JPH072490A - Counter weight device for construction machine - Google Patents
Counter weight device for construction machineInfo
- Publication number
- JPH072490A JPH072490A JP5169790A JP16979093A JPH072490A JP H072490 A JPH072490 A JP H072490A JP 5169790 A JP5169790 A JP 5169790A JP 16979093 A JP16979093 A JP 16979093A JP H072490 A JPH072490 A JP H072490A
- Authority
- JP
- Japan
- Prior art keywords
- counterweight
- mounting bolt
- main frame
- nut
- counter weight
- 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.)
- Pending
Links
Landscapes
- Jib Cranes (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、建設機械の旋回体の
後部に設置するカウンタウエイト装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight device installed at the rear of a revolving structure of a construction machine.
【0002】[0002]
【従来の技術】図4はクローラクレーンの本体を示す側
面図で、無限軌道式の走行体1の上部には、旋回体2が
旋回輪を介して旋回自在に装架されており、旋回体2の
後部には、カウンタウエイト3が設置されている。2. Description of the Related Art FIG. 4 is a side view showing a main body of a crawler crane. A revolving structure 2 is rotatably mounted on a traveling body 1 of an endless track type by means of revolving wheels. A counterweight 3 is installed at the rear of the unit 2.
【0003】つぎに、鉛直方向に取付けボルトを挿入し
てカウンタウエイト3を旋回体2の主フレームに締結す
る従来のカウンタウエイト装置を、図4ないし図6を参
照して説明する。Next, a conventional counterweight device for fastening the counterweight 3 to the main frame of the revolving unit 2 by inserting a mounting bolt in the vertical direction will be described with reference to FIGS. 4 to 6.
【0004】旋回体2の主フレーム2aとカウンタウエ
イト3にはボルト穴が鉛直方向に設けられており、取付
けボルト4はその頭部が上方となる向きで、回り止め5
の穴、カウンタウエイト3および主フレーム2aのボル
ト穴に挿入されている。主フレーム2aから突出した取
付けボルト4のねじ部には、平座金6、ばね座7、ナッ
ト8がはめ込まれている。すなわち、ナット8を締付け
ることにより、カウンタウエイト3が主フレーム2aに
締結される。Bolt holes are provided in the main frame 2a of the revolving structure 2 and the counterweight 3 in the vertical direction.
Are inserted into the holes, the counterweight 3, and the bolt holes of the main frame 2a. A flat washer 6, a spring seat 7, and a nut 8 are fitted into the threaded portion of the mounting bolt 4 protruding from the main frame 2a. That is, by tightening the nut 8, the counterweight 3 is fastened to the main frame 2a.
【0005】[0005]
【発明が解決しようとする課題】カウンタウエイト3は
基本的には取付けボルト4とナット8とで主フレーム2
aに締結されるゆえ、締付け力を保持させるためには、
取付けボルト4のねじ部は多少ともナット8から突出さ
せる必要がある。さらに、カウンタウエイト3はその枠
を溶接板構造としたもの、鋳物製としたもの等があり、
いずれにしてもカウンタウエイト3の高さ寸法の公差は
大きくなる傾向もあり、取付けボルト4の長さをある程
度余裕を持たせておく必要がある。よって、カウンタウ
エイト3の製作状況によるが、取付けボルト4のねじ部
はナット8から突出することが多い。したがって、カウ
ンタウエイト3の下面の地上高さすれすれの障害物があ
るような作業場所で旋回等の操作を行なうと、ナット8
から突出した取付けボルト4のねじ部が障害物に当って
破損する不都合が生じる。ねじ部が破損すると、ナット
8のかじりが起きたり、カウンタウエイト3の締結が不
可能になったりすることもある。The counterweight 3 is basically composed of a mounting bolt 4 and a nut 8 for the main frame 2.
Since it is fastened to a, in order to maintain the tightening force,
It is necessary that the threaded portion of the mounting bolt 4 protrudes from the nut 8 to some extent. Further, the counterweight 3 includes a frame having a welding plate structure, a frame made of casting, and the like.
In any case, the tolerance of the height dimension of the counterweight 3 tends to be large, and it is necessary to allow the length of the mounting bolt 4 to have some margin. Therefore, depending on the manufacturing conditions of the counterweight 3, the threaded portion of the mounting bolt 4 often projects from the nut 8. Therefore, when an operation such as turning is performed in a work place where there is an obstacle that is slipping above the ground level of the lower surface of the counterweight 3, the nut 8
This causes a problem that the threaded portion of the mounting bolt 4 protruding from the contact with an obstacle may be damaged. If the screw portion is damaged, the nut 8 may be galled or the counterweight 3 may not be fastened.
【0006】また、カウンタウエイト3を固定させる場
合、作業者はナット8を取付けボルト4のねじ部の先端
にまずねじ込みを行なうが、大体は地面とカウンタウエ
イト3の下面との距離は人の身長程はないため、作業者
の作業姿勢が悪くなり、ねじ込みばかりに注意するため
に、他の取付けボルト4の突出部は軽視され、最悪の場
合、作業者の頭がそのねじ部に当たり、怪我を招くおそ
れもある。すなわち、作業者に作業の不安感を与える原
因の一つとなる。Further, when fixing the counterweight 3, the operator first screws the nut 8 into the tip of the threaded portion of the mounting bolt 4, but the distance between the ground and the lower surface of the counterweight 3 is generally about the person's height. Since the work posture of the worker is poor, the protrusion of the other mounting bolt 4 is neglected in order to pay attention only to screwing in, and in the worst case, the worker's head hits the screw portion to cause injury. There is also a risk of being invited. That is, it is one of the causes for giving the worker a feeling of anxiety about work.
【0007】この発明は、前記の難点を容易に除くこと
ができるカウンタウエイト装置を提供することを目的と
する。An object of the present invention is to provide a counterweight device which can easily eliminate the above-mentioned drawbacks.
【0008】[0008]
【課題を解決するための手段】この発明のカウンタウエ
イト装置は、旋回体の主フレームの後部に設置したカウ
ンタウエイトを、カウンタウエイトと主フレームに鉛直
方向に挿入した取付けボルトおよび取付けボルトのねじ
部にはめ込んだナットで主フレームに締結する建設機械
のカウンタウエイト装置において、カウンタウエイト下
面のボルト穴部のまわりに、取付けボルトのねじ部の先
端およびナットがカウンタウエイト内におさまる深さの
座ぐりを設けたことを特徴とする。SUMMARY OF THE INVENTION A counterweight device of the present invention is a mounting bolt in which a counterweight installed in the rear portion of a main frame of a revolving structure is vertically inserted into the counterweight and the main frame, and a screw portion of the mounting bolt. In a counterweight device for construction machinery that is fastened to the main frame with a nut that is fitted into the main frame, provide a counterbore with a depth that allows the tip of the mounting bolt thread and the nut to fit inside the counterweight around the bolt hole on the bottom surface of the counterweight. It is characterized by being provided.
【0009】[0009]
【作用】取付けボルトのねじ部の先端部はカウンタウエ
イトに保護されるので、破損を防止できる。The tip of the threaded portion of the mounting bolt is protected by the counterweight, so damage can be prevented.
【0010】[0010]
【実施例】以下、この発明の一実施例を図1ないし図3
により説明する。それらの図において、図4ないし図6
と同じ構成要素は同じ符号で示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described. In these figures, FIGS.
The same components as those are indicated by the same reference numerals.
【0011】カウンタウエイト3の下面位置は、主フレ
ーム2aから突出した取付けボルト4のねじ部の先端よ
り低位置に設定されている。カウンタウエイト3のボル
ト穴の周辺部には、座ぐり3aが設けられている。図1
に示すように、カウンタウエイト3を主フレーム2aに
締結した取付けボルト4のねじ部の先端部およびナット
8は、カウンタウエイト3の内部におさまっている。座
ぐり3aの大きさ、形状は任意でよいが、少なくともナ
ット8の締付け工具がはいり、かつ、カウンタウエイト
3単体を地面等に置いた時、すわり性が悪くならないよ
うに考慮する必要がある。また、座ぐり3aの深さは、
取付けボルト4のねじ部の先端よりカウンタウエイト3
の下面が低くなるように設定すればよい。The lower surface position of the counterweight 3 is set lower than the tip of the threaded portion of the mounting bolt 4 protruding from the main frame 2a. A counterbore 3a is provided around the bolt hole of the counterweight 3. Figure 1
As shown in, the tip end of the threaded portion of the mounting bolt 4 and the nut 8 that fasten the counterweight 3 to the main frame 2 a are set inside the counterweight 3. The size and shape of the spot facing 3a may be arbitrary, but it is necessary to take into consideration that at least the tightening tool for the nut 8 is inserted and the sitting property is not deteriorated when the counterweight 3 alone is placed on the ground or the like. The depth of the spot facing 3a is
Counterweight 3 from the tip of the thread of the mounting bolt 4
It may be set so that the lower surface of is low.
【0012】なお、取付けボルト4の頭部を下にして、
主フレーム2aの下面に回り止め5を当て、主フレーム
2a、カウンタウエイト3のボルト穴に取付けボルト4
を通し、カウンタウエイト3の上面で平座金6、ばね座
金7を取付けてナット8で締結すれば、取付けボルト4
のねじ部はカウンタウエイト3の上側となり、その損傷
を防止できることになるが、取付けボルト4とナット8
との締付け作業はカウンタウエイト3上での作業とな
り、高トルクで締付けなければならないことを考える
と、作業空間が狭く、高所作業となり、危険が伴なうこ
の手段は一般的でない。In addition, with the head of the mounting bolt 4 facing down,
Apply a detent 5 to the lower surface of the main frame 2a, and attach the bolts 4 to the bolt holes of the main frame 2a and the counterweight 3.
Through the top of the counterweight 3, attach the plain washer 6 and the spring washer 7 and fasten them with the nut 8.
The threaded portion of the counter weight is on the upper side of the counterweight 3 so that the damage can be prevented.
Considering that the tightening work with and is performed on the counterweight 3 and the tightening must be performed with a high torque, the work space is narrow, the work is performed at a high place, and this means involving danger is not common.
【0013】[0013]
【発明の効果】以上説明したこの発明によれば、取付け
ボルトのねじ部の先端部はカウンタウエイトにより保護
されるゆえ損傷を防止でき、また、締付け工具によりナ
ットの締付けを行なう時、作業者の頭と取付けボルトの
先端部との衝突を避けるとができる。かつ、取付けボル
トの突出部をかくすことで、手元作業者の不安感を除く
ことができるとともに、建設機械の意匠的美観を上げる
ことができる。According to the present invention described above, since the tip end of the threaded portion of the mounting bolt is protected by the counterweight, damage can be prevented, and when the nut is tightened by the tightening tool, It is possible to avoid a collision between the head and the tip of the mounting bolt. In addition, by hiding the protruding portion of the mounting bolt, it is possible to eliminate the anxiety of the operator at hand and improve the design aesthetics of the construction machine.
【図1】この発明の一実施例を示す断面図、FIG. 1 is a sectional view showing an embodiment of the present invention,
【図2】図1のカウンタウエイトをA−A線から見た底
面図、FIG. 2 is a bottom view of the counterweight shown in FIG. 1 taken along line AA,
【図3】図2のB−B断面図、3 is a sectional view taken along line BB of FIG.
【図4】従来のクローラクレーンの本体を示す側面図、FIG. 4 is a side view showing a main body of a conventional crawler crane,
【図5】図4のC−C線から見た平面図、5 is a plan view seen from the line CC of FIG. 4,
【図6】従来のカウンタウエイト装置を示す断面側面図
である。FIG. 6 is a cross-sectional side view showing a conventional counterweight device.
2 旋回体 2a 主フレーム 3 カウンタウエイト 3a 座ぐり 4 取付けボルト 5 回り止め 6 平座金 7 ばね座 8 ナット 2 Revolving structure 2a Main frame 3 Counterweight 3a Counterbore 4 Mounting bolt 5 Anti-rotation 6 Plain washer 7 Spring washer 8 Nut
Claims (1)
ウンタウエイトを、カウンタウエイトと主フレームに鉛
直方向に挿入した取付けボルトおよび取付けボルトのね
じ部にはめ込んだナットで主フレームに締結する建設機
械のカウンタウエイト装置において、カウンタウエイト
下面のボルト穴部のまわりに、取付けボルトのねじ部の
先端およびナットがカウンタウエイト内におさまる深さ
の座ぐりを設けたことを特徴とするカウンタウエイト装
置。1. A construction machine in which a counterweight installed at a rear portion of a main frame of a revolving structure is fastened to the mainframe by a mounting bolt vertically inserted into the counterweight and the main frame and a nut fitted into a thread portion of the mounting bolt. In the counterweight device, the counterweight device is provided around the bolt hole on the lower surface of the counterweight with a counterbore having a depth such that the tip of the threaded portion of the mounting bolt and the nut can be accommodated in the counterweight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5169790A JPH072490A (en) | 1993-06-17 | 1993-06-17 | Counter weight device for construction machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5169790A JPH072490A (en) | 1993-06-17 | 1993-06-17 | Counter weight device for construction machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH072490A true JPH072490A (en) | 1995-01-06 |
Family
ID=15892936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5169790A Pending JPH072490A (en) | 1993-06-17 | 1993-06-17 | Counter weight device for construction machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH072490A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3333328A1 (en) * | 2016-12-09 | 2018-06-13 | Liebherr-Hydraulikbagger GmbH | Work machine with a ballast device |
-
1993
- 1993-06-17 JP JP5169790A patent/JPH072490A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3333328A1 (en) * | 2016-12-09 | 2018-06-13 | Liebherr-Hydraulikbagger GmbH | Work machine with a ballast device |
DE102016014659A1 (en) * | 2016-12-09 | 2018-06-14 | Liebherr-Hydraulikbagger Gmbh | Working machine with a ballast device |
US20180163370A1 (en) * | 2016-12-09 | 2018-06-14 | Liebherr-Hydraulikbagger Gmbh | Work machine having a ballast device |
US11242670B2 (en) | 2016-12-09 | 2022-02-08 | Liebherr-Hydraulikbagger Gmbh | Work machine having a ballast device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6554341B2 (en) | Fender panel impact absorption structure of vehicle having pedestrian protection function | |
CA1240657A (en) | Vertically adjustable, shock-absorbing mounting device | |
JP2006336455A (en) | Operator protective structure mounted on cab of construction machine | |
US20050110265A1 (en) | Structure for disposing fuel tank for straddle-type vehicle | |
MY114482A (en) | Marine fender with structure for fixing pad to fender frame | |
JPH072490A (en) | Counter weight device for construction machine | |
KR0165910B1 (en) | Frame cover structure for motor scooter type vehicle | |
JP2001151487A (en) | Weight mounting structure in counter balance type forklift | |
JPH11189154A (en) | Fixing device of cowl cover for vehicle underfloor apparatus | |
JP3651305B2 (en) | Plate rotation prevention structure | |
JPH0732354Y2 (en) | Under guard attachment device for construction truck dump trucks | |
JPH09209407A (en) | Fitting method of counterweight | |
JP2548731Y2 (en) | Protector | |
JPS6343167Y2 (en) | ||
JP2806506B2 (en) | Protector mounting structure | |
KR900008016Y1 (en) | Impact wrench with apparatus to fix a nut | |
JPH0441018Y2 (en) | ||
JPH088914Y2 (en) | Knee protector fixing structure | |
JP2563329Y2 (en) | Mounting structure of lower arm bracket in vehicle | |
JPS60169302A (en) | Caster device | |
JPS6347161Y2 (en) | ||
JPH031291Y2 (en) | ||
JP3264860B2 (en) | Vehicle steps | |
JPH057085Y2 (en) | ||
JPH0724290Y2 (en) | Front bumper mounting structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |