EP1371563B1 - Feeder for trays - Google Patents
Feeder for trays Download PDFInfo
- Publication number
- EP1371563B1 EP1371563B1 EP03011193A EP03011193A EP1371563B1 EP 1371563 B1 EP1371563 B1 EP 1371563B1 EP 03011193 A EP03011193 A EP 03011193A EP 03011193 A EP03011193 A EP 03011193A EP 1371563 B1 EP1371563 B1 EP 1371563B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stacks
- stack
- conveyance line
- pusher
- bars
- 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.)
- Expired - Lifetime
Links
- 238000012546 transfer Methods 0.000 claims abstract description 12
- 230000014759 maintenance of location Effects 0.000 claims abstract description 7
- 238000000151 deposition Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 5
- 230000008021 deposition Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
- B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
- B65B43/126—Feeding carton blanks in flat or collapsed state
Definitions
- the present invention relates to a feeder for trays.
- feeders are widely used which usually convey the trays in a plurality of vertical stacks from one processing station to the next: the feeder often positions each stack of trays, one stack after the other, in a holding area, from which they are then removed to be transferred to further stations.
- the stacks are generally conveyed on a horizontal line that is preferably constituted by belts being closed in a loop and wound around pulleys.
- Such feeders have a drawback related to the positioning of the stacks in the holding station at the output of the line: when a stack arrives at the output and leaves the belts, it tends by gravity to break up or tip, arranging itself incorrectly in the holding station and making it difficult to transfer the trays toward the subsequent processing stations.
- US-A-4 907 941 discloses a feeder for trays as defined in the preamble of claim 1.
- the aim of the present invention is to obviate this drawback by providing a feeder that allows to deposit the stacks of trays correctly and tidily at the output, thus facilitating transfer to the subsequent processing stations.
- an object of the present invention is to provide a feeder that is versatile and flexible, i.e., adapted to transfer effectively, from one station to the next, stacks oftrays having different shapes and dimensions.
- Another object of the present invention is to provide a structure that is simple, relatively easy to provide in practice, safe in use, effective in operation, and relatively low in cost.
- the numeral 1 generally designates a tray feeder according to the invention.
- the feeder comprises a frame 2 that is provided with means for continuously actuating rotationally a conveyance line 2a with belts for trays 3, which are packed into a plurality of vertical stacks 4 and are conveyed between an input 5a and an output 5b; at the output 5b of the conveyance line there is a subsequent station for depositing the stacks, which are then meant to be transferred and subjected to other processes.
- the conveyance line 2a comprises at least two parallel belts 6 and 7, which are closed in a loop and form respective horizontal active upper portions, on which the stacks 4 are made to advance: said belts are wound, at the output 5b, around respective pulleys 8 and 9 that are coaxial one another.
- the feeder comprises support, transfer and retention means 15 that are adapted to support the base of each one of the stacks 4 as its leaves the conveyance line 2a, preventing such stack from breaking up or tipping.
- the support, transfer and retention means 15 comprise two horizontal bars 16, which are parallel to the belts 6 and 7, are comprised between said belts, and are mirror-symmetrical with respect to the longitudinal axis of symmetry of the feeder; the bars 16 are associated with means 17 for horizontal translational motion and can be actuated so as to advance from a retracted position to an extended position in which they protrude beyond the output 5b of the conveyance line 2a in order to support the base of each one of the stacks 4 as they leave said line.
- the bars 16 can further be actuated so as to perform a backward translational motion from the extended position to the retracted position during the deposition of the stack 4, so as to allow its descent by gravity.
- the support, transfer and retention means 15 further comprise a pusher 18, which is associated with linear actuation means 19 and can move from a first position, in which it is located below the plane on which the stacks 4 are conveyed, to a second position, in which it is engaged in a rear region on the stack in order to apply thereto a thrust in the advancement direction: in this manner it is possible to obtain the correct exit of each stack 4 from the conveyance line 2a, since the resting of the base is ensured by the bars 16 in their extended position.
- a pusher 18 which is associated with linear actuation means 19 and can move from a first position, in which it is located below the plane on which the stacks 4 are conveyed, to a second position, in which it is engaged in a rear region on the stack in order to apply thereto a thrust in the advancement direction: in this manner it is possible to obtain the correct exit of each stack 4 from the conveyance line 2a, since the resting of the base is ensured by the bars 16 in their extended position.
- the means 17 for the translational motion of the bars 16 preferably comprise a first double-acting linear pneumatic actuator 20, which is rigidly coupled to the frame 2 of the feeder and acts in a direction that is substantially parallel to the advancement direction of the stacks 4.
- the stem 21 of the first pneumatic actuator 20 is connected to the centerline of a plate 22 that has, at its opposite ends, holes 23 for fixing the respective end portions of the bars 16.
- the means 19 for the linear actuation of the pusher 18 are constituted, in the specific case, by a second double-acting linear pneumatic actuator 25, in which the head 26 is rigidly coupled to a bracket 27 that is monolithic with the frame 2 and acts in a direction that is substantially inclined with respect to the horizontal advancement direction of the stacks 4: the tip of the stem 28 of the second pneumatic actuator 25 is rigidly connected to the pusher 18.
- the pusher 18 is constituted by a front plate 29 and by a rear plate 30, which are connected one another along their respective upper edges and are rigidly coupled, in a downward region, to an L-shaped element 31 for fixing to the stem 28 of the second pneumatic actuator 25.
- the front plate 29 has a cambered convex profile that is adapted to apply, in the translational motion of the pusher, a forward thrust that has a component in a substantially horizontal direction to the rear of the stack 4 about to leave the conveyance line 2a.
- the end of a stiffening rod 32 is further fixed to the L-shaped element 31; said rod is parallel to the stem 28 of the second pneumatic actuator 25 and can slide within an opening 33 formed in the bracket 27 for connection to the frame 2.
- Figure 1 illustrates the feeder in a step of operation in which the stacks 4 advance sequentially toward the output 5b, conveyed by the belts 6 and 7.
- the bars 16 are in a retracted position between belts 6 and 7, while the pusher 18 is in the first position below the plane of advancement of the stacks 4.
- the first pneumatic actuator 20 moves the parallel bars 16 from the retracted position to the extended position, so that they are inserted under the base of the stack 4 when such stack begins to protrude from the conveyance line 2a in order to leave it (Figure 2).
- the second pneumatic actuator 25 induces the pusher 18 to perform a translational motion from the first position to the second position ( Figure 3): this motion, particularly thanks to the engagement of the front plate 29 of the pusher behind the stack 4, allows to achieve a further advancement of said stack, supported by the bars 16, until it leaves completely the belts 6 and 7 of the feeder.
- the first pneumatic actuator can produce the reverse translational motion of the bars 16 from the extended position to the retracted position ( Figure 4): this translational motion is facilitated by the presence of the pusher 18 in the upper position, said pusher thus constituting an abutment for the stack 4, preventing it from retracting together with the bars 16.
- the stack 4 can finally descend tidily into the holding station in order to be then subjected to subsequent processing.
- the tray feeder according to the invention allows to transfer effectively and correctly stacks 4 of trays having different shapes and dimensions from one processing station to the next without the occurrence, particularly in the step for deposition of the stacks, of untidy or irregular arrangements that compromise the regular operation of the packaging line.
Abstract
Description
- The present invention relates to a feeder for trays.
- In the particular field of food packaging, it is known to use trays, made of the most different materials, in which foods are placed and then sealed.
- With the diffusion of automation in this field, feeders are widely used which usually convey the trays in a plurality of vertical stacks from one processing station to the next: the feeder often positions each stack of trays, one stack after the other, in a holding area, from which they are then removed to be transferred to further stations.
- In known types of feeders, the stacks are generally conveyed on a horizontal line that is preferably constituted by belts being closed in a loop and wound around pulleys. Such feeders have a drawback related to the positioning of the stacks in the holding station at the output of the line: when a stack arrives at the output and leaves the belts, it tends by gravity to break up or tip, arranging itself incorrectly in the holding station and making it difficult to transfer the trays toward the subsequent processing stations.
- US-A-4 907 941 discloses a feeder for trays as defined in the preamble of
claim 1. - The aim of the present invention is to obviate this drawback by providing a feeder that allows to deposit the stacks of trays correctly and tidily at the output, thus facilitating transfer to the subsequent processing stations.
- Within this aim, an object of the present invention is to provide a feeder that is versatile and flexible, i.e., adapted to transfer effectively, from one station to the next, stacks oftrays having different shapes and dimensions.
- Another object of the present invention is to provide a structure that is simple, relatively easy to provide in practice, safe in use, effective in operation, and relatively low in cost.
- This aim and these and other objects are all achieved by the present feeder for trays packed in vertical stacks, as defined in
claim 1. - Further features and advantages will become better apparent from the following detailed description of a preferred but not exclusive embodiment of a tray feeder according to the invention, illustrated by way of non-limitative example in the accompanying drawings, wherein:
- Figure 1 is a plan view and a side elevation view of the feeder in a first step of operation, in which the stacks of trays advance in succession on the conveyance line;
- Figure 2 is a plan view and a side elevation view of the feeder in a second step of operation, in which the leading stack of trays has partially left the line and is supported by the support and transfer means;
- Figure 3 is a plan view and a side elevation view of the feeder in a third step of operation, in which the stack of trays is pushed off the conveyance line;
- Figure 4 is a plan view and a side elevation view of the feeder in a fourth step of operation, in which the stack of trays is transferred to the holding station to be subjected subsequently to further processes.
- With reference to the figures, the
numeral 1 generally designates a tray feeder according to the invention. - The feeder comprises a
frame 2 that is provided with means for continuously actuating rotationally aconveyance line 2a with belts fortrays 3, which are packed into a plurality ofvertical stacks 4 and are conveyed between an input 5a and an output 5b; at the output 5b of the conveyance line there is a subsequent station for depositing the stacks, which are then meant to be transferred and subjected to other processes. - The
conveyance line 2a comprises at least twoparallel belts 6 and 7, which are closed in a loop and form respective horizontal active upper portions, on which thestacks 4 are made to advance: said belts are wound, at the output 5b, aroundrespective pulleys 8 and 9 that are coaxial one another. - At the sides of the
belts 6 and 7 and parallel thereto, there arevertical shoulders 10 and 11 whose mutual distance can be adjusted for example by way of screw-type adjustment means 12 (in order to allow to convey trays of different sizes), that guide the translational motion of thestacks 4 and extend beyond the output 5b with respective substantially triangularvertical extensions - According to the invention, the feeder comprises support, transfer and retention means 15 that are adapted to support the base of each one of the
stacks 4 as its leaves theconveyance line 2a, preventing such stack from breaking up or tipping. The support, transfer and retention means 15 comprise twohorizontal bars 16, which are parallel to thebelts 6 and 7, are comprised between said belts, and are mirror-symmetrical with respect to the longitudinal axis of symmetry of the feeder; thebars 16 are associated withmeans 17 for horizontal translational motion and can be actuated so as to advance from a retracted position to an extended position in which they protrude beyond the output 5b of theconveyance line 2a in order to support the base of each one of thestacks 4 as they leave said line. Thebars 16 can further be actuated so as to perform a backward translational motion from the extended position to the retracted position during the deposition of thestack 4, so as to allow its descent by gravity. - The support, transfer and retention means 15 further comprise a
pusher 18, which is associated with linear actuation means 19 and can move from a first position, in which it is located below the plane on which thestacks 4 are conveyed, to a second position, in which it is engaged in a rear region on the stack in order to apply thereto a thrust in the advancement direction: in this manner it is possible to obtain the correct exit of eachstack 4 from theconveyance line 2a, since the resting of the base is ensured by thebars 16 in their extended position. - The
means 17 for the translational motion of thebars 16 preferably comprise a first double-acting linearpneumatic actuator 20, which is rigidly coupled to theframe 2 of the feeder and acts in a direction that is substantially parallel to the advancement direction of thestacks 4. Thestem 21 of the firstpneumatic actuator 20 is connected to the centerline of aplate 22 that has, at its opposite ends,holes 23 for fixing the respective end portions of thebars 16. There is also aguide 24, which is rigidly coupled to theframe 2, for the support and sliding of thebars 16 from the retracted position to the extended position. - The
means 19 for the linear actuation of thepusher 18 are constituted, in the specific case, by a second double-acting linearpneumatic actuator 25, in which the head 26 is rigidly coupled to abracket 27 that is monolithic with theframe 2 and acts in a direction that is substantially inclined with respect to the horizontal advancement direction of the stacks 4: the tip of thestem 28 of the secondpneumatic actuator 25 is rigidly connected to thepusher 18. - The
pusher 18 is constituted by afront plate 29 and by arear plate 30, which are connected one another along their respective upper edges and are rigidly coupled, in a downward region, to an L-shaped element 31 for fixing to thestem 28 of the secondpneumatic actuator 25. Thefront plate 29 has a cambered convex profile that is adapted to apply, in the translational motion of the pusher, a forward thrust that has a component in a substantially horizontal direction to the rear of thestack 4 about to leave theconveyance line 2a. The end of astiffening rod 32 is further fixed to the L-shaped element 31; said rod is parallel to thestem 28 of the secondpneumatic actuator 25 and can slide within anopening 33 formed in thebracket 27 for connection to theframe 2. - Operation of the tray feeder according to the invention is as follows. Figure 1 illustrates the feeder in a step of operation in which the
stacks 4 advance sequentially toward the output 5b, conveyed by thebelts 6 and 7. In this step, thebars 16 are in a retracted position betweenbelts 6 and 7, while thepusher 18 is in the first position below the plane of advancement of thestacks 4. - When a
stack 4 approaches the output 5b, the firstpneumatic actuator 20 moves theparallel bars 16 from the retracted position to the extended position, so that they are inserted under the base of thestack 4 when such stack begins to protrude from theconveyance line 2a in order to leave it (Figure 2). At this point, the secondpneumatic actuator 25 induces thepusher 18 to perform a translational motion from the first position to the second position (Figure 3): this motion, particularly thanks to the engagement of thefront plate 29 of the pusher behind thestack 4, allows to achieve a further advancement of said stack, supported by thebars 16, until it leaves completely thebelts 6 and 7 of the feeder. At this point the first pneumatic actuator can produce the reverse translational motion of thebars 16 from the extended position to the retracted position (Figure 4): this translational motion is facilitated by the presence of thepusher 18 in the upper position, said pusher thus constituting an abutment for thestack 4, preventing it from retracting together with thebars 16. Thestack 4 can finally descend tidily into the holding station in order to be then subjected to subsequent processing. - The tray feeder according to the invention allows to transfer effectively and correctly stacks 4 of trays having different shapes and dimensions from one processing station to the next without the occurrence, particularly in the step for deposition of the stacks, of untidy or irregular arrangements that compromise the regular operation of the packaging line.
- It has thus been shown that the invention achieves the intended aim and objects.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
- All the details may further be replaced with other technically equivalent ones.
- In practice, the materials used, as well as the shapes and the dimensions, may be any according to requirements without thereby abandoning the scope of protection of the appended claims.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (7)
- A feeder for trays packed in vertical stacks, comprising a conveyance line (2a) with belts (6, 7) that has, at its output, a subsequent station where said stacks (4) are deposited, and support, transfer and retention means (15) that are adapted to support the base of each one of said stacks (4) as they leave said conveyance line (2a), characterized in that said support, transfer and retention means (15) comprise two horizontal bars (16) that are parallel to said conveyance line (2a) and that can be substantially horizontally actuated so as o advance from a retracted position to an extended position by translational motion means (17) comprising a first actuator (20), and said support, transfer and retention means further comprises a pusher (18) that is associated with linear actuation means (19) which comprise a second actuator acting along a direction that is substantially inclined with respect to the advancement direction of said stacks (4).
- The feeder according to claim 1, characterized in that said belt-type conveyance line (2a) comprises at least two parallel belts (6, 7), which are closed in a loop and form a horizontal active upper portion for conveying said stacks (4) between two opposite shoulders (10, 11).
- The feeder according to claims 1 and 2, characterized said two horizontal bars (16) in said extended position protrude beyond the output (5b) of said conveyance line (2a) in order to support said base of each one of said stacks (4) as it leaves, and can be actuated so as to perform a backward translational motion from said extended position to said retracted position during the step for depositing said stack (4), so as to allow the descent of said stack (4) by gravity.
- The feeder according to claim 1, characterized in that said pusher (18) can perform a translational motion from a first position, in which it lies below the conveyance plane of said stacks (4), to a second position, in which it is engaged in a rear region on said stack in order to push in the advancement direction, allowing said stack (4) to leave said conveyance line on said bars (16), said pusher (18) constituting an abutment for said stack (4) during the backward translational motion of said bars (16) in order to allow the correct positioning of said stack (4) in said holding station.
- The feeder according to one or more of the preceding claims, characterized in that said first actuator comprises a first double-acting linear pneumatic actuator (20) that acts along a direction that is substantially parallel to the advancement direction of said stacks (4), its stem (21) being rigidly coupled to the centerline of a plate (22) that has, at its opposite ends, holes (23) for fixing said bars (16).
- The feeder according to one or more of the preceding claims, characterized in that said second actuator comprises a second double-acting linear pneumatic actuator (25) that acts along a direction that is substantially inclined with respect to the advancement direction of said stacks (4) and in which the end portion of the stem (28) is connected to said pusher (18).
- The feeder according to one or more of the preceding claims, characterized in that said pusher is constituted by a front plate (29) and by a rear plate (30), which are connected along their respective upper edges and are monolithic, in a downward region, with an L-shaped element (31) for fixing to the stem (28) of said second pneumatic actuator (25), said front plate (29) having a cambered profile that is adapted to apply a thrust that has a component in a substantially horizontal direction to the rear of said stack (4), so as to make said stack (4) leave said conveyance line (2a).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002BO000385A ITBO20020385A1 (en) | 2002-06-14 | 2002-06-14 | TRAY FEEDER |
ITBO20020385 | 2002-06-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1371563A1 EP1371563A1 (en) | 2003-12-17 |
EP1371563B1 true EP1371563B1 (en) | 2006-03-22 |
Family
ID=11440231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03011193A Expired - Lifetime EP1371563B1 (en) | 2002-06-14 | 2003-05-28 | Feeder for trays |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1371563B1 (en) |
AT (1) | ATE320968T1 (en) |
DE (1) | DE60304079T2 (en) |
ES (1) | ES2260544T3 (en) |
IT (1) | ITBO20020385A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3247563A1 (en) * | 1982-12-22 | 1984-06-28 | Rovema Verpackungsmaschinen GmbH, 6301 Fernwald | DEVICE FOR FEEDING FOLDING CARTON CUTTINGS TO A CARDBOARD MACHINE |
GB2150920B (en) * | 1983-11-28 | 1987-11-11 | Mead Corp | Equipment and method for feeding packaging blanks to a packaging machine |
DE3627868A1 (en) * | 1986-08-16 | 1988-02-18 | Focke & Co | DEVICE FOR FEEDING CUTS TO A PACKING MACHINE |
DE3739659C1 (en) * | 1987-11-23 | 1989-03-23 | Bat Cigarettenfab Gmbh | Device for feeding a stack of cardboard blanks to a magazine |
-
2002
- 2002-06-14 IT IT2002BO000385A patent/ITBO20020385A1/en unknown
-
2003
- 2003-05-28 AT AT03011193T patent/ATE320968T1/en not_active IP Right Cessation
- 2003-05-28 EP EP03011193A patent/EP1371563B1/en not_active Expired - Lifetime
- 2003-05-28 DE DE60304079T patent/DE60304079T2/en not_active Expired - Lifetime
- 2003-05-28 ES ES03011193T patent/ES2260544T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60304079D1 (en) | 2006-05-11 |
ATE320968T1 (en) | 2006-04-15 |
ITBO20020385A1 (en) | 2003-12-15 |
ITBO20020385A0 (en) | 2002-06-14 |
EP1371563A1 (en) | 2003-12-17 |
DE60304079T2 (en) | 2006-09-28 |
ES2260544T3 (en) | 2006-11-01 |
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