EP2039648B1

EP2039648B1 - Material handling means

Info

Publication number: EP2039648B1
Application number: EP07253764A
Authority: EP
Inventors: Paul Cummings
Original assignee: Blue Sky Access Ltd
Current assignee: Blue Sky Access Ltd
Priority date: 2007-09-22
Filing date: 2007-09-22
Publication date: 2012-11-14
Anticipated expiration: 2027-09-22
Also published as: EP2039648A1

Description

Field

This invention relates to material handling means and in particular to means used for lifting or supporting lengths of materials such as pipes or tubes during the construction of buildings.

Background of the Invention

Building construction sites for large buildings frequently employ construction equipment for lifting large and heavy components into position during the construction of a building. For example, lengths of standard 8 inch ( 200mm) diameter steel pipe are typically 6 meters in length and may weigh in the order of 150 kgs. During construction of commercial building the overhead pipework is typically fixed into position using a pair of spaced apart aerial lifts working in synchronisation with the pipe being finally lifted and manoeuvred into position manually.
A typical aerial lift is a mobile scissor lift available from JLG Ind. and which has a work platform which may be lifted into the air by a hydraulically operable scissor mechanism. For safety the work platform is surrounded by a safety barrier or fence.
These lifts may be provided with auxiliary material handling equipment which is secured to the platform for manoeuvring lengths of pipe into location within a building. An example of such equipment is described in GB 2398556A and in PCT patent application WO 2005/077711 .
The present invention is also concerned with auxiliary material handling equipment for lifting and locating lengths of materials, such as pipes or tubes, into position during building construction and which when utilised on a standard lift platform provides for improved access.

Statements of Invention

According to a first aspect of the present invention there is provided material handing means comprising a pair of spaced apart material supports, each material support comprising a body, a first roller mounted on the supporting body with its axis of rotation inclined to the horizontal, and a second roller also mounted on the body and extending upwardly of the body and which is adjacent the lower end of the first roller, characterised in that the first roller is mounted at both end on the supporting body and the first roller at least on one support is a power roller rotated by a suitable motor.
The first roller may be a powered roller rotated, by for example, a hydraulic motor or an electric motor. The first roller may be covered by a non-slip polymeric layer on which the material rests. The first roller may be inclined at up to 30° of arc from the horizontal and preferably is inclined at between 5-15° of arc.
Preferably the axis of rotation of the second roller is substantially vertical and the second roller is off-set to one side of the first roller.
The material support may further comprise a rowlock mounted on the body via a substantially vertical leg, the rowlock being rotatable about a vertical axis. Preferably the rowlock comprises a pair of rollers in a V formation substantially a right angles to each other. The rowlock may further comprise an arm extending radially outwardly from the rowlock (that is radially with respect to the axis of rotation of the rowlock) and having at its distal end a retaining hook opening downwards. Preferably the retaining hook comprise an S or Z shaped hoop, one side opening downwardly and the other side opening upwardly.
Preferably each support is mounted on a respective displacement means. Each displacement means may comprise an actuator and slide means mounted on fixed base. The body of each support is preferably slidably mounted on a respective slide means which may comprise a pair of substantially parallel slides, and the respective actuator, preferably a hydraulic actuator, is operable to move the body relative to the slide means to displace the material support relative to the fixed base.
The material handling means may further include a plurality of jacks, for lifting the material supports. Preferably each support is mounted on a pair of jacks. Each jack comprises an upright ram which is secured to the supporting body and may be operated by any suitable means, for example the ram may be displaced by mechanical means such as a pawl and ratchet mechanism, or screw threaded drive means, and is preferably a hydraulic jack. The jacks may be interconnected so that they are raised and lowered in unison.
The material handling means may be used in combination with an aerial lift having a work platform surrounded by a safety barrier, the jacks in use resting on the platform with coupling means securing the jack to said barrier. Suitable coupling means is disclosed the applicants co-pending GB Patent application GB2439301A .
The material handling means may further include a hydraulic control means to which the hydraulic actuators and hydraulic jacks are connected.
The aerial lift is preferably a mobile self drive lift having a platform which is raised by a powered hydraulic system, wherein said hydraulic control means are connected into the powered hydraulic system of the lift.

Description of the Drawings

The invention will be described by way of example and with reference to the accompanying drawings in which:-

Fig. 1: is a side elevation of an aerial lift in a lowered condition and provided with material handling means according to the present invention,
Fig. 2: is an end view of the aerial lift shown in Fig.1 with the material handling means in a raised condition with a large diameter pipe thereon.
Fig. 3: is an end view of the aerial lift shown in
Fig. 4: is a plan view of the body and slide means with other components omitted for the sake of clarity,
Fig. 5: is a section through the slide means of Fig 4 taken on the line V-V
Fig. 6: is a side elevation of the rowlock used with the pipe support in Fig 3 and
Fig. 7: is a front elevation of the rowlock shown in Fig 6.

Detailed Description of the Invention

With reference to Figs 1 the drawings, there is shown an aerial lift 10 in the form of a self drive mobile scissor lift available from JLG Ind.. The lift 10 has a drivable vehicle body 11 having wheels 15 and a work platform 12 located on its body and which in use can be raised or lowered relative to the ground. The platform 12 is shown in a lowered condition. The vehicle body is provided with stabilisers 16 at its corners which are lowered to provide stability during use of the lift. The work platform 12 is raised or lowered by a scissor type mechanism 13 typically operated by a powered hydraulic system provided on the lift 10. The hydraulic system is provided with a manifold 14 whereby hydraulic power may be taken from the powered system of the lift and used to operate material handling means 30 of the present invention. The platform 12 may have extendable end portions 19 and the whole platform is provided with a safety barrier 17 formed from rails and a kick plate. An access ladder 18 is provided on the body 11 for access to the platform 12 when in the lowered condition.
The aerial lift 10 is provided with material handing means 30 comprising two spaced apart material handling apparatus 30A and 30B located one adjacent each extendable end portion 19 and which is shown in Figs. 1 & 2 in raised conditions. In the present embodiment, the material handling means 30 is for use in handling lengths of pipe 70, large diameter pipe 70A (250mm) as shown in Fig. 2 or a plurality of lengths of smaller diameter pipe 70B(38mm) as shown in Fig 3.
With reference now to Fig.2, and Fig.3, the two apparatus 30A & 30B are substantially similar and therefore only the handling apparatus 30A will be described in detail. The apparatus 30A includes a material support 33 mounted on a displacement means 47,48, 51 having a fixed base 31 in turn mounted on a pair of upright jacks 32. Each jack 32 is substantially vertical and comprises a jack body 35 having a reciprocable ram 34 telescopically mounted within the body 35. Each jack body 35 has a foot 36 that rests on the platform 12 and the head of the ram 34 is provided with an adaptor plate 37 to which the base 31 is attached. The jacks 32 are hydraulically operable for movement of the rams into and out of the respective bodies.
One of the two jacks 32 is located adjacent the barrier 17 and is secured to the inside of the barrier rail 17 by means 40 disclosed in the applicants co-pending GB Patent application GB2439301A .
The hydraulic jacks 32 are operated in unison through an electronic control means 38 fixed to one of the jack bodies 35 and which controls a hydraulic valve block 62. The valve block 62 is connected by flexible hydraulic hose 39 to the manifold 14 for take-off of hydraulic power from the lift hydraulic system. At least one of the electrical control means 38 on the two apparatus 30A & 30B include a radio receiver which receives commands from a remote control hand set 63 for operation of the valves in the valve blocks 62 in accordance with command signals received from the hand set 63. The electrical control means 38 is connectable via a standard plug to the electrical power system of the lift 10.
The material/pipe support 33 comprises a body 42 with a first roller 43 inclined relative to the horizontal and supported at each end thereof on the body 42. A second substantially vertical roller 44 is located at the lower end of the first roller 43 off-set to one side thereof. The first roller 43 may be a powered roller (as shown) driven by a hydraulic motor 45 located at its upper end. In an alternative embodiment shown in Fig. 3 the roller 43A may be a freely rotating roller. The roller 43 is covered in a none-slip elastomeric layer to improve the grip between the driven roller 43 and the pipe 70.
The roller 43 is inclined at up to 30° to the horizontal, preferably between 5-15°. The vertical roller 44 is a freely rotatable roller and is located adjacent the lower end portion of the first roller 43. This ensures that the pipe 70 remains on the two inclined roller in contact with the vertical rollers 44.
Referring also to Figs 4 & 5, the body 42 is slidably mounted on a slide means 46 fixed to the base 31. A plurality of sliders 48 secured to the underside of the body 42 allow for sliding movement along the slide means 46 which comprises a pair of spaced apart substantially parallel longitudinal slideways 47. The body 42 is displaced back and forth along the slideways 47 by an actuator 51 having a rotatable screw-threaded strut 56 which extends substantially parallel with slideways 47 and is supported at its far end by a bearing bracket 52. The motor 55, preferably a hydraulic motor, is connected rotatably fast with the strut 56 through a connector 53. The screw strut 56 is threadedly connected to a screwthread bracket 54 on the body 42 so that rotation of the strut 56 in one direction of the other moves the body 42 relative to the base 31. Limit switches 58(only one of which is shown may be provided at the ends of the slideways 47 for control of the actuator 51.
The hydraulic actuators 51, hydraulic motor 45 and the hydraulic jacks' 32 are connected to the respective valve block 62 and the two hydraulic valve blocks 62 and control means 38 on the two material handling apparatus 30A, 30B are interconnected for operation of the jacks and movement of the material supports 33 so that they are raised or lowered in unison this prevents tipping of the elongate load, in this case pipe 70.
In use the jacks 32 of the two material handling apparatus 30A & 30B are raised or lowered to position the first rollers 43 to a convenient level for accepting a length of material, for example a pipe 70. The pipe 70 is then held in position between the first rollers 43 and the vertical rollers 44. The non-slip layer on the first rollers and their inclination help keep the pipe in position. The pipe 70 may then be lifted proximate the required location on the aerial lift 10. The pipe length may then be manoeuvred into its final position using the jacks 32, actuators 55 and powered rollers 43.
In use, the material handling means 30 is utilised for lifting over small height range for example from the lift platform 12 to a height of up to 2 metres above the platform.
With reference to Figs. 3,6 & 7, there is shown a material handling apparatus 30B which is substantially similar to that shown in Fig 2, with the jacks 32 in a lowered condition. A plurality of smaller diameter (38-40mm) pipes is stored on the first roller 43A. The roller 43A is a non-motorised freely rotating roller.
A rowlock 72 is rotatably mounted on the body 42, conveniently coaxially with the vertical roller 44. The rowlock 70 comprises a pair of rollers 71 in a V formation assembly, substantially at right angle to each other, mounted on a vertical leg 73. The rowlock 70 is capable of rotation about a substantially vertical axis relative to the supporting body 42. The roller assembly may rotate relative to the leg 73, or alternatively, the leg 73 may be rotatably mounted relative to the body. An arm 74 projects radially and horizontally from the leg 73 adjacent the rollers 71. A downwardly facing hook 75 is mounted on the distal end of the arm 74 and preferably a second upwardly facing hook 76 is also provided at the distal end of the arm 74. These two hooks may be conveniently provided by a single S or Z shaped component.
In use, the end portion of a pipe 70B is placed in the rowlock 72 on the two rollers 71 and the pipe may now be easily manually manoeuvred from its other end portion longitudinally on the rollers, or rotationally about the vertical axis or combinations of both. The pipe 70A may be temporarily latched under the downward hook 75 or rested on the upward hook 76 during the manoeuvrings of a length of pipe 70B.

Claims

A material handing means (30) comprising a pair of spaced apart material supports (33), each material support (33) comprising a body (42), a first roller (43) mounted on the supporting body (42) with its axis of rotation inclined to the horizontal, and a second roller (44) also mounted on the body (42) and extending upwardly of the body and which is adjacent the lower end of the first roller (43), characterised in that the first roller (43) is mounted at both ends on the supporting body (42) and the first roller (43) at least on one support (33A) is a power roller rotated by a suitable motor.
A handling means as claimed in Claim 1, wherein the first roller (43) of each support (33) is inclined at up to 30° of arc from the horizontal, preferably at between 5-15° of arc.
A handling means as claimed in Claim 1 or Claim 2, wherein the axis of rotation of the second roller (44) is substantially vertical and the second roller (44)is off-set to one side of the first roller (43).
A handling means as claimed in any one of Claims 1 to 3, wherein at least one support (33) further comprise a rowlock ((72) mounted on the body (42) via a substantially vertical leg (73), the rowlock(72) being rotatable about a substantially vertical axis.
A handling means as claimed in Claim 4, wherein the rowlock (72) comprises a pair of rollers (71) in a V formation substantially a right angles to each other.
A handling means as claimed in Claim 5, wherein the rowlock further comprises an arm (74) extending radially outwardly from the axis of rotation and has at its distal end a retaining hook (75,76).
A material handling means as claimed in any one of Claims 1 to 6, the body (42) of each support (33) being slidably mounted on a respective displacement means (46) comprising slide means mounted on a base (31).
A material handing means as claimed in Claim 7, wherein each respective slide means (46) comprises a pair of substantially parallel slideways (47), and a respective actuator (51)is operable to move the body (42) relative to the slide means (47) to displace the material support (33).
A material handling means as claimed in Claim 7 or Claim 8 and further including a plurality of jacks (32), for lifting the material supports (33), each base (31) being mounted on a pair of hydraulic jacks (32) which are interconnected to a hydraulic control means (38,62) so that they are raised and lowered in unison.
An aerial lift comprising material handling means (30) as claimed in any one of Claims 1 to 9, the aerial lift (10) having a work platform (12) surrounded by a safety barrier (17), with the jacks (32) in use resting on the platform (12) with coupling means (40)securing the jack (32) to said barrier (17). 40
An aerial lift as claimed in Claim 10 being a mobile self drive lift the work platform (12) of which is raised by a powered hydraulic system, wherein said hydraulic control means (38,62) are connected into the powered hydraulic system of the lift.