GB/T 17910（ISO 5057） 檢查指南

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4、 檢查周期

使用中的貨叉應(yīng)以不超過12個月的時間間隔或在一旦發(fā)現(xiàn)其有缺陷或變形時，按照如下第5章的要求進行檢查。惡劣工況條件下使用的貨叉，需要更頻繁地進行檢查。

5、 檢查

5.1  應(yīng)由經(jīng)過培訓的人員對貨叉進行認真檢查，以查明其是否有影響安全使用的損壞、失效和變形等。如貨叉出現(xiàn)上述任何一種缺陷，則須停止使用。經(jīng)過修復后并按照6.2的要求進行試驗，符合要求后，才能投入使用。

5.2 表面裂紋

貨叉應(yīng)進行目測檢查，必要時，應(yīng)采用無損探傷法，以檢查其有無裂紋。應(yīng)特別注意貨叉根部、上鉤、下鉤（包括其與垂直段的連接處），如發(fā)現(xiàn)貨叉表面有裂紋，須停止使用。

5.3 叉尖高低差

當一組貨叉安裝在叉架上時，應(yīng)檢查兩叉尖之間的高度差。如果叉尖高度差超過水平段長度的3%或叉車制造廠推薦的值，則該組貨叉須停止使用。

該組貨叉在進行必要的調(diào)整（見6.1）并按照6.2進行試驗之前，不得投入使用。

5.4 定位鎖

應(yīng)保證定位鎖在原位處于良好的維護和正常的工作狀態(tài)。如發(fā)現(xiàn)任何故障，貨叉在進行良好的修復之前須停止使用。

5.5 標記的清晰度

貨叉標記應(yīng)符合GB/T 5182的規(guī)定，如標記不清晰，貨叉須停止使用。

5.6 貨叉的磨損

5.6.1 貨叉的水平段和垂直段

應(yīng)檢查貨叉水平段和垂直段的磨損程度，尤其是貨叉根部。

如果貨叉水平段和垂直段的厚度減少到貨叉設(shè)計厚度的90%，或由貨叉制造廠規(guī)定的較小厚度，則貨叉須停止使用。

5.6.2 貨叉的安裝

應(yīng)檢查貨叉的上掛鉤承載面以及上下掛鉤的定位面的磨損，擠壓和其他局部變形。如果這些缺陷很明顯，使貨叉和貨叉架之間的間隙變得很大，則貨叉須停止使用。對于其他安裝形式，也應(yīng)進行類似的檢查。

4. Inspection cycle

The forks in use should be inspected in accordance with the requirements of Chapter 5 below at intervals of no more than 12 months or once they are found to be defective or permanently deformed (please contact Cascade for special gauges). Fork forks used under severe working conditions need to be inspected more frequently.

5. Check

5.1 The forks should be carefully inspected by trained personnel to find out whether there are damages, failures, and deformations that affect safe use. If any of the above-mentioned defects occurs in the fork, it must be discontinued. After repairing and testing in accordance with the requirements of 6.2, it can be put into use only after meeting the requirements.

5.2 Surface cracks

The forks should be inspected visually, and if necessary, non-destructive testing methods should be used to check for cracks. Special attention should be paid to the fork root, upper hook, and lower hook (including its connection with the vertical section). If there is a crack on the surface of the fork, it must be stopped.

5.3 Fork tip height difference

When a set of forks are installed on the fork frame, the height difference between the two fork tips should be checked. If the fork tip height difference exceeds 3% of the length of the horizontal section or the value recommended by the forklift manufacturer, the group of forks must be stopped.

The forks of this group shall not be put into use before necessary adjustments (see 6.1) and tests in accordance with 6.2 are carried out.

5.4 Position lock

It should be ensured that the positioning lock is in good maintenance and normal working condition in the original position. If any malfunction is found, the fork must be stopped before a good repair.

5.5 Marking clarity

The fork mark should meet the requirements of GB/T 5182. If the mark is not clear, the fork must be stopped.

5.6 Wear of forks

5.6.1 Horizontal and vertical sections of forks

The level of wear of the horizontal and vertical sections of the forks should be checked, especially the roots of the forks.

If the thickness of the horizontal and vertical sections of the fork is reduced to 90% of the design thickness of the fork, or the minimum thickness specified by the fork manufacturer, the fork must be stopped.

5.6.2 Installation of forks

The load bearing surface of the upper hook of the fork and the positioning surface of the upper and lower hooks should be inspected for wear, squeeze and other local deformations. If these defects are obvious and the gap between the fork and the fork frame becomes too large, the fork must be stopped. For other installation forms, similar inspections should also be carried out.