JP2011148151A - Pad cleaning device, pad printing apparatus, and pad cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an allophone produced when a pad is separated from an adhesive face of a cleaning tape and to prolong the life of the pad by inhibiting damage to the transfer face of the pad. <P>SOLUTION: The pad cleaning device 4 includes: a delivery part 40 for delivering a cleaning tape 15 having an adhesive face 16 on the surface; a recovery part 41 for recovering the cleaning tape 15 delivered from the delivery part 40; and a backing part 42 that is abutted on the reverse side of the cleaning tape 15 stretched between the delivery part 40 and the recovery part 41. In the pad cleaning device 4, a printing liquid remaining on a transfer face 30 is removed when the transfer face 30 of the pad 3 for pad printing is pressed against the adhesive face 16 in the part where the backing part 42 is abutted in the cleaning tape 15. The device 4 is equipped with a pressing member 43 that presses, from the adhesive face 16 side, the cleaning tape 15 stretched between the delivery part 40 and the recovery part 41. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a pad cleaning device that removes a printing liquid remaining on a transfer surface of a pad for pad printing, a pad printing device including the pad cleaning device, and a pad cleaning method using the pad cleaning device.

  As this type of pad cleaning device, there has conventionally been provided a device (transfer body wiping means) for cleaning the transfer surface of the pad using a cleaning tape having an adhesive surface on the surface as described in, for example, Patent Document 1 below. Has been. The pad cleaning device is applied to a feeding portion for feeding out the cleaning tape, a collecting portion for collecting the cleaning tape fed from the feeding portion, and a back surface of the cleaning tape spanned between the feeding portion and the collecting portion. And a backing part in contact therewith.

  According to the pad cleaning device having the above-described configuration, the cleaning tape described above is transferred from the feeding unit to the collection unit. And, by pressing the transfer surface of the pad against the adhesive surface of the portion of the cleaning tape to which the backing portion is applied, and then moving the pad away from the backing portion and peeling off the adhesive surface, The printing liquid remaining on the transfer surface of the pad is transferred to the adhesive surface and removed.

JP-A-1-283146

  However, in the conventional technique described above, when the pad is formed of a material that easily sticks to the adhesive surface of the cleaning tape or the adhesive strength of the adhesive surface of the cleaning tape is increased, the cleaning tape is used for cleaning the transfer surface of the pad. A hitting sound (abnormal sound) hits the backing portion occurs, and the transfer surface of the pad is likely to deteriorate.

  For example, when an adhesive (printing liquid) is applied by pad printing, a general silicone rubber pad repels the adhesive, and therefore a butyl rubber pad is used. The butyl rubber pad is easy to stick to the adhesive surface of the cleaning tape, so when peeling the pad from the adhesive surface of the cleaning tape, the cleaning tape sticks to the transfer surface of the pad by the adhesive force of the adhesive tape and pulls it up with the pad. To be separated from the backing part. Thereafter, the cleaning tape is peeled off from the transfer surface of the pad. At this time, the cleaning tape vigorously collides with the backing portion, and a loud sound is generated. Further, since the cleaning tape is peeled off from the transfer surface of the pad as described above, the damage to the transfer surface of the pad is great, and the transfer surface of the pad is likely to deteriorate.

  The present invention takes the above-described conventional problems into consideration, suppresses abnormal noise generated when the pad is peeled off from the adhesive surface of the cleaning tape, and suppresses damage to the transfer surface of the pad, thereby reducing the length of the pad. The purpose is to extend the service life.

  The pad cleaning device according to the present invention includes a feeding unit that feeds a cleaning tape having an adhesive surface on a surface thereof, a collecting unit that collects the cleaning tape fed from the feeding unit, and a space between the feeding unit and the collecting unit. A backing portion that abuts against the back surface of the cleaning tape stretched on the pad, and a transfer surface of a pad for pad printing is formed on the adhesive surface of the portion of the cleaning tape to which the backing portion is applied. In the pad cleaning device that removes the printing liquid remaining on the transfer surface by being pressed, a pressing member is provided that presses the cleaning tape stretched between the feeding portion and the recovery portion from the adhesive surface side. It is characterized by being.

