Document ID: chunk:federal_register_of_legislation:F2012C00357:front:0:p34
Version: federal_register_of_legislation:F2012C00357
Segment Type: other
Provision Reference: 
Character Range: 90520–93158

be attached to the manikin in Annex 7 to this Regulation as follows:  a board 25 mm thick shall be placed between the back of the manikin and the seat back.  The belt shall be firmly adjusted to the manikin.  The board shall then be removed so that the entire length of its back is in contact with the seat back.  A check shall be made to ensure that the mode of engagement of the two parts of the buckle entails no risk of reducing the reliability of locking.

           7.7.3. The free ends of the straps shall extend sufficiently far beyond the adjusting devices to allow for slip.

           7.7.4. The trolley shall then be so propelled that at the moment of impact its free running speed is 50 km/h + 1 km/h and the manikin remains stable.  The stopping distance of the trolley shall be 40 cm + 5 cm.  The trolley shall remain horizontal throughout deceleration.  The deceleration of the trolley shall be achieved by using the apparatus described in Annex 6 to this Regulation or any other device giving equivalent results.  This apparatus shall comply with the performance specified in Annex 8 to this Regulation.

           7.7.5. The trolley speed immediately before impact, the forward displacement of the manikin and the speed of the chest at a 300 mm displacement of the chest shall be measured.

           7.7.6. After impact, the belt assembly or restraint system and its rigid parts shall be inspected visually, without opening the buckle, to determine whether there has been any failure or breakage.  In the case of restraint systems it shall also be ascertained, after the test, whether the parts of the vehicle structure which are attached to the trolley have undergone any visible permanent deformation.  If there is any such deformation this shall be taken into account in any calculation made in accordance with paragraph 6.4.1.4.1.

           7.8. Buckle‑opening test

           7.8.1. For this test, belt assemblies or restraint devices which have already undergone the dynamic test in conformity with paragraph 7.7. above shall be used.

           7.8.2. The belt assembly shall be removed from the test trolley without the buckle being opened.  A load shall be applied to the buckle by direct traction via the straps tied to it so that all the straps are subjected to the force of  daN.  (It is understood that n is the number of straps linked to the buckle when it is in a locked position.)  In the case where the buckle is connected to a rigid part, the load shall be applied at the same angle as the one formed by the buckle and the rigid end during the dynamic test.  A load shall be applied at a speed