JPH0752151Y2 - Sheave device in boom extender - Google Patents
Sheave device in boom extenderInfo
- Publication number
- JPH0752151Y2 JPH0752151Y2 JP8548890U JP8548890U JPH0752151Y2 JP H0752151 Y2 JPH0752151 Y2 JP H0752151Y2 JP 8548890 U JP8548890 U JP 8548890U JP 8548890 U JP8548890 U JP 8548890U JP H0752151 Y2 JPH0752151 Y2 JP H0752151Y2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- sheave
- rope
- extension
- equalizer
- 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.)
- Expired - Lifetime
Links
Landscapes
- Jib Cranes (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） この考案は移動式クレーン車等の荷役車両における３段
以上の伸縮式ブームのシーブ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a sheave device for a telescopic boom having three or more stages in a cargo handling vehicle such as a mobile crane.
（従来の技術） 従来の移動式クレーン車の外観側面図を第２図に示す。
図においてａは下部車体,bは上部車体であって，上部車
体ｂはｃ−ｃを旋回中心として旋回自在になっており,d
はブーム装置,eは起伏シリンダで，ブーム装置ｄは起伏
シリンダｅによって上下に起伏するようになっている。(Prior Art) An external side view of a conventional mobile crane is shown in FIG.
In the figure, a is a lower vehicle body, b is an upper vehicle body, and the upper vehicle body b is rotatable around cc as a center of rotation, and d
Is a boom device, e is a hoisting cylinder, and the boom device d is hoisted up and down by a hoisting cylinder e.
第３図及び第４図は従来の３段の伸縮式ブーム装置の作
動説明図であって，伸縮シリンダｆは１端が第２ブーム
ｇに取付けられ，他端は第３ブームｈに取付けられてい
る。FIGS. 3 and 4 are operation explanatory views of a conventional three-stage telescopic boom device. One end of the telescopic cylinder f is attached to the second boom g and the other end is attached to the third boom h. ing.
伸縮シリンダｆへの油圧はホースリールｉにより供給さ
れる。ホースリールｉからの油圧ホースは第２ブームｇ
に取付けたローラBjと，第１ブームｋに取付けたローラ
Alによりブーム内へ導かれる。The hydraulic pressure to the telescopic cylinder f is supplied by the hose reel i. The hydraulic hose from the hose reel i is the second boom g.
Roller Bj mounted on and the roller mounted on the first boom k
Guided by Al into the boom.
第３図はブームを伸長させる場合を示し，伸長用ロープ
ｍを第１ブームｋのka点と第３ブームｈのkb点とに取付
け，第２ブームｇに取付けられた伸長用シーブｎを介す
るように構成することにより，伸縮シリンダｆが延伸す
ると第３ブームｈが第２ブームｇから抜け出ると同時に
第２ブームｇも第１ブームｋから抜け出す。FIG. 3 shows a case where the boom is extended. The extension rope m is attached to the ka point of the first boom k and the kb point of the third boom h, and the extension sheave n attached to the second boom g is used. With this configuration, when the telescopic cylinder f extends, the third boom h comes out of the second boom g and at the same time the second boom g comes out of the first boom k.
第４図はブームを収縮させる場合を示し，収縮用ロープ
ｐを第１ブームｋのkc点と第３ブームｋのkd点に取付
け，第２ブームｇに取付けられた収縮用シーブｑを介す
るように構成することにより，伸縮シリンダｆが縮むと
第３ブームｈが第２ブームｇへ格納される。ｒはフード
ピンである。FIG. 4 shows a case where the boom is retracted. The retracting rope p is attached to the kc point of the first boom k and the kd point of the third boom k so that the retracting sheave q is attached to the second boom g. With this configuration, when the telescopic cylinder f contracts, the third boom h is stored in the second boom g. r is a food pin.
（考案が解決しようとする課題） 上記従来の伸縮用シーブ，特に第3,及び４図における伸
長用シーブｎは第２ブームｇ内に配設されているので，
シーブ径を大きくすることができず，シーブ径を大きく
することによるロープの耐久性及び強度の向上を期待で
きなかった。(Problems to be Solved by the Invention) Since the conventional sheave for expansion and contraction, particularly the extension sheave n in FIGS. 3 and 4 are arranged in the second boom g,
It was not possible to increase the sheave diameter, and we could not expect to improve the durability and strength of the rope by increasing the sheave diameter.
