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Volume 18 (1956 - 195･･･
- Issue 4 Pages 125-
- Issue 3 Pages 89-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 18, Issue 3
Displaying 1-10 of 10 articles from this issue
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N. KAWAMURA1956 Volume 18 Issue 3 Pages 89-92
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWith 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.View full abstractDownload PDF (645K) -
N. MORITA, N. TAYA1956 Volume 18 Issue 3 Pages 93-96
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSurveying 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.View full abstractDownload PDF (713K) -
1956 Volume 18 Issue 3 Pages 96-96,120
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (365K) -
H. SUGI1956 Volume 18 Issue 3 Pages 97-100
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe 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.View full abstractDownload PDF (652K) -
J. KOBAYASHI1956 Volume 18 Issue 3 Pages 101-104
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt 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.View full abstractDownload PDF (746K) -
Experimental Analysis for Hand-operated HarvesterH. EZAKI, T. GOTO1956 Volume 18 Issue 3 Pages 105-108
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe 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.View full abstractDownload PDF (2333K) -
The consideration about the tention of wireY. MIYOSHI1956 Volume 18 Issue 3 Pages 109-112
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt 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.View full abstractDownload PDF (610K) -
S. Tsunematsu, T. Yoshida, J. Nagahiro1956 Volume 18 Issue 3 Pages 113-115
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (570K) -
The effect to hulling power by hardness of Rubber-roll used for hullingC. NAKAMURA1956 Volume 18 Issue 3 Pages 116-120
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS1) 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.View full abstractDownload PDF (804K) -
M. KAWASHIMA, S. KOMORI1956 Volume 18 Issue 3 Pages 121-123
Published: December 25, 1956
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (540K)
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