JPS57139769A - Tension wire type driving device - Google Patents

Tension wire type driving device

Info

Publication number
JPS57139769A
JPS57139769A JP2593781A JP2593781A JPS57139769A JP S57139769 A JPS57139769 A JP S57139769A JP 2593781 A JP2593781 A JP 2593781A JP 2593781 A JP2593781 A JP 2593781A JP S57139769 A JPS57139769 A JP S57139769A
Authority
JP
Japan
Prior art keywords
winding
pulley
angle alpha
lead angle
equal
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
JP2593781A
Other languages
Japanese (ja)
Inventor
Haruo Kadoi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2593781A priority Critical patent/JPS57139769A/en
Publication of JPS57139769A publication Critical patent/JPS57139769A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To ensure a smooth reciprocal motion for an object to be driven, by winding a going wire for the object to be driven to a half side of a common winding pulley drum and a return wire to the other half side respectively with the winding directions reverse to each other and with the winding lead angles equal to each other. CONSTITUTION:A screw lever 93 has a lead angle alpha equal to the wire winding lead angle alpha, and a pulley rotary center shaft 9 is supported by fitting a pulley 25 to the screw lever shaft 93. The spiral grooves 256 and 257 are formed to the left and right circumference drums 251 and 252 of the pulley 25 with same winding direction and the equal lead angle alpha, and the wires 21 and 22 are accepted and wound to these grooves respectively. Thus the right and left movements of the pulley 25 follow exactly the lead angle alpha to perfectly prevent a shift of the relative position between the drums 251 and 252 and the wires 21 and 22. For a guide pully, an inclination alpha is secured along with the sliding toward the axial direction.
JP2593781A 1981-02-24 1981-02-24 Tension wire type driving device Pending JPS57139769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2593781A JPS57139769A (en) 1981-02-24 1981-02-24 Tension wire type driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2593781A JPS57139769A (en) 1981-02-24 1981-02-24 Tension wire type driving device

Publications (1)

Publication Number Publication Date
JPS57139769A true JPS57139769A (en) 1982-08-28

Family

ID=12179676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2593781A Pending JPS57139769A (en) 1981-02-24 1981-02-24 Tension wire type driving device

Country Status (1)

Country Link
JP (1) JPS57139769A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635763U (en) * 1986-06-30 1988-01-14
US7172135B2 (en) 2002-09-05 2007-02-06 Nippon Thermostat Co., Ltd. Thermostat for two-system cooling device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635763U (en) * 1986-06-30 1988-01-14
JPH0516758Y2 (en) * 1986-06-30 1993-05-06
US7172135B2 (en) 2002-09-05 2007-02-06 Nippon Thermostat Co., Ltd. Thermostat for two-system cooling device

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