（課題を解決するための手段及び作用） この考案は上記問題を解消するためになされたものであ
って，ロープの両端は車体に対し３段ブームの場合，第
１ブームに固定し，第２ブームに設けた２箇のシーブ
と，第３ブームに設けたイコライザシーブを介してお
り，上記第２ブームに設けた２箇のシーブは互いに段違
いであって水平，かつ該中心軸線が互いに異なる垂直線
であるように配設し，上記第３ブームに設けられたイコ
ライザシーブは水平面に対して斜めに配設することによ
り，シーブ径を最大限に大きくしてロープの耐久性，お
よび強度の向上をはかるものである。(Means and Actions for Solving the Problem) The present invention has been made to solve the above-mentioned problems. In the case where both ends of the rope are a three-stage boom with respect to the vehicle body, the rope is fixed to the first boom and the second boom is used. Through the two sheaves provided on the boom and the equalizer sheave provided on the third boom, the two sheaves provided on the second boom are staggered and horizontal, and the central axes are different from each other. The equalizer sheave provided on the third boom is arranged diagonally to the horizontal plane to maximize the sheave diameter and improve the durability and strength of the rope. Is to measure.
（実施例） 次にこの考案の実施例を図面に基づいて説明する。(Example) Next, the Example of this invention is described based on drawing.
第１図はこの考案による伸長用シーブ装置の一実施例の
要部説明用斜視図であって，第１ブーム１内を第２ブー
ム２が伸縮し，更に第２ブーム２内を第３ブーム３が伸
縮するようになっていて，第２ブーム２と第３ブーム３
との間に設けられた伸縮シリンダ（図示せず）によって
伸縮することは，上記第３図及び第４図において説明し
たのと同様である。そして第１図に示したこの実施例は
上記第３図及び第４図における伸長用シーブｎと，伸長
用ロープｍを第３ブームｈに固定する点hbとから成る伸
長用シーブ装置の改良に関するものであって，伸長用ワ
イヤ４は第１ブーム１に設けられたワイヤ固定端（図示
せず）から，第２ブーム２側面板に設けられた穴21を通
って第２ブーム２内へ入り第２ブーム２後端部に水平に
設けたシーブA5（回転中心軸線を51〜51で示す）を符号
“イ”で示す位置から，符号“ロ”で示す位置までほぼ
半周し，第３ブーム３後端部に水平に対して斜めに配設
したイコライザシーブ６（回転中心軸線を61〜61で示
す）の符号“ハ”で示す位置から，符号“ニ”で示す位
置までほぼ半周し，第２ブーム２に設けた，上記シーブ
A5と互いに段違いに水平でかつ回転中心軸線が互いに異
なる垂直線であるように配設したシーブB7（回転中心軸
線を71〜71で示す）を，符号“ホ”で示す位置から，符
号“ヘ”で示す位置までほぼ半周し，第２ブーム２側面
板に設けた穴22を通って，第１ブーム１に設けられたワ
イヤ固定端（図示せず）に達するものであり，“ロ”及
び“ハ”で示す２箇の位置，及び“ニ”及び“ホ”で示
す２箇の位置はそれぞれ第２ブーム２の底面からの高さ
がほぼ同一になるようにイコライザシーブ６が傾斜して
いるので，ブームの伸縮に対応してシーブが回転して
も，ワイヤ４がシーブ溝からはずれることが無いように
配設されているものである。FIG. 1 is a perspective view for explaining an essential part of an embodiment of the extension sheave device according to the present invention, in which the second boom 2 extends and contracts in the first boom 1 and further the third boom in the second boom 2. 3 is adapted to extend and contract, and the second boom 2 and the third boom 3
The expansion and contraction by the expansion and contraction cylinder (not shown) provided between and is similar to that described in FIGS. 3 and 4 above. This embodiment shown in FIG. 1 relates to an improvement of the extension sheave device including the extension sheave n shown in FIGS. 3 and 4 and a point hb for fixing the extension rope m to the third boom h. be one, elongated wire 4 wire fixed end disposed in the first boom 1 (not shown), to the second boom within 2 through the holes 2 1 provided in the second boom 2 side plates sieve A5 provided horizontally in the second boom 2 rear portion (indicating the rotation center in 5 1 to 5 1) from the position indicated by reference numeral "i" enters, approximately half to a position indicated by the symbol "b", from the position indicated by symbol "c" of the equalizer sheave 6 is disposed obliquely to the horizontal (the central axis of rotation is indicated by 61 through 65 1) to the third boom 3 rear portion, the position indicated by the symbol "d" The sheave, which was installed on the second boom 2 for about half a circle
Sheave B7 A5 mutually staggered horizontally in and the rotation center axis is arranged so as to be different vertical line each other (indicating the rotational center axis 7 1-7 1), from a position indicated by reference numeral "e", the code almost half to the position indicated by "f", through holes 2 2 provided on the second boom 2 side plates, which reach the wire fixing end provided on the first boom 1 (not shown), " The equalizer sheave 6 is set so that the heights from the bottom of the second boom 2 are substantially the same at the two positions indicated by "b" and "c" and the two positions indicated by "d" and "e", respectively. Since it is inclined, even if the sheave rotates in response to expansion and contraction of the boom, the wire 4 is arranged so as not to come off the sheave groove.
