JPH072688Y2 - Electrothermal cutter for cutting disappearing spacers - Google Patents
Electrothermal cutter for cutting disappearing spacersInfo
- Publication number
- JPH072688Y2 JPH072688Y2 JP9245690U JP9245690U JPH072688Y2 JP H072688 Y2 JPH072688 Y2 JP H072688Y2 JP 9245690 U JP9245690 U JP 9245690U JP 9245690 U JP9245690 U JP 9245690U JP H072688 Y2 JPH072688 Y2 JP H072688Y2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cutter
- electrothermal
- electrothermal cutter
- spacers
- 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
- 238000005520 cutting process Methods 0.000 title claims description 20
- 125000006850 spacer group Chemical group 0.000 title claims description 19
- 238000005485 electric heating Methods 0.000 claims 3
- 230000001154 acute effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、例えば地中にコンクリート構造物を構築する
場合のオープンカット工法等における土留め壁と埋殺し
切梁との間に介在せしめて構造物の構築後に縁切りする
ための消滅型スペーサを切断する電熱カッターに関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention interposes between the earth retaining wall and the buried cutting beam in the open-cut construction method when constructing a concrete structure in the ground, for example. The present invention relates to an electrothermal cutter for cutting an extinction type spacer for cutting an edge after constructing a structure.
［従来の技術］ 一般に、上記種類のオープンカット工法では、第３図に
示すように、土留め壁10を支保する切梁11を撤去せずに
構造物の躯体コンクリート12を打設してしまう方法が採
用され、次のような後処理がなされている。[Prior Art] Generally, in the above-mentioned open-cut construction method, as shown in FIG. 3, the concrete frame 12 of the structure is poured without removing the cutting beam 11 supporting the earth retaining wall 10. The method is adopted and the following post-processing is performed.
あらかじめ箱抜き型枠を施工し、躯体コンクリート
12の打設後に切梁を撤去する方法。The box-out formwork was installed in advance, and the skeleton concrete was constructed.
How to remove the beams after placing 12 pieces.
躯体コンクリート12の打設後に鋼製の切梁を加熱切
断して撤去する方法。A method for removing steel beams by heating and cutting them after placing the concrete frame 12.
土留め壁10と躯体コンクリート12の間の切梁11aは
撤去しない方法。The beam 11a between the retaining wall 10 and the concrete frame 12 is not removed.
［考案が解決しようとする課題］ しかしながら、上記の場合には、埋殺された切梁11a
部分を介して土留め壁10からの土圧による押し込み力や
リバウンドによる剪断荷重等が躯体コンクリート12に作
用してクラック発生の原因となり、漏水を引き起こすと
いう問題点があった。[Problems to be solved by the invention] However, in the above case, the buried girder 11a is buried.
There is a problem that the pushing force by the earth pressure from the earth retaining wall 10 and the shear load by the rebound, etc., act on the skeleton concrete 12 through the part, cause cracks, and cause water leakage.
また、上記についても、切梁11aの切断作業クリア
（土留め壁10と躯体コンクリート12の隙間）あるいは切
梁加熱による防水層の破損等の問題があって、切梁撤去
が不可能な場合が多く、上記と同様の事態に至るとい
う問題点があった。Also, with respect to the above, there is a case where the cutting beam cannot be removed due to problems such as clear cutting work of the cutting beam 11a (gap between the earth retaining wall 10 and the concrete frame 12) or damage to the waterproof layer due to heating of the cutting beam. In many cases, there was a problem that the same situation as described above was reached.
さらに、上記の場合には、箱抜き型枠の施工や箱抜き
作業等に時間と手間がかかる等の問題点があった。Further, in the above-mentioned case, there is a problem that it takes time and labor to construct the box-out form and to perform the box-out work.
本考案は、上記従来の問題点を解決するためになされた
もので、その目的とするところは、あらかじめ土留め壁
と躯体コンクリートとの間に切梁の一部として新素材の
消滅型スペーサを設置し、該スペーサを加熱切断するこ
とにより、軸力の作用する切梁と土留め壁の間を縁切り
して、鋼製の切梁ピースを撤去し、切梁の後処理を行う
ことのできる消滅型スペーサ切断用電熱カッターを提供
することにある。The present invention has been made to solve the above-mentioned conventional problems, and the purpose thereof is to provide an extinction type spacer made of a new material between the earth retaining wall and the skeleton concrete in advance as a part of the cutting beam. By installing and cutting the spacer by heating, it is possible to cut the edge between the cut beam and the earth retaining wall on which the axial force acts, remove the steel cut beam piece, and perform post-treatment of the cut beam. An object of the present invention is to provide an electrothermal cutter for cutting an extinction type spacer.
［課題を解決するための手段］ 本考案の消滅型スペーサ切断用電熱カッターは、シーズ
ヒーターを内蔵した電熱カッター部と、該電熱カッター
部の両端を保持する把手部と、上記電熱カッター部に接
続された電源コードと、から構成されていることを特徴
とする。[Means for Solving the Problem] An extinguishing type spacer cutting electrothermal cutter of the present invention is an electrothermal cutter part having a sheathed heater built-in, a grip part for holding both ends of the electrothermal cutter part, and the electrothermal cutter part. It is characterized in that it is composed of
また、上記電熱カッター部の少なくとも下側縁の断面形
状を鋭角に形成したことを特徴とする。Further, it is characterized in that at least the lower side edge of the electrothermal cutter section has an acute-angled cross-sectional shape.
さらに、上記電源コードの途中に温度調節装置を設けた
ことを特徴とするものである。Further, a temperature adjusting device is provided in the middle of the power cord.
［実施例］ 以下、本考案の一実施例について図面を参照しながら説
明する。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１は電熱カッター部であって、シーズ
ヒーター２を内蔵している。該電熱カッター部１の少な
くとも下側縁は断面が鋭角に形成されて切断効果を向上
せしめるようになっている。上記シーズヒーター２の両
側は防水・耐衝撃用の配線用シース2aとなっていて電熱
カッター１から露出して上方に折れ曲がっており、その
上端部は把手部３に取り付けられている。尚、電熱カッ
ター部１の両端部を把手部３に直接取り付けてもよい。In FIG. 1, reference numeral 1 denotes an electrothermal cutter, which has a sheathed heater 2 built therein. At least the lower edge of the electrothermal cutter portion 1 has an acute-angled cross section to improve the cutting effect. Both sides of the sheathed heater 2 are waterproof and shockproof wiring sheaths 2a, which are exposed from the electrothermal cutter 1 and are bent upward, and the upper end portion thereof is attached to the handle portion 3. Both ends of the electrothermal cutter unit 1 may be directly attached to the handle 3.
把手部３の長さ寸法は、少なくとも、切断すべきスペー
サーと切断作業者の操作位置との距離寸法を有し、伸縮
自在あるいは継足し自在に構成してもよい。該把手部３
の上端部には必要に応じてハンドル3aを設ける。本実施
例の把手部３は、２本の棒材を連結杆3bにより連結して
いるが、この構成に限定するものではなく、要するに電
熱カッター部１を保持し得る長尺状のものであればよ
い。尚、最下部の連結杆3bと電熱カッター部１との間隔
寸法は、少なくともスペーサーの高さ寸法を有する。The length dimension of the handle portion 3 has at least a distance dimension between the spacer to be cut and the operation position of the cutting operator, and may be configured to be extendable and retractable. The handle part 3
A handle 3a is provided on the upper end of the handle as required. The handle portion 3 of this embodiment connects two rod members by the connecting rod 3b, but the handle portion 3 is not limited to this structure, and may be a long one capable of holding the electrothermal cutter portion 1. Good. The distance between the lowermost connecting rod 3b and the electrothermal cutter unit 1 is at least the height of the spacer.
上記把手部３の内部には、上記シーズヒーター２に電気
を供給する電源コード４が収められていて、上端部から
外方に導出されており、途中に温度調節器４が設けられ
ていて、その先端部には接続プラグ５が設けられてい
る。A power cord 4 for supplying electricity to the sheath heater 2 is housed inside the handle portion 3, is led out from the upper end portion, and a temperature controller 4 is provided on the way. A connection plug 5 is provided at its tip.
本実施例のカッターは以上のように構成されているの
で、上記シーズヒーター２に電気を通して電熱カッター
部１を発熱させ、加熱状態の電熱カッター部１をスペー
サー６の上方から近付けて押し付けると、第２図に示す
ように、該スペーサー６は加熱されて熔融し、両側の切
梁ピース7,7が縁切りされる。本実施例では、電熱カッ
ター部１の温度は約500℃以上に加熱され、超高分子量
ポリエチレン等から成るスペーサー６が切断される。Since the cutter of the present embodiment is configured as described above, when electricity is passed through the sheath heater 2 to cause the electrothermal cutter unit 1 to generate heat, and the electrothermal cutter unit 1 in the heated state is brought close to the spacer 6 from above and pressed, As shown in FIG. 2, the spacer 6 is heated and melted, and the beam pieces 7, 7 on both sides are trimmed. In this embodiment, the temperature of the electrothermal cutter unit 1 is heated to about 500 ° C. or higher, and the spacer 6 made of ultra high molecular weight polyethylene or the like is cut.
スペーサー６の下端部に達した電熱カッター部１を、切
り離されたスペーサー６内を引き上げて切り離し作業を
終了する。The electrothermal cutter unit 1 that has reached the lower end of the spacer 6 is pulled up inside the separated spacer 6 and the work is completed.
尚、本願考案の電熱カッターは上記実施例のようなオー
プンカット工法の切梁に限らず、押圧力の加わっている
仮設構造材の間に設けた熱消滅型スペーサーであれば、
いずれの工法にも使用し得るものである。The electrothermal cutter of the present invention is not limited to the open-cut construction beam as in the above-described embodiment, but a heat-dissipating spacer provided between temporary structural members to which a pressing force is applied may be used.
It can be used in any construction method.
［考案の効果］ （１） 従来技術では、切梁撤去が不可能な作業クリア
（土留め壁と躯体コンクリートの隙間）でも、この電熱
カッターを使用することにより、撤去可能となる。[Advantages of the Invention] (1) In the conventional technique, even if the work can not be removed (clearance between the earth retaining wall and the concrete frame), it can be removed by using this electrothermal cutter.
（２） 従来放置された埋殺し切梁を介して躯体コンク
リートに及ぼされる悪影響の問題が解消される。(2) The problem of the bad influence exerted on the skeleton concrete through the conventionally buried mortar beams is solved.
すなわち、悪影響とは、土圧による押し抜き荷重、掘削
底面変位による鉛直方向剪断荷重、及び地下水位の変動
による繰返し荷重等によるクラックの発生とそれに伴う
漏水である。That is, the adverse effects are the generation of cracks due to the pushing load due to the earth pressure, the vertical shear load due to the excavation bottom displacement, and the repeated load due to the fluctuation of the groundwater level, and the accompanying water leakage.
（３） ガスバーナ等を用いた鋼製切梁の加熱切断で発
生する躯体コンクリートの防水層破損問題が解消され
る。(3) The problem of damage to the waterproof layer of the skeleton concrete, which occurs when the steel beam is heated and cut using a gas burner or the like, is solved.
第１図は本考案のカッターの一実施例を示す斜視図、第
1A図は電熱カッター部の拡大断面図、第２図はスペーサ
ーの切断作業を示す説明図、第３図はオープンカット工
法の説明図である。 １……電熱カッター部、２……シーズヒーター、2a……
配線用シース、３……把手部、3a……ハンドル、3b……
連結杆、４……電源コード、５……温度調節器、６……
接続プラグ、７……スペーサー、８……切梁ピース。FIG. 1 is a perspective view showing an embodiment of the cutter of the present invention,
FIG. 1A is an enlarged cross-sectional view of an electrothermal cutter, FIG. 2 is an explanatory view showing a spacer cutting operation, and FIG. 3 is an explanatory view of an open-cut construction method. 1 ... Electric heat cutter part, 2 ... Sheath heater, 2a ...
Wiring sheath, 3 ... Handle, 3a ... Handle, 3b ...
Connection rod, 4 ... power cord, 5 ... temperature controller, 6 ...
Connection plug, 7 ... Spacer, 8 ... Beam piece.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 渡辺 正一 北海道札幌市豊平区平岡883―169 (72)考案者 佐々木 稔 愛知県名古屋市名東区よもぎ台１―1122 (72)考案者 岡田 寿男 愛知県豊橋市大橋通３―53―304 (72)考案者 酒井 邦登 東京都東久留米市新川町１―１―３ (72)考案者 渋沢 重彦 神奈川県横浜市神奈川区平川町10―２― 405 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Shoichi Watanabe 883-169 Hiraoka, Toyohira-ku, Sapporo-shi, Hokkaido (72) Creator Minoru Sasaki 1-1212 Yomogidai, Meito-ku, Nagoya-shi (72) Creator Hisao Okada Aichi-ken 3-53-304 Ohashi-dori, Toyohashi City (53) Inventor Kunito Sakai 1-1-3 Shinkawa-cho, Higashi-Kurume City, Tokyo (1-2) Inventor Shigehiko Shibusawa 10-2-405, Hirakawa-cho, Kanagawa-ku, Yokohama
Claims (3)
と、該電熱カッター部の両端を保持する把手部と、上記
電熱カッター部に接続された電源コードと、から構成さ
れていることを特徴とする消滅型スペーサ切断用電熱カ
ッター。1. An electric heating cutter portion containing a sheathed heater, a grip portion for holding both ends of the electric heating cutter portion, and a power cord connected to the electric heating cutter portion. An electrothermal cutter for cutting disappearing spacers.
断面形状を鋭角に形成したことを特徴とする請求項１に
記載の消滅型スペーサ切断用電熱カッター。2. The electrothermal cutter for annihilation type spacer cutting according to claim 1, wherein at least a lower side edge of the electrothermal cutter portion is formed to have an acute sectional shape.
けたことを特徴とする請求項１または２に記載の消滅型
スペーサ切断用電熱カッター。3. An electrothermal cutter for cutting extinguishing spacers according to claim 1, wherein a temperature adjusting device is provided in the middle of the power cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245690U JPH072688Y2 (en) | 1990-09-04 | 1990-09-04 | Electrothermal cutter for cutting disappearing spacers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245690U JPH072688Y2 (en) | 1990-09-04 | 1990-09-04 | Electrothermal cutter for cutting disappearing spacers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0450438U JPH0450438U (en) | 1992-04-28 |
| JPH072688Y2 true JPH072688Y2 (en) | 1995-01-25 |
Family
ID=31828921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9245690U Expired - Lifetime JPH072688Y2 (en) | 1990-09-04 | 1990-09-04 | Electrothermal cutter for cutting disappearing spacers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH072688Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5266444B2 (en) * | 2009-04-21 | 2013-08-21 | 株式会社高分子加工研究所 | Heat cutting cutter for web cutting and web horizontal cutting apparatus |
-
1990
- 1990-09-04 JP JP9245690U patent/JPH072688Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0450438U (en) | 1992-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |