| 摘要 |
PROBLEM TO BE SOLVED: To measure vertical load and longitudinal load accurately and easily by mounting a vertical load sensor in a sensor mounting hole formed on the center side of a coupler, and mounting a longitudinal load sensor in a sensor mounting hole formed on the outside of the coupler. SOLUTION: A coupler comprises a coupler base and a coupler bracket 3. The coupler base is supported by a pair of coupler brackets 3 fixed to a tractor. Sensor mounting holes are formed on both sides of the side face center lower part of each coupler bracket 3. A vertical load sensor 11 is embedded in the sensor mounting hole formed on the center side of the coupler, and a longitudinal load sensor 12 is embedded in the sensor mounting hole formed on the outside of the coupler. When the tractor turns, load applied in a horizontal direction becomes larger toward the outside of the coupler, so that the longitudinal load sensor 12 is embedded on the outside of the vertical load sensor 11 so as to positively measure load applied in a longitudinal direction.
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