JP2000130419A - Pin slipping out preventing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pin slipping out preventing structure in which a pin may not be slipped out and lost, a structure to be machined is simple and small, and the pin slipping out preventing structure can be added even later. SOLUTION: In a locking structure including one side first plate member 1 having an insert hole, the other side second plate member 2 having an insert hole, and a pin 3 inserted in the respective overlapped insert holes from one side toward the other side, an additionally arranged plate member 5 is arranged which is additionally arranged on one side of the first plate member 1, has an enlarged hole part 4 opened in the other side and has an insert hole in which the pin 3 is inserted, a necking part 6 which is so machined that length L from the end to the step difference part 6A of the pin 3 is set to length less than the plate thickness (t) of the first plate member 1, has a step difference part 6A on its end side and has an enlarged part 6B on its base end side, is formed in the end part of the pin 3, and an annular elastic member 7 is arranged which is fitted in the enlarged hole part 4 and fitted around the necking part 6 when the pin 3 is pulled out.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ピンの抜け止め構
造に係り、さらに詳しくは高所作業等で圧着工具のダイ
スヘッド等を交換する場合に、ピンの脱落や紛失のない
ピンの抜け止め構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin retaining structure, and more particularly, to a pin retaining member which does not fall off or is lost when a die head or the like of a crimping tool is replaced at a high place or the like. Regarding the structure.

【０００２】[0002]

【従来の技術】ピンは、孔に差し込んで継手、位置決
め、ネジ回り止めなどの目的に用いる丸形又は角形の棒
状又は筒状の部品であり、二つの要素や部品の接合に使
用し、また、接合部が自由に回転できるようにする場所
に広く使用されている。しかしながら、高所作業等で従
来のピンの抜け止め構造を持った圧着工具のダイスヘッ
ド等を交換する場合は、ピンの脱落や紛失が発生し易い
ことが問題とされていた。2. Description of the Related Art A pin is a round or square rod-shaped or cylindrical part that is inserted into a hole and used for purposes such as joints, positioning, and screw rotation, and is used for joining two elements or parts. Widely used, where the joints can rotate freely. However, when exchanging a die head or the like of a conventional crimping tool having a pin retaining structure at a high place or the like, there has been a problem that the pins are likely to fall off or be lost.

【０００３】従来のピンの抜け止め構造について図６に
基づいて説明する。図６（ａ）はゴム製のＯリング１１
０を使用したピンの挿着時の抜け止め構造を示すもので
ある。同図において、ピン１００は、基端側から先端側
に第一逆円錐台部１０１と、第一逆円錐台部１０１の上
部に径を同じくして連なるピン孔の径より大径の大円柱
部１０２と、大円柱部１０２の上部に連なるピン孔の径
より小径の第一小円柱部１０３と、第一小円柱部１０３
の上部に連なるピン孔に密接嵌合する径の第一中円柱部
１０４と、第一中円柱部１０４の上部に径を同じくして
連なる第一円錐台部１０５と、第一円錐台部１０５の上
部に連なるピン孔の径より小径の第二小円柱部１０６
と、第二小円柱部１０６の上部に連なる第二逆円錐台部
１０７と、第二逆円錐台部１０７の上部に径を同じくし
て連なるピン孔に密接嵌合する径の第二中円柱部１０８
と、第二中円柱部１０８の上部に径を同じくして連なる
第二円錐台部１０９の先頭部とを連接して構成されてい
る。このピン１００を、第二板材１１１の挿入孔と、第
二板材１１１の後端部を挾持する第一板材１１２の挿入
孔と第三板材１１３の挿入孔を重合して形成されるピン
の挿入孔１１４に挿入して、第三板材１１３側に突出す
るくびれ部の最も細い第二小円柱部１０６にゴム製のＯ
リング１１０を装着しピンの抜け止め構造を構成してい
る。このように、従来の抜け止め構造は、ピンの挿入孔
１１４にピン１００を係止する構成がなかった。A conventional pin retaining structure will be described with reference to FIG. FIG. 6A shows a rubber O-ring 11.
9 shows a retaining structure at the time of insertion of a pin using No. 0. In the figure, a pin 100 has a first inverted truncated cone portion 101 from the base end side to the distal end side, and a large cylinder having a diameter larger than the diameter of a pin hole connected to the upper portion of the first inverted truncated cone portion 101 with the same diameter. Part 102, a first small cylindrical part 103 having a diameter smaller than the diameter of the pin hole connected to the upper part of the large cylindrical part 102, and a first small cylindrical part 103
A first middle cylindrical portion 104 having a diameter closely fitted to a pin hole connected to an upper portion of the first cylindrical portion; a first truncated cone portion 105 having the same diameter as the upper portion of the first middle cylindrical portion 104; Second cylindrical portion 106 having a diameter smaller than the diameter of the pin hole connected to the upper part of
And a second inverted truncated cone portion 107 connected to the upper portion of the second small cylindrical portion 106, and a second middle cylinder having a diameter closely fitted to a pin hole connected to the upper portion of the second inverted frustoconical portion 107 with the same diameter. Part 108
And a top portion of a second truncated cone portion 109 connected to the upper portion of the second middle cylindrical portion 108 with the same diameter. This pin 100 is inserted into a pin formed by overlapping the insertion hole of the second plate 111, the insertion hole of the first plate 112 and the insertion hole of the third plate 113 which sandwich the rear end of the second plate 111. A rubber O 2 is inserted into the hole 114 and the second small cylindrical portion 106 having the narrowest narrow portion protruding toward the third plate 113.
The ring 110 is mounted to constitute a pin retaining structure. As described above, the conventional retaining structure does not have a configuration in which the pin 100 is locked in the pin insertion hole 114.

【０００４】次に図７に基づいて、上記のようなピンの
抜け止め構造をダイスヘッドの枢着軸１２０Ａ，１２０
Ｂに適用した圧着工具を説明する。工具ボディに取り付
けたフレ−ム１１５にピストン１１６を中心にして上下
に枢着した一対のリンクロッド１１８Ａ，１１８Ｂと、
ピストン１１６の先端部に取り付けた連結板１１７と、
連結材１２２で組み合わされた一対のダイスヘッド１２
１Ａ，１２１Ｂの後端部とを、上下一対の他側三角リン
ク板１１９Ａ，１１９Ｂ及び一側三角リンク板１１９
Ａ′，１１９Ｂ′の頂点に、それぞれ着脱可能に枢着す
ることにより連結してなるリンク機構からなるところの
圧着工具である。Next, based on FIG. 7, a pin retaining structure as described above is provided with a pivot shaft 120A, 120 of a die head.
The crimping tool applied to B will be described. A pair of link rods 118A and 118B pivotally mounted on a frame 115 attached to the tool body up and down around a piston 116;
A connecting plate 117 attached to the tip of the piston 116;
A pair of die heads 12 combined with a connecting member 122
1A and 121B are connected to the upper and lower pairs of other triangular link plates 119A and 119B and the one triangular link plate 119.
This is a crimping tool comprising a link mechanism which is connected to the vertices of A 'and 119B' by being detachably connected to each other.

【０００５】次に、これらの動作について述べる。図示
しない油圧ポンプ等を操作してピストン１１６を前進駆
動させると、連結板１１７が前進する。リンクロッド１
１８Ａ，１１８Ｂはフレ−ム１１５に拘束されるので、
連結板１１７の前進に伴って、他側三角リンク板１１９
Ａ，１１９Ｂ及び一側三角リンク板１１９Ａ′，１１９
Ｂ′はリンクロッド１１８Ａ，１１８Ｂとの枢着軸１２
４、枢着軸１２７を支点として外回りに回動する。従っ
て、一対の他側三角リンク板１１９Ａ，１１９Ｂ及び一
側三角リンク板１１９Ａ′，１１９Ｂ′はダイスヘッド
１２１Ａ，１２１Ｂとの枢着軸１２０Ａ，１２０Ｂ同士
を離間し、一方、ダイスヘッド１２１Ａ，１２１Ｂは連
結板１２２に拘束されるので、ダイスヘッド１２１Ａ，
１２１Ｂ前部の圧着ダイス部１２３Ａ，１２３Ｂは枢着
軸１２０Ａ，１２０Ｂを中心に閉じる方向に回動し、電
線等の圧着動作をする。図７はこの状態を示す。圧着終
了後、ピストン１１６を後退させると、連結板１１７が
後退し、この連結板１１７に枢着された他側三角リンク
板１１９Ａ，１１９Ｂ及び一側三角リンク板１１９
Ａ′，１１９Ｂ′の枢着軸１２５，枢着軸１２６が後退
するので、他側三角リンク板１１９Ａ，１１９Ｂ及び一
側三角リンク板１１９Ａ′，１１９Ｂ′は内回りに回動
し、従って一対の他側三角リンク板１１９Ａ，１１９Ｂ
及び一側三角リンク板１１９Ａ′，１１９Ｂ′はダイス
ヘッド１２１Ａ，１２１Ｂとの枢着軸１２０Ａ，１２０
Ｂ同士を接近し、一方、ダイスヘッド１２１Ａ，１２１
Ｂ前部の圧着ダイス部１２３Ａ，１２３Ｂは開く方向に
回動し、圧着動作を開放する。Next, these operations will be described. When the piston 116 is driven forward by operating a hydraulic pump or the like (not shown), the connecting plate 117 moves forward. Link rod 1
Since 18A and 118B are restrained by the frame 115,
As the connecting plate 117 advances, the other-side triangular link plate 119
A, 119B and one-sided triangular link plates 119A ', 119
B ′ is a pivot shaft 12 with the link rods 118A and 118B.
4. Rotate outward with the pivot 127 as a fulcrum. Therefore, the pair of other-side triangular link plates 119A and 119B and the one-side triangular link plates 119A 'and 119B' separate the pivot shafts 120A and 120B from the die heads 121A and 121B, while the dice heads 121A and 121B are separated from each other. Since the die head 121A,
The crimping dies 123A and 123B at the front of the 121B rotate around the pivot shafts 120A and 120B in the closing direction to perform crimping operation of electric wires and the like. FIG. 7 shows this state. When the piston 116 is retracted after the crimping, the connecting plate 117 is retracted, and the other-side triangular link plates 119A and 119B and the one-side triangular link plate 119 pivotally attached to the connecting plate 117.
Since the pivot shafts 125 and 126 of A 'and 119B' are retracted, the other-side triangular link plates 119A and 119B and the one-side triangular link plates 119A 'and 119B' rotate inward, so that a pair of other triangular link plates 119A and 119B 'rotate inward. Side triangular link plates 119A, 119B
And one-sided triangular link plates 119A 'and 119B' are pivotally connected to die heads 121A and 121B.
B approach each other, while the die heads 121A, 121
The crimping dies 123A and 123B at the front part B rotate in the opening direction to release the crimping operation.

【０００６】しかしながら、ダイスヘッドの枢着軸１２
０Ａ，１２０Ｂに従来のピンの抜け止め構造を適用した
圧着工具では、ピン１００を抜き出す場合に、図６
（ｂ）に示すように、挿入孔１１４内にピン１００が位
置する状態では、ピンの挿入孔１１４の内壁を、圧縮さ
れたゴム製Ｏリング１１０が弾性力で押すことによりピ
ン１００を挿入孔１１４内で保持できる。しかし、一
度、挿入孔からピン１００を抜き出してしまうと、ピン
の挿入孔１１４からピン１００が完全に抜けてしまうた
め、ピン１００の脱落やピン１００の紛失の問題があっ
た。However, the pivot 12 of the die head
In a crimping tool in which a conventional pin retaining structure is applied to the pins 0A and 120B, when the pin 100 is pulled out, FIG.
As shown in (b), when the pin 100 is positioned in the insertion hole 114, the pin 100 is pressed by the compressed rubber O-ring 110 against the inner wall of the pin insertion hole 114 by elastic force. 114. However, once the pin 100 is pulled out from the insertion hole, the pin 100 is completely pulled out from the insertion hole 114 of the pin, so that there is a problem that the pin 100 drops or the pin 100 is lost.

【０００７】そこで、図８（ａ）のように左端部が二股
に分かれた第四板材１４０の左端面下部に、ピン１２９
の脱落防止手段用の溝穴１２８を、左端面からピンの挿
入孔１４３を経て右端方向に中間板材１３９の略右端近
く迄穿設して、コイルばね１４１と溝穴１２８より小径
の小円柱片１４２とからなるピンの脱落防止手段を内装
したものがあった。同図において、ピン１２９は、基端
側から先端側に第一逆円錐台部１３０と、第一逆円錐台
部１３０の上部に径を同じくして連なるピン孔の径より
大径の大円柱部１３１と、大円柱部１３１の上部に連な
るピン孔の径に密接嵌合する径の第一中円柱部１３２
と、第一中円柱部１３２の上部に連なるピン孔の径より
小径の第一小円柱部１３３と、第一小円柱部１３３の上
部に径を同じくして連なる第二逆円錐台部１３４と、第
二逆円錐台部１３４の上部に径を同じくして連なるピン
孔に密接嵌合する径の第二中円柱部１３５と、第二中円
柱部１３５の上部に径を同じくして連なる第一円錐台部
１３６と、第一円錐台部１３６の上部に径を同じくして
連なるピン孔の径より小径の第二小円柱部１３７と、第
二小円柱部１３７の上部に連なるピン孔の径と密接嵌合
する径を最大径とする逆椀状の先頭部１３８と、から構
成されている。この抜け止め構造において、ピン１２９
を抜き出す時は、図８（ｂ）に示すように、コイルばね
１４１に付勢された小円柱片１４２がピンのくびれ部の
最細部である第二小円柱部１３７を固定するのでピン１
２９の脱落防止は可能となる。Therefore, as shown in FIG. 8 (a), a pin 129 is provided on the lower part of the left end surface of the fourth plate member 140 whose left end is forked.
A hole 128 for drop-out prevention means is drilled from the left end face to the right end direction through the pin insertion hole 143 to near the right end of the intermediate plate 139, and a small cylindrical piece smaller in diameter than the coil spring 141 and the slot 128. In some cases, a means for preventing a pin from falling off is provided. In the figure, a pin 129 has a first inverted truncated cone portion 130 from the base end side to the tip end side, and a large cylinder having a diameter larger than the diameter of a pin hole connected to the upper portion of the first inverted truncated cone portion 130 with the same diameter. Part 131 and a first middle cylindrical part 132 having a diameter closely fitted to the diameter of the pin hole connected to the upper part of the large cylindrical part 131.
A first small cylindrical portion 133 having a diameter smaller than the diameter of the pin hole connected to the upper portion of the first middle cylindrical portion 132, and a second inverted truncated cone portion 134 having the same diameter as the upper portion of the first small cylindrical portion 133. A second middle cylindrical portion 135 having a diameter closely fitted to a pin hole connected to the upper portion of the second inverted truncated cone portion 134 with the same diameter, and a second middle cylindrical portion 135 having the same diameter as the upper portion of the second middle cylindrical portion 135. One frustoconical portion 136, a second small cylindrical portion 137 having a diameter smaller than the diameter of the pin hole connected to the upper portion of the first frustoconical portion 136, and a pin hole connected to the upper portion of the second small cylindrical portion 137. And an inverted bowl-shaped head portion 138 having a maximum diameter that closely fits the diameter. In this retaining structure, the pin 129
As shown in FIG. 8B, the small cylindrical piece 142 urged by the coil spring 141 fixes the second small cylindrical portion 137 which is the finest part of the pin constriction, as shown in FIG.
29 can be prevented from falling off.

【０００８】[0008]

【発明が解決しようとする課題】しかしながら、上述し
たピンの抜け止め構造は、溝穴１２８の加工に手間が掛
かりすぎたり、当初より第四板材１４０に加工を施す必
要があり、後からピン１２９の抜け止め構造の追加がで
きないという問題があった。また、溝穴１２８を設ける
ため肉厚の板材が必要となるのでピンの長さも長くする
必要があり、部品全体が大きくなるという問題があっ
た。However, in the above-described pin retaining structure, the processing of the slot 128 requires too much work, or the fourth plate 140 needs to be processed from the beginning, and the pin 129 is required later. There was a problem that it was not possible to add a retaining structure. In addition, since a thick plate material is required to provide the slot 128, the length of the pin needs to be increased, and there is a problem that the entire component becomes large.

【０００９】本発明は、以上の問題を解決するためにな
されたものであって、高所作業等で圧着工具のダイスヘ
ッド等を交換する場合に、ピンの脱落や紛失がなく、加
工する構造が簡単で小型であり、後からでもピンの抜け
止め構造を追加できるピンの抜け止め構造およびその抜
け止め構造を適用した圧着工具を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a structure in which a pin is not dropped or lost and a processing is performed when a die head or the like of a crimping tool is replaced at a high place or the like. It is an object of the present invention to provide a pin retaining structure which is simple and compact, and can be added with a pin retaining structure even afterwards, and a crimping tool to which the retaining structure is applied.

【００１０】[0010]

【課題を解決するための手段】請求項１に記載の発明の
要旨とするところは、挿入孔を有する一側の第一板材
と、挿入孔を有する他側の第二板材と、重なり合う前記
各挿入孔に一側から他側に向けて挿入されるピンと、を
含む係止構造において、前記第一板材の一側に添設さ
れ、他側に拡大穴部が穿設され前記ピンが挿入される挿
入孔を有する添設板材と、前記ピンはその先端部に、先
端からピンの段差部までの長さが前記第一板材の板厚以
下の長さとなるように加工された、先端側に前記段差部
を有し基端側に拡径部を有するくびれ部を形成し、前記
拡大穴部に嵌設され、前記ピンの抜き出し時に前記くび
れ部に嵌着される環状弾性部材と、を含むことを特徴と
するものである。The gist of the present invention is that each of the first plate having an insertion hole and the second plate having an insertion hole overlap each other. A pin inserted into the insertion hole from one side toward the other side, wherein the pin is inserted by being attached to one side of the first plate member and an enlarged hole portion being drilled on the other side. Attached plate material having an insertion hole, and the pin is formed at a tip end thereof such that a length from a tip to a step portion of the pin is equal to or less than a plate thickness of the first plate material. An annular elastic member having a stepped portion and a constricted portion having an enlarged diameter portion on a base end side, fitted in the enlarged hole portion, and fitted to the constricted portion when the pin is extracted. It is characterized by the following.

【００１１】請求項２に記載の発明の要旨とするところ
は、挿入孔を有する一側の第一板材と、挿入孔を有する
他側の第二板材と、重なり合う前記各挿入孔に一側から
他側に向けて挿入されるピンと、を含む係止構造におい
て、前記第一板材の一側に拡大穴部が穿設される前記挿
入孔を有する第一板材と、前記第一板材の一側に添設さ
れ、前記ピンが挿入される挿入孔を有する添設板材と、
前記ピンはその先端部に、先端からピンの段差部までの
長さと前記拡大穴部の深さを加えた長さが前記第一板材
の板厚以下の長さとなるように加工された、先端側に前
記段差部を有し基端側に拡径部を有するくびれ部を形成
し、前記拡大穴部に嵌設され、前記ピンの抜き出し時に
前記くびれ部に嵌着される環状弾性部材と、を含むこと
を特徴とするものである。The gist of the invention according to claim 2 is that one side of the first plate having an insertion hole and the other side of the second plate having an insertion hole are overlapped with each of the insertion holes from one side. A pin inserted toward the other side, a first plate having the insertion hole in which an enlarged hole is formed on one side of the first plate, and a side of the first plate. And an additional plate member having an insertion hole into which the pin is inserted,
The end of the pin is processed so that the length obtained by adding the length from the tip to the step portion of the pin and the depth of the enlarged hole is equal to or less than the thickness of the first plate material. An annular elastic member that has a stepped portion on the side and has a constricted portion having an enlarged diameter portion on the base end side, is fitted in the enlarged hole portion, and is fitted to the constricted portion when the pin is pulled out, It is characterized by including.

【００１２】請求項３に記載の発明の要旨とするところ
は、挿入孔を有する一側の第一板材と、挿入孔を有する
中間の第二板材と、挿入孔を有する他側の第三板材と、
重なり合う前記各挿入孔に一側から他側に向けて挿入さ
れるピンと、を含む係止構造において、前記第一板材の
一側に添設され、他側に拡大穴部が穿設され前記ピンが
挿入される挿入孔を有する添設板材と、前記ピンはその
先端部に、先端からピンの段差部までの長さが前記第一
板材の板厚以下の長さとなるように加工された、先端側
に前記段差部を有し基端側に拡径部を有するくびれ部を
形成し、前記拡大穴部に嵌設され、前記ピンの抜き出し
時に前記くびれ部に嵌着される環状弾性部材と、を含む
ことを特徴とするものである。The gist of the invention according to claim 3 is that one side of the first plate having an insertion hole, an intermediate second plate having an insertion hole, and the other third plate having an insertion hole. When,
And a pin inserted from one side to the other side in each of the overlapping insertion holes, wherein the pin is attached to one side of the first plate member, and an enlarged hole is formed in the other side. An additional plate material having an insertion hole into which the pin is inserted, and the pin is processed at its tip end so that the length from the tip to the step portion of the pin is equal to or less than the plate thickness of the first plate material, An annular elastic member that has a stepped portion at the distal end side and has a constricted portion having an enlarged diameter portion on the base end side, is fitted in the enlarged hole portion, and is fitted to the constricted portion when the pin is pulled out; , Is included.

【００１３】請求項４に記載の発明の要旨とするところ
は、挿入孔を有する一側の第一板材と、挿入孔を有する
中間の第二板材と、挿入孔を有する他側の第三板材と、
重なり合う前記各挿入孔に一側から他側に向けて挿入さ
れるピンと、を含む係止構造において、前記第一板材の
一側に拡大穴部が穿設される前記挿入孔を有する第一板
材と、前記第一板材の一側に添設され、ピンが挿入され
る挿入孔を有する添設板材と、前記ピンはその先端部
に、先端からピンの段差部までの長さと前記拡大穴部の
深さを加えた長さが前記第一板材の板厚以下の長さとな
るように加工された、先端側に前記段差部を有し基端側
に拡径部を有するくびれ部を形成し、前記拡大穴部に嵌
設され、前記ピンの抜き出し時に前記くびれ部に嵌着さ
れる環状弾性部材と、を含むことを特徴とするものであ
る。[0013] The gist of the invention according to claim 4 is that one side first plate having an insertion hole, an intermediate second plate having an insertion hole, and another third plate having an insertion hole. When,
A pin inserted from one side to the other side into each of the overlapping insertion holes, wherein the first plate member has the insertion hole in which an enlarged hole is formed on one side of the first plate member. And an additional plate attached to one side of the first plate and having an insertion hole into which the pin is inserted; and the pin has a tip portion having a length from the tip to a step portion of the pin and the enlarged hole portion. Forming a constricted portion having the stepped portion on the distal end side and the enlarged diameter portion on the base end side, which is processed so that the length to which the depth is added is equal to or less than the thickness of the first plate material. An annular elastic member fitted into the enlarged hole and fitted into the constricted portion when the pin is pulled out.

【００１４】請求項５に記載の発明の要旨とするところ
は、工具ボディの前部に取り付けたフレ−ムに、ピスト
ンを中心にして上下に枢着した一対のリンクロッドと、
ピストンの先端部に取り付けた連結板と、一対のダイス
ヘッドの後端部とを、一対の三角リンク板の各頂点部に
ピンによりそれぞれ着脱可能に枢着することにより連結
してなるリンク機構を利用して、ピストンの往復動を一
対のダイスヘッドの回転に変換して、はさみ形式の圧着
を行う圧着工具において、前記ダイスヘッドの後端部を
着脱可能に枢着するピンの抜け止め構造は、前記一側三
角リンク板の一側に添設され、他側にリングばね用溝穴
が穿設され前記ピンが挿入される挿入孔を有する添設三
角リンク板と、前記ピンはその先端部に、先端からピン
の段差部までの長さが前記一側三角リンク板の板厚以下
の長さとなるように加工された、先端側に前記段差部を
有し基端側に拡径部を有するくびれ部を形成し、前記リ
ングばね用溝穴に嵌設され、前記ピンの抜き出し時に前
記くびれ部に嵌着されるリングばねと、を備えているこ
とを特徴とするものである。According to a fifth aspect of the present invention, there is provided a frame attached to a front portion of a tool body, a pair of link rods pivoted vertically about a piston,
A link mechanism is provided by connecting the connecting plate attached to the tip of the piston and the rear end of the pair of die heads to each apex of the pair of triangular link plates by detachably pivotally connecting them with pins. Utilizing, a reciprocating motion of the piston is converted into rotation of a pair of die heads, and in a crimping tool for performing scissor-type crimping, a pin retaining structure for detachably pivoting the rear end of the die head is provided. An attached triangular link plate attached to one side of the one-sided triangular link plate and having an insertion hole in which a ring spring slot is drilled on the other side and into which the pin is inserted; In addition, the length from the tip to the step portion of the pin is processed so that the length is equal to or less than the thickness of the one-sided triangular link plate. Forming a constricted portion having a ring spring slot. It is set, and is characterized in that it comprises a and a ring spring is fitted on the constricted portion at the time of extraction of the pin.

【００１５】請求項６に記載の発明の要旨とするところ
は、工具ボディの前部に取り付けたフレ−ムに、ピスト
ンを中心にして上下に枢着した一対のリンクロッドと、
ピストンの先端部に取り付けた連結板と、一対のダイス
ヘッドの後端部とを、一対の三角リンク板の各頂点部に
ピンによりそれぞれ着脱可能に枢着することにより連結
してなるリンク機構を利用して、ピストンの往復動を一
対のダイスヘッドの回転に変換して、はさみ形式の圧着
を行う圧着工具において、前記ダイスヘッドの後端部を
着脱可能に枢着するピンの抜け止め構造は、前記三角リ
ンク板の一側にリングばね用溝穴が穿設され、他側にピ
ンが挿入される挿入孔を有する一側三角リンク板と、前
記一側三角リンク板の一側に添設され、前記ピンが挿入
される挿入孔を有する添設三角リンク板と、前記ピンは
その先端部、先端からピンの段差部までの長さと前記リ
ングばね用溝穴の深さを加えた長さが前記一側三角リン
ク板の板厚以下の長さとなるように加工された、先端側
に前記段差部を有し基端側に拡径部を有するくびれ部を
形成し、前記リングばね用溝穴に嵌設され、前記ピンの
抜き出し時に前記くびれ部に嵌着されるリングばねと、
を備えていることを特徴とするものである。The gist of the invention according to claim 6 is that a pair of link rods pivotally mounted on a frame attached to a front portion of a tool body up and down around a piston,
A link mechanism is provided by connecting the connecting plate attached to the tip of the piston and the rear end of the pair of die heads to each apex of the pair of triangular link plates by detachably pivotally connecting them with pins. Utilizing, the reciprocating motion of the piston is converted into rotation of a pair of die heads, and in a crimping tool for performing scissor-type crimping, a pin retaining structure for detachably pivoting the rear end of the die head is provided. A triangular link plate having a ring spring slot formed on one side thereof and an insertion hole into which a pin is inserted on the other side; and a triangular link plate attached to one side of the triangular link plate. An attached triangular link plate having an insertion hole into which the pin is inserted, and the tip of the pin, the length from the tip to the step of the pin plus the depth of the ring spring slot. Is less than the thickness of the one-sided triangular link plate Forming a constricted part having the stepped part on the distal end side and an enlarged diameter part on the base end side, and fitted into the groove for the ring spring, and the constriction when the pin is pulled out. A ring spring fitted to the part,
It is characterized by having.

【００１６】[0016]

【発明の実施の形態】以下、本発明であるピンの抜け止
め構造の実施の形態について図に基づいて詳しく説明す
る。図１（ａ）は、本発明の第一実施の形態であるピン
の抜け止め構造の縦断面図、図１（ｂ）は、本発明の第
一実施の形態であるピンを抜き取る状態を示す縦断面
図、図２（ａ）は、本発明の第二実施の形態であるピン
の抜け止め構造の縦断面図、図２（ｂ）は、本発明の第
二実施の形態であるピンを抜き取る状態を示す縦断面
図、図３（ａ）は、本発明の第三実施の形態であるピン
の抜け止め構造の縦断面図、図３（ｂ）は、本発明の第
三実施の形態であるピンを抜き取る状態を示す縦断面
図、図４（ａ）は、本発明の第四実施の形態であるピン
の抜け止め構造の縦断面図、図４（ｂ）は、本発明の第
四実施の形態であるピンを抜き取る状態を示す縦断面
図、図５は、本発明の第三実施の形態であるピンの抜け
止め構造を適用した圧着工具の他側から見た平面図であ
る。なお、前記各縦断面図において、「一側」とは下側
を指し、「他側」とは上側を指すものとする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pin retaining structure according to the present invention will be described below in detail with reference to the drawings. FIG. 1A is a longitudinal sectional view of a pin retaining structure according to a first embodiment of the present invention, and FIG. 1B shows a state in which the pin according to the first embodiment of the present invention is removed. FIG. 2A is a longitudinal sectional view of a pin retaining structure according to a second embodiment of the present invention, and FIG. 2B is a diagram illustrating a pin according to a second embodiment of the present invention. FIG. 3A is a longitudinal sectional view showing a state in which the pin is removed, FIG. 3A is a longitudinal sectional view of a pin retaining structure according to a third embodiment of the present invention, and FIG. 3B is a third embodiment of the present invention. FIG. 4A is a longitudinal sectional view of a pin retaining structure according to a fourth embodiment of the present invention, and FIG. 4B is a longitudinal sectional view of a pin retaining structure according to a fourth embodiment of the present invention. FIG. 5 is a longitudinal sectional view showing a state where a pin is removed according to a fourth embodiment. FIG. 5 is a view showing a crimping tool to which a pin retaining structure according to a third embodiment of the present invention is applied. It is a plan view seen from the side. In each of the longitudinal sectional views, “one side” indicates a lower side, and “other side” indicates an upper side.

【００１７】本発明の第一実施の形態であるピンの抜け
止め構造は、図１（ａ）に示すように、挿入孔を有する
第一板材１と挿入孔を有する第二板材２の各挿入孔を重
合させて一側から他側に向けて挿入するピン３と、第一
板材１の一側に添設される添設板材５と、ピン３の先端
部に形成されるくびれ部６と、前記添設板材５の拡大穴
部４に嵌設されピン３の抜き出し時に前記くびれ部６に
嵌着される環状弾性部材７と、により主要部が構成され
る。As shown in FIG. 1 (a), the pin retaining structure according to the first embodiment of the present invention comprises a first plate 1 having an insertion hole and a second plate 2 having an insertion hole. A pin 3 inserted from one side to the other side by overlapping holes, an additional plate 5 attached to one side of the first plate 1, and a constricted portion 6 formed at the tip of the pin 3. The main part is constituted by an annular elastic member 7 fitted into the enlarged hole 4 of the attached plate 5 and fitted into the constricted part 6 when the pin 3 is pulled out.

【００１８】添設板材５は、既存の挿入孔を有する２枚
の板材、第一板材１と第二板材２とをピン３で止める場
合の係止構造に、新しく第一板材１の一側に添設するピ
ンの挿入孔を有する板材であり、添設板材５の他側には
金属製の環状弾性部材７を装着するためのピンの挿入孔
より大径の拡大穴部４がピンの挿入孔に連接して穿設さ
れている。The additional plate member 5 is newly provided on one side of the first plate member 1 in a locking structure in which two existing plate members having an insertion hole, the first plate member 1 and the second plate member 2 are fixed by pins 3. And an enlarged hole 4 having a diameter larger than that of the pin for mounting the metallic annular elastic member 7 is provided on the other side of the attached plate 5. It is drilled in connection with the insertion hole.

【００１９】くびれ部６は、ピン３の先端部に形成さ
れ、くびれ部６の先端側の段差部６Ａと基端側の拡径部
６Ｂとから構成される。段差部６Ａは、ピンの先端から
段差部６Ａまでの長さＬが前記第一板材１の板厚ｔ以下
の長さとなるように加工されて先端側に形成され、ピン
の挿入孔に密接嵌合する径の円柱部３Ａと前記円柱部３
Ａの径より小径の小円柱部３Ｂとで形成される直角の角
部Ｃを持つ。一方、拡径部６Ｂは、前記小円柱部３Ｂの
基端側に連接される円錐台部３Ｃの斜辺である。前記円
錐台部３Ｃは、上部の径を前期小円柱部３Ｂの径と同一
径、下部の径を円柱部３Ａの径と同一径に形成される。
ピン挿着時に、くびれ部６は、図１（ａ）に示すように
第二板材２の他側の面から突出する。The constricted portion 6 is formed at the distal end of the pin 3 and includes a stepped portion 6A on the distal end side of the constricted portion 6 and an enlarged diameter portion 6B on the proximal end side. The stepped portion 6A is formed on the front end side so that the length L from the tip of the pin to the stepped portion 6A is equal to or less than the plate thickness t of the first plate member 1, and is closely fitted to the insertion hole of the pin. The cylindrical portion 3A and the cylindrical portion 3 having the same diameter.
It has a right-angled corner C formed by a small cylindrical portion 3B having a diameter smaller than the diameter of A. On the other hand, the enlarged diameter portion 6B is an oblique side of the truncated cone portion 3C connected to the base end side of the small columnar portion 3B. The truncated cone portion 3C has an upper diameter formed to be the same as the diameter of the small cylindrical portion 3B, and a lower diameter formed to be the same as the diameter of the cylindrical portion 3A.
When the pin is inserted, the constricted portion 6 protrudes from the other surface of the second plate 2 as shown in FIG.

【００２０】形状が円形で金属製の環状弾性部材７は、
拡大穴部４にばねの作用を利用して僅かに縮小して嵌め
込み、その穴に嵌め合わされたピン３をくびれ部６で固
定するためのものであり、前記添設板材５の他側に穿設
される拡大穴部４に装着される。The annular metal elastic member 7 having a circular shape is
The pin 3 fitted into the enlarged hole 4 is slightly reduced by using the action of a spring, and the pin 3 fitted in the hole is fixed by the constricted portion 6. It is attached to the enlarged hole 4 provided.

【００２１】以上の構成からなる本発明のピンの抜け止
め構造の作用について述べる。図１（ａ）に示すような
ピン３を挿着した状態からピン３を抜き出す時は、図１
（ｂ）に示すように、添設板材５に装着された環状弾性
部材７が、ピン３のくびれ部６に嵌まり段差部６Ａに引
っ掛かり係止するので、ピン３はそれ以上抜けなくなり
ピン３の脱落や紛失がなくなる。また、ピン３の先端か
ら段差部６Ａまでの長さＬが第一板材１の板厚ｔ以下な
ので、ピン３の先端が第二板材２のピン３の挿入孔に引
っ掛かることなく第二板材２を横方向に抜くことができ
る。一方、ピン３を再挿入する時は、添設板材５に装着
された環状弾性部材７が、拡径部６Ｂで徐々に拡大され
くびれ部６から外れるのでピン３は再挿入できる。The operation of the pin retaining structure of the present invention having the above configuration will be described. When removing the pin 3 from the state where the pin 3 is inserted as shown in FIG.
As shown in (b), the annular elastic member 7 attached to the attached plate member 5 fits into the constricted portion 6 of the pin 3 and is hooked and locked on the stepped portion 6A. No loss or loss. Further, since the length L from the tip of the pin 3 to the stepped portion 6A is equal to or less than the thickness t of the first plate 1, the tip of the pin 3 is not caught in the insertion hole of the pin 3 of the second plate 2 and the second plate 2 Can be pulled out laterally. On the other hand, when the pin 3 is reinserted, the annular elastic member 7 attached to the attached plate 5 is gradually expanded at the enlarged diameter portion 6B and comes off the constricted portion 6, so that the pin 3 can be reinserted.

【００２２】本発明の第二実施の形態であるピンの抜け
止め構造を図２に示す。上述した第一実施の形態と同一
部材には同一符号を付して詳細な説明を省略する。この
ピンの抜け止め構造は、図２（ａ）に示すように、挿入
孔を有する第一板材８と挿入孔を有する第二板材２の挿
入孔を重合させて一側から他側に向けて挿入するピン３
と、第一板材８の一側に添設される添設板材９と、ピン
３の先端部に形成されるくびれ部６と、第一板材８の一
側の拡大穴部１０に嵌設され、ピン３の抜き出し時にく
びれ部６に嵌着される環状弾性部材７と、により主要部
が構成される。FIG. 2 shows a pin retaining structure according to a second embodiment of the present invention. The same members as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description is omitted. As shown in FIG. 2 (a), this pin retaining structure is configured such that the insertion holes of the first plate member 8 having the insertion holes and the second plate member 2 having the insertion holes are superimposed from one side to the other side. Pin 3 to insert
And an attached plate 9 attached to one side of the first plate 8, a constricted portion 6 formed at the tip of the pin 3, and an enlarged hole 10 on one side of the first plate 8. The main portion is constituted by the annular elastic member 7 fitted to the constricted portion 6 when the pin 3 is pulled out.

【００２３】第一板材８は、一側に拡大穴部１０を穿設
され前記ピン３の挿入孔を有する板材である。The first plate 8 is a plate having an enlarged hole 10 formed on one side and having an insertion hole for the pin 3.

【００２４】添設板材９は、既存の挿入孔を有する２枚
の板材、第一板材８と第二板材２とをピン３で止める場
合の係止構造に、新しく第一板材８の一側に添設する挿
入孔を有する板材である。The additional plate member 9 is newly provided on one side of the first plate member 8 in a locking structure in which the two plate members having the existing insertion holes, the first plate member 8 and the second plate member 2 are fixed with the pins 3. It is a plate material having an insertion hole attached to the plate.

【００２５】くびれ部６は、ピンの先端部に形成され、
くびれ部６の先端側の段差部６Ａと基端側の拡径部６Ｂ
とから構成される。段差部６Ａは、ピンの先端から段差
部６Ａまでの長さＬと拡大穴部１０の深さｄを加えた長
さが前記第一板材８の板厚ｔ以下の長さとなるように加
工されて先端側に形成され、ピンの挿入孔に密接嵌合す
る径の円柱部３Ａと前記円柱部３Ａの径より小径の小円
柱部３Ｂとで形成される直角の角部Ｃを持つ。一方、拡
径部６Ｂは、前記小円柱部３Ｂの基端側に連接される円
錐台部３Ｃの斜辺である。前記円錐台部３Ｃは、上部の
径を前記小円柱部３Ｂの径と同一径、下部の径を前記円
柱部３Ａの径と同一径に形成される。ピン挿着時に、く
びれ部６は、図２（ａ）に示すように第二板材２の他側
の面から突出する。The constriction 6 is formed at the tip of the pin,
Step 6A at the distal end of constricted portion 6 and enlarged diameter portion 6B at the proximal end
It is composed of The step portion 6A is processed so that the length obtained by adding the length L from the tip of the pin to the step portion 6A and the depth d of the enlarged hole portion 10 is equal to or less than the plate thickness t of the first plate material 8. And has a right-angled corner C formed by a cylindrical portion 3A having a diameter closely fitted to the insertion hole of the pin and a small cylindrical portion 3B having a diameter smaller than the diameter of the cylindrical portion 3A. On the other hand, the enlarged diameter portion 6B is an oblique side of the truncated cone portion 3C connected to the base end side of the small columnar portion 3B. The truncated cone portion 3C has an upper diameter equal to the diameter of the small cylindrical portion 3B and a lower diameter equal to the diameter of the cylindrical portion 3A. At the time of pin insertion, the constricted portion 6 protrudes from the other surface of the second plate member 2 as shown in FIG.

【００２６】形状が円形の金属製の環状弾性部材７は、
拡大穴部１０にばねの作用を利用して僅かに縮小して嵌
め込み、その穴に嵌め合わされたピン３をくびれ部６で
固定するためのものであり、前記第一板材８の一側に穿
設される拡大穴部１０に装着される。The annular metal elastic member 7 having a circular shape is
The pin 3 fitted into the enlarged hole 10 is slightly reduced by using the action of a spring, and the pin 3 fitted in the hole is fixed by the constricted portion 6. It is mounted in the enlarged hole 10 to be provided.

【００２７】以上の構成からなる本発明のピンの抜け止
め構造は前記第一実施の形態の場合と同様に、ピン３を
抜き出す時はピンのくびれ部６を環状弾性部材７で係止
されるのでピン３の抜け落ちが防止されるという作用・
効果が得られる。また、ピン３の先端から段差部６Ａま
での長さＬと前記拡大穴部１０の深さｄを加えた長さ
が、第一板材１の板厚ｔ以下なので、ピン３の先端が第
二板材２のピン３の挿入孔に引っ掛かることなく第二板
材２を横方向に抜くことができる。In the pin retaining structure of the present invention having the above-described structure, the constricted portion 6 of the pin is locked by the annular elastic member 7 when the pin 3 is pulled out, as in the first embodiment. Action to prevent the pin 3 from falling off
The effect is obtained. Further, since the length obtained by adding the length L from the tip of the pin 3 to the step 6A and the depth d of the enlarged hole 10 is equal to or less than the thickness t of the first plate material 1, the tip of the pin 3 is The second plate member 2 can be pulled out laterally without being caught in the insertion hole of the pin 3 of the plate member 2.

【００２８】本発明の第三実施の形態であるピンの抜け
止め構造は、図３に示すように、挿入孔を有する一側の
第一板材１１と、挿入孔を有する中間の第二板材１２
と、挿入孔を有する他側の第三板材１３と、各挿入孔を
重合させて一側から他側に向けて挿入するピン１４と、
第一板材１１の一側に添設される添設板材１５と、ピン
１４の先端部に形成されるくびれ部１６と、前記添設板
材１５の他側に穿設される拡大穴部１８に嵌設され、ピ
ン１３の抜き出し時にくびれ部１６に嵌着される環状弾
性部材１７とにより主要部が構成される。As shown in FIG. 3, the pin retaining structure according to the third embodiment of the present invention includes a first plate member 11 having an insertion hole and an intermediate second plate member 12 having an insertion hole.
A third plate member 13 on the other side having an insertion hole, and a pin 14 for overlapping each insertion hole and inserting from one side to the other side,
The attached plate 15 attached to one side of the first plate 11, the constricted portion 16 formed at the tip of the pin 14, and the enlarged hole 18 provided on the other side of the attached plate 15. The main part is constituted by the annular elastic member 17 fitted and fitted to the constricted part 16 when the pin 13 is pulled out.

【００２９】添設板材１５は、既存の中間の第二板材１
２を挟持する２枚の板材、第一板材１１と第三板材１３
とからなる３枚の挿入孔を有する板材をピン１４で止め
る場合の係止構造に、新しく更に第一板材１１の一側に
添設するピンの挿入孔を有する板材である。添設板材１
５の他側には、環状弾性部材１７を装着するためのピン
の挿入孔より大径の拡大穴部１８がピンの挿入孔に連接
して穿設されている。The additional plate 15 is an existing intermediate second plate 1
2, a first plate 11 and a third plate 13
This is a plate material having a pin insertion hole newly added to one side of the first plate material 11 in addition to a locking structure in which a plate material having three insertion holes is stopped by the pin 14. Attached plate 1
On the other side of 5, an enlarged hole portion 18 having a diameter larger than the insertion hole of the pin for mounting the annular elastic member 17 is formed in connection with the insertion hole of the pin.

【００３０】くびれ部１６は、ピン１４の先端部に形成
され、くびれ部１６の先端側の段差部１６Ａと基端側の
拡径部１６Ｂとから構成される。段差部１６Ａは、ピン
１４の先端から段差部１６Ａまでの長さＬが前記第一板
材１１の板厚ｔ以下の長さとなるように加工されて先端
側に形成され、ピンの挿入孔に密接嵌合する径の円柱部
１４Ａと前記円柱部１４Ａの径より小径の小円柱部１４
Ｂとで形成される直角の角部Ｃを持つ。一方、拡径部１
６Ｂは、円錐台部１４Ｃの下部の径を円柱部１４Ａの径
と同一径、上部の径を小円柱部１４Ｂの径と同一径にし
て、小円柱部１４Ｂの基端側に前記円錐台部１４Ｃを連
接して形成される前記円錐台部１４Ｃの斜辺である。ピ
ン挿着時に、くびれ部１６は、図３（ａ）に示すように
第三板材１３の他側の面から突出する。The constricted portion 16 is formed at the distal end of the pin 14, and includes a step 16A on the distal end side of the constricted portion 16 and an enlarged diameter portion 16B on the proximal end side. The stepped portion 16A is formed on the front end side so that the length L from the tip of the pin 14 to the stepped portion 16A is equal to or less than the plate thickness t of the first plate member 11, and is closely attached to the insertion hole of the pin. A cylindrical portion 14A having a fitting diameter and a small cylindrical portion 14 having a diameter smaller than the diameter of the cylindrical portion 14A.
B and a right-angled corner C formed by B. On the other hand, the enlarged diameter portion 1
6B, the diameter of the lower portion of the truncated cone portion 14C is the same as the diameter of the columnar portion 14A, and the diameter of the upper portion is the same as the diameter of the small columnar portion 14B. 14C is an oblique side of the truncated cone portion 14C formed by connecting 14C. At the time of pin insertion, the constricted portion 16 protrudes from the other surface of the third plate 13 as shown in FIG.

【００３１】形状が円形で金属製の環状弾性部材１７
は、拡大穴部１８にばねの作用を利用して僅かに縮小し
て嵌め込み、環状弾性部材１７の穴に嵌め合わされたピ
ン１４を固定するためのものであり、添設板材１５の他
側に穿設される拡大穴部１８に装着される。An annular elastic member 17 having a circular shape and made of metal
Is used to fix the pin 14 fitted in the hole of the annular elastic member 17 by slightly reducing and fitting it into the enlarged hole portion 18 using the action of a spring. It is mounted in the enlarged hole 18 to be drilled.

【００３２】以上の構成からなる本発明のピンの抜け止
め構造の作用について述べる。図３（ａ）に示すような
ピン１４を挿着した状態からピン１４を抜き出す時は、
図３（ｂ）に示すように、添設板材１５に装着された環
状弾性部材１７が、ピン１４のくびれ部１６に嵌まり段
差部１６Ａに引っ掛かり係止するので、ピン１４はそれ
以上抜けなくなるのでピン１４の脱落や紛失がなくな
る。また、ピン１４の先端から段差部１６Ａまでの長さ
Ｌが前記第一板材１１の板厚ｔ以下の長さとなるように
加工されているので、ピン１４の先端が第一板材１１の
板厚ｔ以下に納まり、ピンの先端が第二板材１２の挿入
孔に引っ掛かることがなく第二板材１２の抜き出しが可
能となる。ー方、ピン１４を再挿入する時は、添設板材
１５に装着された環状弾性部材１７が、拡径部１６Ｂで
徐々に拡大されくびれ部１６から外れるのでピン１４は
再挿入できる。The operation of the pin retaining structure of the present invention having the above configuration will be described. When extracting the pin 14 from the state in which the pin 14 is inserted as shown in FIG.
As shown in FIG. 3B, the annular elastic member 17 attached to the attached plate 15 is fitted into the constricted portion 16 of the pin 14 and is hooked and locked on the step 16A, so that the pin 14 cannot be further removed. Therefore, the pins 14 are not dropped or lost. Further, since the length L from the tip of the pin 14 to the step 16A is processed to be equal to or less than the thickness t of the first plate 11, the tip of the pin 14 is t or less, the tip of the pin does not get caught in the insertion hole of the second plate 12, and the second plate 12 can be extracted. On the other hand, when the pin 14 is reinserted, the annular elastic member 17 attached to the attached plate 15 is gradually enlarged by the enlarged diameter portion 16B and comes off the constricted portion 16, so that the pin 14 can be reinserted.

【００３３】本発明の第四実施の形態であるピンの抜け
止め構造を図４に示す。上述した第三実施の形態と同一
部材には同一符号を付して詳細説明を省略する。このピ
ンの抜け止め構造は、図４（ａ）に示すように、挿入孔
を有する第一板材１９と、挿入孔を有する中間の第二板
材１２と、挿入孔を有する他側の第三板材１３との挿入
孔を重合させて一側から他側に向けて挿入するピン１４
と、第一板材１９の一側に添設される添設板材２０と、
ピン１４の先端部に形成されるくびれ部１６と、第一板
材１９の一側の拡大穴部２１に嵌設され、ピン１４の抜
き出し時にくびれ部１６に嵌着される環状弾性部材１７
と、により主要部が構成される。FIG. 4 shows a pin retaining structure according to a fourth embodiment of the present invention. The same members as those in the third embodiment described above are denoted by the same reference numerals, and detailed description will be omitted. As shown in FIG. 4 (a), the pin retaining structure includes a first plate member 19 having an insertion hole, an intermediate second plate member 12 having an insertion hole, and a third plate member on the other side having an insertion hole. A pin 14 that is inserted from one side to the other side by overlapping the insertion hole with 13
And an attached plate member 20 attached to one side of the first plate member 19;
A constricted portion 16 formed at the tip of the pin 14 and an annular elastic member 17 fitted into the enlarged hole 21 on one side of the first plate member 19 and fitted into the constricted portion 16 when the pin 14 is pulled out.
And constitute the main part.

【００３４】第一板材１９は、一側に拡大穴部２１を穿
設され前記ピン１４の挿入孔を有する板材である。The first plate 19 is a plate having an enlarged hole 21 formed on one side and having an insertion hole for the pin 14.

【００３５】添設板材２０は、既存の中間の第二板材１
２を挟持する２枚の板材、第一板材１９と第三板材１３
とからなる３枚のピンの挿入孔を有する板材をピン１４
で止める場合のピン止め構造に、新しく更に第一板材１
９の一側に添設するピンの挿入孔を有する板材である。The attached plate member 20 is made of the existing intermediate second plate member 1.
2, a first plate 19 and a third plate 13
A plate material having three pin insertion holes consisting of
New pin plate 1 for pinning structure when stopping with
9 is a plate material having an insertion hole for a pin attached to one side.

【００３６】くびれ部１６は、ピン１４の先端部に形成
され、くびれ部１６の先端側の段差部１６Ａと基端側の
拡径部１６Ｂとから構成される。段差部１６Ａは、ピン
の先端から段差部１６Ａまでの長さＬと拡大穴部２１の
深さｄを加えた長さが前記第一板材１９の板厚ｔ以下の
長さとなるように加工されて先端側に形成され、ピンの
挿入孔に密接嵌合する径の円柱部１４Ａと前記円柱部１
４Ａの径より小径の小円柱部１４Ｂとで形成される直角
の角部Ｃを持つ。一方、拡径部１６Ｂは、円錐台部１４
Ｃの下部の径を前記円柱部１４Ａの径と同一径、上部の
径を前記小円柱部１４Ｂの径と同一径にして、前記小円
柱部１４Ｂの基端側に前記円錐台部１４Ｃを連接して形
成される前記円錐台部１４Ｃの斜辺である。ピン挿着時
に、くびれ部１６は、図４（ａ）に示すように第三板材
１３の他側の面から突出する。The constricted portion 16 is formed at the distal end of the pin 14, and includes a step 16A on the distal end side of the constricted portion 16 and an enlarged diameter portion 16B on the proximal end side. The step portion 16A is processed so that the length obtained by adding the length L from the tip of the pin to the step portion 16A and the depth d of the enlarged hole portion 21 is equal to or less than the plate thickness t of the first plate member 19. And a cylindrical portion 14A formed on the distal end side and having a diameter that closely fits into the insertion hole of the pin.
It has a right-angled corner C formed by a small cylindrical portion 14B having a diameter smaller than the diameter of 4A. On the other hand, the enlarged diameter portion 16B is
The diameter of the lower part of C is the same as the diameter of the cylindrical part 14A, and the diameter of the upper part is the same as the diameter of the small cylindrical part 14B, and the truncated cone part 14C is connected to the base end side of the small cylindrical part 14B. This is the hypotenuse of the truncated conical portion 14C. At the time of pin insertion, the constricted portion 16 protrudes from the other surface of the third plate 13 as shown in FIG.

【００３７】形状が円形で鋼製の環状弾性部材１７は、
拡大穴部２１にばねの作用を利用して僅かに縮小して嵌
め込み、環状弾性部材１７の穴に嵌め合わされたピン１
４を固定するためのものであり、第一板材１９の一側に
穿設される拡大穴部２１に装着される。The steel circular elastic member 17 having a circular shape is
The pin 1 fitted in the hole of the annular elastic member 17 is slightly reduced and fitted into the enlarged hole portion 21 using the action of a spring.
4, and is attached to an enlarged hole 21 formed on one side of the first plate 19.

【００３８】以上の構成からなる本発明の第四実施の形
態であるピンの抜け止め構造は、前記第三実施の形態と
同様に、ピン１４を抜き出す時はピン１４のくびれ部１
６を環状弾性部材１７で係止されるのでピン１４の抜け
落ちが防止されるという作用・効果が得られる。また、
ピン１４の先端から段差部１６Ａまでの長さＬと前記拡
大穴部１０の深さｄを加えた長さが、第一板材１９の板
厚ｔ以下なので、ピン１４の先端が第二板材１２のピン
１４の挿入孔に引っ掛かることなく第二板材２を横方向
に抜くことができる。The pin retaining structure according to the fourth embodiment of the present invention having the above-described structure is similar to the third embodiment in that the pin 14 is pulled out when the pin 14 is pulled out.
Since the ring 6 is locked by the annular elastic member 17, the operation and effect of preventing the pin 14 from falling off can be obtained. Also,
Since the length obtained by adding the length L from the tip of the pin 14 to the step 16A and the depth d of the enlarged hole 10 is equal to or less than the thickness t of the first plate 19, the tip of the pin 14 The second plate member 2 can be pulled out laterally without being caught in the insertion hole of the pin 14.

【００３９】本発明の第三実施の形態であるピンの抜け
止め構造を圧着工具に適用した場合の発明を図５に基づ
いて説明する。本発明のピンの抜け止め構造を適用した
圧着工具は、ピストン２３の往復動を変換機構を介して
一対のダイスヘッド２７Ａ，２７Ｂの回動に変換して、
はさみ形式の圧着を行う圧着工具である。前記ダイスヘ
ッド２７Ａ，２７Ｂの後端部を着脱可能に枢着する枢着
軸２９Ａ，２９Ｂのピンの抜け止め構造が、図５に示す
ように、一側三角リンク板３２Ｂの一側に添設される添
設三角リンク板３３Ｂと、ピン３４の先端部に形成され
るくびれ部と、リングばね用溝穴３５に嵌設され、ピン
３４の抜き出し時にくびれ部に嵌着されるリングばね３
１と、により主要部が構成される。すなわち図７と基本
構成は同じである。また、２８Ａは他側の三角リンク
板、３２Ａは一側の三角リンク板である。A third embodiment of the present invention in which the pin retaining structure according to the present invention is applied to a crimping tool will be described with reference to FIG. The crimping tool to which the pin retaining structure of the present invention is applied converts the reciprocating motion of the piston 23 into the rotation of the pair of die heads 27A and 27B via the converting mechanism.
This is a crimping tool that performs scissor-type crimping. As shown in FIG. 5, a pin retaining structure of the pivot shafts 29A, 29B for detachably pivoting the rear ends of the die heads 27A, 27B is provided on one side of the one-sided triangular link plate 32B. The attached triangular link plate 33B, the constricted part formed at the tip of the pin 34, and the ring spring 3 fitted in the ring spring slot 35 and fitted in the constricted part when the pin 34 is pulled out.
1 constitutes a main part. That is, the basic configuration is the same as that of FIG. Further, 28A is a triangular link plate on the other side, and 32A is a triangular link plate on one side.

【００４０】添設三角リンク板３３Ｂは、一側三角リン
ク板３２Ｂの一側に添設され、円形状のリングばね３１
を装着するために、ピンの挿入孔よりも大径のリングば
ね用溝穴３５を、ピンの挿入孔と連接して他側に穿設し
てある。The attached triangular link plate 33B is attached to one side of the one-sided triangular link plate 32B and has a circular shape.
In order to attach the pin, a ring spring slot 35 having a diameter larger than that of the pin insertion hole is formed on the other side in connection with the pin insertion hole.

【００４１】ピン３４の形状は、基端側から先端側に第
一逆円錐台部３４Ａと、第一逆円錐台部３４Ａの上部に
径を同じくして連なるピン孔の径より大径の大円柱部３
４Ｂと、大円柱部３４Ｂの上部に連なるピン孔の径より
小径の第一小円柱部３４Ｃと、第一小円柱部３４Ｃの上
部に径を同じくして連なる第二逆円錐台部３４Ｄと、第
二逆円錐台部３４Ｄの上部に径を同じくして連なるピン
孔に密接嵌合する径の第一中円柱部３４Ｅと、第一中円
柱部３４Ｅの上部に径を同じくして連なる円錐台部３４
Ｆと、円錐台部３４Ｆの上部に径を同じくして連なるピ
ン孔の径より小径の第二小円柱部３４Ｇと、第二小円柱
部３４Ｇの上部に連なるピン孔に密接嵌合する径の第二
中円柱部３４Ｈと、第二中円柱部３４Ｈの上部に径を同
じくして連なる逆椀状の先頭部３４Ｉとを連接して構成
される。The shape of the pin 34 is such that the diameter is larger than the diameter of the first inverted truncated cone portion 34A from the base end side to the tip end side, and the diameter of the pin hole connected to the upper portion of the first inverted truncated cone portion 34A with the same diameter. Column part 3
4B, a first small cylindrical portion 34C having a diameter smaller than the diameter of the pin hole connected to the upper portion of the large cylindrical portion 34B, and a second inverted truncated cone portion 34D having the same diameter as the upper portion of the first small cylindrical portion 34C. A first middle cylindrical portion 34E having a diameter closely fitted to a pin hole connected to the upper portion of the second inverted truncated cone portion 34D with the same diameter, and a truncated cone connected to the upper portion of the first middle cylindrical portion 34E with the same diameter. Part 34
F, a second small cylindrical portion 34G having a diameter smaller than the diameter of the pin hole connected to the upper portion of the truncated conical portion 34F with the same diameter, and a diameter of the diameter closely fitted to the pin hole connected to the upper portion of the second small cylindrical portion 34G. The second middle cylindrical portion 34H and an inverted bowl-shaped head portion 34I connected to the upper portion of the second middle cylindrical portion 34H with the same diameter are connected to each other.

【００４２】くびれ部は、ピン３４の基端側および先端
側に形成される。基端側に設けられるくびれ部は第一小
円柱部３４Ｃと第一小円柱部３４Ｃの上部に径を同じく
して連なる第二逆円錐台部３４Ｄとで形成される。基端
側のくびれ部は、ピンを挿着する場合にリングばね３１
によって固定される。一方、先端側に設けられるくびれ
部は、第二小円柱部３４Ｇと第二小円柱部３４Ｇの上部
に連なるピン孔に密接嵌合する径の第二中円柱部３４Ｈ
とで形成され、ピンの先端から第二小円柱部３４Ｇと第
二中円柱部３４Ｈで形成される直角の角部Ｃまでの長さ
が、一側三角リンク板３２Ｂの板厚以下の長さとなるよ
うに加工されている。先端側のくびれ部は、ピン３４を
抜き出す場合にリングばね３１によって固定される。The constricted portions are formed on the proximal and distal ends of the pin 34. The constricted portion provided on the base end side is formed by a first small cylindrical portion 34C and a second inverted truncated cone portion 34D having the same diameter as the upper portion of the first small cylindrical portion 34C. The constricted portion on the proximal side is a ring spring 31 when a pin is inserted.
Fixed by On the other hand, the constricted portion provided on the distal end side has a second middle cylindrical portion 34H having a diameter closely fitted to the second small cylindrical portion 34G and a pin hole connected to the upper portion of the second small cylindrical portion 34G.
And the length from the tip of the pin to the right-angled corner C formed by the second small cylindrical portion 34G and the second middle cylindrical portion 34H is equal to or less than the thickness of the one-sided triangular link plate 32B. It has been processed to become. The constriction on the tip side is fixed by the ring spring 31 when the pin 34 is pulled out.

【００４３】リングばね３１は、金属製で円形状をして
おり、リングばね用溝穴３５にばねの作用を利用して僅
かに縮小して嵌め込み、リングばね３１の穴で嵌め合わ
されたピン３４を固定するためのものであり、添設三角
リンク板３３Ｂの他側に穿設されるリングばね用溝穴３
５に装着される。The ring spring 31 is made of metal and has a circular shape. The ring spring 31 is slightly reduced and fitted into the ring spring slot 35 by using the action of a spring. And a ring spring slot 3 formed on the other side of the attached triangular link plate 33B.
5 is attached.

【００４４】以上の構成からなる本発明の第三実施の形
態であるピンの抜け止め構造を適用した圧着工具の作用
について述べる。ピン３４を挿着した状態からピン３４
を抜き出す時は、添設三角リンク板３３Ｂに装着された
リングばね３１が、ピン３４の第二中円柱部３４Ｈと第
二小円柱部３４Ｇとで形成される先端側のくびれ部に嵌
まり段差部に引っ掛かり係止するので、ピン３４はそれ
以上抜けなくなりピン３４Ｂの脱落や紛失がなくなる。
また、ピン３４の先端が一側三角リンク板３２Ｂの他側
の面より下に納まるので、ピン３４の先端部がダイスヘ
ッド２７Ａ，２７Ｂの後端部に穿設されたピンの挿入孔
に引っ掛かることがなく、ダイスヘッド２７Ａ，２７Ｂ
の交換が可能となる。ー方、ピン３４を再挿入する時
は、前記添設三角リンク板３３Ｂに装着されたリングば
ね３１が、円錐台部３４Ｆで徐々に拡大され先端側のく
びれ部から外れるのでピン３４が再挿入できる。The operation of the crimping tool to which the pin retaining structure according to the third embodiment of the present invention having the above configuration is applied will be described. From the state where the pin 34 is inserted,
When pulling out, the ring spring 31 attached to the attached triangular link plate 33B fits into the constricted portion on the distal end side formed by the second middle cylindrical portion 34H and the second small cylindrical portion 34G of the pin 34, and the step is formed. Since the pin 34 is caught and locked, the pin 34 does not come off any more, so that the pin 34B does not fall off or is lost.
Further, since the tip of the pin 34 is located below the other surface of the one-sided triangular link plate 32B, the tip of the pin 34 is caught by the pin insertion hole formed in the rear end of the die heads 27A and 27B. No die heads 27A, 27B
Can be exchanged. When reinserting the pin 34, the ring spring 31 attached to the attached triangular link plate 33B is gradually enlarged by the truncated cone portion 34F and comes off from the constricted portion on the tip side, so the pin 34 is reinserted. it can.

【００４５】尚、図示しないが、本発明の第四実施の形
態であるピンの抜け止め構造を圧着工具に適用した場合
も上述した場合と同様に、ピン３４を抜き出す時はピン
３４のくびれ部をリングばね３１で係止されるのでピン
３４の抜け落ちが防止されるという作用・効果が得られ
る。Although not shown, when the pin retaining structure according to the fourth embodiment of the present invention is applied to a crimping tool, similarly to the case described above, when the pin 34 is pulled out, the constricted portion of the pin 34 is used. Is locked by the ring spring 31, so that the function and effect of preventing the pin 34 from falling off can be obtained.

【００４６】以上の構成からなる本発明によれば、 （１）高所作業中に圧着工具のダイスヘッドを交換する
場合、リングばねがピンのくびれ部に嵌まり段差部に引
っ掛かるので、ピンはそれ以上抜けない。従って、ピン
の脱落や紛失がなく、簡単にダイスヘッドの交換ができ
るので作業効率が向上する。 （２）加工する構造が簡単で小型なので、既存の抜け止
め構造に、後からでもピンの抜け止め構造が追加できる
ピンの抜け止め構造およびその抜け止め構造を持った圧
着工具を提供できる。According to the present invention having the above-described structure, (1) When the die head of the crimping tool is replaced during work at a high place, the ring spring is fitted into the constricted portion of the pin and is hooked on the step portion. I can't go any further. Therefore, the die head can be easily replaced without the pins being dropped or lost, and the work efficiency is improved. (2) Since the structure to be processed is simple and small, it is possible to provide a pin retaining structure in which a pin retaining structure can be added to an existing retaining structure later, and a crimping tool having the retaining structure.

【００４７】[0047]

【発明の効果】以上の構成と作用からなる本発明によれ
ば、 （１）既存のピンの抜け止め構造に、特別な固定方法を
必要とせずに、ピンの挿入孔を有する１枚板材を添設
し、ピンにくびれ部を形成して、そのくびれ部に嵌着す
る環状弾性部材と、その環状弾性部材を装着するための
溝穴をピンの挿入孔に設けるという簡単な構造で、ピン
のくびれ部を係止することによりピンの抜け落ちるのを
止めることができる。 （２）ピンを抜き出す時は、挿入孔内のピンの先端が必
ず第一板材の他側の面以下に納まるので挟持される中間
板材である第二板材の抜き出しが可能となる。 （３）高所作業等で圧着工具のダイスヘッドを交換する
場合に、ピンの落下や紛失がなく、加工する構造が簡単
で小型であるので、既存のピンの抜け止め構造に、後か
らでも追加できるピンの抜け止め構造およびその抜け止
め構造を持った圧着工具を提供できる。According to the present invention having the above configuration and operation, (1) a single plate material having a pin insertion hole can be provided in an existing pin retaining structure without requiring a special fixing method. The pin has a simple structure in which a constricted portion is formed on the pin, an annular elastic member to be fitted in the constricted portion, and a slot for mounting the annular elastic member are provided in the insertion hole of the pin. The pin can be prevented from falling off by locking the constriction. (2) When pulling out the pin, the tip of the pin in the insertion hole always fits below the surface on the other side of the first plate, so that the second plate, which is the intermediate plate to be clamped, can be pulled out. (3) When replacing the die head of the crimping tool during work at high places, etc., the pin is not dropped or lost, and the processing structure is simple and compact. A pin retaining structure that can be added and a crimping tool having the retaining structure can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図１】（ａ）本発明の第一実施の形態であるピンの抜
け止め構造の縦断面図。 （ｂ）本発明の第一実施の形態であるピンを抜き取る場
合の抜け止め構造の縦断面図。FIG. 1A is a longitudinal sectional view of a pin retaining structure according to a first embodiment of the present invention. (B) Longitudinal sectional view of the retaining structure when removing the pin according to the first embodiment of the present invention.

【図２】（ａ）本発明の第二実施の形態であるピンの抜
け止め構造の縦断面図。 （ｂ）本発明の第二実施の形態であるピンを抜き取る場
合の抜け止め構造の縦断面図。FIG. 2A is a longitudinal sectional view of a pin retaining structure according to a second embodiment of the present invention. (B) A longitudinal cross-sectional view of a retaining structure for extracting a pin according to a second embodiment of the present invention.

【図３】（ａ）本発明の第三実施の形態であるピンの抜
け止め構造の縦断面図。 （ｂ）本発明の第三実施の形態であるピンを抜き取る場
合の抜け止め構造の縦断面図。FIG. 3A is a longitudinal sectional view of a pin retaining structure according to a third embodiment of the present invention. (B) Longitudinal sectional view of a retaining structure for removing a pin according to a third embodiment of the present invention.

【図４】（ａ）本発明の第四実施の形態であるピンの抜
け止め構造の縦断面図。 （ｂ）本発明の第四実施の形態であるピンを抜き取る場
合の抜け止め構造の縦断面図。FIG. 4 (a) is a longitudinal sectional view of a pin retaining structure according to a fourth embodiment of the present invention. (B) Longitudinal sectional view of a retaining structure for extracting a pin according to a fourth embodiment of the present invention.

【図５】本発明の第三実施の形態であるピンの抜け止め
構造を適用した圧着工具の他側から見た平面図。FIG. 5 is a plan view from the other side of a crimping tool to which a pin retaining structure according to a third embodiment of the present invention is applied.

【図６】（ａ）従来の実施の形態であるピンの抜け止め
構造の縦断面図。 （ｂ）従来の実施の形態であるピンを抜き取る場合の抜
け止め構造の縦断面図。FIG. 6A is a longitudinal sectional view of a pin retaining structure according to a conventional embodiment. (B) A longitudinal sectional view of a retaining structure according to a conventional embodiment when pulling out a pin.

【図７】従来の実施の形態であるピンの抜け止め構造を
応用した圧着工具の他側から見た平面図。FIG. 7 is a plan view seen from the other side of a crimping tool to which a pin retaining structure according to a conventional embodiment is applied.

【図８】（ａ）従来の他の実施の形態であるピンの抜け
止め構造の縦断面図。 （ｂ）従来の他の実施の形態であるピンを抜き取る場合
の抜け止め構造の縦断面図。8A is a longitudinal sectional view of a pin retaining structure according to another conventional embodiment. FIG. (B) A longitudinal sectional view of a retaining structure for removing a pin according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ 第一板材 ２ 第二板材 ３ ピン ３Ａ 円柱部 ３Ｂ 小円柱部 ３Ｃ 円錐台部 ４ 拡大穴部 ５ 添設板材 ６ くびれ部 ６Ａ 段差部 ６Ｂ 拡径部 ７ 環状弾性部材 ８ 第一板材 ９ 添設板材 １０ 拡大穴部 １１ 第一板材 １２ 第二板材 １３ 第三板材 １４ ピン １４Ａ 円柱部 １４Ｂ 小円柱部 １４Ｃ 円錐台部 １５ 添設板材 １６ くびれ部 １６Ａ 段差部 １６Ｂ 拡径部 １７ 環状弾性部材 １８ 拡大穴部 １９ 第一板材 ２０ 添設板材 ２１ 拡大穴部 ２２ フレ−ム ２３ ピストン ２４Ａ，２４Ｂ リンクロッド ２５ 連結板 ２６ 連結材 ２７Ａ，２７Ｂ ダイスヘッド ２８Ａ，２８Ｂ 他側三角リンク板 ２９Ａ，２９Ｂ 枢着軸 ３０Ａ，３０Ｂ 圧着ダイス部 ３１ リングばね ３２Ａ，３２Ｂ 一側三角リンク板 ３３Ｂ 添設三角リンク板 ３４ ピン ３４Ａ 第一逆円錐台部 ３４Ｂ 大円柱部 ３４Ｃ 第一小円柱部 ３４Ｄ 第二逆円錐台部 ３４Ｅ 第一中円柱部 ３４Ｆ 円錐台部 ３４Ｇ 第二小円柱部 ３４Ｈ 第二中円柱部 ３４Ｉ 先頭部 ３５ リングばね用溝穴 ３６ 止めピン ３７ スナップリング ３８ 枢着軸 ３９ 枢着軸 ４０ 枢着軸 ４１ 枢着軸 Ｃ 直角の角部 DESCRIPTION OF SYMBOLS 1 1st board material 2 2nd board material 3 pin 3A cylindrical part 3B small cylindrical part 3C truncated-cone part 4 enlarged hole part 5 additional board material 6 constriction part 6A step part 6B enlarged diameter part 7 annular elastic member 8 first board material 9 additional equipment Plate material 10 Enlarged hole portion 11 First plate material 12 Second plate material 13 Third plate material 14 Pin 14A Cylindrical portion 14B Small cylindrical portion 14C Truncated cone portion 15 Attached plate material 16 Constricted portion 16A Stepped portion 16B Large diameter portion 17 Ring elastic member 18 Enlargement Hole portion 19 First plate member 20 Attached plate member 21 Enlarged hole portion 22 Frame 23 Piston 24A, 24B Link rod 25 Connecting plate 26 Connecting member 27A, 27B Die head 28A, 28B Other triangular link plate 29A, 29B Pivot shaft 30A, 30B Crimping die 31 Ring spring 32A, 32B Triangular link plate on one side 33B Triangular link plate attached 34 Pin 34A No. Inverted truncated cone 34B Large cylinder 34C First small cylinder 34D Second inverted truncated cone 34E First middle cylinder 34F Truncated cone 34G Second small cylinder 34H Second middle cylinder 34I Head 35 Ring spring Slot 36 Stop pin 37 Snap ring 38 Pivot axis 39 Pivot axis 40 Pivot axis 41 Pivot axis C Right angle corner

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 挿入孔を有する一側の第一板材と、挿入
孔を有する他側の第二板材と、重なり合う前記各挿入孔
に一側から他側に向けて挿入されるピンと、 を含む係止構造において、 前記第一板材の一側に添設され、他側に拡大穴部が穿設
され前記ピンが挿入される挿入孔を有する添設板材と、 前記ピンはその先端部に、先端からピンの段差部までの
長さが前記第一板材の板厚以下の長さとなるように加工
された、先端側に前記段差部を有し基端側に拡径部を有
するくびれ部を形成し、 前記拡大穴部に嵌設され、前
記ピンの抜き出し時に前記くびれ部に嵌着される環状弾
性部材と、 を含むことを特徴とするピンの抜け止め構造。1. A first plate member having one insertion hole, a second plate member having another insertion hole, and a pin inserted into one of the overlapping insertion holes from one side toward the other side. In the locking structure, an additional plate material that is attached to one side of the first plate material and has an insertion hole into which an enlarged hole is drilled and the pin is inserted on the other side, and the pin is provided at a tip end thereof. A constricted part having the stepped part on the distal end side and the enlarged diameter part on the base end side, processed so that the length from the distal end to the step portion of the pin is equal to or less than the thickness of the first plate material. An annular elastic member which is formed and fitted into the enlarged hole portion and which is fitted into the constricted portion when the pin is pulled out. 【請求項２】 挿入孔を有する一側の第一板材と、挿入
孔を有する他側の第二板材と、重なり合う前記各挿入孔
に一側から他側に向けて挿入されるピンと、 を含む係止構造において、 前記第一板材の一側に拡大穴部が穿設される前記挿入孔
を有する第一板材と、 前記第一板材の一側に添設され、前記ピンが挿入される
挿入孔を有する添設板材と、 前記ピンはその先端部に、先端からピンの段差部までの
長さと前記拡大穴部の深さを加えた長さが前記第一板材
の板厚以下の長さとなるように加工された、先端側に前
記段差部を有し基端側に拡径部を有するくびれ部を形成
し、 前記拡大穴部に嵌設され、前記ピンの抜き出し時に前記
くびれ部に嵌着される環状弾性部材と、 を含むことを特徴とするピンの抜け止め構造。2. A first plate member having one insertion hole, a second plate member having another insertion hole, and a pin inserted into each of the overlapping insertion holes from one side toward the other side. In the locking structure, a first plate having the insertion hole in which an enlarged hole is formed on one side of the first plate, and an insertion that is attached to one side of the first plate and into which the pin is inserted. An attached plate having a hole, wherein the pin has a length equal to or less than the plate thickness of the first plate, the length of which is the sum of the length from the tip to the step of the pin and the depth of the enlarged hole at the tip of the pin. Forming a constricted portion having the stepped portion on the distal end side and an enlarged diameter portion on the base end side, which is fitted into the enlarged hole portion, and fitted into the constricted portion when the pin is extracted. And a ring elastic member to be attached. 【請求項３】 挿入孔を有する一側の第一板材と、挿入
孔を有する中間の第二板材と、挿入孔を有する他側の第
三板材と、重なり合う前記各挿入孔に一側から他側に向
けて挿入されるピンと、 を含む係止構造において、 前記第一板材の一側に添設され、他側に拡大穴部が穿設
され前記ピンが挿入される挿入孔を有する添設板材と、 前記ピンはその先端部に、先端からピンの段差部までの
長さが前記第一板材の板厚以下の長さとなるように加工
された、先端側に前記段差部を有し基端側に拡径部を有
するくびれ部を形成し、 前記拡大穴部に嵌設され、前記ピンの抜き出し時に前記
くびれ部に嵌着される環状弾性部材と、 を含むことを特徴とするピンの抜け止め構造。3. A first plate member on one side having an insertion hole, an intermediate second plate member having an insertion hole, and a third plate member on the other side having an insertion hole. And a pin inserted toward the side, wherein an additional hole is provided on one side of the first plate member, and an enlarged hole is formed on the other side, and an insertion hole for inserting the pin is provided. A plate material, wherein the pin has a stepped portion at a tip end, the tip having a step from the tip to a stepped portion of the pin having a length equal to or less than the plate thickness of the first plate material. A constricted portion having an enlarged diameter portion on the end side, an annular elastic member fitted to the enlarged hole portion and fitted to the constricted portion when the pin is pulled out. Retaining structure. 【請求項４】 挿入孔を有する一側の第一板材と、挿入
孔を有する中間の第二板材と、挿入孔を有する他側の第
三板材と、重なり合う前記各挿入孔に一側から他側に向
けて挿入されるピンと、を含む係止構造において、 前記第一板材の一側に拡大穴部が穿設される前記挿入孔
を有する第一板材と、 前記第一板材の一側に添設され、ピンが挿入される挿入
孔を有する添設板材と、 前記ピンはその先端部に、先端からピンの段差部までの
長さと前記拡大穴部の深さを加えた長さが前記第一板材
の板厚以下の長さとなるように加工された、先端側に前
記段差部を有し基端側に拡径部を有するくびれ部を形成
し、 前記拡大穴部に嵌設され、前記ピンの抜き出し時に前記
くびれ部に嵌着される環状弾性部材と、 を含むことを特徴とするピンの抜け止め構造。4. A first plate member having one insertion hole, an intermediate second plate member having an insertion hole, and a third plate member having another insertion hole. A pin inserted toward the side, a first plate member having the insertion hole in which an enlarged hole is formed in one side of the first plate member, and a pin in one side of the first plate member. An attached plate member having an insertion hole into which the pin is inserted, and the pin has a length obtained by adding a length from a tip to a step portion of the pin and a depth of the enlarged hole to a tip portion of the pin. Processed to have a length equal to or less than the plate thickness of the first plate material, forming a constricted portion having the stepped portion on the distal end side and an enlarged diameter portion on the base end side, fitted in the enlarged hole portion, An annular elastic member fitted into the constricted portion when the pin is withdrawn. Elephants. 【請求項５】 工具ボディの前部に取り付けたフレ−ム
に、ピストンを中心にして上下に枢着した一対のリンク
ロッドと、ピストンの先端部に取り付けた連結板と、一
対のダイスヘッドの後端部とを、一対の三角リンク板の
各頂点部にピンによりそれぞれ着脱可能に枢着すること
により連結してなるリンク機構を利用して、ピストンの
往復動を一対のダイスヘッドの回転に変換して、はさみ
形式の圧着を行う圧着工具において、 前記ダイスヘッドの後端部を着脱可能に枢着するピンの
抜け止め構造は、 前記一側三角リンク板の一側に添設され、他側にリング
ばね用溝穴が穿設され前記ピンが挿入される挿入孔を有
する添設三角リンク板と、 前記ピンはその先端部に、先端からピンの段差部までの
長さが前記一側三角リンク板の板厚以下の長さとなるよ
うに加工された、先端側に前記段差部を有し基端側に拡
径部を有するくびれ部を形成し、 前記リングばね用溝穴に嵌設され、前記ピンの抜き出し
時に前記くびれ部に嵌着されるリングばねと、 を備えていることを特徴とするピンの抜け止め構造。5. A frame attached to a front portion of a tool body, a pair of link rods pivoted vertically around a piston, a connecting plate attached to a tip of the piston, and a pair of die heads. The reciprocating movement of the piston is used to rotate the pair of die heads using a link mechanism that is connected by connecting the rear end part to each apex part of a pair of triangular link plates so as to be detachable and pivotable with pins. Converting, in a crimping tool for performing scissor-type crimping, a pin retaining structure for detachably pivoting the rear end of the die head is attached to one side of the one-sided triangular link plate, A triangular link plate having an insertion hole into which a groove for a ring spring is bored and having the pin inserted therein; and the pin has a distal end portion having a length from the distal end to a step portion of the pin on one side. Length less than the thickness of the triangular link plate Forming a constricted portion having the stepped portion on the distal end side and an enlarged diameter portion on the proximal end side, which is fitted to the groove for the ring spring, and the constriction when the pin is pulled out. And a ring spring fitted to the portion. 【請求項６】 工具ボディの前部に取り付けたフレ−ム
に、ピストンを中心にして上下に枢着した一対のリンク
ロッドと、ピストンの先端部に取り付けた連結板と、一
対のダイスヘッドの後端部とを、一対の三角リンク板の
各頂点部にピンによりそれぞれ着脱可能に枢着すること
により連結してなるリンク機構を利用して、ピストンの
往復動を一対のダイスヘッドの回転に変換して、はさみ
形式の圧着を行う圧着工具において、 前記ダイスヘッドの後端部を着脱可能に枢着するピンの
抜け止め構造は、 前記三角リンク板の一側にリングばね用溝穴が穿設さ
れ、他側にピンが挿入される挿入孔を有する一側三角リ
ンク板と、 前記一側三角リンク板の一側に添設され、前記ピンが挿
入される挿入孔を有する添設三角リンク板と、 前記ピンはその先端部、先端からピンの段差部までの長
さと前記リングばね用溝穴の深さを加えた長さが前記一
側三角リンク板の板厚以下の長さとなるように加工され
た、先端側に前記段差部を有し基端側に拡径部を有する
くびれ部を形成し、 前記リングばね用溝穴に嵌設され、前記ピンの抜き出し
時に前記くびれ部に嵌着されるリングばねと、 を備えていることを特徴とするピンの抜け止め構造。6. A pair of link rods which are pivotally attached to the frame mounted on the front part of the tool body, centering on the piston, a connecting plate mounted on the tip of the piston, and a pair of die heads. The reciprocating movement of the piston is used to rotate the pair of die heads using a link mechanism that is connected by connecting the rear end part to each apex part of a pair of triangular link plates so as to be detachable and pivotable with pins. In a crimping tool that converts and performs scissor-type crimping, a pin retaining structure that detachably pivots the rear end of the die head is provided with a ring spring slot on one side of the triangular link plate. A triangular link plate having an insertion hole into which a pin is inserted on the other side, and an additional triangular link attached to one side of the triangular link plate and having an insertion hole into which the pin is inserted. Board and said pin The tip end side is processed so that the length obtained by adding the length from the end and the tip to the step portion of the pin and the depth of the ring spring slot is equal to or less than the thickness of the one-sided triangular link plate. Forming a constricted portion having the stepped portion and having an enlarged diameter portion on the base end side, fitted in the ring spring slot, and fitted to the constricted portion when the pin is extracted, A pin retaining structure characterized by comprising: