| 摘要 |
A guard to bar access to ladder rungs comprising a first and second rigid sheet pivoted together. The upper sheet has an upper hook to hang over a rung of the ladder. The lower (second) sheet has a joggle which enables a portion of it to pass behind a ladder rung and lock means to lock the second, lower, sheet to a rung whereby the first sheet and a portion of the second sheet bar access to the ladder rungs and the upper hook and the lock means prevent removal of the shield without first releasing the lock means.
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