US 12,240,744 B2
Lifter device
Syuji Aoyama, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Aug. 23, 2022, as Appl. No. 17/893,486.
Claims priority of application No. 2021-144200 (JP), filed on Sep. 3, 2021; and application No. 2022-112680 (JP), filed on Jul. 13, 2022.
Prior Publication US 2023/0074140 A1, Mar. 9, 2023
Int. Cl. B66F 9/20 (2006.01); B62B 3/02 (2006.01); B66F 9/075 (2006.01); B66F 9/24 (2006.01)
CPC B66F 9/205 (2013.01) [B62B 3/02 (2013.01); B66F 9/07509 (2013.01); B66F 9/24 (2013.01); B62B 2206/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A lifter device comprising:
a pole;
a lifting member configured to be guided by the pole;
a motor configured to generate power used for ascending and descending of the lifting member;
a transmission mechanism configured to transmit the power of the motor to the lifting member; and
a preventing member that is provided in the transmission mechanism and that is configured to prevent the descending of the lifting member when the power of the motor is not transmitted to the lifting member, wherein:
the transmission mechanism comprises:
a rotating body, which is disposed in an internal space of the pole and is configured to be rotated by the motor about a rotation axis, the rotation axis being perpendicular to a direction in which the lifting member ascends and descends;
a lifting pulley that is rotatably supported by the lifting member; and
a wire that connects the rotating body to the lifting pulley,
the rotating body is configured to wind and unwind the wire, so that the lifting member ascends and descends, and
the preventing member comprises a one-way bearing, which is disposed coaxially with the rotating body and is configured to be locked when the power is not transmitted.