JP4280899B2

JP4280899B2 - Mobile crane with wheels and tracks on the chassis

Info

Publication number: JP4280899B2
Application number: JP2002367306A
Authority: JP
Inventors: 洋松本; 吉夫松本
Original assignee: 吉夫松本
Priority date: 2002-12-18
Filing date: 2002-12-18
Publication date: 2009-06-17
Anticipated expiration: 2022-12-18
Also published as: JP2004196131A

Description

【０００１】
【発明の属する技術分野】
車台に車輪と履帯を装着し、かつ車輪と履帯のいずれか一方が接地するよう構成した、道路走行時の迅速性と作業現場での優れた運用性を兼ね備えた移動式クレーンに関する。
【０００２】
【従来の技術及び発明が解決しようとしている課題】
従来の移動式クレーンには、その走行が車輪によるトラッククレーンと履帯によるキャタピラ式クレーンの２種類が存在し、それぞれの特色に合った用途に対応して使い分けられてきた。
ゴムタイヤを備えた車輪を有するトラッククレーンは、高速走行が可能で道路走行に適しており、作業現場への移動が容易かつ迅速にできる反面、クレーン操作によってそれぞれのタイヤに掛かる重力が変化すると、各タイヤがそれぞれ不規則に変形して不安定になるので、そのままでは作業ができないという難点がある。さらに車幅（車台幅）にも道路走行に適応するための制約を受け、重心もキャタピラ式クレーンに比べて高い位置にあることからそのままではクレーンの操作如何によっては横転する恐れがある。
したがって、作業現場における前記トラッククレーンは、図５の従来のトラッククレーンの作業時の設置状況を示す説明図に示すように、その車台８の前後２箇所に格納されている合計４本のアウトリガ５をそれぞれ２本ずつトラッククレーン１’の車台８の左右両側面に引き出し、それぞれのアウトリガ５の先端に取り付けられた油圧ジャッキ９によって前記トラッククレーン１’を持ち上げ、車輪２に重力が加わらないようにするとともに、アウトリガ５を引き出すことによってトラッククレーン１’の見かけ上の車幅を拡げ、横転防止を図っている。
しかし、この対策も油圧ジャッキ９の支点となる場所が強固な地盤でないと用をなさないのでトラッククレーン１’の設置場所に制約を受け、またクレーン操作中は設置場所を移動させることができないという難点があった。
【０００３】
一方履帯走行装置を備えたキャタピラ式クレーンは、走行速度が遅く道路走行に適さず作業現場までの自力移動が困難であることから、主要部分に分解してトラックやトレーラーに積載して運送する必要がある。
しかし、左右の履帯間隔が広くとれ、かつ鋼鉄製の履帯走行装置を有することから走行装置自体が重く、重心の位置も前記トラッククレーン１’より低くなるのでクレーン作業による横転の恐れは少ない。また、左右の履帯の運転操作によって、移動、方向変換、その場での回転が容易に行え、前記トラッククレーンに比べて作業現場での運用性に優れている。
【０００４】
本発明の課題は、前記トラッククレーン１’とキャタピラ式クレーンの長所を兼ね備えた移動式クレーン、すなわち、作業現場への迅速な移動が可能で、かつ、作業現場での運用性に優れた移動式クレーンを提供することにある。
【０００５】
【課題を解決するための手段】
本発明者は、上記課題を下記の手段で解決した。（１）トラッククレーンに左右１対の履帯走行装置が着脱自在に装着され、前記トラッククレーンの車輪と前記履帯走行装置の履帯のいずれか一方が接地して走行する車輪と履帯を備えた移動式クレーンにおいて、
前記トラッククレーンへの左右１対の履帯走行装置の装着が、前記履帯走行装置の躯体にボルトで着脱自在に装着され、前記トラッククレーンに装備され引き出されたアウトリガの先端部付近に固定される履帯装置装着具によってなされ、該履帯装置装着具が、履帯走行装置の躯体にボルトで着脱自在に装着するための１又は２個以上のボルト用貫通孔と、上部に前記アウトリガが挿入されるアウトリガ受け溝と前記アウトリガに履帯走行装置装着具を固定する機構を持つ覆い蓋とを備えてなることを特徴とする車台に車輪と履帯を備えた移動式クレーン。
【０００６】
（２）トラッククレーンへの履帯走行装置の装着が、前記トラッククレーンのアウトリガの先端に固着されている油圧ジャッキによって前記トラッククレーンの車体を持ち上げた後に、その下側に左右１対の履帯走行装置を挿入し、油圧ジャッキの油圧を緩めて徐々にトラッククレーンの車体を下降させて前記履帯走行装置装着具のアウトリガ受け溝に前記アウトリガの先端部付近を挿入することにより行われることを特徴とする前記（１）に記載の車台に車輪と履帯を備えた移動式クレーン。
（３）履帯走行装置の運転が、履帯走行装置の油圧モータと前記トラッククレーンに装備された操縦装置とを油圧ホースによって接続することにより可能となることを特徴とする前記（１）又は（２）に記載の車台に車輪と履帯を備えた移動式クレーン。
