CN109996525B - Conveyance device and printing device - Google Patents

Conveyance device and printing device Download PDF

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Publication number
CN109996525B
CN109996525B CN201780071553.8A CN201780071553A CN109996525B CN 109996525 B CN109996525 B CN 109996525B CN 201780071553 A CN201780071553 A CN 201780071553A CN 109996525 B CN109996525 B CN 109996525B
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China
Prior art keywords
conveying
conveyor
circulating
unit
hole
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CN201780071553.8A
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Chinese (zh)
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CN109996525A (en
Inventor
蒲隆
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Screen Holdings Co Ltd
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Screen Holdings Co Ltd
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Publication of CN109996525A publication Critical patent/CN109996525A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
    • A61J3/06—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of pills, lozenges or dragees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/58—Belts or like endless load-carriers with means for holding or retaining the loads in fixed position, e.g. magnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/84—Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements

Abstract

The conveying device (30) is provided with a1 st conveying part (31) and a2 nd conveying part (32), wherein the 1 st conveying part (31) and the 2 nd conveying part (32) are respectively provided with a1 st circulating part (61) and a2 nd circulating part (71) which are provided with a plurality of through holes (610, 720) arranged in a grid shape. The 1 st circulation unit (61) has a cylindrical delivery unit (61a) in which a1 st suction region (611), a blow region (612), and a1 st blocking region (613) are adjacent in this order from the upstream side. The 2 nd circulation part (71) has a2 nd blocking area (711) and a cylindrical receiving part (71a) which is adjacent to the 2 nd adsorption area (712) from the position (P1) opposite to the air blowing area (612) to the downstream side in sequence from the upstream side and opposite to the sending part (61 a). Thus, the granular objects held by one conveying unit are not affected by the air pressure inside the other conveying unit before and after the transfer section. Therefore, the positional deviation of the particulate matter can be suppressed.

Description

Conveyance device and printing device
Technical Field
The present invention relates to a conveying device for conveying granular materials such as tablets or tablet-shaped confectionery, and a printing device for printing on the surface of the granular materials conveyed by the conveying device.
Background
Characters or codes for identifying products are printed on the surface of tablets as pharmaceutical products. In addition, there are cases where a mark or illustration is printed on the tablet-like confectionery. Conventionally, there is known a technique of printing on the surface of a granular material such as a tablet or a tablet-like confectionery using an ink jet type printing apparatus. Such a printing apparatus is described in patent document 1, for example.
In the printing apparatus described in patent document 1, ink is discharged from an ink jet head to a tablet conveyed by a conveying mechanism (conveying conveyor), and a printing process is performed on the tablet. Such a printing apparatus includes a supply unit for supplying the granular material to the conveyance mechanism. In the printing apparatus described in patent document 1, a printing process is performed on tablets conveyed by a plurality of conveying units in a roll shape and a belt shape.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication (JP 2015-223323)
Disclosure of Invention
Problems to be solved by the invention
In the case where the particulate matter is conveyed by a plurality of conveying sections, when the particulate matter is delivered from an upstream conveying section to a downstream conveying section, the position of the particulate matter is likely to be shifted. If the position of the particulate matter is shifted, the printing position may be shifted in the downstream printing process. Therefore, defective products may occur. In order to reduce the occurrence of defective products, it is preferable that the position of the particulate matter is prevented from being shifted when the particulate matter is transferred between the conveying sections in the conveying apparatus having a plurality of conveying sections.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a technique for suppressing occurrence of positional deviation of particulate matter at the time of transfer of the particulate matter between conveying sections in a conveying device having a plurality of conveying sections.
Means for solving the problems
In order to solve the above problem, the present invention according to claim 1 is a conveying device for conveying granular objects, comprising: a1 st conveying part having a1 st circulating part in a circulating belt shape; and a2 nd conveying part arranged at the downstream side of the 1 st conveying part and provided with a2 nd circulating part in a circulating belt shape; the 1 st circulation unit and the 2 nd circulation unit each have a plurality of through holes arranged in a grid pattern with an interval in a conveying direction and a width direction, the 1 st circulation unit has a cylindrical sheet-like delivery unit, the 2 nd circulation unit has a cylindrical sheet-like receiving unit facing the delivery unit via a gap, and the delivery unit is arranged adjacent to each other in the conveying direction in order from an upstream side to a downstream side: a1 st suction region in which a suction force acts on the through hole from the inside of the 1 st circulation portion; a blow-off region in which gas is blown off from the inside of the 1 st circulating unit into the through hole; and a1 st blocking area for blocking the action of the air pressure on the through hole; the receiving unit is provided with: a2 nd blocking area for blocking the action of the air pressure on the through hole; and a2 nd adsorption region which is continued from a position opposite to the air blowing region toward a downstream side and in which a suction force is applied to the through hole from the inside of the 2 nd circulation portion.
The 2 nd invention of the present application is the conveying device of the 1 st invention, wherein the 2 nd conveying part further includes a pair of cylindrical pulleys, and the 2 nd circulating part is a conveying belt annularly stretched between the pair of pulleys and circulates around the pair of pulleys.
The 3 rd invention of the present application is the conveying device of the 2 nd invention, wherein the 2 nd conveying part further includes: a cover portion that covers a side surface in the width direction of the space surrounded by the 2 nd circulation portion; a1 st shielding member for blocking communication between an internal space surrounded by the 2 nd circulating unit and the cover unit and the through hole; and a suction mechanism for generating a negative pressure lower than atmospheric pressure in the internal space; the pulleys each have: a plurality of circular plate portions arranged at intervals in the width direction and having a cylindrical outer peripheral surface; and a connecting portion that connects the plurality of holding portions in the width direction; the through hole of the 2 nd circulating part is arranged at a position not overlapping with the holding part in the width direction, the 1 st shielding member has a plurality of 1 st shielding parts, and the plurality of 1 st shielding parts are arranged between the holding parts adjacent along the width direction at a position on the upstream side of the 2 nd adsorption region and overlapping with the 2 nd shielding region.
The 4 th aspect of the present invention is the conveying device according to the 1 st to 3 rd aspects, wherein the 1 st circulating unit circulates in a cylindrical shape.
The 5 th aspect of the present application is the conveying device of the 4 th aspect, wherein the 1 st conveying member further includes: a cylindrical portion disposed inside the 1 st circulating portion; a suction mechanism that generates a negative pressure below atmospheric pressure; and a pressurizing mechanism that generates a positive pressure higher than the atmospheric pressure; the 1 st circulation portion circulates in a cylindrical shape around the cylindrical portion, and the cylindrical portion includes: a cylindrical outer peripheral surface; a recess portion which is disposed inside the 1 st suction region and is recessed inward from the outer peripheral surface; a suction passage portion connecting a space in the recess portion to the suction mechanism; an air outlet disposed in the air blowing region and provided on the outer peripheral surface; and a pressurizing passage portion connecting the air outlet and the pressurizing mechanism; the outer peripheral surface of the cylindrical portion blocks communication between the through hole and the suction passage portion and the pressure passage portion at a position in the conveyance direction overlapping with the 1 st blocking area.
The 6 th aspect of the present invention is the conveying device according to any one of the 1 st to 3 rd aspects, wherein the 1 st conveying part further includes a pair of cylindrical pulleys, and the 1 st circulating part is a conveying belt annularly stretched between the pair of pulleys and circulates around the pair of pulleys.
The 7 th aspect of the present application is the conveying device of the 6 th aspect, wherein the 1 st conveying member further includes: a cover portion that covers a side surface in the width direction of the space surrounded by the 1 st circulating portion; a2 nd shielding member having a shielding surface for blocking communication between an internal space surrounded by the 1 st circulating unit and the cover unit and the through hole; a suction mechanism for generating a negative pressure lower than atmospheric pressure in the internal space; a pressurizing mechanism that generates a positive pressure higher than the atmospheric pressure; and an air outlet disposed in the air blowing region and connecting the through hole to the pressurizing mechanism; the pulleys each have: a plurality of circular plate portions arranged at intervals in the width direction and having a cylindrical outer peripheral surface; and a connecting portion that connects the plurality of holding portions in the width direction; the through hole of the 1 st circulating unit is disposed at a position not overlapping with the holding unit, and the 2 nd shielding member has a plurality of 2 nd shielding units disposed between the holding units adjacent in the width direction.
The 8 th aspect of the present invention is the conveying device of the 1 st aspect, wherein the granular material is a tablet.
The 9 th aspect of the present application is a printing apparatus including: the conveying device according to any one of claims 1 to 8; and a printing unit that discharges ink droplets onto the surface of the granular object conveyed by the conveying device.
Effects of the invention
According to the invention 1 to the invention 9 of the present application, it is possible to suppress the occurrence of positional deviation of the particulate matter at the time of transfer of the particulate matter between the conveying sections.
Drawings
Fig. 1 is a diagram showing a configuration of a printing apparatus.
Fig. 2 is a perspective view of the vicinity of the conveying roller.
Fig. 3 is a bottom view of the printing portion.
Fig. 4 is a block diagram showing connections between the control unit and each unit in the printing apparatus.
Fig. 5 is a schematic diagram showing a structure in the vicinity of the conveyance mechanism.
Fig. 6 is a cross-sectional view showing a structure in the vicinity of the connection portion.
Fig. 7 is a perspective view of the 1 st pulley, the 1 st shielding member, and the 2 nd shielding member.
Fig. 8 is a perspective view of the 1 st shield member.
Fig. 9 is a schematic view showing a positional relationship of each part of the conveyance mechanism before use of the printing apparatus.
Fig. 10 is a flowchart showing a flow of position adjustment of each part of the conveyance mechanism at the start of use of the printing apparatus.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a direction in which a plurality of granular objects are conveyed is referred to as a "conveying direction", a direction perpendicular and horizontal to the conveying direction is referred to as a "width direction", and a direction perpendicular to the conveying direction and the width direction is referred to as a "height direction".
<1 > construction of printing apparatus >
Fig. 1 is a diagram showing a configuration of a printing apparatus 1 according to an embodiment of the present invention. The printing apparatus 1 is an apparatus that prints an image such as a product name, a product code, a company name, and a brand mark (logo mark) on the surface of each tablet 9 while conveying a plurality of tablets 9 as a medicine. Tablet 9 may be an uncoated tablet (bare tablet) or a coated tablet such as a film-coated tablet (FC tablet). Tablet 9 may also be a capsule containing hard and soft capsules. The granular material to be conveyed in the present invention is not limited to tablets, and may be confectionery in the form of tablets such as boiled water candies.
As shown in fig. 1, the printing apparatus 1 of the present embodiment includes a supply mechanism 20, a conveyance mechanism 30, a printing unit 40, an inspection mechanism 50, and a control unit 10.
The supply mechanism 20 includes a hopper 21, a linear feeder 22, a rotary feeder 23, a supply feeder 24, and a guide 25 (see fig. 2). The supply mechanism 20 is a mechanism for delivering the tablets 9 loaded into the apparatus to the conveying mechanism 30.
The hopper 21 is a loading section for receiving a plurality of tablets 9 in the apparatus at a time. The hopper 21 is disposed at the uppermost portion of the housing 100 of the printing apparatus 1. The hopper 21 has an opening 211 located on the upper surface of the housing 100 and a funnel-shaped inclined surface 212 gradually narrowing downward. The plurality of tablets 9 fed toward the opening 211 flow into the straight feeder 22 along the inclined surface 212.
The straight feeder 22, the rotary feeder 23, and the supply feeder 24 are mechanisms for conveying the plurality of tablets 9 loaded into the hopper 21 to the conveying mechanism 30. The linear feeder 22 has a vibration groove 221 in the form of a flat plate. The plurality of tablets 9 fed from the hopper 21 to the vibration chute 221 are conveyed toward the rotary feeder 23 by the vibration of the vibration chute 221.
The rotary feeder 23 includes a disk-shaped rotary table 231. The plurality of tablets 9 dropped from the vibration groove 221 to the upper surface of the rotary table 231 are gathered toward the vicinity of the outer peripheral portion of the rotary table 231 by the centrifugal force generated by the rotation of the rotary table 231.
The supply feeder 24 is a supply unit that supplies the tablets 9 one at a time to a holding unit 610 described later. Fig. 2 is a perspective view including a part of the supply feeder 24, the transfer roller 31, and a part of the upper transfer conveyor 32. As shown in fig. 1 and 2, the supply feeder 24 extends vertically downward from the outer peripheral portion of the rotary table 231 to a later-described transport drum 31 of the transport mechanism 30.
As shown in fig. 2, a plurality of (8 in the example of fig. 2) hollow portions 241 extending in the vertical direction are provided inside the supply feeder 24. The lower end of the hollow portion 241 is disposed to face the outer surface of a drum circulating portion 61 of the conveying drum 31, which will be described later. The plurality of tablets 9 conveyed toward the outer periphery of the rotary table 231 are supplied to any one of the plurality of hollow portions 241, and drop vertically downward in the hollow portion 241. In this way, the plurality of tablets 9 are distributed and supplied to the plurality of hollow portions 241, and thereby are arranged in a plurality of conveying lines. Then, the plurality of tablets 9 of each conveying line are sequentially supplied to the conveying drum 31 from the preceding tablet. Thereby, the tablets 9 are fed one at a time to the holding portion 610 provided on the outer surface of the drum circulation portion 61.
The guide portion 25 is a mechanism for adjusting the posture of the tablet 9 supplied from the supply feeder 24 to a later-described holding portion 610 of the conveying drum 31. The guide portion 25 is composed of a plate spring member 251 and a plurality of (8 in the example of fig. 2) resin portions 252. The guide portion 25 includes a fixed portion 25a fixed to the feeder 24 and a plurality of contact portions 25b deformable in a direction (height direction) perpendicular to the outer peripheral surface of the drum circulation portion 61.
The plate spring member 251 is a plate-shaped member formed of a metal such as SUS (stainless steel). In addition, the plate spring member 251 may be formed of a material other than metal. The plate spring member 251 has a base end portion constituting the fixing portion 25a, and a plurality of (8 in the example of fig. 2) tip end portions branched from the base end portion. The resin portion 252 is fixed to the lower surface of the tip end portion of the plate spring member 251. The contact portion 25b is constituted by the distal end portion of the plate spring member 251 and the resin portion 252. Further, as long as the guide portion 25 is an elastic member deformable in the height direction, another member may be used instead of the plate spring member 251 and the resin portion 252.
When the tablet 9 passes below the guide portion 25, the lower surface of the contact portion 25b of the guide portion 25 contacts the tablet 9 while deforming upward and downward. Thereby, the posture of the tablet 9 is adjusted to a stable conveyance posture. In the present embodiment, the guide 25 has 8 contact portions 25b, the number of which is the same as the number of the conveyance lines. Therefore, the contact portion 25b that contacts the tablet 9 held by one holding portion 610 does not contact the tablet 9 held by the other holding portion 610. Therefore, the action of contacting the contact portion 25b of one tablet 9 does not affect the action of contacting the contact portion 25b of the other tablet 9. Therefore, the posture of the tablet 9 is adjusted by the contact portion 25b without being affected by the posture of the other tablet 9.
The transfer mechanism 30 includes a transfer roller 31, an upper transfer conveyor 32, a lower transfer conveyor 33, and a carry-out conveyor 34.
The conveying drum 31 is a conveying section that delivers and receives the plurality of tablets 9 from the feeder 24 to the upper conveying conveyor 32. As shown in fig. 2, the conveying roller 31 is provided with a plurality of holding portions 610 arranged at substantially equal intervals in the conveying direction and the width direction. The holding portion 610 is a recess provided on the outer surface of the conveying roller 31. The plurality of holding portions 610 of the conveying roller 31 are arranged along the conveying direction at the widthwise positions corresponding to the plurality of conveying lines, respectively. The bottom of the holding portion 610 is provided with a through hole 600. The through hole 600 is connected to a suction mechanism 64 described later. When the suction mechanism 64 is operated, negative pressure lower than atmospheric pressure is generated in each of the plurality of holding portions 610 located on the downstream side of the guide portion 25 via the through hole 600. The holding portion 610 holds the tablets 9 fed from the feeder 24 by suction one by the negative pressure.
Then, the positive pressure higher than the atmospheric pressure is applied to the holding portion 610 that moves on the conveying drum 31 to a position facing the upper conveying conveyor 32, and the adsorption of the tablets 9 is released. The conveying drum 31 rotates while adsorbing and holding the plurality of tablets 9 supplied from the supply feeder 24 as described above, and transfers the tablets 9 to the upper conveying conveyor 32. When the tablet 9 is transferred from the conveying roller 31 to the upper conveying conveyor 32, the surface of the tablet 9 sucked and held by the conveying roller 31 is different from the surface of the tablet 9 sucked and held by the upper conveying conveyor 32. Therefore, the front and back surfaces of the tablets 9 are reversed while being held by the conveying roller 31 and while being held by the upper conveying conveyor 32.
The upper conveyor 32 is a conveyor belt-like conveyor section having a conveyor belt 71 and a pair of pulleys 72. The conveyor belt 71 is looped and stretched between a pair of pulleys 72. The tablet 9 conveyed by the upper conveyor 32 is subjected to a printing process by a1 st printing unit 41 of the printing unit 40, which will be described later. The upper conveying conveyor 32 delivers the plurality of tablets 9 to and from the lower conveying conveyor 33.
