To provide a mortar or concrete spraying apparatus capable of surely and smoothly spraying mortar or concrete even if the mortar or concrete has to be conveyed over a long distance.
The mortar or concrete splaying apparatus D separately pressure-feeds aggregate 1 and cement milk 6 to constitute mortar M or concrete, mixes them and sprays the resulting mixture, and comprises an aggregate pressure-feeding unit 2 for pressure-feeding the aggregate 1 and a conveyance pipe 8 connected with the aggregate pressure-feeing unit 2. The aggregate pressure-feeding unit 2 comprises a vessel 11 accommodating the aggregate 1 and a feeding section 15 provided below the vessel 11 in communication with the interior of the vessel 11 through a communication port 14 and connected with the conveyance pipe 8. The aggregate 1 falling from the interior of the vessel 11 is allowed to pass through the communication port 14 formed in the bottom wall of the vessel 11, and is dropped to the feeding section 15 and fed into the conveyance pipe 8. The communication port 14 has an opening area not larger than the area of the passage inside the conveyance pipe 8.
SUGIMOTO KATSUHIRO
FUJISHIMA YASUYOSHI
SAKAMOTO SATORU
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