Due to these characteristics, the transfer surface of the pad is pressed against the adhesive surface of the cleaning tape to which the backing portion is applied, and then the pad is moved away from the backing portion and peeled off from the adhesive surface. Thus, the printing liquid remaining on the transfer surface of the pad is transferred to the adhesive surface and removed.
Also, when the pad is peeled off from the adhesive surface, even if the cleaning tape sticks to the transfer surface of the pad due to the adhesive force of the adhesive surface, the cleaning tape is pressed from the adhesive surface side by the pressing member. The amount of the cleaning tape pulled up immediately from the transfer surface is reduced.

In the pad cleaning device according to the present invention, the pressing member may be inclined with respect to the reference line with a virtual line extending along the adhesive surface and orthogonal to the longitudinal direction of the cleaning tape as a reference line. It is preferable that it is extended.
Thus, when the pad is peeled off from the adhesive surface, the cleaning tape attached to the transfer surface of the pad is sequentially peeled from one side in the width direction of the cleaning tape by a pressing member extending obliquely with respect to the reference line. .

In the pad cleaning device according to the present invention, it is preferable that the pressing member is disposed on the upstream side in the transfer direction of the cleaning tape from a pressing position where the pad is pressed.
This prevents the printing liquid from adhering to the pressing member. That is, if the pressing member is disposed downstream of the pressing position in the cleaning tape transfer direction, the pressing member presses the cleaning tape to which the printing liquid has adhered, so that the printing liquid is not applied to the pressing member. Although there is a risk of adhesion, by disposing the pressing member upstream of the pressing position, the pressing member presses the cleaning tape to which the printing liquid has not adhered, and the printing liquid does not adhere to the pressing member.

In the pad cleaning device according to the present invention, it is preferable that the pressing member is formed of a round bar-like member, and the pressing member is provided so as to be rotatable about a shaft.
Accordingly, the pressing member that presses the adhesive surface of the cleaning tape is easily peeled off from the adhesive surface, and the cleaning tape is prevented from sticking to the pressing member.

  The pad printing apparatus according to the present invention presses the transfer surface at the tip of the pad onto the printing plate coated with the printing liquid to transfer the print pattern to the transfer surface, and presses the transfer surface against the printing surface of the substrate. A pad printing apparatus that transfers the print pattern onto the printing surface and removes the printing liquid remaining on the transfer surface includes the above-described pad cleaning device.

  Due to these features, when cleaning the pad, even if the cleaning tape sticks to the transfer surface of the pad due to the adhesive force of the adhesive surface, it is peeled off immediately, and the amount of the cleaning tape pulled up is kept small, and the backing part The momentum of the cleaning tape that collides is suppressed.

  The pad cleaning method according to the present invention includes a feeding part for feeding out a cleaning tape having an adhesive surface on a surface thereof, a collecting part for collecting the cleaning tape fed from the feeding part, and between the feeding part and the collecting part. A pad cleaning method for removing printing liquid remaining on a transfer surface of a pad for pad printing by a pad cleaning device comprising: a backing portion that contacts a back surface of the cleaning tape stretched on a surface of the cleaning tape, the cleaning tape A pressing step of pressing the transfer surface of the pad against the adhesive surface of the portion to which the backing portion is applied, and the pad is temporarily moved after moving the pad in a direction away from the backing portion. And a peeling step for peeling the cleaning tape attached to the pad from the pad. It is characterized in Rukoto.

  Because of this feature, the pad is temporarily stopped after moving the pad away from the backing part. Therefore, the adhesive force of the adhesive surface of the cleaning tape is strong or the pad is moved greatly. However, the cleaning tape is slowly and gently peeled off from the transfer surface of the pad.

  According to the pad cleaning device, the pad printing device, and the pad cleaning method according to the present invention, the amount of the cleaning tape that is pulled up when the pad is peeled off from the adhesive surface can be kept small. Can be suppressed and abnormal noise can be suppressed, and damage to the transfer surface of the pad can be suppressed to extend the life of the pad.

1 is a side view schematically showing a pad printing apparatus according to an embodiment of the present invention. It is a side view of the pad cleaning device concerning an embodiment of the invention. It is sectional drawing between AA shown in FIG. It is a top view of the pad cleaning apparatus which concerns on embodiment of this invention. It is a typical side view of a pad printer for explaining operation of a pad printer concerning an embodiment of the invention. It is a typical side view of a pad printer for explaining operation of a pad printer concerning an embodiment of the invention. It is a typical side view of a pad printer for explaining operation of a pad printer concerning an embodiment of the invention. It is a typical side view of a pad printer for explaining operation of a pad printer concerning an embodiment of the invention. It is a typical side view of a pad printer for explaining operation of a pad printer concerning an embodiment of the invention. It is sectional drawing between BB shown in FIG. It is sectional drawing of the pad cleaning apparatus for demonstrating the modification of this invention.

  Embodiments of a pad cleaning device, a pad printing device, and a pad cleaning method according to the present invention will be described below with reference to the drawings.

The pad printing apparatus 1 shown in FIG. 1 transfers a printing pattern onto the transfer surface 30 by pressing the transfer surface 30 at the tip of the pad 3 onto the printing plate 2 to which a printing liquid such as adhesive or ink is applied. 30 is a device that presses 30 against a printing surface Y of a workpiece X (printed material) to transfer a printing pattern onto the printing surface Y, and removes the printing liquid remaining on the transfer surface 30.
More specifically, the pad printing apparatus 1 includes a printing plate 2 on which characters, symbols, figures, patterns, and the like are engraved, and a pad having a transfer surface 30 that temporarily holds a printing pattern transferred from the printing plate 2. 3, a printing liquid reservoir 5 that stores a printing liquid to be applied on the printing plate 2, a squeegee 6 that scrapes off excess printing liquid on the printing plate 2, a printing plate base 7 on which the printing plate 2 is placed, The work table 8 on which the work X is placed, the pad cleaning device 4 for removing the printing liquid remaining on the transfer surface 30 of the pad 3 after transferring the print pattern from the pad 3 to the work X, and the pad 3 as the printing plate 2 A pad moving means 9 for moving between the top, the workpiece X and the pad cleaning device 4 and a pad support member 10 for supporting the pad 3 are provided. The pad printing apparatus 1 includes a printing liquid application unit (not shown) for applying a printing liquid onto the printing plate 2; a squeegee movement unit (not shown) that reciprocates the squeegee 6 along the upper surface of the printing plate 2; Is provided.

  The printing liquid reservoir 5 is a housing that contains printing liquid, and is a container having an open upper surface. A printing plate 7 is disposed on the printing liquid reservoir 5, and the upper surface of the printing liquid reservoir 5 is closed by the printing plate 7. The printing liquid reservoir 5 is not limited to a closed container whose upper surface is closed by the printing platen 7, but may be an open container whose upper surface is open.

  The printing platen 7 is a pedestal that supports the printing plate 2, and is fixed on the printing liquid reservoir 5. A rectangular recess 70 in plan view is formed on the upper surface of the printing platen 7, and the rectangular plate-shaped printing plate 2 is detachably fitted into the recess 70. The printing plate 2 is an intaglio in which a groove 20 of a printing pattern is engraved on the upper surface, and is held by being fitted inside the concave portion 70 of the printing plate base 7. The upper surface of the printing plate 2 is flush with the upper surface of the printing platen 7, and a squeegee 6 is disposed above the printing plate 2 and the printing platen 7.

  The squeegee 6 is a plate-like blade that is inclined with respect to the upper surfaces of the printing plate 2 and the printing platen 7, and the width of the squeegee 6 is at least larger than the width of the printing plate 2. The lower end surface of the squeegee 6 is inclined with respect to the surface of the squeegee 6 and is in sliding contact with the upper surface of the printing platen 7. Further, the squeegee 6 reciprocates on the inclined side along the upper surface of the printing plate 2 by a squeegee moving means (not shown).

  The work table 8 is a pedestal that supports the work X, and is disposed on the side of the printing plate 7. The work table 8 is provided with holding means (not shown) for holding the work X placed thereon.

  The pad moving means 9 includes a horizontal moving mechanism 90 that moves the pad 3 in the horizontal direction and a vertical moving mechanism 91 that moves the pad 3 in the vertical direction. The horizontal movement mechanism 90 is mounted on the printing rail 2 (printing plate 7), the workpiece X (working plate 8) and the pad cleaning device 4 horizontally above the guide rail 92, and attached to the guide rail 92 so as to be able to run. And a drive mechanism (not shown) that reciprocates the slider 93 along the guide rail 92. The vertical movement mechanism 91 includes a drive mechanism that is attached to the slider 93 and reciprocates the pad support member 10 in the vertical direction. As a driving mechanism for the horizontal moving mechanism 90 and the vertical moving mechanism 91, a known driving mechanism can be used. For example, a driving mechanism including a cylinder and a piston, a driving mechanism including a motor and a ball screw, a motor, There are a drive mechanism composed of a rack-pinion, a drive mechanism composed of a motor, a gear and a belt.

  The pad support member 10 includes a support shaft 11 connected to the movable portion 96 of the vertical movement mechanism 91 and a base plate 12 provided at the lower end of the support shaft 11. The support shaft 11 is a bar member extending in the vertical direction, and the upper end of the support shaft 11 is detachably connected to the movable portion 96 of the vertical movement mechanism 91. The base plate 12 is a plate material joined perpendicularly to the lower end of the support shaft 11 and extends in a direction perpendicular to the pad pressing direction (vertical direction).

  The pad 3 presses the transfer surface 30 against the printing plate 2 coated with the printing liquid to transfer the print pattern onto the transfer surface 30, and presses the transfer surface 30 against the printing surface Y of the workpiece X to cover the printing pattern. A transfer body for pad printing to be transferred to the printing surface Y, and an elastically deformable elastic member made of, for example, butyl rubber, silicone rubber, nitrile rubber or the like. The pad 3 is a strip member (bar-shaped member) extending in a direction orthogonal to the pad pressing direction (vertical direction), and is a kamaboko-shaped rubber body bonded to the base plate 12. The opposite lower surface is a transfer surface 30 that temporarily holds the print pattern.

  As shown in FIGS. 2 to 4, the pad cleaning device 4 presses the transfer surface 30 of the pad 3 against the cleaning tape 15 to transfer the printing liquid remaining on the transfer surface 30 to the cleaning tape 15, thereby transferring the transfer surface 30. This is a device for removing the printing liquid remaining on the surface. The schematic configuration of the pad cleaning device 4 includes a feeding unit 40 that feeds the cleaning tape 15, a collecting unit 41 that collects the cleaning tape 15 that is fed from the feeding unit 40, and a space between the feeding unit 40 and the collecting unit 41. A backing portion 42 that contacts the back surface of the stretched cleaning tape 15 and a pressing member 43 that presses the cleaning tape 15 spanned between the feeding portion 40 and the collection portion 41 from the front surface side are provided. .

  The cleaning tape 15 described above is an adhesive tape having an adhesive surface 16 on the surface. The cleaning tape 15 is wound around a cylindrical core member 18, thereby forming a roll-shaped cleaning tape roll 17.

  The feeding unit 40 is a mechanism that sequentially rotates the cleaning tape roll 17 while holding the cleaning tape roll 17 and sequentially feeds the cleaning tape 15. As a schematic configuration, the feeding unit 40 has a rotating shaft 44 that pivotally supports the cleaning tape roll 17. And a biasing member (not shown) that biases the rotating shaft 44 toward the opposite side of the feeding rotation direction (the rotation direction in which the cleaning tape 15 is fed). The above-described rotating shaft 44 is urged by the urging member, whereby the cleaning tape 15 installed between the feeding unit 40 and the collecting unit 41 is pulled.

  The collection unit 41 is a mechanism for winding the cleaning tape 15 fed from the feeding unit 40. As a schematic configuration, the collection unit 41 has a rotary shaft 45 that pivotally supports the core member 19 around which the cleaning tape 15 is wound, and the rotary shaft 45. And a drive mechanism (not shown) for driving the shaft intermittently. When the rotary shaft 45 is rotated by the drive mechanism, the cleaning tape 15 is wound around the core material 19 and the cleaning tape 15 is pulled and the cleaning tape 15 is pulled out from the feeding portion 40 (cleaning tape roll 17). .

  The backing portion 42 is an underlay that comes into contact with the cleaning tape 15 from the back side (the back side of the adhesive surface 16), and is disposed between the feeding portion 40 and the collecting portion 41 described above. The cleaning tape 15 transferred between the feeding unit 40 and the collection unit 41 slides on the upper surface of the backing unit 42.

  The pressing member 43 is a round bar-shaped member that presses the cleaning tape 15 installed between the feeding portion 40 and the collecting portion 41 from the adhesive surface 16 side, and is installed so as to be rotatable about the shaft. The pressing member 43 is disposed on the upstream side (the right side in FIG. 2) in the transfer direction of the cleaning tape 15 from the pressing position where the pad 3 is pressed. Further, a virtual line extending in the tape width direction of the cleaning tape 15 along the adhesive surface 16 of the cleaning tape 15 on the backing portion 42 is defined as a reference line L, and the pressing member 43 is inclined with respect to the reference line L. It is extended. The reference line L extends along the adhesive surface 16 of the cleaning tape 15 on the backing portion 42 and is orthogonal to the longitudinal direction of the cleaning tape 15. In the reference line L. That is, the pressing member 43 extends along the upper surface of the backing portion 42 (the adhesive surface 16 of the cleaning tape 15) and is disposed obliquely with respect to the longitudinal direction of the cleaning tape 15 in plan view. .

  Next, the usage method of the pad printing apparatus 1 provided with the above pad cleaning apparatus 4 is demonstrated.

  First, as shown in FIG. 1, the printing plate 2 is set by fitting the printing plate 2 in the recess 70 of the printing platen 7. Further, the work X is placed on the work table 8 and placed at a predetermined position, and the work X is held by holding means (not shown) to fix the work X at the predetermined position.

  Next, as shown in FIG. 5, after the printing liquid is applied to the upper surface of the printing plate 2 by the printing liquid application means (not shown), the squeegee 6 is slid along the upper surface of the printing plate 2 by the squeegee moving means (not shown). Move. As a result, the printing liquid is filled in the grooves 20 of the printing plate 2 without any gaps, and excess printing liquid on the printing plate 2 is scraped off.

  Next, as shown in FIG. 6, the transfer surface 30 of the pad 3 is pressed against the upper surface of the printing plate 2 by the pad moving means 9. More specifically, in a state where the pad 3 is disposed vertically above the printing plate 2, the pad support portion 10 is lowered by the vertical movement mechanism 91, and the transfer surface 30 of the pad 3 supported by the pad support portion 10 is moved. Press against the upper surface of the stamp 2. As a result, the printing liquid in the groove 20 of the printing plate 2 adheres to the transfer surface 30 of the pad 3, and the print pattern is transferred to the transfer surface 30 of the pad 3.

  Next, as shown in FIG. 7, the pad 3 is moved to the position of the work X by the pad moving means 9, and the transfer surface 30 of the pad 3 is pressed against the printing surface Y of the work X. Specifically, first, the pad support portion 10 is raised by the vertical movement mechanism 91, and the pad 3 supported by the pad support portion 10 is pulled up. Subsequently, a drive mechanism (not shown) of the horizontal movement mechanism 90 is driven to cause the slider 93 to travel along the guide rail 92 and move the pad 3 to a position vertically above the workpiece X. Thereafter, the pad support portion 10 is lowered by the vertical movement mechanism 91, and the transfer surface 30 of the pad 3 supported by the pad support portion 10 is pressed against the printing surface Y of the workpiece X. As a result, the printing liquid held on the transfer surface 30 of the pad 3 adheres to the printing surface Y, and the printing pattern is printed on the printing surface Y.

  Next, the pad 3 is moved to the position of the pad cleaning device 4 by the pad moving means 9, and the printing liquid remaining on the transfer surface 30 of the pad 3 is removed by the pad cleaning device 4 to clean the transfer surface 30 of the pad 3. .

  Specifically, as shown in FIG. 8, first, the transfer surface 30 of the pad 3 is pressed against the adhesive surface 16 of the cleaning tape 15 where the backing portion 42 is applied (pressing step). Specifically, the pad support unit 10 is raised by the vertical movement mechanism 91 and the pad 3 supported by the pad support unit 10 is pulled up. Subsequently, a drive mechanism (not shown) of the horizontal movement mechanism 90 is driven to cause the slider 93 to travel along the guide rail 92 and move the pad 3 to a position vertically above the pad cleaning device 4. Thereafter, the pad support portion 10 is lowered by the vertical movement mechanism 91, and the transfer surface 30 of the pad 3 supported by the pad support portion 10 is placed on the cleaning tape 15 laid between the feeding portion 40 and the recovery portion 41. The pressing portion 42 is pressed against the adhesive surface 16 of the portion pressed from below. As a result, the printing liquid remaining on the transfer surface 30 of the pad 3 is transferred to the adhesive surface 16 of the cleaning tape 15, and the printing liquid is removed from the transfer surface 30 of the pad 3.

Next, as shown in FIG. 9, after the pad 3 is moved in the direction away from the backing portion 42 (upward), the pad 3 is temporarily stopped, and the cleaning tape 15 attached to the pad 3 is removed from the pad 3. Strip (peeling step). Specifically, the vertical support mechanism 91 raises the pad support portion 10 to a small width, and the pad 3 is pulled up and temporarily stopped. At this time, the adhesive surface 16 of the cleaning tape 15 is attached to the transfer surface 30 of the pad 3 and the cleaning tape 15 is lifted together with the pad 3. The transfer surface 30 is slowly and gently peeled off. At this time, since the cleaning tape 15 is pressed from the adhesive surface 16 side by the pressing member 43, the cleaning tape 15 is peeled off from the transfer surface 30 of the pad 3 immediately. Accordingly, the height position at which the pad 3 is temporarily stopped is set low, and the amount by which the cleaning tape 15 is pulled up can be kept small. Further, since the pressing member 43 described above extends obliquely with respect to the reference line L, as shown in FIG. 10, the cleaning tape 15 attached to the transfer surface 30 of the pad 3 is sequentially from one side in the width direction. It will be peeled off. Further, since the round bar-shaped pressing member 43 is provided so as to be rotatable about the shaft, the pressing member 43 is easily peeled off from the adhesive surface 16 and the cleaning tape 15 is prevented from sticking to the pressing member 43. Further, since the pressing member 43 described above is disposed on the upstream side in the transfer direction of the cleaning tape 15 from the pressing position of the pad 3, the pressing member 43 presses the cleaning tape 15 to which the printing liquid is not attached. The printing liquid does not adhere to the pressing member 43.
The height position at which the pad 3 is temporarily stopped is a height position at which the cleaning tape 15 attached to the transfer surface 30 of the pad 3 is gradually peeled off, and the transfer surface 30 of the pad 3 and the cleaning tape 15 are removed. It is appropriately set according to the adhesive force with the adhesive surface 16.

  Next, as shown in FIG. 9, the pad 3 is returned to the original position vertically above the printing plate 2. Specifically, the pad support portion 10 is raised by the vertical movement mechanism 91, and the pad 3 supported by the pad support portion 10 is further lifted from the temporary stationary position. Subsequently, a drive mechanism (not shown) of the horizontal movement mechanism 90 is driven to cause the slider 93 to travel along the guide rail 92 and move the pad 3 to a position vertically above the printing plate 2.

Further, the cleaning tape 15 is intermittently transferred from the feeding unit 40 side toward the collecting unit 41 side. More specifically, by driving a drive mechanism (not shown) of the collecting unit 41 and rotating the rotation shaft 45 of the collecting unit 41, the cleaning tape 15 is wound and the cleaning tape roll 17 of the feeding unit 40 is rotated. The cleaning tape 15 is fed out from the cleaning tape roll 17 while rotating the shaft. As a result, the portion of the cleaning tape 15 to which the printing liquid is attached is collected by the collecting unit 41, and the new portion is arranged on the backing unit 42.
Thus, the printing of the work X on the printing surface Y is completed.

  According to the pad cleaning device 4 and the pad printing device 1 described above, when the pad 3 is peeled off from the adhesive surface 16 of the cleaning tape 15, the amount by which the cleaning tape 15 is pulled up can be kept small, so that it collides with the backing portion 42. The momentum of the cleaning tape 15 can be suppressed and abnormal noise can be suppressed, and damage to the transfer surface 30 of the pad 3 can be suppressed and the life of the pad 3 can be extended.

  In particular, in the pad cleaning device 4 and the pad printing device 1 described above, the cleaning tape 15 is slowly peeled off from one side in the width direction, so that the cleaning tape 15 is grounded to the backing portion 42 slowly and gently. For this reason, the abnormal noise can be suppressed to a very low level, and the damage to the pad 3 is extremely reduced, so that the life of the pad 3 can be extended.

