1、Designation: F977 18Standard Consumer Safety Specification forInfant Walkers1This standard is issued under the fixed designation F977; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision.Anumber in parentheses
2、 indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis consumer safety specification addresses walker incidents that were identified by the U.S.Consumer Product Safety Commission (CPSC).Based on data collecte
3、d by the CPSC, the majority of incidents involved children falling down stairsor steps in walkers. Other incidents involved children tipping over in walkers or accessing hot surfacesor liquids. The injuries associated with these incidents ranged from cuts and bruises to burns, skullfractures, and de
4、aths. Most of the children injured were under 15 months old.In response to the incident data provided by the CPSC, this consumer safety specification attemptsto minimize the risk of injury or death associated with children in walkers falling down stairs orbetween levels, or tipping over. It also con
5、tains provisions to address the risk of injury associated withwalker seating systems and folding mechanisms.1. Scope1.1 This consumer safety specification covers performancerequirements, test methods, and marking requirements topromote safe use of the infant walker (see 3.1).1.2 This consumer safety
6、 specification is intended to mini-mize accidents to children resulting from normal use andreasonably foreseeable misuse or abuse of walkers.1.3 No walker produced after the approval date of thisconsumer safety specification shall, either by label or othermeans, indicate compliance with this specifi
7、cation unless itconforms to all requirements contained herein.1.4 This consumer safety specification is not intended toaddress accidents and injuries resulting from the interaction ofother persons with the child in the walker or the accidentsresulting from abuse and misuse by children able to walk.1
8、.5 The values stated in inch-pound units are to be regardedas the standard. The SI units given in parentheses are forinformation only.1.6 The following precautionary caveat pertains only to thetest method portion, Section 7, of this consumer safety speci-fication: This standard does not purport to a
9、ddress all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was de
10、veloped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced D
11、ocuments2.1 ASTM Standards:2D3359 Test Methods for Rating Adhesion by Tape TestF963 Consumer Safety Specification for Toy Safety2.2 Federal Regulations:316 CFR 1303 Ban of Lead-Containing Paint and CertainConsumer Products Bearing Lead-Containing Paint16 CFR 1500 Hazardous SubstancesAct Regulations
12、Includ-ing Sections:1500.48 Technical Requirements for Determining a SharpPoint in Toys or Other Articles Intended for Use byChildren Under Eight Years of Age1500.49 Technical Requirements for Determining a SharpMetal or Glass Edge in Toys or OtherArticles Intended forUse by Children Under Eight Yea
13、rs of Age1This consumer safety specification is under the jurisdiction of ASTM Commit-tee F15 on Consumer Products and is the direct responsibility of SubcommitteeF15.17 on Carriages, Strollers, Walkers and Stationary Activity Centers.Current edition approved Aug. 1, 2018. Published August 2018. Ori
14、ginallyapproved in 1986. Last previous edition approved in 2012 as F977 12. DOI:10.1520/F0977-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Docum
15、ent Summary page onthe ASTM website.3Available from U.S. Government Printing Office, N. Capital and H Streets, NW,Washington, DC 20401.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accorda
16、nce with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.11500.50.52 Test Methods for Simula
17、ting Use and Abuse ofToys and Other Articles Intended for Use by Children16 CFR 1501 Method for Identifying Toys and Other Ar-ticles Intended for Use by Children Under Three Years ofAge Which Present Choking, Aspiration, or IngestionHazards Because of Small Parts3. Terminology3.1 Definitions of Term
18、s Specific to This Standard:3.1.1 conspicuous, adja label that is visible, when the unitis in a manufacturers recommended use position, to a personstanding near the unit at any one position around the unit butnot necessarily visible from all positions.3.1.2 dynamic load, napplication of impulsive fo
19、rcethrough free fall of a weight.3.1.3 manufacturers recommended use position, nanyposition that is presented as a normal, allowable, or acceptableconfiguration for the use of the product by the manufacturer inany descriptive or instructional literature. This specificallyexcludes positions that the
20、manufacturer shows in a likemanner in its literature to be unacceptable, unsafe, or notrecommended.3.1.4 non-paper label, nany label material (such as plasticor metal) which either will not tear without the aid of tools ortears leaving a sharply defined edge.3.1.5 occupant, nthat individual who is i
21、n a product that isset up in one of the manufacturers recommended use posi-tions.3.1.6 paper label, nany label material which tears withoutthe aid of tools and leaves a fibrous edge.3.1.7 static load, na vertically downward force applied bya calibrated force gauge or by dead weights.3.1.8 walker, na
22、 mobile unit that enables a child to moveon a horizontal surface when propelled by the child sitting orstanding within the walker, and that is in the manufacturersrecommended use position. Examples of different style walkerscan be seen in Fig. 1.4. Calibration and Standardization4.1 All testing shal
23、l be conducted on a concrete floor thatmay be covered with18 in. (3 mm) thick vinyl floor cover,unless test instructs differently.4.2 The walker shall be completely assembled, unless oth-erwise noted, in accordance with the manufacturers instruc-tions.4.3 No testing shall be conducted within 48 h of
24、 manufac-turing.4.4 The product to be tested shall be in a room with ambienttemperature of 73 6 9F (23 6 5C) for at least 1 h prior totesting. Testing then shall be conducted within this temperaturerange.4.5 All testing required by this specification shall be con-ducted on the same unit.4.6 The foll
25、owing guidelines shall apply to force gaugesused for testing:FIG. 1 Illustrations of Five Types of Baby WalkersF977 1824.6.1 EquipmentForce gauge with a range of 0 to 25 lbf(111 N) and a tolerance of 60.25 lbf (1.1 N). A calibrationinterval shall be maintained for the force gauge which willensure th
26、at the accuracy does not drift beyond the statedtolerance.4.6.2 EquipmentForce gauge with a range 0 to 100 lbf(445 N) and a tolerance of 61 lbf (4.4 N).Acalibration intervalshall be maintained for the force gauge which will ensure thatthe accuracy does not drift beyond the stated tolerance.5. Genera
27、l Requirements5.1 The walker shall conform to the regulations specified inSection 2 of this specification before and after all testing.5.2 Prior to testing, any exposed wood parts shall be smoothand free from splinters.5.3 Latching or Locking MechanismsAny unit that foldsshall have a latching or loc
28、king device or other provision in thedesign that will prevent the unit from unintentionally foldingwhen properly placed in the manufacturers recommended useposition. The unit shall remain in its manufacturers recom-mended use position during and upon completion of the test, inaccordance with 7.2. If
29、 a unit is designed with a latching orlocking device, that device shall remain engaged and operativeafter testing.5.4 OpeningsHoles or slots that extend entirely through awall section of any rigid material less than 0.375 in. (9.53 mm)thick and admit a 0.210 in. (5.33 mm) diameter rod shall alsoadmi
30、t a 0.375 in. (9.53 mm) diameter rod. Holes or slots thatare between 0.210 in. (5.33 mm) and 0.375 in. (9.53 mm) andhave a wall thickness less than 0.375 in. (9.53 mm), but arelimited in depth to 0.375 in. (9.53 mm) maximum by anotherrigid surface shall be permissible (see Fig. 2).The product shallb
31、e evaluated in all manufacturers recommended use positions.5.5 Scissoring, Shearing, PinchingA product, when in amanufacturers recommended use position, shall be designedand constructed so as to prevent injury to the occupant fromany scissoring, shearing, or pinching when members or com-ponents rota
32、te about a common axis or fastening point, slide,FIG. 2 Opening ExamplesF977 183pivot, fold or otherwise move relative to one another.Scissoring, shearing, or pinching that may cause injury shallnot be permissible when the edges of any rigid parts admit aprobe greater than 0.210 in. (5.33 mm) and le
33、ss than 0.375 in.(9.53 mm) diameter at any accessible point throughout therange of motion of such parts.5.6 Exposed Coil SpringsAny exposed coil spring whichis accessible to the occupant, having or capable of generatinga space between coils of 0.210 in. (5.33 mm) or greater duringstatic load testing
34、 in accordance with 7.1.2 shall be covered orotherwise designed to prevent injury from entrapment.5.7 Labeling:5.7.1 Warning labels, whether paper or non-paper, shall bepermanent when tested per 7.4.1 7.4.3.5.7.2 Warning statements applied directly onto the surfaceof the product by hot stamping, hea
35、t transfer, printing, woodburning, etc. shall be permanent when tested per 7.4.4.5.7.3 Non-paper labels shall not liberate small parts whentested in accordance with 7.4.5.5.8 Protective ComponentsIf a child can grasp compo-nents between the thumb and forefinger, or teeth (such as caps,sleeves, or pl
36、ugs used for protection from sharp edges, points,or entrapment of fingers or toes), or if there is at least 0.040 in.(1.00 mm) gap between the component and its adjacent parentcomponent, such component shall not be removed when testedin accordance with 7.5.5.9 ToysToy accessories attached to, remova
37、ble from, orsold with an infant walker, as well as their means ofattachment, must meet applicable requirements of ConsumerSafety Specification F963.6. Performance RequirementsNOTE 1The forces that are to be applied to the sample in the testsdescribed in Section 7 of this specification are readily ap
38、plied by means ofa calibrated force gauge, or in the case of static load and dynamic loadtests, by fixed masses.6.1 Stability:6.1.1 Tipping Resistance Against an Immovable ObjectAminimum stability index of 18 shall be required to tip over awalker either forwards or backwards when tested in accordanc
39、ewith 7.3.6.1.2 Occupant Leaning Over EdgeA walker shall remainupright (not tip over) when forces are applied forward, andsideward, in accordance with 7.3.4.6.2 Structural IntegrityAll tests that cover static anddynamic loading, and support of the occupant, are to beperformed on the same product, se
40、quentially and withoutrefurbishing or repositioning of adjustment, if any. At testconclusion, there shall be no failure of seams, breakage ofmaterials, or changes in adjustments that could cause the unitnot to fully support the child or create a hazardous condition asdefined in Section 5. Maximum sl
41、ippage of adjustable features,if any, is 1 in. (25 mm).6.2.1 Dynamic LoadThe occupant support member (seat)shall support a dynamic load when tested in accordance with7.1.1.6.2.2 Static LoadThe walker shall not create a hazardouscondition as defined in 5.4 when tested in accordance with7.1.2.6.2.3 Le
42、g OpeningsThe seat of the walker shall be de-signed so that the leg openings will not permit passage of thetest probe (see Fig. 3) when tested in accordance with 7.1.3.6.3 Prevention of Falls Down Step(s)The walker shallmaintain contact with and be supported only by the testplatform at the conclusio
43、n of the tests in 7.6.6.4 Parking Device (applicable to walkers equipped withparking brakes)The walker shall have a maximum displace-ment of 1.97 in. (50 mm) for each test in each direction(forward, rearward, and sideward) when tested in accordancewith 7.7.7. Test MethodsNOTE 2Except for the structu
44、ral integrity tests (see 7.1), that shall beperformed first, the tests can be performed in any sequence.7.1 Structural Integrity (see 6.2):NOTE 3All wood blocks are fabricated from 1 in. nominal thicknesslumber having a finish thickness of34 in. (19 mm) unless otherwise stated.7.1.1 Dynamic Load (se
45、e 6.2.1):7.1.1.1 Position the walker in the manufacturers recom-mended use position with all wheels on the floor. If adjustable,adjust to the highest and most upright position.7.1.1.2 Affix to the walker seata6by6in.(150 by 150 mm)wood block. If the unit has a hammock type seat, use a standard6 in.
46、weld cap, as identified in Fig. 4.Attach the weld cap to thebottom of the test weight with the convex surface down.7.1.1.3 Drop a test weight of 33 lb (15.0 kg), with theweight of the weld cap included, onto the seat at least adistance of 1 in. (25 mm) 100 times at a rate of 4 6 1 s percycle.7.1.1.4
47、 When testing a spring supported adjustable bouncerwalker, test with the unit in the highest adjustment position andsupport the frame so that the dropping of the 33 lb (15.0 kg)weight does not cause the frame to bottom out artificially.7.1.2 Static Load (see 6.2.2):7.1.2.1 Position the walker as in
48、7.1.1.1.7.1.2.2 Center a weight of 90 lb (40.8 kg) for a period of 1minona6by6in.(150 by 150 mm) wood block affixed to thewalker seat. If the unit has a hammock type seat, use a standard6 in. (150 mm) weld cap, convex surface down, as identified inFig. 4 instead of the specified wood block. Include
49、the weightof the weld cap in the 90 lb (40.8 kg) weight. If the naturalaction of a bouncer type walker will not allow the fullapplication of 90 lb (40.8 kg) static load, then restrict thebouncer mechanism by any means possible so that the fullstatic load can be applied to the seat or section of the walkeroccupied by the child.7.1.2.3 Position the walker in the manufacturers recom-mended use position with all wheels on the floor. If adjustable,adjust to the lowest use position.7.1.2.4 Center a weight of 50 lb (22.7 kg) for a period of 1m
