Abstract: Errors in work in a bolt or nut tightening process are reduced to an extremely low level. Further, the process of the work is accurately recorded and quality of production processes is improved. A production management device receives information on a production instruction from a superordinate device, optically displays, according to the information, a socket to be selected for work to tighten a bolt or a nut, automatically recognizes a nut taken out from a socket holder, and alarms when the recognized socket and the displayed socket do not agree.

Abstract: Rather than simply changing a component or module to be installed, a conveyance speed of a conveyance means for conveying a workpiece is modified in response to the specifications of a product when a product with specifications modified in part from common specifications of mass produced products is added to the mass produced products. Furthermore, a condition wherein the speed of the conveyance means is modified in accordance with specifications is displayed in real time such that a worker can identify the condition.

Abstract: Errors in work in a bolt or nut tightening process are reduced to an extremely low level. Further, the process of the work is accurately recorded and quality of production processes is improved. A production management device receives information on a production instruction from a superordinate device, optically displays, according to the information, a socket to be selected for work to tighten a bolt or a nut, automatically recognizes a nut taken out from a socket holder, and alarms when the recognized socket and the displayed socket do not agree.

Abstract: Supplying work for many parts supplied for vehicle assembly is progressed toward one radiation center, and the supplied parts are assembled into one vehicle on a rotary-type assembly bed provided at the radiation center.

Abstract: An axle module is obtained by coupling an axle member and a pair of leaf springs in the same vertical relationship as in the actual state of use. At such time, when the axle member is disposed on a work stand, pins passing through holes provided in the right and left leaf springs for mounting to a vehicle body are inserted prior to tightening U-bolts used to mount the leaf springs. In addition, by applying a small force, the axle member can be moved in-plane within a predetermined range relative to the leaf springs. Furthermore, the tightening of nuts is carried out by moving tightening tools disposed on a carriage to a position underneath the tips of the U-bolts subject to tightening and then raising and rotating sockets installed in the tightening tools.

Abstract: Rather than simply changing a component or module to be installed, a conveyance speed of a conveyance means for conveying a workpiece is modified in response to the specifications of a product when a product with specifications modified in part from common specifications of mass produced products is added to the mass produced products. Furthermore, a condition wherein the speed of the conveyance means is modified in accordance with specifications is displayed in real time such that a worker can identify the condition.

Abstract: A structure conveying an article undergoing an assembly operation by conveyor and providing a module or a component from a module supply area provided along that conveyor to a position of the article undergoing conveyance using a crane, wherein supply of the module or the component is performed in a rational manner. A motion direction and a speed of a hoist carrying a module or an article in a space above the conveyor are synchronized with a motion direction and a speed of the article being conveyed by the conveyor. Specifically, a rail from which the hoist is suspended and disposed over the conveyor has a movable construction, and using a motion of this rail and a motion of the hoist, the motion direction and speed of the hoist is synchronized with the motion direction and speed of the article.

Abstract: Mounting of an axle module to a chassis frame is carried out in vertically normal orientation (not in an inverted state). In the process, no heavy-duty equipment or steps are required to hoist chassis frames in the air and turn them upside down. The ceiling space above production lines is reduced. A method and a device are provided for mounting axle modules that are suitable for supplying to a rotary assembly stand. An axle module is transported to a first support stand in normal orientation and a chassis frame is transported to a second support stand also in normal orientation. By lifting the first support stand its mounting ends are aligned with the mounting brackets of the chassis frame. Cylinder means and hovering means are used for lifting.

Abstract: Supplying work for many parts supplied for vehicle assembly is progressed toward one radiation center, and the supplied parts are assembled into one vehicle on a rotary-type assembly bed provided at the radiation center.