초록 ▼

A retractable step assembly (400) for a cab (C) for a mobile machine includes a leg (450) slideably received in a through-hole (408) in a platform (58) of a cab (C). An upper end (452) of the leg (450) is fixed to a lower end (434) of a stretchable spring (430) whose upper end (432) is fixed. A step

A retractable step assembly (400) for a cab (C) for a mobile machine includes a leg (450) slideably received in a through-hole (408) in a platform (58) of a cab (C). An upper end (452) of the leg (450) is fixed to a lower end (434) of a stretchable spring (430) whose upper end (432) is fixed. A step (470) is mounted to the lower end (454) of the leg (450). The leg (450) is movable between a retracted position and an extended position in which the step (470) is nearer to the ground than in the retracted position. The step (470) can be stepped on by an operator to move the leg (450) to the extended position to thereby allow the operator to exit the cab (C) by stepping on the step (470). The leg (450) can be unlatched by the operator in the cab (C) to return to the retracted position under action of the spring (430).

대표청구항 ▼

The invention claimed is: 1. A cab for a mobile machine comprising, in combination: a platform having a top side and an underside, with a through-hole extending through the platform between the top side and the underside; a plurality of partitions mounted on the top side of the platform and definin

The invention claimed is: 1. A cab for a mobile machine comprising, in combination: a platform having a top side and an underside, with a through-hole extending through the platform between the top side and the underside; a plurality of partitions mounted on the top side of the platform and defining an enclosure for receiving an operator, with one of the plurality of partitions including a door allowing access to and from the enclosure; a leg slideably received in the through-hole, with the leg including a lower end extending downward through the through-hole of the platform; a spring including an upper end and a lower end, with the leg including an upper end fixed to the lower end of the spring, with the upper end of the spring being fixed to the enclosure spaced from the through-hole, with the spring being stretchable in a vertical direction perpendicular to the platform; and a step mounted to the lower end of the leg and extending in a horizontal direction parallel to the platform, with the leg being movable between a retracted position and an extended position in which a spacing between the step and the underside of the platform is larger than that in the retracted position, with the leg being biased by the spring from the extended position to the retracted position, and with the leg being releasably latched in the extended position against bias of the spring, and with the step being adapted to be stepped on by the operator to move the leg from the retracted position to the extended position to thereby allow the operator to exit the enclosure via the door by stepping on the step, and with the leg in the extended position being adapted to be unlatched by the operator in the enclosure to return to the retracted position under action of the spring. 2. The cab as claimed in claim 1 with the plurality of partitions including a front partition and a side partition, with the side partition having the door, with the plurality of partitions further including a corner partition extending between the front partition and the side partition, with the corner partition being at an obtuse angle with the front partition and at an obtuse angle with the side partition, and with the spring and the leg being located in an interconnection between the side partition and the corner partition. 3. The cab as claimed in claim 1 further comprising, in combination: a tube mounted in one of the plurality of partitions, with the tube including a vertical hole in alignment with the through-hole of the platform and parallel to the vertical direction, and with the spring being stretchably received in the vertical hole of the tube. 4. The cab as claimed in claim 3 further comprising, in combination: a bottom plate fixed to the underside of the platform, with the bottom plate including a slot through which the leg slideably extends, with each of the leg and the slot of the bottom plate including non-circular cross-sections perpendicular to the vertical direction preventing rotation of the leg relative to the bottom plate. 5. The cab as claimed in claim 4 with the leg including a bulge between the upper end and the lower end thereof, and with the bulge having a size greater than and abutting with the slot of the mounting plate for preventing excessive extension of the leg out of the cab. 6. The cab as claimed in claim 3 with the tube including an upper end and an intermediate portion, with one of the plurality of partitions including a holder spaced from the through-hole, with the holder including a through-hole through which the intermediate portion of the tube extends, with the cab further comprising, in combination: a pin extending through the upper end of the tube, with the upper end of the spring being a hook engaged with the pin. 7. The cab as claimed in claim 1 further comprising, in combination: a shoe mounted to the step and including two spaced wings extending in a direction parallel to the horizontal direction of the step and defining a groove therebetween in which the step is received, with each of the wings including a plurality of serrations on a top edge thereof and with the plurality of serrations being adapted to be stepped on for moving the leg from the retracted position to the extended position. 8. The cab as claimed in claim 1 further comprising, in combination: a latch for retaining the spring in a stretched state for releasably latching the leg in the extended position, with the leg including a catch portion, with the latch including a handle and a plunger extending from the handle in a direction perpendicular to the vertical direction, with the plunger having a first end interconnected to the handle and a second end, with the second end of the plunger abutting against the catch portion of the leg when the leg is in the extended position, with the handle being operable to disengage the second end of the plunger from the catch portion of the leg to allow the leg to move from the extended position to the retracted position, with the catch portion comprising an end face having a projection protruding from the upper end of the leg, and with the projection being attached to the lower end of the spring. 9. The cab as claimed in claim 8 with the latch further comprising a faceplate adapted to be fixed to an inner face of one of the plurality of partitions that has a compartment in which the spring is received; and a housing extending from the faceplate and having a longitudinal hole transverse to and in communication with the compartment, with the second end of the plunger extending through the longitudinal hole into the compartment, and with the handle being located outside the housing for manual operation.