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Volume 19 (1957 - 195･･･
- Issue 4 Pages 129-
- Issue 3 Pages 89-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 19, Issue 2
Displaying 1-10 of 10 articles from this issue
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S. TSUNEMATSU, Y. IKEUCHI1957 Volume 19 Issue 2 Pages 45-48
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe device is a portable instrument capable of securing average force values. The view of the instrument constructed is shown in picture (left), and basic circuit arrangement in Fig. 1. The terminals a, b, c, and d are to be connected to thecorners of the wheatston's bridge, formed with 4 strain gages. The bridge is energized by 67.5V. dry-cell batteries or 100V. a. c. source.
It was found that for the testing of a garden tractor, a considerably accurate calibration could be obtained. The transducers made in our research group were used.
All necessary equipment and parts can be ob tained for about 4, 000yen.View full abstractDownload PDF (2370K) -
1957 Volume 19 Issue 2 Pages 48-48,84
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (358K) -
J. NAGAHIRO1957 Volume 19 Issue 2 Pages 49-56
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe writer examined on the effect of controlling the maximum quantity of the fuel injected in the small type's constant speed diesel engines, which is mainly used in agricultural machineries, on the decrease of the fuel consumption in the over load range, the improvement of combustion and the working ability of agricultural machineries, carrying the fluctuating load. The results obtained may be summarized as follows;
(1) By means of controlling properly the maximum quantity of the fuel injected, combustion is improved and engines are always changed into the constant torque type and moreover the engine power can be adjusted at will.
(2) The fluctuating load performance of engines, carrying the severe fluctuating load in the agricultural work, coincide with the engine performance of the bench test.
(3) By means of controlling properly the maximum quantity of the fuel injected, the work quantity per unit fuel consumption increase 10-20% in the overload range.View full abstractDownload PDF (4955K) -
On the Effects of Inflated Pressure, Rim Width, Diameter, Additional Weight and Dual Tires on the Performance of Garden Tractor Drive WheelsK. MATSUI1957 Volume 19 Issue 2 Pages 57-61
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe experimens to compare the performance of the garden tractor's wheel were done on the well packed clay loam soil and hard road. The results were summarized as follows:
(1) Inflated pressure of the pneumatic tyre was not so effective on the hard ground.
(2) By adding weight the drawbar pull was increased but the maximum tractive efficiency was decreased on the pneumatic tyre. However on the steel wheel by adding weight the drawbar pull and also the tractive efficiency were increased.
(3) The effect of wheel diameter was much marked on the small dinmeter pneumatic tyre as a garden tractor's wheel.
(4) The drawbar pull of dual tyre was larger than that of single tyre and the tractive efficiencys of them were almost equal.
(5) Wide rim steel wheel could not increase the efficiency and drawbar pull on the hard farm.View full abstractDownload PDF (804K) -
The Static Experiment of Pulverizing ActionS. UMEDA1957 Volume 19 Issue 2 Pages 62-66
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe author studied experimentally the pulverizing action by a rotary tine revolved slowly, and the pulverizing mechanics, the deformation of soil and the shape of slip line were observed in a small soil tank with a glass side window.
The results were obtained as follows:
(1) The pulverization by a ordinary tine is the ductile shear fracture, by a flat knife tine (Natatume) is the brittle tension and ductile shear fracture.
(2) The pulverization and the cultivating resistance are influenced by the form of tine.
(3) The shape of slip line in a part of circular arc and varies with the revolution of tine.
(4) The radius of the slip line is represented by S=R⋅cos(α-θ)/cos(φ+θ-α)View full abstractDownload PDF (783K) -
On the Characteristics of Improved NozzleM. IMAI, T. TAKENAGA, H. NAKAGAWASAI1957 Volume 19 Issue 2 Pages 67-70
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this report we studied on the spraying methods for Horizontal boom nozzles of the motor sprayer. It was good effect that booms has been netted by some nozzle setting angles (about 30-60 degrees)
We found the good conditions on spraying heights and intervals of nozzle, etc, on each pest controls. The deposits of chemicals to the top were about 4-6 times to base of rice plants.
