JP2012131139A - Printing apparatus, and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing apparatus and a printing method which can print on both faces of a release sheet having an adhesive sheet temporarily adhered thereto and having superior versatility for selecting a printing face of a raw roll.SOLUTION: The printing apparatus 1 includes: a feed-out means 2 for feeding-out the raw roll R constituted of a band-like adhesive sheet S temporarily adhered on one surface of a band-like release sheet RL; a bypassing means 3 for temporarily releasing the release sheet RL from the adhesive sheet S of the raw roll R fed by the feed-out means 2 and bypassing it; a first printing means 4A for printing on at least one surface of the release sheet RL bypassed from the adhesive sheet S by the bypassing means 3; and a temporary readhering means 7 for temporarily readhering the adhesive sheet S to the release sheet RL which has been applied with printing by the first printing means 4A.

Description

  The present invention relates to a printing apparatus and a printing method.

2. Description of the Related Art Conventionally, there is known a printing apparatus that performs printing on an original fabric in which a strip-shaped adhesive sheet is temporarily attached to a strip-shaped release sheet (see, for example, Patent Document 1).
In the printing apparatus described in Patent Document 1, the original fabric is conveyed and driven by two drive rollers provided on the upstream side and the downstream side in the conveyance direction of the original fabric, and a difference in rotational speed is given to these drive rollers, so While applying a predetermined tension to the adhesive sheet, printing is performed on both surfaces of the adhesive sheet by bypassing the release sheet from the adhesive sheet.

Japanese Patent No. 4408945

  However, since the printing apparatus described in Patent Document 1 is not configured to perform printing on the release sheet, for example, printing cannot be performed on the release surface of the release sheet. There is a problem of lack of versatility for selection.

  The present invention provides a printing apparatus and a printing method that can perform printing on any surface of a release sheet to which an adhesive sheet is temporarily attached, and are excellent in versatility for selecting a printing surface of an original fabric. It is in.

  In order to achieve the above object, a printing apparatus according to the present invention includes a feeding unit that feeds an original fabric in which a strip-shaped adhesive sheet is temporarily attached to one surface of a strip-shaped release sheet, and an original fabric fed by the feeding unit. A detouring unit that once delaminates the debonding sheet from the adhesive sheet, a first printing unit that prints on at least one surface of the delamination sheet detoured by the detouring unit, and printing by the first printing unit. Reattachment means for reattaching the adhesive sheet to the peeled release sheet.

The printing apparatus of the present invention preferably includes release sheet tension applying means for applying a predetermined tension to the release sheet bypassed by the bypass means.
Moreover, it is preferable that the printing apparatus of this invention is equipped with the 2nd printing means which prints to the adhesive bond layer at least of the adhesive sheet by which the peeling sheet was bypassed by the said bypass means.
Furthermore, the printing apparatus according to the present invention includes an alignment unit that adjusts a positional relationship between the release sheet bypassed by the bypass unit and the adhesive sheet bypassed with the release sheet to a predetermined positional relationship. It is preferable to provide.

  On the other hand, according to the printing method of the present invention, the original sheet in which the band-shaped adhesive sheet is temporarily attached to one surface of the band-shaped release sheet is fed out, and the release sheet is once peeled off from the fed-out original sheet adhesive sheet to make a detour. And printing is performed on at least one surface of the release sheet bypassed from the adhesive sheet, and the adhesive sheet is temporarily attached to the release sheet on which the printing has been performed.

  According to the present invention as described above, since the release sheet is printed while the release sheet is once peeled off from the original adhesive sheet, if only the surface opposite to the release surface of the release sheet is used. In addition, printing can also be performed on a release surface of a release sheet that is not normally exposed. Therefore, since printing can be performed on any surface of the release sheet to which the adhesive sheet is temporarily attached, versatility with respect to selection of the opposite printing surface can be improved.

