JP2835818B2 - Ink fountain blade adjustment device for printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink fountain blade adjusting device for a printing press which adjusts a gap between a fountain roller and a blade of the printing press.

[0002]

2. Description of the Related Art Conventionally, generally, in an offset printing machine or the like, as shown in FIG. 4, an ink fountain 41 and a fountain roller 42 are arranged above and below a printing paper P. . The plate cylinders 44 are connected to the respective pot rollers 42 via a plurality of ink mixing rollers 43, and the paper P is supplied between the rubber cylinders 45 provided for each plate cylinder 44.

[0003] Below the ink fountain 41, a fountain roller 42 is provided.
Are provided with a plurality of split blades (not shown) forming an adjustable minute gap for allowing ink in the ink fountain 41 to pass therethrough. Then, with the rotation of the fountain roller 42, the ink in the ink reservoir formed by the ink fountain 41 and the fountain roller 42 is sent out from the gap formed between the fountain roller 42 and each of the divided blades. An ink film having an appropriate thickness is formed on the surface of the urn roller 42 by the ink sent from the gap. The ink film is kneaded in the process of being sequentially transferred to the ink kneading roller 43 and then supplied to the printing plate of the plate cylinder 44. Then, the image is transferred to the paper P from the printing plate via the blanket surface of the blanket cylinder 45. As a result, an image of the plate surface of the plate cylinder 44 is printed on the paper P.

[0004] At this time, printing is performed with the width set for the paper P. However, since the ink transfer area, that is, the image area at each position of the width is usually different, the amount of ink required at each position is different. ing. That is, the urn roller 42
If the gap between the roller and each divided blade is the same at each position in the width direction of the urn roller 42, the amount of ink supplied at each position is substantially the same. As a result, the printed paper P has dark and light portions. Therefore, in order to eliminate the shading, it is necessary to optimally adjust the ink supply amount at each position in the width direction of the urn roller 42 according to the required amount.

The dividing blade is formed in a block shape divided into widths of, for example, 35,50.5 mm in the width direction of the urn roller 42 in order to adjust the ink supply amount at each position. Then, the divided blades are arranged without gaps along the pot roller 42 like a piano keyboard,
Each of the divided blades can independently adjust the gap with the urn roller 42. By adjusting the gap between each divided blade and the urn roller 42 according to the required amount of ink at that position, an appropriate amount of ink can be supplied at each position in the width direction of the paper P.

[0006] Position adjustment of each divided blade is performed by a divided blade adjusting device provided independently for each divided blade. Each split blade adjusting device basically includes a drive unit having a drive motor for advancing each split blade toward the urn roller 42 and a coil spring for retracting the split blade, and is formed to have a size that fits within the width of the split blade. Have been.

As an apparatus for adjusting the dividing blade of such an ink fountain, for example, an apparatus as shown in FIG. 5 is used. In this blade adjusting device, a rack 52 is arranged in parallel with the divided blade 51, and a male screw 7 shaft 54 is screwed into a female screw portion 53 provided on the rack 52. When the male screw shaft 54 is driven to rotate by the drive motor 55, the rack 52 moves back and forth in the length direction.

The base end of the split blade 51 is in contact with a plate cam 58 which is supported on a plate cam support 56 by an eccentric shaft 57 so as to be angularly displaceable. The split blade 51 is pressed against the plate cam 58 by a compression coil spring (not shown). A lever 59 extends in the radial direction from the plate cam 58, and a segment gear 60 having an eccentric shaft 57 formed at the end thereof is engaged with the rack 52. When the rack 52 moves back and forth, the plate cam 58 is angularly displaced via the lever 59. As a result,
The dividing blade 51 is moved forward or backward with respect to the urn roller 61, and the size of the gap is changed.

A male screw shaft 63 fixed to a base (not shown) by a nut 62 is screwed into the base end of the plate cam support portion 56. When the male screw shaft 63 is rotated, the plate cam 5 is rotated.
8 moves forward or backward with respect to the split blade 51. Then, at the start of use, the pot roller 6 of each split blade 51
In order to accurately set the position with respect to 1, each divided blade 51 is brought into contact with the urn roller 61, and this position is set as an initial position, and each divided blade 51 is moved by the drive motor 55. In order to adjust the initial position of each divided blade 51, the tip of the divided blade 51 is adjusted by loosening the nut 62, moving the male screw shaft 63 in the axial direction, and moving the plate cam 58 toward the urn roller 61. It is brought into contact with the roller 61.

Further, Japanese Utility Model Publication No. 4-15493 discloses an ink fountain blade adjusting device as shown in FIG. This blade adjusting device is equipped with a pot roller 7
A slide plate 73 is arranged below the divided blade 72 that is brought into contact with 1 and is connected by bolts 74. A drive motor 75 is provided at the base end of the slide plate 73.
The slide cam 73 is pressed against the plate cam 76 by the compression coil spring 77. Then, when the plate cam 76 is rotated, the split blade 72 moves forward or backward with respect to the urn roller 71 together with the sprite plate 73.

