Gripper

Abstract

A gripper, which comprises: a cylindrical main-body having a valve-rod set inside; and a plurality of gripping-jaws are pivotally set on the bottom of the valve rod which is opposite to the bottom side of the cylindrical main-body; wherein the gripping-jaws can be synchronously folded and expanded when the valve-rod is moved up and down in the cylindrical main-body; wherein each end of the gripping-jaws is pivotally connected with a gripping-piece via an axial-rod, so that the gripping-piece can rotate upwards or downwards using the axial-rod as a fulcrum; wherein a gripping-plane having a slippery-stopping effect is set on the inner side of the gripping-piece.

I claim: 
     
         1 . A gripper, which comprises:
 a cylindrical main-body having a valve-rod set inside; and   a plurality of gripping-jaws are pivotally set on the bottom of the valve rod which is opposite to the bottom side of the cylindrical main-body;   wherein the gripping-jaws can be synchronously folded and expanded when the valve-rod is moved up and down in the cylindrical main-body;   wherein each end of the gripping-jaws is pivotally connected with a gripping-piece via an axial-rod, so that the gripping-piece can rotate upwards or downwards using the axial-rod as a fulcrum;   wherein a gripping-plane having a slippery-stopping effect is set on the inner side of the gripping-piece.   
     
     
         2 . The gripper according to  claim 1 , wherein the shape of the gripping-plane of the gripping-piece is arced and curved. 
     
     
         3 . The gripper according to  claim 1 , wherein the gripping-piece is made of a non-slip material.