WO2019048114A1 - Dispositif d'inspection et procédé pour détecter des corps étrangers dans des récipients - Google Patents

Dispositif d'inspection et procédé pour détecter des corps étrangers dans des récipients Download PDF

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Publication number
WO2019048114A1
WO2019048114A1 PCT/EP2018/069098 EP2018069098W WO2019048114A1 WO 2019048114 A1 WO2019048114 A1 WO 2019048114A1 EP 2018069098 W EP2018069098 W EP 2018069098W WO 2019048114 A1 WO2019048114 A1 WO 2019048114A1
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WO
WIPO (PCT)
Prior art keywords
containers
transport
container
acceleration section
inspection device
Prior art date
Application number
PCT/EP2018/069098
Other languages
German (de)
English (en)
Inventor
Konrad Senn
Paul Vogt
Original Assignee
Krones Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krones Ag filed Critical Krones Ag
Publication of WO2019048114A1 publication Critical patent/WO2019048114A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9009—Non-optical constructional details affecting optical inspection, e.g. cleaning mechanisms for optical parts, vibration reduction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9018—Dirt detection in containers
    • G01N21/9027—Dirt detection in containers in containers after filling
    • 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
    • B65G54/00—Non-mechanical conveyors not otherwise provided for
    • B65G54/02—Non-mechanical conveyors not otherwise provided for electrostatic, electric, or magnetic

Definitions

  • the invention relates to an inspection device and a method for detecting foreign bodies in containers having the features of the preamble of claims 1 and 13, respectively.
  • the containers are transported by a transport device along a transport path and thereby inspected for foreign bodies in the containers.
  • DE 690 05 069 T2 discloses a device for detecting foreign substances in vessels, wherein on carousel several receptacles are arranged for vessels that can be rotated in pairs with a rotating mechanism in a forward or reverse direction.
  • the vessels are first set in a forward rotation, whereby the contents and the foreign matter also rotate in the forward direction. Then the rotation is stopped and the vessel is set in reverse rotation.
  • the foreign substances collect in the center of the vessel and can be detected there with video cameras.
  • control motors and controllers are placed on the carousel to rotate the pickups.
  • US 2001/0033372 A1 proposes a device for optical inspection of containers with liquids, in which the foreign substances are set in motion by means of a vibration device and detected by means of a visual inspection.
  • Object of the present invention is therefore to provide an inspection device, can be reliably detected with the foreign body in containers and is less expensive and therefore less expensive.
  • the inspection device for detecting foreign bodies in containers with the features of claim 1 ready.
  • Advantageous embodiments of the invention are mentioned in the subclaims.
  • the inspection device according to the invention is characterized in that the transport device comprises at least one acceleration section, which is designed to accelerate and / or decelerate the containers in each case transversely to their longitudinal axes. By accelerating or decelerating the contents of the container is moved accordingly, with any foreign bodies contained therein move relative to the container.
  • at least one camera is arranged on the transport device in such a way that at least two camera images can be picked up during transportation of the containers.
  • the container to be inspected is accelerated and / or decelerated with the accelerating portion between exposures of the camera images, the foreign matters moving therein appear at different positions of the two camera images. As a result, the foreign bodies, for example with an image processing unit, can be reliably detected.
  • the inspection device can be arranged in a beverage processing plant.
  • the inspection device may be upstream and / or downstream of a container treatment machine.
  • the container handling machine may be, for example, a container manufacturing facility (eg, a stretch blow molder), a container recycling facility, a rinser, a sorter, a filler, a capper, and / or a packaging machine.
  • the foreign matter recognition inspection device may be disposed downstream of a filler for dispensing a product into the containers and a capper for applying seals to the containers. It is also conceivable that the inspection device is associated with a sorting device for reusable bottles or a modular control device for filling height inspection or closure inspection.
  • the containers may be intended to contain drinks, toiletries, pastes, chemical, biological and / or pharmaceutical products.
  • the containers may be plastic bottles, glass bottles, cans and / or tubes.
  • Plastic containers may in particular be PET, PEN, HDPE or PP containers or bottles.
  • they may be biodegradable containers or bottles, the main components of which are derived from renewable raw materials, e.g. Sugarcane, wheat or corn.
  • the containers may be filled with a product and / or provided with a closure.
  • Foreign substances here may preferably be granular bodies, for example broken glass, sand and / or residues of cleaning agents or the like.
  • the transport device for transporting the containers along the transport path may comprise a conveyor belt and / or a carousel.
  • the axis of rotation of the carousel may be directed substantially vertically, ie to the center of the earth.
  • the transport device can container container include, with which the containers are each recorded and accelerated in the acceleration section and / or decelerated.
  • the longitudinal axis of the container may be the axis to which the container is rotationally symmetrical.
  • the longitudinal axis of the container may also be the axis connecting the center of the container mouth to the center of the container bottom.
  • the acceleration section may be designed to accelerate and / or decelerate the containers transversely and / or along the transport path.
  • the at least one camera may be part of an optical measuring head.
  • the at least one camera may be formed with a CCD or CMOS sensor.
  • the at least one camera can be designed as a line or matrix camera.
  • the at least one camera may be arranged such that during the inspection it detects the container bottom from below and / or obliquely from above through the side wall of the container. It is also conceivable that the at least one camera is arranged such that during the inspection it detects the container bottom through the container mouth.
  • two or more cameras are arranged at intervals to each other on the transport device stationary, preferably in the region of the acceleration section.
  • the at least two camera images can each be picked up by one of the cameras, with the stationary arrangement making the alignment of the cameras with the containers particularly simple and stable.
  • the two or more cameras may be arranged along the transport path of the conveyor, with the containers therebetween being accelerated and / or decelerated by the acceleration section.
  • the at least one camera with the container to be inspected is arranged to follow the transport device, preferably in the region of the acceleration section.
  • each container receptacle of the transport device is associated with a camera to detect any foreign matter in the container received therein.
  • the at least one camera is moved by a moving unit which is designed to carry the camera along the transport path synchronized with the movement of the container to be inspected and optionally to return it to an initial position after the inspection. As a result, fewer cameras must be used on the inspection device.
  • a camera image is first taken of a container during the inspection, the container is accelerated and then another camera image is taken. To- Additionally or alternatively, another camera image can be taken after braking the container again. Then the camera images can be compared and the moving foreign bodies can be determined.
  • the inspection device may comprise a machine control and / or an image processing unit in order to control the transport device, in particular the acceleration section and / or the camera images with the cameras and / or to evaluate the camera images for detecting the foreign bodies.
  • the image processing unit may be integrated in the machine control or designed separately therefrom. It is also conceivable that the image processing unit is arranged offset from the inspection device via a data connection.
  • the transport device may comprise a linear drive with individual controllable gripper carriages for individual acceleration and / or deceleration of the containers in the acceleration section.
  • the linear drive may comprise one or more linear stators, on each of which a plurality of the controllable gripper carriages are arranged, which are preferably each accelerated and / or braked via a magnetic field control.
  • the gripper carriages can each be formed at least as part of a container receptacle. It is conceivable here that two opposite gripper carriages cooperate as container receptacle.
  • the one or more linear stators may each comprise a plurality of preferably individually controllable coil elements in order to generate a magnetic field for the gripper carriages. The coil elements can be arranged sequentially in the direction of the transport path one after the other.
  • the linear drive can comprise two stator segments for driving the gripper carriages, on which the gripper carriages are arranged in pairs opposite one another in the region of the acceleration section.
  • the containers can be picked up particularly easily from two sides by the gripper carriages and accelerated or braked independently of each other in the acceleration section.
  • the two stator segments are arranged parallel and at a distance from each other, wherein the gripper carriages receive in pairs a container in between.
  • the stator segments can each be designed as self-contained transport path, so that the gripper carriage can be returned to a receiving position for receiving a further container after releasing a container.
