JP2019145257A5

JP2019145257A5 -

Info

Publication number: JP2019145257A5
Application number: JP2018026600A
Authority: JP
Filing date: 2018-02-19
Publication date: 2021-03-11
Anticipated expiration: 2038-02-19

Description

請求項１に示す本発明は、上下方向に立てた略円柱の上端部において、略円柱の中心線と、平面が４５°〜１５０°で折られた谷の線が、谷を下にした状態で該中心線と２０°〜７０°の角度で交わり、該折られた平面で、略円柱が切断されることにより、断面形状がハート形に形成されるものである。
略円柱とは、円柱だけでなく、水平横断面が円でかつ、円錐や逆円錐（尖ったところが下になる）や、縦断面が楕円や双曲線や放物線の一部となるところの楕円面や双曲面や放物面を持った鉛筆のキャップのような形も含む。
なお略円柱は、内部が詰まったもののことも、内部が空洞となっている円筒のことも言う。円筒は、シート状のものを巻いて円柱や円錐や逆円錐となるよう形成したものも含む。
また「上端部」は、逆さまにすれば下端部のことであるが、説明のために「上端部」とした。 According to the first aspect of the present invention, at the upper end of a substantially cylindrical cylinder standing vertically, the center line of the substantially cylindrical cylinder and the valley line whose plane is folded at 45 ° to 150 ° are in a state where the valley is downward. The cross-sectional shape is formed into a heart shape by intersecting the center line at an angle of 20 ° to 70 ° and cutting a substantially cylindrical cylinder on the folded plane.
A substantially cylinder is not only a cylinder, but also an elliptical surface whose horizontal cross section is a circle and a cone or inverted cone (pointed point is on the bottom), or whose vertical section is an ellipse, a hyperbola, or a part of a parabola. It also includes shapes like hyperboloids and pencil caps with paraboloids.
It should be noted that a substantially cylinder means a cylinder whose inside is clogged or a cylinder whose inside is hollow. The cylinder also includes a cylinder, a cone, or an inverted cone formed by winding a sheet-like material.
The "upper end" is the lower end when turned upside down, but for the sake of explanation, it is referred to as the "upper end".