ISO 9221-2:2015

Furniture — Children's high chairs — Part 2: Test methods

ISO 9221-2:2015 specifies test methods for the assessment of the requirements of children's high chairs.

Ameublement — Chaises hautes pour enfants — Partie 2: Méthodes d'essai

General Information

• Status: Published
• Publication Date: 02-Nov-2015
• ICS: 97.140 - Furniture
• Technical Committee: ISO/TC 136 - Furniture
• Drafting Committee: ISO/TC 136 - Furniture
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 12-Mar-2021

Relations

• Revises: ISO 9221-2:1992 - Furniture — Children's high chairs — Part 2: Test methods
• Effective Date: 14-Jun-2014

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 9221-2
Second edition
2015-11-01
Furniture — Children’s high chairs —
Part 2:
Test methods
Ameublement — Chaises hautes pour enfants —
Partie 2: Méthodes d’essai
Reference number
ISO 9221-2:2015(E)
©
ISO 2015

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ISO 9221-2:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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CH-1214 Vernier, Geneva, Switzerland
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www.iso.org
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ISO 9221-2:2015(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions . 2
4.1 Preliminary preparation . 2
4.2 Determination of the junction line . 2
4.3 Test sequence . 3
4.4 Tolerances . 4
5 Test equipment. 4
5.1 General . 4
5.2 Test dummy . 4
5.3 Impact hammer . 5
5.4 Loading pad . 6
5.5 Small loading pad. 6
5.6 Stops . 7
5.7 Floor surface . 7
5.8 Beams . 7
5.8.1 Beam for stability test and for measurement of the lateral protection length . 7
5.8.2 Beam for height of lateral protection test . 7
5.9 Slide gauges . 7
5.10 Force-measuring device . 8
5.11 Test load . 8
5.12 Small parts cylinder . 8
5.13 Small torso probe . 9
5.14 Device for measuring the angle, the length and the height of the backrest and the
height of the lateral protection .10
5.15 Leg probe .11
5.16 Wedge block .11
6 Test procedures .12
6.1 General .12
6.2 Impact test .12
6.3 Durability of the locking mechanism .13
6.4 Strength of the locking mechanism .13
6.5 Small parts .13
6.6 Openings .14
6.6.1 Openings between moving parts .14
6.6.2 Other openings .14
6.7 Strength of harness/belt attachment points .14
6.8 Strength of components of the restraint system .14
6.9 Slippage of straps of the restraint system .14
6.10 Backrest tests .15
6.10.1 Determination of backrest angle .15
6.10.2 Determination of backrest height .15
6.10.3 Determination of length of reclinable backrest .15
6.10.4 Strength of reclinable backrest mechanism .15
6.11 Seat vertical static load test .15
6.12 Footrest vertical static load test .15
6.13 Lateral protection measurements .16
6.13.1 Determination of lateral protection height .16
6.13.2 Determination of lateral protection length .16
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6.14 Leg openings test .18
6.14.1 Wedge block test .18
6.14.2 Gaps between leg openings .18
6.15 Measurement of the distance between the backrest and the crotch restraint .18
6.16 Measurement of the distance between the backrest and the horizontal member .19
6.17 Stability tests .19
6.17.1 General.19
6.17.2 Positioning .19
6.17.3 Sideways stability . . .20
6.17.4 Rearwards stability . .20
6.17.5 Forwards stability .21
6.17.6 Footrest and horizontal frame member stability.22
6.18 Tray tests .23
6.18.1 Tray strength test .23
6.18.2 Tray vertical static load test and stability .23
6.18.3 Tray drop test .24
7 Test report .24
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 136, Furniture.
This second edition cancels and replaces the first edition (ISO 9221-2:1992), which has been
technically revised.
ISO 9221 consists of the following parts, under the general title Furniture — Children’s high chairs:
— Part 1: Safety requirements
— Part 2: Test methods
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Introduction
This part of ISO 9221 has been prepared in order to specify test methods to provide assurance that
children’s high chairs comply with the requirements in ISO 9221-1.
The tests are designed to evaluate properties without regard to materials, design/construction, or
manufacturing processes.
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INTERNATIONAL STANDARD ISO 9221-2:2015(E)
Furniture — Children’s high chairs —
Part 2:
Test methods
1 Scope
This part of ISO 9221 specifies test methods for the assessment of the requirements of children’s high
chairs.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 7619-2, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 2: IRHD
pocket meter method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
children’s high chair
free standing chair that elevates the child to approximately dining table height, intended for holding the
child from 6 months to 36 months of age who is capable of remaining in a sitting position due to his or
her own coordination
3.2
crotch restraint
strap or bar passing between the legs of the child which prevents the child from slipping forward out of
the high chair
3.3
integral harness
assembly intended to retain the child in the high chair comprising either a crotch restraint, waist strap
and shoulder straps or comprising straps that pass over the child’s shoulders and between the child’s legs
3.4
waist belt
strap, which when fastened, fully surrounds the child’s waist
3.5
waist strap
strap, which when fastened, goes from one side of the child to the other passing in front of the child’s waist
3.6
opening
space between structural members or components
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3.7
shear and squeeze points
gaps which can cause harm to parts of the body and which occur when two parts close together or open
during relative movements
3.8
locking device
device which is mounted on a frame and which will maintain parts of the frame in position of use
3.9
locking mechanism
mechanism composed by a locking device and one or more operating devices
Note 1 to entry: An action deactivates the locking devices, e.g. pushing a button, pressing a lever or turning a knob.
3.10
junction line
intersection of the seat and the backrest
Note 1 to entry: See Figure 1.
Note 2 to entry: The method for determining the junction line can be found in 4.2.
4 General test conditions
4.1 Preliminary preparation
The tests are designed to be applied to a high chair that is fully assembled according to the
manufacturer’s instructions and ready for use.
If the product can be converted to other products not falling within the scope on this part of ISO 9221
(e.g. table and small chair, adult chair, swings, booster seats, etc.), these configurations shall not be
tested according to this part of ISO 9221.
The tests shall be carried out in indoor ambient condition with a temperature between 15 °C and 25 °C. If
the temperature lies outside this range, its maximum and minimum shall be recorded in the test report.
The high chair shall be tested as delivered. If the high chair is a knock-down type, it shall be assembled
according to the instructions supplied with it. If the instructions allow for different adjustments or
configurations of components (e.g. inclination of the backrest, height of the seat, position of the tray,
position of castors/wheels, etc.), the most onerous combination shall be used for each test.
Knock-down fittings shall be tightened before testing. Further re-tightening shall not take place unless
this is specifically required by the manufacturer’s instructions.
4.2 Determination of the junction line
The junction line is shown in Figure 1.
Where the backrest and the seat do not meet, the junction line is the projection of the backrest onto the
seat (see Figure 1).
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Key
LL junction line
1 backrest
2 seat
Figure 1 — Junction line
When the seat unit is in the form of a hammock, then a theoretical junction line, “LL”, is determined as
shown in Figure 2. The junction line may vary when the backrest is adjusted in different positions.
Key
AA top edge of the backrest
BB front edge of the seat
LL junction line
CL vertical projection of C on the hammock
Figure 2 — Junction line for seat units in form of a hammock
4.3 Test sequence
All tests shall be carried out on one sample and in the order laid down in this part of ISO 9221 except for
the test in 6.9, which shall be performed at the end of the whole test procedure.
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4.4 Tolerances
Unless otherwise stated, the following tolerances apply:
— Forces: ±5 %;
— Masses: ±0,5 %;
— Dimensions: ±1,0 mm;
— Angles: ±2°;
— Positioning of loading pads: ±5 mm.
The forces may be replaced by masses. The relationship of 10 N = 1 kg shall be used.
5 Test equipment
5.1 General
Unless otherwise specified, test forces may be applied by any suitable device because results are
dependent only upon correctly applied forces and not upon the apparatus.
The test forces in the static load tests shall be applied sufficiently slowly to ensure that negligible
dynamic forces are applied.
5.2 Test dummy
A rigid cylinder 200 mm in diameter and 300 mm in height, having a mass of 15 kg and with its centre
of gravity 150 mm above its base. All the edges of the cylinder shall have a radius of 5 mm. Two safety
harness anchorage points shall be provided. These shall be positioned 150 mm from the base and 180°
to each other around the circumference (see Figure 3).
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Key
1 top edge of the backrest
2 front edge of the seat
Figure 3 — Test dummy
5.3 Impact hammer
A striker in the form of a cylindrical object having a total mass of 6,5 kg, supported from a pivot by a
steel tube of 38 mm in diameter and with a wall thickness of 2 mm (see Figure 4). The distance between
the pivot and the centre of gravity of the striker shall be 1 000 mm. The pendulum arm shall be pivoted
by a low friction bearing.
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Dimensions in millimetres
Key
1 pendulum head, steel mass 6,4 kg
2 hardwood
3 rubber 50 IRHD (see ISO 7619-2)
4 pendulum arm, length 950 mm; high tensile steel tube ∅ 38 mm × 2 mm; mass 2 kg ± 0,2 kg
5 pivot point
Mass of assembly (Pos. No 1,2 and 3): 6,5 kg ± 0,07 kg
Figure 4 — Impact hammer
5.4 Loading pad
A rigid cylindrical object 100 mm in diameter having a smooth hard surface and rounded edges with
radius of 12 mm.
5.5 Small loading pad
A rigid cylindrical object 30 mm in diameter and at least 10 mm in thickness having a smooth hard
surface and rounded edges with radius of (0,8 ± 0,3) mm.
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5.6 Stops
Stops to prevent the article from sliding but not tilting, no higher than 12 mm except in cases where the
design of the item necessitates the use of higher stops, in which case the lowest stops that will prevent
the item from moving shall be used.
5.7 Floor surface
Horizontal, flat and rigid plane with a smooth surface. For the tests according to 6.2 and 6.18.3, a rubber
mat 2 mm thick, with hardness (75 ± 10) IRHD according to EN ISO 868, ISO 7619-1 or ISO 7619-2, shall
be used on a concrete floor.
5.8 Beams
Stops to prevent the article from sliding but not tilting, no higher than 12 mm except in cases where the
design of the item necessitates the use of higher stops, in which case the lowest stops that will prevent
the item from moving shall be used.
5.8.1 Beam for stability test and for measurement of the lateral protection length
A beam, not less than 900 mm long, with a square section of (25 ± 1) mm × (25 ± 1) mm and with a mass
of 0,5 kg ± 10 g.
NOTE An aluminium beam with a square section of 25 mm × 25 mm, with a length of approximately
1 020 mm and a wall thickness of 2 mm complies with these requirements.
5.8.2 Beam for height of lateral protection test
A beam, 86 mm wide with a mass of 0,5 kg ± 10 g.
5.9 Slide gauges
Cones with an angle of 30° ± 0,5°, made of plastics or other hard, smooth material mounted on a force
−01,
measuring device (see Figure 5). There shall be four cones having diameters 5 mm mm,
0
−01, 0 0
7 mm mm, 12 mm mm, and 18 mm mm.
0 +0,1 +0,1
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Figure 5 — Example of slide gauges
5.10 Force-measuring device
E.g. a dynamometer.
5.11 Test load
Cylinder of 5 kg mass and 100 mm diameter.
5.12 Small parts cylinder
Small parts cylinder for assessment of small components, having dimensions in accordance with Figure 6.
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Dimensions in millimetres
Figure 6 — Test cylinder
5.13 Small torso probe
The small torso probe shall be made from plastics or other hard, smooth material with dimensions as
shown in Figure 7.
Dimensions in millimetres
Key
1 handle
a 86
b 40
c 120
Figure 7 — Small torso probe
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5.14 Device for measuring the angle, the length and the height of the backrest and the
height of the lateral protection
Dimension in millimetres
Key
1 pivot hole
2 base board: 9 mm plywood or hardwood
3 allowed cut-off for crotch restraint
4 measuring device - reclining board: 30 mm × 12 mm hardwood
Pivot pin: 5 mm × 60 mm steel or other hard material
Figure 8 — Device for measuring the backrest angle, length and height
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Key
1 seat frame
2 angle to be measured
3 test dummy (see 5.2)
4 measuring device
L length of the backrest
H height of the backrest
Figure 9 — Measurement of the back rest angle, length and height
5.15 Leg probe
A cylindrical probe with a diameter of 38 mm and a length of at least 76 mm.
5.16 Wedge block
A block with smooth surfaces and with dimensions according to Figure 10, made of hard, smooth material.
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Dimensions in millimetres
Figure 10 — Wedge block
6 Test procedures
6.1 General
Before beginning the tests, visually inspect the high chair thoroughly. Record defects so that they are
not assumed to have been caused by the tests.
6.2 Impact test
The high chair shall be placed in the normal position of use on the floor surface (see 5.7) with the legs
against stops (see 5.6) opposite to the direction of the force.
Adjust the impact hammer (see 5.3) to fall from a height of 116 mm. The hammer shall strike the
structure at the impact point, when the arm of the impact hammer is vertical (see Figure 11).
The impact hammer shall strike, from the outside, the centre of the uppermost point of the back, the
front, and both lateral protections.
If the high chair overturns during the test, it shall be allowed to fall freely on the floor surface (see 5.7).
Repeat the test on the backrest only from the inside of the high chair in the same manner as above.
The test shall be carried out for a total of 10 times at each point.
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Figure 11 — Impact test
6.3 Durability of the locking mechanism
Operate any locking or attachment mechanism 300 times.
Before and after carrying out the test, measure the force required to operate the mechanism.
6.4 Strength of the locking mechanism
Place the high chair on the floor with the test dummy (see 5.2) in the centre of the seat.
Apply a force of 200 N at the point and in the direction considered most likely to fold the high chair.
If the high chair tends to tilt, secure it in a manner which does not prevent the folding.
Record whether the high chair collapses.
6.5 Small parts
Apply a tensile force to the component to be tested through a clamp or other suitable means. The
force shall be
— 50 N, where the largest accessible dimension of the component is less than or equal to 6 mm, and
— 90 N, where the largest accessible dimension of the component is greater than 6 mm.
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Apply the force gradually over 5 s and maintain for 10 s. If the component has become detached, check
whether the component fits wholly within the cylinder (see 5.12).
6.6 Openings
6.6.1 Openings between moving parts
Check if the 5 mm slide gauge penetrates the gap with a force of no more than 30 N.
If the 5 mm slide gauge penetrates, check whether the
...