JPH09278373A - Jib connecting device for mobile crane - Google Patents
Jib connecting device for mobile craneInfo
- Publication number
- JPH09278373A JPH09278373A JP11819996A JP11819996A JPH09278373A JP H09278373 A JPH09278373 A JP H09278373A JP 11819996 A JP11819996 A JP 11819996A JP 11819996 A JP11819996 A JP 11819996A JP H09278373 A JPH09278373 A JP H09278373A
- Authority
- JP
- Japan
- Prior art keywords
- jib
- screw rod
- pin
- boom
- connecting pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Jib Cranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、移動式クレーンの
ジブ連結装置に係わり、特に、ブームの側面に格納した
ジブを前方に張り出した後に、ブームとジブとを連結す
る移動式クレーンのジブ連結装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jib connecting device for a mobile crane, and more particularly to a jib connecting device for a mobile crane that connects a boom and a jib after a jib stored on a side surface of a boom is forwardly extended. Regarding the device.
【０００２】[0002]
【従来の技術】図７は移動式クレーンの一例を示す側面
図であり、車両５０に搭載された旋回台５１にはブーム
シリンダ５２により起伏される伸縮可能なブーム５３が
装着されている。移動式クレーンは一般に継ぎ足し用の
ジブ５４を備えており、走行時にはブーム５３の側面に
ジブ５４を並列に格納している。図８はブーム５３の平
面図であり、その側面にジブ５４を格納した状態を示し
ている。即ち、ブーム５３の先端部の一側はピン５５に
より回動自在に枢着されており、クレーン作業時にはジ
ブ５４をピン５５を中心としてブーム５３の前方に張り
出したのち、ブーム５３の先端部の他側のブラケット５
６ａとジブ５４の基端部の他側のブラケット５７ａとを
ピン５８で連結して使用するようになっている。このブ
ーム５３とジブ５４との連結装置の一例としては、実公
昭４６−１０８３２に提案されたものがある。2. Description of the Related Art FIG. 7 is a side view showing an example of a mobile crane, in which a swivel base 51 mounted on a vehicle 50 is equipped with an extendable and retractable boom 53 which is erected by a boom cylinder 52. The mobile crane is generally provided with a jib 54 for extension, and the jib 54 is stored in parallel on the side surface of the boom 53 during traveling. FIG. 8 is a plan view of the boom 53, showing a state in which the jib 54 is stored on the side surface thereof. That is, one end of the boom 53 is rotatably pivoted by a pin 55, and during crane work, the jib 54 is extended to the front of the boom 53 around the pin 55, and then the tip of the boom 53 is fixed. Bracket 5 on the other side
6a and the bracket 57a on the other side of the base end of the jib 54 are connected by a pin 58 for use. An example of a connecting device for connecting the boom 53 and the jib 54 is the one proposed in Japanese Utility Model Publication No. 46-10832.
【０００３】図９は実公昭４６−１０８３２に提案され
た連結装置の側面断面図であり、ブーム５３の先端部に
設けられた上下一対のブラケット５６ａ、５６ｂと、ジ
ブ５４の基端部に設けられた上下一対のブラケット５７
ａ、５７ｂとをピン５８ａ、５８ｂにより連結した状態
を示している。ピン５８ａ、５８ｂはそれぞれ端部に逆
方向のめねじ５９ａ、５９ｂを有しており、両端に逆方
向のおねじ６０ａ、６０ｂを有するねじ棒６１と係合し
ている。また、ピン５８ａ、５８ｂの側面にはそれぞれ
キー溝６２ａ、６２ｂが設けられており、図１０に示す
図９のＣ−Ｃ断面に示すように、このキー溝６２ａ、６
２ｂはブラケット５６ａ、５６ｂに取着されたボルト６
３、６３の先端部と係合していて回転しないようになっ
ている。FIG. 9 is a side sectional view of a connecting device proposed in Japanese Utility Model Publication No. 46-10832, which shows a pair of upper and lower brackets 56a and 56b provided at the tip of the boom 53 and a base end of the jib 54. A pair of upper and lower brackets 57
The state where a and 57b are connected by pins 58a and 58b is shown. The pins 58a and 58b have female threads 59a and 59b in opposite directions at their ends, respectively, and are engaged with a screw rod 61 having male threads 60a and 60b in opposite directions at both ends. Further, key grooves 62a and 62b are provided on the side surfaces of the pins 58a and 58b, respectively, and as shown in the CC cross section of FIG. 9 shown in FIG.
