JPH028696Y2

JPH028696Y2 -

Info

Publication number: JPH028696Y2
Application number: JP6806386U
Authority: JP
Priority date: 1986-05-06
Filing date: 1986-05-06
Publication date: 1990-03-01
Also published as: JPS62181372U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は歯の摩耗を少なくしたパイプレンチに
関するものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a pipe wrench with reduced tooth wear.

（従来の技術）パイプの締付け等に用いられるパイプレンチ
は、例えば実公昭50−32399号公報、実公昭44−
22631号公報や第３図に示されるように、ハンド
ルを兼ねるレンチ本体５１の頭部に丸ナツト５２
の回動により進退動できるＬ字状の上顎体５３を
揺動可能に取付けたものが普通であるが、パイプ
に咬み込むための歯５４，５５はレンチ本体５１
の先端とこれに対向する上顎体５３の内側との２
箇所に設けられており、パイプを回転させるため
に加えられる全荷重がこれらの２つの歯に集中的
に作用する構造となつているので歯５４，５５が
摩耗し易い欠点があつた。このため、パイプレン
チは焼入れ等の熱処理によつて硬化させた工具鋼
のような硬度の高い材質からなるものとされるの
が普通であるが、爆発の危険のある場所で火花を
生じない安全工具として用いられているCu−Be
合金製のパイプレンチにおいてこのような焼入れ
ができず、歯５４，５５の摩耗が大きい問題とな
つていた。(Prior art) Pipe wrenches used for tightening pipes are disclosed in, for example, Japanese Utility Model Publication No. 50-32399 and Japanese Utility Model Publication No. 44-1989.
As shown in Publication No. 22631 and FIG. 3, a round nut 52 is attached to the head of the wrench body 51 which also serves as a handle.
Usually, an L-shaped upper jaw body 53 is swingably attached to the wrench body 53, which can be moved forward and backward by the rotation of the wrench body 51.
and the inner side of the maxillary body 53 opposing this.
The teeth 54 and 55 are easily worn out because the structure is such that the entire load applied to rotate the pipe is concentrated on these two teeth. For this reason, pipe wrenches are usually made of a highly hard material such as tool steel that has been hardened through heat treatment such as quenching, but they are safe and do not generate sparks in areas where there is a risk of explosion. Cu-Be used as a tool
Pipe wrenches made of alloy cannot be hardened in this manner, and wear of the teeth 54 and 55 has become a serious problem.

（考案が解決しようとする問題点）本考案はこのような従来の問題点を解決して、
歯の摩耗が少なくCu−Be合金製とした場合にも
十分な寿命を持たせることができるパイプレンチ
を目的として完成されたものである。(Problems that the invention attempts to solve) This invention solves these conventional problems,
It was completed with the aim of producing a pipe wrench that has minimal tooth wear and can have a sufficient lifespan even when made of Cu-Be alloy.

（問題点を解決するための手段）本考案は先端に第１の歯が形成されたレンチ本
体の頭部に、第１の歯と対向する第２の歯を備え
たＬ字状の上顎体を揺動及び進退動可能に取付け
たパイプレンチにおいて、これらの第１の歯及び
第２の歯を奥が拡がる方向に傾斜させて形成する
とともに、上顎体の軸部の下面にも第３の歯を形
成したことを特徴とするものである。(Means for Solving the Problems) The present invention provides an L-shaped maxillary body that is provided with second teeth facing the first teeth on the head of the wrench body with first teeth formed at the tip. In this pipe wrench, the first tooth and the second tooth are formed to be inclined in the direction in which the back expands, and a third tooth is also formed on the lower surface of the shaft of the maxillary body. It is characterized by having teeth formed thereon.

