CA2234531A1 - Adjustable work station - Google Patents
Adjustable work station Download PDFInfo
- Publication number
- CA2234531A1 CA2234531A1 CA 2234531 CA2234531A CA2234531A1 CA 2234531 A1 CA2234531 A1 CA 2234531A1 CA 2234531 CA2234531 CA 2234531 CA 2234531 A CA2234531 A CA 2234531A CA 2234531 A1 CA2234531 A1 CA 2234531A1
- Authority
- CA
- Canada
- Prior art keywords
- platform
- work station
- base
- work
- elevator mechanism
- 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.)
- Abandoned
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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Spray Control Apparatus (AREA)
Abstract
A work system which is well adapted for use in automotive body repair and painting provides an adjustable platform. The platform provides safe footing for spray booth operators (painters) and allows for easier access to higher and hard-to-reach parts of a vehicle. The work system extends completely around the vehicle. The work system comprises a pair of workstations connected by removable telescopic end platforms. The work stations may be elevated or lowered independently and can also be horizontally extended or retracted to allow for wide or narrow based vehicles. The work stations may also be used as stand alone units for providing access to one side of a vehicle. The work stations are each equipped with safety harness anchors, multiple air supply lines and hangers for tools and other accessories. A work system according to the invention promotes a safer and more efficient workplace.
Description
CA 02234~31 1998-04-09 ADJUSTABLE WORK STATION
Field of the Invention This invention relates to a work station for providing an operator with a raised working platform. The invention has particular application to work stations for use in auto body repair and vehicle painting. I'he invention relates particularly to work stations which provide a platform that can be raised and lowered to provide an o operator with a variable height working platform.
Background of the Invention Performing coating processes, exterior repairs or placement of body components and accessories on vehicles requires an operator to have ready access to positions around and about the complete exterior of the vehicle. In order to do these tasks safely and efficiently an operator should have unrestricted access to a vehicle while maint~inin~
balance. This minimi7.es the likelihood that the operator will over extend his reach, trip, fall or lose his footing. Further, the operator should be able to move back and forth along the vehicle in a smooth unimpeded fashion while painting. Otherwise it will be difficult or impossible to apply coatings evenly and the appearance and durability of the final product will suffer. Some kind of an elevated work station is needed to allow upper portions of larger vehicles to be prepared and painted.
' CA 02234~31 1998-04-09 .Automobile painters currently use various systems of ladders, lifts platforms and scaffolding to provide them with easy access to the elevated portions of vehicles. All of these systems suffer from one or more disadvantages. For example, Fabrizi, U.S. Patent No. 5,584,759 5 provides a spray booth having a raised perimetral walkway. A lift is located in a work area inside the walkway. A vehicle or other item to be painted can be placed on the lift and raised to a level which provides an operator st~nrling on the platform with comfortable access to a selected part of the vehicle. The Fabrizi system requires substantial overhead lO clearance to use, is not easily reconfigurable, and is expensive because it includes a lift powerful enough to raise a heavy vehicle.
Fredericks, U.S. Patent 3,997,024 describes an adjustable scaffolding platform which could be used in painting vehicles. An 15 operator must climb a ladder to gain access to the platform. Adjusting the height of the platform is reasonably difficult for a single person to do and cannot be done while a person is on the platform.
Leezer, U.S. patent 5,544,592 describes a folding table for 20 use in spray booths. The surface of the table provides a platform on which an operator can stand. The height of the Leezer table is not easily adjustable and cannot be altered when the table is occupied by an operator. An operator must climb up a ladder to gain access to the table.
:Billington et al., U.S. patent No. 5,217,090 shows an adjustable height work station for use by factory production workers.
' CA 02234~31 1998-04-09 The Billington et al. work station is not adapted for use in painting vehicles and its platform cannot be lowered completely to the ground.
A particular problem in providing systems for use in spray 5 booths is that it is important to maintain air flow patterns within the spray booth which do not interfere with the painting process. Spray booths are designed to avoid harmful air flow patterns. Introducing scaffolding or other structures into a spray booth can ch~nge air flow patterns within the spray booth in an undesirable way.
There remains a need for a versatile, reasonably cost effective work stand which will allow operators to access and work on various aspects of an object, such as a vehicle, with maximum efficiency.
There is a particular need for such a work stand which can be used with 5 good effect in an automotive type spray booth.
Summary of the Invention Accordingly, a first aspect of the invention provides a work 20 station. The work station comprises a base; an elongated platform coupled to the base; and an elevator mech~ni.~m coupled between the base and the platform for controllably raising and lowering the platform relative to the base. The platform is pivotally connected to the elevator mech~ni.~m such that the platform is upwardly pivotally displaceable 25 from a horizontal position. This reduces the possibility that the platform could crush a person or foreign object that gets underneath the platform by allowing the platform to pivot upwardly if the platform is lowered on - CA 02234~31 1998-04-09 top of a person or foreign object. The work station preferably comprises a trolley assembly slidably mounted for longitudinal travel along the platform. I'he trolley assembly bears a controller for operating the elevator mech~ni.qm. The trolley permits the controller to be moved to 5 a convenient location along the platform. The trolley may include a safety harness attachment point.
A second aspect of the invention provides a work station. The work station comprises a base, an elongated platform coupled to the lo base, and an elevator mech~ni.~m coupled between the base and the platform for controllably r~ ing and lowering the platform relative to the base. The elevator mech~ni.~m comprises a lifting device having:
first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to 5 a carrier; second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, a linear actuator connected between the carrier and the second ends of the second and third arms. In a preferred embodiment the linear actuator comprises a 20 pneumatic actuator. Preferably the elevator mech~ni~m comprises first and second lifting devices, with the first lifting device located at a first end portion of the platform and the second lifting device located at a second end portion of the platform. Preferred embodiments of the invention include powered lateral positioning means for moving the 25 platform transversely. The lateral positioning means preferably comprises a linear actuator connected between the base and the elevator mech~ni.~m. Most preferably the lateral positioning means CA 02234~31 1998-04-09 comprises a spring bi~ing the elevator mech~ni.~m and the platform in a first direction and the linear actuator comprises a pneumatic actuator operable to displace the elevator mech~ni~m and the platform in a second direction opposite to the first direction against force exerted by s the spring.
Another aspect of the invention provides a work system comprising: first and second elongated platforms spaced apart from one another on either side of a work area; first and second powered elevator lo mech~ni.~m~ coupled to the first and second elongated platforms respectively for independently controllably raising and lowering the first and second platforms respectively; a first telescoping bridge member extending between and pivotally connected to respective first ends of the first and second platforms; a second telescoping bridge member 1S extending between and pivotally connected to respective second ends of the first and second platforms. The second telescoping bridge member is detachable from at least one of the first and second platforms to permit substantially unobstructed access to the work area. The telescoping bridge members do not interfere with the ability to raise or 20 lower the platforms independently. The work system permits access all around the periphery of an object, such as a vehicle, located in the central work area.
CA 02234~31 1998-04-09 Description of the Drawings In drawings which illustrate specific embodiments of the invention, but which should not be construed as restricting the spirit or 5 scope of the invention in any way:
Figure 1 is, a top plan view of a work system according to the invention comprising a pair of opposed work stations joined by telescopic e:nd platforms and positioned to provide access to a vehicle;
:Figure 2 is, a top plan sectional view of one of the work lO stations thereof in which the supporting base units are visible;
Figure 3A is a top view of a secondary frame;
Figure 3B is a partially cut away top view of a secondary frame mounted in a base unit;
Figure 4 is a front elevational view of a work station lS according to the invention with its platform in a lowered position;
Figure ~ is a front elevational view of a work station according to the invention with its platform in a fully raised position;
and, :Figure 6 is, a side elevational view of a pair of work stations 20 according to the invention in their raised positions and joined by a telescopic, removable platform to form a work system according to the inventlon.
Detailed Description 2s This invention provides a modular work station which may be assembled into a work system for providing operators with complete ~ CA 02234~31 1998-04-09 access to the exterior of a vehicle or other object. A work system 100 according to one embodiment of the invention is shown in Figure 1.
Work system 100 comprises a pair of opposed work stations 110. Each work station 110 comprises a platform 3. As can be seen in Figure 1, s platform 3 provides an operator 1 (Figure 4) with ready access to any point around the perimeter of a vehicle 2 located in a work area within platform 3.
Preferably each work station 110 is fabricated from light lO weight materials. Where work station 110 will be used in an environment where fl~mm~hle substances are present then platform 3 and other parts of work station 110 are preferably fabricated from aluminum or some other non sparking material. Work station 110 is preferably mounted on retractable casters or wheels 19, 23 so that a lS work station 110 can easily be moved to and from storage and from task to task. It will be appreciated that a work station 110 may be used on its own to provide access along one side of a vehicle or may be combined with another work station 110 into a work system 100 as is illustrated, by way of example, in Figure 1. Wheel assemblies 23 are mounted on 20 removable stabilizer arms 21 which can be detachably affixed in sleeves 20 on base 18.
As best illustrated in Figure 5, each work station 110 comprises an elevator me~h~ni.~m 114 which can raise or lower platform 2s 3 relative to a base 18. An operator 1 can mount platform 3 when it is fully lowered and then raise platform 3 to a desired level by operating CA 02234~31 1998-04-09 a control lever 4. A particular advantage of the illustrated embodiment of the invention is that an operator does not need to climb a ladder to access platfnrm 3. Climbing a ladder while carrying tools or materials can result in accidents.
The design of base 18 of work station 110 may take various forms. It is convenient to make each base 18 in the form of a U-shaped frame. If work station 110 is movable, as described above, but will often be used in the same place (for example, inside a spray booth) then it is desirable to provide some means for repeatably fixing work station 110 in its desired position. This may be accomplished, for example, by fixing releasable clamps (not shown), such as toggle clamps, to the spray booth floor or wall. The clamps may be engaged with sockets 8 on base 18 to lock work station 110 in position.
Platform 3 is slidably supported by elevator trolleys 28 on upright legs 12 which extend upwardly from base 18. Trolleys 28 comprise rollers 41 and 39 that ride up and down guide legs so as to allow platform 3 to travel smoothly up or down along legs 12. Lower roller 39 bears against the front of guide leg 12. Upper roller 41 bears against the rear side of leg 12. Elevator trolleys 28 maintain platform 3 level.
Elevator mech~ni~m 114 comprises a pair of lifting devices 116. One lifting device 116 is connected between base 18 and platform 3 near each end of platform 3.
' CA 02234~31 1998-04-09 As best shown in Figure 5, each lifting device 116 preferably comprises a link~ge 7 comprising first and second arms 7A and 7B
which have first ends pivotally coupled to the base and the platform respectively and second ends pivotally coupled to a carrier 7C. T.ink~ge s 7 further comprises second and third arms 7D and 7E having first ends pivotally coupled to intermediate portions of first arm 7A and second arm 7B and second ends pivotally coupled to one another. A linear actuator 6 is connected between carrier 7C and the coupling which joins the second ends of the second and third arms. Platform 3 may be lifted lo by extending linear actuators 6 and platform 3 may be lowered by retracting linear actuators 6.
Lifting devices 116 are preferably pneumatically operated.
Air operated lifting devices are much less likely than hydraulically 5 operated devices to release oils or other materials which could cont~min7lte a surface to be coated. Linear actuators 6 are therefore, preferably, air actuators such as air cylinders or air bags. Suitable air actuators are readily commercially available and are understood to those skilled in the art and so will not be described here in detail.
An operator may control actuators 6 by operating valves 4 on a control panel 34 which is accessible from platform 3. Compressed air is supplied to valves 4 on control panel 34 from a compressed air supply (not shown). Compressed air is delivered from valves 4 to 2s actuators 6 through hoses 5. Most preferably, control panel 34 is movably disposed on platform 3 so that it can be moved to a location CA 02234~31 1998-04-09 convenient to any location along platform 3 where an operator might be working. For example, control panel 34 is most preferably trolley mounted to guide rails 35 which are solidly connected to and extend along the length of platform 3. Guide rails 36 are, for example, mounted s on posts 33 which extend from platform 3.
Control panel trolleys 34 are preferably fitted with an operator safety line anchor point 38. When an operator is wearing a safety line connected to anchor point 38 control panel 34 will always lo remain within reach as an operator moves back and forth along platform 3. Detachable air line quick connections 36 and 37 may also be provided on control panel 34 to allow the operator 1 to use short hoses for breathing air and air to power a spray gun or air tool. This reduces or elimin~tes the possibility that the operator will trip over or tangle the air hoses as can readily happen when longer hoses are used.
Most preferably, powered lateral positioning means are provided for moving platforms 3 horizontally. This permits each platform 3 to be brought right up to the edge of a vehicle 2. The lateral 20 positioning means may comprise, for example, a linear actuator connectedto slide a secondary frame carrying elevator mech~ni.~m 114 transversely on base 18. In the illustrated embodiment of the invention, base 18 comprises hollow flattened tubes 9 which each slidably receive a foot member 10. Legs 12 are each attached to one of foot members 10 2s to form an inverted, off set, "T" shaped assembly. Legs 12 project upwardly through notches 11 in tubes 9. Lower and upper spreader bars CA 02234~31 1998-04-09 24 and 25 are provided to maintain foot members 10 and upright legs 12 parallel to one another and spaced apart from one another by the correct distance.
s A spring 16 is captured within each tube 9 between an end cap 15 and foot member 10. Springs 16 bias foot members 10 so as to retract platform 3. Platform 3 may be advanced against the bias forces of springs 16 by linear actuators 14. Linear actuators 14 are preferably air actuators. Linear actuators 14 are connected between plates 13 on base 18 and plates 44 on legs 12. Air actuators may be operated with compressed air to drive foot members 10 forwardly, in the process compressing springs 16 against end caps 15. A valve for controlling actuators 14 is preferably provided on control panel 34.
Upper spreader bar 25 may conveniently be used as a mounting point for hangers for hoses, tools, and the like. The illustrated embodiment provides a pair of swinging brackets 27 having hooks for hanging hoses, tools and the like.
Preferably platform 3 is pivotally connected to elevator mech~ni~m 114. This reduces the likelihood that platform 3 could crush a person or foreign object located under the platform as it is lowered. If platform 3 is accidentally lowered onto a person or foreign object then the front edge of platform 3 can tilt upwardly as it is lowered. This 2s reduces the crushing force of the platform's weight. In the illustrated embodiment, platform 3 is connected to elevator trollies 28 by pivot ' CA 02234~31 1998-04-09 assemblies 26. Pivot assemblies arms 26 which connect to pivots 40 on either side of each of elevator trolleys 28. Arms 26 are connected to a suitably reinforced part of platform 3.
s Platform 3 is constructed in a manner which provides a reasonably firm surface on which an operator can stand. Platform 3 preferably comprises an upright rear skirt portion 32. Skirt portion 32 provides platform 3 with longitudinal rigidity and still allows the forward portion of platform 3 to be thin so that when platform 3 is fully lo lowered its surface is not far above the ground. Arms 26 may conveniently be attached to skirt portion 32.
When a work system according to the invention is installed inside a spray booth it is desirable for each platform 3 to extend the full length of the spray booth into the spray booth corners. This m~ximi7.es the useful area of the spray booth. Spray booths have various lengths.
It would not be convenient to custom make a work station to precisely fit into each spray booth. Consequently, the end portions of platforms 3 may comprise custom length platform extension wings 29 which rigidly attach to a central portion of platform 3.
In a work system 100 according to the invention end platforms 31, which may also be called "bridge members", extend between opposing work stations 110 to provide access all around vehicle 2s 2. End platforms 31 are pivotally mounted to end portions of platforms 3 at anchor points 30. At least one of end platforms 31 is preferably CA 02234~31 1998-04-09 removable to allow vehicles or other items to be moved into and out of the central work area. Anchor points 30 preferably comprise recessed pockets so that there is nothing sticking up from platform 3 which could pose a tripping hazard or leave a void. Each end platform 31 comprises s a hook assembly 42 which engages in an anchor point 30 in such a manner that it will not accidentally become disengaged when the platform 3 at either end is raised or lowered.
End platforms 31 are telescopic so that platforms 3 can be o independently raised, lowered and moved transversely while end platforms 31 are in place. Preferably each end platform 31 comprises a guide rail 35 and a trolley 34 which carries a safety harness attachment point 38 and air supply quick connection lines 36 and 37. End platforms 31 may have wheels 43 so that an operator can easily move end 15 platforms 31 out of the way after they have been detached. The wheels may, for example, be flip over type wheels. Wheels 43 may be deployed by flipping them from the storage position illustrated in solid lines in Figure 6 to the deployed position shown in dotted lines in Figure 6.
Platform 3 is preferably constructed so that it will not disturb the patterns or airflow inside a spray booth any more than is necessary. This may be accomplished by penetrating platforms 3 and 31 with many through apertures. The apertures permit the free flow of air through platforms 3 and 31 without adding turbulence which would pick up foreign particles and deposit them in a vehicle coating or disturb the pattern of paint being sprayed.
CA 02234~31 1998-04-09 As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereo~ Accordingly, the scope of the invention is to be s construed in accordance with the substance defined by the following claims.
Field of the Invention This invention relates to a work station for providing an operator with a raised working platform. The invention has particular application to work stations for use in auto body repair and vehicle painting. I'he invention relates particularly to work stations which provide a platform that can be raised and lowered to provide an o operator with a variable height working platform.
Background of the Invention Performing coating processes, exterior repairs or placement of body components and accessories on vehicles requires an operator to have ready access to positions around and about the complete exterior of the vehicle. In order to do these tasks safely and efficiently an operator should have unrestricted access to a vehicle while maint~inin~
balance. This minimi7.es the likelihood that the operator will over extend his reach, trip, fall or lose his footing. Further, the operator should be able to move back and forth along the vehicle in a smooth unimpeded fashion while painting. Otherwise it will be difficult or impossible to apply coatings evenly and the appearance and durability of the final product will suffer. Some kind of an elevated work station is needed to allow upper portions of larger vehicles to be prepared and painted.
' CA 02234~31 1998-04-09 .Automobile painters currently use various systems of ladders, lifts platforms and scaffolding to provide them with easy access to the elevated portions of vehicles. All of these systems suffer from one or more disadvantages. For example, Fabrizi, U.S. Patent No. 5,584,759 5 provides a spray booth having a raised perimetral walkway. A lift is located in a work area inside the walkway. A vehicle or other item to be painted can be placed on the lift and raised to a level which provides an operator st~nrling on the platform with comfortable access to a selected part of the vehicle. The Fabrizi system requires substantial overhead lO clearance to use, is not easily reconfigurable, and is expensive because it includes a lift powerful enough to raise a heavy vehicle.
Fredericks, U.S. Patent 3,997,024 describes an adjustable scaffolding platform which could be used in painting vehicles. An 15 operator must climb a ladder to gain access to the platform. Adjusting the height of the platform is reasonably difficult for a single person to do and cannot be done while a person is on the platform.
Leezer, U.S. patent 5,544,592 describes a folding table for 20 use in spray booths. The surface of the table provides a platform on which an operator can stand. The height of the Leezer table is not easily adjustable and cannot be altered when the table is occupied by an operator. An operator must climb up a ladder to gain access to the table.
:Billington et al., U.S. patent No. 5,217,090 shows an adjustable height work station for use by factory production workers.
' CA 02234~31 1998-04-09 The Billington et al. work station is not adapted for use in painting vehicles and its platform cannot be lowered completely to the ground.
A particular problem in providing systems for use in spray 5 booths is that it is important to maintain air flow patterns within the spray booth which do not interfere with the painting process. Spray booths are designed to avoid harmful air flow patterns. Introducing scaffolding or other structures into a spray booth can ch~nge air flow patterns within the spray booth in an undesirable way.
There remains a need for a versatile, reasonably cost effective work stand which will allow operators to access and work on various aspects of an object, such as a vehicle, with maximum efficiency.
There is a particular need for such a work stand which can be used with 5 good effect in an automotive type spray booth.
Summary of the Invention Accordingly, a first aspect of the invention provides a work 20 station. The work station comprises a base; an elongated platform coupled to the base; and an elevator mech~ni.~m coupled between the base and the platform for controllably raising and lowering the platform relative to the base. The platform is pivotally connected to the elevator mech~ni.~m such that the platform is upwardly pivotally displaceable 25 from a horizontal position. This reduces the possibility that the platform could crush a person or foreign object that gets underneath the platform by allowing the platform to pivot upwardly if the platform is lowered on - CA 02234~31 1998-04-09 top of a person or foreign object. The work station preferably comprises a trolley assembly slidably mounted for longitudinal travel along the platform. I'he trolley assembly bears a controller for operating the elevator mech~ni.qm. The trolley permits the controller to be moved to 5 a convenient location along the platform. The trolley may include a safety harness attachment point.
A second aspect of the invention provides a work station. The work station comprises a base, an elongated platform coupled to the lo base, and an elevator mech~ni.~m coupled between the base and the platform for controllably r~ ing and lowering the platform relative to the base. The elevator mech~ni.~m comprises a lifting device having:
first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to 5 a carrier; second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, a linear actuator connected between the carrier and the second ends of the second and third arms. In a preferred embodiment the linear actuator comprises a 20 pneumatic actuator. Preferably the elevator mech~ni~m comprises first and second lifting devices, with the first lifting device located at a first end portion of the platform and the second lifting device located at a second end portion of the platform. Preferred embodiments of the invention include powered lateral positioning means for moving the 25 platform transversely. The lateral positioning means preferably comprises a linear actuator connected between the base and the elevator mech~ni.~m. Most preferably the lateral positioning means CA 02234~31 1998-04-09 comprises a spring bi~ing the elevator mech~ni.~m and the platform in a first direction and the linear actuator comprises a pneumatic actuator operable to displace the elevator mech~ni~m and the platform in a second direction opposite to the first direction against force exerted by s the spring.
Another aspect of the invention provides a work system comprising: first and second elongated platforms spaced apart from one another on either side of a work area; first and second powered elevator lo mech~ni.~m~ coupled to the first and second elongated platforms respectively for independently controllably raising and lowering the first and second platforms respectively; a first telescoping bridge member extending between and pivotally connected to respective first ends of the first and second platforms; a second telescoping bridge member 1S extending between and pivotally connected to respective second ends of the first and second platforms. The second telescoping bridge member is detachable from at least one of the first and second platforms to permit substantially unobstructed access to the work area. The telescoping bridge members do not interfere with the ability to raise or 20 lower the platforms independently. The work system permits access all around the periphery of an object, such as a vehicle, located in the central work area.
CA 02234~31 1998-04-09 Description of the Drawings In drawings which illustrate specific embodiments of the invention, but which should not be construed as restricting the spirit or 5 scope of the invention in any way:
Figure 1 is, a top plan view of a work system according to the invention comprising a pair of opposed work stations joined by telescopic e:nd platforms and positioned to provide access to a vehicle;
:Figure 2 is, a top plan sectional view of one of the work lO stations thereof in which the supporting base units are visible;
Figure 3A is a top view of a secondary frame;
Figure 3B is a partially cut away top view of a secondary frame mounted in a base unit;
Figure 4 is a front elevational view of a work station lS according to the invention with its platform in a lowered position;
Figure ~ is a front elevational view of a work station according to the invention with its platform in a fully raised position;
and, :Figure 6 is, a side elevational view of a pair of work stations 20 according to the invention in their raised positions and joined by a telescopic, removable platform to form a work system according to the inventlon.
Detailed Description 2s This invention provides a modular work station which may be assembled into a work system for providing operators with complete ~ CA 02234~31 1998-04-09 access to the exterior of a vehicle or other object. A work system 100 according to one embodiment of the invention is shown in Figure 1.
Work system 100 comprises a pair of opposed work stations 110. Each work station 110 comprises a platform 3. As can be seen in Figure 1, s platform 3 provides an operator 1 (Figure 4) with ready access to any point around the perimeter of a vehicle 2 located in a work area within platform 3.
Preferably each work station 110 is fabricated from light lO weight materials. Where work station 110 will be used in an environment where fl~mm~hle substances are present then platform 3 and other parts of work station 110 are preferably fabricated from aluminum or some other non sparking material. Work station 110 is preferably mounted on retractable casters or wheels 19, 23 so that a lS work station 110 can easily be moved to and from storage and from task to task. It will be appreciated that a work station 110 may be used on its own to provide access along one side of a vehicle or may be combined with another work station 110 into a work system 100 as is illustrated, by way of example, in Figure 1. Wheel assemblies 23 are mounted on 20 removable stabilizer arms 21 which can be detachably affixed in sleeves 20 on base 18.
As best illustrated in Figure 5, each work station 110 comprises an elevator me~h~ni.~m 114 which can raise or lower platform 2s 3 relative to a base 18. An operator 1 can mount platform 3 when it is fully lowered and then raise platform 3 to a desired level by operating CA 02234~31 1998-04-09 a control lever 4. A particular advantage of the illustrated embodiment of the invention is that an operator does not need to climb a ladder to access platfnrm 3. Climbing a ladder while carrying tools or materials can result in accidents.
The design of base 18 of work station 110 may take various forms. It is convenient to make each base 18 in the form of a U-shaped frame. If work station 110 is movable, as described above, but will often be used in the same place (for example, inside a spray booth) then it is desirable to provide some means for repeatably fixing work station 110 in its desired position. This may be accomplished, for example, by fixing releasable clamps (not shown), such as toggle clamps, to the spray booth floor or wall. The clamps may be engaged with sockets 8 on base 18 to lock work station 110 in position.
Platform 3 is slidably supported by elevator trolleys 28 on upright legs 12 which extend upwardly from base 18. Trolleys 28 comprise rollers 41 and 39 that ride up and down guide legs so as to allow platform 3 to travel smoothly up or down along legs 12. Lower roller 39 bears against the front of guide leg 12. Upper roller 41 bears against the rear side of leg 12. Elevator trolleys 28 maintain platform 3 level.
Elevator mech~ni~m 114 comprises a pair of lifting devices 116. One lifting device 116 is connected between base 18 and platform 3 near each end of platform 3.
' CA 02234~31 1998-04-09 As best shown in Figure 5, each lifting device 116 preferably comprises a link~ge 7 comprising first and second arms 7A and 7B
which have first ends pivotally coupled to the base and the platform respectively and second ends pivotally coupled to a carrier 7C. T.ink~ge s 7 further comprises second and third arms 7D and 7E having first ends pivotally coupled to intermediate portions of first arm 7A and second arm 7B and second ends pivotally coupled to one another. A linear actuator 6 is connected between carrier 7C and the coupling which joins the second ends of the second and third arms. Platform 3 may be lifted lo by extending linear actuators 6 and platform 3 may be lowered by retracting linear actuators 6.
Lifting devices 116 are preferably pneumatically operated.
Air operated lifting devices are much less likely than hydraulically 5 operated devices to release oils or other materials which could cont~min7lte a surface to be coated. Linear actuators 6 are therefore, preferably, air actuators such as air cylinders or air bags. Suitable air actuators are readily commercially available and are understood to those skilled in the art and so will not be described here in detail.
An operator may control actuators 6 by operating valves 4 on a control panel 34 which is accessible from platform 3. Compressed air is supplied to valves 4 on control panel 34 from a compressed air supply (not shown). Compressed air is delivered from valves 4 to 2s actuators 6 through hoses 5. Most preferably, control panel 34 is movably disposed on platform 3 so that it can be moved to a location CA 02234~31 1998-04-09 convenient to any location along platform 3 where an operator might be working. For example, control panel 34 is most preferably trolley mounted to guide rails 35 which are solidly connected to and extend along the length of platform 3. Guide rails 36 are, for example, mounted s on posts 33 which extend from platform 3.
Control panel trolleys 34 are preferably fitted with an operator safety line anchor point 38. When an operator is wearing a safety line connected to anchor point 38 control panel 34 will always lo remain within reach as an operator moves back and forth along platform 3. Detachable air line quick connections 36 and 37 may also be provided on control panel 34 to allow the operator 1 to use short hoses for breathing air and air to power a spray gun or air tool. This reduces or elimin~tes the possibility that the operator will trip over or tangle the air hoses as can readily happen when longer hoses are used.
Most preferably, powered lateral positioning means are provided for moving platforms 3 horizontally. This permits each platform 3 to be brought right up to the edge of a vehicle 2. The lateral 20 positioning means may comprise, for example, a linear actuator connectedto slide a secondary frame carrying elevator mech~ni.~m 114 transversely on base 18. In the illustrated embodiment of the invention, base 18 comprises hollow flattened tubes 9 which each slidably receive a foot member 10. Legs 12 are each attached to one of foot members 10 2s to form an inverted, off set, "T" shaped assembly. Legs 12 project upwardly through notches 11 in tubes 9. Lower and upper spreader bars CA 02234~31 1998-04-09 24 and 25 are provided to maintain foot members 10 and upright legs 12 parallel to one another and spaced apart from one another by the correct distance.
s A spring 16 is captured within each tube 9 between an end cap 15 and foot member 10. Springs 16 bias foot members 10 so as to retract platform 3. Platform 3 may be advanced against the bias forces of springs 16 by linear actuators 14. Linear actuators 14 are preferably air actuators. Linear actuators 14 are connected between plates 13 on base 18 and plates 44 on legs 12. Air actuators may be operated with compressed air to drive foot members 10 forwardly, in the process compressing springs 16 against end caps 15. A valve for controlling actuators 14 is preferably provided on control panel 34.
Upper spreader bar 25 may conveniently be used as a mounting point for hangers for hoses, tools, and the like. The illustrated embodiment provides a pair of swinging brackets 27 having hooks for hanging hoses, tools and the like.
Preferably platform 3 is pivotally connected to elevator mech~ni~m 114. This reduces the likelihood that platform 3 could crush a person or foreign object located under the platform as it is lowered. If platform 3 is accidentally lowered onto a person or foreign object then the front edge of platform 3 can tilt upwardly as it is lowered. This 2s reduces the crushing force of the platform's weight. In the illustrated embodiment, platform 3 is connected to elevator trollies 28 by pivot ' CA 02234~31 1998-04-09 assemblies 26. Pivot assemblies arms 26 which connect to pivots 40 on either side of each of elevator trolleys 28. Arms 26 are connected to a suitably reinforced part of platform 3.
s Platform 3 is constructed in a manner which provides a reasonably firm surface on which an operator can stand. Platform 3 preferably comprises an upright rear skirt portion 32. Skirt portion 32 provides platform 3 with longitudinal rigidity and still allows the forward portion of platform 3 to be thin so that when platform 3 is fully lo lowered its surface is not far above the ground. Arms 26 may conveniently be attached to skirt portion 32.
When a work system according to the invention is installed inside a spray booth it is desirable for each platform 3 to extend the full length of the spray booth into the spray booth corners. This m~ximi7.es the useful area of the spray booth. Spray booths have various lengths.
It would not be convenient to custom make a work station to precisely fit into each spray booth. Consequently, the end portions of platforms 3 may comprise custom length platform extension wings 29 which rigidly attach to a central portion of platform 3.
In a work system 100 according to the invention end platforms 31, which may also be called "bridge members", extend between opposing work stations 110 to provide access all around vehicle 2s 2. End platforms 31 are pivotally mounted to end portions of platforms 3 at anchor points 30. At least one of end platforms 31 is preferably CA 02234~31 1998-04-09 removable to allow vehicles or other items to be moved into and out of the central work area. Anchor points 30 preferably comprise recessed pockets so that there is nothing sticking up from platform 3 which could pose a tripping hazard or leave a void. Each end platform 31 comprises s a hook assembly 42 which engages in an anchor point 30 in such a manner that it will not accidentally become disengaged when the platform 3 at either end is raised or lowered.
End platforms 31 are telescopic so that platforms 3 can be o independently raised, lowered and moved transversely while end platforms 31 are in place. Preferably each end platform 31 comprises a guide rail 35 and a trolley 34 which carries a safety harness attachment point 38 and air supply quick connection lines 36 and 37. End platforms 31 may have wheels 43 so that an operator can easily move end 15 platforms 31 out of the way after they have been detached. The wheels may, for example, be flip over type wheels. Wheels 43 may be deployed by flipping them from the storage position illustrated in solid lines in Figure 6 to the deployed position shown in dotted lines in Figure 6.
Platform 3 is preferably constructed so that it will not disturb the patterns or airflow inside a spray booth any more than is necessary. This may be accomplished by penetrating platforms 3 and 31 with many through apertures. The apertures permit the free flow of air through platforms 3 and 31 without adding turbulence which would pick up foreign particles and deposit them in a vehicle coating or disturb the pattern of paint being sprayed.
CA 02234~31 1998-04-09 As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereo~ Accordingly, the scope of the invention is to be s construed in accordance with the substance defined by the following claims.
Claims (27)
1. A work station comprising:
(a) a base;
(b) an elongated platform coupled to the base; and (c) an elevator mechanism coupled between the base and the platform for controllably raising and lowering the platform relative to the base;
wherein the platform is pivotally connected to the elevator mechanism such that the platform is upwardly pivotally displaceable from a horizontal position.
(a) a base;
(b) an elongated platform coupled to the base; and (c) an elevator mechanism coupled between the base and the platform for controllably raising and lowering the platform relative to the base;
wherein the platform is pivotally connected to the elevator mechanism such that the platform is upwardly pivotally displaceable from a horizontal position.
2. The work station of claim 1 comprising a trolley assembly slidably mounted for longitudinal travel along the platform, the trolley assembly bearing a controller for operating the elevator mechanism.
3. The work station of claim 2 comprising a safety harness attachment point on the trolley assembly.
4. A work station comprising:
(a) a base;
(b) an elongated platform coupled to the base; and (c) an elevator mechanism coupled between the base and the platform for controllably raising and lowering the platform relative to the base, the elevator mechanism comprising a lifting device having:
i) first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to a carrier;
ii) second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, iii) a linear actuator connected between the carrier and the second ends of the second and third arms.
(a) a base;
(b) an elongated platform coupled to the base; and (c) an elevator mechanism coupled between the base and the platform for controllably raising and lowering the platform relative to the base, the elevator mechanism comprising a lifting device having:
i) first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to a carrier;
ii) second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, iii) a linear actuator connected between the carrier and the second ends of the second and third arms.
5. The work station of claim 4 wherein the linear actuator comprises a pneumatic actuator.
6. The work station of claim 5 wherein the elevator mechanism comprises first and second lifting devices as claimed in claim 3, the first lifting device located at a first end portion of the platform and the second lifting device located at a second end portion of the platform.
7. The work station of claim 5 wherein the linear actuators in the first and second lifting devices each comprise a pneumatic actuator.
8. The work station of claim 6 wherein a control for operating the elevator mechanism is mounted on the platform by mounting means which permit the control to be moved to a selected position along the platform.
9. The work station of any one of claims 4, 5, 6, 7 or 8 further comprising powered lateral positioning means for moving the platform transversely.
10. The work station of claim 9 wherein the lateral positioning means comprises a linear actuator connected between the base and the elevator mechanism.
11. The work station of claim 10 wherein the lateral positioning means comprises a spring biasing the elevator mechanism and the platform in a first direction and the linear actuator comprises a pneumatic actuator operable to displace the elevator mechanism and the platform in a second direction opposite to the first direction against force exerted by the spring.
12. The work station of any one of claims 4, 6, 6, 7, 8, 9, 10 or 11 wherein the platform is pivotally connected to the elevator mechanism such that the platform is upwardly pivotally displaceable from a horizontal position.
13. The work station of any one of claims 4, 5, 6, 7, 8, 9, 10, 11 or 12 comprising a first upright member extending upwardly from the base and a second vertical member extending upwardly from the base at a location spaced along the platform from the first upright member wherein the elevator mechanism comprises a platform pivot assembly mounted for vertical travel along the first and second upright members and the platform is pivotally mounted to the platform pivot assembly.
14. The work station of any one of claims 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13 wherein the platform comprises a surface perforated by apertures permitting air currents to flow therethrough.
15. The work station of any one of claims 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 comprising a trolley assembly slidably mounted for longitudinal travel along the platform, the trolley assembly bearing a controller for operating the elevator mechanism.
16. The work station of any one of claims 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 comprising a trolley assembly slidably mounted for longitudinal travel along the platform, the trolley assembly bearing a controller for operating the elevator mechanism and a safety harness attachment point.
17. A work system comprising:
(a) first and second elongated platforms spaced apart from one another on either side of a work area;
(b) first and second powered elevator mechanisms coupled to the first and second elongated platforms respectively for independently controllably raising and lowering the first and second platforms respectively;
(c) a first telescoping bridge member extending between and pivotally connected to respective first ends of the first and second platforms;
(d) a second telescoping bridge member extending between and pivotally connected to respective second ends of the first and second platforms;
wherein the second telescoping bridge member is detachable from at least one of the first and second platforms to permit substantially unobstructed access to the work area.
(a) first and second elongated platforms spaced apart from one another on either side of a work area;
(b) first and second powered elevator mechanisms coupled to the first and second elongated platforms respectively for independently controllably raising and lowering the first and second platforms respectively;
(c) a first telescoping bridge member extending between and pivotally connected to respective first ends of the first and second platforms;
(d) a second telescoping bridge member extending between and pivotally connected to respective second ends of the first and second platforms;
wherein the second telescoping bridge member is detachable from at least one of the first and second platforms to permit substantially unobstructed access to the work area.
18. The work system of claim 17 wherein each of the first and second elevator mechanisms comprises a lifting device having:
a) first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to a carrier;
b) second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, c) a linear actuator connected between the carrier and the second ends of the second and third arms.
a) first and second arms having first ends pivotally coupled to the base and the platform respectively and having second ends pivotally coupled to a carrier;
b) second and third arms having first ends pivotally coupled to intermediate portions of the first and second arms respectively and second ends pivotally coupled to one another; and, c) a linear actuator connected between the carrier and the second ends of the second and third arms.
19. The work system of claim 18 wherein each of the linear actuators comprises a pneumatic actuator.
20. The work system of claim 19 wherein each of the elevator mechanisms comprises first and second lifting devices as claimed in claim 14, the first lifting device located at a first end portion of the platform and the second lifting device located at a second end portion of the platform.
21. The work system of claim 20 wherein the linear actuator in each of the first and second lifting devices each comprises a pneumatic actuator.
22. The work system of claim 21 wherein a control for operating each elevator mechanism is mounted on the platform supported by that elevator mechanism by mounting means which permit the control to be moved to a selected position along the platform.
23. The work system of any one of claims 18, 19, 20, 21 or 22 comprising a lateral positioning means for controllably moving the first platform transversely into or out of the work area.
24. The work station of claim 23 wherein the first platform is carried on a frame disposed slidably on a base and the lateral positioning means comprises a spring biasing the frame in a first direction and the linear actuator comprises a pneumatic actuator operable to displace the frame in a second direction opposite to the first direction.
25. The work station of any one of claims 18, 19, 21, 21, 22, 23 or 24 wherein the first and second platforms are pivotally connected to the first and second elevator mechanisms respectively such that each platform is upwardly pivotally displaceable from a horizontal orientation.
26. The work station of any one of claims 18, 19, 21, 21, 22, 23 or 24 comprising a trolley assembly slidably mounted for longitudinal travel along the platform, the trolley assembly bearing a controller for operating the elevator mechanism.
27. The work station of any one of claims 18, 19, 21, 21, 22, 23 or 24 comprising a trolley assembly slidably mounted for longitudinal travel along the platform, the trolley assembly bearing a controller for operating the elevator mechanism and a safety harness attachment point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2234531 CA2234531A1 (en) | 1997-06-25 | 1998-04-09 | Adjustable work station |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,207,567 | 1997-06-25 | ||
| CA002207567A CA2207567A1 (en) | 1997-06-25 | 1997-06-25 | Eckpy paint partner(tm) a spray booth operator elevating and positioning device |
| CA 2234531 CA2234531A1 (en) | 1997-06-25 | 1998-04-09 | Adjustable work station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2234531A1 true CA2234531A1 (en) | 1998-12-25 |
Family
ID=25679419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2234531 Abandoned CA2234531A1 (en) | 1997-06-25 | 1998-04-09 | Adjustable work station |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2234531A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1700817A1 (en) * | 2005-03-08 | 2006-09-13 | Roisber Servicios, S.L. | System for raising-lowering a platform inside a painting booth |
-
1998
- 1998-04-09 CA CA 2234531 patent/CA2234531A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1700817A1 (en) * | 2005-03-08 | 2006-09-13 | Roisber Servicios, S.L. | System for raising-lowering a platform inside a painting booth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5269501A (en) | Vehicle and vehicle parts transportation system | |
| US6405831B1 (en) | Mobile lift unit | |
| US5588500A (en) | Elevatable work facility | |
| US5829948A (en) | Multipurpose lift apparatus and method | |
| FI85232B (en) | FOERFARANDE VID JUSTERINGEN AV EN BILKAROSS OCH ETT JUSTERANORDNINGSARRANGEMANG. | |
| US2938595A (en) | Multiple lift | |
| US4897011A (en) | Mechanical lift device | |
| US11873196B2 (en) | Mobile crane having a folding walking platform | |
| KR101904235B1 (en) | Aerial work device | |
| CA2234531A1 (en) | Adjustable work station | |
| CN220514486U (en) | Powder blocking device of hanging rack in spraying room of coating production line | |
| US20050204967A1 (en) | Over-head creeper | |
| US20240100685A1 (en) | Mobile elevating work platform safety accessory | |
| US3537545A (en) | Positioning device for elevated structures | |
| CA2633824C (en) | Movable platform apparatus for accessing large vehicles | |
| CN211397417U (en) | Operation ladder for electromechanical engineering | |
| CN112942771A (en) | Building wall construction mechanism | |
| CA2207567A1 (en) | Eckpy paint partner(tm) a spray booth operator elevating and positioning device | |
| CA2168316C (en) | Lifting and swivelling device, in particular for motor vehicles | |
| JP2529436Y2 (en) | Ladder structure for aerial work vehicles | |
| CN220351656U (en) | Power distribution network operation maintenance frame | |
| CN219100646U (en) | Station working ladder with protection function | |
| RU83770U1 (en) | CAR HYDRAULIC LIFT AND WORK LIFT PLATFORM | |
| JP2604064Y2 (en) | Aerial work vehicle | |
| CN215474833U (en) | Special-purpose vehicle is folding steps on top ladder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |