Outer appearance inspection device and packaging machine

Abstract

To provide an outer appearance inspection device and a packaging machine capable of reducing a size of the packaging machine.SOLUTION: An outer appearance inspection device includes: imaging parts 3111, 3112 for imaging a packaging pack BP held by a chuck unit 322; and an illumination part 313 having light emitting parts 3132A, 3132B, 3132C so as to radiate light emitted from the light emitting parts toward the packaging pack BP while the packaging pack BP is held by the chuck unit 322. The illumination part 313 is operated in one of modes among a first lighting mode where the light emitting parts 3132A, 3132C are lit, a third lighting mode, and a second lighting mode where the light emitting part 3132B is lit.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a visual inspection device and a packaging machine. [Background technology]

[0002] A PTP packaging machine that manufactures a PTP sheet in which tablets are placed in pockets formed in a container film and a cover film is attached to the container film to close the pockets has been proposed, which includes an appearance inspection device for inspecting the container film for adhesion of foreign matter after tablets are placed in the pockets of the transported strip-shaped container film and before the cover film is attached to the container film (see, for example, Patent Document 1). In this PTP packaging machine, after the cover film is attached to the container film to generate the PTP film, a separation slit is formed at a predetermined position in the PTP film, a mark is applied, and then the PTP sheet is punched out from the PTP film. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6606244 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the PTP packaging machine described in Patent Document 1, when inspecting the positional deviation of the pocket position or the separation slit position in the PTP sheet, it is necessary to provide a separate appearance inspection device for inspecting the appearance of the PTP sheet in the process after punching the PTP sheet. Therefore, at least two appearance inspection devices are required, which may increase the size of the PTP packaging machine.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a visual inspection device and a packaging machine that can reduce the size of the packaging machine. [Means for solving the problem]

[0006] In order to achieve the above object, the visual inspection apparatus according to the present invention comprises: 1. A visual inspection device for inspecting the visual appearance of a packaging pack having a container film in which a pocket for accommodating a workpiece is formed and a cover film attached to the container film so as to cover the pocket, an imaging section that images the packaging pack held by a chuck unit having a plurality of suction pads and that suction-holds a plurality of points on the cover film side of the packaging pack; an illumination unit having a plurality of light-emitting units, and irradiating light emitted from at least one of the plurality of light-emitting units toward a side of the container film opposite to the cover film side while the packaging pack is held by the chuck unit; The lighting unit operates in one of a number of lighting modes having different ratios of diffuse reflected light emitted from at least one of the plurality of light-emitting units, diffused by the packaging pack, and then incident on the imaging unit, and specular reflected light emitted from at least one of the plurality of light-emitting units, reflected by the packaging pack, and then incident on the imaging unit. Effect of the Invention

[0007] According to the present invention, the chuck unit sucks and holds the cover film side of the packaging pack at multiple locations with multiple suction pads, so that the packaging pack can be prevented from curling. The illumination unit operates in one of multiple lighting modes with different ratios of diffuse reflection light incident on the imaging unit and regular reflection light incident on the imaging unit. With the packaging pack held by the chuck unit, the illumination unit switches the lighting mode, so that the imaging unit can capture an image in which the workpiece contained in the pocket of the packaging pack is more clearly reflected than the surface and peripheral part of the pocket of the packaging pack, or the imaging unit can capture an image in which the surface and peripheral part of the pocket of the packaging pack are more clearly reflected than the workpiece. Therefore, in one appearance inspection device, the appearance inspection of the workpiece and the inspection of the pocket position, slit position, etc. in the packaging pack can be performed simply by switching the lighting mode of the illumination unit, so that the number of appearance inspection devices required for the packaging machine can be reduced, and the packaging machine can be made smaller accordingly. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic front view of a packaging machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic configuration diagram of a heating device and a molding device according to the embodiment. [Diagram 3] FIG. 2 is a schematic configuration diagram of a slit forming device and a punching device according to the embodiment. [Figure 4] 4A is a cross-sectional view taken along line AA in FIG. 3 of the slit forming device according to the embodiment, and FIG. 4B is a cross-sectional view taken along line BB in FIG. 3 of the slit forming device according to the embodiment. [Diagram 5] FIG. 2A is a side view of a film position changing section according to the embodiment, and FIG. 2B is a cross-sectional view taken along line CC of FIG. [Figure 6] FIG. 2 is a schematic configuration diagram of a rotary suction and appearance inspection unit according to an embodiment. [Figure 7]1A and 1B show a chuck unit according to an embodiment, in which FIG. [Figure 8] 1A and 1B show a schematic side view of a visual inspection device according to an embodiment in a first lighting mode and a second lighting mode, respectively. [Figure 9] 11 is a schematic side view of the appearance inspection apparatus according to the embodiment in a third lighting mode. FIG. [Figure 10] 1 shows an example of an image captured when the illumination unit in the embodiment is in a first lighting mode, where (A) is an image captured by one of the two imaging units, and (B) is an image captured by the other. [Figure 11] 1 shows an example of an image captured when the illumination unit in the embodiment is in a first lighting mode, where (A) is an image captured by one of the two imaging units, and (B) is an image captured by the other. [Figure 12] 2 is a block diagram showing a configuration of a control device according to an embodiment; FIG. [Figure 13] 5 is a flowchart showing an example of the flow of an appearance inspection process executed by the packaging machine according to the embodiment. [Figure 14] FIG. 13 is a plan view of a chuck unit according to a modified example. [Figure 15] 13 is a schematic side view of a packaging pack conveying device according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A packaging machine according to an embodiment of the present invention will be described below with reference to the drawings. The packaging machine according to the present embodiment is for manufacturing packaging packs such as blister packs and PTP packs. Here, the packaging pack has a container film in which a pocket for accommodating a workpiece is formed, and a cover film attached to the container film so as to cover the pocket. Here, examples of the workpiece include tubular containers, tablets, food, electronic parts, medical devices, etc.

[0010] 1, the packaging machine according to this embodiment includes a raw film supply unit 11, a heating device 29, a forming device 12, a work supply device 50, an appearance inspection device 31, a cover film supply unit 15, a sealing device 14, a slit forming / punching unit 17, and a rotary suction 32. The packaging machine also includes a pack conveying device 33 that receives the packaging pack from the rotary suction 32 and conveys it to a subsequent process, a chuck feed 232 that conveys the raw film F1 and the container film F2, a fixed chuck 231, guide rollers 241, 251 and rollers 242, 253 that guide the pack film F4 discharged from the sealing device 14, and a conveying section 281 that intermittently conveys the pack film F4 downstream. The packaging machine further includes a sliding guide 293 that regulates misalignment of the container film F2 in its width direction, a tension application unit 291 that applies tension to the container film F2, a tension adjustment unit 292, and a tension application unit 252 that applies tension to the packing film F4. The packaging machine also includes a film position change unit 26 that corrects misalignment of the packing film F4 in the slit forming device 171 of the slit forming and punching unit 17 described below, and a scrap collection unit 39 that collects scraps discharged from the slit forming and punching unit 17. The packaging machine further includes a collection unit (not shown) that collects so-called defective packaging packs, such as packaging packs with defective shapes discharged from the rotary suction 32 or packaging packs in which no work is packaged. The packaging machine also includes a stage 70 that supports the container film F2 in a state in which a workpiece can be supplied to the pocket of the container film F2, a control device 90 that controls each device, and a packaging machine main body 99 that houses the raw film supply unit 11, the forming device 12, the appearance inspection device 31, the cover film supply unit 15, the sealing device 14, the slit forming and punching unit 17, etc. In order to clarify the drawing in Fig. 1, the control device 90 is drawn on the outside of the packaging machine main body 99, but in reality it is installed on the back side of the packaging machine main body 99.

[0011] In this packaging machine, as shown by the arrow AR1, the raw material film F1 supplied from the raw material film supply unit 11 is conveyed to the heating device 29 and the forming device 12 by the chuck feed 232. Then, as shown by the arrow AR2, the container film F2 generated from the raw material film F1 in the forming device 12 is conveyed to the sealing device 14 by the conveying section 141 of the sealing device 14 through the upper part of the stage 70. Meanwhile, as shown by the arrow AR3, the cover film F3 supplied from the cover film supply unit 15 is conveyed to the sealing device 14 by the conveying section 141 of the sealing device 14. Then, the sealing device 14 attaches the cover film F3 to the container film F2 to generate a pack film F4. Also, as shown by the arrow AR4, the pack film F4 generated by the sealing device 14 is conveyed downstream by the conveying section 141. Meanwhile, as shown by the arrow AR5, the pack film F4 conveyed downstream of the sealing device 14 is intermittently conveyed to the slit forming and punching unit 17 by the conveying section 281. Then, the slit forming and punching unit 17 cuts the scrap F5 and discharges it to the scrap recovery section 39.

[0012] The raw film supply unit 11 supplies a strip-shaped raw film F1 that is the source of the container film F2. The raw film supply unit 11 includes a reel 111 around which the raw film F1 is wound, rollers 1152, 1153, and 1165 that guide the raw film F1 supplied from the reel 111 to the heating device 29, a conveying section 1162 that conveys the raw film F1 to the heating device 29, a tension applying section 117, and a roller 1155 that guides the raw film F1 to the heating device 29. The conveying section 1162 includes a roller 1162a and a roller driving section 1162b that drives the roller 1162a. The tension applying section 117 includes a roller 1171, a long arm 1172 to which the roller 1171 is attached at one end in the longitudinal direction, and a support section 1173 that supports the arm 1172 at the other end in the longitudinal direction of the arm 1172 so that the arm 1172 can be turned. The tension applying section 117 applies tension to the raw film F1, which is stretched between rollers 1162a and 1155 of the transport section 1162, by contacting the raw film F1 from above with roller 1171 and pressing it vertically downward.

[0013] As shown in FIG. 2, the heating device 29 includes heat transfer plates 2901 and 2902, which are disposed on both sides of the raw film F1 in the thickness direction and have built-in heaters (not shown), and drive units 2903 and 2904 that support the heat transfer plates 2901 and 2902 and drive the heat transfer plates 2901 and 2902 in the vertical direction. The heat transfer plates 2901 and 2902 are formed of, for example, a metal with high thermal conductivity. The forming device 12 produces a belt-shaped container film F2 by forming pockets Po1 in the raw film F1. The forming device 12 includes a first mold 123 disposed vertically above the raw film F1 and a second mold 122 disposed vertically below the raw film F1. The second mold 122 includes a plug 122a having an outer shape slightly smaller than the inner shape of the pocket Po1 to be formed in the raw film F1, and an outlet hole (not shown) for discharging gas. Here, the plug 122a is disposed inside the discharge hole and can protrude to the outside of the discharge hole. Meanwhile, the first die 123 is provided with a recess 123a corresponding to the outer shape of the pocket Po1 to be formed in the raw film F1. The forming device 12 also includes a drive unit 124 that drives the first die 123 in the vertical direction, a drive unit 125 that drives the plug 122a in the vertical direction, a gas supply unit (not shown) that supplies gas, and a device body 121 that supports the drive units 124, 125 and the gas supply unit. The gas supply unit supplies gas to the discharge hole of the second die 122. With the raw film F1 disposed in the forming device 12, the forming device 12 moves the first die 123 vertically downward, and the first die 123 presses the raw film F1 against the second die 122. The molding device 12 then ejects gas from the ejection holes while the plug 122a of the first mold 123 is protruding vertically upward to stretch the raw material film F1, thereby producing a container film F2 having a pocket Po1.

[0014] Returning to FIG. 1, the fixed chuck 231 clamps the container film F2 vertically at the same time that the molding device 12 clamps the raw material film F1 between the first mold 123 and the second mold 122. The chuck feed 232 clamps the container film F2 before the molding device 12 separates the first mold 123 from the second mold 122, and after the clamping of the container film F2 by the fixed chuck 231 is released, the chuck feed 232 moves downstream while clamping the container film F2, thereby transporting the container film F2 downstream as shown by the arrow AR1. The chuck feed 232 then repeats the above-mentioned operation, thereby intermittently transporting the container film F2 downstream. A sliding guide 293 that guides the container film F2 is provided downstream of the chuck feed 232.

[0015] The tension applying unit 291 has a roller 2911, a long arm 2912 to one end of which the roller 2911 is rotatably attached, and a support unit 2913 to rotatably support the arm 2912 at the other end of which in the longitudinal direction. The tension applying unit 291 applies tension to the container film F2 by bringing the roller 2911 into contact with the container film F2 stretched between the sliding guide 293 and the tension adjusting unit 292 and pressing it vertically downward. The tension adjusting unit 292 has a roller 2921 around which the container film F2 is wound, and a powder clutch brake 2922 connected to the roller 2921 via a driven member shaft (not shown), and adjusts the rotational torque of the roller 2921 by the powder clutch brake 2922 to adjust the tension applied to the container film F2 stretched between the roller 2921 and the conveying unit 141 of the sealing device 14.

[0016] The work supplying device 50 puts workpieces into each pocket of the container film F2 with the container film F2 placed above the stage 70. The work supplying device 50 has a hopper 51, work feeders 521 and 53, and a coil chute 54. At the other end of the coil chute 54, a guide unit 56 is provided which is positioned at a position spaced a predetermined distance from the container film F2 pocket with the container film F2 placed above the stage 70 and guides the workpiece introduced from the coil chute 54 to the pocket.

[0017] The cover film supply unit 15 supplies a band-shaped cover film F3. The cover film supply unit 15 has a reel 151 around which the cover film F3 is wound, and a roller 1521 that guides the cover film F3 supplied from the reel 151 to the sealing device 14. The sealing device 14 seals the pocket Po1 of the container film F2 by attaching the cover film F3 to the container film F2 in a state in which a workpiece is contained in the pocket Po1 of the container film F2. The sealing device 14 has a conveying section 141 that continuously conveys the container film F2, the cover film F3, and the pack film F4 downstream, and a pressing section 142 that presses the cover film F3 against the container film F2 while heating the cover film F3 to attach the cover film F3 to the container film F2. The sealing device 14 also has a roller 1441 that guides the cover film F3 supplied from the cover film supply unit 15 to the conveying section 141.

[0018] The conveying section 141 has a cylindrical wheel 141a that supports the cover film F3, a long cylindrical support shaft 141d that supports the wheel, and a driving section 141h that rotates and drives the support shaft 141d. A plurality of recesses (not shown) that hold the pockets of the container film F2 are arranged side by side on the circumferential surface of the wheel 141a. The driving section 141h rotates the wheel 141a in a state in which the pockets of the container film F2 are held in some of the recesses of the wheel 141a. As a result, the pack film F4, which is formed by attaching the cover film F3 to the container film F2, is continuously conveyed to the downstream side of the sealing device 14. The pressing section 142 has a heat transfer roller 1421 that is pressed against the container film F2 and the cover film F3 wound around the wheel 141a of the conveying section 141, and a long arm 1422 to which the heat transfer roller 1421 is rotatably attached at one end in the longitudinal direction. The pressing unit 142 has an arm driving unit 1423 that supports the arm 1422 at the other end in the longitudinal direction of the arm 1422 so that one end of the arm 1422 can freely rotate around the other end as a base point and urges the one end of the arm 1422 in a direction pressing the one end of the arm 1422 against the heat transfer roller 1421, and a heating unit 1424 that heats the heat transfer roller 1421. The heat transfer roller 1421 is made of a metal with high thermal conductivity. The sealing device 14 presses the cover film F3 onto the outer periphery of the pocket of the container film F2 by sandwiching the cover film F3 overlapped on the container film F2 between the wheel 141a of the conveying unit 141 and the heat transfer roller 1421.

[0019] The guide rollers 241 and 251 each have a wheel 241a and 251a, and a shaft 241b and 251b that axially supports the wheel 241a and 251a. The wheels 241a and 251a each have a plurality of recesses (not shown) arranged in parallel along the circumferential direction for holding the pockets of the pack film F4. The tension application unit 252 has a roller 2521 and a long arm 2522 to which the roller 2521 is attached at one end in the longitudinal direction. The tension application unit 252 also has a support unit 2523 that rotatably supports the arm 2522 at the other end in the longitudinal direction of the arm 2522. The tension application unit 252 applies tension to the pack film F4 by bringing the roller 2521 into contact with the pack film F4 stretched between the guide roller 251 and the roller 253 from above and pressing it vertically downward.

[0020] The slit forming and punching unit 17 includes a slit forming device 171, a punching device 173, and a driving section 172 to which the slit forming device 171 is fixed on the -Y direction side and the punching device 173 is fixed on the +Y direction side. As shown in FIG. 3, the slit forming device 171 includes a die unit 1712 disposed on the -Y direction side of the pack film F4 and a head 1714 disposed on the +Y direction side of the pack film F4. The head 1714 is provided with a cutter 1714a for generating slits in the pack film F4. As shown in FIG. 4, the cutter 1714a is disposed opposite a plurality of (five in FIG. 4) portions for generating slits in the pack film F4. Returning to FIG. 3, the head 1714 is connected to a guide rod 1716 and a power transmission arm 1717 extending from the driving section 172 in the -Y direction. Furthermore, the slit forming device 171 has a frame-shaped head support part 1713 that supports the head 1714 inside so that it can slide freely in the Y-axis direction, and a main body part 1711 that is fixed to the drive part 172 and supports the die unit 1712 and the head support part 1713 together.

[0021] The punching device 173 punches out the packing film F4 when the packing film F4, which is intermittently conveyed by the conveying section 281, stops. The punching device 173 has a die unit 1732 arranged on the +Y direction side of the packing film F4, and a head 1734 arranged on the -Y direction side of the packing film F4. The head 1734 has a base 17341, a punching cutter 1735 that is erected on the side of the base 17341 where the packing film F4 is arranged, i.e., on the +Y direction side, for punching out the packaging packs BP from the packing film F4, and a scrap cutting cutter 1737 that cuts the scraps F5 after the packaging packs BP are punched out of the packing film F4. The scrap cutting cutter 1737 is arranged downstream of the portion of the packing film F4 that faces the punching cutter 1735, i.e., facing the -Z direction side. That is, the scrap cutting cutter 1737 is erected on the -Z direction side of the punching cutter 1735 on the +Y direction side of the base 17341. Here, the tip of the scrap cutting cutter 1737 extends further away from the base 17341 than the tip of the punching cutter 1735, that is, toward the +Y direction side. Furthermore, the head 1734 is connected to a guide rod 1736a and a power transmission arm 1736b extending from the driving unit 172 in the +Y direction. The die unit 1732 has a base 17321 in which an opening 1732a is formed in the center for discharging the packaging pack BP punched out of the packing film F4 toward the +Y direction side of the die unit 1732, and a guide member 1739 for guiding the packing film F4. The punching device 173 has a main body 1731 fixed to the driving unit 172 and supporting the die unit 1732. The drive unit 172 has a slit forming device drive unit 1721 that moves the power transmission arm 1717 along the Y-axis direction, a punching device drive unit 1722 that moves the power transmission arm 1717 along the Y-axis direction, and a housing 1723 that houses these. The punching device 173 moves a head 1734 to punch out packaging packs BP from the packing film F4 with a punching cutter 1735 and cut scraps F5 with a scrap cutting cutter 1737.Here, the punched packaging pack BP is delivered to the rotary suction 32, and the cut scraps F5 fall into the scrap recovery section 39.

[0022] As shown in Fig. 4(B), the film position changing unit 26 is a second film position changing unit having a guide roller 261 that guides the pack film F4 sent to the slit forming device 171, a roller support unit 263 that rotatably supports the guide roller 261, and a guide drive unit 264. The guide roller 261 has three wheels 261a and a shaft 261b that axially supports the three wheels 261a. The guide drive unit 264 moves the guide roller 261 via the roller support unit 263 in the width direction of the pack film F4, i.e., in the X-axis direction (see arrow AR12 in Fig. 4(B)) and in the direction along the transport direction of the pack film F4, i.e., in the Z-axis direction (see arrow AR11 in Fig. 4(B)). The guide driving unit 264 changes the position of the wheel 261a to a position shifted by a distance W1 in the +X direction, for example, as shown by the dotted line in Figure 4 (B), thereby changing the position of the pack film F4 in the X-axis direction in the slit forming device 171 to a position shifted by the distance W1 in the +X direction.

[0023] Returning to FIG. 3, the conveying section 281 has a film feed roller 2811 around which the pack film F4 is wound, and a roller driving section 2812. The film feed roller 2811 has a plurality of recesses arranged in parallel along the circumferential direction for holding the pockets Po1 of the pack film F4. The conveying section 281 intermittently rotates the film feed roller 2811 by a preset rotation angle while the pockets of the pack film F4 are held in some of the recesses of the film feed roller 2811, thereby intermittently sending out the pack film F4 to the punching device 173 by a preset reference distance. Here, the reference distance is set to be equal to the length of a portion of the pack film F4 that corresponds to one packaging pack in the longitudinal direction. In addition, a film pressing section 282 is arranged on the +Y direction side of the conveying section 281 to prevent the pack film F4 from coming off the film feed roller 2811 during conveyance of the pack film F4. The film pressing unit 282 has a roller 2821 that contacts the pack film F4 wound around the film feed roller 2811 from the +Y direction side of the film feed roller 2811, and a long arm 2822 to one end in the longitudinal direction of which the roller 2821 is attached. The film pressing unit 282 also has an arm driver 2823 that rotatably supports the other end in the longitudinal direction of the arm 2822 and biases one end of the arm 2822 in a direction to press it against the roller 2821.

[0024] The film position changing section 283 is a first film position changing section having a film guide 2831 arranged downstream of the transport section 281 to guide the pack film F4, and a guide driving section 2832 to drive the film guide 2831 along the width direction of the pack film F4, i.e., the X-axis direction. As shown in FIG. 5(A), the film guide 2831 has a guide body 2831a arranged to face one surface side in the thickness direction of the pack film F4 and having a groove 2831d formed on the surface on the pack film F4 side. The film guide 2831 also has an auxiliary plate 2831b arranged to face the other surface side in the thickness direction of the pack film F4, and a support member 2831c that collectively supports the guide body 2831a and the auxiliary plate 2831b. The guide driving section 2832 drives the film guide 2831 along the X-axis direction via the support member 2831c, as shown by the arrow AR5 in FIG. 5(A), to change the position of the film guide 2831 in the X-axis direction. The guide driving unit 2832 changes the position of the film guide 2831 to a position shifted by the distance W2 in the +X direction, for example, as shown by the dotted line in Figure 5 (B), thereby changing the position of the pack film F4 in the X-axis direction in the punching device 173 to a position shifted by the distance W2 in the +X direction.

[0025] 6, the rotary suction 32 includes a cylindrical drum 321, four chuck units 322 fixed to the periphery of the drum 321 to hold the packaging packs BP, and a drum driving unit 323 for rotating the drum 321. The drum driving unit 323 rotates the drum 321 to position the chuck units 322 at a receiving position Pos1 for receiving the packaging packs BP from the punching device 173 and at an imaging position Pos2 for imaging the packaging packs BP held by the chuck units 322 by imaging units 3111 and 3112 of the appearance inspection device 31 described below. The drum driving unit 323 further rotates the drum 321 to position the chuck units 322 at a collection position Pos3 for discharging defective packaging packs BP held by the chuck units 322 to a collection unit (not shown) and at a transfer position Pos4 for transferring the packaging packs BP held by the chuck units 322 to the pack conveying device 33. Here, the drum driving unit 323 places the chuck unit 322 holding the packaging pack BP determined to be defective at the collection position Pos3 based on a control signal input from the control device 90, and when the chuck unit 322 releases its hold on the packaging pack BP based on the control signal input from the control device 90, the packaging pack BP is discharged to the collection unit.

[0026] The chuck unit 322 is detachably fixed to the drum 321 as shown in Fig. 7(A) and (B). The chuck unit 322 has a plurality of suction heads 333 (six in Fig. 7(B)), suction pads 332 made of an elastic material and attached to the tips of the plurality of suction heads 333, and a rectangular box-shaped head support part 331 that supports the plurality of suction heads 333 collectively and is fixed to the drum 321. A tube 333a that is maintained in a reduced pressure state when the packaging pack BP is sucked is provided inside the suction head 333. Furthermore, a tube 331a that communicates with each of the tubes 333a is provided inside the head support part 331. Furthermore, a plurality of windows 331b are provided on the side wall of the head support part 331. This can improve the workability of the worker who replaces the suction pads 332, and can reduce the weight of the head support part 331. With the chuck unit 322 fixed to the drum 321, the pipe 331a communicates with an exhaust pipe 322b that is provided on the drum 321 and connected to a vacuum pump (not shown). At least a portion of the suction pad 332, the suction head 333 and the head support part 331 are made of, for example, resin.

[0027] 6, the appearance inspection device 31 has imaging units 3111 and 3112, an illumination unit 313, and a housing 312 that houses the imaging units 3111 and 3112 and the illumination unit 313. The imaging unit 3111 is, for example, a camera that captures monochrome images, and the imaging unit 3112 is, for example, a camera that captures color images. When the imaging units 3111 and 3112 capture an image of the packaging pack BP held by the chuck unit 322, they generate image information indicating the captured image obtained by capturing the image and output the image information to the control device 90 via a signal line described later.

[0028] As shown in Fig. 8(A), the illumination unit 313 includes light-emitting units 3132A, 3132B, and 3132C, a reflecting member 3133, and a housing 3131 that houses the light-emitting units 3132A, 3132B, and 3132C and the reflecting member 3133. When the packaging pack BP is held by the chuck unit 322, the illumination unit 313 irradiates light emitted from at least one of the light-emitting units 3132A, 3132B, and 3132C toward the side of the packaging pack BP from which the pocket Po1 protrudes. The reflecting member 3133 reflects the light emitted from the light-emitting unit 3132C toward the packaging pack BP held by the chuck unit 322. The light-emitting unit 3132A is an oblique illumination that irradiates light from a direction having a relatively large angle θ1 with respect to the shooting direction (Z direction) of the imaging unit 3111. The light-emitting unit 3132B is a vertical epi-illuminator that irradiates light from a direction substantially parallel to the Z direction at a relatively small angle θ2 with respect to the shooting direction (Z direction) of the imaging unit 3111. The light-emitting unit 3132C is a diffuse illuminator that irradiates a relatively wide range with emitted light reflected by the reflecting member 3133. The light-emitting units 3132A, 3132B, and 3132C each have a first sub-light-emitting unit that irradiates light in the visible wavelength band and a second sub-light-emitting unit that irradiates light in the infrared wavelength band. The light-emitting units 3132A, 3132B, and 3132C can change the ratio of light emitted from the first sub-light-emitting unit and the second sub-light-emitting unit, respectively. The illumination unit 313 operates in a lighting mode suitable for inspecting the work W contained in the packaging pack BP and the printing on the surface of the packaging pack BP by appropriately changing the ratio of light in the visible wavelength band emitted from the light-emitting units 3132A, 3132B, and 3132C to light in the infrared wavelength band, for example, of 700 nm or more.

[0029] The light emitting units 3132A, 3132B, and 3132C may each be capable of adjusting the luminosity of the light emitted toward the packaging pack BP. In this case, the luminosity may be changed depending on, for example, the type of packaging pack BP, the contents of the inspection of the packaging pack BP, and the like. For example, when inspecting the surface condition of the packaging pack BP, the luminosity of the light emitted from the light emitting unit 3132A is set to 5% to 10%, the luminosity of the light emitted from the light emitting unit 3132B is set to 0% to 4%, and the luminosity of the light emitted from the effecting unit 3232C is set to about 40%. Here, for example, when inspecting the engraving of a tablet with an engraving contained in the packaging pack BP, the luminosity of the light emitted from the light emitting unit 3132B is increased to minimize the shadow of the engraving on the tablet. On the other hand, when inspecting a tablet having a rounded shape overall, such as a capsule tablet, the luminosity of the light emitted from the light emitting unit 3132A is increased to make it easier to recognize the shape of the tablet. In addition, when the color of the sheet of the packaging pack BP and the color of the tablets contained in the packaging pack BP are similar, the luminance of the light emitted from the light emitting unit 3132C is reduced and the luminance of the light emitted from the light emitting unit 3132A is increased, making it easier to distinguish the sheet from the tablets. In addition, when inspecting the position or size of the slits on the surface of the packaging pack BP, the luminance of the light emitted from the light emitting unit 3132A is set to 4%, the luminance of the light emitted from the light emitting unit 3132B is set to 80%, and the luminance of the light emitted from the light emitting unit 3132C is set to 20%, making it easier to recognize the slits. In addition, the light emitting unit 3132B has a plurality of first sub-light emitting units, and the accuracy of detection of a relatively narrow slit can be improved by lighting only a part of the first sub-light emitting units.

[0030] Here, the illumination unit 313 operates in any one of a first lighting mode in which the light-emitting unit 3132A is turned on and the light-emitting units 3132B and 3132C are turned off, as shown in FIG. 8(A), a second lighting mode in which the light-emitting units 3132A and 3132C are turned off and the light-emitting unit 3132B is turned on, as shown in FIG. 8(B), or a third lighting mode in which the light-emitting units 3132A and 3132B are turned off and the light-emitting unit 3132C is turned on, as shown in FIG. 9. 8(A) and 9, when the illumination unit 313 operates in the first lighting mode or the third lighting mode, light L11, L31 is irradiated from the light-emitting unit 3132A toward the packaging pack BP, and the proportion of diffuse reflected light L13, L32 from the packaging pack BP that enters the imaging units 3111, 3112 is greater than the proportion of specular reflected light L12 from the packaging pack BP that enters the imaging units 3111, 3112. On the other hand, when the illumination unit 313 operates in the second lighting mode, light L21 is irradiated from the light-emitting unit 3132B toward the packaging pack BP, and the proportion of diffuse reflected light from the packaging pack BP that enters the imaging units 3111, 3112 is smaller than the proportion of specular reflected light L22 that enters the imaging units 3111, 3112, as shown in FIG. Here, the average angle of the first angle θ1 formed between the optical axes J1, J2 of the imaging units 3111, 3112 and the irradiation direction of light L11 irradiated from the light-emitting unit 3132A toward the packaging pack BP held by the chuck unit 322 is larger than the average angle of the second angle θ2 formed between the aforementioned optical axes J1, J2 and the irradiation direction of light L21 irradiated from the light-emitting unit 3132B toward the packaging pack BP held by the chuck unit 322.

[0031] When the illumination unit 313 operates in the first lighting mode, the imaging unit 3112 captures a color image, for example, as shown in FIG. 10(A), and the imaging unit 3111 captures a monochrome image, for example, as shown in FIG. 10(B). As shown in FIGS. 10(A) and (B), when the illumination unit 313 operates in the first lighting mode and the third lighting mode, an image in which the work W stored inside the pocket Po1 is clearly captured can be captured. On the other hand, when the illumination unit 313 operates in the second mode, the imaging unit 3112 captures a color image, for example, as shown in FIG. 11(A), and the imaging unit 3111 captures a monochrome image, for example, as shown in FIG. 11(B). As shown in FIGS. 11(A) and (B), when the illumination unit 313 operates in the second lighting mode, an image in which the surface state of the packaging pack BP, that is, the surface of the pocket Po1 and the slit SL1, are clearly captured can be captured. The imaging units 3111 and 3112 output to the control device 90 image information indicating an image obtained by imaging the packaging pack BP.

[0032] 6, the pack conveying device 33 includes a belt 331, pulleys 332, 333, and 334 around which the belt 331 is wound, and a pulley drive unit 335 that drives the pulley 332 at a preset rotation speed. The pack conveying device 33 is disposed such that a portion of the belt 331 that is mounted on the pulleys 333 and 334 faces the rotary suction 32 from below in the vertical direction. When the rotary suction 32 releases the chuck 322a of the chuck unit 322 disposed at the transfer position described above, the packaging pack BP held by the chuck unit 322 falls onto the belt 331 and is transferred to the pack conveying device 33. The pack conveying device 33 moves the belt 331 as shown by the arrow AR41 to convey the packaging pack BP placed on the belt 331 to a subsequent process.

[0033] Returning to Fig. 1, the control device 90 includes a computer having, for example, a CPU (Central Processing Unit) and a storage device. The control device 90 is connected to the imaging units 3111, 3112 and the illumination unit 313 of the appearance inspection device 31, the film position change units 26, 283, and the drum drive unit 323 and the chuck unit 322 of the rotary suction 32 via bus signal lines (not shown). The CPU of the control device 90 executes a program previously stored in the storage device, thereby functioning as an imaging control unit 911, an illumination control unit 912, an image acquisition unit 913, a work appearance judgment unit 914, a transport control unit 915, a slit position calculation unit 916, a pocket position calculation unit 917, and a position adjustment unit 918, as shown in Fig. 12. The storage device also has an image storage unit 931 that stores image information indicating the captured images captured by the imaging units 3111 and 3112 of the appearance inspection device 31, a work appearance judgment criterion storage unit 932 that stores information indicating judgment criteria in the appearance inspection of the work, and a judgment result storage unit 933 that stores the judgment result. Furthermore, the storage device has a position standard storage unit 934 that stores position standard information indicating standards for the positions of the slits of the packaging pack BP and the position of the pocket Po1.

[0034] The imaging control unit 911 notifies the illumination control unit 912 of lighting mode information indicating a lighting mode when lighting the light-emitting units 3132A, 3132B, and 3132C of the illumination unit 313, and then outputs a control signal to the imaging unit 3111 or the imaging unit 3112 via a signal line. As a result, the imaging unit 3111 or the imaging unit 3112 performs imaging of the packaging pack BP held by the chuck unit 322 based on the input control signal. When the lighting mode information is input from the imaging control unit 911, the illumination control unit 912 generates a control signal for lighting the light-emitting units 3132A, 3132B, and 3132C in the first lighting mode, the second lighting mode, or the third lighting mode indicated by the input lighting mode information, and outputs the control signal to the light-emitting units 3132A, 3132B, and 3132C. As a result, the illumination unit 313 lights up the light-emitting units 3132A, 3132B, and 3132C in the first, second, or third lighting mode based on the input control signal. In addition, the illumination control unit 912 notifies the image acquisition unit 913 of lighting mode identification information for identifying the selected lighting mode. After the imaging control unit 911 outputs a control signal to the imaging units 3111 and 3112, the image acquisition unit 913 receives image information from the imaging units 3111 and 3112 and stores the input image information in the image storage unit 931 in association with the lighting mode identification information notified by the illumination control unit 912.

[0035] When the image information stored in the image storage unit 931 is stored in association with the lighting mode identification information indicating the first lighting mode, the work appearance determination unit 914 acquires the image information. Then, based on the information stored in the work appearance determination criterion storage unit 932 and the acquired image information, the work appearance determination unit 914 judges whether the appearance of the work contained in the pocket Po1 of the packaging pack BP corresponding to the image information is normal or not. The work appearance determination unit 914 stores the judgment result in the judgment result storage unit 933. The transport control unit 915 generates a control signal for rotating the drum 321 of the rotary suction 32 and outputs it to the drum drive unit 323 of the rotary suction 32. In addition, the transport control unit 915 generates a control signal for causing the chuck unit 322 of the rotary suction 32 to adsorb or release the packaging pack BP, and outputs it to the chuck unit 322. The transport control unit 915 refers to the information indicating the determination result stored in the determination result storage unit 933, and when the determination result is abnormal, outputs a control signal to the drum driving unit 323 to cause the drum driving unit 323 to rotate the chuck unit 322 holding the packaging pack BP determined to be abnormal from the imaging position Pos2 to the collection position Pos3. Next, the transport control unit 915 outputs a control signal to the chuck unit 322 holding the packaging pack BP determined to be abnormal, thereby releasing the holding of the packaging pack BP. This allows the packaging pack BP to be collected by the collection unit described above.

[0036] The slit position calculation unit 916 acquires image information when the image information stored in the image storage unit 931 is stored in association with lighting mode identification information indicating the second lighting mode. Then, the slit position calculation unit 916 calculates the position of the slit with respect to a preset reference position in the packaging pack BP (for example, the periphery of the packaging pack BP) based on the acquired image information. Then, the slit position calculation unit 916 notifies the position adjustment unit 918 of slit position information indicating the calculated position of the slit. Also, the pocket position calculation unit 917 calculates the position of the pocket Po1 with respect to a preset reference position in the packaging pack BP (for example, the periphery of the packaging pack BP) based on the acquired image information. Then, the pocket position calculation unit 917 notifies the position adjustment unit 918 of pocket position information indicating the calculated position of the pocket Po1. The position adjustment unit 918 refers to the information stored in the position standard storage unit 934 to calculate the amount of deviation of the position of the slit indicated by the notified slit position information from the preset standard center position of the slit, and the amount of deviation and the direction of deviation of the position of the pocket Po1 indicated by the notified pocket position information from the preset standard center position of the pocket Po1. The position adjustment unit 918 also determines whether the calculated amount of deviation is less than the preset deviation amount threshold. When the position adjustment unit 918 determines that the amount of deviation is equal to or greater than the above-mentioned deviation amount threshold, it outputs a control signal to the guide drive unit 2832 of the film position change unit 283 and the guide drive unit 264 of the film position change unit 26 to adjust the positions of the pack film F4 in the slit forming device 171 and the punching device 173 so as to eliminate the amount of deviation of the pocket Po1 and the slit.

[0037] Here, the appearance judgment and position adjustment process executed by the control device 90 will be described with reference to Fig. 12. First, the transport control unit 915 controls the drum driving unit 323 to rotate the drum 321, thereby positioning the chuck unit 322 holding the packaging pack BP to be inspected at the above-mentioned imaging position Pos2 (step S101). Next, the illumination control unit 912 operates the illumination unit 313 in a first illumination mode in which the light-emitting unit 3132A is turned on and the light-emitting units 3132B and 3132C are turned off, or in a third illumination mode in which the light-emitting unit 3132C is turned on and the light-emitting units 3132A and 3132B are turned off (step S102). Next, the imaging control unit 911 controls the imaging units 3111 and 3112 to cause the imaging unit 3112 to capture a color image for visual inspection of the workpiece W contained in the pocket Po1 (step S103), and then causes the imaging unit 3111 to capture a monochrome image for visual inspection of the workpiece W (step S104). At this time, when image information is input from the imaging units 3111 and 3112, the image acquisition unit 913 stores the input image information in the image storage unit 931 in association with lighting mode identification information that identifies the lighting mode of the corresponding lighting unit 313. Thereafter, the workpiece appearance determination unit 914 determines that the image information stored in the image storage unit 931 is stored in association with lighting mode identification information indicating the first lighting mode, and determines whether the appearance of the workpiece contained in the pocket Po1 of the packaging pack BP corresponding to the image information is normal based on the information stored in the workpiece appearance determination criterion storage unit 932 and the image information stored in the image storage unit 931. Then, the work appearance judgment unit 914 stores information indicating the judgment result in the judgment result storage unit 933 (step S105).

[0038] Next, the illumination control unit 912 operates the illumination unit 313 in a second illumination mode in which the light-emitting unit 3132A is turned off and the light-emitting units 3132B and 3132C are turned on (step S106). Next, the imaging control unit 911 controls the imaging units 3111 and 3112 to capture a color image for calculating the position of the slit of the packaging pack BP and the position of the pocket Po1 by the imaging unit 3112 (step S107), and then captures a monochrome image for calculating the position of the slit of the packaging pack BP and the position of the pocket Po1 by the imaging unit 3111 (step S108). Thereafter, the slit position calculation unit 916 and the pocket position calculation unit 917 calculate the slit position and the pocket position based on the captured color image and monochrome image, respectively (step S109). Next, the position adjustment unit 918 refers to the information stored in the position standard storage unit 934 to calculate the amount of deviation of the position of the slit indicated by the slit position information from the preset standard center position of the slit, and the amount of deviation and the direction of deviation of the position of the pocket Po1 indicated by the notified pocket position information from the preset standard center position of the pocket Po1 (step S110). Next, the illumination control unit 912 controls the illumination unit 313 to turn off the light emitting unit 3132B (step S111). After that, the position adjustment unit 918 judges whether the calculated amount of deviation |d1| is equal to or greater than the preset amount of deviation threshold |d1|th (step S112). Here, when the control device 90 judges that the calculated amount of deviation |d1| is less than the preset amount of deviation threshold |d1|th (step S112: No), the process of step S101 is executed again. On the other hand, when the control device 90 determines that the calculated misalignment amount |d1| is equal to or greater than the preset misalignment amount threshold |d1|th (step S112: Yes), it adjusts the position of the pack film F4 based on the calculated misalignment amount and direction (step S113). Specifically, the position adjustment unit 918 controls the guide drive unit 2832 of the film position change unit 283 and the guide drive unit 264 of the film position change unit 26 based on the calculated misalignment amount and direction to adjust the positions of the pack film F4 in the slit forming device 171 and the punching device 173 so that the misalignment amount of the pocket Po1 and the slit is less than the misalignment amount threshold |d1|th. Next, the process of step S101 is executed again.

[0039] As described above, according to the packaging machine of this embodiment, the chuck unit 322 suction-holds the packaging pack BP at multiple locations with the multiple suction pads 332, so that it is possible to prevent the entire packaging pack BP from becoming warped (curved). The illumination unit 313 is in one of a first lighting mode or a third lighting mode in which the light-emitting unit 3132A or the light-emitting unit 3132C is turned on so that the proportion of diffuse reflected light incident on the imaging units 3111, 3112 is greater than the proportion of specular reflected light incident on the imaging units 3111, 3112, and a second lighting mode in which the light-emitting unit 3132B is turned on so that the proportion of diffuse reflected light incident on the imaging units 3111, 3112 is smaller than the proportion of specular reflected light incident on the imaging units 3111, 3112. With this arrangement, by setting the illumination unit 313 to the first lighting mode or the third lighting mode while the packaging pack BP is held by the chuck unit 322, the imaging units 3111 and 3112 can capture an image in which the work W contained in the pocket Po1 of the packaging pack BP is more clearly reflected than the surface and peripheral portion of the pocket Po1 of the packaging pack BP. Also, by setting the illumination unit 313 to the second lighting mode, the imaging units 3111 and 3112 can capture an image in which the surface and peripheral portion of the pocket Po1 of the packaging pack BP are more clearly reflected than the work W. Therefore, in one appearance inspection device 31, the appearance inspection of the work W and the inspection of the outer shape, pocket position, etc. of the packaging pack BP can be performed simply by switching the lighting mode of the illumination unit 313, so that the number of appearance inspection devices 31 required for the packaging machine can be reduced, and the packaging machine can be made smaller accordingly.

[0040] Furthermore, in the packaging machine according to this embodiment, the appearance inspection device 31 captures two types of images, a color image and a monochrome image. This makes it possible to handle inspections that are difficult to judge using only monochrome images, such as inspections of relatively light-colored foreign objects, tablets of different colors, and printing positions. On the other hand, it is also possible to handle inspections that are best judged using monochrome images, such as defective sealing of sheets in packaging packs BP (for example, the mesh of the sheet is floating away from the main body of the packaging pack BP).

[0041] However, in the case of a configuration including a plurality of visual inspection devices 31, it is necessary to secure an installation space, and since inspections are repeatedly performed by the plurality of visual inspection devices 31, the time required for the inspection process increases, and there is a risk of a decrease in the production efficiency of the packaging packs BP. In addition, it is required to accurately inspect the misalignment of the slit portion by clearly distinguishing the various characters, patterns, etc. printed on the packaging packs BP from the slit portion for separating the packaging packs BP. In response to this, in the visual inspection device 31 according to the present embodiment, the illumination unit 313 can operate in a lighting mode suitable for each of the various types of inspections, including the inspection of the misalignment of the slit portion in the various types of packaging packs BP. This allows the space of the entire device to be saved, and allows the various types of inspections, including the inspection of the misalignment of the slit portion in the various types of packaging packs BP, to be performed with high accuracy.

[0042] The rotary suction 32 according to this embodiment includes a chuck unit 322 that holds the packaging pack BP, and a drum 321 and drum drive unit 323 that position the chuck unit 322 at any one of the receiving position Pos1, the imaging position Pos2, and the transfer position Pos3 described above. The imaging position and the transfer position are aligned in the vertical direction. This allows the length of the packaging machine in the Y-axis direction to be shortened compared to a packaging machine in which, for example, the imaging position where the appearance inspection device 31 images the packaging pack BP and the transfer position where the packaging pack BP is transferred to the pack conveying device 33 are aligned in the Y-axis direction. This allows the packaging machine to be made more compact.

[0043] Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the above-mentioned embodiments. For example, the appearance inspection device 31 may be provided with a switching unit that switches the lighting mode of the illumination unit 313 and the transfer destination of image information indicating a captured image at a relatively high speed. In this case, the tact time in the inspection process can be shortened.

[0044] In the embodiment, for example, a chuck unit 2322 that holds a packaging pack BP as shown in Fig. 14 may be included. The chuck unit 2322 has two holders 23221 that hold the packaging pack BP, and each of the two holders 23221 has a main body 23221a, a plurality of (three in Fig. 14) extension pieces 23221b extending from the main body 23221a, and suction pads 2321c disposed at the tip of each of the extension pieces 23221b. The chuck unit 2322 suctions and holds the packaging pack BP at the tip of the extension pieces 23221b.

[0045] In an embodiment, the chuck unit may have a mounting table on which the packaging pack BP is placed, and a pressing member formed in a plate shape from a material transparent to visible light and infrared light, having an opening formed in a portion facing the pocket Po1 in the packaging pack BP placed on the mounting table, and pressing portions of the packaging pack BP other than the pocket Po1 while fixed to the mounting table.

[0046] In the embodiment, an example in which the packaging machine is equipped with the rotary suction 32 has been described, but the present invention is not limited to this, and the packaging machine may be equipped with a packaging pack conveying device 3032 instead of the rotary suction 32, for example, as shown in Fig. 15. The packaging pack conveying device 3032 has a conveying belt 3321 to which a plurality of chuck units 3322 are attached, and a driving unit 3323 that drives the conveying belt 3321. [Industrial Applicability]

[0047] The present invention is suitable for producing pack films for packaging tablets, medical devices, and the like. [Explanation of symbols]

[0048] 11: raw film supply unit, 12: forming device, 14: sealing device, 15: cover film supply unit, 17: slit forming and punching unit, 26, 283: film position change unit, 29: heating device, 31: appearance inspection device, 32: rotary suction, 33: pack conveying device, 39: scrap collection unit, 332, 333, 334: pulley, 49: reversing unit, 50: work supply device, 51: hopper, 53, 521: work feeder, 54: coil chute, 70: stage, 90: control device, 99: packaging device body, 111, 112, 151: reel, 117, 252, 291, 292: tension application unit, 121: device body, 122: second mold, 122a: plug, 123: first mold, 123a: recess, 124, 125, 172: drive unit, 132, 312, 1723: housing, 141, 1162: conveying unit, 141a, 251a, 261a: wheel, 141d: support shaft, 142: pressing unit, 171: slit forming device, 173: punching device, 231: fixed chuck, 232: chuck feed, 241, 25 1,261: guide roller, 242,253,1152,1153,1155,1162a,1165,1171,1441,1521,2521,2821,2911: roller, 251b,261b,2811b: shaft, 281: conveying section, 263: roller support section, 264: guide drive section, 1712,1732: die unit, 282: film pressing section, 293: sliding guide, 312,3131: housing, 313: lighting section, 321: drum, 322: chuck unit, 322b: exhaust pipe, 323: door Ram drive unit, 331: head support unit, 331a, 333a: tube, 331b: window, 332: suction pad, 333: suction head, 331: belt, 335: pulley drive unit, 2812: roller drive unit, 1173: support unit, 1421: heat transfer roller, 2922: powder clutch brake, 1711, 1731: main body unit, 1713: head support unit, 1714, 1734: head, 1714a: cutter, 1735: punching cutter, 1737: scrap cutting cutter, 1716, 1736a: guide rod, 1717,1736b: power transmission arm, 1721: slit forming device drive unit, 1722: punching device drive unit, 1732a: opening, 1739: guide member, 2811: film feed roller, 2831: film guide, 2832: guide drive unit, 2901, 2902: heat transfer plate, 2903, 2904: drive unit, 3111, 3112: imaging unit, 3132A, 3132B: light emitting unit, 3133: reflecting member, 17321, 17341: base, BP: packaging pack, F1: raw material film, F2: container film, F3: cover film, F4: pack film, F5: scrap, Po1: pocket, Pos1: receiving position, Pos2: imaging position, Pos3: recovery position, Pos4: transfer position, SL1: slit,

Claims

1. 1. A visual inspection device for inspecting the visual appearance of a packaging pack having a container film in which a pocket for accommodating a workpiece is formed and a cover film attached to the container film so as to cover the pocket, an imaging section that images the packaging pack held by a chuck unit having a plurality of suction pads and that suction-holds a plurality of points on the cover film side of the packaging pack; an illumination unit having a plurality of light-emitting units, and irradiating light emitted from at least one of the plurality of light-emitting units toward a side of the container film opposite to the cover film side while the packaging pack is held by the chuck unit; the illumination unit operates in one of a plurality of lighting modes having different ratios between diffuse reflected light emitted from at least one of the plurality of light-emitting units, diffused by the packaging pack, and then incident on the imaging unit, and regular reflected light emitted from at least one of the plurality of light-emitting units, reflected by the packaging pack, and then incident on the imaging unit; Visual inspection equipment.

2. The illumination unit operates in at least a first lighting mode in which at least one first light-emitting unit selected from among the plurality of light-emitting units so that a ratio of diffuse reflected light incident on the imaging unit is larger than a ratio of specular reflected light incident on the imaging unit is turned on, and a second lighting mode in which at least one second light-emitting unit selected from among the plurality of light-emitting units so that a ratio of diffuse reflected light incident on the imaging unit is smaller than a ratio of specular reflected light incident on the imaging unit is turned on. The visual inspection apparatus according to claim 1.

3. an average angle of a first angle between an optical axis of the imaging unit and an irradiation direction of light irradiated from the at least one first light-emitting unit toward the packaging pack held by the chuck unit is larger than an average angle of a second angle between an optical axis of the imaging unit and an irradiation direction of light irradiated from the at least one second light-emitting unit toward the packaging pack held by the chuck unit; The visual inspection apparatus according to claim 2.

4. A packaging machine for manufacturing a packaging pack having a container film having a pocket for accommodating a workpiece and a cover film attached to the container film so as to close the pocket, a raw film supply unit for supplying a strip-shaped raw film that is the base of the container film; a forming device for forming the pockets in the raw film supplied from the raw film supply unit to generate the belt-shaped container film; A work supply device that supplies a work to the pocket; a cover film supplying unit for supplying the band-shaped cover film; a sealing device that attaches the cover film to the container film while a work is accommodated in the pocket of the container film to generate a pack film in which the pocket is sealed with the cover film; a punching device for punching the packaging pack from the packing film; an appearance inspection device that inspects the appearance of the packaging pack punched by the punching device; a pack conveying device that conveys the packaging pack, The pack conveying device is a chuck unit having a plurality of suction pads and configured to suction and hold a plurality of points on the cover film side of the packaging pack; The appearance inspection device includes: an imaging unit that images the packaging pack held by the chuck unit; an illumination unit having a plurality of light-emitting units, and irradiating light emitted from at least one of the plurality of light-emitting units toward a side of the container film opposite to the cover film side while the packaging pack is held by the chuck unit; and an illumination control unit that operates the illumination unit in one of a plurality of lighting modes having different ratios of diffuse reflected light emitted from at least one of the plurality of light-emitting units, diffused by the packaging pack, and then incident on the imaging unit, and regular reflected light emitted from at least one of the plurality of light-emitting units, reflected by the packaging pack, and then incident on the imaging unit. packaging machine.

5. The pack conveying device is a drum having a cylindrical shape and at least one of the chuck units disposed on a periphery thereof; and a drum driving unit that rotates the drum to position the chuck unit at least at one of a receiving position for receiving the packaging pack from the punching device and an imaging position for imaging the packaging pack held by the chuck unit by the appearance inspection device.

5. The packaging machine according to claim 4.

Images