（実施例）次に本考案を図示の実施例について詳細に説明
すると、第１図において１はハンドルを兼ねるレ
ンチ本体、２はその頭部３にピン４により枢着さ
れた支持ボツクス、５はこの支持ボツクス２に丸
ナツト６により進退動可能に取付けられたＬ字状
の上顎体である。上顎体５の軸部の後半部分には
ねじ７が形成されており、支持ボツクス２に回動
自在に設けられた丸ナツト６がこのねじ７に螺合
して丸ナツト６を回動させることにより上顎体５
を進退動できる構造となつている。レンチ本体１
の頭部３の上部には一対の案内板８，８が突設さ
れており、その内側に設けられたスプリング９が
板１０を介して上顎体５の後方部を押上げ、ピン
４を中心として上顎体５を先端が下向きとなる方
向に回転させるような回転モーメントを与えてい
る。(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. This is an L-shaped upper jaw body that is attached to this support box 2 with a round nut 6 so that it can move forward and backward. A screw 7 is formed in the rear half of the shaft portion of the maxillary body 5, and a round nut 6 rotatably provided in the support box 2 is screwed into this screw 7 to rotate the round nut 6. maxillary body 5
It has a structure that allows it to move forward and backward. Wrench body 1
A pair of guide plates 8, 8 are protruded from the upper part of the head 3, and a spring 9 provided inside the guide plates 10 pushes up the rear part of the maxillary body 5 through the plate 10. As a result, a rotational moment is applied to rotate the maxillary body 5 in a direction in which the tip thereof faces downward.

本考案においては、レンチ本体１の頭部３の先
端に第１の歯１１が形成され、この第１の歯１１
と対向する上顎体５の内面に第２の歯１２が形成
されるのであるが、これらの歯は従来の歯とは反
対に入口側が狭く、奥が拡がる方向に傾斜させて
形成してある。更にまた、本考案においては上顎
体５の軸部の下面にも第３の歯１３が形成してあ
る。これらの３つの歯１１，１２，１３は従来と
同様にレンチ本体１や上顎体５と同材質のもので
あつてもよいが、全体をCu−Be合金により製造
した安全工具の場合には歯１１，１２，１３を植
え歯として交換可能なものとすることが好まし
く、またこれらの歯をセラミツク製の歯としてお
くことが更に好ましい。 In the present invention, the first tooth 11 is formed at the tip of the head 3 of the wrench body 1, and the first tooth 11
Second teeth 12 are formed on the inner surface of the maxillary body 5 facing the maxillary body 5, but these teeth are formed to be narrow on the entrance side and inclined in the direction of widening at the back, contrary to conventional teeth. Furthermore, in the present invention, third teeth 13 are also formed on the lower surface of the shaft portion of the upper jaw body 5. These three teeth 11, 12, 13 may be made of the same material as the wrench body 1 and the upper jaw body 5 as in the past, but in the case of a safety tool made entirely of Cu-Be alloy, the teeth Preferably, teeth 11, 12, and 13 are replaceable as implants, and it is more preferable that these teeth are made of ceramic.

第１図に示した実施例はピン４を中心として上
顎体５を揺動可能とした形式のものであるが、第
２図に示すように丸ナツト６及び上顎体５のねじ
７の部分がレンチ本体１の支持部１４に対して十
分なガタを持たせて取付けられており、これによ
つて上顎体５を所定範囲にわたり揺動できるよう
にした形式を採用してもよく、この場合にもその
他の構成は第１の実施例と変るところはないの
で、対応する部分に同一の符号を付して説明を省
略する。 The embodiment shown in FIG. 1 is of a type in which the maxillary body 5 can swing around a pin 4, but as shown in FIG. It is also possible to adopt a format in which the wrench body 1 is attached to the support part 14 with sufficient play, thereby allowing the upper jaw body 5 to swing over a predetermined range. Since the other configurations are the same as those of the first embodiment, corresponding parts are given the same reference numerals and a description thereof will be omitted.

（作用）このように構成されたものは、丸ナツト６を操
作して上顎体５を前方へ進出させて第１の歯１１
と第２の歯１２との間にパイプ３０を挟んだう
え、レンチ本体１を上下動させてレンチ本体１を
下動させたときパイプ３０に歯を咬み込ませてパ
イプ３０を回転させ、レンチ本体を上動させたと
きには上顎体５の歯の咬み込みが緩む方向に揺動
させてレンチ本体１及び上顎体５をパイプ３０に
対して回転させつつ次第にパイプ３０を回転させ
るものであることは従来のパイプレンチと同様で
ある。しかし本考案において第１の歯１１と第２
の歯１２とが従来とは逆に奥が拡がる方向に傾斜
させてあるので、レンチ本体１を下動させたとき
には第１の歯１１と第２の歯１２とがパイプ３０
を図面の上方へ押上げる作用を生じ、しかも上顎
体５の軸部の下面には第３の歯１３が形成されて
いるので、パイプ３０はこれらの３枚の歯によつ
て３点で支持されながら回転されることとなる。
従つて各歯に作用する力は従来のパイプレンチよ
りも大幅に減少し、歯の摩耗量も大幅に減少させ
ることができるうえ、パイプ３０の外表面の歯の
咬込みによる傷付きも減少することとなる。本考
案は特に、パイプレンチ全体を火花の出ないCu
−Be合金により形成した場合に有利であり、ま
た第１、第２、第３の歯を硬度の大きいセラミツ
ク製の植え歯として容易に交換できるようにして
おけば更に優れた効果を得ることができる。(Function) With this structure, the upper jaw body 5 is moved forward by operating the round nut 6, and the first tooth 11 is moved forward.
and the second teeth 12, and when the wrench main body 1 is moved up and down and the wrench main body 1 is moved down, the pipe 30 is rotated by biting the teeth into the wrench. When the main body is moved upward, the wrench main body 1 and the maxillary body 5 are rotated with respect to the pipe 30 by swinging in the direction in which the teeth of the upper jaw body 5 are loosened, and the pipe 30 is gradually rotated. It is similar to a conventional pipe wrench. However, in the present invention, the first tooth 11 and the second tooth
Since the teeth 12 are inclined in the direction in which the rear side widens, contrary to the conventional case, when the wrench main body 1 is moved down, the first teeth 11 and the second teeth 12 are aligned with the pipe 30.
Moreover, since the third teeth 13 are formed on the lower surface of the shaft of the upper jaw body 5, the pipe 30 is supported at three points by these three teeth. It will be rotated while being rotated.
Therefore, the force acting on each tooth is significantly reduced compared to conventional pipe wrenches, and the amount of wear on the teeth is also significantly reduced, as well as damage caused by teeth biting on the outer surface of the pipe 30. That will happen. In particular, this invention is designed to use spark-free Cu for the entire pipe wrench.
-It is advantageous to form the teeth with Be alloy, and even better effects can be obtained if the first, second, and third teeth are made of hard ceramic implants that can be easily replaced. can.

（考案の効果）本考案は以上の説明からも明らかなように、３
枚の歯を設けることにより歯の摩耗量を減少させ
るとともにパイプの回転をより確実に行わせるこ
とができるのであり、Cu−Be製の安全工具に利
用した場合に優れた効果を生ずるものである。よ
つて本考案は従来の問題点を解消したものとし
て、その実用的価値は極めて大きいものである。(Effects of the invention) As is clear from the above explanation, the invention has three
Providing two teeth reduces the amount of wear on the teeth and allows the pipe to rotate more reliably, which produces excellent effects when used in Cu-Be safety tools. . Therefore, the present invention has extremely great practical value as it solves the conventional problems.

[Brief explanation of the drawing]

第１図は本考案の第１の実施例を示す正面図、
第２図は本考案の第２の実施例を示す正面図、第
３図は従来例を示す正面図である。１……レンチ本体、５……上顎体、１１……第
１の歯、１２……第２の歯、１３……第３の歯。 FIG. 1 is a front view showing the first embodiment of the present invention;
FIG. 2 is a front view showing a second embodiment of the present invention, and FIG. 3 is a front view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Wrench body, 5... Upper jaw body, 11... First tooth, 12... Second tooth, 13... Third tooth.

Claims

[Claims for Utility Model Registration] 1. An L-shaped maxillary body having a head portion of a wrench body 1 having a first tooth 11 formed at its tip, and a second tooth 12 facing the first tooth 11. In this pipe wrench, the first tooth 11 and the second tooth 12 are formed so as to be inclined in the direction in which the back expands. A pipe wrench characterized in that a third tooth 13 is also formed. 2. The pipe wrench according to claim 1, in which the parts of the pipe wrench except for the teeth are made of a Cu-Be alloy. 3 First tooth 11, second tooth 12, third tooth 13
The pipe wrench according to claim 1 or 2, wherein the pipe wrench is a ceramic implant.