（４）運転室内に車輪、及び履帯の走行操縦装置備えてなることを特徴とする前記（１）〜（３）のいずれか１項に記載の車台に車輪と履帯を備えた移動式クレーン。
【０００７】
【発明の実施の形態】
本発明の実施の形態を、実施例の図面によって説明する。
図１は本発明の実施例の概要を示す斜視図、図２は本発明実施例の概略構成図、図３はトラッククレーンに履帯走行装置を装着する実施例の構成図、図４は履帯走行装置装着具の一実施例の（ａ）側面図、（ｂ）正面図、（ｃ）上面図であり、図５は従来のトラッククレーンの作業時の設置状況を示す説明図である。
図において１は本発明の車台に車輪と履帯を備えた移動式クレーン、１’はトラッククレーンであり、２は車輪、３は履帯走行装置、３’は履帯、４は履帯走行装置装着具、５はアウトリガ、６はブーム、７は運転室、８は車台、９は油圧ジャッキ、４１は履帯走行装置装着具本体、４２は覆い蓋、４３は蝶番、４４はロック機構、４５は装着ボルト用貫通孔、４６はアウトリガ受け溝である。
【０００８】
本発明の車台に車輪と履帯を備えた移動式クレーン１は、車台８に車輪２と履帯３’を装着し、かつ車輪２と履帯３’のいずれか一方が接地するように構成されるものであり、図１の本発明の実施例の概要を示す斜視図に示す車台に車輪と履帯を備えた移動式クレーン１は、ゴムタイヤを備えた車輪を有するトラッククレーン１’（図３参照、以下同様）に、履帯３’を駆動して走行する履帯走行装置３を着脱自在に装着して構成されている。
そして、本発明の移動式クレーン１における左右１対の履帯走行装置３の装着は、前記履帯走行装置３の躯体にボルトで着脱自在に装着された履帯走行装置装着具４を、前記トラッククレーン１’に装備され引き出されたアウトリガ５の先端部付近に固定してなされる。
【０００９】
図１の本発明の実施例の概要を示す斜視図及び図２の本発明実施例の概略構成図は、本発明の車台に車輪と履帯を備えた移動式クレーン１の実施例の１つである。
図１及び図２に示す移動式クレーン１は、トラッククレーン（１’）（図３参照）のアウトリガ５の先端部付近を、左右１対の履帯走行装置３の躯体にボルトで装着した履帯走行装置装着具４の上部に搭載して固定されて構成されるとともに、履帯走行装置３の油圧モータの動力源となる油圧を、図示しない油圧ホースを介して前記トラッククレーン（１’）の操縦装置から供給して稼働させる構成となっている。
本実施例の車台に車輪と履帯を備えた移動式クレーン１は、作業現場までの移動、つまり道路走行はトラッククレーンとしてゴムタイヤを備えた車輪２で行い、別途輸送した履帯走行装置３を作業現場で装着してキャタピラ式クレーンとして使用することができるものである。
【００１０】
以下作業現場でのトラッククレーン（１’）に履帯走行装置３を装着する手順によって本実施例の構成、作用を説明する。
通常、図３のトラッククレーンに履帯走行装置を装着する実施例の構成図に示すトラッククレーン１’は、車輪２と、アウトリガ５とブーム６と運転室７と車台８から構成されており、アウトリガ５は、前記トラッククレーン１’の車台８の前後端末付近に車体の左右にそれぞれ引き出せるよう合わせて４本配置され、そのそれぞれの先端に油圧ジャッキ９が固着されている。
作業現場に到着したトラッククレーン１’は、堅牢な地盤の場所において履帯走行装置３を装着される。
トラッククレーン１’への履帯走行装置３の装着は、トラッククレーン１’のそれぞれのアウトリガ５を車台８の左右に引き出し、アウトリガ５の先端に固着されている油圧ジャッキ９によってトラッククレーン１’の車体を持ち上げ、その下側に左右１対の履帯走行装置３を挿入することにより行われる。
なお、履帯走行装置３の躯体の前後には、図３に見られるように、あらかじめ履帯走行装置装着具４をボルトで固着しておく。
【００１１】
そして、前記履帯走行装置装着具４がボルトで固着された履帯走行装置３を、前述したように、油圧ジャッキ９によって車体が持ち上げられたトラッククレーン１’の車台８の下に挿入し、次いで油圧ジャッキ９を操作し、油圧ジャッキ９の油圧を緩めて、トラッククレーン１’の車体を徐々に下降させ、アウトリガ５の先端部付近を履帯走行装置装着具本体４１のアウトリガ受け溝４６に挿入する。
アウトリガ５をアウトリガ受け溝４６へ挿入した後、前記履帯走行装置装着具４の覆い蓋４２を閉じ、ロック機構４４（図４参照）をロックして履帯走行装置装着具４をアウトリガ５に固定する。これによって前記トラッククレーン１’の履帯走行装置３への搭載が完了する。
なお、履帯走行装置装着具４は、履帯走行装置３を挟むようにその左右両側に取り付けるのが強度を高めるうえで好ましい。
【００１２】
なお、図４は履帯走行装置装着具の一実施例であり、（ａ）は側面図、（ｂ）は正面図、（ｃ）は上面図である。
履帯走行装置３の躯体の長さは、トラッククレーン１’の車台８の長さより短いのが一般であることから、履帯走行装置装着具４はその側面がＬ字形に形成され、その履帯走行装置装着具本体４１の水平腕部先端付近には、履帯走行装置３の躯体に履帯走行装置装着具４を固着させるためのボルトを通す１又は複数の装着ボルト用貫通孔４５が穿設され、垂直腕部の上部には前記アウトリガ５を受けるアウトリガ受け溝４６が削設されている。また、前記履帯走行装置装着具本体４１の垂直腕部上部には蝶番等によって開閉自在な覆い蓋４２が装着されている。なお、覆い蓋４２の自由端には蓋をロックして履帯走行装置装着具４をアウトリガ５に固定するためのロック機構を備えている。
【００１３】
また、履帯走行装置３は油圧モータで駆動される構成となっている。したがって、履帯走行装置３にトラッククレーン１’を搭載した後、履帯走行装置３の油圧モータとトラッククレーン１’の油圧ポンプ及び操縦装置とを油圧ホースで接続することが好ましい。また、トラッククレーン１’の運転室７に、履帯走行装置３の操縦装置が配設されると、操作性がよい。
なお、上記の履帯走行装置装着具４は一例にすぎず、履帯走行装置３上に前記トラッククレーン１’を搭載できる形体と強度を備えたものであればよい。
【００１４】
【発明の効果】
本発明によって下記のような効果が発揮できる。
▲１▼ 車台に車輪と履帯を装着し、かつ車輪と履帯のいずれか一方が設置するように構成したことにより、道路走行時の迅速性と、作業現場での優れた運用性の両者を兼ね備えた移動式クレーンが実現できる。
▲２▼ ゴムタイヤを備えた車輪を有するトラッククレーンをそのまま履帯走行装置に搭載、固定してキャタピラ式クレーンを構成するので、従来、各部を解体して輸送し作業現場で組み立てていたキャタピラ式クレーンが、履帯走行装置のみ別途輸送してトラッククレーンに装着すればよく、キャタピラ式クレーンが簡便、迅速に組み立てられる。
▲３▼ 履帯走行装置の装着が、トラッククレーンのアウトリガに固着された油圧ジャッキを使用してトラッククレーンの車体を持ち上げることによって行えるので、装着のために他の器具を必要とせず、作業現場で容易、迅速にできる。
▲４▼ トラッククレーンに履帯走行装置を装着することにより、移動式クレーンとしての車幅がトラッククレーンよりも増すとともに、履帯走行装置の重量によって移動式クレーンの重心がトラッククレーンの重心よりも低くなり、安定性が増大し、クレーン作業中の移動も可能になる。
▲５▼ トラッククレーンと履帯走行装置、履帯走行装置装着具とを備えておけば、トラッククレーンとキャタピラ式クレーンとに使い分けられ、トラッククレーンとキャタピラ式クレーンの両者を準備しておく必要がなくなるとともに、トラッククレーンの運用性も高まり、設備関係諸費用の軽減につながる。
【図面の簡単な説明】
【図１】本発明の実施例の概要を示す斜視図
【図２】本発明実施例の概略構成図
【図３】トラッククレーンに履帯走行装置を装着する実施例の構成図
【図４】履帯走行装置装着具の一実施例
【図５】従来のトラッククレーンの作業時の設置状況を示す説明図
【符号の説明】
１：車台に車輪と履帯を備えた移動式クレーン
１’：トラッククレーン
２：車輪
３：履帯走行装置
３’：履帯
４：履帯走行装置装着具
５：アウトリガ
６：ブーム
７：運転室
８：車台
９：油圧ジャッキ
４１：履帯走行装置装着具本体
４２：覆い蓋
４３：蝶番
４４：ロック機構
４５：装着ボルト用貫通孔
４６：アウトリガ受け溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile crane that has both speed and road operability and excellent operability at a work site, in which wheels and crawler belts are mounted on a chassis and either one of the wheels or crawler belts is grounded.
[0002]
[Prior art and problems to be solved by the invention]
There are two types of conventional mobile cranes, a truck crane that uses wheels and a caterpillar crane that uses crawler belts, and they have been used according to the application that suits each feature.
Truck cranes with wheels equipped with rubber tires are capable of high speed travel and are suitable for road travel, and can be easily and quickly moved to the work site, but if the gravity applied to each tire changes due to crane operation, Since the tires are irregularly deformed and become unstable, there is a problem that the work cannot be performed as it is. Furthermore, the vehicle width (chassis width) is also restricted for adapting to road travel, and the center of gravity is higher than that of a caterpillar crane, so there is a risk of overturning depending on how the crane is operated.
Therefore, the truck crane at the work site has a total of four outriggers 5 stored in two places before and after the chassis 8 as shown in the explanatory view showing the installation state of the conventional truck crane in FIG. Are pulled out to the left and right sides of the chassis 8 of the truck crane 1 ′, and the truck crane 1 ′ is lifted by the hydraulic jacks 9 attached to the tips of the respective outriggers 5 so that gravity is not applied to the wheels 2. In addition, by pulling out the outrigger 5, the apparent vehicle width of the truck crane 1 ′ is widened to prevent rollover.
However, this measure can only be used if the location of the hydraulic jack 9 as a fulcrum is a solid ground, so the installation location of the truck crane 1 'is restricted and the installation location cannot be moved during crane operation. There were difficulties.
[0003]
On the other hand, a caterpillar crane equipped with a crawler traveling device has a low traveling speed and is not suitable for road driving, and it is difficult to move to the work site by itself, so it is necessary to disassemble it into main parts and load it on a truck or trailer. There is.
However, since the distance between the left and right crawler belts is wide and the steel crawler belt traveling device is provided, the traveling device itself is heavy, and the position of the center of gravity is lower than that of the truck crane 1 ′. In addition, it is possible to easily move, change direction and rotate on the spot by driving the left and right crawler belts, and is superior in operability on the work site as compared with the truck crane.
[0004]
An object of the present invention is to provide a mobile crane having the advantages of the truck crane 1 ′ and the caterpillar crane, that is, a mobile crane that can be quickly moved to a work site and has excellent operability at the work site. To provide a crane.
[0005]
[Means for Solving the Problems]
The present inventor has solved the above problems by the following means. (1) A pair of left and right crawler traveling devices are detachably attached to the truck crane, and the mobile device includes a wheel and a crawler track on which one of the track crane wheel and the crawler belt of the crawler traveling device is grounded. In the crane,
Mounting the pair of left and right crawler travel device to the truck crane, the is detachably mounted in a bolt into skeleton of the crawler traveling device, it is secured to the distal end near the end of the outrigger drawn equipped on the truck cranes made by the track device attachment, fulfillment band device attachment is attached, and one or two or more bolt through holes for the precursor detachably mounted in bolts of the crawler traveling device, said outrigger on top is inserted A mobile crane provided with a wheel and a crawler on a chassis, comprising an outrigger receiving groove and a cover lid having a mechanism for fixing a crawler traveling device attachment to the outrigger.
[0006]
( 2 ) When the crawler traveling device is mounted on the truck crane, after lifting the vehicle body of the truck crane by a hydraulic jack fixed to the tip of the outrigger of the truck crane, a pair of left and right crawler traveling devices are provided below the track crane. , The hydraulic pressure of the hydraulic jack is loosened, the truck crane body is gradually lowered, and the vicinity of the tip of the outrigger is inserted into the outrigger receiving groove of the crawler belt traveling device mounting tool. A mobile crane comprising wheels and crawler belts on the chassis described in (1 ) above.
(3) Operation of the crawler traveling apparatus, said characterized in that made possible by connecting the steering device that is provided on the hydraulic motor and said track crane crawler traveling device by a hydraulic hose (1) or (2 ) Mobile crane with wheels and crawler belts.
( 4 ) The mobile crane provided with a wheel and a crawler on a chassis according to any one of the above (1) to ( 3 ), characterized in that a traveling control device for a wheel and a crawler is provided in the cab.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings of the embodiments.
1 is a perspective view showing an outline of an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the embodiment of the present invention, FIG. 3 is a configuration diagram of an embodiment in which a crawler traveling device is mounted on a truck crane, and FIG. FIG. 5A is a side view, FIG. 5B is a front view, and FIG. 5C is a top view of an embodiment of the apparatus mounting tool, and FIG. 5 is an explanatory view showing an installation state during operation of a conventional truck crane.
In the figure, 1 is a mobile crane having wheels and crawlers on a chassis of the present invention, 1 'is a truck crane, 2 is a wheel, 3 is a crawler traveling device, 3' is a crawler belt, 4 is a crawler traveling device mounting tool, 5 is an outrigger, 6 is a boom, 7 is a driver's cab, 8 is a chassis, 9 is a hydraulic jack, 41 is a crawler travel device mounting body, 42 is a cover lid, 43 is a hinge, 44 is a locking mechanism, and 45 is a mounting bolt The through hole 46 is an outrigger receiving groove.
[0008]
A mobile crane 1 having wheels and crawler belts in a chassis according to the present invention is configured such that wheels 2 and crawler belts 3 'are mounted on a chassis 8 and either one of the wheels 2 or the crawler belts 3' is grounded. A mobile crane 1 having wheels and crawler belts on a chassis shown in a perspective view showing an outline of the embodiment of the present invention in FIG. 1 is a truck crane 1 ′ having wheels with rubber tires (see FIG. 3, hereinafter). Similarly, the crawler belt traveling device 3 that travels by driving the crawler belt 3 ′ is detachably mounted.
Then, the mounting of the pair of left and right crawler travel device 3 in the mobile crane 1 of the present invention, a crawler traveling apparatus mounting device 4 on the skeleton of the crawler traveling device 3 is detachably mounted in the bolt, the track crane It is made fixed in the vicinity of the front end portion of the outrigger 5 which is mounted on 1 ′ and pulled out.
[0009]
The perspective view showing the outline of the embodiment of the present invention in FIG. 1 and the schematic configuration diagram of the embodiment of the present invention in FIG. 2 are one of the embodiments of the mobile crane 1 having wheels and crawler tracks on the chassis of the present invention. is there.
Mobile crane 1 shown in FIGS. 1 and 2, track crane (1 ') track the vicinity of the tip portion of the outrigger 5 (see FIG. 3), mounted with bolts to the skeleton of the crawler traveling device 3 a pair of left and right The truck crane (1 ′) is operated by a hydraulic hose (not shown) through a hydraulic hose (not shown). It is configured to be supplied from the apparatus and operated.
The mobile crane 1 having wheels and crawlers on the chassis of the present embodiment is moved to the work site, that is, road travel is performed by the wheels 2 equipped with rubber tires as a truck crane, and the separately transported crawler travel device 3 is used as the work site. Can be used as a caterpillar crane.
[0010]
Hereinafter, the configuration and operation of this embodiment will be described according to the procedure for mounting the crawler belt traveling device 3 on the truck crane (1 ′) at the work site.
Normally, the truck crane 1 ′ shown in the configuration diagram of the embodiment in which the crawler traveling device is mounted on the truck crane of FIG. 3 is composed of the wheel 2, the outrigger 5, the boom 6, the cab 7 and the chassis 8, and the outrigger. 4 are arranged in the vicinity of the front and rear terminals of the chassis 8 of the truck crane 1 'so that the left and right sides of the vehicle body can be pulled out, respectively, and a hydraulic jack 9 is fixed to each end thereof.
The truck crane 1 ′ arriving at the work site is mounted with the crawler track traveling device 3 in a solid ground location.
The crawler traveling device 3 is mounted on the truck crane 1 ′ by pulling out the respective outriggers 5 of the truck crane 1 ′ to the left and right of the chassis 8, and the vehicle body of the truck crane 1 ′ by a hydraulic jack 9 fixed to the tip of the outrigger 5. And a pair of left and right crawler belt traveling devices 3 are inserted underneath.
Incidentally, before and after the skeleton of the crawler traveling device 3, as seen in FIG. 3, previously fixed in advance crawler traveling apparatus mounting device 4 with bolts.
[0011]
Then, the crawler traveling device 3, wherein said crawler traveling unit mounting device 4 is fixed by bolts, as described above, was inserted under the chassis 8 of the truck crane 1 'lifted vehicle body by a hydraulic jack 9, and then The hydraulic jack 9 is operated, the hydraulic pressure of the hydraulic jack 9 is loosened, the vehicle body of the truck crane 1 'is gradually lowered, and the vicinity of the tip of the outrigger 5 is inserted into the outrigger receiving groove 46 of the crawler travel device mounting tool body 41. .
After the outrigger 5 is inserted into the outrigger receiving groove 46, the cover lid 42 of the crawler belt travel device mounting tool 4 is closed, the lock mechanism 44 (see FIG. 4) is locked, and the crawler belt travel device mounting device 4 is fixed to the outrigger 5. . This completes the mounting of the truck crane 1 'to the crawler travel device 3.
In addition, it is preferable to attach the crawler belt traveling device mounting tool 4 on both the left and right sides of the crawler belt traveling device 3 so as to increase the strength.
[0012]
FIG. 4 shows an embodiment of the crawler belt traveling device mounting tool, where (a) is a side view, (b) is a front view, and (c) is a top view.
Since the length of the chassis of the crawler belt traveling device 3 is generally shorter than the length of the chassis 8 of the truck crane 1 ′, the side surface of the crawler belt traveling device mounting tool 4 is formed in an L-shape. In the vicinity of the front end of the horizontal arm portion of the mounting tool body 41, one or a plurality of mounting bolt through holes 45 through which a bolt for fixing the crawler traveling apparatus mounting tool 4 to the housing of the crawler traveling apparatus 3 is drilled. An outrigger receiving groove 46 for receiving the outrigger 5 is cut out in the upper part of the arm portion. Further, a cover lid 42 that can be opened and closed by a hinge or the like is mounted on the upper portion of the vertical arm portion of the crawler belt traveling apparatus mounting tool main body 41. In addition, the free end of the cover lid 42 is provided with a lock mechanism for locking the crawler belt traveling device mounting tool 4 to the outrigger 5 by locking the lid.
[0013]
The crawler belt traveling device 3 is driven by a hydraulic motor. Therefore, it is preferable to connect the hydraulic motor of the crawler travel device 3 to the hydraulic pump and the control device of the track crane 1 ′ with a hydraulic hose after the track crane 1 ′ is mounted on the crawler travel device 3. Moreover, if the control device of the crawler belt traveling device 3 is disposed in the cab 7 of the truck crane 1 ′, the operability is good.
The crawler belt traveling device mounting tool 4 described above is merely an example, and any device having a shape and strength capable of mounting the truck crane 1 ′ on the crawler belt traveling device 3 may be used.
[0014]
【The invention's effect】
The following effects can be exhibited by the present invention.
(1) By mounting wheels and crawler belts on the chassis and either one of the wheels or crawler belts being installed, it combines both speed in road driving and excellent operability at the work site. A mobile crane can be realized.
(2) Since a track crane having wheels with rubber tires is mounted on a crawler traveling device as it is and a caterpillar crane is configured, a caterpillar crane that has been disassembled and transported and assembled at the work site is conventionally used. Only the crawler travel device needs to be transported separately and mounted on the truck crane, and the caterpillar crane can be assembled easily and quickly.
(3) Since the crawler traveling device can be installed by lifting the truck crane body using a hydraulic jack fixed to the outrigger of the truck crane, no other equipment is required for installation. Easy and quick.
(4) By attaching the crawler traveling device to the truck crane, the width of the mobile crane will be larger than that of the truck crane, and the center of gravity of the mobile crane will be lower than that of the truck crane due to the weight of the crawler traveling device. , Stability is increased and movement during crane work is also possible.
(5) If a truck crane, crawler traveling device, and crawler traveling device mounting tool are provided, the truck crane and the caterpillar crane can be used properly, and it is not necessary to prepare both the truck crane and the caterpillar crane. In addition, the operability of truck cranes will increase, leading to a reduction in equipment-related costs.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of an embodiment of the present invention. FIG. 3 is a configuration diagram of an embodiment in which a track traveling device is mounted on a truck crane. Example of traveling device mounting tool [FIG. 5] Explanatory diagram showing the installation status of a conventional truck crane during work [Explanation of symbols]
1: Mobile crane 1 ′ having wheels and crawlers on the chassis: Truck crane 2: Wheel 3: Crawler travel device 3 ′: Crawler track 4: Crawler travel device mounting tool 5: Outrigger 6: Boom 7: Driver's cab 8: Vehicle chassis 9: Hydraulic jack 41: Crawler travel device mounting tool body 42: Cover lid 43: Hinge 44: Lock mechanism 45: Mounting bolt through hole 46: Outrigger receiving groove

Claims

In a mobile crane equipped with a pair of crawler traveling devices on the left and right sides of the track crane so as to be attachable and detachable, and one of the tracks of the track crane and the crawler track of the crawler traveling device is grounded and travels.
Mounting the pair of left and right crawler travel device to the truck crane, the is detachably mounted in a bolt into skeleton of the crawler traveling device, it is secured to the distal end near the end of the outrigger drawn equipped on the truck cranes made by the track device attachment, fulfillment band device attachment is attached, and one or two or more bolt through holes for the precursor detachably mounted in bolts of the crawler traveling device, said outrigger on top is inserted A mobile crane provided with a wheel and a crawler on a chassis, comprising an outrigger receiving groove and a cover lid having a mechanism for fixing a crawler traveling device attachment to the outrigger.

In order to attach the crawler track traveling device to the truck crane, after lifting the truck crane body by a hydraulic jack fixed to the tip of the outrigger of the track crane, a pair of left and right crawler track travel devices are inserted under the track crane. The hydraulic jack of the hydraulic jack is loosened, the truck crane body is gradually lowered, and the vicinity of the tip of the outrigger is inserted into the outrigger receiving groove of the crawler belt traveling device mounting tool. A mobile crane comprising wheels and crawler tracks on the chassis described in 1.

The chassis according to claim 1 or 2, wherein the crawler traveling device can be operated by connecting a hydraulic motor of the crawler traveling device and a control device mounted on the truck crane by a hydraulic hose. A mobile crane with wheels and tracks.

The mobile crane provided with a wheel and a crawler on a chassis according to any one of claims 1 to 3, comprising a wheel and a crawler traveling control device in the cab.