JPH01176012U

JPH01176012U -

Info

Publication number: JPH01176012U
Application number: JP6971588U
Authority: JP
Priority date: 1988-05-26
Filing date: 1988-05-26
Publication date: 1989-12-14

Description

[Brief explanation of the drawing]

図面は本考案の好適な実施例を示すものであつ
て、第１図は本実施例に係るナイフの全体を示す
正面図、第２図は本実施例に係るナイフにおける
刃子を拡大して示す要部正面図、第３図は第２図
の―線断面図、第４図は第２図の―線端
面図、第５図は本実施例に係るナイフを切断装置
に配設した状態を示す説明正面図、第６図は第５
図の側断面図、第７図ａ，ｂ，ｃ，ｄは本実施例
に係るナイフにより突き押し切断状態を段階的に
例示する説明図、第８図は筒状に成形したシート
状材の横断面を示す説明図、第９図および第１０
図は公知例に係るナイフを示す正面図および刃子
の拡大側断面図、第１１図および第１２図は別の
従来例に係るナイフを示す正面図および刃子の拡
大側断面図である。３２……本体、３６……刃部、４０……刃子、
４２……刃先、４４……切先、４６……刃元、４
７……表刃、４９……裏刃、Ｐ……刃子の間隔、
α……刃先角、θ_１……切込み角、θ_２……切込
み角。 The drawings show a preferred embodiment of the present invention; FIG. 1 is a front view showing the entire knife according to the present embodiment, and FIG. 2 is an enlarged view of the blade of the knife according to the present embodiment. 3 is a sectional view taken along the line ``-'' in FIG. 2, FIG. 4 is an end view taken along the ``-'' line in FIG. 2, and FIG. 5 is a state in which the knife according to this embodiment is installed in a cutting device. An explanatory front view showing the
7a, b, c, and d are explanatory diagrams illustrating step-by-step push and cut states of the knife according to the present embodiment, and FIG. 8 is a side sectional view of a sheet material formed into a cylindrical shape. Explanatory drawings showing cross sections, Figures 9 and 10
The figure is a front view and an enlarged side sectional view of a blade according to a known example, and FIGS. 11 and 12 are a front view and an enlarged side sectional view of a blade according to another conventional example. 32...Main body, 36...Blade portion, 40...Blade,
42...Blade tip, 44...Cut tip, 46...Blade base, 4
7...Front blade, 49...Back blade, P...Blade spacing,
α...Blade angle, _θ1 ...Entry angle, _θ2 ...Entry angle.

Claims

[Scope of Claim for Utility Model Registration] (1) A knife of the type that is installed in a cutting device of a packaging machine and operates with a small stroke to push and cut a sheet material formed into a cylindrical shape. A plurality of blades 40 having at least the same isosceles triangular shape are formed in the width direction of the lower edge of the blade portion 36 at equal intervals within a range of about 8 to 10 mm, and all the blades 40 have a front surface and a back surface. The necessary thin blades 47 and 49 are respectively formed with the same cutting angle, and the bases 46 and cutting edges 44 of all the blade edges 42 are respectively retracted from one end in the width direction of the blade portion 36 to the other end. The cutting edge angle α of the cutting edge 42 is set to about 40 to 45 degrees, and the cutting angle θ ₁ of the cutting edge 46 of the thin blades 47 and 49 is set to about 10 to 15 degrees. The cutting edge 44 of the thin-walled blades 47 and 49
A knife for cutting cylindrical materials in a packaging machine, characterized in that the cutting angle θ ₂ is set in a range of about 9 to 10 degrees. (2) A cylindrical material in a packaging machine according to claim 1, wherein the cutting angle θ ₃ of the cutting edge 42 of the thin blades 47 and 49 is set to be larger than 15 degrees at an intermediate portion between the cutting edge 46 and the cutting edge 44. cutting knife.