加工用無支柱トマト栽培の省力化に関する研究(第3報) －試作した果実収穫機(第2号機)について-

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As previously reported, the trial mechanical harvester of processing tomato was constructed at the Laboratory of Experimental Farm, Fac. Agric., Shinshu Univ. in 1973. In order to overcome the deficiencies apparent in the 1973 model, the 1974 model mechanical tomato harvester was continuously designed at the Laboratory of the Olericulture and Floriculture and it was tested in 1974. The results obtained were summarized as follows. 1. The harvester was constructed using a self-propelled crawler frame of a rice combine harvester. The minimum turning radius of the crawler was 2,300mm. The overall length of the mechanical tomato harvester was 6,230mm, 2,530mm in width and 2,030mm in height. The total weight of the machine was 1,180kg. 2. Front mounted bar conveyer was able to dig on the top of the bed about 40mm in depth, so that parts for root cutting were not necessary to be set. Roots were drawn out by the bar conveyer and a feed roller. To reduce pickup loss, vines and fallen fruits were raked out by the front mounted attachment from the furrows and were gatherd to the center of the beds. 3. Sifter was 820mm in width and 1, 520mm in length. Screen of the sifter was made of 12mmφ stainless pipe on 100mm centers and was shaken by rotate crank and rocker of four-bar linkage system with about 225 cycles per minute. The horizontal stroke of the sifter was 70mm, while the values of vertical stroke and locus were varied with the position of the screen. 4. Two cleaning belts were placed beneath the sifter at the 20～22 deg. incline. As the belts moved up, dirts and foreign materials were discharged at the top of these belts while the fruits roll down onto a sorting conveyer. The sorting conveyer was set on the left side of the harvester and two sorters got on near it. Matured fruits were stored in plastic containers and then those were unloaded to field using the rear mounted wheel conveyer. 5. The field tests were conducted mainly for dwalf varieties at the Experimental Farm of Shinshu Univ. Some deficiencies were encountered during the tests. The main problem was the rate of the pickup loss. In flat, wide, clodfree and weedfree beds, fruits could be picked up completely. On the contrary, in the worst field condition, the rate reached to 18.6 percent. Another deficiencies should be eliminate in the next model. 6. It will be considerd that the practical use of mechanical tomato harvester is possible even under such field conditions as intensive culture and the high humidity like in Japan. As the suitable varieties for mechanical harvesting were developed recently, its effect was quite considerable.
信州大学農学部の論文
1974-12-25

著者

有馬博
信州大学農学部附属農場

加工用無支柱トマト栽培の省力化に関する研究(第3報) －試作した果実収穫機(第2号機)について-

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