JPS5455404A - Tension arm device - Google Patents

Tension arm device

Info

Publication number
JPS5455404A
JPS5455404A JP12278377A JP12278377A JPS5455404A JP S5455404 A JPS5455404 A JP S5455404A JP 12278377 A JP12278377 A JP 12278377A JP 12278377 A JP12278377 A JP 12278377A JP S5455404 A JPS5455404 A JP S5455404A
Authority
JP
Japan
Prior art keywords
arm
tension
auxiliary
tape
rotational angle
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
JP12278377A
Other languages
Japanese (ja)
Inventor
Kunio Noguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12278377A priority Critical patent/JPS5455404A/en
Publication of JPS5455404A publication Critical patent/JPS5455404A/en
Pending legal-status Critical Current

Links

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

PURPOSE: To make it possible to apply a tension arm device to a magnetic tape device having a short rising time by carrying a short auxiliary tension arm so that the vluctuations during the rise and break of the tape may be absorbed by an auxiliary tension arm having a small inertia.
CONSTITUTION: A main tension arm 12 is coupled to a bearing 22 and is supplied with a tension from a spring 21. A rotational angle detector 23 is attached to the shaft of the arm 12, and an auxiliary tension arm 11 having a roller 10 is attached rotatably to the leading end of the arm 12 by means of a pin 25. There are provided stoppers 15 and 15' for regulating the rotational angle of the arm 11 together with a film-shaped mask 18 for detecting the rotational angle such that they are made movable between a light source 16 and an optical detector 17 which are attached to the main arm. The auxiliary arm is supplied with a tension from a stationary arm 13 and a spring 14. When a tape running speed is accelerated, the fluctuation in the tape tension are decreased by the rotations about a pin 25 because the inertia of the auxiliary arm 11 is small
COPYRIGHT: (C)1979,JPO&Japio
JP12278377A 1977-10-12 1977-10-12 Tension arm device Pending JPS5455404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12278377A JPS5455404A (en) 1977-10-12 1977-10-12 Tension arm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12278377A JPS5455404A (en) 1977-10-12 1977-10-12 Tension arm device

Publications (1)

Publication Number Publication Date
JPS5455404A true JPS5455404A (en) 1979-05-02

Family

ID=14844490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12278377A Pending JPS5455404A (en) 1977-10-12 1977-10-12 Tension arm device

Country Status (1)

Country Link
JP (1) JPS5455404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615853U (en) * 1984-06-18 1986-01-14 東洋電機製造株式会社 Tarumi position display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615853U (en) * 1984-06-18 1986-01-14 東洋電機製造株式会社 Tarumi position display device

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