Extendable arm structure
AssigneeFujimiy Aseisakusho Co., Ltd.
InventorNorimichi Matsuoka
Life of this patent
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Abstract
An extendable arm structure includes: an upper extendable arm and a lower extendable arm which extend parallel in a same direction; and a vertical coupling member that couples the upper and lower extendable arms. Each of the extendable arms includes a plurality of X-shaped cross units each formed by pivotally coupling two rigid members via a middle coupling shaft, and two end coupling shafts that pivotally couple ends of adjacent ones of the cross units. The extendable arm structure further includes: a planar member that closes, in a planar fashion, a space between the rigid member of the upper extendable arm and the rigid member of the lower extendable arm which extends parallel to the rigid member of the upper extendable arm in a same direction.
Claims9
An extendable arm structure, comprising:
- an upper extendable arm and a lower extendable arm which extend parallel in a same direction, each of the extendable arms comprises:
- a plurality of X-shaped cross units each formed by pivotally coupling a first extension member and a second extension member via a middle coupling shaft;
- and
- two end coupling shafts that pivotally couple ends of adjacent ones of the cross units;
- a plurality of vertical coupling members that couple the upper and lower extendable arms;
- and
- a plurality of planar members that close, in a planar fashion, a space between the second extension members of the upper extendable arm and the second extension members of the lower extendable arm,
- wherein each of the planar members connects an entire length of the second extension member of the upper extendable arm and an entire length of the second extension member of the lower extendable arm.
Dependencies are inferred from the claim text.