JP4425385B2

JP4425385B2 - Construction machinery cab with sliding door

Info

Publication number: JP4425385B2
Application number: JP28521599A
Authority: JP
Inventors: 孝志藤本; 禎伸森数
Original assignee: Press Kogyo Co Ltd
Current assignee: Press Kogyo Co Ltd
Priority date: 1999-10-06
Filing date: 1999-10-06
Publication date: 2010-03-03
Anticipated expiration: 2019-10-06
Also published as: JP2001106122A

Description

【０００１】
【発明の属する技術分野】
本発明は、スライドドアを備えた建設機械用キャブの改良に関するものである。
【０００２】
【従来の技術】
近年の建設機械のキャブ（運転室）においては、その作業時に、旋回台上でキャブ（運転室）のドアを開いても旋回台からドアがはみ出ないように、例えば実開平６−１２５５６号公報に開示される如きスライドドア装置を採用することが多くなっている。更に、運転者の視界を拡大し、またキャブへの出入りを便ならしめるため、例えば特開平１１−９３２１６号公報に開示され、図６以下に示す如きスライドドア装置が案出されている。
【０００３】
これはキャブ１の前面から側面の略１／２までを大きく開口し、該開口部１ａを、透明なガラスまたはプラスティックス板２を枠材３に取付けたスライドドア４で開閉するよう、該ドアをキャブ１の外側に沿って摺動（スライド）させてドア開口部１ａの開閉を行うものである。
【０００４】
この場合、前記スライドドア４は大型で、重量も比較的大であるため、ドア４をガイドレール、支持レール相当部材に次のように案内、支持せしめる。即ち、スライドドア４の上部前端では、図８に示す如き上部前ガイドレール５にスライドドア４から延びるアーム７に支持した水平ガイドローラ８を遊合させ、前記ドア４の上部後端では、図８に示す上部後ガイドレール６にスライドドア４から延びるアーム７’に支持した水平ガイドローラ８’を遊合させる。更に、必要に応じて上部前ガイドレール５を後方に延長し、該レールにスライドドア４の上部中間を、図示しないガイドローラを介して係合させている。
【０００５】
また、前記ドア４の下部前端では、前記上部前ガイドレール５と平面位相を合致させた下部前ガイドレール（図示せず）に、スライドドア４から延びるアーム（同上）に支持した水平ガイドローラ（同上）を遊合させるとともに、前記アームに水平ガイドローラと併設した垂直支持ローラ（同上）により、床結合部材を兼ねた支持レール相当部材（同上）上に支持している。更に、前記ドア４の上下方向中間にある後端では、図６に示すキャブ１の外側に敷設した中間ガイドレール９に、前記した如き、水平ガイドローラ及び垂直支持ローラを係合させ、前記ドア４の後端の案内と支持をしている。
【０００６】
そして、比較的大型のキャブの場合には図７、図８に示すように、キャブ１の外側面のほぼ中央にセンタピラー（中間縦柱）１０を立設し、床１１と屋根部材１２とを連結、補強している。このうち屋根部材１２との連結は、実際には図９に示すように、前記上部前、後ガイドレール５、６が、ルーフ１３を取付けたルーフ枠材（屋根横材）１２の下面に並行に固着されるので、前記センタピラー１０の上端は、キャブ外方に開放された状態、即ち開断面状態で前記ルーフ枠材１２のキャブ内方側に溶接等で接続されている。
【０００７】
ところで、前記センタピラー１０付近では、スライドドア４の閉止時には、スライドドア４の上部後端のガイドローラ８’が上部ガイドレール６の屈曲部６ａに位置し、前記ドア４の開放時には、スライドドア４の上部前端のガイドローラ８が上部ガイドレール５の開放端側に位置する。そして、建設機械の作業はスライドドア４を開放した状態か、閉止した状態かのいずれかで行われるのが通常なので、作業中にキャブが受ける振動が、センタピラー１０の付近にある前記ガイドローラ８、８’及びガイドレール５、６を介してセンタピラー１０に伝達される。また、上部前ガイドレール５がセンタピラー１０より後方に延長され、該レール５にスライドドア４の上部中間を係合したものでは、ドア４の開、閉のいずれのときもガイドローラがセンタピラー１０上を通過し、これが前記同様にセンタピラー１０に伝達される。
【０００８】
したがって、センタピラー１０の上端が、前記図９のように開断面状態でルーフ枠材１２と接続されているものでは、前記振動等の継続によって、殊にセンタピラー１０上端とルーフ枠材１２との接続部分に亀裂等を発生する恐れがある。その確度は、建設機械がしばしば受ける衝撃荷重によって高くなることは十分予想される。また、建設機械が横転したときなど、従来のものでは前記閉断面部が座屈し、居住空間内にルーフ回り部品が入り込んでくるおそれもある。
【０００９】
【発明が解決しようとする課題】
実用新案登録公報第２５６４６８０号には、センタピラーの上部奥側にピラーの上面と同一高さとなる三角形状のリブを設ける考案が開示されているが、これは、上記構成によって、ルーフパネル下端とピラーとの間に所望長さの深い切欠部を設け、ここを経てスライドドアのアッパローラのガイドレールを後部に延設できるようにしたもので、ルーフ枠材とピラーとの接続強度を高めるものではない。
【００１０】
よって、本発明の解決しようとする課題は、センタピラーとルーフ枠材との接続強度を高めたスライドドアを備えた建設機械用キャブを提供することにある。
【００１１】
【課題を解決するための手段】
上記課題を解決するための本発明スライドドアを備えた建設機械用キャブは、ドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と一体的に形成し、拡大部と前記ルーフ枠材とが、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合したことを特徴とするもの及びドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と別体に形成し、該拡大部の上端には連続して前記ルーフ枠材と連結する、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合した事を特徴とするものである。
【００１２】
【発明の実施の形態】
本発明スライドドアを備えた建設機械用キャブの好ましい実施の形態を、図１乃至図５により詳細に説明すると、ドア開口部１ａを開閉するスライドドア４を有するキャブ１の、上部ガイドレール５，６が複数本配設される箇所において、該レール５，６をこれを固着したルーフ枠材１２とともに支持するセンタピラー１０，２０の上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を２２、センタピラー１０，２０の本体２１と一体的に形成し、拡大部２２と前記ルーフ枠材１２とが、縦断面がコ字形をなし、左右に翼状部２２ｂを有する結合材の一方を構成する結合外材２５と、該外材２５との間に空間２４を設けてセンタピラー１０，２０上端内側とルーフ枠材１２とを連結する結合材の他方を構成する結合内材２３とにより結合したことを特徴とするもの及びドア開口部１ａを開閉するスライドドア４を有するキャブ１の、上部ガイドレール５，６が複数本配設される箇所において、該レール５，６をこれを固着したルーフ枠材１２とともに支持するセンタピラー１０，２０の上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部２２を、センタピラー１０，２０の本体２１と別体に形成し、該拡大部２２の上端には連続して前記ルーフ枠材１２と連結する、縦断面がコ字形をなし、左右に翼状部２６ｃを有する結合材の一方を構成する結合外材２５と、該外材との間に空間２４’を設けてセンタピラー１０，２０上端内側とルーフ枠材１２とを連結する結合材の他方を構成する結合内材２３’とにより結合した事を特徴とするものである。
なお、図１は本発明に係るセンタピラー上端とルーフ枠材との接続構造の一例を、キャブ内部斜下方から見た図、図２は図１のＡ−Ａ線断面矢視図、図３は前記接続構造をキャブ外部斜下方から見た図、図４は前記接続構造の他の例の縦断面図、また、図５は前記接続構造の他の例をキャブ内部斜上方から見た図である。
【００１３】
図１乃至図３に示す例において、１２は前記ルーフ枠材で、その下面には前記上部前ガイドレール５及び同上部後ガイドレール６が並設、固着されている。２０は本発明に係るセンタピラーで、閉断面をもつピラー本体２１の上端付近には、上端２１ａに向かって徐徐にキヤブ内方に拡大する拡大部２２を、前記ピラー本体２１と一体に形成しており、上記拡大部２２に続いて上端にフランジ２２ａが形成されている。前記拡大部２２は、図１、図３に示すように平面的にはＴ字形を成し、左右に翼状部２２ｂを有している。
【００１４】
２３は、前記ピラー本体２１上端内側と前記ルーフ枠材１２のキャブ内方側を接続する結合内材で、後記結合外材２５とともに結合材を構成して左右に延びており、且つ図２に示すようにルーフ枠材１２の下面との間に、前記上部前、後ガイドレール５、６及び図示しないガイドローラ（８、８’）及びアーム（７、７’）を配設するに必要且つ十分な開放空間２４を確保するように設定されている。
【００１５】
２５は結合外材で、結合材の一環を成し、前記ルーフ枠材１２の上端より前記拡大部２２のフランジ２２ａの内側を経て前記結合内材２３の下面に到るよう、縦断面でコ字形に、また平面的には前記拡大部２２を上方に延長したように、左右に翼状部２５ａを有している。そして結合外材２５は、ルーフ枠材１２、センタピラー２０の拡大部２２のフランジ２２ａ及び前記結合内材２３の下面と溶接等で結合するとともに、結合外材２５及び前記拡大部２２の各翼状部２５ａ、２２ｂは、前記結合内材２３に溶接等で結合されている。
【００１６】
図４、図５に示したものは、図９に示す従来のものに、本願発明の目的に沿った補強を施す場合に適した例であって、図９と同一の符号は同一の部品、部材を示す。図４、図５において２６は、前記コ字形結合外材２５と前記拡大部２２を一体に成形した如き補強結合材で、キャブ内方に突出２６ａして空間２７を形成し、ピラー本体１０ａの上端１０ｂ付近から徐々に突出２６ａを縮小して前記本体１０ａに添う如き拡大部２６ｂを有し、左右に短い翼状部２６ｃをもつている。このような補強結合材２６を、図４、図５のように従来のセンタピラー１０の上端付近とルーフ枠材１２の上面の間に掛け、また翼状部２６ｃを結合内材２３’に溶接等により結合するものである。
【００１７】
以上のように構成された本発明に係るキャブでは、２０、１０の内側とルーフ枠材のキャブ内方端を連結する結合内材２３等と、該結合内材２３等の外方（キャブ内方）側に閉断面を構成しつつ且つキャブ外方側に開放空間２４’を設けた、結合外材２５及びこれと連続するセンタピラー２０上端付近の拡大部２２、または補強結合材２６とにより成されることによって、前記接続部の強度が増大し、前記建設機械の作業中の振動等によってもセンタピラー２０、１０又は該ピラーとルーフ枠材１２との接続部の損傷は生じない。
【００１８】
【発明の効果】
本発明スライドドアを備えた建設機械用キャブは、ドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と一体的に形成し、拡大部と前記ルーフ枠材とが、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合したことを特徴とするもの及びドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と別体に形成し、該拡大部の上端には連続して前記ルーフ枠材と連結する、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合した事を特徴とするので、センタピラーの上端と前記ルーフ枠材との接続が、センタピラーの内側とルーフ枠材のキャブ内方端を連結する結合内材等と、該結合内材等の外方（キャブ内方）側に閉断面を構成しつつ設けた、結合外材及びこれと連続するセンタピラー上端付近の拡大部、または補強結合材とにより成されることにより、センタピラーとルーフ枠材との接続強度を高めたスライドドアを備えた建設機械用キャブを提供する効果がある。
【図面の簡単な説明】
【図１】本発明スライドドアを備えた建設機械用キャブにおけるセンタピラー上端とルーフ枠材との接続構造の一例を、キャブ内部斜下方から見た図
【図２】図１のＡ−Ａ線断面矢視図
【図３】図１の接続構造をキャブ外部斜下方から見た図
【図４】本発明スライドドアを備えた建設機械用キャブにおけるセンタピラー上端とルーフ枠材との接続構造の他の例の縦断面図
【図５】本発明スライドドアを備えた建設機械用キャブにおけるセンタピラー上端とルーフ枠材との接続構造の他の例を、キャブ外部斜下方から見た図
【図６】従来のスライドドアを備えた建設機械用キャブのドア閉止時の外観斜視図
【図７】従来のスライドドアを備えた建設機械用キャブのドア開放時の外観斜視図
【図８】従来のスライドドアを備えた建設機械用キャブのドア開、閉時の平面略示図
【図９】従来のスライドドアを備えた建設機械用キャブにおけるセンタピラー上端とルーフ枠材との接続構造の縦断面図。
【符号の説明】
１キャブ
４スライドドア
５上部前ガイドレール
６上部後ガイドレール
７、７’ アーム
８、８’ 水平ガイドローラ
９中間ガイドレール
１０、２０センタピラー
１１床
１２ルーフ枠材
１３ルーフ
１４、２７中間縦柱
１５支持横材
１６床
１７、１８ガイドレール支持材
１９屋根
２１ピラー本体
２２拡大部
２２ａフランジ
２２ｂ、２６ｃ翼状部
２３、２３’ 結合内材
２４、２４’ 開放空間
２５結合外材
２６補強結合材
２６ａ突出
２６ｂ拡大部
２７空間。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a cab for a construction machine provided with a sliding door.
[0002]
[Prior art]
In a cab (operating room) of a construction machine in recent years, for example, Japanese Utility Model Publication No. 6-12556 discloses that the door does not protrude from the swivel base even if the cab (operating room) door is opened on the swivel base. In many cases, a sliding door device as disclosed in Japanese Patent Application No. H07-260260 is employed. Furthermore, in order to enlarge the driver's field of view and to make it easier to enter and exit the cab, for example, Japanese Patent Laid-Open No. 11-93216 discloses a slide door device as shown in FIG.
[0003]
This is a large opening from the front surface of the cab 1 to about half of the side surface, and the opening 1a is opened and closed by a sliding door 4 having a transparent glass or plastic plate 2 attached to a frame member 3. Is slid along the outside of the cab 1 to open and close the door opening 1a.
[0004]
In this case, since the slide door 4 is large and has a relatively large weight, the door 4 is guided and supported by a guide rail and a support rail equivalent member as follows. That is, at the upper front end of the slide door 4, a horizontal guide roller 8 supported by an arm 7 extending from the slide door 4 is loosely engaged with the upper front guide rail 5 as shown in FIG. A horizontal guide roller 8 ′ supported by an arm 7 ′ extending from the slide door 4 is loosely coupled to the upper rear guide rail 6 shown in FIG. Further, the upper front guide rail 5 is extended rearward as necessary, and the upper middle of the slide door 4 is engaged with the rail via a guide roller (not shown).
[0005]
Further, at the lower front end of the door 4, a horizontal guide roller (supported by the lower front guide rail (not shown) in phase with the upper front guide rail 5 and supported by an arm (same as above) extending from the slide door 4. The above-mentioned arm is supported on a support rail equivalent member (same as above) that also serves as a floor coupling member by a vertical support roller (same as above) provided along with a horizontal guide roller on the arm. Further, at the rear end in the middle of the door 4 in the vertical direction, the horizontal guide roller and the vertical support roller as described above are engaged with the intermediate guide rail 9 laid outside the cab 1 shown in FIG. 4 The rear end is guided and supported.
[0006]
In the case of a relatively large cab, as shown in FIGS. 7 and 8, a center pillar (intermediate vertical column) 10 is erected substantially at the center of the outer surface of the cab 1, and a floor 11, a roof member 12 , Are connected and reinforced. Of these, as shown in FIG. 9, the connection with the roof member 12 is actually parallel to the lower surface of the roof frame member (roof cross member) 12 to which the upper front and rear guide rails 5 and 6 are attached. Therefore, the upper end of the center pillar 10 is connected to the cab inward side of the roof frame member 12 by welding or the like in an open state outside the cab, that is, in an open cross-sectional state.
[0007]
By the way, in the vicinity of the center pillar 10, when the slide door 4 is closed, the guide roller 8 ′ at the upper rear end of the slide door 4 is positioned at the bent portion 6 a of the upper guide rail 6, and when the door 4 is opened, the slide door 4 is opened. 4 is located on the open end side of the upper guide rail 5. Since the work of the construction machine is usually performed in a state in which the slide door 4 is opened or closed, the guide roller in the vicinity of the center pillar 10 is subjected to vibrations received by the cab during the work. 8 and 8 'and the guide rails 5 and 6 are transmitted to the center pillar 10. In the case where the upper front guide rail 5 is extended rearward from the center pillar 10 and the upper middle of the slide door 4 is engaged with the rail 5, the guide roller is the center pillar both when the door 4 is opened and closed. 10 is transmitted to the center pillar 10 in the same manner as described above.
[0008]
Therefore, in the case where the upper end of the center pillar 10 is connected to the roof frame member 12 in an open cross-section state as shown in FIG. 9 , the center pillar 10 upper end and the roof frame member 12 are There is a risk that cracks and the like may occur in the connecting portion of the. It is fully expected that the accuracy will increase due to the impact load that construction machines often receive. Further, such as when the construction machine is overturned, than the conventional the closed-section portion is bending the seat, there is a possibility to come enters roof around parts living space.
[0009]
[Problems to be solved by the invention]
Utility model registration publication No. 2564680 discloses a device in which a triangular rib having the same height as the upper surface of the pillar is provided on the upper back side of the center pillar. A notch part with a desired length is provided between the pillar and the guide rail of the upper roller of the sliding door can be extended to the rear part through this, so as to increase the connection strength between the roof frame material and the pillar. Absent.
[0010]
Therefore, the problem to be solved by the present invention is to provide a cab for a construction machine provided with a sliding door having enhanced connection strength between a center pillar and a roof frame member.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, a cab for a construction machine having a sliding door according to the present invention has a cab having a sliding door that opens and closes a door opening at a location where a plurality of upper guide rails are disposed. The upper portion of the center pillar that supports the fixed roof frame material is gradually enlarged toward the upper end toward the inside of the cab , and the enlarged portion is formed integrally with the main body of the center pillar. The roof frame material has a U-shaped longitudinal cross-section, and a joint outer member constituting one of the joint members having wing-like portions on the left and right sides, and a space is provided between the outer member and a center pillar upper end inner side and a roof frame member cab with sliding door for opening and closing those and the door opening and wherein the bound by the binding in the material constituting the other of the coupling members for connecting the door, the upper guide rail plurality of distribution At the point that is, the upper end vicinity of the center pillar which supports with roof frame member which is fixed to this the rail, while gradually expanding the cab inwardly toward the upper end, said enlarged portion, a body of the center pillar A separate outer member formed in a separate body, continuously connected to the roof frame member at the upper end of the enlarged portion, and having a U-shaped longitudinal section and constituting one of the binding members having wing-like portions on the left and right sides; A space is provided between the outer member and the inner end of the center pillar and the roof frame member .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the construction machine cab equipped with the present invention the sliding door, will be described in more detail in FIGS. 1-5, the cab 1 having a sliding door 4 for opening and closing the door opening 1a, the upper guide rail 5 , 6 are arranged at a location where a plurality of center pillars 10 and 20 supporting the rails 5 and 6 together with the roof frame member 12 to which the rails 5 and 6 are fixed are gradually moved toward the inside of the cab toward the upper end. While expanding, the said enlarged part 22 is integrally formed with the main body 21 of the center pillars 10 and 20, and the enlarged part 22 and the said roof frame material 12 comprise a U-shaped longitudinal section, and the wing-like part 22b on the right and left A coupling outer member 25 constituting one of the coupling members having a gap and a space 24 provided between the outer member 25 and the other of the coupling members for connecting the center pillars 10 and 20 and the roof frame member 12 to each other. In places where the cab 1 having a sliding door 4 for opening and closing those and the door opening 1a, characterized in that bound by the engagement within member 23, the upper guide rail 5 and 6 are a plurality of arranged, the rail 5 The center pillars 10 and 20 that support the roof frame member 12 to which the frame pillars 6 and 6 are fixed are gradually enlarged toward the upper end toward the inside of the cab, and the enlarged portion 22 is made to extend toward the center pillars 10 and 20. One of the binders having a U-shaped longitudinal section and a wing-like portion 26c on the left and right is connected to the roof frame member 12 continuously at the upper end of the enlarged portion 22. The coupling outer member 25 to be configured and the coupling inner member 23 ′ that constitutes the other of the coupling members that connect the upper ends of the center pillars 10 and 20 and the roof frame member 12 by providing a space 24 ′ therebetween. What you did It is a feature.
1 is a view of an example of a connection structure between a center pillar upper end and a roof frame member according to the present invention as seen from the obliquely lower side of the cab, FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a longitudinal sectional view of another example of the connection structure, and FIG. 5 is a view of another example of the connection structure as viewed from above the cab. It is.
[0013]
In the example shown in FIGS. 1 to 3, reference numeral 12 denotes the roof frame member, and the upper front guide rail 5 and the upper rear guide rail 6 are juxtaposed and fixed to the lower surface thereof. Reference numeral 20 denotes a center pillar according to the present invention. In the vicinity of the upper end of the pillar body 21 having a closed cross section, an enlarged portion 22 that gradually expands inward toward the upper end 21a is formed integrally with the pillar body 21. A flange 22 a is formed at the upper end following the enlarged portion 22. As shown in FIGS. 1 and 3, the enlarged portion 22 has a T-shape in a plan view and has wing-like portions 22 b on the left and right.
[0014]
Reference numeral 23 denotes a joint inner member for connecting the upper end inner side of the pillar main body 21 and the inner side of the cab of the roof frame member 12, and constitutes a joint member together with a joint outer member 25 to be described later and extends to the left and right, and is shown in FIG. Thus, it is necessary and sufficient to dispose the upper front and rear guide rails 5, 6 and the guide rollers (8, 8 ') and arms (7, 7') not shown between the lower surface of the roof frame member 12 as described above. Is set so as to secure a large open space 24.
[0015]
Reference numeral 25 denotes a joint outer member, which forms a part of the joint member, and is U-shaped in a longitudinal section so as to reach the lower surface of the joint inner member 23 from the upper end of the roof frame member 12 through the inside of the flange 22a of the enlarged portion 22. In addition, the wing-like portions 25a are provided on the left and right so that the enlarged portion 22 extends upward in plan view. The outer joint member 25 is joined to the roof frame member 12, the flange 22a of the enlarged portion 22 of the center pillar 20 and the lower surface of the inner joint member 23 by welding or the like, and the outer member 25 and the wing-like portions 25a of the enlarged portion 22 are joined together. , 22b are joined to the joined inner member 23 by welding or the like.
[0016]
The examples shown in FIGS. 4 and 5 are examples suitable for applying reinforcement to the conventional one shown in FIG. 9 in accordance with the object of the present invention. The same reference numerals as those in FIG. The member is shown. 4 and 5, reference numeral 26 denotes a reinforcing joint material formed by integrally forming the U-shaped joint outer member 25 and the enlarged portion 22, and a space 27 is formed by projecting 26 a inward from the cab, and the upper end of the pillar body 10 a. The projection 26a is gradually reduced from the vicinity of 10b and has an enlarged portion 26b that follows the main body 10a, and has a short wing-like portion 26c on the left and right. As shown in FIGS. 4 and 5, such a reinforcing bonding member 26 is hung between the vicinity of the upper end of the conventional center pillar 10 and the upper surface of the roof frame member 12, and the wing-like portion 26c is welded to the bonding inner member 23 ′. Are combined.
[0017]
In the cab according to the present invention configured as described above, the inner connecting members 23 and the like that connect the inner sides of the cabs 20 and 10 and the cab inner end of the roof frame member, and the outer (inside the cab) And a reinforcing outer member 25 having a closed cross section on the side and an open space 24 ′ on the outer side of the cab, and an enlarged portion 22 in the vicinity of the upper end of the center pillar 20 or a reinforcing binder 26. As a result, the strength of the connecting portion is increased, and the center pillars 20 and 10 or the connecting portion between the pillar and the roof frame member 12 are not damaged by vibration or the like during the operation of the construction machine.
[0018]
【The invention's effect】
The cab for a construction machine having a sliding door according to the present invention has a cab having a sliding door that opens and closes a door opening, and a location where a plurality of upper guide rails are disposed, together with a roof frame member to which the rail is fixed. The vicinity of the upper end of the supporting center pillar is gradually enlarged toward the upper end toward the inside of the cab , and the enlarged portion is formed integrally with the main body of the center pillar, and the enlarged portion and the roof frame member are A joint outer member having a U-shaped longitudinal cross section and forming one of the joint members having wing-like portions on the left and right sides, and a joint member for connecting the upper end of the center pillar and the roof frame member by providing a space between the outer members. in places where the cab having a sliding door for opening and closing those and the door opening and wherein the bound by the binding in the material constituting the other, the upper guide rail is plural arranged, the The upper end vicinity of the center pillar which supports with a Lumpur roof frame member which is fixed to it, while gradually expanding the cab inwardly toward the upper end, said enlarged portion, formed on the main body and another member of the center pillar The upper portion of the enlarged portion is continuously connected to the roof frame member, the vertical cross section is U-shaped, and the outer member and the outer connecting member constituting one of the connecting members having wing-like portions on the left and right sides. Since the space is provided and the center pillar upper end inner side and the roof frame member are joined together by a joint inner member constituting the other of the joint members, the connection between the center pillar upper end and the roof frame member is achieved. A coupling inner member for connecting the inner side of the center pillar and the cab inner end of the roof frame member, and a coupling outer member provided on the outer side (cab inner side) of the coupling inner member while forming a closed cross section; Magnification near the upper end of the continuous center pillar Or by being made by a reinforcing binder is effective to provide a construction machine cab having a sliding door with improved connection strength between the center pillar and the roof frame member.
[Brief description of the drawings]
FIG. 1 is a view of an example of a connection structure between an upper end of a center pillar and a roof frame member in a cab for a construction machine having a sliding door according to the present invention, as viewed obliquely from the inside of the cab. FIG. FIG. 3 is a view of the connection structure of FIG. 1 as viewed from obliquely below the cab exterior. FIG. 4 is a view of the connection structure between the upper end of the center pillar and the roof frame member in the cab for a construction machine having the sliding door of the present invention. Fig. 5 is a longitudinal sectional view of another example. Fig. 5 is a diagram showing another example of the connection structure between the upper end of the center pillar and the roof frame member in the construction machine cab provided with the sliding door according to the present invention as viewed obliquely from below the cab. 6] External perspective view of a construction machine cab with a conventional sliding door when the door is closed. [FIG. 7] External perspective view of a construction machine cab with a conventional sliding door when the door is opened. [FIG. Construction machinery cab with sliding door Door open, longitudinal sectional view of the connection structure between the center pillar top end and the roof frame members in the construction machine cab having a flat, substantially 示図 9 Conventional sliding door closed.
[Explanation of symbols]
1 Cab 4 Slide door 5 Upper front guide rail 6 Upper rear guide rail 7, 7 'Arm 8, 8' Horizontal guide roller 9 Intermediate guide rail 10, 20 Center pillar 11 Floor 12 Roof frame member 13 Roof 14, 27 Intermediate vertical column 15 Support cross member 16 Floor 17, 18 Guide rail support material 19 Roof 21 Pillar body 22 Enlarged portion 22a Flange 22b, 26c Wing-like portion 23, 23 'Inner joint member 24, 24' Open space 25 Outer joint member 26 Reinforced joint member 26a Projection 26b Enlarged part 27 space.

Claims

ドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と一体的に形成し、拡大部と前記ルーフ枠材とが、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合したことを特徴とするスライドドアを備えた建設機械用キャブ。In the cab having a sliding door that opens and closes the door opening, at the place where a plurality of upper guide rails are disposed, the vicinity of the upper end of the center pillar that supports the rail together with the roof frame member to which the rail is fixed is directed toward the upper end. The magnifying part gradually expands inward of the cab , and the enlarged part is formed integrally with the main body of the center pillar, and the enlarged part and the roof frame material have a U-shaped longitudinal section, and wing-like parts are formed on the left and right. A bonded outer material that constitutes one of the binding materials, and a bonded inner material that constitutes the other of the binding materials that connect the center pillar upper end inside and the roof frame material by providing a space between the outer materials. A cab for construction machinery with a sliding door.

ドア開口部を開閉するスライドドアを有するキャブの、上部ガイドレールが複数本配設される箇所において、該レールをこれを固着したルーフ枠材とともに支持するセンタピラーの上端付近を、上端に向かって徐々にキャブ内方側に拡大するとともに、前記拡大部を、センタピラーの本体と別体に形成し、該拡大部の上端には連続して前記ルーフ枠材と連結する、縦断面がコ字形をなし、左右に翼状部を有する結合材の一方を構成する結合外材と、該外材との間に空間を設けてセンタピラー上端内側とルーフ枠材とを連結する結合材の他方を構成する結合内材とにより結合した事を特徴とするスライドドアを備えた建設機械用キャブ。In the cab having a sliding door that opens and closes the door opening, at the place where a plurality of upper guide rails are disposed, the vicinity of the upper end of the center pillar that supports the rail together with the roof frame member to which the rail is fixed is directed toward the upper end. While gradually expanding inward of the cab, the enlarged portion is formed separately from the main body of the center pillar, and the upper end of the enlarged portion is continuously connected to the roof frame member. A joint outer member constituting one of the joint members having wing-like portions on the left and right sides, and a joint constituting the other of the joint members connecting the center pillar upper end inside and the roof frame member by providing a space between the outer members. A cab for construction machinery equipped with a sliding door characterized by being connected to the inner material .

前記結合外材及び結合外部が、左右に翼状部を有することを特徴とする請求項１記載または請求項２記載のスライドドアを備えた建設機械用キャブ。The cab for a construction machine provided with a sliding door according to claim 1 or 2, wherein the joint outer material and the joint exterior have wing-like portions on the left and right.