Abstract: A vehicle body front structure including: a bumper beam; side member; and crash-box including a polygonal-tubular-body, the crash-box between the bumper beam end and side member with the tubular body parallel axis to the vehicle front-rear direction, wherein the crash-box absorbs impact energy as the tubular body is collapsed under compressive load applied from the bumper beam. The polygonal-tubular-body includes outer and inner sidewalls, wherein the outer and inner sidewalls are inclined laterally outwardly in the vehicle as they approach the bumper beam, wherein the outer sidewall inclination angle with respect to the vehicle front-rear direction is greater than the inner sidewall inclination angle. The bumper beam has at the end a first portion whose front side surface is perpendicular to the vehicle front-rear direction, extending from the terminal of the beam inwardly at least to the same lateral location as the laterally outer side of the side member.

Abstract: In order to improve operation efficiency, there is provided a method for assembling two assemblies together through a rotating medium, in which all the processes are automated except for fitting engagement of the spline portions. The method comprises a first manual operational step and a second automatic operational step. The first manual operational step includes a process for connecting a first rotating shaft member of a first assembly and the rotating medium while adjusting phases thereof. The second step includes a process for fitting a plurality of split knock-pins provided on the rotating medium into corresponding fitting holes of a second rotating shaft member of a second assembly, and thereafter spreading the front end of each split knock-pin so as to fix the rotating medium to the second rotating shaft, and assembling the first assembly with the second assembly.

Abstract: When a valve 10 is opened, a locking ball 8 moves upward with respect to a rocker arm 3 and the locking ball is located between the rocker arm 3 and a push rod 5. The push rod 5 moves downward integral with the rocker arm 3 in a condition the push rod 5 is locked. When a valve 10 is closed, the locking ball 8 moves downward with respect to the rocker arm 3 and the push rod 5 is placed in unlocked condition. A retaining member 3A in the rocker arm 3 contacts the circlip 9 and the push rod 5 moves upward. By this construction, it becomes possible to eliminate adjustment work of tappet clearances and also unfavorable conditions caused by adjustment work of tappet clearances.