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1、JIS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association JIS T 92221 (Reaffirmed : 2003) Wrist units ICs 11. 040. 40 Reference number : JIS T 9222 1995 (E) PROTECTED BY COPYRIGHT 5s Copyright Japanese Standards Association Provided by IHS under license with JSALice
2、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- T 9222 1995 Foreward This translation has been made based on the original Japanese Industrial Standard revised by the Minister of Internation
3、al Trade and Industry, through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Date of Establishment: 1989-06-01 Date of Revision: 1995-06-01 Date of Refirnation: 2003-05-20 Date of Public Notice in Official Gazette: Investigated by
4、: Japanese Industrial Standards Committee Divisional Council on Medical and Safety 2003-05-20 JIS T 9222 : 1995, First English edition published in 2004-08 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising
5、 as to the contents, the original JIS is to be the final authority. O JSA 2004 Au rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utiiized in any form or by any means, electronic or mechanical, includuig photocopying and microfilm, without permission in
6、writing from the publisher. Printed in Japan M&T PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license f
7、rom IHS -,-,- JAPANESE INDUSTRIAL STANDARD Types Symbols Aluminum alloy Al JIS T 9222 : 1995 &marks Wrist units made of aluminum alloy wrist units Stainless steel Plas tics 1 adults except for those for heavy works (hereafter referred to as “wrist units”). Scope This Japanese Industrial Standard den
8、es plate friiction type wrist units for ss P Wrist u n i t s made of stainless steel Wrist units made of plastics Remarks 1 Normative references of this Standard are shown below: JIS B 0205 JIS B 0207 JIS G 4303 JIS T 9217 Metric coarse screw threads Metric$ne screw threads Stainless steel bars Volu
9、ntav opening hooks 2 The units and numerical values given in 1 in this Standard are based on the traditional unit system and are appended for informative reference. 2 Definition of terms Main terms used in this Standard are defined as follows: Names of parts in the wrist unit shall be as shown in at
10、tached figure 1. minimum torque value (Tmd the value obtained by multiplying the power needed to start the rotation of the hook when the wrist unit is firmly fastened by the distance rom the centre of the wrist unit to the center of the hook control lever operation maximum torque value (Tmd the valu
11、e obtained by multiplying the power needed to start the rotation of the hook when the hook is rotated through 140” to the direction of tightening the wrist unit by the distance fkom the centre of the wrist unit to the centre of the hook control lever operation 4 Performance 4.1 General conditions Th
12、e wrist unit shall be such that a terminal device can be screwed in easily and can be fixed firmly by being rotated within a necessary and allowable angle range. 4.2 Static strength and durability The static strength and durability shall meet the performance requirements of table 2 when the test of
13、8 is conducted. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 T 9222 1995 Tensi
14、le strength Torque value Table 2 Static strength and durability lOOON100 kg or higher. 8 . 2 The maximum torque value (Ed is six times the 8 . 3 minimum torque value ( T A or smder. Items I Durability Performance i- The reduction rate of the minimum torque value at the position of O degree shall be
15、20% or less. The torque value at the position of 140-degree rotation to a 8.4 clockwise direction shall be +50% of the i n i t i a l maximum torque value. Test method Division Thickness d Diameter R I 35 or less Large (LI 46 or larger and less than 50 S m d (SI I Less than 46 5.2 Mass in the case of
16、 SS. 5.3 Mounting screws The mounting screws shall be metric fine threads specfied in JIS B 0207 and be M12X 1.5 and 10mm or longer in length. The mass of the wrist unit shall be 85g or less in the case of Al and 140g or less The material shall be SUS 304 specified in J I S G 4303 or those with at l
17、east the equivalent strength. 6 Appearance The appearance of the wrist unit shall be as follows: (1) The surface of the wrist unit shall be without noticeable scars, rust, or dirt. (2) The main body of the wrist unit shall be knurled to improve the condition of the joint with the forearm part of pla
18、stic upper limb prosthesis. The knurl wheel shall be 22 or 24 threads. 7 Parts Materials used for parts of the wrist unit shall be harmless to human body, free from unpleasant odour, and have corrosion resistance, moisture tolerance, and weather resistance, and meet the following requirements: (1) R
19、ubber Rubber shall be of a uniform composition and sufficiently durable to the use at the applied part. (2) Screws As a principle, screws used shall be metric coarse threads or metric fine threads specified in JIS B 0205 or JIS B 0207. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association
20、Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 T 9222 : 1995 (3) Other parts Parts using materials such as metals or plastics shall be durable t
21、o the use at applied part. 8 Tests 8.1 Conditions of a test place temperature and 65+30% humidity. 8.2 Tensile strength test The tensile strength test (1) shall be conducted to investigate whether or not a looseness is present between the insert part and main body when the wrist unit is fixed to a v
22、ertical direction and a tensile force of lOOON(iOO kgf) is applied as shown in figure 1. A test place shall be inside a room maintained at 20rllO“C Note(l) Shall be applied only to plastic products (Pl. Tensile strength force F Jig i n place of a terminai device 7 i / Test object (wrist unit) Figure
23、 1 Tensile strength test method 8.3 follows: (1) The voluntary opening hook prescribed in JIS T 9217 is screwed into the wrist unit and the strength of the rubber band shall be adjusted to make the picking up force of the hook tip 15 N(1.5 kgf). (2) The control cable mounted at the control lever of
24、the hook is pulled to a direction at which the open and close of the hook can be done most efficiently and the minimum force (Fd necessary for opening the hook tip shall be set (figure 2). Torque measurement test The torque value of the wrist unit shall be measured as PROTECTED BY COPYRIGHT Copyrigh
25、t Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 T 9222 : 1995 Unit : mm Figure 2 Measurement method of the minim
26、um force (Fd to open the hook (3) The hook is placed in such a manner that its tip faces downwards with the axis of the wrist unit horizontal, and the hook is screwed into the wrist unit until the hook doesnt rotate anymore when a tensile force (FA in P2 direction (figure 2) is applied to the contro
27、l cable. (4) Using a push pull gauge, the control cable is pulled to a vertical direction to the central axis of the hook to loosen (figure 3). A force necessary (3) to initiate a rotation of the hook is obtained five times and the minimum torque value ( T m d of the wrist unit is obtained by multip
28、lying the mean value (Fa) by the distance (I ) from the centre of the wrist unit to the operation centre of the hook control lever. Figure 3 Measurement method of the minimum torque value (5) Under the condition that the hook is rotated 140 degrees to the direction of loosening the wrist unit, the m
29、aximum torque value (Tmax) of the wrist unit is obtained by the same method as (4. 8.4 Durability test The durability of the wrist unit shall be investigated using a test device with which the wrist unit performs continuous reciprocating rotations with a range of 140 degrees. An example of the devic
30、e is shown in figure 4. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- Jig i n pia
31、ce of a t e r m i n a i device 5 T 9222 : 1995 Test obiect (wrist unid / I - - - - d part of the test object Cr Figure 4 A test device of the wrist unit (1) A jig corresponding to the hook (a stainless steel rod corresponding to SUS 304 of JIS G 4303 with a screw part of M12X 1.5, 10 mm in length) i
32、s screwed into the wrist unit firmly with the minimum torque value specified in 8.3(4) and set at the position of O degree in the test device. At that time, a lubricating oil such as a machine oil shall not be used at the screw parts. (2) The jig is rotated to the clockwise direction through 140 deg
33、rees fiom the minimum-torque position of the wrist unit and then reversed to a counterclockwise direction to the original angle. (3) The 140 degrees reciprocating rotations of the wrist unit are conducted 20 tirnedmin until reaching 5,000 times. (4) After the test is completed, the minimum and maxim
34、um torque values are measured by the method specified in 8.3(4) and 8.3(5). 9 Inspections 9.1 and mass, and the results shall conform to the provision of 4 and 5. partie s. 9.2 the results shall conform to the provision of 6. Sampling inspection Sampling inspections shall be conducted on performance
35、, size, In this case, the sampling method shall be decided by the agreement between interested 100% inspection The 100% inspection shall be conducted on appearance visually and 10 Packing Materials used for packing s h a l l be water-proof and corrosion-proof. The packing shall be conducted in such
36、a manner that the wrist unit will not be damaged during delivery and storage. 11 Designation of the product Standard, type, and division. The product shall be designated by the title of this PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicense
37、e=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 6. T 9222 : 1995 12 Marking 12.1 conspicuous part of the wrist unit. Marking of the product The following items shall be marked indelibly on a (
38、1) Name of manufacturer of the prosthetics parts or its abbreviation (2) Manufacture year and month or their abbreviation 1 2 . 2 Marking of package The following matters shall be marked on the package. (1) Reference to this Standard (2) Type (3) Division of the wrist units according to thickness an
39、d diameter (4) When screws other than metric coarse threads and metric fine threads prescribed in JIS B 0205 and JIS B 0207 are used, the diameter and pitch of the thread (5) Name of manufacturer of prosthetics parts or its abbreviation (6) Manufacture year and month or their abbreviation 1. Cap 2.
40、Rubber 3. Main body 4. Washer 5. Insert part Attached Figure 1 Names of parts of the wrist unit Related standards JIS T O101 JIS Z 8203 Glossary o f terms inprosthetics arid orthotics SI units and the use o f their multiples and o f certain other units PROTECTED BY COPYRIGHT Copyright Japanese Stand
41、ards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- Errata for JIS (English edition) are printed in Standardization J o u d , publishe
42、d monthly by the Japanese Standards Association, and also provided to subscribers of JIS (English edition) in Monthly Znfumtion. Errata will be provided upon request, please contact: Standardization Promotion Department, Japancse Standards Association 4-1-24, Akasaka, Minato-ku, Tobo, 107-8440 JAPAN
43、 TEL. 03-3583-8002 FAX. 03-3583-0462 PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 07:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,-