Document ID: chunk:federal_register_of_legislation:F2019C00042:front:0:p53
Version: federal_register_of_legislation:F2019C00042
Segment Type: other
Provision Reference: 
Character Range: 144197–146873

follower of which is attached by wires to a small trolley mounted on a track. The cam design and motor speed combination is such as to give the required acceleration at a rate of increase of acceleration as specified in paragraph 7.6.2.2. of this Regulation and the stroke is arranged to be in excess of the maximum permitted webbing movement before locking.

On the trolley a carrier is mounted which can be swivelled to enable the retractor to be mounted in varying positions relative to the direction of movement of the trolley.

When testing retractors for sensitivity to strap movement the retractor is mounted on a suitable fixed bracket and the strap is attached to the trolley.

When carrying out the above tests any brackets, etc. supplied by the manufacturer or his accredited representative shall be incorporated in the test installation to simulate as closely as possible the intended installation in a vehicle.

Any additional brackets, etc. that may be required to simulate the installation as intended in the vehicle shall be provided by the manufacturer or his accredited representative.

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Annex 5

DIAGRAM OF AN APPARATUS FOR DUST‑RESISTANCE TEST

(dimensions in millimetres)

Annex 6

DESCRIPTION OF TROLLEY, SEAT, ANCHORAGES
AND STOPPING DEVICE

         1. TROLLEY

          For tests on safety‑belts the trolley, carrying the seat only, shall have a mass of
         400 + 20 kg. For tests on restraint systems the trolley with the attached vehicle structure shall have a mass of 800 kg. However, if necessary, the total mass of the trolley and vehicle structure may be increased by increments of 200 kg. In no case shall the total mass differ from the nominal value by more than + 40 kg.

         2. SEAT

          Except in the case of tests on restraint systems, the seat shall be of rigid construction and present a smooth surface. The particulars given in figure 1 to this annex shall be respected, care being taken that no metal part can come into contact with the belt.

         3. ANCHORAGES

         3.1. In the case of a belt equipped with a belt adjustment device for height as defined in paragraph 29.6. of this Regulation, this device shall be secured either to a rigid frame, or to a part of the vehicle on which it is normally mounted which shall be securely fixed on the test trolley.

         3.2. The anchorages shall be positioned as shown in figure 1. The marks which correspond to the arrangement of the anchorages show where the ends of the belt are to be connected to the trolley or to the load transducer, as the case may be. The anchorages for normal use are the points A, B and K if the strap length between the