AUXILIARY WHEELS, AND CARGO TRANSPORT WHEELBARROW OR BICYCLE HAVING THE SAME

To provide a cargo transport wheelbarrow having auxiliary wheels which, when an aged construction worker works at a construction site where there are irregularities on a ground surface, does not fall even if a wheel tilts.SOLUTION: When a wheel 50 rotatably held on a body frame tilts leftward or rig...

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Hauptverfasser: SUGIYAMA TAKASHI, HAYASHI YOSHINOBU, ONODA TAKAHIRO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a cargo transport wheelbarrow having auxiliary wheels which, when an aged construction worker works at a construction site where there are irregularities on a ground surface, does not fall even if a wheel tilts.SOLUTION: When a wheel 50 rotatably held on a body frame tilts leftward or rightward in an advancing direction, a pair of auxiliary wheels 101A and 101B limit the tilt of the wheel 50. The auxiliary wheels 101A and 101B include: first stationary link plates 31A and 31B which are fixed to the body frame, second stationary link plates 38A and 38B which rotatably hold auxiliary wheels 40A and 40B, respectively; pairs of parallel movable links 34A and 34B, and 35A and 35B which couple the first stationary link plates 31A and 31B and the second stationary link plates 38A and 38B, respectively; and energizing springs 36A and 36B which have one ends connected to the second stationary link plates 38A and 38B, have the other ends connected to the first stationary link plates 31A and 31B, and energize the auxiliary wheels 40A and 40B downward.SELECTED DRAWING: Figure 1 【課題】地面に凹凸がある工事現場等において、高齢建設作業者が作業するときに、車輪が傾いても荷物搬送用一輪車が転倒することのない補助輪を有する荷物搬送用一輪車等を提供すること。【解決手段】補助輪101A、101Bは、本体フレームに回転可能に保持される車輪50が、前進方向の左右に傾いたときに、車輪50の傾きを制限する一対の補助輪101A、101Bにおいて、本体フレームに固定される第1固定リンク板31A、31Bと、補助車輪40A、40Bを回転可能に保持する第2固定リンク板38A、38Bと、第1固定リンク板31A、31Bと第2固定リンク板38A、38Bとを連結する一対の平行可動リンク34A、34B、35A、35Bと、第2固定リンク板38A、38Bに一端が接続され、他端が第1固定リンク板31A、31Bに接続され、補助車輪40A、40Bを下方に付勢する付勢バネ36A、36Bを有する。【選択図】図1