JP2011083985A - Blanket lining apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blanket lining apparatus which can easily paste a lining sheet on the rear surface of a blanket, and can extend the durable period of the blanket. <P>SOLUTION: One end of the lining sheet 13 is attached to the lining sheet attaching section 34 of a rotary drum 21, and one end of the blanket 12 is attached to the blanket attaching section 30 of the rotary drum 21. An adhesive layer 17 is provided on one surface 13a of the lining sheet 13 which faces the rear surface 12b of the blanket 12. The other end side of the blanket 12 is supported by a plurality of handling rollers 32 in a manner to separate from the lining sheet 13 and the rotary drum 21. By rotating the rotary drum 21, the blanket 12 and the lining sheet 13 are wound around the peripheral surface of the rotary drum 21 from the one end of the blanket 12 and the one end of the lining sheet 13. The blanket 12 and the lining sheet 13 are pressed to the peripheral surface of the rotary drum 21 by a pressing roller 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blanket backing apparatus that attaches a backing sheet to the back surface of a blanket.

  2. Description of the Related Art Conventionally, in offset printing rotary presses, the image ink drawn on the plate of the printing cylinder is transferred to the blanket cylinder blanket, and the ink transferred to the blanket passes between the blanket cylinder and the impression cylinder. Transferred to the printer and printed.

  The blanket is made of an elastic member such as rubber. When printing, the blanket is crushed and thinned by using it for a predetermined period due to the contact with the printing cylinder and the impression cylinder and applying the printing pressure to obtain the desired print quality. When the necessary printing pressure is insufficient or the surface is damaged, it is replaced with a new one.

  In addition, a thin sheet may be interposed between the blanket and the peripheral surface of the blanket cylinder. In this case, if the blanket is thin, it is necessary to replace the thinned sheet with a thicker sheet. However, since it is not easy to replace the sheet, it has become common not to use the sheet (see, for example, Patent Document 1).

  Ink used in offset printing rotary presses has conventionally used ink mainly composed of mineral oil, but recently it has been switched to so-called eco inks mainly composed of environment-friendly vegetable oil.

JP-A-6-166282 (page 2)

  In the case of using conventional mineral oil as the main component, the blanket swells due to the influence of the mineral oil that is the main component, so the blanket will be thin even under the influence of printing pressure If it takes a relatively long period of time and the surface of the blanket is not damaged, it can be used for about 8 months, for example.

  However, when used after switching to eco ink, since the main component is vegetable oil, the blanket does not swell and is easily affected by the printing pressure, and the blanket tends to become thin relatively quickly. For example, it is used for about 4 months. Just doing this will cause insufficient printing pressure.

  As described above, since the eco ink is used instead of the ink mainly composed of mineral oil, the durability period of the blanket is shortened, and the frequency of replacing the blanket with a new one is increasing.

  Further, if the blanket is thin, a thin sheet may be interposed between the blanket and the blanket cylinder, but it is not easy to intervene the sheet and is not implemented at present.

  As a reason why it is not easy to interpose a sheet, it is conceivable that a sheet is attached to the back side of the blanket. For example, when attaching a sheet to a blanket that is flat in a flat place, When wound along the circumference of the cylinder, there is a problem that the sheet is likely to wrinkle and the printing pressure of the blanket is likely to be affected. In addition, there is a problem that a wide space for spreading a blanket and attaching a sheet is required in the vicinity of the rotary press.

  The present invention has been made in view of such points, and an object of the present invention is to provide a blanket backing apparatus that can easily attach a backing sheet to the back side of the blanket and can be used by extending the useful life of the blanket. And

  The blanket backing apparatus according to claim 1, wherein the rotating drum having a blanket mounting portion on the peripheral surface and the other surface of the backing sheet having an adhesive layer formed on one surface thereof are directed toward the peripheral surface of the rotating drum. One end of the adhesive sheet is attached to a backing sheet attachment means for attaching one end of the adhesive sheet to a position near the opposite side of the rotational direction of the rotary drum from the position of the blanket attachment part of the rotary drum, and one end is attached to the blanket attachment part of the rotary drum. A blanket guide means for supporting the blanket away from the backing sheet, one end of which is attached to the rotating drum by the backing sheet attaching means, and a winding surface of the rotating drum by the rotation of the rotating drum. From the one end side of the blanket and the one end side of the backing sheet, the blanket is attached to the backing sheet. Through those that and a pressure roller which pressed against the peripheral surface of the rotary drum.

  The blanket backing apparatus according to claim 2 is the blanket backing apparatus according to claim 1, wherein the backing sheet that is wound around the circumferential surface of the rotating drum by the rotation of the rotating drum is a periphery of the rotating drum. Backing sheet guide means for guiding the sheet so as to be in close contact with the surface is provided.

  According to the blanket backing apparatus of claim 1, the backing sheet can be easily attached to the back surface of the blanket without wrinkling while the blanket and the backing sheet are wound around the rotating drum. Therefore, even when the blanket with the backing sheet attached is wrapped around the peripheral surface of the blanket cylinder and attached, the backing sheet is less likely to wrinkle, giving the blanket the desired printing pressure, and extending the useful life of the blanket. it can.

  According to the blanket backing apparatus according to claim 2, in addition to the effect of the blanket backing apparatus according to claim 1, the backing sheet wound around the circumferential surface of the rotating drum by the rotation of the rotating drum is used as a rotating drum. Since the backing sheet guide means guides it so that it is in close contact with the peripheral surface of the sheet, it becomes difficult for the backing sheet to wrinkle, and an air layer can be prevented from entering between the backing sheet and the blanket or rotating drum.

It is a side view of the blanket back sticking device which shows one embodiment of the present invention. It is a side view of the backing sheet attachment means of the same blanket backing apparatus. It is a perspective view of a blanket back sticking apparatus same as the above. It is the perspective view which attached the end of the backing sheet and the blanket to the rotating drum in the same blanket backing apparatus. It is the perspective view which wound the backing sheet and blanket of the blanket backing apparatus same as the above around the rotating drum. It is a side view of the retracted state of a blanket back sticking apparatus same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1 to FIG. 6, reference numeral 11 denotes a blanket backing device, and the backing sheet 13 is attached to the back surface 12 b of the blanket 12 by the blanket backing device 11.

  The blanket 12 is, for example, an elastic member such as rubber, and is formed into an initial rectangular sheet shape having a thickness of 2.05 mm. The blanket 12 has a front surface 12a and a back surface 12b. A member 15 is projected.

  The backing sheet 13 is, for example, a polyester film and is formed in a rectangular sheet shape having a thickness of 0.03 to 0.05 mm. The width dimension of the backing sheet 13 in the short direction is formed to be approximately the same as the width dimension of the blanket 12 in the short direction, and the length dimension in the longitudinal direction of the backing sheet 13 is greater than the length dimension of the blanket 12 in the longitudinal direction. A little shorter. The adhesive layer 17 is formed on the one surface 13a of the backing sheet 13, and the adhesive layer 17 is not formed on the opposite other surface 13b. The adhesive layer 17 is protected on the one surface 13a when the backing sheet 13 is handled. A release sheet is attached, and the release sheet is peeled off when the adhesive is used, and the adhesive layer 17 is exposed.

  Then, the blanket backing device 11 is attached to the rotating drum 21, blanket guide means 22 for supporting the other end of the blanket 12 having one end attached to the rotating drum 21 so as to be separated from the rotating drum 21, and backing the rotating drum 21. A backing sheet attaching means 23 for attaching one end of the sheet 13, a backing sheet guide means 24 for guiding the backing sheet 13 so as to be in close contact with the rotary drum 21, a tension applying means 25 for applying tension to the backing sheet 13, and A pressure roller 26 is provided for pressing the blanket 12 and the backing sheet 13 to the rotary drum 21.

  The rotating drum 21 is formed in a cylindrical shape and rotates around a central axis 29. A blanket attachment portion 30 to which one end of the blanket 12 is detachably attached is provided on the peripheral surface of the rotating drum 21. This blanket mounting part 30 shows an example in which it is formed in a groove shape along the axial direction of the rotating drum 21, but a pin or the like may be provided, and any configuration as long as one end of the blanket 12 is attached detachably It doesn't matter. Then, the mounting member 15 at one end of the blanket 12 is attached to the bracket mounting portion 30 so that the back surface 12b of the blanket 12 faces the peripheral surface of the rotating drum 21 on the rotating drum 21.

  The blanket guide means 22 includes a plurality of whirling rollers 32 that are rotatably supported by a support mechanism (not shown), and the blanket 12 has one end attached to the blanket mounting portion 30 of the rotating drum 21 by these whirling rollers 32. By supporting the back surface 12b, the blanket 12 is supported so as to be separated from the peripheral sheet of the rotating drum 21 and the backing sheet 13 whose one end is attached to the rotating drum 21 by the backing sheet mounting means 23.

  Further, the backing sheet mounting means 23 is a backing sheet mounting portion provided side by side in the vicinity of the opposite side of the rotational direction of the rotating drum 21 from the position of the blanket mounting portion 30 on the circumferential surface of the rotating drum 21. 34, and a backing sheet attachment member 35 for detachably attaching one end of the backing sheet 13 to the backing sheet attachment portion 34.

  The backing sheet attachment portion 34 is formed along the axial direction of the rotary drum 21. Positioning holes 36 are formed in the backing sheet mounting portion 34 at at least two locations in the axial direction of the rotary drum 21.

  The backing sheet attachment member 35 is formed in a long and narrow bar shape that is detachably fitted to the backing sheet attachment portion 34 and is attached to the backing sheet attachment portion 34 and attached to the backing sheet attachment portion 34. The surface of 35 is formed to have the same arc as the peripheral surface of the rotating drum 21. Positioning pins 37 for positioning the backing sheet 13 on the rotary drum 21 by being inserted into the positioning holes 36 of the backing sheet mounting portion 34 are disposed at least at two positions on the back surface of the backing sheet mounting member 35 in the longitudinal direction. Projected. The backing sheet attachment member 35 is attached by sandwiching one end of the backing sheet 13 between the backing sheet attachment portion 34.

  Further, the backing sheet guide means 24 has a guide roller 39 rotatably supported by a support mechanism (not shown) that is not shown, and the guide roller 39 rotates the rotary drum 21. By supporting the other surface 13b of the backing sheet 13 that is wound around the circumferential surface of the rotating drum 21, the other surface 13b of the backing sheet 13 is tightly wound around the circumferential surface of the rotating drum 21. To guide.

  The tension applying means 25 has a weight 41 attached to the other end of the backing sheet 13, and the backing sheet 13 is wound around the peripheral surface of the rotating drum 21 by the rotation of the rotating drum 21 with the weight 41. Tension.

  The pressure roller 26 is rotatably supported at the tip of an arm 44 that constitutes a part of a support mechanism that can swing integrally with the support shaft 43 as a center. The blanket 12 is pressed through the backing sheet 13 from the one end side of the blanket 12 and the one end side of the backing sheet 13 that are pressed by pressure and wound around the circumferential surface of the rotating drum 21 by the rotation of the rotating drum 21. Crimp to the peripheral surface.

  The blanket backing device 11 includes a backing processing position (a position indicated by a solid line in FIG. 6) in which a plurality of the separating rollers 32, the guide rollers 39, and the pressure roller 26 attach the backing sheet 13 to the back surface 12b of the blanket 12. ) And a retreat position (a position indicated by a two-dot chain line in FIG. 6) that retreats above the rotary drum 21 when the blanket 12 and the backing sheet 13 are attached to and detached from the rotary drum 21.

  Next, the operation of the blanket backing apparatus 11 will be described.

  If the same blanket 12 is used for a specified period of time on a rotary press and the blanket 12 is crushed and thinned and the printing pressure required to obtain the desired print quality is insufficient, remove the blanket 12 from the blanket cylinder. The blanket backing device 11 is attached, and the backing sheet 13 is attached to the back surface 12b of the blanket 12 by the blanket backing device 11.

  In the blanket backing apparatus 11, first, the backing sheet 13 is mounted on the rotating drum 21. At this time, the plural roller 32 and the pressure roller 26 are retracted above the rotating drum 21, and only the guide roller 39 is disposed at the lower backing processing position. Then, a backing sheet attachment member 35 is attached to one end of the backing sheet 13, and a weight 41 is attached to the other end of the backing sheet 13. One end side of the backing sheet 13 is disposed on the guide roller 39 and the rotating drum 21 so that the other surface 13b of the backing sheet 13 faces the rotating drum 21, and the backing sheet mounting member 35 is disposed on the rotating drum 21. Attach it to the backing sheet attachment part 34. At this time, the positioning pins 37 of the backing sheet mounting member 35 are inserted into the positioning holes 36 of the backing sheet mounting portion 34 to position the backing sheet 13 on the rotary drum 21. Further, the release sheet of the backing sheet 13 is peeled to expose the adhesive layer 17.

  Subsequently, the blanket 12 is attached to the rotating drum 21. At this time, a plurality of the separating rollers 32 are disposed at the lower backing processing position, and only the pressure roller 26 is retracted above the rotating drum 21. Then, one end side of the blanket 12 is arranged on the plurality of separating rollers 32 so that the back surface 12b of the blanket 12 faces the plurality of separating rollers 32, the backing sheet 13, the rotating drum 21, and the like. The attachment member 15 at one end is attached to the blanket attachment portion 30.

  After the blanket 12 is mounted, the pressure roller 26 is disposed at the lower backside processing position.

  The process up to this point is the preparation process for the backing process, and the state where the preparation process is completed is the state shown in FIGS.

  Then, by rotating the rotating drum 21 in the clockwise direction in the figure, one end side of the blanket 12 and one end side of the backing sheet 13 are drawn into and wound around the rotating drum 21, and the blanket 12 is moved by the pressure roller 26. The adhesive drum 17 of the one surface 13a of the backing sheet 13 is stuck to the back surface 12b of the blanket 12 by being pressed by the rotating drum 21 through the backing sheet 13.

  At this time, by supporting the other surface 13b of the backing sheet 13 wound around the circumferential surface of the rotating drum 21 by the guide roller 39, the other surface 13b of the backing sheet 13 is brought to the circumferential surface of the rotating drum 21. Guide it so that it wraps closely. Further, the weight 41 attached to the other end of the backing sheet 13 applies tension to the backing sheet 13 wound around the peripheral surface of the rotary drum 21. Therefore, it is difficult for the backing sheet 13 to be wrinkled, and an air layer can be prevented from entering between the backing sheet 13 and the blanket 12 or the rotating drum 21.

  As shown in FIG. 5, by rotating the rotating drum 21 almost once, the attachment of the backing sheet 13 to the back surface 12 b of the blanket 12 is completed.

  When the attachment of the backing sheet 13 is completed, the plurality of separating rollers 32, the guide roller 39 and the pressure roller 26 are retracted upward, and the blanket 12 to which the backing sheet 13 is attached is removed from the rotating drum 21.

  Thus, according to the blanket backing apparatus 11, the backing sheet 13 can be easily attached to the back surface 12b of the blanket 12 without wrinkling while the blanket 12 and the backing sheet 13 are wound around the rotary drum 21. it can. Therefore, even when the blanket 12 with the backing sheet 13 attached is wrapped around the blanket cylinder and mounted, the backing sheet 13 is less likely to wrinkle, and the backing sheet 13 can give the blanket 12 a desired printing pressure. The service life of the blanket 12 can be extended.

  The blanket guide means 22 and the backing sheet guide means 24 are not limited to rollers, and guide plates may be used, or these rollers and guide plates may be combined.

  The backing sheet attachment means 23 uses the backing sheet attachment member 35, but any configuration may be used as long as one end of the backing sheet 13 can be attached to the rotary drum 21.

  Further, the tension applying means 25 is not limited to the weight 41, and the tension may be applied using a spring or the like.

11 Blanket backing device
12 Blanket
13 Backing sheet
13a
13b Other side
17 Adhesive layer
21 Rotating drum
22 Blanket guide means
23 Backing sheet mounting means
24 Backing sheet guide means
26 Crimp roller
30 Blanket attachment

Claims (2)

A rotating drum having a blanket mounting portion on the peripheral surface;
The other side of the backing sheet having an adhesive layer formed on one side faces the circumferential surface of the rotating drum, and one end of the backing sheet is directed from the position of the blanket mounting portion of the rotating drum to the rotating direction of the rotating drum. A backing sheet mounting means for mounting in the vicinity of the opposite side,
Blanket guide means for supporting a blanket having one end attached to the blanket attachment portion of the rotating drum, separated from the backing sheet having one end attached to the rotating drum by the backing sheet attaching means,
The blanket is crimped to the peripheral surface of the rotating drum via the backing sheet from one end side of the blanket and one end side of the backing sheet that are wound around the peripheral surface of the rotating drum by the rotation of the rotating drum. A blanket backing apparatus, comprising: a pressure roller. A backing sheet guide means for guiding the backing sheet wound around the peripheral surface of the rotating drum by the rotation of the rotating drum so as to be in close contact with the peripheral surface of the rotating drum is provided. The blanket backing apparatus according to claim 1.

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