  • the gripper carriages can each be designed with driven rollers on a gripper for rotating the containers.
  • the containers can be used in addition to the acceleration or deceleration movement are also rotated. Consequently, the foreign bodies are offset by the combined rotation and acceleration or Abbremsterrorism stronger against the container walls and are characterized even more reliable recognizable.
  • each gripper carriage is formed with a two-armed gripper, wherein a roller is formed on each arm for contact with the container. Now, if a container is detected with two opposite gripper carriage, where he is reliably held or rotated a total of four driven rollers
  • the rollers can each be driven by a single electric motor.
  • the rollers can be driven via a toothing or a magnetic tape along the acceleration section.
  • the toothing can be formed here with a steadily decreasing tooth spacing for accelerating the rollers and / or with a steadily increasing tooth spacing for braking the rollers.
  • the toothing may be formed as a linear toothing along the transport path, which engages in corresponding gears of the rollers.
  • the magnetic tape may be used which is formed with alternating north and south poles. The distance between the north and south poles can be shortened to accelerate the roles steadily. In contrast, the distance between the north and south poles to slow down the roles can steadily increase.
  • the rollers can also be formed with magnetic elements to tap the forces of the magnetic tapes.
  • the magnetic tapes can be arranged parallel to the transport path. So move the rollers with their magnetic elements along the magnetic tape, they are rotated accordingly.
  • the linear drive comprises a preferably driven belt and a stator segment opposite thereto for driving the gripper carriages, wherein the gripper carriages are formed with rollers for the simultaneous transport and unwinding of the containers on the belt.
  • the containers can be in contact with the band from one side and with one gripper carriage on the other side. Now move the gripper carriage along the conveyor belt, the containers are rolled on the tape. As a result, the cost of simultaneously accelerating or decelerating and rotating the container is even lower.
  • the container is initially rotated and accelerated faster and faster by the unwinding on the belt when the gripper carriages are accelerated.
  • the container is then turned slower and slower until it finally stops spinning and can be transferred to a transport segment after the acceleration section. It is also conceivable that the containers are accelerated with the gripper carriage to a maximum speed and that the belt moves at this maximum speed. As a result, the containers rotate in different directions during acceleration and deceleration.
  • the transport device may comprise a plurality of transport segments with different curvatures of the transport path, so that the containers in the acceleration section are accelerated and / or decelerated transversely to the transport path due to the radial acceleration acting differently in the transport segments.
  • the containers can be moved at a constant speed in the transport device, the inertial forces acting transversely to the transport path. Consequently, the foreign bodies are moved by these transverse forces against the containers and can be recognized by the inclusion of the two camera images.
  • the transport device can be built so easy.
  • two adjoining transport segments are formed by a linear conveyor and a star wheel conveyor.
  • the linear conveyor so initially no centrifugal forces and the containers are accelerated only after the transfer to the Sternrad prepare leaps and bounds by the acting centrifugal forces transversely to the transport path.
  • the foreign bodies are moved relative to the container.
  • connect to the star wheel conveyor another linear conveyor and / or another star wheel with opposite direction of rotation.
  • the foreign bodies in the two star wheel conveyors are accelerated in a different direction transversely to the transport path. Consequently, the foreign matters can be recognized even more reliably.
  • the two star wheel conveyor can be arranged directly adjacent to each other. Through the use of two counter-rotating star wheel conveyors, it is possible to transport the containers before and after the inspection in the same direction of transport.
  • the transport device may comprise a cam or a parting delay star.
  • container receptacles may be attached to the cam, so that the containers are moved according to the introduced into the cam track.
  • the pitch delay star may include a star wheel assembly having circumferentially regularly spaced hinges on each of which the container assemblies are mounted. taken over rotatable arms are affiliated. Due to the rotation of the star wheel arrangement and the additional rotation of the arms, the containers are accelerated or decelerated in addition to the circular movement.
  • Individually controllable servomotors for rotating the arms can be arranged on the joints. It is also conceivable that the arms are rotated via a control disk or the like.
  • the transport device may comprise a transport segment with forced guidance of the containers, in particular with a crank, or an irregularly geared transmission for accelerating and / or decelerating the containers. Due to the positive guidance of the container they can be accelerated or decelerated independently of the transport movement.
  • the positive guide comprise a trained as a rail stop, which is arranged transversely to an incoming conveyor belt. As a result, the transport of the respective container is stopped by the impact on the rail and can then be continued along the stop with the sliding crank or the irregularly translated gear by an acceleration and / or deceleration.
  • a slider may be arranged, with which the containers are moved along the stop.
  • a further conveyor belt can be formed with which the containers are transported further after acceleration or deceleration.
  • the at least one camera can be arranged along the transport segment with the positive guidance. Due to the positive guidance, the containers can be accelerated or braked independently of the transport movement with a particularly low outlay. It is also conceivable that a container receptacle is arranged on the sliding crank or the unevenly translated transmission, with which the containers are received in the acceleration section. Thrust crank may here mean that this is a rotatable disc to which a connecting rod is affiliated to translate the circular motion into a linear motion.
  • the invention provides a method for the detection of foreign objects in containers with the features of claim 13 to the problem.
  • Advantageous embodiments of the invention are mentioned in the subclaims.
  • the containers can be accelerated and / or braked in the acceleration section parallel and / or transversely to a transport direction of the transport device. Since the containers are usually transported transversely to their longitudinal axes in the transport device, so the implementation of acceleration and deceleration is particularly simple. For example, in addition to a transport speed predetermined in the system, the containers can be accelerated in the acceleration section and then braked again so that the foreign bodies move in relation to the containers. In addition, the containers can be moved on a circular path at a constant transport speed and thus accelerated transversely to the transport direction. As a result of the movement of the containers on the circular path, centrifugal forces therefore act, as a result of which the foreign bodies are also accelerated relative to the container. Consequently, the structure of the acceleration section is particularly simple.
  • the containers can be accelerated in the acceleration section from an original transport speed and then decelerated again or vice versa, so that they are transported by the transport device again at the original transport speed after passing through the acceleration section.
  • the containers have the same speed before and after the inspection, which preferably coincides with a line speed.
  • the containers do not have to be synchronized with the rest of the system via a buffer after the inspection.
  • the method for detecting foreign bodies may also comprise the features mentioned above with respect to the inspection device corresponding to individual or arbitrary combinations.
  • the method according to claims 13-15 can be carried out with an inspection device according to any one of claims 1-12.
  • Figure 1 is a schematic representation of an embodiment of the inspection device for detecting foreign bodies in containers in a side view.
  • 2 shows a further exemplary embodiment of the inspection device in a plan view, wherein the transport device comprises a linear drive with individual controllable gripper carriages;
  • FIG. 3 shows a further exemplary embodiment of the inspection device in a plan view, wherein the transport device comprises a linear drive with a driven belt and a stator segment opposite thereto with driven gripper carriages;
  • the transport device comprises a linear drive with individual controllable gripper carriages and rollers for rotating the containers;
  • FIG. 5 shows a further embodiment of an inspection device in a plan view, wherein the transport device comprises a plurality of transport segments with different curvatures of the transport path;
  • FIG. 6 shows a further exemplary embodiment of an inspection device in a plan view, wherein the transport device for braking and / or accelerating the containers in the acceleration section comprises a cam disk;
  • Fig. 7 shows a further embodiment of the inspection device in a plan view, wherein the transport device comprises a transport segment with a positive guide.
  • FIG. 1 shows a schematic illustration of an inspection device 100 for detecting foreign bodies in the containers 2 in a lateral view.
  • the foreign bodies may here be, for example, broken glass or the like, which are caused by damage to the container 2.
  • the container 2 can already be filled with a product and / or closed. It can be seen that the containers are transported by the transport device 30 along a transport path in the transport direction T. The containers 2 are thereby transported linearly with the container receptacles 31 along the rails 32.
  • the acceleration section 40 is designed to accelerate and / or decelerate the containers 2 in each case transversely to their longitudinal axes L. This can be done in the direction and / or transversely to the transport direction T.
  • three cameras 50 ', 50 "and 50"' are arranged at intervals to one another. They are designed as a matrix camera with a CCD sensor, but it is also conceivable that the cameras are designed as a line scan camera and / or comprise a CMOS sensor.
  • the following procedure for detecting foreign bodies in the containers 2 is carried out as follows: With the acceleration section 40, the containers 2 are respectively accelerated and braked transversely to their longitudinal axes L. Between the first camera 50 'and the second camera 50 ", the acceleration 40a takes place in the direction of the transport direction T. First, a first camera image is taken with the first camera 50' before the acceleration and then with the second camera 50" a second. Since inertia forces act on the foreign bodies in the container as a result of the acceleration 40a, they are moved relative to the container bottom. Consequently, the foreign bodies in the two camera images appear at different locations.
  • the container 2 is decelerated in the acceleration section 40 between the second camera 50 "and the third camera 50" 'by the braking force 40b.
  • the foreign bodies again experience inertial forces and thus continue to move in the container 2.
  • the third camera image which is taken with the camera 50 "', the foreign objects are thus recorded again at a different location by comparing the third camera image with the first and the The foreign bodies can then be detected even more reliably with the second camera image, With the inspection devices shown in the following exemplary embodiments, this method can likewise be carried out analogously.
  • the machine controller 60 in which an image processing unit, not shown in more detail, is integrated, can also be seen.
  • an image processing unit not shown in more detail, is integrated
  • the machine control 60 is connected to the cameras 50 - 50'" and the transport device 30 with corresponding data and control lines.
  • the image processing unit may also be arranged separately from the machine control 60.
  • the inspection devices shown in the following exemplary embodiments may likewise include the machine control 60 analogously.
  • the inspection device 100 by means of the transport device 30 and the acceleration section 40, to move the foreign body in the container 2 by accelerating or decelerating in motion, so that they are displayed in each of the three camera images at different locations. Consequently, the foreign matter in the container can be reliably detected by comparing the camera images. Since the acceleration section 40 structurally particularly simple to implement, is the Inspection device 100 less expensive and therefore cost. It is also conceivable that the containers 2 are accelerated only to their longitudinal axes L only or only braked. It is also conceivable that only two or even more than three camera images are recorded with additional cameras.
  • a camera with the container to be inspected is arranged to follow the transport device, preferably in the region of the acceleration section 40.
  • the camera can be moved by a positioning unit.
  • FIG. 2 shows a further embodiment of the inspection apparatus 200 with a linear drive 230 with individual controllable gripper carriages 233 in a plan view.
  • the embodiment in FIG. 2 differs from that in FIG. 1 only in the constructive implementation of the transport device 230. It can be seen that the containers 2 are initially transported by a conveyor belt 8 to the inspection device 200. There they are taken up with the linear drive 230 with pairwise opposite gripper carriages 233 and can be individually accelerated and / or braked. Subsequently, the containers 2 are deposited on the second conveyor belt 9 and can be supplied to further treatment steps.
  • the linear drive 230 is here formed with two stator segments 232a and 232b, which extend on both sides along the transport path, so that the gripper carriages 233 are arranged in pairs opposite one another. Both stator segments 232a and 232b each form a self-contained path for driving and returning the gripper carriages 233, which are formed along the transport path straight and parallel to each other. However, it is also conceivable that the stator segments 232a and 232b extend along the transport path with one or more curved sections. Furthermore, it can be seen that on each gripper carriage 233, a gripper 231 is formed, in each case two opposite gripper carriages 233 with their grips 231 receive and transport a container.
  • stator segments 232a and 232b are formed here with a multiplicity of coil elements which can be controlled individually. This makes it possible to accelerate and / or decelerate the gripper carriages 233 individually. Consequently, the transport device 230 forms the acceleration section 240, in which the containers 2 can be accelerated or decelerated.
  • the cameras 250 ', 250 "and 250"' are arranged on the transport device 230. These are directed from below onto the container bottom of the container 2 to be inspected. It is also conceivable, however, that they look laterally from above through the container side wall onto the container bottom.
  • the acceleration section 240 is particularly well tuned to the individual container sizes or shapes, so that the foreign bodies are recognized as well as possible.
  • FIG. 3 shows a further exemplary embodiment of the inspection device 300 in a plan view.
  • the inspection device 300 differs from the inspection device 200 in FIG. 2 in that the stator segment 232a with the gripper carriage 233 arranged thereon has been replaced by the driven belt 335. Furthermore, it differs in that the rollers 334 are arranged on the grippers 331 of the gripper carriages 333 of the remaining stator segment 332b, which allow a rotation of the container 2 relative to the grippers 331.
  • the conveyor belt 335 is driven in rotation around the two rollers 336.
  • an electric motor preferably with a servomotor.
  • the band 335 runs essentially parallel to the transport path.
  • the inspection device 300 is used as follows: From the conveyor belt 8, the containers 2 are received between the belt 335 and the grippers 331 with the rollers 334. In this case, a camera image is first taken with the camera 350 'from the container bottom. Since the belt 335 moves relative to the gripper carriages 333, the containers 2 are unrolled during transport and thereby rotate in sections with the rotational speeds D1, D2 and D3. Accordingly, with the cameras 350 "and 350" 'further camera image are taken to the various rotational and motor conditions from the tank bottom.
  • the foreign bodies also rotate in the container 2 in addition to the linear movement, they can be detected particularly well with the inspection device 300. It is possible that the camera images are rotated in the image processing unit, not shown here, so that the same places on the container 2 come together to cover. Thereby, the rotational movement of the foreign body from the container 2 can be isolated.
  • FIG. 4 shows a further exemplary embodiment of the inspection device 400 with rollers 434 on the grippers 431 in a plan view.
  • the inspection device 400 differs from the inspection device 200 shown in FIG. 2 only in that the rollers 434, which are driven by the magnetic belts 437a, 437b, are arranged on the grippers 431.
  • the rollers 434 have magnetic elements, which are not shown in more detail, and which are rotated by being guided past the magnetic tapes 437a or 437b.
  • the magnetic tapes 437a have contiguous north and south poles, which become increasingly denser.
  • the rollers 434 are rotated increasingly faster, so that the container 2 rotates particularly rapidly with the rotation D2 via the second camera 450 "With magnetic tapes 437b similar thereto, the rollers 434 are braked and rotated by ever larger sections of the north and south poles This slows down until the container 2 over the third camera 450 "'comes to a halt with respect to its rotational movement.
  • the driven rollers 434 it is thus possible to rotate the containers 2 at different speeds in addition to the acceleration 440a and the braking force 440b, whereby the foreign bodies are better set in motion within the containers 2. This makes an even more reliable inspection possible.
  • FIG. 5 shows a further exemplary embodiment of the inspection device 500 with a plurality of transport segments 530a-530e with different curvatures of the transport path T1-T5 in a plan view.
  • the three linear conveyors 530a, 530c and 530e with alternating transport directions can be seen.
  • the containers 2 are taken up with the first star wheel conveyor 530 b and transported along a circular path, so that the radial acceleration 541 a acts thereon. Subsequently, the container 2 are deposited on the second linear conveyor 530c and transported to the second star wheel conveyor 530b.
  • the star wheel conveyors 530b and 530d act as acceleration sections 540th
  • the radial acceleration 541 a, 541 b transversely to the container longitudinal axis or to the transport path T2, T 4 , so that the foreign bodies are moved within the container 2.
  • the foreign bodies are preferably recorded in the region of the container bottom with camera images and, as described above, compared with each other. As a result, the foreign objects in the inspection device 500 can be recognized particularly easily.
  • the inspection device 600 is shown with a cam 632 for moving the container receptacles 631 in a plan view. It can be seen that the containers 2 with the supply and discharge stars 8, 9 of the inspection device 600 are supplied or removed. There, the container 2 are received in the container receptacles 631 and transported along the transport path in the direction of transport T.
  • the center of the hub 633c is arranged, which rotates in the direction R.
  • At the rigid arms 633a are arranged, at the outer end of the container receptacles 631 are attached radially displaceable.
  • the movable arms 633b are fixedly connected at their outer end to the container receptacles 631 and engage at its inner end in the cam 632 a.
  • the container receptacles 631 no longer move on a circular, but on an oval transport path. Consequently, therefore, the additionally inward-acting acceleration 640a and the outward-acting acceleration 640b are exerted on the containers 2. This overlaps with the radial acceleration of the circulating transport.
  • the cameras 650 ', 650 "and 650"' are shown, which receive the containers 2 from below in camera images, wherein in each case different acceleration forces act on the foreign bodies. As a result, the foreign matters move between the individual camera images and thus can be recognized by the inspection device 600.
  • cam 632 it is also conceivable here any other suitable shape of the cam 632, for example, with transverse waves or the like.
  • a pitch delay star instead of the cam 632, a pitch delay star can be used.
  • FIG. 7 shows a further embodiment of the inspection device 700 with a transport segment 730b with a positive guide 731, 732 in a plan view. It can be seen that the containers 2 are first transported with the first transport segment 730a to the second and then to the third transport segment 730c. At the end of the first transporting segment 730a, the stopper 732a is formed, with which the movement of the containers 2 in the direction Ti is stopped. There, the containers 2 are then taken over by the slide 731 and pushed along the stop 732 to the third transport segment 730c.
  • the slider 731 is here connected via the connecting rod 739 with the rotating wheel 738. hereby For example, the circular motion of the wheel 738 is translated into reciprocation of the slider 731 along the stop 732.
  • the containers 2 are accelerated by the reciprocating movement of the slider 731 in the acceleration section 740 first with the acceleration 740a and then decelerated again with the braking force 740b, so that they are finally parked on the third transport segment 730c and transported further in the direction T2.
  • At least one camera is not shown here in detail, with which at least two camera images can be recorded, wherein the containers 2 are accelerated and decelerated between the images of the camera images in the acceleration section 740.
  • the cameras here stationary or with the slider 731 are arranged in line.
  • a camera may be fixedly connected to the slider 731 and directed to the bottom of the container 2.
  • a plurality of cameras may be arranged along the acceleration section 740.
  • At least two camera images are taken from the container bottoms of the containers 2 during transport, with the containers 2 accelerating transversely to their longitudinal axes L between the receptacles of the camera images with the acceleration sections 40, 240, 340, 440, 540, 640 and 740 and / or be slowed down.
  • the foreign body in the container 2 in motion and are visible in the camera images at different locations.
  • the foreign bodies can then be reliably evaluated and recognized by means of an image processing device 60.

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Abstract

La présente invention concerne un dispositif d'inspection (100) pour détecter des corps étrangers dans des récipients (2), muni d'un dispositif de transport (30) pour transporter les récipients (2) le long d'une bande de transport (T), le dispositif de transport (30), par exemple muni d'un entraînement linéaire, comprenant au moins un tronçon d'accélération (40) conçu pour accélérer et/ou freiner les récipients (2) respectivement transversalement à leurs axes longitudinaux (L), et au moins une caméra (50', 50", 50"') étant disposée sur le dispositif de transport (30) de manière à pouvoir prendre respectivement au moins deux images pendant le transport des récipients (2), les récipients (2) étant accélérés et/ou freinés avec le tronçon d'accélération (40) entre les prises des images.
PCT/EP2018/069098 2017-09-07 2018-07-13 Dispositif d'inspection et procédé pour détecter des corps étrangers dans des récipients WO2019048114A1 (fr)

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