GB2479181A - Brake Assembly for a Telescopic Conveyor - Google Patents

Brake Assembly for a Telescopic Conveyor Download PDF

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Publication number
GB2479181A
GB2479181A GB201005474A GB201005474A GB2479181A GB 2479181 A GB2479181 A GB 2479181A GB 201005474 A GB201005474 A GB 201005474A GB 201005474 A GB201005474 A GB 201005474A GB 2479181 A GB2479181 A GB 2479181A
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GB
United Kingdom
Prior art keywords
conveyor
brake
section
extendable
base section
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
Application number
GB201005474A
Other versions
GB201005474D0 (en
GB2479181B (en
Inventor
Mark Quinn
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.)
Telestack Ltd
Original Assignee
Telestack Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telestack Ltd filed Critical Telestack Ltd
Priority to GB201005474A priority Critical patent/GB2479181B/en
Publication of GB201005474D0 publication Critical patent/GB201005474D0/en
Publication of GB2479181A publication Critical patent/GB2479181A/en
Application granted granted Critical
Publication of GB2479181B publication Critical patent/GB2479181B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65G41/00—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames
    • B65G41/001—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames with the conveyor adjustably mounted on the supporting frame or base
    • B65G41/002—Pivotably mounted
    • 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
    • B65G15/22—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 comprising a series of co-operating units
    • B65G15/26—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 comprising a series of co-operating units extensible, e.g. telescopic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
    • B65G21/10—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof
    • B65G21/14—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof to allow adjustment of length or configuration of load-carrier or traction element

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Framework For Endless Conveyors (AREA)

Abstract

A telescopic conveyor has a base section (2,fig.2) an extendable section (4,fig.2) and a brake assembly capable of selectively acting on either section to provide braking between the sections. The brake assembly may consist of brake pads 24 on brake members 20,22, on lever arms 30,32, interconnected by a spring mounted to a ram. In the event that a cable which drives the extension of the extendable section (4,fig.2) fails, the brake assembly may prevent damage caused by the extendable section falling back into the base section (2,fig.2).

Description

Brake Assembly for a Telescopic Conveyor This invention relates a brake assembly for a telescopic conveyor, and more particularly to an emergency brake assembly for a telescopic conveyor for preventing uncontrolled movement of an extendable conveyor section with respect to a base conveyor section in the event of the failure of a winch cable.
Telescopic conveyors are commonly provided for the handling of articles. Such conveyors may be moved from location to location and adjusted in length so as to conform to the particular working environment, for example for unloading ships and/or for stockpiling granular or particulate material, for example on quarries.
Typically, telescopic conveyors consist of two or more conveyor sections adapted to be extended and retracted with respect to one another in telescopic fashion. In an example having two conveyor sections, an extendable section is telescopically mounted within a base section, the extendable section being supported on the base section at an outer end of the base section by a support assembly comprising one or more support rollers mounted on the base section.
Typically a winch is mounted on the tail end of the base section having a cable extending around a pulley provided at a head end of the base section and being connected to a tail end of the extendable section whereby the winch can wind in the cable to extend the extendable section with respect to the base section.
Due to poor maintenance or misuse it is possible for the cable to become damaged to trapped, resulting in failure of the cable. Should the cable fail when the extendable section is fully extended, there is a risk that the extendable section may uncontrollably slide back down the main section under the action of gravity. In such circumstances the extendable section may hit the tail end of the base section at considerable speed, resulting in damage to the conveyor.
According to the present invention there is provided a brake assembly for a telescopic conveyor, said brake assembly comprising at least one brake member to be mounted on one of a base section or an extendable section of a telescopic conveyor to selectively act on a portion of the other of the base section or extendable section of the conveyor to arrest relative movement between the extendable section and the base section.
Preferably said at least one brake member is adapted to be mounted on the base section of the conveyor to be moveable between a first position, wherein the brake member engages said portion of the extendable section of the conveyor, and a second position wherein the brake member is spaced from said portion of the extendable conveyor. Preferably biasing means, such as one or more springs, is provided for biasing the at least one brake member towards its first position, an actuating means being provided for urging the at least one brake member to its second position against the force of said biasing means, during normal operation of the conveyor.
In one embodiment said brake assembly comprises a pair of opposed brake members adapted to be mounted on opposite sides of the base section of the conveyor such that the extendable section is located between said brake members, said biasing means biasing said first and second brake member towards one another to engage either side of the extendable section located therebetween.
Preferably said brake members are respectively mounted on one or more lever arms pivotally mounted on either side of the base section for pivotal movement about respective pivot axes extending parallel to the longitudinal axis of the conveyor, said biasing means acting between distal ends of said lever arms in the manner of a brake caliper. Preferably said brake members are connected to said one or more lever arms at a location between the respective pivot point of said one or more lever arms on said base section and a connection between said biasing means and the respective lever arm to provide a mechanical advantage to enhance the force applied to the braking member by the biasing means.
According to a further aspect of the present invention there is provided a telescopic conveyor having a base section and an extendable section telescopically mounted on or within the base section, drive means being provided for extending the extendable section with respect to the base section to extend the overall length of the conveyor, the conveyor further comprising a brake assembly comprising at least one brake member mounted on one of the base section or the extendable section of the conveyor to selectively act on a portion of the other of the base section of the extendable section of the conveyor to arrest relative movement between the extendable section and the base section.
In a preferred embodiment the brake assembly comprises a pair of opposed brake members mounted on opposite sides of the base section of the conveyor such that the extendable section is located between said brake members, said biasing means biasing said first and second brake member towards one another to engage either side of the extendable section located therebetween.
Preferably said brake member engage respective elongate side members of the extendable conveyor. Pads of a high friction and hard wearing material may be provided on each brake member for engaging respective side members of the extendable conveyor.
Preferably each brake member is mounted on one or more lever arms pivotally mounted on a respective side of the base section for pivotal movement about a respective pivot axis extending parallel to the longitudinal axis of the conveyor, said biasing means and said actuating means acting between distal ends of the one more lever arms of the brake members in the manner of a brake caliper. Preferably said lever arms extending in a substantially downwards direction such that said biasing means and said actuating means extend between the one or more lever arms mounted on each side of the base conveyor underneath the base conveyor. Preferably said brake members are connected to said one or more lever arms at a location between the respective pivot point of said one or more lever arms on said base section and a connection between said biasing means and the respective lever arm to provide a mechanical advantage to enhance the force applied to the braking member by the biasing means.
The drive means may comprise a winch mounted on the tail end of the base section, a cable extending around a pulley provided at a head end of the base section and being connected to a tail end of the extendable section whereby the winch can wind in the cable to extend the extendable section with respect to the base section.
An embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:-Fig. 1 is a side view of a telescopic conveyor in a retracted position; Fig. 2 is a side view of the telescopic conveyor of Fig. 1 in an extended position; Fig. 3 is a sectional view of a brake assembly for a telescopic conveyor in accordance with an embodiment of the present invention; and Fig. 4 is a detailed sectional view of one side of the brake assembly of Figure 3.
A known telescopic conveyor system is shown in Figures 1 and 2. The telescopic conveyor comprises an elongate base section 2 and a coaxially mounted elongate extendable section 4 telescopically mounted within the base section 2 to be reciprocally moveable with respect to the base section 2 between a retracted position (shown in Figure 1) and an extended position (shown in Figure 2). Both the base section 2 and the extendable section 4 have a generally rectangular cross-section, with the cross-section of the extendable section 4 being smaller than the cross-section of the base section 2 SO that the extendable section 4 can be received within the base section 2. The base section 2 and extendable section 4 each comprise a hollow lattice of frame members and interconnecting bracing members, to provide a light but strong rigid load supporting structure, as is known in the art.
A conveyor belt 6 is mounted on each of the base section 2 and extendable section 4 to provide a conveying surface along an upper region of the conveyor.
The extendable section 4 is supported at an outer end of the base section 2 on a support assembly comprising a pair of spaced apart support rollers 10 extending transversely between lower sides of the base section 2, such that that the support rollers 10 extend below the extendable section 4, whereby the lower frame members of the extendable section 4 can roll along the support rollers 10 during movement of the extendable section 4 between its retracted and extended positions.
Additional support rollers (not shown) are provided on an inner end of the base section at an upper side thereof to support an inner end of the extendable section. The extendable section 4 extends in cantilevered fashion from the base section 2.
A winch is mounted in the tail end 12 of the base section 2 having a cable 14 extending around a pulley provided at a head end of the base section 2 and being connected to a tail end of the extendable section 4 whereby the winch can wind in the cable to extend the extendable section 4 with respect to the base section 2.
Due to poor maintenance or misuse it is possible for the cable to become damaged to trapped, resulting in failure of the cable. Should the cable fail when the extendable section 4 is fully extended, there is a risk that the extendable section 4 may uncontrollably slide back down the base section 2 under the action of gravity. In such circumstances the extendable section 4 may hit the tail end 12 of the base section 2 at considerable speed, resulting in damage to the.
To prevent this from happening the telescopic conveyor may be provided with a brake assembly in accordance with an embodiment of the present invention for arresting movement of the extendable section of the conveyor with respect to the base section in the event of an emergency, as illustrated in Figures 3 and 4.
The brake assembly comprises a pair of spaced part brake members 20,22 arranged on either side of the extendable section 4 of the conveyor to selectively engage the outer side of lower frame members 14,16 of the extendable section to arrest movement of the extendable section 4 with respect to the base section 2.
Each brake member 20,22 comprises a brake pad 24 formed from a hard wearing and high friction material, for example a polymeric material such as rubber or any other suitable material, mounted on an support member 26 to extend alongside and parallel to a portion of a respective lower frame member 14,16 of the extendable section 4 of the conveyor. Each support member 26 is pivotally mounted on a pair of parallel spaced apart lever arms 30,32 (only one shown on each side in Figure 3) via outwardly extending support arms 28, each lever arm 30,32 being pivotally mounted on a side portion of the base section 2 of the conveyor to extend outwardly and downwardly on a respective side of the base section 2 of the conveyor.
The support arms 28 of each brake member 20,22 may be supported by a respective horizontally extending lower frame member of the base frame, wherein the arms 28 extend over the top of and rest upon a respective lower frame member.
The lower ends of the lever arms 30,32 on either side of the base section 2 are interconnected by one or more springs 40 whereby the lever arms 30,32 are biased towards one another to bias the brake pad 24 of each brake member 20,22 into contact with a respective lower frame member 14,16 of the extendable section 4 of the conveyor such that the sides of the extendable section 4 are clamped between the brake members 20,22. The relative distance between the respective pivot points of the brake members 20,22 and the one or more springs 40 on the lever arms 30,32 provides a mechanical advantage to maximise the force applied to the sides of the extendable member 4 by the brake members 20,22.
A hydraulically actuated ram 50 is also mounted between the lever arms on either side of the base section in parallel with the one or more springs 40 to apply an opposing force to urge the brake pads away from the extendable section of the conveyor to allow the extendable section 4 to move relative to the base section 2 during normal operation of the conveyor.
When it is desired to extend or retract the extendable section 4 with respect to the base section 2, pressurised hydraulic fluid is supplied to the ram 50 to urge the brake member 20,22 away from the sides of the extendable section 4. Should the winch cable snap or the conveyor malfunction for any other reason, a control system may be provided whereby the ram is deactivated allowing the springs to urge the brake members into contact with the lower frame members of the extendable section to arrest movement of the extendable section with respect to the base section.
The invention is not limited to the embodiment(s) described herein but can be amended or modified without departing from the scope of the present invention.

Claims (16)

  1. Claims 1. A brake assembly for a telescopic conveyor, said brake assembly comprising at least one brake member to be mounted on one of a base section or an extendable section of a telescopic conveyor to selectively act on a portion of the other of the base section or extendable section of the conveyor to arrest relative movement between the extendable section and the base section.
  2. 2. A brake assembly as claimed in claim 1, wherein said at least one brake member is adapted to be mounted on the base section of the conveyor to be moveable between a first position, wherein the brake member engages said portion of the extendable section of the conveyor, and a second position wherein the brake member is spaced from said portion of the extendable conveyor.
  3. 3. A brake assembly as claimed in claim 2, wherein biasing means, such as one or more springs, is provided for biasing the at least one brake member towards its first position, an actuating means being provided for urging the at least one brake member to its second position against the force of said biasing means, during normal operation of the conveyor.
  4. 4. A brake assembly as claimed in claim 3, wherein said brake assembly comprises a pair of opposed brake members adapted to be mounted on opposite sides of the base section of the conveyor such that the extendable section is located between said brake members, said biasing means biasing said first and second brake member towards one another to engage either side of the extendable section located therebetween. 0)
    C\J
  5. 5. A brake assembly as claimed in claim 4, wherein said brake members are respectively mounted on one or more lever arms pivotally mounted on either side of the base section for pivotal movement about respective pivot axes extending parallel to the longitudinal axis of the conveyor, said biasing means acting between distal ends of said lever arms in the manner of a brake caliper.
  6. 6. A brake assembly as claimed in claim 5, wherein said brake members are connected to said one or more lever arms at a location between the respective pivot point of said one or more lever arms on said base section and a connection between said biasing means and the respective lever arm to provide a mechanical advantage to enhance the force applied to the braking member by the biasing means.
  7. 7. A telescopic conveyor having a base section and an extendable section telescopically mounted on or within the base section, drive means being provided for extending the extendable section with respect to the base section to extend the overall length of the conveyor, the conveyor further comprising a brake assembly comprising at least one brake member mounted on one of the base section or the extendable section of the conveyor to selectively act on a portion of the other of the base section of the extendable section of the conveyor to arrest relative movement between the extendable section and the base section.
  8. 8. A telescopic conveyor as claimed in claim 7, wherein the brake assembly comprises a pair of opposed brake members mounted on opposite sides of the base section of the conveyor such that the extendable section is located between said brake members, said biasing means biasing said first and second brake member towards one another to engage either side of the extendable section located therebetween.
  9. 9. A telescopic conveyor as claimed in claim 8, wherein said brake members engage respective elongate side members of the extendable conveyor.
  10. 10. A telescopic conveyor as claimed in claim 9, wherein pads of a high friction and hard wearing material may be provided on each brake member for engaging respective side members of the extendable conveyor.
  11. 11. A telescopic conveyor as claimed in any of claims 8 to 10, wherein each brake member is mounted on one or more lever arms pivotally mounted on a respective side of the base section for pivotal movement about a respective pivot axis extending parallel to the longitudinal axis of the conveyor said biasing means and said actuating means acting between distal ends of the one more lever arms of the brake members in the manner of a brake caliper.
  12. 12. A telescopic conveyor as claimed in claim 11, wherein said lever arms extend in a substantially downwards direction such that said biasing means and said actuating means extend 0) between the one or more lever arms mounted on each side of the base conveyor underneath the C'J base conveyor.
  13. 13. A telescopic conveyor as claimed in claim 12, wherein said brake members are connected to said one or more lever arms at a location between the respective pivot point of said one or more lever arms on said base section and a connection between said biasing means and the respective lever arm to provide a mechanical advantage to enhance the force applied to the braking member by the biasing means.
  14. 14. A telescopic conveyor as claimed in any of claims 7 to 13, wherein the drive means comprises a winch mounted on the tail end of the base section, a cable extending around a pulley provided at a head end of the base section and being connected to a tail end of the extendable section whereby the winch can wind in the cable to extend the extendable section with respect to the base section.
  15. 15. A brake assembly substantially as herein described with reference to the accompanying drawings.
  16. 16. A telescopic conveyor substantially as herein described with reference to the accompanying drawings. C') a) (\J
GB201005474A 2010-03-31 2010-03-31 Brake assembly for a telescopic conveyor Active GB2479181B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201005474A GB2479181B (en) 2010-03-31 2010-03-31 Brake assembly for a telescopic conveyor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201005474A GB2479181B (en) 2010-03-31 2010-03-31 Brake assembly for a telescopic conveyor

Publications (3)

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GB201005474D0 GB201005474D0 (en) 2010-05-19
GB2479181A true GB2479181A (en) 2011-10-05
GB2479181B GB2479181B (en) 2014-08-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2431925R1 (en) * 2012-05-28 2013-12-05 Lopez Miguel Angel Lopez Wind power generator equipment for electric vehicles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2223202A1 (en) * 1997-11-27 1999-05-27 Thor Steel & Welding Ltd. Support assembly for telescopic conveyor system
US6929113B1 (en) * 2004-03-17 2005-08-16 Hoover Conveyor & Fabrication Corp. Telescoping stacking conveyor having a single conveyor belt and single drive mechanism for the belt
US7284947B1 (en) * 2006-10-26 2007-10-23 Superior Industries, L.L.C. Braced telescoping support strut and system
US7448486B1 (en) * 2007-08-10 2008-11-11 Masaba, Inc. Telescoping conveyor drive system
WO2009006723A1 (en) * 2007-07-12 2009-01-15 Thor Global Enterprises Ltd. Undercarriage for a telescopic frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2223202A1 (en) * 1997-11-27 1999-05-27 Thor Steel & Welding Ltd. Support assembly for telescopic conveyor system
US6929113B1 (en) * 2004-03-17 2005-08-16 Hoover Conveyor & Fabrication Corp. Telescoping stacking conveyor having a single conveyor belt and single drive mechanism for the belt
US7284947B1 (en) * 2006-10-26 2007-10-23 Superior Industries, L.L.C. Braced telescoping support strut and system
WO2009006723A1 (en) * 2007-07-12 2009-01-15 Thor Global Enterprises Ltd. Undercarriage for a telescopic frame
US7448486B1 (en) * 2007-08-10 2008-11-11 Masaba, Inc. Telescoping conveyor drive system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2431925R1 (en) * 2012-05-28 2013-12-05 Lopez Miguel Angel Lopez Wind power generator equipment for electric vehicles

Also Published As

Publication number Publication date
GB201005474D0 (en) 2010-05-19
GB2479181B (en) 2014-08-06

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