| 摘要 |
A ladder comprises two uprights (1) and rungs (2) attached between same. It is characterised in that the uprights (1) have, for attachment of the rung (2), a recess (3) on their edge where a lug (5) is threadedly attached. The lug has a protrusion (8) on its inner edge, which matches said recess (3). On the lug (5) of which the rung (2) rests and it is held up by its end, by way of the threading of a tubular finish (9) of said end on the lug (5). Between the lug (5) arid the tubular finish (9), support (10) arid anchorage (11,12) components have been provided, which ensure the attachment.
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