2b is a bolt 6 attached to the brackets 56a and 56b
It is engaged with the tip portions of 3, 63 so as not to rotate.
【０００４】ねじ棒６１の一端には係合部６４が設けら
れており、操作棒６５の先端と係合するようになってお
り、操作棒６５によりネジ棒６１を回転することにより
ピン５８ａ、５８ｂは上下方向に移動する。ブーム５３
とジブ５４とを連結する場合には操作棒６５によりネジ
棒６１を回転させ、ピン５８ａ、５８ｂを外向きに移動
させて連結する。このとき、ピン５８ａ、５８ｂの先端
をブラケット５７ａ、５７ｂの端面に固設したプレート
６６ａ、６６ｂに当接させ、位置決めする。ブーム５３
とジブ５４との連結を解除する場合にはピン５８ａ、５
８ｂを細い２点鎖線に示すように内向きに移動させて連
結解除する。このとき、キー溝６２ａ、６２ｂの端部６
７ａ、６７ｂをボルト６３、６３の先端部に当接させ、
ピン５８ａ、５８ｂの位置決めをする。An engaging portion 64 is provided at one end of the screw rod 61 so as to engage with the tip of the operating rod 65. By rotating the screw rod 61 by the operating rod 65, the pin 58a, 58b moves up and down. Boom 53
When connecting the jib 54 with the jib 54, the screw rod 61 is rotated by the operating rod 65, and the pins 58a and 58b are moved outward to be connected. At this time, the tips of the pins 58a and 58b are brought into contact with the plates 66a and 66b fixed to the end surfaces of the brackets 57a and 57b to position them. Boom 53
When releasing the connection between the jib 54 and the jib 54, the pins 58a, 5
8b is moved inward as shown by the thin chain double-dashed line to release the connection. At this time, the end portions 6 of the key grooves 62a and 62b are
7a, 67b are brought into contact with the tips of the bolts 63, 63,
The pins 58a and 58b are positioned.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記構
成においては、ピン５８ａ、５８ｂにキー溝６２ａ、６
２ｂを設けたためにピン５８ａ、５８ｂの強度が低下
し、径を太くする必要があり、キー溝加工とともにコス
トの増大をもたらす。また、ブラケット５６ａ、５６ｂ
に取着したボルト６３、６３の先端部をキー溝６２ａ、
６２ｂに係合するように、位置のずれがないように加工
することは困難である。また、ボルト６３、６３の円筒
部とキー溝とを係合させピンの回転を防止しているた
め、面圧が大きくなり摩耗する。また、ピンの上下方向
の移動はボルト６３、６３の円筒部とキー溝との線接触
により案内しているためピンが滑らかに上下移動しない
という問題がある。However, in the above structure, the key grooves 62a, 6 are formed in the pins 58a, 58b.
Since the pin 2a is provided, the strength of the pins 58a and 58b is reduced, and it is necessary to make the diameter large, which results in an increase in cost along with the key groove processing. Also, the brackets 56a and 56b
Attach the bolts 63, 63 attached to to the key grooves 62a,
It is difficult to process so as to engage with 62b without any positional deviation. Further, since the cylindrical portions of the bolts 63, 63 are engaged with the key groove to prevent the pin from rotating, the surface pressure increases and wear occurs. Further, since the vertical movement of the pin is guided by the line contact between the cylindrical portions of the bolts 63 and 63 and the key groove, there is a problem that the pin does not move smoothly in the vertical direction.
【０００６】本発明は上記の問題点に着目してなされた
もので、ピン強度を低下させることなく、また、加工も
容易な移動式クレーンのジブ連結装置を提供することを
目的としている。The present invention has been made in view of the above problems, and an object of the present invention is to provide a jib connecting device for a mobile crane that does not reduce the pin strength and is easy to process.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明に係る移動式クレーンのシブ連結装置にお
いては、ブームの側面に格納したジブをブームの前方に
張り出し、ブームの先端部のブラケットとジブの基端部
のブラケットとを係合させた後、ねじ棒の両端部に螺合
したそれぞれの連結ピンをねじ棒の回転により上下方向
に拡張してブームとジブとを連結する移動式クレーンの
ジブ連結装置において、前記連結ピンに固設され、か
つ、前記連結ピンの回動を規制する連結ピン回動規制部
材と、前記ジブの基端部のブラケットに固設され、前記
連結ピン回動規制部材に係合し、かつ、前記連結ピンを
長手方向に摺動可能にガイドするガイド部材とを備えた
構成としている。In order to achieve the above-mentioned object, in the mobile crane sib coupling device according to the present invention, the jib stored in the side surface of the boom is extended to the front of the boom, and the tip portion of the boom is extended. After the bracket and the bracket at the base end of the jib are engaged, each connecting pin screwed on both ends of the screw rod is expanded in the vertical direction by the rotation of the screw rod to connect the boom and the jib. In a jib connecting device for a mobile crane, a connecting pin rotation restricting member fixed to the connecting pin and restricting rotation of the connecting pin, and fixed to a bracket at a base end of the jib, And a guide member that engages with the connecting pin rotation restricting member and guides the connecting pin so as to be slidable in the longitudinal direction.
【０００８】また、前記ガイド部材は、連結ピンの長手
方向の摺動距離を規制する位置決めストッパを有する構
成としている。Further, the guide member has a positioning stopper for regulating the sliding distance of the connecting pin in the longitudinal direction.
【０００９】さらに、前記ねじ棒に付設され、ねじ棒の
回動を規制するねじ棒回動規制部材と、前記ガイド部材
に着脱自在で、かつ、取着時に前記ねじ棒回動規制部材
に当接し、ねじ棒の回動を停止させる係合ピンとを備え
た構成としている。Further, a screw rod rotation restricting member which is attached to the screw rod and restricts the rotation of the screw rod, and which is detachably attached to the guide member and which contacts the screw rod rotation restricting member at the time of mounting. And an engaging pin that contacts and stops the rotation of the screw rod.
【００１０】[0010]
【作用】上記のような構成としたため、ねじ棒を回転す
ることにより連結ピンはそれに付設した連結ピン回動規
制部材とともにブラケットに固設したガイド部材にガイ
ドされて上下方向に摺動し、位置決めストッパにより所
定の位置で停止し、ブームとジブとを連結または連結解
除する。回動規制部材は連結ピンの外側に固着している
ためピンの強度が維持できるるとともに、回転中心より
離れた所で回転を規制しているため受ける回転トルクは
小さくなる。また、回動規制部材は所定の幅を有してい
るため面圧を小さくでき、耐磨耗性が向上する。また、
面圧が低いため連結ピンの上下の移動が滑らかになる。
また、連結あるいは連結解除状態において、ガイド部材
に係合ピンを取着することにより、ねじ棒に付設された
ねじ棒回動規制部材が係合ピンに当接し、ねじ棒の回動
を停止し、連結ピンの長手方向の移動を停止させること
ができる。With the above-described structure, by rotating the screw rod, the connecting pin slides in the vertical direction by being guided by the guide member fixed to the bracket together with the connecting pin rotation restricting member attached to the connecting pin for positioning. The stopper stops at a predetermined position to connect or disconnect the boom and jib. Since the rotation restricting member is fixed to the outside of the connecting pin, the strength of the pin can be maintained, and the rotation torque received is small because the rotation is restricted at a position away from the center of rotation. Further, since the rotation restricting member has a predetermined width, it is possible to reduce the surface pressure and improve the wear resistance. Also,
Since the surface pressure is low, the vertical movement of the connecting pin is smooth.
Further, when the engaging pin is attached to the guide member in the connected or unconnected state, the screw rod rotation restricting member attached to the screw rod comes into contact with the engaging pin to stop the rotation of the screw rod. The movement of the connecting pin in the longitudinal direction can be stopped.
【００１１】[0011]
【発明の実施の形態および実施例】以下に本発明に係る
移動式クレーンのジブ連結装置の実施例について、図面
を参照して詳述する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a jib connecting device for a mobile crane according to the present invention will be described in detail below with reference to the drawings.
【００１２】図１はジブ連結装置の側面断面図で、ブー
ムとジブとを連結した状態を示しており、図２は連結装
置の部品構成を示す斜視図である。上下一対のブームブ
ラケット１ａ、１ｂには上下一対の二股ジブブラケット
２ａ、２ｂが係合している。二股ジブブラケット２ａ、
２ｂのそれぞれの上下には連結ピン１０ａ、１０ｂ用の
穴を有する外側ボス３ａ、３ｂおよび内側ボス４ａ、４
ｂが固着されている。内側ボス４ａ、４ｂにはそれぞれ
位置決めストッパ５ａ、５ｂを有するガイド部材６ａ、
６ｂが固設されている。ガイド部材６ａ、６ｂの先端に
はそれぞれ係合ピン２０を挿入する穴７、７を有するブ
ラケット８、８が固設されている。FIG. 1 is a side sectional view of a jib connecting device, showing a state in which a boom and a jib are connected, and FIG. 2 is a perspective view showing a component structure of the connecting device. A pair of upper and lower bifurcated jib brackets 2a and 2b are engaged with the pair of upper and lower boom brackets 1a and 1b. Bifurcated jib bracket 2a,
Outer bosses 3a, 3b and inner bosses 4a, 4 having holes for connecting pins 10a, 10b respectively above and below 2b.
b is fixed. Guide members 6a having positioning stoppers 5a and 5b on the inner bosses 4a and 4b,
6b is fixed. Brackets 8 and 8 having holes 7 and 7 into which the engaging pins 20 are inserted are fixedly provided at the tips of the guide members 6a and 6b, respectively.
【００１３】二股ジブブラケット２ａの外側ボス３ａ、
内側ボス４ａおよびブームブラケット１ａには連結ピン
１０ａが嵌入されており、二股ジブブラケット２ｂの外
側ボス３ｂ、内側ボス４ｂおよびブームブラケット１ｂ
には連結ピン１０ｂが嵌入されていてブームブラケット
１ａ、１ｂと二股ジブブラケット２ａ、２ｂとを連結し
ている。連結ピン１０ａと１０ｂには逆方向のめねじ１
１ａ、１１ｂが設けられているおり、ねじ棒１２の両端
に設けられた逆方向のおねじ１３ａ、１３ｂに係合して
いる。The outer boss 3a of the bifurcated jib bracket 2a,
The connecting pin 10a is fitted in the inner boss 4a and the boom bracket 1a, and the outer boss 3b, the inner boss 4b, and the boom bracket 1b of the bifurcated jib bracket 2b.
A connecting pin 10b is fitted in to connect the boom brackets 1a and 1b to the bifurcated jib brackets 2a and 2b. Female screws 1 in opposite directions are provided on the connecting pins 10a and 10b.
1a and 11b are provided and engage with male threads 13a and 13b in opposite directions provided at both ends of the threaded rod 12.
【００１４】連結ピン１０ａ、１０ｂの先端部には、図
１および図１のＡ−Ａ断面図である図３に示すように、
それぞれ連結ピン回動規制部材１４ａ、１４ｂがボルト
１５、１５により締着されている。そして、連結ピン回
動規制部材１４ａ、１４ｂに設けられた溝１６ａ、１６
ｂはガイド部材６ａ、６ｂに係合しており、連結ピン１
０ａ、１０ｂの回り止めをしているとともに、連結ピン
１０ａ、１０ｂが軸方向に移動する場合のガイドとなっ
ている。また、図１に示すように、連結状態においては
連結ピン１０ａ、１０ｂの連結ピン回動規制部材１４
ａ、１４ｂは、それぞれ二股ジブブラケット２ａ、２ｂ
の内側ボス４ａ、４ｂの端面に当接して位置決めされて
いる。As shown in FIG. 1 and FIG. 3, which is a sectional view taken along the line AA of FIG. 1, at the tips of the connecting pins 10a and 10b,
The connecting pin rotation restricting members 14a and 14b are fastened by bolts 15 and 15, respectively. Then, the grooves 16a and 16 provided in the connecting pin rotation restricting members 14a and 14b.
b is engaged with the guide members 6a and 6b, and the connecting pin 1
It serves as a guide when the connecting pins 10a, 10b move in the axial direction, while preventing the 0a, 10b from rotating. Further, as shown in FIG. 1, in the connected state, the connecting pin rotation restricting member 14 of the connecting pins 10a and 10b.
a and 14b are bifurcated jib brackets 2a and 2b, respectively.
The inner bosses 4a and 4b are positioned in contact with the end surfaces of the inner bosses 4a and 4b.
【００１５】ねじ棒１２の中央部にはねじ棒回動規制部
材１７が設けられており、図１のＢ−Ｂ断面図である図
４に示すように、ガイド部材６ａ、６ｂのブラケット
８、８の穴７、７に挿入された係合ピン２０に当接して
ねじ棒１２の回動を停止するようになっている。ねじ棒
１２の下端部には操作棒と係合する係合部１８が設けら
れている。係合ピン２０は上部にピン２１を有してお
り、穴７に挿入したときに抜け落ちないようになってい
る。係合ピン２０はブラケット８に着脱自在であり、取
着時には下端に止めピン２２を取着して外れ止めとして
いる。A screw rod rotation restricting member 17 is provided at the center of the screw rod 12, and as shown in FIG. 4 which is a sectional view taken along the line BB of FIG. 1, the brackets 8 of the guide members 6a, 6b, The rotation of the screw rod 12 is stopped by coming into contact with the engagement pin 20 inserted into the holes 7 of 7. An engaging portion 18 that engages with the operating rod is provided at the lower end of the screw rod 12. The engagement pin 20 has a pin 21 on the upper part so that it does not fall off when it is inserted into the hole 7. The engagement pin 20 is detachable from the bracket 8, and a retaining pin 22 is attached to the lower end of the bracket 8 to prevent it from coming off.
【００１６】つぎに、ブームブラケット１ａ、１ｂと二
股ジブブラケット２ａ、２ｂとの連結を解除する作業手
順について説明する。まず、図５に示すように係合ピン
２０を取り外す。つぎに、ねじ棒１２の下端部に設けら
れた係合部１８に操作棒３０を係合させて回転する。連
結ピン１０ａ、１０ｂはガイド部材６ａ、６ｂにガイド
されながら長手方向に互いに接近するように移動する。Next, a work procedure for releasing the connection between the boom brackets 1a and 1b and the forked jib brackets 2a and 2b will be described. First, as shown in FIG. 5, the engagement pin 20 is removed. Next, the operating rod 30 is engaged with the engaging portion 18 provided at the lower end of the screw rod 12 to rotate. The connecting pins 10a and 10b move so as to approach each other in the longitudinal direction while being guided by the guide members 6a and 6b.
【００１７】更に操作棒３０によりねじ棒１２を回転さ
せて連結ピン１０ａ、１０ｂを長手方向に互いに接近す
るように移動させ、図６に示すように連結ピン１０ａ、
１０ｂの連結ピン回動規制部材１４ａ、１４ｂがガイド
部材６ａ、６ｂの位置決めストッパ５ａ、５ｂに当接す
ると連結ピン１０ａ、１０ｂは連結解除状態となる。最
後に係合ピン２０を取着して、ねじ棒１２のねじ棒回動
規制部材１７と当接させて回り止めをし、作業を完了す
る。Further, the screw rod 12 is rotated by the operating rod 30 to move the connecting pins 10a and 10b so as to approach each other in the longitudinal direction, and as shown in FIG.
When the connecting pin rotation restricting members 14a, 14b of the connecting member 10b come into contact with the positioning stoppers 5a, 5b of the guide members 6a, 6b, the connecting pins 10a, 10b are released from the connecting state. Finally, the engagement pin 20 is attached and brought into contact with the screw rod rotation restricting member 17 of the screw rod 12 to prevent rotation, and the work is completed.
【００１８】連結解除の状態からブームブラケット１
ａ、１ｂと二股ジブブラケット２ａ、２ｂとを連結する
場合には、上述の作業手順を逆に行えばよいので説明は
省略する。From the uncoupled state, the boom bracket 1
When connecting the a and 1b and the bifurcated jib brackets 2a and 2b, the above-described work procedure may be performed in reverse, and thus the description thereof will be omitted.
【００１９】[0019]
【発明の効果】本発明に係る移動式クレーンのジブ連結
装置は、以上詳述したような構成としたため、連結ピン
に溝を設ける必要はなく、強度が低下する恐れはない。
したがって連結ピンの直径を細くすることが可能とな
り、小型化およびコストの低減が可能となる。また、ブ
ラケットのボスに対する特別な加工も必要とせず、加工
も容易でコストを低減できる。Since the jib connecting device for a mobile crane according to the present invention has the structure described in detail above, it is not necessary to form a groove in the connecting pin, and there is no fear that the strength will decrease.
Therefore, the diameter of the connecting pin can be reduced, and the size and cost can be reduced. Further, no special processing is required for the boss of the bracket, and the processing is easy and the cost can be reduced.
【図１】本発明に係るジブ連結装置の連結状態を示す側
面断面図である。FIG. 1 is a side sectional view showing a connected state of a jib connecting device according to the present invention.
【図２】ジブ連結装置の構成を示す斜視図である。FIG. 2 is a perspective view showing a configuration of a jib connecting device.
【図３】図１のＡ−Ａ断面図であり、連結ピンのガイド
部を示す平面図である。3 is a cross-sectional view taken along the line AA of FIG. 1, and is a plan view showing a guide portion of the connecting pin.
【図４】図１のＢ−Ｂ断面図であり、ねじ棒の回り止め
状況を示す平面図である。FIG. 4 is a cross-sectional view taken along the line BB in FIG. 1 and is a plan view showing a rotation stop state of the screw rod.
【図５】本発明に係るジブ連結装置の連結途中の状態を
示す側面断面図である。FIG. 5 is a side cross-sectional view showing a state in which the jib connecting device according to the present invention is being connected.
【図６】同、連結解除の状態を示す側面断面図である。FIG. 6 is a side cross-sectional view showing a state in which the connection is released.
【図７】移動式クレーンの側面図である。FIG. 7 is a side view of the mobile crane.
【図８】ブームの側面にジブを格納したときの状態を示
す平面図である。FIG. 8 is a plan view showing a state in which the jib is stored on the side surface of the boom.
【図９】従来のジブ連結装置の側面断面図である。FIG. 9 is a side sectional view of a conventional jib coupling device.
【図１０】図９のＣ−Ｃ断面図であり、連結ピンガイド
部を示す平面断面図である。10 is a cross-sectional view taken along line CC of FIG. 9, and is a plan cross-sectional view showing a connecting pin guide portion.
１ａ，１ｂ ブームブラケット ２ａ，２ｂ 二股ジブブラケット ３ａ，３ｂ 外側ボス ４ａ，４ｂ 内側ボス ５ａ，５ｂ ストッパ ６ａ，６ｂ ガイド部材 ８ ブラケット １０ａ，１０ｂ 連結ピン １１ａ，１１ｂ 逆方向めねじ １２ ねじ棒 １３ａ，１３ｂ 逆方向おねじ １４ａ，１４ｂ 連結ピン回動規制部材 １６ａ，１６ｂ 溝 １７ ねじ棒回動規制部材 １８ 係合部 ２０ 係合ピン ２２ 止めピン 1a, 1b Boom bracket 2a, 2b Bifurcated jib bracket 3a, 3b Outer boss 4a, 4b Inner boss 5a, 5b Stopper 6a, 6b Guide member 8 Bracket 10a, 10b Connecting pin 11a, 11b Reverse direction female thread 12 Screw rod 13a, 13b Reverse direction male screw 14a, 14b Connection pin rotation restricting member 16a, 16b Groove 17 Screw rod rotation restricting member 18 Engaging portion 20 Engaging pin 22 Stopping pin
Claims (3)
前方に張り出し、ブームの先端部のブラケットとジブの
基端部のブラケットとを係合させた後、ねじ棒の両端部
に螺合したそれぞれの連結ピンをねじ棒の回転により上
下方向に拡張してブームとジブとを連結する移動式クレ
ーンのジブ連結装置において、 前記連結ピンに固設され、かつ、前記連結ピンの回動を
規制する連結ピン回動規制部材と、前記ジブの基端部の
ブラケットに固設され、前記連結ピン回動規制部材に係
合し、かつ、前記連結ピンを長手方向に摺動可能にガイ
ドするガイド部材とを備えたことを特徴とする移動式ク
レーンのジブ連結装置。1. A jib stored on a side surface of a boom is projected toward the front of the boom, and after engaging a bracket at a tip portion of the boom with a bracket at a base end portion of the jib, the jib is screwed to both ends of the screw rod. A jib connecting device for a mobile crane, which expands each connecting pin in the vertical direction by rotation of a screw rod to connect a boom and a jib, wherein the connecting pin is fixed to the connecting pin and rotation of the connecting pin is restricted. And a guide fixed to the bracket at the base end portion of the jib, engaged with the connecting pin rotation restricting member, and guiding the connecting pin slidably in the longitudinal direction. A jib connecting device for a mobile crane, comprising: a member.
結装置において、前記ガイド部材は、連結ピンの長手方
向の摺動距離を規制する位置決めストッパを有すること
を特徴とする移動式クレーンのジブ連結装置。2. The jib connecting device for a mobile crane according to claim 1, wherein the guide member has a positioning stopper that regulates a sliding distance of the connecting pin in the longitudinal direction. Coupling device.
結装置において、前記ねじ棒に付設され、ねじ棒の回動
を規制するねじ棒回動規制部材と、前記ガイド部材に着
脱自在で、かつ、取着時に前記ねじ棒回動規制部材に当
接し、ねじ棒の回動を停止させる係合ピンとを備えたこ
とを特徴とする移動式クレーンのジブ連結装置。3. The jib connecting device for a mobile crane according to claim 1, wherein a screw rod rotation restricting member that is attached to the screw rod and restricts rotation of the screw rod, and is detachably attached to the guide member, A jib connecting device for a mobile crane, comprising: an engaging pin that abuts on the screw rod rotation restricting member at the time of attachment and stops rotation of the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11819996A JP3582751B2 (en) | 1996-04-17 | 1996-04-17 | Mobile crane jib linkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11819996A JP3582751B2 (en) | 1996-04-17 | 1996-04-17 | Mobile crane jib linkage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09278373A true JPH09278373A (en) | 1997-10-28 |
| JP3582751B2 JP3582751B2 (en) | 2004-10-27 |
Family
ID=14730641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11819996A Expired - Fee Related JP3582751B2 (en) | 1996-04-17 | 1996-04-17 | Mobile crane jib linkage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3582751B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003317A (en) * | 2013-02-21 | 2014-08-27 | 马尼托瓦克起重机有限责任公司 | Pin puller for crane connections |
| EP3366635A1 (en) * | 2017-02-24 | 2018-08-29 | Manitowoc Crane Group France SAS | Bolting device |
-
1996
- 1996-04-17 JP JP11819996A patent/JP3582751B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003317A (en) * | 2013-02-21 | 2014-08-27 | 马尼托瓦克起重机有限责任公司 | Pin puller for crane connections |
| EP2769954A1 (en) * | 2013-02-21 | 2014-08-27 | Manitowoc Crane Companies, LLC | Pin puller for crane connections |
| JP2014162646A (en) * | 2013-02-21 | 2014-09-08 | Manitowoc Crane Companies Llc | Pin puller for crane connections |
| US9815674B2 (en) | 2013-02-21 | 2017-11-14 | Manitowoc Crane Companies, Llc | Pin puller for crane connections |
| EP3366635A1 (en) * | 2017-02-24 | 2018-08-29 | Manitowoc Crane Group France SAS | Bolting device |
| US10717632B2 (en) | 2017-02-24 | 2020-07-21 | Manitowoc Crane Group France Sas | Bolting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3582751B2 (en) | 2004-10-27 |
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