In the present invention, if the release sheet tension applying means is provided, the sag of the release sheet during printing is prevented, so that it is possible to prevent printing defects caused by the sag of the sheet.
Moreover, if the 2nd printing means which prints on the adhesive bond layer of an adhesive sheet is provided, since printing can be performed to an adhesive sheet and a peeling sheet, versatility can further be improved.
Furthermore, if an alignment means is provided, for example, if the positional relationship between the release sheet and the adhesive sheet at the time of re-attachment is adjusted so as to be the positional relationship before peeling, the positional deviation is relatively smaller than that before peeling. In this state, the release sheet can be prevented from being temporarily attached to the adhesive sheet. In addition, for example, the printing applied to the adhesive sheet and the printing applied to the release sheet are made to correspond one-to-one, and cutting is performed on the basis of the printing applied to the surface of the adhesive sheet, so If it is counter, the printing applied to the release sheet is cut off in the middle, and the inconvenience that a single-layer adhesive sheet original fabric that does not satisfy the correspondence relationship can be solved.

1 is a schematic diagram of a printing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a printing unit used in the printing apparatus of FIG. 1.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
It should be noted that expressions that are not explicitly described in this specification, for example, indicate directions of up, down, left, right, or near side, back side, are all used with reference to FIG. Further, the X-axis direction is the left-right direction in FIG. 1, the Y-axis direction is the direction perpendicular to the paper surface in FIG. 1, and the Z-axis direction is the up-down direction in FIG.
As shown in FIG. 1, the printing apparatus 1 according to the present embodiment bypasses the release sheet RL from the adhesive sheet S temporarily attached to the release surface RL1, which is one surface of the strip-like release sheet RL, The adhesive sheet S and the release sheet RL are temporarily attached after the release sheet RL is printed. Here, in the adhesive sheet S, the adhesive layer AD is laminated on one surface of the base sheet BS, and the original fabric R temporarily attached to the release surface RL1 of the release sheet RL via the adhesive layer AD. As prepared in advance.

  The printing apparatus 1 includes a feeding unit 2 that feeds out the original fabric R, a detour unit 3 that once peels the debonding sheet RL from the adhesive sheet S of the unrolled original fabric R, and detours the adhesive sheet S by the detour unit 3. The first printing means 4A for printing at least on the peeling surface RL1 of the release sheet RL, and the second printing means 4B for printing on at least the adhesive layer AD of the adhesive sheet S where the peeling sheet RL is bypassed by the bypass means 3. A curing means 5 for curing the ink printed on the adhesive sheet S and the release sheet RL, a detection means 6 for detecting printing (not shown) applied to the release sheet RL and the adhesive sheet S, and an adhesive sheet on the release sheet RL Re-temporary attaching means 7 for re-attaching S; alignment means 8 for adjusting the positional relationship between the release sheet RL and the adhesive sheet S during temporary attachment to a predetermined positional relationship; and release sheet R And a control means 10 for controlling the means 2 to 9 etc., and the whole is supported by a base frame (not shown). Yes.

  The feeding means 2 is a driving device that supports the roll of raw material R wound in a roll and is a driving device and is driven by a rotation motor 21 that can control its driving torque and rotation speed. A drive roller 24 that is driven by a rotation motor 23 that can control the drive torque and rotation speed, and a pinch roller 25 that sandwiches the original fabric R between the drive roller 24 and the drive roller 24.

  The detour means 3 is driven by a peeling roller 31 that peels the release sheet RL from the adhesive sheet S, and rotation motors 32 and 33 that are drive devices and can control the drive torque and rotation speed thereof, and guide the release sheet RL. Detour rollers 34 and 35 for detouring, and pinch rollers 36 and 37 for sandwiching the release sheet RL between the detour rollers 34 and 35 are provided. Tension control is performed by the rotation motors 32 and 33 so that the release sheet RL bypassed from the adhesive sheet S has a predetermined tension between the bypass rollers 34 and 35. The detour rollers 34 and 35 and the rotation motors 32 and 33 constitute release sheet tension applying means TC1.

  The first printing unit 4A includes a first printing unit 4C that performs predetermined printing such as images, characters, and alignment marks (not shown) on the release surface RL1 of the release sheet RL, and the opposite side of the release surface RL1 of the release sheet RL. A second printing unit 4D that performs predetermined printing such as images, characters, and alignment marks (not shown) is provided on the release sheet back surface RL2 that is the other surface. On the other hand, the second printing means 4B is provided on the adhesive layer AD of the adhesive sheet S and the third printing unit 4E that performs predetermined printing such as images, characters, and alignment marks (not shown) on the base sheet BS of the adhesive sheet S. And a fourth printing unit 4F that performs predetermined printing of images, characters, alignment marks, and the like (not shown). As shown in FIG. 2, each of these printing units 4 </ b> C to 4 </ b> F is supported by a unit moving unit 40 that moves a support object in the X-axis direction and the Y-axis direction.

  As shown in FIG. 2, the first and third printing units 4C and 4E include a printing plate 41 provided with a predetermined printing pattern (not shown), a plate cylinder 42 to which the printing plate 41 is attached to the outer peripheral surface, and the printing plate 41. An impression cylinder 43 is provided below the cylinder 42 so as to be able to insert the original fabric R between the plate cylinder 42 and the cylinder 42. Further, above the plate cylinder 42 in the first and third printing units 4C and 4E, an ink storage unit 44 that stores ink, an ink copying roller 46 that is in contact with an ink discharge roller 45 of the ink storage unit 44, and A roller group 47 including a roller that is in contact with the ink copying roller 46 and a pair of ink application rollers 48 that are in contact with the roller of the roller group 47 and the plate cylinder 42 are provided. The second and fourth printing units 4D and 4F are different from the first and third printing units 4C and 4E in that their installation directions are inverted upside down, but the other configurations are the first and third printing. Since it is the same as units 4C and 4E, description is omitted.

  The unit moving unit 40 includes an X-axis direction moving unit 40A that moves the printing units 4C to 4F in the X-axis direction, and a Y-axis direction moving unit 40B that moves the printing units 4C to 4F in the Y-axis direction. The X-axis direction moving means 40A is a pair of driving devices as a drive device for slidingly driving an X table 40C on which the Y-axis direction moving means 40B is disposed and an X slider 40D fixed to the lower surface of the X table 40C in the X-axis direction. X single-axis robot 40E (there is another X single-axis robot 40E on the back side in FIG. 2). The Y-axis direction moving means 40B is a pair of driving devices that slide-drive the Y table 40F on which the printing units 4C to 4F are arranged and the Y slider 40G fixed to the lower surface of the Y table 40F in the Y-axis direction. Y single-axis robot 40H.

  The curing unit 5 includes first to fourth curing units 5A to 5D provided on the downstream side in the feeding direction of the adhesive sheet S or the release sheet RL in the first to fourth printing units 4C to 4F. Each of the curing units 5A to 5D includes an air spray device, an ultraviolet irradiation device, or the like, and blows air onto the printing surfaces of the adhesive sheet S and the release sheet RL to dry the ink, or uses an ultraviolet curable ink. In some cases, the ink is cured by irradiating with ultraviolet rays. The ink is cured by the curing units 5A to 5D, so that the adhesive sheet S and the release sheet RL are printed at the time of contact with each of the rollers 35, 37, 81 to 84, 87 and re-temporary attachment by the re-attachment means 7. The surface is rubbed to prevent the printed image from becoming unclear and the printed surface from becoming dirty.

