Tensioner

Abstract

PURPOSE: To eliminate a need for an adjusting means by making up a device out of a base section furnished with a sliding member which is fitted onto a driving shaft or a driven shaft with friction force, an arm which extends along the tensed/slackened running line of an endless continuous string from the base section, and of a contact surface member which is fixed onto the arm while being brought in contact with the tensed/slackened running line of the endless continuous string. CONSTITUTION: A contact surface member 11 fixed onto an arm which is mounted on a driving shaft 2 fixed onto a base section 9 furnished with a sliding member 12, includes an abutting surface 11A over the tensed/slackened running line S of an endless continuous string 6 wherein the aforesaid surface comes in contact with an outward surface which is positioned to the side opposite to an inward surface facing to a power running line T. In this case, the contact surface member 11 comes in contact with the outward surface of the endless continuous string 6, the endless continuous string 6 is recessed toward the power running line T in point of the tensed/slackened running line S by means of abutting and pressing. This thereby causes the winding angles of the endless continuous string 6 toward a driving rotor 3 and a driven rotor 5 to be increased by means of pressing the contact surface member 11, thereby increasing transmitting force between the driving and driven rotors 3 and 5 so that the transmitting efficiency is enhanced. COPYRIGHT: (C)1991,JPO&Japio

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