JP4867651B2 - Cabin head guard device for construction machinery - Google Patents

Cabin head guard device for construction machinery Download PDF

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JP4867651B2
JP4867651B2 JP2006352374A JP2006352374A JP4867651B2 JP 4867651 B2 JP4867651 B2 JP 4867651B2 JP 2006352374 A JP2006352374 A JP 2006352374A JP 2006352374 A JP2006352374 A JP 2006352374A JP 4867651 B2 JP4867651 B2 JP 4867651B2
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guard
cabin
roof
end portion
construction machine
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JP2008163595A (en
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賢太 小島
秀樹 大久保
明子 池田
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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Description

本発明は油圧ショベル等の建設機械において、キャビンのルーフを落石等から保護するためのキャビンヘッドガード装置に関するものである。   The present invention relates to a cabin head guard device for protecting a cabin roof from falling rocks or the like in a construction machine such as a hydraulic excavator.

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７に示すようにクローラ式の下部走行体１と、この下部走行体１上に縦軸まわりに旋回自在に搭載された上部旋回体２と、この上部旋回体２の前部に装着された作業アタッチメント３とによって構成される。   As shown in FIG. 7, the hydraulic excavator includes a crawler-type lower traveling body 1, an upper revolving body 2 that is mounted on the lower traveling body 1 so as to be rotatable about a vertical axis, and a front portion of the upper revolving body 2. And the work attachment 3 attached to the.

上部旋回体２にはキャビン（運転室）４が設けられ、このキャビン４内で旋回、走行、アタッチメント作動の各操作が行われる。   The upper swing body 2 is provided with a cabin (operator's cab) 4, and each operation of turning, running, and attachment operation is performed in the cabin 4.

図８に示すようにキャビン４のルーフ４ａには上方視界を確保するための天窓５が前部に設けられ、この天窓５を含めてルーフ４ａを落下物から保護するためのキャビンヘッドガード装置６がルーフ上方に取付けられている。   As shown in FIG. 8, the roof 4a of the cabin 4 is provided with a skylight 5 at the front for securing an upper field of view, and the cabin head guard device 6 for protecting the roof 4a including the skylight 5 from falling objects. Is mounted above the roof.

このキャビンヘッドガード装置（以下、単にヘッドガード装置という）６は、図７,８
に示す例ではルーフ全面を覆う状態でルーフ４ａ上に取付けられる。なお、同装置６の天窓５を覆う前部は格子状に形成されている。 This cabin head guard device (hereinafter simply referred to as a head guard device) 6 is shown in FIGS.
In the example shown in FIG. 2, the roof 4a is mounted on the roof 4a so as to cover the entire roof surface. In addition, the front part which covers the skylight 5 of the device 6 is formed in a lattice shape.

このような全面防護型かつ固定型のヘッドガード装置６は特許文献１に示されている。   Such a full-protection type and fixed type head guard device 6 is disclosed in Patent Document 1.

一方、図９に示すように、天窓５を含むルーフ前部のみを覆うヘッドガード装置７も公知である。   On the other hand, as shown in FIG. 9, a head guard device 7 that covers only the front portion of the roof including the skylight 5 is also known.

このヘッドガード装置７は、全体が格子状に形成され、天窓５の清掃時にたとえば図示のように後上がりに開くようにルーフ４ａ上に枢着されている。図９中、８はこのヘッドガード装置７を開き状態に保持するためのステーである。   The head guard device 7 is formed in a lattice shape as a whole, and is pivotally mounted on the roof 4a so as to open rearward as shown in the figure when the skylight 5 is cleaned. In FIG. 9, 8 is a stay for holding the head guard device 7 in an open state.

このような前部防護型かつ開閉式のヘッドガード装置７は特許文献２に示されている。   Such a front protective and openable head guard device 7 is disclosed in Patent Document 2.

さらに、特許文献３に示されているように、全面防護型のヘッドガード装置をルーフ上で前後方向にスライド自在に支持し、機械輸送時に制限高さを遵守するために前方低位置にスライドさせる構成のものも公知である。
実開昭４−５３８５５号公報 特開平８−１０９６５８号公報 特開２００６−１７７１１７号公報 Further, as shown in Patent Document 3, a fully guarded head guard device is slidably supported in the front-rear direction on the roof, and is slid to a lower front position in order to comply with the restricted height during machine transportation. Structures are also known.
Japanese Utility Model Publication No. 4-53855 JP-A-8-109658 JP 2006-177117 A

図７,８（特許文献１）に示す全面防護型かつ固定型のヘッドガード装置６によると、
天窓５だけでなくルーフ全面を保護できるため、高いキャビン保護効果が得られる。その反面、天窓５の清掃時にヘッドガード装置６全体を取外さなければならず、この作業が面倒となる。 According to the fully protective and fixed head guard device 6 shown in FIGS. 7 and 8 (Patent Document 1),
Since not only the skylight 5 but also the entire roof surface can be protected, a high cabin protection effect can be obtained. On the other hand, it is necessary to remove the entire head guard device 6 when cleaning the skylight 5, and this work becomes troublesome.

一方、特許文献３に示された全面防護型かつ前後スライド型のヘッドガード装置によると、天窓５の清掃は簡単になるが、装置全体をスライドさせるため、レール等の支持構造が大がかりかつ複雑となり、コストの面で不利となるとともに、開閉操作も面倒となる。   On the other hand, according to the full guard type and front / rear slide type head guard device disclosed in Patent Document 3, the cleaning of the skylight 5 is simplified, but since the entire device is slid, the support structure such as a rail becomes large and complicated. This is disadvantageous in terms of cost, and the opening / closing operation is also troublesome.

これに対し、図９（特許文献２）に示す前部防護型かつ開閉式のヘッドガード装置７によると、天窓５の清掃が簡単で支持構造も簡単ですむ反面、ルーフ後部は落下物から防護できないためキャビン保護効果の点で不十分となっていた。   On the other hand, according to the front guard type and openable head guard device 7 shown in FIG. 9 (Patent Document 2), the skylight 5 is easy to clean and the support structure is simple, but the roof rear part is protected from falling objects. Because it was not possible, it was insufficient in terms of cabin protection effect.

そこで本発明は、全面防護型と開閉型の長所のみを生かし、ルーフ全面を防護して高いキャビン保護効果を得ることができるとともに、天窓の清掃が容易でしかも支持構造が簡単ですむ建設機械のキャビンヘッドガード装置を提供するものである。   Therefore, the present invention makes use of only the advantages of the full-protection type and the open / close type to protect the entire roof surface and obtain a high cabin protection effect, as well as a construction machine that can easily clean the skylight and has a simple support structure. A cabin head guard device is provided.

請求項１の発明は、キャビンのルーフ後部を上から覆って防護する後ガードと、天窓を含むルーフ前部を上から覆って防護する前ガードとから成り、この前ガードは、前端部がヒンジ部材によりルーフに枢着されて開閉し、閉じ状態で後端部が後ガードに着脱可能に連結されるように構成されたものである。 The invention according to claim 1, the guard after the protecting covering from above the roof rear portion of the cabin comprises a roof front including skylights and a guard before protection covering from the top, the front guard, front end hinge opening and closing is pivotally mounted on the roof of a member, in which the rear end portion in the closed state is constructed so that is detachably coupled to the rear guard.

請求項２の発明は、請求項１の構成において、前ガードの後端部が後ガードの前端部上面に載置支持された状態で着脱可能に連結されるように構成されたものである。 The invention of claim 2 is one in which the structure of claim 1, configured prior to the rear end of the guard is worn detachably coupled in a state of being placed supported on the front end portion upper surface of the rear guard .

請求項３の発明は、請求項２の構成において、後ガードは前端部を含む前後複数個所でルーフに取付けられ、前ガード後端部が、この後ガードの前端部とその直後部の対ルーフ取付点間で後ガードに連結されるように構成されたものである。 According to a third aspect of the present invention, in the configuration of the second aspect, the rear guard is attached to the roof at a plurality of front and rear positions including the front end portion, and the rear end portion of the front guard corresponds to the front end portion of the rear guard and the roof immediately behind the rear guard portion. It is comprised so that it may be connected with a rear guard between attachment points .

請求項４の発明は、請求項３の構成において、前ガード後端部が、後ガード前端部の対ルーフ取付点と同じ前後方向位置で後ガード前端部に連結されるように構成されたものである。 According to a fourth aspect of the present invention, in the configuration of the third aspect, the rear end portion of the front guard is connected to the front end portion of the rear guard at the same front-rear direction position as the anti-roof mounting point of the front end portion of the rear guard. It is.

請求項５の発明は、請求項１乃至４のいずれかの構成において、天窓を拭くワイパーが、上方から前ガードで覆われる状態で前ガード後端部または後ガード前端部に取付けられたものである。 Those invention of claim 5, in the construction of claims 1 to 4, a wiper to wipe the skylight, mounted et been before the guard rear end or rear guard front end in a state covered with front guard from above It is.

請求項６の発明は、請求項５の構成において、前ガードが後ガードよりも高い位置で後ガードに連結されることにより、前ガードの下方にワイパー収容空間が形成され、ワイパーがこのワイパー収容空間で前ガード後端部または後ガード前端部に取付けられたものである。 According to a sixth aspect of the present invention, in the configuration of the fifth aspect , the front guard is connected to the rear guard at a position higher than the rear guard, whereby a wiper housing space is formed below the front guard. It is attached to the front guard rear end or the rear guard front end in space .

請求項７の発明は、請求項１乃至６のいずれかの構成において、前ガードを緩やかに開くダンパーが、前ガードと後ガードとの間に取付けられたものである。 A seventh aspect of the present invention is the construction according to any one of the first to sixth aspects , wherein the damper that gently opens the front guard is attached between the front guard and the rear guard .

請求項８の発明は、請求項７の構成において、ダンパーは、後ガードに対する取付点を支点として回動し、ガード使用時には一端が前ガード下面に着脱可能に取付けられ、ガード分解時にはこの使用時姿勢から後向きに反転して一端が後ガード上面に取付けられるように構成されたものである。 According to an eighth aspect of the present invention, in the configuration of the seventh aspect , the damper rotates with the attachment point with respect to the rear guard as a fulcrum, and one end is detachably attached to the lower surface of the front guard when the guard is used. It is configured so that one end can be attached to the upper surface of the rear guard by turning backward from the posture .

請求項９の発明は、請求項８の構成において、ダンパーの一端が、ガード使用時には前ガードに、ガード分解時には後ガードにそれぞれ共通のブラケットによって取付けられるように構成されたものである。 The invention of claim 9, in the configuration of claim 8, one end of the damper, the guard before the time guard used, at the time of the guard degradation are those that are configured to be attached taken by each rear guard common bracket.

本発明によると、ルーフ後部を覆う後ガードと、天窓を含めたルーフ前部を覆う前ガードとによってルーフ全面を防護する構成をとりながら、前ガードを開閉式に構成したから、全面防護型及び開閉型双方の長所のみを生かすことができる。   According to the present invention, the front guard is configured to be openable while the rear guard covering the roof rear part and the front guard covering the roof front part including the skylight are protected by the front guard. Only the advantages of both open and close types can be utilized.

すなわち、ルーフ全面を防護できるため、高いキャビン保護効果を得ることができる一方で、前ガードが開閉するため天窓の清掃が容易となる。しかも、前ガードは、前端側を支点に回動して開閉するため、たとえばスライド構造と比較して支持構造が簡単でコストが安くてすむとともに、開閉操作も容易となる。 That is, since the entire roof surface can be protected, a high cabin protection effect can be obtained, while the front guard opens and closes, so that the skylight can be easily cleaned. In addition, since the front guard pivots with the front end side as a fulcrum and opens and closes, for example, the support structure is simpler and less expensive than the slide structure, and the opening and closing operation is facilitated.

この場合、前ガードを、前端側を支点として開閉し、閉じ状態で後端部が後ガードに連結される構成、すなわち、落下物が当たる可能性が高いヘッドガード装置中間部で前後両ガードを連結する構成としたから、両ガードが切り離された状態で別々に荷重を支持する構成と比較して、荷重を両ガードで分担することで両ガードそのものの荷重支持力を高めることができる。また、キャビンルーフにかかる荷重を両ガードを通じて広く分散できるため、ルーフ防護効果の点で有利となる。 In this case , the front guard is opened and closed with the front end side as a fulcrum, and the rear end is connected to the rear guard in the closed state, i.e., the front and rear guards at the middle part of the head guard device where there is a high possibility of falling objects. Since it is the structure connected, compared with the structure which supports a load separately in a state where both guards are separated, the load supporting force of both guards can be increased by sharing the load with both guards. In addition, the load applied to the cabin roof can be widely dispersed through both guards, which is advantageous in terms of roof protection effect.

この点は、とくに請求項２〜４の発明のように前ガードの後端部を後ガードの前端部上面に載置支持された状態で連結することによって顕著となる。 This point becomes conspicuous particularly when the rear end portion of the front guard is connected and mounted on the upper surface of the front end portion of the rear guard as in the inventions of claims 2 to 4 .

とりわけ、請求項３の発明のように前ガード後端部を、後ガード前端部とその直後部の対ルーフ取付点間で後ガード前端部に取付けること、なかでも請求項４の発明のように後ガード前端部の対ルーフ取付点と同じ前後方向位置で後ガード前端部に取付けることにより、ヘッドガード装置全体としてきわめて高い耐荷重性能を得ることができる。 Especially, the front guard rear portion as in the invention of claim 3, be attached to the rear guard front end portion between the rear guard front end and the pair roof attachment point of the immediately portions, among others as in the invention of claim 4 By attaching to the front end of the rear guard at the same position in the front-rear direction as the attachment point of the front end of the rear guard to the roof, it is possible to obtain extremely high load resistance performance as a whole of the head guard device.

また、請求項５,６の発明によると、天窓を拭くワイパーを、上方から前ガードで覆われる状態で前ガード後端部または後ガード前端部に取付けたから、ワイパーを落下物から保護しながら天窓のワイパー効果によって良好な上方視界を確保することができる。 According to the inventions of claims 5 and 6 , since the wiper for wiping the skylight is attached to the rear end of the front guard or the front end of the rear guard while being covered with the front guard from above, the skylight can be protected while protecting the wiper from falling objects. A good upper field of view can be secured by the wiper effect.

この場合、請求項６の発明によると、前ガードを後ガードよりも高い位置で後ガード前端部に連結することにより、前ガード下方にワイパー収容空間を形成し、ワイパーをこのワイパー収容空間で前ガード後端部または後ガード前端部に取付けたから、たとえばキャビンのルーフを部分的に凹ませてワイパー収容空間を形成する場合や、両ガードをともに高位置に設けることによってワイパー収容空間を確保する場合と比較して、ワイパー収容空間を簡単な構成で無理なく、低コストで形成することができる。 In this case, according to the invention of claim 6 , the front guard is connected to the front end of the rear guard at a position higher than the rear guard, thereby forming a wiper housing space below the front guard, and the wiper is moved forward in the wiper housing space. Since it is attached to the rear end of the guard or the front end of the rear guard, for example, when the roof of the cabin is partially recessed to form a wiper accommodation space, or when both guards are provided at a high position to secure the wiper accommodation space Compared to the above, it is possible to form the wiper housing space with a simple configuration without difficulty and at a low cost.

また、前ガードが高位置にあることで前ガードと天窓の間隔が広がるため、落下物を受けて前ガードが凹んだ場合でも天窓の破損を防止できる利点がある。   Moreover, since the space | interval of a front guard and a skylight spreads because a front guard is in a high position, even when a front guard receives a fallen object and a front guard is dented, there exists an advantage which can prevent a skylight from being damaged.

一方、請求項７〜９の発明によると、前ガードを緩やかに開くダンパーを前後両ガード間に取付けたから、前ガードを安全に、かつより簡単に開閉することができる。 On the other hand, according to the inventions of claims 7 to 9, since the damper that gently opens the front guard is attached between the front and rear guards, the front guard can be opened and closed safely and more easily.

この場合、請求項８の発明によると、ガード分解時にダンパーを反転させ、その一端（使用時の前端、ガード分解時の後端）を後ガードに取付けて固定する構成としたから、輸送時にダンパーが動揺するおそれがない。 In this case, according to the eighth aspect of the present invention, the damper is reversed when the guard is disassembled, and one end thereof (the front end when used, the rear end when the guard is disassembled) is attached and fixed to the rear guard. There is no risk of upset.

また、請求項９の発明によると、ダンパーを使用時と同じブラケットで後ガードに固定するため、この固定のためのコストが安くてすむ。 According to the invention of claim 9 , since the damper is fixed to the rear guard with the same bracket as in use, the cost for fixing can be reduced.

本発明の実施形態を図１〜図６によって説明する。   An embodiment of the present invention will be described with reference to FIGS.

この実施形態では油圧ショベルを適用対象として例示している。なお、キャビン４そのものの構成は図７〜図９に示す従来技術と同じであるため、この同一部分には同一符号を付してその重複説明を省略する。   In this embodiment, a hydraulic excavator is illustrated as an application target. Since the configuration of the cabin 4 itself is the same as that of the prior art shown in FIGS. 7 to 9, the same parts are denoted by the same reference numerals, and redundant description thereof is omitted.

実施形態に係るヘッドガード装置１１は、キャビン４のルーフ４ａの後部を上から覆って落下物から防護する後ガード１２と、ルーフ前部を上から覆って防護する前ガード１３とから成っている。   The head guard device 11 according to the embodiment includes a rear guard 12 that covers the rear portion of the roof 4a of the cabin 4 from above and protects against falling objects, and a front guard 13 that covers and protects the roof front portion from above. .

後ガード１２は、前端部及び中間部の左右両側（計四個所）でルーフ後部上面にボルト１４…で固定されている。   The rear guard 12 is fixed to the upper surface of the rear portion of the roof with bolts 14 at both the left and right sides (four locations in total) of the front end portion and the middle portion.

なお、図５,６に示すように、後ガード１２の前端部は下向きに折り曲げられている。
また、この折り曲げ部分の内側にＬ字形の補強材１５が設けられ、この折り曲げ部分と補強材１５とによって後ガード前端部が断面ロの字形の高剛性断面構造とされている。 As shown in FIGS. 5 and 6, the front end portion of the rear guard 12 is bent downward.
In addition, an L-shaped reinforcing member 15 is provided inside the bent portion, and the bent portion and the reinforcing member 15 form a high-rigidity cross-sectional structure with a rear guard front end having a square cross section.

前ガード１３は、前端部が左右両側のヒンジ部材１６,１６によって枢着され、このヒンジ部材１６,１６を支点に回動して、図１,３及び図４実線で示すように天窓５を覆う使用時（作業時）の閉じ姿勢と、図２及び図４二点鎖線で示すように後上がりに傾斜して天窓５の上方を開放する清掃時の開き姿勢との間で開閉し得るように構成されている。   The front guard 13 is pivotally attached at the front end by hinge members 16 and 16 on both the left and right sides, and pivots about the hinge members 16 and 16 so that the skylight 5 is formed as shown by solid lines in FIGS. It can be opened and closed between the closed position during use (working) and the open position during cleaning that inclines rearward and opens the top of the skylight 5 as shown by the two-dot chain lines in FIGS. It is configured.

なお、前ガード１３は、全体が格子状で、かつ、ルーフ前部の曲面に沿うように前部が先下がりに傾斜した側面視への字形に形成されている。   The front guard 13 has a lattice shape as a whole, and is formed in a letter shape in a side view in which the front part is inclined downward so as to follow the curved surface of the front part of the roof.

前ガード１３の後端には、左右両側と中間の三個所にＬ字形に屈曲する取付部１７…が後向きに突設され、閉じ姿勢で、この取付部１７…が後ガード１２の前端部上面に載置支持された状態でボルト１８…で止め付けられる。   At the rear end of the front guard 13, mounting portions 17 that are bent in an L shape are projected rearwardly at three positions on the left and right sides and in the middle, and in a closed position, the mounting portions 17 are the upper surface of the front end portion of the rear guard 12. Are fixed with bolts 18 in a state where they are placed and supported on.

これにより、前ガード１３が後ガード１２よりも高い位置で後ガード１２に連結されてヘッドガード装置１１が構成される。   As a result, the front guard 13 is connected to the rear guard 12 at a position higher than the rear guard 12 to constitute the head guard device 11.

ここで、取付部１７…は、後ガード前端部の対ルーフ取付点と同じ前後方向位置で後ガード前端部に取付けられる。図３中の直線Ｌ１は両者の取付点を通る水平線、図４〜図６中の直線Ｌ２は取付部１７…の対後ガード取付点を通る垂直線をそれぞれ示す。   Here, the attachment portions 17 are attached to the front end portion of the rear guard at the same position in the front-rear direction as the attachment point to the roof of the front end portion of the rear guard. A straight line L1 in FIG. 3 indicates a horizontal line passing through the attachment points of both, and a straight line L2 in FIGS. 4 to 6 indicates a vertical line passing through the attachment points 17.

いいかえれば、後ガード前端部の対ルーフ取付用、及び後ガード前端部の対前ガード連結用の各取付穴（とくに符号は付していない）が前後方向の同じ位置（直線Ｌ１上）に設けられている。   In other words, mounting holes (not marked) are provided at the same position in the front-rear direction (on the straight line L1) for mounting the front end of the rear guard to the roof and connecting the front guard to the front guard. It has been.

このヘッドガード装置１１によると、ルーフ全面を防護して高いキャビン保護効果を得ることができる一方で、前ガード１３が開閉するため天窓５の清掃が容易となる。   According to the head guard device 11, the entire roof surface can be protected and a high cabin protection effect can be obtained. On the other hand, the front guard 13 is opened and closed, so that the skylight 5 can be easily cleaned.

しかも、前ガード１３は、ルーフ４ａに取付けられた前端側を支点に回動して開閉するため、特許文献３に示されたスライド構造と比較して支持構造が簡単でコストが安くてすむとともに、開閉操作が容易となる。   Moreover, since the front guard 13 is opened and closed by turning the front end attached to the roof 4a as a fulcrum, the support structure is simpler and less expensive than the slide structure shown in Patent Document 3. Opening and closing operations are easy.

また、前ガード１３を閉じた状態でその後端部を後ガード１２に連結する構成、すなわち、落下物が当たる可能性が高いヘッドガード装置１１の前後方向中間部で前後両ガード１２,１３を連結する構成としたから、両ガード１２,１３が切り離された状態で別々に荷重を支持する構成とした場合と比較して、荷重を両ガード１２,１３で分担することで両
ガード１２,１３そのものの荷重支持力を高めることができる。加えて、ルーフ４ａにかかる荷重を両ガード１２,１３を通じて広く分散できるため、ルーフ防護効果の点で有利となる。 Further, the rear end of the front guard 13 is closed and the rear end of the front guard 13 is connected to the rear guard 12, that is, the front and rear guards 12, 13 are connected at the intermediate portion in the front-rear direction of the head guard device 11 that is likely to hit a falling object. Since the two guards 12 and 13 are separated from each other, the guards 12 and 13 share the load with the two guards 12 and 13. It is possible to increase the load supporting force. In addition, since the load applied to the roof 4a can be widely dispersed through both the guards 12 and 13, it is advantageous in terms of the roof protection effect.

この場合、
（Ｉ） 前ガード１３の後端部（取付部１７…）を後ガード１２の前端部上面に載置支持した状態で連結するため、たとえば両ガード１２,１３を同一高さ位置で突合せ状態で連結する場合と比較して、前ガード１３に作用する荷重が後ガード１２に垂直荷重として直接伝わり、荷重が両ガード１２,１３で確実に分担される。 in this case,
(I) Since the rear end portion (mounting portion 17...) Of the front guard 13 is mounted and supported on the upper surface of the front end portion of the rear guard 12, for example, both the guards 12 and 13 are brought into contact with each other at the same height position. Compared with the case of connection, the load acting on the front guard 13 is directly transmitted to the rear guard 12 as a vertical load, and the load is surely shared by the two guards 12 and 13.

（ＩＩ） 両ガード１２,１３の連結部分が、ルーフ４ａに対する後ガード前端部の取付部分（最も荷重支持力が高い部分）と前後方向の同じ位置にあるため、この連結部分の荷重支持能力が高いものとなる。なお、後ガード前端部は、前記のように断面ロの字形の高剛性断面構造としているため、荷重支持能力が一層高いものとなる。   (II) Since the connecting portion of both guards 12 and 13 is in the same position in the front-rear direction as the mounting portion (the portion having the highest load supporting force) of the rear guard front end with respect to the roof 4a, the load supporting capacity of this connecting portion is It will be expensive. Since the front end portion of the rear guard has a high-rigidity cross-sectional structure with a square cross section as described above, the load support capability is further increased.

以上の点により、ヘッドガード装置１１全体としてきわめて高い耐荷重性能を発揮し、キャビン保護効果にすぐれたものとなる。   From the above points, the head guard device 11 as a whole exhibits extremely high load bearing performance and is excellent in the cabin protection effect.

一方、この実施形態においては、前ガード１３を後ガード１２よりも高い位置で後ガード１２に連結しているため、前ガード１３を閉じた状態で前ガード１３の下方にワイパー収容空間１９（図４〜図６参照）が形成され、天窓５を拭くワイパー２０がこのワイパー収容空間１９において後ガード前端部にワイパー取付部材２１（図５参照）によって取付けられている。   On the other hand, in this embodiment, since the front guard 13 is connected to the rear guard 12 at a position higher than the rear guard 12, the wiper accommodating space 19 (see FIG. 4 to 6) is formed, and a wiper 20 for wiping the skylight 5 is attached to the front end of the rear guard by a wiper attachment member 21 (see FIG. 5) in the wiper housing space 19.

ワイパー取付部材２１は、ワイパーモータ等の機構部が収容されたハウジング２２の上面に固定されている。このハウジング２２には、下面に支持脚２３,２３、後面に支持部材２４がそれぞれ突設され、これらがルーフ４ａ上面に支持される。   The wiper mounting member 21 is fixed to the upper surface of a housing 22 in which a mechanism unit such as a wiper motor is accommodated. The housing 22 has support legs 23, 23 on the lower surface and support members 24 on the rear surface, which are supported on the upper surface of the roof 4a.

このように、ワイパー２０を、前ガード１３で覆われる状態で後ガード前端部に取付けたから、ワイパー２０を落下物から保護しながら天窓５のワイパー効果によって良好な上方視界を確保することができる。   As described above, since the wiper 20 is attached to the front end portion of the rear guard while being covered with the front guard 13, a good upper field of view can be secured by the wiper effect of the skylight 5 while protecting the wiper 20 from falling objects.

この場合、前ガード１３の後端部（取付部１７…）を後ガード前端部に載置支持させた状態で連結する構成をとったことの効果、すなわち、前ガード１３が後ガード１２よりも高位に位置することによって前ガード１３の後端部下方にワイパー収容空間１９が形成され、ここにワイパー２０を収容できるため、たとえばキャビン４のルーフ４ａを部分的に凹ませてワイパー収容空間を形成する場合や、両ガード１２,１３をともに高位置に設けることによってワイパー収容空間を確保する場合と比較して、ワイパー収容空間１９を簡単な構成で無理なく、低コストで形成することができる。   In this case, the effect of adopting the configuration in which the rear end portion (attachment portion 17...) Of the front guard 13 is connected to the rear guard front end portion in a mounted state, that is, the front guard 13 is more than the rear guard 12. Since the wiper accommodating space 19 is formed below the rear end of the front guard 13 by being positioned at a high position and the wiper 20 can be accommodated therein, for example, the roof 4a of the cabin 4 is partially recessed to form the wiper accommodating space. In comparison with the case of securing the wiper accommodation space by providing both the guards 12 and 13 at a high position, the wiper accommodation space 19 can be formed with a simple configuration without difficulty and at low cost.

また、前ガード１３が高位置にあることで前ガード１３と天窓５の間隔が広がるため、落下物を受けて前ガード１３が凹んだ場合でも天窓５の破損を防止できる利点がある。   Moreover, since the space | interval of the front guard 13 and the skylight 5 spreads because the front guard 13 exists in a high position, even when it receives a fallen object and the front guard 13 is dented, there exists an advantage which can prevent the damage to the skylight 5.

さらに、後ガード１２と前ガード１３との間には、左右両側に前ガード１３を緩やかに開くためのエア式または油圧式のダンパー２５が設けられている（図２,４,６参照）。   Further, an air-type or hydraulic-type damper 25 for gently opening the front guard 13 is provided between the rear guard 12 and the front guard 13 (see FIGS. 2, 4, and 6).

このダンパー２５は、図６に示すようにワイパー収容空間１９において後端部が後ガード１２の前端面に後側ブラケット２６を介して、また前端部が前ガード１３に前側ブラケット２７（図４参照）を介して、それぞれ左右方向の水平軸まわりに回動可能に取付けられている。   As shown in FIG. 6, the damper 25 has a rear end portion in the wiper housing space 19 via a rear bracket 26 on the front end surface of the rear guard 12, and a front end portion on the front guard 13 (see FIG. 4). ) Through the horizontal axis in the left-right direction.

前側ブラケット２７は前ガード１３に着脱可能に取付けられ、機械輸送時に制限高さを遵守するためにヘッドガード装置１１を後ガード１２と前ガード１３に分解して取外す場合に、ダンパー前端がこの前側ブラケット２７ごと前ガード１３から取外される。   The front bracket 27 is detachably attached to the front guard 13, and when the head guard device 11 is disassembled and removed into the rear guard 12 and the front guard 13 in order to comply with the restricted height during machine transportation, the front end of the damper is the front side. The bracket 27 is removed from the front guard 13.

ここで、後ガード１２にも前側ブラケット２７を取付けるための取付穴（図示省略）が設けられ、分解時に、ダンパー２５を図４中の二点鎖線で示すように反転させるとともに、取外された前側ブラケット２７を後ガード１２に移設し、ダンパー前端（反転状態では後端）を同ブラケット２７によって後ガード１２に固定できるように構成されている。   Here, the rear guard 12 is also provided with a mounting hole (not shown) for mounting the front bracket 27, and when disassembled, the damper 25 is reversed and removed as shown by a two-dot chain line in FIG. The front bracket 27 is moved to the rear guard 12, and the damper front end (rear end in the inverted state) can be fixed to the rear guard 12 by the bracket 27.

この構成によると、前ガード１３をダンパー２５によって安全にかつ楽に開閉することができる。   According to this configuration, the front guard 13 can be opened and closed safely and easily by the damper 25.

また、ヘッドガード装置１１の分解時に、ダンパー２５の一端（使用時の前端、ガード分解時の後端）を後ガード１２に固定できるため、輸送時にダンパー２５が動揺するおそれがない。しかも、ダンパー２５を使用時と同じブラケット２７で後ガード１２に固定するため、この固定のためのコストが安くてすむ。   Further, when the head guard device 11 is disassembled, one end of the damper 25 (the front end when in use, the rear end when the guard is disassembled) can be fixed to the rear guard 12, so that the damper 25 is not likely to be shaken during transportation. Moreover, since the damper 25 is fixed to the rear guard 12 with the same bracket 27 as in use, the cost for this fixing can be reduced.

図２〜図４中、２８は前ガード１３を開き状態に保持するためのステーで、一端部が後ガード１２の前端部に枢着され、前ガード１３の開き時に他端部が前ガード１３に係止される。   2 to 4, reference numeral 28 denotes a stay for holding the front guard 13 in an open state, one end of which is pivotally attached to the front end of the rear guard 12, and the other end of the front guard 13 when the front guard 13 is opened. It is locked to.

他の実施形態
（１） 両ガード１２,１３の連結に関して、上記実施形態では、後ガード後端部に対する前ガード後端部の取付点を、最も荷重支持力が高い後ガード前端部の対ルーフ取付点と同じ前後方向位置に設定したが、後ガード１２の前後の対ルーフ取付点間の部分も、対ルーフ取付点よりは劣るものの荷重支持力が高いため、前ガード後端部をこの部分に連結する構成をとってもよい。 Other Embodiments (1) Regarding the connection of both guards 12, 13, in the above embodiment, the attachment point of the front guard rear end portion with respect to the rear guard rear end portion is set to the roof of the rear guard front end portion having the highest load supporting force. Although it was set at the same longitudinal position as the attachment point, the portion between the front and rear attachment points of the rear guard 12 is also inferior to the attachment point of the roof, but the load bearing force is high. It may be configured to be connected to

あるいは、前ガード後端部を、後ガード１２の前側の対ルーフ取付点よりも前方で後ガード１２に連結する構成、具体的には図５,６において後ガード１２の前端を前方に延長させ、この延長部分に前ガード後端部を連結する構成をとってもよい。   Alternatively, the front guard rear end is connected to the rear guard 12 in front of the front roof mounting point of the rear guard 12, specifically, the front end of the rear guard 12 is extended forward in FIGS. A configuration may be adopted in which the rear end portion of the front guard is connected to the extended portion.

（２） 上記実施形態では、前ガード１３を後ガード１２よりも高い位置で後ガード１２に連結する構成をとったが、両ガード１２,１３を同じ高さ位置で連結するようにしてもよい。この場合、両ガード１２,１３を突合せ状態で相対向する端面で連結してもよいし、前ガード１３の後端部上面にブラケットを後向きに突設し、このブラケットを後ガード後端部上面に連結してもよい。   (2) In the above embodiment, the front guard 13 is connected to the rear guard 12 at a position higher than the rear guard 12, but both the guards 12, 13 may be connected at the same height position. . In this case, both the guards 12 and 13 may be connected to each other at the end faces facing each other, or a bracket is projected rearward on the upper surface of the rear end of the front guard 13, and the bracket is mounted on the upper surface of the rear guard rear end. You may connect to.

この構成によっても、連結部分にかかる荷重を両ガード１２,１３で分担するという基本的な効果は上記実施形態と同じである。この場合、ワイパー収容空間は、両ガード１２,１３を高い位置に設定すること等によって形成すればよい。 Also with this configuration, the basic effect of sharing the load applied to the connecting portion between the two guards 12 and 13 is the same as that of the above embodiment. In this case, the wiper accommodation space may be formed by setting both guards 12 and 13 at a high position .

本発明の実施形態にかかるヘッドガード装置を装着したキャビンの斜視図である。It is a perspective view of a cabin equipped with a head guard device concerning an embodiment of the present invention. ヘッドガード装置の前ガードを開いた状態の図１相当図である。FIG. 2 is a view corresponding to FIG. 1 in a state where a front guard of the head guard device is opened. ヘッドガード装置の平面図である。It is a top view of a head guard device. 図３のＩＶ−ＩＶ線断面図である。It is the IV-IV sectional view taken on the line of FIG. 図４の一部であってワイパー取付部分の拡大図である。FIG. 5 is an enlarged view of a part of FIG. 4 and a wiper mounting portion. 図４の一部であってダンパー取付部分の拡大図である。FIG. 5 is an enlarged view of a part of FIG. 4 where a damper is attached. 従来の全面防護型のヘッドガード装置を装備した油圧ショベルの概略側面図である。It is a schematic side view of a hydraulic excavator equipped with a conventional full-guard head guard device. 同キャビンの斜視図である。It is a perspective view of the cabin. 従来の開閉型のヘッドガード装置を装着したキャビンの斜視図である。It is a perspective view of a cabin equipped with a conventional opening / closing type head guard device.

４ キャビン
４ａ ルーフ
５ 天窓
１１ ヘッドガード装置
１２ 後ガード
１３ 前ガード
１４ 後ガード取付用のボルト
１６ 前ガード取付用のヒンジ部材
１７ 前ガードの対後ガード取付部
１８ 同ボルト
１９ ワイパー収容空間
２０ ワイパー
２５ ダンパー
２６ ダンパー取付用の後側ブラケット
２７ 前側ブラケット 4 cabin 4a roof 5 skylight 11 head guard device 12 rear guard 13 front guard 14 rear guard mounting bolt 16 front guard mounting hinge member 17 front guard opposite guard mounting portion 18 same bolt 19 wiper receiving space 20 wiper 25 Damper 26 Damper mounting rear bracket 27 Front bracket

Claims (9)

キャビンのルーフ後部を上から覆って防護する後ガードと、天窓を含むルーフ前部を上から覆って防護する前ガードとから成り、この前ガードは、前端部がヒンジ部材によりルーフに枢着されて開閉し、閉じ状態で後端部が後ガードに着脱可能に連結されるように構成されたことを特徴とする建設機械のキャビンヘッドガード装置。 It consists of a rear guard that covers and protects the rear part of the roof of the cabin from above, and a front guard that covers and protects the front part of the roof including the skylight from above, and this front guard is pivotally attached to the roof by a hinge member. opening and closing Te, for a construction machine the rear end in the closed state is characterized by being configured to so that is detachably connected to the rear guard cabin head guard device. 前ガードの後端部が後ガードの前端部上面に載置支持された状態で着脱可能に連結されるように構成されたことを特徴とする請求項１記載の建設機械のキャビンヘッドガード装置。 Construction machine cabin overhead guard apparatus according to claim 1, characterized in that it is configured prior to the rear end of the guard is worn detachably coupled in a state of being placed supported on the front end portion upper surface of the rear guard . 後ガードは前端部を含む前後複数個所でルーフに取付けられ、前ガード後端部が、この後ガードの前端部とその直後部の対ルーフ取付点間で後ガードに連結されるように構成されたことを特徴とする請求項２記載の建設機械のキャビンヘッドガード装置。 The rear guard is attached to the roof at a plurality of front and rear positions including the front end portion, and the front guard rear end portion is configured to be connected to the rear guard between the front end portion of the rear guard and the point immediately below the rear guard. The cabin head guard device for a construction machine according to claim 2. 前ガード後端部が、後ガード前端部の対ルーフ取付点と同じ前後方向位置で後ガード前端部に連結されるように構成されたことを特徴とする請求項３記載の建設機械のキャビンヘッドガード装置。 4. The cabin head of a construction machine according to claim 3 , wherein the rear end portion of the front guard is configured to be connected to the front end portion of the rear guard at the same longitudinal position as the attachment point of the front end portion of the rear guard to the roof. Guard device. 天窓を拭くワイパーが、上方から前ガードで覆われる状態で前ガード後端部または後ガード前端部に取付けられたことを特徴とする請求項１乃至４のいずれか１項に記載の建設機械のキャビンヘッドガード装置。 Wiper to wipe the skylight construction machine according to any one of claims 1 to 4, wherein the mounting et a prior guard rear end or rear guard front end in a state covered with front guard from above Cabin head guard device. 前ガードが後ガードよりも高い位置で後ガードに連結されることにより、前ガードの下方にワイパー収容空間が形成され、ワイパーがこのワイパー収容空間で前ガード後端部または後ガード前端部に取付けられたことを特徴とする請求項５記載の建設機械のキャビンヘッドガード装置。 By connecting the front guard to the rear guard at a position higher than the rear guard, a wiper housing space is formed below the front guard, and the wiper is attached to the rear guard front end or the rear guard front end in the wiper housing space. cabin overhead guard system for a construction machine according to claim 5 Symbol mounting, characterized in that it has been. 前ガードを緩やかに開くダンパーが、前ガードと後ガードとの間に取付けられたことを特徴とする請求項１乃至６のいずれか１項に記載の建設機械のキャビンヘッドガード装置。 The cabin head guard device for a construction machine according to any one of claims 1 to 6, wherein a damper that gently opens the front guard is attached between the front guard and the rear guard . ダンパーは、後ガードに対する取付点を支点として回動し、ガード使用時には一端が前ガード下面に着脱可能に取付けられ、ガード分解時にはこの使用時姿勢から後向きに反転して一端が後ガード上面に取付けられるように構成されたことを特徴とする請求項７記載の建設機械のキャビンヘッドガード装置。 The damper pivots around the mounting point for the rear guard. When the guard is used, one end is detachably attached to the lower surface of the front guard. construction machine cabin overhead guard according to claim 7 Symbol mounting, characterized in that it is adapted to be. ダンパーの一端が、ガード使用時には前ガードに、ガード分解時には後ガードにそれぞれ共通のブラケットによって取付けられるように構成されたことを特徴とする請求項８記載の建設機械のキャビンヘッドガード装置。 One end of the damper, the guard before the time guard use, construction machine of the cabin overhead guard apparatus according to claim 8, characterized in that it is configured such that each attached taken by a common bracket to the rear guard at the guard degradation.
JP2006352374A 2006-12-27 2006-12-27 Cabin head guard device for construction machinery Active JP4867651B2 (en)

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JP4775317B2 (en) * 2007-05-17 2011-09-21 コベルコ建機株式会社 Head guard device for construction machinery
JP5518596B2 (en) * 2010-06-30 2014-06-11 日立建機株式会社 Cab guard for work equipment
JP5533905B2 (en) * 2012-02-01 2014-06-25 コベルコ建機株式会社 Cabin guard device for construction machinery
JP5393850B1 (en) 2012-07-23 2014-01-22 株式会社小松製作所 Wiper device, open / close guard with wiper device, and cab for construction machinery
JP5771171B2 (en) * 2012-09-13 2015-08-26 日立建機株式会社 Front window wiper device
JP5751429B2 (en) * 2012-11-22 2015-07-22 コベルコ建機株式会社 Cab guard device for construction machinery

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JPH09228422A (en) * 1996-02-22 1997-09-02 Hitachi Constr Mach Co Ltd Guard for driver's cab of construction machine
JP2002188180A (en) * 2000-12-20 2002-07-05 Shin Caterpillar Mitsubishi Ltd Cab of construction equipment

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