BIFMA X5.1 2011 椅子冲击测试标准

8Drop Test-Dynamic(See Figure8)
8.1Applicability
This test applies to all chair types.
8.2Purpose of Test
The purpose of this test is to evaluate the ability of the chair to withstand heavy and abusive
impact forces on the seat.
8.3Test Setup
a)The unit shall be placed on a test platform.
b)For chairs with a seat height adjustment feature,set the adjustment to its highest
position.For chairs with glides that adjust greater than50mm(2.0in),set them at13
mm(0.5in.)from their highest position.If other adjustable features are available,set
these adjustments at normal use conditions.Casters,if present,shall be initially placed
at the apparent worst-case position(typically at a position90degrees to the base leg).
Note:For chairs with lockable seat angles,the seat shall be tested in the unlocked
position.
c)A test bag containing sand and/or shot shall be attached to a device permitting a free fall
to the seating position as shown in Figure8.
d)The bag shall be centered side-to-side on the seat and shall be positioned 13mm(0.5
in.)±13mm(0.5in.)from the most forward surface of the backrest during free fall.The bag shall not contact the backrest during the free fall.
8.4Test Procedures
8.4.1Functional Load Test
a)A test bag weighing102kg(225lb.)shall be raised152mm(6in.)above the
uncompressed seat and released one time.(See Figure8).
b)Remove the bag.
c)For chairs with seat height adjustment features,set height to its lowest position and
repeat a)and b).,
8.4.2Proof Load Test
a)Repeat setup in8.3and increase the weight of the test bag to a proof load of 136kg
(300lb.).
b)The test bag shall be raised152mm(6in.)above the uncompressed seat and released
one time.(See Figure8).
c)Remove the bag.
d)For chairs with height adjustments,set seat height to its lowest position and repeat a)
through c).A second chair may be used for testing the chair in the lowest position
Note:If a second chair is used for the proof load test,it must also be subjected to the
functional load impact per Section8.4.1while in its lowest position.
8.5Acceptance Level
8.5.1Functional Load
There shall be no loss of serviceability.
8.5.2Proof Load
There shall be no sudden and major change in the structural integrity of the chair.Loss of
serviceability is acceptable.
ANSI/BIFMA X5.1-2011（General-Purpose Office Chairs-Tests
American National Standard for Office Furnishings）
8.1适用性
此测试针对各类型的椅子。

8.2测试目的
此测试的目的在于评估测试椅子承受重大外力冲击的能力。

8.3测试步骤
a)将椅子置于测试平台之上。

b)对于座垫高度可调节的椅子，将座垫调至最高点。

将其它功能调至正常使用条件。

如果有脚轮，应首先将其置于最差品情况条件（典型情况是脚轮与脚架腿成90度角时）。

c)应将附录A中的测试沙/砂袋或其它冲击力度相等的固定物连接在一种能让其自由下落于座垫上的装置之上参照图8）。

[1][2][3]
d)沙/砂袋的自由下落点应在座垫左右边的中轴线上，且距离椅背的最前表面不能超过13mm（0.5in），下落过程中沙/砂袋不能接触椅背。

8.4测试程序
8.4.1功能负荷测试
a)将一个直径约400mm（16in.）、重102公斤（225磅）的沙/砂袋悬于未被压缩的座垫上方152mm（6in.）处，然后让其自由下落一次（参照图8）。

b)移除沙/砂袋，按8.5.1来评估产品的接受等级。

c)对于座垫高度可调节的椅子，将座垫调至最低点，然后重复a）和b）。

8.4.2破坏性负荷测试
a)重复8.3的步骤，将测试沙/砂袋的重量增至136公斤（300磅）的破坏性负荷。

b)将沙/砂袋悬于未被压缩的座垫上方152mm（6in.）处，然后让其自由下落一次（参照图8）。

c)移除沙/砂袋，按8.5.2来评估产品的接受等级。

d)对于高度可调节的椅子，将其调至最低点，重复a）、b）、c）。

可能还需一张调至最低点的椅子来进行测试。

备注：如果第二张椅子用来进行破坏性测试，它必须首先被调至最低点，按8.4.1来进行功能负荷冲击测试。

8.5接受等级
8.5.1功能负荷
椅子不能丧失使用性。

8.5.2破坏性负荷
椅子的内在结构不能发生突然性重大的变化，可以接受其丧失使用性。