JP2010228125A - Ink-fountain apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink-fountain apparatus that achieves improvement in the reproducibility of zero point adjustment and improvement in adjustment difficulty while achieving the prevention of ink leakage. <P>SOLUTION: An ink-fountain apparatus (1) has: an ink fountain roller (2); an ink dam (3); an ink-fountain body (10) having a stepped part (11) formed at its upper part; a link (31) provided with an eccentric wheel (35) that is oscillated inside the body (10) by a drive force so as to eccentrically move; a link holder (30) that pivotally supports the link (31) while being placed on the stepped part (11); and an ink blade (20) that is always in contact with the eccentric wheel (35) and movable in the forward/backward direction while being placed on the stepped part (11). The inner wall of the stepped part (11) of the ink-fountain body and the rear end of the link holder (30) are closely fixed. Zero-point adjustment is executed by moving the ink blade (20) with eccentricity while making the pivotal-support position of the eccentric wheel (35) related to the oscillation of the link (31) constant. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ink fountain device for a printing press, and in particular, an ink fountain device with improved reproducibility of zero point adjustment for adjusting the zero point accompanying movement of an ink blade, which has been a problem for many years, and prevention of ink leakage. About.

  The ink fountain device that supplies ink to the plate cylinder of the printing machine is equipped with an ink fountain roller that rotates at a low speed to the ink fountain that stores ink, and is fed by the rotation of the ink fountain roller. There are provided a plurality of ink blades that make the ink a necessary thickness. This ink blade is formed in the shape of a rectangular parallelepiped in the axial direction of the ink base roller, and the ink supply amount in the width direction is adjusted by individually adjusting the gap between each ink blade and the ink base roller. can do.

  As an ink fountain device for adjusting the ink supply amount, the present applicant has proposed an ink fountain device shown in Patent Document 1. As shown in FIG. 9, the essential parts of the ink fountain device for adjusting the amount of ink include an ink blade 71, a link holder 74, a zero-point adjusting screw shaft 78, and a lower portion of the zero-point adjusting screw shaft 78. And a link moving shaft 86.

  The ink blade 71 has a rectangular parallelepiped shape and is disposed on the upper part of the ink fountain main body 70. The ink blade 71 has a vertical end in contact with an ink fountain roller (not shown) on the front side (right side in the drawing). A connection piece 72 is provided which is thinned to about half the width of the blade 71 and has a semicircular recess 73 formed in the lower part. The link holder 74 includes a U-shaped holding portion 76 that holds the link 75 for moving the ink blade 71 via the support shaft 83, and a cylindrical connecting portion 77 in which a screw groove is screwed. Have. The zero-point adjusting screw shaft 78 has a round bar shape, a thread groove is screwed at the tip thereof, a flange 79 having a large diameter is provided at a substantially central portion, a driver groove 80 is provided at the rear end, and the flange 79 and the nut are provided. 84 is in contact with each other so that it can rotate but cannot move forward and backward. A spring 81 is contracted between the end face of the connecting portion 77 of the link holder 74 and the flange 79.

  The link moving shaft 86 has a round bar shape in which a gear 88 that transmits rotation of a motor (not shown) is fixed and a screw groove is screwed at the tip, and a push rod 87 is screwed into the screw groove at the tip. Has been. The push rod 87 is always in contact with the free wheel 85 at the free end of the link 75 to swing the link 75.

  To adjust the zero point of the ink blade 71, the link moving shaft 86 is rotated via a motor to advance the push rod 87, and the link 75 is pushed forward to stop at the zero position. As the link 75 swings, the eccentric ring 82 supported by the support shaft 83 of the link holder 74 is decentered, and the ink blade 71 is moved forward by pushing the wall of the recess 73 in contact with the eccentric ring 82. Alternatively, the tip is brought close to the surface of the ink source roller using a gauge.

  Next, the zero point adjustment screw shaft 78 is slightly reversed to the left or right, and the zero point adjustment is performed with the tip of the ink blade 71 being brought close to the ink base roller. The retraction amount is measured by a potentiometer (not shown), and the mechanical zero point by the screw shaft 78 and the electric zero point by the motor drive are matched by performing a manual operation based on the measurement.

  The movement of the ink blade 71 to the position where the zero point is set depends on the eccentricity of the eccentric ring 82 of the link 75 that pushes the wall of the recess 73. However, since the zero-point adjusting screw shaft 78 connected to the link holder 74 supporting the link 75 is supported by the spring 81, the link holder 74 cannot be fixed when the link 75 is swung. There is a problem that fine movement is caused in the direction, the reproducibility of the zero point is poor, and it is difficult to match the mechanical zero point and the electric zero point.

Furthermore, since the zero point adjusting screw shaft 78 and the link moving shaft 86 are in different positions in the ink fountain body 70, there is a problem that it is difficult to perform zero point adjustment.
Holes for installing the zero-point adjusting screw shaft 78 and the link moving shaft 86 are drilled, and each part is assembled in the hole, so that the work becomes complicated and assembly errors and dimensional errors are likely to occur. It took time and effort to increase the manufacturing cost.

  On the other hand, there is a gap that allows the ink blade to slide between the ink blade and the cover plate, so that the ink enters through the gap and enters between the ink blades, thereby controlling the movement of the ink blade. There is a problem of inhibiting. Therefore, as described in Patent Document 2, a combination of a magnet sheet and a thin plate, or as described in Patent Document 3, a first cover member that is slidable in the perspective direction with respect to the ink base roller and A structure having a combination of a detachable second cover member that contacts the ink and covers the first cover member is known.

  In the ink leakage prevention device described in Patent Document 2, the magnet sheet placed on the upper surface of the ink blade has flexibility, so that adhesion can be improved and permanent ink can be prevented without causing permanent deformation. In order to secure enough magnetic force to maintain close contact with the top surface, it is necessary to thicken the magnet sheet, and a lot of ink remains on the stepped part of the top surface of the ink fountain body that occurs at the front end and left and right ends of the magnet sheet, cleaning the ink There is a problem that is not easy to use.

  The ink leakage prevention device described in Patent Document 3 is easy and easy to clean the upper second cover in contact with the ink, but if it slides in the direction away from the ink source roller to clean the first cover, There is a risk that the ink remaining at the end of the first cover may be drawn between the blades, and a large amount of ink remains in the stepped portions generated at the front end and the left and right ends of the thick cover, which makes it difficult to use for cleaning the ink. is there.

Japanese Patent No. 4104774 Japanese Patent No. 2932328 Japanese Patent No. 3930086

  The present invention has been made in view of the above problems, and the object of the present invention is to fix a link holder holding an eccentric ring for controlling the advance and retreat of the ink blade to the ink fountain body. In addition to keeping the eccentric ring support position constant, the zero adjustment device and fine adjustment device, which were installed separately, are integrated into one, and two ink reservoir cover sheets are stacked to cover the ink blade. It is to provide an ink fountain apparatus having a reduced thickness.

  In order to achieve the above object, the invention according to claim 1 includes an ink fountain roller 2, ink weirs 3A and 3B, an ink fountain main body 10 having a stepped portion 11 formed in the upper portion thereof, and the inside of the main body 10 by a driving force. The link 31 is provided with an eccentric ring 35 that is oscillated at the center and is eccentric with respect to the center of oscillation, the link holder 30 that supports the link 31 and is placed on the step portion 11, and the link 31 that is placed on the step portion 11. In the ink fountain device 1 having the ink blade 20 that is always in contact with the eccentric ring 35 and is movable in the front-rear direction, the inner wall of the step portion 11 of the ink fountain body and the rear end of the link holder 30 are fixed in close contact. The link 31 has a function of adjusting the zero point by moving the ink blade 20 by the eccentricity of the eccentric ring 35 while keeping the support position (swing center C) of the link 31 constant.

  According to the second aspect of the present invention, an adjustment rod 61 is inserted into a through-hole 60 drilled from the rear portion of the main body 10 toward the step portion 11, and the link holder 30 disposed in the step portion 11 by the adjustment rod 61. The rear end portion is pushed so that the link holder 30 can be advanced in the step portion 11 (see FIG. 8).

  The invention according to claim 3 includes an ink fountain roller 2, an ink weir 3, an ink fountain main body 10 having a stepped portion 11 formed thereon, and an eccentric wheel that swings and moves eccentrically within the main body 10 by a driving force. A link 31 provided with a link 35, a link holder 30 that supports the link 31 and is placed on the stepped portion 11, and an ink blade that is always in contact with the eccentric wheel 35 and is movable in the front-rear direction and placed on the stepped portion 11. In the ink fountain device 1, the push rod 17 that is always in contact with the free end of the link 31 and can be moved forward and backward is screwed into the drive shaft portion 41, the adjusting screw portion 42, the gear portion 43, and the like. An adjustment unit 40 for adjusting the fine movement of the ink blade 20 is provided in the main body 10, and the adjustment screw portion 42 is screwed into a screw groove (X) of a bracket 48 that is suspended from the main body 10. Further, a flange portion 44 formed on the drive shaft portion 41 is in contact with an elastic member (spring) 49, and the gear portion 43 is engaged with a gear 54 of the drive unit 50 and is driven to rotate by a motor 51. This is a configuration.

  In the invention according to claim 4, a mark 461 is provided on a part of the front surface of the boss portion 46 in the adjustment screw portion 42 so that the rotation of the boss portion 46 can be visually confirmed.

  In the invention according to claim 5, the width of the gear portion 43 fixed to the drive shaft portion 41 is set to be twice or more than the width of the gear 54 of the motor 51. , 54 is configured not to be disengaged.

  The invention according to claim 6 includes a plurality of rectangular parallelepiped-shaped ink base rollers 2 that can advance and retreat toward and contact with the outer peripheral surface of the ink base roller 2 and are arranged in parallel in the axial direction of the ink base roller 2. In the ink fountain device 1, which includes the ink blade 20, the cover plates 4 and 5 covering the upper surface of the ink blade 20, and the ink weirs 3 </ b> A and 3 </ b> B disposed on the left and right side surfaces of the cover plates 4 and 5, The cover plates 4 and 5 covering the upper surface of the blade 20 are made of two upper and lower sheets, and the upper cover plate 5 is detachably attached to the lower cover plate 4 and is a thick metal having rigidity to work with magnetism. The lower cover plate 4 is a flexible and thin plate that is less affected by magnetism.

  According to the first aspect of the invention, the inner wall of the step portion 11 formed on the upper part of the ink fountain main body 10 and the rear end of the link holder 30 are fixed in close contact with each other, and the support position (C) with respect to the swing of the link 31 Since the zero point adjustment is performed by moving the ink blade 20 according to the eccentricity of the eccentric ring 34 with a constant value, the link holder 30 does not slightly move and the zero point adjustment is not shifted as in the prior art, and the zero point adjustment is reproducible. Improved.

  According to the second aspect of the present invention, the adjustment rod 61 is inserted from the rear portion of the main body 10 toward the stepped portion 11, and the link holder 30 can be advanced by the adjustment rod 61. Even if the ink blade 20 is not changed, the position of the ink blade 20 can be newly adjusted, and the link holder 30 can be fixed again so that the ink blade 20 can be adjusted without changing the reproducibility of the zero point adjustment. .

  According to the third aspect of the present invention, the drive shaft portion 41 having the flange 44 screwed to the push rod 17 capable of moving forward and backward that always contacts the free end of the link 31, and the elastic member at the rear portion of the drive shaft portion 41. 49, an adjustment screw portion 42 having a leg portion 47 and an end portion abutting on the flange 44 through 49, and a gear portion 43 fixed to the drive shaft portion 41 and meshed with the gear 53 of the motor 51. The adjustment unit 40 is provided in the main body 10, so that the drive shaft portion 41 and the adjustment screw portion 42 have been operated separately from each other. In addition, the position of the ink blade 20 can be adjusted while viewing the color of the ink source roller 2 by rotating the adjusting screw portion 42 during printing.

  According to the fourth and fifth aspects of the present invention, the mark 461 is formed on a part of the front surface of the boss portion 46 in the adjustment screw portion 42, and the width of the gear portion 43 fixed to the drive shaft portion 41 is set to the gear 54 of the motor. Therefore, even if the gear 43 of the drive shaft moves in the front-rear direction due to the rotation, the gear of the motor can be checked. The preset data can be used as a reference without deviating from 53, and the zero point indicated by the machine can be matched with the zero point indicated by electricity.

  According to the invention of claim 6, the cover plates 4 and 5 covering the upper surface of the main body 10 are made of two upper and lower sheets, and the upper cover plate 5 is detachably attached to the lower cover plate 4 and is magnetic. Since the lower cover plate 4 is a flexible thin plate with less magnetic influence, the lower cover plate 4 is placed on the ink blade 20 when cleaning the cover plate. The ink can be washed while being mounted, and the ink remaining on the step between the front end and the ink fountain upper surface on both sides is small and can be easily removed, so that the ink does not enter between the ink blades 20 or into the main body.

Sectional drawing of the ink fountain apparatus which concerns on 1st Embodiment of this invention. The figure which shows engagement of a link holder and a link by A arrow view of FIG. Sectional drawing of an adjustment screw and a drive shaft. The front view by another embodiment of the elastic body of an adjustment screw. The partial cross section side view of FIG. The figure which shows the structure state of the cover plate of an ink fountain. The figure which shows the state which accumulated the cover plate. The figure which shows the link holder and adjustment bar of the level | step-difference part which concern on 2nd Embodiment. The partially enlarged view which shows the action mechanism for the conventional zero point adjustment.

  An ink fountain apparatus 1 shown in FIG. 1 includes an ink fountain roller 2 that is supported by a frame of a printing machine (not shown) and rotates, an ink fountain body 10 that is a rectangular parallelepiped having substantially the same length as the ink fountain roller 2, and a main body 10 The ink weirs 3A and 3B are arranged on both side surfaces of the upper surface, and two cover plates 4 and 5 that cover the upper surface of the main body 10. The ink source roller 2 has a front surface and a cover plate 5 has a bottom surface. However, both sides are surrounded by ink weirs 3A and 3B to form a substantially triangular ink fountain, and the ink is stored in the ink fountain.

  A step portion 11 having a right angle between the wall surface and the bottom surface is formed on the upper surface of the rectangular main body 10, and a plurality of ink blades 20 and a plurality of link holders 30 are accommodated in the step portion 11. ing. A first space 12 is defined below the step portion 11 at the central portion of the main body 10, and a link 31 is suspended in the first space 12, and the return rod 15 and the push rod 17 are connected to the first space 12. Facing the inside of the space 12. A second space 13 is defined in the lower part of the rear side of the main body 10 on the side opposite to the ink source roller 2, and an adjustment unit 40 and a drive unit 50 that finely move the ink blade 20 facing the second space 13; Is arranged.

  The ink blade 20 has a rectangular parallelepiped shape made of a magnetic material, and a large number of ink blades 3A, 3B are arranged on the step portion 11 of the main body 10 at a position extending across the entire length between the left and right ink weirs 3A, 3B. The right end and the rear end are inclined to the right diagonal taper. A rectangular space 21 is defined in the center of the ink blade 20, and an L-shaped spring receiver 22 having one end screwed to the main body 10 is disposed in front of the space 21. A blade return spring 23 is contracted between the spring receiver 22 and the rear wall in the space 21, and the blade return spring 23 urges the ink blade 20 to always move away from the ink source roller 2. .

  As shown in the plan view of FIG. 2, the link holder 30 made of a magnetic material having a rectangular shape has a U-shaped cross section in which the front side walls 32 on the ink blade 20 side extend forward, and the rear portion of the main body 10. It is a vertical wall that is in close contact with the wall surface of the stepped portion 11, and is screwed to the stepped portion 11 via a bolt 33 in a state where the wall surface of the stepped portion 11 and the vertical wall are in contact with each other and fixed to the main body 10. Yes. A support shaft 34 is horizontally mounted in a hole drilled in the U-shaped side walls 32 of the link holder 30, and an eccentric ring 35 slightly decentered with respect to the support shaft 34, and left and right sides sandwiching the eccentric ring 35. The eccentric plate 35 and the holding plate 36 constitute the upper portion of the link 31. The rear end of the ink blade 20 urged by the spring 23 is always in contact with one side surface of the eccentric ring 35, and the ink blade 20 moves in the front-rear direction by the eccentric operation of the eccentric ring 35.

  The left and right holding plates 36 sandwiching the eccentric ring 35 are formed in a strip shape, and the other end of the suspension plate sandwiches the center of a disc-shaped idler ring 37. In this manner, the link 31 is disposed in the first space 12 defined in the main body 10, and one end of the link 31 is pivotally attached to the support shaft 34 fixed to the both side walls 32 of the link holder 30. The other end of the link 31 is a free end, and can be swung with the support shaft 34 as a swing center C.

  The return rod 15 and the push rod 17 are in contact with the left and right surfaces of the peripheral wall of the free wheel 37 at the free end of the link 31. The return rod 15 has a bottomed cylindrical shape, and is inserted through a hole formed in the first space 12 facing the ink source roller 2 side of the main body 10 with a link return spring 16 interposed therebetween. The return rod 15 always urges the free wheel 37 of the link 31 in the return direction (leftward) by the elastic force of the link return spring 16.

  The push rod 17 has a bottomed cylindrical shape, and is disposed in a hole formed in the rear of the main body 10 so as to face the first space 12. The push rod 17 is internally threaded with a screw groove screwed to the adjustment unit 40, and the outer side is engaged with a key 18 inserted into a groove cut in the main body 10 to push the push rod. 17 is in a state in which it cannot rotate and can move forward and backward.

  As shown in FIG. 3, the adjustment unit 40 located in the second space 13 of the main body 10 includes a drive shaft portion 41, an adjustment screw portion 42, and a gear portion 43. The drive shaft portion 41 has an elongated round bar shape, and a screw groove that is screwed into the bush rod 17 for a predetermined length is screwed at the tip thereof, and a disk-like flange having a larger diameter than the drive shaft portion 41 is provided at the center. 44 is formed, and a driver groove 45 is recessed in a rear end portion protruding from the rear end of the main body 10.

  The adjustment screw portion 42 is composed of a hexagonal boss portion 46 on one side and a cylindrical leg portion 47 extending to the front thereof, and a center hole having substantially the same diameter as the drive shaft portion 41 is formed in the center. And a rear portion of the drive shaft portion 41 is inserted into the hole. The tip of the leg 47 abuts on the flange 44 formed on the drive shaft 41 so as to be rotatable, and the thread groove screwed on the outer periphery of the leg 47 is for an adjustment screw suspended from the rear end of the main body 10. The screw 48 is in screw contact with a screw groove in a hole provided in the bracket 48. Therefore, by rotating the hexagonal boss portion 46, the push rod 17 screwed to the tip of the drive shaft portion 41 with respect to the bracket 48 moves in the front-rear direction. An adjustment screw return spring 49 is contracted between the surface of the adjustment screw bracket 48 and the washer of the boss portion 46.

  As shown in FIGS. 4 and 5, in place of the adjustment screw return spring 49, a lock nut 401 is screwed into a thread groove screwed on the outer periphery of the leg 47 through a disc spring 402 to prevent fine movement. Then, the rotation of the adjustment screw portion 42 after adjustment may be restricted. In this case, another hole may be drilled in the adjustment screw bracket 48 and the L-shaped stopper 403 may be fixed so that the flat portion of the lock nut 401 and the bottom surface of the stopper 403 abut. .

  Further, for example, a screw for preventing loosening may be applied to the screwing between the hole provided in the adjustment screw bracket 48 and the leg portion 47 of the adjustment screw portion 42 to restrict the rotation after adjustment. A loosening prevention agent may be applied to the adjustment screw portion 42.

  Further, a mark 461 is stamped on a part of the front surface of the boss portion 46 so that the rotation angle and return angle of the boss portion 46 can be visually checked when performing zero point adjustment or fine adjustment, and printing is temporarily performed even if the boss portion 46 is not moved greatly. The ink amount may be easily adjusted to return to the original position.

  The gear portion 43 is inserted from the front end side of the drive shaft portion 41, and is fixed to the round bar portion of the drive shaft portion 41 with screws in a state where one side is in contact with the flange 44, and the second space 13 of the main body 10. Located in. The width of the gear portion 43 is more than twice the width of the second gear 54 in the drive unit 50 to be described later, and the drive shaft 41 moves in the left-right direction in the main body 10 by zero point adjustment or fine adjustment dry operation. Even if it moves to, it always meshes | engages, without sliding between the teeth of the 2nd gearwheel 54, and removing.

  The drive unit 50 is mounted facing the second space 13 below the main body 10 and includes a motor 51, a potentiometer 52, and a gear group. The rotation of the first gear 53 fixed to the shaft of the motor 51 is engaged with the second gear 54 that transmits the rotation of the first gear 53 to the gear portion 43 of the drive shaft 41 and another gear 55 fixed to the shaft of the motor 51. A third gear 56 for the potentiometer 52 is provided.

  As shown in FIGS. 6 and 7, two ink fountain cover plates 4 and 5 are stacked so as to cover the upper surfaces of the ink blade 20 and the link holder 30 disposed in the step portion 11 of the main body 10 and store the ink. It consists of The first cover plate 4 is made of a thin magnetic material having a thickness of 0.2 mm or less, for example, and is in contact with the entire upper surface of the main body 10 and the upper surface excluding the tip portion of the ink blade 20. The second cover plate 5 is made of, for example, a magnetic material having a thickness of 1 mm, and the upper surface is in contact with the stored ink and the lower surface is in contact with the entire surface of the first cover plate 4.

  The first cover plate 4 has the same width as the main body 10, and the front and rear lengths are the rear end of the main body 10, and the front end is the end of the ink blade 20 as shown in FIG. 7. It is formed to be slightly shorter. Holes 6 drilled in a plurality of locations at the rear of the cover plate 4 are penetrated by pins 8 embedded in the main body 10 and slightly projecting at the top, and are mounted on the upper surface of the main body 10 while covering the ink blade 20 and the link holder 30. ing. When placed on the main body 10, the first cover plate 4 is hardly removed, and ink cleaning such as color change can be performed on the main body 10. However, when cleaning due to dirt, the thin plate can be removed without being affected by the magnetic force of the magnet 14 embedded in the main body 10.

  The width | variety of the 2nd cover plate 5 has the same length as the main body 10, and the ink dams 3A and 3B are mounted in the upper surface of both sides. As with the first cover plate 4, holes 7 are formed at a plurality of positions at the rear portion, and a bin 8 is penetrated through the hole 7, and is pressed against the main body 10 side while covering the first cover plate 4. The first cover plate 4 is pressed so as not to move by the magnetic force of the magnet 14, but when cleaning ink such as color change, it is lifted up and removed from the pin 8.

The operation of the first embodiment having the above-described configuration will be described. The ink fountain is formed in a substantially triangular shape by surrounding the bottom surface with the second cover plate 5, the ink weirs 3A and 3B on both sides, and the ink source roller 2 on the front. Ink is injected into this space, and the zero point positions of a plurality of ink blades 20 arranged adjacent to each other on the main body 10 of the ink fountain are set.

