(19)
(11) EP 0 608 625 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.10.1994 Bulletin 1994/42

(43) Date of publication A2:
03.08.1994 Bulletin 1994/31

(21) Application number: 93310463.0

(22) Date of filing: 23.12.1993
(51) International Patent Classification (IPC)5: B24B 27/00, B24B 21/00, B24B 41/00
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 28.12.1992 JP 349109/92
28.12.1992 JP 89346/92
28.12.1992 JP 89347/92

(71) Applicant: RYOBI LTD.
Fuchu-shi, Hiroshima-ken (JP)

(72) Inventors:
  • Wada, Tatsuya, c/o Ryobi Limited
    Tokyo-to (JP)
  • Miyamoto, Kouichi, c/o Ryobi Limited
    Tokyo-to (JP)
  • Shiotani, Takeshi, c/o Ryobi Limited
    Tokyo-to (JP)
  • Takahashi, Shoji, c/o Ryobi Limited
    Tokyo-to (JP)
  • Sato, Mitsumasa, c/o Ryobi Limited
    Tokyo-to (JP)
  • Kouchiyama, Katsutoshi, c/o Ryobi Limited
    Tokyo-to (JP)
  • Omaha, Shinji, c/o Ryobi Limited
    Tokyo-to (JP)

(74) Representative: Fry, Alan Valentine et al
FRY HEATH & SPENCE The Old College 53 High Street
Horley Surrey RH6 7BN
Horley Surrey RH6 7BN (GB)


(56) References cited: : 
   
       


    (54) Grinding machine


    (57) A grinding machine in which both a belt sander and a spindle sander may be selectively used, a base is mounted on a holder member when the belt sander is used and the base is removed away from the holder member when the spindle sander is used. A fastening pin rotatably penetrates the base. An operational section is provided for rotating the fastening pin. An eccentric portion having a center at an eccentric position relative to a rotational center of the operational section and having a taper shape is formed in the fastening pin on a side of the holder member. A slanting hole into which the eccentric portion of the fastening pin may be inserted is formed in the holder member. An angle of the slanting hole is smaller than a taper angle of the eccentric portion of the fastening pin.






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