GAS SENSOR ASSEMBLING METHOD AND GAS SENSOR ASSEMBLING APPARATUS

摘要

A gas sensor assembling method includes a step for placing an element dummy such that it has a longitudinal direction in a vertical direction, wherein the cross-sectional shape of the dummy is similar to the cross-sectional shape of a sensor element, a step for fitting a through hole in an annularly-mounted member to the dummy from above vertically, wherein the through hole included in the annularly-mounted member corresponds to the cross-sectional shape of the sensor element, a step for fitting a tubular member to an outer periphery of the annularly-mounted member from above vertically, an step for placing the sensor element in contact with an upper end portion of the dummy on a single straight line, and an step for descending the dummy downwardly vertically for descending the sensor element and fitting the through hole in the annularly-mounted member to the sensor element.

主权项

1. A gas sensor assembling method comprising the steps of:
a) placing an element dummy having a shape similar to that of a sensor element such that it has a longitudinal direction in a vertical direction, said sensor element having an elongated shape mainly composed of a ceramic; b) fitting a through hole in an annularly-mounted member to said element dummy from above vertically, said annularly-mounted member having a disk shape or a cylindrical shape, and said through hole having a shape corresponding to a cross-sectional shape of said sensor element; c) fitting a tubular body to an outer periphery of said annularly-mounted member from above vertically; d) placing said sensor element in contact with an upper end portion of said element dummy on a single straight line; and e) descending said element dummy downwardly vertically for descending said sensor element and fitting said through hole in said annularly-mounted member to said sensor element.