Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H3/00—Separating articles from piles
  • B65H3/42—Separating articles from piles by two or more separators mounted for movement with, or relative to, rotary or oscillating bodies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H3/00—Separating articles from piles
  • B65H3/08—Separating articles from piles using pneumatic force
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H3/00—Separating articles from piles
  • B65H3/08—Separating articles from piles using pneumatic force
  • B65H3/0808—Suction grippers
  • B65H3/0816—Suction grippers separating from the top of pile
  • B65H3/0825—Suction grippers separating from the top of pile and acting on the rear part of the articles relatively to the final separating direction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H3/00—Separating articles from piles
  • B65H3/08—Separating articles from piles using pneumatic force
  • B65H3/0808—Suction grippers
  • B65H3/0883—Construction of suction grippers or their holding devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/50—Driving mechanisms
  • B65H2403/51—Cam mechanisms
  • B65H2403/511—Cam mechanisms involving cylindrical cam, i.e. cylinder with helical groove at its periphery
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/50—Driving mechanisms
  • B65H2403/51—Cam mechanisms
  • B65H2403/512—Cam mechanisms involving radial plate cam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/50—Driving mechanisms
  • B65H2403/53—Articulated mechanisms
  • B65H2403/533—Slotted link mechanism
  • B65H2403/5331—Slotted link mechanism with sliding slotted link
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/30—Suction means
  • B65H2406/34—Suction grippers
  • B65H2406/345—Rotary suction grippers
  • B65H2406/3452—Rotary suction grippers performing reciprocating movement during rotation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2801/00—Application field
  • B65H2801/03—Image reproduction devices
  • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

• Sheet feeder for a machine for processing sheet material such as paper, cardboard or foils
• the invention relates to a sheet feeder for a machine for processing sheet material such as paper, cardboard or films.
• the machine may be a laminating machine that applies a coating material, such as a plastic film, to a substrate and firmly bonds the two together.
• the machine may, for example, also be a machine for the production of corrugated cardboard. But there are also other application examples conceivable.
• the sheet feeder serves to grab from a stack of provided sheets the topmost and remove from the stack in a sheet feed direction, so that the top sheet can then be further processed.
• vacuum grippers are known for this purpose, which are placed translationally from above on the top sheet of the stack and then lift it vertically from the stack. Subsequently, the lifted from the stack sheet is detected by other grippers and moved translationally in the sheet feed direction.
• the object of the invention is to provide a simpler in terms of their construction device.
• a sheet feeder according to the invention is provided with a drive shaft which extends substantially perpendicular to a sheet feed direction and is provided with at least one suction pad, which is rotated above the sheet material when the drive shaft is driven, wherein the suction pads between a inactive position, in which it does not interact with the sheet material, and an active position is adjustable, in which he is at the top of the sheet material attack and take this with you.
• the invention is based on the idea of combining the two components of movement (namely vertical and horizontal) known from the prior art into a single, flowing movement. To this end, the suction gripper rotates above the stack of sheet material, engaging, lifting and entraining the top sheet of the stack during a suitable portion of its trajectory. It is thus no longer necessary to transfer the sheet from a first device which lifts it to a second device which moves it away from the stack and pushes it forward.
• a plurality of suction pads are provided, which are arranged in a plurality of groups, which are spaced apart in the axial direction of the drive shaft.
• the meaningful number of groups and the distance between the groups depend on the properties of the sheets to be taken from the stack. Particularly preferred are between four and ten groups.
• each group has a plurality of suction pads which are circumferentially spaced around the drive shaft from each other. This makes it possible to increase the number of cycles.
• each group has three suction pads.
• a suction gripper grasps the top sheet, raises it and moves it slightly forward, the next suction gripper is already brought up.
• each suction pad has a body and a relative thereto adjustable suction cup, wherein the body is mounted at a distance from the central axis of the drive shaft.
• the size of the radius on which the body of each suction pad is mounted has a decisive influence on the distance by which the top sheet can be pushed forward when the corresponding suction pad attacks him.
• the bodies are preferably rotatably mounted relative to the drive shaft, so that the front of the suction pads, which acts on the sheets, over a certain portion of the movement of the suction pads can be kept parallel to the plane of the arches.
• the radius at which the body is moved about the drive shaft is preferably variable so that the vertical and horizontal components of the movement of the suction pads are controlled in the desired manner.
• an adjusting mechanism can be provided, with which the position and orientation of the suction pads is controlled relative to a plane in which the sheets are.
• the movement path of the suction gripper can be controlled so that they move in spite of the rotational movement of the drive shaft over a certain distance (at least almost) parallel to the plane of the sheets.
• the drive axle on a plurality of support rods which extend parallel to the axis of rotation of the drive shaft and to which the body of the suction pads are mounted.
• the handrails make it possible to adjust all those suction pads, which are viewed in the circumferential direction at the same position, at the same time with little effort.
• the support rods are rotatable and displaceable relative to the drive shaft so that both the orientation and the radius on which the suction pads are located at any point in their trajectory can be controlled in the desired manner.
• the position and the rotation of the support rods are preferably adjusted by means of the adjustment mechanism.
• This can according to a simple embodiment have a curved path and a cam follower. In this way, no servomotors or similar complex components are required, but it can be achieved in a purely mechanical way, the desired adjustment of the support rods.
• At least one pneumatic channel is integrated in the drive shaft, with which the suction pads are connected. This makes it possible to perform the necessary to activate the suction pads compressed air or a negative pressure without much effort.
• a separate pneumatic channel can be provided within the drive shaft for each support rod.
• a hold-down is provided which cooperates in a suitable manner with the sheets located on the stack when the suction pads lift the uppermost sheet.
• Figure 1 shows schematically an example of a machine for processing sheet material
• FIG. 2 is a schematic, perspective view of the essential part of the sheet feeder
• FIG. 3 is an enlarged view of a portion of the sheet feeder of Figure 2;
• - Figure 4 shows the part of the sheet feeder shown in Figure 3, wherein a frame part is omitted to see the underlying part can;
• Figure 5 is a schematic plan view of the visible in Figure 4 slide guide
• FIG. 6 is a schematic plan view of a group of suction pads together with your adjustment mechanism
• a machine 1 which serves to process sheet material.
• the machine is used to connect each two sheets together, for example, to laminate each other.
• Reference numeral 2 denotes a first stack of sheets
• reference numeral 3 denotes a second stack of sheets.
• a respective sheet from the stack 2 is combined with a sheet from the stack 3, for example glued together.
• the individual sheets may be sheets of paper, plastic film, cardboard or similar materials.
• a sheet feeder is provided. This is exemplified here at the stack 3 with the reference numeral 4.
• the sheet feeder 4 will be explained in more detail with reference to FIGS 2 to 7.
• An essential component of the sheet feeder 4 is a drive shaft 10, which is arranged above the plane in which the uppermost sheet of the stack 3 is located.
• the drive shaft 10 extends parallel to this plane and perpendicular to the direction in which each sheet removed from the stack 3 is then transported (see the arrow P in Figure 1, this direction is also referred to as a sheet feed direction).
• a frame 1 1 is provided, which is arranged above the point at which the stack 3 is located.
• suction grippers 12 serve to grasp the respective uppermost sheet of the stack and to move it forward relative to the stack 3 in the direction of the arrow P.
• the suction pads 12 are spaced apart from the axis of rotation of the drive shaft 10 so that when the drive shaft 10 is driven, they move about the axis of rotation along a closed path of travel.
• the suction grippers 12 are arranged in different, axially spaced-apart groups. As can be seen in FIG. 2, a total of six groups of suction grippers 12 are provided along the axis of rotation of the drive shaft 10. As can be seen in FIG. 3, each group of suction grippers here contains three suction grippers 12.
• the suction grippers 12 are distributed over a total of three holding rods 14 which all extend parallel to the axis of rotation of the drive shaft 10. In the circumferential direction considered the support rods 14 are arranged at an angular distance of 120 ° relative to each other.
• the three support rods 14 are mounted in two holding elements 16, which are arranged at opposite axial ends of the drive shaft 10.
• Each support member 16 has three extending in the radial direction of support arms 18, wherein in each support arm 18, a guide slot 20 is provided which extends radially and in which one end of a support rod 14 is received.
• the guide slots 20 allow the support rods 14 to adjust relative to the axis of rotation of the drive shaft 10 in the radial direction.
• the radius on which each support rod 14 is located is determined by a guideway 22, which can be seen in particular in FIG.
• the guideway 22 has a broadly circular shape, being flattened on the side facing the stack 3.
• the guide track 22 is provided in one of the side plates of the frame 1 1, in which the drive shaft 10 is mounted.
• the support rods 14 are, when the drive shaft 10 rotates, not only adjusted with respect to the radial distance from the axis of rotation during each revolution, but also in each case also rotated within certain limits relative to the corresponding support arm 18.
• a cam track 30 (see in particular FIG. 4) is provided in which a plurality of cam followers 32 run.
• Each cam follower 32 is coupled via a connecting rod 34 with a support rod 14.
• the guide slots 20 together with the guide track 22 and the cam track 30 with the cam followers 32 form an adjustment mechanism with which the position and orientation of the suction pads 12 is controlled at each revolution of the drive shaft 10.
• each suction pad 12 moved so that its "front", so the aufdinde on the appropriate sheet sheet, is aligned parallel to the plane of the corresponding arc, as long as the suction pad cooperates with the bow.
• the corresponding suction pad 12 "is transferred over head again in a position in which he can again attack on a bow.
• the curved path viewed in an axial direction, is usually outside the guideway 22.
• Each suction gripper 12 has a body 40 (see FIG. 3) which is fastened in a rotationally fixed manner to one of the holding rods 14.
• a telescopically extendable plunger 42 is slidably mounted on the front side of the actual suction cup 44 is mounted.
• a return spring 48 (see Figure 6) is arranged, which acts on the plunger 42 in a retracted position in which the suction cup 44 is adjusted to the body 40 out.
• the suction pads 12 are activated with compressed air and contain a Venturi nozzle, so that the suction cup 44, the desired negative pressure can be generated.
• the compressed air supplied for activating the suction cup 44 causes the plunger 42 to be telescoped outward out of the body 40 against the action of the return spring.
• the compressed air is supplied within the drive shaft 10 in a pneumatic channel and passed from there via visible in Figure 2 connecting piece 46 to the body 40; attached to the connecting piece 46 hoses are not shown here for the sake of clarity.
• a single pneumatic channel may be provided, to which all suction pads are connected, or for the suction pads of each support rod its own pneumatic channel.
• one of the suction pads 12 of a group of suction pads is considered as an example, wherein the corresponding suction device is marked for better traceability with a black dot.
• the drive shaft 10 rotates with respect to the figures 7 to 12 in a clockwise direction to remove the respective uppermost sheet of the stack 3 in the direction of the arrow P from the stack, so that it can be further processed.
• the suction gripper 12 considered here is approximated to the stack 3 from above, wherein it is rotated by means of the adjusting mechanism, in particular by means of the cam track 30 and the corresponding cam follower 32 so that the plunger 42 is approximately perpendicular to the plane of the top sheet of the stack. 3 is located (see Figures 7 and 8).
• the support rod 14 is located on a comparatively large radius.
• the compressed air supply of the suction pad 12 is switched so that the return spring pulls the plunger 42 in the body 40, while the negative pressure on the suction cup 44 continues to act.
• the sheet 50 is lifted off the stack 3 (see FIG. 10).
• a hold-down 60 is activated, which fixes the underlying sheet of the stack 3.
• the suction gripper 12 Upon further rotation of the drive shaft 10, the suction gripper 12 is moved further in the clockwise direction (see Figure 1 1), where it performs a substantially translational movement parallel to the plane of the sheets in the stack 3 and in the direction of the arrow P due to the guide track 22.
• FIG. 12 shows the state in which the sheet 50 has been moved so far to the left that it is gripped by a conveying device 70 shown schematically in FIG. At about the same time, the suction cup 44 is deactivated so that the sheet is released.
• Figure 8 it can be seen that in this state already the subsequent suction cup to the then top Sheet of the stack 3 is approached, so that the next sheet can be grasped and the conveyor 70 can be supplied.
• the drive shaft 10 need not necessarily be designed as a unitary component that extends along the axis of rotation about which the suction pads 12 are adjusted. Instead, other designs are conceivable. It is only important that the suction pads 12 can be moved along a circular path about a rotation axis.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sheets, Magazines, And Separation Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=63862089

Family Applications (1)

Country Status (9)

Families Citing this family (1)

Family Cites Families (25)

• 2018
  • 2018-10-09 JP JP2020521322A patent/JP6938783B2/ja active Active
  • 2018-10-09 WO PCT/EP2018/025262 patent/WO2019072415A1/de unknown
  • 2018-10-09 TW TW107135596A patent/TWI683777B/zh active
  • 2018-10-09 MX MX2020003744A patent/MX2020003744A/es unknown
  • 2018-10-09 US US16/651,223 patent/US11292680B2/en active Active
  • 2018-10-09 CN CN201880066434.8A patent/CN111406031B/zh active Active
  • 2018-10-09 RU RU2020115449A patent/RU2742017C1/ru active
  • 2018-10-09 BR BR112020006393-2A patent/BR112020006393A2/pt not_active Application Discontinuation
  • 2018-10-09 EP EP18786676.9A patent/EP3694798A1/de not_active Withdrawn

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