  In the zero point adjustment, first, the boss portion 46 of the adjustment screw portion 42 in the adjustment unit 40 is rotated against the force of the adjustment screw return spring 49 using a tool, and the screw groove (X) of the adjustment screw bracket 48 is rotated. Then, the drive shaft portion 41 is advanced to the main body 10 side while slipping to the flange 44 surface in contact with the tip of the leg portion 47, and the push rod 17 is pushed. Since the push rod 17 is in a state in which the push rod 17 is not rotatable and can be moved forward and backward by the key 18 fitted to the main body 10, the idler 37 of the abutting link 31 is swung forward. At this time, the elastic force of the link return spring 18 in the other return rod 15 of the free wheel 37 that is always in contact attempts to prevent the link 31 from moving forward, but the rotational force of the boss portion 46 advances ahead of the elastic force.

  As the free end of the link 31 moves in the right direction in the figure, the eccentric ring 35 supported on the support shaft 34 of the link holder 30 rotates eccentrically, and the rear portion of the ink blade 20 that is always in contact with the blade return spring 23 is rotated. The front end is moved closer to the surface of the ink base roller 2 while resisting this force.

  At this time, since the rear end of the link holder 30 is in close contact with the stepped portion 11 of the main body 10 formed at a right angle and is fixed to the main body 10 by the bolt 33, the position of the support shaft 34 for supporting the link 31 is the other position. Regardless of the movement of the member, the position is always constant, and the forward and backward movement operations of the ink blade 20 by the eccentric shift of the eccentric ring 35 in the zero point adjustment and the ink gap adjustment can be performed precisely.

  After the adjustment unit 40 finishes setting the zero point position of the ink blade 20, ink is injected into the ink fountain.

  The ink supply amount adjustment in the printing operation is performed by operating the motor 51 of the drive unit 50 and rotating the first gear 53 fixed to the shaft of the motor 51 via the second gear 54 in the adjustment unit 40. This is transmitted to the gear portion 43 in the second space 13. Since the gear portion 43 is fixed to the drive shaft portion 41, the screw (Y) at the tip of the drive shaft portion 41 advances or retracts the push rod 17 by rotation thereof, and the link 31 is moved left and right in the first space 12. Swing to adjust the gap between the ink blades 20.

  The width of the gear portion 43 in the second space 13 is not less than double the width of the second gear 54, preferably three times, so that the gear portion 43 can be moved along with the back and forth movement of the drive shaft portion 41. The second gear 54 can be moved back and forth in the second space 13 without being disengaged only by shifting the meshing position, the swing range of the free end of the link 31 can be widened, and the movement of the ink blade 20 is increased. In addition, mechanical adjustment can be performed while maintaining an electrical zero point.

  When printing is finished or when the ink color is changed, the ink fountain is cleaned. For cleaning, the ink fountain is rotated to a horizontal state, and then ink remaining on the cover plates 4 and 5 is wiped off. First, the surface of the second cover plate 5 that has been in contact with the ink is wiped off while washing with a solvent, and the second cover plate 5 is removed from the main body 10 against the magnetic force. The ink on the surface of the first cover plate 4 remaining on the main body 10 is washed again with a solvent. However, since the second cover plate 5 covered the upper surface, a small amount of ink came from the gap. Since the degree of contamination is small and the first cover plate 4 is a thin plate, the stepped portion from the top surface of the main body 10 on the tip and both side surfaces is small, and ink remaining on the step can be easily removed by wiping, and the work efficiency Will also improve.

  Next, as a second embodiment, an ink fountain device in which the position of the link holder 30 can be moved will be described, but the same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. .

  The ink fountain shown in FIG. 8 is provided with a stepped portion 11 in which the link holder 30 supporting the link 31 and the ink blade 20 are accommodated in the upper portion of the main body 10, and a screw hole 60 is formed in the main body 10 behind the stepped portion 11. It has been drilled. An adjusting rod 61 having a hexagonal boss portion 62, a round neck portion 63 and a leg portion 64 is screwed into the screw hole 60. The leg portion 64 faces the step portion 11, and a nut 65 is screwed into a screw groove screwed to the neck portion 63. The nut 65 contacts the rear end surface of the main body 10 to position the adjusting rod 61. ing. The bolt hole formed in the link holder 30 is a long hole in the axial direction, and is pushed by the leg portion 64 of the adjusting rod 61 so that the link holder 30 can be moved slightly to the left and right in the drawing.

  When the tip of the ink blade 20 is worn by contact with the ink base roller 2 and the adjustment screw portion 42 is out of the adjustment range, the nut 65 of the adjustment rod 61 and the bolt of the link holder 30 are loosened, and then the adjustment rod 61, the leg 64 of the ink blade 20 is pushed, the link holder 30 is moved to the ink source roller 2 side against the elastic force of the blade return spring 23 in the ink blade 20, and the adjustment by the operation of the adjustment screw 42 and the drive unit 40 is performed. enable.

DESCRIPTION OF SYMBOLS 1 ... Ink fountain device 2 ... Ink base roller 4 ... 1st cover plate 5 ... 2nd cover plate 10 ... Main body 11 ... Step part 15 ... Return rod 17 ... Push rod 20 ... Ink blade 23 ... Blade return spring 30 ... Link holder 31 ... Link 34 ... Support shaft 35 ... Eccentric ring 37 ... Free wheel 40 ... Adjustment unit 41 ... Drive shaft portion 42 ... Adjustment screw portion 43 ... Gear portion 44 ... Flange 46 ... Boss portion 47 ... Leg portion 50 ... Drive unit 51 ... Motor 53 ... 1st gear 54 ... 2nd gear

Claims (6)

  An ink fountain roller, an ink weir, a main body of an ink fountain having a stepped portion formed thereon, a link provided with an eccentric ring that is oscillated within the main body by a driving force and is eccentric with respect to the center of the oscillating; In an ink fountain apparatus, comprising: a link holder that is mounted on the stepped portion and an ink blade that is placed on the stepped portion and is always in contact with the eccentric ring and is movable in the front-rear direction. Ink fountain device having a function of adjusting the zero point by moving the ink blade by the eccentricity of the eccentric ring while fixing the inner wall of the link portion and the rear end of the link holder in close contact with each other and keeping the link support position constant .   The adjustment rod can be inserted into the through-hole drilled from the rear of the main unit toward the step, and the link holder can be pushed forward in the step by pushing the rear end of the link holder placed on the step. The ink fountain device according to claim 1.   An ink fountain roller, an ink weir, an ink fountain main body having a stepped portion formed thereon, a link provided with an eccentric ring that swings and moves eccentrically in the main body by a driving force, and the step supported by the link In an ink fountain device having a link holder placed on a portion and an ink blade placed on a stepped portion that is always in contact with the eccentric ring and is movable in the front-rear direction, the contact point is always in contact with the free end of the link. An adjustment unit for adjusting the fine movement of the ink blade is arranged in the main body, the tip of which is screwed into a possible push rod, and comprising a drive shaft portion, an adjustment screw portion, and a gear portion. Screwed into a thread groove of a bracket suspended from the flange and abutted with a flange portion formed on the drive shaft portion via an elastic member, and the gear portion meshes with a gear of the drive unit. Ink fountain device which is a configuration that is rotationally driven by a motor to.   The ink fountain device according to claim 3, wherein a mark that allows visual confirmation of rotation of the boss portion is provided on a part of the front surface of the boss portion in the adjustment screw portion.   The width of the gear portion fixed to the drive shaft portion is set to be twice or more than the width of the gear of the motor, and the gears of both gears are not disengaged even when the drive shaft portion moves back and forth. Ink fountain device.   The ink base roller, a plurality of rectangular ink blades arranged in parallel in the axial direction of the ink base roller and capable of advancing, retreating, and contacting the outer surface of the ink base roller, and covering the top surface of the ink blade And an ink fountain device having ink weirs arranged on the left and right side surfaces of the cover plate, the cover plate covering the upper surface of the ink blade is made of two upper and lower sheets, and the upper cover plate is An ink fountain characterized in that it is a thick metal plate that can be attached to and detached from the lower cover plate and has rigidity that allows magnetism to act, and the lower cover plate is a flexible thin plate that is less affected by magnetism. apparatus.

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