巻号一覧
26 巻, 1 号
選択された号の論文の15件中1～15を表示しています
- |<
- <
- 1
- >
- >|
-
1964 年 26 巻 1 号 p. 1-3
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (611K) -
1964 年 26 巻 1 号 p. 4
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2110K) -
車輪による土の変形の考察およびラグの沈下増田 正三, 田中 孝1964 年 26 巻 1 号 p. 5-8
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーAs the fundamental researches to evaluate the performances of the running elements of the tractor, especially, the rigid steel wheel constructed by the plate lugs which has been usually used on paddy soft field, the deformation, compressibility of the soil, sinkage of any point of lug surface, etc. were studied prior to get the reaction forces of soil to the lug plate.抄録全体を表示PDF形式でダウンロード (628K) -
ラグ面上の応力分布ならびに荷重との関係についての理論的考察増田 正三, 田中 孝1964 年 26 巻 1 号 p. 9-13
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーTo improve the performances of the running elements of the farm tractor on the paddy soft soil, the stress distributions in the soil near the rigid lug of the wheel were studied in conformity with M. G. Bekker's equation. The normal and shearing stress on the lug surface were accounted for from that results and the relations of stresses to the lug loads, shapes and the soil conditions were found by the theoretical analysis.抄録全体を表示PDF形式でダウンロード (635K) -
LPガス用異径ベンチュリによる機関性能の比較増田 正三, 竹内 龍三1964 年 26 巻 1 号 p. 14-18
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーIn this report, the engine performance were compared by five different diameter of carburetter venturi which are used both for LP Gas fuel and gasoline fuel. Following results were obtained.
(1) At the maximum output, the performance of 20mm diameter venturi was higher than the others on gasoline and LP Gas fuel. Generally, small diameter venturi were not good. The LP Gas fuel and large diameter of venturi were good in the limit of maximum output, and effective range was 6-10PS.
(2) According to the three dimentional curve (solid curve) among output, fuel consumption and venturi diameter, there was no correlation between gasoline and LP Gas fuel, but 22mm and 24mm dia. venturis were good.
(3) On the costs of fuel consumption, 20mm dia. venturi was the cheapest, and large diameter ones were suitable for both fuel. The cost of gasoline was higher than LP Gas fuel by 10yen/PS-hr at the minimum cost of fuel consumption.
(4) On the relation between supreme adequate outputs and costs of fuel consumption on solid curve, the performance was good when the curve has no snake type properties. Therefore the large diameters were surpassing.
(5) On the mixture ratio of fuel and excess air ratio, gasoline was better than LP Gas fuel. Generally, the mixture ratio was high at low output in the case of gasoline and at high output in the case of LP Gas. On all output condition, we wished that gasoline might be used by half load, but LP Gas might be enlarged the all range.
As the result of this report, we found 22mm of venturi diameter was best through every experiments, and LP Gas venturi throat had to be 10% smaller than the air inlet pipe of gasoline engine.抄録全体を表示PDF形式でダウンロード (777K) -
空冷および水冷ディーゼルエンジンにおけるオイルの劣化について竹田 策三1964 年 26 巻 1 号 p. 19-26
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーThe authors investigated the field test of A-3 air cooled diesel engine oil.
Oil was good enough after 75 hours of operation, when we tried to supply the multigrade additive type engine oil fully, in the condition of light works.抄録全体を表示PDF形式でダウンロード (2901K) -
空冷および水冷ディーゼルエンジンにおけるオイルの劣化について竹田 策三1964 年 26 巻 1 号 p. 27-29
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーIn bulldozer (Water cooled 4cycle Diesel engine), the time of exchanging oil was about every 120 hours.
But, when Series-3 oil was used with an engine of good condition, the exchange of oil could be extended to every 150 hours.抄録全体を表示PDF形式でダウンロード (409K) -
犂の牽引抵抗6分力手塚 右門, 小中 俊雄1964 年 26 巻 1 号 p. 30-34
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーThe six components of draft of Japanese plow were measured by using the six components measuring device.
The results about two bottom Japanese plow, were as follows:
The horizontal force Px was 109kg, the side force Py was 42kg, the vertical-force Pz was 21kg and the residual moment was 145kg·cm on loam soil (plowing depth was 15cm). (Fig. 2·3·4·15)
The specific resistance on loam soil is larger than on loamy sand soil, which is larger than on volcanic sandy loam soil. (Fig 5·6·7)
The centers of resistance are distributed upon plow surface, 1/2-3/4 of plowing depth and 1/3-1/4 of plowing width to right hand from the shear edge. (Fig. 13)抄録全体を表示PDF形式でダウンロード (774K) -
昭和37年度北大試験地における調査結果常松 栄, 吉田 富穂, 池内 義則, 南部 悟1964 年 26 巻 1 号 p. 35-39
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーFollowing the report “Studies on the Available Use of Pan-breaker” Part VIII, this is the report on the results of investigation carried out in 1962, the fourth year after pan-breaking treatment.
On the treated plots, the lowest penetrative resistance of the subsoil was 5-20kg at the depth of 50-60cm, showing that the passage trace of chisels has been existed for four years. But, it was found that soil compaction caused by tractor and other equipments had evidently reduced the lasting effects of pan breaking.
Porosity and penetrative resistance of the untreated subsoil were 57-58% and 30-35kg, respectively. These data were obtained both in May and November.
Top growth and root yields of beet crop were 0.5 ton per 10a higher on the treated plots than that on the untreated plots.抄録全体を表示PDF形式でダウンロード (891K) -
1964 年 26 巻 1 号 p. 39
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (140K) -
双用プラウによる走行距離について居垣 千尋1964 年 26 巻 1 号 p. 40-44
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーThe utilization of the reversible plow will be increased in furture. The reversible plows can be divided into the following types.
1. Moldboard plow.
(1) Bilateral symmetry reversible type.
(2) Bilateral symmetry roll-over type.
(3) Up-down symmetry roll-over type.
(4) Up-down symmetry turn-over type.
(5) Front-rear symmetry reversible type.
2. Disk plow.
(6) Up-down symmetry roll-over type.
(7) Disk supporting axis roll-over type.
Using these plows, the types of turning and the distance of futile run are as follows.
(1) Octopus type ΣSo″=(3-7/3)πrB/b
(2) Balloon type. ΣSb″=(7/3-1)πrB/b
(3) Poppet type. ΣSp″=(πr+2r+b)B/b
(4) Medusa type. ΣSm″=(πr+2r-b)B/b
(5) Cycloid type. ΣSc″={π(2r+b/2)+b}B/2b
B; the short side of field.
r; the minimum turning radius.
b; plowing width.
m; the number of dividing field (on short side)
Therefore, the distance of futile run is in the order as,
ΣSc″<ΣSm″<ΣSp″<Σ<ΣSb″<ΣSo″
Next, the method and the distance that we treat the head-land are divided into two ways by the attachment which we use.
Using S-turn.
(1) Over-line turning method. ΣHo″=ΣS″
(2) Additional plowing method. (A)
ΣHa″=ΣS″+2l⋅B/b
(3) Additional plowing method. (B)
ΣHb″=(S″+2l)⋅2l/b
(4) Combinative plowing method. ΣHc″=B⋅2l/b
l; width of head-land.
L; length of tractor body.
Not using S-turn.
(1) Over-line turning method. ΣHo″=L⋅B/b
(2) Additional plowing method. (A)ΣHa″=2l⋅B/b
At last, on the case of using reversible plow, the all distance of futile run is shown into the following formulas by combining the aforesaid turning method with the distance of futile run between treating head-land.
Using S-turn.
(1) Utilization of over-line turning method.ΣS″
(2) Utilization of additional plowing method. (A)
ΣS″+2l⋅B/b
(3) Utilization of addtional plowing method. (B)
ΣS″+(S″+2l)⋅2l/b+A
(4) Utilization of combinative plowimg method.
ΣS″+B⋅2l/b+A
When S-turn is not used, the formulas are equal to the case of treating head-land. Therefore, when we use front-rear symmetry reversible type, the distance of futile run is minimum but we need the large field to use this type. Using the general S-turn, its order is as follows.
ΣH0″<ΣHa″<ΣS″+ΣHc″<ΣS″+ΣHb″抄録全体を表示PDF形式でダウンロード (696K) -
熱線風速計の試作森嶋 博1964 年 26 巻 1 号 p. 45-51
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリー(1) In order to survey the distribution of mean wind velocity and intensity of turbulence in the winnower, a set of recordihg hot wire anemometer is built.
(2) The anemometer consists of a pair of platinum hot wire with the diameter of 0.025mm, a bridge circuit, a D-C amplifier and a recorder.
(3) The measurement of mean wind velocily is done by means of so called constant resistance method, and the turbulence by constant current method.
(4) A calibrating wind tunnel, composed of a fan, guide tunnels, an orifice, a tapered tunnel, a measuring tunnel and a strainer, is constructed to calibrate the anemometer.
Calibration is performed by comparing the reading of the anemometer with that of the pressure difference led from the orifice, which had already been calibrated by comparing with the standard Pitot-static tube.
(5) The reading of mean wind velocity gotten by the anemometer may include the error estimated as 2.5%.
(6) The altitude of output may include the error evaluated as 4.0% caused by the imperfection of the compensation to the characteristics of hot wire, when frequency of turbulence is 50c/s.
(7) The error derived from the non-linierity may occur if the altitude of turbulence grows more thon ±0.7m/s.
(8) The pen-writng oscillograph is employed for the reason of the convenience of handling. In this case if the error which amounts to ±10% is permissible, the frequency range of DC-50c/s is measurable.抄録全体を表示PDF形式でダウンロード (2762K) -
小泉 武紀1964 年 26 巻 1 号 p. 52-57
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (886K) -
1964 年 26 巻 1 号 p. 58-62
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (994K) -
1964 年 26 巻 1 号 p. 63-66
発行日: 1964/06/30
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (723K)
- |<
- <
- 1
- >
- >|