JP2005023718A - Construction machinery - Google Patents

Construction machinery Download PDF

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Publication number
JP2005023718A
JP2005023718A JP2003270009A JP2003270009A JP2005023718A JP 2005023718 A JP2005023718 A JP 2005023718A JP 2003270009 A JP2003270009 A JP 2003270009A JP 2003270009 A JP2003270009 A JP 2003270009A JP 2005023718 A JP2005023718 A JP 2005023718A
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Prior art keywords
cab
frame
construction machine
driver
protection member
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JP2003270009A
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Japanese (ja)
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Sadashi Mori
貞志 森
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Komatsu Ltd
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Komatsu Ltd
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Priority to JP2003270009A priority Critical patent/JP2005023718A/en
Priority to US10/871,816 priority patent/US20050000121A1/en
Priority to CNA2004100593605A priority patent/CN1576470A/en
Priority to DE102004029960A priority patent/DE102004029960A1/en
Priority to GB0414374A priority patent/GB2404360A/en
Priority to KR1020040049961A priority patent/KR20050004032A/en
Publication of JP2005023718A publication Critical patent/JP2005023718A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]
    • 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
    • E02F9/24—Safety devices, e.g. for preventing overload

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide construction machinery capable of constituting a protection structure of a driver's cab when the construction machinery rolls over at a low manufacturing cost by improving visibility property, transportation property, and assembly and disassembly workability. <P>SOLUTION: A driver's cab protection member 11 substantially in parallel with an upper side 7a is arranged in close proximity to the upper side 7a on a rear face of the driver's cab 7. A portal frame 10A having at least two support columns 12A, 13A erected in the vertical direction in left and right parts of the driver's cab protection member 11 may be arranged in close proximity to the rear face of the driver's cab 7. A guard frame 20A which has the driver's cab protection member 11 in an upper part front end part and in which a lower part terminal part is attached to an upper part of a counterweight 6 may be arranged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、建設機械に関し、特には転倒時の運転室の保護構造を有する建設機械に関する。   The present invention relates to a construction machine, and more particularly, to a construction machine having a driver's cab protection structure during a fall.

従来より、建設機械において、同建設機械が横転（９０度程度回転することを言う）または転倒（１８０度程度以上回転することを言い、以下ロールオーバと言う。）した際に運転室の変形を防止または抑制してオペレータを保護する各種の手段が提案されている。このような手段の第１例として、特許文献１には、自走可能な車体の上部に設けた運転室の側面部に緩衝装置を取り付け、建設機械が横転した際に同緩衝装置によって運転室に作用する衝撃荷重を緩和する構造が記載されている。また第２例として、特許文献２には、建設機械の下部走行体上部に旋回自在に搭載された上部旋回体フレームの左右一側に運転室を搭載し、前記上部旋回体フレームの側面であって、運転室の側方に支持部材を設けし、該建設機械が前記運転室の側に横転したときに、運転室が接地しない状態で前記支持部材が下部走行体とともに該建設機械を支持する構造が記載されている。 Conventionally, in a construction machine, when the construction machine rolls over ( refers to rotation about 90 degrees) or falls (refers to rotation about 180 degrees or more, hereinafter referred to as rollover), the cab is deformed. Various means have been proposed to prevent or suppress and protect the operator. As a first example of such means, in Patent Document 1, a shock absorber is attached to a side surface of a driver's cab provided on an upper part of a self-propelled vehicle body, and when the construction machine rolls over, the driver's cab is used. A structure for mitigating the impact load acting on is described. As a second example, Patent Document 2 discloses that a driver's cab is mounted on the left and right sides of an upper swing body frame that is pivotably mounted on the upper traveling body of a construction machine. Then, a support member is provided on the side of the cab, and when the construction machine rolls over to the cab side, the support member supports the construction machine together with the lower traveling body in a state where the cab is not grounded. The structure is described.

これらの第１例及び第２例は、低コストで、且つ通常の建設機械に容易に適用し得る構造を有しているが、建設機械が横転に留まらずにロールオーバに至った場合の考慮はなされていない。   These first and second examples have a structure that is low in cost and can be easily applied to ordinary construction machines, but consideration is given when the construction machine reaches a rollover without staying rollover. Has not been made.

また第３例として、特許文献３には、運転室周囲を門型枠体で構成したキャブガードで囲って、建設機械がロールオーバした際に該キャブガードにより運転室を保護する構造が記載されている。図７はこの特許文献３に記載された建設機械の例としての油圧ショベルの側面図を、及び図８は同油圧ショベルの一部破断の要部斜視図をそれぞれ示しており、図７、図８により従来技術に係る運転室保護構造を有する建設機械の例を説明する。なお、以下では、左右と言うときは、車両前方を向いた状態での左右を指すものとする。   As a third example, Patent Document 3 describes a structure in which the cab is surrounded by a cab guard composed of a portal frame and the cab guard protects the cab when the construction machine rolls over. ing. FIG. 7 shows a side view of a hydraulic excavator as an example of the construction machine described in Patent Document 3, and FIG. 8 shows a perspective view of a principal part of the hydraulic excavator with a part broken away. 8 shows an example of a construction machine having a driver's cab protection structure according to the prior art. In the following, the term “left and right” refers to the left and right with the vehicle facing forward.

図７、図８において、油圧ショベル８０は、下部走行体８１上に上部旋回体フレーム８２が旋回自在に搭載され、該上部旋回体フレーム８２上の、前部の左右中央部には作業機のブーム８３が、後部にはカウンタウエイト８４が、前部左側には運転室８５が、それぞれ設けられている。また、運転室８５を取り囲んでキャブガード９０が設けられている。 7 and 8, an excavator 80 has an upper swing body frame 82 mounted on a lower traveling body 81 so as to be able to swing freely. boom 83, counterweight 84 in the rear is, the cab 85 at the front left, are provided. A cab guard 90 is provided so as to surround the cab 85.

特開平１１−６１８８５号公報（第２〜３頁、第４図）Japanese Patent Laid-Open No. 11-61885 (pages 2 and 3, FIG. 4) 特開２０００−２３０２５５号公報（第２〜３頁、第１図）Japanese Unexamined Patent Publication No. 2000-230255 (pages 2 and 3, FIG. 1) 特開２００１−１７３０１７号公報（第４〜５頁、第１図、第４図）JP 2001-173017 A (pages 4-5, FIGS. 1 and 4)

しかしながら、図７、図８に示すような従来技術に係る油圧ショベル８０の構成において、運転室８５を取り囲んでキャブガード９０を設けたことによって次の問題がある。
（１）油圧ショベル８０がロールオーバした際にキャブガード９０によって運転室８５の変形の防止または抑制を可能にするために、キャブガード９０を極めて強固な構造にする必要があり、また、キャブガード９０の構成部品点数が多い。このため、キャブガード９０は製造コストの極めて高いものとなる。また、運転室８５の重量の増加による車両全重量の増加につながり、車両の駆動性能の低下を招くという問題がある。
（２）さらに、キャブガード９０の太い支柱によって、運転室８５からの前方、上方及び後方の視界性が共に阻害されるという問題もある。 However, in the configuration of the hydraulic excavator 80 according to the prior art as shown in FIGS. 7 and 8, the following problem is caused by providing the cab guard 90 around the cab 85.
(1) In order to prevent or suppress the deformation of the cab 85 by the cab guard 90 when the excavator 80 rolls over, the cab guard 90 needs to have a very strong structure, and the cab guard There are many 90 component parts. For this reason, the cab guard 90 is extremely expensive to manufacture. In addition, there is a problem that the total weight of the vehicle is increased due to an increase in the weight of the cab 85 and the driving performance of the vehicle is reduced.
(2) Further, there is a problem that the forward visibility, the upward visibility, and the backward visibility from the cab 85 are obstructed by the thick support column of the cab guard 90.

（３）油圧ショベル８０を輸送車両に車載して移動する際に上記キャブガード９０が輸送時最大車幅の規制値を超える場合や、このキャブガード９０を油圧ショベル８０の稼動現場で取り付ける場合に、キャブガード９０を取外したり、又は取り付ける必要がある。しかしながら、従来のキャブガード９０は、上部旋回体フレーム８２への取付部が多い上に、車体内側の取付部スペースが狭いために、その取外しや取付作業も非常に煩雑である。その結果、従来のキャブガード９０を有する油圧ショベル８０の輸送性及び組立分解作業性を低下させている。 (3) When the cab guard 90 exceeds the regulation value for the maximum vehicle width during transportation when the hydraulic excavator 80 is mounted on a transport vehicle, or when the cab guard 90 is attached at the operation site of the hydraulic excavator 80. The cab guard 90 needs to be removed or attached. However, since the conventional cab guard 90 has many attachment parts to the upper revolving body frame 82 and the attachment part space inside the vehicle body is narrow, the removal and attachment work is very complicated. As a result, the transportability and assembly / disassembly workability of the hydraulic excavator 80 having the conventional cab guard 90 are lowered.

本発明は、上記の問題点に着目してなされたものであり、建設機械がロールオーバした際の運転室の保護構造を、安い製造コストで、視界性が良く、しかも輸送性及び組立分解作業性を良好にして構成できる建設機械を提供することを目的としている。   The present invention has been made paying attention to the above-mentioned problems, and has a structure for protecting a driver's cab when a construction machine rolls over at a low manufacturing cost, has good visibility, and is easy to transport and assemble and disassemble. An object of the present invention is to provide a construction machine that can be constructed with good characteristics.

上記の目的を達成するために、第１発明は、下部走行体上に上部旋回体フレームを旋回自在に搭載し、前記上部旋回体フレーム上に運転室と作業機とカウンタウエイトを設けた建設機械において、運転室保護部材と前記運転室保護部材を支持する支持部材と前記支持部材の基端部を車体に取り付ける取付部材とを含む運転室保護フレームが前記上部旋回体フレームに取り付けられ、前記運転室の後方に立てて設けられる構成としている。 In order to achieve the above object, a first invention is a construction machine in which an upper swing body frame is rotatably mounted on a lower traveling body , and a driver's cab , a work machine, and a counterweight are provided on the upper swing body frame. A cab protection frame including a cab protection member, a support member that supports the cab protection member, and an attachment member that attaches a base end portion of the support member to the vehicle body, is attached to the upper swing body frame, It is configured to stand up behind the chamber .

また第２発明は、第１発明による建設機械において、前記運転室保護部材と前記運転室保護部材を支持する支持部材と前記支持部材の基端部を車体に取り付ける前記取付部材とを含む運転室保護フレームを前記上部旋回体フレームの縦板部材に取り付ける構成としている。 A second aspect of the construction machine according to the first aspect of the invention includes the cab including the cab protection member, a support member that supports the cab protection member, and the mounting member that attaches a base end portion of the support member to a vehicle body. The protective frame is attached to the vertical plate member of the upper swing body frame .

また第３発明は、第１発明による建設機械において、前記運転室保護部材と前記運転室保護部材を支持する支持部材と前記支持部材の基端部を車体に取り付ける前記取付部材とを含む運転室保護フレームをカウンタウエイトの上部に取り付ける構成としている。 A third aspect of the construction machine according to the first aspect of the invention includes the cab including the cab protection member, a support member that supports the cab protection member, and the mounting member that attaches a base end portion of the support member to a vehicle body. The protective frame is attached to the upper part of the counterweight.

第１発明によると、次のような効果を奏する。
（１）建設機械が１８０度転倒した時に、同建設機械は作業機と運転室保護部材とで地面に当接するから、その両者の間に位置する運転室の変形が防止又は抑制される。従って、作業機及び運転室保護部材により、運転室内のオペレータ空間を確保できる。
（２）運転室保護部材を含む運転室保護フレームは、簡単な構造であり、運転室後部に垂直方向に立てて設けるだけであるから、小型から大型の建設機械にわたって容易にかつ安いコストで適用できる。また、運転室保護フレームの構成部品が少なく、取付箇所も少ないため、着脱作業が容易である。
（３）また上記（２）と同じ理由によって、建設機械の外形寸法を増大させずに運転室保護部材を設けることができるので、建設機械の輸送性を低下させることがない。
（４）さらに、運転室保護部材を含む運転室保護フレームは運転室の後部のみに設けているので、運転室からの前方、側方及び上方の視界性を向上できる。 According to the first invention, the following effects can be obtained.
(1) When the construction machine falls 180 degrees , the construction machine comes into contact with the ground with the work machine and the cab protection member, so that deformation of the cab located between them is prevented or suppressed. Therefore, the operator space in the cab can be secured by the work implement and the cab protection member.
(2) The cab protection frame including the cab protection member has a simple structure and is simply provided in the vertical direction at the rear of the cab, so it can be easily and inexpensively applied to small to large construction machines. it can. Moreover, since there are few components of a cab protection frame and there are few attachment places, attachment / detachment work is easy.
(3) Further, for the same reason as the above (2), since the cab protection member can be provided without increasing the external dimensions of the construction machine, the transportability of the construction machine is not lowered.
(4) Furthermore, since the cab protection frame including the cab protection member is provided only in the rear part of the cab, the front, side, and upper visibility from the cab can be improved.

第２発明によると、第１発明による効果に加えて、次の効果が得られる。
運転室保護フレームを車体フレーム（油圧ショベルの上部旋回体フレーム）の縦板部材に取り付けるので、建設機械上方から着脱作業がやり易い。これによって、運転室保護フレームの組立分解作業性及び着脱性を向上できる。 According to the second invention, in addition to the effects of the first invention, the following effects can be obtained.
Since the cab protection frame is attached to the vertical plate member of the vehicle body frame (the upper swing body frame of the hydraulic excavator), it is easy to attach and detach from the construction machine. Thereby, assembly / disassembly workability and detachability of the cab protection frame can be improved.

第３発明によると、第１発明による効果に加えて、さらに次の効果を奏する。
例えば，後端部の旋回半径が車幅内に略収まるようにした後方小旋回型油圧ショベルの如く、上部旋回体フレーム上の面積が狭いことによって同上部旋回体フレーム上に前記運転室保護フレームの取付が困難な場合でも、カウンタウエイトを取付部にして運転室保護部材を設けることができる。これにより、後方小旋回型油圧ショベルの場合でも、組立分解作業性及び輸送性を損なうことがない。このため、小型の建設機械においても、容易に且つ安いコストで強固な運転室保護フレームを設けることができる。 According to the third invention, in addition to the effect of the first invention, the following effect is further obtained.
For example, as the turning radius of the rear end portion of the rear small swing radius type hydraulic excavator to substantially fit within the vehicle width, the cab protection frame in the upper rotating body on the frame by a narrow area on the upper swing body frame even if the attachment is difficult, it is possible to a counterweight mounting portion provided cab protection member. As a result, even in the case of a small rear swivel excavator, assembly / disassembly workability and transportability are not impaired. For this reason, even in a small construction machine, a strong cab protection frame can be provided easily and at a low cost.

以上の結果、建設機械が転倒した際の運転室変形の抑制を、安い製造コストと、良好な組立分解作業性と、良好な輸送性及び視界性とを伴って実現できる建設機械を提供することができる。 As a result of the above, to provide a construction machine that can realize the suppression of cab deformation when the construction machine falls down with low manufacturing cost, good assembly and disassembly workability, and good transportability and visibility. Can do.

以下に油圧ショベルを例にして、本発明に係る実施形態について、図１〜図６を参照して詳述する。   An embodiment according to the present invention will be described below in detail with reference to FIGS.

先ず図１〜図２により、第１実施形態の説明をする。図１は本発明の実施形態に係る建設機械の斜視図、図２は第１実施形態に係る建設機械の要部斜視図である。   First, the first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of a construction machine according to an embodiment of the present invention, and FIG. 2 is a perspective view of a main part of the construction machine according to the first embodiment.

図１において、油圧ショベル１は、下部走行体３上に上部旋回体フレーム４を旋回自在に搭載し、同上部旋回体フレーム４上の、前部の左右中央部には作業機５を、後部にはカウンタウエイト６を、前部の左右いずれか一側（本例では左側）には運転室７を夫々設けている。また、カウンタウエイト６と運転室７の間に機械室８ａ，８ｂを設けている。さらに、運転室７の後面に近接して、門型フレーム１０Ａ（運転室保護フレーム１０Ａ、第１実施形態）又は門型フレーム１０Ｂ（運転室保護フレーム１０Ｂ、第２実施形態）が設けられている。 In FIG. 1, a hydraulic excavator 1 has an upper swing body frame 4 mounted on a lower traveling body 3 so as to be capable of swinging. Is provided with a counterweight 6, and a cab 7 is provided on one of the left and right sides of the front (left side in this example). Machine rooms 8 a and 8 b are provided between the counterweight 6 and the cab 7. Further, a portal frame 10A ( operator compartment protection frame 10A, the first embodiment) or a portal frame 10B ( operator compartment protection frame 10B, the second embodiment) is provided close to the rear surface of the operator cab 7. .

図２において、運転室７は上部旋回体フレーム４の前部左側に防振材７ｂを介して搭載されている。また門型フレーム１０Ａは、運転室７の後面上辺７ａに近接して同上辺７ａに略平行に設けられる運転室保護部材１１と、該運転室保護部材１１の左右に取り付けられ、かつ上下方向に立てて設けられる左右の支柱１２Ａ，１３Ａ（支持部材１２Ａ，１３Ａ）とを備えている。左右支柱１２Ａ，１３Ａの上下方向中間部の間には、補強部材１４が取り付けられている。左右の支柱１２Ａ，１３Ａの下部は、上部旋回体フレーム４の取付部上面に穴明けされた所定数のネジ穴４ａに所定数のボルト１９（取付部材１９）で締結されている。 In FIG. 2, the cab 7 is mounted on the left side of the front part of the upper swing frame 4 via a vibration isolator 7 b. The portal frame 10A is attached to the left and right sides of the cab protection member 11 provided in the vicinity of the upper side 7a of the cab 7 and substantially parallel to the upper side 7a. Left and right support columns 12A and 13A (support members 12A and 13A) provided upright are provided . A reinforcing member 14 is attached between the middle portions in the vertical direction of the left and right columns 12A, 13A. The lower portions of the left and right struts 12A and 13A are fastened with a predetermined number of bolts 19 (mounting members 19) to a predetermined number of screw holes 4a drilled in the upper surface of the mounting portion of the upper swing frame 4.

第１実施形態の構成によると、次の作用及び効果が得られる。
（１）油圧ショベル１がロールオーバした時に、門型フレーム１０Ａの運転室保護部材１１及び作業機５が接地することによって、油圧ショベル１は門型フレーム１０Ａ及び作業機５で支持されるため、この間に位置する運転室７の変形が防止または抑制される。これにより、運転室７内のオペレータ空間が確保される。
（２）このとき、運転室７の後面に近接して門型フレーム１０Ａを設けるだけで、運転室保護部材１１を設置することが可能となっており、これによって、小型から大型の建設機械にわたって容易にかつ安いコストで強固な運転室保護フレーム１０Ａを設けることができる。 According to the configuration of the first embodiment, the following operations and effects can be obtained.
(1) When the excavator 1 rolls over, the cab protection member 11 of the portal frame 10A and the work machine 5 are grounded, so that the excavator 1 is supported by the portal frame 10A and the work machine 5. Deformation of the cab 7 located in the meantime is prevented or suppressed. Thereby, the operator space in the cab 7 is ensured.
(2) At this time, it is possible to install the cab protection member 11 simply by providing the portal frame 10A in the vicinity of the rear surface of the cab 7, and thereby, from small to large construction machines. The strong cab protection frame 10A can be provided easily and at a low cost.

（３）運転室７の後面に近接して門型フレーム１０Ａを設けるだけで、運転室保護フレームを設置することができ、これによって、油圧ショベル１の外形寸法を増大させずに運転室保護フレームを設けることができる。これにより、油圧ショベル１の輸送性及び組立分解作業性を向上できる。
（４）また、運転室７の前部及び上部には従来のキャブガードが無くなり、前方、側方及び上方の視界性を向上できる。また、運転室７の後面に近接して設けた門型フレーム１０Ａは運転室７の後面壁後方に位置するので、後方視界性を妨げることがない。 (3) The cab protection frame can be installed only by providing the portal frame 10A in the vicinity of the rear surface of the cab 7, and thus the cab protection frame can be installed without increasing the external dimensions of the excavator 1. Can be provided. Thereby, the transportability and assembly / disassembly workability of the hydraulic excavator 1 can be improved.
(4) Moreover, the conventional cab guard is eliminated at the front and upper portions of the cab 7, and the visibility of the front, side and upper sides can be improved. Further, the portal frame 10A provided in the vicinity of the rear surface of the cab 7 is located behind the rear wall of the cab 7, so that the rear visibility is not hindered.

次に図３により、第２実施形態の説明をする。図３は、第２実施形態に係る建設機械の要部斜視図である。なお、図１〜図２の構成と略同一機能を有する構成要素には同一の符合を付してここでの説明を省略し、以後同様とする。   Next, the second embodiment will be described with reference to FIG. FIG. 3 is a perspective view of a main part of the construction machine according to the second embodiment. It should be noted that components having substantially the same functions as those in FIGS. 1 to 2 are denoted by the same reference numerals, description thereof is omitted, and the same applies hereinafter.

門型フレーム１０Ｂは、運転室７の後面上辺７ａに近接して設けられる運転室保護部材１１と、該運転室保護部材１１の左右に取り付けられ、かつ上下方向に立てて設ける左右の支柱１２Ａ，１３Ｂ（支持部材１２Ａ，１３Ｂ）と、該左右支柱１２Ａ，１３Ｂの上下方向中間部間に取り付けられた補強部材１４とを備えている。上部旋回体フレーム４に設けられ、かつ作業機５（図１参照）の基端部を上下揺動自在に支持する左右１対の縦板部材４ｂ，４ｂのうち、運転室側の縦板部材４ｂの外側面には取付座４ｃが設けられており、車体内側に設けられた前記支柱１３Ｂは、前記取付座４ｃの所定数のボルト穴４ｄに所定数のボルト１９で車体内側から（すなわち左右１対の縦板部材４ｂ，４ｂの間の方向から）締結されている。 The portal frame 10B includes a cab protection member 11 provided in the vicinity of the rear upper side 7a of the cab 7, and left and right struts 12A attached to the left and right of the cab protection member 11 and provided vertically. 13B (support members 12A and 13B) and a reinforcing member 14 attached between the middle portions in the vertical direction of the left and right support columns 12A and 13B. Of the pair of left and right vertical plate members 4b, 4b provided on the upper swing frame 4 and supporting the base end portion of the working machine 5 (see FIG. 1) so as to be swingable up and down, the vertical plate member on the cab side. the outer surface of 4b have mounting seat 4c is provided, the struts 13B provided inside the vehicle body, the (i.e. the left and right from the vehicle body inside a predetermined number of bolts 19 to a predetermined number of bolt holes 4d of the mounting seat 4c Fastened (from the direction between the pair of vertical plate members 4b, 4b).

第２実施形態の構成により、第１実施形態に加えて次の作用及び効果が得られる。
（１）門型フレーム１０Ｂの内側の支柱１３Ｂを外側の支柱１２Ａよりも短くして、上部旋回体フレーム４の高い位置にある取付座４ｃに取り付けるので、これによって門型フレーム１０Ｂの強度をより高くできる。
（２）内側の支柱１３Ｂの上部旋回体フレーム４への取付部に、上部旋回体フレーム４の中央上方から、即ち油圧ショベル１の上方から作業者がアクセスすることが可能となっている。これによってアクセスが容易で、しかも前記取付部周囲に大きな作業スペースを確保できるので、門型フレーム１３Ｂの組立分解作業性をより向上できる。 With the configuration of the second embodiment, the following operations and effects can be obtained in addition to the first embodiment.
(1) The inner column 13B of the portal frame 10B is shorter than the outer column 12A and is mounted on the mounting seat 4c at a higher position of the upper swing frame 4 so that the strength of the portal frame 10B is further increased. Can be high.
(2) An operator can access the attachment portion of the inner support column 13B to the upper swing frame 4 from above the center of the upper swing frame 4, that is, from above the excavator 1 . As a result, access is easy and a large working space can be secured around the mounting portion, so that the assembling / disassembling workability of the portal frame 13B can be further improved.

次に図４により、第３実施形態の説明をする。図４は第３実施形態に係る建設機械の要部斜視図である。
門型フレーム１０Ｃ（運転室保護フレーム１０Ｃ）は、運転室７の後面上辺７ａに近接して設けられる運転室保護部材１１と、該運転室保護部材１１の左右に取り付けられ、かつ上下方向に立てて設ける左右の支柱１２Ｂ，１３Ｃ（支持部材１２Ｂ，１３Ｃ）と、該左右支柱１２Ｂ，１３Ｃの上下方向中間部間に取り付けられた補強部材１４とを備えている。門型フレーム１０Ｃは運転室７後方に隣接する機械室８ｂを跨いで設けられている。門型フレーム１０Ｃの左右の支柱１２Ｂ，１３Ｃは夫々、上部旋回体フレーム４の外側面に設けられた取付座４ｅの所定数のネジ穴４ｆ、及び前述の左右１対の縦板部材４ｂ，４ｂのうち運転室側縦板部材４ｂの上面に立てて設けられた取付座４ｇの所定数のボルト穴４ｈに、所定数のボルト１９で締結されている。 Next, the third embodiment will be described with reference to FIG. FIG. 4 is a perspective view of an essential part of the construction machine according to the third embodiment.
The gate-type frame 10C (operating room protection frame 10C) is attached to the left and right sides of the operating room protection member 11 provided in the vicinity of the upper side 7a of the rear surface of the operating room 7, and stands vertically. The left and right support columns 12B and 13C (support members 12B and 13C) and the reinforcing member 14 attached between the vertical intermediate portions of the left and right support columns 12B and 13C are provided. The portal frame 10 </ b> C is provided across the machine room 8 b adjacent to the rear of the cab 7. The left and right struts 12B and 13C of the portal frame 10C are respectively a predetermined number of screw holes 4f of the mounting seat 4e provided on the outer surface of the upper swing frame 4 and the pair of left and right vertical plate members 4b and 4b. Among them, a predetermined number of bolts 19 are fastened to a predetermined number of bolt holes 4h of a mounting seat 4g provided upright on the upper surface of the cab side vertical plate member 4b.

第３実施形態の構成により、前記第２実施形態に加えて次の作用及び効果が得られる。
門型フレーム１０Ｃは、運転室７後方に隣接する機械室８ｂ（図１、図４参照）に影響をおよぼすことなく取り付けることが可能となっており、これによって、既設の建設機械に追加的に取り付けることができる。これによって、基本仕様の建設機械にオプションで容易に門型フレーム１０Ｃ（運転室保護用フレーム）を取り付けることができる。また、これにより、門型フレーム１０Ｃを、状況に応じて簡単に着脱できる。 With the configuration of the third embodiment, the following operations and effects can be obtained in addition to the second embodiment.
The gate-type frame 10C can be attached without affecting the machine room 8b (see FIGS. 1 and 4) adjacent to the rear of the cab 7, thereby adding to the existing construction machine. Can be attached . As a result, the gate-type frame 10C (operating room protection frame) can be easily attached as an option to the construction machine of the basic specification. This also allows the portal frame 10C to be easily attached and detached according to the situation.

次に図５により、第４実施形態の説明をする。図５は第４実施形態に係る建設機械の要部斜視図である。   Next, a fourth embodiment will be described with reference to FIG. FIG. 5 is a perspective view of a main part of the construction machine according to the fourth embodiment.

油圧ショベル２は、後部の旋回半径を車幅内に略収まるようにした後方小旋回型油圧ショベルとなっており、該油圧ショベル２のカウンタウエイト６の上面には、運転室７の後面上辺７ａに向って斜めに突き出して設けるガードフレーム２０Ａ（運転室保護フレーム２０Ａ）が所定数のボルト１９で取り付けられている。このガードフレーム２０Ａは、運転室７後面の上辺７ａに近接して同上辺７ａに略平行に設けられる運転室保護部材１１と、該運転室保護部材１１の左右部に斜め後下方に向けて取り付けられた左右１対のアーム状部材２１，２２（支持部材２１，２２）と、該左右のアーム状部材２１，２２の下端部間を連結し、かつカウンタウエイト６に取り付けられるフランジ部材２３とを備えている。 The hydraulic excavator 2 is a rear small turning type hydraulic excavator in which the turning radius of the rear part is substantially within the vehicle width, and the upper surface 7a of the rear surface of the cab 7 is formed on the upper surface of the counterweight 6 of the hydraulic excavator 2. A guard frame 20 </ b> A (operating room protection frame 20 </ b> A) provided obliquely projecting toward is attached with a predetermined number of bolts 19. The guard frame 20A includes a cab protection member 11 provided substantially parallel to the upper side 7a close to the upper side 7a of the cab 7 rear, downward obliquely rearward to the left and right portions of the operator's cab protection member 11 attached A pair of left and right arm-shaped members 21 and 22 (support members 21 and 22), and a flange member 23 that connects the lower ends of the left and right arm-shaped members 21 and 22 and is attached to the counterweight 6. I have.

第４実施形態の構成により、次の作用及び効果が得られる。
（１）油圧ショベル２がロールオーバした時に、油圧ショベル２はガードフレーム２０Ａの運転室保護部材１１及び作業機５で支持されるため、この間に位置する運転室７の変形及び損傷が防止または抑制されるので、運転室７内のオペレータ空間が確保される。
（２）このとき、カウンタウエイト６にガードフレーム２０Ａを設けることにより、運転室保護部材１１を運転室７の後面上辺７ａに近接して設置することができるので、小型から大型の建設機械にわたって容易に且つ安いコストで強固な運転室保護フレームを設けることができる。 With the configuration of the fourth embodiment, the following operations and effects can be obtained.
(1) When the hydraulic excavator 2 rolls over, the hydraulic excavator 2 is supported by the cab protection member 11 of the guard frame 20A and the work implement 5, so that deformation and damage of the cab 7 positioned therebetween are prevented or suppressed. Therefore, an operator space in the cab 7 is secured.
(2) At this time, by providing the guard weight 20A on the counterweight 6, the cab protection member 11 can be installed close to the upper side 7a of the rear surface of the cab 7, so that it can be easily applied from small to large construction machines. In addition, a strong cab protection frame can be provided at a low cost.

（３）カウンタウエイト６にガードフレーム２０Ａを設けるだけで、運転室保護フレームを設置できるため、油圧ショベル２の外形寸法を増大させずに運転室保護フレームを設けることができる。これにより、油圧ショベル２の輸送性及び組立分解作業性を向上できる。
（４）また、運転室７の前部及び上部には従来のキャブガードが無いので、前方、側方及び上方の視界性を向上できる。 (3) Since the cab protection frame can be installed simply by providing the guard weight 20A on the counterweight 6, the cab protection frame can be provided without increasing the external dimensions of the excavator 2. Thereby, the transportability and assembly / disassembly workability of the hydraulic excavator 2 can be improved.
(4) Moreover, since there is no conventional cab guard in the front part and the upper part of the cab 7, the visibility of the front, the side, and the upper side can be improved.

（５）さらに、後方小旋回型の油圧ショベル２の如く、上部旋回体フレーム４上の面積が狭くて、それによって上部旋回体フレーム４上に、前述の第１実施形態で示したような前記門型フレーム１０Ａ（図１、図２参照）を設けることが困難な場合においても、カウンタウエイト６を基底にして運転室保護フレーム（ガードフレーム２０Ａ）を設けることができる。従って、後方小旋回型油圧ショベル２の輸送性及び組立分解作業性を損なうことがない。これらにより、小型の建設機械においても、容易に且つ安いコストで運転室保護フレームを設けることができる。
（６）さらにまた、カウンタウエイト６にガードフレーム２０Ａを取り付けているので、この取付が他の機器の取付に影響を及ぼさない。このため、基本仕様の建設機械にオプションでガードフレーム２０Ａを取り付けることができる。また、状況に応じてガードフレーム２０Ａの着脱を容易に行うことができる。 (5) Further, the area on the upper swing body frame 4 is narrow like the rear small swing type hydraulic excavator 2, so that the upper swing body frame 4 has the above-described first embodiment as shown in the first embodiment. Even when it is difficult to provide the portal frame 10A (see FIGS. 1 and 2), the cab protection frame (guard frame 20A) can be provided with the counterweight 6 as a base. Accordingly, the transportability and assembly / disassembly workability of the rear small turning hydraulic excavator 2 are not impaired. As a result, even in a small construction machine, the cab protection frame can be provided easily and at a low cost.
(6) Furthermore, since the guard frame 20A is attached to the counterweight 6, this attachment does not affect the attachment of other devices. For this reason, the guard frame 20A can be optionally attached to the construction machine of the basic specification. Also, the guard frame 20A can be easily attached and detached according to the situation.

次に図６により、第５実施形態の説明をする。図６は第５実施形態に係る建設機械の要部斜視図である。   Next, a fifth embodiment will be described with reference to FIG. FIG. 6 is a perspective view of main parts of a construction machine according to the fifth embodiment.

油圧ショベル２のカウンタウエイト６上面には、運転室７の後面上辺７ａに向って突き出して設けるガードフレーム２０Ｂ（運転室保護フレーム２０Ｂ）が所定数のボルト１９で取り付けられている。このガードフレーム２０Ｂは、運転室７の後面上辺７ａに近接して同上辺７ａに略平行に設けられる運転室保護部材１１と、該運転室保護部材１１の左右に後方へ向けて取り付けられた左右１対のアーム状部材２１，２２と、該左右１対のアーム状部材２１，２２の後端部を取り付け、これら部材１１，２１，２２を支持する門型フレーム２４を備えている。門型フレーム２４は、左右の支柱２５，２６（支持部材２５，２６）の上端間をビーム２７で結合し、前記支柱２５，２６夫々の下端部にフランジ２５ａ，２６ａを設けている。 On the upper surface of the counterweight 6 of the excavator 2, a guard frame 20 </ b> B (operating room protection frame 20 </ b > B) provided so as to protrude toward the upper rear side 7 a of the cab 7 is attached with a predetermined number of bolts 19. The guard frame 20B includes a cab protection member 11 provided in the vicinity of the rear upper side 7a of the cab 7 and substantially parallel to the upper side 7a, and left and right sides attached to the left and right of the cab protection member 11 rearward. A pair of arm-shaped members 21 and 22 and rear end portions of the pair of left and right arm-shaped members 21 and 22 are attached , and a portal frame 24 that supports these members 11, 21 and 22 is provided. In the portal frame 24, the upper ends of the left and right support columns 25 and 26 (support members 25 and 26) are coupled by a beam 27, and flanges 25a and 26a are provided at the lower ends of the support columns 25 and 26, respectively.

第５実施形態の構成によると、ガードフレーム２０Ｂは、カウンタウエイト６の中央部の前後方向厚みが少ない場合においても取り付け可能としている。それ以外は、第４実施形態における作用及び効果に同じであり、説明を省く。 According to the configuration of the fifth embodiment, the guard frame 20B can be attached even when the thickness of the central portion of the counterweight 6 is small. Other than that, it is the same as the operation and effect in the fourth embodiment, and the description is omitted.

なお、第１実施形態〜第５実施形態で示した構成において、運転室７と運転室保護部材１１は相互に側面視で重ならない構成としたが、これに限ることなく、例えば上部等一部が重なる構成でも構わない。
また例えば、運転室７と運転室保護部材１１とをゴム等弾性部材を有する防振材（図示せず。）を介して連結することによって、前記防振材７ｂ（図２参照）を介して上部旋回体フレーム４上に搭載された運転室７の過度な揺動を、運転室７と運転室保護部材１１間の上記防振材で容易に抑止することができる。 In the configurations shown in the first to fifth embodiments, the cab 7 and the cab protection member 11 are configured so as not to overlap each other in a side view. It is also possible to have a configuration in which.
Further, for example, by connecting the cab 7 and the cab protection member 11 via a vibration isolator (not shown) having an elastic member such as rubber, the vibration isolator 7b (see FIG. 2) is connected. Excessive rocking of the cab 7 mounted on the upper swing body frame 4 can be easily suppressed by the above-mentioned vibration isolating material between the cab 7 and the cab protection member 11.

なおまた、門型フレーム１０Ａ，１０Ｂ，１０Ｃはいずれも補強部材１４を有しているが、これに限ることなく、補強部材の有無及びその形状は適用機械、必要な強度、外観等を考慮して任意に選択してもよい。さらに、門型フレーム１０Ａ，１０Ｂ，１０Ｃ、及びガードフレーム２０Ａ，２０Ｂに用いる部材は、角材、丸棒材、及びパイプ材等を使用することができ、溶接構造物だけでなく、パイプ材の曲げ加工したもの、及びこれらの組合せ等で構成してもよい。   The portal frames 10A, 10B, and 10C all have the reinforcing member 14. However, the present invention is not limited to this, and the presence or absence of the reinforcing member and the shape thereof take into consideration the applied machine, required strength, appearance, and the like. May be selected arbitrarily. Further, as the members used for the gate-type frames 10A, 10B, 10C and the guard frames 20A, 20B, square bars, round bars, pipes, and the like can be used. You may comprise what was processed and those combination.

以上説明したように、本発明によると、建設機械の運転室の後面上方に近接して設けた運転室保護部材を有する運転室保護フレーム（実施形態の門型フレーム１０Ａ，１０Ｂ，１０Ｃ、及びガードフレーム２０Ａ，２０Ｂ等）を、上部旋回体フレーム上に、又はカウンタウエイト上に、取り付けている。そして、当該建設機械がロールオーバした時に、前記運転室保護フレームと、車体フレーム（実施形態では上部旋回体フレーム）の前部に設けた作業機とで運転室を支持するようにしている。これにより、運転室保護フレームの部品点数が低減され、運転室保護フレームを安いコストで製造でき、またその取付箇所も少なく組立分解時の作業性を向上できる。 As described above, according to the present invention, the cab protection frame (the portal frame 10A, 10B, 10C of the embodiment and the guard) having the cab protection member provided close to the rear upper surface of the cab of the construction machine is provided. Frames 20A, 20B, etc.) are mounted on the upper swing frame or on the counterweight . When the construction machine rolls over, the driver's cab is supported by the driver's cab protection frame and a work machine provided at the front of the vehicle body frame (the upper swing body frame in the embodiment) . As a result , the number of parts of the cab protection frame is reduced, the cab protection frame can be manufactured at a low cost, and the number of attachment points is small, and the workability during assembly / disassembly can be improved.

また、運転室の後方にのみ運転室保護フレームを設けたので、運転室からの前方及び上方の視界性も向上できる。また、運転室保護フレームの車体内側の取付部を、車体フレームの作業機支持フレームに取り付けるようにすることで、運転室保護フレームの組立分解作業性をさらに向上できる。さらに、油圧ショベルに適用する場合、運転室保護フレームは上部旋回体の旋回範囲内に設けることができるので、旋回範囲及び最大車幅を増大させることがなく、油圧ショベルの輸送性を損ねることが無い。 Further, since the cab protection frame is provided only behind the cab, the visibility ahead and above from the cab can be improved. Moreover, the assembly / disassembly workability of the cab protection frame can be further improved by attaching the mounting portion of the cab protection frame inside the vehicle body to the work machine support frame of the vehicle body frame. Furthermore, when applied to a hydraulic excavator, the cab protection frame can be provided within the turning range of the upper swing body, so that the turning range and the maximum vehicle width are not increased, and the transportability of the hydraulic excavator may be impaired. No.

本発明は、車体フレーム上に作業機及び運転室を設けた建設機械に適用可能であり、油圧ショベルの他、クレーン車、林業機械（木材運搬車等）等にも適用できる。   The present invention can be applied to a construction machine in which a work machine and a driver's cab are provided on a body frame, and can be applied to a crane vehicle, a forestry machine (such as a timber truck), and the like in addition to a hydraulic excavator.

本発明の実施形態に係る建設機械の斜視図である。1 is a perspective view of a construction machine according to an embodiment of the present invention. 本発明の第１実施形態に係る建設機械の要部斜視図である。It is a principal part perspective view of the construction machine which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る建設機械の要部斜視図である。It is a principal part perspective view of the construction machine which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る建設機械の要部斜視図である。It is a principal part perspective view of the construction machine which concerns on 3rd Embodiment of this invention.

本発明の第４実施形態に係る建設機械の要部斜視図である。It is a principal part perspective view of the construction machine which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る建設機械の要部斜視図である。It is a principal part perspective view of the construction machine which concerns on 5th Embodiment of this invention. 従来技術による建設機械の側面図である。It is a side view of the construction machine by a prior art. 従来技術による建設機械の要部斜視図である。It is a principal part perspective view of the construction machine by a prior art.

符号の説明Explanation of symbols

１，２…油圧ショベル、３…下部走行体、４…上部旋回体フレーム、４ｂ…縦板部材、５…作業機、６…カウンタウエイト、７…運転室、７ａ…後面上辺、８ａ，８ｂ…機械室、１０Ａ…門型フレーム、１０Ｂ…門型フレーム、１０Ｃ…門型フレーム、１１…運転室保護部材、１２Ａ，１２Ｂ…支柱、１３Ａ，１３Ｂ…支柱、１３Ｃ…支柱、２０Ａ…ガードフレーム、２０Ｂ…ガードフレーム、２１，２２…アーム状部材、２４…門型フレーム。 DESCRIPTION OF SYMBOLS 1, 2 ... Hydraulic excavator, 3 ... Lower traveling body, 4 ... Upper turning body frame, 4b ... Vertical plate member, 5 ... Working machine, 6 ... Counterweight, 7 ... Driver's cab, 7a ... Rear side upper side, 8a, 8b ... Machine room , 10A ... portal frame, 10B ... portal frame, 10C ... portal frame, 11 ... cab protection member, 12A, 12B ... column, 13A, 13B ... column, 13C ... column, 20A ... guard frame, 20B ... guard frame, 21, 22 ... arm-shaped member, 24 ... portal frame.

Claims (4)

車体フレーム上に運転室及び作業機をそれぞれ設けた建設機械において、
運転室(7)の後面上辺(7a)に近接して、該上辺(7a)に略平行な運転室保護部材(11)を配設した
ことを特徴とする建設機械。 In construction machines with cabs and work machines on the body frame,
A construction machine characterized in that a cab protection member (11) substantially parallel to the upper side (7a) is disposed in the vicinity of the upper side (7a) of the rear surface of the cab (7). 請求項１記載の建設機械において、
前記運転室保護部材(11)の左右部に上下方向に立設した少なくとも２本の支柱(12A,13A)を有する門型フレーム(10A)を、運転室(7)の後面に近接して配設した
ことを特徴とする建設機械。 The construction machine according to claim 1,
A portal frame (10A) having at least two struts (12A, 13A) erected in the vertical direction on the left and right sides of the cab protection member (11) is arranged close to the rear surface of the cab (7). A construction machine characterized by installation. 請求項１記載の建設機械において、
前記運転室保護部材(11)を上部前端部に有し、かつ下部基端部をカウンタウエイト(6)の上部に取り付けたガードフレーム(20A)を、運転室(7)の後面に近接して配設した
ことを特徴とする建設機械。 The construction machine according to claim 1,
The guard frame (20A) having the cab protection member (11) at the upper front end and the lower base end attached to the upper portion of the counterweight (6) is placed close to the rear surface of the cab (7). A construction machine characterized by being arranged. 請求項２記載の建設機械において、
前記門型フレーム(10A)の支柱(12A,13B)のうち、車体内側の支柱(13B)の基端部を、車体フレーム(4)の縦板部材(4b)に取り付ける
ことを特徴とする建設機械。 The construction machine according to claim 2,
The construction characterized in that the base end of the pillar (13B) inside the vehicle body among the pillars (12A, 13B) of the portal frame (10A) is attached to the vertical plate member (4b) of the vehicle body frame (4). machine.
JP2003270009A 2003-07-01 2003-07-01 Construction machinery Pending JP2005023718A (en)

Priority Applications (6)

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JP2003270009A JP2005023718A (en) 2003-07-01 2003-07-01 Construction machinery
US10/871,816 US20050000121A1 (en) 2003-07-01 2004-06-17 Construction equipment
CNA2004100593605A CN1576470A (en) 2003-07-01 2004-06-18 Construction machines
DE102004029960A DE102004029960A1 (en) 2003-07-01 2004-06-21 Construction machinery
GB0414374A GB2404360A (en) 2003-07-01 2004-06-28 Protection frame for roll over protection of construction machines
KR1020040049961A KR20050004032A (en) 2003-07-01 2004-06-30 Construction machine

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CN (1) CN1576470A (en)
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GB (1) GB2404360A (en)

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CN1576470A (en) 2005-02-09
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KR20050004032A (en) 2005-01-12
GB0414374D0 (en) 2004-07-28

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