To provide a mill apparatus and a mortar structure thereof which is compact, while pulverizing a material to be ground with high treatment efficiency and also excellent grain size quality of the obtained pulverized material.SOLUTION: The tea mill 1 to which the present invention is applied comprises a container main body 6 having a locking structure 25 in the vicinity of a lower end opening 6b, a drive shaft 3 rotatably supported on the shaft center 23 thereof, a drive A fixed die assembly 7 in which a first shaft hole 26 through which the shaft 3 is rotatably inserted is drilled and a first die face 27 is disposed toward the lower end opening 6 b, a drive shaft 3 is rotatably inserted A rotary die assembly 8 having a second axial hole 28 formed therein and a second die face 29 disposed so as to face the first die face 27, and a rotary die member 8 which is nonrotatably locked to the drive shaft 3 , A rotation preventing member 10 in which a stirring structure 43 capable of stirring the tea leaves 5 flowing in through the first shaft hole 26 is formed between the shaft portion 33 and the fixed die body 7, and a rotary stopper member 8 And an adjusting nut 9 screwed to a tip threaded portion 3a of the drive shaft 3 projecting from the side of the drive shaft 3. As shown in FIG.(FIG.【課題】コンパクトでありながら、被粉砕物を高い処理効率で粉砕処理し、得られる粉砕物の粒度品質も優れたミル装置とその臼構造を提供することを目的とする。【解決手段】本発明を適用したお茶ミル1は、下端開口6bの近傍に係止構造25を有する容器本体6と、その軸心23上に回動可能に支持される駆動軸3と、駆動軸3が回動可能に挿通される第1軸孔26が穿孔され、第1臼面27が下端開口6bに向けて配置される固定臼体7と、駆動軸3が回動可能に挿通される第2軸孔28が穿孔され、第2臼面29が第1臼面27に臨むように配置される回転臼体8と、回転臼体8を駆動軸3に回動不能に係止し、軸部33と固定臼体7との間に、第1軸孔26から流入する茶葉5を撹拌可能な撹拌構造43が形成される回り止め部材10と、これを貫通して回転臼体8側から突出する駆動軸3の先端ネジ部3aに螺合される調整ナット9とを備えたものである。【選択図】図2
