JPS5796718A - Drum shear - Google Patents

Drum shear

Info

Publication number
JPS5796718A
JPS5796718A JP17184280A JP17184280A JPS5796718A JP S5796718 A JPS5796718 A JP S5796718A JP 17184280 A JP17184280 A JP 17184280A JP 17184280 A JP17184280 A JP 17184280A JP S5796718 A JPS5796718 A JP S5796718A
Authority
JP
Japan
Prior art keywords
sheet
drum
speed
lower edges
turns
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17184280A
Other languages
Japanese (ja)
Inventor
Masujiro Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP17184280A priority Critical patent/JPS5796718A/en
Publication of JPS5796718A publication Critical patent/JPS5796718A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To shear a sheet without causing the necessity for lowering running speed of the sheet , by accelerating tangential speed of upper and lower edges to the running speed of the sheet during a time of rotation of respective upper and lower drums by the ratio of their revolution becomes an integer.
CONSTITUTION: Numbers of teeth Z1, Z2 of a gear 10, driving a drum 2, and a gear 11, driving a lower drum 3, in a drum shear 1 are selectively formed mutually in a meshing state in such a manner that a sheet is never sheared by upper and lower edges 4 and 5 at their position of one turn of revolution before shearing opeation. If the output shaft of a driving gear 12 rotates n turns after cutting the sheet, the lower drum 3 rotates n turns while the upper drum 2 rotates n (Z2/Z1) turns. By the time the ratio of this n to n (Z2/Z1) becomes an integer, tangential speed of the upper and lower edges 4, 5 is increased to running speed of the sheet at its high speed running, when becoming an integer ratio, the upper and lower edges 4, 5 are again contacted to cut the sheet without lowering the running speed.
COPYRIGHT: (C)1982,JPO&Japio
JP17184280A 1980-12-04 1980-12-04 Drum shear Pending JPS5796718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17184280A JPS5796718A (en) 1980-12-04 1980-12-04 Drum shear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17184280A JPS5796718A (en) 1980-12-04 1980-12-04 Drum shear

Publications (1)

Publication Number Publication Date
JPS5796718A true JPS5796718A (en) 1982-06-16

Family

ID=15930768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17184280A Pending JPS5796718A (en) 1980-12-04 1980-12-04 Drum shear

Country Status (1)

Country Link
JP (1) JPS5796718A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267889A (en) * 1975-12-04 1977-06-04 Kawasaki Heavy Ind Ltd Shearing machine of rotary drum type for separation during travell
JPS5524832A (en) * 1978-08-07 1980-02-22 Hitachi Ltd Rotary type scanning shear

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267889A (en) * 1975-12-04 1977-06-04 Kawasaki Heavy Ind Ltd Shearing machine of rotary drum type for separation during travell
JPS5524832A (en) * 1978-08-07 1980-02-22 Hitachi Ltd Rotary type scanning shear

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