| 摘要 |
A REFLECTOR (5) HAVING A PLURALITY OF GROOVES (7) FORMED ON THE OUTER PERIPHERY AND EXTENDING IN THE AXIAL DIRECTION THEREOF AND IRREGULARITIES FORMED ON THE INNER PERIPHERY THEREOF TO PROVIDE SECURE ENGAGEMENT OF THE REFLECTOR (5) ON EACH CROSS PIECE (2) OF A LADDER. THE REFLECTORS (5) ARE EASILY ATTACHED TO EACH CROSS PIECE (2) AND CAN BE RELIABLY HELD THEREON THEREBY PREVENTING ACCIDENTS WHEN THE USER GOES UP OR DOWN THE LADDER. THE LADDER PROVIDED WITH THE REFLECTORS (5) INCLUDES A PAIR OF BEAMS (1), A PLURALITY OF CROSS PIECES (2) PROVIDED BETWEEN AND CONNECTING THE BEAMS (1), AND EACH CROSS PIECE (2) HAS A PLURALITY OF GROOVES PROVIDED ON THE OUTER PERIPHERY AND EXTENDING IN THE AXIAL DIRECTION THEREOF. A REFLECTOR (5) IS DISPOSED ON AT LEAST ONE END OF EACH CROSS PIECE (2) AT A CONNECTING PORTION BETWEEN THE CROSS PIECE (2) AND THE RESPECTIVE BEAM (1), AND EACH REFLECTOR (5) IS RING SHAPED AND HAS A PLURALITY OF IRREGULARITIES FORMED ON THE INNER PERIPHERY AT A SMALL DIAMETER PORTION THEREOF WHICH ENGAGE IN THE GROOVES OF THE RESPECTIVE CROSS PIECE (2). REFLECTOR (5) PORTIONS HAVING IRREGULARITIES ARE ALSO FORMED ON THE INNER PERIPHERY OF THE REFLECTOR (5) AT A LARGE DIAMETER PORTION THEREOF, AND A PLURALITY OF GROOVES ARE FORMED ON THE OUTER PERIPHERY AND EXTEND IN THE AXIAL DIRECTION THEREOF. (FIGURE 1)
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