The upper conveying conveyor 32 is provided with a plurality of holding portions 710 arranged at substantially equal intervals in the conveying direction and the width direction. The holding portion 710 is a recess provided on the outer surface of the conveying belt 71. The intervals in the conveying direction and the width direction of the plurality of holders 710 of the upper conveyor 32 are equal to the intervals in the conveying direction and the width direction of the plurality of holders 610 of the conveying drum 31. The bottom of the holding portion 710 is provided with a through hole 700. The through hole 700 is connected to a suction mechanism 75 described later. When the suction mechanism 75 is operated, a negative pressure lower than the atmospheric pressure is generated in each of the plurality of holding portions 710 located in the predetermined region through the through hole 700. The holding portion 710 holds the tablets 9 by suction one by the negative pressure.
The positive pressure higher than the atmospheric pressure is applied to the holding portion 710 which moves on the upper conveying conveyor 32 to a position facing the lower conveying conveyor 33, and the adsorption of the tablets 9 is released. Thereby, the upper conveying conveyor 32 delivers the tablets 9 to the lower conveying conveyor 33. When the tablets 9 are transferred from the upper conveying conveyor 32 to the lower conveying conveyor 33, the surface of the tablets 9 sucked and held by the upper conveying conveyor 32 is different from the surface of the tablets 9 sucked and held by the lower conveying conveyor 33. Therefore, the front and back surfaces of the tablets 9 are reversed while being held by the upper conveying conveyor 32 and while being held by the lower conveying conveyor 33.
The lower conveying conveyor 33 has substantially the same configuration as the upper conveying conveyor 32. The lower conveying conveyor 33 is a belt-like conveying member having a conveying belt 71 and a pair of pulleys 72. The tablet 9 conveyed by the lower conveyor 33 is subjected to a printing process by a2 nd printing unit 42 of the printing unit 40, which will be described later.
Below the lower conveying conveyor 33, a chute (shoot)341 connecting the lower conveying conveyor 33 and the carrying-out conveyor 34 is disposed. The positive pressure higher than the atmospheric pressure is applied to the holding portion 710 which moves on the lower conveying conveyor 33 to a position facing the chute 341, and the adsorption of the tablets 9 is released. Thereby, the lower conveying conveyor 33 drops the tablets 9 into the chute 341. Thereby, the tablets 9 are transferred from the lower conveying conveyor 33 to the discharge conveyor 34 via the chute 341.
The carry-out conveyor 34 is a conveyor section that carries out the plurality of printed tablets 9 to the outside of the housing 100 of the printing apparatus 1. The upstream end of the carry-out conveyor 34 is located below the chute 341. The downstream end of the carry-out conveyor 34 is located outside the housing 100. The downstream end of the carry-out conveyor 34 is connected to a packaging device that packages, for example, the tablet 9 after the printing process. The carry-out conveyor 34 is, for example, a conveyor belt type conveying mechanism. The plurality of tablets 9 transferred from the lower conveying conveyor 33 to the carrying-out conveyor 34 are carried out to the outside of the housing 100 by the carrying-out conveyor 34.
The conveying device for conveying the tablets 9 in this manner is composed of the supply mechanism 20 and the conveying mechanism 30. The detailed configuration of each part of the conveying mechanism 30 will be described later.
The printing unit 40 includes a1 st printing unit 41 and a2 nd printing unit 42.
The 1 st printing unit 41 is a printing processing unit for printing an image on the surface of the tablet 9 side. As shown in fig. 1, the 1 st printing portion 41 has a head unit 410, and the head unit 410 has 4 heads 400. Fig. 3 is a bottom view of 1 showerhead 400. In fig. 3, each part of the conveyor belt 71 is indicated by a two-dot chain line. In fig. 3, the plurality of tablets 9 held by the conveying belt 71 are shown by broken lines.
The 4 heads 400 included in the head unit 410 are each an ink jet type head that ejects ink droplets toward the surface of the tablet 9 conveyed by the conveying mechanism 30 and performs a printing process. The 4 heads 400 eject ink droplets of different colors (for example, cyan, magenta, yellow, and black colors). A multicolor image is recorded on the surface of tablet 9 by superposition of monochromatic images formed in these respective colors. The ink discharged from each head 400 is edible ink produced using a material approved by the food sanitation act.
As shown in fig. 3 in an enlarged manner, a plurality of nozzles 401 capable of ejecting ink droplets are provided on the lower surface of the head 400. In the present embodiment, a plurality of nozzles 401 are two-dimensionally arrayed in the conveyance direction and the width direction on the lower surface of the head 400. The nozzles 401 are arranged with a shift in position in the width direction. In this manner, when the plurality of nozzles 401 are two-dimensionally arranged, the positions of the nozzles 401 in the width direction can be brought close to each other. However, the plurality of nozzles 401 may be arranged in a row along the width direction.
The discharge method of the ink droplets from the nozzles 401 is, for example, a so-called piezoelectric (piezo) method in which ink in the nozzles 401 is pressurized and discharged by applying a voltage to a piezo element (piezo electric element) to deform the piezo element. The ink droplet discharge method may be a so-called thermal (thermal) method in which ink in the nozzle 401 is heated and expanded by energizing a heater to discharge ink droplets.
The 2 nd printing unit 42 is a processing unit for printing an image on the other surface of the tablet 9. The configuration of the 2 nd printing portion 42 is the same as that of the 1 st printing portion 41, and therefore, the description thereof is omitted.
As shown in fig. 1, the inspection mechanism 50 includes a1 st appearance inspection camera 51, a2 nd appearance inspection camera 52, a1 st printing inspection camera 53, a3 rd appearance inspection camera 54, a2 nd printing inspection camera 55, and a defective product collection unit 56.
The 1 st appearance inspection camera 51 is a camera that photographs the other surface of the tablet 9 conveyed by the conveying drum 31. The 2 nd appearance inspection camera 52 is a camera that photographs the surface of the tablet 9 conveyed by the upper conveyor 32 on the upstream side of the 1 st printing unit 41. The captured images obtained by the 1 st appearance inspection camera 51 and the 2 nd appearance inspection camera 52 are input to the control unit 10. The control unit 10 detects the presence or absence of the tablet 9, the presence or absence of a shape defect of each tablet 9, the orientation of each tablet 9, and the like in each holding unit 610, 710 based on the obtained captured image.
The 1 st printing inspection camera 53 is a camera that photographs the surface of the tablet 9 conveyed by the upper conveyor 32 on the downstream side of the 1 st printing unit 41. The captured image obtained by the 1 st printing inspection camera 53 is input to the control unit 10. The control unit 10 detects the presence or absence of a failure in the printing process performed by the 1 st printing unit 41 based on the captured image.
The 3 rd visual inspection camera 54 is a camera that photographs the surface of the other side of the tablet 9 conveyed by the lower conveying conveyor 33 on the upstream side of the 2 nd printing unit 42. The captured image obtained by the 3 rd visual inspection camera 54 is input to the control unit 10. The control unit 10 detects the presence or absence of the tablet 9, the presence or absence of a shape defect of each tablet 9, the orientation of each tablet 9, and the like in each holding unit 710 of the lower conveyor 33 based on the obtained captured image.
The 2 nd printing inspection camera 55 is a camera that photographs the surface of the other side of the tablet 9 conveyed by the lower conveying conveyor 33 on the downstream side of the 2 nd printing unit 42. The captured image obtained by the 2 nd printing inspection camera 55 is input to the control unit 10. The control unit 10 detects the presence or absence of a failure in the printing process performed by the 2 nd printing unit 42 based on the captured image.
The defective product collection unit 56 collects the tablets 9 determined to have a defective shape and the tablets 9 determined to have a defective printing from the images captured by the 5 cameras 51 to 55. The defective product collection unit 56 includes a pressurizing mechanism (not shown) and a collection tank 561. The holding part 710 holding the tablet 9 for which the failure is detected is blown with a gas that has been locally pressurized by the pressurizing mechanism from the inside of the lower conveying conveyor 33, thereby releasing the adsorption of the tablet 9. Thereby, the tablet 9 in which the failure is detected is collected in the collection box 561.
The control unit 10 is a device for controlling the operation of each unit in the printing apparatus 1. Fig. 4 is a block diagram showing the connection between the control unit 10 and each unit in the printing apparatus 1. As schematically shown in fig. 1, the control Unit 10 is constituted by a computer having an arithmetic Processing Unit 101 such as a Central Processing Unit (CPU), a Memory 102 such as a Random Access Memory (RAM), and a storage Unit 103 such as a hard disk drive. The storage unit 103 stores therein a computer program P or data D for executing a printing process.
As shown in fig. 4, the control unit 10 is communicably connected to the straight feeder 22, the rotary feeder 23, the transport drum 31 (including a motor, a suction mechanism, and a pressurizing mechanism), the upper transport conveyor 32 (including a motor, a suction mechanism, and a pressurizing mechanism), the lower transport conveyor 33 (including a motor, a suction mechanism, and a pressurizing mechanism), the carry-out conveyor 34, the heads 400 of the 1 st printing unit 41 and the 2 nd printing unit 42, the 1 st appearance inspection camera 51, the 2 nd appearance inspection camera 52, the 1 st printing inspection camera 53, the 3 rd appearance inspection camera 54, the 2 nd printing inspection camera 55, and the defective product collection unit 56, respectively.
