DIE CAM UNIT PROVIDED WITH AUXILIARY RETURN DEVICE

Title:

DIE CAM UNIT PROVIDED WITH AUXILIARY RETURN DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/159884

Kind Code:

A1

Abstract:

The present invention relates to a die cam unit provided with an auxiliary return device and, more particularly, to a die cam unit in which an auxiliary return device is further included in a cam slider and a cam driver to facilitate smooth return movement of the cam slider and thereby operation efficiency can be improved. The present invention is configured to include: a cam base (20) in which a slide part is formed in an installation space provided in a lower portion of a box-shaped body; a cam slider (30) positioned in the space part of the cam base (20), and having a return spring (32) therein and thus reciprocates along the sliding part; and a cam driver (40) having a slide plate (41) mounted on an upper surface thereof so that the cam slider (30) can be moved by guiding a lower slide groove (31) of the cam slider (30), wherein a pressing member (50) having a downwardly bent pressing surface (51) is installed on the bottom surface of the cam slider (30), and an auxiliary return device (60) is further included on a cam driver (40) side surface facing the pressing surface (51), the auxiliary return device (60) coming into contact with the pressing surface (51) as the cam slider (30) moves forward, and thereby becoming compressed to have an elastic restoring force. Also, a position fixing groove (33) is formed in the bottom surface of the cam slider (30), a position fixing protrusion (52) is provided on one surface of the pressing member (50) adhered to the bottom surface of the cam slider (30), an installation hole (42) is formed in the side surface of the cam driver (40) and the auxiliary return device (60) is inserted therein, and a separation preventing piece (43), which prevents the auxiliary return device (60) from being separated, is fixedly installed on an outer wall surface. In addition, the auxiliary return device (60) is achieved by comprising: a housing (61) having a through-hole (61a) formed in one side surface thereof, the housing (61) being open on the other side surface thereof; a pushing member (62) having, on one side thereof, a pushing surface (62a) positioned in the through-hole (61a) of the housing (61), the pushing member (62) being guided and moved along the inner space of the housing (61); a cover (63) for closing the other side surface of the housing (61); and an elastic member (64) positioned between the pushing member (62) and the cover (63).

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