US3060865A - Turntables - Google Patents

Turntables Download PDF

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Publication number
US3060865A
US3060865A US17378A US1737860A US3060865A US 3060865 A US3060865 A US 3060865A US 17378 A US17378 A US 17378A US 1737860 A US1737860 A US 1737860A US 3060865 A US3060865 A US 3060865A
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United States
Prior art keywords
track
rails
turntable
cars
plate
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Expired - Lifetime
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US17378A
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English (en)
Inventor
Tadeusz V Piotrowski
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Simon Carves Ltd
Carves Simon Ltd
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Carves Simon Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61J—SHIFTING OR SHUNTING OF RAIL VEHICLES
    • B61J1/00—Turntables; Traversers; Transporting rail vehicles on other rail vehicles or dollies

Definitions

  • This invention is concerned with improvements in and relating to turntables and in particular relates to means whereby flange-wheeled vehicles which normally run on rails may selectively be passed around a turntable in the known manner or may alternatively be passed straight across a chord thereof.
  • the invention is particularly adapted for use at the shaft head of a coal or ore mine where mine cars are brought to the surface in a mine cage and then have to be passed through a tippler for inversion and the removal of their contents before being moved to the cage for return down the shaft to the mine working or gallery.
  • the cars In order to maintain a regular flow of cars from the cage, through the tippler, and back to the cage it is preferred to arrange that the cars shall be moved in a continuous stream, or closed circuit, so that no time is lost through reversal of the cars or through lateral transfer devices. It is thus preferred that the tracks upon which the mine cars are moved at the surface be laid in the form of substantially a loop having straight sides joined by rounded ends; the mine cage being raised into one of the straight sides and the tippler being located in the other straight side.
  • the straight sides may be as long as is desired, and turntables, of which there is one at each end of the straight sides, join these sides together in the form of an arcuate trackway at each end of the loop.
  • each shaft head There may be two such closed-circuit tracks at each shaft head; each having a pit cage and tippler associated with it in such a sense that the closed circuit in one set of tracks runs counter-clockwise and the other runs clockwise.
  • each mine car requires to be inspected and may require repairs or other structural maintenance, but to do this whilst the car was still in circuit would be dangerous unless the whole circuit was stopped, thereby leading to a loss of working time.
  • Suitable switch points could be inserted in one of the straight sides of the circuit, preferably between the tippler and the cage. This, however, would lead to the duplication of tracks adjacent the shaft head and tippler, Where lateral space is normally limited.
  • a further object of the invention is to provide a closed circuit track system incorporating such means.
  • means for facilitating the introduction, or removal, of vehicles to or from a closed-circuit track system comprises a switch arm secured to and pivotable in a peripheral guide rail on said turntable and adapted to be moved in a horizontal plane between a position wherein said switch arm comprises an arcuate continuation of the inner periphery of said guide rail and a position wherein said switch arm comprises a continuation of a substantially-straight track portion crossing said turntable on a chord thereof.
  • a closed-circuit track system comprises a pair of substantially-parallel track sections, a pair of linearly-spaced turntables interposed in, and connecting together, said parallel track sections, means secured to or adjacent, at least one end of each track section and adapted to be moved between one position wherein a portion of the means defines a substantially-linear continuation of one rail of the associated track section and a second position wherein a portion of said means comprises an arcuate continuation of a peripheral guide rail of the associated turntable.
  • a switch arm in a turntable for a railed track system, comprises a plurality of sections each pivotally connected together for limited relative movement in a horizontal plane, each section comprising an elongated member having one linearly-concave vertical side and one vertical straight side, the limited relative movement between said sections in one horizontal direction being such as to permit said concave sides to cooperate to form an arc of substantially constant radius and the limited relative movement in the other horizontal direction being such as to permit the straight sides to cooperate to define a substantially straight side throughout the length of said switch arm.
  • FIGURE 1 is a top plan view of a track system and a pair of complementary turntables incorporating the invention
  • FIGURE 2 is a section on the line 22 of FIGURE 1,
  • FIGURE 3 is a section on the line 3-3 of FIGURE 1,
  • FIGURE 4 is a section on the line 4-4 of FIGURE 1,
  • FIGURE 5 is a plan similar to FIGURE 1 with the decking plate and rails of the turntable removed and a portion of the underplate broken away,
  • FIGURE 6 is a vertical longitudinal section of a switch arm
  • FIGURE 7 is a bottom plan view of the switch arm of FIGURE 6, and
  • FIGURE 8 is a section taken on line 8-8 of FIGURE 7 showing a detail thereof.
  • the system consists of two parallel two-rail tracks 2 and 3, the inner rails 4- and 5 of which are laterally separated by a distance substantially equivalant to twice the gauge of the track.
  • One of the tracks is aligned with a track in the mine cage and the other track is aligned with the track within a tippler so that when the rail tracks in the mine cage and the tippler are in their respective correct positions, cars from the cage and the tippler may be fed on to the respective parallel tracks 2 and 3 and vice versa.
  • the system consists of two parallel two-rail tracks 2 and 3, the inner rails 4- and 5 of which are laterally separated by a distance substantially equivalant to twice the gauge of the track.
  • One of the tracks is aligned with a track in the mine cage and the other track is aligned with the track within a tippler so that when the rail tracks in the mine cage and the tippler are in their respective correct positions, cars from the cage and the tippler may be fed on to the respective parallel tracks 2 and 3 and
  • a '3 tracks 2 and 3 are repeated a second tippler interposed therein.
  • a pair of complementary turntables 6 and 6 is located between the two tracks 2 and 3 at a suitable distance on the exit and approach sides of the mine cage and tippler and these turntables serve to move the cars through the lateral space between the adjacent tracks 2 and 3 and, at the'same time, to keep the cars orientated in the same aspect relative to their normal direction of travel.
  • turntables are of identical construction and their elements are designated by similar reference characters.
  • either of the tracks 2 or 3 may be the approach track, depending upon the relationship of the turntables to the cage and tippler.
  • Each turntable 6, 6 has a diameter substantially equal to therdistance between the outer rails 7 and 8 of the tracks 2 and 3 and it comprises a circular flat metal plate 9 having a smooth upper surface.
  • the plate 9 is rotatable in a horizontal plane about a vertical spindle 10 and is supported from beneath by a plurality of rollers 12 ar ranged in a circle beneath the plate on a diameter substantially equal to the distance between the centres of the adjacent tracks 2 and 3.
  • a motor 11 is located beneath the plate 9 and is connected through a speed-reducing gearbox 13 to drive a twin sprocket 12
  • the plate 9 has a drum 14 secured concentrically thereof and depending downwards therefrom, and two endless roller chains 15 are secured around the periphery of the drum 14 in such a position that the respective chains are each engaged by the teeth of the respective sprockets of the twin pair 12 thereof.
  • rotation of the motor 11 and sprocket 12 will rotate the plate 9.
  • the plate 9 is arranged to be rotated from the approach track towards the exit track and whether this rotation is clockvtu'se or counter-clockwise will depend upon the direction of travel of the cars from the cage to the tippler.
  • the guide rail 16 secured to a fixed framework 19 by brackets 20, is of channel section having its channels directed radially-outwards of the turntable so that its web 21 is directed inwardly towards the plate 9.
  • the guide rail 16 is curved to the arc of the periphery of the plate 9 and has a wearing strip 22 secured detachably to its inner vertical surface.
  • the inner guiderail 17 is similarly of channel section curved to the arc of a fixed plate 23 which is secured to a fixed base frame 24 and extends past the spindle 10 from between the tracks 2 and 3 towards the guide rail 16.
  • the inner guide rail 17 lies above the surface of the plate 9 substantially midway between the spindle 10 and the outer periphery of the plate 9 so that the radial distance between the guide rails 16 and 17 is somewhat greater than the gauge of the rails 4 and 7 or 5 and 8; thus enabling the cars to be passed around the turntable in a tighter curve than would be possible if the wheels remained on the rails.
  • the guide rail 17 has a wearing strip 25 attached to its outer periphery.
  • the cars are normally moved on to the turntable by the action of the loading and unloading rams at the cage or tippler, as the case may be, in the normal way, i.e. full cars from the cage are ejected by a corresponding number of empty cars being pushed into the cage by the in the opposite sense and have cage-loading ram or rams, or empty cars are ejected from the tippler by full cars being pushed theremto by the tippler loading ram or rams.
  • transition means are provided, at substantially diametrically-opposite sides of the plate 9, in association with the guide rails 16 and 17.
  • the outer rails 7 and 8 of the opposite tracks 2 and 3 are discontinued slightly short of the periphery of the plate 9 on opposite ends of a chord of said plate, and the space between ends of the rails is bridged by a fixed guide rail 26 which comprises an angle iron having one web vertical and the other web 27 directed horizontally inwards towards the axis of the plate 9.
  • the upper surface of the web 27 lies above the level of the plate 9 but below the level of the upper surface of the rails 7 and 8.
  • a plate 28 is secured to the upper surface of the web 27 and is of such vertical depth that its upper surface lies level with the surface of the rails 7 and 8, at its end adjacent the rails; If desired the plate 28 may be slightly tapered away from the rail ends so that the car wheels are raised or lowered gradually from the level of the plate 9 to that of the rails or vice versa.
  • angle-members 29 are secured to the guide rail 17, these angle members also having plates 28 secured thereto.
  • the angle members 26 and 29 are not parallel, the members 29 diverging inwardly towards the axis of the plate 9 to provide the additional width of separation of the guide rails 16, 17, around the turntable.
  • Cars pushed ofi the ends of the tracks 2 or 3 on to the rotating plate 9 thus leave the rails and are lowered until their wheel flanges rest on the plate 9 which carries them around the turntable until their wheels engage the plates 28 and they are guided on to the rails on the exit side of the turntable.
  • those rails on the approach side may be laid slightly higher than those on the exit side so that there is a slight down grade on to the turntable and also a slight downgrade oif the turntable.
  • the tracks 2 and 3 are continued on the opposite side of the turntable, on substantially diametrically-opposite chords thereof, and switching means are provided whereby the cars may be moved across either chord instead of around the turntable.
  • switching means could be used at each end of the circuit, but it is preferable to have both the exit and inlet switches on the same turntable or, if desired, onboth turntables.
  • each switching means comprises a switch arm 30 comprising three articulated sections 31, 32 and 33 pivoted together for limited independent movement in a horizontal plane about pins 34 and 35.
  • the adjacent ends of the sections 31 and 32 are so formed that when the two sections are occupying the position shown in FIGURE 7, so that their outer edges 36 and 37 are in a substantially straight line'(as shown in their broken-line position in FIGURE 1), a gap 38 is formed between their ends on the opposite side of the pin 34.
  • a gap 39 is formed between the adjacent ends of the sections 32 and 33 on the opposite side of the pin 35 from the edges 37, of those sections.
  • the edge 40 does not form a continuation of the straight line of the edges 36, 37 but, as shown in FIGURE 1, tapers slightly radially-inwardly of the plate 9 to coincide with the adjacent end of the guide rail 29.
  • the opposite edges 41, 42 and 43, respectively, of the switch arms 30 are each concavely arcuate so that when, as shown in the full line positions in FIGURE 1, the arms 30 are in their outward positions, the spaces 33, 39, are moved to the opposite sides of the pins 34, 35 and the edges 41, 42 and 43 then co-operate to define a continuation of the arc of the guide rail 16 and of the periphery of the plate 9.
  • a roller 44 is journalled in the sec tion 32 in such relation thereto that when the arm 3% is in its broken line, or inner, position, the roller axis intersects the axis of the vertical spindle 10.
  • a web 45 extends horizontally outwards from the wall 36 and when the arms 30 lie in the broken line positions of FIGURE 1, these plates form guide plates similar to the guides 29 of the inner rails 4 and 5 on the opposite ends of the chords of the turntable and guide the inner side wheels of the cars back from the plate 9 on to the rails 4 or 5.
  • the switch arms 30 are rotatable in a horizontal plane on a pivot pin 46 which is journalled in a boss 47 secured by a bracket 48, to the fixed frame 19.
  • the section 31 of the arm 30 is secured to the upper end of the pin 46 above the boss 47 and a lever arm 49 is secured to its lower end.
  • the lever arm 49 is pivoted between eyes at the end of the piston rod 50 of a piston and cylinder mechanism 51, the cylinder 52 of which is pivoted at its longitudinal centre on vertical pivots 53 in a frame 54 secured to the turntable base plate 55.
  • Projection of the piston rod 50 from the cylinder 52 causes the associated switch arm 30 to be moved from its outer peripheral position to its position where it extends across the path of the plate 9 with its inner edges 36, '37, 40 substantially in line with the rails 4 or 5.
  • Reverse operation of the piston and cylinder device 51 causes the switch arm 39 to be swung radially-outwards of the plate 9 so that its inner faces 41, 42, 4-3, come into arcuate alignment with the inner surface of the guide rail 16.
  • the plate 9 In the normal operation of the turntable, the plate 9 is caused to rotate by energisation of the motor 11 which through the reduction gearbox 13, rotates the twin sprocket 12.
  • the teeth of the twin sprocket 12 engage the roller chains 15, which are secured around the drum '14, and the drum is caused to rotate, also rotating the plate 9, to which the drum is secured.
  • the drum 14 and plate 9 are rotated in either direction, which depends upon the relationship between the shaft head and the tippler. Assuming that the shaft head lies on the track 3 and the tippler on the track 4, the plate 9 will be rotated clockwise as shown in FIGURE '1.
  • the movement carries the leading car or cars from the rails 35 on the right of FIGURE 1 on to the plates 28 on the guide plates 26 and 29.
  • the wheels move along the plates 28 they are gradually lowered down towards the plate 9, by the taper on the plates 28, until their rim flanges rest upon the rotating plate 9.
  • the plate 9 then carries them around in an arc, the car wheels skidding on the smoth surface of the plate 9 until they reach the guide plates 26, 29 at the end of the rails 4 and 7, where they are guided on to these rails, which may be laid with a slight down grade at their end nearest to the turntable to assist them to mount these rails.
  • track 2 may be the approach track and track 3 the exit track.
  • a closed circuit track system comprising a pair of substantially parallel tracks, each comprising a pair of rails, a turntable connecting said pair of tracks intermediate their ends, a peripheral guide rail about said turntable between said tracks, a switch arm pivoted at the junction of the inner track of each rail and said peripheral guide rail to swing in one direction to a chordwise position relative to said turntable with one side aligned with the inner rail of its track and in the opposite direction to an arcuate position with the other side conforming to the periphery of said turntable between said tracks.
  • said switch arm comprises an articulated member having a plurality of sections pivoted together for limited relative movement therebetween in a horizontal plane, each said section comprising one concave vertical edge and one straight vertical edge whereby, upon said relative movement therebetween in one direction, said concave edges are adapted to co-operate to define an arc of the curvature of said peripheral guide rail and, upon said relative movement in the other direction, said straight vertical edges are adapted to co-operate to define a substantially-linear continuation of said substantially-straight track portion.
  • peripheral guide rail and said switch arm cooperate to define a peripheral guide rail extending around substantially half the periphery of said turntable when said switch arm has been moved in said one direction.
  • said turntable comprises a smooth-surfaced disc-like member rotatable about a vertical axis and having its peripheral edge substantially co-extensive with, and beneath, the radially-inner arcuate surface of said peripheral guide rail, means to rotate said disc-like member, and an inner guide rail substantially concentric with said peripheral guide rail and defining therewith a semicircular trackway on said disc-like member, said semicircular trackway having a radial width in excess of the width between the rails of said track portion.
  • said substantially-straight track portion comprises two linear sections each comprising two parallel rails, the outer ones of which lie tangentially and longitudinally-spaced from opposite ends of a chord of said turntable, a longitudinal member disposed between adjacent ends of said outer rails below the upper surface or" said outer rails and a longitudinal member spaced between the end of one inner guide rail and the inner guide rail of said turntable and below the upper surfaces of said inner rails, and means on that end of each said longitudinal member which lies adjacent the inner and outer rails adapted to lower the wheels of a mine car from said rails to the surface of said disc-like member as said car is moved from said rails on to said disc-like member.
  • the means to rotate said disc-like member comprise a cylindrical drum secured co-aXially to said disclike member and depending therefrom, a roller chain secured around the periphery of said drum, and a prime mover adapted to cause the rotation of a chain sprocket the teeth of which are engaged with said chain between the rollers thereof.
  • each said switch arm being adapted, in said one position thereof, to form an arcuate continuation of said peripheral guide rail, being pivotable in opposite ends thereof and being directed in opposite senses relative thereto and each said switch arm being adapted to be moved independently between the two alternative positions thereof.
  • a closed-circuit track system comprising a pair of spaced-apart substantially-parallel track sections each comprising a pair of parallel rails, a pair of linearlyspaced turntables interposed in, and connecting together, said parallel track sections, an outer peripheral guide plate above each said turntable beyond said track sections, switch means secured adjacent at least one end of each track section and adapted to be moved between one position wherein a portion of the switch means defines a substantially-linear continuation of one rail of the associated track section and a second position wherein a portion of said switch means comprises an arcuate continuation of a peripheral guide rail of the associated turntable.
  • said articulated switch means comprises an articulated switch arm pivoted at or adjacent an end of said peripheral guide rail and having means adapted to move it between said one position and said second position thereof, the articulated switch arm comprising a plurality of sections each pivoted together for relative restricted movement therebetween, the vertical edges of the sections on one side of said articulated switch arm being longitudinally concave and the vertical edges of the sections on the other side thereof being substantially-straight, whereby upon relative movement between said sections in one direction one edge of the articulated switch arm is adapted to de fine an arc of substantially the same radius as that of the peripheral guide-rail, and upon relative movement between said sections in the other direction the opposite edge of the switch arm is adapted to define a substantiallylinear continuation of one rail of one of said track sections.
  • a track system according to claim 12, wherein said turntables each comprise a rail-less rotatable disc having a smooth upper surface, an inner guide rail above said disc and terminating adjacent the inner rails of said track sections, means associated with said peripheral guide rail disposed above the surface of said disc for guiding wheels of a mine car vertically between the surface of the rails of said track system and the surface of said disc and for guiding the mine car through the path defined on said rotatable disc by said guide rails, said articulated switch arms being operable alternatively to cooperate with said peripheral guide rail to confine said mine car to the path on said rotatable disc or to divert said car from said path to a second path across a chord of said disc.
  • a switch arm comprising a plurality of sections each pivotally connected together for limited relative movemeat in a horizontal plane, each section comprising an elongated member having one linearly-concave vertical side and one vertical straight side, the limited relative movement between said sections in one horizontal direction being such as to permit said concave sides to co operate to form an arc of substantially-constant radius and the limited relative movement in the other horizontal direction being such as to permit the straight sides to cooperateto define a substantially-straight side throughout the length of said articulated switch arm.

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  • Transportation (AREA)
  • Mechanical Engineering (AREA)
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US17378A 1959-04-29 1960-03-24 Turntables Expired - Lifetime US3060865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14644/59A GB877187A (en) 1959-04-29 1959-04-29 Improvements in and relating to turntables

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US3060865A true US3060865A (en) 1962-10-30

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US17378A Expired - Lifetime US3060865A (en) 1959-04-29 1960-03-24 Turntables

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BE (1) BE589343A (de)
DE (1) DE1205129B (de)
GB (1) GB877187A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603262A (en) * 1969-06-06 1971-09-07 Bjorn Sture Wiklund Track system for wheeled carriages
US3888184A (en) * 1973-06-27 1975-06-10 Mitsui Shipbuilding Eng Turntable
US3898935A (en) * 1974-01-28 1975-08-12 Rexnord Inc Car turner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US881000A (en) * 1907-10-03 1908-03-03 Stephen E Jackman Switch for pleasure-railways.
US1353918A (en) * 1920-02-28 1920-09-28 Hyla F Maynes Speedway amusement device
US1819017A (en) * 1929-06-29 1931-08-18 Libbey Owens Ford Glass Co System for grinding and polishing glass sheets
GB776667A (en) * 1954-05-31 1957-06-12 Qualter Hall & Company Sales L Improvements in colliery turntables

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE520464C (de) * 1930-04-01 1931-03-11 Wilhelm Kenter Verfahren zum Umgleisen von Schienenfahrzeugen
DE535259C (de) * 1930-06-04 1931-10-08 Bhs Bayerische Berg Mit einem Mischer fuer Strassenbaustoff verbundene, auf Gleisen laufende Drehscheibefuer Muldenkipper
DE1052442B (de) * 1957-05-31 1959-03-12 Qualter Hall & Company Sales L Drehscheibe fuer den Grubenbetrieb

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US881000A (en) * 1907-10-03 1908-03-03 Stephen E Jackman Switch for pleasure-railways.
US1353918A (en) * 1920-02-28 1920-09-28 Hyla F Maynes Speedway amusement device
US1819017A (en) * 1929-06-29 1931-08-18 Libbey Owens Ford Glass Co System for grinding and polishing glass sheets
GB776667A (en) * 1954-05-31 1957-06-12 Qualter Hall & Company Sales L Improvements in colliery turntables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603262A (en) * 1969-06-06 1971-09-07 Bjorn Sture Wiklund Track system for wheeled carriages
US3888184A (en) * 1973-06-27 1975-06-10 Mitsui Shipbuilding Eng Turntable
US3898935A (en) * 1974-01-28 1975-08-12 Rexnord Inc Car turner

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Publication number Publication date
DE1205129B (de) 1965-11-18
GB877187A (en) 1961-09-13
BE589343A (fr) 1960-08-01

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