(19)
(11) EP 2 184 409 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.01.2014 Bulletin 2014/03

(43) Date of publication A2:
12.05.2010 Bulletin 2010/19

(21) Application number: 09174301.3

(22) Date of filing: 28.10.2009
(51) International Patent Classification (IPC): 
E02F 9/00(2006.01)
E02F 9/08(2006.01)
 E02F 3/32(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(30) Priority: 11.11.2008 JP 2008289132

(71) Applicant: Kobelco Construction Machinery Co., Ltd.
Hiroshima-shi, Hiroshima 731-0138 (JP)

(72) Inventors:
  • Maeba, Eiji
    Hiroshima-shi Hiroshima 731-0138 (JP)
  • Miyachi, Isao
    Hiroshima-shi Hiroshima 731-0138 (JP)
  • Ushiroguchi, Asuka
    Hiroshima-shi Hiroshima 731-0138 (JP)

(74) Representative: TBK 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Frame structure of construction machine


(57) A rotating frame (31) and a reinforcing rib (34) which stands upright on a bottom plate (32) of the rotating frame and extends in a front-rear direction are formed integrally with each other by casting. A tube insertion hole (34a) is formed in a base portion of the reinforcing rib (34) in a standing direction thereof such that the tube insertion hole (34a) extends through the base portion of the reinforcing rib in a thickness direction thereof. A communication hole (34b) which communicates with the tube insertion hole (34a) is formed in the bottom plate (32) of the rotating frame (31) such that the communication hole (34b) extends through the bottom plate of the rotating frame in a thickness direction thereof at a position corresponding to the tube insertion hole (34a).







Search report









Search report