The control unit 10 controls the operations of the above-described respective units by temporarily reading out the computer program P or the data D stored in the storage unit 103 to the memory 102 and performing an arithmetic process by the arithmetic processing unit 101 based on the computer program P. Thereby, the printing process for the plurality of tablets 9 is performed.
<2 > construction of each conveying section
Next, the detailed configuration of the 3 conveying sections of the conveying roller 31, the upper conveying conveyor 32, and the lower conveying conveyor 33 will be described with reference to fig. 5 and 6. Fig. 5 is a schematic diagram showing the configuration of the conveyance mechanism 30. Fig. 6 is a cross-sectional view showing the configuration of the vicinity of each of the transfer units 301, 302, and 303 of the conveying mechanism 30.
As shown in fig. 2, 5, and 6, the conveying drum 31 includes a circulating belt-shaped drum circulating unit 61, a cylindrical unit 62 disposed inside the drum circulating unit 61, a drum cover unit 63 covering lateral sides of the drum circulating unit 61 and the cylindrical unit 62 in the width direction, a suction mechanism 64, and a pressurizing mechanism 65.
The drum circulation unit 61 is a cylindrical member made of resin. The drum circulation portion 61 is rotated in the direction of the arrow in fig. 1, 2, 5, and 6 around a rotation shaft extending in the width direction by power obtained from a motor, not shown.
The drum circulation portion 61 has a substantially cylindrical outer peripheral surface. As shown in fig. 2, a plurality of holding portions 610 arranged at substantially equal intervals in the conveying direction and the width direction are provided on the outer peripheral surface of the drum circulating portion 61. The plurality of holding portions 610 are arranged in a grid pattern on the outer peripheral surface of the conveying drum 31 at positions corresponding to the width direction of the feeder 24.
The holding portions 610 are recesses provided on the outer surface of the drum circulation portion 61, respectively. The bottom of the holding portion 610 is provided with a through hole 600. That is, the drum circulation unit 61 has a plurality of through holes 600 arranged in a grid pattern with intervals in the conveying direction and the width direction.
The drum circulation unit 61 has a drum suction area 611, a drum blowing area 612, and a drum blocking area 613 corresponding to the position in the conveyance direction. In the drum suction region 611, a suction force acts on the through-hole 600 from the inside of the drum circulation portion 61. In the drum blowing region 612, gas is blown from the inside of the drum circulation portion 61 to the through holes 600. In the drum blocking area 613, the effect of the air pressure from the inside of the drum circulation portion 61 on the through-hole 600 is blocked.
The drum suction area 611 is disposed downstream of the supply feeder 24 and the guide unit 25. That is, the drum suction area 611 is disposed downstream of the 1 st delivery portion 301 where the tablet 9 is delivered from the feeder 24 to the conveying drum 31. Thus, the tablet 9 supplied from the supply feeder 24 and adjusted in posture by the guide 25 is sucked and held in the holding portion 610 in the drum suction region 611.
Here, as shown in fig. 5, a cylindrical surface portion of the drum circulating portion 61 facing the upper conveying conveyor 32 through a gap is referred to as a drum feeding portion 61 a. As shown in fig. 6, the drum blowing area 612 is disposed at a position closest to the upper conveyor 32 in the drum feeding unit 61 a. The drum feeding portion 61a includes at least a downstream end of the drum suction area 611, a drum blowing area 612, and an upstream end of the drum cutoff area 613. In the drum feeding unit 61a, a drum suction area 611, a drum blowing area 612, and a drum blocking area 613 are arranged adjacent to each other in the conveying direction in this order from the upstream side toward the downstream side.
The cylindrical portion 62 is a member disposed inside the drum circulation portion 61. The cylindrical portion 62 is fixed to the housing 100 of the printing apparatus 1. The cylindrical portion 62 has a cylindrical outer peripheral surface 621, a recess 622, a suction passage portion 623, a plurality of suction ports 624, a pressurizing passage portion 625, and a plurality of blow-out ports 626.
The outer circumferential surface 621 faces the cylindrical inner circumferential surface of the drum circulating portion 61 through a slight gap. The recess 622 is recessed radially inward from the outer circumferential surface 621. The recess 622 is provided only in a part of the conveying direction. The range of the concave portion 622 in the width direction includes all the conveying lines arranged along the width direction. The range of the concave portion 622 in the conveyance direction includes a plurality of rows of the holding portion 610. In the present embodiment, as shown in fig. 6, the concave portions 622 are provided so as to include the holding portions 610 in about 8 rows.
The suction passage portion 623 extends in the rotational axis direction in the cylindrical portion 62. The end of the suction passage portion 623 on one side in the rotational axis direction (i.e., the width direction) is covered with the drum cover portion 63. Alternatively, the end portion on the suction passage portion 623 side does not reach the end portion on the cylindrical portion 62 side. The other end of the suction passage 623 is connected to the suction mechanism 64.
The suction port 624 is disposed inside the recess 622, and connects the space inside the recess 622 to the suction passage portion 623. That is, the suction passage portion 623 and the suction port 624 connect the space in the recess 622 to the suction mechanism 64. In the present embodiment, the suction ports 624 are provided at 7 locations in the width direction at 4 locations in the conveyance direction, respectively, and 28 in total are arranged. The number of the suction ports 624 or the arrangement thereof is not limited thereto. When the suction mechanism 64 is driven, a negative pressure lower than the atmospheric pressure is generated in the recess 622 through the suction passage portion 623 and the suction port 624. The negative pressure causes the tablet 9 held by the holding portion 610 disposed at a position overlapping the recess 622 to be sucked into the through hole 600.
Thus, the drum circulation unit 61 is a drum suction region 611 in a conveying direction region radially overlapping the recess 622 of the cylindrical portion 62.
The pressure passage portion 625 extends in the rotation axis direction in the cylinder portion 62. The end of the pressurizing passage 625 on one side in the rotation axis direction is covered with the roller cover 63. Alternatively, the end portion on the pressure passage 625 side does not reach the end portion on the cylindrical portion 62 side. The other end of the pressurizing passage 625 is connected to the pressurizing mechanism 65.
The air outlet 626 is provided on the outer circumferential surface 621 on the downstream side of the recess 622. Further, the air outlet 626 is provided in the vicinity of the downstream side end of the recess 622. The air outlet 626 is disposed at a position corresponding to the conveyance line of the tablets 9. That is, the air outlet 626 is disposed at a position that coincides with the through hole 600 of the drum circulation portion 61 in the width direction. Therefore, in the present embodiment, 8 air outlets 626 are arranged in the same number as the number of the conveyance lines.
The pressurizing passage 625 connects the air outlet 626 and the pressurizing mechanism 65. Therefore, when the pressurizing mechanism 65 is driven, the gas is blown out from the blow-out port 626 to the outside through the pressurizing passage 625. The pressurizing mechanism 65 is driven at a timing when the drum circulation portion 61 is rotated and disposed at a position where the through hole 600 and the blow-out port 626 overlap, and a positive pressure higher than the atmospheric pressure acts on the holding portion 610 at a predetermined transport direction position. Thereby, the gas is blown to the tablet 9 held by the holding portion 610 through the through-hole 600, and the adsorption of the tablet 9 is released.
Thus, a conveying direction area of the drum circulation portion 61 overlapping the blow-out port 626 in the radial direction becomes the drum blowing area 612.
In the present embodiment, the drum circulation portion 61 and the cylindrical portion 62 are disposed adjacent to each other in the radial direction, but the present invention is not limited to this. A cylindrical intermediate member that rotates together with the drum circulation unit 61 may be attached between the drum circulation unit 61 and the cylindrical portion 62. However, in this case, the intermediate member is provided with a through hole for communicating the through hole 600 with the inside of the intermediate member.
The upper conveyor 32 includes a conveyor belt 71, a pair of pulleys 72, a frame 73, a pair of side covers 74, a suction mechanism 75, a1 st shielding member 76, a2 nd shielding member 77, and a pressing mechanism 78.
As described above, the conveyor belt 71 is looped and stretched between the pair of pulleys 72. The conveyor belt 71 is rotated between pulleys 72 by a drive mechanism not shown. The pulley 72 is a substantially cylindrical member fixed to the housing 100 of the printing apparatus 1. Therefore, the portion of the conveyor belt 71 that contacts the pulley 72 is cylindrical. The conveyor belt 71 is rotated between pulleys 72 by a drive mechanism not shown.
As shown in fig. 2 and 6, a plurality of holding portions 710 arranged at substantially equal intervals in the conveying direction and the width direction are provided on the outer surface of the conveying belt 71. The holding portions 710 are recesses provided on the outer surface of the conveying belt 71. The bottom of the holding portion 710 is provided with a through hole 700. The conveyor belt 71 includes a plurality of holders 710 and through holes 700 arranged in a grid pattern at intervals in the conveying direction and the width direction.
Here, as shown in fig. 5, the pulley 72 that is closer to the conveying roller 31 and the lower conveying conveyor 33 out of the pair of pulleys 72 of the upper conveying conveyor 32 is referred to as a1 st pulley 721. The other pulley 72 (see fig. 1) is referred to as a2 nd pulley 722. A cylindrical portion of the conveying belt 71 that contacts the 1 st pulley 721 is referred to as a1 st pulley contact portion 701. A cylindrical portion of the conveying belt 71 that contacts the 2 nd pulley 722 is referred to as a2 nd pulley contact portion 702 (see fig. 1).
The conveyor belt 71 is formed in a planar shape between the pulleys 72. Between the pulleys 72, the inner circumferential surface of the conveying belt 71 is supported by a frame 73. The frame 73 of the present embodiment supports the end of the conveyor belt 71 in the width direction between the pulleys 72. Here, 2 flat portions of the conveyor belt 71 disposed between the 1 st pulley contact portion 701 and the 2 nd pulley contact portion 702 are referred to as a1 st flat portion 703 and a2 nd flat portion 704. The 1 st plane portion 703 is located downstream of the 1 st sheave contact portion 701 and upstream of the 2 nd sheave contact portion 702, and is bridged over the upper portion of the sheave 72. The 2 nd plane portion 704 is located downstream of the 2 nd sheave contact portion 702 and upstream of the 1 st sheave contact portion 701, and is bridged over the lower portion of the sheave 72.
The conveyor belt 71 has an upper blocking area 711, a suction area 712, a blowing area 713, and a lower blocking area 714 corresponding to the position in the conveying direction. In the upper blocking area 711 and the lower blocking area 714, the action of the air pressure from the inside of the conveyor 71 on the through hole 700 is blocked. In the suction area 712, a suction force acts on the through-hole 700 from the inside of the conveyance belt 71. In the blow-off region 713, gas is blown from the inside of the conveyor belt 71 into the through-holes 700.
The 1 st pulley 721 of the upper conveying conveyor 32 is disposed below the conveying roller 31 and above one of the pulleys 72 of the lower conveying conveyor 33. Thus, the 1 st pulley contact portion 701 is disposed so that the upper portion thereof is close to the conveying roller 31 and the lower portion thereof is close to the lower conveying conveyor 33. Here, as shown in fig. 5, a cylindrical portion facing the conveying drum 31 through a gap in the 1 st pulley contact portion 701 is referred to as a conveyor receiving portion 71 a. A cylindrical surface portion of the 1 st pulley contact portion 701 disposed at the lower portion thereof and facing the lower conveying conveyor 33 via a gap is referred to as a conveyor feeding portion 71 b.
As shown in fig. 6, a position of the conveyor receiver 71a closest to the conveying drum 31, that is, a position facing the drum air blowing region 612 is referred to as a tablet receiving position P1. The upper blocking area 711 is disposed upstream of the tablet receiving position P1. The adsorption area 712 continues from the tablet receiving position P1 to the downstream side. In this way, the upper blocking area 711 and the suction area 712 are arranged adjacent to each other in the conveyance direction in the conveyor receiving portion 71a in the order from the upstream side to the downstream side.
The suction region 712 extends downstream from the tablet receiving position P1 to the 1 st plane portion 703, the entirety of the 2 nd pulley contact portion 702 and the 2 nd plane portion 704, and the lower portion of the 1 st pulley contact portion 701. Therefore, the tablet 9 received from the conveying drum 31 at the tablet receiving position P1 of the conveyor receiving portion 71a is conveyed to the conveyor sending portion 71b by the 1 st plane portion 703, the 2 nd pulley contact portion 702, and the 2 nd plane portion 704.
An air blow region 713 is disposed in the conveyor feeding unit 71b at a position closest to the lower conveyor 33. The conveyor feeding section 71b includes at least a downstream end of the suction region 712, an air blowing region 713, and an upstream end of the lower shielding region 714. In the conveyor feeding unit 71b, an adsorption region 712, an air blowing region 713, and a lower blocking region 714 are arranged adjacent to each other in the conveyance direction in this order from the upstream side toward the downstream side.
Here, fig. 7 is a perspective view of the 1 st pulley 721, the 1 st shielding member 76, and the 2 nd shielding member 77. Fig. 8 is a perspective view of the 1 st shielding member 76. Since the 1 st pulley 721 and the 2 nd pulley 722 have the same shape, only the 1 st pulley 721 will be described below. As shown in fig. 6 and 7, the pulley 72 includes a connecting portion 723 extending in a columnar shape along the central axis and a plurality of disc portions 724 extending in a disc shape with the central axis as the center. The outer end surface of the circular plate portion 724 contacts the inner circumferential surface of the conveying belt 71. The circular plate portions 724 are arranged at respective widthwise positions that do not overlap the through-holes 700 of the conveyor belt 71. Thus, the space between the inside of the holding portion 710 and the disk portion 724 communicates with each other through the through hole 700.
The side covers 74 cover both ends of the pulley 72 and the conveyor belt 71 in the width direction. The side cover 74 on the other side in the width direction is provided with a vent hole 741 (see fig. 5) connecting the internal space 70 surrounded by the conveyor belt 71 and the side cover 74 and the suction mechanism 75. Thus, when the suction mechanism 75 is driven, a negative pressure lower than the atmospheric pressure is generated in the internal space 70 through the vent hole 741. Therefore, negative pressure is also generated in the space between the circular plate portions 724 of the pulley 72 disposed in the internal space 70. When the through-hole 700 communicates with the internal space 70, the tablet 9 held by the holding portion 710 is sucked to the through-hole 700 by the negative pressure.
The 1 st shielding member 76 is a member for shielding the through hole 700 by contacting the inner circumferential surface of the conveyance belt 71. The 1 st shielding member 76 is disposed in the vicinity of the 1 st pulley 721. As shown in fig. 6, 7 and 8, the 1 st shielding member 76 includes a plurality of 1 st shielding portions 761 and 1 st fixing portions 762. The 1 st shielding portions 761 are respectively disposed between the circular plate portions 724 of the 1 st pulley 721. The 1 st shielding portion 761 has a1 st shielding surface 760 which is an arc-shaped end surface. The outer end surfaces of the plurality of circular plate portions 724 and the 1 st shielding surface 760 of the plurality of 1 st shielding portions 761 form a curved surface along the inner surface of the conveyor belt 71. As shown in fig. 6, the 1 st fixing portion 762 is fixed to the frame 73 so as to extend from the 1 st shielding portion 761 along the 1 st plane portion 703 of the conveyor belt 71.
At the position in the conveyance direction where the 1 st shielding surface 760 is arranged, the communication between the through hole 700 and the internal space 70 is blocked by the 1 st shielding portion 761 of the 1 st shielding member 76. Thereby, at the conveyance direction position, the effect of the air pressure on the through hole 700 is blocked. The conveyance belt 71 has an upper shielding area 711 at a conveyance direction position radially overlapping the 1 st shielding surface 760. In the region adjacent to the downstream side of the upper shielding region 711, the through hole 700 is not shielded by the 1 st shielding surface 760, and therefore the through hole 700 communicates with the internal space 70 which becomes the negative pressure. Therefore, a region adjacent to the downstream side of the upper blocking region 711 becomes the suction region 712.
The 2 nd shielding member 77 is a member for shielding the through hole 700 by contacting the inner circumferential surface of the conveyor belt 71. The 2 nd shielding member 77 is also a member for constituting the pressurizing passage 774 for applying a high positive pressure to the through hole 700.
The 2 nd shielding member 77 is disposed in the vicinity of the 1 st pulley 721. As shown in fig. 6 and 7, the 2 nd shielding member 77 includes a plurality of 2 nd shielding portions 771 and a2 nd fixing portion 772. The 2 nd shielding portions 771 are respectively disposed between the circular plate portions 724 of the 1 st pulley 721. The 2 nd shielding portion 771 has a2 nd shielding surface 770 which is an arc-shaped end surface. The outer end surfaces of the plurality of disc portions 724 and the 2 nd shielding surface 770 of the plurality of 2 nd shielding portions 771 form a curved surface along the inner surface of the conveyor belt 71. As shown in fig. 6, the 2 nd fixing portion 772 extends from the 2 nd shielding portion 771 along the 2 nd plane portion 704 of the conveyor belt 71 and is fixed to the frame 73.
The 2 nd shielding member 77 includes an air outlet 773 disposed in the vicinity of the lower end portion of the 2 nd shielding surface 770, and a pressure passage portion 774 extending from the air outlet 773 into the 2 nd shielding member 77. The blowout port 773 is provided in the vicinity of the upstream end of the 2 nd shielding surface 770. The blowout port 773 is disposed at a position corresponding to the conveyance line of the conveyance belt 71. That is, the blowout port 773 is disposed at a position that coincides with the through hole 700 of the conveyance belt 71 in the width direction. Therefore, in the present embodiment, 8 blow-out ports 773 are arranged in the same number as the number of the conveyance lines.
