Importance

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Abstract

The present invention is designed to perform a primary crushing operation including hooking and crushing of the top face part of waste through cooperation of a supporting projection and a first crushing roller. The first crushing roller also conveys the waste. A secondary crushing operation includes crushing of a bottom face part and the top face part of the waste W, while lifting the waste is performed by the first crushing roller and a second crushing roller. And, a tertiary crushing operation including crushing of the object material, that is to be crushed, into small pieces and discharging of these pieces separately from the materials that are unfit for crushing is performed by the second crushing roller and a third crushing roller. The primary crushing operation, secondary crushing operation and tertiary crushing operation are performed one after another, for the purpose of separating and discharging materials that are unfit for crushing without deforming them, and accurately crushing the object material such as frame member, etc., even if the waste is directly submitted to the crushing operations without removing the materials that are unfit for crushing such as a motor, compressor, etc. The recovery ratio of valuables is thus improved upon.

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First Claim