JPS5910822B2 - cutting tools - Google Patents

Description

【発明の詳細な説明】 本発明はペンチ、ニンバ等の切断工具に関する。[Detailed description of the invention] The present invention relates to cutting tools such as pliers and nimba.

従来、ペンチ、具ツパ等の切断工具は使用によって忽ち
刃体の切刃の噛み合いにガタを生じ、切味が鈍ってしま
う。Conventionally, with use of cutting tools such as pliers and tool tweezers, the engagement of the cutting edges of the blade body suddenly becomes loose, resulting in dull cutting ability.

これは従来の切断工具の枢止部が第５図に示す如く一対
のハンドル１，２に開設した真直孔１０．２０にリベッ
ト３を嵌め、リベット先端をカシメで止めているからで
ある。This is because the pivot portion of the conventional cutting tool has a rivet 3 fitted into a straight hole 10, 20 formed in a pair of handles 1 and 2, as shown in FIG. 5, and the tip of the rivet is caulked.

従って切断時、ハンドル１，２に作用するリベットの軸
方向の力は、カシメ部３０の僅かな面積の傾斜面３１に
掛かり、傾斜面が早期の内に摩耗し、又無理な力が作用
した時にはカシメ部３０が起きて、リベット３とハンド
ル１又は２はガタが生じて刃体（図示せず）の噛み合せ
がずれ、切れ味が低下するのである。Therefore, during cutting, the axial force of the rivet acting on the handles 1 and 2 is applied to the small area of the sloped surface 31 of the caulked part 30, causing premature wear of the sloped surface and unreasonable force. Occasionally, the caulking portion 30 occurs, causing play between the rivet 3 and the handle 1 or 2, causing the blade body (not shown) to be misaligned, resulting in a decrease in sharpness.

本発明は枢止部に特別の工夫を施すことによシ、刃体の
噛み合せが長期に亘って最良の状態を保ち切れ味を損な
わない切断工具を提供するものである。The present invention provides a cutting tool in which the engagement of the blade bodies is maintained in the best condition over a long period of time and the sharpness is not impaired by applying a special design to the pivot portion.

以下図面に示す実施例に基づき本発明を具体的に説明す
る。The present invention will be specifically described below based on embodiments shown in the drawings.

第１図は本発明なニツパに実施した状況を示すが、これ
に限定されることなく、ペンチ、ラジオペンチ、プライ
ヤー等の切断工具に実施出来るのは勿論である。Although FIG. 1 shows a situation in which the present invention is applied to nippers, the present invention is not limited thereto, and it goes without saying that the invention can be applied to cutting tools such as pliers, radio pliers, and pliers.

ニッパーは公知の如く、夫々先端に内向きに刃体１１，
２１を具えた一対のハンドル１，２を刃体の近傍で枢止
している。As is well known, the nippers each have a blade body 11 facing inward at the tip.
A pair of handles 1 and 2 equipped with 21 are pivoted near the blade body.

本発明はハンドル１，２をテーパーピン４で枢止したこ
とを特徴とするものであって、第２図の如く両・・ンド
ル１，２の枢止部６に勾配が同一で且つ・・ンドル１，
２の重ね合せ面で極く僅かの段部５が生じる大小２つの
テーパ一孔１２．２２を同一軸上に開設し、両テーパ一
孔１２，２２ヘテーパーピン４を打込んで小テーパ一孔
２２とテーハーヒン４を緊密に嵌合して固定し、大テー
パ一孔１２とテーパーピン４とは回転可能に係合させる
。The present invention is characterized in that the handles 1 and 2 are pivoted by a taper pin 4, and as shown in FIG. bundle 1,
Two large and small taper holes 12 and 22 with a very slight step 5 formed on the overlapping surfaces of the two taper holes 12 and 22 are opened on the same axis, and a taper pin 4 is driven into both taper holes 12 and 22 to form a small taper hole 22. and the taper pin 4 are tightly fitted and fixed, and the large taper hole 12 and the taper pin 4 are rotatably engaged.

本実施例ではテーパ孔１２，２２の勾配は１７４０程度
とし、大テーパ一孔１２とピン４のクリアランクは約ｏ
ｏｏ２ｍｍである。In this embodiment, the slope of the taper holes 12 and 22 is about 1740, and the clear rank of the large taper hole 12 and the pin 4 is about o.
oo2mm.

又、小テーバ一孔２２側のハンドル２には、小テーパ一
孔２２先端の開口縁に面取りを施して逆錐面２３を形成
し、テーパーピン４をカシメ加工して逆錐面２３に係合
させ、一層強力にテーパーピン４の抜け止めを行なう。Further, on the handle 2 on the small tapered hole 22 side, the opening edge at the tip of the small taper hole 22 is chamfered to form an inverted conical surface 23, and the taper pin 4 is caulked to engage with the inverted conical surface 23. The taper pin 4 is more strongly prevented from coming off.

更に必要に応じて、大テーパ一孔１２の内面に油溝を開
設しても可い。Furthermore, an oil groove may be provided on the inner surface of the large taper hole 12 if necessary.

同一勾配の大小２つのテーパ一孔１２，２２を形成する
方法は各種考えられるが、例えば第３図の如く、ハンド
ル１，２を重ね合せて、一連のテーパ一孔１２．２２を
開設した後、段付きリーマー７を通して第２図の如く上
、下ノ・ンドル１，２の重ね合せ面に段部５を形成する
。Various methods can be considered to form two large and small taper holes 12, 22 with the same slope, but for example, as shown in FIG. A stepped reamer 7 is passed through the stepped reamer 7 to form a stepped portion 5 on the overlapping surfaces of the upper and lower nozzles 1 and 2 as shown in FIG.

或いは第４図の如く、・・ンドル１，２間に薄板８を挾
み、通常のリーマー７０を通した後、薄板８を外して、
両ハンドル１，２を重ね合せると、第２図に示す前記同
様の段部５が形成出来る。Or, as shown in Fig. 4, insert the thin plate 8 between the handles 1 and 2, pass it through a normal reamer 70, and then remove the thin plate 8.
When both handles 1 and 2 are overlapped, a step 5 similar to that shown in FIG. 2 can be formed.

本発明は上記の如く、一対のノ１ンドル１，２をテーパ
ーピン４で枢止したから、ピンに対して僅かの余裕があ
り回転する方の・・ンドル１は該・・ンドル１のテーパ
一孔１２全体で支承されるから、ハンドル１にテーパー
ビンの軸方向への力が作用してもガタが生じず、従って
刃体１１，２１の噛み合せがずれることもなく、長期に
亘って鋭い切れ味が保てる。In the present invention, as described above, the pair of nodles 1 and 2 are pivotally fixed by the taper pin 4, so that the one that rotates with a slight margin with respect to the pin, Since it is supported by the entire hole 12, there will be no play even if force is applied to the handle 1 in the axial direction of the tapered bottle, and therefore the blade bodies 11 and 21 will not become misaligned, and will remain sharp for a long time. Maintains sharpness.

又、テーパーピン４０打込み力の加減により、該ビン４
と大テーパ一孔１２とのクリアランスを最適に調節出来
るから、孔径に厳しい加工精度は要求されず、製作が容
易である等、幾多の優れた効果を有する。Also, depending on the driving force of the taper pin 40, the pin 4
Since the clearance between the large taper hole 12 and the large taper hole 12 can be adjusted optimally, strict machining accuracy is not required for the hole diameter, and manufacturing is easy, which has many excellent effects.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はニツパ先端部の斜面図、第２図は枢止部の断面
図、第３図、第４図はテーパ一孔の形成方法を示す説明
図、第５図は従来例の断面図である。 １．２・・・ハンドル、１１，２１・・・刃体、１２・
・・大テーパ−ＴＬ２２・・・小テーパ一孔、４・・・
テーハーピン、５・・・段部。Fig. 1 is an oblique view of the tip of the nipper, Fig. 2 is a sectional view of the pivot part, Figs. 3 and 4 are explanatory views showing the method of forming the taper hole, and Fig. 5 is a sectional view of the conventional example. It is. 1.2...handle, 11,21...blade body, 12.
...Large taper-TL22...Small taper one hole, 4...
Tehar pin, 5... step part.

Claims (1)

【特許請求の範囲】 １ 夫々先部に刃体１１，２１を形成した一対の・・ン
ドル１，２を重ね合せて枢止し、刃体１１，２１間に品
物を挾んで切断する切断工具に於で、各ハンドル１，２
の枢止部には勾配が同一で且つハンドル１，２の重ね合
せ面で極く僅かの段部５が生じる大小２つのテーパ一孔
１２，２２が同一軸上に開設され、両テーパ一孔１２，
２２にはテ，＜−ピン４が打込寸れて、小テーパ一孔２
２とテーパーピン４の先部は緊密嵌合し、大テーパ一孔
１２とテーパーピン４０大径部は回転可能に係合してい
る切断工具。 ２ テーパーピン４の先細先端はカシメている特許請求
の範囲第１項に記載の切断工具。 ３ 大テーパ一孔１２には油溝が開設されている特許請
求の範囲第１項又は第２項に記載の切断工具。[Scope of Claims] 1. A cutting tool in which a pair of handles 1 and 2 each having blade bodies 11 and 21 formed at their tips are superimposed and pivotally fixed, and an item is sandwiched between the blade bodies 11 and 21 to cut the item. At , each handle 1, 2
Two taper holes 12 and 22, large and small, with the same slope and a very slight step 5 on the overlapping surfaces of the handles 1 and 2 are opened on the same axis in the pivot part of the 12,
22 has a Te, <- pin 4 is driven in, and a small taper hole 2 is inserted.
2 and the tip of the taper pin 4 are tightly fitted, and the large taper hole 12 and the large diameter portion of the taper pin 40 are rotatably engaged. 2. The cutting tool according to claim 1, wherein the tapered tip of the taper pin 4 is caulked. 3. The cutting tool according to claim 1 or 2, wherein the large taper hole 12 has an oil groove.