adjustment screw, 20 ... Extraction window, 21 ... Pin, 22 ... Hook pin, 23 ... lock nut, 24 ... tension spring, 25 ... magnet, 26 ... horizontal bar, 27 ... hook member, 28, 32 ... groove, 29 ... engagement pin, 30 ... bracket, 31 ... turnbuckle.

Claims (2)

An ink fountain roller, a blade provided on a blade base parallel to the ink fountain roller with its tip in contact with the peripheral surface of the ink fountain roller, and side walls that close both axial ends of the ink fountain roller of the blade It consists of an ink fountain device and an ink tray that is detachably installed in the ink fountain device .
This ink tray
A base that is detachably fixed to the blade of the ink fountain device, a side wall that is formed in a shape that is circumferentially contacted along the circumferential surface of the ink fountain roller, and that is fixed to both ends of the base, and a tip that A plurality of ink weirs formed on the base and having a predetermined interval between the side walls, and formed between the side walls and the ink weir; An ink weir that is arranged without gaps between each ink weir and that is supported by a split blade whose tip is opposed to the ink fountain roller and a cross member provided at the rear end of the base, and that moves the ink weir in the front-rear direction. An ink supply device for a rotary printing press, comprising: an adjusting means and a dividing blade adjusting means for moving and adjusting the dividing blade in the front-rear direction. 2. An ink supply device for a rotary printing press according to claim 1, wherein a plurality of ink trays having different numbers and intervals of ink weirs are selectively attached to the ink fountain device.

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