GB2277497A - Bimodal access platform - Google Patents
Bimodal access platform Download PDFInfo
- Publication number
- GB2277497A GB2277497A GB9408343A GB9408343A GB2277497A GB 2277497 A GB2277497 A GB 2277497A GB 9408343 A GB9408343 A GB 9408343A GB 9408343 A GB9408343 A GB 9408343A GB 2277497 A GB2277497 A GB 2277497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- access platform
- wheels
- chassis
- flanged
- platform
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/044—Working platforms suspended from booms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
- B60F1/00—Vehicles for use both on rail and on road; Conversions therefor
- B60F1/02—Vehicles for use both on rail and on road; Conversions therefor with rail and road wheels on the same axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D15/00—Other railway vehicles, e.g. scaffold cars; Adaptations of vehicles for use on railways
Abstract
An automotive access platform comprises a chassis (1) supported by a plurality of wheels (2) that forms a stable base, a turret (3) mounted on the chassis, and an articulated boom (4) that is mounted on the chassis and supports an access platform (5) for personnel. The wheels (2) are in the form of flanged wheels (6) that allow the access platform to travel along railway track, each wheel having a tyre of larger radius than that of the flanged wheel coaxially and detachably mounted thereon to enable the access platform to travel over terrain other than railway track. <IMAGE>
Description
ACCESS PLATFORM
This invention relates to hydraulically actuated access platforms.
The present invention provides an automotive access platform, which comprises a chassis supported by a plurality of wheels that form a stable base, a turret mounted on the chassis, and an articulated boom that is mounted on the turret and supports a platform for personnel, wherein the wheels are in the form of flanged wheels that allow the access platform to travel along railway track, each wheel having a tyre of larger radius than that of the flanged wheel coaxially and detachably mounted thereon to enable the access platform to travel over terrain other than railway track.
The access platform according to the invention has the advantage that it enables fast and easy access to all types of construction in the region of railway track, for example to buildings, tunnel walls and roofs, bridges, overhead electrified power lines and support constructions and the like for installation, inspection, repair and maintenance thereof. The use of the access platform according to the invention also enables such installation, inspection, repair and maintenance work to be conducted with a greater degree of safety and/or with fewer personnel than currently employed methods that involve the use of ladders etc. The access platform also has the advantage that it can be positioned on, and removed from, railway track very easily.All that need be done to position the access platform on the track is to drive the platform to an area such as a level crossing in which the ground surface is at about the same height as the top of the rails, or if no such area is convenient, to form one for example by placing sleepers or other objects in the vicinity of the rails, and, once the flanged wheels are in alignment with the rails, simply driving the access platform onto the rails.
The tyres of the wheels are, as stated above, of larger radius than that of the flanged wheels, in order to enable the access platform to be driven over terrain other than railway track, such as earth or tarmacadamed surfaces. Preferably the radius of the tyres is only slightly larger than that of the flanged wheels, -e.g. in the range of from 5cm to 20cm larger, in order that the access platform may be driven along the railway track without the tyres touching the rails, sleepers, blocks, fastenings etc. Of course, it will be necessary to remove the tyres, or at least a pair of tyres, if it is intended to drive the access platform over a turn-out or crossing in the track, but the ability to drive the access platform onto the track with the tyres still mounted enables the tyres to be removed without the necessity to jack the access platform.
The access platform is preferably one which, when not being driven along track, is manoeuvrable by means of a steering mechanism, in which case it is preferably provided with an arrangement for preventing steering thereof when desired, in order to remove temporarily or reduce the possibility of accidentally causing the wheels to move out of their correct orientation when the access platform is located on the railway track.
The access platform is preferably also one in which the stability thereof during operation is provided solely by the wheelbase thereof, that is to say, which does not require outrigger legs or other supports to be positioned on the ground before although such forms of access platform can be extremely fast and easy to use, they may require a level surface for full deployment of the boom. In this case it may be desirable to incorporate a detector for detecting the tilt of the chassis, and, if necessary restricting the deployment of the boom depending on the degree of tilt. For example, in U.K., the cant on railway track will not normally be more than 75mm, but may be as high as 150mm. It may in these circumstances, be desirable for the detector to limit full deployment of the boom when the access platform is located on track having a cant of, say, greater than 70 or lOOmm.It has been observed that the -stability of the access platform according to the invention can be significantly greater than that of a platform that is substantially identical but which has only wheels provided with pneumatic tyres, nothwithstanding the fact that the wheelbase of the access platform according to the invention is narrower (as far as the flanged wheels are concerned) in order to fit standard gauge railway track. The increase in stability appears to be due partly to the mass added to the access platform in the form of the flanged wheels (in the region of 450kg) and partly due to the reduced degree of rocking of the access platform allowed by the flanged wheels because of their lack of deformation as compared with pneumatic tyres.
One form of access platform according to the present invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 is a perspective view of an access platform
according to the invention;
Figure 2 is a perspective view showing the chassis of
the access platform of figure 1 in greater
detail; and
Figure 3 is a schematic section through one of the
wheels of the access platform.
Referring to the accompanying drawings, an access platform comprises a chassis 1 that is supported by four wheels 2 provided with pneumatic tyres. The chassis supports a turret 3 that is rotatably mounted in a vertical axis and which itself supports an articulated boom 4 having a platform 5 for personnel at its end. As well as housing the motor, hydraulic pump etc for the access platform, the turret provides a counterweight for the boom. This general type of access platform is commercially available for example from Genie Industries of Redmond, Washington, U.S.A.
The access platform has been modified by providing it with four flanged wheels 6 on to which the pneumatic wheels 2 are detachably mounted thereon, in a conventional manner by means of bolts 7. As can be seen, the pneumatic tyres are of slightly larger radius than the flanged wheels in order to enable the access platform to be driven over rough or metalled terrain, but are of sufficiently small radius, compared with the flanged rail wheels, that the access platform can be driven along railway track without the need to remove the pneumatic tyres.
In view of the fact that the axial separation of two of the wheels of the conventional access platform employed was slightly too great for standard 1.435m gauge track, one pair of flanged wheels 6 were formed as shown in figure 3 having their rim portion 10 axially offset from their central portion 11 and connected by a short cylindrical connection part 12.
In order to locate the access platform on the track, it is simply driven on to raised area whose surface is level with the top of the rails, and, after having been correctly aligned, is simply driven on to the rails. Before or after driving on to the rails, the steering of the access platform is locked, for example by fixing a clamp (not shown) on to the tracking rod connecting the wheels.
Claims (5)
1. An automotive access platform which comprises a
chassis supported by a plurality of wheels that
forms a stable base, a turret mounted on the
chassis, and an articulated boom that is mounted
on the turret and supports a platform for
personnel, wherein the wheels are in the form of
flanged wheels that allow the access platform to
travel along railway track each wheel having a
tyre of larger radius than that of the flanged
wheel coaxially and detachably mounted thereon to
enable the access platform to travel over terrain
other than railway track.
2. An access platform as claimed in claim 1, wherein
the radius of the tyres is in the range of from 5
to 20cm larger than the radius of the flanged
wheels.
3. An access platform as claimed in claim 1 or claim
2, which includes a steering mechanism and
provided with an arrangement for preventing
steering thereof when desired.
4. An access platform as claimed in any one of claims
1 to 3, whose stability is provided solely by the
wheelbase thereof.
5. An access platform substantially as hereinbefore
described with respect to, and as shown in, the
accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB939308688A GB9308688D0 (en) | 1993-04-27 | 1993-04-27 | Access platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9408343D0 GB9408343D0 (en) | 1994-06-15 |
| GB2277497A true GB2277497A (en) | 1994-11-02 |
Family
ID=10734551
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB939308688A Pending GB9308688D0 (en) | 1993-04-27 | 1993-04-27 | Access platform |
| GB9408343A Withdrawn GB2277497A (en) | 1993-04-27 | 1994-04-27 | Bimodal access platform |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB939308688A Pending GB9308688D0 (en) | 1993-04-27 | 1993-04-27 | Access platform |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9308688D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0878395A3 (en) * | 1997-05-16 | 1999-11-10 | Jervis B. Webb International Company | Dual mode cargo transport apparatus and method of using same |
| ITMI20091631A1 (en) * | 2009-09-24 | 2011-03-25 | Rema Engineering S R L | TROLLEY-RAILWAY STAIRCASE WITH MOBILE PLATFORM FOR THE CONSTRUCTION AND MAINTENANCE OF RAILWAY LINES |
| DE202016006633U1 (en) * | 2016-10-27 | 2018-02-02 | Kuka Roboter Gmbh | Mobile manipulator system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1132263A (en) * | 1965-01-22 | 1968-10-30 | Ct D Etudes Et D Applic Des Te | Improvements in or relating to load transporting trucks and installations appertaining thereto |
| GB1520635A (en) * | 1975-10-03 | 1978-08-09 | Armfield Eng Ltd | Inspection vehicle |
| US4708066A (en) * | 1985-12-27 | 1987-11-24 | Little Giant Crane And Shovel, Inc. | Combination rail and highway vehicle |
-
1993
- 1993-04-27 GB GB939308688A patent/GB9308688D0/en active Pending
-
1994
- 1994-04-27 GB GB9408343A patent/GB2277497A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1132263A (en) * | 1965-01-22 | 1968-10-30 | Ct D Etudes Et D Applic Des Te | Improvements in or relating to load transporting trucks and installations appertaining thereto |
| GB1520635A (en) * | 1975-10-03 | 1978-08-09 | Armfield Eng Ltd | Inspection vehicle |
| US4708066A (en) * | 1985-12-27 | 1987-11-24 | Little Giant Crane And Shovel, Inc. | Combination rail and highway vehicle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0878395A3 (en) * | 1997-05-16 | 1999-11-10 | Jervis B. Webb International Company | Dual mode cargo transport apparatus and method of using same |
| US6129026A (en) * | 1997-05-16 | 2000-10-10 | Jervis B. Webb Company | Dual mode cargo transport apparatus and method of using same |
| ITMI20091631A1 (en) * | 2009-09-24 | 2011-03-25 | Rema Engineering S R L | TROLLEY-RAILWAY STAIRCASE WITH MOBILE PLATFORM FOR THE CONSTRUCTION AND MAINTENANCE OF RAILWAY LINES |
| WO2011036642A1 (en) * | 2009-09-24 | 2011-03-31 | Remazel Engineering S.P.A. | Railway work-vehicle with mobile work platform for the construction and maintenance of railway overhead power lines |
| DE202016006633U1 (en) * | 2016-10-27 | 2018-02-02 | Kuka Roboter Gmbh | Mobile manipulator system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9308688D0 (en) | 1993-06-09 |
| GB9408343D0 (en) | 1994-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |