JP2018021354A - Cab of construction machine - Google Patents

Cab of construction machine Download PDF

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JP2018021354A
JP2018021354A JP2016152543A JP2016152543A JP2018021354A JP 2018021354 A JP2018021354 A JP 2018021354A JP 2016152543 A JP2016152543 A JP 2016152543A JP 2016152543 A JP2016152543 A JP 2016152543A JP 2018021354 A JP2018021354 A JP 2018021354A
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window
seal member
sealing member
cab
vertical side
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JP6696345B2 (en
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剛 野田
Takeshi Noda
剛 野田
裕希夫 平岡
Yukio Hiraoka
裕希夫 平岡
伊藤　卓
Taku Ito
卓 伊藤
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To enhance waterproof performance and dustproof performance between a seal member arranged at a window frame of a cab front face of a construction machine and a front window.SOLUTION: In a cab of a construction machine having an upper window and a lower window 45 which are vertically divided in a window frame 20 of a front face, a vertical side seal member 31 is arranged between the window frame 20 and the lower window 45, and a lateral intermediate seal member 34 is arranged between the upper window and the lower window 45. A sealing member 50 is arranged on a surface of the lower window 45 so as to fill a clearance formed in a lower part of a seal-overlapped part 36 in which the lateral intermediate seal member 34 is covered with the vertical side seal member 31.SELECTED DRAWING: Figure 7

Description

本発明は、例えば油圧ショベル、油圧クレーン等に用いられる建設機械のキャブに関する。   The present invention relates to a cab of a construction machine used for, for example, a hydraulic excavator, a hydraulic crane, or the like.

従来より、下部走行体と、下部走行体の上に旋回可能に搭載された上部旋回体と、上部旋回体の前部に俯仰動可能に設けられた作業装置とによって構成された油圧ショベル等の建設機械が知られている。このような建設機械には、通常、上部旋回体のアッパーフレーム上にオペレータが乗車する運転室としてのキャブが設けられ、キャブの前面側の窓枠に前窓が保持されている。   Conventionally, such as a hydraulic excavator configured by a lower traveling body, an upper swinging body that is turnably mounted on the lower traveling body, and a working device that can be raised and lowered at the front of the upper swinging body Construction machinery is known. Such a construction machine is usually provided with a cab as a driver's cab on which an operator gets on an upper frame of an upper swing body, and a front window is held in a window frame on the front side of the cab.

また、キャブにおいては、オペレータの視界を確保するために、例えば、前窓が上窓と下窓とに分割され、下窓が着脱可能に取り付けられるとともに上窓が開閉可能に取り付けられるものが知られている。そして、前窓と前窓を保持する窓枠との間、及び上窓と下窓との間からの水や埃等の侵入を防ぐために、前窓の左右両端部と窓枠との間に上下方向に延びる縦サイドシール部材を設け、上窓と下窓との間には、左右方向に延びて上窓及び下窓をそれぞれ前後方向から弾力的に挟む横中間シール部材を設けるといった工夫がなされている。   In order to ensure the operator's field of view, for example, the cab is divided into an upper window and a lower window, and the lower window is detachably attached and the upper window is detachably attached. It has been. In order to prevent water and dust from entering between the front window and the window frame holding the front window, and between the upper window and the lower window, between the left and right ends of the front window and the window frame. A vertical side seal member extending in the vertical direction is provided, and a lateral intermediate seal member extending in the left-right direction and elastically sandwiching the upper window and the lower window from the front-rear direction is provided between the upper window and the lower window. Has been made.

しかし、このような構造としたときに、前窓の左右両端部において、横中間シール部材に縦サイドシール部材が交差して重なる場合がある（以下、このように交差して重なる部分をシール重複部と称す）。そうすると、このシール重複部の近傍で、横中間シール部材の厚みによって、縦サイドシール部材を下窓の表面に沿わせにくい部分が生じ、この部分に隙間が生じて防水性や防塵性が不十分となる可能性がある。   However, in such a structure, the vertical side seal member may overlap and overlap the horizontal intermediate seal member at both the left and right end portions of the front window (hereinafter, the overlapping and overlapping portions are overlapped with the seal). Part). Then, in the vicinity of the seal overlapping portion, a portion where the vertical side seal member is difficult to follow the surface of the lower window is generated due to the thickness of the horizontal intermediate seal member, and a gap is formed in this portion, resulting in insufficient waterproofness and dustproofness. There is a possibility.

この対策として、例えば特許文献１では、上窓を閉窓位置にしたときに、縦サイドシール部材と横中間シール部材とが交差するコーナー部分に存するように、横中間シール部材の上部両側に略三角形の閉塞部材を一体的に形成して、シール重複部近傍の防水性及び防塵性を高めるようにしたものが開示されている。   As a countermeasure for this, for example, in Patent Document 1, when the upper window is set to the closed window position, the upper side of the horizontal intermediate seal member is substantially disposed on both sides of the upper portion so that the vertical side seal member and the horizontal intermediate seal member intersect each other. There is disclosed a structure in which a triangular blocking member is integrally formed to improve waterproofness and dustproofness in the vicinity of a seal overlap portion.

特開２００２−８８８１５号公報JP 2002-88815 A

しかし、特許文献１では、閉塞部材が縦サイドシール部材よりも幅方向内側に設けられているため、作業中の視界の妨げとなる虞がある。そのうえ、上窓の下端に取り付けられた横中間シール部材に閉塞部材が一体的に形成されており、上窓を開閉位置に動かすときに閉塞部材も一緒に動くこととなるため、開閉にともなって上窓が左右方向にずれたりすると、閉塞部材と縦サイドシール部材との間に隙間が生じて防水性や防塵性が確保できない虞がある。   However, in patent document 1, since the closing member is provided in the width direction inside rather than the vertical side seal member, there exists a possibility that it may obstruct the visual field during work. In addition, a closing member is integrally formed on the horizontal intermediate seal member attached to the lower end of the upper window, and when the upper window is moved to the opening / closing position, the closing member also moves together. If the upper window is displaced in the left-right direction, a gap is generated between the closing member and the vertical side seal member, and there is a possibility that waterproofness and dustproofness cannot be ensured.

本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、窓枠と前窓との間に縦サイドシール部材が設けられ、上窓と下窓の間に横中間シール部材が設けられた建設機械のキャブにおいて、作業中の視界を妨げることなく、縦サイドシール部材と横中間シール部材とが重なるシール重複部近傍に生じる隙間からの水や埃等の侵入を確実に防止することにある。   The present invention has been made in view of such points, and an object of the present invention is to provide a vertical side seal member between the window frame and the front window, and a horizontal intermediate seal between the upper window and the lower window. In the cab of a construction machine provided with a member, water and dust can be reliably intruded from a gap near the overlapping seal portion where the vertical side seal member and the horizontal intermediate seal member overlap without obstructing the view during work. It is to prevent.

上記の目的を達成するために、この発明では、シール重複部の上方及び下方の少なくとも一方における前窓の表面に封止部材を設けるようにした。   In order to achieve the above object, according to the present invention, a sealing member is provided on the surface of the front window in at least one of the upper and lower sides of the seal overlap portion.

具体的には、第１の発明では、摺動開閉可能な上窓と着脱可能な下窓とを有する前窓を備えた建設機械のキャブが前提である。そして、上記前窓を上記キャブに保持する窓枠と、上記窓枠と上記前窓の表面との間を上下方向に延び、弾性を有する縦サイドシール部材と、上記上窓と上記下窓との間を左右方向に延び、弾性を有する横中間シール部材と、上記前窓の幅方向両側において、上記横中間シール部材の前側に上記縦サイドシール部材が重なるシール重複部と、上記シール重複部の上方及び下方の少なくとも一方において、上記縦サイドシール部材と上記前窓の表面との間に生じる隙間に存するように該前窓の表面に設けられた封止部材と、を備え、上記上窓及び上記下窓のいずれか一方に上記横中間シール部材が設けられ、他方に上記封止部材が設けられている。   Specifically, the first invention is based on a cab for a construction machine including a front window having an upper window that can be slidably opened and closed and a lower window that can be attached and detached. A window frame that holds the front window in the cab; a vertical side seal member that extends in the vertical direction between the window frame and the surface of the front window and has elasticity; the upper window and the lower window; A horizontal intermediate seal member that extends in the left-right direction and has elasticity, a seal overlap portion in which the vertical side seal member overlaps the front side of the horizontal intermediate seal member on both sides in the width direction of the front window, and the seal overlap portion A sealing member provided on a surface of the front window so as to exist in a gap formed between the vertical side seal member and the surface of the front window on at least one of the upper side and the lower side of the upper window. And the said horizontal intermediate | middle sealing member is provided in either one of the said lower windows, and the said sealing member is provided in the other.

第２の発明では、第１の発明において、上記封止部材の幅は、上記縦サイドシール部材の幅よりも狭く設けられている。なお、ここでいう「縦サイドシール部材の幅」とは、前窓をキャブに取り付けた状態における、縦サイドシール部材が弾性変形した状態にあるときの縦サイドシール部材の幅を指すものとする。   In the second invention, in the first invention, the width of the sealing member is narrower than the width of the vertical side seal member. The “width of the vertical side seal member” here refers to the width of the vertical side seal member when the front side window is attached to the cab and the vertical side seal member is elastically deformed. .

第３の発明では、第１または第２の発明において、上記封止部材は、上下方向に平らに形成された平坦面と、上記平坦面の上端から後方かつ斜め上方に傾斜して上記封止部材の上端まで続く上部傾斜面と、上記平坦面の下端から後方かつ斜め下方に傾斜して上記封止部材の下端まで続く下部傾斜面と、を備えている。   According to a third invention, in the first or second invention, the sealing member includes a flat surface formed flat in the vertical direction, and the sealing member inclined obliquely upward and rearward from the upper end of the flat surface. An upper inclined surface extending to the upper end of the member, and a lower inclined surface inclined rearward and obliquely downward from the lower end of the flat surface to the lower end of the sealing member.

第４の発明では、第３の発明において、上記封止部材は上記下窓の表面に設けられ、上記封止部材の幅方向内側に上記上部傾斜面と、上記封止部材の幅方向外側に上記封止部材の上端まで続く上記平坦面と、上記平坦面と上記上部傾斜面とを連結して、前後方向に立設された連結壁部を備えている。   In 4th invention, in 3rd invention, the said sealing member is provided in the surface of the said lower window, the said upper inclined surface inside the width direction of the said sealing member, and the width direction outer side of the said sealing member The flat surface continuing to the upper end of the sealing member, the flat surface and the upper inclined surface are connected to each other, and a connecting wall portion standing in the front-rear direction is provided.

第１の発明によると、シール重複部の上方及び下方の少なくとも一方において、前窓の表面と縦サイドシール部材との間に生じる横中間シール部材の厚みによる隙間から、水や埃などがキャブ内に浸入することを確実に防止できる。   According to the first aspect of the present invention, at least one of the upper and lower portions of the seal overlap portion, water, dust, or the like is introduced into the cab from the gap due to the thickness of the horizontal intermediate seal member generated between the front window surface and the vertical side seal member. Can be surely prevented from entering.

第２の発明によると、封止部材の幅が、縦サイドシール部材の幅よりも狭いので、縦サイドシール部材によって封止部材の側部を覆うことができ、シール性が向上する。   According to the second invention, since the width of the sealing member is narrower than the width of the vertical side seal member, the side portion of the sealing member can be covered by the vertical side seal member, and the sealing performance is improved.

第３の発明によると、封止部材の平坦面と前窓の表面とが、上部傾斜面及び下部傾斜面で繋がっているので、縦サイドシール部材を沿わせやすく、防水性及び防塵性をさらに高めることができる。   According to the third invention, since the flat surface of the sealing member and the surface of the front window are connected by the upper inclined surface and the lower inclined surface, the vertical side seal member can be easily aligned, and further waterproof and dustproof. Can be increased.

第４の発明によると、封止部材の幅方向内側（下窓の幅方向内側）から水や埃が浸入しやすいところ、上部傾斜面により上下方向における縦サイドシール部材との密着性を高めることができるとともに、上部傾斜面と平坦面との間に前後方向に立設された連結壁部によって水や埃の侵入をせき止めることができ、防水性及び防塵性をさらに高めることができる。   According to the fourth aspect of the present invention, water and dust are likely to enter from the inner side in the width direction of the sealing member (the inner side in the width direction of the lower window), and the adhesion with the vertical side seal member in the vertical direction is enhanced by the upper inclined surface. In addition, water and dust can be prevented from entering by the connecting wall portion erected in the front-rear direction between the upper inclined surface and the flat surface, so that waterproofness and dustproofness can be further enhanced.

本発明の実施形態に係る建設機械の構成を示す概略側面図である。It is a schematic side view which shows the structure of the construction machine which concerns on embodiment of this invention. 本発明の実施形態に係る建設機械のキャブの斜視図である。It is a perspective view of the cab of the construction machine which concerns on embodiment of this invention. 本発明の実施形態に係る建設機械のキャブの正面図である。It is a front view of the cab of the construction machine which concerns on embodiment of this invention. 本発明の実施形態に係る建設機械のキャブの下窓の正面図である。It is a front view of the lower window of the cab of the construction machine which concerns on embodiment of this invention. 図３のＶ―Ｖ線端面拡大図である。It is the VV line end surface enlarged view of FIG. 図３ＶＩ―ＶＩ線断面拡大図である。FIG. 3 is an enlarged sectional view taken along line VI-VI. 図３のＶＩＩ―ＶＩＩ線断面拡大図である。It is the VII-VII line expanded sectional view of FIG. 図４の一点鎖線で囲んだ部分を示す下窓の斜視拡大図である。It is a perspective enlarged view of the lower window which shows the part enclosed with the dashed-dotted line of FIG. 図３における要部を、窓枠を省略して示す概略正面図である。It is a schematic front view which shows the principal part in FIG. 3 omitting a window frame.

以下、本発明の実施形態を図面に基づいて説明する。なお、以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。特に言及しない限り、図１に矢印で示した上下及び前後の方向に従って説明する。また、左右方向は、前方を向いて見た状態を基準とする。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. Unless otherwise stated, the description will be made according to the vertical and forward / backward directions indicated by arrows in FIG. Further, the left-right direction is based on the state viewed from the front.

（実施形態）
図１に示すように、建設機械としての油圧ショベル１０は、クローラ式の下部走行体１１と、下部走行体１１上に旋回自在に搭載された上部旋回体１２とを備えている。上部旋回体１２は、アッパーフレーム１８を備えている。 (Embodiment)
As shown in FIG. 1, a hydraulic excavator 10 as a construction machine includes a crawler type lower traveling body 11 and an upper revolving body 12 that is rotatably mounted on the lower traveling body 11. The upper swing body 12 includes an upper frame 18.

アタッチメント１３は、上部旋回体１２の前部に設置され、ブーム１３ａ、アーム１３ｂ、及びバケット１３ｃ等で構成されている。ブーム１３ａ、アーム１３ｂ、及びバケット１３ｃはそれぞれ、油圧制御された油圧シリンダ１３ｄの伸縮に連動して動作し、掘削等の作業を行う。これらブーム１３ａ等の操作は、アッパーフレーム１８上に設置されたキャブ１４において行われる。   The attachment 13 is installed in the front part of the upper turning body 12, and is configured by a boom 13a, an arm 13b, a bucket 13c, and the like. The boom 13a, the arm 13b, and the bucket 13c operate in conjunction with the expansion and contraction of the hydraulic cylinder 13d that is hydraulically controlled, and perform work such as excavation. The operations of the boom 13a and the like are performed on the cab 14 installed on the upper frame 18.

キャブ１４は、矩形箱形の運転室であり、アタッチメント１３に隣接して上部旋回体１２の左前部に設置されている。上部旋回体１２の後部には機械室１５が設けられている。機械室１５の内部には、エンジンや油圧ポンプ等（図示省略）が収容されている。機械室１５の周囲は、機械室カバー１６や前後のバランスを確保するためのカウンタウエイト１７で覆われている。   The cab 14 is a rectangular box-shaped cab, and is installed in the left front portion of the upper swing body 12 adjacent to the attachment 13. A machine room 15 is provided at the rear of the upper swing body 12. An engine, a hydraulic pump, and the like (not shown) are accommodated in the machine room 15. The periphery of the machine room 15 is covered with a machine room cover 16 and a counterweight 17 for securing the front and rear balance.

図２及び図３に示すように、キャブ１４の前面側に窓枠２０が設けられている。窓枠２０は、略矩形状からなり、窓枠２０内の前窓４０をキャブ１４に保持している。   As shown in FIGS. 2 and 3, a window frame 20 is provided on the front side of the cab 14. The window frame 20 has a substantially rectangular shape, and the front window 40 in the window frame 20 is held by the cab 14.

前窓４０は、窓枠２０の上部に配設されて上下に摺動開閉可能な略矩形状の上窓４１と、上窓４１の下方に配設されて窓枠２０に着脱可能に取り付けられた下窓４５とを有する。上窓４１は、下窓４５とともに窓枠２０内の開口を塞ぐ閉状態と、上方に摺動してキャブ１４の天井部に退避する開状態とに変位可能に設けられている。摺動開閉しない下窓４５は、キャブ１４の下部に設けられているため比較的土砂等が付着しやすく、必要に応じて取り外して作業視認性を高められるようになっている。   The front window 40 is disposed at the upper part of the window frame 20, and has a substantially rectangular upper window 41 that can be slid up and down. The front window 40 is disposed below the upper window 41 and is detachably attached to the window frame 20. And a lower window 45. The upper window 41 is provided so as to be displaceable between a closed state that closes the opening in the window frame 20 together with the lower window 45 and an open state that slides upward and retracts to the ceiling of the cab 14. The lower window 45 that is not slidably opened and closed is provided at the lower part of the cab 14, so that dirt and the like are relatively easily attached to the lower window 45, and can be removed as necessary to improve work visibility.

図４に示すように、下窓４５は、大略矩形状の下窓本体４６と、下窓本体４６の上部両側から幅方向外側に突出した突出部４７とを備える。突出部４７は下窓本体４６に一体に形成されている。なお、下窓４５においては、その前側（キャブ外側）面を表面、後側（キャブ内側）面を裏面と称す。   As shown in FIG. 4, the lower window 45 includes a substantially rectangular lower window body 46 and protruding portions 47 that protrude outward in the width direction from both upper sides of the lower window body 46. The protrusion 47 is formed integrally with the lower window body 46. In addition, in the lower window 45, the front side (cab outer side) surface is called the surface, and the rear side (cab inner side) surface is called the back surface.

図６、図７及び図９に示すように、窓枠２０に固定具６０が締結部材６７で取り付けられている。固定具６０は凹部６１を備え、この凹部６１に下窓４５の突出部４７が上方から挿入されて、下窓４５が窓枠２０に取り付けられている。なお、図９においては説明の便宜上、窓枠２０は省略して示す。   As shown in FIGS. 6, 7, and 9, a fixture 60 is attached to the window frame 20 with a fastening member 67. The fixing tool 60 includes a recess 61, and a protrusion 47 of the lower window 45 is inserted into the recess 61 from above, and the lower window 45 is attached to the window frame 20. In FIG. 9, the window frame 20 is omitted for convenience of explanation.

また、下窓４５の下部両隅は、円弧に形成されていて、下窓４５を窓枠２０に取り付ける時に、直角に形成された場合と比して取り付けやすくなっている。   Further, both lower corners of the lower window 45 are formed in circular arcs, and are easier to attach when the lower window 45 is attached to the window frame 20 than when formed at a right angle.

下窓４５の上側を除く周縁部には、裏面に黒色のセラミック層４８が帯状に被覆されている。これら周縁部は水等が伝って汚れやすい部分であるところ、このセラミック層４８によって汚れが目立たないようになっている。   A black ceramic layer 48 is coated on the back surface of the peripheral portion except the upper side of the lower window 45 in a band shape. These peripheral portions are portions that are easily contaminated by water or the like, but the ceramic layer 48 prevents the stains from being noticeable.

窓枠２０は、左右両側において各々上下方向に延びる縦サイド枠材２１と、縦サイド枠材２１の下端部同士を接続して左右方向に延びるアンダー枠材２３と、縦サイド枠材２１の上端部同士を接続して左右方向に延びるアッパー枠材２４とを有する。   The window frame 20 includes a vertical side frame member 21 that extends in the vertical direction on both the left and right sides, an under frame member 23 that extends in the horizontal direction by connecting lower ends of the vertical side frame members 21, and an upper end of the vertical side frame member 21. And an upper frame member 24 that connects the parts and extends in the left-right direction.

図３、図５〜図７に示すように、窓枠２０に沿って、窓枠２０における下窓４５の表面側（前面側）または裏面側（後面側）に相当する位置に、弾性を有するシール部材３０が設けられている。シール部材３０は、上窓４１及び下窓４５の左右側部においてそれぞれの表面に圧接する縦サイドシール部材３１と、下窓４５の下部において裏面に圧接するアンダーシール部材３３と、下窓４５の上端と上窓４１の下端との間に介在して両者に圧接する横中間シール部材３４とを有する。   As shown in FIGS. 3 and 5 to 7, along the window frame 20, the window frame 20 has elasticity at a position corresponding to the front side (front side) or the back side (rear side) of the lower window 45. A seal member 30 is provided. The seal member 30 includes a vertical side seal member 31 that presses against the respective surfaces of the upper and lower windows 41 and 45, an under seal member 33 that presses against the back surface of the lower window 45, and a lower window 45. A horizontal intermediate seal member 34 is interposed between the upper end and the lower end of the upper window 41 and press-contacts both.

左右の縦サイドシール部材３１は、各々縦サイド枠材２１に嵌められ、縦サイドシール部材３１の下端部は、アンダー枠材２３の一部に嵌められている。アンダーシール部材３３はアンダー枠材２３に嵌められている。各々縦サイドシール部材３１が下窓４５の左右側部の表面に押圧されて弾性変形し、かつアンダーシール部材３３が下窓４５の下部の裏面に押圧されて弾性変形した状態で固定具６０に挿入されて、下窓４５が窓枠２０に取り付けられている。   The left and right vertical side seal members 31 are each fitted to the vertical side frame member 21, and the lower end portion of the vertical side seal member 31 is fitted to a part of the under frame member 23. The under seal member 33 is fitted into the under frame member 23. The vertical side seal member 31 is pressed against the left and right side surfaces of the lower window 45 and elastically deformed, and the under seal member 33 is pressed against the lower surface of the lower window 45 and elastically deformed. The lower window 45 is attached to the window frame 20 by being inserted.

図５に示すように、アンダー枠材２３は、２段の階段状プレート２３ａを備えている。階段状プレート２３ａの下段に、下窓４５の下端を受けるブロック２９が設けられている。ブロック２９は、左右２か所に配置されていて、下窓４５の下端がブロック２９に当接して下端が位置決めされる。   As shown in FIG. 5, the under frame member 23 includes a two-step staircase plate 23 a. A block 29 for receiving the lower end of the lower window 45 is provided at the lower stage of the stepped plate 23a. The block 29 is arranged at two places on the left and right, and the lower end of the lower window 45 abuts against the block 29 so that the lower end is positioned.

横中間シール部材３４は、左右方向に延びるように上窓４１の下端に沿って設けられている。横中間シール部材３４は、上窓４１を前後方向から挟むように、上窓４１の下端に嵌められている。上窓４１を下げて閉位置にすると、横中間シール部材３４が下窓４５の上端縁に圧接し、下窓４５を前後方向から挟むように弾性変形して、上窓４１と下窓４５との隙間を密に塞ぐようになっている。このとき、図６、図７及び図９に示すように、前窓４０の幅方向（左右）両側で上窓４１と下窓４５との境界部分近傍では、縦サイドシール部材３１と横中間シール部材３４とが重なるシール重複部３６が形成されることとなる。具体的には、前窓４０の左右両側において、横中間シール部材３４のうち前窓４０の表面側にある部分のさらに前側に、縦サイドシール部材３１が交差して重なる。そうすると、このシール重複部３６近傍において、縦サイドシール部材３１と前窓４０の表面との間に、前窓４０の表面側にある横中間シール部材３４の厚みによって段差が生じて、この段差が隙間として形成される。すなわち、縦サイドシール部材３１は、横中間シール部材３４の前側面（表面）と前窓４０の表面とに跨がって延びているため、この段差によって、縦サイドシール部材３１が前窓４０に当接しにくい部分が生じ、その部分が隙間となる。   The horizontal intermediate seal member 34 is provided along the lower end of the upper window 41 so as to extend in the left-right direction. The horizontal intermediate seal member 34 is fitted to the lower end of the upper window 41 so as to sandwich the upper window 41 from the front-rear direction. When the upper window 41 is lowered to the closed position, the horizontal intermediate seal member 34 is pressed against the upper edge of the lower window 45 and is elastically deformed so as to sandwich the lower window 45 from the front and rear directions. It is designed to close the gap between the two. At this time, as shown in FIGS. 6, 7, and 9, in the vicinity of the boundary portion between the upper window 41 and the lower window 45 on both sides in the width direction (left and right) of the front window 40, the vertical side seal member 31 and the horizontal intermediate seal are provided. A seal overlap portion 36 that overlaps with the member 34 is formed. Specifically, on both the left and right sides of the front window 40, the vertical side seal member 31 intersects and overlaps the front side of the portion of the horizontal intermediate seal member 34 that is on the front side of the front window 40. Then, in the vicinity of the seal overlap portion 36, a step is generated between the vertical side seal member 31 and the surface of the front window 40 due to the thickness of the horizontal intermediate seal member 34 on the surface side of the front window 40. It is formed as a gap. That is, since the vertical side seal member 31 extends across the front side surface (front surface) of the horizontal intermediate seal member 34 and the surface of the front window 40, this step causes the vertical side seal member 31 to move to the front window 40. A portion that is difficult to come into contact with is formed, and this portion becomes a gap.

このとき、縦サイドシール部材３１と上窓４１の表面との間に生じる隙間に対しては、横中間シール部材３４の上部を上方に向けて滑らかに薄くなるように形成して上窓に取り付ける等の工夫を行うことで、隙間を極力低減できる。一方、図６に示すように、縦サイドシール部材３１と下窓４５の表面との間においては、横中間シール部材３４が下窓４５の上端縁に当接したときに、横中間シール部材３４の下部が下窓４５を前後方向から挟むように弾性変形して、下窓４５の表面側及び裏面側に膨出するので、縦サイドシール部材３１と上窓４１の表面との間の段差と比して段差が大きくなり、大きな隙間が生じることとなる。また、上窓４１と下窓４５とでくの字を描くように屈曲して位置付けられているので、この隙間をさらに大きくすることとなる。そこで、この隙間を埋めるように、下窓４５の表面に封止部材５０が貼り付けられている。   At this time, with respect to the gap generated between the vertical side seal member 31 and the surface of the upper window 41, the upper portion of the horizontal intermediate seal member 34 is formed so as to be smoothly thinned upward and attached to the upper window. The gap can be reduced as much as possible by devising. On the other hand, as shown in FIG. 6, between the vertical side seal member 31 and the surface of the lower window 45, when the horizontal intermediate seal member 34 abuts on the upper edge of the lower window 45, the horizontal intermediate seal member 34. Of the lower window 45 is elastically deformed so as to sandwich the lower window 45 in the front-rear direction, and bulges to the front surface side and the back surface side of the lower window 45. Compared with this, the step becomes larger and a large gap is generated. Further, since the upper window 41 and the lower window 45 are bent and positioned so as to draw a square shape, this gap is further increased. Therefore, the sealing member 50 is attached to the surface of the lower window 45 so as to fill this gap.

なお、縦サイドシール部材３１と上窓４１の表面との間に生じる隙間に対しては、隙間を低減することができればよいので、上記実施形態に限られない。例えば、横中間シール部材３４の上部を上方に向けて滑らかに薄くしなくとも、上窓４１の表面に封止部材５０を貼り付けてこの隙間を埋めてもよい。また、上記実施形態のように横中間シール部材３４の上部を薄くなるように形成した状態で、さらに上窓４１の表面に封止部材５０を貼り付けることで、隙間を極力低減するようにしてもよい。   Note that the gap formed between the vertical side seal member 31 and the surface of the upper window 41 is not limited to the above-described embodiment, as long as the gap can be reduced. For example, the sealing member 50 may be pasted on the surface of the upper window 41 to fill the gap without making the upper portion of the horizontal intermediate seal member 34 smooth and thin upward. Further, in the state where the upper part of the horizontal intermediate seal member 34 is formed to be thin as in the above embodiment, the sealing member 50 is further attached to the surface of the upper window 41 so that the gap is reduced as much as possible. Also good.

封止部材５０は、図８に示すように、略角錐台状であり、中央に凹部（図示省略）を備えたベース部材５１と、このベース部材５１の凹部に埋め込まれ、略直方体からなる封止本体部５２とを有する。封止本体部５２は、相対的に剛性の高い合成樹脂からなり、上下方向に平らに形成された平坦面５２ａを備える。   As shown in FIG. 8, the sealing member 50 has a substantially truncated pyramid shape, a base member 51 having a recess (not shown) in the center, and a seal made of a substantially rectangular parallelepiped embedded in the recess of the base member 51. And a stop main body 52. The sealing main body 52 is made of a synthetic resin having relatively high rigidity, and includes a flat surface 52a formed flat in the vertical direction.

ベース部材５１は、相対的に剛性の低い合成樹脂からなり、封止本体部５２の平坦面５２ａの上端から後方かつ斜め上方に傾斜して封止部材５０の上端まで続く上部傾斜面５１ａと、平坦面５２ａの下端から後方かつ斜め下方に傾斜して封止部材５０の下端まで続く下部傾斜面５１ｂと、平坦面５２ａの幅方向外側端部から後方かつ幅方向外側方向に傾斜して延びる外傾斜面５１ｃと、平坦面５２ａの幅方向内側端部から後方かつ幅方向内側方向に傾斜して延びる内傾斜面５１ｄとを備える。   The base member 51 is made of a synthetic resin having relatively low rigidity, and an upper inclined surface 51a that is inclined rearward and obliquely upward from the upper end of the flat surface 52a of the sealing body 52 to the upper end of the sealing member 50; A lower inclined surface 51b that is inclined rearward and obliquely downward from the lower end of the flat surface 52a to the lower end of the sealing member 50, and an outer surface that extends obliquely rearward and outward in the width direction from the widthwise outer end of the flat surface 52a. An inclined surface 51c, and an inner inclined surface 51d that extends rearward and inward in the width direction from the width direction inner end of the flat surface 52a.

上部傾斜面５１ａは、封止部材５０の幅方向内側端部から中間部分にかけて、封止部材５０の略半分の幅で設けられている。封止部材５０の中間部分（上部傾斜面５１ａの幅方向外側端部）から外傾斜面５１ｃの幅方向内側端部にかけて、平坦面５２ａが封止部材５０の上端まで延出して設けられている。この平坦面５２ａの延出した部分、すなわち上部傾斜面５１ａの下端の延長線上より上側に延びる部分を延出部５２ａ’と称す。   The upper inclined surface 51 a is provided with a width approximately half that of the sealing member 50 from the inner end in the width direction of the sealing member 50 to the intermediate portion. A flat surface 52a is provided to extend to the upper end of the sealing member 50 from an intermediate portion of the sealing member 50 (an outer end portion in the width direction of the upper inclined surface 51a) to an inner end portion in the width direction of the outer inclined surface 51c. . The extended portion of the flat surface 52a, that is, the portion extending above the extended line at the lower end of the upper inclined surface 51a is referred to as an extended portion 52a '.

平らに延びる平坦面５２ａの延出部５２ａ’と斜めに延びる上部傾斜面５１ａとの段差によって、両者を連結する三角形状の連結壁部５３が形成される。   Due to the step between the extending portion 52a 'of the flat surface 52a that extends flatly and the upper inclined surface 51a that extends diagonally, a triangular connecting wall portion 53 that connects the two is formed.

図６及び図７に示すように、上窓４１を閉位置にすると、上窓４１の下端に取り付けられた横中間シール部材３４が下窓４５の上端縁に圧接して、下窓４５を前後方向から挟むように弾性変形した状態となる。このとき、横中間シール部材３４と封止部材５０との関係は、横中間シール部材３４のうち下窓４５の表面側に位置する部分が、封止部材５０の上部傾斜面５１ａ、連結壁部５３、平坦面５２ａの延出部５２ａ’、及び幅方向外側傾斜面５１ｃに沿って弾性変形してそれぞれに当接するようになっている。   As shown in FIGS. 6 and 7, when the upper window 41 is in the closed position, the horizontal intermediate seal member 34 attached to the lower end of the upper window 41 is pressed against the upper edge of the lower window 45 to move the lower window 45 forward and backward. It will be in the state elastically deformed so that it may pinch | interpose from a direction. At this time, the relationship between the horizontal intermediate seal member 34 and the sealing member 50 is that the portion of the horizontal intermediate seal member 34 located on the surface side of the lower window 45 is the upper inclined surface 51a of the sealing member 50, the connecting wall portion. 53, elastically deformed along the extending portion 52a ′ of the flat surface 52a and the widthwise outer inclined surface 51c so as to come into contact with each other.

そして、図６、図７及び図９に示すように、縦サイドシール部材３１が弾性変形して中間シール部材３４、封止部材５０及び下窓４５のそれぞれ表面（前側面）に圧接した状態となっている。このとき、封止部材５０の平坦面５２ａと下窓４５の表面とが上部傾斜面５１ａ及び下部傾斜面５１ｂでなだらかに繋がっているため、封止部材５０と下窓４５とに跨って被さるように上下方向に延びる縦サイドシール部材３１をそれぞれに当接させやすくなっている。また、封止部材５０の幅方向外側及び内側に形成された外傾斜面５１ｃ及び内傾斜面５１ｄが設けられていることで、縦サイドシール部材３１を幅方向に当接させやすくなっている。このように平坦面５２ａの周りに上部、下部、幅方向外側、及び幅方向内側傾斜面５１ａ〜５１ｄを設けることで、封止部材５０及び下窓４５の表面への縦サイドシール部材３１の密着性を高められるようになっている。   As shown in FIGS. 6, 7, and 9, the longitudinal side seal member 31 is elastically deformed and is in pressure contact with the respective surfaces (front side surfaces) of the intermediate seal member 34, the sealing member 50, and the lower window 45. It has become. At this time, since the flat surface 52a of the sealing member 50 and the surface of the lower window 45 are smoothly connected by the upper inclined surface 51a and the lower inclined surface 51b, the sealing member 50 covers the sealing member 50 and the lower window 45. The vertical side seal members 31 extending in the vertical direction are easily brought into contact with each other. Further, since the outer inclined surface 51c and the inner inclined surface 51d formed on the outer side and the inner side in the width direction of the sealing member 50 are provided, the vertical side seal member 31 is easily brought into contact with the width direction. As described above, the upper side, the lower side, the width direction outer side, and the width direction inner side inclined surfaces 51a to 51d are provided around the flat surface 52a, whereby the vertical side seal member 31 adheres to the surfaces of the sealing member 50 and the lower window 45. It has become possible to enhance the sex.

また、連結壁部５３は、上部傾斜面５１ａと平坦面５２ａの延出部５２ａ’を連結するように前後方向に延びて設けられている。シール重複部３６に近い封止部材５０の上部においては、相対的に大きな隙間が生じるので、特に水や埃等の侵入が懸念されるところ、仮に下窓４５の幅方向内側から水や埃等が侵入した場合であっても、封止部材５０の幅方向中間位置に設けられたこの連結壁部５３でせき止めることができ、防水性及び防塵性をさらに高めることができる。また、縦サイドシール部材３１の幅方向中心に相当する位置に連結壁部５３が設けられているため、縦サイドシール部材３１の幅方向側部近傍に相当する位置に設けられている場合に比して、縦サイドシール部材３１が弾性変形しやすく、連結壁部５３に当接させやすくなっている。   Further, the connecting wall portion 53 is provided to extend in the front-rear direction so as to connect the upper inclined surface 51a and the extending portion 52a 'of the flat surface 52a. In the upper part of the sealing member 50 close to the seal overlap portion 36, a relatively large gap is generated. Therefore, there is a concern that water or dust or the like may enter in particular. Even if it penetrates, it can be blocked by the connecting wall portion 53 provided at the intermediate position in the width direction of the sealing member 50, and the waterproofness and dustproofness can be further enhanced. Further, since the connecting wall portion 53 is provided at a position corresponding to the center in the width direction of the vertical side seal member 31, compared with a case where it is provided at a position corresponding to the vicinity of the side portion in the width direction of the vertical side seal member 31. Thus, the vertical side seal member 31 is easily elastically deformed and easily brought into contact with the connecting wall portion 53.

また、封止部材５０の幅に対して、弾性変形した縦サイドシール部材３１の幅は広くなっており、封止部材５０が縦サイドシール部材３１で覆われるようになっている。このため、下窓４５の外観視で、封止部材５０が縦サイドシール部材３１に隠れるので、下窓４５における視界領域を妨げることがない。   The width of the longitudinal side seal member 31 that is elastically deformed is wider than the width of the sealing member 50, and the sealing member 50 is covered with the longitudinal side seal member 31. For this reason, since the sealing member 50 is hidden behind the vertical side seal member 31 in the external view of the lower window 45, the visual field area in the lower window 45 is not hindered.

このように、横中間シール部材３４に縦サイドシール部材３１が被さるシール重複部３６の下方において、横中間シール部材３４の厚みによって下窓４５の表面との間に生じる隙間を埋めるように、下窓４５に封止部材５０が設けられているので、キャブ１４内への水や埃等の侵入を確実に防ぐことができる。さらに、封止部材５０の幅は、下窓４５がキャブ１４に取り付けられた状態において、縦サイドシール部材３１の幅よりも狭くなっているので、封止部材５０が下窓４５の視界領域に露出することなく、防水性及び防塵性を高めることができる。   In this way, below the seal overlap portion 36 where the vertical side seal member 31 covers the horizontal intermediate seal member 34, the lower intermediate wall 34 is filled with a gap formed between the surface of the lower window 45 due to the thickness of the horizontal intermediate seal member 34. Since the sealing member 50 is provided in the window 45, entry of water, dust, or the like into the cab 14 can be reliably prevented. Further, since the width of the sealing member 50 is narrower than the width of the vertical side seal member 31 in a state where the lower window 45 is attached to the cab 14, the sealing member 50 is in the view area of the lower window 45. Waterproofness and dustproofness can be enhanced without exposure.

また、封止部材５０に上部、下部、幅方向外側、及び幅方向内側傾斜面５１ａ〜５１ｄを設けることで縦サイドシール部材３１との密着性を高めることができる。さらに、封止部材５０の上部に連結壁部５３を設けることで水や埃等の侵入をせき止めることができる。   Further, by providing the sealing member 50 with an upper portion, a lower portion, a width direction outer side, and a width direction inner side inclined surfaces 51 a to 51 d, the adhesion with the vertical side seal member 31 can be enhanced. Further, by providing the connecting wall portion 53 on the upper portion of the sealing member 50, entry of water, dust or the like can be prevented.

また、特に本実施形態において、封止部材５０は摺動開閉する上窓４１ではなく摺動開閉しない下窓４５に設けられているため、下窓４５からはがれにくく、かつ摩擦による劣化を防止することができる。   In particular, in the present embodiment, the sealing member 50 is provided on the lower window 45 that does not slide open / close instead of the upper window 41 that slides open / close. Therefore, the sealing member 50 is difficult to peel off from the lower window 45 and prevents deterioration due to friction. be able to.

（その他の実施形態）
封止部材５０は、縦サイドシール部材３１及び横中間シール部材３４の近傍に生じる隙間を埋めることで、水や埃等がキャブ１４内に浸入することを防止できればよいものであり、上記実施形態の構造に限られるものではない。例えば、平坦面５２ａや傾斜面５１ａ〜５１ｄは、僅かに曲面となっていてもよい。また、ベース部材５１と封止本体部５２とを同じ材質で一体に設けてもよい。 (Other embodiments)
The sealing member 50 only needs to prevent water and dust from entering the cab 14 by filling a gap generated in the vicinity of the vertical side seal member 31 and the horizontal intermediate seal member 34. It is not limited to the structure. For example, the flat surface 52a and the inclined surfaces 51a to 51d may be slightly curved. In addition, the base member 51 and the sealing main body 52 may be integrally provided with the same material.

また、上記実施形態では、平坦面５２ａの一部を同じ高さで延ばして延出部５２ａ’としているが、上部傾斜面５１ａとの間に連結壁部５３が形成されればよいものであり、必ずしも平坦面５２ａと同じ高さで延ばす必要はない。   Moreover, in the said embodiment, although a part of flat surface 52a is extended by the same height and it is set as extension part 52a ', the connection wall part 53 should just be formed between upper inclined surfaces 51a. It is not always necessary to extend the same height as the flat surface 52a.

また、上記実施形態では、下窓４５の表面側に縦サイドシール部材３１が当接しているが、これに限られるものではなく、下窓４５を前後方向から挟む縦サイドシール部材を用いてもよい。   Moreover, in the said embodiment, although the vertical side seal member 31 is contact | abutting to the surface side of the lower window 45, it is not restricted to this, Even if it uses the vertical side seal member which pinches | interposes the lower window 45 from the front-back direction. Good.

また、上記実施形態では、封止部材５０を下窓４５の突出部４７に跨がって設けたが、突出部４７を有しない下窓４５にも適用可能である。また、下窓４５は窓枠２０に着脱可能に組み付けるのでなく、固定されていてもよい。   Moreover, in the said embodiment, although the sealing member 50 was provided ranging over the protrusion part 47 of the lower window 45, it is applicable also to the lower window 45 which does not have the protrusion part 47. FIG. Further, the lower window 45 may be fixed to the window frame 20 instead of being detachably attached.

また、上記実施形態では、建設機械を油圧ショベルとしたが、これに限られるものではなく、例えば、油圧クレーンやラフテレーンクレーンや杭打ち機等、摺動開閉可能な上窓と着脱可能な下窓４５とを前側に備えたキャブ１４を有するものであれば、特に限定されない。   In the above-described embodiment, the construction machine is a hydraulic excavator. However, the construction machine is not limited to this. If it has the cab 14 provided with the window 45 in the front side, it will not specifically limit.

１０ 油圧ショベル（建設機械）
１１ 下部走行体
１２ 上部旋回体
１４ キャブ
２０ 窓枠
２１ 縦サイド枠材
３０ シール部材
３１ 縦サイドシール部材
３４ 横中間シール部材
３６ シール重複部
４０ 前窓
４１ 上窓
４５ 下窓
５０ 封止部材
５１ ベース部材
５１ａ 上部傾斜面
５１ｂ 下部傾斜面
５１ｃ 外側傾斜面
５１ｄ 内側傾斜面
５２ 封止本体部
５２ａ 平坦面
５２ａ’ 延出部
５３ 連結壁部
６０ 固定具 10 Hydraulic excavator (Construction machinery)
DESCRIPTION OF SYMBOLS 11 Lower traveling body 12 Upper revolving body 14 Cab 20 Window frame 21 Vertical side frame material 30 Seal member 31 Vertical side seal member 34 Horizontal intermediate seal member 36 Seal overlap part 40 Front window 41 Upper window 45 Lower window 50 Sealing member 51 Base Member 51a Upper inclined surface 51b Lower inclined surface 51c Outer inclined surface 51d Inner inclined surface 52 Sealing main body portion 52a Flat surface 52a 'Extension portion 53 Connecting wall portion 60 Fixing tool

Claims (4)

摺動開閉可能な上窓と着脱可能な下窓とを有する前窓を備えた建設機械のキャブであって、
上記前窓を上記キャブに保持する窓枠と、
上記窓枠と上記前窓の表面との間を上下方向に延び、弾性を有する縦サイドシール部材と、
上記上窓と上記下窓との間を左右方向に延び、弾性を有する横中間シール部材と、
上記前窓の幅方向両側において、上記横中間シール部材の前側に上記縦サイドシール部材が重なるシール重複部と、
上記シール重複部の上方及び下方の少なくとも一方において、上記縦サイドシール部材と上記前窓の表面との間に生じる隙間に存するように該前窓の表面に設けられた封止部材と、を備え、
上記上窓及び上記下窓のいずれか一方に上記横中間シール部材が設けられ、他方に上記封止部材が設けられていることを特徴とする建設機械のキャブ。 A cab of a construction machine having a front window having an upper window that can be slidably opened and closed and a lower window that is detachable,
A window frame for holding the front window in the cab;
A vertical side seal member extending in the vertical direction between the window frame and the surface of the front window, and having elasticity,
A horizontal intermediate seal member extending in the left-right direction between the upper window and the lower window and having elasticity;
On both sides in the width direction of the front window, a seal overlap portion where the vertical side seal member overlaps the front side of the horizontal intermediate seal member;
A sealing member provided on the surface of the front window so as to be present in a gap formed between the vertical side seal member and the surface of the front window, at least above and below the seal overlap portion. ,
A construction machine cab, wherein the horizontal intermediate sealing member is provided on one of the upper window and the lower window, and the sealing member is provided on the other. 請求項１において、
上記封止部材の幅は、上記縦サイドシール部材の幅よりも狭く設けられていることを特徴とする建設機械のキャブ。 In claim 1,
A cab for a construction machine, wherein the sealing member has a width narrower than that of the vertical side seal member. 請求項１または２において、
上記封止部材は、
上下方向に平らに形成された平坦面と、
上記平坦面の上端から後方かつ斜め上方に傾斜して上記封止部材の上端まで続く上部傾斜面と、
上記平坦面の下端から後方かつ斜め下方に傾斜して上記封止部材の下端まで続く下部傾斜面と、を備えることを特徴とする建設機械のキャブ。 In claim 1 or 2,
The sealing member is
A flat surface formed flat in the vertical direction;
An upper inclined surface that is inclined rearward and obliquely upward from the upper end of the flat surface to the upper end of the sealing member;
A cab for a construction machine, comprising: a lower inclined surface that is inclined rearward and obliquely downward from a lower end of the flat surface to a lower end of the sealing member. 請求項３において、
上記封止部材は上記下窓の表面に設けられ、
上記封止部材の幅方向内側に上記上部傾斜面と、
上記封止部材の幅方向外側に上記封止部材の上端まで続く上記平坦面と、
上記平坦面と上記上部傾斜面とを連結して、前後方向に立設された連結壁部を備えることを特徴とする建設機械のキャブ。 In claim 3,
The sealing member is provided on the surface of the lower window,
The upper inclined surface on the inner side in the width direction of the sealing member,
The flat surface that continues to the upper end of the sealing member on the outer side in the width direction of the sealing member;
A cab for a construction machine, comprising a connecting wall portion erected in the front-rear direction by connecting the flat surface and the upper inclined surface.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102053306B1 (en) * 2018-06-05 2019-12-09 현대건설기계 주식회사 Cabin and working machine having the cabin
JP2020026627A (en) * 2018-08-09 2020-02-20 コベルコ建機株式会社 Cab of construction machine
JP2020029704A (en) * 2018-08-22 2020-02-27 コベルコ建機株式会社 Cab for construction machine

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS58210220A (en) * 1982-06-01 1983-12-07 Ninomiya Sangyo Kk Cab structure of shovel excavator machine
JPH0676592U (en) * 1992-07-17 1994-10-28 住友建機株式会社 Operator cab open / close window seal structure
JPH11159260A (en) * 1997-12-01 1999-06-15 Press Kogyo Co Ltd Seal structure for operator's cab opening/closing window
JP2002088815A (en) * 2000-09-19 2002-03-27 Hitachi Constr Mach Co Ltd Cab for construction machinery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58210220A (en) * 1982-06-01 1983-12-07 Ninomiya Sangyo Kk Cab structure of shovel excavator machine
JPH0676592U (en) * 1992-07-17 1994-10-28 住友建機株式会社 Operator cab open / close window seal structure
JPH11159260A (en) * 1997-12-01 1999-06-15 Press Kogyo Co Ltd Seal structure for operator's cab opening/closing window
JP2002088815A (en) * 2000-09-19 2002-03-27 Hitachi Constr Mach Co Ltd Cab for construction machinery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102053306B1 (en) * 2018-06-05 2019-12-09 현대건설기계 주식회사 Cabin and working machine having the cabin
JP2020026627A (en) * 2018-08-09 2020-02-20 コベルコ建機株式会社 Cab of construction machine
JP7063182B2 (en) 2018-08-09 2022-05-09 コベルコ建機株式会社 Construction machinery cab
JP2020029704A (en) * 2018-08-22 2020-02-27 コベルコ建機株式会社 Cab for construction machine
JP7067364B2 (en) 2018-08-22 2022-05-16 コベルコ建機株式会社 Construction machinery cab

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