Patent ID: 8899650

Claim:
A board conveying hand comprising a fork and an adsorbent provided in the fork, for adsorbing a board, in which the board is adsorptively held by the adsorbent and conveyed, wherein the adsorbent includes: a pad for adsorbing the board when the pad is in contact with the board; and an elastic member interposed between the fork and the pad and provided with an adsorption passage for allowing an adsorbing fluid to pass between the fork and the pad, wherein a projection amount of the pad from the fork is configured to be varied, wherein the elastic member includes: an adsorption passage clearance communicating with the adsorption passage; and a projection amount adjustment clearance independent of the adsorption passage clearance along a direction of a plane parallel to the fork, wherein the fork includes: a first passage and a second passage, which are passages of the adsorbing fluid; the first passage and the second passage being configured to freely suck the adsorbing fluid independently of each other; and one of the first passage and the second passage communicating with the adsorption passage clearance, and the other of the first passage and the second passage communicating with the projection amount adjustment clearance, wherein the elastic member includes: a pad supporter which supports the pad and has the adsorption passage formed therein; a first annular leg that is formed at the pad supporter and defines the adsorption passage clearance between the pad supporter and the fork; and a second annular leg that is formed at the pad supporter and defines the projection amount adjustment clearance between the pad supporter and the fork, and wherein, when the adsorbing fluid inside of the projection amount adjustment clearance is sucked out from the projection amount adjustment clearance, the first annular leg and the second annular leg are deformed to reduce the adsorption passage clearance and the projection amount adjustment clearance, thus varying the projection amount.