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GB 14747-2006: Safety requirements for child tricycles
GB/T 14747-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.190
Y 57
GB 14747-2006
Replacing GB 14747-1993
Safety requirements for child tricycles
ISSUED ON: FEBRUARY 21, 2006
IMPLEMENTED ON: JANUARY 01, 2007
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Technical requirements ... 7
4.1 Materials ... 7
4.2 Mechanical strength ... 8
4.3 Sharp edges, sharp ends, exposed protrusions, pinch points, small parts ... 8
4.4 Stability ... 9
4.5 Parts ... 10
4.6 Product signs and instructions for use ... 12
5 Test methods ... 14
5.1 General requirements ... 14
5.2 Test for specific migratable elements (see 4.1.1) ... 14
5.3 Combustion performance test (see 4.1.2) ... 14
5.4 Drop test (see 4.2, 4.5.4.2) ... 14
5.5 Sharp edge test (see 4.3.1) ... 15
5.6 Sharp end test (see 4.3.2) ... 15
5.7 Small parts test (see 4.3.5) ... 15
5.8 Driving stability test (see 4.4.1) ... 15
5.9 Forward tilting stability test (see 4.4.2.1) ... 16
5.10 Backward tilting stability test (see 4.4.2.2) ... 16
5.11 Handlebar riser strength test (see 4.5.3.2) ... 17
5.12 Handlebar riser clamp test (see 4.5.3.5) ... 18
5.13 Saddle adjustment clamping device test (see 4.5.4.2)... 18
5.14 Impact test (see 4.5.5) ... 19
5.15 Backrest structural firmness test (see 4.5.6) ... 19
5.16 Assist-push-rod strength test (see 4.5.7) ... 19
5.17 Test of pedal height above ground (see 4.5.8.2) ... 20
Safety requirements for child tricycles
1 Scope
This standard specifies the safety technical requirements and test methods for child
tricycles for one or more children.
This standard does not apply to toy tricycles or tricycles designed for other special
purposes (such as amusement tricycles).
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB 6675-2003 Toys safety - Part 1: Basic code
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Child tricycles
A wheeled vehicle, where the contact points of each wheel with the ground shall be
able to form a triangle or trapezoid, meanwhile the front wheel is driven by human
power only by pedals. If the shape formed by the contact points of the wheels with
the ground is a trapezoid, the width of the narrow wheel track shall be less than half
of the wide wheel track.
3.2
Track
The distance between two wheels with a common axle, i.e., the outer dimensions of
the two wheels in contact with the ground (see Figure 1).
Analysis result correction value = 120 - 120 × 30% = 120 - 36 = 84 (mg/kg).
This figure is considered to meet the requirements of this standard (the maximum limit of
migratable lead in Table 1 is 90 mg/kg).
4.1.2 Combustion performance
It is prohibited to use flammable materials in the parts of child tricycles.
When tested according to 5.3 (combustion performance test), it shall meet the relevant
requirements of Appendix B (combustion performance) of GB 6675-2003.
4.2 Mechanical strength
No part of the child tricycle shall fracture or have visible cracks under normal use and
foreseeable abnormal use, and after testing according to 5.4 (drop test).
4.3 Sharp edges, sharp ends, exposed protrusions, pinch points, small
parts
4.3.1 Sharp edges
When tested according to 5.5 (sharp edge test), there shall be no accessible dangerous
sharp edges on the child tricycle.
4.3.2 Sharp ends
When tested according to 5.6 (sharp end test), there shall be no accessible dangerous
sharp ends on the child tricycle.
4.3.3 Exposed protrusions
There shall be no exposed protrusions in the zones A and B as shown in Figure 3.
When the child tricycle is tested in accordance with 5.9 (forward tilting stability test),
it shall not overturn forward.
4.4.2.2 Backward tilting stability
When the child tricycle is tested in accordance with 5.10 (backward tilting stability test),
it shall not overturn backward.
4.5 Parts
4.5.1 Connecting fasteners
All bolts, screws, nuts, etc. used for connection or fastening shall not fracture, loosen,
have visible cracks or lose their proper function, when tested according to the
requirements of this standard.
4.5.2 Protective cap
The protective cap used to protect the exposed protrusions shall be able to withstand a
tensile force of 70 N, without falling off.
4.5.3 Operating system
4.5.3.1 Riser insertion depth mark
If the handlebar riser is an adjustable structure, there shall be a permanent mark or ring
on the riser to clearly indicate the minimum insertion depth of the riser into the front
fork assembly. The mark shall not damage the strength of the riser; the minimum
insertion depth from the end of the riser shall not be less than 2.5 times the riser diameter;
the stem shall maintain its proper strength within a length of at least one tube diameter
below the minimum insertion depth mark.
4.5.3.2 Strength of handlebar riser
The handlebar riser shall be tested according to 5.11 (test of crossbar strength) and shall
not fracture.
4.5.3.3 Crossbar
The crossbar shall be symmetrical at both ends with the longitudinal centerline of the
child tricycle. When the crossbar is at the highest position and the saddle is at the lowest
position, the distance between them shall not exceed 457 mm.
4.5.3.4 Both ends of crossbar
The crossbar shall be equipped with grips or other protective devices at both ends. The
grips or other protective devices shall be able to withstand a tensile force of 70 N and
shall not fall off. Crossbars made of plastic are not subject to this clause.
4.5.3.5 Clamping device for handlebar riser
When tested according to 5.12 (test of clamping device for handlebar riser), there shall
be no relative displacement between the handlebar riser and the front fork riser. The
riser/fork assembly and other parts shall not be damaged.
4.5.4 Saddle
4.5.4.1 Saddle tube insertion depth
If the saddle tube is an adjustable structure, there shall be a permanent mark or ring on
the saddle tube to clearly indicate the minimum insertion depth of the saddle tube into
the frame (i.e., the maximum height to which the saddle can be adjusted). The mark
shall not damage the strength of the saddle tube. The minimum insertion depth from the
bottom of the saddle tube shall not be less than 2 times the diameter of the saddle tube,
meanwhile the saddle tube shall maintain its strength within a length of at least one tube
diameter below the minimum insertion mark.
4.5.4.2 Saddle adjustment clamping device
Under normal use, the saddle clamping head shall be able to firmly clamp the saddle,
so that it shall not move in any direction. After the child tricycle is tested according to
5.4 (drop test), when it is tested according to 5.13 (saddle adjustment clamping device
test), the saddle clamping device shall not move in any direc...