JP2010030265A - Ink jar apparatus in printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink jar apparatus of a printer, capable of improving the durability of blades and a jar roller, easily adjusting the gap between the leading edge of each blade and the peripheral surface of the jar roller to a predetermined size and quickly and easily adjusting the original position of the blades. <P>SOLUTION: The blade 21 is mounted to a jar base 14 so as to make a tiltable reciprocating movement, forward and rearward, around a support shaft 22a formed in a support protrusion 22. The blade 21 is energized with a bolt 23 engaged with the jar base 14 and a compression spring 24 in the direction so that the gap G between the outer peripheral surface 13a of the jar roller 13 and the blade 21 becomes smaller. A gap set-up rod 41 is mounted position-adjustably in the forward and rearward direction with respect to the jar base 14. The position of the lower edge part 21e of the blade 21 is regulated, and the gap G in a predetermined size is held so as not to be reduced to zero. A gap adjusting rod 25 is installed so as to reciprocate in the front and rear direction on the rear surface of the blade 21 with respect to the jar base 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ink fountain device in a printing press, and more specifically, in an initial state, a gap for setting an ink supply amount between an outer peripheral surface of a fountain roller and tip edges of a plurality of blades is set to a constant size, and the blade The present invention relates to an ink fountain device in a printing press that can easily set the origin position.

As an ink fountain device in a printing press, a fountain base and a fountain roller are mounted on a frame, an ink reservoir is formed between a bottom plate attached to the upper surface of the fountain base and an outer peripheral surface of the fountain roller, There has been proposed one equipped with a plurality of blades for adjusting the amount of ink supply corresponding to the ink supply port formed between the outer peripheral surface of the pot roller and the leading edge of the bottom plate. Further, in order to adjust the gap formed by the outer peripheral surface of the crucible roller and the leading edge of the blade, a gap adjusting mechanism for reciprocally tilting the blade is mounted between the crucible base and the blade. Patent Document 1 discloses a configuration similar to the above configuration.
JP 2007-237539 A [Gazette pages 4 and 5, paragraph (0017) and FIG. 4]

  In the conventional ink fountain device, an operation is performed in which the gap between the leading edge of the blade of the ink fountain device of the printing press and the outer peripheral surface of the fountain roller is adjusted to be constant in the initial state. Then, an operation of changing and adjusting the gaps of the blades according to the printing conditions is performed with the gaps adjusted to be constant as a reference. The conventional ink fountain device moves the blade in a direction in which the gap decreases by the gap adjusting mechanism, and brings the leading edge of the blade into contact with the outer peripheral surface of the fountain roller. Thereafter, the blades are separated from each other by a predetermined distance, and a certain gap is set between the outer peripheral surface of the crucible roller and the leading edge of the blade. For this reason, since the leading edge of the blade contacts the outer peripheral surface of the crucible roller, there is a problem that the blade and the crucible roller are damaged, and the durability of both members is lowered.

  The present invention eliminates the problems in the prior art described above, improves the durability of each blade and the crucible roller, and provides a constant clearance between the leading edge of each blade and the outer peripheral surface of the crucible roller. An object of the present invention is to provide an ink fountain device in a printing press that can be easily adjusted to dimensions and can adjust the origin position of a blade quickly and easily.

  In order to solve the above problems, the invention according to claim 1 is characterized in that an ink pool is provided between a bottom plate attached to the upper surface of the pot base and the outer peripheral surface of the pot roller. A plurality of blades for adjusting an ink supply amount corresponding to an ink supply port formed between an outer peripheral surface of the pot roller and a front end edge of the bottom plate are attached to the pot base, A clearance adjustment mechanism for adjusting the clearance formed by the outer peripheral surface of the crucible roller and the tip edge of the blade is mounted between the blade and the blade, In the meantime, in the process of moving the blade in the direction of decreasing the gap by the gap adjustment mechanism, gap setting means for stopping the blade and setting the gap to a constant dimension before the gap becomes zero. Setting And summarized in that it was.

  According to a second aspect of the present invention, in the first aspect, the blade is moved in a direction to reduce the gap, and the blade is stopped by the gap setting means, and at the same time, the operation of the gap adjustment mechanism is stopped. The gist is that an operation stopping means is provided.

  According to a third aspect of the present invention, in the first or second aspect, a blade is mounted on the front surface of the crucible so as to be able to reciprocate around a horizontal axis, and between the front surface of the crucible and the blade. And a biasing mechanism for constantly biasing the blade in a direction in which the gap is reduced, and a gap setting rod constituting the gap setting means is attached to the crucible base so as to be in contact with the blade, In a stroke in which the gap adjusting rod constituting the gap adjusting mechanism is reciprocally movable in the front-rear direction in contact with the blade, and the gap adjusting rod is retracted to reduce the gap. The gist is that the blade is in contact with the tip of the gap setting rod.

  According to a fourth aspect of the present invention, in the third aspect, the clearance adjustment rod is configured to be reciprocated on the same straight line by a rotational motion of a motor capable of forward and reverse rotation, and a tip portion of the clearance adjustment rod. Between the blade and the blade, contact presence / absence detecting means for detecting the presence / absence of contact between both members is provided, and the operation of the motor is allowed while the gap adjustment rod is in contact with the blade, When the movement of the blade is stopped by the gap setting rod, and the tip of the gap adjustment rod is separated from the blade and the non-contact state is detected by the contact presence / absence detecting means, the rotation of the motor is stopped, and this state The gist of the present invention is that the origin position of the blade is set on the basis of the position of the blade.

  According to a fifth aspect of the present invention, in the fourth aspect, when the tip of the gap adjusting rod is separated from the blade and the non-contact state is detected by the contact presence / absence detecting means, the forward rotation of the motor is stopped. Thereafter, the motor is reversely rotated by a predetermined number of pulses, and the blade is tilted by a predetermined angle in the direction of increasing the gap, so that the origin position of the blade is set. And

  According to a sixth aspect of the present invention, in the first or second aspect, the movable body is mounted on the upper surface of the crucible so as to be capable of reciprocating linear movement in the front-rear direction, and a blade is connected to the front end of the movable body. A reciprocating mechanism is provided between the crucible and the movable body, and a reciprocating mechanism including a motor capable of rotating forward and backward to reciprocate the movable body. Between the crucible and the movable body, In the process of moving the blade together with the movable body in the direction of reducing the gap, there is provided gap setting means for stopping the movable body and the blade and setting the gap to be constant. Detection means is provided for detecting that the gap is set at a predetermined position by the gap setting means, and when the blade is stopped at the predetermined position by the detection means, the operation of the reciprocating mechanism is stopped, Blade position As a reference, and summarized in that the origin position of the blade is configured to be set.

  According to a seventh aspect of the present invention, in the sixth aspect, the operation of the reciprocating mechanism is stopped, and then the motor is reversely rotated by a predetermined number of pulses, so that the blade increases the gap by a predetermined distance. The main point is that the origin position of the blade is set.

  According to an eighth aspect of the present invention, in the first or second aspect, the blade is mounted on the front surface of the crucible so as to be able to reciprocate around a horizontal axis, and between the front surface of the crucible and the blade. An urging mechanism for urging the blade in the direction in which the gap is reduced is provided, and a screw cylinder is reciprocally rotatable around a horizontal axis parallel to the horizontal axis at the lower end of the blade. A gap adjustment rod that constitutes the gap adjustment mechanism is attached to the crucible so that the gap adjustment rod can rotate forward and backward at a predetermined position, and the male screw portion provided at the outer periphery of the tip of the gap adjustment rod is the screw cylinder In the process of rotating the adjusting rod and reducing the gap, the screw cylinder and the blade are stopped at predetermined positions to set the gap constant. Clearance setting means is provided. Is, the gist that the origin position of the blade is configured to be set with reference to the gap set by the clearance setting means.

  The invention according to claim 9 is the invention according to claim 8, wherein the gap adjusting rod is configured to be rotated by a motor capable of rotating in the forward and reverse directions, and a through hole is formed in a central portion of the gap adjusting rod in the axial direction. The gap setting rod constituting the gap setting means is penetrated through the through hole so that the position of the gap setting rod can be adjusted in the front-rear direction, and the tip of the gap setting rod is provided at the end of the screw hole of the screw cylinder. A contact presence / absence detecting means is disposed between the gap setting rod and the position restricting member so as to come into contact with and separate from the position restricting member, and detects whether or not a tip of the rod has contacted the position restricting member. When the clearance adjustment rod is rotated and the clearance is reduced, when it is detected that the tip of the clearance setting rod is in contact with the position regulating member, the rotation of the clearance adjustment rod is stopped. ,this With reference to the position of the blade condition is summarized in that the home position of the blade is configured to be set.

  According to a tenth aspect of the present invention, in the ninth aspect, the rotation of the gap adjusting rod is stopped, and then the motor is rotated backward by a predetermined number of pulses, so that the blade increases the gap by a predetermined distance. The main point is that the origin position of the blade is set.

(Function)
According to the present invention, the clearance does not become zero in the stroke in which the blade is moved in the direction in which the clearance between the outer peripheral surface of the pot roller and the tip edge of the blade is reduced by the clearance adjustment mechanism. Then, the blade is stopped at a predetermined position by the gap setting means, the gap is set to a predetermined size, and the origin position of the blade is set with reference to this gap.

  According to the present invention, when adjusting the gap between the leading edge of each blade and the outer peripheral surface of the crucible roller, the leading edge of the blade does not come into contact with the outer peripheral surface of the crucible roller and the gap does not become zero. Therefore, it is possible to prevent the tip edge of the blade from coming into contact with the outer peripheral surface of the crucible roller and damaging the crucible roller and the blade. In addition, since the gap adjusting mechanism and the gap setting means are both mounted between one crucible base and the blade, the present invention improves the assembly accuracy of the gap and repeats the gap adjusting operation. However, the adjustment accuracy can be maintained. Furthermore, according to the present invention, the gap can be easily adjusted to a predetermined size, and the adjustment operation of the blade origin position can be performed quickly and easily.

(First embodiment)
Hereinafter, a first embodiment of an ink fountain device in a printing machine embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1 showing a side section of the printing press, an ink fountain 12 is mounted between a pair of left and right frames 11 (in FIG. 1, only the frame 11 on the back side of the paper in the direction orthogonal to the paper is shown). A fountain roller 13 constituting the ink fountain 12 is rotatably supported at a predetermined position between the frames 11. Near the crucible roller 13, a bearing portion 16 formed integrally with the crucible base 14 is mounted on the support shaft 15 bridged between the frames 11 so as to be tiltable in the vertical direction. Side plates 17 (only the side plate 17 on the back side of the paper in the direction orthogonal to the paper surface is shown in FIG. 1) are fixed to the left and right sides of the crucible base 14 with bolts. An arcuate seal surface 17 a formed at the front end of the side plate 17 is in sliding contact with the outer peripheral surface 13 a of the crucible roller 13. A bottom plate 18 is fastened and fixed to the crucible base 14 by bolts (not shown) on the upper surface 14a of the crucible base 14. A thin metal plate 19 is fixed to the upper surface of the bottom plate 18 with bolts (not shown). A concave space formed by the upper surface of the thin metal plate 19, the outer peripheral surface 13 a of the pot roller 13, and the pair of side plates 17 is used as an ink reservoir T. A front end edge 19a of the thin metal plate 19 protrudes forward from a front end edge of the upper surface 14a of the pot base 14, and an ink delivery port 20 is formed between the outer peripheral surface 13a of the pot roller 13 and the front end edge 19a. ing.

  A gap G is formed at the front end portion of the pot base 14 so as to close the ink delivery port 20, and a blade 21 having rigidity for adjusting the amount of ink attached to the outer peripheral surface 13 a of the pot roller 13. It is installed. The blades 21 are mounted, for example, at 16 locations in a direction parallel to the axial direction of the crucible roller 13, and each blade 21 is configured to be able to adjust the gap G independently. The ink in the ink reservoir T is attached to the outer peripheral surface 13a of the bud roller 13 through the gap G and guided downward.

  Next, a mounting structure of each blade 21 to the crucible base 14 and a mechanism for adjusting a gap G between the blades 21 will be described. Since the mounting structure and adjusting mechanism of each blade 21 are all configured in the same manner, only one blade 21 will be described.

  On the front surface 14 b of the fountain base 14, a support protrusion 22 having a horizontal square column shape common to the blades 21 is formed integrally with the width of the ink fountain 12 (perpendicular to the paper surface of FIG. 1). A semi-cylindrical support shaft 22a is integrally formed on the front surface of the support protrusion 22 so as to be oriented in the width direction of the crucible base 14, and the support shaft 22a is formed on the back surface of the blade 21. The joint groove 21a is engaged, and the blade 21 is mounted so as to be reciprocally tiltable around the support shaft 22a (horizontal axis) around the support shaft 22a. The upper end surface 21 b of the blade 21 is slidably contacted with the lower surface of the front end edge 19 a of the thin metal plate 19.

  A stepped hole 21c penetrating in the front-rear direction is formed in an intermediate portion of the blade 21 in the vertical direction, and a bolt 23 is penetrated from the front toward the crucible base 14 through the stepped hole 21c. Is screwed into a screw hole formed in the front surface 14b of the pot base 14. A coiled compression spring 24 is interposed between the head 23a of the bolt 23 and the step 21d of the stepped hole 21c. The blade 21 is always urged clockwise around the support shaft 22a, that is, in the direction in which the gap G decreases. The bolt 23 and the compression spring 24 constitute a biasing mechanism that biases the blade 21 in the direction in which the gap G is reduced.

Next, a gap adjusting mechanism provided on the crucible base 14 for adjusting the gap G of the blade 21 will be described.
As shown in FIG. 2, the crucible base 14 is formed with a receiving hole 14d having a step 14c penetrating in the front-rear direction. A gap adjusting rod 25 is inserted into the front half of the housing hole 14d so as to be able to reciprocate in the front-rear direction. The tip of the gap adjusting rod 25 protrudes forward from the accommodation hole 14 d, and the cone-like tip 25 a can contact the back surface of the blade 21. A spring receiving collar 25b is formed at the rear end of the gap adjusting rod 25, and a coiled compression spring 26 is interposed between the collar 25b and the stepped portion 14c. The gap adjusting rod 25 is always urged away from the blade 21. A key groove 25c is formed on the outer peripheral surface near the tip of the gap adjusting rod 25, and a key 28 attached by a screw 27 is engaged with the front surface 14b of the crucible base 14, so that the gap adjusting rod 25 rotates in the accommodation hole 14d. It is not moved.

  A screw cylinder 29 having a female screw 29 a is inserted into the rear half of the accommodation hole 14 d, and a flange 29 b formed at the outer end thereof is fixed to the crucible base 14 with a bolt 30. A screw rod 31 is screwed into the female screw 29a of the screw cylinder 29, and a distal end portion of a small diameter rod portion 31a formed at the distal end portion thereof is an insertion hole formed at the rear end portion of the gap adjusting rod 25. 25d. A thrust bearing 32 is interposed on the outer periphery of the base end of the rod portion 31a so as to be positioned between the stepped portion 31b of the screw rod 31 and the rear end surface of the gap adjusting rod 25.

  A driven gear 33 is fitted and fixed to the rear end portion of the screw rod 31. A rotation mechanism for reciprocatingly rotating the driven gear 33 is mounted on the rear end portion of the crucible base 14. This rotation mechanism is supported at a predetermined position on the rear end surface of the crucible base 14 by a servo motor 34 capable of rotating forward and reverse, a drive gear 35 connected to the rotation shaft of the servo motor 34, and the drive gear 35 and And intermediate gears 36 respectively engaged with the driven gears 33.

Next, a gap setting means that is mounted on the pot 14 and sets the gap G of the blade 21 to a predetermined dimension set in advance will be described.
As shown in FIG. 1, the crucible base 14 is formed with a through hole 14e penetrating in the front-rear direction so as to be positioned below the accommodation hole 14d. A screw hole 14f is formed in series at the rear end of the through hole 14e. A gap setting rod 41 for setting the gap G of the blade 21 to a predetermined dimension is inserted into the through hole 14e. A male screw portion 41a formed at the rear end portion of the gap setting rod 41 is screwed into the screw hole 14f. On the rear end surface of the gap setting rod 41, as shown in FIG. 2, a hexagonal engagement hole 41b for engaging a hexagon wrench, for example, is formed. The blade 21 is prevented from rotating clockwise about the support ridge 22 in a state where the tip end surface 41c of the gap setting rod 41 is in contact with the lower end edge 21e of the blade 21. Is done. Thereby, the gap G of the blade 21 is set to a predetermined dimension determined by the position of the gap setting rod 41. The crucible 14 is screwed with a set bolt 42 for preventing the gap setting rod 41 from being screwed into a screw hole 14g provided corresponding to the screw hole 14f.

  As shown in FIG. 3, the blade 21 is formed with a mounting hole 21f penetrating in the front-rear direction so as to correspond to the tip 25a of the gap adjusting rod 25. An insulating ring 45 is inserted into the mounting hole 21f, and a cylindrical electrode terminal 46 made of a conductive material is inserted and fixed inside the insulating ring 45. As shown in FIG. 4, a screw 47 is screwed onto the front surface of the electrode terminal 46, and one end of the lead wire 48 is electrically connected by the screw 47. The other end of the lead wire 48 is connected to the crucible base 14 with a screw 50, and a DC power source 49 is connected to the lead wire 48. A current sensor 51 for measuring current is connected to the lead wire 48 connected to each blade 21. When the tip 25a of the gap adjusting rod 25 is separated from the electrode terminal 46, the current sensor 51 detects that the current has been cut off.

  In the first embodiment, the contact presence / absence detecting means for detecting whether or not the gap adjusting rod 25 is in contact with the blade 21 by the electrode terminal 46, the screw 47, the lead wire 48, the DC power source 49, the current sensor 51 and the like. Is configured.

  As shown in FIG. 4, the detection signal of the current sensor 51 is input to a controller 52 provided with a computer. An operation control signal is output from the controller 52 to the servo motor 34 of each blade 21.

  In the first embodiment, the current sensor 51, the controller 52, and the like constitute an operation stopping means for stopping the backward movement of the gap adjusting rod 25. Then, the blade 21 is moved in the direction of decreasing the gap G, and the blade 21 is stopped by the gap setting rod 41. At the same time, a current interruption is detected by the current sensor 51, and the controller 52 The servo motor 34 is stopped, and the backward movement of the gap adjusting rod 25 is stopped.

Next, the operation of the ink fountain 12 configured as described above will be described.
First, an operation of setting the origin position of the blade 21 by setting the gap G of the blade 21 to a certain size will be described.

  As shown in FIG. 2, the tip 25 a of the gap adjusting rod 25 is separated from the electrode terminal 46 on the back surface of each blade 21, and the lower end edge 21 e of each blade 21 contacts the tip surface 41 c of the gap setting rod 41. In this state, the gaps G between the blades 21 and the outer peripheral surface 13a of the pot roller 13 are set to 2 μm, for example. This setting operation is performed by the operator as follows. With the set bolt 42 loosened, a hexagon wrench is engaged with the engagement hole 41b of each gap setting rod 41, and each gap setting rod 41 is rotated to move the gap setting rod 41 forward or backward. Then, the blade 21 is tilted forward or backward. Then, a gauge having a thickness of 2 μ is interposed in the gap G, and the gap G is set to be 2 μ. After the setting is completed, the gap setting rod 41 is fastened and fixed to a predetermined position by the set bolt 42. This operation is performed in order to set the reference position of the blade 21 after the printing press is installed.

  Next, in accordance with a control signal from the controller 52, the servo motor 34 is rotated forward, the drive gear 35 is rotated, and the driven gear 33 and the screw rod 31 are rotated forward via the intermediate gear 36. Then, the screw rod 31 is screwed forward in the female screw 29a of the screw cylinder 29, and the gap adjusting rod 25 is advanced, and its tip 25a contacts the electrode terminal 46 on the back surface of the blade 21 as shown in FIG. Is done. When the gap adjusting rod 25 comes into contact with the electrode terminal 46, a current flows from the DC power source 49 via the lead wire 48 and the gap adjusting rod 25. Therefore, the current sensor 51 detects the current and the gap adjusting rod for the blade 21 is detected. 25 contact states are detected.

  In synchronization with the contact state detection operation, the servomotor 34 is further rotated forward by a predetermined pulse to advance the gap adjustment rod 25, and the blade 21 tilts in a direction to increase the gap G as shown in FIG. Then, when the gap G becomes 10 μm, for example, the forward rotation of the servo motor 34 is stopped.

  Thereafter, when the servo motor 34 is rotated in the reverse direction, the gap adjusting rod 25 is retracted, and the lower end edge 21e of the blade 21 contacts the tip surface 41c of the gap setting rod 41 (see FIG. 1), the blade 21 is compressed. Tilt by the spring 24 is stopped. Since the gap adjusting rod 25 is further retracted, the tip 25 a is separated from the electrode terminal 46. Then, the current from the DC power supply 49 is cut off, and the current sensor 51 detects that the gap adjusting rod 25 is separated from the back surface of the blade 21. Synchronously with this detection operation, the reverse rotation of the servo motor 34 is stopped, and the backward movement of the gap adjusting rod 25 is stopped. Thereafter, the servo motor 34 is rotated forward by a predetermined number of pulses, the gap adjusting rod 25 is advanced, the blade 21 is tilted again in the direction of increasing the gap G, and the gap G is set to a predetermined dimension of 5 μm, for example. Thus, the origin position of the blade 21 is set.

  For each blade 21, all the gaps G are initially set to a constant size, and the gaps G of the blades 21 are individually adjusted in advance according to the printing work conditions in a state where the origin positions of the blades 21 are set. The Thereafter, the ink is stored in the ink reservoir T, and a printing operation on the paper is performed.

Next, the effect of the ink fountain 12 of the printer configured as described above will be described.
(1) In the first embodiment, the gap setting rod 41 is provided in the crucible base 14 and when the blade 21 is tilted in a direction to reduce the gap G, the gap G is maintained at a constant dimension that does not become zero. I did it. For this reason, even if the blade 21 is tilted in the direction in which the gap G is reduced by the gap adjusting rod 25, the tip edge of the blade 21 does not contact the outer peripheral surface 13 a of the pot roller 13, and the pot roller 13. And damage to the blade 21 can be prevented. Further, it is possible to quickly and easily perform the operation for setting the blade 21 at the origin position while keeping the gap G constant.

  (2) In the first embodiment, since both the gap adjusting rod 25 and the gap setting rod 41 are mounted between one crucible 14 and each blade 21, the assembly accuracy thereof is improved. Even if the adjustment operation of the gap G is repeatedly performed, the adjustment accuracy can be maintained.

  (3) In the first embodiment, the gap adjustment rod 25 is retracted, the blade 21 is brought into contact with the tip end surface 41c of the gap setting rod 41, and the gap G is set to be constant. It was detected that the tip 25a of the adjustment rod 25 was separated from the electrode terminal 46 provided on the blade 21. For this reason, after the gap G is set to be constant by the gap setting rod 41, the gap adjustment rod 25 is moved forward by a predetermined distance, and the blade 21 is tilted to move from the tip surface 41c of the gap setting rod 41. In a state where the blade 21 is separated, the gap G can be set to a desired constant dimension, and the blade 21 can be easily set to a desired origin position.

Next, a second embodiment of the present invention will be described with reference to FIG.
A movable body 61 is housed in a housing recess 14h formed in the upper part of the crucible 14 so as to be capable of reciprocating linear movement in the front-rear direction. On the upper surface of the front end of the movable body 61, the rear end of the blade 62 is a bolt. It is fastened and fixed by 63. A bearing portion 61a is integrally formed at the rear end portion of the movable body 61, and a gap having the same function as the gap setting rod 41 is inserted into the insertion hole 61b formed through the bearing portion 61a in the front-rear direction. The setting rod 64 is penetrated. The crucible base 14 is formed with an insertion hole 14i for inserting the gap setting rod 64, and a screw hole 14j larger in diameter than the insertion hole 14i is formed behind the insertion hole 14i. The adjusting bolt 65 is screwed into the screw hole 14j. A male screw portion 64 a formed at the rear end portion of the gap setting rod 64 is screwed into the screw hole 65 a formed at the center portion of the adjustment bolt 65. A tool engagement groove 65b is formed in the rear end surface of the adjustment bolt 65, and the adjustment bolt 65 is rotated by, for example, a screwdriver or the like in a state where the set bolt 42 is loosened. The position can be adjusted.

  A support shaft 66 is attached to the crucible base 14 in parallel with the gap setting rod 64 at a predetermined position, and a cam 67 is attached to the front end portion of the support shaft 66 so as to be rotatable at the predetermined position. . A cam groove 67a is formed on the outer peripheral surface of the cam 67. On the other hand, an engagement recess 61c for engaging the sphere 68 at a predetermined position is formed on the bottom surface of the movable body 61. It is engaged with the groove 67a. A driven gear 67b is formed on the outer peripheral portion of the rear end of the cam 67, and the driven gear 67b is rotated by a rotation mechanism similar to the servo motor 34, the drive gear 35, and the intermediate gear 36. . The servo motor 34, the drive gear 35, the intermediate gear 36, the cam 67, the driven gear 67b, the sphere 68 and the like constitute a reciprocating mechanism for reciprocating the movable body 61.

  A mounting plate 69 is attached to the upper surface of the crucible base 14 by bolts 70, and a lower surface of the front end portion of the mounting plate 69 is covered with a magnetic body embedded and fixed on the upper surface of the bearing portion 61 a of the movable body 61. A position sensor 72 for detecting the position of the detection piece 71 is provided. The detection piece 71 and the position sensor 72 constitute detection means for detecting that the blade 62 is stopped at a predetermined position by the gap setting rod 64 and the gap G is set to be constant. In other words, contact presence / absence detecting means for detecting whether or not the position restricting portion 64b of the gap setting rod 64 is in contact with the bearing portion 61a of the movable body 61 is configured. Although not shown, a sensor may be provided in the bearing portion 61a to detect the presence or absence of contact between the position restricting portion 64b and the bearing portion 61a.

Next, a method for adjusting the origin position of the blade 62 of the ink fountain 12 configured as described above will be described.
First, in FIG. 7, in a state where the bearing 61a of the movable body 61 is separated rearward from the position restricting portion 64b of the gap setting rod 64, the servo motor 34 is rotated forward and the cam 67 is rotated forward. The spherical body 68 and the movable body 61 are moved forward by the action of the cam groove 67a. When the predetermined distance is moved, the bearing 61a of the movable body 61 comes into contact with the position restricting portion 64b of the gap setting rod 64, and the gap G between the tip edge of the blade 62 and the outer peripheral surface 13a of the urn roller 13 is formed. It is set to a constant (eg, 2μ) dimension. At this time, the detected piece 71 corresponds to the position sensor 72, and the state where the bearing portion 61a is in contact with the position restricting portion 64b of the gap setting rod 64 and the position is restricted is detected. Based on this detection signal, the forward rotation of the servo motor 34 is stopped, the servo motor 34 is immediately rotated backward by a predetermined number of pulses, and the sphere 68 and the movable body 61 are moved backward by a predetermined distance (for example, 3 μ). The gap G is set to a predetermined dimension (for example, 5 μm), and the blade 62 is set to the origin position.

Also in the ink fountain 12 of the second embodiment, the origin position of the blade 62 can be adjusted quickly and easily.
Next, an ink fountain 12 according to a third embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 10, in this embodiment, the lower portion of the blade 21 is divided into two forks to form a pair of left and right bearing portions 21g. In the two bearing portions 21g, an engagement groove 21h is formed in parallel with the engagement groove 21a so as to open downward. A pair of engagement pins 74 connected to both the left and right side surfaces of the screw cylinder 73 are engaged with both the engagement grooves 21h so as to be rotatable around a horizontal axis and to be relatively movable in the vertical direction. A screw hole 73 a is formed in the screw cylinder 73 in a direction perpendicular to the axis of the engagement pin 74. On the front surface of the screw cylinder 73, small-diameter screw holes 73b are formed at two locations. A plate-like position restricting member 75 that functions as an electrode terminal for restricting the position of a gap setting rod 86, which will be described later, passes through a bolt 76 from a hole 75a formed in the position restricting member 75 and passes through the screw hole 73b. The bolt 76 is attached to the screw cylinder 73 by screwing. A terminal fitting 78 connected to the lead wire 48 is connected to the position restricting member 75 by a bolt 76.

  On the other hand, as shown in FIG. 8, in the accommodation hole 14d formed in the crucible base 14, a bearing cylinder 29A is accommodated in place of the screw cylinder 29, and there is a gap in the bearing hole 29c of the bearing cylinder 29A. A clearance adjustment rod 81 constituting an adjustment mechanism is mounted by the motor 34 so as to be able to rotate forward and backward at a predetermined position. A male threaded portion 81 a provided at the outer periphery of the tip of the gap adjusting rod 81 is screwed into a threaded hole 73 a of the threaded cylinder 73. A male screw portion 81b is formed on the outer peripheral surface of the base end portion of the gap adjusting rod 81, and a mounting ring 82 is screwed to the male screw portion 81b. The driven gear 33 is fitted to the outer peripheral surface of the mounting ring 82, and the driven gear 33 is connected to the mounting ring 82 by a set bolt 83. A thrust bearing 84 is interposed between the bearing cylinder 29A and the mounting ring 82. A stepped portion 81c is formed on the outer peripheral surface of the intermediate portion of the gap adjusting rod 81, and the thrust bearing 32 and the collar 85 are interposed between the stepped portion 81c and the screw cylinder 29. It is biased by the compression spring 26.

  A through hole 81 d is formed in the axial direction at the center of the gap adjusting rod 81. A gap setting rod 86 having the same function as the gap setting rod 41 is passed through the through hole 81d. A tip 86 a of the gap setting rod 86 protrudes forward from the through hole 81 d of the gap adjusting rod 81 and corresponds to the position regulating member 75 attached to the screw cylinder 73 so as to be able to contact and separate. A male screw portion 86 b is formed on the outer peripheral surface of the base end portion of the gap setting rod 86, and is screwed into a screw hole 81 e formed in the base end portion of the through hole 81 d of the gap adjusting rod 81. A groove 86c for engaging a minus driver is formed at the base end of the gap setting rod 86. Then, by engaging a screwdriver with the groove 86c and rotating the gap setting rod 86, the protruding length of the tip 86a from the through hole 81d can be adjusted.

  In the third embodiment, although not shown, the tip 86a of the rod 86 is connected to the position regulating member by the lead wire 48, the DC power supply 49, the current sensor 51, the controller 52, the position regulating member 75, the gap setting rod 86, and the like. Contact presence / absence detecting means for detecting whether or not 75 is touched is configured.

Next, the operation of the ink fountain 12 configured as described above will be described.
In FIG. 11, a predetermined gap G (for example, 10 μ) is set between the outer peripheral surface 13 a of the roller 13 and the blade 21. The gap G is set by a worker in advance using a cage. Further, in FIG. 11, the male threaded portion 81a of the gap adjusting rod 81 is screwed into the screw hole 73a of the screw cylinder 73 by a predetermined amount, and the tip 86a of the gap setting rod 86 is spaced from the position regulating member 75 by a predetermined distance (for example, 20 μ). The current sensor 51 detects that the current is cut off by the current sensor 51, and the servo motor 34 is in a rotatable state.

  In this state, when the servo motor 34 is rotated forward by a control signal from the controller 52, the drive gear 35 is rotated, and the driven gear 33 and the gap adjusting rod 81 are rotated forward via the intermediate gear 36. The Then, the screw cylinder 73 shown in FIG. 11 is moved rearward by the male screw portion 81a of the gap adjusting rod 81 rotated at a predetermined position, and the blade 21 is rotated clockwise about the support shaft 22a of the support protrusion 22. As a result, the gap G decreases. When the gap G reaches a predetermined amount (for example, 5 μ), the tip 86a of the gap setting rod 86 is brought into contact with the position regulating member 75. (Refer to FIG. 8) Further specifically, with respect to the gap adjusting rod 81 such that the gap G becomes a predetermined amount (for example, 5 μ) in a state where the tip 86a of the gap setting rod 86 is in contact with the position regulating member 75. The position of the gap setting rod 86 in the axial direction is set in advance.

  With the gap setting rod 86 in contact with the position regulating member 75, current flows from the DC power source 49 via the lead wire 48, the position regulating member 75 and the gap setting rod 86, so the current sensor 51 detects the current, It is detected that the tip 86a of the gap adjusting rod 81 is in contact with the position regulating member 75 (blade 21). Based on this detection operation, the forward rotation of the servo motor 34 is stopped, and the origin position of the blade 21 with the gap G being a predetermined amount (5 μ) is set.

  In the third embodiment described above, since the male threaded portion 81a of the gap adjusting rod 81 is screwed into the threaded hole 73a of the threaded cylinder 73, the blade 21 can be forcibly reciprocated in the front-rear direction. It is possible to adjust the gap G properly at all times.

In addition, this invention is not limited to the said embodiment, It is also possible to actualize as follows.
In the first embodiment, the lower end edge 21e of the blade 21 is brought into contact with the tip surface 41c of the gap setting rod 41, the gap adjustment rod 25 is advanced, and the tip 25a is brought into contact with the back surface of the blade 21, and the current The state where the contact state is detected by the sensor 51 may be set as the origin position of the blade 21.

  In the first embodiment, the gap adjusting rod 25 shown in FIG. 6 is retracted, the blade 21 is stopped by the tip surface 41c of the gap setting rod 41, and the tip 25a of the gap adjusting rod 25 is moved from the back surface of the blade 21. A state in which the current sensor 51 detects the non-contact state of the tip 25 a may be set as the origin position of the blade 21.

  In the first embodiment, instead of the insulating ring 45 and the electrode terminal 46, a detection unit that detects that the lower end edge portion 21e of the blade 21 is in contact with the tip surface 41c of the gap setting rod 41 may be used. good.

  Although not shown, instead of the current sensor 51, a touch sensor such as a limit switch is provided at the tip 25 a of the gap adjustment rod 25, or a touch sensor is provided on the blade 21 corresponding to the gap adjustment rod 25. Or you may.

  The current sensor 51 is provided between the gap setting rod 41 and the blade 21, a touch sensor such as a limit switch is provided on the tip surface 41 c of the gap setting rod 41, or the gap setting rod 41 is provided on the blade 21. Correspondingly, a touch sensor may be provided.

  In this other embodiment, when the blade 21 is rotated in the direction of decreasing the gap G and the blade 21 is brought into contact with the gap setting rod 41, the servo motor 34 is stopped to drive the gap 21. The operation of the adjustment rod 25 is stopped.

  Although not shown, in the second embodiment, instead of the detected piece 71 and the position sensor 72, the bearing portion 61a of the movable body 61 abuts on the position restricting portion 64b of the gap setting rod 64, and the An increase in the rotational torque of the servo motor 34 is detected by a torque sensor, and based on a detection signal from the torque sensor, the servo motor 34 stops rotating forward and the servo motor 34 rotates backward by a predetermined number of pulses. The origin position of the blade 62 may be set.

  In the second embodiment, the position sensor 72 detects that the bearing portion 61a of the movable body 61 is in contact with the position restricting portion 64b of the gap setting rod 64, or the bearing portion 61a is the position restricting portion 64b. A state where it is detected that the blade 62 is separated may be set as the origin position of the blade 62.

  In the third embodiment, it is detected that the gap adjusting rod 81 has come into contact with the position regulating member 75 (blade 21), and the forward rotation of the servo motor 34 is stopped. The origin position may be set. That is, after the forward rotation of the servo motor 34 is stopped, the servo motor 34 is reversely rotated by a predetermined number of pulses, the gap adjusting rod 81 is reversely rotated, and the screw cylinder 73 is moved forward. Then, the blade 21 is rotated counterclockwise, the blade 21 is tilted in the direction of increasing the gap G, the gap G is set to a predetermined dimension (for example, 5 μ), and the origin position of the blade 21 is It may be set.

  -Although not shown in figure, in the said 1st Embodiment, you may make it perform the reciprocating motion of the said gap | interval adjustment rod 25 in the front-back direction with a manual operation mechanism. Similarly, in the second embodiment, the reciprocating movement of the movable body 61 in the front-rear direction may be performed by a manual operation mechanism. Furthermore, in the third embodiment, the clearance adjustment rod 81 may be reciprocated by a manual operation mechanism.

  In place of the servo motor 34, a pulse motor, a stepping motor or the like may be used.

1 is a cross-sectional view of an ink fountain showing a first embodiment embodying the present invention. The expanded sectional view which shows the principal part of an ink fountain. The separation perspective view showing a braid, a bolt, a gap adjustment rod, and a gap setting rod. Explanatory drawing which shows a crucible stand, a braid | blade, a clearance adjustment rod, an electrode terminal, and a lead wire. The cross-sectional view of the ink fountain for demonstrating the adjustment operation | work of the origin position of a braid | blade. The cross-sectional view of the ink fountain for demonstrating the adjustment operation | work of the origin position of a braid | blade. The cross section of the ink fountain which shows 2nd Embodiment which actualized this invention. The cross section of the ink fountain which shows 3rd Embodiment which actualized this invention. The front view of the braid | blade of 3rd Embodiment. The disassembled perspective view of the principal part of the ink fountain of 3rd Embodiment. Operation | movement explanatory drawing of the ink fountain of 3rd Embodiment.

Explanation of symbols

  G ... Gap, 13 ... Roller, 13a ... Outer peripheral surface, 14 ... Crucible base, 14a ... Upper surface, 14b ... Front surface, 14e ... Through hole, 14j, 65a, 73a, 81e ... Screw hole, 18 ... Bottom plate, 19a ... Front edge 21, 62 ... blade, 25, 81 ... gap adjusting rod, 25 a, 86 a ... tip, 73 ... screw cylinder, 34 ... motor, 41, 64, 86 ... gap setting rod, 41 a, 64 a, 81 a, 86 b ... male screw 61, movable body, 75 ... position regulating member

Claims (10)

A vase and a vat roller are attached to the frame, an ink reservoir is formed between the bottom plate attached to the upper surface of the vat and the outer peripheral surface of the vat roller, and the outer peripheral surface of the vat roller and the bottom plate are A plurality of blades for adjusting the ink supply amount corresponding to the ink supply port formed between the front edge and the blade are mounted, and the blades are moved back and forth between the pot base and the blades to move the blade rollers. A clearance adjustment mechanism for adjusting a clearance formed by the outer peripheral surface and the leading edge of the blade is mounted, and the blade reduces the clearance by the clearance adjustment mechanism between the crucible base and the blade. An ink fountain device in a printing press, comprising a gap setting means for stopping a blade before the gap becomes zero and setting the gap to a certain size in a stroke to be moved. 2. The operation stop unit according to claim 1, wherein the blade is moved in a direction to reduce the gap, and the blade is stopped by the gap setting unit, and at the same time, an operation stop unit is provided to stop the operation of the gap adjustment mechanism. An ink fountain device in a printing press. 3. The blade according to claim 1, wherein a blade is mounted on the front surface of the crucible such that the blade can reciprocate around a horizontal axis, and the gap is always provided between the front surface of the crucible and the blade. An urging mechanism for urging in a decreasing direction is provided, and a gap setting rod constituting the gap setting means is attached to the crucible so as to be in contact with the blade, and the gap adjusting mechanism is provided on the crucible. In a process in which the gap adjusting rod is configured to be able to reciprocate in the front-rear direction in contact with the blade, and the gap adjusting rod is retracted to reduce the gap, the blade is attached to the tip of the gap setting rod. An ink fountain device in a printing press, wherein the ink fountain device is configured to be contacted. The gap adjusting rod according to claim 3, wherein the gap adjusting rod is configured to be reciprocated on the same straight line by a rotational motion of a motor capable of rotating forward and backward, and between the tip of the gap adjusting rod and the blade, A contact presence / absence detecting means for detecting presence / absence of contact between both members is provided, and the operation of the motor is permitted while the gap adjusting rod is in contact with the blade, and the movement of the blade is stopped by the gap setting rod. When the non-contact state is detected when the tip of the gap adjusting rod is separated from the blade by the contact presence / absence detecting means, the rotation of the motor is stopped, and the position of the blade in this state is used as a reference. An ink fountain device in a printing machine, wherein the origin position of the blade is set. 5. The forward rotation of the motor according to claim 4, wherein when the contact presence / absence detecting means detects the non-contact state when the tip of the gap adjusting rod is separated from the blade, the motor is stopped by a predetermined number of pulses. An ink fountain device in a printing press, wherein the ink fountain device is configured such that the blade is rotated by a predetermined angle and tilted by a predetermined angle in a direction in which the gap is increased to set the origin position of the blade. In Claim 1 or 2, a movable body is attached to the upper surface of the crucible so as to be capable of reciprocating linear movement in the front-rear direction, a blade is connected to the front end of the movable body, and the crucible, the movable body, A reciprocating mechanism having a motor capable of rotating in the forward and reverse directions for reciprocating the movable body is provided between the crucible and the movable body. A clearance setting means for stopping the movable body and the blade and setting the clearance to be constant is provided in a process of moving in a decreasing direction, and the blade is stopped at a predetermined position by the clearance setting means on the crucible base. When the blade is stopped at a predetermined position by the detection means, the operation of the reciprocating mechanism is stopped, and the blade is in reference to the position of the blade in this state. An ink fountain device in printing machines, wherein the origin position is configured to be set. 7. The operation of the reciprocating mechanism according to claim 6, wherein the motor is rotated backward by a predetermined number of pulses, and the blade is moved by a predetermined distance in the direction of increasing the gap, so that the origin of the blade An ink fountain device in a printing press, characterized in that the position is set. 3. The blade according to claim 1, wherein a blade is mounted on the front surface of the crucible such that the blade can reciprocate around a horizontal axis, and the gap is always provided between the front surface of the crucible and the blade. An urging mechanism for urging in a decreasing direction is provided, and a screw cylinder is attached to a lower end portion of the blade so as to be able to reciprocate around a horizontal axis parallel to the horizontal axis. A gap adjusting rod constituting the gap adjusting mechanism is mounted so as to be able to rotate forward and backward at a predetermined position, and a male thread portion provided on the outer periphery of the tip of the gap adjusting rod is screwed into a screw hole of the screw cylinder, The clearance adjustment rod is provided with clearance setting means for stopping the screw cylinder and the blade at a predetermined position and setting the clearance constant in a process of reducing the clearance by rotating the adjustment rod. For setting means An ink fountain device in printing machines, characterized in that the home position of the blade is configured to be set with reference to a gap that has been set me. The gap adjusting rod according to claim 8, wherein the gap adjusting rod is configured to be rotated by a motor capable of rotating in the forward and reverse directions, and a through hole is formed in an axial direction at a central portion of the gap adjusting rod. A gap setting rod constituting the gap setting means is penetrated so that the position of the gap setting rod can be adjusted in the front-rear direction, and the tip of the gap setting rod is opposed to a position regulating member provided at the end of the screw hole of the screw cylinder. And a contact presence / absence detecting means for detecting whether or not a tip of the rod is in contact with the position regulating member is provided between the gap setting rod and the position regulating member, and the gap adjusting rod is rotated. In the process of reducing the gap, when it is detected that the tip of the gap setting rod contacts the position regulating member, the rotation of the gap adjustment rod is stopped, and the position of the blade in this state As a reference, an ink fountain device in printing machines, wherein a home position of the blade is configured to be set. 10. The rotation of the gap adjusting rod according to claim 9, after which the motor is reversely rotated by a predetermined number of pulses, and the blade is moved by a predetermined distance in the direction of increasing the gap. An ink fountain device in a printing press, characterized in that the position is set.

Images