WO2013094277A1 - Pilot valve attachment structure of construction machine - Google Patents

Pilot valve attachment structure of construction machine Download PDF

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Publication number
WO2013094277A1
WO2013094277A1 PCT/JP2012/075514 JP2012075514W WO2013094277A1 WO 2013094277 A1 WO2013094277 A1 WO 2013094277A1 JP 2012075514 W JP2012075514 W JP 2012075514W WO 2013094277 A1 WO2013094277 A1 WO 2013094277A1
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WO
WIPO (PCT)
Prior art keywords
pilot valve
casing
construction machine
mat
floor plate
Prior art date
Application number
PCT/JP2012/075514
Other languages
French (fr)
Japanese (ja)
Inventor
田中　友幸
浩 多辺田
Original Assignee
日立建機株式会社
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 日立建機株式会社 filed Critical 日立建機株式会社
Priority to EP12860616.7A priority Critical patent/EP2796622A1/en
Priority to US14/360,950 priority patent/US20140306488A1/en
Priority to KR1020147018888A priority patent/KR20140113670A/en
Priority to CN201280062827.4A priority patent/CN104011299A/en
Publication of WO2013094277A1 publication Critical patent/WO2013094277A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E02F3/325—Backhoes of the miniature type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0875—Arrangement of valve arrangements on superstructures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers

Definitions

  • the present invention relates to a pilot valve mounting structure for a construction machine, which is provided in a construction machine such as a mini excavator and which is mounted on a floor plate with a pilot valve included in a traveling operation device disposed in front of a driver's seat.
  • Patent Document 1 There is one disclosed in Patent Document 1 as this type of prior art.
  • This prior art has a configuration in which a pilot valve included in a traveling operation device provided in a hydraulic excavator having a traveling body, a revolving body, and a working device is attached to a flat driver seat floor, that is, a floor plate. is there.
  • the above-described prior art has a configuration in which a pilot valve is attached to a flat floor plate, the height dimension of the portion of the pilot valve protruding upward from the floor plate is increased.
  • the operation space of the traveling operation device formed on the front side of the driver's seat tends to be narrowed, and it is easy to give a feeling of pressure to the operator sitting in the driver's seat.
  • This is particularly remarkable in a mini excavator or the like in which the construction machine provided with the pilot valve is a small machine and the manufacturing of the machine is easily restricted by the size of the operation space of the traveling operation device.
  • the present invention has been made from the above-described prior art, and an object thereof is to provide a construction machine pilot valve mounting structure capable of reducing the feeling of pressure on an operator sitting in a driver's seat.
  • the present invention includes a traveling body, a revolving body disposed on the traveling body, and a work device attached to the revolving body, and a floor formed on the revolving body.
  • a construction machine having a driver's seat on a plate and having a traveling operation device including a pilot valve at a position in front of the driver's seat is attached to the floor plate with the pilot valve included in the traveling operation device.
  • the floor plate is formed with a recess having a bottom hole into which a casing forming the outer shell of the pilot valve can be inserted, and the pilot valve is formed in the hole of the recess.
  • the casing of the pilot valve is attached to the bottom of the recess, and It is characterized by having a mat-like seal member for sealing a gap formed around the casing in the said hole parts were inserted to the casing of the pilot valve.
  • the pilot valve casing since the pilot valve casing is attached to the bottom of the concave portion of the floor plate, the pilot valve casing is arranged so that the upper surface of the pilot valve protruding from the upper surface of the floor plate is lowered. Can be attached to the floor plate.
  • the recess is formed in the floor plate in this way, there is a concern that contaminants such as mud and muddy water may enter the pilot valve through the recess.
  • the mat-like sealing member that seals the gaps formed around the perimeter can prevent contaminants such as mud and muddy water from entering the pilot valve.
  • the present invention is characterized in that, in the above-mentioned invention, the mat-like sealing member is made of a rubber member.
  • the present invention configured as described above can be easily attached to and detached from the concave portion of the floor plate by utilizing the elasticity of the mat-shaped seal member so as to bend the mat-shaped seal member.
  • the present invention is also characterized in that, in the above invention, the mat-like seal member is composed of a first divided member and a second divided member which are formed so as to be separated from each other and sandwich the casing of the pilot valve. Yes.
  • the mat-shaped seal member is divided into the first divided member and the second divided member and separated from each other, so that the work of arranging the mat-shaped seal member around the pilot valve is easy. Can be done.
  • the present invention is characterized in that, in the above invention, the mat-shaped sealing member has a protrusion at a lower portion and a hole into which the protrusion is fitted at the bottom of the recess.
  • the mat-shaped seal member can be easily positioned in the recess by fitting the protrusion of the mat-shaped seal member into the hole in the bottom of the recess of the floor plate.
  • the mat-like seal member attached to the concave portion of the plate can be kept stable without being displaced with respect to the concave portion.
  • the mat-shaped sealing member according to the above-described invention, the upper surface of the mat-shaped sealing member is substantially flush with the upper surface of the floor plate, and is higher than the upper surface of the floor plate. It is characterized by being attached to the recess.
  • the mat-like sealing member is attached to the recess so as to be substantially flush with the floor plate and higher than the upper surface of the floor plate. It is difficult to flow in, and it is possible to reliably prevent this contaminant from entering the pilot valve.
  • the portion of the pilot valve protruding from the floor plate can be made lower than before, and it is easy for the operator sitting in the driver's seat to receive it conventionally. It is possible to reduce a feeling of pressure generated in a limited operation space. As a result, more comfortable operability than conventional can be ensured. Further, the present invention can prevent intrusion of contaminants such as mud and muddy water into the pilot valve by the mat-like sealing member that seals the gap around the pilot valve, maintaining good performance of the pilot valve, In addition, ensuring of excellent durability can also be realized.
  • FIG. 3 is an enlarged perspective view of a main part of the state shown in FIG. It is the perspective view which looked at the location shown in FIG. 3 from another angle. It is a figure explaining the relationship between depression operation of an operation pedal, and the height of the casing of a pilot valve.
  • FIG. 1 It is a figure which shows the mat-shaped sealing member with which this embodiment is equipped, (a) A figure is the perspective view seen from the front side, (b) The figure is a perspective view seen from the back side. It is a figure which shows the mounting relationship of the mat-shaped sealing member and floor plate with which this embodiment is equipped, (a) A figure is a perspective view which shows the state before mounting
  • FIG. 10 is an enlarged cross-sectional view of FIG. 9A.
  • FIG. 10 is an enlarged view of a B cross section of FIG.
  • FIG. 11 is a cross-sectional side view of a main part in which the mat-like seal member according to the present embodiment is mounted in the state shown in FIG.
  • the construction machine provided with the pilot valve mounting structure according to the present invention is, for example, a mini excavator that constitutes a small machine and has a relatively narrow operation space of an operation device arranged in a driver's cab.
  • this mini excavator includes a traveling body 1, a revolving body 2 disposed on the traveling body 1, and a work device 3 that is attached to the revolving body 2 and is rotatable in the vertical direction. And have.
  • the work device 3 includes a boom 4 attached to the revolving structure 2, an arm 5 attached to the tip of the boom 4, and a bucket 6 attached to the tip of the arm 5.
  • a cab 7 and a counterweight 8 for ensuring a weight balance are arranged on the revolving structure 2.
  • a machine room 9 in which an engine, a hydraulic pump and the like are accommodated is disposed between the cab 7 and the counterweight 8.
  • a driver's seat 10 on which an operator is seated is disposed in the driver's cab 7, and a traveling operation lever 16, an operation pedal 17, and a pilot valve 18 are provided at a position in front of the driver's seat 10 as shown in FIG. 2.
  • a traveling operation device 11 is disposed.
  • Work operation devices 10 a and 10 b are arranged on both sides of the driver's seat 10.
  • a hole 20b into which a casing 18a that forms an outer shell of the pilot valve 18 can be inserted is formed in the floor plate 15 of the cab 7.
  • a recess 20 is formed in 20a.
  • the casing 18 a of the pilot valve 18 is attached to the bottom 20 a of the recess 20 with the casing 18 a of the pilot valve 18 inserted into the hole 20 b of the recess 20.
  • a mat-like sealing member 21 for sealing a gap generated around the casing 18a when the casing 18a of the pilot valve 18 is inserted into the hole 20b of the recess 20. It has.
  • the mat-like seal member 21 is made of, for example, a rubber member.
  • the mat-shaped sealing member 21 includes a first divided member 21a and a second divided member 21b which are formed so as to be separated from each other and sandwich the casing 18a of the pilot valve 18. It is made up.
  • the mat-shaped sealing member 21 has a protruding portion 22 in the lower portion, and a hole portion into which the protruding portion 22 is fitted into the bottom portion 20 a of the recessed portion 20. 23. Further, as shown in FIG. 5, the mat-shaped sealing member 21 is formed so that the upper surface thereof is substantially flush with the upper surface of the floor plate 15 and is higher than the upper surface of the floor plate 15. It is attached to the recess 20.
  • the height of the pilot valve 18 attached to the recess 20 of the floor plate 15 is such that the height position from the floor plate 15 to the upper surface of the casing 18a of the pilot valve 18 is on the driver's seat 10.
  • the shoe 30a of the operator's shoe 30 is set at a relatively low height position H within a range where the shoe 30a does not contact the floor plate 15. This height position H is, for example, around 20 mm.
  • the operator sitting in the driver's seat 10 operates the operation devices 10a and 10b for work shown in FIG.
  • the pilot valve 18 is activated and the travel direction control valve (not shown) is illustrated. Is switched, and the pressure oil from the hydraulic pump accommodated in the machine room 9 is supplied to the left and right traveling motors via the traveling direction control valve so that the traveling body 1 can travel.
  • the casing 18a of the pilot valve 18 is mounted on the bottom 20a of the recess 20 of the floor plate 15, the pilot protruding from the upper surface of the floor plate 15 is provided.
  • the casing 18a of the pilot valve 18 can be attached to the floor plate 15 so that the upper surface of the valve 18 is lowered. As a result, it is possible to reduce a feeling of pressure generated in a limited narrow operation space that is easily received by an operator sitting in the driver's seat 10 and to ensure comfortable operability.
  • the recess 20 is formed in the floor plate 15, dirt such as mud adhering to an operator's shoes or mud water generated when the mud is washed out enters the pilot valve 18 through the recess 20.
  • the mat-like seal member 21 that seals the gap formed around the casing 18a of the pilot valve 18 prevents the entry of contaminants such as mud and muddy water into the pilot valve 18. can do.
  • the mat-like seal member 21 is made of a rubber member, the mat-like seal member 21 is bent by using the elasticity of the mat-like seal member 21 so as to be recessed. 20 can be easily attached and detached.
  • the mat-like seal member 21 is divided into the first divided member 21a and the second divided member 21b and separated from each other, so that the mat-like seal member 21 is placed around the casing 18a of the pilot valve 18.
  • positioning work can be performed easily.
  • the mat-like seal member 21 can be easily positioned in the recess 20 by fitting the protrusion 22 of the mat-like seal member 21 into the hole 23 of the floor plate 15, and the floor plate The mat-like seal member 21 attached to the 15 recesses 20 can be kept stable without being displaced with respect to the recesses 20.
  • the mat-like sealing member 21 is formed in the recess 20 so that the upper surface thereof is substantially flush with the upper surface of the floor plate 15 and is higher than the upper surface of the floor plate 15. Since the attachment is made, contaminants such as mud and muddy water do not easily flow into the recess 20, and entry of the contaminants into the pilot valve 18 can be reliably prevented.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

Provided is a pilot valve attachment structure of a construction machine which can alleviate the sensation of pressure on an operator sitting in a driver seat. The present invention, which is provided to a mini shovel having a travel steering device (11) including a pilot valve (18), relates to a configuration in which the pilot valve (18) is attached to a floor plate (15), wherein formed in the floor plate (15) is a concavity (20) having a hole (20b) in a bottom part (20a) into which a casing (18a) forming the contours of the pilot valve (18) can be inserted, the casing (18a) of the pilot valve (18) can be attached to the bottom part (20a) of the concavity (20) when the casing (18a) of the pilot valve (18) has been inserted into the hole (20b) of the concavity (20), and a mat-shaped seal member (21) is provided for sealing a gap formed around the casing (18a) of the pilot valve (18) when the casing (18a) is inserted into the hole (20b) of the concavity (20).

Description

建設機械のパイロットバルブ取り付け構造Construction machine pilot valve mounting structure
　本発明は、ミニショベル等の建設機械に備えられ、運転席の前方位置に配置される走行用操作装置に含まれるパイロットバルブをフロアプレートに取り付けるようにした建設機械のパイロットバルブ取り付け構造に関する。 The present invention relates to a pilot valve mounting structure for a construction machine, which is provided in a construction machine such as a mini excavator and which is mounted on a floor plate with a pilot valve included in a traveling operation device disposed in front of a driver's seat.
　この種の従来技術として特許文献１に示されるものがある。この従来技術は、走行体、旋回体、作業装置を有する油圧ショベルに備えられる走行用操作装置に含まれるパイロットバルブを、平坦状に形成された運転席フロア、すなわちフロアプレートに取り付けた構成にしてある。 There is one disclosed in Patent Document 1 as this type of prior art. This prior art has a configuration in which a pilot valve included in a traveling operation device provided in a hydraulic excavator having a traveling body, a revolving body, and a working device is attached to a flat driver seat floor, that is, a floor plate. is there.
特開２０１１－６４０６４号公報JP 2011-64064 A
　上述した従来技術は、平坦状に形成されたフロアプレートにパイロットバルブを取り付けた構成にしてあることから、フロアプレートから上方に突出するパイロットバルブの部分の高さ寸法が高くなる。これにより運転席の前側に形成される走行用操作装置の操作空間が狭くなりがちで、運転席に座ったオペレータに対して圧迫感を与えやすい。このことは、当該パイロットバルブが備えられる建設機械が、小型機械であって機械の製作上、走行用操作装置の操作空間の大きさに制約を受けやすいミニショベル等においては特に顕著である。 Since the above-described prior art has a configuration in which a pilot valve is attached to a flat floor plate, the height dimension of the portion of the pilot valve protruding upward from the floor plate is increased. As a result, the operation space of the traveling operation device formed on the front side of the driver's seat tends to be narrowed, and it is easy to give a feeling of pressure to the operator sitting in the driver's seat. This is particularly remarkable in a mini excavator or the like in which the construction machine provided with the pilot valve is a small machine and the manufacturing of the machine is easily restricted by the size of the operation space of the traveling operation device.
　本発明は、上述した従来技術における実状からなされたもので、その目的は、運転席に座ったオペレータに対する圧迫感を軽減させることができる建設機械のパイロットバルブ取り付け構造を提供することにある。 The present invention has been made from the above-described prior art, and an object thereof is to provide a construction machine pilot valve mounting structure capable of reducing the feeling of pressure on an operator sitting in a driver's seat.
　この目的を達成するために、本発明は、走行体と、この走行体の上に配置される旋回体と、この旋回体に取り付けられる作業装置とを有し、上記旋回体に形成されるフロアプレート上に運転席を有し、上記運転席の前方位置にパイロットバルブを含む走行用操作装置を有する建設機械に備えられ、上記走行用操作装置に含まれるパイロットバルブを上記フロアプレートに取り付けるようにした建設機械のパイロットバルブ取り付け構造において、上記フロアプレートに、上記パイロットバルブの外殻を形成するケーシングの挿入が可能な穴を底部に有する凹部を形成し、上記凹部の上記穴に上記パイロットバルブの上記ケーシングを挿入させた状態で、上記凹部の底部に上記パイロットバルブの上記ケーシングを取り付けるとともに、上記凹部の上記穴に上記パイロットバルブの上記ケーシングを挿入させた際に上記ケーシングの周囲に生じる隙間をシールするマット状シール部材を備えたことを特徴としている。 In order to achieve this object, the present invention includes a traveling body, a revolving body disposed on the traveling body, and a work device attached to the revolving body, and a floor formed on the revolving body. A construction machine having a driver's seat on a plate and having a traveling operation device including a pilot valve at a position in front of the driver's seat is attached to the floor plate with the pilot valve included in the traveling operation device. In the pilot valve mounting structure for a construction machine, the floor plate is formed with a recess having a bottom hole into which a casing forming the outer shell of the pilot valve can be inserted, and the pilot valve is formed in the hole of the recess. With the casing inserted, the casing of the pilot valve is attached to the bottom of the recess, and It is characterized by having a mat-like seal member for sealing a gap formed around the casing in the said hole parts were inserted to the casing of the pilot valve.
　このように構成した本発明は、フロアプレートの凹部の底部にパイロットバルブのケーシングを取り付けるようにしたことから、フロアプレートの上面から突出するパイロットバルブの上面が低くなるように、パイロットバルブのケーシングをフロアプレートに取り付けることができる。また、このようにフロアプレートに凹部を形成したことにより、この凹部を介してパイロットバルブ内への泥土や泥水等の汚染物の侵入が懸念されるが、この点については、パイロットバルブのケーシングの周囲に生じる隙間をシールするマット状シール部材によって、泥土や泥水等の汚染物のパイロットバルブ内への侵入を阻止することができる。 In the present invention configured as described above, since the pilot valve casing is attached to the bottom of the concave portion of the floor plate, the pilot valve casing is arranged so that the upper surface of the pilot valve protruding from the upper surface of the floor plate is lowered. Can be attached to the floor plate. In addition, since the recess is formed in the floor plate in this way, there is a concern that contaminants such as mud and muddy water may enter the pilot valve through the recess. The mat-like sealing member that seals the gaps formed around the perimeter can prevent contaminants such as mud and muddy water from entering the pilot valve.
　また本発明は、上記発明において、上記マット状シール部材は、ゴム製の部材から成ることを特徴としている。このように構成した本発明は、マット状シール部材の弾性を利用して、このマット状シール部材を撓ませるようにしてフロアプレートの凹部に容易に着脱させることができる。 Further, the present invention is characterized in that, in the above-mentioned invention, the mat-like sealing member is made of a rubber member. The present invention configured as described above can be easily attached to and detached from the concave portion of the floor plate by utilizing the elasticity of the mat-shaped seal member so as to bend the mat-shaped seal member.
　また本発明は、上記発明において、上記マット状シール部材は、互いに分割形成されて上記パイロットバルブの上記ケーシングを挟むように配置される第１分割部材と第２分割部材とから成ることを特徴としている。このように構成した本発明は、マット状シール部材が第１分割部材と第２分割部材に分割形成され、互いに分離されているので、マット状シール部材をパイロットバルブの周囲に配置させる作業を容易に行うことができる。 The present invention is also characterized in that, in the above invention, the mat-like seal member is composed of a first divided member and a second divided member which are formed so as to be separated from each other and sandwich the casing of the pilot valve. Yes. In the present invention configured as described above, the mat-shaped seal member is divided into the first divided member and the second divided member and separated from each other, so that the work of arranging the mat-shaped seal member around the pilot valve is easy. Can be done.
　また本発明は、上記発明において、上記マット状シール部材の下側部分に突起部を有し、上記凹部の上記底部に上記突起部が嵌入される穴部を有することを特徴としている。このように構成した本発明は、マット状シール部材の突起部をフロアプレートの凹部の底部の穴部に嵌入させることにより、マット状シール部材を凹部内に容易に位置決めさせることができ、またフロアプレートの凹部に装着させたマット状シール部材を凹部に対して位置ずれすることなく安定に保つことができる。 Also, the present invention is characterized in that, in the above invention, the mat-shaped sealing member has a protrusion at a lower portion and a hole into which the protrusion is fitted at the bottom of the recess. In the present invention configured as described above, the mat-shaped seal member can be easily positioned in the recess by fitting the protrusion of the mat-shaped seal member into the hole in the bottom of the recess of the floor plate. The mat-like seal member attached to the concave portion of the plate can be kept stable without being displaced with respect to the concave portion.
　また本発明は、上記発明において、上記マット状シール部材を、その上面が、上記フロアプレートの上面と略同一面を形成するように、且つ、上記フロアプレートの上面以上の高さとなるように、上記凹部に取り付けたことを特徴としている。このように構成した本発明は、マット状シール部材をフロアプレートと略同一面に、且つフロアプレートの上面以上の高さとなるように凹部に取り付けることから、泥土や泥水等の汚染物が凹部へ流れ込み難く、この汚染物のパイロットバルブ内への侵入を確実に阻止できる。 Further, in the present invention, the mat-shaped sealing member according to the above-described invention, the upper surface of the mat-shaped sealing member is substantially flush with the upper surface of the floor plate, and is higher than the upper surface of the floor plate. It is characterized by being attached to the recess. In the present invention configured as described above, the mat-like sealing member is attached to the recess so as to be substantially flush with the floor plate and higher than the upper surface of the floor plate. It is difficult to flow in, and it is possible to reliably prevent this contaminant from entering the pilot valve.
　本発明は、フロアプレートに形成した凹部にパイロットバルブを取り付けるようにしたことから、フロアプレートから突出するパイロットバルブの部分を従来よりも低くすることができ、運転席に座ったオペレータが従来受けやすかった限られた操作空間内において生じる圧迫感を軽減させることができる。これにより従来よりも快適な操作性を確保できる。また本発明は、パイロットバルブの周囲の隙間をシールするマット状シール部材によって、泥土や泥水等の汚染物のパイロットバルブ内への侵入を阻止することができ、パイロットバルブの良好な性能の維持、及び優れた耐久性の確保も併せて実現させることができる。 In the present invention, since the pilot valve is attached to the recess formed in the floor plate, the portion of the pilot valve protruding from the floor plate can be made lower than before, and it is easy for the operator sitting in the driver's seat to receive it conventionally. It is possible to reduce a feeling of pressure generated in a limited operation space. As a result, more comfortable operability than conventional can be ensured. Further, the present invention can prevent intrusion of contaminants such as mud and muddy water into the pilot valve by the mat-like sealing member that seals the gap around the pilot valve, maintaining good performance of the pilot valve, In addition, ensuring of excellent durability can also be realized.
本発明に係るパイロットバルブ取り付け構造の一実施形態が備えられる建設機械の一例として挙げたミニショベルを示す側面図である。It is a side view which shows the mini excavator mentioned as an example of the construction machine with which one Embodiment of the pilot valve attachment structure which concerns on this invention is provided. 図１に示すミニショベルに備えられる運転席の配設部分を示す斜視図である。It is a perspective view which shows the arrangement | positioning part of the driver's seat with which the mini excavator shown in FIG. 1 is equipped. 図２に示す状態から操作ペダル等を除いた要部拡大斜視図である。FIG. 3 is an enlarged perspective view of a main part of the state shown in FIG. 図３に示す箇所を別の角度から見た斜視図である。It is the perspective view which looked at the location shown in FIG. 3 from another angle. 操作ペダルの踏み込み操作とパイロットバルブのケーシングの高さとの関係を説明する図である。It is a figure explaining the relationship between depression operation of an operation pedal, and the height of the casing of a pilot valve. 本実施形態に備えられるマット状シール部材を示す図で、（ａ）図は表側から見た斜視図、（ｂ）図は裏側から見た斜視図である。It is a figure which shows the mat-shaped sealing member with which this embodiment is equipped, (a) A figure is the perspective view seen from the front side, (b) The figure is a perspective view seen from the back side. 本実施形態に備えられるマット状シール部材とフロアプレートとの装着関係を示す図で、（ａ）図はマット状シール部材をフロアプレートに装着する前の状態を示す斜視図、（ｂ）図はマット状シール部材をフロアプレートに装着したときの状態を示す斜視図である。It is a figure which shows the mounting relationship of the mat-shaped sealing member and floor plate with which this embodiment is equipped, (a) A figure is a perspective view which shows the state before mounting | wearing a mat-shaped sealing member to a floor plate, (b) The figure is It is a perspective view which shows a state when a mat-shaped sealing member is mounted on the floor plate. 図４に示す状態からマット状シール部材を除いた状態を示す斜視図である。It is a perspective view which shows the state which remove | excluded the mat-shaped sealing member from the state shown in FIG. 本実施形態に備えられるマット状シール部材を除いたフロアプレートの部分を示す平面図である。It is a top view which shows the part of the floor plate except the mat-shaped sealing member with which this embodiment is equipped. 図９のＡ断面拡大図である。FIG. 10 is an enlarged cross-sectional view of FIG. 9A. 図９のＢ断面拡大図である。FIG. 10 is an enlarged view of a B cross section of FIG. 図１０に示す状態において本実施形態に係るマット状シール部材を装着させた要部側断面図である。FIG. 11 is a cross-sectional side view of a main part in which the mat-like seal member according to the present embodiment is mounted in the state shown in FIG.
　以下、本発明に係る建設機械のパイロットバルブ取り付け構造の実施の形態を図に基づいて説明する。 Hereinafter, an embodiment of a pilot valve mounting structure for a construction machine according to the present invention will be described with reference to the drawings.
　本発明に係るパイロットバルブ取り付け構造が備えられる建設機械は、例えば小型機械を構成し、運転室内に配置される操作装置の操作空間が比較的狭いミニショベルである。このミニショベルは、図１に示すように、走行体１と、この走行体１の上に配置される旋回体２と、この旋回体２に取り付けられ、上下方向に回動可能な作業装置３とを有している。作業装置３は、旋回体２に取り付けられるブーム４と、このブーム４の先端に取り付けられるアーム５と、このアーム５の先端に取り付けられるバケット６とを含んでいる。旋回体２には運転室７と、重量バランスを確保するカウンタウエイト８とが配置されている。また、運転室７とカウンタウエイト８との間には、エンジン、油圧ポンプ等が収容される機械室９が配置されている。運転室７内には、オペレータが着座する運転席１０が配置され、この運転席１０の前方位置に、図２に示すように、走行用の操作レバー１６、操作ペダル１７、及びパイロットバルブ１８を含む走行用操作装置１１が配置されている。運転席１０の両側には作業用操作装置１０ａ，１０ｂが配置されている。 The construction machine provided with the pilot valve mounting structure according to the present invention is, for example, a mini excavator that constitutes a small machine and has a relatively narrow operation space of an operation device arranged in a driver's cab. As shown in FIG. 1, this mini excavator includes a traveling body 1, a revolving body 2 disposed on the traveling body 1, and a work device 3 that is attached to the revolving body 2 and is rotatable in the vertical direction. And have. The work device 3 includes a boom 4 attached to the revolving structure 2, an arm 5 attached to the tip of the boom 4, and a bucket 6 attached to the tip of the arm 5. A cab 7 and a counterweight 8 for ensuring a weight balance are arranged on the revolving structure 2. A machine room 9 in which an engine, a hydraulic pump and the like are accommodated is disposed between the cab 7 and the counterweight 8. A driver's seat 10 on which an operator is seated is disposed in the driver's cab 7, and a traveling operation lever 16, an operation pedal 17, and a pilot valve 18 are provided at a position in front of the driver's seat 10 as shown in FIG. 2. A traveling operation device 11 is disposed. Work operation devices 10 a and 10 b are arranged on both sides of the driver's seat 10.
　本実施形態に係るパイロットバルブ取り付け構造は、図７～１１等に示すように、運転室７のフロアプレート１５に、パイロットバルブ１８の外殻を形成するケーシング１８ａの挿入が可能な穴２０ｂを底部２０ａに有する凹部２０を形成してある。図１０，１１に示すように、この凹部２０の穴２０ｂにパイロットバルブ１８のケーシング１８ａを挿入させた状態で、凹部２０の底部２０ａにパイロットバルブ１８のケーシング１８ａを取り付けてある。 In the pilot valve mounting structure according to the present embodiment, as shown in FIGS. 7 to 11 and the like, a hole 20b into which a casing 18a that forms an outer shell of the pilot valve 18 can be inserted is formed in the floor plate 15 of the cab 7. A recess 20 is formed in 20a. As shown in FIGS. 10 and 11, the casing 18 a of the pilot valve 18 is attached to the bottom 20 a of the recess 20 with the casing 18 a of the pilot valve 18 inserted into the hole 20 b of the recess 20.
　また本実施形態は、図３～５，１２に示すように、凹部２０の穴２０ｂにパイロットバルブ１８のケーシング１８ａを挿入させた際にケーシング１８ａの周囲に生じる隙間をシールするマット状シール部材２１を備えている。このマット状シール部材２１は、例えばゴム製の部材から成っている。また、このマット状シール部材２１は、図４，６に示すように、互いに分割形成されてパイロットバルブ１８のケーシング１８ａを挟むように配置される第１分割部材２１ａと第２分割部材２１ｂとから成っている。 Further, in the present embodiment, as shown in FIGS. 3 to 5, a mat-like sealing member 21 for sealing a gap generated around the casing 18a when the casing 18a of the pilot valve 18 is inserted into the hole 20b of the recess 20. It has. The mat-like seal member 21 is made of, for example, a rubber member. As shown in FIGS. 4 and 6, the mat-shaped sealing member 21 includes a first divided member 21a and a second divided member 21b which are formed so as to be separated from each other and sandwich the casing 18a of the pilot valve 18. It is made up.
　このマット状シール部材２１は、図６の（ｂ）図、及び図７に示すように、下側部分に突起部２２を有し、凹部２０の底部２０ａに突起部２２が嵌入される穴部２３を有している。また、図５に示すように、マット状シール部材２１を、その上面が、フロアプレート１５の上面と略同一面を形成するように、且つ、フロアプレート１５の上面以上の高さとなるように、凹部２０に取り付けてある。 As shown in FIG. 6B and FIG. 7, the mat-shaped sealing member 21 has a protruding portion 22 in the lower portion, and a hole portion into which the protruding portion 22 is fitted into the bottom portion 20 a of the recessed portion 20. 23. Further, as shown in FIG. 5, the mat-shaped sealing member 21 is formed so that the upper surface thereof is substantially flush with the upper surface of the floor plate 15 and is higher than the upper surface of the floor plate 15. It is attached to the recess 20.
　なお、フロアプレート１５の凹部２０に取り付けられるパイロットバルブ１８の取り付け高さは、図５に示すように、フロアプレート１５からパイロットバルブ１８のケーシング１８ａの上面までの高さ位置が、運転席１０に座ったオペレータが操作ペダル１７を踏み込んだ際に、オペレータの靴３０の踵３０ａがフロアプレート１５に接触しない範囲内における比較的低い高さ位置Ｈに設定してある。この高さ位置Ｈは、例えば２０ｍｍ前後としてある。 As shown in FIG. 5, the height of the pilot valve 18 attached to the recess 20 of the floor plate 15 is such that the height position from the floor plate 15 to the upper surface of the casing 18a of the pilot valve 18 is on the driver's seat 10. When the operator who has sat down steps on the operation pedal 17, the shoe 30a of the operator's shoe 30 is set at a relatively low height position H within a range where the shoe 30a does not contact the floor plate 15. This height position H is, for example, around 20 mm.
　本実施形態に係るパイロットバルブ取り付け構造が備えられるミニショベルにあっては、運転席１０に座ったオペレータが図２に示作業用操作装置１０ａ，１０ｂを操作することにより、旋回体２を旋回させ、あるいは作業装置３を上下方向に回動させて、バケット６を介して土砂の掘削作業等を行うことができる。また、運転席１０に座ったオペレータが、走行用操作装置１１の操作レバー１６を操作することにより、あるいは操作ペダル１７を靴で踏み込むことによりパイロットバルブ１８が作動して図示しない走行用方向制御弁が切り換えられ、機械室９に収容された油圧ポンプからの圧油が走行用方向制御弁を介して左右走行モータに供給されて走行体１を走行させることができる。 In the mini excavator provided with the pilot valve mounting structure according to the present embodiment, the operator sitting in the driver's seat 10 operates the operation devices 10a and 10b for work shown in FIG. Alternatively, it is possible to perform excavation work of earth and sand through the bucket 6 by rotating the working device 3 in the vertical direction. Further, when an operator sitting in the driver's seat 10 operates the operation lever 16 of the travel operation device 11 or depresses the operation pedal 17 with shoes, the pilot valve 18 is activated and the travel direction control valve (not shown) is illustrated. Is switched, and the pressure oil from the hydraulic pump accommodated in the machine room 9 is supplied to the left and right traveling motors via the traveling direction control valve so that the traveling body 1 can travel.
　上述のように構成した本実施形態に係るパイロットバルブ取り付け構造は、フロアプレート１５の凹部２０の底部２０ａにパイロットバルブ１８のケーシング１８ａを取り付けるようにしたことから、フロアプレート１５の上面から突出するパイロットバルブ１８の上面が低くなるように、パイロットバルブ１８のケーシング１８ａをフロアプレート１５に取り付けることができる。これにより運転席１０に座ったオペレータが受けやすい限られた狭い操作空間内において生じる圧迫感を軽減させることができ、快適な操作性を確保できる。 In the pilot valve mounting structure according to this embodiment configured as described above, since the casing 18a of the pilot valve 18 is mounted on the bottom 20a of the recess 20 of the floor plate 15, the pilot protruding from the upper surface of the floor plate 15 is provided. The casing 18a of the pilot valve 18 can be attached to the floor plate 15 so that the upper surface of the valve 18 is lowered. As a result, it is possible to reduce a feeling of pressure generated in a limited narrow operation space that is easily received by an operator sitting in the driver's seat 10 and to ensure comfortable operability.
　また、フロアプレート１５に凹部２０を形成したことにより、この凹部２０を介してパイロツトバルブ１８内へ例えばオペレータの靴に付着した泥土や、泥土を洗い流した際に生じる泥水等の汚染物が浸入することが懸念されるが、この点については、パイロットバルブ１８のケーシング１８ａの周囲に生じる隙間をシールするマット状シール部材２１によって、泥土や泥水等の汚染物のパイロットバルブ１８内への侵入を阻止することができる。 Further, since the recess 20 is formed in the floor plate 15, dirt such as mud adhering to an operator's shoes or mud water generated when the mud is washed out enters the pilot valve 18 through the recess 20. However, in this regard, the mat-like seal member 21 that seals the gap formed around the casing 18a of the pilot valve 18 prevents the entry of contaminants such as mud and muddy water into the pilot valve 18. can do.
　また本実施形態は、マット状シール部材２１がゴム製の部材から成るので、このマット状シール部材２１の弾性を利用して、このマット状シール部材２１を撓ませるようにしてフロアプレート１５の凹部２０に容易に着脱させることができる。 Further, in this embodiment, since the mat-like seal member 21 is made of a rubber member, the mat-like seal member 21 is bent by using the elasticity of the mat-like seal member 21 so as to be recessed. 20 can be easily attached and detached.
　また本実施形態は、マット状シール部材２１が第１分割部材２１ａと第２分割部材２１ｂに分割形成され、互いに分離されているので、マット状シール部材２１をパイロットバルブ１８のケーシング１８ａの周囲に配置させる作業を容易に行うことができる。 Further, in the present embodiment, the mat-like seal member 21 is divided into the first divided member 21a and the second divided member 21b and separated from each other, so that the mat-like seal member 21 is placed around the casing 18a of the pilot valve 18. The arrangement | positioning work can be performed easily.
　また本実施形態は、マット状シール部材２１の突起部２２をフロアプレート１５の穴部２３に嵌入させることにより、マット状シール部材２１を凹部２０内において容易に位置決めすることができ、またフロアプレート１５の凹部２０に装着させたマット状シール部材２１を凹部２０に対して位置ずれすることなく安定に保つことができる。 Further, according to the present embodiment, the mat-like seal member 21 can be easily positioned in the recess 20 by fitting the protrusion 22 of the mat-like seal member 21 into the hole 23 of the floor plate 15, and the floor plate The mat-like seal member 21 attached to the 15 recesses 20 can be kept stable without being displaced with respect to the recesses 20.
　また本実施形態は、マット状シール部材２１を、その上面が、フロアプレート１５の上面と略同一面を形成するように、且つ、フロアプレート１５の上面以上の高さとなるように、凹部２０に取り付けるようにしてあることから、泥土や泥水等の汚染物が凹部２０に流れ込み難く、この汚染物のパイロットバルブ１８内への侵入を確実に阻止することができる。 In the present embodiment, the mat-like sealing member 21 is formed in the recess 20 so that the upper surface thereof is substantially flush with the upper surface of the floor plate 15 and is higher than the upper surface of the floor plate 15. Since the attachment is made, contaminants such as mud and muddy water do not easily flow into the recess 20, and entry of the contaminants into the pilot valve 18 can be reliably prevented.
　１　　走行体
　２　　旋回体
　３　　作業装置
　１０　　運転席
　１１　　走行用操作装置
　１５　　フロアプレート
　１８　　パイロットバルブ
　１８ａ　ケーシング
　２０　　凹部
　２０ａ　底部
　２０ｂ　穴
　２１　　マット状シール部材
　２１ａ　第１分割部材
　２１ｂ　第２分割部材
　２１ｃ　穴
　２２　　突起部
　２３　　穴部 DESCRIPTION OF SYMBOLS 1 Traveling body 2 Revolving body 3 Work apparatus 10 Driver's seat 11 Traveling operation apparatus 15 Floor plate 18 Pilot valve 18a Casing 20 Recessed part 20a Bottom part 20b Hole 21 Mat-like sealing member 21a First divided member 21b Second divided member 21c Hole 22 Projection Part 23 Hole

Claims (5)

  1. 　走行体と、この走行体の上に配置される旋回体と、この旋回体に取り付けられる作業装置とを有し、上記旋回体に形成されるフロアプレート上に運転席を有し、上記運転席の前方位置にパイロットバルブを含む走行用操作装置を有する建設機械に備えられ、
    　上記走行用操作装置に含まれるパイロットバルブを上記フロアプレートに取り付けるようにした建設機械のパイロットバルブ取り付け構造において、
    　上記フロアプレートに、上記パイロットバルブの外殻を形成するケーシングの挿入が可能な穴を底部に有する凹部を形成し、
    　上記凹部の上記穴に上記パイロットバルブの上記ケーシングを挿入させた状態で、上記凹部の底部に上記パイロットバルブの上記ケーシングを取り付けるとともに、
    　上記凹部の上記穴に上記パイロットバルブの上記ケーシングを挿入させた際に上記ケーシングの周囲に生じる隙間をシールするマット状シール部材を備えたことを特徴とする建設機械のパイロットバルブ取り付け構造。     A traveling body, a revolving body disposed on the traveling body, and a working device attached to the revolving body, a driver seat on a floor plate formed on the revolving body, and the driver seat Provided in a construction machine having a traveling operation device including a pilot valve at a forward position of
    In the pilot valve mounting structure of a construction machine in which the pilot valve included in the traveling operation device is mounted on the floor plate,
    Formed in the floor plate is a recess having a hole in the bottom that allows insertion of a casing forming the outer shell of the pilot valve,
    With the casing of the pilot valve inserted into the hole of the recess, the casing of the pilot valve is attached to the bottom of the recess,
    A pilot valve mounting structure for a construction machine, comprising a mat-like seal member that seals a gap generated around the casing when the casing of the pilot valve is inserted into the hole of the recess.
  2. 　請求項１に記載の建設機械のパイロットバルブ取り付け構造において、
    　上記マット状シール部材は、ゴム製の部材から成ることを特徴とする建設機械のパイロットバルブ取り付け構造。     The pilot valve mounting structure for a construction machine according to claim 1,
    The construction valve mounting structure for a construction machine, wherein the mat-shaped sealing member is made of a rubber member.
  3. 　請求項２に記載の建設機械のパイロットバルブ取り付け構造において、
    　上記マット状シール部材は、互いに分割形成されて上記パイロットバルブの上記ケーシングを挟むように配置される第１分割部材と第２分割部材とから成ることを特徴とする建設機械のパイロットバルブ取り付け構造。     The pilot valve mounting structure for a construction machine according to claim 2,
    The pilot valve mounting structure for a construction machine, wherein the mat-shaped seal member includes a first divided member and a second divided member that are formed so as to be separated from each other and sandwich the casing of the pilot valve.
  4. 　請求項３に記載の建設機械のパイロットバルブ取り付け構造において、
    　上記マット状シール部材の下側部分に突起部を有し、上記凹部の上記底部に上記突起部が嵌入される穴部を有することを特徴とする建設機械のパイロットバルブ取り付け構造。     The pilot valve mounting structure for a construction machine according to claim 3,
    A pilot valve mounting structure for a construction machine, comprising: a protrusion on a lower portion of the mat-shaped seal member; and a hole into which the protrusion is inserted into the bottom of the recess.
  5. 　請求項４に記載の建設機械のパイロットバルブ取り付け構造において、
    　上記マット状シール部材を、その上面が、上記フロアプレートの上面と略同一面を形成するように、且つ、上記フロアプレートの上面以上の高さとなるように、上記凹部に取り付けたことを特徴とする建設機械のパイロットバルブ取り付け構造。     The construction machine pilot valve mounting structure according to claim 4,
    The mat-shaped sealing member is attached to the recess so that the upper surface thereof is substantially flush with the upper surface of the floor plate and is higher than the upper surface of the floor plate. Pilot valve mounting structure for construction machinery.
PCT/JP2012/075514 2011-12-21 2012-10-02 Pilot valve attachment structure of construction machine WO2013094277A1 (en)

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EP12860616.7A EP2796622A1 (en) 2011-12-21 2012-10-02 Pilot valve attachment structure of construction machine
US14/360,950 US20140306488A1 (en) 2011-12-21 2012-10-02 Pilot Valve Attachment Structure of Construction Machine
KR1020147018888A KR20140113670A (en) 2011-12-21 2012-10-02 Pilot valve attachment structure of construction machine
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