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1、J I S T*Bl134 95 4933608 0530767 573 UDC 614.89:629.118 JIS JAPANESE INDUSTRIAL STANDARD Protective helmets for bicycle users JIS T 81 3 4 - 1 9 9 5 , Translated and Published by Japanese Standards Association Printed in Japan 9 s Copyright Japanese Standards Association Provided by IHS under licens
2、e with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S T*dL34 95 D 4933608 0530768 40T In the event of any doubt arising, the original Standard in Japanese is to be final autho
3、rity. , Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Ta8134 95 4933b08 05307b9 346 UDC 614.89 : 6
4、29.118 JAPANESE INDUSTRIAL STANDARD J I S Protective helmets for bicycle users T 8134-1995 1. Scope This Japanese Industrial Standard specifies the protective helmets for bicycle users (hereafter referred to as “protective helmets“), which is used when riding on a bicycle and worn for the purpose of
5、 protecting the user from the injury on the head and mitigating the degree of injury. Remarks 1, The following standard is cited in this Standard. JIS D 1050 Road vehicles - Techniques of measurement in impact tests - Instrumentation 2. The units and numerical values given in 1 in this Standard are
6、based on the traditional units and are appended for informative reference. 2. Definitions For the purpose of this Standard, the following definitions apply: Shell The material which forms the outline of the protective helmet. Harness chinstrap mounting part, chinstrap length adjusting part and chins
7、trap fastener used for retaining the protective helmet in an appropriate position on the head. The device which consists of all parts such as chinstrap, Chincup form of chin of the protective helmet user. The accessory to the chinstrap which is made by adjsting to the Perform ance s Shock absorption
8、 of protective helmet The protective helmet, when tested in accordance with the testing method specified in 6.4, shall satisfy the following requirements. (i) The impact acceleration of not less than 2940 m/s2299.8 G) shall not be generated. (2) In the case where the impact acceleration of not less
9、than 1470 m/s2149.9 G) is generated, its duration shall not be more than 4 ms. 3.2 Strength f harness in 6.5, the harness shall be that the elongation of the chinstrap including the When tested in accordance with the method specified elongation due to the slide of fastening device is not more than 3
10、0 mm as the increase (I, - I,) of the maximum instant elongation (I,) after dropping a drop weight compared with the elongation at the time of static loading (lo) of preload, and the fastening device is able to be detached after the test. Copyright Japanese Standards Association Provided by IHS unde
11、r license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS T* - I- o9 o9 o9 o9 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Emp
12、loyees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- h a l a h u c c J I S T*8L34 95 m 4933608 0530775 64T m 7 T 8134-1995 Copyright Japanese Standards Association Provided by IHS under license with JSALice
13、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S T*813Y 95 m Y933608 O530776 58b m 8 T 8134-1995 (3) (4 Accelerometer Fig. 2, be built in the ball socket of the headform and have the f
14、ollowing characteristics: (a) (b) Maximum measuring value: 20 km/s22 039.4 G (c) Natural frequency: 20 O00 Hz or more The accelerometer shall, as shown in Informative reference Frequency characteristic: 10 Hz to 10 O00 Hz (Il dB) Measurement recording apparatus The measurement recon ng appar- atus t
15、o be connected to the accelerometer shall have the following performance: (a) The overall frequency characteristic shall be the frequency class of 1000 specified in JIS D 1050. (b) The apparatus shall be capable of reading the duration of the impact acceleration specified in 3.1 accurately and also
16、be capable of recording the measuring waveforms continuously. Steel anvil The steel anvil shall, as shown in the lower part of Informative reference Fig. 1, be a plane anvil of disk shape of 127 mn in diameter and 18.3 mm or more in thickness that has a horizontal impact plane, and be fixed on a sol
17、id foundation such as concrete bed. 6.4.3 Testing method The testing method shall be as follows: (i) Pretreatment of sample The shock absorption test shall be carried out after every time of pretreatments of high temperature treatment, low temperature treatment and immersion treatment to be conducte
18、d as follows: High temperature treatment chamber of 50+2“C for four hours or more. Keep the sample in a thermostatic Low temperature treatment chamber of -10+2“C for four hours or more. Keep the sample in a thermostatic Immersion treatment four hours or more. Immerse the sample in water of 25f5“C fo
19、r Nevertheless, the tests after the pretreatments of (a) and (b), if the time passes five minutes after taking out the sample, the test shall be carried out by adding another pretreatment at a rate of three minutes for every one minute of exceeding time. The test after the pretreat- ment of (c) shal
20、l be carried out within a period from fifteen minutes to six hours after taking out the sample, taking the time of draining into account. (2) Mounting of sample on headform be mounted on the headform in such a manner that the sample is made coincide with the sagittal plane of the headform and the lo
21、wer edge of shell at the center of forehead of sample is aligned with the 00 plane of forehead The sample pretreated as in (i) shall Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05
22、 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Tt8L34 95 = 4933608 0530777 412 9 T 8134-1995 of headform and fasten tightly the chinstrap so as to avoid skewing. For a sample provided with peak, the curved point shall lie in the 00 plane of the headform. Care shall
23、also be taken so that the sensitive axis of accelerometer lies not more than 5“ off the vertical line when the striker rests at the impact position. (3) Measurement of impact acceleration Drop the striker for shock absorp- tion test, without vibration from the height of 1.00 +:O5 m, measure the impa
24、ct transmitted through the protective helmet when the specified impact point of the sample is collided with the steel anvil by the accelerometer and the recording apparatus for measurement connected to it, and examine whether its value satisfies the requirement of 3.1. The same impact point shall be