  Further, according to the cleaning method of the pad 3 by the pad cleaning device 4 described above, the pad 3 is temporarily stopped at a slightly raised position, and then the pad 3 is moved to a position above the printing plate 2. Even when the adhesive force of the 15 adhesive surfaces 16 is strong, the cleaning tape 15 is slowly and gently peeled off from the transfer surface 30 of the pad 3. As a result, abnormal noise can be reliably reduced, damage to the pad 3 is reliably reduced, and the life of the pad 3 can be reliably extended.

  Further, according to the pad cleaning device 4 and the pad printing device 1 described above, since the printing liquid does not adhere to the pressing member 43, for example, the transfer of the cleaning tape 15 is hindered by the printing liquid attached to the pressing member 43. Problems caused by the printing liquid adhering to the pressing member 43 can be prevented.

  Further, according to the pad cleaning device 4 and the pad printing device 1 described above, the pressing member 43 that presses the adhesive surface 16 of the cleaning tape 15 is easily peeled off from the adhesive surface 16, and the cleaning tape 15 is prevented from sticking to the pressing member 43. Therefore, the cleaning tape 15 can be smoothly transferred from the feeding unit 40 to the collecting unit 41.

The embodiments of the pad cleaning device, the pad printing device, and the pad cleaning method according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and may be appropriately selected without departing from the spirit of the present invention. It can be changed.
For example, in the embodiment described above, the pressing member 43 is disposed immediately above the backing portion 42. However, in the present invention, the pressing member 43 is disposed at a position away from the backing portion 42 in plan view. It may be.

  Further, in the above-described embodiment, the rotation shaft 44 of the feeding portion 40 is fed and rotated by a biasing member (not shown) in order to apply tension to the cleaning tape 15 installed between the feeding portion 40 and the collecting portion 41. The rotating shaft 45 of the collecting unit 41 is urged toward the opposite side of the direction, and the rotating shaft 45 of the collecting unit 41 is rotated by a driving mechanism (not shown). However, in the present invention, the rotating shaft 45 of the collecting unit 41 is not shown. A mechanism that is urged by the urging member and that rotates the rotating shaft 44 of the feeding portion 40 by a driving mechanism (not shown) may be used. It is also possible to provide a tension roller that pulls the cleaning tape 15 in place of the urging member that urges the rotating shaft 44.

  Further, in the above-described embodiment, the feeding unit 40 that feeds the cleaning tape 15 from the roll-shaped cleaning tape roll 17 is provided. However, in the present invention, the feeding unit that feeds the cleaning tape 15 that is not wound in a roll shape. It may be.

  In the above-described embodiment, the cleaning tape 15 fed from the feeding unit 40 is wound up by the collecting unit 41. However, the present invention is a collecting unit that collects the cleaning tape 15 without winding it. There may be. For example, a mechanism may be used in which the cleaning tape 15 fed from the feeding unit 40 is sandwiched between a driving roller and a nip roller, and the driving roller is driven to rotate, and the cleaning tape 15 is pulled out and collected.

  Further, in the above-described embodiment, the pad 3 is pressed against the adhesive surface 16 of the cleaning tape 15 as the pad 3 moves up and down. However, in the present invention, the cleaning tape 15 is moved up and down, the pad 3 and It is also possible to adopt a configuration in which the pad 3 is pressed against the adhesive surface 16 of the cleaning tape 15 by moving the cleaning tape 15 up and down. For example, it is possible to adopt a configuration in which the backing portion 42 is moved up and down while the feeding portion 40 and the collection portion 41 are fixed, and the adhesive surface 16 of the cleaning tape 15 is pressed against the pad 3.

  Further, in the above-described embodiment, the feeding unit 40 and the collection unit 41 are arranged side by side in the horizontal direction, the cleaning tape 15 is installed between them in a substantially horizontal direction, and the pad 3 is adhered to the cleaning tape 15. Although it is configured to be pressed against the surface 16 from above, in the present invention, the installation direction of the pad cleaning device 4 can be appropriately changed. For example, the feeding portion 40 and the collection portion 41 are arranged in parallel in the vertical direction, the cleaning tape 15 is installed between them in a substantially vertical direction, and the pad 3 is pressed against the adhesive surface 16 of the cleaning tape 15 from the side. It is also possible to adopt a configuration such as

  In the above-described embodiment, the pressing member 43 is disposed along the adhesive surface 16 of the cleaning tape 15 and is inclined with respect to the reference line L in plan view. As shown in FIG. 11, the pressing member 43 may be disposed obliquely with respect to the adhesive surface 16 of the cleaning tape 15. That is, the pressing member 43 may be inclined with respect to the reference line L in the longitudinal sectional view. In this case, it may be inclined with respect to the reference line L in a plan view, or the pressing member 43 may extend along the reference line L in a plan view. Furthermore, the present invention can be configured such that the pressing member 43 is not inclined with respect to the reference line L.

  Further, in the above-described embodiment, the pressing member 43 is disposed on the upstream side in the transfer direction of the cleaning tape 15 from the pressing position where the pad 3 is pressed. However, in the present invention, the cleaning tape 15 is positioned more than the pressing position. A pressing member may be disposed on the downstream side in the transfer direction. For example, the pressing members 43 may be disposed on the upstream side and the downstream side of the pressing position, and the transfer surface 30 of the pad 3 may be pressed against the portion of the cleaning tape 15 between the two pressing members 43. Is possible.

  Further, in the above-described embodiment, the round bar-shaped pressing member 43 capable of rotating the shaft is provided. However, in the present invention, a pressing member having another shape can be used, and the pressing member does not rotate on the axis. It may be fixed as follows. For example, a square bar-shaped pressing member or a flat plate-shaped pressing member may be used. Further, the pressing member 43 may be formed integrally with the backing portion 42.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

DESCRIPTION OF SYMBOLS 1 Pad printing apparatus 2 Printing plate 3 Pad 4 Pad cleaning apparatus 15 Cleaning tape 16 Adhesive surface 30 Transfer surface 40 Feeding part 41 Collecting part 42 Backing part 43 Holding member L Reference line X Workpiece (Printed object)
Y surface to be printed

Claims (6)

A feeding portion for feeding out a cleaning tape having an adhesive surface on a surface; a collecting portion for collecting the cleaning tape fed from the feeding portion; and the cleaning tape stretched between the feeding portion and the collecting portion. A backing portion that contacts the back surface,
In the pad cleaning device for removing the printing liquid remaining on the transfer surface by pressing the transfer surface of the pad printing pad against the adhesive surface of the portion of the cleaning tape to which the backing portion is applied,
A pad cleaning device, comprising: a pressing member that presses the cleaning tape spanned between the feeding portion and the recovery portion from the adhesive surface side. The pad cleaning apparatus according to claim 1,
The pressing member extends obliquely with respect to the reference line with a virtual line extending along the adhesive surface and perpendicular to the longitudinal direction of the cleaning tape as a reference line. Pad cleaning device. In the pad cleaning device according to claim 1 or 2,
The pad cleaning device, wherein the pressing member is disposed upstream in the transfer direction of the cleaning tape from a pressing position where the pad is pressed. In the pad cleaning device according to any one of claims 1 to 3,
The pressing member is a round bar-shaped member,
A pad cleaning device, wherein the pressing member is provided so as to be rotatable. The transfer surface at the tip of the pad is pressed onto the printing plate coated with the printing liquid to transfer the print pattern to the transfer surface, and the transfer surface is pressed against the printing surface of the substrate to be printed. In the pad printing apparatus for transferring and removing the printing liquid remaining on the transfer surface,
A pad printing apparatus comprising the pad cleaning apparatus according to claim 1. A feeding portion for feeding out a cleaning tape having an adhesive surface on a surface; a collecting portion for collecting the cleaning tape fed from the feeding portion; and the cleaning tape stretched between the feeding portion and the collecting portion. A pad cleaning method for removing printing liquid remaining on a transfer surface of a pad for pad printing by a pad cleaning device provided with a backing portion in contact with the back surface,
A pressing step of pressing the transfer surface of the pad against the adhesive surface of the portion of the cleaning tape to which the backing portion is applied;
A peeling step of temporarily stopping the pad after moving the pad in a direction away from the backing portion, and peeling the cleaning tape attached to the pad from the pad;
A pad cleaning method comprising:

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