巻号一覧
18 巻, 3 号
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川村 登1956 年 18 巻 3 号 p. 89-92
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーWith using the transfer matrix method, a dynamic analysis of the automatic draft control system with hydraulically controlled three-point linkage (Frguson system) was done by auther.
Transfer matrixes of the mechaical elements represented with force-displacement mobilities easily introduced the control equation of the system. To prevent “hunting” of the system and to stabilize the draft and the tillage depth, frequency and inditial responses were studied and numerical examples were shown.抄録全体を表示PDF形式でダウンロード (645K) -
森田 昇, 田谷 暢久1956 年 18 巻 3 号 p. 93-96
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーSurveying the relation of the draft resistance, the vertical suction and the cutting angle, we obtained the following results.
The draft resistance did not be varied by the increase of the suction.
The draft resistance not related to the suction, but it enlarged with the increase of the cutting angle.
On the field, we used the plow that added to 10 kg weights on the center of gravity and that not added the weight, and the working depth was increased by adjustment of the hitch.
The min. specific resistance was 0.33Kg/cm2 in the range of 9-10cm depth on the no-load plow, but 0.32Kg/cm2 in the range of 13-14cm depth on the 10kg loaded plow.
Wb/a tanθ=H was formed of on this equilibrium point; that is the min. point of specific resistance.
We found that its weight and the position of the center of gravity had important connection with the deep plowing, and one of cause that the specific resistance increased with the working depth, was due to the increase of the cutting angle of the plow.抄録全体を表示PDF形式でダウンロード (713K) -
1956 年 18 巻 3 号 p. 96-96,120
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (365K) -
杉 宏三1956 年 18 巻 3 号 p. 97-100
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーThe results were as follows.
1. There exist three types of the wear characteristic curve on the wear of every tine in the wear of tines of the power tillers.
2. The relation between the wear of tine (W) and the cultivated depth (D), the vickers hardness of tine (carbon steel<700Hv) be able to express in the formula of
W=k⋅D3/Hv……(3)
3. In the field test, the flat knife tine wore away much more than the ordinary tine.抄録全体を表示PDF形式でダウンロード (652K) -
小林 潤1956 年 18 巻 3 号 p. 101-104
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーIt is the big problem which should be considered together with the study on farming machineries, especially cultivating machinery which have attained a remarkable improvement and development in their faculty, then what is the effect on the aggregates structures to be made by the application of the farming machineries.
Meanwhile, as discussed in this paper, there to-fore-adopted methods of experiment is rather unadvisable for the exact comprehension of the status of the aggregates structures, because they often result an unfavourable aggregates dispersion, for which stabilization of the grains is resultantly necessitated.
Comparison has been made with a varied conditions of the soil moisture for each cultivation with the addition of hydrolyzed polyacrylonitrile as a stabilizer, in our experiment which have proved that puddling has a lowest stability of aggregates of both clayey loam and loam for 0.02%, 0.05%and 0.12% additions of the said stabilizer, which are especially prominent for clayer loam, and that for excessive cultivation the alike tendency can also be observed, requring a addition% of stabilizer, considerably different from other normal cultivations.抄録全体を表示PDF形式でダウンロード (746K) -
人力刈取機の負荷特性に関する実験的研究江崎 春雄, 後藤 敏夫1956 年 18 巻 3 号 p. 105-108
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーThe power requirements of hand operated harvesters used for harvesting paddy in Japan were calculated. There are three types of harvesters tested out i.e. N-type, B-type, and S-type.
The strain meter and the oscillograph were used to calculate the power requirement (Fig. 1) and the speedmeter to calculate the cutting speed (Fig. 2).
The following deta were collected (table 1. 2. and 3)
The following conclusions have been derived from the study of the three harvesters.
1) Cutting speed varies with the efficiency of the operator, and the optimum speed should be 1-2m/s.
2) The efficiency of cutting varies with the shape of the cutting blade and the type of harvester used.
3) As the friction coefficient of the harvester on soil surface is a large factor, the study of the shape of the shoe is important as that of the shape of the cutting blade.抄録全体を表示PDF形式でダウンロード (2333K) -
張線張力に関する考察三好 保男1956 年 18 巻 3 号 p. 109-112
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーIt is well known by several experiment that there is a close connection between the tention of wire and the sorting efficiency, and in time the tention of wire are several kgs and less, happen the rice inserting phenomenon immensely and as the result of this much finished rice are found out in the broken rice.
According to my calculation refer to the tention of wire and the weight of grains, it is known that the deflection result from the weight of grains only are few and the rice inserting phenomenon happens by the dynamic motion of grains and the weight of grains promote this phenomenon.
In time, the tention of wire are several kgs and less, the deflection is instable and this prove the result of experiments descrived above.抄録全体を表示PDF形式でダウンロード (610K) -
常松 栄, 吉田 富穂, 長広 仁蔵1956 年 18 巻 3 号 p. 113-115
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (570K) -
ゴムロールの硬度がその脱〓能力に及ぼす影響中村 忠次郎1956 年 18 巻 3 号 p. 116-120
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリー1) This experiment was committed to certify how to effect to hulling power and durability by hardness of Rubber-roll.
2) The relation of hardness of Rubber-roll and hulling power
a) H. P. of Rubber-roll which has hardness of 89-90 degree is needed little more, the rate of hulling is hulling short, the efficency of hulling is high.
b) The difference is no found at carbon adhesion and hulling degree by Rubber-roll which has hardness of 85 degree. The growth of crushing rice is out of question.
3) The relation of hardness of Rubber-roll and durability of Rubber-roll.
a) In this experiment the hardness of Rubber-roll which has 85 degree or so is strongest, and others are not stronger.
b) Vibration and noise of hulling operation are less and pleasant by the Rubber-roll which has 85 degree or so.
They are more violent in 99 degree and most violent and not useful in 95 degree.抄録全体を表示PDF形式でダウンロード (804K) -
川嶋 通義, 小森 盛1956 年 18 巻 3 号 p. 121-123
発行日: 1956/12/25
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (540K)
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