Air-blow work machine

摘要

A blower tube (4) to be connected to a power blower has a tube main body (42) having a distal end portion (42a) diminished in diameter toward its distal end and an attachment (44) to be coupled to the distal end (42a) of the tube main body (42) and including a distal end portion (44a) gradually diminished in diameter toward its distal end. Both these distal end portions (42a, 44a) are each provided three projections at distant position to protrude radially inward toward an axial line of the blower tube (4). The first projections (46) on the tube main body (42) and the second projections (48) on the attachment are positioned offset in phase to align in an alternate order. The blower tube (4) having the projections (46, 48) at the distal end portion can reduce the noise caused by ejection of a high-speed airflow.

主权项

1. A blower tube to be detachably coupled to an air-blow work machine which includes a blower main body housing an air blasting mechanism driven by a drive source, said blower tube, when coupled to the blower main body, receiving a high-speed airflow generated by the air blasting mechanism and releasing it externally, comprising:
a plurality of projections positioned at circumferential intervals on a distal end portion of said blower tube to protrude radially inward of said blower tube, wherein said projections include at least two sets of projections in which one set of projections are in a first stage located at a distal end portion of said blower tube and another set of projections are in a second stage distant from the first stage in the upstream direction with respect to the direction of the high-speed airflow in the blower tube.