The pressurizing passage 774 extends from the blow-out port 773 to an end of the 2 nd fixing portion 772. The end of the pressurizing passage 774 opposite to the blow-out port 773 is connected to the pressurizing mechanism 78. That is, the pressurizing passage 774 connects the blow-out port 773 and the pressurizing mechanism 78. Therefore, when the pressurizing mechanism 78 is driven, the gas is blown out from the blow-out port 773 to the outside through the pressurizing passage 774. The pressurizing mechanism 78 is driven at a timing when the conveying belt 71 is rotated and disposed at a position where the through hole 700 and the blow-out port 773 overlap, and a positive pressure higher than the atmospheric pressure is applied to the holding portion 710 at a predetermined conveying direction position. Thereby, the gas is blown to the tablet 9 held by the holding portion 710 through the through-hole 700, and the adsorption of the tablet 9 is released.
The conveyance direction position in which the blow-out port 773 is disposed in the conveyance direction region in which the 2 nd shielding surface 770 is disposed becomes the blow-out region 713 in which the gas is blown out from the inside of the conveyance belt 71 into the through hole 700. In the area on the downstream side of the air outlet 773 in the conveyance direction area where the 2 nd shielding surface 770 is arranged, the communication between the through hole 700 and the internal space 70 is blocked by the 2 nd shielding portion 771 of the 2 nd shielding member 77. Thereby, at the conveyance direction position, the effect of the air pressure on the through hole 700 is blocked. Therefore, the conveying belt 71 is a lower blocking area 714 at a conveying direction position radially overlapping the 2 nd blocking surface 770 on the downstream side of the blowout port 773. In the region adjacent to the upstream side of the air blowing region 713, the through hole 700 is not shielded by the 2 nd shielding surface 770, and therefore the through hole 700 communicates with the internal space 70 which becomes the negative pressure. Therefore, the region adjacent to the upstream side of the lower blocking region 714 becomes the suction region 712.
The lower conveying conveyor 33 has substantially the same configuration as the upper conveying conveyor 32. Therefore, a detailed description of the lower conveying conveyor 33 is omitted. Further, the air blow region 713 of the conveyor sending-out portion 71b of the upper conveying conveyor 32 is disposed to face the tablet receiving position P2 near the upstream end of the suction region 712 of the conveyor receiving portion 71a of the lower conveying conveyor 33.
With the above configuration, the 2 nd delivery portion 302 that delivers and receives the tablet 9 is constituted by the roller delivery portion 61a of the conveying roller 31 and the conveyor receiving portion 71a of the upper conveying conveyor 32. In the 2 nd delivery portion 302, the conveying roller 31 constitutes a "1 st conveying portion", the roller circulation portion 61 constitutes a "1 st circulation portion", the roller discharge portion 61a constitutes a "discharge portion", the upper conveying conveyor 32 constitutes a "2 nd conveying portion", the conveying belt 71 of the upper conveying conveyor 32 constitutes a "2 nd circulation portion", and the conveyor receiver 71a of the upper conveying conveyor 32 constitutes a "receiver portion". In the transport drum 31, the drum suction area 611 constitutes a "1 st suction area", the drum blowing area 612 constitutes a "blowing area", and the drum blocking area 613 constitutes a "1 st blocking area". In the upper conveying conveyor 32, the upper blocking area 711 constitutes a "2 nd blocking area", and the suction area 712 constitutes a "2 nd suction area".
Here, in the 2 nd receiving section 302, the tablet 9 transferred from the drum air-blowing region 612 of the conveying drum 31 to the tablet receiving position P1 of the upper conveying conveyor 32 is conveyed on the upper conveying conveyor 32 in a state of facing a portion of the conveying drum 31 adjacent to the downstream side of the drum air-blowing region 612. Therefore, in the portion of the conveying drum 31 adjacent to the downstream side of the drum air blowing region 612, air pressure such as negative pressure or positive pressure acts on the through hole 600 from the inside of the drum circulation portion 61, and the tablet 9 delivered to and received by the upper conveying conveyor 32 may be affected by the action of the air pressure. In this way, the tablet 9 transferred to the upper conveying conveyor 32 may be displaced by the air pressure.
In the conveying mechanism 30, the roller feeding portion 61a of the conveying roller 31 has a roller blocking area 613. Thus, the tablets 9 transferred from the drum blowing region 612 to the tablet receiving position P1 of the upper conveyor 32 can be prevented from being positionally displaced due to a change in the air pressure inside the conveying drum 31.
Before the delivery of the tablet 9 to the 2 nd receiving unit 302, the tablet 9 is conveyed on the upstream side of the drum air-blowing region 612 of the conveying drum 31 in a state of facing the upstream side portion of the upper conveying conveyor 32 adjacent to the tablet receiving position P1. Therefore, if an air pressure such as a negative pressure or a positive pressure acts on the through-hole 700 from the inside of the conveying conveyor 71 in a portion of the upper conveying conveyor 32 adjacent to the upstream side of the tablet receiving position P1, the tablet 9 conveyed on the conveying drum 31 may be affected by the action of the air pressure. In this way, the tablet 9 before delivery may be displaced by the air pressure.
In the conveying mechanism 30, the upper conveyor receiving portion 71a of the upper conveyor 32 has an upper blocking area 711 at a position adjacent to the upstream side of the tablet receiving position P1. This can prevent the tablets 9 from being misaligned due to a change in the air pressure inside the upper conveyor 32 before the delivery of the tablets 9. In this way, it is possible to suppress the occurrence of positional deviation of the tablet 9 before and after the delivery of the tablet 9 at the 2 nd delivery part 302. Therefore, the printing apparatus 1 can reduce the occurrence of defective products.
In addition, with the above configuration, the 3 rd delivery part 303 that delivers the tablet 9 is configured by the conveyor delivery part 71b of the upper conveying conveyor 32 and the conveyor receiving part 71a of the lower conveying conveyor 33. In the 3 rd delivery part 303, the upper conveying conveyor 32 constitutes a "1 st conveying part", the conveying belt 71 of the upper conveying conveyor 32 constitutes a "1 st circulating part", the conveyor discharge part 71b of the upper conveying conveyor 32 constitutes a "discharge part", the lower conveying conveyor 33 constitutes a "2 nd conveying part", the conveying belt 71 of the lower conveying conveyor 33 constitutes a "2 nd circulating part", and the conveyor receiving part 71a of the lower conveying conveyor 33 constitutes a "receiving part". In addition, the suction area 712 constitutes a "1 st suction area", the air blowing area 713 constitutes an "air blowing area", and the lower blocking area 714 constitutes a "1 st blocking area" of the upper conveying conveyor 32. In the lower conveying conveyor 33, the upper blocking area 711 constitutes a "2 nd blocking area", and the suction area 712 constitutes a "2 nd suction area".
Since the conveyor delivery portion 71b of the upper conveyor 32 has the lower blocking area 714, the occurrence of positional deviation of the tablets 9 due to a change in the air pressure inside the upper conveyor 32 can be suppressed with respect to the tablets 9 delivered from the air blowing area 713 of the upper conveyor 32 to the tablet receiving position P2 of the lower conveyor 33.
Since the conveyor receiving portion 71a of the lower conveying conveyor 33 has the upper blocking area 711 at a position adjacent to the upstream side of the tablet receiving position P2, it is possible to suppress the occurrence of positional deviation of the tablets 9 due to a change in the air pressure inside the lower conveying conveyor 33 before the delivery of the tablets 9. In this way, the occurrence of positional displacement of the tablet 9 before and after the delivery of the tablet 9 at the 3 rd delivery part 303 can be suppressed. Therefore, the occurrence rate of defective products can be further reduced in the printing apparatus 1.
<3 > adjustment of position of conveying part >
Next, the positional adjustment of each part of the conveyance mechanism 30 before use of the printing apparatus 1 will be described with reference to fig. 4, 9, and 10. Fig. 9 is a schematic diagram showing the positional relationship of each part of the conveyance mechanism 30 before use of the printing apparatus 1. In fig. 9, the positions of the upper transport conveyor 32, the lower transport conveyor 33, and the carry-out conveyor 34 when the printing apparatus 1 is in use are indicated by broken lines. Fig. 10 is a flowchart showing a flow of position adjustment of each part of the conveyance mechanism 30 at the start of use of the printing apparatus 1.
The printing apparatus 1 can perform printing processing on a plurality of types of tablets 9. The tablet 9 varies depending on its kind, thickness, size, shape, and the like. Therefore, the shapes of the appropriate holding portions 610, 710 differ depending on the type of the tablet 9 to be conveyed (printed). In the printing apparatus 1, the roller circulation unit 61 and the conveying belt 71 can be replaced according to the type of the tablet 9 to be conveyed.
Whether or not the cylinder circulation unit 61 and the conveying belt 71 are replaced according to the type of the printing target, the appropriate interval between the conveying units at the delivery position of the tablets 9 differs depending on the type of the tablets 9 to be conveyed. Therefore, the interval between the lower end of the supply feeder 24 and the transport drum 31, the interval between the drum air-blowing region 612 of the transport drum 31 and the tablet receiving position P1 of the upper transport conveyor 32, and the interval between the air-blowing region 713 of the upper transport conveyor 32 and the tablet receiving position P2 of the lower transport conveyor 33 are preferably changed depending on the type of the tablet 9 to be transported.
If the intervals between the conveying sections of the respective transfer sections 301, 302, 303 are not appropriate, defects such as chipping may occur in the tablets 9, or the tablets 9 may be misaligned. As a result, the occurrence rate of defective products becomes high. Therefore, it is important to appropriately maintain the intervals between the conveying sections of the transfer sections 301, 302, and 303.
As schematically shown in fig. 4 and 9, the conveying mechanism 30 of the present embodiment includes a1 st moving mechanism 35 that moves the position of the conveying roller 31, a2 nd moving mechanism 36 that moves the position of the upper conveying conveyor 32, a3 rd moving mechanism 37 that moves the position of the lower conveying conveyor 33, and a4 th moving mechanism 38 that moves the position of the carry-out conveyor 34. The printing apparatus 1 further includes an input unit 11 for inputting information to the control unit 10. The input unit 11 may be constituted by a keyboard, a mouse, and a display, for example, or may be constituted by a touch panel. As shown in fig. 4, the control unit 10 is communicably connected to the 1 st transfer mechanism 35, the 2 nd transfer mechanism 36, the 3 rd transfer mechanism 37, the 4 th transfer mechanism 38, and the input unit 11, respectively.
Before the printing apparatus 1 starts to be used, as shown in fig. 9, the transport cylinder 31, the upper transport conveyor 32, the lower transport conveyor 33, and the carry-out conveyor 34 are disposed at the standby positions a1, a2, A3, and a4, respectively. Then, the transport cylinder 31, the upper transport conveyor 32, the lower transport conveyor 33, and the carry-out conveyor 34 are moved to the printing positions B1, B2, B3, and B4, respectively, by performing the position adjustment.
When the transport cylinder 31, the upper transport conveyor 32, the lower transport conveyor 33, and the carry-out conveyor 34 of the transport mechanism 30 are disposed at the standby positions a1 to a4, respectively, the intervals therebetween are larger than those between the printing positions B1 to B4. Specifically, the distance between the lower end of the supply feeder 24 and the transport cylinder 31 at the standby position a1 is larger than the distance between the lower end of the supply feeder 24 and the transport cylinder 31 at the printing position B1. The interval between the transport cylinder 31 at the standby position a2 and the upper transport conveyor 32 at the standby position A3 is larger than the interval between the transport cylinder 31 at the printing position B2 and the upper transport conveyor 32 at the printing position B3. The interval between the upper transport conveyer 32 at the standby position A3 and the lower transport conveyer 33 at the standby position a4 is larger than the interval between the upper transport conveyer 32 at the printing position B3 and the lower transport conveyer 33 at the printing position B4.
In the present embodiment, the upper transport conveyor 32 moves the pulley 72 (the 1 st pulley 721) at the side of delivering and receiving the tablets 9 at the standby position a2 and the printing position B2, but the other pulley 72 (the 2 nd pulley 722) does not move. Similarly, in the lower conveying conveyor 33, the one pulley 72 that delivers and receives the tablets 9 moves at the standby position a3 and the printing position B3, but the other pulley 72 does not move. In this manner, the interval between the conveying sections can be adjusted at least at the portion where the tablet 9 is transferred.
As shown in fig. 10, when the position of the printing apparatus 1 is adjusted before the start of use, the user first prepares each cycle (step S1). Specifically, the drum circulation portion 61 of the conveying drum 31, the conveying belt 71 of the upper conveying conveyor 32, and the conveying belt 71 of the lower conveying conveyor 33 are replaced as necessary according to the type of the tablet 9 to be conveyed.
Next, the user inputs information on the type of tablet 9 to be printed (conveyed) to the control unit 10 via the input unit 11 (step S2). In the present embodiment, data including information on the printing positions B1, B2, B3, and B4 of each part of the conveying mechanism 30 for each type of tablet 9 is stored in advance in the storage unit 103 of the control unit 10. Therefore, when the type of tablet 9 is input, the control unit 10 retrieves the data from the storage unit 103, and performs the following steps S3 to S7. The information input in step S2 may be information relating to the shape or size of tablet 9.
After the controller 10 recognizes the printing positions B1, B2, B3, and B4, the controller 10 moves the transport cylinder 31 from the standby position a1 to the printing position B1 by the first moving mechanism 35 (step S3). Thereby, the conveying drum 31 moves closer to the supply feeder 24 side from the standby position a1, and the interval between the supply feeder 24 and the conveying drum 31 becomes an interval corresponding to the type of the tablet 9.
Next, the controller 10 moves the upper transport conveyer 32 from the standby position a2 to the printing position B2 by the 2 nd moving mechanism 36 (step S4). Thus, the upper conveying conveyor 32 moves closer to the conveying roller 31 from the standby position a2, and the interval between the conveying roller 31 and the upper conveying conveyor 32 becomes an interval corresponding to the type of the tablet 9.
Thereafter, the controller 10 moves the lower transport conveyer 33 from the standby position a3 to the printing position B3 by the 3 rd moving mechanism 37 (step S5). Thus, the lower conveying conveyor 33 moves closer to the upper conveying conveyor 32 from the standby position a3, and the interval between the upper conveying conveyor 32 and the lower conveying conveyor 33 is set to an interval corresponding to the type of the tablet 9.
Then, the control unit 10 moves the carry-out conveyor 34 from the standby position a4 to the printing position B4 (step S6). Thereby, the carry-out conveyor 34 approaches the lower conveying conveyor 33 from the standby position a 4.
In this way, the distances between the conveying roller 31, the upper conveying conveyor 32, the lower conveying conveyor 33, and the carry-out conveyor 34 of the conveying mechanism 30 are set according to the type of the tablet 9. This makes it possible to transfer the tablets 9 between the conveying roller 31, the upper conveying conveyor 32, the lower conveying conveyor 33, and the carry-out conveyor 34 of the conveying mechanism 30 at intervals corresponding to the types of the tablets 9. Therefore, when the transfer of the tablets 9 is performed between the transfer drum 31, the upper transfer conveyor 32, the lower transfer conveyor 33, and the carry-out conveyor 34, it is possible to suppress the occurrence of chipping of the tablets 9 or positional deviation of the tablets 9.
When the movement of each of the conveying roller 31, the upper conveying conveyor 32, the lower conveying conveyor 33, and the carry-out conveyor 34 of the conveying mechanism 30 is completed in steps S3 to S6, the positions in the conveying direction of the roller circulating unit 61 and the conveying belt 71 as the circulating units having the holding units 610 and 710 are adjusted (steps S7 to S9).
First, the control unit 10 rotates the roller circulation unit 61 to adjust the conveyance direction position of the roller circulation unit 61 of the conveyance roller 31 to the initial position (step S7). In the present embodiment, in the initial position, the drum circulation unit 61 is disposed so that a portion between the rows formed by the holding portions 610 faces the lower end portion of the feeder 24. This can prevent the tablet 9 fed into the feeder 24 from colliding with the edge of the holding portion 610 and being broken before the conveyance by the conveyance mechanism 30 starts.
Next, the controller 10 rotates the conveying belt 71 of the upper conveying conveyor 32 to adjust the conveying direction position of the conveying belt 71 to the initial position (step S8). The initial position of the conveyor belt 71 of the upper conveyor 32 is determined by the initial position of the roller circulating portion 61 of the conveyor roller 31. Specifically, the conveyance direction position of the holding portion 710 of the upper conveyance conveyor 32 and the conveyance position of the holding portion 610 of the conveyance roller 31 are disposed at positions facing each other at the 2 nd delivery portion 302.
Next, the controller 10 rotates the conveying belt 71 of the lower conveying conveyor 33 to adjust the conveying direction position of the conveying belt 71 to the initial position (step S9). The initial position of the conveyor belt 71 of the lower conveyor 33 is determined by the initial position of the conveyor belt 71 of the upper conveyor 32. Specifically, the conveyance direction position of the holding portion 710 of the lower conveyance conveyor 33 and the conveyance direction position of the holding portion 710 of the upper conveyance conveyor 32 are disposed at positions facing each other at the 3 rd delivery part 303.
In steps S7 to S9, the tablet 9 can be smoothly transferred between the holding portions 610, 710 at the transfer portions 301, 302, 303 by adjusting the conveying direction positions of the holding portions 610, 710 of the circulating portions 61, 71. Therefore, the positional deviation of the tablet 9 can be suppressed.
In the present embodiment, the conveying roller 31 is moved to adjust the distance between the supply feeder 24 and the conveying roller 31. However, the supply feeder 24 side may be moved to adjust the interval between the supply feeder 24 and the transport drum 31. Similarly, the moving order or moving direction of the transfer roller 31, the upper transfer conveyor 32, the lower transfer conveyor 33, and the carry-out conveyor 34 is not limited to the above description.
<4. modified example >
While the main embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.
The conveyance mechanism 30 is provided inside the printing apparatus 1, but the present invention is not limited to this. The conveyance mechanism 30 of the present invention may be used for applications other than the printing apparatus 1.
The printing apparatus 1 is an apparatus for printing both sides of the tablet 9 by the 1 st printing unit 41 and the 2 nd printing unit 42. However, the tablet printing apparatus of the present invention may be an apparatus that prints only one side of the tablet 9.
The detailed configuration of the printing apparatus 1 may be different from those shown in the drawings of the present application. In addition, the respective components shown in the above-described embodiments or modifications may be appropriately combined within a range not to cause contradiction.
[ description of reference numerals ]
1 printing device
9 tablets
10 control part
24 feed feeder
30 conveying mechanism
31 conveying roller
32 upside conveying conveyer
33 lower side conveying conveyor
34 carry-out conveyor
61 roller circulation part
61a roller feeding part
62 cylindrical part
63 roller housing part
64 suction mechanism
65 pressure mechanism
70 inner space
71 conveyor belt
71a conveyor receiving section
71b conveyor delivery part
72 pulley
74 side cover
75 suction mechanism
76 st shield member
77 nd 2 nd shield member
78 pressure mechanism
600 through hole
610 holding part
611 roller suction area
612 drum blow zone
613 roller shielding area
621 outer peripheral surface
622 concave part
623 suction path portion
624 suction port
625 pressure channel part
626 air outlet
700 through hole
710 holding part
711 Upper occlusion area
712 adsorption zone
713 blow zone
714 lower occlusion area
723 connecting part
724 disc part
760 st shield surface
761 1 st shield part
762 the 1 st fixed part
770 No. 2 shield surface
771 No. 2 Shielding part
772 the 2 nd fixing part
773 air outlet
774 pressurization path part

Claims (7)

1. A conveying device for conveying granular objects, comprising:
a1 st conveying part having a1 st circulating part in a circulating belt shape; and
a2 nd conveying section disposed downstream of the 1 st conveying section and having a2 nd circulating section in a circulating belt shape and a pair of cylindrical pulleys;
the 1 st circulation unit and the 2 nd circulation unit each include a plurality of through holes arranged in a grid pattern with an interval therebetween in the conveying direction and the width direction,
the 1 st circulation part has a cylindrical delivery part,
the 2 nd circulation part has a cylindrical receiving part opposed to the delivery part via a gap,
the feeding section is provided with, in order from the upstream side toward the downstream side, adjacently in the conveyance direction:
a1 st suction region in which suction force acts on the through-hole from the inside of the 1 st circulation unit;
a blow-off region in which gas is blown from the inside of the 1 st circulating unit to the through hole; and
a1 st blocking area for blocking the action of the air pressure on the through hole,
the receiving unit is provided with:
a2 nd blocking area for blocking the action of the air pressure on the through hole; and
a2 nd adsorption region which continues from a position facing the air blowing region to a downstream side and in which a suction force acts on the through hole from an inside of the 2 nd circulation portion,
the 2 nd circulating part is a conveying belt annularly arranged between the pair of pulleys and circulates around the pair of pulleys,
the 2 nd conveying section further includes:
a cover portion that covers a side surface in the width direction of the space surrounded by the 2 nd circulation portion;
a1 st shielding member for blocking communication between an internal space surrounded by the 2 nd circulating unit and the cover unit and the through hole; and
a suction mechanism for generating a negative pressure lower than the atmospheric pressure in the internal space,
the pulleys each have:
a plurality of circular plate portions arranged at intervals in the width direction and having a cylindrical outer peripheral surface; and
a connecting portion connecting the plurality of circular plate portions in the width direction,
the through hole of the 2 nd circulating part is arranged at a position not overlapping with the circular plate part in the width direction,
the 1 st shielding member has a plurality of 1 st shielding portions, and the plurality of 1 st shielding portions are arranged between the circular plate portions adjacent in the width direction at positions on the upstream side of the 2 nd suction region and overlapping the 2 nd shielding region.
2. The handling device according to claim 1,
the 1 st circulating part circulates in a cylindrical shape.
3. The handling device according to claim 2,
the 1 st conveying section further includes:
a cylindrical portion disposed inside the 1 st circulating portion;
a suction mechanism that generates a negative pressure below atmospheric pressure; and
a pressurizing mechanism that generates a positive pressure higher than the atmospheric pressure,
the 1 st circulation part circulates in a cylindrical shape around the cylindrical part,
the cylindrical portion includes:
a cylindrical outer peripheral surface;
a recess portion which is disposed inside the 1 st suction region and is recessed inward from the outer peripheral surface;
a suction passage portion connecting a space in the recess portion to the suction mechanism;
an air outlet disposed in the air blowing region and provided on the outer peripheral surface; and
a pressurizing passage portion connecting the air outlet and the pressurizing mechanism,
the outer peripheral surface of the cylindrical portion blocks communication between the through hole and the suction passage portion and the pressure passage portion at a position in the conveyance direction overlapping with the 1 st blocking area.
4. The handling device according to claim 1,
the first conveying part 1 further comprises a pair of cylindrical pulleys,
the 1 st circulating unit is a conveying belt annularly installed between the pair of pulleys, and circulates around the pair of pulleys.
5. A conveying device for conveying granular objects, comprising:
a1 st conveying part which is provided with a1 st circulating part in a circulating belt shape and a pair of pulleys in a cylindrical shape; and
a2 nd conveying part arranged downstream of the 1 st conveying part and having a2 nd circulating part in a circulating belt shape;
the 1 st circulation unit and the 2 nd circulation unit each include a plurality of through holes arranged in a grid pattern with an interval therebetween in the conveying direction and the width direction,
the 1 st circulation part has a cylindrical delivery part,
the 2 nd circulation part has a cylindrical receiving part opposed to the delivery part via a gap,
the feeding section is provided with, in order from the upstream side toward the downstream side, adjacently in the conveyance direction:
a1 st suction region in which suction force acts on the through-hole from the inside of the 1 st circulation unit;
a blow-off region in which gas is blown from the inside of the 1 st circulating unit to the through hole; and
a1 st blocking area for blocking the action of the air pressure on the through hole,
the receiving unit is provided with:
a2 nd blocking area for blocking the action of the air pressure on the through hole; and
a2 nd adsorption region which continues from a position facing the air blowing region to a downstream side and in which a suction force acts on the through hole from an inside of the 2 nd circulation portion,
the 1 st circulating part is a conveying belt annularly arranged between the pair of pulleys and circulates around the pair of pulleys,
the 1 st conveying section further includes:
a cover portion that covers a side surface in the width direction of the space surrounded by the 1 st circulating portion;
a2 nd shielding member having a shielding surface for blocking communication between an internal space surrounded by the 1 st circulating unit and the cover unit and the through hole;
a suction mechanism for generating a negative pressure lower than atmospheric pressure in the internal space;
a pressurizing mechanism that generates a positive pressure higher than the atmospheric pressure; and
a blow-out port disposed in the blow-out region and connecting the through-hole to the pressurizing mechanism,
the pulleys each have:
a plurality of circular plate portions arranged at intervals in the width direction and having a cylindrical outer peripheral surface; and
a connecting portion that connects the plurality of circular plate portions in the width direction;
the through hole of the 1 st circulating part is arranged at a position not overlapping with the disc part,
the 2 nd shielding member has a plurality of 2 nd shielding portions arranged between the circular plate portions adjacent in the width direction.
6. The handling device according to any one of claims 1 to 5,
the above-mentioned granules are tablets.
7. A printing apparatus, comprising:
the conveyance device according to any one of claims 1 to 5; and
and a printing unit that ejects ink droplets onto the surface of the granular object conveyed by the conveying device.
CN201780071553.8A 2016-11-18 2017-10-24 Conveyance device and printing device Active CN109996525B (en)

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JP2016225365A JP6757237B2 (en) 2016-11-18 2016-11-18 Conveyor and printing equipment
PCT/JP2017/038257 WO2018092525A1 (en) 2016-11-18 2017-10-24 Conveying device and printing device

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TW201825300A (en) 2018-07-16
KR20190067232A (en) 2019-06-14
JP6757237B2 (en) 2020-09-16
TWI659857B (en) 2019-05-21
JP2018079241A (en) 2018-05-24
KR102261256B1 (en) 2021-06-04
WO2018092525A1 (en) 2018-05-24

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