GB2152000A - Cylindrical conveyor belt - Google Patents
Cylindrical conveyor belt Download PDFInfo
- Publication number
- GB2152000A GB2152000A GB08431907A GB8431907A GB2152000A GB 2152000 A GB2152000 A GB 2152000A GB 08431907 A GB08431907 A GB 08431907A GB 8431907 A GB8431907 A GB 8431907A GB 2152000 A GB2152000 A GB 2152000A
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- United Kingdom
- Prior art keywords
- portions
- conveyor belt
- cylindrical
- transverse direction
- slant
- 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.)
- Granted
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 22
- 238000005299 abrasion Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 description 43
- 239000010410 layer Substances 0.000 description 21
- 229920001971 elastomer Polymers 0.000 description 14
- 239000005060 rubber Substances 0.000 description 14
- 239000000470 constituent Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
- B65G15/40—Belts or like endless load-carriers made of rubber or plastics troughed or tubular; formed with joints facilitating troughing
-
- 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
- B65G29/00—Rotary conveyors, e.g. rotating discs, arms, star-wheels or cones
-
- 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
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/08—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration the load-carrying surface being formed by a concave or tubular belt, e.g. a belt forming a trough
-
- 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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
-
- 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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/06—Articles and bulk
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
- Belt Conveyors (AREA)
Abstract
A cylindrical conveyor belt comprises in transverse section a central conveyor portion (1) and a pair of lug portions (2) formed integrally at both sides of the conveyor portion, the paired lug portions being joined in contact with each other to render the conveyor portion cylindrical, the conveyor portion comprising in transverse section a centrally position bottom portion which constitutes a bottom of the cylindrical shape, a pair of side portions positioned on both sides of the bottom portion and constituting side walls of the cylindrical shape, a pair of slant portions positioned outside the paired side portions and constituting slant upper walls of the cylindrical shape, and neck portions (3) positioned between the paired slant portions and the lug portions and constituting an opening in the cylindrical shape, the rigidity of the neck portions in the transverse direction being lower than that of the bottom, side, slant and lug portions in the transverse direction. The selection of suitable reinforcing layers (4, 5, 6) to obtain required variations in rigidity is described. <IMAGE>
Description
SPECIFICATION
Cylindrical conveyor belt
The present invention relates to cylindrical conveyor belts.
A cylindrical conveyor belt comprises a central conveyor portion and a pair of lug portions formed integrally at both side ends of the conveyor portion, with the fore and rear ends thereof being joined to form an endless belt. During use of such cylindrical conveyor belt, the belt is guided and transferred by guide rollers or the like, whereby the conveyor portion is held cylindrical and the paired lug portions formed at both side ends of the conveyor portion are joined and contacted with each other. Objects are conveyed by the cylindrical conveyor portion.
In conventional cylindrical conveyor belts, the paired lug portions are made larger in wall thickness than the conveyor portion, or inclined at an angle relative to the conveyor portion, thus requiring a special mould for vulcanisation-moulding of the lug portions. Moreover, because the conveyor portion and the lug portion are different in thickness and shape, the cylindrical conveyor belt after manufacture becomes bulky and difficult to pack and transport. Further, when the conveyor belt is bent around guide rollers during operation, the thick-walled or inclined lug portion may undergo a large distortion, thus causing an abnormal deformation of the lug portions.
Additionally, during a curved travel of the conveyor belt, both side portions comes close to each other. For example, as shown in Figure 10 of the accompanying drawings, the sectional area is reduced to a large extent due to a rise of the slant portions 101 and to bend of a bottom portion 102.
A cylindrical conveyor belt of the present invention is endless and comprises in transverse section a central conveyor portion and a pair of lug portions formed integrally at both sides of the conveyor portion, the paired lug portions being joined in contact with each other to render the conveyor portion cylindrical, the conveyor portion comprising in transverse section a most centrally positioned bottom portion which constitutes a bottom of the cylindrical shape, a pair of side portions positioned on both sides of the bottom portion and constituting side walls of the cylindrical shape, a pair of slant portions positioned outside the paired side portions and constituting slant upper walls of the cylindrical shape, and neck portions positioned between the paired slant portions and the lug portions and constituting an opening in the cylindrical shape, the rigidity of the neck portions in the transverse direction being lower than that of the bottom, side, slant and lug portions in the transverse direction.
The accompanying drawings show embodiments of the invention. In the drawings:
Figure 1 is a sectional view of principal portions of a cylindrical conveyor belt according to a first embodiment of the present invention;
Figure 2 is a sectional view of principal portions of the cylindrical conveyor belt of Figure 1 as loaded to a cylindrical conveyor device;
Figure 3 is a sectional view of principal portions of a cylindrical conveyor belt according to a second embodiment of the present invention;
Figure 4 is a sectional view of principal portions of a cylindrical conveyor belt according to a third embodiment of the present invention;
Figure 5 is a sectional view of the cylindrical conveyor belt of the third embodiment as loaded to a cylindrical conveyor device;;
Figure 6 is a sectional view of principal portions showing a modification of the cylindrical conveyor belt of the third embodiment;
Figure 7 is a sectional view of a cylindrical conveyor belt according to a fourth embodiment of the present invention;
Figure 8 is a sectional view of principal portions of the cylindrical conveyor belt of the fourth embodiment as loaded to a cylindrical conveyor device;
Figure 9 is a sectional view of a cylindrical conveyor belt according to a fifth embodiment; and
Figure 10 is a schematic sectional view of a conventional conveyor belt during curved travel.
The cylindrical conveyor belt of the present invention is endless and is in the shape of a relatively thick-walled sheet having an almost constant thickness in trabsverse section. It comprises in transverse section a most centrally positioned bottom portion which constitutes a bottom when the belt is bent cylindrically, a pair of side portions which constitute side walls when the belt is bent cylindrically, a pair of slant portions positioned outside the paired side portions and constituting upper oblique walls of the cylindrical shape, neck portions positioned outside the paired slant portions and constituting an opening in the cylindrical shape, and lug portions formed in the outermost positions.
The cylindrical conveyor belt has substantially the same wall thickness throughout its transverse section. In appearance, therefore, the bottom, side, slant, neck and lug portions are not clearly divided except in special cases.
In the cylindrical conveyor belt of the present invention, the above constituent portions of the belt are changed in rigidity in the transverse direction, whereby a cylindrical shape close to a true round is maintained in a cylindrically bent condition of the belt.
The lug portions are joined and contacted with each other in the cylindrically bent condition of the belt, thereby closing the opening end of the cylindrical shape. More particularly, when the belt is in use, the lug portions are pressed firmly on their respective outer surfaces by means of rotating rollers or the like and are joined thereby. End faces of the lug portions are pressed by an end roller.
As to the width of the lug portions, it is determined by the size of the conveyor belt, the type of object to be conveyed, etc. In general, it is suitable that the width of each lug portion is in the range of about 2 to 10 units, assuming that the width in the transverse direction of the conveyor portion which forms the cylindrical shape is 100 units.
The inner surface of the lug portions contact each other, and pressure rollers come into contact with the outer surfaces of the lug portions. Therefore it is preferable that the inner and outer surfaces of the lug portions be formed of a material higher in abrasion resistance than the other constituent portions of the conveyor belt. It is also preferable that the lug portions have a high rigidity in the transverse direction, in order to minimize warp or the like in the transverse direction.
The neck portions, which are positioned inside the lug portions, define an opening in the conveyor portion when bent cylindrically. The neck portions undergo the largest bending force in the transverse direction so that the inner surfaces are convexed, unlike the other constituent portions of the conveyor belt. Also as to the width of the neck portions, an optimum value can be obtained according to the purpose of use of the conveyor belt, etc. In general, it is suitable that the width (length in the transverse direction) of each neck portion be in the range of about 0.5 to 10 units, assuming that the length in the transverse direction of the conveyor portion which forms the cylindrical shape is 100 units. As to the rigidity of the neck portions, it will be explained later as the whole of the conveyor portion.
The slant portions, positioned between the neck and side portions, constitute upper slant arcuate portions when the conveyor portion is bent cylindrically. It is suitable that the width of each slant portion be in the range of about 10 to 15 units, assuming that the length in the transverse direction of the conveyor portion is 100 units.
The side portions constitute side walls in a cylindrically bent state of the conveyor belt. It is suitable that the length in the transverse direction of each side portion be in the range of about 20 to 30 units, assuming that the entirety of the conveyor belt portion is 100 units.
The bottom portion constitutes a bottom of the belt in a cylindrically bent state, and it is suitable that the length in the transverse direction of the bottom portion be in the range of about 20 to 30 units, assuming that the conveyor belt portion is 100 units.
In the present invention, the rigidity in the transverse direction of the neck portions described above is smaller than any other constituent portions, including lug portions, of the conveyor belt.
That is, the neck portions are formed soft.
As one index indicating the rigidity of conveyor belt, there has been known a trough performance testing method based on the Japan Rubber Association Standard. Here the trough performance was measured as follows according to the Standard. A rectangular test piece, 150 mm in belt width in the longitudinal direction and 900 mm in belt width in the transverse direction (L mm), was suspended at the four corners thereof by hanger means, and an average value (F mm) of deflection at the centre of the test piece was measured. The trough performance T of this test piece is determined from T = F /
L. It takes a large value when the rigidity is small, that is, when the belt is soft. The rigidity in the transverse direction of the conveyor belt of the present invention is represented by this trough performance T.The rigidity (trough performance) of each constituent portion will be explained below on the basis of the trough performance of the bottom portion which corresponds to the most central part of the cylindrical conveyor belt.
Assuming that the trough performance of the bottom portion in the transverse direction is 100, the trough performance of the neck portion is preferably in the range of 150 to 400. The thickness of the neck portions may be made thin as compared with the other constituent portions of the conveyor belt to enhance the trough performance. In this case, it is preferable that a longitudinally extending groove be formed in at least one face of each neck portion.
In terms of trough performance, the rigidity in the transverse direction of the slant portions is preferably in the range of 50 to 110, assuming that the trough performance of the bottom portion is 100.
The trough performance of the side portions is preferably in the range of 120 to 200.
In the cylindrical conveyor belt of the present invention, it is the neck portions that contribute most greatly to the attainment of the conveyor portion close to a true round. Because the thickness in the transverse direction of the conveyor belt is restricted within a certain range and the sectional shape is like a flat plate, a large bending distortion inevitably acts on the neck portions. The reason why the neck portions are made soft is that it is intended to facilitate such bending deformation.
The conveyor belt may be constructed so that the rigidity of only the neck portions is low and the other portions have almost the same rigidity higher than the rigidity of the neck pOrtions. In such a conveyor belt of a plate-like section in which only the neck portions are made soft, the roundness in a cylindrically transformed state of the belt is relatively low, but this construction is applicable to a conveyor belt with less curved travel such as a cylindrical conveyor belt for straight travel.
Further, in order that the cylindrical conveyor belt may have a high roundness, it is necessary that the side portions be low in rigidity next to the neck portions. And for drawing the cylindrical shape close to a true round, the rigidity of the slant portions should be made higher than that of the bottom portion. In conventional conveyor belts, as shown in Figure 10, side portions tend to rise during a curved travel of the belt. By making the slant and bottom portions harder than the side portions, the slant and side portions are maintained so as to extend in the horizontal direction, thereby allowing the side portions to bend.
The rigidity in the transverse direction of the cylindrical conveyor belt can be arranged by increasing or decreasing the number of reinforcing layers embedded in the transverse direction or by a combination use of both a reinforcing layer having a high rigidity and a reinforcing layer having a low rigidity. In order to maintain the integrity of the whole of the cylindrical conveyor belt in the transverse direction, it is preferable that at least one centrally disposed reinforcing layer be in communication with the neck portions in the transverse direction,
As to the rigidity in the longitudinal direction of the entire cylindrical conveyor belt, it is preferably as uniform as possible. It is preferably that the lug, neck, slant, side and bottom portions be equal in rigidity in the longitudinal direction, but they may have different longitudinal rigidities.For example, the rigidity in the longitudinal direction of each constituent portion of the belt may be made equal to the rigidity thereof in the transverse direction.
As to material such as reinforcing layers and rubber which constitute the cylindrical conveyor belt of the present invention, those used in conventional conveyor belts and cylindrical conveyor belts may be used as they are.
As rollers for transforming the conveyor belt of the invention into a cylindrical form, it is preferably to use, as shown in Figure 2, five cylindrical shape guide rollers which are brought into abutment with the outer surfaces of the slant, side and bottom portions, a pair of gripping rollers for gripping the outer surfaces of the lug portion, and an end roller for restricting the end faces of the lug portions.
More preferably, a pair of additional guide rollers are provided between the bottom portion and the side portion.
The cylindrical conveyor belt of the present invention is in the form of a sheet which is almost equal in wall thickness throughout its transverse section, and thus there is no partially thicker portion in the transverse direction, Consequently, a mould of a simpler structure can be used in the manufacturing process, for example, in the vulcanising step, and the packing and transport of the cylindrical conveyor belt become extremely easy.
Moreover, when the belt is used in a cylindrically bent condition, no abnormal distortion acts on the lug and neck portions, so the belt becomes highly durable. Further, since the constituent portions of the cylindrical conveyor belt are made different in transverse rigidity to a predetermined degree, the cylindrical shape defined by the belt approaches to a true round, thus facilitating the conveyance of objects by the cylindrical conveyor belt. Even in a curved travel path of the cylindrical conveyor belt, a relatively circular section is maintained.
Reference will now be made to the drawings.
Example 1
Figure 1 is a sectional view of principal portions of a cylindrical conveyor belt according to a first embodiment of the present invention, This cylindrical conveyor belt has a total width of 136 cm, a thickness of 20 mm and a length of about 50 m. Of the total width of 136 cm, about 110 cm is the width of a central portion 1, about 5 cm is the width of each of neck portions 3 positioned on both sides of the central portion 1, and about 6 cm is the width of each lug portions 2 positioned at both ends of the belt. The conveyor portion which forms a cylindrical shape is composed of the central portion 1 and the neck portions 3 which are positioned on both sides of the central portion. The thickness of the conveyor belt is about 20 mm at any part of the belt.In this cylindrical conveyor belt are embedded two central reinforcing layers 4 formed of canvas in communication with the central portion 1, neck portions 3 and lug portions 2.
And in the central portion 1 are embedded side reinforcing layers 5 two each on both sides of the central reinforcing layers 4, the side reinforcing layers 5 being also formed of canvas. Further, also in each lug portion 2 are formed side reinforcing layers 6 two each on both sides of the central reinforcing layers 4, the side reinforcing layers 6 being also formed of canvas. In both side reinforcing layers 5 and 6, the layers close to the belt faces are shorter in width than those close to the central part. Therefore, in each neck portion 3, the portion formed of only rubber not containing the side reinforcing layers 5 and 6 becomes wider towards the belt faces.
The canvas which constitutes the reinforcing layers 4, 5 and 6 of a half mat weave obtained by using polyester fibres as warp and nylon as weft. The strength in the longitudinal direction (warp direction) of this canvas is not lower than 430 kg /3 cm and its strength in the transverse direction (weft direction) is not less than 295 kg /3 cm. As the rubber there is used a blended rubber comprising a mixture of natural rubber and styrene-butadiene rubber. The rubber hardness is about Hs 65.
This cylindrical conveyor belt was fabricated using the same belt press as that used in the manufacture of a conventional plate-like conveyor belt.
More particularly, unvulcanised surface cover rubber, the central and side reinforcing layers 4, 5 and 6 formed of canvas were laminated on the surface of a lower mould of the belt press in a known manner, followed by application of heat and pressure by the belt pressure to vulcanise and mould a certain length of belt portion. Belt portions thus moulded were successively moved to obtain the cylindrical conveyor belt of this embodiment having a length of about 50 m. In this belt, the trough performance of the central and lug portions 1 and 2 was 0.141 and that of the neck portions 3 was about 0.280.
This cylindrical conveyor belt was loaded to a conventional cylindrical conveyor device and thereby transformed into a cylindrical shape as shown in Figure 2. In the cylindrical conveyor belt of this first embodiment, the conveyor portion composed of the central portion 1 and the neck portion 3 is transformed into a generally circular shape by six cylindrical-shape guide rollers 7, and the lug portions 2 are joined and contacted with each other by a pair of gripping rollers 8 and end face positions thereof are restricted by an end face restricting roller 9.
In the cylindrical conveyor belt of this first embodiment, as shown in Figure 2, deforming stresses of the central portion 1 and lug portions 2 are absorbed by the neck portions 3 where the side reinforcing layers are not present, thereby elimi nating the inconvenience of floating of the lug portions 3. Further, a compressive force tends to act on the neck portions 3, and it was confirmed unnecessary to consider damage, etc. induced by tensile stress at the neck portions 3.
Example 2
Figure 3 is a sectional view of principal portions of a cylindrical conveyor belt according to a second embodiment of the present invention.
In the cylindrical conveyor belt of this embodiment, as compared with that of the first embodiment, lug portions 11 have a modified structure.
More specifically, in the lug portions 11 are not formed side reinforcing layers, and instead there are formed surface layers 10 containing an abrasion resistant member which is a rubber composition comprising a 6:4 blend of butadiene rubber and natural rubber The construction of the central portion 1 and neck portion 3 is just the same as in the cylindrical conveyor belt of the first embodiment. The trough performance of the central portion 1 and that of the neck portions 3 in this embodiment are the same as in the first embodiment, namely 0.141 and 0.280 respectively, and the trough performances of the lug portions 11 is 0.210.
In the cylindrical conveyor belt of this embodiment, since the surfaces of the lug portions 11 are formed by the surface layers 10 which contains the abrasion-resistant member, the wear at the lug portions 11 is diminished and durability of the same portions is improved.
Example 3
Figure 4 is a sectional view of principal portions of a cylindrical conveyor belt according to a third embodiment of the present invention. In this cylindrical conveyor belt, as compared with that of the first embodiment, neck portions 12 have a modified structure. More specifically, a longitudinally extending groove 12 of a semi-circular section is formed in the outer surface of each neck portion
12. The groove 13 facilitates bending of the neck portions 12 when the belt is transformed into a cylindrical shape as shown in Figure 5. In both outer and inner surfaces of each neck portion 14 there
may be formed longitudinally extending grooves
15 and 16 as shown in Figure 6.
Example 4
Figure 7 is a sectional view of a cylindrical conveyor belt according to a fourth embodiment of the
present invention. This belt has a length of 30 m, a total width of 110 cm, and a uniform thickness of
14 mm.
The cylindrical conveyor belt of this embodiment comprises, in its transverse structure, a bottom
portion 17, side portions 18 which constitute both sides of the bottom portion, slant portions 19, neck
portions 20 and lug portions 21, which are ar
ranged successively outwards from the central
part. The length in the transverse direction of the
bottom portion 17 is 275 mm, that of each of the two side portions 18 is 165 mm, that of each of the two slant portions 19 is 127 mm, that of each of the two neck portions 20 is 30 mm and that of each of the two lug portions 21 is 70 mm.
As reinforcing layers there are used two kinds of cloths, one being a tension-resistant cloth indicated by thick solid lines and the other being a high elongation cloth indicated by dotted lines. The tension-resistant cloth comprises polyester warp and
nylon weft and exhibits 1.5 to 2% elongation under 40 kg load. The high elongation cloth comprises
high elongation nylon warp and ordinary nylon weft and exhibits about 20% elongation under a
load of about 10 kg/cm.
In the sectional view of Figure 7, the upper surface serves as an object conveying surface, and the
lower surface becomes an outside surface when the conveyor belt is transformed into a cylindrical shape. In the central portion 17 of the conveyor
belt are embedded a tension-resistant cloth 22 hav
ing a width of 220 mm centrally in the thickness di
rection, a tension-resistant cloth 23 overlying the
cloth 22 and having a width of 330 mm, and a high
elongation cloth 24 underlying the cloth 22 and
having a width of 900 mm.In each side portion 18
are embedded a high elongation cloth 25 portioned
centrally in the thickness direction adjacent the
tension-resistant cloth 22 in the central portion 17
and having a width of 220 mm, a high elongation
cloth 26 overlying the cloth 25 and having a width
of 110 mm, and the aforementioned high elonga
tion cloth 24 underlying the cloth 25. In each slant
portion 19 are embedded a tension-resistant cloth
27 having a width of 220 mm centrally in the thick
ness direction, a tension-resistant cloth 28 overly
ing the cloth 27 and having a width of 275 mm, a
tension-resistant cloth 29 overlying the cloth 28
and having a width of 150 mm, and the aforemen
tioned high elongation cloth 24 underlying the
cloth 27.In each neck portion 20 are embedded
only the tension-resistant cloth 27 positioned cen
trally and the tension-resistant cloth 28 overlying
the cloth 27. In each lug portion 21 are embedded
the aforementioned tension-resistant cloths 27 and
28 as well as a tension-resistant cloth 30 overlying
them and a tension-resistant cloth 31 underlying
them. In this conveyor belt, the thickness of the
upper surface-side cover rubber of the central and
side portions 17 and 18 is 6 mm and that of the
slant and lug portions 19 and 21 is 4 mm, while
the cover rubber thickness on the lower surface
side is 4 mm except the neck portions 20. The
cover rubber hardness is about Hs 56.
The trough performances of the bottom, side,
slant, neck and lug portions 17, 18, 19, 20 and 21
were 0.220, 0.270, 0.160, 0.282 and 0.143 respec
tively.
The cylindrical conveyor belt was also fabricated
in the same way as in the manufacture of the cy
lindrical conveyor belt of the first embodiment.
It is loaded to a conveyor device and thereby
transformed into a cylindrical shape, as shown in
Figure 8.
The conveyor portion is transformed into a gen
erally round shape by five cylindrical-shape guide
rollers 7, the lug portions 21 are joined and con tacted with each other by a pair of gripping rollers 8, and end face positions of the lug portions 21 are restricted by the end-face roller 9.
The cylindrical conveyor belt of this embodiment was transformed into a substantially round shape by the five cylindrical-shape guide rollers, and it could be maintained in shape relatively close to a true round even at curved travel portions of the conveyor device.
Example 5
Figure 9 is a sectional view of a cylindrical conveyor belt according to a fifth embodiment of the present invention. This belt has a length of 50 mm, a total width of 138 cm and a uniform thickness of about 15 mm.
The cylindrical conveyor belt of this embodiment comprises, in its transverse structure, a bottom portion 32, side portions 33 which constitute both sides of the bottom portion, slant portions 34, neck portions 25 and lug portions 36, which are arranged successively outwards from the central part. The length in the transverse direction of the bottom portion 32 is 350 mm, that of each of the two side portions 33 is 250 mm, that of each of the two slant portions 34 is 175 mm, that of each of the two neck portions 35 is 30 mm and that of each of the two lug portions 36 is 60 mm.
As reinforcing layers there are used two kinds of cloths, one being a tension-resistant cloth indicated by thick solid lines and the other being a high elongation cloth indicated by dotted lines. Both cloths are the same as those used in Example 4.
In the sectional view of Figure 9, the upper surface serves as an object conveying surface, and the lower surface becomes an outside surface when the conveyor belt is transformed into a cylindrical shape. In the central portion 32 of the conveyor belt are embedded, successively from above to below in the thickness direction, a tension-resistant cloth 37 having a width of 450 mm, a tension-resistant cloth 38 having a width of 350 mm, a tension-resistant cloth 39 having a width of 250 mm and a high elongation cloth 40 having a width of 120 mm.In each side portion 33 are embedded a high elongation cloth 41 having a width of 150 mm, a high elongation cloth 42 having a width of 250 mm and a high elongation cloth 43 having a width of 350 mm which are positioned sideways adjacent the tension-resistant cloths 37, 38 and 39 respectively in the central portion 32, as well as the aforementioned high elongation cloth 40 below those high elongation cloths. In each slant portion 34 are embedded a tension-resistant cloth 44 having a width of 225 mm, a tension-resistant cloth 45 having a width of 175 mm and a tension-resistant cloth 46 having a width of 220 mm which are positioned sideways adjacent the high elongation cloths 41, 42 and 43 respectively in the side portion 33, as wqll as the aforementioned high elongation cloth 24 below those tension-resistant cloths.In each neck portion 35 are embedded only the above tension-resistant cloths 45 and 46. In each lug portion 36 are embedded the aforementioned tensionresistant cloths 45 and 46 as well as a tension-resistant cloth 47 overlying them and a tension-resistant cloth 48 underlying them. In this conveyor belt, the thickness of the upper surface-side cover rubber is about 5 mm and that of the lower surface-side cover rubber is about 2 mm. The cover rubber hardnes is about Hs 63.
The trough performances of the bottom, side slant, neck and lug portions 32, 33, 34, 35 and 36 were 0.157, 0.195, 0.280 and 0.141 respectively.
This cylindrical conveyor belt was also fabricated in the same manner as in the manufacture of the cylindrical conveyor belt of the first embodiment.
It is loaded to a conveyor device 382 mm in diameter of a cylindrical shape like Figure 8.
The cylindrical conveyor belt of this embodiment was transformed into a nearly true round by five cylindrical-shape guide rollers, and it could be maintained in a shape relatively close to a true round even at curved travel portions of the conveyor device.
Claims (9)
1. A cylindrical conveyor belt which comprises in transverse section a central coneyor portion and a pair of lug portions formed integrally at both sides of the conveyor portion, the paired lug portions being joined in contact with each other to renber the conveyor portion cylindrical, wherein the conveyor portion comprises in transverse section a most centrally portioned bottom portion which constitutes a bottom of the cylindrical shape, a pair of side portions positioned on both sides of the bottom portion and constituting side walls of the cylindrical shape, a pair of slant portions positioned outside the said paired side portions and constituting upper walls of the cylindrical shape, and neck portions positioned between the paired slant portions and the lug portions and constituting an opening in the cylindrical shape, the rigidity of the neck portions in the transverse direction being lower than that of the bottom, side, slant and lug portions in the transverse direction.
2. A cylindrical conveyor belt according to claim 1, wherein the rigidities of said bottom portion, the side portions and the slant portions in the transverse direction are the same.
3. A cylindrical conveyor belt according to claim 1, wherein the trough performance of the neck portion in the transverse direction is in the range of 150 to 400, the trough performance of the slant portions in the transverse direction is in the range of 50 to 110 and the trough performance of the side portion in the transverse direction is in the range of 120 to 200 in the case where the trough performance of the bottom portion in the transverse direction is assumed to be 100.
4. A cylindrical conveyor belt according to claim 1, wherein the rigidity of the side portions in the transverse direction is less than that of the bot tom slant portions in the transverse direction.
5. A cylindrical conveyor belt according to claim 4, wherein the rigidity of the bottom portion in the transverse direction is less than that of the slant portions in the transverse direction.
6. A cylindrical conveyor belt according to any of the preceding claims, including at least one central reinforcing layer which extends into the lug portions in the transverse direction.
7. A cylindrical conveyor belt according to any of the preceding claims, wherein the upper and lower portions of each lug are formed of an abrasion-resistant material.
8. A cylindrical conveyor belt according to any of claims 1 to 6, wherein a longitudinally extending groove is formed in at least one face of each neck portion.
9. A cylindrical conveyor belt constructed and arranged substantially as hereinbefore described and shown in Figures 1 and 2, or 3, or 4 and 5, or 6, or 7 and 8, or 9 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58248580A JPS60144211A (en) | 1983-12-29 | 1983-12-29 | Cylindrical conveyor belt |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8431907D0 GB8431907D0 (en) | 1985-01-30 |
| GB2152000A true GB2152000A (en) | 1985-07-31 |
| GB2152000B GB2152000B (en) | 1987-01-14 |
Family
ID=17180237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08431907A Expired GB2152000B (en) | 1983-12-29 | 1984-12-18 | Cylindrical conveyor belt |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS60144211A (en) |
| KR (1) | KR950003263B1 (en) |
| AU (1) | AU564136B2 (en) |
| CA (1) | CA1228320A (en) |
| DE (1) | DE3447248C2 (en) |
| FR (1) | FR2557546B1 (en) |
| GB (1) | GB2152000B (en) |
| ZA (1) | ZA849760B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2195309A (en) * | 1986-09-30 | 1988-04-07 | Okazaki Haruo | A belt for a tubular belt conveyor |
| EP0336385A1 (en) * | 1988-04-07 | 1989-10-11 | Phoenix Aktiengesellschaft | Tubular conveyor belt |
| US5060787A (en) * | 1987-12-18 | 1991-10-29 | Lennart Tingskog | Belt conveyor and conveyor belt therefor |
| WO1992002439A1 (en) * | 1990-08-01 | 1992-02-20 | Continental Aktiengesellschaft | Conveyor belt for closed belt conveyors |
| EP0867383A1 (en) * | 1997-03-25 | 1998-09-30 | S.F.B.T. - Société Française de Bandes Transporteuses | Flexible transport belt and its use as a conveyor |
| RU2312051C1 (en) * | 2006-05-11 | 2007-12-10 | Государственное образовательное учреждение высшего профессионального образования Северо-Кавказский горно-металлургический институт (государственный технологический университет) (СКГМИ (ГТУ) | Belt conveyor |
| CN101500913B (en) * | 2006-06-13 | 2014-07-02 | Z-菲尔特私人有限公司 | Material Handling and Handling |
| CN104854003A (en) * | 2012-10-10 | 2015-08-19 | Z-菲尔特私人有限公司 | Separation apparatus and method |
| US9381454B2 (en) | 2009-05-19 | 2016-07-05 | Z-Filter (Pty) Ltd | Materials handling and treatment |
| EP3330202A4 (en) * | 2015-07-31 | 2019-04-24 | The Yokohama Rubber Co., Ltd. | CONVEYOR BELT |
| CN119022849A (en) * | 2024-09-14 | 2024-11-26 | 青岛巨航胶带有限公司 | A groove testing device for conveyor belt processing |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU583552B2 (en) * | 1984-11-12 | 1989-05-04 | Technosearch Pty. Limited | A conveying means |
| AU573309B2 (en) * | 1985-02-27 | 1988-06-02 | Sumitomo Heavy Industries Ltd. | Tubular belt conveyor |
| JPS63119515U (en) * | 1987-01-27 | 1988-08-02 | ||
| AU579506B2 (en) * | 1987-03-20 | 1988-11-24 | Bridgestone Corporation | Method of conveying materials and tubular belt conveyor therefor |
| SE461212B (en) * | 1988-06-23 | 1990-01-22 | Scaniainventor Conveyor Sicon | BRANDTRANSPORTOER |
| DE4121572C1 (en) * | 1991-06-29 | 1992-12-03 | Fa. Ernst Siegling, 3000 Hannover, De | |
| JP2517840B2 (en) * | 1994-01-24 | 1996-07-24 | 三ツ星ベルト株式会社 | Flexible conveyor belt |
| EP2830978A1 (en) * | 2012-03-30 | 2015-02-04 | P. Ellegaard A/S | Flexible closed belt conveyor |
| CN107235307B (en) * | 2017-06-29 | 2020-02-04 | 宁德师范学院 | Control method of automatic deviation adjusting device for circular pipe part of pipe belt conveyor |
| CN107344665B (en) * | 2017-06-29 | 2019-12-31 | 宁德师范学院 | A control method for a material conveyor pipe belt deflection adjustment device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1375744A (en) * | 1963-06-06 | 1964-10-23 | Erbo Maschb Erley & Bonninger | Belt conveyor |
| US3661244A (en) * | 1968-06-28 | 1972-05-09 | Masaaki Koyama | Automatic circular winding and releasing belt conveyor |
| DE2001910A1 (en) * | 1970-01-16 | 1971-07-22 | Koyama Masaaki | Cylindrical belt conveyor |
| FR2077707B1 (en) * | 1970-02-06 | 1974-06-14 | Koyama Masaaki | |
| JPS4720556U (en) * | 1971-02-22 | 1972-11-08 | ||
| JPS5511858Y2 (en) * | 1974-09-19 | 1980-03-14 | ||
| JPS5772506A (en) * | 1980-10-23 | 1982-05-06 | Bridgestone Corp | Conveyer belt |
-
1983
- 1983-12-29 JP JP58248580A patent/JPS60144211A/en active Granted
-
1984
- 1984-12-14 ZA ZA849760A patent/ZA849760B/en unknown
- 1984-12-18 GB GB08431907A patent/GB2152000B/en not_active Expired
- 1984-12-20 KR KR1019840008178A patent/KR950003263B1/en not_active Expired - Fee Related
- 1984-12-22 DE DE3447248A patent/DE3447248C2/en not_active Expired - Fee Related
- 1984-12-24 AU AU37182/84A patent/AU564136B2/en not_active Ceased
- 1984-12-28 CA CA000471119A patent/CA1228320A/en not_active Expired
- 1984-12-28 FR FR8420035A patent/FR2557546B1/en not_active Expired
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2195309A (en) * | 1986-09-30 | 1988-04-07 | Okazaki Haruo | A belt for a tubular belt conveyor |
| FR2604983A1 (en) * | 1986-09-30 | 1988-04-15 | Okazaki Haruo | BELT FOR TUBULAR BELT CONVEYOR |
| US5060787A (en) * | 1987-12-18 | 1991-10-29 | Lennart Tingskog | Belt conveyor and conveyor belt therefor |
| EP0336385A1 (en) * | 1988-04-07 | 1989-10-11 | Phoenix Aktiengesellschaft | Tubular conveyor belt |
| WO1992002439A1 (en) * | 1990-08-01 | 1992-02-20 | Continental Aktiengesellschaft | Conveyor belt for closed belt conveyors |
| US5232084A (en) * | 1990-08-01 | 1993-08-03 | Continental Aktiengesellschaft | Conveyor belt for a tubular conveying device |
| US6029801A (en) * | 1997-03-25 | 2000-02-29 | S.F.B.T. Societe Francaise De Bandes Transporteuses | Flexible conveyor belt and a conveyor making use thereof |
| FR2761352A1 (en) * | 1997-03-25 | 1998-10-02 | Sfbt Societe Francaise De Band | FLEXIBLE CONVEYOR BELT AND CONVEYOR USING THE SAME |
| EP0867383A1 (en) * | 1997-03-25 | 1998-09-30 | S.F.B.T. - Société Française de Bandes Transporteuses | Flexible transport belt and its use as a conveyor |
| RU2312051C1 (en) * | 2006-05-11 | 2007-12-10 | Государственное образовательное учреждение высшего профессионального образования Северо-Кавказский горно-металлургический институт (государственный технологический университет) (СКГМИ (ГТУ) | Belt conveyor |
| CN101500913B (en) * | 2006-06-13 | 2014-07-02 | Z-菲尔特私人有限公司 | Material Handling and Handling |
| US9381454B2 (en) | 2009-05-19 | 2016-07-05 | Z-Filter (Pty) Ltd | Materials handling and treatment |
| CN104854003A (en) * | 2012-10-10 | 2015-08-19 | Z-菲尔特私人有限公司 | Separation apparatus and method |
| CN104854003B (en) * | 2012-10-10 | 2018-02-13 | Z-菲尔特私人有限公司 | Separation equipment and methods |
| EP3330202A4 (en) * | 2015-07-31 | 2019-04-24 | The Yokohama Rubber Co., Ltd. | CONVEYOR BELT |
| AU2016302499B2 (en) * | 2015-07-31 | 2019-06-06 | The Yokohama Rubber Co., Ltd. | Conveyor belt |
| US11001449B2 (en) | 2015-07-31 | 2021-05-11 | The Yokohama Rubber Co., Ltd. | Conveyor belt |
| CN119022849A (en) * | 2024-09-14 | 2024-11-26 | 青岛巨航胶带有限公司 | A groove testing device for conveyor belt processing |
Also Published As
| Publication number | Publication date |
|---|---|
| AU564136B2 (en) | 1987-07-30 |
| AU3718284A (en) | 1985-07-04 |
| GB8431907D0 (en) | 1985-01-30 |
| JPS638008B2 (en) | 1988-02-19 |
| KR850004435A (en) | 1985-07-15 |
| ZA849760B (en) | 1985-08-28 |
| DE3447248C2 (en) | 1993-12-16 |
| FR2557546A1 (en) | 1985-07-05 |
| DE3447248A1 (en) | 1985-07-11 |
| CA1228320A (en) | 1987-10-20 |
| GB2152000B (en) | 1987-01-14 |
| KR950003263B1 (en) | 1995-04-07 |
| FR2557546B1 (en) | 1987-12-18 |
| JPS60144211A (en) | 1985-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19991218 |