(19)
(11) EP 0 410 428 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.1991 Bulletin 1991/35

(43) Date of publication A2:
30.01.1991 Bulletin 1991/05

(21) Application number: 90114281.0

(22) Date of filing: 25.07.1990
(51) International Patent Classification (IPC)5: E21F 1/00
(84) Designated Contracting States:
CH DE FR GB IT LI

(30) Priority: 26.07.1989 JP 193523/89
24.08.1989 JP 217751/89
24.08.1989 JP 217753/89
24.08.1989 JP 217760/89

(60) Divisional application:
93112603.1 / 0577153
94106613.6 / 0613994
95107725.4 / 0675263

(71) Applicant: FUJI ELECTRIC CO., LTD.
Kawasaki-shi Kanagawa 210 (JP)

(72) Inventors:
  • Nakamura, Shogo, c/o Fuji Electric Co. Ltd.
    Kawasaki-shi, Kanagawa (JP)
  • Sasamoto, Toshiharu, c/o Fuji Electric Co. Ltd.
    Kawasaki-shi, Kanagawa (JP)
  • Minowa, Yoshihiro, c/o Fuji Electric Co. Ltd.
    Kawasaki-shi, Kanagawa (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Tunnel dust collecting system


    (57) Typically, in a tunnel dust collecting system comprising: a dust collecting chamber (2) formed in the upper space of a tunnel (1) with a ceiling board; electric dust collectors (3) arranged in the dust collecting chamber in such a manner that the dust collectors are shifted both longitudinally and laterally of the dust collecting chamber; and air blowers (4) provided in said dust collecting chamber at the air supplying end, the dust collectors except the first one closest to the air sucking end of the dust collecting chamber are set obliquely with respect to the longitudinal direction of the dust collecting chamber as if partially overlapped with one another when viewed from the air sucking end, whereby the contaminated air led in the dust collecting chamber is distributed uniformly to the dust collectors.






    Search report