This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of scissor-type aerial work platforms. This standard applies to scissor-type aerial work platforms. JG/T 5100-1998 Scissor-type aerial work platform JG/T5100-1998 Standard download decompression password: www.bzxz.net

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Construction Industry Standard of the People's Republic of China JG/T5100—1998
Scissors aerial work platform
Scissors aerial work platform
Published on June 23, 1998
Implementation on December 1, 1998
Published by the Ministry of Construction of the People's Republic of China
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JG/T5100—1998
This standard refers to the contents of the definition, structural safety factor, control, design basis of the lifting mechanism, system protection and other chapters of the American standard ANSIA92.5—1980 "Boom-type aerial work platform".
This standard also refers to the design basis and control of the working platform and lifting mechanism assembly of the American standard ANSIA92.6-1979 "Self-propelled aerial work platform". With the increasing use of aerial work platforms, their structural types are also increasing year by year. In order to meet the needs of industry development, we have formulated five product standards, namely "Cylinder-type aerial work platform", "Boom-type aerial work platform", "Scissor-type aerial work platform", "Pillar-type aerial work platform" and "Truss-type aerial work platform", based on the original J8291 "Aerial work platform" industry standard according to the different structural types of their products, to guide the design, manufacture and use of various products. In my country, the production batch of scissor-type aerial work platforms is large and the time is long. Its structural design and manufacturing process are more mature and perfect. Therefore, the scissor-type aerial work platform is selected as the representative model, and its common features are implemented in accordance with this standard. This standard will replace J82-91 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. The Beijing Construction Machinery Comprehensive Research Institute is responsible for the technical and basic unit of the mechanical equipment and vehicle standards of the Ministry of Construction.
The drafting units of this standard are: Building Mechanization Research Institute of China Academy of Building Research, Hangzhou Saiqi Engineering Machinery Factory, and Rugao Loading and Unloading Machinery Factory. The main drafters of this standard are: Wang Zhenfeng, Liu Zijin, Jing Qizuo, Zhao Hongxue, Chen Jianping, and Qi Zepei.
This standard is entrusted to the Building Mechanization Research Institute of China Academy of Building Research for interpretation.
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Construction Industry Standard of the People's Republic of China Scissors Aerial Work Platform JG/T5100—1998Scissors Aerial Work Platform Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging and storage of scissors aerial work platforms (hereinafter referred to as work platforms). This standard applies to scissor-type aerial work platforms. 2
Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should consider the possibility of using the latest versions of the following standards GB1497—85
Basic standard for low-voltage electrical appliances
GB3323—-87
Radiography and quality grading of steel fusion welded butt joints GB3766—83 General technical conditions for hydraulic systems GB/T51171995 Carbon steel welding rods
GB/T5118—1995 Low alloy steel welding rods
GB14761.5—93 Rapid pollutant emission standard for gasoline vehicles GB14761.6—93 Free acceleration smoke emission standard for diesel vehicles JG/T5011.12-92
General Technical Conditions for Painting of Construction Machinery and Equipment JG/T5012-92 General Technical Conditions for Packaging of Construction Machinery and Equipment Approved by the Ministry of Construction of the People's Republic of China on 1998-06-23 Engineering Construction Standard Full Text Information System
1998-12-01 Implementation
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JG5099-1998 Safety Rules for Aerial Work Machinery J38-86 Microscopic Counting Method for Solid Particles in Oil 3 Definitions
This standard adopts the following definitions.
3.1 Aerial Work Platform Aerial Work Platformfom Special equipment used to transport workers and equipment to a specified height for operation.
Scissors Aerial Work Platformfom Aerial Work Platform with a scissor-type lifting mechanism. Stationary scissors aerial work platform
Stationary seissors aerial work platform A scissors aerial work platform with a fixed chassis. 3.4Mobile scissors aerial work platform A self-powered walking device under the mobilescissors aerial work platform, which can move on the work site with the help of external force.
Self-propelled scissors aerial work platform Self-propelled scissors aerial work platform A scissors aerial work platform that uses its own power to travel on the work site or between sites.
3.6Boom scissors mechanism
The general term for the front support plate of the lifting part of the front support aerial work platform 3.7
Forked arm Forked rod
The rod that makes up the scissors mechanism.
Platform platform
The device on the work platform that carries workers and equipment. Such as bucket, basket, platform or other similar devices.
lowering
The process of the platform being lowered due to internal leakage of the hydraulic system when the platform stays at any working height.
3.10 Offset
The lateral movement of the platform when the scissor frame is being lifted or lowered or when the platform is subjected to horizontal forces.
Offsetdistance
The horizontal distance of the platform during the lifting and lowering of the working platform. 3.12 SpeedofliftingorloweringThe average speed of the platform when it is rising or falling. 3.13Stretchplatform
A platform that can be cantilevered horizontally to one side to a limited extent. 3.4
stabilization
The state in which the total overturning moment of the working platform is less than the total anti-overturning moment, and the sum of the reaction forces of the outriggers on one side is greater than zero.
3.15 Free-lowering
The platform descends at a free speed in an uncontrolled state. 3.16
Insulated platform
A platform with insulating properties.
3.17 Guardrail
Guardrails set on the outer edge of the platform.
3.18 Toeboards
Boards set along the outer edge of the platform surface. 3.19, Maximum height of platform maximum height.ofplatform The maximum vertical distance between the platform surface and the support surface of the working platform. 3.20
Maximum working height maximum working height The sum of the maximum height of the platform and the height (1.7m) that the operator can reach for safe work.
3.21 Rated load
ratedload
The maximum payload allowed by the platform.
3.22 Outrigger
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Device used to support the entire working platform during operation, maintain and increase its stability and play a leveling role.
3.23 Revolving platform revolvingplatform A platform that can rotate in the horizontal plane relative to the lifting device. 4 Classification
4.1 Type
The working platform is divided into the following types according to the form of walking power: a) fixed;
b) mobile;
e) white travel type.
4.2 Model
4.2.1 The work platform model is composed of the group code, characteristic code, main parameter code and update variant code, and the model description is as follows: b
Update variant code: expressed in the order of Chinese pinyin letters (uppercase script) Main parameter code: maximum height of the platform, m
Characteristic code: G--Fixed:
--Movable
Z--Mobile:
Group code: GTJ--Scissor type aerial work platform. 4.2.2 Marking example
a) The maximum height of the platform is 8m, mobile scissor-type aerial work platform: scissor-type aerial work platform GTJY8JG/T5100—19984wwW.bzxz.Net
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b) The maximum height of the platform is 8m, the first variant of the fixed scissor-type aerial work platform:
scissor-type aerial work platform GTJG8AJG/T5100—19984.3 Main parameters and their series
The main parameter of the work platform is the maximum height of the platform. See Table 1 for the main parameter series. Table 1 Main parameter series
Maximum platform height
1, 2, 2.5, 3, 4, (5), 6, (7), 8, 9, 10, 11, 12, 14, 16, 18, 20 Note: The values ​​in brackets do not belong to the priority number system, but are the existing product specifications Technical requirements
General requirements
The operating platform shall be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures.
All standard parts, purchased parts and outsourced parts shall have certificates of conformity. When necessary, random inspections shall be carried out and assembly shall be allowed only after confirmation of conformity.
The raw materials used shall be used only with a material guarantee certificate. When substitute materials are used, their main technical performance shall not be lower than the original design requirements. 5.1.4
All parts and components shall be inspected and assembled only after confirmation of conformity. The main parts and components that have passed the inspection shall be marked.
The parts and components of the same model product shall be interchangeable. Manual welding rods shall comply with the provisions of GB/T5117 and GB/T5118. All friction parts of moving parts shall be equipped with devices to ensure lubrication. The connection of parts shall be reliable and shall not be loose. 5.1.9 Lines and pipelines shall be arranged neatly, firmly and reliably. 5.1.10
The welds of each fork arm of the arm frame of the load-bearing component, the connection between the cylinder support beam and the fork arm, the connection between the longitudinal and transverse beams of the chassis, the connection between the lower hinge support and the lower roller track, etc., shall comply with the requirements of the second level of GB3323. The outside of the weld shall not have defects such as burn-through, undercut, slag inclusion, weld nodule, etc. There shall be no cracks in the longitudinal, transverse and parent metal of the weld, the continuous weld shall not be interrupted, the scale-like corrugation shall be formed evenly, and the maximum height difference shall not be greater than 2mm.
5.2 Working conditions requirements
a) The altitude shall not exceed 1000m;
b) The temperature shall be between -20 and 40℃;
c) The wind speed shall not exceed 13m/s;
d) The working ground shall be solid and flat, and the ground shall not sink during the operation; e) The allowable fluctuation of the power supply voltage shall be ±10%. 5.3
Human safety factor
5.b.1 The plastic material used for the load-bearing parts of the working platform shall have a structural safety factor of not less than 2 calculated according to the yield strength of the material.
5.3.2 The non-plastic material used in the load-bearing components of the working platform shall have a structural safety factor of not less than 5, calculated based on the tensile strength of the material. 5.3.3 The structural safety factor shall be calculated using formula (1): g
n=(+o)
wherein n is the structural safety factor;
is the material yield strength described in 5.3.1 or the material tensile strength described in 5.3.2, MPa;
oi is the stress generated by the structural mass, MPa; o
is the stress generated by the rated load, MPa
is the stress concentration factor;
is the dynamic load factor; the values ​​of
and can be determined through experimental stress analysis of the prototype, or by taking f≥1.10, f>1.25.
5.3.4 When the lifting power is transmitted by a system using wire ropes, chains or both, the safety factor of the wire ropes or chains shall not be less than 8. 5.3.5 The minimum bursting strength of key parts and components of the hydraulic system shall not be less than 4 times the system design pressure.
5.3.6 The minimum bursting strength of hydraulic system parts and components (such as hoses, hard pipes, accessories) determined by bursting strength shall not be less than 3 times the system design pressure. 5.4 Electrical system
5.4.1 The motor shall comply with the provisions of the current national standards. 5.4.2 The insulation performance of electrical components must comply with the relevant provisions of GB1497. The insulation resistance of the main components shall not be less than 1.0MQ, and the insulation resistance of the secondary line to ground shall not be less than 2.0Mb.
5.4.3Electrical equipment should be waterproof, shockproof and dustproof, and the components should be neatly arranged and firmly connected.
The electrical system should have safety protection devices. In the whole machine startup circuit, there is a main switch for cutting off the load. The system should have grounding protection, and the grounding resistance should not be greater than 40.
5.4.5The voltage of the control circuit of the electrical system should use a safe voltage or take reliable anti-electric shock protection measures.
All non-conductor metals should be grounded, and when the wire passes through the metal hole, it should have an insulating protective sleeve.
5.5Platform
5.5.1The height of the platform guardrail should not be less than 1m, and it should be equipped with a middle fence and a guardrail not less than 100mm high.
5.5.2The width of the platform shall not be less than 450mm, and the work surface shall be non-slip. 5.5.3 The platform surface should be equipped with a position for workers to grab the safety belt. 5.5.4
The guardrail structure should be able to withstand a load of 360N/m acting on the top guardrail or the middle partition in the horizontal direction, and the top guardrail or the middle partition between the two rods should be able to withstand a concentrated load of 1300N in the vertical direction.
The platform rated load value should be prominently marked on the platform. 5.5.6 The doors at the entrance and exit of the platform shall not open outwards. 5.5.7 If it is an insulated platform, the insulation voltage must be indicated on the platform. 5.6 Lifting mechanism
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5.6.1 The horizontal misalignment of the fork arm connection should not be greater than 8mm; the difference between the upper and lower gaps of the arm connection should not be greater than 4mm.
5.6.2 The parallelism of the two guide rails shall not be greater than 3/1000.5.6.3 The hardness of the arm pin shall not be less than HB220.5.6.4 The guide wheel shall not bite the rail or get stuck. 5.6.5 The lifting mechanism shall ensure the smooth lifting and lowering of the platform, and shall not have the phenomenon of jumping lifting.
5.8.6 The moving parts of the lifting mechanism shall be flexible when moving, and shall not have blocking and noise.5.7
Hydraulic system
The hydraulic system shall comply with the relevant requirements in GB 3766.5.7.2 The set pressure of the hydraulic system overflow valve shall not exceed 1.1 times the working pressure, and the rated working pressure of the system shall not be greater than the rated working pressure of the oil pump. 5.7.3
The hydraulic pipelines shall be arranged neatly and shall not have oil leakage. 5.7.4
The hydraulic system shall be equipped with devices to prevent overload and impact. The solid particle pollution level of hydraulic oil shall be 19/16. The hydraulic system should be equipped with a device that can prevent the hydraulic cylinder and platform from sliding down due to their own weight or from overspeeding and crashing due to pipeline rupture and leakage. 5.8
Working performance
5.8.1 Each mechanism should ensure smooth and accurate operation during operation, and should not produce creeping, vibration, impact and abnormal increase in driving power. The micro-motion performance of lifting and lowering should be good.
The mechanism must have the performance of the platform staying reliably in the air. For working platforms with extension platforms, the allowable load value and corresponding working conditions during extension should be clearly specified in the manual. 5.8.4 The ear noise of the internal combustion engine-driven working platform should not be greater than 86dB(A), and the working noise should not be greater than 82dB(A).
The ear noise of the electric-driven working platform should not be greater than 80dB(A), and the working noise should not be greater than 76dB(A).
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The emission of internal combustion engines shall comply with the provisions of GB14761.5 or GB14761.6. 5.8.5 The transmission system shall be stable and shall not have abnormal noise caused by vibration and oil pump cavitation.
5.8.6 The maximum horizontal lateral force F allowed to act on the platform when the platform is at the maximum height shall be calculated according to formula (2):
Where: G rated load, N;
F value shall not be less than 250N.
5.8.7 The working platform is placed on a solid horizontal surface. After any position within the perimeter of the platform 300m away from the perimeter is subjected to the concentrated rated load and raised and lowered 10 times, no permanent deformation or cracks shall occur in any component
5.8.8 The working platform is placed on a solid horizontal surface. After the platform is uniformly subjected to 1.33 times the rated load and raised and lowered 30 times, no permanent deformation or cracks shall occur in any component. 5.8.9 The maximum height error of the platform when unloaded shall not be greater than 1% of the nominal value. 5.8.10 The longitudinal and transverse span errors of the outriggers shall not be greater than 1% of the nominal value. 5.8.11
1%.
The width, length and height errors in the overall towing state should not be greater than the nominal value. 5.8.12 The lifting and lowering speeds should not be greater than 0.5m/s: the rotation speed should not be greater than 2/min.
5.8.13 Under the action of the rated load, the platform shall not sink more than 5mm within 20 minutes after the lifting or lowering brake at any position.
5.8.14 Each control device and component shall work reliably and accurately. 5.8.15 The center of gravity position error of the whole machine in the towing state should not be greater than 0.5% of the nominal value. 5.9
Traveling system
After the power of the walking mechanism of the self-propelled work platform is cut off, it should be able to be towed and moved. 5.9.2
The self-propelled work platform should be equipped with a running brake and a parking brake system. 5.9.3 The braking performance of the braking system must ensure that the transmission mechanism is in the neutral position and that the forward and reverse braking can be performed reliably when driving on an asphalt or cement road surface with a maximum slope of no more than 6°.
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5.9.4 The steering system and gear shifting operation should be flexible. 5.9.5 The brake of the parking brake system must be able to maintain the braking state after the braking action.
5.10 Outriggers and stabilizers
5.10.1 The outriggers, stabilizers and telescopic shafts of the working platform should be equipped with interlocking devices. 5.10.2 Hydraulically driven outriggers or stabilizers should be equipped with devices that can prevent them from retracting when the hydraulic circuit fails.
5.10.3 Each outrigger should be reliably fixed in the specified position and can be adjusted separately. 5.1 Control system
5.11.1 Emergency descending device operated on the ground in case of power failure or failure shall be provided and clearly marked.
5.11.2 For working platforms equipped with upper and lower control devices, the upper control device shall be installed on the platform, the lower control device shall have the functions of the upper control device, and a device capable of overriding the upper control shall be provided.
The operating direction of the control handle shall be consistent with the functional movement direction of the control, and when the control handle is released, it shall automatically return to the "stop" or middle position. 5.11.4 The control device shall be installed in a place where the operator can clearly see the whole picture of the operation process.
5.11.5 The various operating actions shall not interfere with each other and cause misoperation, and the operation shall be light, flexible, accurate and reliable.
5.12 Power system
5.121 The power system may be manually driven, electrically driven or driven by an internal combustion engine.
The handle of the manually driven work platform should be located in a place that is easy for the operator to operate. The operating force should not exceed 100N and the stroke should not exceed 400mm. 5.13 Deflection
5.13.1 The deflection of the work platform during the lifting process should not exceed 10% of the maximum height of the platform
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