JP3137438U

JP3137438U - Abacus

Info

Publication number: JP3137438U
Application number: JP2007007110U
Authority: JP
Inventors: トモエ藤本
Original assignee: トモエ算盤株式会社
Priority date: 2007-09-13
Filing date: 2007-09-13
Publication date: 2007-11-22
Anticipated expiration: 2017-09-13

Abstract

【課題】そろばんの玉が落下したり、みだりに移動したりすることを防止する。
【解決手段】そろばん本体の底板５に接して弾性体11を設け、ほぼ楕円体状の玉10を軸9に貫挿し、玉の断面における曲線状部分の全部又は一部を弾性体の内部に向けて所定深さ(ｄ)だけ進入させた位置関係とし、玉と弾性体との接触面間に摩擦力を発生させることにより玉が落下したりみだりに移動するのを防ぐ。
【選択図】図２[PROBLEMS] To prevent an abacus ball from falling or moving unnecessarily.
An elastic body 11 is provided in contact with a bottom plate 5 of an abacus main body, a ball 10 having a substantially elliptical shape is inserted into a shaft 9, and all or a part of a curved portion in the cross section of the ball is placed inside the elastic body. A positional relationship of a predetermined depth (d) toward the surface is used, and a frictional force is generated between the contact surfaces of the ball and the elastic body to prevent the ball from falling or moving to the edge.
[Selection] Figure 2

Description

本考案は、多目的に使用することができるそろばんに関するものである。 The present invention relates to an abacus that can be used for multiple purposes.

いわゆる四つ玉そろばんは1940年ごろから普及したものであるが、それ以来さして大きい変化や改良は見られなかったのが実情である。 The so-called four-ball abacus has been popular since about 1940, but since then there has been no significant change or improvement since then.

本考案は、廉価かつ実用的な計算器であるそろばんの機能に、さらに講習会や学校における学習用や教授用としても利用可能であり、老人等の手の不自由な方でも利用可能な機能を付加したものである。 The present invention can be used for the abacus, which is an inexpensive and practical calculator, as well as for learning and teaching in workshops and schools, and for those who are handicapped such as the elderly. Is added.

本考案に係るそろばんは、そろばん本体の底板に接して弾性体を設け、ほぼ楕円体状の玉を軸に貫挿し、玉の断面における曲線状部分の全部又は一部を弾性体の内部に向けて所定深さだけ進入させた位置関係とし、玉と弾性体との接触面間に摩擦力を発生させることにより玉が落下したりみだりに移動するのを防ぐことを特徴とする。 The abacus according to the present invention is provided with an elastic body in contact with the bottom plate of the abacus main body, and an approximately ellipsoidal ball is inserted through the shaft, and all or a part of the curved portion in the ball cross section is directed to the inside of the elastic body. In this case, the ball is prevented from falling or moving swiftly by generating a frictional force between the contact surfaces of the ball and the elastic body.

本考案の最も重要な特徴は、底板５に柔軟な弾性体11、例えばスポンジ、を設けた点にある。図２は玉10と弾性体11との関係を模式的に示す説明図であって、玉１０の右半分の一部が所定深さｄだけ弾性体１１の内部へ押し込まれている状態を示す。そうすると、玉10と弾性体11とが接触している面の間に摩擦力が発生しているから、そろばんを垂直の姿勢で使用する場合、接触面のうちのＳの部分に発生している摩擦力が玉１０の重量を支持する結果、玉10は落下することなく原位置に保持される。 The most important feature of the present invention is that the bottom plate 5 is provided with a flexible elastic body 11, such as a sponge. FIG. 2 is an explanatory view schematically showing the relationship between the ball 10 and the elastic body 11, and shows a state where a part of the right half of the ball 10 is pushed into the elastic body 11 by a predetermined depth d. . Then, since a frictional force is generated between the surfaces where the ball 10 and the elastic body 11 are in contact, when the abacus is used in a vertical posture, it is generated in the portion S of the contact surface. As a result of the frictional force supporting the weight of the ball 10, the ball 10 is held in place without dropping.

本考案を実施するための最良の形態としての一実施例を以下添付図面に従って説明する。
そろばん本体１は上板２、下板３、側板４、４、底板５から成る。側板４、４の間に上板２に平行に梁６が設けられ、上板２と梁６との間に上部区画７が形成される。梁６と下板３との間には下部区画８が形成される。上板２と下板３との間には側板４、４に平行に多数の軸９、９…が立設され、軸９の上端は上板２に取り付けられ、軸９は梁６を貫通して、その下端は下板３に取り付けられている。上部区画７内の軸９には、１個の玉10が貫挿され、下部区画８内の軸９には４個の玉10が貫挿されている。 An embodiment as the best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
The abacus body 1 includes an upper plate 2, a lower plate 3, side plates 4, 4 and a bottom plate 5. A beam 6 is provided between the side plates 4 and 4 in parallel with the upper plate 2, and an upper section 7 is formed between the upper plate 2 and the beam 6. A lower section 8 is formed between the beam 6 and the lower plate 3. Between the upper plate 2 and the lower plate 3, a large number of shafts 9, 9... Are erected in parallel with the side plates 4, 4. The upper end of the shaft 9 is attached to the upper plate 2, and the shaft 9 penetrates the beam 6. And the lower end is attached to the lower board 3. One ball 10 is inserted through the shaft 9 in the upper section 7, and four balls 10 are inserted through the shaft 9 in the lower section 8.

普通のそろばんの玉は断面がほぼ菱形状であるが、本考案のそろばんの玉はほぼ楕円体状であり、これも本考案の特徴の一つである。ほぼ楕円体状であるから、その断面はほぼ楕円状を呈し、円弧状であってもよい。上下に隣接する玉相互間の座りを良くするために楕円体形状の上底部分と下底部分を切除するのが望ましい。
底板５に柔軟な弾性体11、例えばスポンジ、が設けてある。図２は玉10と弾性体11との関係を模式的に示す説明図であって、玉10の右半分の一部が所定深さｄだけ弾性体11の内部へ押し込まれている状態を示す。そうすると、玉１０と弾性体１１とが接触している面の間に摩擦力が発生しているから、そろばんを垂直の姿勢で使用する場合、接触面のうちのＳの部分に発生している摩擦力が玉10の重量を支持する結果、玉10は落下することなく原位置に保持される。玉10が弾性体11の内部に押し込まれる分量は、図２の如く曲線状部分の一部（深さｄ）の場合もあるし、曲線状部分の全部の場合もあり得る。このように、そろばんを垂直の姿勢で使用する場合に、何らかの付加的構造や付加的な手間を要せずして、玉10を任意の位置に保持することができる。 An ordinary abacus ball has a roughly diamond shape in cross section, but an abacus ball of the present invention has an almost ellipsoidal shape, which is one of the features of the present invention. Since it is substantially ellipsoidal, its cross section is substantially elliptical and may be arcuate. It is desirable to cut off the upper and lower base portions of the ellipsoidal shape in order to improve the sitting between the balls adjacent vertically.
The bottom plate 5 is provided with a flexible elastic body 11, for example, a sponge. FIG. 2 is an explanatory view schematically showing the relationship between the ball 10 and the elastic body 11, and shows a state in which a part of the right half of the ball 10 is pushed into the elastic body 11 by a predetermined depth d. . Then, since frictional force is generated between the surfaces where the ball 10 and the elastic body 11 are in contact, when the abacus is used in a vertical posture, it is generated in the portion S of the contact surface. As a result of the frictional force supporting the weight of the ball 10, the ball 10 is held in place without falling. The amount by which the ball 10 is pushed into the elastic body 11 may be a part of the curved part (depth d) as shown in FIG. 2 or the whole of the curved part. In this way, when the abacus is used in a vertical posture, the ball 10 can be held at an arbitrary position without requiring any additional structure or additional labor.

そろばんを通常の水平位置で使用する場合において、計算が進行してそれぞれの玉が所定の位置に置かれているときに、そろばん本体に不慮の外力が加わっても、そろばんの玉は弾性体11によって、常時所定位置に保持されているから、玉の位置が乱れることがない。この場合を規定したのが、請求項２である。 When the abacus is used in a normal horizontal position, the calculation is progressing and each ball is placed in the specified position. Therefore, the position of the ball is not disturbed. This case is defined by claim 2.

断面がほぼ菱形状である普通のそろばんの玉を用いた場合でも、底板５に柔軟な弾性体11を設けることにより請求項１及び請求項２と同様の効果が得られる。しかしながら、断面がほぼ菱形状である普通のそろばんの玉を用いた場合は、弾性体１１とそろばんの玉の間に発生している摩擦力を大きくする必要があり、ほぼ楕円体状そろばんの玉を用いた場合に比べて、そろばんの玉の動きはスムーズでなくなる。 Even when an ordinary abacus ball having a substantially rhombic cross section is used, the same effects as in the first and second aspects can be obtained by providing the flexible elastic body 11 on the bottom plate 5. However, when an ordinary abacus ball having a substantially rhombic cross section is used, it is necessary to increase the frictional force generated between the elastic body 11 and the abacus ball. The movement of the abacus ball is not as smooth as when using.

本考案のそろばんの実施例を示す正面図である。It is a front view which shows the Example of the abacus of this invention. 本考案のそろばんの一部切欠断面図である。It is a partially cutaway sectional view of the abacus of the present invention. 本考案の玉が菱形状の場合のそろばんの一部切欠断面図である。It is a partially cutaway sectional view of the abacus when the ball of the present invention has a rhombus shape.

Explanation of symbols

１そろばん本体
５底板
９軸
10 玉
11 弾性体
ｄ所定深さ 1 Abacus body 5 Bottom plate 9
10 balls
11 Elastic body d Predetermined depth

Claims

An elastic body (11) is provided in contact with the bottom plate (5) of the abacus main body (1), an approximately ellipsoidal ball (10) is inserted into the shaft (9), and a curved portion in the cross section of the ball (10) is provided. All or a part of the elastic body (11) is moved into the elastic body (11) by a predetermined depth (d), and a frictional force is generated between the contact surfaces of the ball (10) and the elastic body (11). An abacus characterized by preventing the ball (10) from falling.

An elastic body (11) is provided in contact with the bottom plate (5) of the abacus main body (1), a substantially ellipsoidal ball (10) is inserted into the shaft (9), and a curved portion in the cross section of the ball (10) is provided. All or a part of the elastic body (11) is moved into the elastic body (11) by a predetermined depth (d), and a frictional force is generated between the contact surfaces of the ball (10) and the elastic body (11). An abacus characterized by preventing the ball (10) from moving freely.

An elastic body (11) is provided in contact with the bottom plate (5) of the abacus body (1), a roughly diamond-shaped ball (10) is inserted into the shaft (9), and a part of the outer peripheral portion of the ball (10) in cross section Is moved into the elastic body (11) by a predetermined depth (d) and a ball (10) is generated by generating a frictional force between the contact surfaces of the ball (10) and the elastic body (11). 10) An abacus characterized by preventing falling.

An elastic body (11) is provided in contact with the bottom plate (5) of the abacus main body (1), a roughly diamond-shaped ball (10) is inserted into the shaft (9), and a part of the outer peripheral portion in the cross section of the ball (10) Is moved into the elastic body (11) by a predetermined depth (d) and a ball (10) is generated by generating a frictional force between the contact surfaces of the ball (10) and the elastic body (11). 10) An abacus characterized by preventing unintentional movement.