Clarke J B, Dalby W, Gunn J F
Scand J Work Environ Health. 1986 Aug;12(4 Spec No):351-4. doi: 10.5271/sjweh.2130.
An investigation was carried out to determine the factors influencing the vibration of chipping hammers and to find ways of reducing the vibration at the operator's hand. It showed that substantially higher vibration levels are produced at the chisel of a chipping hammer than at its handle. Typical weighted values for the two areas were 24 and 8 m/s2, respectively. This finding agrees with medical observations showing that invariably the hand holding the chisel exhibits the more severe symptoms of vibration-induced white finger. A sleeve which fits onto the chisel was developed which can effect a reduction in vibration of up to 66%. A prototype hammer was developed incorporating an isolating material which reduced the weighted vibration value from 7 to 3 m/s2. Vibration isolating gloves were tested and resulted in an additional reduction in vibration of up to 63% when used with the chisel sleeve. A unique mounting device using rubber isolators was designed which protects the accelerometer from very intense high-frequency vibration but allows accurate measurement of chisel vibration in the frequency range of interest.
开展了一项调查，以确定影响錾锤振动的因素，并找出减少操作人员手部振动的方法。结果表明，錾锤的凿子处产生的振动水平远高于其手柄处。这两个部位的典型加权值分别为24和8米/秒²。这一发现与医学观察结果一致，即握持凿子的手总是表现出更严重的振动性白指症状。开发了一种套在凿子上的套筒，可将振动降低多达66%。还开发了一种原型锤，其中包含一种隔离材料，可将加权振动值从7米/秒²降至3米/秒²。对隔振手套进行了测试，当与凿子套筒一起使用时，可使振动进一步降低多达63%。设计了一种独特的使用橡胶隔离器的安装装置，可保护加速度计免受非常强烈的高频振动影响，但能在感兴趣的频率范围内准确测量凿子的振动。
