To specify a failure portion when abnormality is detected in control of a rotation number of a mixer drum.SOLUTION: A concrete mixer truck 1 includes: a drive device 4 which rotationally drives a mixer drum 2; a driving state detectors 5c, 10b which detect a driving state of the drive device 4; a rotation sensor 6a serving as a drum rotation detector which detects a rotation number of the mixer drum 2; and a controller 20 which outputs a drive command value to the drive device 4 so that the rotation number of the mixer drum 2 becomes a target rotation number. The controller 20 has an abnormality determination part 21 which determines an abnormal portion based on the drive command value, a detection value of the rotation sensor 6a, and detection values of the driving state detectors 5c, 10b in a case that a difference between the rotation number of the mixer drum 2 and the target rotation number is larger than or equal to a predetermined reference value.SELECTED DRAWING: Figure 2

    【課題】ミキサドラムの回転数制御に異常が検出された際に故障部位を特定する。【解決手段】ミキサ車1は、ミキサドラム2を回転駆動する駆動装置4と、駆動装置4の駆動状態を検出する駆動状態検出器5c,10bと、ミキサドラム2の回転数を検出するドラム回転検出器としての回転センサ6aと、ミキサドラム2の回転数が目標回転数となるように、駆動装置4へ駆動指令値を出力するコントローラ20と、を備える。コントローラ20は、ミキサドラム2の回転数と目標回転数との差が所定の基準値以上である場合に、駆動指令値と回転センサ6aの検出値と駆動状態検出器5c,10bの検出値とに基づいて異常箇所を判定する異常判定部21を有する。【選択図】図2


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    Title :

    CONCRETE MIXER TRUCK


    Additional title:

    ミキサ車


    Contributors:

    Publication date :

    2020-06-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS / B28C Tonaufbereitung , PREPARING CLAY



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