PROBLEM TO BE SOLVED: To provide an automatic bottom surface watering device having a water storage tank in which all the preparatory work necessary in supplying water to the water storage tank is eliminated, and which is capable of supplying water without considering a troublesome operation procedure.SOLUTION: A wall surface 1-1 and a bottom surface 1-2 of a container 1 are formed in an integral double structure, a lower space in the container 1 surrounded by a water storage tank 2 is used as a water storage section 1-3, and a water supply duct 3 including a water pouring port 3-1 and a water discharging port 3-2 is provided. A contact part between the water storage tank 2 and the water supply duct 3 outer periphery is formed in a sealed structure, a ventilation duct 4 whose upper end 4-1 is opened to an upper space 2-2 in the water storage tank 2 and lower end 4-2 is opened to an area near a lower portion in the water storage section 1-3 is provided, a contact part between the water storage tank 2 and an outer periphery of the ventilation duct 4 is formed in a sealed structure, a water-passing port 5 penetrating from the bottom surface 1-2 of the water storage section into the water storage tank 2 is provided, and a water-passing tool 6 made of water-permeable and water-absorbing resin is installed to the water-passing port 5 in a closely adhered manner.COPYRIGHT: (C)2014,JPO&INPIT【課題】貯水タンクを有する自動底面灌水装置において、貯水タンクへの水の補給時に必要であった準備作業を全て無くし、煩わしい操作手順を考えることなしに水の補給をすることが出来できる自動底面灌水装置を提供する。【解決手段】容器1の壁面1-1及び底面1-2を一体的二重構造にし、貯水タンク2に囲まれた容器内の下方部空間を留水部1-3とし、注水口3-1と出水口3-2を備えた給水ダクト3を設ける。貯水タンク2と給水ダクト3外周との接触部を密閉構造にして、上端4-1が貯水タンク2内の上部空間2-2に開放され、下端4-2が留水部1-3内下方部近傍に開口する通気ダクト4を設け、貯水タンク2と通気ダクト4外周との接触部を密閉構造にし、留水部底面1-2から貯水タンク2内に貫通する通水口5を設け、その通水口5に通水性、吸水性樹脂からなる通水具6を密着し装着させている。【選択図】図2
