CA1100086A - Power curve construction - Google Patents
Power curve constructionInfo
- Publication number
- CA1100086A CA1100086A CA320,883A CA320883A CA1100086A CA 1100086 A CA1100086 A CA 1100086A CA 320883 A CA320883 A CA 320883A CA 1100086 A CA1100086 A CA 1100086A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- lug
- bearing
- lugs
- outer edge
- 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
Links
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- Belt Conveyors (AREA)
Abstract
Abstract In a curved conveyor belt system a plurality of hold-back lugs in spaced apart relation are secured to the outside edge of the conveyor system belt and bear against a continuous rail or strip that follows, at a vertical spatial displace-ment inwardly adjacent the belt outer edge, the functional conveyance portion of the belt path. The lug-rail cooperation results in resistance to lateral shifting of the belt towards the polar axis of the curve and introduces desired transverse tensile forces into the carrying surface of the belt so as to avoid transverse warping or buckling of the belt along the conveyance path.
Description
The present invention relates to a conveyor belt retainment structure for keeping a conveyor belt in position around a curved path.
Background of the Invention Presently known curved or power-turned conveyors utilize various systems for keeping a conveyor belt in posi-tion around a curved path. Such systems include guide chains mounted on one or both sides of the conveyor belt so as to direct the belt along the desired path. Also found are guide 10 rollers attached to the bottom surface of the belt which ~-engage cooperating guides in a conveyor bed, the rollers riding in guide c~annels located on the conveyor support frame.
Other systems have rollers mounted on the stationary conveyor framework to impart guidance forces on various portions of the ~-belt. Still other de~ices force the conveyor belt to travel in a curved path by means of transverse tension deviceæ, usually arranged around the radially outer edge of the belt.
Such devices comprise hooks or cleats attached to the belt and engaging a track, chain or raceway mounted on the outer edge 20 of the conveyor supporting mechanism.
The above devices are often unsatisfactory in that they are relatively complicated and, therefore, expensive;
tend to wear rapidly, and/or require freguent ad~ustments and part replacements. Yet further, undesirable safety factors, inherent in such systems, are introduced into the work environ-ment, including noisy operational levels and the continuous possibility of accidents due to exposed projecting and moving parts.
The fundamental principles of operation and construc-30 tion of the forego~ng known curved conveyor belt systems in-volve, within an arcuate frame, an endless belt of a type which may assume a suitable arcuate surface form~ mounted in ~
~1(1QQ86 longitudinal tension about a po~ered drive roller and a take-up roller, which are spaced apart in a radial pattern to define the termîni of the turn. The powered drive roller, usually by means of fr;ctional contact between the roller surface and the belt, imparts the necessary driving forces to the belt, moving it through its arcuate path.
It is an object of the present invention to provide effective means resistant to lateral shifting of a conveyor belt which will enable belt movement along a curved path without warping, buckling, or creasing of the carrying surface. It is another object of the present invention to provide the above resistance means on a laterally curved conveyor belt which is simple and relatively inexpensive to construct, install and maintain. Still another object of the present invention is to provide the above resistance means on a laterally curved conveyor belt which - operates in a relatively quiet manner during functional vement. Another object of the invention is to provide the above resistance means on a laterally curved conveyor belt ~hereby wear of the associated parts is minimized. A still further object of the present invention is to provide -~
the above resistance means on a laterally curved conveyor belt, which reduces the noise level and enhances the safety of the associated work
Background of the Invention Presently known curved or power-turned conveyors utilize various systems for keeping a conveyor belt in posi-tion around a curved path. Such systems include guide chains mounted on one or both sides of the conveyor belt so as to direct the belt along the desired path. Also found are guide 10 rollers attached to the bottom surface of the belt which ~-engage cooperating guides in a conveyor bed, the rollers riding in guide c~annels located on the conveyor support frame.
Other systems have rollers mounted on the stationary conveyor framework to impart guidance forces on various portions of the ~-belt. Still other de~ices force the conveyor belt to travel in a curved path by means of transverse tension deviceæ, usually arranged around the radially outer edge of the belt.
Such devices comprise hooks or cleats attached to the belt and engaging a track, chain or raceway mounted on the outer edge 20 of the conveyor supporting mechanism.
The above devices are often unsatisfactory in that they are relatively complicated and, therefore, expensive;
tend to wear rapidly, and/or require freguent ad~ustments and part replacements. Yet further, undesirable safety factors, inherent in such systems, are introduced into the work environ-ment, including noisy operational levels and the continuous possibility of accidents due to exposed projecting and moving parts.
The fundamental principles of operation and construc-30 tion of the forego~ng known curved conveyor belt systems in-volve, within an arcuate frame, an endless belt of a type which may assume a suitable arcuate surface form~ mounted in ~
~1(1QQ86 longitudinal tension about a po~ered drive roller and a take-up roller, which are spaced apart in a radial pattern to define the termîni of the turn. The powered drive roller, usually by means of fr;ctional contact between the roller surface and the belt, imparts the necessary driving forces to the belt, moving it through its arcuate path.
It is an object of the present invention to provide effective means resistant to lateral shifting of a conveyor belt which will enable belt movement along a curved path without warping, buckling, or creasing of the carrying surface. It is another object of the present invention to provide the above resistance means on a laterally curved conveyor belt which is simple and relatively inexpensive to construct, install and maintain. Still another object of the present invention is to provide the above resistance means on a laterally curved conveyor belt which - operates in a relatively quiet manner during functional vement. Another object of the invention is to provide the above resistance means on a laterally curved conveyor belt ~hereby wear of the associated parts is minimized. A still further object of the present invention is to provide -~
the above resistance means on a laterally curved conveyor belt, which reduces the noise level and enhances the safety of the associated work
2~ environment.
According to the invention there is provided in a curved conveyor belt system including: a conveyor belt frame; a driven endless conveyor belt supported on said frame, forming an arcuate sector, and having a radially outer edge; and guide means maintaining the lateral positlon of said belt during functional conveyance; the improvement comprls m g:
(a~ an elongated bearing strip secured to said frame, extending adjacent the outer edge of at least one fligh~ of said belt, and having a bearing surface spaced inwardly of said belt outer edge, said bearing surface heing oriented generally perpendicularly to said belt;
llOQQ~36 Cb~ a plurality of lugs attached to said belt in spaced apart relation along said belt outer edge;
~c) each lug having a lug bearing surface extending on only one side of said belt and in sliding engagement with said ~earing surface of said bearing strip;
(d) each lug including means forming a contact surface, said contact surface being oriented substantially horizontally; and ~e) a frame member including a horizontal contact surface extending adjacent said belt outer edge, said lug contact surface being adapted for sliding contact with said frame member contact surface and orienting said lugs to maintain said sliding engagement between said lug bearing surface and said bearing strip bearing surface.
Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings, wherein are set forth, 6y way of illustration and example, certain embodiments and features of this invention.
- Briéf Description-of the Drawings Figure 1 is a top plan view of an arcuate conveyor belt system embodying this invention wnth a portion broken away from the radially outer edge of the system support framework, showing the holdback lugs.
Figure 2 is a front elevational view of the conveyor belt system as shown in Figure 1.
Figure 3 is a top fragmentary view, on an enlarged scale, showing the holdback lug/bearing rail in sliding cooperation.
Figure 4 is a vertical sectional vîew, on enlarged scale, taken along line 4-4 in Figure 1, showing details of the holdback lug~
bearing construction.
Figure S is a vertical sectional view, similar to that of Figure 4, showing a modified form of the present invention.
llOQQ86 Description of the Preferred Embodiment Referring to the drawing~ in more detail, Figure 1 shows a conveyor belt system 1 used for guiding an arcuate conveyor belt 2 through a turn. The system, as illustrated, encompasses a sa degree turn but the arc of the turn may be varied, depending upon the turn desired.
The basic system 1 comprises a curved frame 3 having vertically extending, arcuate outer and inner supporting walls 4 and 5 respectively extending along the radially outer and inner edges 6 and 7 of the belt curved path. The frame 3 is also provided with a vertically directed, arcuate inner sideguard 8, which broadly defines the radially inner edge 7 of the belt 2 and a similar verti`cal, arcuate outer sideguard 9 concentric to the inner sideguard ~, and defining the radially outer edge 6 of the belt 2 at a posit;on interior to the periphery thereof. The sideguards 8 and 9, in this example, project above the carrying surface of the belt 2, throughout the 90 degree arc, primarily to prevent objects from falling off the edges of the belt as they are transported throughout the turn, however, they may be varied greatly in relative height without department from the scope of this invention. The outer sideguard 9, because of its relative interior position to the belt outer edge 6, is vertically displaced from the belt 2 and is attached by appropriate spaced gussets 10 to an intermediate frame member 11. As shown in Figure 4, the intermediate frame member 11 is suitably secured to the front outer supporting wall 4, as by bolts 12, and extends vertically above and horizontally over the belt inner edge 6, forming an enclosed channel or alleyway 13 which contains belt retaining structure 14 detailed below.
The intermediate frame member 11 also functions to shield the belt retaining structure from the intrusion of debris which may interfere with proper operation of the conveyor belt system.
The frame walls 4 and 5 support an arcuate, horizontally disposed frame member or bed 15 which extends throughout the length of llOQQ86 the turn and, in the embodiment illustrated, is adapted to support the upper flight or functional conveyance path of the belt 2 throughout the turn. The bed 15 laterally extends beyond the peripheral edges of the belt 2 and preferably includes a smooth contact surface 17 so as to keep resultant frictional forces between sliding parts at a minimum. Under-neath the bed 15 is a series of lateral return flight rollers 16, so positioned and mounted as to provide support for the belt 2 when in its return flight path.
The belt 2 is made of any suitable pliable, non-stretchable material using conventional manufacturing techniques. The belt may be cut from a single piece of belt mater;al with the proper arcuate shape so that it may be looped and fastened to form a single and endless curved belt. Such a bal~ when in an unfolded condition will preferably form the frustum of a hollow cone. The belt may also comprise a number of short, arcuate segments connected together with conventional fasteners to form the arcuate belt desired. The choice of material and construction technique for a belt to ke used in a given situation depends on various factors including: the type of objects to be conveyed, the effect of the belt surface on the objects conveyed, and belt speed.
The belt 2 is mounted on spaced and angularly aligned rollers or pulleys 20 and 21 mounted at the termini of the turn. The rollers 20 and 21 are rotatably mounted on axles 22 and 23 rotatably contained in spaced bearings 24 and 25, suitably secured to the frame 3. The rollers 20 and 21 are of a frusto-conical shape and are mounted with the larger diameter 26 at the belt outer edge 6.
To assure proper helt contact about the rollers 20 and 21, the conical dimensions thereof are proportional to the ratio of the inner and outer radii of the belt as measured from the polar axis of the curve.
The upper surface of each roller 20 and 21 is substantially tangent to the surface of the bed 15.
.,~, .
~.~
111)Q~36 The roller 20 constitutes the contacting drive means for the belt 2. The axle or shaft 23 thereof is coupled to an appropriate drive motor 27 associated with gear reduction means 28 so as to provide suit-able speed and torque forces for conditions prevailing.
A plurality of holdback lugs 30 are preferably constructed of a low friction, synthetic polymer material, such as Teflon* or Hyfax*
and are position about the belt outer edge 6 in spaced-apart relation, Figure 1. The lugs 30 are notched at 31, Figure 4, so as to receive the belt 2 therein over a significant transverse belt portion. Mounting washers or plates 32, preferably of the same or a similar low-friction material as the lugs 30, are posit;oned directly beneath the lugs 30 and slidably rest on the bed 15. In this example, bolts 32 extend vertically through the lugs 30, the belt 2 and plates 32 in order to secure these items together, the bolts 32 receiving nuts 34 thereonto. The heads 35 of the bolts 32 are suitably recessed into the plates 32 so that the noted items are secured together without exposing the bed 15 to bolt contact.
The number and spacing of the lugs 30 may vary; however, by way of example, in a belt turn having a 90 degree arc approximately 10 feet in length, 50 lugs longitudinally positioned about a standard 3/16 belt appears to be functional. Typical lugs used, for example, may be approximately 3/4 inch high, 1 1/2 inches in length and 1 inch in width.
The lugs 30 are preferably constructed to allow the belt edge 6 to abut an interior vertical surface 36 and horizontal surface 37 of the notched portion at 31. Thus, the lugs are secured to and move with the belt and are restricted against rotation about the axis of the bolt.
A rail, or bearing wear strip 40, is attached to the outer sideguard 9, Figure 4, so as to continuously define the path of the belt 2 at points somewhat interior to the belt outer edge 6. The wear strip 40 is slightly vertically d;splaced from the belt top surface 41 and is * Trademarks 11~86 attached to the outer sideguard 9 by means of spaced and recessed screws 42 threadedly engaging a series of spaced mounting blocks 43 secured to the exterior surface 44 of the sideguard 9. The use of such unting blocks 43 avoids protrusion of the s-crews 42 through the sideguard and into the conveyance path. The bearing wear strip 4Q presents a continuous bearing surface 45 extending below the upper surface 46 of the lugs 30 and~ thus, overlapping and facing a bearing surface 47 on the lugs 30.
The surface 47 is preferably curved to the same curvature as the wear strip 40, resulting in a maximum degree of bearing contiguity therebetween.
During curved belt movement, imparted by the drive roller 21, the belt will tend to shift toward the polar axis of the curve. This will result in the holdback lugs 30 slidably bearing against the wear strip 4Q, as the bed 15 provides vertical support to the lugs. The basal surface 48 of the wear strip 40 is vertically displaced at such a distance from the top surface 41 of the belt 2, so as to avoid rubbing therebetween during normal functional operation, but prevent undue vertical movement of the outer belt edge 6. The lugs 30 and belt edge 6 are, thus, restrained against movement toward the curve polar axis, causing the lugs to bear against the wear strip so as to introduce forces placing the belt in transverse tension and tending to prevent creeping, buckling or warping of the belt as it moves through its arcuate path.
An alternate embodiment of the invention is shown in Figure 5 wherein holdback lugs 49, preferably of similar material to the lugs 30, contain horizontally disposed longitudinal grooves 50 extending through the lug bearing surfaces 65 and receiving the belt outer edge 52 therein.
The height of the grooves 50 are substantially equal to the thickness of the belt 53, which has a transverse portion snugly contained and secured therein by respective recessed bolts 54 extending through the belt and lugs and cooperating with nuts 55. The lug basal or contact surface 56 rests and slides upon the contact surface 17 of the bed 15 in 110~086 the same manner as the plate 35 discussed above.
The embodiment of Figure 5 also illustrates a modified form of bearing wear strip arrangement. The intermediate frame member 60 supports a plurality of spaced tabs 61 to which is secured a support rail 62. A bearing wear strip 63 is preferably of a similar material as the strip 40 but is formed in a cross-sectional "C" configuration, whereby it is rapidly and conveniently installed, or replaced, upon the rail 62 by bending to receive the rail thereinto. The strip 63 thereby presents a bearing surface 64 which cooperates with the lug surface 65 in the manner described above in connection with the lug surface 47 and strip surface 45.
It is to be understood that whîle certain forms of this invention have been illustrated and described, it is not to be limited to the specific form or arrangement of parts herein described and shown, except insofar as such limitations are included in the following claims.
According to the invention there is provided in a curved conveyor belt system including: a conveyor belt frame; a driven endless conveyor belt supported on said frame, forming an arcuate sector, and having a radially outer edge; and guide means maintaining the lateral positlon of said belt during functional conveyance; the improvement comprls m g:
(a~ an elongated bearing strip secured to said frame, extending adjacent the outer edge of at least one fligh~ of said belt, and having a bearing surface spaced inwardly of said belt outer edge, said bearing surface heing oriented generally perpendicularly to said belt;
llOQQ~36 Cb~ a plurality of lugs attached to said belt in spaced apart relation along said belt outer edge;
~c) each lug having a lug bearing surface extending on only one side of said belt and in sliding engagement with said ~earing surface of said bearing strip;
(d) each lug including means forming a contact surface, said contact surface being oriented substantially horizontally; and ~e) a frame member including a horizontal contact surface extending adjacent said belt outer edge, said lug contact surface being adapted for sliding contact with said frame member contact surface and orienting said lugs to maintain said sliding engagement between said lug bearing surface and said bearing strip bearing surface.
Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings, wherein are set forth, 6y way of illustration and example, certain embodiments and features of this invention.
- Briéf Description-of the Drawings Figure 1 is a top plan view of an arcuate conveyor belt system embodying this invention wnth a portion broken away from the radially outer edge of the system support framework, showing the holdback lugs.
Figure 2 is a front elevational view of the conveyor belt system as shown in Figure 1.
Figure 3 is a top fragmentary view, on an enlarged scale, showing the holdback lug/bearing rail in sliding cooperation.
Figure 4 is a vertical sectional vîew, on enlarged scale, taken along line 4-4 in Figure 1, showing details of the holdback lug~
bearing construction.
Figure S is a vertical sectional view, similar to that of Figure 4, showing a modified form of the present invention.
llOQQ86 Description of the Preferred Embodiment Referring to the drawing~ in more detail, Figure 1 shows a conveyor belt system 1 used for guiding an arcuate conveyor belt 2 through a turn. The system, as illustrated, encompasses a sa degree turn but the arc of the turn may be varied, depending upon the turn desired.
The basic system 1 comprises a curved frame 3 having vertically extending, arcuate outer and inner supporting walls 4 and 5 respectively extending along the radially outer and inner edges 6 and 7 of the belt curved path. The frame 3 is also provided with a vertically directed, arcuate inner sideguard 8, which broadly defines the radially inner edge 7 of the belt 2 and a similar verti`cal, arcuate outer sideguard 9 concentric to the inner sideguard ~, and defining the radially outer edge 6 of the belt 2 at a posit;on interior to the periphery thereof. The sideguards 8 and 9, in this example, project above the carrying surface of the belt 2, throughout the 90 degree arc, primarily to prevent objects from falling off the edges of the belt as they are transported throughout the turn, however, they may be varied greatly in relative height without department from the scope of this invention. The outer sideguard 9, because of its relative interior position to the belt outer edge 6, is vertically displaced from the belt 2 and is attached by appropriate spaced gussets 10 to an intermediate frame member 11. As shown in Figure 4, the intermediate frame member 11 is suitably secured to the front outer supporting wall 4, as by bolts 12, and extends vertically above and horizontally over the belt inner edge 6, forming an enclosed channel or alleyway 13 which contains belt retaining structure 14 detailed below.
The intermediate frame member 11 also functions to shield the belt retaining structure from the intrusion of debris which may interfere with proper operation of the conveyor belt system.
The frame walls 4 and 5 support an arcuate, horizontally disposed frame member or bed 15 which extends throughout the length of llOQQ86 the turn and, in the embodiment illustrated, is adapted to support the upper flight or functional conveyance path of the belt 2 throughout the turn. The bed 15 laterally extends beyond the peripheral edges of the belt 2 and preferably includes a smooth contact surface 17 so as to keep resultant frictional forces between sliding parts at a minimum. Under-neath the bed 15 is a series of lateral return flight rollers 16, so positioned and mounted as to provide support for the belt 2 when in its return flight path.
The belt 2 is made of any suitable pliable, non-stretchable material using conventional manufacturing techniques. The belt may be cut from a single piece of belt mater;al with the proper arcuate shape so that it may be looped and fastened to form a single and endless curved belt. Such a bal~ when in an unfolded condition will preferably form the frustum of a hollow cone. The belt may also comprise a number of short, arcuate segments connected together with conventional fasteners to form the arcuate belt desired. The choice of material and construction technique for a belt to ke used in a given situation depends on various factors including: the type of objects to be conveyed, the effect of the belt surface on the objects conveyed, and belt speed.
The belt 2 is mounted on spaced and angularly aligned rollers or pulleys 20 and 21 mounted at the termini of the turn. The rollers 20 and 21 are rotatably mounted on axles 22 and 23 rotatably contained in spaced bearings 24 and 25, suitably secured to the frame 3. The rollers 20 and 21 are of a frusto-conical shape and are mounted with the larger diameter 26 at the belt outer edge 6.
To assure proper helt contact about the rollers 20 and 21, the conical dimensions thereof are proportional to the ratio of the inner and outer radii of the belt as measured from the polar axis of the curve.
The upper surface of each roller 20 and 21 is substantially tangent to the surface of the bed 15.
.,~, .
~.~
111)Q~36 The roller 20 constitutes the contacting drive means for the belt 2. The axle or shaft 23 thereof is coupled to an appropriate drive motor 27 associated with gear reduction means 28 so as to provide suit-able speed and torque forces for conditions prevailing.
