JP6656971B2 - Pad printing machine - Google Patents

Description

  The present invention relates to a pad printing machine.

  As a pad printing machine, for example, those described in Patent Documents 1-3 are known. In a pad printing machine, a plate plate (also referred to as a printing plate) on which a concave printing pattern is formed reciprocates below an opening of an ink tank. In order to fill the concave print pattern with ink and to prevent ink from remaining around the print pattern, a ring blade that slides on the upper surface of the plate plate is provided around the opening of the ink tank. I have.

  Here, the plate plate and the ring blade are pressed against each other, so that the ink around the print pattern is reliably scraped off by the ring plate. In Patent Document 1, the ink tank is pressed downward by a pressure bar. In Patent Literature 3, the ink tank is pressed downward by a spring. In Patent Documents 1 and 2, the ring blade is made of ceramics or super steel.

JP-A-7-314642 JP-A-8-39773 JP-A-5-177815

  In order to press the plate plate and the ring blade against each other, a conventional pad printing machine employs a structure in which an ink tank is pressed downward. Therefore, the pad printing machine has become large. That is, the conventional pad printing machine has room for improvement in cost reduction and space saving (first problem).

  Also, in a pad printing machine, it is very important to reliably scrape ink around a printing pattern on a plate plate with a ring blade in order to transfer the printing pattern with high accuracy. However, since the ring blade is made of ceramics or super steel, it is a very hard material. For this reason, there is a possibility that a gap may occur between the plate plate and the ring blade. In order to prevent a gap from occurring, it was necessary to press the plate plate and the ring blade with a very strong force. Then, the plate and the ring blade are worn out early, and thus need to be replaced early (second problem).

  An object of the present invention is to provide a pad printer capable of solving any of the above problems.

A pad printing machine, an ink tank having an opening below, a tank mounting body integrally provided below the ink tank and forming a plate housing space below the opening, and the opening of the ink tank. A ring blade provided on the lower surface of the ink tank so as to surround the ink tank; and a print pattern formed on the upper surface, slidably provided in the plate accommodating space in a horizontal direction, and the print pattern is attached to a position of the opening and a pad attached. A plate plate provided so as to be able to reciprocate with the position, a biasing member provided on the tank mounting body, for biasing the plate plate upward, and pressing an upper surface of the plate plate against the ring blade; A transfer pad for applying ink present in the print pattern at a pad attachment position and transferring the ink to an object. Obtain.

According to the pad printing machine, the biasing member is provided on the tank mounting body, biases the plate plate upward, and presses the upper surface of the plate plate against the ring blade. Since the plate plate is smaller than the ink tank, the urging force of the urging member may be sufficiently smaller than the conventional force for urging the ink tank downward. Therefore, the size of the urging member can be reduced, and as a result, the size of the pad printing machine can be reduced. Further, by providing the urging member on the tank mounting body to urge the plate plate, the ink tank, the tank mounting body, the plate plate, and the urging member can be unitized. This also makes it possible to further reduce the size of the pad printing machine as a whole.

Here, in the pad printing machine, the ring blade, may be so that formed by polymeric materials. Polymer materials have lower hardness than ceramics and super steel. Therefore, in a state where the plate plate is pressed against the ring blade, the ring blade is deformed according to the surface shape of the plate plate. In other words, the ability to follow the surface shape of the plate plate by the polymer material ring blade is very good. Therefore, even if the surface of the plate plate has a minute distortion, a gap between the plate plate and the ring blade can be prevented by the high followability of the ring blade.

  In addition, the force with which the plate plate and the ring blade press against each other is sufficient to deform the ring blade so that it can continue to contact the plate plate. Therefore, a large force does not act on the ring blade and the plate plate. Therefore, an improvement in the life of the plate can be expected.

It is a partial sectional view of the pad printer of this embodiment. FIG. 2 is a diagram illustrating a process of attaching ink to a transfer pad in a printing process performed by the pad printer of FIG. 1. FIG. 2 is a diagram illustrating a step of transferring ink attached to a transfer pad to a target in a printing process performed by the pad printing machine in FIG. 1. It is sectional drawing of the tank unit which comprises a pad printing machine, and is IV-IV sectional drawing of FIG. FIG. 7 is a sectional view of the tank unit, and is a sectional view taken along line VV of FIG. 6. FIG. 6 is a sectional view of the tank unit, and is a sectional view taken along line VI-VI of FIG. 4. FIG. 7 is a sectional view of the tank unit, and is a sectional view taken along line VII-VII of FIG. 4. FIG. 3 is a bottom view of an ink tank constituting a tank unit. FIG. 4 is a plan view of a tank mounting body constituting the tank unit. It is a top view of the plate plate which comprises a tank unit. FIG. 4 is a diagram illustrating a state in which a ring blade mounted on an ink tank, an urging member mounted on a tank mounting body, an opening of the ink tank, and a printing pattern of a plate are superimposed when viewed from above.

(1. Configuration of the pad printing machine 1)
The configuration of the pad printing machine 1 will be described with reference to FIG. The pad printing machine 1 is, for example, a device that marks an end of an outer peripheral surface of a rubber hose. As shown in FIG. 1, the pad printing machine 1 includes a base 11, a frame 12, an elevating cylinder 13, a transfer pad 14, a slide cylinder 15, a locking claw 16, and a tank unit 17.

  The base 11 is a member that is disposed on a predetermined installation surface, holds the printing object W, and fixes the frame 12. Various materials such as wooden, metal, and resin can be applied to the base 11. The base 11 includes a pedestal 11a placed on the installation surface, an object holding part 11b fixed to the pedestal 11a to hold the object W, and a support 11c fixed to the pedestal 11a. The target object W is, for example, a rubber hose.

  The frame 12 is fixed to the support 11c and is made of metal. The frame 12 is formed in a rectangular parallelepiped shape, and includes an upper opening 12a into which the tank unit 17 can be inserted. The frame 12 houses the tank unit 17. Further, the frame 12 includes a first side opening 12b on the side thereof that allows the plate plate 40 (described later) constituting the tank unit 17 to protrude. Here, the first side opening 12 b, that is, the plate 40, is located above the upper surface of the object W held by the object holder 11 b of the base 11. Further, the frame 12 includes a second side opening 12c on the side opposite to the first side opening 12b, through which the horizontal rod 15a of the slide cylinder 15 can be inserted.

  The lifting cylinder 13 is provided on the frame 12 and includes a lifting rod 13a that moves in the vertical direction. The lifting cylinder 13 is, for example, an air cylinder, a hydraulic cylinder, or the like. The lifting cylinder 13 is provided on the side of the frame 12, that is, at a position facing the surface of the frame 12 where the first side opening 12b is formed. The elevating cylinder 13 is located above the marking position of the object W held by the object holding unit 11b.

  Further, the lower end of the lifting rod 13a of the lifting cylinder 13 is located at a position higher than the first side opening 12b (the retreat position shown in FIG. 1) and at a position lower than the first side opening 12b (transfer position shown in FIG. 3). To move between. That is, the lower end of the lifting rod 13a is movable between a position higher than the plate plate 40 and an upper surface of the object W positioned lower than the plate plate 40.

  The transfer pad 14 is detachably attached to the lower end of the lifting rod 13 a of the lifting cylinder 13. That is, the transfer pad 14 moves up and down. The transfer pad 14 is formed in a shape according to the print pattern. The transfer pad 14 is formed of a material having elasticity. For example, silicone rubber is applied to the transfer pad 14 in consideration of flexibility, durability, ink holding performance, ink transfer performance, and the like. The transfer pad 14 can be made of another material.

  The slide cylinder 15 (corresponding to a driving device) includes a horizontal rod 15a that is provided on the frame 12 and moves in the horizontal direction. The slide cylinder 15 is, for example, an air cylinder, a hydraulic cylinder, or the like. The slide cylinder 15 is a driving device that reciprocates the plate 40 in the horizontal direction. The slide cylinder 15 is provided on the side of the frame 12, that is, on the surface of the frame 12 where the second side opening 12c is formed. That is, the slide cylinder 15 and the lift cylinder 13 are located at positions sandwiching the frame 12. The horizontal rod 15 a of the slide cylinder 15 is inserted into the second side opening 12 c of the frame 12.

  The locking claw 16 is attached to the distal end of the horizontal rod 15a of the slide cylinder 15. The locking claw 16 uses a bolt in the present embodiment. That is, the locking claw 16 includes a shaft portion 16a attached to the horizontal rod 15a, and a head portion 16b having a larger diameter than the shaft portion 16a at the tip of the shaft portion 16a. The head 16b is locked in a horizontal direction with respect to a plate plate 40 described later. That is, as the horizontal rod 15a of the slide cylinder 15 moves in the horizontal direction, the locking claws 16 move the plate 40 in the horizontal direction.

  The tank unit 17 is detachably held inside the frame 12. The tank unit 17 has a plate plate 40 that stores ink therein and that allows the transfer pad 14 to hold ink of a predetermined print pattern so as to be horizontally movable. The tank unit 17 is replaced according to the color of the ink, the type of the ink, and the printing pattern. The tank unit 17 is insertable and removable from the upper opening 12a of the frame 12.

  The tank unit 17 includes an ink tank 20, a tank mount 30, a plate 40, a ring blade 50, and a biasing member 60.

  The ink tank 20 is made of metal and stores ink inside. The ink tank 20 has an opening 21 below and an inlet 22 above. Further, a sealing stopper 23 is attached to the inlet 22. The ink has a color corresponding to the purpose, and is made of a material corresponding to the object W and the purpose.

  The tank mount 30 is made of the same metal as the ink tank 20, and is integrally provided below the ink tank 20. The tank mounting body 30 forms a plate housing space 31 between the tank mounting body 30 and the lower surface of the ink tank 20. That is, the plate accommodation space 31 is located below the opening 21 of the ink tank 20.

  The plate plate 40 is made of metal, and has a concave print pattern 41 formed on the upper surface. The plate 40 is provided in the plate housing space 31 so as to be slidable in the horizontal direction. The plate 40 includes a locked concave portion 42 that is locked by the locking claw 16. Therefore, the plate plate 40 reciprocates in the horizontal direction with the movement of the horizontal rod 15a of the slide cylinder 15. The print pattern 41 can reciprocate between the position of the opening 21 and the pad attachment position (the position below the transfer pad 14).

  The ring blade 50 is formed of a polymer material. For example, the ring blade 50 is formed of a plastic resin or an elastomer. In particular, the ring blade 50 is preferably made of a plastic resin rather than an elastomer. For example, polytetrafluoroethylene (PTFE) is suitable for the ring blade 50. Although the durability is inferior, silicone rubber or the like can be used for the ring blade 50.

  The ring blade 50 is provided on the lower surface of the ink tank 20 so as to surround the opening 21 of the ink tank 20. The ring blade 50 slightly protrudes below the lower surface of the ink tank 20. Therefore, the ring blade 50 contacts the upper surface of the plate 40. That is, when the plate plate 40 reciprocates in the horizontal direction, the ink adhering to the periphery of the print pattern 41 on the upper surface of the plate plate 40 is scraped off.

  The biasing member 60 is provided on the upper surface of the tank mounting body 30. As the urging member 60, a spring member such as a coil spring, a disc spring, and a plate spring is suitably used. The urging member 60 urges the plate 40 upward. Then, the urging member 60 presses the upper surface of the plate plate 40 against the ring blade 50. That is, when the urging member 60 urges the plate plate 40 upward, the ring blade 50 maintains a state of being in contact with the upper surface of the plate plate 40 over the entire circumference.

(2. Operation of pad printing machine 1)
Next, the operation of the pad printing machine 1 will be described with reference to FIGS. FIG. 1 shows an initial state of the pad printing machine 1. As shown in FIG. 1, the object W is held in an object holding unit 11 b of the base 11.

  The elevating cylinder 13 positions the elevating rod 13a at the retracted position at the upper end. The slide cylinder 15 is in a state where the horizontal rod 15a is most accommodated. As a result, the plate 40 is completely housed in the plate housing space 31 formed by the ink tank 20 and the tank mount 30. In this state, the print pattern 41 of the plate 40 is located below the opening 21 of the ink tank 20. Therefore, the print pattern 41 is filled with ink that has dropped from the opening 21 of the ink tank 20 due to gravity.

  Next, as shown in FIG. 2, the slide cylinder 15 extends the horizontal rod 15a. Then, a part of the plate 40 jumps out of the plate housing space 31 to the side of the frame 12 through the first side opening 12b. At this time, the printing pattern 41 is located below the transfer pad 14 located at the pad attachment position shown in FIG.

  Next, as shown in FIG. 2, the lifting cylinder 13 moves the lifting rod 13a downward. Then, the lower surface of the transfer pad 14 contacts the upper surface of the plate 40. Since the print pattern 41 is located at the pad attachment position, the ink present in the print pattern 41 is attached to the lower surface of the transfer pad 14.

  Next, as shown in FIG. 3, the lifting cylinder 13 moves the lifting rod 13a to the upper retreat position. At this time, the ink is attached to the transfer pad 14. Subsequently, the slide cylinder 15 retracts the horizontal rod 15a. That is, the plate plate 40 is stored in the plate storage space 31 again.

  Subsequently, the elevating cylinder 13 moves the elevating rod 13a to a lower transfer position. Then, the lower surface of the transfer pad 14 is pressed against the surface of the target W, and the ink attached to the lower surface of the transfer pad 14 is transferred to the target W. Thereafter, the elevating cylinder 13 moves the elevating rod 13a to the upper retreat position again. At this time, no ink has adhered to the transfer pad 14. Then, the above operation is repeated.

  When changing the type of ink or changing the plate 40, the tank unit 17 is replaced. Further, the transfer pad 14 is also appropriately changed according to the shape of the print pattern 41.

(3. Detailed configuration of components of tank unit 17)
The detailed configuration of the components 20-60 of the tank unit 17 will be described with reference to FIGS.

  The outer shape of the ink tank 20 is formed in a rectangular parallelepiped shape as shown in FIG. As shown in FIG. 8, the opening 21 formed on the lower surface of the ink tank 20 is rectangular (rectangular). The opening 21 is shifted to the side on the rectangular lower surface of the ink tank 20. That is, the opening 21 is closer to the first side opening 12b side of the frame 12, as shown in FIG. Here, the opening 21 is formed with an opening larger than the maximum circumscribed shape of all of the plurality of types of print patterns 41 in order to correspond to the shapes of the plurality of types of print patterns 41 which are appropriately changed.

  As shown in FIGS. 4 to 6, an annular groove 24 is formed on the lower surface of the ink tank 20 around the opening 21. As shown in FIG. 8, the annular groove 24 is formed in a rectangular shape with curved corners. The annular groove 24 is formed so as to be substantially equidistant from the edge of the opening 21.

  Further, as shown in FIGS. 4 and 8, a straight groove 25 is formed on the lower surface of the ink tank 20 from the side edge opposite to the opening 21 toward the opening 21. As shown in FIG. 7, the straight groove 25 is an arc-shaped concave groove. The straight groove 25 is an area that allows the passage of the locking claw 16.

  Next, as shown in FIG. 6, the tank mounting body 30 is formed in a U-shape having a recess at the upper center. The recess is the plate accommodation space 31. The U-shaped upper end of the tank attachment 30 contacts the lower surface of the ink tank 20. The tank attachment 30 is integrally attached to the ink tank 20 by, for example, a bolt (not shown).

  Further, as shown in FIGS. 5 and 6, four spring housing recesses 32 are formed on the upper surface of the tank mounting body 30. The spring receiving recess 32 has a bottom. When the urging member 60 is a coil spring, the spring accommodating recess 32 has a cylindrical inner peripheral surface as shown in FIG. The four spring accommodating recesses 32 are formed at positions corresponding to rectangular corners. The four spring accommodating recesses 32 are located at positions corresponding to the annular grooves 24 of the ink tank 20. That is, the four spring accommodating recesses 32 are closer to the first side opening 12 b of the frame 12.

  Further, as shown in FIGS. 4 and 9, a notch 33 is formed on the side surface of the tank mounting body 30 opposite to the four spring accommodating recesses 32. The notch 33 is formed through the center of the side surface in the vertical direction. That is, the notch 33 is formed from the lower surface to the plate accommodation space 31. The notch 33 is formed in a size that allows the notch 33 to pass vertically.

  Further, as shown in FIGS. 4 and 9, a straight groove 34 of the tank mounting body 30 is formed on the upper surface of the tank mounting body 30 from the notch 33 toward the side edge on the spring accommodating recess 32 side. The straight groove 34 faces the straight groove 25 of the ink tank 20, as shown in FIG. The straight groove 34 is a symmetrical shape of the straight groove 25 of the ink tank 20, that is, an arc-shaped concave groove. The straight groove 34 of the tank attachment 30 is also an area that allows the passage of the locking claw 16.

  Next, as shown in FIG. 10, the printing pattern 41 is formed on the plate plate 40 on the side where the opening 21 of the ink tank 20 is formed. FIG. 10 shows a rectangular print pattern 41. Further, a locked concave portion 42 is formed on the side of the plate plate 40 opposite to the print pattern 41. The locked concave portion 42 is formed in such a shape that the opening on the side (the right side in FIG. 10) is narrow and the opening on the rear side (the left side in FIG. 10) is wide. That is, the locking claw 16 is disposed in a wide area on the back side of the locked concave portion 42, and the locking claw 16 is locked to a flange forming a narrow opening portion of the locked concave portion 42. Further, since the opening of the locked concave portion 42 is narrow, the end face of the horizontal rod 15a of the slide cylinder 15 contacts the periphery of the opening of the locked concave portion 42. That is, since the locking claw 16 and the horizontal rod 15a are locked in the locked concave portion 42, the plate 40 can be reciprocated by the horizontal rod 15a.

  The ring blade 50 has a circular cross section. The ring blade 50 is mounted in the annular groove 24 of the ink tank 20. The biasing member 60 is housed in the four spring housing recesses 32.

(4. Relative position of ring blade 50 and biasing member 60)
Next, the relative position between the ring blade 50 and the urging member 60 will be described with reference to FIG. The ring blade 50 is mounted in a substantially rectangular annular groove 24 formed in the ink tank 20. On the other hand, the biasing member 60 is housed in the spring housing recess 32 formed in the tank mounting body 30. At this time, the urging member 60 is located immediately below the ring blade 50. That is, the biasing position of the biasing member 60 with respect to the lower surface of the plate plate 40 is located immediately below the ring blade 50. In particular, the center of the circular cross section of the ring blade 50 intersects with the coil center of the biasing member 60 which is a coil spring.

  More specifically, the two have the following relative positional relationship. Since the ring blade 50 is mounted in a substantially rectangular shape, the ring blade 50 has linear portions on both sides in the horizontal movement direction of the plate plate 40 around the opening 21 of the ink tank 20. Two urging members 60 are located in each of these linear portions. Further, the two urging members 60 are located near both ends of the linear portion.

(5. Mounting method of tank unit 17)
Next, a method of attaching the tank unit 17 to the frame 12 will be described with reference to FIG. The tank unit 17 is inserted from the upper opening 12a of the frame 12. At this time, the lifting cylinder 13, the transfer pad 14, the slide cylinder 15, and the locking claw 16 are already attached to the frame 12. That is, the locking claw 16 is in a state of protruding into the frame 12.

  Here, a notch 33 is formed in the tank attachment body 30 that constitutes the tank unit 17. The locking claw 16 is located at a position corresponding to the notch 33. Therefore, when the tank unit 17 moves downward inside the frame 12, the locking claw 16 passes through the notch 33.

  Thereafter, when the tank unit 17 moves further downward inside the frame 12, the locking claws 16 enter the locked concave portions 42. Accordingly, the locking claw 16 is locked with respect to the locked concave portion 42 in the horizontal movement direction of the plate plate 40. In this state, the mounting of the tank unit 17 is completed. That is, the tank unit 17 is very easily mounted on the frame 12 simply by inserting it from the upper opening 12a of the frame 12.

