CA2008718C - Belt conveyor - Google Patents
Belt conveyorInfo
- Publication number
- CA2008718C CA2008718C CA 2008718 CA2008718A CA2008718C CA 2008718 C CA2008718 C CA 2008718C CA 2008718 CA2008718 CA 2008718 CA 2008718 A CA2008718 A CA 2008718A CA 2008718 C CA2008718 C CA 2008718C
- Authority
- CA
- Canada
- Prior art keywords
- belt
- force
- conveyor
- edge portion
- deflecting roller
- 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 - Fee Related
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- Structure Of Belt Conveyors (AREA)
- Belt Conveyors (AREA)
Abstract
A belt conveyor comprises an endless belt (1) with two force-absorbing members (2, 3) extending throughout the entire length of the belt. These members are each connected to a respective edge portion of the belt and project from the same side of the belt when this is in the straightened state. Support rollers axe disposed for supporting the belt along at least a part of the conveying path. Each force-absorbing member (2, 3) is connected to its belt edge portion via a hinge portion enabling said member to turn through about ~90° relative to said belt edge portion for guiding the belt about a deflecting roller (13) whose axis (14) is substantially perpendicular to the plane of the adjacent conveyor belt part, the two forge-absorbing members being turned in the same direction relative to the respective belt edge portion and located at substantially the same distance from the axis of the deflecting roller.
Description
~rr~T c~orw~~co~
The present invention re~.ates to a belt conveyor com-prising an endless belt wa.th two force-absorbing members extending throughout the enCire length of the belt and be-ing each connected to a respective edge portion of the belt and projecting from the same side of the belt when this is in the straightened state, and support rollers for supportiry the belt along at least a part of the conveying path.
Belt conveyor's of this type are previously known from, for example, US-A~-3,164,238 and SE-c-?809688-0. They are advantageous in that they aFford a closed conveyance of goads, require but little space, and can be opened for turning about arid emptying over a deflecting roller.
Along the goods conveyance path, the belt is carried via the two force-absprbing members which have but low ex-tensibility in the longitudinal diraation. As a result, difficulties arise in horizantai curves along the belt path where the belt is closed, in that the force-absorbing members are conducted immediately adjacent one another. If the force-absorbing members are conducted in side-by-side relation through a horizontal curve, they will be forced to follow paths of different lengths, which is undesir-able. If, instead the two force-absorbing members are con-ducted abovca one another through a horizontal curve, they will, it is true, have the same length o~ travel, but ad-,~aaent belt parts will be subjected to heavy wear, bending or elongation, whereby these parts are rapidly worn out.
It therefore is the object of the present invention to provide a belt conveyor which is of the type referred to in the introduction and which can be conducted through sharp hor~,zontaZ curves without causing the force-absorb--ing elements to follow paths of different lengths, and without causing fatigue of the belt parts adjacent these members.
The present invention re~.ates to a belt conveyor com-prising an endless belt wa.th two force-absorbing members extending throughout the enCire length of the belt and be-ing each connected to a respective edge portion of the belt and projecting from the same side of the belt when this is in the straightened state, and support rollers for supportiry the belt along at least a part of the conveying path.
Belt conveyor's of this type are previously known from, for example, US-A~-3,164,238 and SE-c-?809688-0. They are advantageous in that they aFford a closed conveyance of goads, require but little space, and can be opened for turning about arid emptying over a deflecting roller.
Along the goods conveyance path, the belt is carried via the two force-absprbing members which have but low ex-tensibility in the longitudinal diraation. As a result, difficulties arise in horizantai curves along the belt path where the belt is closed, in that the force-absorbing members are conducted immediately adjacent one another. If the force-absorbing members are conducted in side-by-side relation through a horizontal curve, they will be forced to follow paths of different lengths, which is undesir-able. If, instead the two force-absorbing members are con-ducted abovca one another through a horizontal curve, they will, it is true, have the same length o~ travel, but ad-,~aaent belt parts will be subjected to heavy wear, bending or elongation, whereby these parts are rapidly worn out.
It therefore is the object of the present invention to provide a belt conveyor which is of the type referred to in the introduction and which can be conducted through sharp hor~,zontaZ curves without causing the force-absorb--ing elements to follow paths of different lengths, and without causing fatigue of the belt parts adjacent these members.
This and further objec:CS o~ the invention are achiev-ed in that the belt conveyor is characterised in that each force--absorbing member is connected to its bell edge por-tion via a narrow hinge portion enabling said mWt7bex to S tuxn through about +90° relative to said belt edge portion for guiding the bait about a deflecting roller whose axis is substantially perpendicular to the plane of the adja-cent conveyor belt part, the two Force-absorbirsg members being turned in the same direction relative to the respec-1.0 tive belt edge portion and located at substantially the same distance fro~t~ the axis of the deflecting roller. In this manner, also the bag-shaped part of the belt between the force-absorbing members will then with its centre fol-1ow a path which is spaced from the axis of the defleoting 15 roller by the same distance as the force-absorbing mem-bers, whereby elongation of the belt is substantially avoided so that the belt can be conducted about a deflect-ing roller at a very small radius at an optional angle of wrap of up tca 180°. because of the hinge portions accord-20 ing to the invention, substantially the entire belt, in-cluding the foxce-absorbing members, can move at one and the same radial distance about the deflecting roller.
Tho deflecting roller pre~exably is a V-belt pulley.
It may have a single V-halt groove, in which case the two 25 forar~-absorbing members together form a V-belt fitting into one V-belt c~xoove, or two adjacent V-belt grooves, in which case each force-absorbing member forms a V-belt fitting into the respective groove.
To obtain clearance betwean tho support rollers and 30 the belt poz~tions adjacent the foxce-absorbing members, these member3 are suitably polygonal in cross-section, with an acute anc~7.e between the Gwo sides of the polygon that connect to the hinge portion.
;;urthexmore, in a preferred embodiment, each force-35 absorbing member has a V-belt shape where the broad side of the V-belt is an extension of the belt in its stxair.,~htened state.
iG~o'~' ~~t~~~
Tho deflecting roller pre~exably is a V-belt pulley.
It may have a single V-halt groove, in which case the two 25 forar~-absorbing members together form a V-belt fitting into one V-belt c~xoove, or two adjacent V-belt grooves, in which case each force-absorbing member forms a V-belt fitting into the respective groove.
To obtain clearance betwean tho support rollers and 30 the belt poz~tions adjacent the foxce-absorbing members, these member3 are suitably polygonal in cross-section, with an acute anc~7.e between the Gwo sides of the polygon that connect to the hinge portion.
;;urthexmore, in a preferred embodiment, each force-35 absorbing member has a V-belt shape where the broad side of the V-belt is an extension of the belt in its stxair.,~htened state.
iG~o'~' ~~t~~~
To prevent any ~ubstantiaz c~langatian of the force-absoa-bing members in Lhe longitudinal direction, they are preferably reinforced, The reinforcement may be a rope, such as a wire, which is circular in cross--section. Alter-natively, the reinforcement may be substantially planar in cross-section and disgosed in a plane substantially per-pendicular to the belt in the straightened state thereof.
The invention wall be described ~.n more detail here-inafter, reference being had to the accompanying drawings.
Fig. 1 is a cross-sectional view of an endless conveyor belt that can be used with the belt conveyor according to the invention. Fig. 2 is a cross-sectional view of the belt in Fig. 1 and shows the belt/ in its closed state sup-ported by support rollers. Fig. 3 is a cross-sectional view of the belt in Fig. 1 and shows how the belt accord-ing to the invention is conducted in a horizontal curve over a deflecting roller. Fig. ~ is a schematic perspec-tive view showing the deflecting roller according to Fig. 3 and adjacent parts of the belt conveyor according to the invention. figs. S-7 correspond to Figs. 1-3, but show a more preferxod embodiment o~ the belt and the de flecting roller, fig. 8 corresponds to Fig. 7, but shows still another variant of the belt and the deflecting rol lex~. rig. ~ illustrates on a larger scale three different embodiments of the hinge portion according to the inven-tion.
For better clarity, the dimensions of the force-absorbing members shown in Figs. 2-9 and 6-8 are exagger-ated relative to the other belt dimensions, especially the belt width.
A belt conveyor 1 as shown in Figs. 1-~ consists mainly of s flexible and extensible material, such as rub-ber. each edge portion of the belt is conn4cted to a forco--absorbing member 2, 3 extending throughout the en-tire length of the beat and capable of absorbing both ten-sile forces and load forces. F~ccording to the invention, the members 2, 3 are canrrected Co the respective belt edge portion via a narrow hinge portion 4, 5 enabling 'the memo ber 2, 3 to be turned vh~cough approximately ~90° relative to the belt edge portion, as shown by dash lines t4 the right in Fig. 1.
The intermediate portion 6 of the belt 1, between the hinge portions 4, 5, may preferably have a fabric insert with the fibres of the fabric being directed ~or example +~5° relative to the longitudinal direction of the belt 1.
'Ihe fabric insert does not absorb tensile forces, hut merely selves to distribute thG load forces. The force-absorbing members 2, 3 are also reinForced, for example with a rope 7, 5 in thc~ foam of, a steel wire.
The belt 1 may be in the state shown in Fig. 1 fluxing its movement about, ~or example, a turning roller in the form of a turna.ng drum with peripheral grooves ~or receiv-ing the force-absorbi~ig members 2, 3. Along the sfix~aight reaches of the goods conveyance path, on the other hand, the belt is preferably closed in the manner shown in Fig. 2. l~fere, the bell: 1 i:~ supported via the force-absorbing members ~, 3 by two aupport rollers 9, 10 which in turn are rotatably mounted in a Frame (not shown) about axes of rotairion 11, ~.2 shown by dash lines.
To obtain clearance between the support rollers 9, 10 and the band portions adjacent the force-absorbing members 2, 3, the angles A shown in Fig. 2 are ~rcute angles. Gene rally, the force-absorbing members 2, 3 may be polygonal in cross-se.cLzon and then have an acute angle between the two sides of the polygon which connect td the respective hinge portion ~, 5.
Owing to the h~.nge poations 4, 5 which are distinct hinge points, i.e. they have a limited extent perpendicu-lar to the longitudinal direction o.f the belt 2, the belt 1, as shown in Fig. ;i, can be conducted in closed shape through a horizontal curve about a de~7.eating roller 13 having a ve~'tical axis of rotation 14. In this case, the deflecting roller 13 has a V-slya~red groove profile For en-gagecnent with the force-absorbing members 2, 3 which axe turned through X30° :.n the same d~.rection relative to the respective belt edge portion and, furthermore, assume essentially the same mutual posit~.on as in Fig. 2. In other words, the mernbers 2, 3 axe turnod substantially in x°nlation to a centre line through the bag-shaped part of the belt 1. As will appear rrom Fig. 3, the force-absorb-ing members are at substantially the same distance frpm the axis of rotation of the deflecting roller 13, and this applies a7.so to the r~:a.nforcing ropes 7, $ of the members 2, 3, and to the intermediate portion of the belt 1 which lies between the hinge portions 4, 5 and therefore is not subjected to any substanla al elongation. As has been ind~.-cated by dash lines in gig. 3, the belt ~. may also be con-ducted through a horizontal curve in the opposite direr-tion, ~,n that the force-absorbing members 2, 3 are turned substantially through 9Q° from the position shown in Fig. 2 into the opposite direction relative to the posi-tion shown by full lines in Fig. 3. The X30° turn provides for complete symmetry regarding the members 2, 3 relative 2Q to the deflecting roller 23 and 'the axis of rotation 14 thereof.
The transition from the support rol,lezs 9, 10 to the def~.ecting rollex~ 13 is shown schematically in Fic~. ~4. Ad-~
d~.tional rollers (not shown) may be rac~uired for guiding the force-absorbing members 2, 3 into engagement with the deflecting roller 13, or vice versa.
Although the deflactinc~ z~ollar 13 in the above de-scription is said to have a vertical axis of rotation to facilitate conducting the be7.t through a horizontal curve, its axis of rotation l~ may, of course, also have a diffe-rent spatial orientation as long as the axis J,4 is sub-stantially perpendicular to the plane of the adjacent con-veyor belt: part, as shown tn Fig.
rigs. 5-7 illustrate another preferred embodiment of a conveyor belt 1' and a do~7,ecting roller 13' accord~.ng to the inveni~ion. Tire belt i' is identical with the one shown in Figs. 1-4, excepting the cross-sectional shape of ~~Se'~~I°~.~
its force-absorb~,ng members 2', 3'. Zn Figs. S°7, the ~o.rce-absorbing members ?', 3' also have a different re-inforcement 7', 8' than the members 2, ~ in Figs. 1--4, but this difference is inunaterial to the function of the embo--diment according to Figs, 5-7. In their position imme-diately adjacent one another (as shown in Figs. 6 and 7), in which they support the belt 1', the Force-absorbing members 2', 3' together corm a V-rope having a top angle B. To be able to receive the V-rope formed by the members 2', 3', the deflecting roller 13' is formed as a V-belt pulley, the groove ang~.e of which males the angle s. Fur--thex~more, the groove has, in conventional manner, a depth such that the members 2', 3' do not come in contact with the bottom of the groove.
IS zt goes without saying that the V-shape of the mem-bers 2', 3' greatly improves the running characteristics Of the conveyor belt ~..
°Ihe reinforcement 7', 8' of the members 2', ~' is a planar reinforcement. More particularely, the plane of the reinforcecnent is substantially perpendicular to the plane o~ the belt 1' in the straightened state of the belt. This orientation of the reinforcoment is advantageous both along wubstantially straight reaches of the convoying path where the belt is carried in the manner shown in Fig. 6, because the reinforcement 7', 8' is here ec~ua~.ly loaded in every part, and about: the V-belt pulley 13' because here all parts o~ the reinforcement 7°, 8' are at the same distance from the axis of rotakion 14.
As a further variant, each force-absorbing member may ba in the ~o.rm of a V-rope 2", 3" as shown in Fig. 8 where the deflecting roller I3" having the axis of rotation 14 is formed with double grooves each receiving one of the members 2" $".
Fig. 9 illustrates three different hangs connections 3S between the intermediate portion 6 of the conveyor belt 1 and, for example, the fcarce~-absorb~.ng member ~' vza the hinge portitin 5. In Fig. 9a, the hinge port~,o~i 5 is a sa--~~~'~?'~1~.~
parate member fixedly connected, far example by vulcanisa-tion, with both the member 3' and the side edge of the in, termediate portion 6 of the belt 1, zn this manner, each member 3', 5 and 6 can be conve:nienLly given the desired Characteristics.
However, the hinge: portion 5 may be formed as an in-tegrated part of the belt 1, For example by making it in one giece with and at Lhi~ same time as the intermediate portion &, as shown in Fig. 9b and c. zn this instance, the hinge portion 5 can be given its flexibility by making it from some pliable material, by reducing zts thickness and/or by om:l.tting the reinforcement, although this is not especially shown in Figs. 9b and c. In the embodiment ac-cording to Fig. 9b, tlae member 3' is manufactured sepa-rately, and the members 8', 5 and 6 in one piece. Finally, the member 3' is joined to the member 8'.
The variant shown in Fig. 9c mainly carresponds to the one shown in Fig. 9b, excepting the location of the re.i.nforaement 8' .
In all instances, the hinge portion 5, besides its flex.tbility, preferably also has a substantial. extensibi-lity in the longitudinal and/or transverse direction. Of thG utmost importance is that the hinge portion 5 is a distinct hinge point about which the belt will flex natu-rally, In othez~ words, the hinge portion must have an es-sentially higher f~.exibility than the remaining parts of the bei.t 1.
It will be appr~eciateti that a variety of modifiaa--tions of the belt conveyor embodiments described above are obviously possible within the scope of the invention. For example, it is possible to change the material cho3en for the conveyor belt, the design of the forr_e-absorbing mem~
bars, and the shape and location of the reinforcement. It may also be necessary to complete the embodiments achema-tically illustrated wii:h further guide rollers or pressure rollers to make the conveyor belt and the force:-.absorbing members follow the deslxed path. According to a further modification, the suppar~ xollers 9, 10 and/or the gu~.de rollers may be cambered, and the Force-absorbing rnemhers max also be ax~,al7.y spaced apart: about the deflecting xol-ler.
a. o ~. 5 ~5
The invention wall be described ~.n more detail here-inafter, reference being had to the accompanying drawings.
Fig. 1 is a cross-sectional view of an endless conveyor belt that can be used with the belt conveyor according to the invention. Fig. 2 is a cross-sectional view of the belt in Fig. 1 and shows the belt/ in its closed state sup-ported by support rollers. Fig. 3 is a cross-sectional view of the belt in Fig. 1 and shows how the belt accord-ing to the invention is conducted in a horizontal curve over a deflecting roller. Fig. ~ is a schematic perspec-tive view showing the deflecting roller according to Fig. 3 and adjacent parts of the belt conveyor according to the invention. figs. S-7 correspond to Figs. 1-3, but show a more preferxod embodiment o~ the belt and the de flecting roller, fig. 8 corresponds to Fig. 7, but shows still another variant of the belt and the deflecting rol lex~. rig. ~ illustrates on a larger scale three different embodiments of the hinge portion according to the inven-tion.
For better clarity, the dimensions of the force-absorbing members shown in Figs. 2-9 and 6-8 are exagger-ated relative to the other belt dimensions, especially the belt width.
A belt conveyor 1 as shown in Figs. 1-~ consists mainly of s flexible and extensible material, such as rub-ber. each edge portion of the belt is conn4cted to a forco--absorbing member 2, 3 extending throughout the en-tire length of the beat and capable of absorbing both ten-sile forces and load forces. F~ccording to the invention, the members 2, 3 are canrrected Co the respective belt edge portion via a narrow hinge portion 4, 5 enabling 'the memo ber 2, 3 to be turned vh~cough approximately ~90° relative to the belt edge portion, as shown by dash lines t4 the right in Fig. 1.
The intermediate portion 6 of the belt 1, between the hinge portions 4, 5, may preferably have a fabric insert with the fibres of the fabric being directed ~or example +~5° relative to the longitudinal direction of the belt 1.
'Ihe fabric insert does not absorb tensile forces, hut merely selves to distribute thG load forces. The force-absorbing members 2, 3 are also reinForced, for example with a rope 7, 5 in thc~ foam of, a steel wire.
The belt 1 may be in the state shown in Fig. 1 fluxing its movement about, ~or example, a turning roller in the form of a turna.ng drum with peripheral grooves ~or receiv-ing the force-absorbi~ig members 2, 3. Along the sfix~aight reaches of the goods conveyance path, on the other hand, the belt is preferably closed in the manner shown in Fig. 2. l~fere, the bell: 1 i:~ supported via the force-absorbing members ~, 3 by two aupport rollers 9, 10 which in turn are rotatably mounted in a Frame (not shown) about axes of rotairion 11, ~.2 shown by dash lines.
To obtain clearance between the support rollers 9, 10 and the band portions adjacent the force-absorbing members 2, 3, the angles A shown in Fig. 2 are ~rcute angles. Gene rally, the force-absorbing members 2, 3 may be polygonal in cross-se.cLzon and then have an acute angle between the two sides of the polygon which connect td the respective hinge portion ~, 5.
Owing to the h~.nge poations 4, 5 which are distinct hinge points, i.e. they have a limited extent perpendicu-lar to the longitudinal direction o.f the belt 2, the belt 1, as shown in Fig. ;i, can be conducted in closed shape through a horizontal curve about a de~7.eating roller 13 having a ve~'tical axis of rotation 14. In this case, the deflecting roller 13 has a V-slya~red groove profile For en-gagecnent with the force-absorbing members 2, 3 which axe turned through X30° :.n the same d~.rection relative to the respective belt edge portion and, furthermore, assume essentially the same mutual posit~.on as in Fig. 2. In other words, the mernbers 2, 3 axe turnod substantially in x°nlation to a centre line through the bag-shaped part of the belt 1. As will appear rrom Fig. 3, the force-absorb-ing members are at substantially the same distance frpm the axis of rotation of the deflecting roller 13, and this applies a7.so to the r~:a.nforcing ropes 7, $ of the members 2, 3, and to the intermediate portion of the belt 1 which lies between the hinge portions 4, 5 and therefore is not subjected to any substanla al elongation. As has been ind~.-cated by dash lines in gig. 3, the belt ~. may also be con-ducted through a horizontal curve in the opposite direr-tion, ~,n that the force-absorbing members 2, 3 are turned substantially through 9Q° from the position shown in Fig. 2 into the opposite direction relative to the posi-tion shown by full lines in Fig. 3. The X30° turn provides for complete symmetry regarding the members 2, 3 relative 2Q to the deflecting roller 23 and 'the axis of rotation 14 thereof.
The transition from the support rol,lezs 9, 10 to the def~.ecting rollex~ 13 is shown schematically in Fic~. ~4. Ad-~
d~.tional rollers (not shown) may be rac~uired for guiding the force-absorbing members 2, 3 into engagement with the deflecting roller 13, or vice versa.
Although the deflactinc~ z~ollar 13 in the above de-scription is said to have a vertical axis of rotation to facilitate conducting the be7.t through a horizontal curve, its axis of rotation l~ may, of course, also have a diffe-rent spatial orientation as long as the axis J,4 is sub-stantially perpendicular to the plane of the adjacent con-veyor belt: part, as shown tn Fig.
rigs. 5-7 illustrate another preferred embodiment of a conveyor belt 1' and a do~7,ecting roller 13' accord~.ng to the inveni~ion. Tire belt i' is identical with the one shown in Figs. 1-4, excepting the cross-sectional shape of ~~Se'~~I°~.~
its force-absorb~,ng members 2', 3'. Zn Figs. S°7, the ~o.rce-absorbing members ?', 3' also have a different re-inforcement 7', 8' than the members 2, ~ in Figs. 1--4, but this difference is inunaterial to the function of the embo--diment according to Figs, 5-7. In their position imme-diately adjacent one another (as shown in Figs. 6 and 7), in which they support the belt 1', the Force-absorbing members 2', 3' together corm a V-rope having a top angle B. To be able to receive the V-rope formed by the members 2', 3', the deflecting roller 13' is formed as a V-belt pulley, the groove ang~.e of which males the angle s. Fur--thex~more, the groove has, in conventional manner, a depth such that the members 2', 3' do not come in contact with the bottom of the groove.
IS zt goes without saying that the V-shape of the mem-bers 2', 3' greatly improves the running characteristics Of the conveyor belt ~..
°Ihe reinforcement 7', 8' of the members 2', ~' is a planar reinforcement. More particularely, the plane of the reinforcecnent is substantially perpendicular to the plane o~ the belt 1' in the straightened state of the belt. This orientation of the reinforcoment is advantageous both along wubstantially straight reaches of the convoying path where the belt is carried in the manner shown in Fig. 6, because the reinforcement 7', 8' is here ec~ua~.ly loaded in every part, and about: the V-belt pulley 13' because here all parts o~ the reinforcement 7°, 8' are at the same distance from the axis of rotakion 14.
As a further variant, each force-absorbing member may ba in the ~o.rm of a V-rope 2", 3" as shown in Fig. 8 where the deflecting roller I3" having the axis of rotation 14 is formed with double grooves each receiving one of the members 2" $".
Fig. 9 illustrates three different hangs connections 3S between the intermediate portion 6 of the conveyor belt 1 and, for example, the fcarce~-absorb~.ng member ~' vza the hinge portitin 5. In Fig. 9a, the hinge port~,o~i 5 is a sa--~~~'~?'~1~.~
parate member fixedly connected, far example by vulcanisa-tion, with both the member 3' and the side edge of the in, termediate portion 6 of the belt 1, zn this manner, each member 3', 5 and 6 can be conve:nienLly given the desired Characteristics.
However, the hinge: portion 5 may be formed as an in-tegrated part of the belt 1, For example by making it in one giece with and at Lhi~ same time as the intermediate portion &, as shown in Fig. 9b and c. zn this instance, the hinge portion 5 can be given its flexibility by making it from some pliable material, by reducing zts thickness and/or by om:l.tting the reinforcement, although this is not especially shown in Figs. 9b and c. In the embodiment ac-cording to Fig. 9b, tlae member 3' is manufactured sepa-rately, and the members 8', 5 and 6 in one piece. Finally, the member 3' is joined to the member 8'.
The variant shown in Fig. 9c mainly carresponds to the one shown in Fig. 9b, excepting the location of the re.i.nforaement 8' .
In all instances, the hinge portion 5, besides its flex.tbility, preferably also has a substantial. extensibi-lity in the longitudinal and/or transverse direction. Of thG utmost importance is that the hinge portion 5 is a distinct hinge point about which the belt will flex natu-rally, In othez~ words, the hinge portion must have an es-sentially higher f~.exibility than the remaining parts of the bei.t 1.
It will be appr~eciateti that a variety of modifiaa--tions of the belt conveyor embodiments described above are obviously possible within the scope of the invention. For example, it is possible to change the material cho3en for the conveyor belt, the design of the forr_e-absorbing mem~
bars, and the shape and location of the reinforcement. It may also be necessary to complete the embodiments achema-tically illustrated wii:h further guide rollers or pressure rollers to make the conveyor belt and the force:-.absorbing members follow the deslxed path. According to a further modification, the suppar~ xollers 9, 10 and/or the gu~.de rollers may be cambered, and the Force-absorbing rnemhers max also be ax~,al7.y spaced apart: about the deflecting xol-ler.
a. o ~. 5 ~5
Claims (8)
1.~A belt conveyor comprising an endless belt (1; 1') with two force-absorbing members (2, 3; 2'; 3') extending throughout the entire length of the belt and being each connected to a respective edge portion of the belt and projecting from the same side of the belt when this is in the straightened state, and support rollers (9, 10) for supporting the belt along at least a part of the conveying path, characterised in that each force-absorbing member (2, 3; 2'; 3') is connected to its belt edge portion via a narrow hinge portion (4, 5) enabling said member to turn through about ~90° relative to said belt edge portion for guiding the belt about a deflecting roller (13; 13', 13") whose axis (14) is substantially perpendicular to the plane of the adjacent conveyor belt part, the two force-absorbing members being turned in the same direction relative to the respective belt edge portion and located at substantially the same distance from the axis of the deflecting roller.
2. A belt conveyor as claimed in claim 1, characterised in that the deflecting roller (13') is a V-belt pulley, and that the two force-absorbing members (2', 3') together form a V-belt fitting into the V-belt pulley.
3. A belt conveyor as claimed in claim 1, characterised in that the deflecting roller (13") is a V-belt pulley with two adjacent V-belt grooves, and that each force-absorbing member (2", 3") forms a V-belt fitting into the respective groove.
4. A belt conveyor as claimed in any one of claims 1-3, characterised in that each force-absorbing member (2, 3; 2', 3'; 2", 3") is polygonal in cross-section, with an acute angle between the two sides of the polygon that connect to the hinge portion (4, 5).
5. A conveyer belt as claimed in claim 1, characterised in that each force-absorbing member (2, 3) has a V-belt shape where the broad side of the V-belt is an extension of the belt (1) in its straightened state.
6. A belt conveyor as claimed in any one of claims 1-5, characterised in that each force-absorbing member (2, 3; 2'; 3') is reinforced.
7. A belt conveyor as claimed in claim 6, characterised in that the reinforcement (7', 8') is disposed in a plane substantially perpendicular to the belt (1') in the straightened state thereof.
8. A belt conveyor as claimed in any one of claims 1-7, characterised in that the support rollers (9, 10) and/or any additional guide rollers are cambered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2008718 CA2008718C (en) | 1990-01-26 | 1990-01-26 | Belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2008718 CA2008718C (en) | 1990-01-26 | 1990-01-26 | Belt conveyor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2008718A1 CA2008718A1 (en) | 1991-07-26 |
| CA2008718C true CA2008718C (en) | 1999-12-14 |
Family
ID=4144137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2008718 Expired - Fee Related CA2008718C (en) | 1990-01-26 | 1990-01-26 | Belt conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2008718C (en) |
-
1990
- 1990-01-26 CA CA 2008718 patent/CA2008718C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2008718A1 (en) | 1991-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |