JPH0634437Y2 - Concrete filling counterweight - Google Patents

Concrete filling counterweight

Info

Publication number
JPH0634437Y2
JPH0634437Y2 JP1987121514U JP12151487U JPH0634437Y2 JP H0634437 Y2 JPH0634437 Y2 JP H0634437Y2 JP 1987121514 U JP1987121514 U JP 1987121514U JP 12151487 U JP12151487 U JP 12151487U JP H0634437 Y2 JPH0634437 Y2 JP H0634437Y2
Authority
JP
Japan
Prior art keywords
concrete
box
counterweight
internal pressure
cover
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
Application number
JP1987121514U
Other languages
Japanese (ja)
Other versions
JPS6428462U (en
Inventor
慶二 木村
源弘 中山
三郎 野上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP1987121514U priority Critical patent/JPH0634437Y2/en
Publication of JPS6428462U publication Critical patent/JPS6428462U/ja
Application granted granted Critical
Publication of JPH0634437Y2 publication Critical patent/JPH0634437Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Component Parts Of Construction Machinery (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) この考案はパワーショベル等の建設機械に用いられるカ
ウンタウエイトに係り、特に板金構成で作られたボック
ス内に重量コンクリートを充填したカウンタウエイトに
関するものである。
[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a counterweight used in a construction machine such as a power shovel, and more particularly to a counterweight in which a box made of sheet metal is filled with heavy concrete. Is.

(従来の技術) 第4図に示したようなパワーショベル等の建設機械に用
いられるカウンタウエイトは低コストで製作するため
に、第5図で示したように、予め板金溶接で形成された
ボックスaに、セメント、鉱石、鉄屑等を混合して比重
を高めた重量コンクリートbを流し込んだ上に完全密閉
するというような工程で製作されている。
(Prior Art) As shown in FIG. 5, a counterweight used for a construction machine such as a power shovel as shown in FIG. 4 is a box formed in advance by sheet metal welding in order to manufacture at low cost. It is manufactured by a process in which cement, ore, iron scrap, and the like are mixed in a, heavy concrete b having a higher specific gravity is poured, and then completely sealed.

そして特に量産性を高めるために、予め量産されたボッ
クスに、次々に生コンクリートが流し込まれ、コンクリ
ートが乾燥硬化する前に投入口が塞がれてカウンタウエ
イトwとして完成する。
Then, in order to particularly improve mass productivity, green concrete is successively poured into previously mass-produced boxes, and the charging port is closed before the concrete dries and hardens to complete the counterweight w.

cはカバーを示す。c shows a cover.

(考案が解決しようとする問題点) そしてコンクリートの養生過程としては第6図に示した
ように、生コンクリートの湿潤状態では膨張し、乾燥硬
化に従って逆に収縮する。
(Problems to be solved by the invention) In the concrete curing process, as shown in FIG. 6, the concrete expands in a wet state and conversely contracts as it dries and hardens.

この湿潤時の膨張は、通常100〜200×10-6といわれてお
り、この間密閉状態におくと内圧は非常に上昇する。
It is said that the expansion when wet is usually 100 to 200 × 10 −6, and if it is kept closed during this time, the internal pressure rises extremely.

この内圧は約0.5Kg/cm2で通常カバーである上板に約10
トンの力が加わることになる。
This internal pressure is about 0.5 Kg / cm 2 , and about 10 is applied to the upper plate that is usually the cover.
Ton's power will be added.

従ってボックスを構成している溶接部には大きな集中応
力が加わり、第5図に示したようにキレツ等が発生す
る。
Therefore, a large concentrated stress is applied to the welded portion that constitutes the box, and as shown in FIG.

なおカウンタウエイトの内部の充填材の膨らみを防止す
るようにしたものとしては、本出願前の出願で本出願後
に公開された実願昭61−40524号(実開昭62−154057
号)がある。
As a means for preventing the swelling of the filling material inside the counterweight, Japanese Patent Application No. 61-40524 (Japanese Utility Model Application No. 62-154057), which was published in the application before this application, was published after this application.
No.)

この考案はカウンタウエイトの膨らみ防止とカバー類の
取付を兼用させたものであるが、通気孔は常時外気と連
通しているため、完全密閉ではなく、空気の流通があっ
て内部の錆の発生や変形等を生じることは免れない。
This device is designed to prevent the counterweight from swelling and to attach covers, but since the ventilation holes are always in communication with the outside air, there is air circulation instead of complete sealing, and rust inside occurs. It is inevitable that it will be deformed or deformed.

この考案は上記不具合を解決することをその目的とす
る。
The purpose of this invention is to solve the above problems.

(問題点を解決するための手段及び作用) この考案は上記の点に鑑みなされたものであって、ボッ
クス内に生コンクリートを流し込む時にボックス内の上
部に形成される上部空気室に対峙する位置において、上
部ボックス側壁に内圧除去用の小孔を穿孔して成り、生
コンクリートの湿潤時の内圧上昇をなくしたことによ
り、コンクリートの乾燥硬化を待たずにコンクリート投
入口をカバーで塞ぐようにし、製品完成時には小孔を盲
栓で塞いたもので、ボックスにキレツが発生するような
ことを全く解消したものである。
(Means and Actions for Solving Problems) The present invention has been made in view of the above points, and is a position facing the upper air chamber formed in the upper part of the box when pouring fresh concrete into the box. In, in the upper box side wall, a small hole for internal pressure removal is drilled, by eliminating the increase in internal pressure when the fresh concrete is wet, it is possible to close the concrete input port with a cover without waiting for the dry hardening of the concrete, When the product was completed, the small holes were closed with blind plugs, which completely eliminated the occurrence of cracks in the box.

(実施例) 以下にこの考案の実施例を図面に基づいて説明する。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

第1図はその要部の概略を示した斜視図であり、図にお
いて1はカウンタウエイトである。
FIG. 1 is a perspective view showing the outline of the main part thereof, in which 1 is a counterweight.

2はボックスで、このボックスのコンクリート取入口3
より生コンクリート(生コン)4をボックス2内に流し
込む。
2 is a box, and the concrete intake 3 of this box
Fresh concrete (green concrete) 4 is poured into the box 2.

5はボックス2の側壁にボックスの上部近くにおいて設
けた内圧除去用の小孔であって、ボックス2の上部にあ
る空気室7に対峙する位置に設けられる。
Reference numeral 5 denotes a small hole for removing the internal pressure provided on the side wall of the box 2 near the upper part of the box, and is provided at a position facing the air chamber 7 at the upper part of the box 2.

6はカバーである。6 is a cover.

このように内圧除去用の小孔5を設けてあって、生コン
4の湿潤時の内圧上昇もないので、通常生コン4の乾燥
硬化に1週間内外を要するのに、この考案ではコンクリ
ートの乾燥硬化を待つことなく、従来と同様に生コン4
を流し込んだ直後にカバー6によってコンクリート投入
口3を塞いでも内圧が上昇するというような問題がなく
なる。
Since the small holes 5 for removing the internal pressure are provided in this way and the internal pressure does not rise when the ready-mixed concrete 4 is wet, it usually takes 1 week to dry and harden the ready-mixed concrete 4. Without waiting for, ready-mixed concrete 4 as before
Even if the concrete input port 3 is closed by the cover 6 immediately after pouring, the problem that the internal pressure rises is eliminated.

従ってボックスにキレツが発生するようなことがなくな
って、信頼性のあるカウンタウエイトの量産が可能とな
る。
Therefore, the box is free from cracks, and reliable counterweight can be mass-produced.

そして製品完成時には小孔5を盲栓8で塞いであり、コ
ンクリートが完全に乾燥硬化するカウンタウエイトの車
体搭載取付時には雨水の浸入による内部錆も防止でき、
コンクリートの次後の膨らみ防止にも役立つものであ
る。
When the product is completed, the small hole 5 is closed with a blind plug 8, and internal rust due to infiltration of rainwater can be prevented when mounting the counterweight on the vehicle body where concrete is completely dried and hardened.
It also helps prevent bulging of concrete.

(考案の効果) この考案は以上詳述したようにしてなり、つまりボック
ス側壁に予め内圧除去用の小孔を穿設してあるので、生
コン湿潤時の内圧上昇がなくなり、従ってコンクリート
の乾燥硬化を待たずにカバーによりコンクリート投入口
を塞いでもなんら問題がないため、ボックスにキレツが
発生するようなことがなくなり信頼性の高いカウンタウ
エイトの量産ができる。
(Effect of the Invention) This invention is as described in detail above, that is, since the small hole for removing the internal pressure is pre-drilled in the side wall of the box, the internal pressure does not rise when the ready-mixed concrete is wet, so that the concrete is dried and hardened. Since there is no problem even if the concrete input port is closed by the cover without waiting, there is no chance of crevices in the box, and reliable mass production of counterweight can be performed.

このようにこの考案によればカウンタウエイトの膨らみ
防止を安価に実施できると共に、カウンタウエイトの完
品時には小孔を盲栓で詰めてあるため、雨水の浸入によ
る内部錆や、コンクリートの事後の膨張による膨らみを
防止できる。
As described above, according to this invention, the counterweight can be prevented from bulging at a low cost, and when the counterweight is completed, the small holes are closed with blind plugs, so internal rust due to infiltration of rainwater and expansion of the concrete after the fact. Swelling due to can be prevented.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの考案の一実施例のカウンタウエイトの斜視
図、第2図は第1図のII−II断面図、第3図は第2図の
P部の拡大図、第4図(a),(b)はこの考案のカウ
ンタウエイトを装着するパワーショベルの上面図と側面
図、第5図は従来例のカウンタウエイト、第6図はコン
クリートの湿潤乾燥と膨張収縮の関係を説明するグラフ
である。 1……カウンタウエイト 2……ボックス 3……コンクリート投入口 4……生コンクリート 5……内圧除去用小孔 6……カバー 7……空気室 8……盲栓
FIG. 1 is a perspective view of a counterweight according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is an enlarged view of a portion P of FIG. 2, and FIG. ) And (b) are a top view and a side view of a power shovel to which the counterweight according to the present invention is attached, FIG. 5 is a counterweight of a conventional example, and FIG. 6 is a graph for explaining the relationship between wet-drying and expansion / contraction of concrete. Is. 1 ... Counterweight 2 ... Box 3 ... Concrete inlet 4 ... Green concrete 5 ... Small hole for removing internal pressure 6 ... Cover 7 ... Air chamber 8 ... Blind stopper

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】ボックス2内に生コンクリート4を流し込
む際にボックス2内の上部に形成される上部空気室7に
対峙する位置において、上記ボックス側壁に内圧除去用
の小孔5を穿設して、コンクリートの乾燥硬化を待たず
にコンクリート投入口3をカバーにより塞ぐようにし、
製品完成時には小孔5を盲栓8で塞いだことを特徴とす
るコンクリート充填カウンタウエイト。
1. A small hole 5 for removing internal pressure is formed in a side wall of the box at a position facing an upper air chamber 7 formed in an upper part of the box 2 when pouring fresh concrete 4 into the box 2. To cover the concrete inlet 3 with a cover without waiting for the concrete to dry and harden.
A concrete-filled counterweight characterized in that the small hole 5 is closed with a blind plug 8 when the product is completed.
JP1987121514U 1987-08-10 1987-08-10 Concrete filling counterweight Expired - Lifetime JPH0634437Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987121514U JPH0634437Y2 (en) 1987-08-10 1987-08-10 Concrete filling counterweight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987121514U JPH0634437Y2 (en) 1987-08-10 1987-08-10 Concrete filling counterweight

Publications (2)

Publication Number Publication Date
JPS6428462U JPS6428462U (en) 1989-02-20
JPH0634437Y2 true JPH0634437Y2 (en) 1994-09-07

Family

ID=31368587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987121514U Expired - Lifetime JPH0634437Y2 (en) 1987-08-10 1987-08-10 Concrete filling counterweight

Country Status (1)

Country Link
JP (1) JPH0634437Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009142243A1 (en) * 2008-05-23 2009-11-26 太平洋セメント株式会社 Counter weight
KR101319596B1 (en) * 2013-05-21 2013-10-16 주식회사 에스틸 Charging type for tower crane counterweight to guide the construction equipment to be supplied to the wire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007186878A (en) * 2006-01-12 2007-07-26 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Counterweight structure of construction machinery

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH057324Y2 (en) * 1986-03-18 1993-02-24

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009142243A1 (en) * 2008-05-23 2009-11-26 太平洋セメント株式会社 Counter weight
CN102036931A (en) * 2008-05-23 2011-04-27 太平洋水泥株式会社 Counter weight
JP5130359B2 (en) * 2008-05-23 2013-01-30 太平洋セメント株式会社 Counter weight
US8523226B2 (en) 2008-05-23 2013-09-03 Komatsu Ltd. Counterweight
KR101319596B1 (en) * 2013-05-21 2013-10-16 주식회사 에스틸 Charging type for tower crane counterweight to guide the construction equipment to be supplied to the wire

Also Published As

Publication number Publication date
JPS6428462U (en) 1989-02-20

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