| 摘要 |
A hold down device for positioning the drive chain of a roller conveyor in a dryer comprising a mounting bracket, and a wear bar, the mounting bracket being arranged to be mounted on a horizontally extending rigid frame member and having a configuration enabling it to support the wear bar over the path of the reach of a roller chain that is meshed with drive sprockets that are each associated with a respective roller of the conveyor, the mounting bracket being arranged to locate the wear bar in an operative position immediately overlying the chain while the chain is meshed with the roller sprockets, the wear bar being removably mounted on the mounting bracket. In one embodiment the wear bar is an elongated element having a width adapted to be received in the space between a pair of links separated by a roller of the drive chain. The elongated wear bar is carried on a guide which in turn is supported directly on the mounting bracket. The elongated wear bar and guide have complementary slots which, with aligned grooves on the wear bar, permit a simple slip-in self-aligning assembly of the wear bar on the guide. In another embodiment, the wear bar integrates the structure and function of the guide.
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