INJECTION DEVICE

To provide an injection device capable of suppressing an occurrence of adhesive wear on a sliding surface between an outer diameter surface of a screw and an inner diameter surface of an injection plunger when the screw is rotated.SOLUTION: An injection device (1) of the present invention includes: a front support part (40) to which a plunger barrel (105) is fixed; an intermediate support part (60) which is provided so as to reciprocate in a front-rear direction on a rear side of the front support part (40) and to which a plunger (103) is fixed; and a rear support part (80) provided so as to reciprocate in the front-rear direction on the rear side of the intermediate support part (60) and rotatably supporting a screw (101). The rear support part (80) is supported by a frame (68) integrally provided on the intermediate support part (60) so as to reciprocate in the front-rear direction.SELECTED DRAWING: Figure 1 【課題】スクリュの回転時にスクリュの外径面と射出プランジャの内径面との間の摺動面に凝着摩耗が発生するのを抑えることのできる射出装置を提供すること。【解決手段】本発明の射出装置（１）は、プランジャバレル（１０５）が固定される前方支持部（４０）と、前方支持部（４０）より後方側において前後方向に往復移動可能に設けられ、プランジャ（１０３）が固定される中間支持部（６０）と、中間支持部（６０）の後方側において前後方向に往復移動可能に設けられ、スクリュ（１０１）が回転可能に支持される後方支持部（８０）と、を備える。後方支持部（８０）は、中間支持部（６０）に一体的に設けられる架台（６８）に、前後方向に往復移動可能に支持される。【選択図】図１