JP2011099283A - Upper frame of construction machine - Google Patents

Upper frame of construction machine Download PDF

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JP2011099283A
JP2011099283A JP2009255802A JP2009255802A JP2011099283A JP 2011099283 A JP2011099283 A JP 2011099283A JP 2009255802 A JP2009255802 A JP 2009255802A JP 2009255802 A JP2009255802 A JP 2009255802A JP 2011099283 A JP2011099283 A JP 2011099283A
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center section
upper frame
weight
support member
weight support
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JP5077330B2 (en
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Toshiro Ueda
登志郎 植田
Kenichi Fujimoto
健一 藤本
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To efficiently bear a torsion load applied to an upper frame by a counterweight by dispersing the torsion load to the whole upper frame including right and left side decks as well as a center section. <P>SOLUTION: Beam members 18-20 are mounted to the respective rear ends of the center section D and right and left side decks E, F constituting the upper frame 13 of deck structure, in the mutually connected state of the ends to constitute a weight support member 15 extended over the whole width of a vehicle width direction. A center section and both right and left side sections of the weight support member 15 are provided with weight mounting parts 23-25, and the counterweight 9 is mounted to the respective weight mounting parts 23-25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は油圧ショベル等の建設機械の上部旋回体を構成するアッパーフレームであって、センターセクションの左右両側にサイドデッキを連結して構成されるデッキ構造のアッパーフレームに関するものである。   The present invention relates to an upper frame that constitutes an upper swing body of a construction machine such as a hydraulic excavator, and has a deck structure in which side decks are connected to the left and right sides of a center section.

油圧ショベルを例にとって背景技術を説明する。   The background art will be described using a hydraulic excavator as an example.

油圧ショベルは、図５に示すようにクローラ式の下部走行体１上に上部旋回体２が地面に対して垂直な縦軸（旋回中心）Ｏまわりに旋回自在に搭載され、この上部旋回体２のベースとなるアッパーフレーム３に、キャビン４や各種機器類が搭載されるとともに、同フレーム３の前部に、ブーム５、アーム６、バケット７を備えた作業アタッチメント８、後端部にカウンタウェイト９がそれぞれ装着されて構成される。   As shown in FIG. 5, the excavator is mounted on a crawler-type lower traveling body 1 so that an upper swing body 2 can be swung around a vertical axis (rotation center) O perpendicular to the ground. A cabin 4 and various devices are mounted on an upper frame 3 serving as a base of the vehicle, a work attachment 8 including a boom 5, an arm 6 and a bucket 7 is provided at the front of the frame 3, and a counterweight is provided at the rear end. 9 is mounted and configured.

なお、この明細書においてはキャビン４の位置を左側前部とし、これを基準に「左右」及び「前後」の方向性をいうものとする。   In this specification, the position of the cabin 4 is the left front portion, and the directions of “left and right” and “front and rear” are defined based on this position.

図６にアッパーフレーム３の全体概略構成を示す。   FIG. 6 shows an overall schematic configuration of the upper frame 3.

このアッパーフレーム３は、車幅方向の中央に位置するセンターセクションＡと、このセンターセクションＡの左右両側に連結された左右のサイドデッキＢ,Ｃによって構成されている。   The upper frame 3 includes a center section A located in the center in the vehicle width direction and left and right side decks B and C connected to the left and right sides of the center section A.

センターセクションＡは、側面視ほぼ三角形に形成された左右一対の縦板１０，１０を前後複数個所で枠材や板材等(符号省略)で連結して成り、縦板１０，１０の前部に図５中の作業アタッチメント８が取付けられる。   The center section A is formed by connecting a pair of left and right vertical plates 10 and 10 formed in a substantially triangular shape when viewed from the side by a frame material or a plate material (not shown) at a plurality of front and rear locations. The work attachment 8 in FIG. 5 is attached.

左右のサイドデッキＢ，Ｃは、梁材が縦横に組まれて構成され、横梁材の一端がセンターセクションＡに溶接結合される。   The left and right side decks B and C are formed by assembling beam members vertically and horizontally, and one end of the beam member is welded to the center section A.

このうち、左サイドデッキＢの前部にキャビン４、右サイドデッキＣに図示しない機器類がそれぞれ搭載される。   Among these, equipment (not shown) is mounted on the cabin 4 and the right side deck C on the front side of the left side deck B, respectively.

このように、センターセクションＡと左右のサイドデッキＢ，Ｃとを連結して構成される所謂デッキ構造のアッパーフレーム３において、従来は、センターセクションＡの両縦板１０，１０の後端部を後方に延ばし、かつ、取付穴１１，１１を設けてウェイト支持部１０ａ，１０ａを形成し、このウェイト支持部１０ａ，１０ａに図５中のカウンタウェイト９をボルト等で取付ける構成がとられている(特許文献１，２参照)。   Thus, in the so-called deck structure upper frame 3 configured by connecting the center section A and the left and right side decks B and C, conventionally, the rear end portions of both the vertical plates 10 and 10 of the center section A are used. The weight support portions 10a and 10a are formed by extending the rearward and mounting holes 11 and 11, and the counter weight 9 in FIG. 5 is attached to the weight support portions 10a and 10a with bolts or the like. (See Patent Documents 1 and 2).

特開２００７−１２０２２１号公報JP 2007-120221 A 特開２００８−１０６４４４号公報JP 2008-106444 A

ところが、上記のようにカウンタウェイト９をセンターセクションＡのみに取付ける公知技術によると、走行時のカウンタウェイト９のローリング(左右回動)やピッチング(前後回動)等によるねじれ荷重の大半がセンターセクションＡに作用し、一部が、同セクションＡに結合された横梁材を通じて両側サイドデッキＢ，Ｃに伝達される。   However, according to the known technique in which the counterweight 9 is attached only to the center section A as described above, most of the torsional load due to rolling (left-right rotation) or pitching (back-and-forth rotation) of the counterweight 9 during traveling is the center section. A part is transmitted to the side decks B and C through the cross beam connected to the section A.

つまり、ねじれ荷重がアッパーフレーム３全体に分散されずにセンターセクションＡに集中するという、荷重支持効率の悪い構成となっている。   That is, the torsional load is not distributed over the entire upper frame 3 but concentrated on the center section A, resulting in a poor load support efficiency.

このため、センターセクションＡに両サイドデッキＢ，Ｃと比較して遥かに大強度を確保する必要があり、強度設計や製作、コストの面で不利となっていた。   For this reason, it is necessary to ensure far greater strength in the center section A than both side decks B and C, which is disadvantageous in terms of strength design, production, and cost.

そこで本発明は、デッキ構造をとりながら、カウンタウェイトによって作用するねじれ荷重を、センターセクションだけでなく両サイドデッキを含めたアッパーフレーム全体に分散して効率良く負担することができる建設機械のアッパーフレームを提供するものである。   Accordingly, the present invention provides an upper frame for a construction machine that can efficiently load by distributing the torsional load acting on the counterweight not only in the center section but also in the entire upper frame including both side decks while taking the deck structure. Is to provide.

請求項１の発明は、前部に作業アタッチメントが取付けられるセンターセクションと、このセンターセクションの左右両側に、梁材が縦横に組まれたデッキ構造の左、右両サイドデッキが連結されて成り、後端にカウンタウェイトが取付けられる建設機械のアッパーフレームにおいて、アッパーフレーム後端にウェイト支持部材を、上記左サイドデッキ、センターセクション、右サイドデッキの三者に跨って、かつ、三者に結合された状態で車幅方向の全幅に亘って取付け、このウェイト支持部材の車幅方向の中央部と左右両側を含む複数個所に、上記カウンタウェイトを取付けるためのウェイト取付部を設けたものである。   The invention of claim 1 comprises a center section to which a work attachment is attached at the front, and left and right side decks of a deck structure in which beams are assembled vertically and horizontally on both the left and right sides of the center section. In an upper frame of a construction machine where a counterweight is attached to the rear end, a weight support member is straddled across the three of the left side deck, the center section, and the right side deck and coupled to the three. In this state, it is attached over the entire width in the vehicle width direction, and weight attachment portions for attaching the counterweight are provided at a plurality of locations including the center portion of the weight support member in the vehicle width direction and the left and right sides.

請求項２の発明は、請求項１の構成において、上記センターセクション及び左右両サイドデッキの各後端に別々の梁材を、互いの車幅方向の端部同士が結合された状態で取付けることによって上記ウェイト支持部材を構成したものである。   According to a second aspect of the present invention, in the configuration of the first aspect, separate beam members are attached to the rear ends of the center section and the left and right side decks in a state where the ends in the vehicle width direction are coupled to each other. The weight support member is configured as described above.

請求項３の発明は、請求項１または２の構成において、上記ウェイト支持部材の車幅方向中央部のウェイト取付部と、左右両側のウェイト取付部とを前後方向に位置ずれして設けたものである。   According to a third aspect of the present invention, in the configuration of the first or second aspect, the weight mounting portion at the center portion in the vehicle width direction of the weight support member and the weight mounting portions on both the left and right sides are displaced in the front-rear direction. It is.

本発明によると、ウェイト支持部材によってセンターセクションと左右のサイドデッキの後端同士を連結・一体化し、このウェイト取付部材の車幅方向の複数個所に設けたウェイト取付部によって、カウンタウェイトをアッパーフレーム後端に車幅方向複数個所で取付ける構成としたから、第１に、走行時にカウンタウェイトのローリングやピッチング等によるねじれ荷重が、ウェイト支持部材を介してセンターセクションと左右のサイドデッキとに同時にかつ均等に加えられる。   According to the present invention, the center section and the rear ends of the left and right side decks are connected and integrated by the weight support member, and the counter weight is attached to the upper frame by the weight attachment portions provided at a plurality of positions in the vehicle width direction of the weight attachment member. Since it is configured to be attached to the rear end at a plurality of positions in the vehicle width direction, firstly, a torsional load due to rolling or pitching of the counterweight is simultaneously applied to the center section and the left and right side decks via the weight support member. Added evenly.

すなわち、ねじれ荷重を、従来のようにセンターセクションだけでなく、アッパーフレーム全体に分散して効率良く分担することができる。   That is, the torsional load can be efficiently distributed and distributed not only in the center section but also in the entire upper frame.

第２に、カウンタウェイトを車幅方向の中央部と左右両側を含む複数個所で支持することにより、ねじれ荷重をカウンタウェイトの回転中心から離れた位置でも支持できるため、荷重そのものを抑制することができる。   Secondly, by supporting the counterweight at a plurality of locations including the center portion in the vehicle width direction and both the left and right sides, the torsional load can be supported even at a position away from the rotation center of the counterweight, so that the load itself can be suppressed. it can.

第３に、ウェイト支持部材で左右のサイドデッキをセンターセクションに連結することにより、両サイドデッキを、センターセクションの強度を補完する強度部材として寄与させることができる。   Third, by connecting the left and right side decks to the center section with weight support members, both side decks can contribute as strength members that complement the strength of the center section.

以上により、センターセクションの後端のみにウェイト取付部を設け、ねじれ荷重の大半をセンターセクションで受ける従来構造と比較して、センターセクションのみに大強度を確保する必要がなくなり、アッパーフレームの強度設計や製作、コストの面で有利となる。   As described above, a weight mounting part is provided only at the rear end of the center section, and compared to the conventional structure that receives most of the torsional load at the center section, there is no need to ensure a high strength only in the center section, and the upper frame strength design It is advantageous in terms of production and cost.

また、ウェイト支持部材に十分な重量を持たせることで補助カウンタウェイトとして機能させ、後方安定度を高めることができる。   Further, by giving the weight support member a sufficient weight, it can function as an auxiliary counterweight, and the rear stability can be enhanced.

この場合、請求項２の発明によると、センターセクション及び左右両サイドデッキの各後端に別々の梁材を、互いの車幅方向の端部同士が結合された状態で取付けることによってウェイト支持部材を構成したから、ウェイト支持部材を一連一体の梁材として三者に取付ける場合と比較して、とくにセンターセクションと両サイドデッキの後端が直線上に一致しない場合に、梁材を三者別々に取付けて互いの端部同士を結合すればよいことから、ウェイト支持部材の取付作業性が良いものとなる。   In this case, according to the invention of claim 2, the weight support member is attached by attaching separate beam members to the rear ends of the center section and the left and right side decks in a state where the ends in the vehicle width direction are coupled to each other. Compared to the case where the weight support members are attached to the three members as a series of integrated beam members, the beam members are separated separately, especially when the center section and the rear end of both side decks do not coincide on a straight line. Since it is only necessary to attach the end portions to each other and connect the end portions to each other, the workability of attaching the weight support member is improved.

請求項３の発明によると、ウェイト支持部材の車幅方向中央部のウェイト取付部と、左右両側のウェイト取付部とを前後方向に位置ずれして設けたから、とくにピッチング等による前後方向の荷重に対する支持力を高めることができる。また、カウンタウェイト取付時の前後方向の水平調整をシム等を用いて簡単に行うことができる。   According to the third aspect of the present invention, the weight mounting portion at the center in the vehicle width direction of the weight support member and the weight mounting portions on the left and right sides are provided to be displaced in the front-rear direction. Support force can be increased. Further, the horizontal adjustment in the front-rear direction when the counterweight is attached can be easily performed using a shim or the like.

本発明の実施形態にかかるアッパーフレームの斜視図である。It is a perspective view of the upper frame concerning the embodiment of the present invention. 同概略平面図である。It is the same schematic plan view. 図２の一部拡大図である。FIG. 3 is a partially enlarged view of FIG. 2. 図３の矢印Ｘ方向から見た図である。It is the figure seen from the arrow X direction of FIG. 本発明の適用対象例である油圧ショベルの概略側面図である。1 is a schematic side view of a hydraulic excavator that is an example to which the present invention is applied. 従来のアッパーフレームの概略平面図である。It is a schematic plan view of a conventional upper frame.

本発明の実施形態を図１〜４によって説明する。   An embodiment of the present invention will be described with reference to FIGS.

実施形態は、油圧ショベルの上部旋回体に用いられるアッパーフレームを適用対象としている。   The embodiment is applied to an upper frame used for an upper swing body of a hydraulic excavator.

実施形態において、
(ｉ) アッパーフレーム１３は、幅方向の中央に位置するセンターセクションＤと、このセンターセクションＤの左右両側に連結された左右のサイドデッキＥ,Ｆとからなるデッキ構造である点、
(ｉｉ) センターセクションＤは、側面視ほぼ三角形に形成された左右一対の縦板１４，１４を前後複数個所で枠材や板材等(符号省略)で連結して成り、この縦板１４，１４の前部に図５中の作業アタッチメント８が取付けられる点、
(ｉｉｉ) キャビン４が搭載される左サイドデッキＥ、及び機器類が搭載される右サイドデッキＦは、それぞれ梁材が縦横に組まれて成り、横梁材の一端がセンターセクションＤに溶接結合される点、
の各基本構成は、図６に示す従来技術と同じである。 In an embodiment,
(i) The upper frame 13 has a deck structure including a center section D located in the center in the width direction and left and right side decks E and F connected to the left and right sides of the center section D.
(ii) The center section D is formed by connecting a pair of left and right vertical plates 14, 14 formed in a substantially triangular shape when viewed from the side by a frame material or a plate material (not shown) at a plurality of front and rear portions. The work attachment 8 in FIG. 5 is attached to the front of
(iii) The left side deck E on which the cabin 4 is mounted and the right side deck F on which the equipment is mounted are formed by assembling beams in the vertical and horizontal directions, and one end of the horizontal beam is welded to the center section D. Point
Each basic configuration is the same as that of the prior art shown in FIG.

このアッパーフレーム１３においては、その後端にウェイト支持部材１５が、左サイドデッキＥ、センターセクションＤ、右サイドデッキＦの三者に跨って、かつ、三者に結合された状態で車幅方向の全幅に亘って水平に取付けられている。   In the upper frame 13, the weight support member 15 is disposed at the rear end of the upper frame 13 across the three sides of the left side deck E, the center section D, and the right side deck F in the vehicle width direction in a state of being coupled to the three. It is mounted horizontally across its entire width.

詳述すると、センターセクションＤにおいては左右の縦板１４，１４の後端間、左右のサイドデッキＥ，Ｆにおいては側枠１６，１７の後端と、近い側の縦板１４との間に、それぞれ厚板から成る別々の梁材１８，１９，２０が取付けられ、このこの梁材１８〜２０の相対向する端部同士が、図示のようにプレート２１，２２を介して間接的に溶接結合(直接溶接結合してもよい)されることにより、車幅全幅に亘るウェイト支持部材１５が構成されている。   Specifically, in the center section D, between the rear ends of the left and right vertical plates 14, 14, and in the left and right side decks E, F, between the rear ends of the side frames 16, 17 and the vertical plate 14 on the near side. Separate beam members 18, 19 and 20 each consisting of a thick plate are attached, and opposite ends of the beam members 18 to 20 are indirectly welded via plates 21 and 22 as shown in the figure. By being coupled (may be directly welded), the weight support member 15 is formed over the entire width of the vehicle.

ここで、センターセクションＤと左右のサイドデッキＥ，Ｆは、前者の後端が後者の後端よりも前方に位置するように寸法設定され、この寸法設定に基づき、図示のように左右の梁材１９，２０が傾斜する状態(ウェイト支持部材１５全体として直線状でなく上から見て左右両側が前向きに折れた状態)で取付けられている。   Here, the center section D and the left and right side decks E and F are dimensioned so that the rear end of the former is positioned forward of the rear end of the latter, and based on this dimension setting, the left and right beams as shown in the figure. The members 19 and 20 are attached in an inclined state (the weight support member 15 as a whole is not linear, but the left and right sides are folded forward as viewed from above).

このウェイト支持部材１５の車幅方向の中央部(中間梁材１８)と、左右両側部(左右の梁材１９，２０)の三個所に、ウェイト取付穴２３ａ，２４ａ，２５ａを有する角板材が水平に取付けられてウェイト取付部２３，２４，２５が形成され、カウンタウェイト９が中央部と左右両側部の三個所でこの各ウェイト取付部２３〜２５に図示しないボルトによって取付けられる。   Square plate members having weight attachment holes 23a, 24a, and 25a at three portions of the weight support member 15 in the vehicle width direction (intermediate beam member 18) and left and right side portions (left and right beam members 19 and 20) are provided. The weight mounting portions 23, 24, and 25 are horizontally mounted, and the counterweight 9 is mounted to the weight mounting portions 23 to 25 by bolts (not shown) at the three portions of the center portion and the left and right side portions.

この構成によると、次の作用効果を得ることができる。   According to this configuration, the following operational effects can be obtained.

(Ｉ) 走行時にカウンタウェイト９のローリングやピッチング等によるねじれ荷重が、ウェイト支持部材１５を介してセンターセクションＤと左右のサイドデッキＥ，Ｆとに同時にかつ均等に加えられる。   (I) Torsional load due to rolling or pitching of the counterweight 9 is applied to the center section D and the left and right side decks E and F simultaneously and evenly through the weight support member 15 during traveling.

すなわち、ねじれ荷重を、センターセクションＤだけでなく、アッパーフレーム１３全体に分散して効率良く分担することができる。   That is, the torsional load can be efficiently distributed and distributed not only in the center section D but also in the entire upper frame 13.

(ＩＩ) カウンタウェイト９を車幅方向の中央部と左右両側部の三個所で支持することにより、ねじれ荷重をカウンタウェイト９の回転中心(ウェイト幅方向の中心部)から左右に離れた位置でも支持できるため、荷重そのものを抑制することができる。   (II) By supporting the counterweight 9 at three locations in the center in the vehicle width direction and on both the left and right sides, the torsional load can be moved away from the center of rotation of the counterweight 9 (the center in the weight width direction). Since it can support, the load itself can be suppressed.

(ＩＩＩ) ウェイト支持部材１５で左右のサイドデッキＥ，ＦをセンターセクションＤに連結することにより、両サイドデッキＥ，Ｆを、センターセクションＤの強度(とくに後部強度)を補完する強度部材として寄与させることができる。   (III) By connecting the left and right side decks E and F to the center section D with the weight support member 15, both side decks E and F contribute as strength members that complement the strength (particularly the rear strength) of the center section D. Can be made.

以上により、図６に示すようにセンターセクションＡの後端のみにウェイト取付部１１を設け、ねじれ荷重の大半をセンターセクションＡで受ける従来構造と比較して、センターセクションＤのみに大強度を確保する必要がなくなり、アッパーフレーム１３の強度設計や製作、コストの面で有利となる。   As described above, as shown in FIG. 6, the weight attaching portion 11 is provided only at the rear end of the center section A, and the strength is ensured only in the center section D as compared with the conventional structure in which most of the torsional load is received by the center section A. This is advantageous in terms of strength design, manufacture, and cost of the upper frame 13.

また、ウェイト支持部材１５(梁材１８〜２０)に十分な重量を持たせることで、補助カウンタウェイトとして機能させ、後方安定度を高めることができる。   Moreover, by giving sufficient weight to the weight support member 15 (beam materials 18-20), it can function as an auxiliary | assistant counterweight and can improve back stability.

加えて、実施形態によると次の作用効果を得ることができる。   In addition, according to the embodiment, the following operational effects can be obtained.

(イ) センターセクションＤ及び左右両サイドデッキＥ，Ｆの各後端に別々の梁材１８〜２０を、互いの車幅方向の端部同士が結合された状態で取付けることによってウェイト支持部材１５を構成したから、ウェイト支持部材１５を一連一体の梁材として三者に取付ける場合と比較して、とくにこの実施形態のようにセンターセクションＤと両サイドデッキＥ，Ｆの後端が直線上に一致しない場合に、梁材１８〜２０を三者別々に取付けて互いの端部同士を結合すればよいことから、ウェイト支持部材１５の取付作業性が良いものとなる。   (A) The weight support member 15 is obtained by attaching separate beam members 18 to 20 to the rear ends of the center section D and the left and right side decks E and F in a state where the ends in the vehicle width direction are coupled to each other. Compared with the case where the weight support member 15 is attached to the three members as a series of integral beam members, the center section D and the rear ends of both side decks E and F are in a straight line as in this embodiment. If they do not match, it is only necessary to attach the beam members 18 to 20 separately and join the end portions to each other, so that the workability of attaching the weight support member 15 is improved.

(ロ) ウェイト支持部材１５の車幅方向中央部のウェイト取付部２３と、左右両側のウェイト取付部２４，２５とが前後方向に位置ずれしているため、すなわち、カウンタウェイト９の中央取付点と左右両側取付点との間に前後ピッチをとっているため、とくにピッチング等による前後方向の荷重に対する支持力を高めることができる。   (B) Since the weight mounting portion 23 at the center in the vehicle width direction of the weight support member 15 and the weight mounting portions 24, 25 on the left and right sides are displaced in the front-rear direction, that is, the center mounting point of the counterweight 9 Since the front-rear pitch is taken between the left and right side attachment points, the supporting force against the load in the front-rear direction due to pitching can be increased.

(ハ) 中央と左右両側の取付点が前後に位置ずれしているため、カウンタウェイト取付時の前後方向の水平調整を、シム等を用いた三個所での高さ調節によって簡単に行うことができる。   (C) Since the mounting points on the left and right sides of the center are shifted back and forth, horizontal adjustment in the front-rear direction when mounting the counterweight can be easily performed by adjusting the height at three locations using shims, etc. it can.

他の実施形態
(１) 上記実施形態では、センターセクションＤと左右両サイドデッキＥ，Ｆの各後端に別々の梁材１８〜２０を取付け、かつ、各梁財１８〜２０の端部同士を結合することによって車幅方向の全幅に亘るウェイト支持部材１５を構成したが、このウェイト支持部材１５を一連・一体に形成し、センターセクションＤ及び左右のサイドデッキＥ，Ｆに取付ける構成をとってもよい。 Other embodiments
(1) In the above embodiment, separate beam members 18-20 are attached to the rear ends of the center section D and the left and right side decks E, F, and the ends of the beam items 18-20 are joined together. The weight support member 15 extending over the entire width in the vehicle width direction is configured as described above. However, the weight support member 15 may be formed in a series and integrally and attached to the center section D and the left and right side decks E and F.

(２) ウェイト支持部材１５(梁材１８〜２０)として、厚板でなく、角パイプや丸パイプ等のパイプ材、Ｉ型やＣ型の型材、板材を断面Ｌ字形やＣ字形等に曲げ加工した枠材を用いてもよい。   (2) The weight support member 15 (beam members 18 to 20) is not a thick plate, but a pipe material such as a square pipe or a round pipe, an I-type or C-type die, or a plate material is bent into an L-shaped or C-shaped cross section. You may use the processed frame material.

(３) とくにカウンタウェイト９の前後調整が容易となる点で上記実施形態のように中央のウェイト取付部２３と左右両側のウェイト取付部２４，２５とを前後方向に位置ずれして設けるのが望ましいが、これらを直線上に並べて配置してもよい。   (3) In particular, the central weight mounting portion 23 and the left and right weight mounting portions 24 and 25 are provided so as to be displaced in the front-rear direction as in the above-described embodiment in that the counterweight 9 can be easily adjusted in the front-rear direction. Although desirable, these may be arranged side by side on a straight line.

(４) 上記実施形態では、ウェイト支持部材１５に角板を水平に取付けてウェイト取付部２３〜２５を形成したが、このウェイト取付部２３〜２５は、カウンタウェイト９の取付構造に応じて垂直形状やＬ字形等に形成してもよいし、横向きに設けてもよい。   (4) In the above embodiment, the square plate is horizontally attached to the weight support member 15 to form the weight attachment portions 23 to 25. However, the weight attachment portions 23 to 25 are vertical depending on the attachment structure of the counterweight 9. It may be formed in a shape, an L shape, or the like, or may be provided sideways.

(５) ウェイト取付部の設置個所は、上記実施形態のように中央部一個所と左右両側部各一個所の計三個所に限らず、たとえば中央部二個所、左右両側部各一個所の四個所に設け、あるいは中央部一個所、左右両側に左右に間隔を置いて二個所ずつの計五個所に設ける等、必要に応じて種々変更することができる。   (5) The weight mounting portion is not limited to three places, one in the center and one in each of the left and right sides as in the above embodiment. For example, there are four places in the center, two in the center and one in each of the left and right sides. Various modifications can be made as necessary, such as providing at one place, or at one central portion, and two places at left and right sides, with two spaces left and right.

８ 作業アタッチメント
９ カウンタウェイト
１３ アッパーフレーム
Ｄ アッパーフレームのセンターセクション
Ｅ 同、左サイドデッキ
Ｆ 同、右サイドデッキ
１４，１４ 縦板
１５ ウェイト支持部材
１８〜２０ ウェイト支持部材を構成する梁材
２１，２２ 梁材同士を結合するプレート
２３〜２５ ウェイト取付部 8 Work attachment 9 Counter weight 13 Upper frame D Center section of upper frame E Same as left side deck F Same as right side deck 14, 14 Vertical plate 15 Weight support member 18-20 Beams constituting weight support member 21, 22 Plate for connecting beam members 23-25 Weight attachment part

Claims (3)

前部に作業アタッチメントが取付けられるセンターセクションと、このセンターセクションの左右両側に、梁材が縦横に組まれたデッキ構造の左、右両サイドデッキが連結されて成り、後端にカウンタウェイトが取付けられる建設機械のアッパーフレームにおいて、アッパーフレーム後端にウェイト支持部材を、上記左サイドデッキ、センターセクション、右サイドデッキの三者に跨って、かつ、三者に結合された状態で車幅方向の全幅に亘って取付け、このウェイト支持部材の車幅方向の中央部と左右両側を含む複数個所に、上記カウンタウェイトを取付けるためのウェイト取付部を設けたことを特徴とする建設機械のアッパーフレーム。   A center section where work attachments are attached to the front, and left and right side decks of deck structures in which beams are assembled vertically and horizontally are connected to the left and right sides of this center section, and counterweights are attached to the rear end. In the upper frame of a construction machine, a weight support member is straddled across the three of the left side deck, the center section, and the right side deck and connected in the vehicle width direction at the rear end of the upper frame. An upper frame for a construction machine, characterized in that a weight attaching portion for attaching the counter weight is provided at a plurality of locations including the center portion in the vehicle width direction and the left and right sides of the weight support member. 上記センターセクション及び左右両サイドデッキの各後端に別々の梁材を、互いの車幅方向の端部同士が結合された状態で取付けることによって上記ウェイト支持部材を構成したことを特徴とする請求項１記載の建設機械のアッパーフレーム。   The weight support member is configured by attaching separate beam members to the rear ends of the center section and the left and right side decks in a state where ends in the vehicle width direction are coupled to each other. Item 10. The upper frame of a construction machine according to Item 1. 上記ウェイト支持部材の車幅方向中央部のウェイト取付部と、左右両側のウェイト取付部とを前後方向に位置ずれして設けたことを特徴とする請求項１または２記載の建設機械のアッパーフレーム。   The upper frame of a construction machine according to claim 1 or 2, wherein the weight attaching portion at the center in the vehicle width direction of the weight support member and the weight attaching portions on both the left and right sides are provided so as to be displaced in the front-rear direction. .
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