GB/T 26949.21-2023 Industrial trucks—Verification of stability—Part 21 : Order-picking trucks with operator position elevating above 1 200 mm (English Version)
GB/T 26949.21-2023 Industrial trucks - Verification of stability - Part 21: Order-picking trucks with operator position elevating above 1200 mm
1 Scope
This document specifies the tests for verifying the stability of order picking trucks with an elevating operator position, as defined in ISO 5053-1, where the operator's position can be raised to an elevation above 1200 mm.
It is applicable to industrial trucks fitted with fork arms, platforms and/or integrated attachments under normal operating conditions.
It is not applicable to trucks fitted with a load carrier that can be shifted laterally or pivoted out of the truck's longitudinal centre plane.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5053-1 Industrial trucks - Vocabulary - Part 1: Types of industrial trucks
Note: GB/T 6104.1-2018, Industrial trucks - Terminology and classification - Part 1: Types of industrial trucks (ISO 5053-1:2015, IDT)
ISO 22915-1 Industrial trucks - Verification of stability - Part 1: General
Note: GB/T 26949.1-2020, Industrial trucks - Verification of stability - Part 1: General (ISO 22915-1:2016, IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5053-1 and ISO 22915-1 and the following apply.
3.1
normal operating conditions
operating conditions corresponding to the truck travelling indoors on smooth, level floors of sufficient strength such as those of concrete
Note: This definition is different from the one given for normal operating conditions in ISO 22915-1.
3.2
guided steering
steering mode, either mechanical (e.g. guidance rails) or non-mechanical (e.g. inductive guidance, laser sensor or infrared) not controlled directly by the operator, used to steer the truck on a predetermined straight path while travelling
3.3
restricted steering
operation under which the truck's steering is controlled by the operator and the steering angle is limited to not more than 10° from the forward or reverse travel direction
3.4
unrestricted steering
steering mode controlled by the operator with no limitation of the steering angle
4 Test conditions
4.1 General
See ISO 22915-1.
4.2 Position of the truck on the tilt table
4.2.1 Load and drive/steer axles
The load axle and the drive/steer axle are defined by Figure 1.
4.2.2 Tests 1
The truck shall be positioned on the tilt table so that its drive/steer axle, B-B, and load axle, C-C, are parallel to the tilt axis, X-Y, of the tilt table. See Table 1.
4.2.3 Tests 2, 3, 4 and 5
The truck shall be positioned on the tilt table with the line, M-N, parallel to the tilt axis, X-Y, of the tilt table. See Table 1.
In all positions, the castor wheel(s) shall be turned away from X-Y to the orientation that produces minimum stability.
Point M is the point located on the drive/steer axle end of the truck and defined as follows.
a) For trucks with a single drive (steer) wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive/steer axle and the centreline of the drive wheel width.
b) For trucks with a drive/steer axle in an articulating frame articulated in the centre plane of the truck: point M shall be the vertical projection onto the tilt table of the point of intersection between the lateral axis of the articulating frame and the centre plane, A-A, of the truck.
c) For trucks with dual drive (steer) wheels: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive/steer axle and the centre plane, A-A, of the truck.
d) For trucks with a single or dual non-sprung castor wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the castor wheel axle and the centreline of the castor wheel width.
e) For trucks with non-articulated, non-sprung castors or wheels and a non-articulated drive wheel:
1) for the non-sprung castor or wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the castor or wheel axle and the centreline of the castor or drive wheel width, with the non-sprung castor or wheel being positioned with the centreline of the castor wheel axle nearer to the centre plane of the truck;
2) for the non-articulated drive wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centre line of the drive wheel width.
f) For trucks with a sprung castor or wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centreline of the drive wheel width.
As shown in Table 1, point N is defined as the centre point of the area of contact between the tilt table surface and the front load wheel closest to the tilt axis, X-Y, of the tilt table.
4.3 Lift height
Lift heights for tests shall be measured from the tilt table to the upper-most point of the load carrying surface.
5 Verification of stability
The stability shall be verified in accordance with Table 1.
Standard
GB/T 26949.21-2023 Industrial trucks—Verification of stability—Part 21 : Order-picking trucks with operator position elevating above 1 200 mm (English Version)
Standard No.
GB/T 26949.21-2023
Status
valid
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
230.0
Implemented on
2024-4-1
Delivery
via email in 1~3 business day
Detail of GB/T 26949.21-2023
Standard No.
GB/T 26949.21-2023
English Name
Industrial trucks—Verification of stability—Part 21 : Order-picking trucks with operator position elevating above 1 200 mm
GB/T 26949.21-2023 Industrial trucks - Verification of stability - Part 21: Order-picking trucks with operator position elevating above 1200 mm
1 Scope
This document specifies the tests for verifying the stability of order picking trucks with an elevating operator position, as defined in ISO 5053-1, where the operator's position can be raised to an elevation above 1200 mm.
It is applicable to industrial trucks fitted with fork arms, platforms and/or integrated attachments under normal operating conditions.
It is not applicable to trucks fitted with a load carrier that can be shifted laterally or pivoted out of the truck's longitudinal centre plane.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5053-1 Industrial trucks - Vocabulary - Part 1: Types of industrial trucks
Note: GB/T 6104.1-2018, Industrial trucks - Terminology and classification - Part 1: Types of industrial trucks (ISO 5053-1:2015, IDT)
ISO 22915-1 Industrial trucks - Verification of stability - Part 1: General
Note: GB/T 26949.1-2020, Industrial trucks - Verification of stability - Part 1: General (ISO 22915-1:2016, IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5053-1 and ISO 22915-1 and the following apply.
3.1
normal operating conditions
operating conditions corresponding to the truck travelling indoors on smooth, level floors of sufficient strength such as those of concrete
Note: This definition is different from the one given for normal operating conditions in ISO 22915-1.
3.2
guided steering
steering mode, either mechanical (e.g. guidance rails) or non-mechanical (e.g. inductive guidance, laser sensor or infrared) not controlled directly by the operator, used to steer the truck on a predetermined straight path while travelling
3.3
restricted steering
operation under which the truck's steering is controlled by the operator and the steering angle is limited to not more than 10° from the forward or reverse travel direction
3.4
unrestricted steering
steering mode controlled by the operator with no limitation of the steering angle
4 Test conditions
4.1 General
See ISO 22915-1.
4.2 Position of the truck on the tilt table
4.2.1 Load and drive/steer axles
The load axle and the drive/steer axle are defined by Figure 1.
4.2.2 Tests 1
The truck shall be positioned on the tilt table so that its drive/steer axle, B-B, and load axle, C-C, are parallel to the tilt axis, X-Y, of the tilt table. See Table 1.
4.2.3 Tests 2, 3, 4 and 5
The truck shall be positioned on the tilt table with the line, M-N, parallel to the tilt axis, X-Y, of the tilt table. See Table 1.
In all positions, the castor wheel(s) shall be turned away from X-Y to the orientation that produces minimum stability.
Point M is the point located on the drive/steer axle end of the truck and defined as follows.
a) For trucks with a single drive (steer) wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive/steer axle and the centreline of the drive wheel width.
b) For trucks with a drive/steer axle in an articulating frame articulated in the centre plane of the truck: point M shall be the vertical projection onto the tilt table of the point of intersection between the lateral axis of the articulating frame and the centre plane, A-A, of the truck.
c) For trucks with dual drive (steer) wheels: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive/steer axle and the centre plane, A-A, of the truck.
d) For trucks with a single or dual non-sprung castor wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the castor wheel axle and the centreline of the castor wheel width.
e) For trucks with non-articulated, non-sprung castors or wheels and a non-articulated drive wheel:
1) for the non-sprung castor or wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the castor or wheel axle and the centreline of the castor or drive wheel width, with the non-sprung castor or wheel being positioned with the centreline of the castor wheel axle nearer to the centre plane of the truck;
2) for the non-articulated drive wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centre line of the drive wheel width.
f) For trucks with a sprung castor or wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centreline of the drive wheel width.
As shown in Table 1, point N is defined as the centre point of the area of contact between the tilt table surface and the front load wheel closest to the tilt axis, X-Y, of the tilt table.
4.3 Lift height
Lift heights for tests shall be measured from the tilt table to the upper-most point of the load carrying surface.
5 Verification of stability
The stability shall be verified in accordance with Table 1.