In order to adjust the initial position of each split blade 72, each slide plate 73 is
The blade is moved forward to one side, and is arranged at a position where the tip of the split blade 72 is close to the urn roller 71. When the bolts 74 are loosened in this state, each of the divided blades 72 is moved toward the pot roller 71 by a compression coil spring 78 provided for the slide plate 73, and the tip is moved to the pot roller 71.
Is contacted. In this state, when the bolts 74 are tightened and the divided blades 72 are fixed to the slide plate 73, the initial positions of the divided blades 72 are adjusted.

In the ink amount adjusting apparatus using such divided blades 51, 72, each divided blade 51, 72 is used.
The ink penetrates into the gap between the 72. As a result, the force required to move the split blades 51 and 72 increases,
In some cases, the split blades 51 and 72 may not be sufficiently returned by the force of the compression coil spring 77. As a result, the divided blades 51 and 72 are no longer arranged at positions corresponding to the rotational positions of the drive motors 55 and 75, so that the urn roller 6
In some cases, the adjustment of the gap with 3, 71 could not be performed normally.

Therefore, the spring constant of the compression coil spring 77 is set as large as possible in order to reliably retreat the split blades 51 and 72. On the other hand, if the spring constant of the compression coil spring is set high, the split blades 51, 72
Must be increased against the urn rollers 63 and 71 against the force of the compression coil spring. For this purpose, it is necessary to use drive motors 55 and 75 having a large drive torque or to increase the reduction ratio.

[0014]

However, in the former ink fountain blade adjusting mechanism, the drive motor 55 is not used.
In order to convert the rotational movement of the rack 52 into a linear movement having a small stroke, the female screw 53 and the female screw 5
3 is used. Since a large force is applied between the two screws via the lever 59 from the compression coil spring, a large frictional force is generated by the rotation of the screws. As a result, the drive torque of the drive motor 55 must be further increased by an amount corresponding to the frictional force. Therefore, it is necessary to use a drive motor 55 having a larger drive torque or a reduction mechanism having a larger reduction ratio. was there.

However, since the width of each of the split plates 51 is limited, there is a limitation on using a large drive motor 55 and increasing the size of the speed reduction mechanism. or,
In the latter ink fountain blade adjusting device, the rotary motion is converted to linear motion by the plate cam 76. Therefore, since the loss due to the frictional force is relatively small without transmitting the movement by the screw, the drive torque of the drive motor 75 needs to be increased in opposition to the frictional force, and a reduction mechanism having a large reduction gear ratio needs to be used. There is no.

However, since it is difficult to move and adjust the plate cam 76 in a direction perpendicular to the rotation axis, the initial position of each divided blade 72 is not adjusted by moving the plate cam 76. That is, a slide plate 73 is provided opposite to each of the divided blades 72, and the divided blade 72 is disposed on the slide plate 73 so as to be movable and fixed to the pot roller 71 side with bolts 74, so that each divided blade 72 The initial position is adjusted. As a result, the mechanism for adjusting the initial position is complicated, and the number of components is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a mechanism capable of reducing loss due to friction of torque of a driving motor for moving a divided blade. It is another object of the present invention to provide an ink fountain blade adjusting device for a printing press, which can adjust the initial position of the divided blade with a simple mechanism.

Another object of the present invention is to reduce the size of an ink fountain blade adjusting device in a printing press by employing the above mechanism. It is another object of the present invention to clarify the adjustment operation limit of the above mechanism and to ensure that operation stops at the operation limit. The intention of some other characteristic configurations will be clarified in the following description.

[0019]

In order to solve the above problems, the present invention provides an ink fountain for storing ink, a fountain for supporting the ink fountain, and an ink fountain adjacent to the ink fountain.
A fountain roller for feeding ink in a film form, and a plurality of gaps provided in the axial direction of the fountain roller to advance or retreat with respect to the fountain roller, and to send ink between the tip thereof and the outer peripheral surface of the fountain roller And a push rod for contacting the base end of the dividing blade and advancing or retracting the corresponding dividing blade with respect to the fountain roller, respectively. ,

The split blades are provided corresponding to the respective split blades, are rotatably arranged around the axis of the support shaft parallel to the moving direction of the split blades, and are displaced around the axis in the direction parallel to the moving direction of the split blades. A front cam having a cam surface, the base end of the push rod being in contact with the cam surface, and a driving means for rotating the front cam are provided.

In particular, the invention according to claim 1 is provided with a restricting means for restricting excessive rotation of the front cam in addition to the above configuration. According to a second aspect of the present invention, in addition to the above structure, a position adjustment for adjusting the position of the front cam in the axial direction by moving the support shaft of the front cam in parallel with the axis. Means.

According to a third aspect of the present invention, in addition to the above configuration, a position adjusting means for adjusting the position of the front cam in the axial direction by moving the support shaft of the front cam in parallel with the axis, and Regulating means for regulating excessive rotation of the cam. Further, according to the present invention, the driving hand
A spur gear portion whose step is formed around the support shaft of the front cam, and a spur gear whose rotation axis is arranged in parallel with the support shaft of the front cam and meshes with the spur gear portion in the axial movement range of the front cam. And a drive unit for rotating the spur gear.

According to a fifth aspect of the present invention, the first stopper is provided on the front cam and moves along a predetermined trajectory according to the displacement of the front cam, and the trajectory of the first stopper is at least partially included in the first stopper. And a second stopper which is provided on a pot base or a push rod on the fixed side so as to be able to contact the first stopper which moves. Contract
The invention according to claim 6 is characterized in that the position adjusting means comprises: a male screw portion provided on the end of the support shaft of the front cam opposite to the pot roller side; and a female screw hole provided on the pot base and into which the male screw portion is screwed. And a nut for fixing the male screw portion to the female screw hole. Further, the invention according to claim 7 is configured such that a spring is provided between the dividing blade and the urn base to apply a force acting on the dividing blade toward the base end of the dividing blade.

According to an eighth aspect of the present invention, the lower surface of the split blade is slightly longer than the upper surface, and the base end of the split blade which is in contact with the push rod is formed in a tapered shape. Claim 9
In the invention described in (1), the tip of the push rod is formed in a substantially hemispherical shape, and the contact of the push rod with the divided blade is configured as the contact between a spherical surface and a plane. Claim 10
The height of the cam surface of the front cam is proportional to the angle change position of the front cam.
According to an eleventh aspect of the present invention, the cam surface of the front cam is formed in an annular shape with respect to the rotation axis of the front cam, and the cam surface has the highest position and the lowest position. Are formed adjacent to each other.

Therefore, the operation of the present invention is as follows. When the driving means rotates the front cam, the front cam moves and arranges the push rod in the front-rear direction. As a result, the dividing blade moves forward or backward with respect to the urn roller. That is, since the conversion of the rotary motion into the linear motion is performed without using the screw mechanism, a large frictional force does not occur. In particular, claim 1
According to the invention described in (1), in addition to the above operation , the restricting means reliably stops the rotation of the front cam driven by the driving means. As a result, the front cam does not rotate excessively.

According to the second aspect of the present invention, the above operation
In addition, when the support shaft of the front cam is moved in the axial direction, the position of the front cam is changed. As a result, the position of the dividing blade with respect to the urn roller is adjusted. Therefore,
Adjustment of the initial position of the split blade is realized by a simple mechanism.

According to the third aspect of the present invention, the above operation
In addition, when the support shaft of the front cam is moved in the axial direction, the position of the front cam is changed. As a result, the position of the divided blade relative to the pot roller is adjusted. Therefore, the initial position of the split blade can be adjusted with a simple mechanism.
Is done . Further, the regulating means reliably stops the rotation of the front cam which is rotationally driven by the driving means. As a result, the front cam does not rotate excessively.

According to the fourth aspect of the present invention, in the operation according to any one of the first to third aspects, even if the front cam is moved in the axial direction, the rotation axis of the front cam is maintained at the center. Are engaged with each other. As a result, even if the front cam is moved in the axial direction for adjusting the initial position of the divided blade, the front cam is driven to rotate by the drive unit. According to the fifth aspect of the present invention, in the operation of the first or third aspect , the second stopper fixed to be located on the movement locus of the first stopper that moves with the displacement of the front cam. And its movement is regulated. As a result, the front cam is reliably stopped at the desired rotation phase.

According to the invention described in claim 6 , the claim
In the operation according to the second or third aspect of the present invention, the front cam is screwed into a female screw hole provided on the end of the support shaft of the support shaft opposite to the urn roller, and fixed with a nut. And the position in the axial direction is adjusted by loosening the nut. As a result, the position of the front cam is moved by adjusting the nut and the external thread at a position away from the urn roller.

According to the seventh aspect of the invention, in the operation according to any one of the first to sixth aspects, a force is applied to the divided blade toward the base end of the divided blade by a spring. As a result, as the push rod retreats, the split blade surely moves to the proximal end side. According to an eighth aspect of the present invention, in the operation according to any one of the first to seventh aspects, a force directed to a lower surface is applied to the divided blade by contact between the divided blade and the push rod. . As a result, the divided blade surely contacts the pot base and the contact is maintained.

According to the ninth aspect of the present invention, in the operation according to any one of the first to eighth aspects, the contact between the split blade and the push rod is substantially point contact. As a result, the influence of the manufacturing accuracy of the divided blade and / or the push rod or any one of the mutual contact portions is extremely small, and the blade adjustment is accurate. Claim
According to the tenth aspect , the first to ninth aspects are described.
In the operation according to any one of the inventions, the forward and backward movements of the split blade can be made proportional to the amount of angular displacement of the front cam. As a result, the amount of advance and retreat of the divided blade can be easily obtained, and the control of the adjustment of the divided blade is easy.

According to the eleventh aspect of the present invention, in the operation according to any one of the first to tenth aspects, the entire front cam is formed to have a single slope, and the push rod is formed by the entire length of the slope. Can be moved forward and backward. As a result, the inclination of the front cam can be reduced, the force for advancing the push rod can be reduced, and the force for rotating the front cam generated by the force of the push rod pushing the front cam can be reduced.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An ink fountain blade adjusting device in a printing press according to one embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, an ink fountain 2 for storing ink, a fountain roller 3 for sending out ink from the fountain 2, and a fountain base 4 are mounted between frames 1 arranged on both sides of the printing width. Have been.

As shown in FIG. 1, the ink fountain 2 is formed by a bottom plate 5 arranged diagonally and side plates 6 arranged on both sides in the width direction. The urn roller 3 is rotatably supported by bearings (not shown) provided on the left and right frames 1 respectively. The fountain roller 3 is disposed at a position close to the end of the bottom plate 5, and the ink fountain 2 and the fountain roller 3
This forms an ink reservoir. The pot base 4 has both ends attached to the left and right frames 1 and is disposed below the bottom plate 5. On the upper side of the urn table 4 on the urn roller 3 side, long block-shaped divided blades 7 are arranged adjacent to each other with no gap as shown in FIG.

Each of the divided blades 7 has a long slot 8 formed in the longitudinal direction at the tip end thereof in two stages.
A screw 9 arranged in the elongated hole 8 is mounted on the pot base 4 so as to be movable in the length direction thereof. A space portion 10 is formed at the base end side of each divided blade 7, and an upper portion of an L-shaped receiving metal fitting 11 to be mounted in the groove 4 a of the pot stand 4 is arranged at a distal end side within each space portion 10. ing. A support shaft 12 extending in the length direction of the divided blade 7 is provided on a surface of the receiving member 11 facing the base end side of the divided blade 7. A disk-shaped spring receiver 12 is provided between the support shafts 12.
a is formed.

A compression coil spring 13 is mounted on the support shaft 12, one end of which is in contact with a spring receiver 12a.
The other end of the compression coil spring 13 is in contact with a disk-shaped spring receiver 14 a formed at the center of the spring bearing shaft 14. The distal end side of the spring bearing shaft 14 is formed in a conical shape, and the distal end is disposed in a support hole 4 b provided on the inner wall on the proximal end side of the divided blade 7 surrounding the space 10. The compression coil spring 13 applies a force toward the base end of the split blade 7. The base end face 7a of the split blade 7 is formed in a tapered shape.

A through hole 4c is formed at the base end side of the dividing blade 7 of the pot base 4 in the longitudinal direction of the dividing blade 7, and a cylindrical push rod 15 is formed in the through hole 4c in the axial direction. Mounted movably. The push rod 15 has a long groove 15a extending in the length direction formed on an upper side thereof, and a screw 1 screwed into the pot base 4 is formed in the long groove 15a.
6 is inserted, and rotation about its axis is regulated. Tip surface 15b of push rod 15
Is formed in a substantially spherical shape and is in contact with the tapered base end face 7a of the split blade 7. A cam roller 18 is rotatably supported at a base end of the push rod 15 by a shaft 17 arranged in a radial direction.

Each split blade 7 is pressed against the tip of the push rod 15 by applying a force by a compression coil spring 13. At this time, since the base end surface of the split blade 7 is formed in a tapered shape, the split blade 7
Is prevented from rising. Also, push rod 15
A second stopper pin 19 extending in the axial direction
Is provided. On the base end side of the urn base 4 with respect to the push rod 15, a housing portion 4d is formed. In the housing portion 4d, a support shaft 20 is provided rotatably with its axis parallel to the dividing blade 7.

The support shaft 20 has a male screw portion 21 at its proximal end.
The screw 23 is screwed into the female screw hole 22 formed in the pot base 4 by the male screw portion 21, and is fixed by a nut 23 so as to be unable to move and rotate in the axial direction. A groove 2 for using a driver or the like is formed on the base end surface of the support shaft 20.
0a is provided so that the support shaft 20 can be rotated by a driver or the like. A disk-shaped support plate 24 is formed at the center of the support shaft 20, and a front cam 26 is provided on the urn roller 3 side of the support plate 24 via a thrust bearing 25, and the shaft is provided via a radial bearing (not shown). It is arranged rotatably with respect to 20 .

As shown in FIG. 3A , the front cam 26 has a cam portion 27 formed on the outer peripheral portion on the side surface on the pot roller 3 side. The cam portion 27 is formed so that the surface on the pot roller 3 side is displaced in the longitudinal direction of the axis.
7a, and the cam roller 18 of the push rod 15 is brought into contact with the cam surface 27a.
The cam surface 27a is formed so that its height position is proportional to the rotation angle of the front cam 26.

Further, a spur gear portion 28 forming a spur gear is formed on the outer periphery of the front cam 26. A first stopper pin 29 extending in the axial direction is provided inside the cam portion 27 of the front cam 26. This first stopper pin 29
As shown in FIG. 3B, when the cam roller 18 is arranged at the highest position on the cam surface 27a, the cam roller 18 comes into contact with the second stopper pin 19 of the push rod 15 and
6 is further restricted.

A rotating shaft 30 is disposed in parallel with the support shaft 20 in the housing portion 4d so as to be rotatable. The rotating shaft 30 is provided with a small gear 31 that meshes with the spur gear portion 28 of the front cam 26 on the distal end side, and a large gear 32 on the proximal end side. A stepping motor 33 is provided adjacent to the rotating shaft 30 with the rotating shaft 34 parallel. The stepping motor 33 has a drive gear 35 attached to a rotating shaft 34, and the drive gear 35 is meshed with the large gear 32. A driving section is constituted by the large gear 32, the stepping motor 33 and the driving gear 35.

A drive circuit (not shown) is connected to each stepping motor 33. Each drive circuit is connected to a control panel (not shown). The control panel displays the rotational position of each stepping motor 33 with the number of steps. Further, the control panel is provided with a reset button, and when this reset button is pressed, the respective step numbers are all reset to zero.

Next, the operation of the ink fountain blade adjusting device configured as described above will be described. In order to adjust the initial position of each divided blade 7, the respective stepping motors 33 are driven to rotate, and the first stopper pins 29 of the front cam 26 contact the second stopper pins 19 of the push rod 15 to restrict the rotation. The front cam 26 is rotated to the position to be performed. In this state, the push rod 15
Is disposed at the highest position of the cam surface 27a. As a result, each divided blade 7 is arranged at a position most advanced to the pot roller 3 side.

In this state, the nuts 23 screwed into the respective male screw portions 21 are loosened, a screwdriver or the like is inserted into the groove 20a, and the support shaft 20 is rotated to advance in the axial direction. It is brought into contact with the roller 3. Then, in this state, the nut 23 is tightened to fix the position of the support shaft 20. As a result, the initial position of each divided blade 7 is set. In this state, the reset button on the control panel is pressed, and the display of each step number is set to zero.

Next, according to the required amount of ink at each position in the width direction of the printing plate, each stepping motor 33 is rotated in a direction in which the divided blade 7 is retracted from the urn roller 3. The rotation of each stepping motor 33 is
Drive gear 35, large gear 32, small gear 31, and front cam 2
6, the front cam 26 is rotated. At this time, since the height position of the cam surface 27a is proportional to the rotation angle of the front cam 26, the number of steps and the size of the gap are proportional.

As a result, the position of the push rod 15 in contact with the cam roller 13 is
The lower part of a is arranged. And push rod 1
5 and the split blade 7 are pushed toward the front cam 26 by the compression coil spring 13, so that the tip of the split blade 7 is moved and arranged in a direction of retreating from a position where it contacts the urn roller 3. Therefore, a gap is formed between the tip of each divided blade 7 and the urn roller 3 for sending out ink. At this time, since the push rod 15 is brought into contact with the cam surface 27a via the cam roller 18, the push rod 15 can move on the cam surface 27a smoothly without generating sliding friction.

The size of the gap between each divided blade 7 and the pot roller 3 is displayed as the number of steps of each stepping motor 33. When the fountain roller 3 is driven to rotate in a state where a gap is formed between the dividing blade 7 and the fountain roller 3, the ink in the ink fountain 2 is sent out in a film form from the gaps facing the respective dividing blades 7. . By adjusting each divided blade 7 based on the number of displayed steps in accordance with the required amount of ink at each position in the width direction of the printing plate, the optimum amount of ink is supplied to each position in the width direction. Is done. As a result, the ink density on the printed paper surface is averaged.

As described above, according to the above-described ink fountain blade adjusting device, the support shaft 20 of the front cam 26, which is rotationally driven by the stepping motor 33, is disposed parallel to the moving direction of the split blade 7, and The cam surface 27a which is displaced in the direction shown in FIG.
With respect to the urn roller 3. As a result, since the conversion from the rotary motion to the linear motion is performed without depending on the combination of the male screw and the female screw, the loss of the driving torque of the stepping motor 33 due to the frictional force is reduced. Therefore, it is not necessary to use a large motor having a large torque for the stepping motor 33, and it is not necessary to provide a large number of gears to increase the reduction ratio.

