Pilot Valve Attachment Structure of Construction Machine

Abstract

Provided is a pilot valve attachment structure of a construction machine which can reduce an oppressive sensation that an operator sitting on an operator's seat may feel. The present invention is provided in a compact excavator having a travel operation device 11 including a pilot valve 18, and configured such that the pilot valve 18 is attached to a floor plate 15, wherein a recessed part 20 having a hole 20 b, into which a casing 18 a forming an outer frame of the pilot valve 18 can be inserted, on a bottom part 20 a thereof is provided on the floor plate 15, the casing 18 a of the pilot valve 18 is attached to the bottom part 20 a of the recessed part 20 in a state where the casing 18 a of the pilot valve 18 is inserted into the hole 20 b of the recessed part 20, and a mat shaped seal member 21 for sealing a space that is formed around the casing 18 a of the pilot valve 18 when the casing 18 a is inserted into the hole 20 b of the recessed part 20.

1 . A pilot valve attachment structure of a construction machine that includes a travel base, an upperstructure arranged on the travel base, a working device attached to the upperstructure, an operator's seat arranged on a floor plate that is formed on the upperstructure, and a travel operation device arranged in front of the operator's seat and having a pilot valve, the pilot valve included in the travel operation device being attached to the floor plate, wherein
 a recessed part having a hole, into which a casing forming an outer frame of the pilot valve can be inserted, on a bottom part thereof is provided on the floor plate,   the casing of the pilot valve is attached to the bottom part of the recessed part in a state where the casing of the pilot valve is inserted into the hole of the recessed part, and   a mat shaped seal member for sealing a space that is formed around the casing of the pilot valve when the casing is inserted into the hole of the recessed part.   
     
     
         2 . The pilot valve attachment structure of a construction machine according to  claim 1 , wherein
 the mat shaped seal member is made of a rubber member.   
     
     
         3 . The pilot valve attachment structure of a construction machine according to  claim 2 , wherein
 the mat shaped seal member consists of a first divided member and a second divided member that are dividedly formed so as to interpose the casing of the pilot valve therebetween.   
     
     
         4 . The pilot valve attachment structure of a construction machine according to  claim 3 , wherein
 the mat shaped seal member includes a projection part on a lower side thereof, and   a hole part into which the projection part is inserted is formed on the bottom part of the recessed part.   
     
     
         5 . The pilot valve attachment structure of a construction machine according to  claim 4 , wherein
 the mat shaped seal member is attached to the recessed part so that a top surface of the mat shaped seal member forms approximately the same plane as a top surface of the floor plate and the top surface of mat shaped seal member becomes in the height equal to or higher than that of the floor plate.