そして以上の説明はブーム伸長用シーブ装置に関するも
のであるが，ブーム収縮用シーブ装置に関しても同様に
この考案が適用されるものである。Although the above description relates to the boom extension sheave device, the present invention is similarly applied to the boom contraction sheave device.
（考案の効果） この考案は以上詳述したようにして成るので，ブーム伸
縮装置において第２ブーム内に配設されたシーブ径を許
容量最大限に大きくすることによりロープの耐久性及び
強度を大幅に向上することができるという大きい効果を
奏するものである。(Effect of the Invention) Since the present invention is configured as described above in detail, the durability and strength of the rope can be improved by maximizing the sheave diameter arranged in the second boom in the boom telescopic device to the maximum allowable amount. It has a great effect that it can be greatly improved.
第１図はこの考案による伸長用シーブ装置の一実施例の
要部説明用斜視図，第２図は従来の移動式クレーン車の
外観側面図，第３図及び第４図は従来の３段の伸縮式ブ
ーム装置の作動説明図である。 １……第１ブーム、２……第２ブーム 21,22……第２ブーム側面板の穴 ３……第３ブーム、４……伸長用ワイヤ ５……シーブＡ、６……イコライザシーブ ７……シーブＢFIG. 1 is a perspective view for explaining an essential part of an embodiment of an extension sheave device according to the present invention, FIG. 2 is an external side view of a conventional mobile crane, and FIGS. 3 and 4 are conventional three-stage. FIG. 3 is an operation explanatory view of the telescopic boom device of FIG. 1 ... 1st boom, 2 ... 2nd boom 2 1 , 2 2 ... hole of 2nd boom side plate 3 ... 3rd boom, 4 ... extension wire 5 ... sheave A, 6 ... equalizer Sheave 7 ... Sheave B
Claims (1)
伸縮装置において，ロープの両端は車体に対し３段ブー
ムの場合第１ブームに固定し，第２ブームに設けられた
２箇のシーブと，第３ブームに設けられたイコライザシ
ーブを介しているブーム伸縮装置であって，上記第２ブ
ームに設けられた２箇のシーブは互いに段違いに水平，
かつ該中心軸線が互いに異なる垂直線であるように配設
され，上記第３ブームに設けられたイコライザシーブ
は，水平面に対して斜めに配設されていることを特徴と
するブーム伸縮装置におけるシーブ装置。1. A boom telescopic device having three or more steps for extending and retracting using a rope, wherein both ends of the rope are fixed to a first boom in the case of a three-step boom with respect to a vehicle body, and two sheaves provided on the second boom. And a boom telescoping device via an equalizer sheave provided on the third boom, wherein the two sheaves provided on the second boom are stepwise horizontal to each other,
Further, the equalizer sheave provided on the third boom is arranged so that the central axes thereof are different vertical lines, and the equalizer sheave is provided obliquely to a horizontal plane. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8548890U JPH0752151Y2 (en) | 1990-08-14 | 1990-08-14 | Sheave device in boom extender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8548890U JPH0752151Y2 (en) | 1990-08-14 | 1990-08-14 | Sheave device in boom extender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0444281U JPH0444281U (en) | 1992-04-15 |
| JPH0752151Y2 true JPH0752151Y2 (en) | 1995-11-29 |
Family
ID=31816790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8548890U Expired - Lifetime JPH0752151Y2 (en) | 1990-08-14 | 1990-08-14 | Sheave device in boom extender |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752151Y2 (en) |
-
1990
- 1990-08-14 JP JP8548890U patent/JPH0752151Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0444281U (en) | 1992-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |