EP2212222A1 - Schneckenförderer - Google Patents
SchneckenfördererInfo
- Publication number
- EP2212222A1 EP2212222A1 EP08850602A EP08850602A EP2212222A1 EP 2212222 A1 EP2212222 A1 EP 2212222A1 EP 08850602 A EP08850602 A EP 08850602A EP 08850602 A EP08850602 A EP 08850602A EP 2212222 A1 EP2212222 A1 EP 2212222A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- helical
- conveyor belt
- helical path
- drive
- drive mechanism
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/16—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths
- B65G21/18—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths in three-dimensionally curved paths
-
- 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
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/02—Belt- or chain-engaging elements
- B65G23/04—Drums, rollers, or wheels
- B65G23/06—Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels
-
- 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
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/02—Belt- or chain-engaging elements
- B65G23/14—Endless driving elements extending parallel to belt or chain
- B65G23/16—Endless driving elements extending parallel to belt or chain with dogs engaging abutments on belts or chains
-
- 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
- B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
- B65G2207/24—Helical or spiral conveying path
Definitions
- the invention relates to a helical conveyor comprising a frame for supporting a helical path having a number of windings or storeys placed above one another, a modular conveyor belt sitting on the helical path and able to slide over it, a drive mechanism engaging a side of the modular conveyor belt at a number of windings or storeys placed above one another.
- the invention furthermore relates to a drive mechanism for such a helical conveyor.
- Dutch patent application 8702276 describes a helical conveyor for during a certain period of time under conditioned circumstances having products circulate, particularly food products such a dough products.
- a rotatable drum is positioned for driving the conveyor belt using friction.
- the peripheral velocity of the drum is slightly higher than the speed of locomotion of the conveyor belt. Slight slippage will therefore occur.
- the conveyors in question however are exposed to temperature changes and sometimes the products will soil.
- the friction coefficient between drum and the modular conveyor belt may as a result acquire a different value which may lead to problems.
- the known helical conveyor is furthermore provided with a rotatable drum, in the shape of a stainless steel pipe.
- Said pipe forms a costly element of the helical conveyor and, in view of the dimensions of the known helical conveyors, has large dimension which may give rise to problems when transporting or building up the helical conveyor. It is an object of the present invention to at least partially solve one or more of the above-mentioned problems.
- the invention provides a helical conveyor comprising a frame for supporting a helical path having a first number of windings or storeys placed above one another, a modular conveyor belt sitting on the helical path and able to slide over it, a drive mechanism engaging a side of the modular conveyor belt at a second number of windings or storeys placed above one another, wherein the second number is lower than or equal to the first number, wherein the helical conveyor comprises a freely rotatable support roller positioned within the helical path, for having a side of the modular conveyor belt facing the inner side of the helical path supporting against it, and wherein the drive mechanism is placed at an outer side of the helical path.
- the helical conveyor according to the invention is provided with a freely rotatable support roller, which is positioned within the helical path for having a side of the modular conveyor belt facing the inner side of the helical path supporting against it, particularly near the location where the drive mechanism is placed at the outer side of the helical path and engages onto the outer side of the modular conveyor belt.
- the modular conveyor belt is thus passed between the support roller at the inner side of the conveyor path and the drive mechanism at the outer side of the conveyor path.
- the freely rotatable support roller in the helical conveyor according to the invention is only used for having the conveyor belt supporting against it, and not for driving the conveyor belt using friction, it can be designed much more lightweight, the conveyor belt will substantially not slip along the support roller, and the diameter of the support roller can be smaller than an inner diameter of the helical path.
- the modular conveyor belt will be less prone to wear which may lead to reduction of pollutions by wearing products and/or the life span of particularly the conveyor belt will be extended.
- the diameter of the support roller may be smaller than the inner diameter of the helical path.
- the diameter of the support roller may be adapted for only giving support at the location of the drive mechanism.
- the drive mechanism is placed such with respect to the support roller that the support roller is able to suitably absorb possible radial forces exerted by the drive mechanism on the conveyor belt.
- the drive mechanism is placed substantially radial with respect to the support roller.
- the helical conveyor may be provided with a number of support rollers that are distributed within the helical path preferably in a regularly spaced apart manner.
- several drive mechanisms can be placed around the helical conveyor, in connection with maximum belt forces.
- the drive mechanism for each of the second number of windings placed above one another, comprises a drive element for operational connection to a side of the modular conveyor belt facing the outer side of the helical path.
- the drive element comprises a first confining element placed above the drive element, which first confining element extends at least partially above an edge area of the modular conveyor belt.
- the conveyor belt is confined in the vertical sense near the drive element between the helical path at the lower side and the first confining element at the upper side. The first confining element ensures that the conveyor belt at least near the drive element cannot fold upwards, as a result of which the operational connection between the drive element and the conveyor belt is guaranteed.
- the drive element further comprises a second confining element placed below the drive element, which second confining element extends at least partially below an edge area of the modular conveyor belt.
- the modular conveyor belt at least at the location of the drive element, is confined between the first and second confining element.
- first and/or second confining element are parts of the drive element, and thus will fixate the conveyor belt only locally at least near the drive element.
- first and/or the second confining element comprises a piloting edge facing the drive element.
- the drive element comprises a toothed wheel that is operationally connected to the side of the modular conveyor belt facing the outer side of the helical path.
- the modular conveyor belt is provided with a series of cams for engagement onto the toothed wheel. The teeth of the toothed wheel are thus able to mesh with recesses between the series of cams for driving the conveyor belt.
- the first and/or second confining element comprises a disk placed adjacent to the toothed wheel, wherein the diameter of the disk is larger than the diameter of the toothed wheel.
- the disk- shaped first and/or second confining element is placed above and/or below the toothed wheel respectively, wherein the disk or disks preferably are placed on the drive shaft of the toothed wheel.
- the first and/or the second confining element will be able to be rotated together with the toothed wheel. Due to these rotatable confining elements, on the one hand the friction between the confining elements and the conveyor belt can be reduced and on the other hand brake forces the conveyor belt is subjected to due to stationary confining elements can substantially be avoided.
- the drive element comprises a first and second toothed wheel placed adjacent to each other and around which a drive chain is placed for operational connection to the side of the modular conveyor belt facing the outer side of the helical path.
- the modular conveyor belt preferably at the side facing the outer side of the helical path is provided with a series of cams for meshing with the drive chain.
- the drive element according to this embodiment that means with a drive chain, will engage along a trajectory of the helical path, wherein the length of the trajectory is defined by the distance between the first and second toothed wheel.
- the drive power exerted by the drive element on the conveyor belt particularly the drive powers at the location of a winding or storey where the drive element in question engages onto the conveyor belt, can be distributed over the trajectory.
- a first embodiment including drive chain comprises a first and/or second confining element.
- Said confining elements are designed as a disk placed adjacent to the first and/or second toothed wheel, wherein the diameter of the disk is larger than the diameter of the toothed wheel with the drive chain placed around it.
- the disk will be able to extend above and/or below an edge area of the conveyor belt in order to ensure that the drive element remains continually coupled to the conveyor belt.
- the drive chain is provided with first and/or second confining elements that may extend above and/or below an edge area of the conveyor belt at the moment that the drive chain is situated near the conveyor belt.
- the drive chain comprises a number of substantially vertically extending pins for operational connection to the side of the modular conveyor belt facing the outer side of the helical path.
- the pins may in that case mesh with the recesses between the cams.
- the drive chain may furthermore be provided with links placed above and below the pins for forming the drive chain.
- the vertically extending pins are placed substantially centrally in the drive chain. Said embodiment has the advantage that substantially no moment is exerted on the drive chain, contrary to the drive chain provided with teeth as shown in figure 7 of US patent 5,454,467.
- the top links comprise the first confining elements. In one embodiment at least one of the top links is integrally formed with at least one of the confining elements. In one embodiment the bottom links comprise the second confining elements, wherein in one embodiment, at least one of the bottom links is integrally formed with at least one of the second confining elements. In these embodiments the links thus have a twofold function, on the one hand to form the drive chain, on the other hand to confine the conveyor belt near the drive element.
- the invention provides a drive mechanism for a helical conveyor comprising a frame for supporting a helical path having a first number of windings or storeys placed above one another, a modular conveyor belt sitting on the helical path and able to slide over it, and a freely rotatable support roller positioned within the helical path for having a side of the modular conveyor belt facing the inner side of the helical path supporting against it, wherein the drive mechanism is placed at an outer side of the helical path, substantially radially opposite the support roller, for operational connection of the drive mechanism to a side of the modular conveyor belt at a second number of windings or storeys placed above one another, wherein the second number is lower than or equal to the first number.
- said drive mechanism is provided with one or more of the above- mentioned measures or aspects named in the various embodiments.
- Figure 1 shows a view of an embodiment of a helical conveyor according to the state of the art
- Figure 2 shows a view in cross-section of the helical conveyor according to figure 1 ;
- Figure 3 shows a schematic top view of an exemplary embodiment of a helical conveyor according to the invention
- Figure 4 shows a schematic top view of a second exemplary embodiment of a helical conveyor according to the invention
- Figures 5A and 5B show a schematic side view of exemplary embodiments of the helical conveyor according to the invention
- Figures 6 and 7 show a view in cross-section of an exemplary embodiment at the location of a winding or storey of a helical conveyor with drive by a toothed wheel according to the invention
- Figure 8 shows a view in cross-section of an exemplary embodiment at the location of a winding or storey of a helical conveyor with drive by a drive chain according to the invention
- Figures 9A and 9B show detailed views of the drive chain and its engagement onto a conveyor belt.
- Figure 1 shows a helical conveyor according to the state of the art consisting of a frame of girders 1 and posts 2. Onto the posts 2 that have been positioned according to a polygonal, inwardly oriented holders 3 are disposed which by means of a helical path 4 offer support to a modular conveyor belt 5. Within the helical path 4 a drum 6 is positioned which can rotatably be driven about a vertical axis 7 by means of a motor (not shown). The drum 6 is covered with spaced apart substantially vertical beams 9. When the modular conveyor belt 5 is kept at the right tension, the rotating drum 6 takes along the conveyor belt 5. Some intentional slippage occurs in the process. In figure 2, the known helical conveyor is shown in cross-section, along a plane substantially transverse to the vertical axis 7.
- Figure 3 shows a first exemplary embodiment of a helical conveyor 10 according to the invention.
- Figure 3 shows a top view that extends substantially transverse to the axis of symmetry of the helical conveyor 10.
- the helical conveyor 10 according to this first exemplary embodiment comprises a frame comprising girders 11 and posts 12. On the posts 12 outwardly oriented outriggers 13 are disposed, which by means of guides 14 that are placed in a helical path on the outriggers 13, offer support to the conveyor belt 15.
- a number, in this example four, freely rotatable support rollers 16 are disposed for having a side 151 of the modular conveyor belt 15 facing the inner side of the helical path supporting against it.
- the support rollers 16 are placed along a substantially vertical axis so as to be freely rotatable.
- the support rollers 16 are for instance connected at their upper and lower sides to further girders (not shown) of the frame.
- the view of figure 3 shows a further advantage of the device according to the invention.
- the frame namely can be substantially situated within the helical path.
- the modular conveyor belt 15 can easily be placed on the guides 14 of the helical path.
- the modular belt lies unfastened, particularly detached on the guides 14 of the helical path.
- the helical conveyor 10 is provided with a drive mechanism in the form of a toothed wheel 17 which engages at an outwardly facing side 152 of the modular conveyor belt 15.
- the toothed wheel 17 is placed substantially radially opposite one of the support rollers 16, as shown in figure 3.
- the side of the modular conveyor belt 15 facing the outer side of the helical path is provided with openings 154 that offer room for engagement of teeth 171 of the toothed wheel 17.
- the toothed wheel 17 is rotatably driven about a vertical axis by a motor M1 , as schematically shown in figure 5A.
- FIG. 4 shows a second exemplary embodiment of a helical conveyor 20 according to the invention.
- This second exemplary embodiment also comprises a frame provided with girders 21 and posts 22.
- outriggers 23 are disposed, which are provided with guides 24 forming a helical path for having the conveyor belt 25 supporting against it.
- the posts 22 situated near the helical path are provided with freely rotatable support rollers 26.
- the freely rotatable support rollers 26 substantially do not extend over the full height of the helical conveyor 20, but only at the location of the helical path are the posts 22 provided with support rollers of a limited height that are adapted for adequately having a side 251 of the modular conveyor belt 25 facing the inner side of the helical path supporting against them.
- Said combination of vertical posts 22 with support rollers 26 placed thereon is schematically shown in figure 5B.
- a support roller 261 is placed opposite the drive mechanism 27.
- the drive mechanism 27 according to said second exemplary embodiment comprises two spaced apart toothed wheels 28 and a drive chain 29 placed around them.
- a side of the conveyor belt 25 facing the outer side of the helical path is provided with recesses or openings 254 for accommodating vertically extending pins 291 of the drive chain 29 therein.
- a number of the pins 291 will continually be placed in the recesses 254, as a result of which a drive takes place along the trajectory situated between the first and second toothed wheels 28.
- a drive mechanism M2 such as an electromotor
- the support roller 261 placed opposite the drive mechanism 27 is placed substantially radially with respect to a plane of symmetry 271 of the drive mechanism 27.
- the first and second toothed wheels 28 are placed substantially mirror symmetrical with respect to the plane of symmetry 271 .
- the support roller 261 placed substantially radially opposite the drive mechanism 27 can be designed having a larger diameter such as the support roller 261 of figure 4.
- the other support rollers 26 can be designed lighter, optionally having a smaller diameter.
- a further exemplary embodiment of the helical conveyor according to the invention may also comprise a single freely rotatable support roller. That means a comparable drum 6, as known in the art, wherein the drum 6 according to an embodiment of the invention, is positioned so as to be freely rotatable, in combination with a drive mechanism placed at the outer side of the helical path.
- the conveyor belt 15, 25 lies detached on top of the guides 13, 23, that have been placed in a helical path.
- This situation is schematically shown in figures 6, 7 and 8.
- the freely rotatable support roller 16, 26 is placed at a side of the modular conveyor belt 15, 25 situated within the helical path.
- Radially opposite the support roller 16, 26 the drive mechanism 17, 28 is placed that is operationally coupled to a side of the conveyor belt 15, 25 facing the outer side of the helical path, as described above.
- the conveyor belt 15, 25 near its end facing the outer side of the helical path is supported by a guide 13, 23.
- the drive mechanism 17, 28 is furthermore provided with a first confining element 31 extending radially above the end 152, 252 of the conveyor belt 15, 25 situated towards the outer side of the helical path. Because of said first confining element it can be prevented that the conveyor belt 15, 25 is able to fold upwards as a result of which the operational connection between the conveyor belt 15, 25 and the drive element 17, 28 might get lost.
- the first confining element 31 can rotate along with the drive mechanism 17, 28.
- first confining element 31 is provided with an inclined piloting edge 31 1 for passing the side 152, 252 of the conveyor belt 15, 25 under the first confining element 31 .
- first confining element 31 is spaced apart from the drive element 17, 28 to offer room to the conveyor belt 15, 25 running inclined in its helical path.
- the drive mechanism 17, 28 and particularly its toothed wheels is provided with a first confining element 31 as well as a second confining element 32.
- Both confining elements 31 , 32 extend radially over the side 152, 252 of the conveyor belt 15, 25, so that the side 152, 252 is confined between the first and second confining element 31 , 32.
- Both confining elements 31 , 32 are provided with an inclined edge 31 1 , 321 for guiding the side 152, 252 of the conveyor belt 15, 25 towards the drive element 17, 28.
- the confining elements 31 , 32 are spaced apart from the drive element 17, 28 in order to offer room to the conveyor belt 15, 25 running inclined in its helical path.
- the drive chain is provided with substantially vertically extending pins 291 that are connected one to the other by means of links. Said links also serve as first confining element 41 and second confining element 42 for confining the side 252 of the conveyor belt 25, as shown in figure 8, therebetween.
