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Volume 25 (1963 - 196･･･
- Issue 4 Pages 203-
- Issue 3 Pages 131-
- Issue 2 Pages 67-
- Issue 1 Pages 2-
Volume 25, Issue 2
Displaying 1-14 of 14 articles from this issue
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Case of the two wheeled HandtractorT. TANAKA1963 Volume 25 Issue 2 Pages 67-70
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA part of the weight of the two wheeled hand tractor body are always supported by the handle, rear small wheel or rear attached equipment and the weight distribution to the wheel does not keep constant while this weight distribution affects to the drawbar pull and handle weight embarrasses the operator, usually.
Theoretical estimation of this handle weight, that is, the transfer of the weight distribution was calculated. Handle weight when the tractor has the draw-bar pull P are shown by the equation (8), (9) and (10). Equation (12) shows the weight distribution to the wheel axle. Handle weight when the tractor body inclines with the angle α illustrated in figure 2 is given by the equation (16) and increase or decrease of the handle weight are shown by the equation (17)-(21).
These considerations were all treated under the statical equilibriums and it was assummed that the tractor body was resemblance to the beam having the supporting point at the wheel axle.View full abstractDownload PDF (641K) -
1963 Volume 25 Issue 2 Pages 70
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (159K) -
I. On the Relation between Turning Type and Running DistanceC. IGAKI1963 Volume 25 Issue 2 Pages 71-75
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn case of the tractor plowing, the capacity is affected by the running distance of the tractor, but the main difference of the capacity come out from the distance of futile run of the tractor on the headland, as the working distance is determined by the area of field and the plowing width.
Therefore, on the case of starting from centre of field, we have assorted several turning types of the tractor, and yielded the following formulas for calculating the turning distance.
(Method of turning) (Type of turning)
S-turn
Octopus type
Balloon type
Poppet type
Medusa type
U-turn
E-turn
(Distance of futile run)
ΣS0=8/3πrs
ΣSb=5/3πrs
ΣSp=(sπ+3s-1)r
ΣSm=(sπ+s+1)r
ΣU=u{πr+(u-1)b/2}
ΣEa=(3π+4)2re
ΣEb=4πre
S: number of turning (in 2 r)
U: number of turning (out of 2 r)
E: number of 1 circulationView full abstractDownload PDF (682K) -
Trial Manufacture of Oscillating Subsoiler for Tractors and Its TestS. ENDO1963 Volume 25 Issue 2 Pages 76-82
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA trial manufacture of oscillating subsoiler which is mounted on tractors was done for the study on the effects of oscillation to the subsoiler.
The oscillating mechanism of this subsoiler is shown in Fig. 1. The oscillating standard and chisel are driven by eccentric cam and the pitman which is adjustable its amplitude, frequncy and oscillating direction of chisel point: amplitudes at the chisel point 4.7-27.8mm, frequencies of the chisel 7-35cps and oscillating directions of chisel 0-20degrees.
In the field experiment, the power requirements for driving the traction wheel is reduced about 20-40 percent by the oscillation of chisel, and the oscillating velocity of chisel v is more effective than the tractor velocity V, (V/v<1).
In the region of V/v values of less than 1, the suitable oscillating direction of chisel is 0 degree in view of the power requirements.
On the pulverized soil, the vertical sectional area of the pulverized soil is maximum at the subsoiled depth of 20-30cm. The pulverized ranges of soil (pulverized angle of section) is larger with the subsoiled depth is deeper, and yet its angle is about 50-60 degrees in practical use.
Under these results, the R-II type oscillating subsoiler which is shown in Fig. 11 was made for trial. This subsoiler is used in the amplitude about 1.7mm, the frecency of oscillation 20.7cps, the oscillating direction 0 degrees and the subsoiled depth 15-50cm.
By the results of various tests, it has been proved that this trial subsoiler can be used on the paddy and other fields.View full abstractDownload PDF (4725K) -
S. TSUNEMATSU, K. YOSHIDA, K. MATSUI, E. ISHITANI1963 Volume 25 Issue 2 Pages 83-86
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe pan breaker with three standards was used in this field study. The results of pan-breaking were reported in the Journal of the Society of Agricultural Machinery, Japan, Vo21, No. 2, 1959.
The report mentioned that the power lift of this machine did not work well at the depth over 50cm and the wheels sank at the loose field.
Then the bearing of wheel shaft was repositioned heigher than the original machine, and the length of the wheel shaft arm, hook levers and the width of the wheel tires was increased as indicated in Table 1
As the result of reconstruction, this machine breaked and loosened hard layers of soil successfully at the depth over 60cm, at the old grass land in Konsen reigion, Hokkaido. And the results of drawbar test were shown in Table 2. Then it was possible to be lifted out of the ground at even 76cm depth and the wheel did not sink so deep on the loose soil.View full abstractDownload PDF (664K) -
S. TSUNEMATSU, T. YOSHIDA, S. NAMBU1963 Volume 25 Issue 2 Pages 87-94
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper reports results of studies on the relations between the lasting effects of pan-breaking and the freezing action of soil, which were carried out on the 22nd-24th of March, 1961, at TOKOTAN region in Konsen, Hokkaido. In these plots, the pan-breaking was practised in the year before last (1959) and the last year (1960). The results are as follows;
1) Generally the depth of the frozen soil in the treated plots seems to be deeper than the depth in the untreated plots.
2) In the treated plots, the distribution of ice crystals in the frozen soil is comparatively sparse. While in the untreated plots, they are rich and the considerable parts of them appear themselves near the soil suface.
3) However, both in the treated and untreated plots, ice plates or pillars have been formed at the depth of about 5-15cm below the soil surface. Consequently, it can be thought that the hard pan will be formed just above and below the layer of ice pillars.
4) On the observation of ice distribution in the frozen soil, it became clear that, even in the treated plots, if the penetration was deep (depth 60cm) the permeability of rain water through the layer at 20-35cm depth was inferior to the shallow penetration (depth 30cm). In the double treated plots (60cm and 30cm depth), the permeability was adequate from the surface to the bottom.View full abstractDownload PDF (1562K) -
On the Wear of Roller Rump Caused by Using Urine of Dairy CowY. CHUMA1963 Volume 25 Issue 2 Pages 95-97
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe wear of roller pump, using urine of dairy cow, was experimented and the following results were obtained.
(1) The total amount of wear of the clearance between rotor and side-wall, using urine of dairy cow, is about 1/10 compared with one caused by Bordeaux mixture (6-6). (cf. Fig. 3-4).
(2) The amount of wear of each part is remarkable with the higher delivery pressure
(3) The amount of wear of each part of pump was compared.View full abstractDownload PDF (1991K) -
On the Expansions of Plastic Rollers Immersed in the LiquidY. CHUMA1963 Volume 25 Issue 2 Pages 98-100
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe expansions of six kinds of rollers made of plastic synthetic materials, immersed in the liquid (water and urine of dairy cow), were investigated through 400 hours.
Diameters of rollers increase with immersed time and water pressure, and increase a little more in the urine of dairy cow than water.
These are especially remarkable in the case of “LIGNITE” and “NYLON” rollers.
And these tendencies are the same on the length, volume, and weight of rollers too.View full abstractDownload PDF (431K) -
Y. KODAMA1963 Volume 25 Issue 2 Pages 101-103
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS1. Since the coefficient of discharge of the orifice is the function of Reynolds number, the author expected that this relation may be realized in the nozzle for sprayer and with respect to one of nozzles the author investigated the relation tune between the coefficient of discharge and Reynolds number by means of experiments. This curve can be applied to liquids having different viscosities by Reynolds' law of similarity.
2. The results of the experiments showed that the coefficient of discharge is 0.389-0.312 in case where Reynolds number is 0.8×104-3.3×104 and the author found that the coefficient decreases with increase of Reynolds number.View full abstractDownload PDF (397K) -
I. NISHIMURA1963 Volume 25 Issue 2 Pages 104-106
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe relation between spray particles of triple-nozzle spray guns and its spray deposited was studied. The spray particles were larger in mean diameter than in common-use cone nozzle, and also seemed to have a larger diameter with increase of the range of deposit from nozzle orifices.View full abstractDownload PDF (444K) -
A Comparison of Performances between a Kerosene Dryer and a LP Gas DryerA. HOSOKAWA1963 Volume 25 Issue 2 Pages 107-112
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSExperiments were made for a comparison of performances between two hay dryers, one with a kerosene burner and the other with a propane heater. Mixed hay with 80% red clover and 20% timothy was used. The findings were as follows.
1. The propane dryer, in general, showed higher thermal efficiencies than the kerosene dryer. The difference in thermal efficiencies seemed to have come from the differences in dryer box design, which brought about different material bed depths, bulk densities, flow rates of heated air per unit floor area and static pressures. Many unknowns, which further have to be investigated, prevented the author from securing the optimum operation of the dryers from the standpoint of fuel and time economy.
2. Using hay which had been field-cured to 35-40% moisture content (wet basis), and making 10tons of hay annually, both fuel and depreciation costs of either dryer were approximately the same, the total being 3.15yen per kilogram of dried hay.
3. The capacity of either: drier was too small for efficient hay making in Hokkaido. For those farmers who prepare 10tons of hay for five cows a year, a double size may be desirable and for those with ten cows, a quadruple size seems to be necessary.View full abstractDownload PDF (1046K) -
Design, Construction and Performance Tests of a Simple Heat Exchanger for a Hay Dryer with Heated AirA. HOSOKAWA1963 Volume 25 Issue 2 Pages 113-118
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the previous report (Studies on Hay Dryers with Heated Air, (I)) the fuel cost was about 1.65yen per kilogram of dried hay, whereas the depreciation cost was 1.50 yen, in case field cured hay with 35-40% moisture content (wet basis) was used and about 10tons of hay were prepared annually. Recirculation of exhaust gas is one of the methods to increase the overall thermal efficiency and reduce the operation cost. The LP gas dryer which showed a better thermal efficiency in the previous report, however, maintained its exhaust moisture content at nearly 100% for 1/2-2/3 of the operating time which was about one hour and the high moisture content seemed adverse to a recirculation system. A simple plate type heat exchanger consisting of 23 zinc-coated roofing iron sheets was designed and tested with the LP gas dryer without any change in the heater and blower unit. About 20% of heat saving was obtained with it. Since there is a possibility of making the exchanger a compact unit for saving construction material and installation space, further improvement and experiments are intended in the future.View full abstractDownload PDF (2508K) -
[in Japanese]1963 Volume 25 Issue 2 Pages 119-122
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (680K) -
1963 Volume 25 Issue 2 Pages 123-127
Published: September 30, 1963
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (987K)
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