JP2004044355A - Spreader for door frame removal - Google Patents

Spreader for door frame removal Download PDF

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Publication number
JP2004044355A
JP2004044355A JP2002237663A JP2002237663A JP2004044355A JP 2004044355 A JP2004044355 A JP 2004044355A JP 2002237663 A JP2002237663 A JP 2002237663A JP 2002237663 A JP2002237663 A JP 2002237663A JP 2004044355 A JP2004044355 A JP 2004044355A
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JP
Japan
Prior art keywords
door frame
claw
extension
spreader
mortar
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.)
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JP2002237663A
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Japanese (ja)
Inventor
Takanori Fukuda
福田 崇範
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ARUMA TOOLS KK
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ARUMA TOOLS KK
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Priority to JP2002237663A priority Critical patent/JP2004044355A/en
Publication of JP2004044355A publication Critical patent/JP2004044355A/en
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  • Door And Window Frames Mounted To Openings (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spreader for door frame removal for efficiently and neatly peeling off and removing a door frame from a mortar part after a mortar destruction work around the outer peripheral part of the door frame is completed. <P>SOLUTION: A claw for spreading a clearance between the door frame and the mortar part by inserting into the clearance between the door frame and the mortar part, a claw expansion means for spreading the claw by a primary expansion mechanism and a secondary expansion mechanism, and a hydraulic cylinder for providing a drive force to the claw expansion means are connected to a body metal fitting. The rod of the hydraulic cylinder is extended by an external hydraulic pump to spread the clearance between the door frame and the mortar part so as to peel off the door frame from the mortar part. The primary expansion mechanism is so structured that the claw can be spread in a sector shape around a rotating shaft, and the secondary expansion mechanism is so structured that the claw can be spread parallel with each other by sliding a slide shaft for a claw holding metal fitting in the slide groove of the body metal fitting. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、鉄筋コンクリート住宅における玄関ドアの外周部にあるスチール製戸枠の撤去作業に関し、特に戸枠外周部のモルタルの破壊作業後において、モルタル部より戸枠を引き剥がして撤去するための、戸枠撤去用スプレッダーに関するものである。
【0002】
【従来の技術】
従来、分譲マンションや賃貸マンション等の鉄筋コンクリート住宅において、玄関ドアをリフォームするための戸枠撤去の作業手段として、ブレーカーを用いて戸枠周辺のモルタルを破壊する方法いわゆるハツリ工法が一般的に行われていた。また、本願出願人による特願2002−116847号公報に示されているような専用の戸枠撤去装置によっても行われている。
【0003】
上記手段は戸枠周辺のモルタルを破壊するのが主な目的であるため、該戸枠周辺のモルタルが強固な場合には十分にモルタルを破壊することができず、更に戸枠に固着されたアンカーによりモルタル部より戸枠を引き剥がして撤去することは容易ではなかった。このため、レスキュー等に使用されるマルチカッター用スプレッダーを戸枠とモルタル部の間に挿入し、該スプレッダーの爪を広げることによりモルタル部より戸枠を引き剥がして撤去を行っている。
【0004】
【発明が解決しようとする課題】
しかしながら、上記マルチカッター用スプレッダーの爪の開口幅は一般的に100mm程度が最大でありしかも扇状に広がるため、65mm又は86mm幅の戸枠をモルタル部より引き剥がすために広げた場合、該爪の先端が戸枠より滑って外れることにより作業性の低下を招くといった問題点があった。また、爪が扇状に広がることにより、該爪の先端が縁切りしたモルタル部の角に当って傷をつけてしまうといった問題点もあった。
【0005】
本発明は、以上のような問題点に鑑み成されたものであり、戸枠外周部のモルタルの破壊作業後において、モルタル部より戸枠を効率的且つ綺麗に引き剥がして撤去するための、戸枠撤去用スプレッダーを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記課題を解決するため、本発明の戸枠撤去用スプレッダーは、戸枠とモルタル部の間に挿入して当該戸枠とモルタル部との間隙を広げるための爪と、該爪を一次拡張機構と二次拡張機構により広げるための爪拡張手段と、該爪拡張手段に駆動力を与えるための油圧シリンダーとを本体金具に係着して配設し、外部油圧ポンプによる油圧シリンダーのロッドの伸長により戸枠とモルタル部との間隙を広げて戸枠をモルタル部より引き剥がすことができる装置とする。
【0007】
上記爪拡張手段における一次拡張機構として、略三角形状の爪拡張金具の先端部に形成された一次拡張部が爪の一次拡張当接部を押圧することにより、爪を回動軸を中心に扇状に広げることができる構造とする。
【0008】
上記爪拡張手段における二次拡張機構として、略三角形状の爪拡張金具の傾斜部における二次拡張部が爪保持金具の二次拡張当接部を押圧することにより、爪を本体金具の溝にて爪保持金具のスライド軸をスライドさせて平行に広げることができる構造とする。
【0009】
【発明の実施の形態】
本発明の実施の形態を図を用いて説明する。図1は本発明の戸枠撤去用スプレッダーの外形図である。また、図2は本発明の戸枠撤去用スプレッダーを構成する爪及び爪保持金具の外形図、図3は本発明の戸枠撤去用スプレッダーを構成する本体金具の外形図、図4は本発明の戸枠撤去用スプレッダーを構成する爪拡張金具の外形図である。
【0010】
図1に示すように、本発明の戸枠撤去用スプレッダー1は、戸枠とモルタル部の間に挿入して当該戸枠とモルタル部との間隙を広げるための爪2と、該爪2を一次拡張機構と二次拡張機構により広げるための爪拡張手段と、該爪拡張手段に駆動力を与えるための油圧シリンダー16とを本体金具7に係着して配設し、外部油圧ポンプによる油圧シリンダー16のロッド19の伸長により戸枠とモルタル部との間隙を広げて戸枠をモルタル部より引き剥がす構造の装置とする。
【0011】
図2に示すように、爪2は先端部が鋭角状の略二等辺三角形状を成し、底部外端部が爪保持金具5の外端上部において回動軸4にて軸着され、該回動軸4を中心に扇状に広がることができる。これを、一次拡張と称する。また、爪2の底部内端部には図4に示す爪拡張金具11の先端部の内側に形成された一次拡張部23の押圧により一次拡張作用を生じさせる一次拡張当接部3を形成する。また、爪2の先端部外側には、拡張対象物すなわちモルタル部や戸枠からの滑りを防ぐための滑り止用溝を多数形成する。爪保持金具5はスライド軸22の外端上部において爪2の底部外端部を回動軸4にて軸着し、図3に示す本体金具7の溝21にて爪保持金具5のスライド軸22をスライドさせて平行に広げることができる。これを、二次拡張と称する。また、爪保持金具5の外端内側には図4に示す爪拡張金具11の傾斜部における二次拡張部24の押圧により二次拡張作用を生じさせる二次拡張当接部6を形成する。なお、図1に示す爪2の先端部側面には間隙があるため、該部位の強度を補強するための補強金具28を装着する。
【0012】
また図3に示すように、本体金具7は爪保持金具5のスライド軸22をスライドさせるための溝21を形成し、更に爪拡張金具11の一次拡張ガイド25及び二次拡張ガイド26と連通してピン31を配設するための溝29と、爪拡張金具11の主ガイド27と連通してピン32を配設するための孔30を穿設する。
【0013】
次に、図5は本発明の戸枠撤去用スプレッダーにおける一次拡張機構を説明するための本体内部機構図、図6は本発明の戸枠撤去用スプレッダーにおける二次拡張機構を説明するための本体内部機構図であり、爪2を回動軸4にて軸着した爪保持金具5のスライド軸22を、本体金具7の溝21に装着した状態での拡張動作を説明する。
【0014】
まず図5に示すように、一次拡張機構として、爪拡張金具11の先端部に形成された一次拡張部23が爪2の一次拡張当接部3を図中矢印a方向に押圧することにより、爪2を回動軸4を中心に図中矢印b方向に扇状に広げることができる。この時、爪保持金具5のスライド軸22は本体金具7の溝21に装着されたままである。
【0015】
次に図6に示すように、二次拡張機構として、爪拡張金具11の傾斜部における二次拡張部24が爪保持金具5の二次拡張当接部6を図中矢印c方向に押圧することにより、爪2を本体金具7の溝21にて爪保持金具5のスライド軸22をスライドさせて図中矢印d方向に平行に広げることができる。この時、爪2の一次拡張当接部3は爪拡張金具11の二次拡張部24に当接した状態となるため、一次拡張完了時の状態を保持したまま二次拡張を行うことができる。
【0016】
なお、図5及び図6は図1における戸枠撤去用スプレッダー1の左側の爪2及び爪保持金具5を本体金具7に装着した状態を示しているが、実際には該左側の機構を左右対称及び前後対称に構成して右側に配設し、更に爪拡張金具11を挟設することにより、図1に示す外形構造となる。また、本体金具7の上部と爪2の一次拡張当接部3の後部との間にバネ10を配設する。該バネ10は、戸枠撤去用スプレッダー1の未使用時において爪2が不用意に広がるのを防止するためである。また、片面の本体金具7の略中央部には、戸枠撤去用スプレッダー1を把持しやすくするためのグリップ(図示せず)を固定するためのグリップ固定孔8を穿孔し、ピン32に軸着する。また、該本体金具7の中央上部において、ボルト9にて本体金具7を両面より固定する。
【0017】
また図1に示すように、爪拡張金具11の後端部にロッド連結金具12を固着し、爪保持金具5の後端部に固定金具13を固定軸15にて固定し、更に該固定金具13の後端部にシリンダー固定金具14を固定軸15にて固定する。そして、該シリンダー固定金具14に固定された油圧シリンダー16のロッド19を前記ロッド連結金具12と連結する。また、固定金具13の補強のため、左右の固定金具13を別の固定金具20にて固定する。
【0018】
【実施例】
本発明の実施例を図を用いて説明する。図7は本発明の戸枠撤去用スプレッダーによりモルタル部より戸枠を引き剥がすための設置系統図である。
【0019】
まず、戸枠撤去用スプレッダー1の油圧シリンダー16の伸長側カプラー17及び収縮側カプラー18に油圧ポンプ35からの伸長用ホース36及び収縮用ホース37をそれぞれ接続する。そして、戸枠撤去用スプレッダー1の本体に配設したスイッチ(図示せず)を操作することにより油圧シリンダー16のロッド19を伸長と収縮の2通りの動作を行わせることができる。
【0020】
次に、戸枠撤去用スプレッダー1の先端部の爪2をドア33の外周部にある戸枠34とモルタル部38の間に挿入したのち油圧ポンプ35を作動させて油圧シリンダー16を加圧する。そして、該油圧シリンダー16のロッド19を伸長させて爪2を広げることにより、戸枠34とモルタル部38との間隙を広げて戸枠34をモルタル部38より引き剥がすことができる。
【0021】
この時の戸枠撤去用スプレッダー1の爪2の拡張状態を段階を追って説明する。なお、一部説明において図5及び図6を参照されたい。
【0022】
図8は本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、一次拡張開始時の状態図である。該図においては、シリンダー16に対し油圧ポンプ35からの加圧はまだ行われていなく、いわゆる初期状態である。この時、爪拡張金具11の一次拡張部23は爪2の一次拡張当接部3を押圧していなく、爪2の内面側は互いに接触した状態である。該図は一次拡張の初期段階であり、本体金具7の溝29に装着したピン31は爪拡張金具11の一次拡張ガイド25の端部にある状態を示している。また、本体金具7の孔30と連通したピン32は爪拡張金具11の主ガイド27の端部にある状態を示している。
【0023】
図9は本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、一次拡張時の状態図である。該図においては、シリンダー16の伸長側カプラー17に接続された伸長用ホース36により油圧ポンプ35からの加圧が行われ、シリンダー19が伸長する。この時、爪拡張金具11の一次拡張部23は爪2の一次拡張当接部3を押圧するため、爪2は爪保持金具5の外端上部にて軸着された回動軸4を中心に扇状に広がる。該図は一次拡張の途中段階であり、本体金具7の溝29に装着したピン31は爪拡張金具11の一次拡張ガイド25の端部より移動した状態を示している。
【0024】
図10は本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、二次拡張開始時の状態図である。該図においても、シリンダー16の伸長側カプラー17に接続された伸長用ホース36により油圧ポンプ35からの加圧が行われ、図9の状態より更にシリンダー19が伸長する。この時、爪拡張金具11の二次拡張部23は爪保持金具5の二次拡張当接部6を押圧するため、爪2は本体金具7の溝21にて爪保持金具5のスライド軸22がスライドして平行に広がる。該図は二次拡張の初期段階であり、本体金具7の溝29に装着したピン31は爪拡張金具11の二次拡張ガイド26の端部にある状態を示している。
【0025】
図11は本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、二次拡張完了時の状態図である。該図においても、シリンダー16の伸長側カプラー17に接続された伸長用ホース36により油圧ポンプ35からの加圧が行われ、図10の状態より更にシリンダー19が伸長する。この時、爪拡張金具11の二次拡張部23は爪保持金具5の二次拡張当接部6を更に押圧するため、爪2は本体金具7の溝21にて爪保持金具5のスライド軸22がスライドして更に平行に広がる。該図は二次拡張の終了段階であり、本体金具7の溝29に装着したピン31は爪拡張金具11の二次拡張ガイド26の他端部にある状態を示している。また、本体金具7の孔30と連通したピン32は爪拡張金具11の主ガイド27の他端部にある状態を示している。
【0026】
以上のようにして、作業部位における戸枠34をモルタル部38より引き剥がすことが完了すれば、油圧ポンプ35を逆作動させて油圧シリンダー16のロッド19を収縮させて爪2を狭め、別の部位にて再度拡張を行う。この動作を戸枠34の全周に沿って行うことにより戸枠34をモルタル部38より引き剥がすことが可能になる。本作業において、二次拡張時における爪2の拡張は平行拡張となるため、爪2の先端が戸枠34より滑って外れることもなく、縁切りしたモルタル部38の角に傷をつけることもない。なお、本発明の戸枠撤去用スプレッダー1は、戸枠撤去用に限定せずレスキュー・その他解体分離作業等に使用するスプレッダーとして用いても効率的且つ安全に使用することができるものである。
【0027】
【発明の効果】
以上述べたように、本発明の戸枠撤去用スプレッダーを用いて分譲マンションや賃貸マンション等の鉄筋コンクリート住宅における玄関ドアの外周部にあるスチール製戸枠の撤去作業を行うようにすれば、戸枠外周部のモルタルの破壊作業後において、該戸枠撤去用スプレッダーの二次拡張時における爪の拡張は平行拡張となるため、爪の先端が戸枠より滑って外れることもなく、縁切りしたモルタル部の角に傷をつけることもなく、戸枠を効率的且つ綺麗に引き剥がして撤去することができるという絶大なる効果を奏する。また、戸枠撤去用に限定せずレスキュー・その他解体分離作業等に使用するスプレッダーとして用いても効率的且つ安全に使用することができるという効果を奏する。
【図面の簡単な説明】
【図1】本発明の戸枠撤去用スプレッダーの外形図である。
【図2】本発明の戸枠撤去用スプレッダーを構成する爪及び爪保持金具の外形図である。
【図3】本発明の戸枠撤去用スプレッダーを構成する本体金具の外形図である。
【図4】本発明の戸枠撤去用スプレッダーを構成する爪拡張金具の外形図である。
【図5】本発明の戸枠撤去用スプレッダーにおける一次拡張機構を説明するための本体内部機構図である。
【図6】本発明の戸枠撤去用スプレッダーにおける二次拡張機構を説明するための本体内部機構図である。
【図7】本発明の戸枠撤去用スプレッダーによりモルタル部より戸枠を引き剥がすための設置系統図である。
【図8】本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、一次拡張開始時の状態図である。
【図9】本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、一次拡張時の状態図である。
【図10】本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、二次拡張開始時の状態図である。
【図11】本発明の戸枠撤去用スプレッダーの拡張機構を説明するための内部構造図であり、二次拡張完了時の状態図である。
【符号の説明】
1 戸枠撤去用スプレッダー
2 爪
3 一次拡張当接部
4 回動軸
5 爪保持金具
6 二次拡張当接部
7 本体金具
8 グリップ固定孔
9 ボルト
10 バネ
11 爪拡張金具
12 ロッド連結金具
13 固定金具
14 シリンダー固定金具
15 固定軸
16 油圧シリンダー
17 伸長側カプラー
18 収縮側カプラー
19 ロッド
20 固定金具
21 溝
22 スライド軸
23 一次拡張部
24 二次拡張部
25 一次拡張ガイド
26 二次拡張ガイド
27 主ガイド
28 補強金具
29 溝
30 孔
31 ピン
32 ピン
33 ドア
34 戸枠
35 油圧ポンプ
36 伸長用ホース
37 収縮用ホース
38 モルタル部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to the removal work of the steel door frame on the outer periphery of the entrance door in a reinforced concrete house, particularly after the work of breaking the mortar on the outer periphery of the door frame, to remove the door frame from the mortar part and remove it, It relates to a spreader for removing a door frame.
[0002]
[Prior art]
Conventionally, in reinforced concrete houses such as condominiums and rental condominiums, as a means of removing a door frame to renovate an entrance door, a method of using a breaker to destroy mortar around the door frame, a so-called chipping method, is generally performed. I was Further, this is also performed by a dedicated door frame removing device as disclosed in Japanese Patent Application No. 2002-116847 by the present applicant.
[0003]
Since the main purpose of the above-mentioned means is to destroy the mortar around the door frame, if the mortar around the door frame is strong, the mortar cannot be sufficiently destroyed, and the mortar is further fixed to the door frame. It was not easy to remove the door frame from the mortar with an anchor and remove it. For this reason, a multi-cutter spreader used for rescue or the like is inserted between the door frame and the mortar portion, and the spreader's claws are widened to remove the door frame from the mortar portion to remove the spreader.
[0004]
[Problems to be solved by the invention]
However, since the opening width of the claw of the multi-cutter spreader is generally about 100 mm at the maximum and spreads in a fan shape, when the door frame having a width of 65 mm or 86 mm is widened to be peeled off from the mortar portion, the width of the claw of the claw is reduced There has been a problem that the workability is reduced due to the leading end slipping off the door frame. In addition, there is a problem that the nail spreads in a fan shape, and the tip of the nail hits a corner of the mortar portion which is cut off, thereby causing a problem.
[0005]
The present invention has been made in view of the above problems, after the work of breaking the mortar on the outer periphery of the door frame, to remove the door frame from the mortar part efficiently and cleanly, to remove, It is intended to provide a spreader for removing a door frame.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a spreader for removing a door frame of the present invention includes a claw inserted between a door frame and a mortar portion to widen a gap between the door frame and the mortar portion, and a primary expansion mechanism for the claw. And a pawl extending means for expanding the pawl by the secondary extending mechanism, and a hydraulic cylinder for giving a driving force to the pawl extending means, are disposed in engagement with the main body fitting, and the rod of the hydraulic cylinder is extended by an external hydraulic pump. Thereby, the gap between the door frame and the mortar portion is widened, so that the door frame can be peeled off from the mortar portion.
[0007]
As a primary extension mechanism of the nail extension means, a primary extension formed at a distal end of a substantially triangular nail extension fitting presses a primary extension contact portion of the nail, thereby causing the nail to be fan-shaped about a rotation axis. And a structure that can be extended.
[0008]
As a secondary extension mechanism in the nail extension means, the secondary extension in the inclined portion of the substantially triangular nail extension presses the secondary extension abutment of the nail holding bracket, so that the nail is inserted into the groove of the main body bracket. Then, the slide shaft of the claw holder is slid so that it can be expanded in parallel.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an outline drawing of the spreader for door frame removal of this invention. FIG. 2 is an external view of a claw and a claw holding bracket of the spreader for removing a door frame of the present invention. FIG. 3 is an outline view of a main body bracket of the spreader for removing a door frame of the present invention. It is an outline drawing of a nail extension metal fitting which constitutes a spreader for door frame removal of.
[0010]
As shown in FIG. 1, a spreader 1 for removing a door frame according to the present invention includes a claw 2 inserted between a door frame and a mortar portion to widen a gap between the door frame and the mortar portion. A pawl expanding means for expanding by the primary expanding mechanism and the secondary expanding mechanism, and a hydraulic cylinder 16 for giving a driving force to the pawl expanding means are disposed in a state of being engaged with the main body fitting 7, and hydraulic pressure by an external hydraulic pump is provided. An apparatus having a structure in which the gap between the door frame and the mortar portion is widened by extending the rod 19 of the cylinder 16 and the door frame is peeled off from the mortar portion.
[0011]
As shown in FIG. 2, the claw 2 has a substantially isosceles triangular shape with a sharp tip at the tip, and a bottom outer end is pivotally mounted on a rotating shaft 4 above an outer end of the claw holder 5. The fan can be spread in a fan shape about the rotation shaft 4. This is called a primary extension. In addition, a primary expansion contact portion 3 that generates a primary expansion action by pressing a primary expansion portion 23 formed inside the distal end portion of the nail expansion metal fitting 11 shown in FIG. 4 is formed at the bottom inner end of the nail 2. . A large number of non-slip grooves are formed on the outer side of the distal end of the claw 2 to prevent slippage from the expansion target, that is, the mortar portion or the door frame. The claw holding member 5 has a bottom outer end portion of the claw 2 axially mounted on the rotation shaft 4 above the outer end of the slide shaft 22, and a slide shaft of the claw holding member 5 in a groove 21 of the main body fitting 7 shown in FIG. 3. 22 can be slid and expanded in parallel. This is called a secondary extension. In addition, a secondary expansion contact portion 6 that generates a secondary expansion action by pressing the secondary expansion portion 24 in the inclined portion of the nail expansion metal fitting 11 shown in FIG. 4 is formed inside the outer end of the nail holding metal fitting 5. Since there is a gap on the side surface of the tip of the nail 2 shown in FIG. 1, a reinforcing metal fitting 28 for reinforcing the strength of the portion is attached.
[0012]
As shown in FIG. 3, the main body fitting 7 forms a groove 21 for sliding the slide shaft 22 of the claw holding fitting 5, and further communicates with the primary extension guide 25 and the secondary extension guide 26 of the claw extension fitting 11. A hole 30 for arranging the pin 32 is formed by communicating with the groove 29 for disposing the pin 31 and the main guide 27 of the claw extension fitting 11.
[0013]
Next, FIG. 5 is a main body internal mechanism diagram for explaining a primary extension mechanism in a door frame removing spreader of the present invention, and FIG. 6 is a main body for explaining a secondary extension mechanism in a door frame removing spreader of the present invention. It is an internal mechanism figure, and demonstrates the expansion operation | movement in the state which mounted | worn the slide shaft 22 of the nail | claw holding fixture 5 with which the nail | claw 2 was pivotally mounted on the rotating shaft 4 in the groove | channel 21 of the main body fixture 7. FIG.
[0014]
First, as shown in FIG. 5, as a primary extension mechanism, a primary extension portion 23 formed at a distal end portion of the claw extension fitting 11 presses the primary extension contact portion 3 of the claw 2 in a direction of an arrow a in the drawing. The pawl 2 can be spread in a fan shape in the direction of the arrow b in FIG. At this time, the slide shaft 22 of the claw holder 5 is still mounted in the groove 21 of the main body 7.
[0015]
Next, as shown in FIG. 6, as a secondary extension mechanism, the secondary extension portion 24 in the inclined portion of the claw extension metal fitting 11 presses the secondary extension abutment portion 6 of the claw holding metal fitting 5 in the direction of arrow c in the figure. Thus, the claw 2 can be expanded in parallel with the arrow d direction in the figure by sliding the slide shaft 22 of the claw holding metal fitting 5 in the groove 21 of the main body metal fitting 7. At this time, the primary extension contact portion 3 of the claw 2 comes into contact with the secondary extension portion 24 of the claw extension fitting 11, so that the secondary extension can be performed while maintaining the state at the time of completion of the primary extension. .
[0016]
5 and 6 show a state in which the left claw 2 and the claw holding bracket 5 of the door frame removing spreader 1 in FIG. 1 are attached to the main body bracket 7, but actually, the left mechanism is left and right. The outer structure shown in FIG. 1 is obtained by symmetrically and symmetrically arranged in the front-rear direction, arranged on the right side, and further sandwiching the claw extension fitting 11. In addition, a spring 10 is provided between the upper part of the main body fitting 7 and the rear part of the primary expansion contact part 3 of the claw 2. The spring 10 is for preventing the claws 2 from being carelessly spread when the door frame removing spreader 1 is not used. In addition, a grip fixing hole 8 for fixing a grip (not shown) for facilitating the gripping of the door frame removing spreader 1 is formed in a substantially central portion of the main body metal fitting 7 on one surface. To wear. At the upper center of the main body 7, the main body 7 is fixed from both sides with bolts 9.
[0017]
As shown in FIG. 1, a rod connecting fitting 12 is fixed to a rear end of the claw extension fitting 11, and a fixing fitting 13 is fixed to a rear end of the claw holding fitting 5 by a fixed shaft 15. A cylinder fixing bracket 14 is fixed to a rear end of the cylinder 13 with a fixing shaft 15. Then, the rod 19 of the hydraulic cylinder 16 fixed to the cylinder fixing member 14 is connected to the rod connecting member 12. In order to reinforce the fixing bracket 13, the left and right fixing brackets 13 are fixed by another fixing bracket 20.
[0018]
【Example】
An embodiment of the present invention will be described with reference to the drawings. FIG. 7 is an installation system diagram for peeling a door frame from a mortar part by the door frame removing spreader of the present invention.
[0019]
First, the extension hose 36 and the contraction hose 37 from the hydraulic pump 35 are connected to the extension side coupler 17 and the contraction side coupler 18 of the hydraulic cylinder 16 of the door frame removing spreader 1, respectively. By operating a switch (not shown) provided on the main body of the door frame removing spreader 1, the rod 19 of the hydraulic cylinder 16 can be caused to perform two operations of extension and contraction.
[0020]
Next, after inserting the claw 2 at the tip end of the spreader 1 for removing the door frame between the door frame 34 and the mortar section 38 on the outer periphery of the door 33, the hydraulic pump 35 is operated to pressurize the hydraulic cylinder 16. Then, by extending the rod 19 of the hydraulic cylinder 16 and expanding the pawl 2, the gap between the door frame 34 and the mortar part 38 is widened, and the door frame 34 can be peeled off from the mortar part 38.
[0021]
The expanded state of the pawl 2 of the door frame removing spreader 1 at this time will be described step by step. Please refer to FIGS. 5 and 6 for a partial description.
[0022]
FIG. 8 is an internal structural view for explaining an expansion mechanism of the door frame removing spreader of the present invention, and is a state diagram at the time of starting primary expansion. In this figure, the cylinder 16 has not been pressurized by the hydraulic pump 35 yet, which is a so-called initial state. At this time, the primary extension 23 of the claw extension fitting 11 does not press the primary extension abutment 3 of the claw 2, and the inner surfaces of the claw 2 are in contact with each other. This figure is an initial stage of the primary expansion, and shows a state in which the pin 31 attached to the groove 29 of the main body metal fitting 7 is at the end of the primary expansion guide 25 of the claw expansion metal fitting 11. Further, the pin 32 communicating with the hole 30 of the main body fitting 7 is shown at the end of the main guide 27 of the claw extension fitting 11.
[0023]
FIG. 9 is an internal structural view for explaining an expansion mechanism of the door frame removing spreader of the present invention, and is a state diagram at the time of primary expansion. In this figure, the pressure is applied from a hydraulic pump 35 by an extension hose 36 connected to the extension side coupler 17 of the cylinder 16, and the cylinder 19 is extended. At this time, the primary extension 23 of the claw extension metal fitting 11 presses the primary extension abutment 3 of the claw 2, so that the claw 2 is centered on the rotation shaft 4 that is axially mounted on the upper outer end of the claw holding metal fitting 5. Spreads like a fan. This figure shows a state in the middle of the primary extension, in which the pin 31 attached to the groove 29 of the main body fitting 7 has moved from the end of the primary extension guide 25 of the claw extension fitting 11.
[0024]
FIG. 10 is an internal structural diagram for explaining an extension mechanism of the spreader for removing a door frame of the present invention, and is a state diagram at the time of starting secondary extension. In this figure as well, pressurization from the hydraulic pump 35 is performed by the extension hose 36 connected to the extension-side coupler 17 of the cylinder 16, and the cylinder 19 further extends from the state shown in FIG. At this time, since the secondary extension portion 23 of the claw extension metal fitting 11 presses the secondary extension contact portion 6 of the claw holding metal fitting 5, the claw 2 is inserted into the groove 21 of the main body fitting 7 by the slide shaft 22 of the claw holding metal fitting 5. Slides and spreads in parallel. This figure is an initial stage of the secondary expansion, and shows a state in which the pin 31 attached to the groove 29 of the main body metal fitting 7 is at the end of the secondary expansion guide 26 of the claw expansion metal fitting 11.
[0025]
FIG. 11 is an internal structural view for explaining an extension mechanism of the spreader for removing a door frame of the present invention, and is a state diagram at the time of completion of secondary extension. In this figure as well, pressurization from the hydraulic pump 35 is performed by the extension hose 36 connected to the extension-side coupler 17 of the cylinder 16, and the cylinder 19 further extends from the state shown in FIG. At this time, since the secondary extension portion 23 of the claw extension metal fitting 11 further presses the secondary extension contact portion 6 of the claw holding metal fitting 5, the claw 2 is moved in the groove 21 of the main body fitting 7 by the slide shaft of the claw holding metal fitting 5. 22 slides and spreads more parallel. This figure shows a stage in which the secondary expansion is completed, and shows a state in which the pin 31 attached to the groove 29 of the main body metal fitting 7 is at the other end of the secondary expansion guide 26 of the claw expansion metal fitting 11. Also, the pin 32 communicating with the hole 30 of the main body fitting 7 is shown at the other end of the main guide 27 of the claw extension fitting 11.
[0026]
As described above, when the door frame 34 at the work site is completely peeled off from the mortar part 38, the hydraulic pump 35 is operated in reverse to contract the rod 19 of the hydraulic cylinder 16 to narrow the claw 2 and another Perform expansion again at the site. By performing this operation along the entire circumference of the door frame 34, the door frame 34 can be peeled off from the mortar portion 38. In this work, the expansion of the claw 2 during the secondary expansion is a parallel expansion, so that the tip of the claw 2 does not slip off from the door frame 34 and does not damage the corner of the trimmed mortar portion 38. . Note that the spreader 1 for removing a door frame of the present invention can be used efficiently and safely even when used as a spreader used for rescue and other dismantling and separation work without being limited to removing a door frame.
[0027]
【The invention's effect】
As described above, by using the door frame removal spreader of the present invention to remove the steel door frame on the outer periphery of the entrance door in a reinforced concrete house such as a condominium or rental apartment, the outside of the door frame can be reduced. After the peripheral mortar is destroyed, the expansion of the claws during the secondary expansion of the spreader for removing the door frame is parallel expansion. The door frame can be effectively and neatly peeled off and removed without damaging the corner of the door. In addition, the present invention has an effect that it can be used efficiently and safely even when used as a spreader used for rescue and other dismantling and separation work without being limited to the removal of the door frame.
[Brief description of the drawings]
FIG. 1 is an external view of a spreader for removing a door frame of the present invention.
FIG. 2 is an external view of a claw and a claw holding bracket constituting a spreader for removing a door frame according to the present invention.
FIG. 3 is an external view of a main body bracket constituting the spreader for removing a door frame of the present invention.
FIG. 4 is an external view of a claw extension fitting constituting the spreader for removing a door frame of the present invention.
FIG. 5 is a main body internal mechanism diagram for explaining a primary expansion mechanism in the door frame removing spreader of the present invention.
FIG. 6 is a main body internal mechanism diagram for explaining a secondary expansion mechanism in the door frame removing spreader of the present invention.
FIG. 7 is an installation system diagram for peeling a door frame from a mortar part using the door frame removing spreader of the present invention.
FIG. 8 is an internal structural diagram for explaining an extension mechanism of the door frame removing spreader of the present invention, and is a state diagram at the time of starting primary extension.
FIG. 9 is an internal structural view for explaining an expansion mechanism of the door frame removing spreader of the present invention, and is a state diagram at the time of primary expansion.
FIG. 10 is an internal structural view for explaining an expansion mechanism of the spreader for removing a door frame of the present invention, and is a state diagram at the time of starting secondary expansion.
FIG. 11 is an internal structural view for explaining an expansion mechanism of the spreader for removing a door frame of the present invention, and is a state diagram at the time of completion of secondary expansion.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Spreader for door frame removal 2 Claw 3 Primary extension abutment part 4 Rotating shaft 5 Claw holding bracket 6 Secondary extension abutment part 7 Main body bracket 8 Grip fixing hole 9 Bolt 10 Spring 11 Claw extension bracket 12 Rod connection bracket 13 Fixation Metal fitting 14 Cylinder fixing metal 15 Fixed shaft 16 Hydraulic cylinder 17 Extension side coupler 18 Contraction side coupler 19 Rod 20 Fixing bracket 21 Groove 22 Slide shaft 23 Primary extension 24 Secondary extension 25 Primary extension guide 26 Secondary extension guide 27 Main guide 28 Reinforcement bracket 29 Groove 30 Hole 31 Pin 32 Pin 33 Door 34 Door frame 35 Hydraulic pump 36 Extension hose 37 Contraction hose 38 Mortar part

Claims (3)

戸枠(34)とモルタル部(38)の間に挿入して当該戸枠(34)とモルタル部(38)との間隙を広げるための爪(2)と、該爪(2)を一次拡張機構と二次拡張機構により広げるための爪拡張手段と、該爪拡張手段に駆動力を与えるための油圧シリンダー(16)とを本体金具(7)に係着して配設し、外部油圧ポンプ(35)による油圧シリンダー(16)のロッド(19)の伸長により戸枠(34)とモルタル部(38)との間隙を広げて戸枠(34)をモルタル部(38)より引き剥がすことができることを特徴とした、戸枠撤去用スプレッダー。A claw (2) inserted between the door frame (34) and the mortar portion (38) to widen a gap between the door frame (34) and the mortar portion (38); and a primary extension of the claw (2). A claw extending means for expanding the mechanism by the mechanism and the secondary extending mechanism, and a hydraulic cylinder (16) for applying a driving force to the claw extending means, which are engaged with the main body fitting (7) and disposed; By extending the rod (19) of the hydraulic cylinder (16) by (35), the gap between the door frame (34) and the mortar part (38) is widened and the door frame (34) can be peeled off from the mortar part (38). Spreader for door frame removal, characterized by the ability to do so. 上記爪拡張手段における一次拡張機構として、略三角形状の爪拡張金具(11)の先端部に形成された一次拡張部(23)が爪(2)の一次拡張当接部(3)を押圧することにより、爪(2)を回動軸(4)を中心に扇状に広げることができることを特徴とした、請求項1に記載の戸枠撤去用スプレッダー。As a primary extension mechanism of the nail extension means, a primary extension portion (23) formed at the tip of a substantially triangular nail extension fitting (11) presses the primary extension contact portion (3) of the nail (2). The spreader for door frame removal according to claim 1, characterized in that the pawl (2) can be spread in a fan shape about the rotation axis (4). 上記爪拡張手段における二次拡張機構として、略三角形状の爪拡張金具(11)の傾斜部における二次拡張部(24)が爪保持金具(5)の二次拡張当接部(6)を押圧することにより、爪(2)を本体金具(7)の溝(21)にて爪保持金具(5)のスライド軸(22)をスライドさせて平行に広げることができることを特徴とした、請求項1に記載の戸枠撤去用スプレッダー。As a secondary extension mechanism of the nail extension means, the secondary extension portion (24) of the inclined portion of the substantially triangular nail extension metal (11) is used as a secondary extension contact portion (6) of the nail holding metal fitting (5). By pressing, the claws (2) can be extended in parallel by sliding the slide shaft (22) of the claw holding bracket (5) in the groove (21) of the main body bracket (7). Item 2. The spreader for removing a door frame according to Item 1.
JP2002237663A 2002-07-15 2002-07-15 Spreader for door frame removal Withdrawn JP2004044355A (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015078750A (en) * 2013-10-17 2015-04-23 株式会社オグラ Hydraulically actuated device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015078750A (en) * 2013-10-17 2015-04-23 株式会社オグラ Hydraulically actuated device

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