Patent ID: 9046434
Filing Date: 2015-06-02
Classification: G01G,G01L

Abstract:
1. A load cell which is Roberval-type load cell, comprising: an upper beam section extending horizontally; a lower beam section extending below the upper beam section in parallel with the upper beam section; a fastening section which connects one end of the upper beam section and one end of the lower beam section to each other and is fastened to a stationary object; a movable section which connects the other end of the upper beam section and the other end of the lower beam section to each other and is displaced vertically by a load applied vertically to the movable section; and a cylindrical stopper member having a circular cross-section; wherein the fastening section has a first circular hole having a circular cross-section, and wherein the first circular hole is a through-hole and penetrates the fastening section; wherein the movable section has a second circular hole having a circular cross-section, and wherein the second circular hole is a through-hole and penetrates the movable section, and further wherein the second circular hole is concentric with the first circular hole; wherein a base end portion of the stopper member is fitted into and fastened to the first circular hole and a tip end portion of the stopper member is located at an inner side of the second circular hole such that there is a space of a specified width between the tip end portion and an inner surface of the second circular hole and wherein the upper beam section, the lower beam section, the fastening section and the movable section form a parallelogram, and wherein the lower beam section and the upper beam section are parallel to the stopper member, and wherein the upper beam section and the lower beam section are parallel to a center axis of the first circular hole and the second circular hole.