BIFMA Furniture Testing Equipment Office Chair Seat Stability
Tester
Application
This machine is suitable to test the seats (such as chairs, office
chairs) forward stability. The purpose of these tests is to
evaluate the front and rear stability of chairs.
Principle
Put the test-piece on the test table, blocked the front leg, apply
specified force with forward 20N applied at seat loading point,
check the article tends to oventurn forward or not to determine the
test-piece forward stability performance.
Install the loading basket under the table which is lifting by
Pneumatic actuator, max loading capacity up to 150kg, the lift of
cylinder is controlled by pneumatic attenuation device,
Load-bearing basket adopt rubber cushioning device to ensure that
fall to final position will not produce damage, the operation unit
of table can control loading basket to rise or go down, dynamical
movement can position device adjustment, easy to operation.
Technical parameter
a.Support fixture
Material:polypropyene
Dimension:1.5±0.4m(T)×356mm(W)×711mm(L)
b.Rear stability disk
weight:10±0.05kg
Dimension:350mm(dia.)×48mm(T)
The surface friction of the disk (disk to disk):sliding force shall
be 31±9N
C.Template for real stability
Material:Nylon/3(thickness)×3(width)
weight:1.07±0.41kg
d.Front:stability loading disc:
Stability tests(ANSI/BIFMA X5.1-2017, clause 11)
Stability test(ANSI/BIFMA X5.4-2012, clause 21)
Loading basket can load the weights as bellows( loading basket
weight is 10kg)
4kg for each piece, 28pcs(100x100x50mm)
2kg for each piece, 10pcs(100x50x50mm)
1kg for each piece, 4pcs(100x50x25mm)
Weight: 600N increment
Specification
A 79 kg (173 lb.) weight shall be placed on the seat at the center
of the unit or on the
seating position nearest to the center of the chair
A block, obstruction or other restraining device 13 mm (0.5 in.) in
height shall be
affixed to the test platform. The device shall prevent sliding but
not restrict the unit
from tipping. On chairs that rotate, the base and casters shall be
positioned to offer
the least resistance to rearward tipping of the chair
Loader: diameter 200mm.
Seat height: 30 to 65cm, manual adjustment
Testing Standards
| ANSI/BIFMA X5.1-2011 12 | Stability Tests |
| BS EN 1355-3:2009 7.1.1 | Front edge overturning |
| BSEN 1355-3:2009.7.1.2 | Forwards overturning |
BIFMA Chair Stability Tester.pdf
