JPH0414502Y2 - - Google Patents
Info
- Publication number
- JPH0414502Y2 JPH0414502Y2 JP1985006662U JP666285U JPH0414502Y2 JP H0414502 Y2 JPH0414502 Y2 JP H0414502Y2 JP 1985006662 U JP1985006662 U JP 1985006662U JP 666285 U JP666285 U JP 666285U JP H0414502 Y2 JPH0414502 Y2 JP H0414502Y2
- Authority
- JP
- Japan
- Prior art keywords
- leader
- sheave
- rope
- center
- auger
- 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
Links
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、オーガ引抜荷重によるモーメントを
リーダに作用させない様にした杭打機のバツクテ
ンシヨン装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a back tension device for a pile driver that prevents the moment caused by the auger pull-out load from acting on the leader.
［従来の技術］
杭打機に於いてオーガを引抜く際には、大きな
引抜荷重が必要である。従つて、一般的にはオー
ガに掛回すワイヤロープの条数を多くして大きな
引抜荷重が得られる様にしている。この為リーダ
に関しオーガ側の鉛直荷重が増大し、リーダに大
きな曲げモーメントが発生する。従つて、リーダ
が前後に撓み、その撓みが実用範囲を超えて作業
不能を招き或は強度不足によつてリーダが損傷す
ることがあつた。[Prior Art] When pulling out an auger in a pile driver, a large pulling load is required. Therefore, generally, the number of wire ropes to be wound around the auger is increased to obtain a large pulling load. For this reason, the vertical load on the auger side with respect to the leader increases, and a large bending moment is generated in the leader. Therefore, the leader bends back and forth, and the bending exceeds the practical range, resulting in the inability to work or damage to the leader due to insufficient strength.
第２図は斯かる欠点を解消した杭打機のバツク
テンシヨン装置の１例を示すものである。 FIG. 2 shows an example of a back tension device for a pile driver that eliminates these drawbacks.
走行体１の前方に突出したフロントブラケツト
２にはリーダ３が立設され、このリーダ３はバツ
クステー４によつてリーダ３の鉛直状態が保持さ
れる。リーダ３の上端にはリーダトツプ５が傾動
自在に枢支されており、ウインチ６から繰出され
たワイヤロープ７は走行体１のシーブ８、リーダ
トツプ５のシーブ９，１０及びオーガ１１に掛回
した後リーダトツプ５に係着されている。ここで
該従来例ではリーダ３に関して前後の鉛直方向の
力を釣り合わす為、リーダトツプ５の走行体側と
フロントブラケツト２間にバツクテンシヨンロー
プ１２を張設し、該バツクテンシヨンロープ１２
に生じる張力により、リーダ３の前後の鉛直方向
の力が釣合う様にしている。 A leader 3 is erected on a front bracket 2 projecting forward of the traveling body 1, and the vertical state of the leader 3 is maintained by a backstay 4. A leader top 5 is rotatably supported at the upper end of the leader 3, and a wire rope 7 fed out from a winch 6 is wound around a sheave 8 of the traveling body 1, sheaves 9 and 10 of the leader top 5, and an auger 11. It is attached to the leader top 5. In this conventional example, in order to balance the vertical forces in the front and rear directions with respect to the leader 3, a back tension rope 12 is stretched between the running body side of the leader top 5 and the front bracket 2.
The vertical forces in the front and rear of the leader 3 are balanced by the tension generated in the leader 3.
［考案が解決しようとする問題点］
然し乍ら上記した従来例では、オーガの引抜荷
重を大きくしようとしてオーガ側のロープの条数
を多くすればする程バツクテンシヨンロープは太
くならざるえ得ず、又バツクテンシヨンロープを
太くするにも限度がある。更に、リーダトツプ５
よりリーダへの荷重伝達はリーダトツプ５の傾動
中心を介しての集中荷重となりリーダ３の剛性中
心より集中荷重の作用線がずれる場合はリーダ３
に曲げモーメントを発生させリーダ３の振動の原
因となるという問題を有している。[Problems to be solved by the invention] However, in the conventional example described above, the more the number of ropes on the auger side is increased in an attempt to increase the pull-out load of the auger, the thicker the back tension rope becomes. There is also a limit to how thick the back tension rope can be made. Furthermore, leader top 5
The load is transmitted to the leader through the center of tilting of the leader top 5, and if the line of action of the concentrated load deviates from the center of rigidity of the leader 3, the leader 3
This has a problem in that it generates a bending moment and causes vibration of the leader 3.
［問題点を解決するための手段］
本考案は上記した問題点を解決すべくなしたも
のであつて、フロントブラケツトのリーダより後
方位置に傾動自在な天秤杆を設け、該天秤杆の一
端と前後方向に張り出すように形成したリーダト
ツプの後端との間にバツクテンシヨンロープを張
設し、ウインチから繰出したロープを、フロント
ブラケツトに設けたシーブを介してリーダトツプ
のリーダ中心より後端側に設けたシーブに一旦掛
回した後、前記天秤杆の他端に設けたシーブに掛
回して再び前記リーダトツプのリーダ中心より後
端側に設けたシーブに掛回し、次いでリーダトツ
プの前端に設けたシーブとオーガに設けたシーブ
に掛回してリーダトツプに係着したものである。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes a take-up lever that is tiltable at a position rearward from the leader of the front bracket, and one end of the take-up rod. A back tension rope is stretched between the rear end of the leader top, which is formed to extend in the front-rear direction, and the rope fed out from the winch is passed through the sheave provided on the front bracket to the rear end side of the leader top from the leader center. Once it is hung around a sheave provided at the other end of the balance rod, it is hung again through a sheave provided at the rear end side of the leader center of the leader top, and then it is hung around a sheave provided at the front end of the leader top. It is hooked around the sheave and the sheave provided on the auger and attached to the leader top.
［作用］
前記した天秤杆のレバー比を適宜選択すること
により、リーダ中心に関するモーメントの釣合を
達することができ、且該釣合を達成する為リーダ
トツプは傾動する必要がないのでリーダに固定す
ることができ安定した作業状態を得ることが可能
となる。[Function] By appropriately selecting the lever ratio of the above-mentioned balance rod, it is possible to balance the moments about the center of the leader, and in order to achieve this balance, the leader top does not need to tilt, so it is fixed to the leader. This makes it possible to obtain stable working conditions.
［実施例］ 以下図面に基づき本考案の実施例を説明する。[Example] Embodiments of the present invention will be described below based on the drawings.
尚、第１図中第２図と同一のものには同符号を
付してある。 Components in FIG. 1 that are the same as those in FIG. 2 are given the same reference numerals.
リーダ３の上端に前後方向に張り出すように
（特に後方に向けて張り出すように）形成したリ
ーダトツプ５をボルトによつて固着する。該リー
ダトツプ５のオーガ１１側先端、及び走行体１側
中途部にシーブ１３，１４を取付ける。フロント
ブラケツト２に固着したブラケツト１５の前記シ
ーブ１４と対向する位置にシーブ１６を設け、又
ブラケツト１５にリンク１７を介して天秤杆１８
を取付け、該天秤杆１８のリーダ側にはシーブ１
９を設ける。前記したリーダトツプ５の走行体側
先端と天秤杆１８の走行体側先端とをバツクテン
シヨンロープ１２で連結する。ウインチ６より繰
出したロープ７をシーブ１６を介してシーブ１４
に一旦掛回した後、天秤杆１８のシーブ１９に掛
回して再び前記シーブ１４に掛回し、次いで、シ
ーブ１３とオーガ１１のシーブ２０にＮ条掛回し
てリーダトツプ５に係着する。 A leader top 5 formed to protrude in the front-rear direction (particularly to protrude toward the rear) is fixed to the upper end of the leader 3 with bolts. Sheaves 13 and 14 are attached to the tip of the leader top 5 on the auger 11 side and in the middle on the traveling body 1 side. A sheave 16 is provided on a bracket 15 fixed to the front bracket 2 at a position opposite to the sheave 14, and a balance rod 18 is connected to the bracket 15 via a link 17.
and sheave 1 on the leader side of the balance rod 18.
9 will be provided. The tip of the leader top 5 on the side of the moving body and the tip of the lever 18 on the side of the moving body are connected by a back tension rope 12. The rope 7 let out from the winch 6 is passed through the sheave 16 to the sheave 14.
After being hooked once, it is hooked around the sheave 19 of the balance rod 18, and then it is hooked again to the sheave 14, and then N-thread is hooked around the sheave 13 and the sheave 20 of the auger 11, and it is attached to the leader top 5.
ここでリーダ３の中心とオーガ１１の中心迄の
距離をL1、リーダ３の中心と天秤杆１８の傾動
中心をL2、リーダ３の中心とシーブ１４，１６
間に張設したロープとの距離をL3、天秤杆１８
の傾動中心とバツクテンシヨンロープ１２間の距
離、又シーブ１４，１９間に張設したロープ間の
距離をそれぞれl2，l1、ロープ張力をＰとする。 Here, the distance between the center of the leader 3 and the center of the auger 11 is L 1 , the center of the leader 3 and the center of tilting of the balance rod 18 is L 2 , the center of the leader 3 and the sheaves 14 and 16
The distance to the rope stretched between them is L 3 , and the balance rod is 18.
Assume that the distance between the center of tilt and the back tension rope 12, and the distance between the ropes stretched between the sheaves 14 and 19 are l 2 and l 1 respectively, and the rope tension is P.
