US3368417A - Segmental belting - Google Patents

Segmental belting Download PDF

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Publication number
US3368417A
US3368417A US554219A US55421966A US3368417A US 3368417 A US3368417 A US 3368417A US 554219 A US554219 A US 554219A US 55421966 A US55421966 A US 55421966A US 3368417 A US3368417 A US 3368417A
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US
United States
Prior art keywords
cords
segment
segment member
reinforcement
ferrule
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US554219A
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English (en)
Inventor
Jenkins Peter John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dunlop Rubber Co Ltd
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Dunlop Rubber Co Ltd
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Filing date
Publication date
Application filed by Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
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Publication of US3368417A publication Critical patent/US3368417A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/22—Driving-belts consisting of several parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/16—Belt fasteners
    • Y10T24/1608—Hinged
    • Y10T24/162—Pintle pin connected belt ends

Definitions

  • ABSTRACT F THE DISCLOSURE A segment member for segmental lbelting with a reinforcement layer of fabric or steel having an extensibility of at least 4 percent being disposed substantially parallel to the longitudinal axis of the segment member and embedded in a flexible material.
  • the segment member has castellated ends with ferrules enclosed by substantially inextensible cords. The ends of the cords extend a short distance into the segment member either inside or outside of the reinforcement layers.
  • This invention relates to segment members for segmental belting and to segmental belting comprising such segment members.
  • a segment member for segmental belting comprises a reinforcement (as hereinafter defined) embedded in a flexible material and has castellated ends comprising ferrules each of which is enclosed by substantially inextensible cords the ends of which extend a short distance into the segment member parallel to the longitudinal axis of the segment member, the ferrules being arranged in aligned relationship transverse the segment member to receive a tie-bar.
  • reinforcement as used in this specification there is meant a reinforcement comprising one or more layers of a woven or non-woven textile fabric or of steel cords having an extensibility at break of at least 4 percent, the warp yarns of the woven fabric, or the yarns of the non-Woven textile fabric, or the steel-cords being disposed substantially parallel to the longitudinal axis of the segment member. It is to be understood that in addition to the reinforcement layers defined above, other layvers of non-woven textile fabrics or of steel cords may be incorporated into the reinforcement.
  • the reinforcement when the reinforcement comprises textile cords or steel cords which are disposed parallel to the longitudinal axis of the segment member, then the reinforcement preferably also contains non-woven textile cords or steel cords which are disposed at right angles to the longitudinal axis of the segment member.
  • the reinforcement comprises several layers of non-woven fabric or of steel cords, then it is preferred to have a layer of cords which are disposed at 90 with respect to the longitudinal axis of the segment member between adjacent reinforcement layers as hereinbefore defined.
  • a segmental belt comprises one o ⁇ r more segment members laccording to the immediately preceding paragraph, and a tie-bar to connect adjacent segment ends, said segment member or members being arranged so that the castellations on one segment end to be connected are staggered with respect to the castellations on the adjacent segment end to be connected.
  • the ends of the substantially inextensible cords such as steel cords, enclosing the ferrules extend a short distance into the segment member parallel to the longitudinal axis of the segment member.
  • the reinforcement of the segment member comprises at least two reinforcement layers, and in this case the ends of the substantially inextensible cords enclosing the ferrules enclose or are enclosed b-y the ends of the reinforcement layers.
  • the ends of the cords enclosing the ferrules are enclosed by the ends of the reinforcement layers, and in such a case the ends of the reinforcement layers may be provided with a chafer strip,
  • the chafer strip should preferably lbe of a material which can be easily bonded to the flexible composition and the chafer strip should be easily penetrated by the flexible composition.
  • a suitable material for the chafer strip is an open-woven nylon fabric.
  • the reinforcement comprises one or more layers of woven or non-woven textile fabric or of steel cords having an extensibility at break of at least-4 percent which are disposed parallel to the longitudinal axis of the segment member.
  • the warp threads of the fabric are disposed parallel to the longitudinal axis of the segment member and are made of a substantially inextensible material such as nylon.
  • the weft threads of the woven fabric are disposed at to the warp threads.
  • the weft threads may also be of nylon or they may be of any other textile material.
  • a particularly useful weft thread comprises nylon yarns and cotton yarns doubled together and in this case the cotton assists in bonding the fabric to the flexible material in which the reinforcement is embedded.
  • the cords are disposed parallel to the longitudinal axis of the segment member, and these cords can be made of a textile material such as nylon but are preferably made of steel and have an extensibility at break of at least 4 percent.
  • Steel cords having an extensibility at break of 4 percent or more can be produced by overtwisting the cords during their manufacture.
  • a particularly suitable cord is one having a construction in which the strand twist and the cable twist is the same, and steel cords having this construction usually have an elongation at break of from 8 percent to l2 percent.
  • the ferrules which are enclosed by substantially inextensible cords, such as steel cords or textile cords, which preferably have an extensibility at break of less than 4 percent to form the castellations preferably have external flanges at each end, and the substantially inextensible cords, which are arranged in side by side relationship and disposed parallel to the longitudinal axis of the segment member, enclose the ferrule between the flanges. In this manner, inadvertent transverse movement of the ferrules is prevented,
  • the ferrule should be made of a rigid material and can be a metal ferrule such as a stainless steel ferrule or 4can be made of a rigid polymer.
  • the substantially inextensiblecords such as steel cords, enclosing each ferrule should preferably be stronger than the substantially inextensible cords forming the reinforcement layers so that when adjacent segment ends are connected, the joint produced will have a strength at least equal t0 the strength of the segment member.
  • the substantially inextensible cords enclosing each ferrule are embedded in the flexible composition which width equal to the length of the ferrule so that the edges of the insert enclose the flanges at each end of the ferrule and in this way the substantially inextensible cords enclosing the ferrule are protected.
  • the U-shaped insert should be of rigid material and metal inserts, such as stainless steel inserts, are preferred, although inserts made of rigid polymers can be used.
  • the ferrules are arranged in aligned relationship transverse the segment member so that a tie-bar may be inserted through the ferrules.
  • the ferrules should preferably be of equal length, and in such a case the gap between the ends of adjacent ferrules, i.e. the gap between adjacent castellations, is of a width slightly greater than the length of a ferrule so that the castellations on one segment end to be connected can fit within the gaps between the castellations on the other segment end to be connected.
  • the castellations on the ends of the segment member or members are of substantially the same length, which length is such that when adjacent segment ends are connected the ferrules on one end are in aligned relationship with the ferrules on the other end, so that a tie-bar may be inserted through the ferrules to connect said segment ends.
  • the tie-bar is preferably made of metal, and a suitable tie-bar is one made of cabled die-formed steel wires.
  • FIGURE 1 shows a plan view of a segment end with various components cut away to show the construction in detail.
  • FIGURE 2 shows a section through a segment end taken along the line A--A' of FIGURE 1.
  • FIGURE 3 shows a section through a castellation illustrating an alternative construction to that shown in FIG- URES l and 2.
  • FIGURE 4 shows a sectional view of an alternative embodiment with the inextensible cords outside the reinforcement layers.
  • FIGURE 5 shows a plan view of two castellated ends interconnected by a tie-bar
  • FIGURE 6 shows alternate materials used for the ferrules and reinforcement.
  • a segment member 1 has a reinforcement consisting of two reinforcement layers 2 and 3 of rubber-coated steel cords 4, the cords in each layer 2 and 3 being arranged in side by side relation and disposed parallel to the longitudinal axis of the segment member 1.
  • the ends 5 and 6 of the steel cords 4 enclose the ends 7 of a strip 8 of rubber-coated steel cords 9 which enclose a stainless steel ferrule 10.
  • the stainless steel ferrule 10 is provided with external flanges 11 and the steel cords 9 enclose the ferrule 10 between the flanges 11.
  • a steel wire staple 12 holds together the ends of the strip 8 of cords 9 which are disposed parallel to the longitudinal axis of the segment member.
  • the purpose of the steel wire staple 12 is to hold the cords 9 around the ferrule 10 during manufacture of the segment member.
  • the reinforcement and the castellations 13 have a covering of a vulcanised rubber composition 14 which forms the working surfaces of the segment member.
  • a belt comprises one or more segment members constructed as shown in FIGURES l and 2, adjacent ends of the segment member or members being connected by means of a cabled, die-formed steel tie-bar. Adjacent segment ends are arranged so that the castellations on one end to be connected are staggered with respect to, and fit within the gaps between, the castellations on the other end to be connected.
  • a stainless steel ferrule 10 having external flanges 11 is enclosed between the flanges 11 by a strip 8 of rubber-coated steel cords 9 (4 ends of 21 X 0.0058" steel wire arranged in side bv side relationship and cold calendered with a natural-rubber/cobalt linoleate compound).
  • a steel Wire staple 12 is looped around the strip 8 of cords 9 to hold the cords 9 around the ferrule 10.
  • Two reinforcement layers 2 and 3 of rubber-coated steel cords 4 (9 x 0.0058" zinc-plated steel wire, the cords being arranged in side by side relationship and cold calendered with a natural-rubber/ cobalt linoleate composition) in which the cords are disposed parallel to the longitudinal axis of the layer are laid one upon the other.
  • the ends 7 of the strip 8 lof rubber-coated steel cords 9 enclosing a ferrule are placed between the ends 5 and 6 of the reinforcement layers 2 and 3 so that the ferrule 10 and a short length of the cords 9 project from the end of the reinforcement, to form a castellation 13.
  • the castellations 13 are of substantially the same length and the distance between castellations is slightly greater than the length of a ferrule 10. The reinforcement layers 2 and 3 are then pressed together.
  • the assembly including the castellations, is covered with sheets of a vulcanisable rubber composition 14 of width slightly greater than the width of the reinforcement layers 2 and 3, and the covered assembly is moulded under heat and pressure to vulcanise the rubber composition 14, mould inserts being used to produce the gaps between castellations.
  • the assembly is moulded so as to produce shaped ends to the segment member so that the thickness at the castellations is slightly greater than at the centre of the segment member.
  • one or more segment members are assembled end to end so that the castellations on one end to be connected fit within the gaps between the castellations on the adjacent end to be connected, and a cabled die-formed steel tie-bar 20 is inserted through the aligned ferrules.
  • the tie-bar preferably has a length equal to the width of the segment member.
  • FIGURE 3 of the accompanying drawings shows a section through a castellation 15 having a similar construction to the castellations 13 shown in FIGURES 1 and 2.
  • a U- shaped metal insert 16 is provided to protect the steel cords 9 where these pass around the ferrule 10.
  • the ends of the U-shaped insert 16 extend a short distance into the segment member and the insert 116 is embedded in the flexible covering material 14.
  • the width of the insert 1.6 is substantially equal to the length of the ferrule 10 so that the edge of the insert 16 engage the external flanges 11 on the ferrule 10.
  • FIGURE 4 illustrates an embodiment wherein the substantially inextensible steel cords 9 enclosing the ferrules 10 are placed outside the reinforcement layers 2 and 3 as previously described.
  • FIGURE 5 illustrates the positioning of the steel tie-bar 20 in relation to the castellations 13.
  • FIGURE 6 illustrates the use of alternate materials as previously described such as a woven fabric reiforcement layer 4a, a polymeric ferrule 10a with a woven inextensible cord 9a enclosing it and embedded in a synthetic resin composition.
  • the reference numersals are similar to those previously used with the letter a subscript added.
  • Segmental belting constructed in accordance with the present invention is advantageous in that the segment members forming the belting are easily connected whilst the joint formed can have a strength at least equal to the strength of the segment members.
  • the present invention obviates the difficulty hitherto encountered that the joint formed between segment members has been weak and liable to failure.
  • a further advantage of the present invention is that if the joint fails due to damage to the tie-bar, a new tie-bar can be simply and economically inserted or if a segment is damaged a new segment can be inserted quickly without splicing. This is particularly so in the case of conveyor belting where long delays in joint repairs results in a great loss of transmitted material.
  • a segment member for segmental belting comprising reinforcement means embedded in a flexible plastic material and castellated portions, said portions comprising ferrules each of which is enclosed by substantially inextensible cords, the ends of which extend a short distance into said segmental member parallel to the longitudinal axis thereof, said ferrules being arranged in aligned relationship transverse to the segment member for receiving a tie bar therein.
  • a segmental member according to claim 1 in which the reinforcement means comprises at least two reinforcement layers and in which the ends of the substantially inextensible cords enclosing the ferrules are enclosed by the ends of the reinforcement layers.
  • a segment member according to claim 1 in which the ends of the inextensible cords enclosing the ferrules enclose therein the ends of at least one reinforcement layer.
  • a segment member according to claim 1 wherein said ferrule is made of stainless steel.
  • a segment member according to claim 13 in which a U-shaped insert of a width substantially equal to the length of the ferrule is interposed between the flexible covering material and the substantially inextensible cords enclosing the ferrule.
  • a segmental belt comprising a plurality of segment members each according to claim 1 and a tie bar connecting adjacent segmental ends, said segmental members being arranged so that the castellated ends on one end are connected in staggered relationship with respect to the castellated ends on the adjacent segmental ends.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
US554219A 1963-09-12 1966-05-31 Segmental belting Expired - Lifetime US3368417A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3591463 1963-09-12
GB3281664 1964-08-12

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US3368417A true US3368417A (en) 1968-02-13

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SE (1) SE301291B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664490A (en) * 1968-09-30 1972-05-23 Bridgestone Tire Co Ltd Joint reinforced conveyor belt
US9556930B2 (en) 2014-08-18 2017-01-31 Flexible Steel Lacing Company Conveyor belt fastener and method of manufacture
USD808253S1 (en) 2014-08-18 2018-01-23 Flexible Steel Lacing Company Fastener for a conveyor belt
US12055195B2 (en) 2022-01-28 2024-08-06 Flexible Steel Lacing Company Conveyor belt fastener

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751065A (en) * 1956-06-19 Thomson
US2916136A (en) * 1956-05-14 1959-12-08 Us Rubber Co Sectional conveyor belt manufacture
US3144930A (en) * 1960-11-24 1964-08-18 Continental Gummi Werke Ag Conveyor belt structure
US3212627A (en) * 1962-10-31 1965-10-19 Dunlop Rubber Co Reinforced mechanical belting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751065A (en) * 1956-06-19 Thomson
US2916136A (en) * 1956-05-14 1959-12-08 Us Rubber Co Sectional conveyor belt manufacture
US3144930A (en) * 1960-11-24 1964-08-18 Continental Gummi Werke Ag Conveyor belt structure
US3212627A (en) * 1962-10-31 1965-10-19 Dunlop Rubber Co Reinforced mechanical belting

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664490A (en) * 1968-09-30 1972-05-23 Bridgestone Tire Co Ltd Joint reinforced conveyor belt
US9556930B2 (en) 2014-08-18 2017-01-31 Flexible Steel Lacing Company Conveyor belt fastener and method of manufacture
US9829067B2 (en) * 2014-08-18 2017-11-28 Flexible Steel Lacing Company Conveyor belt fastener and method of manufacture
USD808253S1 (en) 2014-08-18 2018-01-23 Flexible Steel Lacing Company Fastener for a conveyor belt
US10107359B2 (en) * 2014-08-18 2018-10-23 Flexible Steel Lacing Company Conveyor belt fastener and method of manufacture
US10385943B2 (en) 2014-08-18 2019-08-20 Flexible Steel Lacing Campany Conveyor belt fastener and method of manufacture
USD882382S1 (en) 2014-08-18 2020-04-28 Flexible Steel Lacing Company Fastener for a conveyor belt
USD914491S1 (en) 2014-08-18 2021-03-30 Flexible Steel Lacing Company Fastener for a conveyor belt
US12055195B2 (en) 2022-01-28 2024-08-06 Flexible Steel Lacing Company Conveyor belt fastener

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Publication number Publication date
SE301291B (fr) 1968-05-27

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