IMPACT ABSORBING MEMBER FOR VEHICLE

• Main Authors: INUI, HIROO, TAMADA, TERUO
• Format: Patent
• Language: English; French
• Published: 22.03.2011
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention provides an energy absorbing member for a vehicle having the excellent energy absorbing property, capable of preventing deterioration of the energy absorbing property in the case the stress by the impact is applied continuously so that the recessed ribs buckle in an energy absorbing member provided inside a vehicle structural member, without generation of the resin puddle in a blow molding step, or the like. The energy absorbing member for a vehicle I is a hollow product formed by blow molding of thermoplastics. It comprises a first wall 3 and a second wall 4 facing with each other, a plurality of pairs of recessed ribs comprising one side recessed rib 5 provided by denting the first wall toward the facing second wall and the other side recessed rib 6 provided by denting the second wall toward the facing first wall, and a welded surface with the top end parts of the one side recessed rib and the other side recessed rib welded and integrated, wherein the height of the one side recessed rib from the first wall to the welded surface is formed to 15.0 to 45.0 mm, the height of the other side recessed rib from the second wall to the welded surface is formed to 15.0 to 45.0 mm, and the interval between the first wall and the second wall of the energy absorbing member for a vehicle is provided by 30.0 to 90.0 mm on average. The energy absorbing member for a vehicle is made of a resin having large mechanical strength, including a polyolefin such as a polyethylene and a polypropylene, a styrene resin such as a polystyrene, and an ABS resin, a polyester resin such as a polyethylene terephthalate and a polyamide. L'invention concerne un corps creux absorbeur de chocs (1) destiné à un véhicule. Ledit corps est fabriqué par moulage par soufflage de résine thermoplastique et monté de manière interne sur des éléments constitutifs de véhicules afin d'empêcher que la capacité d'absorption des chocs des nervures creuses ne diminue par flambement et afin d'empêcher qu'une accumulation de résine ne survienne dans un procédé de moulage par soufflage. Ledit corps comprend des parois (3) et (4) opposées les unes aux autres, les parties d'extrémité de la pluralité de nervures creuses (5) et (6) formées par creusement des parois vers les autres parois opposées sont soudées les unes aux autres, la hauteur des nervures creuses depuis les parois jusqu'aux surfaces soudées (7) est comprise entre 15 et 45 mm et l'épaisseur de l'ensemble des nervures est comprise entre 30 et 90 mm, et des nervures de liaison permettant de relier les nervures creuses adjacentes les unes aux autres sont présentes afin de supporter les nervures creuses, l'accumulation de la résine pouvant ainsi être empêchée par utilisation de parties gonflées au niveau de parties des surfaces de soudure.