  The detecting means 6 is provided on the upstream side in the feeding direction of the adhesive sheet S and the release sheet RL in the re-temporary attaching means 7. The detection means 6 includes first and second sensors 6A and 6B provided on both upper and lower sides of the adhesive sheet S, and third and fourth sensors provided on both the left and right sides of the release sheet RL extending upward from the detour roller 35. 6C and 6D, and includes a camera that images the printing surfaces of the adhesive sheet S and the release sheet RL, an optical sensor having a light emitting element and a light receiving element, and the like. The first and second sensors 6A and 6B detect predetermined portions of printing (not shown) applied to both surfaces of the adhesive sheet S, while the third and fourth sensors 6C and 6D are applied to both surfaces of the release sheet RL. A predetermined portion of printing (not shown) is detected, and a detection result can be output to the control means 10.

  The re-tacking unit 7 includes a guide roller 71 that guides the release sheet RL that has been bypassed by the bypass unit 3 in the feeding direction of the adhesive sheet S, and a pinch roller 72 that is provided so as to face the guide roller 71. The adhesive sheet S is temporarily attached to the release sheet RL by sandwiching the sheet S and the release sheet RL between the guide roller 71 and the pinch roller 72.

  The alignment means 8 is rotatably supported by fixed rollers 81 to 84 that are rotatably supported by a base frame (not shown), a linear motion motor 85 as a drive device, and a slider 86 of the linear motion motor 85, and is Z-axis. And a moving roller 87 movable in the direction. Since the adhesive sheet S is wound around the fixed rollers 81 to 84 and the moving roller 87, the length of the debonding release sheet RL is the same as the length of the adhesive sheet S detouring the release sheet RL. It is set to be length.

  The winding means 9 is a driving device that is driven by a rotation motor 91 that can control the driving torque and rotational speed thereof, and winds up the raw fabric R. A drive roller 94 that is driven by a rotation motor 93 that can control the rotation speed, and a pinch roller 95 that sandwiches the original fabric R between the drive roller 94 are provided. Here, the drive rollers 94 and 24 and the rotation motors 93 and 23 constitute the adhesive sheet tension applying means TC2, and the adhesive sheet S is set to a predetermined tension between the drive roller 94 and the drive roller 24. In addition, tension control is performed by the rotating motors 93 and 23.

  The control means 10 is constituted by a personal computer, a sequencer or the like, and is provided so that the entire operation of the printing apparatus 1 can be controlled.

The procedure for printing on the adhesive sheet S and the release sheet RL in the printing apparatus 1 will be described.
First, as shown in FIG. 1, the original fabric R is passed and the setting is completed. The printing apparatus 1 to which the activation command is input from the control unit 10 synchronously drives the rotation motors 21, 23, 32, 33, 93, and 91 to support the support roller 22, the drive roller 24, and the bypass rollers 34 and 35. Then, the driving roller 94 and the winding roller 92 are rotated to feed out the original fabric R. When the original fabric R is unwound, the third printing unit 4E performs printing (not shown) on the upper surface of the base sheet BS. The third curing unit 5C applies the ink on the base sheet BS by blowing air or irradiating ultraviolet rays from above the base sheet BS with respect to the raw sheet R printed on the base sheet BS. Harden. Then, the release sheet RL is guided downward by the release roller 31 and guided to the first printing unit 4C, and the adhesive sheet S is guided to the fourth printing unit 4F.

  When the release sheet RL is bypassed from the adhesive sheet S, the fourth printing unit 4F performs printing (not shown) on the adhesive layer AD of the adhesive sheet S exposed by peeling, and the fourth curing unit 5D The ink on the adhesive layer AD is cured in the same manner as described above for AD. The adhesive sheet S printed in this way is guided in the direction of the re-tacking means 7 via the positioning means 8.

  On the other hand, the first printing unit 4C guided with the release sheet RL performs printing on the release surface RL1 of the release sheet RL, and the first curing unit 5A cures the ink on the release surface RL1 in the same manner as described above. The second printing unit 4D prints on the release sheet back surface RL2, and the second curing unit 5B cures the ink on the surface in the same manner as described above.

