| 摘要 |
A ladder is provided which has considerably reduced tendency to slip. Typically, the ladder 1 has rungs 5 and side members 2 with end caps 3 resting on the ground 4. Securing member 6, made typically from aluminium alloy, has friction member 7 provided with spikes 16. Pivot member 8 on the securing member 6 is fixed at one end on the securing member to opposite sides of the securing member, and at the other end is mounted through bolt 9 to the side member of the ladder. Flat spring 17 is fitted around the bolts 9, the spring being biassed to bring the securing member 6 against the side member 2. The pivot member is arcuate in shape to allow the securing member, when not in use to be positioned essentially flat against the ladder and not proud of the lower end of the side member. In use, the ladder is placed on the ground and against a wall. The securing member is pivoted against the bias of spring 17 so as to place it on the ground. To provide necessary latching, stay 10, freely swingable about bolt 13, is located in an appropriate notch 18 in the securing member. After use, the ladder is moved away from the wall, the securing means moved a little distance against the spring bias to release the stays from the notch, the securing means is allowed to move back to the ladder using the bias of the spring 17, at the same time trapping the stays against the side members.
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