초록 ▼

A work platform unit (1) mountable to a ladder (3) the unit including a platform (2) upon which a work person may stand and which is adapted for mounting to the upper end of the ladder (3) such that when the ladder is located in a position of use the platform (2) may be set to a horizontal position,

A work platform unit (1) mountable to a ladder (3) the unit including a platform (2) upon which a work person may stand and which is adapted for mounting to the upper end of the ladder (3) such that when the ladder is located in a position of use the platform (2) may be set to a horizontal position, and a safety barrier construction for providing all round safety protection to a person when standing upon the platform, the safety barrier construction involving a framework (22) upstanding from the perimeter region of the platform (2) and incorporating a gate arrangements (42,43) such that when closed the framework (22) effectively totally surrounds a person when present upon the platform (2) to provide said all round protection.

대표청구항 ▼

1. A work platform unit mountable to a ladder, comprising: a platform upon which a work person may stand, the platform mountable to an end of a ladder such that when the ladder is located in a position of use the platform is settable to a horizontal position, anda safety barrier construction located

1. A work platform unit mountable to a ladder, comprising: a platform upon which a work person may stand, the platform mountable to an end of a ladder such that when the ladder is located in a position of use the platform is settable to a horizontal position, anda safety barrier construction located above the platform, the safety barrier construction providing all around safety protection to the work person when standing upon the platform,wherein said platform includes socket members engagable with upper ends of each stile of the ladder,wherein the safety barrier construction framework includes an arrangement comprised ofi) a first pair of upright members upstanding from corners of the platform remote from a region of the platform associated with said sockets,ii) an upper rail interconnecting tops of the upright members,iii) an intermediate rail interconnecting the upright members intermediate the top and bottom thereof, said upper and intermediate rails and the upright members defining a rectangular sub-frame facing towards any support against which the ladder rests when in use,iv) a curved tubular upper rail and intermediate rail extending from free end regions of each of said upper and intermediate rails, the upright members interconnecting the free end regions of the upper and intermediate tubular rails, andv) outwards leaning further upright members supporting the free end regions of the intermediate tubular rails with respect to the platform,the arrangement being such that the tubular rails and the associated upright members define a partially cylindrical framework having a diameter greater than the width of the platform,wherein the safety barrier construction incorporates a gate arrangement such that with the gate arrangement closed, the framework effectively totally surrounds the work person when present upon the platform thereby to provide said all around protection, andwherein the gate arrangement includes a respective gate member for each side of the platform with each said gate member including i) upper and lower curved rails that are respectively slidably engageable in the upper and intermediate tubular rails and ii) a vertical member interconnecting exposed free ends of the upper and lower curved rails, the gate arrangement being such that when said vertical member of each gate member are located side by side, the gate members combine to provide a partially cylindrical closure to the gate arrangement. 2. A work platform unit as claimed in claim 1, wherein the socket members are releasably engageable with the upper ends of each stile and a locking element locks the socket members to the upper ends of each stile. 3. A work platform unit as claimed in claim 2, wherein, the locking element is a locking pin engageable with bores in an end of each stile and the associated socket, the locking pin locking the bore and associated socket together, andfurther comprising a part preventing movement between the socket and the associated stile. 4. A work platform unit as claimed in claim 3, wherein, each socket includes a threaded bore, andthe part preventing movement includes a thumb screw engageable with the threaded bore in the socket such that when the thumb screw is tightened, a free end of the thumb screw exerts a clamping pressure on the stile. 5. A work platform unit as claimed in claim 1, wherein each side of the platform includes a side rail provided with forwardly projecting support that maintains the platform in a required operational position relative to an associated end of the ladder, each side rail is further provided with a pivotable connected strut, each strut connectable to an associated stile of the ladder. 6. A work platform unit as claimed in claim 5, wherein the forwardly projecting support includes a wheel positioned as engage with a surface against which the ladder is to rest in such manner as to facilitate raising and lowering of the ladder. 7. A work platform unit as claimed in claim 1, wherein an upper part of the safety framework is provided with wheels that are capable of engaging with a surface against which the ladder is to rest in such manner as to facilitate raising and lowering of the ladder. 8. A work platform unit as claimed in claim 1, and wherein the gate members lock together. 9. A work platform unit mountable to a ladder, comprising: a platform upon which a work person may stand, the platform mountable to an end of a ladder such that when the ladder is located in a position of use the platform is settable to a horizontal position, anda safety barrier construction located above the platform, the safety barrier construction providing all around safety protection to the work person when standing upon the platform,wherein said platform includes socket members releasably engagable with upper ends of each stile of the ladder, each socket including a threaded bore, anda locking pin that locks the socket members to the upper ends of each stile, the locking pin engageable with bores in an end of each stile and the threaded bore of the associated socket, the locking pin locking the bore and associated socket together,wherein the locking pin comprising a part preventing movement between the socket and the associated stile, the part preventing movement including a thumb screw engageable with the threaded bore in the socket such that when the thumb screw is tightened, a free end of the thumb screw exerts a clamping pressure on the stile,wherein the safety barrier construction framework includes an arrangement comprised ofi) a first pair of upright members upstanding from corners of the platform remote from a region of the platform associated with said sockets,ii) an upper rail interconnecting tops of the upright members,iii) an intermediate rail interconnecting the upright members intermediate the top and bottom thereof, said upper and intermediate rails and the upright members defining a rectangular sub-frame facing towards any support against which the ladder rests when in use,iv) a curved tubular upper rail and intermediate rail extending from free end regions of each of said upper and intermediate rails, the upright members interconnecting the free end regions of the upper and intermediate tubular rails, andv) outwards leaning further upright members supporting the free end regions of the intermediate tubular rails with respect to the platform,the arrangement being such that the tubular rails and the associated upright members define a partially cylindrical framework having a diameter greater than the width of the platform. 10. A work platform unit mountable to a ladder, comprising: a platform upon which a work person may stand, the platform mountable to an end of a ladder such that when the ladder is located in a position of use the platform is settable to a horizontal position, anda safety barrier construction located above the platform, the safety barrier construction providing all around safety protection to the work person when standing upon the platform,wherein said platform includes socket members releasably engagable with upper ends of each stile of the ladder, each socket including a threaded bore, anda locking pin that locks the socket members to the upper ends of each stile, the locking pin engageable with bores in an end of each stile and the threaded bore of the associated socket, the locking pin locking the bore and associated socket together,wherein the locking pin comprising a part preventing movement between the socket and the associated stile, the part preventing movement including a thumb screw engageable with the threaded bore in the socket such that when the thumb screw is tightened, a free end of the thumb screw exerts a clamping pressure on the stile,wherein each side of the platform includes a side rail provided with forwardly projecting support that maintains the platform in a required operational position relative to an associated end of the ladder,wherein each side rail is further provided with a pivotable connected strut, each strut connectable to an associated stile of the ladder,wherein the forwardly projecting support includes a wheel positioned as engage with a surface against which the ladder is to rest in such manner as to facilitate raising and lowering of the ladder,wherein an upper part of the safety framework is provided with wheels that engage with a surface against which the ladder is to rest in such manner as to facilitate raising and lowering of the ladder,wherein the safety barrier construction includes a gate arrangement such that with the gate arrangement closed, the framework effectively totally surrounds the work person present upon the platform, andwherein the gate arrangement includes two gate members respectively for each side of the platform, each said gate member including i) upper and lower curved rails that are respectively slidably engageable in the upper and intermediate tubular rails and ii) a vertical member interconnecting exposed free ends of the upper and lower curved rails, the gate arrangement being such that when said vertical member of each of the two gate members are located side by side, the gate members combine to provide a partially cylindrical closure to the gate arrangement. 11. A work platform unit as claimed in claim 10, wherein, said two gate members lock together.