US Patent No. 10,143,120

COMPONENT MOUNTER


Patent No. 10,143,120
Issue Date November 27, 2018
Title Component Mounter
Inventorship Takaki Fukami, Osaka (JP)
Hideaki Ohno, Osaka (JP)
Assignee PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)

Claim of US Patent No. 10,143,120

1. A component mounter provided with a component suction nozzle which uses a suction force which is generated by a negative pressure generation source to hold a component, the component mounter comprising:a nozzle shaft, on a bottom end of which the component suction nozzle is installed;
a nozzle shaft holder which includes a through-hole into which the nozzle shaft is inserted;
two bearings which are disposed in two locations separated vertically on an inner circumferential surface of the through-hole and which guide the nozzle shaft in a vertical direction;
a first flow path which is an air flow path formed inside the nozzle shaft, one end of the first flow path is an outer circumferential surface of the nozzle shaft and is open at a position interposed by the two bearings, and another end communicates with the component suction nozzle which is installed on a bottom end of the nozzle shaft;
a second flow path which is an air flow path formed inside the nozzle shaft holder, one end of the second flow path communicates with the negative pressure generation source, and another end is an inner circumferential surface of the through-hole and is open at a position which is interposed between the two bearings; and
a component suction nozzle lifting and lowering motor which causes the nozzle shaft to move vertically in relation to the nozzle shaft holder,
wherein, in each of the bearings:
two ring-shaped guide portions which surround an outer circumferential surface of the nozzle shaft to guide the nozzle shaft in the vertical direction are formed separated in the vertical direction,
a grease holder which has a larger inner diameter than the ring-shaped guide portion is formed between the two ring-shaped guide portions,
a space is surrounded by the outer circumferential surface of the nozzle shaft, the two ring-shaped guide portions, and the grease holder, and
the space is filled with grease.