WO2010071935A1 - Appareil et procédé de fabrication d'un étrier en câble - Google Patents

Appareil et procédé de fabrication d'un étrier en câble Download PDF

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Publication number
WO2010071935A1
WO2010071935A1 PCT/AU2009/001689 AU2009001689W WO2010071935A1 WO 2010071935 A1 WO2010071935 A1 WO 2010071935A1 AU 2009001689 W AU2009001689 W AU 2009001689W WO 2010071935 A1 WO2010071935 A1 WO 2010071935A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
downstream
upstream
clamp
bulb
Prior art date
Application number
PCT/AU2009/001689
Other languages
English (en)
Inventor
David William Evans
Mark A. Zercher
Original Assignee
Dywidag-Systems International Pty Limited
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42286796&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010071935(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from AU2008906643A external-priority patent/AU2008906643A0/en
Application filed by Dywidag-Systems International Pty Limited filed Critical Dywidag-Systems International Pty Limited
Priority to CA2743879A priority Critical patent/CA2743879C/fr
Priority to AU2009329824A priority patent/AU2009329824C1/en
Priority to MX2011006894A priority patent/MX2011006894A/es
Priority to US13/141,520 priority patent/US20110259072A1/en
Publication of WO2010071935A1 publication Critical patent/WO2010071935A1/fr

Links

Classifications

    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B7/00Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/16Auxiliary apparatus
    • D07B7/18Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
    • D07B7/187Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for forming bulbs in ropes or cables
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/006Anchoring-bolts made of cables or wires
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2207/00Rope or cable making machines
    • D07B2207/40Machine components
    • D07B2207/4004Unwinding devices
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2207/00Rope or cable making machines
    • D07B2207/40Machine components
    • D07B2207/4018Rope twisting devices
    • D07B2207/4022Rope twisting devices characterised by twisting die specifics
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2207/00Rope or cable making machines
    • D07B2207/40Machine components
    • D07B2207/409Drives
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B5/00Making ropes or cables from special materials or of particular form
    • D07B5/005Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties

Definitions

  • Rock bolts are utilised to secure the roof or walls of an underground mine, tunnel or other ground excavation by inserting the rock bolt into a bore hole drilled in the face of the rock to be secured and securing the rock bolt within the hole.
  • rock bolt is a cable bolt (sometimes called a strand bolt) that includes a plurality of wires helically wound into the form of a cable.
  • grout (or resin) is injected into the bore hole after insertion of the cable bolt so as to encapsulate at least part of the length of the cable, securing the cable bolt within the bore hole once the grout has set.
  • a rock face plate is typically attached to the exposed end of the cable bolt and arranged to bear against the rock face to thereby apply a compressive load against the rock face, stabilizing the same.
  • a pair of longitudinally spaced clamps are arranged to releasably clamp a cable, with one of the clamps being longitudinally displaceable in relation to the fixed clamp by way of an hydraulic ram.
  • the cable is clamped with the two clamps in a spaced apart relationship, with the displaceable clamp then being displaced toward the fixed clamp, thereby buckling the wires of the cable between the clamps, resulting in the formation of a bulb in the cable bolt.
  • both the pay-out reel and the take-up reel must be temporarily stopped whilst the clamps of the bulb forming device are activated to clamp the cable and form the bulb.
  • the pay-out reel and take-up reel must be brought back up to speed from a stationary state. Continually stopping and starting the pay-out and take-up reels limits production rates and is relatively inefficient, requiring the use of excess energy to stop and start the reels in each bulbing sequence.
  • the present invention provides an apparatus for manufacturing a cable bolt, said apparatus comprising: a rotatably driven pay-out reel for paying out a cable coiled in use about said pay-out reel; an upstream accumulator, located downstream of said pay-out reel, for accumulating cable advanced from said pay-out reel; a bulb forming device, located downstream of said upstream accumulator, for forming a bulb in cable advanced from said upstream accumulator; a cable drive, located downstream of said upstream accumulator, for advancing cable through said bulb forming device; wherein said pay-out reel is configured to rotate at least substantially continuously whilst said cable drive is configured to advance the cable after formation of each bulb to a position for formation of a subsequent bulb in the cable, said cable drive stopping a central portion of the cable downstream of said upstream accumulator for formation of the subsequent bulb, said upstream accumulator accumulating or decumulating.an upstream portion of the cable as required throughout operation of said apparatus to allow at least substantially continuous rotation of said pay-
  • said apparatus further comprises: a downstream accumulator, located downstream of said bulb forming device and said cable drive, for accumulating cable advanced from said bulb forming device; and a rotatably driven take-up reel for taking up cable advanced from said downstream accumulator; wherein said take-up reel is configured to rotate at least substantially • continuously, said downstream accumulator accumulating or decumulating a downstream portion of the cable as required throughout operation of said apparatus to allow at least substantially continuous rotation of said take-up reel whilst the central portion of the cable is stationary.
  • said cable drive is located upstream of said bulb forming device ' .
  • said upstream accumulator comprises a pulley mounted on a displaceable shaft.
  • said downstream accumulator comprises a pulley mounted on a displaceable shaft.
  • said bulb forming device comprises: a first clamp adapted to releasably clamp the central portion of the cable with the central portion of the cable extending along a longitudinal axis; a second clamp longitudinally spaced from said first clamp and adapted to releasably clamp the central portion of the cable with the central portion of the cable extending along said longitudinal axis; and a clamp displacement drive for longitudinally displacing said first clamp, relative to said second clamp, along said longitudinal axis.
  • the apparatus further comprises a cutting device, located downstream of said bulb forming device for cutting cable advanced from said bulb forming device, wherein said downstream accumulator and said take-up reel are displaceable from an operative position downstream of said bulb forming device.
  • the present invention provides an apparatus for manufacturing a cable bolt, said apparatus comprising: a cable supply; a bulb forming device, located downstream of said cable supply, for forming a -bulb in cable advanced from said cable supply; a cable drive, located downstream of said cable supply, for advancing cable through said bulb forming device; a downstream accumulator, located downstream of said bulb forming device and said cable drive, for accumulating cable advanced from said bulb forming device; and a rotatably driven take-up reel for taking up cable advanced from said downstream accumulator; wherein said said take-up reel is configured to rotate at least substantially continuously whilst said cable drive is configured to advance the cable after formation of each bulb to a position for formation of a subsequent bulb in the cable, said cable drive stopping a central portion of the cable between said cable supply and said downstream accumulator for formation of the successive bulb, said downstream accumulator accumulating or decumulating a downstream portion of the cable as required throughout operation of said apparatus to allow at least substantially continuous rotation of said take- up
  • said cable drive is located upstream of said bulb forming device.
  • said downstream accumulator comprises a pulley mounted on a displaceable shaft.
  • said bulb forming device comprises: a first clamp adapted to releasably clamp the central portion of the cable with the central portion of the cable extending along a longitudinal axis; a second clamp longitudinally spaced from said first clamp and adapted to releasably clamp the central portion of the cable with the central portion of the cable extending along said longitudinal axis; and a clamp displacement drive for longitudinally displacing said first clamp, relative to said second clamp, along said longitudinal axis.
  • the present invention provides a method for manufacturing a cable bolt, said method comprising: rotatably driving a pay-out reel having a cable coiled thereon to pay-out said cable from said pay-out reel; operating a cable drive, located downstream of said pay-out reel, to advance said cable through said cable drive and a bulb forming device; operating said cable drive to intermittently stop a central portion of said cable whilst continuing to rotatably drive said pay-out reel; whilst said central portion of said cable is stopped, forming a bulb in said central portion of said cable with said bulb forming device; and accumulating an upstream portion of said cable, located upstream of said cable drive and said bulb forming device, whilst said central portion of said cable is stopped.
  • the method typically further comprises the steps of: rotatably driving a take-up reel, located downstream of said bulb forming device, to take up cable advanced from said bulb forming device; and accumulating a downstream portion of said cable, located downstream of said cable drive and said bulb forming device, whilst said portion of said cable is being advanced " .
  • the present invention provides a method for manufacturing a cable bolt, said method comprising: supplying cable from a cable supply; operating a cable drive, located downstream of said cable supply, to advance said cable through said cable drive and a bulb forming device; rotatably driving a take-up reel, located downstream of said bulb forming device, to take up cable advanced from said bulb forming device; operating said cable drive to intermittently stop a central portion of said cable whilst continuing to rotatably drive said take-up reel; whilst said central portion of said cable is stopped, forming a bulb in said central portion of said cable with said bulb forming device; and accumulating a downstream portion of said cable, located downstream of said cable drive and said bulb forming device, whilst said portion of said cable is being advanced.
  • steps b) and h) are performed with a measuring device, output of said measuring device during steps d) and h) being disregarded when measuring displacement of said cable.
  • the shaft encoder may be mounted on a wheel engaging said cable, said shaft encoder measuring rotation of said wheel.
  • said shaft encoder may be coupled to a drive shaft of said cable drive, said shaft encoder measuring rotation of said drive shaft.
  • a force applied to said upstream clamp to displace said upstream clamp toward said downstream clamp is removed, thereby allowing said upstream clamp to be displaced away from said downstream clamp during elastic recovery of said portion of said cable and during classic recovery of said further portion of said cable.
  • Figure 1 is a plan view of an apparatus for manufacturing a cable bolt
  • Figure 2 A is a side elevation view of the apparatus of Figure 1 immediately prior to the formation of a bulb in a cable;
  • Figure 3 is a side elevation view of the cable drive of the apparatus of Figure 1 ;
  • Figure 4 A is a side elevation view of the bulb forming device of the apparatus of Figure 1 during advancement of a cable;
  • Figure 4B is a side elevation view of the bulb forming device of Figure 4A with the first and second clamps thereof clamping the cable in preparation for forming of a bulb;
  • Figure 4C is a side elevation view of the bulb forming device of Figure 4A during formation of a bulb.
  • the pay-out reel 20 in use is provided with a supply of cable 1 coiled on the payout reel 20.
  • the pay-out reel 20 is rotatably driven about an axle 21 by a drive motor 22 via a conventional reduction gearbox 23, chain 23a and driven sprocket 24 mounted on the axle 21.
  • the pay-out reel 20 advances the cable 1 to the upstream accumulator 40.
  • the upstream accumulator 40 is configured to accumulate and decumulate an upstream portion Ia of the cable 1, as will be discussed further below.
  • the upstream accumulator 40 is configured to engage the upstream portion Ia of the cable 1 and is here in the form of a "dancer roll", being a pulley 41, hereinafter referred to as the upstream dancer roll 41 , mounted on a displaceable shaft 42.
  • the shaft 42 is mounted on a block 45 which in turn is slidably mounted in the vertically extending slot 44 of a tower 43.
  • the slot 44 acts as a guide for the block 45.
  • a pneumatic cylinder 48 is mounted on the top of the tower 43.
  • the block 45 is coupled to a piston 49 located within the pneumatic cylinder 48 by way of a piston rod 50.
  • the pneumatic cylinder 48 is pressurized so as to apply downward pressure on the piston 49 and thereby apply a downward force on the block 45, forcing the upstream dancer roll 41 into engagement with the upstream portion Ia of the cable 1.
  • the pneumatic pressure within the cylinder 48 acts against the vertical force component of the tension in the upstream portion Ia of the cable 1 that results from deflection of the upstream portion Ia of the cable.
  • the tension in the upstream portion Ia of the cable 1 tends to increase and pressure in the cylinder 48 tends to decrease. Conversely, as deflection of the upstream portion Ia of the cable 1 decreases, the tension in the upstream portion Ia of the cable 1 tends to decrease and the pressure in the cylinder 48 tends to increase.
  • the cylinder 48 may be provided with a regulator, whereby pressure within the cylinder 48 remains constant.
  • the pneumatic cylinder 48 might be omitted, with the dancer roll 41 acting under its own weight due to gravity only to engage the upstream portion Ia of the cable 1.
  • the cable drive 60 is depicted in further detail in Figure 3.
  • the cable drive 60 comprises a pair of opposing caterpillar style endless belts 61, 62 that engage the upper and lower extremities respectively of the cable 1.
  • Each of the belts 61, 62 is driven through an endless loop about an upstream idler pulley 63, 64 and downstream driven pulley 65, 66.
  • the driven pulleys 65, 66 are driven by a drive motor 67 via a primary gear box 68, drive shaft 69 and secondary gear boxes 70.
  • the driven pulleys 65, 66 may each be directly driven by separate motors controlled to remain in phase by way of electronic variable speed drives.
  • FIG. 3 depicts two alternative configurations for such a shaft encoder.
  • a rotary shaft encoder is a known electro-mechanical device that translates rotational motion into an electrical signal, typically in the form of pulses, that may be readily converted into a measurement of linear displacement.
  • a rotary shaft encoder 71 A is directly coupled to the drive shaft 69 of the cable drive 60.
  • the drive motor 67 is in the form of a stepper motor that has an integral shaft encoder that is coupled to the drive shaft 69 by way of the drive motor output.
  • a rotary shaft encoder 71B is coupled to an encoder wheel 72 that engages the cable downstream (or alternatively, immediately upstream) of the cable drive 60.
  • An idler wheel 73 is located directly opposite the encoder wheel 72 to ensure that the encoder wheel 72 remains in contact with the cable 1 and is rotated by the advancing cable 1 without slippage.
  • the rotary shaft encoder 71 A, 71 B has a fixed housing 74A, 74B and rotating internal encoder shaft 75A, 75B that is fixed to the drive shaft 69 (in the configuration with the encoder 71 A) or the encoder wheel 72 (in the configuration with the encoder 71B).
  • the bulb forming device 80 is depicted in greater detail in Figures 4A through 4C.
  • the bulb forming device 80 is of the form described in Australian Patent Application No. 2005209572 to the present applicant, the entire contents of which are incorporated herein by cross-reference.
  • the bulb forming device 80 comprises first (upstream) and second (downstream) clamps 81, 82 adapted to releasably clamp the central portion Ib of the cable 1 extending along a longitudinal axis L defining the path of the central portion Ib of the cable 1 through the bulb forming device 80.
  • the first clamp 81 comprises serrated upper and lower jaws 83, 84 and a first hydraulic clamping ram 85 attached to the first clamp upper jaw 83 for driving the first clamp upper jaw 83 into engagement with the cable 1, thereby clamping the cable 1 between the first clamp upper and lower jaws 83, 84.
  • the first clamp guides 86 maintain the first clamp upper and lower jaws 83, 84 in alignment.
  • the second clamp 82 is similarly comprised of a second clamp upper jaw 87, second clamp lower jaw 88, a second hydraulic clamping ram 89 and second clamp guides 90.
  • the first clamp 81 is longitudinally displaceable relative to the second clamp 82 along the longitudinal axis L by way of a clamp displacement drive, here in the form of an hydraulic ram 91.
  • the plunger 91 A of the hydraulic ram 91 is attached to the first clamp 81 by way of a cam mechanism 92, described in greater detail in Australian Patent Application No. 2005209572, that rotates the first clamp 81 as it is longitudinally displaced by way of the hydraulic ram 91.
  • the cam mechanism 92 comprises a cylinder 93 that is rotationally fixed relative to the first clamp 81 and a cylindrical cam housing 94 that receives the cylinder 93.
  • the cylinder is provided with a cam follower in the form of a radially projecting pin 95 that engages an inclined cam slot 96 provided in the wall of the housing 94. Accordingly, longitudinal displacement of the cylinder 93 relative to the housing 94 results in rotation of the cylinder 93 relative to the housing 94 by virtue of the cam arrangement.
  • the hydraulic ram 91, cam housing 94, and second clamp 82 are each mounted on a fixed base 97. It is envisaged that the bulb forming device might omit the rotating cam mechanism 92 such that the first clamp 81 does not rotate as it is longitudinally displaced. It is also envisaged that the bulb forming device may take any of various other known forms.
  • a cutting device 98 Downstream of the bulb forming device 80 is a cutting device 98 that may be utilized to cut the cable 1 into predetermined lengths as desired.
  • the downstream accumulator 100 may be provided with a pneumatic cylinder 108 mounted on top of the tower 103.
  • the block 105 is coupled to a piston 109 located within the pneumatic cylinder 108 by way of a piston rod 110.
  • the pneumatic cylinder 108 operates in the same general manner as described above in relation to the cylinder 48 of the upstream accumulator 40, and may again be pressure regulated if desired. It is again also envisaged that the pneumatic cylinder 108 may be omitted, with the downstream dancer roll 101 acting under gravity only.
  • the take-up reel 120 is also of the same general form as the pay-out reel 20.
  • the take-up reel 120 advances the cable 1 from the downstream accumulator 100.
  • the take- up reel is rotatably driven about an axle 121 by a drive motor 121 via a reduction gearbox 123, chain 123a and driven sprocket 124 mounted on the axle 121.
  • a distribution wheel 125 Located upstream of the pay-out reel 120 is provided a distribution wheel 125 to laterally guide the downstream portion Ia of the cable 1 across the lateral extent of the take-up reel 120 so as to evenly coil the cable onto the take-up reel 120.
  • the distribution wheel 125 is laterally driven along an axle 126.
  • the drive motor 67 is stopped. This stops the central portion Ib of the cable 1.
  • the first and second clamps 81, 82 of the bulb forming device 80 are then activated by way of the first and second hydraulic rams 85, 89 to clamp the central portion Ib of the cable 1 between the first and second clamp upper and lower jaws 83, 84, 87, 88.
  • the hydraulic ram 91 is then activated to displace the first clamp 81 toward the second clamp 82, thereby compressing the section of cable 1 located between the first and second clamps 81, 82.
  • rotation of the first clamp 81 relative to the second clamp 82 partially unwinds (or opens) the wires of the section of cable 1 positioned between the first and second clamps 81, 82.
  • the compression and opening of the cable buckles the wires of the cable so as to form a bulb 2 as depicted (during the early stage of its formation) in Figure 4C.
  • the cable drive 60 is allowed to freely idle during advancement of the first clamp 81. This idling may be achieved either by disengaging the primary gearbox 68 or secondary gearboxes 70, or by utilizing a form of drive motor having an internal brake mechanism that may be disengaged to allow the output shaft to freely spin when the drive motor is stopped. Whilst the cable drive 60 is allowed to idle and the first clamp 81 is displaced during the bulb forming sequence, the section of cable clamped by the first clamp 81 and the cable upstream of the first clamp 81 advances a distance equal, to the displacement of the first clamp 81.
  • the section of the cable 1 that is clamped by the second clamp 82, and the portion of the cable 1 downstream of the second clamp 82 remains stationary. Given that it is the length of the finished cable product, and spacing between bulbs in the finished product, that is sought to be controlled, the displacement of the upstream section of the cable during the bulb forming sequence is to be disregarded when measuring displacement of the cable 1. Accordingly, whilst the cable drive 60 is allowed to idle, output from the shaft encoder is disregarded for purposes of measuring displacement of the cable 1.
  • the hydraulic pressure in the hydraulic ram 91 is released. This releases the force acting on the first clamp, thereby releasing compressive force acting on the bulbed central portion Ib of the cable. With release of the compressive force, the central portion Ib of the cable elastically recovers slightly under a springback effect, reducing the diameter of the bulb 2 slightly and allowing the first clamp 81 to displace slightly away from the second clamp 82 under idle. The minor displacement of the upstream portion of the cable 1 during this momentary "relaxing" step is again disregarded for the purpose of measuring displacement of the cable 1.
  • the first and second clamps 81, 82 are then released from the cable 1 and the first clamp 81 retracted to its original position by way of the hydraulic ram 91.
  • the cable drive 60 then re-engages and is operated to further drive the cable 1 through the bulb forming device 80.
  • the further displacement of the cable 1 whilst it is being driven by the cable drive 60 is again measured by the shaft encoder 71 A, 7 IB. Once the further displacement measured is equal to a further predetermined displacement, the drive motor 67 is again stopped so as to stop the central portion Ib of the cable 1 in readiness for formation of a further bulb.
  • displacement of the cable 1 is only measured for the purpose of determining when to stop the cable 1 whilst the cable 1 is being driven by the cable drive 60, with displacement during idling of the cable drive 60 being disregarded.
  • the displacement of the cable 1 might be measured throughout the full sequence, with the displacement of the cable 1 whilst the cable drive 60 is idling (which displacement is equal to the known displacement of the first clamp 81) being deducted from the total displacement for each cycle. This will result again in a displacement equal to the displacement measured during driving of the cable 1 by the cable drive 60.
  • the pay-out reel 20 and take-up reel 120 are rotatably driven by the respective drive motors 22, 122.
  • the continuous rotation of the pay-out and take-up reels 20, 120 is made possible by decoupling the pay-out and take-up reels 20, 120 from the intermittent operation of the cable drive 60 and bulb forming device 80 by the upstream and downstream accumulators 40, 100. Whilst the cable drive 60 is advancing the cable 1 , the increasing tension applied to the upstream portion Ia of the cable 1 by the cable drive 60 increases the upward force acting on the upstream dancer roll 41, such that the upstream dancer roll 41 is displaced upwardly tending to reduce the tension in the upstream portion Ia of the cable 1 back toward a constant value.
  • the upward movement of the upstream dancer roll 41 also tends to straighten out the path of the upstream portion of the cable 1, thereby effectively decumulating the cable.
  • the vertical position of the upstream dancer roll 41 is sensed by a photo-electric sensor, the output of which is processed by the control system which sends a proportional DC voltage output to the variable speed first cable drive motor 22, increasing the speed of the pay-out reel proportionally with the vertical position of the upstream dancer roll 41. This ensures that the upstream dancer roll 41 does not reach the uppermost limit of its range of travel and also tends to retain a relatively constant tension in the upstream portion Ia of the cable 1.
  • the control system further adjusts the speed of the drive motor 22 based on the torque load on the drive motor 22, which is directionally proportional to the tension in the upstream portion of the cable 1. With increased torque (resulting from increased cable tension) the speed of the first cable drive motor 22 will be increased so to increase the speed of the pay-out reel 20. This again tends to maintain constant tension in the cable 1.
  • the response sensitivity of this control system may be manually adjusted by the operator by way of a potentiometer.
  • the upstream dancer roll 41 will typically be located toward the top of its range of travel. Once the cable drive 60 stops, such that the central portion Ib of the cable 1 is no longer being advanced, no tension is applied to the upstream portion Ia of the cable 1 by the cable drive 60, thereby reducing tension in the upstream portion Ia of the cable 1.
  • the first dancer roll 41 under action of gravity and the pneumatic pressure within the first piston 48, will be displaced downwardly, deflecting the path of the upstream portion Ia of the cable 1 downwardly and tending to maintain the tension within the upstream portion Ia of the cable 1.
  • the pay-out reel 20 is able to at least substantially continue being rotatably driven by the drive motor 22, which merely adjusts its speed to compensate for intermittent stopping and starting of the cable drive 60 without the need to expend significant energy in stopping and re-starting.
  • the downstream accumulator 100 and take-up reel 120 operate in a similar manner to the upstream accumulator 40 and pay-out reel 20, although the operation is effectively in reverse.
  • Driving the cable 1 by the cable drive 60 tends to reduce the tension in the downstream portion Ic of the cable 1.
  • gravity and pressure within the cylinder 108 displace the downstream dancer roll 101 downwardly tending to increase the tension in the downstream portion Ic of the cable 1, compensating for the decrease in tension resulting from the operation of the cable drive 60.
  • Relatively constant tension is also tended to be maintained by increasing the speed of the take-up reel 120 as the downstream dancer roll 101 moves downwardly and when torque acting on the take- ' up reel 120 reduce ' s, utilising a control system equivalent to that discussed above in relation to the pay-out reel 20.
  • the downstream dancer roll 101 will typically be in a relatively low position, as generally depicted in Figure 2 A. Whilst the cable drive 60 is stopped, rotation of the take-up reel 120 will tend to increase the tension in the downstream portion of the cable 1, thereby driving the downstream dancer roll 101 ⁇ pward, decumulating cable and tending to reduce the otherwise increasing tension in the downstream portion Ia of the cable 1.
  • the upward displacement of the downstream dancer roll 101 and increase in tension in the downstream portion Ic of the cable 1 also results in control of the take-up reel 120 to reduce its speed. Again it is envisaged that, in certain applications, the take-up reel 120 may almost stop, or even momentarily stop if the downstream dancer roll 101 comes close to the uppermost extent of its range of travel during the bulb forming operation.
  • the distribution wheel 125 is cyclically displaced laterally so as to evenly coil the cable onto the take-up reel 120.
  • the cable 1 is continuously rolled onto the take-up reel 120 with bulbs 2 spaced along the cable 1.
  • the continuous length of bulbed cable may then be unwound from the take-up reel 120 and cut into desired lengths to form individual cable bolts. This will typically be conducted on site in the mine, hi scenarios where individual supplies of bulbed cable are desired that are less than the length of cable available from a single supply reel, the bulbed cable coiled onto the take-up reel 120 may be cut to the desired production length by way of the cutting device 98.
  • downstream accumulator 100 and take-up reel 120 might be laterally displaceable such that they can be displaced from an operable position within the production line downstream of the cutting device 98, for producing a coiled supply of cable bolts, to an inoperable position to the side of the production line to allow collection of individual lengths of cable bolt cut to length by the cutting device 98 in a tray moved into position downstream of the cutting device 98.
  • Embodiments are also envisaged where the pay-out reel and upstream accumulator are replaced with an alternate cable supply that might be advanced from the cable supply manually or by the cable drive 60, whilst retaining the downstream accumulator and take-up reel.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Wire Processing (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

L'invention concerne un appareil et procédé de fabrication d'un étrier en câble, comprenant une bobine débitrice (20) entraînée en rotation servant à dévider un câble (1) enroulé, en cours d'utilisation, autour de la bobine débitrice (20). Un accumulateur amont (40) est situé en aval de la bobine débitrice (20) en vue d'accumuler du câble (1) amené depuis la bobine débitrice (20). Un dispositif (80) de formation de renflements est situé en aval de l'accumulateur amont (40) afin de former un renflement (2) sur le câble (1) amené depuis l'accumulateur amont (40). Un organe (60) d'entraînement de câble est situé en aval de l'accumulateur amont (40) afin de faire avancer le câble (1) à travers le dispositif (80) de formation de renflements. La bobine débitrice (20) est configurée de façon à tourner de façon au moins sensiblement continue tandis que l'organe (60) d'entraînement de câble est configuré de façon à avancer le câble (1) après la formation de chaque renflement (2) jusqu'à une position de formation d'un renflement (2) suivant sur le câble. L'organe (60) d'entraînement de câble immobilise une partie centrale (1b) du câble en aval de l'accumulateur amont (40) en vue de la formation du renflement (2) suivant, l'accumulateur amont accumulant ou décumulant une partie amont (Ia) du câble (1) selon le besoin pendant toute la durée d'exploitation de l'appareil afin de permettre une rotation au moins sensiblement continue de la bobine débitrice (20) tandis que la partie centrale (1b) du câble (1) est immobile.
PCT/AU2009/001689 2008-12-24 2009-12-22 Appareil et procédé de fabrication d'un étrier en câble WO2010071935A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2743879A CA2743879C (fr) 2008-12-24 2009-12-22 Appareil et procede de fabrication d'un etrier en cable
AU2009329824A AU2009329824C1 (en) 2008-12-24 2009-12-22 Apparatus and method for manufacturing a cable bolt
MX2011006894A MX2011006894A (es) 2008-12-24 2009-12-22 Aparato y metodo para fabricar un perno de cable.
US13/141,520 US20110259072A1 (en) 2008-12-24 2009-12-22 Apparatus and method for manufacturing a cable bolt

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AU2008906643A AU2008906643A0 (en) 2008-12-24 Apparatus and method for manufacturing a cable bolt
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AU (1) AU2009329824C1 (fr)
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CL (1) CL2011001564A1 (fr)
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US20140033782A1 (en) * 2012-01-24 2014-02-06 Fci Holdings Delaware, Inc. Method and Apparatus for Continuous Bulbing of Stranded Cable
WO2024085787A1 (fr) * 2022-10-17 2024-04-25 Epiroc Rock Drills Aktiebolag Dispositif d'alimentation et procédé d'alimentation en élément de renforcement de roche

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AU2013202092B2 (en) 2012-04-02 2016-06-09 Fci Holdings Delaware, Inc. Manufacture of cable bolts
CN103600304B (zh) * 2013-11-25 2016-01-20 淮南鑫启发机电制造有限公司 防爆型矿用双锚索自动下料机

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US7458242B2 (en) * 2004-09-13 2008-12-02 Dywidag-Systems International Pty Limited Apparatus and method for manufacturing a rock bolt

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US6820657B1 (en) * 1999-09-13 2004-11-23 Garford Pty Ltd. Apparatus for the manufacture of rock bolts
US7458242B2 (en) * 2004-09-13 2008-12-02 Dywidag-Systems International Pty Limited Apparatus and method for manufacturing a rock bolt
US20060180230A1 (en) * 2005-02-17 2006-08-17 Jennmar Corporation Cable bulbing apparatus and method for forming bulbs in a cable bolt

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US20140033782A1 (en) * 2012-01-24 2014-02-06 Fci Holdings Delaware, Inc. Method and Apparatus for Continuous Bulbing of Stranded Cable
CN104220668A (zh) * 2012-01-24 2014-12-17 Fci特拉华控股有限公司 用于连续地形成多股绞合线缆的球结的方法和装置
AU2013202779B2 (en) * 2012-01-24 2016-01-21 Fci Holdings Delaware, Inc. Method and apparatus for continuous bulbing of stranded cable
WO2024085787A1 (fr) * 2022-10-17 2024-04-25 Epiroc Rock Drills Aktiebolag Dispositif d'alimentation et procédé d'alimentation en élément de renforcement de roche

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CA2743879A1 (fr) 2010-07-01
CA2743879C (fr) 2016-11-15
US20110259072A1 (en) 2011-10-27
MX2011006894A (es) 2011-09-27
AU2009329824A1 (en) 2010-07-01
AU2009329824B2 (en) 2011-04-14
CL2011001564A1 (es) 2012-02-03
AU2009329824C1 (en) 2015-11-26
AU2009329824B9 (en) 2014-10-09

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