A plurality of holdback lugs 30 are preferably constructed of a low friction, synthetic polymer material, such as Teflon* or Hyfax*
and are position about the belt outer edge 6 in spaced-apart relation, Figure 1. The lugs 30 are notched at 31, Figure 4, so as to receive the belt 2 therein over a significant transverse belt portion. Mounting washers or plates 32, preferably of the same or a similar low-friction material as the lugs 30, are posit;oned directly beneath the lugs 30 and slidably rest on the bed 15. In this example, bolts 32 extend vertically through the lugs 30, the belt 2 and plates 32 in order to secure these items together, the bolts 32 receiving nuts 34 thereonto. The heads 35 of the bolts 32 are suitably recessed into the plates 32 so that the noted items are secured together without exposing the bed 15 to bolt contact.
The number and spacing of the lugs 30 may vary; however, by way of example, in a belt turn having a 90 degree arc approximately 10 feet in length, 50 lugs longitudinally positioned about a standard 3/16 belt appears to be functional. Typical lugs used, for example, may be approximately 3/4 inch high, 1 1/2 inches in length and 1 inch in width.
The lugs 30 are preferably constructed to allow the belt edge 6 to abut an interior vertical surface 36 and horizontal surface 37 of the notched portion at 31. Thus, the lugs are secured to and move with the belt and are restricted against rotation about the axis of the bolt.
A rail, or bearing wear strip 40, is attached to the outer sideguard 9, Figure 4, so as to continuously define the path of the belt 2 at points somewhat interior to the belt outer edge 6. The wear strip 40 is slightly vertically d;splaced from the belt top surface 41 and is * Trademarks 11~86 attached to the outer sideguard 9 by means of spaced and recessed screws 42 threadedly engaging a series of spaced mounting blocks 43 secured to the exterior surface 44 of the sideguard 9. The use of such unting blocks 43 avoids protrusion of the s-crews 42 through the sideguard and into the conveyance path. The bearing wear strip 4Q presents a continuous bearing surface 45 extending below the upper surface 46 of the lugs 30 and~ thus, overlapping and facing a bearing surface 47 on the lugs 30.
The surface 47 is preferably curved to the same curvature as the wear strip 40, resulting in a maximum degree of bearing contiguity therebetween.
During curved belt movement, imparted by the drive roller 21, the belt will tend to shift toward the polar axis of the curve. This will result in the holdback lugs 30 slidably bearing against the wear strip 4Q, as the bed 15 provides vertical support to the lugs. The basal surface 48 of the wear strip 40 is vertically displaced at such a distance from the top surface 41 of the belt 2, so as to avoid rubbing therebetween during normal functional operation, but prevent undue vertical movement of the outer belt edge 6. The lugs 30 and belt edge 6 are, thus, restrained against movement toward the curve polar axis, causing the lugs to bear against the wear strip so as to introduce forces placing the belt in transverse tension and tending to prevent creeping, buckling or warping of the belt as it moves through its arcuate path.
An alternate embodiment of the invention is shown in Figure 5 wherein holdback lugs 49, preferably of similar material to the lugs 30, contain horizontally disposed longitudinal grooves 50 extending through the lug bearing surfaces 65 and receiving the belt outer edge 52 therein.
The height of the grooves 50 are substantially equal to the thickness of the belt 53, which has a transverse portion snugly contained and secured therein by respective recessed bolts 54 extending through the belt and lugs and cooperating with nuts 55. The lug basal or contact surface 56 rests and slides upon the contact surface 17 of the bed 15 in 110~086 the same manner as the plate 35 discussed above.
The embodiment of Figure 5 also illustrates a modified form of bearing wear strip arrangement. The intermediate frame member 60 supports a plurality of spaced tabs 61 to which is secured a support rail 62. A bearing wear strip 63 is preferably of a similar material as the strip 40 but is formed in a cross-sectional "C" configuration, whereby it is rapidly and conveniently installed, or replaced, upon the rail 62 by bending to receive the rail thereinto. The strip 63 thereby presents a bearing surface 64 which cooperates with the lug surface 65 in the manner described above in connection with the lug surface 47 and strip surface 45.
It is to be understood that whîle certain forms of this invention have been illustrated and described, it is not to be limited to the specific form or arrangement of parts herein described and shown, except insofar as such limitations are included in the following claims.
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a curved conveyor belt system including:
a conveyor belt frame; a driven endless conveyor belt supported on said frame, forming an arcuate sector, and having a radially outer edge; and guide means maintaining the lateral position of said belt during functional conveyance; the improvement comprising:
(a) an elongated bearing strip secured to said frame, extending adjacent the outer edge of at least one flight of said belt, and having a bearing surface spaced inwardly of said belt outer edge, said bearing surface being oriented generally perpendicularly to said belt;
(b) a plurality of lugs attached to said belt in spaced apart relation along said belt outer edge;
(c) each lug having a lug bearing surface extending on only one side of said belt and in sliding engagement with said bearing surface of said bearing strip;
(d) each lug including means forming a contact surface, said contact surface being oriented substantially horizontally; and (e) a frame member including a horizontal contact surface extending adjacent said belt outer edge, said lug contact surface being adapted for sliding contact with said frame member contact surface and orienting said lugs to maintain said sliding engagement between said lug bearing surface and said bearing strip bearing surface.
a conveyor belt frame; a driven endless conveyor belt supported on said frame, forming an arcuate sector, and having a radially outer edge; and guide means maintaining the lateral position of said belt during functional conveyance; the improvement comprising:
(a) an elongated bearing strip secured to said frame, extending adjacent the outer edge of at least one flight of said belt, and having a bearing surface spaced inwardly of said belt outer edge, said bearing surface being oriented generally perpendicularly to said belt;
(b) a plurality of lugs attached to said belt in spaced apart relation along said belt outer edge;
(c) each lug having a lug bearing surface extending on only one side of said belt and in sliding engagement with said bearing surface of said bearing strip;
(d) each lug including means forming a contact surface, said contact surface being oriented substantially horizontally; and (e) a frame member including a horizontal contact surface extending adjacent said belt outer edge, said lug contact surface being adapted for sliding contact with said frame member contact surface and orienting said lugs to maintain said sliding engagement between said lug bearing surface and said bearing strip bearing surface.
2. A curved conveyor belt system as set forth in Claim 1 wherein:
(a) said frame member is a bed supporting an upper flight of said conveyor belt; and (b) said bed extends from beneath said belt outwardly beyond said belt outer edge and beneath said lugs.
(a) said frame member is a bed supporting an upper flight of said conveyor belt; and (b) said bed extends from beneath said belt outwardly beyond said belt outer edge and beneath said lugs.
3. A curved conveyor belt system as set forth in Claim 1 wherein:
(a) each of said lugs includes a separable plate forming said lug contact surface.
(a) each of said lugs includes a separable plate forming said lug contact surface.
4. A curved conveyor system as set forth in Claim 1 wherein:
(a) each of said lugs includes a groove receiving said belt outer edge therein; and (b) said groove includes an end abutment surface engaged by said belt outer edge to thereby secure each of said lugs in proper orientation for said lug bearing surface to contact said bearing strip bearing surface.
(a) each of said lugs includes a groove receiving said belt outer edge therein; and (b) said groove includes an end abutment surface engaged by said belt outer edge to thereby secure each of said lugs in proper orientation for said lug bearing surface to contact said bearing strip bearing surface.
5. A curved conveyor belt system as set forth in Claim 1 wherein:
(a) said bearing strip is mounted on said conveyor belt frame by an intermediate frame member; and (b) said intermediate frame member forms an enclosed alleyway containing said bearing strip and said lugs during at least a part of said functional conveyance.
(a) said bearing strip is mounted on said conveyor belt frame by an intermediate frame member; and (b) said intermediate frame member forms an enclosed alleyway containing said bearing strip and said lugs during at least a part of said functional conveyance.
6. A curved conveyor system as set forth in Claim 1, wherein (a) said bearing surface of each lug extends substantially normally to said lug contact surface.
7. A conveyor system as set forth in Claim 1 wherein: (a) said bearing surface of each lug is curved to conform to said curved bearing surface of said bearing strip.
8. A curved conveyor system as set forth in Claim 1 wherein:
(a) said bearing strip is formed into a "C" shape cross section and is wrapped about a portion of an intermediate frame member.
(a) said bearing strip is formed into a "C" shape cross section and is wrapped about a portion of an intermediate frame member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US89628378A | 1978-04-14 | 1978-04-14 | |
| US896,283 | 1978-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1100086A true CA1100086A (en) | 1981-04-28 |
Family
ID=25405946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA320,883A Expired CA1100086A (en) | 1978-04-14 | 1979-02-06 | Power curve construction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1100086A (en) |
-
1979
- 1979-02-06 CA CA320,883A patent/CA1100086A/en not_active Expired
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