Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C9/00—Details of labelling machines or apparatus
  • B65C9/08—Label feeding
  • B65C9/18—Label feeding from strips, e.g. from rolls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C1/00—Labelling flat essentially-rigid surfaces
  • B65C1/02—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands
  • B65C1/021—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands the label being applied by movement of the labelling head towards the article
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C1/00—Labelling flat essentially-rigid surfaces
  • B65C1/02—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C9/00—Details of labelling machines or apparatus
  • B65C9/08—Label feeding
  • B65C9/18—Label feeding from strips, e.g. from rolls
  • B65C9/1865—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip
  • B65C9/1876—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip and being transferred by suction means
  • B65C9/1884—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip and being transferred by suction means the suction means being a movable vacuum arm or pad

Definitions

• the invention relates to a device for providing and applying labels and a method for operating this device.
• Hand labeling devices are already known with which self-adhesive labels can be peeled off from a carrier web and applied to an object.
• the carrier web on which a large number of labels are applied one behind the other, is pulled off a roll and guided around a peeling edge at the point of issue of the label.
• the label is transported straight on so that its gum is exposed.
• the hand-held device has transport rollers with which it is rolled over the object to be labeled. The transport rollers move the carrier web further forward so that the label is completely peeled off the carrier web on the transport path and rolled onto the object.
• Such a hand-held device is well suited for the application of price tags to sales items in a department store, where large quantities of identically labeled labels have to be applied in any position to identically shaped objects. If, on the other hand, individually printed labels have to be applied automatically to objects of different shapes in a defined position, as is the case, for example, with automatic mail handling systems, the known device cannot be used.
• a device for applying individually printable labels to workpieces uses a carrier web with a large number of labels attached one behind the other.
• a label is first attached to the carrier web passed by a printer. After printing, the carrier web is guided past an acceptance location and the label is largely detached from it by deflecting the carrier web by a roller of comparatively small diameter.
• a suction gripper attached to an industrial robot picks up the label protruding freely into the room and removes it from the pick-up location.
• a removal plate is installed below the label protruding into the room. This should make it possible to securely pick up a label by the suction gripper even if it has a position tolerance typical of such robots, by which the label would otherwise be pressed "downwards".
• the object of the invention is therefore to provide a device for providing and applying labels and a method for operating this device, which allows a reliable removal of a label and the printing of a subsequent label independently of the removal of the previous one Labels allowed.
• the object is achieved by the characterizing features of claim 1 and, insofar as it is directed to a method for operating this device, by the features of claim 15.
• the device according to the invention essentially consists of three sections:
• roller conveyor track with a plurality of synchronously drivable len, on each of which several transport rollers are attached
• a label dispenser that is able to place a single label on the transport rollers of the roller conveyor
• a label manipulator which removes the label from the roller transport path in a predetermined access area and attaches it to a predetermined location of an arbitrarily shaped object arranged in a three-dimensional space.
• the labels are preferably applied one behind the other on a carrier web, the carrier web provided with the adhesive labels being angled away from a supply roll, guided at an acute angle around a peeling edge and wound up on a winding roll after the labels have been dispensed.
• the peeling edge is arranged on the input side of the roller conveyor, so that a label peeled off from the carrier conveyor is pushed onto the roller conveyor.
• the transport speeds of the carrier web and the roller transport web are the same.
• the peeled-off label now lies with its rubber coating on the transport rollers of the roller transport path. In order to prevent the label from sticking to the transport rollers, they have a very small contact area with the label. This is achieved in that the rollers are designed as spiked wheels or as narrow Teflon washers. There is a particularly low adhesive force between this material and the rubber coating of the label.
• the eti chain dispenser a label printer that works according to one of the known printing processes.
• the label printer preferably works according to the thermal printing process and the labels consist of thermal printing paper. It is particularly advantageous here to use thermal printing paper that turns red at a first print head temperature and black at a second, higher temperature.
• the essential component of the label manipulator is an elastically compressible foam cushion made of a closed-pore foamed material through which a suction channel is passed. This is connected to a vacuum pump.
• the foam cushion with the surface from which the suction channel emerges can be placed over the entire surface of a label located in the access area of the label manipulator.
• the foam cushion is glued to a pressure plate through which the suction channel is led.
• the pressure plate is slidably supported parallel to itself on a support plate along its surface normal and is supported on this with a compression spring.
• the label manipulator can also contain more than one pressure plate.
• the label is sucked onto the foam cushion or pillows particularly reliably if the axes of the suction channels of all foam pillows are aligned radially with a shaft of the roller transport path which is located at a distance from the label edges in the central region of the label.
• the axes of the suction channels advantageously point to the center of the distance between two adjacent transport rollers located on the aforementioned shaft, the distance of which corresponds to the diameter of the suction channel.
• the label manipulator is attached to a robot arm, which can be moved between the label dispenser and a transport path of an object to be labeled that runs perpendicular to its path of movement. At the same time it is The height of the label manipulator can be adjusted by the robot arm and can be rotated about a vertical axis.
• a labeling process with a previously described device, which is additionally equipped with a measuring device for the position and dimensions of an object to be labeled, proceeds as follows:
• a label to be applied to the object is then issued by the label dispenser and provided on the roller transport path in the access area of the label manipulator.
• a negative pressure is now generated in or in the suction channels of the label manipulator and at the same time the label manipulator is lowered onto the label located in the access area, where it is sucked onto the foam pad or pads.
• the label manipulator is now moved over the application location of the label on the object and rotated about its longitudinal axis until the orientation of the label corresponds to its desired angular position on the object.
• the label manipulator is then lowered and the label is pressed onto the object.
• the pressure force with which this occurs is determined by the force of the pressure spring (s).
• the vacuum pump is switched off, the label manipulator is raised and returned to the roller transport path.
• a particularly critical process step in the above-described method is the lifting of the label from the roll transport path, since the foam cushion has to be placed on the label with a certain, albeit minimal, pressure in order to securely suck the label.
• the label can adhere to the transport rollers.
• the adhesive force has already been described as low due to the special design of the transport rollers, it can be further reduced in a further development of the invention in that the transport rollers are set into a slow rotational movement while the label is being sucked in and lifted off.
• FIG. 1 shows a device for providing and applying labels in a schematic representation
• FIG. 2 a schematic side view of a label dispenser designed as a label printer
• FIG. 3 shows a label manipulator in front and side view in its spatial assignment to a roller transport path shown in plan view.
• Figure 1 shows a device 10 for providing and applying labels in a schematic representation. It comprises a label dispenser 12 with an access area 14 for a label manipulator 16. This is attached to a robot arm 18. The latter can be moved along a guide rail 20 in the direction of the double arrow X. In addition, it can be raised and lowered in the direction of the double arrow Z and rotated in the direction of the double arrow R about its longitudinal axis.
• the guide rail 20 extends from the access area 14 to a transport path 22 running perpendicular to it, on which a support surface 24 for an object 26 to be labeled is displaced in the direction of the arrows Y is slidable.
• a video camera 28 is located above the transport path 22 and can capture the entire surface of the support surface 24.
• the video camera is connected to a controller, not shown, which can determine the dimensions of the object 26 and its position on the support surface from the video signals. Depending on this information, the robot arm 18 and the position of the support surface 24 on the transport path 22 can be controlled.
• the label manipulator 16 is connected to a vacuum pump 32 via a vacuum line 30.
• the label dispenser 12 is shown in a schematic side view. It is designed as a label printer 34.
• a supply roll 38 is rotatably mounted, on which a carrier web 40 for a large number of self-adhesive labels 48 arranged one behind the other is rolled up.
• the end of the carrier web 40 running from the supply roll 38 is passed between a thermal printing bar 42 and a printing roller 44 such that the label to be printed faces the thermal printing bar 42.
• a peeling bar with a peeling edge 46 is arranged behind the thermal pressure bar 42 in the transport direction, around which the carrier web 40 is guided at an acute angle.
• the printed label 48 is peeled off from the carrier web 40 and pushed onto a roll transport web 50.
• the roller transport track 50 consists of a number of spiked wheels 52 which are rotatably mounted on six shafts 54 arranged parallel to one another in one plane.
• the pressure roller 44 and the pinwheels 52 are driven at a synchronous peripheral speed.
• the end of the carrier web 40 freed from the labels 48 is rolled up on a take-up roll 56.
• the diameter of the supply roll 38 which is a measure of the number of labels still available, is determined by a scanning lever 58 which scans the circumference of the supply roll 38. watches. As soon as a switching flag 60 attached to it emerges from a fork light barrier 62, the end of the
• Carrier web 40 reported to the controller, which in turn stops the device 10.
• Figure 3 shows the label manipulator 16 at a in front and at b in side view. It is shown in its spatial assignment to a roller transport path 50 'shown in a top view. The latter differs from the roller transport path 50 only in that the transport rollers 70 are designed as narrow Teflon disks, the contact line 72 of which is burr-shaped with a label 48.
• the transport rollers 70, 70 'of adjacent transport shafts 54 are offset from one another in such a way that the transport rollers 70 of one shaft project into a gap between adjacent transport rollers 70' of the other shaft. The distance between the shafts 54 is only insignificantly larger than the radius of the transport rollers 70, 70 '.
• the access area 14 of the label manipulator 16 on the roller transport path 50 ' is symbolized by a label 48 resting thereon.
• the latter covers three shafts 54a, 54b, 54c.
• the arrangement of the transport rollers 70b on the shaft 54b will be discussed in connection with the description of the label manipulator 16.
• the label manipulator 16 is shown in a partially sectioned front view and in Figure 3b in a partially sectioned side view. It comprises a support plate 80 which is fastened to the robot arm 18. It is penetrated by two guide bores 82 on its right side in the picture and by two guide bores 82 'on the left side. In these guide pins 84 and 84 'are slidably mounted, on the lower end of which a pressure plate 86 or 86' is attached. The upper end is secured against sliding out of the support plate 80 by a locking ring 88. On every guide pin 84, 84 ', a helical compression spring 90 is attached, which is supported on the one hand on the support plate 80 and on the other hand on the pressure plate 86, 86'.
• a cuboid-shaped, elastically compressible foam plastic 92, 92 'made of a closed-cell foam material is glued in place.
• Each foam cushion is penetrated by a suction channel 94 which is circular in cross section, which is widened downwards in a funnel shape and is led up through the pressure plate 86 or 86 ', where it ends in a hose nipple 96 on the upper side thereof.
• a vacuum line 30 (FIG. 1) can be plugged onto each hose nipple.
• the suction channels 94 of the foam materials 92, 92 ' are arranged radially above the shaft 54b of the roller conveyor 50'.
• Each suction channel opens out via a pair of transport rollers 70b whose distance d corresponds to the diameter of the suction channel 94.
• This arrangement has the advantage that the label 48 is well supported in the area of action of the suction channels 94. The label is therefore not deformed in this area by the pressure of the attached foam material 92, 92 ', which would lead to a reduction in the suction effect of the vacuum pump 32.
• the process of providing a label in the access area 14 of the roll transport path 50 'and lifting the label 48 is described below.
• the label is peeled off the carrier web 40 at the peeling edge 46 and reaches the transport rollers 70, 70 'and 70b, from which it is transported to a reflex light barrier 74, which in turn switches off the drive of the shafts 54.
• the label 48 lies in the access area 14 of the label manipulator 16. The latter is now placed on the label 48 lowered until the lower surface 93 of the foam cushions 92, 92 'lie on the full surface of the label 48 and are slightly compressed under the contact pressure. This ensures that the suction channels 94 are sealed airtight by the label.

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• Labeling Devices (AREA)
• Push-Button Switches (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7779142

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (54)

Family Cites Families (11)

• 1995
  • 1995-12-04 DE DE19545191A patent/DE19545191A1/de not_active Withdrawn
• 1996
  • 1996-12-02 KR KR10-1998-0704134A patent/KR100433305B1/ko not_active IP Right Cessation
  • 1996-12-02 ES ES96946032T patent/ES2135955T3/es not_active Expired - Lifetime
  • 1996-12-02 DE DE59602572T patent/DE59602572D1/de not_active Expired - Fee Related
  • 1996-12-02 AT AT96946032T patent/ATE182542T1/de not_active IP Right Cessation
  • 1996-12-02 JP JP9520864A patent/JP2000502309A/ja not_active Ceased
  • 1996-12-02 US US09/077,649 patent/US6080250A/en not_active Expired - Fee Related
  • 1996-12-02 CA CA002239290A patent/CA2239290A1/fr not_active Abandoned
  • 1996-12-02 WO PCT/DE1996/002308 patent/WO1997020739A1/fr active IP Right Grant
  • 1996-12-02 EP EP96946032A patent/EP0868352B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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