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WO2005059485A1 - Dispositif de pesee - Google Patents

Dispositif de pesee Download PDF

Info

Publication number
WO2005059485A1
WO2005059485A1 PCT/IS2004/000021 IS2004000021W WO2005059485A1 WO 2005059485 A1 WO2005059485 A1 WO 2005059485A1 IS 2004000021 W IS2004000021 W IS 2004000021W WO 2005059485 A1 WO2005059485 A1 WO 2005059485A1
Authority
WO
WIPO (PCT)
Prior art keywords
weighing
items
displacement member
weighing surface
movement
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IS2004/000021
Other languages
English (en)
Inventor
Jon Thor Olafsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marel hf
Original Assignee
Marel hf
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 Marel hf filed Critical Marel hf
Publication of WO2005059485A1 publication Critical patent/WO2005059485A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G21/00—Details of weighing apparatus
    • G01G21/22—Weigh pans or other weighing receptacles; Weighing platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/82—Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/16—Means for automatically discharging weigh receptacles under control of the weighing mechanism

Definitions

  • the present invention relates to a weighing apparatus. Items to be weighed are conveyed onto a weighing surface, and the apparatus comprises displacement means for removing weighed items from the weighing surface into a receiving means and returning to its original position withough physically interacting with subsequent items placed on the weighing surface.
  • the displacement means are comprised of a comb-like structure, which returns to its original position after removal of weighed items from the weighing surface by movement under and along the weighing surface, which contains a plurality of apertures which the displacement member can move through and along.
  • the invention further relates to a method of operating a weighing apparatus according to the invention.
  • Loading of the weighing means with one or several items to be weighed 2. Determination of the weight of the items put on the weighing means 3. Removal of the items from the weighing means These three steps either require manual intervention, i.e. manual loading and removal, or automatization by means of e.g. robotic arms. In both cases, the weighing operation is rather slow and thus inefficient.
  • Loading of a weighing means may be performed at high speed using conveying means, either by manual conveying or by loading via a conveyor. However, in such cases, the removal of items from the weighing means becomes the rate- limiting step in the weighing procedure.
  • a weighing apparatus which (i) allows accurate weight determination by means of a static weight, and (ii) provides means for rapid removal of items from the weighing means after determining the weight of one or more items. It is an object of the present invention to provide an apparatus for weighing items which allows rapid operation of a weighing means, including loading, weight determination and removal. The present invention further provides a method for operation of a weighing apparatus according to the invention.
  • the present invention provides a weighing apparatus comprising • loading means for delivery of items to be weighed onto a weighing surface;
  • weighing means comprising a weighing surface for accepting items to be weighed and means for recording and storing the weight of items to be weighed;
  • a displacement member for removing weighed items from the weighing surface by movement from an original position to a displacement position, the displacement member being mounted on a motor for providing horisontal and/or lateral movement of the displacement member;
  • receiving means for receiving items displaced from the weighing surface by the displacement member.
  • the displacement member comprises means for movement from the displacement position to an original position, after displacement of a first item or items from said weighing surface, without entering the space occupied by subsequent item or items to be weighed, after said item or items have been positioned on said weighing surface.
  • the movement of the displacement member is characterized by • transversal movement from an original position across said weighing surface, thus essentially removing the weighed items from the weighing surface;
  • the original position may for example be in the plane of the weighing surface behind the items that are to be weighed, seen from the position of the receiving means for the items.
  • the movement of the displacement member essentially is characterized by movement through the plane of the weighing surface towards the receiving means, thus pusing the weighed items into the receiving means.
  • the weighing apparatus is characterized by the first lateral movement comprising movement to a position essentially below said weighing surface.
  • the displacement member has a width approximately equal to the width of said weighing surface.
  • the effective removal of all items from the weighing surface is materialized, and is in particular important for displacement of a plurality of relatively small items from the weighing surface.
  • the displacement member has different dimensions, in particular when the items to be displaced are relative large and a relatively small displacemnt member is sufficient to be effective.
  • the displacement member does not have to be comprised of a continuous contact surface with the items to be displaced. Rather, it is possible in particular embodiment of the invention that the displacement member is provided in a plurality of individual displacement members, which may or may not be part of a single overall structure with respect to the movement of the displacement member across the weighing surface.
  • the weighing surface comprises at least one aperture and the displacement member copmrises at least one bar member for movement along and through said at least one aperture.
  • the weighing surface comprises a plurality of apertures and wherein the displacement member comprises an equal number of plurality of bars for movement along and through said apertures.
  • the displacement member may be of the general shape of a "comb" or a "fork”.
  • Such a design of the displacement member has the advantage of providing effective displacement of items from the weighing surface, and convenient movement through the weighing surface, provided by the apertures in the surface, across a plane approximately parallel to the plane of the weighing surface, and back through the apertures in the weighing surface for displacement of subsequent items that have been positioned on the weighing surface and subsequently weighed.
  • the design of the displacement member of the invention can be varied to suit different applications.
  • the design will depend on the nature of the weighing equipment being used and the nature of the production line of which the weighing equipment belongs. Thus, size constraints amongst other things are expected to be important for considering potential designs of the particular embodiments of the invention, while fulfilling the particlar characteristics defined in the above.
  • the design of the displacement member can be varied while fulfilling the principle characteristics of the invention.
  • various designs which include means for moving the displacement member within the plane of the weighing surface, above the plane or under the plane, after' displacement of the item or items that have been weighed from the weighing surface, are within the scope of the invention.
  • the displacement member is comprised of a first arm, said arm being mounted at its proximal end on said motor, a second arm being mounted at the distal end of said first arm, and a plurality of bars mounted normally on said second arm.
  • the first arm, the second arm and the plurality of bars are provided in one continuous structure.
  • Loading of items onto the weighing surface of the weighing apparatus of the invention may conveniently be done by manual means.
  • a construction or manufacturing line worker is typically capable of manually delivering up to about 100 items per minute.
  • each cycle of the weighing procedure takes about 0.6 seconds, which includes determination of the weight of the item or items placed on the weighing surface, displacement by the displacement member and manual loading of the weighing surface.
  • Commercial static weighing means are capable of determining the weight of items in a fraction of a second, and the movement of the displacement member across the weighing surface for displacing the item or items that have been weighed can be made as fast as needed by means well known to those skilled in the art.
  • a signal from the weighing means after the determination of the weight is complete can be used to trigger movement of the displacement means.
  • the rate determining step of this mode of operation will therefore in principle be provided by the loading rate of the operator.
  • automatic delivery means e.g. by a conveyor
  • the throughput of the weighing apparatus can be increased, but will however typically require a uniform distribution of items on the conveying means.
  • a sensor which can detect the position of items on the conveying means can adjust the rate of delivery of items, e.g. by adjusting the rate of the conveyor.
  • the present invention provides a method of operating a weighing apparatus, the method comprising the steps of
  • said displacement member comprises means for movement from a displacement position to an original position, after displacement of a first item or items from said weighing surface, without entering the space occupied by subsequent item or items to be weighed, after said item or items have been positioned on said weighing surface.
  • the removal of items from the weighing surface by means of said displacement member comprises the steps of • transversal movement from an original position across said weighing surface, thus essentially removing the weighed items from the weighing surface; • movement of said displacement member to its original position by a first lateral movement, such that the displacement member is essentially positioned below or above said weighing surface;
  • the first lateral movement comprises movement to a position essentially below said weighing surface.
  • the method involves the use of a weighing apparatus comprising a weighing surface which comprises a plurality of apertures wherein the displacement member comprises an equal number of plurality of bars for movement along and through said apertures.
  • the displacement member may be of the general shape of a "comb” or a "fork".
  • Such a design of the displacement member has the advantage of providing effective displacement of items from the weighing surface, and convenient movement through the weighing surface, provided by the apertures in the surface, across a plane approximately parallel to the plane of the weighing surface, and back through the apertures in the weighing surface for displacement of subsequent items that have been positioned on the weighing surface and subsequently weighed.
  • Figure la shows the weighing grid and the displacement or kick-off mechanism in an idle state
  • Figure lb shows the weighing grid and the displacement or kick-off mechanism in a full forward or kick-off position
  • Figure 2 shows the weighing grid and the weighing sensor.
  • a a weighing surface 1 comprising a plurality of apertures or slots 7 so as to be in the shape of a weighing grid is attached to a weighing sensor (i.e. a load cell) 2 as shown in figure 2.
  • a displacement member 3 in the shape of a comb-like structure serves the role of a kick-off mechanism for items that are to be weighed on the weighing surface.
  • the displacement member 3 is placed with both vertical 5 and horizontal 4 actuators underneath the weighing grid 1 so that its bars, in the shape of teeth, 6 can stick up through and slide along the slots 7 in the grid 1.
  • the comb 3 In an idle state the comb 3 is in a full backward position as shown in figure la.
  • the comb When an item enters the weighing grid (not shown) and a weighing signal has been processed, the comb is pushed forward by the horizontal actuators, kicking the item off the grid.
  • the comb At its full forward position (fig. lb) the comb is pulled down by the vertical actuator 5 and at the same time a pull-back operation is performed by the horizontal actuators 4 to move the comb back to its horizontal starting position.
  • the vertical actuator pushes the comb upwards to its idle state.
  • the core of the invention is to select a different path for the kick-off mechanism to travel backwards than to travel forward.
  • the backwards path lies underneath the weighing surface so that a weighing of a new item already entered on the weighing surface is not affected. A new weighing cycle can therefore be initiated before the kick-off mechanism has travelled back to its idle state, significantly increasing the throughput of such device.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sorting Of Articles (AREA)

Abstract

L'invention concerne un dispositif de pesée et son utilisation. Le dispositif comprend un système de déplacement (3) permettant de retirer des articles pesés de la surface de pesée (1) pour les transférer dans un système de réception. Ledit système reprend sa position originale sans interaction physique avec d'autres articles placés sur cette surface. En mode de réalisation préféré, le système de déplacement est à structure en peigne (6), qui reprend sa position originale après le retrait des articles pesés de la surface de pesée par un déplacement sous la surface de pesée (1) et le long de celle-ci, et ladite surface comprend plusieurs ouvertures (7) que le système de déplacement (3) peut traverser et le long desquelles il peut se déplacer. On améliore ainsi de façon significative le rendement du dispositif de pesée.
PCT/IS2004/000021 2003-12-19 2004-12-17 Dispositif de pesee Ceased WO2005059485A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IS7087 2003-12-19
IS7087 2003-12-19

Publications (1)

Publication Number Publication Date
WO2005059485A1 true WO2005059485A1 (fr) 2005-06-30

Family

ID=34685587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IS2004/000021 Ceased WO2005059485A1 (fr) 2003-12-19 2004-12-17 Dispositif de pesee

Country Status (1)

Country Link
WO (1) WO2005059485A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2115763A (en) * 1982-02-25 1983-09-14 Atecmi Sa Storage means for packages
DE3432305A1 (de) * 1984-09-03 1986-03-13 Paul Troester Maschinenfabrik, 3000 Hannover Vorrichtung zum wiegen von warenbahnabschnitten aus kautschuk- und/oder kunststoffmischungen
US5004093A (en) * 1989-11-08 1991-04-02 Charles Packaging Corporation Straight line sorting and/or fill-to-weigh machine
EP0653729A1 (fr) * 1993-11-10 1995-05-17 Neopost Industrie Dispositif d'alimentation en enveloppes incorporant une balance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2115763A (en) * 1982-02-25 1983-09-14 Atecmi Sa Storage means for packages
DE3432305A1 (de) * 1984-09-03 1986-03-13 Paul Troester Maschinenfabrik, 3000 Hannover Vorrichtung zum wiegen von warenbahnabschnitten aus kautschuk- und/oder kunststoffmischungen
US5004093A (en) * 1989-11-08 1991-04-02 Charles Packaging Corporation Straight line sorting and/or fill-to-weigh machine
EP0653729A1 (fr) * 1993-11-10 1995-05-17 Neopost Industrie Dispositif d'alimentation en enveloppes incorporant une balance

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