- the conveyor belt 25 is a link belt, as for instance known from international patent application WO 2003/093147.
- the individual modules 251 are coupled in series by means of connection rods 252.
- the modules 251 can be moved with respect to each other so that the modules 251 on the one hand are placed substantially parallel to each other when going through a substantially straight part of the conveyor path, and on the other hand are placed at an angle to each other when going through a curved part of the conveyor path, particularly when going through the helical part of the conveyor path.
- the modules 251 are placed at a small angle to each other, as a result of which openings 254 arise at the outer curve into which openings the pins 291 of the drive chain 29 can be placed.
- the links 41 , 42 of the drive chain 29 are placed at such a distance from each other, that between the links 41 , 42 sufficient room is offered to the conveyor belt 25 running inclined in its helical path.
- the helical conveyor according to the invention may be provided with several drive mechanisms that are placed at a periphery.
- a drive mechanism placed adjacent to a first helical conveyor can also drive a further adjacently placed second helical conveyor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2001010A NL2001010C2 (nl) | 2007-11-16 | 2007-11-16 | Spiraaltransporteur. |
PCT/NL2008/050725 WO2009064184A1 (en) | 2007-11-16 | 2008-11-13 | Helical conveyor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2212222A1 true EP2212222A1 (de) | 2010-08-04 |
Family
ID=39493632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08850602A Withdrawn EP2212222A1 (de) | 2007-11-16 | 2008-11-13 | Schneckenförderer |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2212222A1 (de) |
NL (1) | NL2001010C2 (de) |
WO (1) | WO2009064184A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016137316A1 (en) | 2015-02-26 | 2016-09-01 | Kaak Groep B.V. | Linked conveyor belt and method of manufacturing a linked conveyor belt |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTV20110060A1 (it) * | 2011-05-10 | 2012-11-11 | Alit S R L | Dispositivo di trasmissione del moto per il traino di nastri trasportatori e per nastri trasportatori a spirale in particolare |
ITPD20130341A1 (it) * | 2013-12-16 | 2015-06-17 | Alit S R L | Nastro trasportatore particolarmente per l'industria alimentare |
WO2017218212A1 (en) * | 2016-06-15 | 2017-12-21 | Laitram, L.L.C. | Flat-top side-drive modular conveyor belt |
DE102020004666B3 (de) * | 2020-07-31 | 2021-07-15 | Lipsia Automation GmbH | Trommelantrieb für rotierende Trommeln |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8702276A (nl) * | 1987-09-24 | 1989-04-17 | Willibrordus Kaak Stephanus | Spiraaltransporteur. |
IT1271991B (it) * | 1993-03-08 | 1997-06-10 | Tecno Pool Spa | Convongliatore a catene perfezionato |
ITRE20010030U1 (it) * | 2001-08-03 | 2003-02-03 | Frigor Box S R L | Sistema di traino tipicamente per nastri e tappeti trasportatori. |
US20030234162A1 (en) * | 2002-06-19 | 2003-12-25 | Laitram, L.L.C. | Boost drive for a modular plastic conveyor belt |
US6578704B1 (en) * | 2002-11-18 | 2003-06-17 | The Laitran Corporation | Belts and belt modules for spiral conveyors |
-
2007
- 2007-11-16 NL NL2001010A patent/NL2001010C2/nl active Search and Examination
-
2008
- 2008-11-13 WO PCT/NL2008/050725 patent/WO2009064184A1/en active Application Filing
- 2008-11-13 EP EP08850602A patent/EP2212222A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2009064184A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016137316A1 (en) | 2015-02-26 | 2016-09-01 | Kaak Groep B.V. | Linked conveyor belt and method of manufacturing a linked conveyor belt |
US10301116B2 (en) | 2015-02-26 | 2019-05-28 | Kaak Groep B.V. | Linked conveyor belt and method of manufacturing a linked conveyor belt |
Also Published As
Publication number | Publication date |
---|---|
NL2001010C2 (nl) | 2009-05-19 |
WO2009064184A1 (en) | 2009-05-22 |
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