JPS5759789A - Printing hammer - Google Patents

Printing hammer

Info

Publication number
JPS5759789A
JPS5759789A JP13559180A JP13559180A JPS5759789A JP S5759789 A JPS5759789 A JP S5759789A JP 13559180 A JP13559180 A JP 13559180A JP 13559180 A JP13559180 A JP 13559180A JP S5759789 A JPS5759789 A JP S5759789A
Authority
JP
Japan
Prior art keywords
hammer
shaft
hole
maintenance
alloy material
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
JP13559180A
Other languages
Japanese (ja)
Inventor
Hiroshi Ito
Kazuhiro Aida
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13559180A priority Critical patent/JPS5759789A/en
Publication of JPS5759789A publication Critical patent/JPS5759789A/en
Pending legal-status Critical Current

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  • Impact Printers (AREA)

Abstract

PURPOSE: To facilitate the maintenance and replacement of a fulcrum shaft of a printer hammer when a backlash develops between a hammer hole and the shaft by making the shaft out of a sintered alloy material with a special shape.
CONSTITUTION: A hammer 2 is supported rotatively with a hammer shaft 3 inserted through a hole thereof (numeral 7 represents a return spring). A coil 5 is energized to attract the rear of the hammer 2 at the tip 4' of the core whereby the hammer 2 is turned counter clockwise on the shaft 3 to print. In an apparatus of such a type, a portion (indicated by θ) is made in a true circle at an angle of about 80° corresponding to contact surfaces 10 and 10' between the hammer shaft 3 and the hammer hole at the printing and other portions as planes 11 and 11' at about 100°. The hammer shaft 3 made of a sintered alloy material is used as obtained with dies 13 and 13' so arranged that joints 14 and 14' thereof correspond to said plane 11 and 11'. Therefore, wear due to use is only confined to the side of the hammer shaft 3. This allows the maintenance of the equipment simply by changing the shaft 3.
COPYRIGHT: (C)1982,JPO&Japio
JP13559180A 1980-09-29 1980-09-29 Printing hammer Pending JPS5759789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13559180A JPS5759789A (en) 1980-09-29 1980-09-29 Printing hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13559180A JPS5759789A (en) 1980-09-29 1980-09-29 Printing hammer

Publications (1)

Publication Number Publication Date
JPS5759789A true JPS5759789A (en) 1982-04-10

Family

ID=15155397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13559180A Pending JPS5759789A (en) 1980-09-29 1980-09-29 Printing hammer

Country Status (1)

Country Link
JP (1) JPS5759789A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6268683A (en) * 1985-09-21 1987-03-28 Caterpillar Mitsubishi Ltd Surface treating method for steel stock to be welded

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6268683A (en) * 1985-09-21 1987-03-28 Caterpillar Mitsubishi Ltd Surface treating method for steel stock to be welded
JPH0350638B2 (en) * 1985-09-21 1991-08-02 Shin Kyatapiraa Mitsubishi Kk

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