Further, since the loss of the driving torque of the stepping motor 33 is reduced, the force for moving the divided blade 7 forward can be set large. As a result, the spring constant of the compression coil spring 13 for retracting the split blade 7 can be set high. Therefore, the split blade 7
Forward and backward are reliably performed with a strong force, so that the ink enters the gap between the divided blades 7 so that the divided blade 7 becomes difficult to return, and the position of the divided blade 7 matches the number of steps of the stepping motor 33. The situation of disappearance is unlikely to occur.

The support shaft 20 on the side opposite to the pot roller 3 side
A male screw 21 is provided at the end, and the front cam 26 is attached to the pot base 4 by the male screw 21 so as to be movable and adjustable in the axial direction. As a result, the adjustment of the initial position of each divided blade 7 can be performed by a simple mechanism, and the adjustment can be performed at a position away from the urn roller 3, so that the work can be easily performed.

A spur gear portion 28 is formed on the outer periphery of the front cam 26, and a small gear 31 of a rotating shaft 30 provided in parallel with the support shaft 20 meshes with the spur gear portion 28. Then, even if the support shaft 20 is moved and arranged in the axial direction in order to adjust the initial position of the split blade 7, the spur gear portion 28 is meshed with the small gear 31. Therefore,
Even when the front cam 26 moves in the axial direction, the front cam 26 can be driven to rotate. Further, since the spur gear portion 28 is formed on the outer periphery of the front cam 26, a mechanism for rotating and driving the front cam 26 can be simplified.

When performing the initial adjustment, the second stopper pin 1
Since the 9 contacts the first stopper pin 29, the cam roller 18 is regulated in a state where the cam roller 18 is arranged at the highest position of the cam surface 27 a of the front cam 26. Therefore, since the cam roller 18 can be easily arranged at the end of the 78 cam surface 27a, the entire cam surface 27a of the front cam 26 can be easily used.

It should be noted that the present invention is not limited to the above-described embodiment, and may be configured as follows without departing from the spirit of the invention. (1) In the above embodiment, the male screw part 21 provided at the base end of the support shaft 20 is replaced with the female screw hole 22 provided in the pot base 4.
The front cam 26 is configured to be axially moved and adjusted by being screwed in such a manner that the front cam 26 can be fixed with a nut 23. This is slidably supported on the urn rest 4 without providing the male screw portion 21, and a plate cam, a front cam, or the like is brought into contact with the base end of the support shaft 20, and the cam is driven to drive the front face. The cam 26 may be configured to move and adjust in the axial direction. However, in this case, in order to fix the position of the cam, it is necessary to provide a screw portion or the like for fixing the rotating shaft of the cam.

(2) In the above embodiment, the spur gear portion 28 is formed on the outer periphery of the front cam 26 in order to rotate the front cam 26, and the small gear 31 is meshed with the spur gear portion 28. The spur gear 28 may be a spur gear supported by the support shaft 20, and the small gear 31 may be meshed with the spur gear.

(3) In the above embodiment, the stepping motor 33 is used as a drive motor for moving the divided blade 7 forward.
However, a DC motor, a brushless motor, or the like may be used, and the rotational position of the front cam 26 may be detected by a potentiometer or the like, and the gap may be adjusted based on the detected value of the potentiometer.

(4) In the above embodiment, the cam surface 27 of the front cam 26
a was formed so as to be proportional to the angular position of the front cam 26. According to the workability in adjusting the gap, for example, the change amount of the gap with respect to the number of steps is small when the gap is small, and the change amount of the gap becomes relatively large as the gap increases. The cam surface 27a may be designed.

[0058]

According to the present invention, the following effects can be obtained. According to the first aspect of the present invention, it is possible to reduce the loss due to the friction of the torque of the drive motor for moving the divided blade, and it is possible to reliably prevent the front cam from excessively rotating. Invention according to claim 2
According to the drive motor for moving the split blade
Loss due to friction of the motor torque can be reduced
At the same time, the initial position of the split blade can be adjusted by a simple mechanism.

According to the third aspect of the present invention, the divided shake
To the friction of the drive motor torque to move the motor
Loss can be reduced, the initial position of the split blade can be adjusted with a simple mechanism, and further, excessive rotation of the front cam can be reliably prevented. That is, according to the first to third aspects of the present invention, it is possible to reduce the size of the blade adjusting device .
According to the invention described in claim 1 and claim 3, the small size
In addition to this, the adjustment operation limit of the blade adjustment device can be clarified. According to the second and third aspects of the present invention, the mechanism for adjusting the initial position of the divided blade is simplified, so that the blade adjusting device can be further reduced in size.

According to the fourth aspect of the invention, in addition to the effects of any one of the first to third aspects,
Even if the front cam moves in the axial direction, the front cam can be driven to rotate. According to the fifth aspect of the invention, in addition to the effects of the first or third aspect of the invention, the front cam can be reliably stopped at a desired rotation phase.

According to the invention described in claim 6 , the claim
In addition to the effects of the second or third aspect , the initial position of the split blade can be adjusted at a position away from the urn roller, so that the adjustment can be easily performed. Claim
According to the seventh aspect of the invention, in addition to the effects of any one of the first to sixth aspects, the split blade can be reliably moved to the proximal end side as the push rod retreats.

According to the eighth aspect of the invention, in addition to the effects of any one of the first to seventh aspects, the divided blade can be reliably brought into contact with the pot base, and this contact is maintained. can do. According to the ninth aspect of the present invention, in addition to the effects of any one of the first to eighth aspects, in adjusting the divided blade, the divided blade and the push rod or any one of the mutual contact portions is adjusted. The influence of manufacturing accuracy can be minimized, and precise adjustment can be performed.

According to the tenth aspect , in addition to the effects of any one of the first to ninth aspects, it is possible to easily control the adjustment of the divided blade. Contract
According to the invention described in Motomeko 11, wherein claims 1 to
In addition to the effect of the invention of any one of item 10 , since the force for advancing the push rod can be made smaller, the torque of the drive motor can be made smaller. Further, even if the pressing force of the push rod is slightly large, the front cam does not rotate by this force, and the adjustment position of the blade can be maintained.

Further, as shown in the above embodiment, in the configuration using the stepping motor as the driving means of the blade adjusting device, the interval between the divided blades can be adjusted without using a position detecting means such as a potentiometer.
The adjustment can be made based on the number of operation steps of the stepping motor.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an ink fountain blade adjusting device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view in which a part of a divided blade and a fountain stand of the ink fountain blade adjusting device of FIG. 1 is sectioned;

FIGS. 3A and 3B are a perspective view of a front cam and a front view of a front cam illustrating a positional relationship with a push rod in the blade adjusting device of the ink fountain of FIG.

FIG. 4 is an explanatory diagram illustrating an arrangement state of ink fountains in a printing press.

FIG. 5 is a schematic vertical sectional view showing a conventional ink fountain blade adjusting device.

FIG. 6 is a schematic longitudinal sectional view showing another blade adjusting device of the ink fountain according to the related art.

[Explanation of symbols]

 Reference Signs List 1 frame 2 ink fountain 3 fountain roller 4 fountain stand 7 split blade 15 push rod 19 second stopper (second stopper pin) 20 support shaft 21 male screw portion 22 female screw hole 23 nut 26 front cam 27a cam surface 28 spur gear portion 29 1 Stopper (First Stopper Pin) 30 Rotation Shaft 31 Spur Gear 32 Large Gear 33 as Drive 33 Stepping Motor 35 as Drive 35 Drive Gear as Drive

Claims (11)

(57) [Claims] 1. An ink fountain (2) for storing ink.
A fountain stand (4) for supporting the ink fountain (2); a fountain roller (3) adjacent to the ink fountain (2) for delivering ink in a film form; and a shaft of the fountain roller (3). A plurality of split blades (7) which are provided in a plurality of directions and advance or retreat with respect to the urn roller (3) to form a gap for sending out ink between the tip thereof and the outer peripheral surface of the urn roller (3).
And a push rod (15) for contacting the base end of each splitting blade (7) to advance or retract the corresponding splitting blade (7) with respect to the urn roller (3). In the ink fountain blade adjusting device of the above, provided in correspondence with each of the divided blades (7), and arranged so as to be rotatable around the axis of the support shaft (20) parallel to the moving direction of the divided blade (7), A front cam (27a) having a cam surface (27a) displaced in a direction parallel to the moving direction of the split blade (7) around the axis, and a base end of the push rod (15) being in contact with the cam surface (27a). 2
6) and driving means (2) for rotating and driving the front cam (26).
8, 30, 31, 32, 33, 35) and a regulating device (19, 29) for regulating excessive rotation of the front cam (26). 2. An ink fountain for storing ink.
A fountain stand (4) for supporting the ink fountain (2); a fountain roller (3) adjacent to the ink fountain (2) for delivering ink in a film form; and a shaft of the fountain roller (3). A plurality of split blades (7) which are provided in a plurality of directions and advance or retreat with respect to the urn roller (3) to form a gap for sending out ink between the tip thereof and the outer peripheral surface of the urn roller (3).
And a push rod (15) for contacting the base end of each splitting blade (7) to advance or retract the corresponding splitting blade (7) with respect to the urn roller (3). In the ink fountain blade adjusting device of the above, provided in correspondence with each of the divided blades (7), and arranged so as to be rotatable around the axis of the support shaft (20) parallel to the moving direction of the divided blade (7), A front cam (27a) having a cam surface (27a) displaced in a direction parallel to the moving direction of the split blade (7) around the axis, and a base end of the push rod (15) being in contact with the cam surface (27a). 2
6) and position adjusting means (21, 22, 23) for adjusting the position of the front cam (26) in the axial direction by moving the support shaft (20) of the front cam (26) in parallel with the axis. Driving means (2) for rotationally driving the front cam (26)
8, 30, 31, 32, 33, 35), a blade adjusting device for an ink fountain in a printing press. 3. An ink fountain for storing ink.
A fountain stand (4) for supporting the ink fountain (2); a fountain roller (3) adjacent to the ink fountain (2) for delivering ink in a film form; and a shaft of the fountain roller (3). A plurality of split blades (7) which are provided in a plurality of directions and advance or retreat with respect to the urn roller (3) to form a gap for sending out ink between the tip thereof and the outer peripheral surface of the urn roller (3).
And a push rod (15) for contacting the base end of each splitting blade (7) to advance or retract the corresponding splitting blade (7) with respect to the urn roller (3). In the ink fountain blade adjusting device of the above, provided in correspondence with each of the divided blades (7), and arranged so as to be rotatable around the axis of the support shaft (20) parallel to the moving direction of the divided blade (7), A front cam (27a) having a cam surface (27a) displaced in a direction parallel to the moving direction of the split blade (7) around the axis, and a base end of the push rod (15) being in contact with the cam surface (27a). 2
6) and position adjusting means (21, 22, 23) for adjusting the position of the front cam (26) in the axial direction by moving the support shaft (20) of the front cam (26) in parallel with the axis. Driving means (2) for rotationally driving the front cam (26)
8, 30, 31, 32, 33, 35) and a regulating device (19, 20) for regulating excessive rotation of the front cam (26). 4. A device for adjusting a blade of an ink fountain in a printing press according to claim 1, 2 or 3 , wherein the driving means is formed around a support shaft (20) of the front cam (26). The spur gear portion (28) and its rotating shaft (30) are supported by the support shaft (2) of the front cam (26).
0), the spur gear (31) meshing with the spur gear (28) in the axial movement range of the front cam (26), and the drive units (32, 33) for rotationally driving the spur gear (31). ,
35) A blade adjusting device for an ink fountain in a printing press comprising: 5. A blade adjusting device for an ink fountain in a printing press according to claim 1 , wherein the regulating means is provided on the front cam (26), and the regulating means is provided in accordance with the displacement of the front cam (26). First stopper (29) that moves along the path of
A second stopper (19) provided on the fixed side (4 or 16) so that at least a part thereof is located on the trajectory of the first stopper (29), and which can come into contact with the moving first stopper (29); Adjustment device for ink fountain in a printing press consisting of: 6. An ink fountain blade adjusting device for a printing press according to claim 2, wherein the position adjusting means comprises a fountain roller (3) on a support shaft (20) of the front cam (26).
A male screw part (21) provided at the end opposite to the side, a female screw hole (22) provided on the pot base (4) and into which the male screw part (21) is screwed, and a female screw hole (21) An ink fountain blade adjusting device for a printing press, comprising a nut (23) fixed to (22). 7. A blade adjusting device for an ink fountain in a printing press according to claim 1, wherein a dividing blade (7) is provided between the dividing blade (7) and the fountain stand (4). An ink fountain blade adjustment device for a printing press, provided with a spring (13) for applying a force acting toward the base end of the split blade (7). 8. A blade adjusting device for an ink fountain in a printing press according to claim 1, wherein a lower surface of the split blade is slightly longer than an upper surface of the split blade, and the split blade is in contact with the push rod. An ink fountain blade adjusting device in a printing press having a tapered base end. 9. The blade adjusting device for an ink fountain in a printing press according to claim 1, wherein the tip of the push rod (15) is formed in a substantially hemispherical shape, and the push rod (15) has a shape corresponding to the split blade (7). Fish rod (1
5) A blade adjusting device for an ink fountain in a printing press, wherein the contact is made by a spherical surface and a flat surface. 10. The apparatus for adjusting a blade of an ink fountain in a printing press according to claim 1, wherein the cam surface (27a) of the front cam (26) is a front cam (2).
6) A blade adjusting device for an ink fountain in a printing press, the height position of which is proportional to the amount of angular displacement. 11. A blade adjusting device for an ink fountain in a printing press according to claim 1, wherein the cam surface (27a) of the front cam (26) is provided with a front cam (2).
6) A blade adjusting device for an ink fountain in a printing press, wherein the blade is formed in an annular shape with respect to the rotation axis, and the highest and lowest portions of the cam surface (27a) are formed adjacent to each other.