Applicability of this test
for each type of chair with rotary type seat cushion.
Test purpose the purpose of this test is to evaluate the chair from the repeated rotation caused by pressure and wear ability.
Test steps a)
Will chair placed in test platform, the seat cushion and platform will not be able to rotate.
Figure 9 indicated an acceptable way of chair fixed.
For seat height adjustable chair, seat cushion should be set to high.
Other functions will be dispatched to normal conditions of use.
The seat cushion to 102 kg (
The load, the load center of gravity should be the center of the pad axis here 51 - ahead
See figure 9)
In the 360 ° plus or minus 10 ° rotation range of frequency meter to adjust the Angle of rotation.
If can use the rotation of the range is less than 360 °, deal with the rotation of the test machine to the corresponding adjustment range, so that the rotating machinery just hit but not covering the rotation starting point.
Rotation is unidirectional and bidirectional.
For seat cushion rotation range of 360 ° chair, one is a complete rotation cycle;
For seat cushion rotation range is less than 360 ° chair, one is from a starting point to another check point of a spin cycle.
A) test program
With 5 - per minute
15 the proper frequency will cushion or platform rotate it 60000 times.
If seat height can be adjusted, to its lowest point.
The chair again 60000 times the rotation of the test, to test total number of 120000 times.
Record test results.
On the whole accept grade chair can't lose.
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