(6. Effects of the embodiment)
The above-described pad printing machine 1 includes an ink tank 20 having an opening below, a tank mounting body 30 provided integrally below the ink tank 20 and forming a plate housing space 31 below the opening 21, A ring blade 50 is provided on the lower surface of the ink tank 20 so as to surround the opening 21 of the tank 20, and a print pattern 41 is formed on the upper surface. A plate plate 40 that is reciprocally movable between the position of the opening 21 and the pad attachment position, a transfer pad 14 that attaches ink present in the print pattern 41 at the pad attachment position, and transfers the ink to the object W; Is provided.

  Further, the pad printing machine 1 includes an urging member 60 provided on the tank mounting body 30 to urge the plate plate 40 upward and press the upper surface of the plate plate 40 against the ring blade 50. The urging member 60 is provided on the tank mounting body 30 and urges the plate plate 40 upward to press the upper surface of the plate plate 40 against the ring blade 50.

  Since the plate 40 is smaller than the ink tank 20, the urging force of the urging member 60 is sufficient even if it is smaller than the conventional urging force of the ink tank 20 downward. Therefore, the size of the urging member 60 can be reduced, and as a result, the size of the pad printing machine 1 can be reduced. Further, by providing the urging member 60 on the tank mounting body 30 to urge the plate plate 40, the ink tank 20, the tank mounting body 30, the plate 40, and the urging member 60 can be unitized. Becomes This also makes it possible to further reduce the size of the pad printing machine 1 as a whole.

  The ring blade 50 is formed of a polymer material, and the urging member 60 is in contact with the upper surface of the plate 40 in a state where the ring blade 50 is deformed. Here, the polymer material has lower hardness than ceramics and super steel. Therefore, in a state where the plate plate 40 is pressed against the ring blade 50, the ring blade 50 is deformed according to the surface shape of the plate plate 40. In other words, the followability of the ring blade 50 made of a polymer material to the surface shape of the plate 40 is very good. Therefore, even if the surface of the plate plate 40 has a slight distortion, a gap between the plate plate 40 and the ring blade 50 can be prevented by the high followability of the ring blade 50.

  Further, the force of pressing the plate plate 40 and the ring blade 50 against each other is enough to deform the ring blade 50 so that the plate blade 40 can keep in contact with the plate plate 40. Therefore, a large force does not act on the ring blade 50 and the plate plate 40 mutually. Therefore, an improvement in the life of the plate plate 40 can be expected.

  Further, the ring blade 50 is preferably formed of a plastic resin. Thus, the ring blade 50 can reliably scrape ink around the print pattern 41. Further, the ring blade 50 has high durability.

  Further, the biasing member 60 is a spring member held by the tank mounting body 30. For example, it is a coil spring, a disc spring, or a leaf spring. This makes it possible to easily attach the urging member 60 to the tank attachment 30. As a result, the structure of the tank unit 17 can be simplified, and the tank unit 17 can be easily unitized.

  The biasing position of the biasing member 60 with respect to the lower surface of the plate plate 40 is located immediately below the ring blade 50. Thereby, the contact between the ring blade 50 and the plate 40 can be ensured. In particular, the center of the circular cross section of the ring blade 50 intersects with the coil center of the biasing member 60 which is a coil spring. Thereby, the contact state between the ring blade 50 and the plate 40 is more reliably ensured.

  Further, the tank mounting body 30 has a notch 33 that opens downward and opens on the opposite side to the transfer pad 14 and reaches the plate housing space 31. The plate 40 is provided on the opposite side to the transfer pad 14 and includes a locked concave portion 42 corresponding to the notch 33 in a state where the print pattern 41 is located at the position of the opening 21.

  The pad printing machine 1 includes an upper opening 12a into which a tank unit 17 including an ink tank 20 and a tank mounting body 30 can be inserted, and is provided in the frame 12 that accommodates the tank unit 17 and the frame 12. A locking claw 16 provided at a position corresponding to the notch 33 and locked in the moving direction of the plate plate 40 with respect to the locked concave portion 42, and a slide cylinder 15 for moving the locking claw 16 in the horizontal direction. Prepare. Due to the formation of the notch 33, the tank unit 17 can be mounted on the frame 12 very easily.

1: pad printing machine, 11: base, 12: frame, 12a: upper opening, 13: elevating cylinder, 13a: elevating rod, 14: transfer pad, 15: slide cylinder, 15a: horizontal rod, 16: locking Claw, 17: tank unit, 20: ink tank, 21: opening, 24: annular groove, 25: straight groove, 30: tank mounting body, 31: plate housing space, 32: spring housing recess, 33: notch, 34: straight groove, 40: plate plate, 41: printing pattern, 42: locked concave part, 50: ring blade, 60: urging member, W: object

Claims (7)

An ink tank having an opening below,
A tank mounting body integrally provided at a lower portion of the ink tank and forming a plate housing space below the opening;
A ring blade formed in a circular cross section and provided on a lower surface of the ink tank so as to surround the opening of the ink tank;
A plate plate on which a print pattern is formed, the plate accommodation space is provided so as to be slidable in the horizontal direction, and the print pattern is provided so as to be able to reciprocate between the position of the opening and the pad attachment position,
A plurality of biasing members provided on the tank mounting body, for urging the plate plate upward, pressing an upper surface of the plate plate against the ring blade, and respectively disposed at a plurality of positions directly below the ring blade. When,
Attach the ink present in the print pattern at the pad attachment position, a transfer pad to transfer the ink to the target,
Equipped with a,
Each of the biasing member, the biasing center of the ring blade circular section of the center and the biasing member Ru provided so as to cross the pad printing machine.   The urging member is a coil spring,
  2. The pad printing machine according to claim 1, wherein each of the urging members is provided such that a center of a circular section of the ring blade and a coil center of the urging member intersect.   The ring blade has, on both sides of the horizontal movement direction of the plate plate, a linear portion extending in a direction orthogonal to the movement direction of the plate plate,
  A plurality of the urging members are provided on one linear portion of the ring blade,
  The pad printing machine according to claim 1, wherein a plurality of the urging members are provided in the other linear portion of the ring blade. The ring blade is formed of a polymer material,
The pad printing machine according to any one of claims 1 to 3 , wherein the urging member contacts the upper surface of the plate plate in a state where the ring blade is deformed. The pad printing machine according to claim 4 , wherein the ring blade is formed of a plastic resin. The tank mounting body has a notch that opens downward and opens on the opposite side to the transfer pad, and extends to the plate housing space,
The plate plate is located on the side opposite to the transfer pad, and includes a locked recess corresponding to the notch in a state where the printing pattern is located at the position of the opening.
The pad printing machine,
A frame that includes an upper opening into which a tank unit constituted by the ink tank and the tank mounting body can be inserted, and that accommodates the tank unit;
A locking claw provided on the frame, provided at a position corresponding to the notch, and locked in the moving direction of the plate plate with respect to the locked recess;
A driving device for moving the locking claw in a horizontal direction,
The pad printing machine according to any one of claims 1 to 5, comprising: An ink tank having an opening below,
A plate accommodating space is formed integrally below the ink tank, the plate accommodating space is formed below the opening, and a notch that opens downward and opens on the opposite side to the transfer pad and reaches the plate accommodating space is provided. Tank mounting body,
A ring blade provided on the lower surface of the ink tank so as to surround the opening of the ink tank;
A print pattern is formed on the upper surface, the plate accommodation space is provided so as to be slidable in the horizontal direction, the print pattern is provided so as to be able to reciprocate between the position of the opening and the pad attachment position, and is opposite to the transfer pad. a plate plates Ru with a locked recesses corresponding to the cut in a state in which the printing pattern is located on the side is positioned at the position of the opening,
An urging member provided on the tank mounting body, urging the plate plate upward, and pressing an upper surface of the plate plate against the ring blade,
Attach the ink present in the print pattern at the pad attachment position, a transfer pad to transfer the ink to the target,
A frame that includes an upper opening into which a tank unit constituted by the ink tank and the tank mounting body can be inserted, and that accommodates the tank unit;
A locking claw provided on the frame, provided at a position corresponding to the notch, and locked in the moving direction of the plate plate with respect to the locked recess;
A driving device for moving the locking claw in a horizontal direction,
A pad printing machine comprising:

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