Fatigue Test Apparatus for Back of Chair

The present invention secure the chair to the fixture base and, on the fatigue test device of the back seat for delivering repetitive force to the backrest part to execute a fatigue test of the back portion of the chair, the repetitive force to the backrest (10) parts delivery to, a pneumatic device (210) to reciprocate a piston provided inside and; The backrest 10 is in close contact with the part, is connected to the piston of the pneumatic device 210, the adapter 214 which reciprocates the piston and integral with; The pneumatic device 210 is coupled integrally to the upper side, the jig fixture pawl 220 supported on the base 230; And a jig is bonded by the fastening means on the underside of the pawl 220, the jig is characterized in that it comprises a pawl guide portion 221 is integrally fixed to the base 230. Accordingly, the fatigue test device of the back seat of the present invention is space combined in a jig pole pneumatic device for transmitting a force to the back seat and the jig pole is thereby more firmly installed on jig base, narrow in a simplified configuration as compared with the conventional easily it has the advantage that the fatigue test of the back seat in the running. In addition, the present invention is even, due to the reciprocating tilting the backrest portion of the chair, of the pneumatic device power to the back part by a fitted rotatably to the adapter bearing can be uniformly transferred to the horizontal advantage that the pneumatic device .