JP2007152602A - Device for fine adjustment of position/angle/pressure of doctor in doctor equipment for printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cope with a subtle change of a hydraulic pressure due to drying of ink, coating or the like at the tip of a doctor and with clogging with tiny refuse or the like. <P>SOLUTION: A pressure supply source and a variable tube body 4 which is connected to the pressure supply source through the intermediary of a pressure regulating valve and made expansible in the direction of the outside diameter or contractible in the direction of the inside diameter by a supply pressure from the pressure supply source, are provided. The variable tube body 4 is disposed on the undersurface side of a doctor blade P fixed in a doctor holder 11 and the degree of the curvature of the doctor blade P itself brought about with rotation of a plate roll Q is thereby made controllable. The pressure regulating valve is connected through a controller to a pressure sensor which is provided on the variable tube body 4 side so as to convert the pressure inside the variable tube body 4 into an electric signal. Based on the electric signal of the pressure sensor received by the controller, the pressure regulating valve itself is operated and thereby the pressure fluctuation inside the variable tube body 4 can be controlled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is for a printer capable of removing, for example, blurring, plate fogging, coating unevenness, coating stripes and the like when used in a printing machine such as gravure printing, a coating machine such as gravure coating, roll coating, etc. The present invention relates to a doctor position / angle / pressure fine adjustment device in a doctor device.

  Conventionally, a doctor device for a printing press in a printing machine or a coating machine has finely adjusted printing or coating by adjusting the position and angle of the body of the doctor device. In addition, the adjustment of the pressing force is performed on these adjusting portions using a spring, an air cylinder, or the like.

  As a conventional doctor knife device for a gravure printing machine, as disclosed in Patent Document 1, two doctor knives, a knife A positioned in front of the plate cylinder and a knife B positioned in the rear, are in contact with the plate cylinder. Some are arranged in a configuration, and the pressure of the knife A is larger than the pressure of the knife B.

Further, as disclosed in Patent Document 2 as a conventional doctor apparatus for an intaglio printing press, the operating stroke of a doctor blade that is displaceable with respect to a printing cylinder can be adjusted, and a motor-driven rotary tilt fixed to a frame. The plate drives the doctor blade with a displaceable beam, and the operating stroke of the doctor blade is adjusted by setting the degree of pivoting of the rotating swash plate via a hand wheel connected to the adjusting lever. There is something.
JP 2001-287335 A JP-A-8-207231

  However, these conventional adjustment methods could not cope with subtle changes in fluid pressure caused by drying of ink or paint, etc. occurring at the tip of the doctor, or removal when clogged with fine dust, etc. .

  Therefore, the present invention was created in view of the conventional circumstances as described above, and its purpose is to allow fine adjustment of the pressure and pressure of the pressure on the plate roll at the tip of the doctor blade of a doctor device for a printing press. Thus, it is intended to reliably and easily remove, for example, blurring, plate fogging, coating unevenness, coating stripes, and the like during use in a printing machine such as gravure printing, a coating machine such as gravure coating, and roll coating. In addition, the doctor position and angle in the doctor device for printing presses that can cope with subtle changes in fluid pressure due to drying of ink and paint occurring at the tip of the doctor blade and removal when clogged with fine dust etc. -To provide a pressure fine adjustment device.

In order to solve the above-described problem, in the present invention, the pressure supply source 2 is connected to the pressure supply source 2 via the pressure regulating valve 3, and is supplied in the outer diameter direction by the supply pressure from the pressure supply source 2. One or a plurality of variable tube bodies 4 capable of bulging or contracting in the inner diameter direction, and a plate roll by arranging the variable tube body 4 on one side of a doctor blade P fixed in a doctor holder 11 The degree of curvature of the doctor blade P itself that occurs with the rotation of Q can be controlled.
The pressure regulating valve 3 is connected via a controller 6 to a pressure sensor 5 provided on the variable tube body 4 side so as to change the pressure inside the variable tube body 4 into an electric signal, and the pressure sensor 5 received by the controller 6 It is assumed that the pressure fluctuation in the variable tube body 4 can be controlled by operating the pressure regulating valve 3 itself based on the electric signal.
A reinforcing plate 14 is attached to at least one of the opposite surface side of the doctor blade P facing the variable tube body 4 disposed on one side of the doctor blade P or the doctor blade P surface side contacting the variable tube body 4. Shall.
The doctor holder 11 may be provided with an adjustment recess 12 that allows the doctor blade P to escape to at least one of the upper side and the lower side.

In the doctor position / angle / pressure fine adjustment device in the doctor device for a printing press according to the present invention configured as described above, the variable tube body 4 arranged on the lower surface side of the doctor blade P includes a pressure supply source. Fluid such as compressed air or working liquid from 2 is introduced or discharged through the pressure regulating valve 3.
At this time, the internal pressure of the variable tube body 4 itself is adjusted by manual adjustment of the pressure regulating valve 3, and the variable tube body 4 is expanded in the outer diameter direction or contracted in the inner diameter direction. The degree of curvature of the blade P is controlled. Thus, by changing the pressure in the variable tube body 4, the pressure and pressure of the doctor blade P tip against the plate roll Q are slightly changed.
The pressure sensor 5 converts the internal pressure of the variable tube body 4 into an electrical signal and sends it to the controller 6, and the electrical signal of the pressure sensor 5 received by the controller 6 activates the pressure regulating valve 3 itself based on this. As a result, the pressure fluctuation is subtly applied to the inside of the variable tube body 4 to remove the foreign matter at the tip of the doctor blade P and the solid matter due to the printing ink / paint drying.
Further, the reinforcing plate 14 gives strength to the thin doctor blade P itself, and the doctor blade P in contact with the plate roll Q is caused by sliding friction caused by the rotation of the plate roll Q. Prevents plastic deformation caused by distortion.
The adjustment recess 12 increases the width of the bending range of the doctor blade P by the variable tube body 4 in the doctor holder 11.

  According to the present invention, it is possible to finely adjust the pressure and pressure of the doctor blade P at the tip of the doctor blade P of the doctor device for the printing press, such as a gravure printing press, gravure coat, roll coat, etc. For example, it is possible to reliably and easily remove, for example, fading, plate fogging, coating unevenness, coating stripes, and the like during use in a coating machine or the like. In addition, it is possible to deal with subtle changes in fluid pressure due to drying of ink, paint, etc. occurring at the tip of the doctor blade P, and removal when clogged with fine dust.

  That is, this is because the present invention provides one or a plurality of variable tube bodies 4 that can be expanded in the outer diameter direction or contracted in the inner diameter direction by the supply pressure from the pressure supply source 2 via the pressure regulating valve 3. This is because the degree of curvature of the doctor blade P itself that occurs with the rotation of the plate roll Q can be controlled by arranging the doctor blade P on one side of the doctor blade P that is fixed in the inside 11. This makes it possible to finely adjust the pressure and pressure of the doctor blade P at the tip of the doctor blade P against the plate roll Q, and solve various problems occurring at the tip of the doctor blade P without changing the accuracy of printed matter and coating. It can be solved in one machine. Further, even when the doctor blade P is bent or distorted, or the doctor holder 11 itself is bent, a uniform pressure can be applied in the width direction of the plate roll Q.

  The pressure regulating valve 3 is connected via a controller 6 to a pressure sensor 5 provided on the variable tube body 4 side so as to change the pressure inside the variable tube body 4 into an electric signal, and the pressure sensor 5 received by the controller 6 Since the pressure fluctuation in the variable tube body 4 can be controlled by operating the pressure regulating valve 3 itself based on the electrical signal, the fine pressure pressure and pressure angle of the doctor blade P tip against the plate roll Q are finely adjusted. It is possible to construct a super-high sensitivity doctor system that enables automatic control in

  Further, a reinforcing plate 14 is provided on at least one of the opposite side of the doctor blade P facing the variable tube body 4 arranged on one side of the doctor blade P or the side of the doctor blade P contacting the variable tube body 4. Since it is provided, it is possible to prevent the occurrence of plastic deformation due to distortion at the time of bending of the doctor blade P caused by the rotation of the plate roll Q during use of the printing press, and the breakage associated therewith.

  In particular, in addition to the opposite side of the doctor blade P facing the variable tube body 4, a thin doctor blade is provided by attaching a reinforcing plate 14 to the doctor blade P surface side contacting the variable tube body 4. The reinforcement of P can be increased, and the occurrence of plastic deformation due to distortion at the time of bending and the accompanying breakage can be reliably prevented.

  Since the adjustment recess 12 is provided in the doctor holder 11 so as to escape to at least one of the upper side and the lower side of the doctor blade P, the bending range width of the doctor blade P by the variable tube body 4 is increased. The degree of curvature of the doctor blade P itself that occurs as the plate roll Q rotates can be controlled over a wide range.

  Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the present embodiment, a gravure printing machine is described as an example. However, the present invention is not limited to this, and it is needless to say that the present invention may be applied to a coating machine such as a gravure coater or a roll coater.

  Reference numeral 1 shown in the figure is a doctor apparatus main body provided in the gravure printing machine. As shown in FIG. 1, the doctor device main body 1 is immersed in the printing ink in an ink van K for storing printing ink such as water, and the substrate film S is placed on the outer peripheral plate surface via a pressure roller R. Is opposed to the plate roll Q formed by pressing the plate so as to approach the plate roll Q in the oblique direction. And the front-end | tip part of the thin doctor blade P of the doctor apparatus main body 1 is arrange | positioned so that it may contact | abut to the plate roll Q with the predetermined pressurization pressure and pressurization angle.

  The doctor device main body 1 is configured such that a part of the distal end side of the doctor blade P itself protrudes from the distal end side of the doctor holder 11 provided with the position deviation angle adjusting mechanism 15. That is, as shown in FIG. 2, the doctor holder 11 is divided into two parts, a lower base holder part 11a and an upper cover holder part 11b. On the upper surface of the base holder portion 11a, there is formed a wide groove-shaped adjusting recess 12 that is entirely recessed through steps 12a, 12b on both the front and rear sides. A horizontally long accommodating recess 13 is formed so that the body 4 is inserted.

  Then, from the upper side of the variable tube body 4 inserted into the accommodation recess 13 of the base holder part 11a, the doctor blade P is positioned at the position of the adjustment recess 12 so that a part of the distal end side of the doctor blade P protrudes forward of the base holder part 11a. P is attached. Further, a rectangular thin plate-like reinforcing plate 14 is disposed on the upper surface side of the doctor blade P, and the upper side of the base holder portion 11a is covered with the cover holder portion 11b and fastened and fixed with bolts or the like. By doing so, the rear side of the doctor blade P is fixed in a two-point support manner at the steps 12a and 12b on both the front and rear sides.

  At this time, the distal end portion of the reinforcing plate 14 protrudes from the distal end side of the doctor holder 11, but is shorter than the length of the doctor blade P protruding forward of the doctor holder 11. Thereby, the bending of the doctor blade P tip side is allowed.

  In order to further increase the reinforcement of the thin doctor blade P itself, a reinforcing plate 14 may be provided on the lower surface side of the doctor blade P. Moreover, you may arrange | position the several variable tube body 4 in contact with the doctor blade P lower surface side by arranging the accommodation recessed part 13 which accommodates the variable tube body 4 in multiple numbers, and adjoining. Furthermore, a plurality of variable tube bodies 4 may be arranged in one receiving recess 13.

  When the doctor blade P is not required to be reinforced, as shown in FIG. 3, when the doctor blade P is mounted at the position of the adjustment recess 12 of the base holder portion 11a, the base is directly used without using the reinforcing plate 14. The upper side of the holder part 11a may be covered with the cover holder part 11b and then fastened and fixed with a bolt or the like.

  When the doctor blade P is not reinforced as described above, in order to increase the bending range width of the doctor blade P by the variable tube body 4, the cover holder portion 11b also has the same as the adjustment recess 12 of the base holder portion 11a. A relief to the upper side of the doctor blade P may be made by providing an appropriate adjustment recess 12.

  The variable tube body 4 is connected to a branch tip end side of a plurality of feed pipes 7 branched to each other via a pressure regulating valve 3 which can switch the base end side of the feed pipe 7 manually or automatically. The pressure supply source 2 is connected. Therefore, the variable tube body 4 is expanded in the outer diameter direction or contracted in the inner diameter direction by supplying fluid such as compressed air or working liquid from the pressure supply source 2.

  Specifically, as shown in FIG. 4, the variable tube body 4 itself is long because the doctor blade P is wide. In this case, in order to efficiently supply the pressure into the variable tube body 4, for example, the feed pipe 7 branched into four or more branches, for example, at the both ends of the variable tube body 4 and the peripheral side surface, for example, It connects to a total of four places of 1/3 length position and 2/3 position.

  Further, a pressure sensor 5 for changing the pressure inside the variable tube body 4 into an electric signal is attached to one of the plurality of feeding pipes 7, and the pressure sensor 5 and the pressure adjusting valve 3 are connected to the controller. 6 is connected. Therefore, the pressure regulating valve 3 itself is operated based on the electrical signal of the pressure sensor 5 received by the controller 6 to automatically control the pressure fluctuation inside the variable tube body 4.

  The controller 6 is connected to a defect detection device 8 provided in the printing press. When controlling the pressure regulating valve 3 by changing the pressure inside the variable tube body 4 into an electric signal by the pressure sensor 5, the defect detection device 8 receives a defect detection signal such as blurring, plate fogging, unevenness, streaks, etc. The above-mentioned defect is removed by controlling P.

  Note that the pressure in the variable tube body 4 can be adjusted directly by manually switching the pressure adjusting valve 3 from the pressure supply source 2 without depending on the automatic control by the controller 6. You may make it do.

  Next, an example of assembly, use, and operation of the best mode configured as described above will be described. As shown in FIG. 2, first, the variable tube body 4 is inserted into the receiving recess 13 of the base holder portion 11a, and the doctor blade P is positioned and mounted at the position of the adjustment recess 12 so as to cover the upper side of the variable tube body 4. deep.

  Then, after the reinforcing plate 14 is arranged on the upper surface side of the doctor blade P, the upper side of the base holder portion 11a is covered with the cover holder portion 11b and fastened and fixed with a bolt or the like. At this time, a part of the front end side of the doctor blade P protrudes to the front side of the doctor holder 11 in a state where the rear side of the doctor blade P is fixed to the two-point support at the steps 12a and 12b before and after the adjustment recess 12 of the base holder portion 11a. Arrange to do.

  When the printing press is used, the distal end portion of the doctor blade P is placed in contact with the plate roll Q as shown in FIG. At this time, the doctor blade P is arranged along a straight line without being curved.

  When the front end of the doctor blade P is in contact with the plate roll Q and the plate roll Q is rotated in the clockwise direction, the doctor blade P is slidably contacted with the plate roll Q by the sliding frictional force shown in FIG. As shown in b), it is forcibly bent and deformed downward in a bow shape or arc shape.

  The doctor blade P curved and deformed in this way crushes the variable tube body 4 on the lower side, the pressure inside the variable tube body 4 is read by the pressure sensor 5, and the pressure signal is sent to the controller 6 to adjust the pressure. Control of the on-off valve operation of the valve 3 is started. At this time, the defect detecting device 8 receives a defect detection signal such as blurring, plate fogging, unevenness, and streaks of the plate roll Q by the controller 6 to control the pressure regulating valve 3.

  In this way, by slightly changing the pressure in the variable tube body 4, the pressure pressure and the pressure angle with respect to the plate roll Q at the tip of the doctor blade P are slightly changed. As a result, foreign matter at the tip of the doctor blade P, solid matter due to printing ink and paint drying, etc. are surely removed.

It is a schematic explanatory drawing which shows the principal part of the printing machine which attached the doctor apparatus for printing machines in the best form for implementing this invention. It is a partially cutaway sectional view showing an example of a doctor position / angle / pressure fine adjustment device similarly provided in a doctor device for a printing press. It is a partially cutaway sectional view showing an example of a doctor position / angle / pressure fine adjustment device in a state where the reinforcing plate for doctor reinforcement is also removed. It is a block diagram which similarly shows an example of the circuit structure of the pressure supply of a doctor position / angle / pressure fine adjustment apparatus. Similarly, an example of the operation of the doctor by the doctor position / angle / pressure fine adjustment device is shown, (a) is an explanatory view showing a state before using the printing press, and (b) is an explanatory view showing a state when using the printing press. .

Explanation of symbols

P ... Doctor blade Q ... Plate roll R ... Pressure roller S ... Base film K ... Ink van 1 ... Doctor device body 2 ... Pressure supply source 3 ... Pressure adjustment valve 4 ... Variable tube body 5 ... Pressure sensor 6 ... Controller 7 ... Supply Feed pipe 8 ... Defect detection device 11 ... Doctor holder 11a ... Base holder portion 11b ... Cover holder portion 12 ... Adjustment recess 12a, 12b ... Step 13 ... Housing recess 14 ... Reinforcement plate 15 ... Position deviation angle adjustment mechanism

Claims (4)

  A pressure supply source, and one or a plurality of variable tube bodies connected to the pressure supply source via a pressure regulating valve and capable of expanding in the outer diameter direction or contracting in the inner diameter direction by the supply pressure from the pressure supply source; It is possible to control the degree of curvature of the doctor blade itself caused by the rotation of the plate roll by arranging the variable tube body on one side of the doctor blade fixed in the doctor holder. Doctor position / angle / pressure fine adjustment device for doctor devices for printing presses.   The pressure adjustment valve is connected to a pressure sensor provided on the variable tube body side through a controller so as to change the pressure inside the variable tube body into an electric signal, and based on the electric signal of the pressure sensor received by the controller The doctor position / angle / pressure fine adjustment device in the doctor device for a printing press according to claim 1, wherein the pressure fluctuation in the variable tube body can be controlled by operating the tube itself.   3. The reinforcing plate is attached to at least one of the opposite side of the doctor blade facing the variable tube body arranged on one side of the doctor blade or the doctor blade surface side contacting the variable tube body. Doctor position / angle / pressure fine adjustment device for doctors for printing presses. The doctor position, angle, and angle in the doctor device for a printing press according to any one of claims 1 to 3, wherein an adjustment recess is provided in the doctor holder to escape to at least one of the upper side and the lower side of the doctor blade. Pressure fine adjustment device.

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