ch makes it possible for the handicapped to carry out work by use of the wheelchair. However, in accordance with the conventional wheelchair, the user of the wheelchair can do the work only in the seated posture but cannot do work which can be done only in a stand-up posture because his or her hands cannot reach a high position.РWheelchairs using an external power source (such as motor drive using a battery as the power source) for a stand-up mechanism have been proposed in recent years for a wheelchair which enables the user to do a work in a stand-up posture. However, the wheelchairs of this kind involve the drawbacks that the charging work and maintenance plicated, that the weight of the wheelchair increases and that the wheelchair itself is extremely expensive with limited versatility.
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