Spiral advancing and retreating operation device, belt member for tubular telescopic body, and method for manufacturing belt member for tubular telescopic body
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHirofumi INOSHITA, Satoshi KOJIMA
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Abstract
The spiral advancing and retreating operation device forms a tubular telescopic body by spirally wrapping a first belt member and a second belt member disposed inside the first belt member around a common axis line in an overlapping manner in a state in which the first belt member and the second belt member are displaced from each other in a direction of the axis line, in which the first belt member includes a first row of engagement protrusions and a second row of engagement protrusions, the second belt member includes a first row of engagement parts and a second row of engagement parts.
Claims10
A spiral advancing and retreating operation device forming a tubular telescopic body by spirally wrapping a first belt member and a second belt member disposed inside the first belt member around a common axis line in an overlapping manner in a state in which the first belt member and the second belt member are displaced from each other in a direction of the axis line, wherein
- the first belt member comprises a first row of engagement protrusions and a second row of engagement protrusions formed of a plurality of engagement protrusions that are disposed in a longitudinal direction of the first belt member and are convex toward the axis line,
- the second belt member comprises a first row of engagement parts and a second row of engagement parts formed of a plurality of engagement parts disposed in a longitudinal direction of the second belt member,
- the engagement part is configured in such a way that the engagement protrusions can be detachably engaged therewith in a state in which the first belt member and the second belt member are spirally wrapped in the overlapping manner, and
- a part of the first belt member whose rigidity is higher than another surrounding part of the first belt member is curved into a cylindrical shape that corresponds to the tubular telescopic body in advance.
A belt member for a tubular telescopic body that is used as a first belt member or a second belt member of a spiral advancing and retreating operation device that forms the tubular telescopic body by spirally wrapping the first belt member and the second belt member disposed inside the first belt member around a common axis line in an overlapping manner in a state in which the first belt member and the second belt member are displaced from each other in a direction of the axis line, the belt member for the tubular telescopic body comprising:
- a first row of protrusions and a second row of protrusions formed of a plurality of protrusions that are disposed in a longitudinal direction of the belt member and are convex toward the axis line, wherein
- a part of the belt member whose rigidity is higher than another surrounding part of the belt member is curved into a cylindrical shape that corresponds to the tubular telescopic body in advance.
Dependencies are inferred from the claim text.