ASTM F851-87(2005)

Standard Test Method for Self-Rising Seat Mechanisms

SIGNIFICANCE AND USE
This test method provides the criteria for a practical, reproducible test for assuring the proper life-cycle of self-rising or automatic-lifting seat mechanisms of chairs.
This test method should be considered suitable for the testing required for design purposes, manufacturing control, service evaluation, specification acceptance, and regulatory statutes.
SCOPE
1.1 This test method evaluates the performance of self-rising or automatic-lifting seat mechanisms of chairs in places of assembly.
1.2 This test method addresses only the raising of the seat. It does not address the load that may be placed on that seat. Committee F15 is considering a standard addressing this load.
1.3 The values as stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Jun-2005
• ICS: 43.040.60 - Bodies and body components
• Technical Committee: F15 - Consumer Products
• Drafting Committee: F15.23 - Auditorium Seating

Relations

• Replaces: ASTM F851-87(2000) - Standard Test Method for Self-Rising Seat Mechanisms
• Effective Date: 01-Jul-2005
• Replaced By: ASTM F851-87(2013) - Standard Test Method for Self-Rising Seat Mechanisms
• Effective Date: 01-Apr-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F851 − 87 (Reapproved2005)
Standard Test Method for
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Self-Rising Seat Mechanisms
ThisstandardisissuedunderthefixeddesignationF851;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 This test method should be considered suitable for the
testing required for design purposes, manufacturing control,
1.1 This test method evaluates the performance of self-
service evaluation, specification acceptance, and regulatory
rising or automatic-lifting seat mechanisms of chairs in places
statutes.
of assembly.
1.2 This test method addresses only the raising of the seat.
4. Apparatus
It does not address the load that may be placed on that seat.
4.1 A representative apparatus capable of performing this
Committee F15 is considering a standard addressing this load.
test is shown in Figs. 1 and 2. This unit consists of a
1.3 The values as stated in inch-pound units are to be
motor-powered rotating arm with adjustable length and two
regarded as the standard. The values in parentheses are
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3 ⁄2-in. (88.9 mm) roller wheels fastened to the end of the arm.
provided for information only.
4.2 Other suitable apparatus may be used.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Sampling
responsibility of the user of this standard to establish appro-
5.1 Test Specimen—Each test specimen shall consist of a
priate safety and health practices and determine the applica-
self-rising seat mechanism contained in a single chair.
bility of regulatory limitations prior to use.
5.2 Sample Size—The sample size shall consist of three test
2. Summary of Test Method
specimens selected at random from a standard production run
(see Appendix X1.1). All components of the test specimens
2.1 The principle of the test method is to test the reliability
of the seat-lifting mechanism. must be manufactured using that manufacturer’s standard
materials, methods, and design.
2.2 This test method consists of using hard rubber rollers
attached dually to the end of an actuating bar to lower the seat.
6. Specimen Preparation
Theseatisthenreleasedandallowedtoliftautomaticallytothe
“at-rest” or “raised” position. The test method requires the seat 6.1 Assemble and mount the test specimen to simulate
installation conditions, following manufacturer’s assembly in-
to be cycled at a specified rate, and allows for the number of
cycles completed, without failure, to be measured. structions. Record dimensional position of seat in “raised”
position relative to the back of the chair (see Fig. 3).
2.3 The “at-rest” position for an auditorium chair is the
“raised” position. The seat is lowered to allow the occupant to
7. Procedure
be seated. When released, the seat is automatically returned to
the “raised” position by use of a spring return mechanism or 7.1 Design the apparatus to lower the seat to its complete
counter-weight for gravity lift (see Figs. 1 and 2).
“down” position.
7.2 The apparatus then releases the seat. This allows the
3. Significance and Use
seat-lifting mechanism to function, returning the seat to the
3.1 This test method provides the criteria for a practical,
“at-rest” or “raised” position, completing one cycle.
reproducibletestforassuringtheproperlife-cycleofself-rising
7.3 Continue for 100 000 cycles to be completed within a
or automatic-lifting seat mechanisms of chairs.
period not to exceed 14 calendar days (see Appendix X1.2).
7.4 The seat-lifting mechanism passes the test if the three
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specimens meet the following conditions:
This test method is under the jurisdiction of ASTM Committee F15 on
Consumer Products and is the direct responsibility of Subcommittee F15.23 on
7.4.1 Completion of 100 000 cycles without failure. To
Auditorium Seating.
return to raised position see Appendix X1.3.
Current edition approved July 1, 2005. Published July 2005. Originally approved
7.4.2 Dimensional deviation of front of seat shall not exceed
in 1983. Last previous edition approved in 2000 as F851 – 87 (2000). DOI:
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10.1520/F0851-87R05. 1 ⁄2 in. (38.1 mm).
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F851 − 87 (2005)
FIG. 1 Self-Rising Seat Mechanism Apparatus (Down Position)
FIG. 3 Diagram of Self-Rising Seat Mechanism
8.1.1 Chair manufacturer’s name,
8.1.2 Chair model or series number or name, or both,
8.1.3 Dates of testing,
8.1.4 Brief description of testing apparatus and method,
8.1.5 Brief description of chair assembly tested, and
8.1.6 Number of cy
...