PROBLEM TO BE SOLVED: To surely prevent such an inconvenience that the inclination of a control object member is changed in an opposite direction to a moving direction intended by an operator.SOLUTION: A controller in a horizontal control device acquires the operating direction of an inclination setting member when the inclination setting member is operated, and acquires an inclining direction in which the control object member is to be inclined by an actuator based on the relative position relationship between the actual inclination of the control object member in a state before the operation of the inclination setting member detected by an inclination sensor and a dead zone of reduced width based on a target inclination set according to a state after the operation of the inclination setting member, to determine whether the operating direction is the same as the inclining direction. When the operating direction is the same as the inclining direction, the controller permits a change to the reduced width of a dead zone width which is made when operating the inclination setting member, and when the operating direction is different from the inclining direction, the controller forbids a change to the reduced width of the dead zone width which is to be made when operating the inclination setting member, and maintains the dead zone width to a standard width.COPYRIGHT: (C)2013,JPO&INPIT【課題】オペレータが移動させたい方向とは反対方向に制御対象部材の傾きが変更されるという不都合を確実に防止する。【解決手段】水平制御装置において、制御装置は、傾き設定部材が操作されると、当該傾き設定部材の操作方向を把握すると共に、傾きセンサによって検出された前記傾き設定部材の操作前の状態における制御対象部材の実際の傾きと前記傾き設定部材の操作後の状態に応じて設定される目標傾きを基準とした縮小幅の不感帯との相対位置関係に基づいてアクチュエータによって前記制御対象部材が傾けられるべき傾斜方向を把握して、前記操作方向及び前記傾斜方向が同じか否かを判定し、前記操作方向及び前記傾斜方向が同じ場合には前記傾き設定部材の操作時に行う不感帯幅の縮小幅への変更を許容し、前記操作方向及び前記傾斜方向が異なる場合には前記傾き設定部材の操作時に行うべき不感帯幅の縮小幅への変更を禁止して不感帯幅を標準幅に維持する。【選択図】図5