上記構成のバツクテンシヨン装置に於いてリー
ダ中心に関するモーメントの釣合を考察すると下
記の如くなる。 In the buck tension device having the above structure, the balance of moments with respect to the center of the leader is considered as follows.
Ｎ・Ｐ・L1＝Ｐ・L3＋（2P＋2P・l1／l2）L2 即ち、l1／l2を適宜選択することによつてモーメ ントを釣合せることができる。 N.P.L 1 =P.L 3 + (2P+2P.l 1 /l 2 ) The moments can be balanced by appropriately selecting L 2 , that is, l 1 /l 2 .
更に、バツクテンシヨンロープ１２に発生する
張力を2Pl1／l2と小さくすることができる。 Furthermore, the tension generated in the back tension rope 12 can be reduced to 2Pl 1 /l 2 .
又、天秤杆１８が傾動して各ロープ７，１２に
張力を発生せしめるのでリーダトツプ５はリーダ
ー３に固定でき、リーダトツプ５からリーダ３へ
の荷重伝達に於いてリーダ３にモーメントを発生
させる様な状態を生じさせない。 Also, since the balance rod 18 tilts and generates tension in each rope 7, 12, the leader top 5 can be fixed to the leader 3, and when the load is transferred from the leader top 5 to the leader 3, a moment is generated in the leader 3. not cause a condition.
［考案の効果］
以上述べた如く本考案によれば、下記の優れた
効果を発揮し得る。[Effects of the invention] As described above, according to the present invention, the following excellent effects can be exhibited.
（） バツクテンシヨンロープが細くてよい。() The tension rope should be thin.
（） リーダトツプを固定しているのでリーダ
が振動等起すことなく安定な作業が可能であ
る。() Since the leader top is fixed, stable work is possible without the leader causing vibration.
第１図は本考案の１実施例の概略図、第２図は
従来例の概略図である。
２はフロントブラケツト、３はリーダ、５はリ
ーダトツプ、７はワイヤロープ、１１はオーガ、
１２はバツクテンシヨンロープ、１３，１４，１
６，１９，２０はシーブ、１８は天秤杆を示す。
FIG. 1 is a schematic diagram of one embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional example. 2 is the front bracket, 3 is the leader, 5 is the leader top, 7 is the wire rope, 11 is the auger,
12 is the back tension rope, 13, 14, 1
6, 19, and 20 are sheaves, and 18 is a balance rod.
Claims (1)
動自在な天秤杆を設け、該天秤杆の一端と前後方
向に張り出すように形成したリーダトツプの後端
との間にバツクテンシヨンロープを張設し、ウイ
ンチから繰出したロープを、フロントブラケツト
に設けたシーブを介してリーダトツプのリーダ中
心より後端側に設けたシーブに一旦掛回した後、
前記天秤杆の他端に設けたシーブに掛回して再び
前記リーダトツプのリーダ中心より後端側に設け
たシーブに掛回し、次いでリーダトツプの前端に
設けたシーブとオーガに設けたシーブに掛回して
リーダトツプに係着したことを特徴とする杭打機
のバツクテンシヨン装置。 A tiltable take-up rod is provided rearward of the leader of the front bracket, and a back tension rope is stretched between one end of the take-up rod and the rear end of the leader top, which is formed so as to overhang in the front-rear direction. After the rope is once passed through the sheave provided on the front bracket and passed through the sheave provided on the rear end side of the leader center of the leader top,
It is hung around a sheave provided at the other end of the balance rod, and then hung again through a sheave provided on the rear end side of the leader center of the leader top, and then hung around a sheave provided at the front end of the leader top and a sheave provided on the auger. A back tension device for a pile driver, characterized in that it is attached to a leader top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985006662U JPH0414502Y2 (en) | 1985-01-21 | 1985-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985006662U JPH0414502Y2 (en) | 1985-01-21 | 1985-01-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61125544U JPS61125544U (en) | 1986-08-07 |
| JPH0414502Y2 true JPH0414502Y2 (en) | 1992-03-31 |
Family
ID=30484311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985006662U Expired JPH0414502Y2 (en) | 1985-01-21 | 1985-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414502Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6692579B2 (en) * | 2016-08-03 | 2020-05-13 | 日本車輌製造株式会社 | Pile driver |
| CN114278237B (en) * | 2021-12-28 | 2023-10-20 | 山河智能装备股份有限公司 | Self-adaptive balancing mechanism for stand column bending moment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556818U (en) * | 1978-06-30 | 1980-01-17 | ||
| JPS5813751Y2 (en) * | 1978-06-30 | 1983-03-17 | 株式会社三協精機製作所 | Estimated time display device for numerical display watches |
-
1985
- 1985-01-21 JP JP1985006662U patent/JPH0414502Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61125544U (en) | 1986-08-07 |
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