On the results from Report I to III, We concluded the spraying methods of this Horizontal boom.View full abstractDownload PDF (552K) -
Y. KOMATSU1957 Volume 19 Issue 2 Pages 71-74
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to develop hulling ability of rubberroll typed rice huller, author made 3 peculiar hulling mechanism of side-sliding type (B type) which 1 roll slide right and left by cam, and cross axis type (C type) which combine rubber disk and roll, and slant axis type (D type) which 1 roll axis slant to horizon, and compared hulling ability with common type (A type) by experiments.
Obtained following conclusions:
(1) B, C, D type show better ability than A type on the point of view of any supply poses of unhulled rices.
(2) D type show very high hulling percentage (98-99%) on the point of view of horizontal supply pose of rices which other type show the worst ability.
(3) On the continual supplyed experiments, the case of wide gap of 2 rolls, D type show better ability than my expectation, but the case of narrow gap the highest percentage is no more than 97.5%. However on the case which its work and structure are fine, I seem its hulling percentage show nearly 99% as well as concludable by results of basic experiments.
(4) Damage of hulled ricer by D type yield on the gap abour 1mm, as far as narrower it make numerous.
(5) D type show the best hulling ability and its mechanism is comparatively simple, and thenceforth it would be able to expect for practical use.View full abstractDownload PDF (631K) -
On the Change of Temperature of Rubber-Roll and Hullingrate and the Quality of Unhulled Rice by Number of Passing onthe Surface of the Roll.C. NAKAMURA1957 Volume 19 Issue 2 Pages 75-78
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSOn the change of temperature of rubber-roll and Hulling rate and the quality of unhulled rice by number of passing on the surface of the roll.
1. Hulling rate is evidenlty decreased by rising of temperature. Decrease of hulling rate is due to the decrease of rubber-rolls hardness.
2. The cause of friction of rubber-rolls which were exported to the Southern Countries in Asia is not only due to the rising of temperature but also greatly due to paddy, mixtures, variation of roll gaps or using technique.
3. About the unhulled-rice which were got through the selection for once and rub for one, we find carbon adhesion or scratch when rubber-rolls gaps is within 50% of thickness of paddy.
The elements of carbon adhesion or scratch about unhulled-rice are following
i Rate of circular speed of rubber-roll
ii quality of rubber roll
iii gap of rubber-roll
iv dry rate of paddy
v supplying quantity of paddyView full abstractDownload PDF (657K) -
Softness of StrawH. EZAKI, M. IRIE1957 Volume 19 Issue 2 Pages 79-81
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRice stems for the material of straw rope are desired to be soft, but there is no method to measure the degree of softness.
Softness contains compressibility, flexibility, stiffness and other quality.
In order to set up physical scale of softness, we made some apparatuses and tested out them.
(1) The first one is to measure the compressibility of the rice sheaf. (fig. 1)
We measured the rate of shrinkage of the rice sheaf.
(2) The second one is to measure flexibility of straw. (fig. 2)
We measured bending of the free end of straw.
(3) The third one is to measure stiffness of straw. (fig. 3)
We measured torsion stress of the rice straw.
(4) The last one is to calculate the times of twist. (fig. 4)
We twisted the rice straw and inquired the relation between softness and breaking strength.
In this experiment, we softened rice straw by the softening machine of the roll type.
Rice straws were passed from 2 to 30times between two rolls respectively.
The results are as follows.
(1) In the early stage of softening, from 2 to 4 times of pass, (compressibility) and flexibility increase rapidly, and stiffness decreases also rapidly. In the next stage, this tendency become smaller gradually.
(2) It seems too early to decide the physical scale of softness of plants. But in case of rice stems for straw rope, we want to set the physical scale having 5 classes as shown in the table.View full abstractDownload PDF (489K) -
On the Adaptability of Cutters for Silage ProductionM. WAKUI, K. TAKAHASHI, K. IKEDA, T. TSUKIDATE1957 Volume 19 Issue 2 Pages 82-84
Published: September 30, 1957
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAuthors experimented on the adaptability of cylinder type cutters to corn silage production, in order to enlarge the utility of these small cuters.
In view of working efficiency, quality of silageand tastes of cows, it is desirable that in case of corn silage production these cutters are used at the cutting length of about 3cm, when they can deal with about 7, 500kg of soiling corn a day.View full abstractDownload PDF (514K)
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