The reaping machine for harvesting rice, barley and wheat named “Mie Univ. type No. 2” has been designed and made for trial at Mie University in 1955, aiming at to improve its stalk gathering apparatus so as to make adaptable to our field operations. The reaper was experimentally operated attaching A- or B-type stalk gathering apparatus for harvesting lowland rice, barley and wheat. The results are summalized as follows: a. Driving the reaper attached A-type stalk gathering apparatus, consisting of a reel, guide plates and a stem divider, barley and wheat are reaped and gathered with success. b. The result is not always satisfactory, varying widely with the mode of cultivation, for harvesting lowland rice with the reaper attached either A-or B-type stalk gathering apparatus. Refering to the results obtained through field tests, the following points should be taken into account for invention of a new type stalk gathering apparatus, with which a Japanese type reaper be equipped. 1. It is impossible to divide stalks of lowland rice into bundle with rotatory apparatus, which rotate to the same direction even if it was in an intermitted motion. 2. Stalks of lowland rice can not be divided into bundle as far as they are floating in air. Thereby, a part of the stalks must be perfectly separated from the remaining part, holding it on the cutter bar.
Up to last year we had designed and turned out three types of harvesters. They are the windrower type; i. e. E52 E54 and E55. (Journal of the society of agricultural machinery, Japan, V15. No3, V16. No1. Journal of the Kanto Tosan experiment station No. 7) These windrowers were found to be defective when tried out in the field. In 1955, two improved types of windrowers were designed and turned out i. e. HR553 and HR555 as shown in Fig 1; and tested out in the field. These windrowers are equiped with a 2_??_ engine, 2 wheels, monotype frame, conical reel, lay out bar and 12″ reciprocating cutter bar. The new machines are suitable for harvesting rice and wheat under good field conditions; and not practical in a wetty field. The new attachment to these machines have been found to be very useful in field test. Our next ambition will be to design and construct a harvester to collect the plants into sheaves.
As alredy of published in the Journal of the Society of Agricultural Machinery in Japan in V. 16 and 17, we have reported the trials made by us on the Rotary Mower. We have now tested on the efficiency and the power consumption of about 60 different types of horizontal and vertical plates of the Rotary Mower both in the field and in the laboratory. (Fig. 1 and Table 1.) The equation showing the power required to move air of the rotary cutter is given below. _??_=K(n/1, 000)β n: R. P. M. of rotary cutter, K: Coefficient. (See Table 2) _??_: Power required to move air, The following conclusion were made on the above study (1) The circular type of arm required little power than the spiral arm or the straight arm. (2) The increased power requirement was proportional to the diameter of the cutter and the height of the vertical plate. (2) The power decrease was proportional to the number of arms. On a field test of cutting Chinese Milk Vetch the following observations were made. (1) The action of the cutter with the vertical plate is to cut and make windrows. The peripheral speed of the cutter required 10m/s for cutting vetch, but this speed is not sufficent to make windrows. (2) The ideal peripheral speed of harvesting vetch is about 15m/s. (3) In comparing the action of the circular type of cutter with the spiral type having the same diameter, it was observed that the former required less speed and less power. (4) It was also found out, that if the height of the vertical plate was more than 40mm, it was capable of doing better work. A power test was carried out in harvesting of green soyabean and sweet potato vain. The horse power requirement for harvesting the above two crops is given below, when the machine was found to be moving at 0.5m/s the horse power requirement was determined with the help of the DPM type Strainmeter. (A) Power requirement for harvesting green soyabean 1.2_??_ (B) Power requirement for harvesting sweet potato vine 0.5_??_.
(1) Two dimensional force to Plowbody is calculated in this paper, considering about transmitted force (cf. Report II). (2) The x, y components of force to Plowbody, Wx, Wy, will influence traction force. Q=Wx+μWy is included in the equation of traction force, so Q is called Plowbody resistance, say. Q will be got by equation (3) in decimal form. (3) As Plowbody curve is represented by simple curve or connected curve (cf. Report I), Q will be got by equation (4) or (5) respectively. (4) By some calculation as to some Plowbody curves, Q will increase as radius of curvature at share point, Plowbody height increase or share angle decrease respectively. (5) A design of two dimensional Plowbody curve is illustrated, and Plowbody resistance, traction force and average radius of curvature about designed curve are examined.
We made out four sorts of diffusers in diameter 53/4″ 61/2″, 73/4″ and 81/2″ and also made an experiment on the hulling powers in the following two cases: one that is assorted a high speed and great diameter roll with a low speed and little diameter one; the other, on the contrary a high speed but little diameter roll with a low speed but great diameter one.
1. Under the same r. p. m., the greater diameter of runner grows, the bigger lifting capacity becomes 2. The lifting efficiency is improved as the diameter of runner increases. 3. The influence of the diameter of runner over the damage of lifted grain is not evident.
For the purpose it makes clearly that the distinctive character of each nozzle types which atomized mechanism is differ, the first, selected 1. atomization 2. arriving force 3. dispersion 4. distribution 5. adhesion 6. sticknees & loss, as the characteristics of the nozzle of chemicals spraying. And next, compared with the spray drops by no air injection the mist drops by air injection, and the fog drops by exhaust gas injection with regard to the characteristics of its atomization and adhesion mechanism, each others. Its result was reconsidered that the characteristics of nozzle is related to the nozzle structure, injective pressure or blower pressure, and the property of chemicals, and a figure of plants or crops, method of culture.
(1) It is not recognized that the difference of the form of sand and silt between the volcanic light soils and un-volcanic light soils. (2) The form of clay minerals has disatinction little among the each test soils as shown: Electron micrograph (1) - (5). (3) Judging to the result of the Erectron microscopy and the defferential thermal curve, clay of the volcanic light soils in general contains Allophane, while un-volcanic soils contain Hydrated halloysite. But I recognized the qualitative difference among the clay minerals, yet do not clear up differece of form of the clay mineral particles. It may be some particulations between the form of soil particles and stickiness, as still more I intend to research for the soil particles.
We have been so far, in many cases, applying a simple sketch for the description of the shapes of furrow—or ridge section, but now we have come to construct an automatic controller to record the shapes automatically with accuracy and swiftness. The way it works is as follows; the point of a needle, connected with the grid circuit of a sharp cut-off vaccum tube, tracks the soil surface in continuance vibration, while it is controlled automatically by the joint motion of relay and muter. The present roport, based on this principle, derives from the theory of control the conditions to keep the system in steady and swift motion and shows the data of actual measurement by a trial manufacture.