Patent ID: 8479365

Claim:
A syringe assembly device, that performs, in a process of assembling a barrel, a gasket within the barrel and a plunger rod to be combined with the gasket into a syringe, a step of screwing the plunger rod into the gasket, the syringe assembly device comprising: a barrel support device that supports the barrel rotationally about an axis of the barrel at a predetermined height with the axis being arranged vertically and an opening of the barrel through which the plunger rod is inserted being directed upward; a plunger rod support device that includes: a chuck which pinches the plunger rod and holds the plunger rod above the opening of the barrel with an axis of the plunger rod being arranged vertically; and a load application device which places a load on the plunger rod held by the chuck; and a rotation application device that rotates the barrel about the axis of the barrel, wherein the load application device places the load acting axially and downwardly on the plunger rod which is held by the chuck and whose end is inserted into the barrel, and, in this state, the load application device rotates the barrel in a direction in which the plunger rod is screwed into the gasket.