林业机械 - 便携式链锯前卫 - 尺寸和间隙

[中文适用范围]： 本文件规定了便携式手持链锯上前护手板及其开口的尺寸和间隙。 这些尺寸和间隙确保了护手板提供必要的安全性，护手板既充当操作员的手和锯链之间的防护罩，又充当手动操作链制动器的执行器。 对于带有环绕式手柄的链锯（见图 1），本文件不适用于顶部支架右侧（从后面看）的前手柄部分。 说明 1 顶部支架 2 前手柄 3 后手柄 图 1 — 手柄上有缠绕物的链锯示例 — 后视图 [外文原描述]： This document specifies the dimensions and clearances for front hand-guards and their openings on portable hand-held chain-saws. These dimensions and clearances ensure the necessary safety provided by the hand-guard, which serves as both a shield between the operator's hand and the saw-chain and as an actuator for manually operated chain brakes. For chain-saws with wrap around handles (see Figure 1), this document is not applicable to the portion of the front handle to the right (when viewed from the rear) of the top brace.