| 摘要 |
An objective of the invention is to provide a multilayered flow passage member that enhances fluid measurement accuracy of an ultrasonic fluid measurement apparatus and an ultrasonic fluid measurement apparatus using the multilayered flow passage member. When fusible projections 20 are fused by a heating head 21 while partition plates 11 are inserted into side plates 13 and 14, a fused state provided by the heating head 21 changes according to either side of each of the partition plates 11, because fuse surfaces at leading ends of the respective fusible projections 20 are sloped in the vertical direction. An outermost end of each of fusible projections 25 that first contacts the heating head 21 is first fused. During a course of the fusible projections 25 being fused toward their roots, the partition plates 11 are pressed against ends of respective insert holes 17a that are on the opposite side of the outermost ends that are first fused. As a result, the partition plates 11 become one-sided with respect to the respective insert holes 17a and fixed by means of positional accuracy of the insert holes 17a. Even when clearance exists between the partition plates 11 and the insert holes 17a, the partition plates can be fused with superior accuracy. |
