Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “प0रा1 को छोड न’ 5 तरफ” Jawaharlal Nehru “Step Out From the Old to the New” “जान1 का अ+धकार, जी1 का अ+धकार” Mazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 12726 (1989): Order picking trucks - Stability and stability test [TED 22: Transport Tractors and Trailers]
Transcript
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 12726 (1989): Order picking trucks - Stability andstability test [TED 22: Transport Tractors and Trailers]
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IS 12726 : 1989
Indian Standard
ORDER PICKING TRUCKS-STABILITY AND STABILITY TESTS
BUREAU OF’ iNDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC
NEW DELHI I10002
Jumury 1990 Price Group 2
Industrial Trucks Sectional Committee, TED 023
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards on 19 July 1989, after the draft finalized by the Industrial Trucks Sectional Committee had been approved by the Transport Engineering Division Council.
The term ‘truck’ used in this standard is intended to mean order picking trucks.
In the preparation of this standard, assistance has been derived from JIS D 6014-1982 ‘Order pickmg trucks - Stability and stability test’, issued by the Japanese Standards Association.
IS 12726 : 1989
Indian Standard
ORDER PICKING TRUCKS-STABILITY AND STABILITY TESTS
,
1 SCOPE
1.1 This standard specifies the stability and stability tests for order picking trucks with no external restraint, of up to and including 5 tonne rated capacity.
2 REFERENCES
The following Indian Standard is a necessary adjunct to this standard:
IS 4660 : 1977 Glossary of terms relating to powered industrial trucks
3 TERMINOLOGY
For the purpose of this standard, the terms and definitions given in IS 4660 : 1977 shall apply.
4 STABILITY
4.1 The stability shall be verified for the longitudinal and lateral directions according to the operating conditions (at the maximum and restricted speed and at standstill ) by Tests 1 to 5 ( see Table 1 ), specified in 5.1 by means of tilting test platform.
4.2 The truck shall be tested in the normal opera- tional condition, with a weight equivalent to the operator ( 90 kg) fixed, so that its centre of gravity is in the plan of symmetry of the chassis and at a height of 1 000 mm above the footplatc.
4.3 The truck shall be placed on the platform in location as indicated in Table 1, and the platform shall be tilted to the specified slope. The truck is considered to have the required stability, if it does not overturn.
4.4 In the test for lateral stability, it is permissible for one of the front wheels to lose contact with the platform and, in the case of three-wheeled trucks, for the outer edge of the chassis to come into contact with the tilting test platform without overturning.
5 TESTS
5.1 Kind of Tests
The kind of tests (see Table 1 ) shall bc as follows:
Test 1
The truck in the standard loaded condition shall be placed on the tilting test platform, set horizontally in such a position that its outer rigger wheel axle is parallel to the tilt axis of the platform, and the
platform shall be tilted to the specified slope. The test shall be carried out for the maximum fork heights at the maximum speed, restricted speed and at standstill conditions. Before tilting the platform, the tilt of the masts shall be corrected so that the load is vertically up (see Fig. 2 and 7 to 9 ).
Test 2
The truck in the standard loaded condition shall be placed on the tilting test platform, set horizontally in such a position that its driving (steering) wheel axle is parallel to the out rigger wheel axle, and the platform shall be tilted to the specified slope. The test shall be carried out for the maximum fork height at the maximum speed, restricted speed and at standstill condition. Before tilting the platform, the tilt of the masts shall be corrected so that the load is vertically up (see Fig. 3 and 10 to 12 ).
Test 3
The truck in the standard unloaded condition shall be tested in the same manner as in Test 2 (see Fig. 4 and 10 to 12).
Test 4
The truck in the standard loaded condition shall be placed on the test platform, set horizontally so that the line M-N shall be parallel to the tilt axis of the platform, which shall be tilted to the specified slope. The test shall be carried out for the maximum fork heights at the maximum speed, restricted speed and at standstill conditions. In the case, where the truck is restricted for steering, the related speed (reduced speed or zero) shall be applied (see Fig. 5 and 13 to 20 ).
Test S
The truck in the standard unloaded condition shall be tested in the same manner as in Test 4 ( see Fig. 6 and 13 to 20).
5.2 ‘Test Conditions
The test conditions shall be as follows:
a)
b)
The lest load Q shall have a mass equal to the maximum load and shall be the homogc- ncous cube, of which dimensions are equal to twice the load standard centre distance f) ( .SCC Fig. I ).
The centre of gravity of the test load shall be located at a height equal to the standard Io:~d centrc above the upside of the l’ork arms and in the vertical plane 01‘ symmetry of the masts (xc Fig. I ).
IS 12726 : 1989
c>
4
FIG. 1 POSITION OF TEST LOAl,
The test load shall be fixed on the fork arms so that the correct load centre is maintained during the testing.
e)
The truck shall be immobilized by the braking device. If the immobilization is not sufficient, it may be achieved by wedging the wheels against the truck frame or applying chocks or blocks to the tyres. Their height shall be 25 mm Min and 50 mm MUX and shall not exceed IO percent of the wheel diameter.
f)
E)
The coefficient of friction of the tilting plat- form surface may be increased, if necessary, by an appropriate friction increasing material.
When the truck is tied by means of ropes to prevent total overturning, lashing shall not be tightened until the truck commences over turning.
For Tests 2 to 5 (set Table 1 ), inclination of the masts or fork arms shall be in most unfavourable condition to stability.
Table 1 Order Picking Truck [ Clauses 4. I, 4.3, 5.1 and 5.2 ( g ) 1
Test No.
Stability
Operation conditions
Load
Fork height
Tilting platform slope (%I
1
Stacking
Loaded
Maximum lift height at maximum speed
Maximum lift height at restricted speed
Maximum lift height at standstill
4+ 1’24V
2
Longitudinal
Travelling
Loaded
Maximum lrft height at maximum speed
Maximum lift height at restricted speed
Maximum lift height at standstill
8 + 1’24V
3 4 I 5
Lateral
Travelling Stacking Travelling
Unloaded Loaded Unloaded
Maximum lift height at Maximum lift height at Maximum lift height at maximum speed maximum speed maximum speed
Maximum lift height at 300 mm Maximum lift height at restricted speed lift
Maximum lift height at restricted speed restricted speed
Maximum lift height at standstill
Maximum lift height at Maximum lift height at standstill standstill
8 + 1’24V 6 + 1’24V 6 + 2’48 V
w FIG. 2 FIG. L FIG. T
Location of the truck on the tilting platform
M
X
X__---_- Y
FIG. 7 FIG. 13 FIG. 1L FI G.15
X ---__Y
FIG. IO
X -- Y FIG. 19 FIG.8
FIG. 16
X Y N
N X Y FIG. 12 X--___-_y Y X____--_‘y
F IG.9 FIG.17 FIG. 18 FIG. 20
V : Speed of truck ( km/h) X-I : AXIS or nn or plarrorm (I-Y . L,“,,~,ruu,uaL ~CI,~I” 1111” “1 CLU1.. . . . . ^ .
G : Gradability of truck specified by the manufacturer ( % ) M-N : AXIS ot lateral stablllty or WUCK
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Revision of Indian Standards
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