JP3392032B2 - Blanket polishing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blanket polishing apparatus for polishing a surface rubber layer of a blanket having a laminated structure to a predetermined thickness, and more particularly to a new blanket polishing main body section and a new control section. And a blanket polishing device.

[0002]

2. Description of the Related Art In offset printing, a blanket has a function of faithfully transmitting a plate pattern to a paper. As a general structure of the blanket to play such a role, for example, a laminated structure as shown in the sectional view of FIG. 6 is adopted. In order to make such a blanket, a plurality of base cloths 61, 63, 66 are bonded to each other via adhesive layers 51, 53, a sponge layer 71 is formed, and a surface rubber layer 8 is formed.
The formation of 0 is performed. The thickness and the surface physical properties of the surface rubber layer 80 are particularly important for the finally produced blanket. The accuracy of the thickness of the blanket is particularly important in terms of the specifications for mounting on the printing machine, and is also particularly important in order to make the thickness of the surface rubber layer 80 uniform and reduce variations in blanket characteristics. It can be said to be a factor.

[0003]

However, in the conventional blanket manufacturing, the thickness of the blanket is measured over time during the finishing process, and the fine adjustment of the polishing amount is automatically performed based on the measured value. That operation was not done at all. In other words, it is common to obtain the target blanket thickness by repeating the one-cycle operation of measuring the thickness after appropriately determining the polishing time and the feed amount that determines the polishing amount and performing a certain work. Was done in. In addition, since the polishing positioning mechanism in the conventional polishing apparatus is performed by the meshing of a plurality of gears, backlash between gear meshes occurs and a slight deviation occurs in the clearance, which is accurate and quick. It was difficult to position.

For this reason, the work efficiency required for polishing, which is the finishing step of the blanket, is extremely poor, and much labor is required to maintain the uniformity of quality.

The present invention was devised under such circumstances, and its purpose is to solve the above-mentioned inconvenience,
It is an object of the present invention to provide a blanket polishing apparatus that can improve the work efficiency required for polishing, which is a finishing step of a blanket, can further obtain quality stability, and can improve product yield.

[0006]

In order to solve such a problem, a blanket polishing apparatus of the present invention detects a blanket polishing main body for polishing a surface rubber layer of a blanket and a thickness of the blanket. And a control unit for adjusting the polishing amount of the surface rubber layer based on the detected value, and the blanket polishing main body unit includes a polishing roll mechanism unit including a polishing roll rotatably supported. And a blanket rotary roll mechanism section provided with a blanket rotary roller rotatably supported while the blanket is placed around the polishing roll, and the blanket rotary roll mechanism section slides. A movable body having a movable moving part and having pressing end surfaces formed on both sides for sliding movement, and one pressing end surface of the moving body. A pressing mechanism portion that presses with a constant force on the moving body and the other pressing end surface of the moving body while pressing the pressing force of the pressing mechanism portion to move the moving body and move the moving body from the control unit. And an adjustment mechanism section for receiving and adjusting a control signal.

Further, in the present invention, the pressing force of the moving body when the adjusting mechanism section is operating by pressing the other pressing end surface of the moving body is set to be larger than the pressing force of the pressing mechanism section. To be done.

In a preferred aspect of the present invention, the control section measures the drive load of the polishing roll during operation of the apparatus, and detects the blanket thickness when the drive load falls below a predetermined value. Is performed, and the polishing amount is controlled based on the detected value.

As a preferred aspect of the present invention, the control unit is further configured to measure the mass of the blanket during traveling by β-ray irradiation.

In a preferred aspect of the present invention, the adjusting mechanism portion includes a rod-shaped jack screw that abuts on the other pressing end surface of the moving body and reciprocates along the sliding movement direction of the moving body. The adjustment mechanism is driven by a servo motor.

According to the blanket polishing main body used in the present invention, one pressing end surface of the moving body is always pressed by the pressing mechanism with a constant force, and when adjusting the clearance (adjusting the blanket polishing). Adopts a structure for moving the moving body by pushing the other pressing end surface of the moving body with a force larger than the pressing force of the pressing mechanism section. Therefore, during and after the clearance adjustment (adjusting the polishing amount of the blanket), one pressing end surface of the moving body is pressed by the pressing mechanism section with a constant force, so that the occurrence of backlash can be prevented and the accuracy can be improved. And it can be positioned quickly. Based on the use of such a blanket polishing body that enables quick and highly accurate positioning,
By providing a control unit that detects the thickness of the blanket and adjusts the polishing amount of the surface rubber layer based on the detected value, it is possible to improve the work efficiency required for polishing and further improve the quality. Stability is obtained and the product yield is improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a schematic overall view of a blanket polishing apparatus 1 of the present invention as a front view. The blanket polishing device 1 is a device used for polishing the surface rubber layer of the blanket 45 formed in a laminated structure to finish it to a predetermined thickness (in a so-called final finishing process step).

Blanket polishing apparatus 1 according to the present invention
As shown in FIG. 1, the blanket polishing main body 100 for polishing the surface rubber layer of the blanket and the thickness of the blanket are detected, and the polishing amount of the surface rubber layer is adjusted based on the detected value. Control unit 200 for
And have. Band-shaped blanket 4 to be polished
No. 5 is looped around in the device and runs endlessly.

FIG. 2 is a schematic front view showing a preferred example of the blanket polishing body 100 used in the present invention. First, referring to FIG. 2 and FIG. The section 100 will be described in detail.

As shown in FIG. 1, in the blanket polishing main body 100, the rubber surface of the blanket 45 which is continuously wound around the blanket rotating roll 40 is conveyed by the polishing roll 50 (driven by the drive motor 31). This is an apparatus for continuously polishing, and the clearance between the blanket rotary roll 40 (rubber layer surface) and the polishing roll 50 is adjusted.

A more detailed structure is shown in FIG. 2, in which the blanket polishing body 100 used in the present invention includes a polishing roll mechanism unit K having a polishing roll 50 rotatably supported, and this polishing roll. It has a blanket rotary roll mechanism B including a blanket rotary roll 40, which is arranged so as to face the blanket 50, around which a blanket 45 is wound and which is rotatably supported. The blanket rotary roll mechanism B is, as shown in the figure, a block-shaped moving body 2 for mounting the blanket rotary roll 40.
5, the moving body 25 has a moving portion combined with the slide guide 27, and can slide on the slide guide 27 (arrow (a) and (b) directions). Pressing end faces 25a and 25b are formed on both sides (arrow (a) and (b) direction sides) of the moving body 25 that can slide.

One pressing end surface 25a of the moving body 25
Is, for example, a hydraulic cylinder 21 and a pressing member 2 as shown in FIG.
The pressing mechanism 20 such as 3 always presses in the arrow (B) direction with a constant force. On the other hand, the moving body 25
The other pressing end surface 25b can be pressed in the arrow (a) direction by the adjusting mechanism 10 for adjusting the position of the moving body 25. The adjusting mechanism 10 is further illustrated in FIG.
FIG. 4 also shows the detailed configuration thereof, which includes a servomotor 15 as a drive source of the adjusting mechanism, a worm gear 19 fixed to the tip of the drive shaft of this motor through a joint 17, and this worm gear 19 A spur gear 11 meshed with the spur gear 11 and a rod-shaped jack screw 13 that is inserted into the center of the spur gear 11 and meshes with a screw formed in the center of the spur gear 11 Bearings and the like for supporting the members are not shown in the drawing because they are generally used. Jack screw 13
One end of the movable body 25 is always in contact with the other pressing end surface 25b of the movable body 25 so that the movable body 25 can reciprocate in the sliding direction. That is,
The adjusting mechanism unit 10 having such a configuration can move the rod-shaped jack screw 13 to both sides in the axial direction (both directions of arrows in FIG. 4) by driving the servo motor 15.

When the adjusting mechanism portion 10 is operated to press the other pressing end surface 25b of the moving body 25, the pressing force exerted by the adjusting mechanism portion 10 on the moving body 25 is exerted by the pressing mechanism portion 20 from the opposite side. It is set larger than the pressing force. Therefore, the position of the moving body 25 can be adjusted while the moving body 25 is pressed and moved by the adjusting mechanism unit 10. Of course, the adjusting mechanism section 10 stops pressing and the jack screw 1
When 3 moves backward in the arrow (b) direction, the moving body 25 is pressed by the pressing mechanism portion 20 and can move in the arrow (b) direction.

In the present invention, as shown in FIG. 2, the polishing roll 5 faces the moving body 25.
A position fixing member 35 for mounting 0 (driven by the drive motor 31) is arranged.

The operation of the blanket polishing main body 100 used in the present invention described above will be briefly described below. In the case of this embodiment, the position of the polishing roll 50 is fixed, and only the blanket rotating roll 40 can be moved and adjusted.

One pressing end surface 25a of the moving body 25 on which the blanket rotating roll 40 is installed is constantly pressed by the pressing mechanism portion 20 such as the hydraulic cylinder 21 and the pressing member 23 in the arrow (B) direction with a constant force. Has been done.

Next, the blanket rotating roll 40
In order to adjust the clearance between the blanket 45 (which the blanket 45 is wound around) and the polishing roll 50 (adjust the blanket polishing amount), the adjusting mechanism unit 10 is operated to move the moving body 2.
The other pressing end surface 25b of No. 5 is pressed by the jack screw 13 in the arrow (a) direction. At this time, the pressing force exerted by the adjusting mechanism unit 10 on the moving body 25 is set to be larger than the pushing force exerted by the pressing mechanism unit 20 from the opposite side, so that the moving body 25 is moved while being pressed by the adjusting mechanism unit 10. Body 2
The position of 5 can be adjusted.

During and after this clearance adjustment (adjustment of the amount of blanket polishing), one pressing end surface 25a of the moving body 25 is constantly pressed by the pressing mechanism section 20 with a constant force, so that the adjusting mechanism section 10 Backlash can be prevented from occurring, and positioning can be performed accurately and quickly. When the adjusting mechanism unit 10 stops pressing and the jack screw 13 retracts in the arrow (B) direction, the moving body 25 is pressed by the pressing mechanism unit 21 and can move in the arrow (B) direction. .

Such a blanket polishing main body 100
By using, it is possible to prevent the occurrence of backlash in the adjustment mechanism portion, and it is possible to perform positioning accurately and quickly.

In addition to the blanket polishing body 100, the blanket polishing apparatus 1 of the present invention further detects the thickness of the blanket and adjusts the polishing amount of the surface rubber layer based on the detected value. The control unit 200 of FIG. That is, the position of the moving body 25 of the blanket polishing main body 100 described above is controlled by the control signal from the control unit 200 so that the adjusting mechanism unit 10 of the blanket polishing main body 100 (in particular, the drive of the servomotor 15) operates. It has become. As a result, the polishing amount is automatically controlled.

The control section 200 will be described below. The control unit 200 may have a function of detecting the thickness of the blanket and adjusting the polishing amount of the surface rubber layer based on the detected value. To give an example of a suitable control unit 200,
The control unit 200 includes a thickness detecting unit 205 for detecting the thickness of the blanket as shown in FIG. 1, and feedback control of the polishing amount of the surface rubber layer based on the detection value from the thickness detecting unit 205. The control unit main body 210 for performing
In the thickness detection unit 205, for example, a measurement method using laser irradiation is preferably used so that the thickness of the blanket can be detected in a non-contact manner. In addition, as a function of detecting whether the surface rubber layer is in a state of being temporarily polished or whether the temporary polishing is finished, the control unit 200 includes a load of the polishing roll 50, that is, a drive motor 31. A load detection unit 206 that detects a load is provided. This load detection value is taken into the control unit main body 210.

A flowchart showing an example of specific control is shown in FIG. In FIG. 5, as an initial setting (s1), the data value of the thickness tolerance: d and the load of the polishing roll 50, that is, the drive load of the drive motor 31: x is stored in advance in the CPU in the control unit main body 210. Next, the thickness setting value: a is taken in (s2),
Next, actual thickness detection value: b, and drive load detection value:
The y detection operation (s3) is performed. Then, it is judged whether or not the drive load detection value: y is equal to or less than the set drive load: x (s4). If the y value is not equal to or less than the x value, polishing is in progress. Since it is in the state of, the polishing is continued as it is. If the y value is less than or equal to the x value, the polishing is completed, and then it is determined whether or not the thickness of the blanket is within a predetermined range. That is, the operation of obtaining the difference between the detected thickness b of the blanket and the target thickness a, and whether or not the absolute value of this difference is within the allowable deviation d is determined (s5). If the value | b−a | does not fall within the range of the allowable deviation d (however, when overpolishing is stopped), the polishing amount of the blanket polishing main body 100 is adjusted (s6). , | B−a | value is within the range of the allowable deviation d, the polishing amount is not adjusted (s6), and the final polishing step is completed.

By providing the control unit 200 as described above, in combination with the ability of the blanket polishing main body unit 100, it is possible to realize a very accurate control of the polishing amount in real time. As a result, the stability of quality in blanket manufacturing can be guaranteed, and the yield can be improved.

Further, as shown in FIG. 1, the control unit 2
A detection mechanism 215 that detects the mass of the blanket during traveling by β-ray irradiation over time may be incorporated in 00. As a result, it is possible to indirectly ascertain the uniformity of the stacked state of the blanket that is run endlessly, and it is possible to further ensure quality. Further, as shown in FIG. 1, by incorporating an encoder 220 in the polishing line and appropriately controlling the feed amount of the blanket traveling endlessly, the deviation between the position where the polishing operation is performed and the detection position is corrected. It can be carried out. In addition, the detected data value and the calculated result are normally displayed as appropriate.
Is configured to be displayed in.

[0030]

As described above, the blanket polishing apparatus of the present invention detects the blanket polishing main body for polishing the surface rubber layer of the blanket, the thickness of the blanket, and the detected value. And a control unit for adjusting the polishing amount of the surface rubber layer, the blanket polishing main body unit includes a polishing roll mechanism unit including a polishing roll rotatably supported, and a polishing roll mechanism unit facing the polishing roll. A blanket rotary roll mechanism unit is provided that is provided with a blanket rotary roll that is rotatably supported while being placed around the blanket, and the blanket rotary roll mechanism unit includes a sliding movable unit.
A moving body having pressing end faces formed on both sides of the sliding movement, a pressing mechanism portion that constantly presses one pressing end face of the moving body with a constant force, and a pressing force on the other pressing end face of the moving body. Since it is configured to have an adjusting mechanism section for overcoming the pressing force of the pressing mechanism section to move the moving body and adjusting the position of the moving body by receiving a control signal from the control section. It becomes possible to control the blanket polishing amount with extremely high accuracy. As a result, the work efficiency required for polishing, which is a blanket finishing process, can be improved, the quality can be stabilized, and the product yield can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic overall view of a blanket polishing apparatus of the present invention.

FIG. 2 is a schematic front view showing an embodiment of a blanket polishing body used in the present invention.

FIG. 3 is a side view showing a detailed configuration of an adjusting mechanism section used in the present invention.

FIG. 4 is a front view showing a detailed configuration of an adjusting mechanism portion used in the present invention, and particularly, a view showing the movement of the jack screw in an easily understandable manner.

FIG. 5 is a flowchart showing an example of specific control in the present invention.

FIG. 6 is a cross-sectional view for explaining a general structure of a blanket.

[Explanation of symbols]

1 ... Blanket polishing machine 10 ... Adjustment mechanism section 20 ... Pressing mechanism 25 ... Mobile 25a ... One pressing end surface of the moving body 25b ... The other pressing end surface of the moving body 40 ... Rotating roll for blanket 50 ... Polishing roll 100 ... Blanket polishing body 200 ... Control unit 205 ... Thickness detection unit 210 ... Control unit body

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-69294 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B24B 49/04 B24B 7/12 B41N 10 / 00

Claims (5)

(57) [Claims] 1. A blanket polishing apparatus for polishing a surface rubber layer of a blanket having a laminated structure to a predetermined thickness, the apparatus comprising a blanket polishing body for polishing a surface rubber layer of a blanket. And a control unit for detecting the thickness of the blanket and adjusting the polishing amount of the surface rubber layer based on the detected value. A polishing roll mechanism unit including a supported polishing roll, and a blanket rotation roll mechanism unit including a blanket rotation roll that is rotatably rotatably supported and rotatably rotatably supported by the blanket and is laid around the polishing roll. The blanket rotating roll mechanism section includes a moving section that is slidable, and pressing end surfaces are formed on both sides of the sliding movement. Moving body, a pressing mechanism portion that constantly presses one pressing end surface of the moving body with a constant force, and moves while overcoming the pressing force of the pressing mechanism portion while pressing the other pressing end surface of the moving body. An adjusting mechanism unit for moving the body and adjusting the position of the moving body in response to a control signal from the control unit. 2. The pressing force of the moving body when the adjusting mechanism section is operating by pressing the other pressing end surface of the moving body is set to be larger than the pressing force of the pressing mechanism section. The blanket polishing device described. 3. The control unit measures the drive load of the polishing roll during the operation of the apparatus, and when the drive load becomes a predetermined value or less, the blanket thickness is detected, and based on the detected value. The blanket polishing apparatus according to claim 1 or 2, wherein the polishing amount is controlled by means of polishing. 4. The blanket polishing apparatus according to claim 3, wherein the control unit further measures the mass of the blanket during traveling by β-ray irradiation. 5. The adjusting mechanism section includes a rod-shaped jack screw that abuts on the other pressing end surface of the moving body and reciprocates along the sliding movement direction of the moving body, and the adjustment mechanism section is driven by a servomotor. The blanket polishing apparatus according to any one of claims 1 to 4, which is performed by the method.