25、 collided one time only and the measuring condition and the like shall be as follows: (3.1) Impact range and impact points The impact range shall be the upper part 40 mm or over apart from the 00 plane and the impact points shall be arbitrary two points in the impact range. However, the distance bet
26、ween the impact points shall be not less than 1/5 of the maximum periphery of the protective helmet. (3.2) Operation of recording apparatus for measurement The operation of recording apparatus for measurement shall be as follows: (a) Each instrument is connected with power source prior to the test a
27、nd, after leaving alone for necessary time until coming to an equillibrium condition, the test is carried out. (b) The calibration on overall apparatus is carried out by all means at the start and the end of a series of tests on shock absorption and the measured results are recorded. 6.5 Harness str
28、ength test 6.5.1 Pretreatment and number of samples One protective helmet allowed to stand for 24 hours or more at ordinary temperature and three protective helmets subjected to the pretreatment of high temperature treatment, low temperature treatment and immersion treatment specified in 6.4.3 (1) a
29、nd to the shock ab- sorption test, that is, four helmets in total shall be tested (see 6.4.1). 6.5.2 Testing apparatus as shown in Informative reference Fig. 3. The testing apparatus for harness strength shall be The testing apparatus shall consist of headform for harness test; supporter of headform
30、 for harness test; artificial chin; guide bar; drop weight; anvil fixed on the middle part of guide bar; preload weight; preload weight receiving plate fixed on the lower part of guide bar; device measuring height of artificial chin by indicator lever, elastic plastic and rod with graduation; winch
31、for raising and lowering drop weight and device for separation of drop weight; jack for raising and lowering preload weight; and so on. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14
32、:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S T*8134 95 = 4933608 0530778 359 10 T 8134-1995 The headform for harness test which shall conform to the headform specified in 6.4.2 (2) or the one equivalent thereto is used for positioning of the protective helmet t
33、o be mounted thereon. The artificial chin shall have two parallel steel rollers of 12.710.5 mm in diameter and capable of rolling freely and the distance between their centers is 76I0.5 mm. The guide bar shall be able to lead the drop weight and the preload weight and its upper end shall be fixed fi
34、rmly to the lower end of artificial chin distant equally from the centers of two rollers. The mass of drop weight shall be 38 +:.25 kg and the total mass of the guide bar and guide bar mounting part including the preload weight and excluding the drop weight shall be 23 -QZ5 kg. 6.5.3 . Testing metho
35、d The testing method shall be as follows: Mount the protective helmet in a manner that the inside surface of protec- tive helmet touches direct to the fixed headform for harness test. Lift the drop weight above the anvil by winch and leave the preload weight apart from and above the preload weight r
36、eceivor by moving the jack up- ward. Fasten the chinstrap of protective helmet and hang it on the two rollers of artificial chin avoiding the touch of fastener to the rollers. When hanging the artificial chin and guide bar, adjust the headform for harness test and the protective helmet so that the c
37、hinstrap and the guide bar are stabilized on the same vertical plane. Move the jack downward to put the preload weight on the preload weight receiving plate. Two minutes later, measure the length of I and make it lo. Move the jack upward to separate the preload weight apart above from the preload we
38、ight receiving plate. Adjust by the winch so that the space between the bottom surface of drop weight and the upper side surface of anvil becomes 20 mm. Drop the drop weight and measure the length of I as the peak value of kinematic elongation of chinstrap. Make it II. (10) Calculate the length of I
39、I - lo. (il) After the test, confirm whether the fastener can be released or not. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without
40、 license from IHS -,-,- J I S T*8l134 95 W 4933608 0530779 295 11 T 8134-1995 7 . Inspection The inspection shall be conducted on performance, construc- tion and material and the result shall conform to the specification in 3. to 5. 8. Marking either the inside or the outside with the following info
41、rmation: The protective helmet shall be visibly and durably marked on (i) Use (protective helmet for bicycle user) (2) Size of protective helmet (dimension of inner circumference of headband or that in the position corresponding to headband expressed in the unit of cm). (3) Manufacturers name or abb
42、reviation (4) Year and month of manufacture or its abbreviation 9. Instruction manual The instruction manual in which the following information is included shall accompany with the protective helmet: (1) This protective helmet shall not be used when riding on bicycle with motor and motor bicycle. (2
43、) The protective helmet well-fitting the head shall be used and the chinstrap shall be fastened correctly by all means. (3) The protective helmet that suffered a great impact even once shall not be used even though the flaw cannot be found in appearance. (4) Care to be taken when using organic solve
44、nt, detergent including organic solvent, paint, adhesive, disinfectant, etc. (the substances likely to deteriorate the materials of protective helmet shall not be used). ( 5 ) Method for maintenance of protective helmet. Copyright Japanese Standards Association Provided by IHS under license with JSA
45、Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Tr813Lt 95 W q933bO8 0530780 TO7 W 12 T 8134-1995 Informative reference Fig. 1. Apparatus for shock absorption test Unit: mm I I l
46、- . . . T Electromagnet device Supporting a m 2 .C c Y F O .- ! /Striker :_:_ Guide wire Steel anvil I Steel anvil Base table 7 Concrete base . . . . . . . . * . . . . 18.3 min. mk- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User
47、=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S T*8L39 95 4933b08 0530781 993 13 T 8134-1995 Informative reference Fig. 2. Striker for shock absorption test Accelerometer is mounted on ball socket within the headform )
48、 Check bolt Supporting arm Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 22:14:05 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS Tr8l134 95 W 4933608 0530782 88T W 14. T 8134-1995 Informative reference Fig. 3. Apparatus for harness strength test Uni