[Ke Yin Network () News] Pallet is the most basic assembly and unloading, handling and distribution of modernized logistics in the world. Its function and significance are very significant and far-reaching. The intermodal universal flat pallet is a kind of pallet in logistics, and its standardization work determines the development direction and extent of a country's logistics. To this end, countries and standardization organizations are actively developing corresponding pallet size standards. GB / T 2934-2007 "intermodal purpose flat pallets main dimensions and tolerances" is China's intermodal purpose flat pallets size standard, JIS Z0601-2001 "combined transport general cargo pallets and pallet level" is the Japanese intermodal purpose flat pallets of standard size paper In the author, the author conducted a comparative analysis of the two, so that the industry can use the reference.
Standard scope of application
GB/T 2934-2007 specifies the planar dimensions and tolerances of intermodal universal flat pallets, other major dimensions and tolerances, and is suitable for intermodal universal flat pallets for roads, railways and waterways. JIS Z0601-2001 specifies the interchangeable wooden intermodal pallets and plastic intermodal pallets that are common to all industries and transport units. The scope of application of Japanese standards is more explicit than the standards of China.
Pallet plane dimensions and tolerances
GB/T 2934-2007 defines two planar dimensions, 1200mm x 1000mm and 1100mm x 1100mm, respectively. There are five types of pallets, one-way fork single-sided use tray, four-way fork single-sided use tray, two-way fork double-sided use tray, four-way fork double-sided use tray and partial four-way fork tray. The material of the tray is not clearly stated in the standard. The manufacturing tolerances for the planar dimensions are 3 mm for the upper tolerance and -6 mm for the lower tolerance.
JIS Z0601-2001 specifies a tray size of 1100 mmmm x 1100 mm x 144 mm. The tray is in the form of a two-way fork for double-sided use of the tray. The types of pallets are: wooden type A, code T11W-A; wooden type B, code T11W-B; plastic, code T11P. The manufacturing tolerances for the planar dimensions are length, width ± 2 mm, and height ± 2 mm.
It can be seen that the standard size of the pallet is only specified in the Chinese standard, that is, the length and width dimensions, and the height dimension is not given, indicating that several specifications are present in the height, instead of being unified into one type, and the material of the tray is not clearly defined. The Japanese standard stipulates that the length, width and height of the tray are only one type, and the types are divided into two types and three materials. In contrast, the Japanese standard is narrower than the Chinese standard, and the dimensional tolerance value is small, which is more conducive to logistics standardization.
Fork hole height dimension requirements
GB/T 2934-2007 stipulates that the height of the fork hole of the high tray is not less than 100mm, the height of the fork hole of the general tray is not less than 95mm, the height of the fork hole of the low tray is not less than 89mm, and there is no requirement for dimensional deviation. At the same time, the distance from the top surface of the fork hole to the bottom surface of the tray is not more than 156mm, and the thickness of the vertical beam plate and the top deck plate can be up to 200mm, which is 56mm higher than the maximum height of the Japanese tray.
JIS Z0601-2001 specifies that the fork hole height of the tray is 100 mm and the dimensional deviation is ±1 mm.
Other size requirements
Because there are many types of pallets involved, GB/T 2934-2007 only specifies the size range of the fork hole in the horizontal direction, and the thickness and width dimensions of the decking, spacers, stringers, etc. are not given. The horizontal dimensions of the given fork holes and openings in Table 1 are a large range and are not fixed values.
Table 1 Horizontal dimensions of the side into the partial four-way fork tray jack and opening JIS Z0601-2001's two wooden pallets also specify the thickness of the decking, the spacing of the decking and the height of the stringers (ie the height of the pallet fork holes), as well as the manufacturing tolerances of the decking and stringers. .
in conclusion
In the case of pallets made of wood pallets, the intermodal universal flat pallets produced in accordance with GB/T 2934-2007 can meet the standardization requirements of the plane size, but the various parts have various specific requirements, and the trays are various in form. Four-way forks, two-way forks, spacers, stringers, single-sided use, double-sided use, rectangular, square, and tray heights, etc., may not have any major problems during use, but are not conducive to The maintenance of the pallet is prone to the fact that the pallet is directly scrapped due to the lack of suitable replacement parts after the damage of a certain component of the pallet, which not only reduces the service life of the pallet, but also increases the amount of wood used and the cost of purchasing the pallet of the enterprise, which is neither economical. Not environmentally friendly.
While the two wooden pallets in Japan give the specific dimensions of each component, the pallet manufacturer only needs to prepare two kinds of planks and one kind of stringer, the material is available in a small variety, and the tray form is only one type, that is, the two-way fork is double-sided. With the use, companies can achieve "fool" production through the right mold. In the event of damage to the pallet components of the company, it is also convenient to purchase standard decking and stringers from the manufacturing company, thereby effectively controlling the service life of the pallets and reducing the production costs of the enterprises.
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