CONCRETE SUPPLY DISTRIBUTER

To contribute to increased efficiency of connection work of masts by quickly and accurately performing the connection work in a concrete supply distributer comprising a base device, a mast device having a plurality of masts supported in an erected state and connected with each other in a vertical line state on the base device, and a boom device mounted on the uppermost mast.SOLUTION: A plurality of connection blocks 21, 21' arranged in a circumferential direction with an interval from each other are fixed to at least one end outer periphery in an axial direction of each mast M. Connection blocks 21, 21' which are respectively fixed to the end outer peripheries being adjacent to each other of a pair of neighboring masts M are in contact with each other. A protrusion 22t and a recess 22d respectively provided in one and the other of the contact faces 22, 22' are engaged with each other so as to position each of the pair of neighboring masts M and suppress positional displacement of the pair of masts M from one another in a direction along the contact faces 22, 22'.SELECTED DRAWING: Figure 10 【課題】ベース装置と、ベース装置上に起立状態で支持され且つ互いに縦列状態で結合される複数のマストを有するマスト装置と、最上位のマスト上に搭載されるブーム装置とを備えたコンクリート供給用デストリビュータにおいて、マスト相互の結合作業を迅速且つ的確に行えるようにして、その結合作業の作業効率アップに寄与する。【解決手段】各々のマストＭの少なくとも軸方向一方の端部外周には、周方向に互いに間隔をおいて並ぶ複数の結合用ブロック２１，２１′が固定され、隣り合う一対のマストＭの、互いに隣接した端部外周にそれぞれ固定の結合用ブロック２１，２１′相互が当接すると共に、その当接面２２，２２′の一方及び他方にそれぞれ設けた凸部２２ｔ及び凹部２２ｄが、該隣り合う一対のマストＭ相互を位置決めし且つ該当接面２２，２２′に沿う方向の一対のマストＭ相互の位置ずれを抑制し得るように互いに係合する。【選択図】 図１０