The adhesive sheet S and the release sheet RL that have been printed on both sides in this way are respectively sent to the re-temporary attaching means 7, and the adhesive sheet S is re-attached to the release sheet RL.
Here, from the viewpoint of effective use of the original fabric R, the printing apparatus 1 sends the original fabric R once in the direction opposite to the feeding direction in order to reduce the blank area where the original fabric R is not printed. After filling in the blank portion, the original R is sent again in the feeding direction to perform the next printing. Along with this, the adhesive sheet S and the release sheet RL are repeatedly peeled in the forward and reverse directions while being peeled from each other, so that the tension of the adhesive sheet S and the release sheet RL decreases or increases as it is, In some cases, the printing in each of the printing units 4A and 4B is distorted or deformed, so that clear printing cannot be performed.

  For this reason, the control means 10 controls the torque or rotational speed of the rotation motors 23, 93, 32, 33 via the adhesive sheet tension applying means TC2 and the release sheet tension applying means TC1, and the adhesive sheet S and the release sheet RL. Tension control is performed in order to apply a predetermined tension to each. That is, the adhesive sheet tension applying means TC2 and the release sheet tension applying means TC1 rotate the torques of the rotating motors 33 and 93 when the original fabric R is fed from the feeding means 2 side to the winding means 9 side. The rotation motors 23, 23 are set so as to be larger by a predetermined amount than the torques of the motors 32, 23, or the rotation speeds of the rotation motors 33, 93 are higher than the rotation speeds of the rotation motors 32, 23 by a predetermined speed. 93, 32, 33 are controlled, and when the raw fabric R is sent from the winding means 9 side toward the feeding means 2, the torque of the rotation motors 32, 23 is greater than the torque of the rotation motors 33, 93. The rotation motors 23, 93, 32, 33 are controlled so that the rotation motors 32, 23 are rotated by a predetermined amount or the rotation speeds of the rotation motors 32, 23 are higher than the rotation speeds of the rotation motors 33, 93. . By this tension control, sagging of the adhesive sheet S and the release sheet RL can be prevented, and printing defects accompanying a decrease or increase in tension can be prevented.

  Further, the first to fourth sensors 6 </ b> A to 6 </ b> D detect predetermined portions of printing printed on both surfaces of the adhesive sheet S and the release sheet RL, and output the detection results to the control means 10. Based on the detection results input from the first and second sensors 6A and 6B, the control means 10 deviates from the amount of printing applied to the base sheet BS and the printing applied to the adhesive layer AD. Based on the calculation result, the third and fourth printing units 4E and 4F are moved in the X and Y axis directions through the unit moving means 40, respectively. Thereby, positioning of the printing printed on both surfaces of the adhesive sheet S is performed. Further, the control means 10 determines how much the printing applied to the peeling surface RL1 and the printing applied to the peeling sheet back surface RL2 are shifted based on the detection results input from the third and fourth sensors 6C and 6D. Based on the calculation result, the first and second printing units 4C and 4D are moved in the X and Y axis directions via the unit moving means 40, respectively. Thereby, positioning of the printing printed on both surfaces of release sheet RL is performed. Further, the control means 10 determines how much the printing applied to the base sheet BS and the printing applied to the peeling surface RL1 are shifted based on the detection results input from the first and third sensors 6A and 6C. Then, based on the calculation result, the moving roller 87 is moved in the Z-axis direction via the linear motor 85. Thereby, the adhesive sheet S and the re-attached release sheet RL are positioned.

  When the adhesive sheet S and the release sheet RL are printed over the entire length of the original fabric R, and the adhesive sheet S and the release sheet RL are positioned and re-attached, the original fabric R is rotated by the rotation of the driving roller 94. The printing apparatus 1 is sent to the take-up roller 92 and taken up by the take-up roller 92. When the completion command is input after the take-up of the original fabric R is completed, the printing apparatus 1 receives the rotation motors 21, 23, 32, 33, 93 and 91 are stopped to prepare for printing of the next original fabric R.

According to this embodiment as described above, the following effects are obtained.
That is, since the printing apparatus 1 performs the printing on the release sheet RL while the release sheet RL is once peeled off from the adhesive sheet S of the original fabric R and detoured, not only the release sheet back surface RL2 but also the normal exposure. Printing can also be performed on the peeled surface RL1. Accordingly, since printing can be performed on any surface of the release sheet RL to which the adhesive sheet S is temporarily attached, versatility with respect to selection of the printing surface can be improved.

  As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations. In addition, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

  For example, in the embodiment, the printing apparatus 1 includes the first to fourth printing units 4C to 4F. However, the number and arrangement of the printing units are not limited to the configuration of the embodiment. For example, only the first and second printing units 4C and 4D may be provided and printing may be performed only on the release sheet RL.

  In the above-described embodiment, the control unit 10 is configured to automatically perform the printing positioning and the re-temporary shift adjustment between the adhesive sheet S and the release sheet RL. The first to fourth printing units 4C to 4F may be moved, the position of the printing plate 41 of the first to fourth printing units 4C to 4F may be adjusted, or the moving roller 87 may be moved. In this case, the presence / absence of misalignment detection by the control means 10 and the misalignment amount are displayed on a display device (not shown) to inform the operator of the misalignment status of printing and the misalignment status between the adhesive sheet S and the release sheet RL. be able to.

  Further, without providing the rotation motors 23 and 93, the drive rollers 24 and 94, and the pinch rollers 25 and 95, the supporting sheet 22, the rotation motors 21 and 91, and the take-up roller 92 are used as the adhesive sheet tension applying means TC2. It may be configured.

  As the first and second printing means 4A and 4B, a thermal head, a dot impact printer, a laser printer, an ink jet printer, or the like can be employed. In addition, the present invention may be applied not only to the rotary printing apparatus 1 but also to, for example, a screen printing machine.

  The drive device in the embodiment includes an electric device such as a rotation motor, a linear motion motor, a linear motor, a single-axis robot, and an articulated robot, an actuator such as an air cylinder, a hydraulic cylinder, a rodless cylinder, and a rotary cylinder. In addition to these, a combination of them directly or indirectly may be employed (some of them overlap with those exemplified in the embodiment).

DESCRIPTION OF SYMBOLS 1 Printing apparatus 2 Feeding means 3 Detouring means 4A 1st printing means 4B 2nd printing means 5 Curing means 7 Re-sticking means 8 Positioning means AD Adhesive layer R Original fabric RL Release sheet S Adhesive sheet TC1 Release sheet tension applying means

Claims (5)

A feeding means for feeding out the original fabric in which the belt-like adhesive sheet is temporarily attached to one surface of the belt-like release sheet;
Detour means for once debonding the release sheet from the original adhesive sheet fed by the feed means,
First printing means for printing on at least one surface of the release sheet bypassed by the bypass means;
A printing apparatus comprising: a re-attaching unit that re-attaches the adhesive sheet to the release sheet that has been printed by the first printing unit.   The printing apparatus according to claim 1, further comprising a release sheet tension applying unit that applies a predetermined tension to the release sheet bypassed by the bypass unit.   The printing apparatus according to claim 1, further comprising a second printing unit that performs printing on at least an adhesive layer of the adhesive sheet in which the release sheet is bypassed by the bypass unit.   An alignment means is provided for adjusting the positional relationship between the release sheet bypassed by the bypass means and the adhesive sheet from which the release sheet is bypassed to a predetermined positional relationship. The printing apparatus according to any one of claims 1 to 3. Feed out the original fabric with the belt-like adhesive sheet temporarily attached to one side of the belt-like release sheet,
The release sheet is once peeled off from the rolled-out original adhesive sheet and detoured,
Printing on at least one side of the release sheet bypassed from the adhesive sheet;
A printing method comprising reattaching the adhesive sheet to a release sheet on which printing has been performed.

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